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chromium / external / github.com / emscripten-core / emscripten / refs/heads/android.wasm / . / src / library.js
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/**
* @license
* Copyright 2010 The Emscripten Authors
* SPDX-License-Identifier: MIT
*/
//"use strict";
// An implementation of basic necessary libraries for the web. This integrates
// with a compiled libc and with the rest of the JS runtime.
//
// We search the Library object when there is an external function. If the
// entry in the Library is a function, we insert it. If it is a string, we
// do another lookup in the library (a simple way to write a function once,
// if it can be called by different names). We also allow dependencies,
// using __deps. Initialization code to be run after allocating all
// global constants can be defined by __postset.
//
// Note that the full function name will be '_' + the name in the Library
// object. For convenience, the short name appears here. Note that if you add a
// new function with an '_', it will not be found.
addToLibrary({
$ptrToString: (ptr) => {
#if ASSERTIONS
assert(typeof ptr === 'number');
#endif
#if !CAN_ADDRESS_2GB && !MEMORY64
// With CAN_ADDRESS_2GB or MEMORY64, pointers are already unsigned.
ptr >>>= 0;
#endif
return '0x' + ptr.toString(16).padStart(8, '0');
},
$zeroMemory: (address, size) => {
#if LEGACY_VM_SUPPORT
if (!HEAPU8.fill) {
for (var i = 0; i < size; i++) {
HEAPU8[address + i] = 0;
}
return;
}
#endif
HEAPU8.fill(0, address, address + size);
return address;
},
#if SAFE_HEAP
// Trivial wrappers around runtime functions that make these symbols available
// to native code.
segfault: () => segfault(),
alignfault: () => alignfault(),
#endif
// ==========================================================================
// JavaScript <-> C string interop
// ==========================================================================
#if !MINIMAL_RUNTIME
$exitJS__docs: '/** @param {boolean|number=} implicit */',
$exitJS__deps: ['proc_exit'],
$exitJS: (status, implicit) => {
EXITSTATUS = status;
#if ASSERTIONS && !EXIT_RUNTIME
checkUnflushedContent();
#endif // ASSERTIONS && !EXIT_RUNTIME
#if PTHREADS
if (ENVIRONMENT_IS_PTHREAD) {
// implict exit can never happen on a pthread
#if ASSERTIONS
assert(!implicit);
#endif
#if PTHREADS_DEBUG
dbg(`Pthread ${ptrToString(_pthread_self())} called exit(), posting exitOnMainThread.`);
#endif
// When running in a pthread we propagate the exit back to the main thread
// where it can decide if the whole process should be shut down or not.
// The pthread may have decided not to exit its own runtime, for example
// because it runs a main loop, but that doesn't affect the main thread.
exitOnMainThread(status);
throw 'unwind';
}
#if PTHREADS_DEBUG
err(`main thread called exit: keepRuntimeAlive=${keepRuntimeAlive()} (counter=${runtimeKeepaliveCounter})`);
#endif // PTHREADS_DEBUG
#endif // PTHREADS
#if EXIT_RUNTIME
if (!keepRuntimeAlive()) {
exitRuntime();
}
#endif
#if ASSERTIONS
// if exit() was called explicitly, warn the user if the runtime isn't actually being shut down
if (keepRuntimeAlive() && !implicit) {
var msg = `program exited (with status: ${status}), but keepRuntimeAlive() is set (counter=${runtimeKeepaliveCounter}) due to an async operation, so halting execution but not exiting the runtime or preventing further async execution (you can use emscripten_force_exit, if you want to force a true shutdown)`;
#if MODULARIZE
readyPromiseReject(msg);
#endif // MODULARIZE
err(msg);
}
#endif // ASSERTIONS
_proc_exit(status);
},
#endif
#if MINIMAL_RUNTIME
// minimal runtime doesn't do any exit cleanup handling so just
// map exit directly to the lower-level proc_exit syscall.
exit: 'proc_exit',
#else
exit: '$exitJS',
#endif
// Returns a pointer ('p'), which means an i32 on wasm32 and an i64 wasm64
// We have a separate JS version `getHeapMax()` which can be called directly
// avoiding any wrapper added for wasm64.
emscripten_get_heap_max__deps: ['$getHeapMax'],
emscripten_get_heap_max: () => getHeapMax(),
$getHeapMax: () =>
#if ALLOW_MEMORY_GROWTH
#if MEMORY64 == 1
{{{ MAXIMUM_MEMORY }}},
#else
// Stay one Wasm page short of 4GB: while e.g. Chrome is able to allocate
// full 4GB Wasm memories, the size will wrap back to 0 bytes in Wasm side
// for any code that deals with heap sizes, which would require special
// casing all heap size related code to treat 0 specially.
{{{ Math.min(MAXIMUM_MEMORY, FOUR_GB - WASM_PAGE_SIZE) }}},
#endif
#else // no growth
HEAPU8.length,
#endif
#if ABORTING_MALLOC
$abortOnCannotGrowMemory: (requestedSize) => {
#if ASSERTIONS
#if ALLOW_MEMORY_GROWTH
abort(`Cannot enlarge memory arrays to size ${requestedSize} bytes (OOM). If you want malloc to return NULL (0) instead of this abort, do not link with -sABORTING_MALLOC (that is, the default when growth is enabled is to not abort, but you have overridden that)`);
#else // ALLOW_MEMORY_GROWTH
abort(`Cannot enlarge memory arrays to size ${requestedSize} bytes (OOM). Either (1) compile with -sINITIAL_MEMORY=X with X higher than the current value ${HEAP8.length}, (2) compile with -sALLOW_MEMORY_GROWTH which allows increasing the size at runtime, or (3) if you want malloc to return NULL (0) instead of this abort, compile with -sABORTING_MALLOC=0`);
#endif // ALLOW_MEMORY_GROWTH
#else // ASSERTIONS
abort('OOM');
#endif // ASSERTIONS
},
#endif // ABORTING_MALLOC
#if TEST_MEMORY_GROWTH_FAILS
$growMemory: (size) => false,
#else
// Grows the wasm memory to the given byte size, and updates the JS views to
// it. Returns 1 on success, 0 on error.
$growMemory: (size) => {
var b = wasmMemory.buffer;
var pages = (size - b.byteLength + {{{ WASM_PAGE_SIZE - 1 }}}) / {{{ WASM_PAGE_SIZE }}};
#if RUNTIME_DEBUG
dbg(`growMemory: ${size} (+${size - b.byteLength} bytes / ${pages} pages)`);
#endif
#if MEMORYPROFILER
var oldHeapSize = b.byteLength;
#endif
try {
// round size grow request up to wasm page size (fixed 64KB per spec)
wasmMemory.grow(pages); // .grow() takes a delta compared to the previous size
updateMemoryViews();
#if MEMORYPROFILER
if (typeof emscriptenMemoryProfiler != 'undefined') {
emscriptenMemoryProfiler.onMemoryResize(oldHeapSize, b.byteLength);
}
#endif
return 1 /*success*/;
} catch(e) {
#if ASSERTIONS
err(`growMemory: Attempted to grow heap from ${b.byteLength} bytes to ${size} bytes, but got error: ${e}`);
#endif
}
// implicit 0 return to save code size (caller will cast "undefined" into 0
// anyhow)
},
#endif // ~TEST_MEMORY_GROWTH_FAILS
emscripten_resize_heap__deps: [
'$getHeapMax',
#if ASSERTIONS == 2
'emscripten_get_now',
#endif
#if ABORTING_MALLOC
'$abortOnCannotGrowMemory',
#endif
#if ALLOW_MEMORY_GROWTH
'$growMemory',
#endif
],
emscripten_resize_heap: 'ip',
emscripten_resize_heap: (requestedSize) => {
var oldSize = HEAPU8.length;
#if !MEMORY64 && !CAN_ADDRESS_2GB
// With CAN_ADDRESS_2GB or MEMORY64, pointers are already unsigned.
requestedSize >>>= 0;
#endif
#if ALLOW_MEMORY_GROWTH == 0
#if ABORTING_MALLOC
abortOnCannotGrowMemory(requestedSize);
#else
return false; // malloc will report failure
#endif // ABORTING_MALLOC
#else // ALLOW_MEMORY_GROWTH == 0
// With multithreaded builds, races can happen (another thread might increase the size
// in between), so return a failure, and let the caller retry.
#if SHARED_MEMORY
if (requestedSize <= oldSize) {
return false;
}
#elif ASSERTIONS
assert(requestedSize > oldSize);
#endif
#if EMSCRIPTEN_TRACING
// Report old layout one last time
_emscripten_trace_report_memory_layout();
#endif
// Memory resize rules:
// 1. Always increase heap size to at least the requested size, rounded up
// to next page multiple.
// 2a. If MEMORY_GROWTH_LINEAR_STEP == -1, excessively resize the heap
// geometrically: increase the heap size according to
// MEMORY_GROWTH_GEOMETRIC_STEP factor (default +20%), At most
// overreserve by MEMORY_GROWTH_GEOMETRIC_CAP bytes (default 96MB).
// 2b. If MEMORY_GROWTH_LINEAR_STEP != -1, excessively resize the heap
// linearly: increase the heap size by at least
// MEMORY_GROWTH_LINEAR_STEP bytes.
// 3. Max size for the heap is capped at 2048MB-WASM_PAGE_SIZE, or by
// MAXIMUM_MEMORY, or by ASAN limit, depending on which is smallest
// 4. If we were unable to allocate as much memory, it may be due to
// over-eager decision to excessively reserve due to (3) above.
// Hence if an allocation fails, cut down on the amount of excess
// growth, in an attempt to succeed to perform a smaller allocation.
// A limit is set for how much we can grow. We should not exceed that
// (the wasm binary specifies it, so if we tried, we'd fail anyhow).
var maxHeapSize = getHeapMax();
if (requestedSize > maxHeapSize) {
#if ASSERTIONS
err(`Cannot enlarge memory, requested ${requestedSize} bytes, but the limit is ${maxHeapSize} bytes!`);
#endif
#if ABORTING_MALLOC
abortOnCannotGrowMemory(requestedSize);
#else
return false;
#endif
}
var alignUp = (x, multiple) => x + (multiple - x % multiple) % multiple;
// Loop through potential heap size increases. If we attempt a too eager
// reservation that fails, cut down on the attempted size and reserve a
// smaller bump instead. (max 3 times, chosen somewhat arbitrarily)
for (var cutDown = 1; cutDown <= 4; cutDown *= 2) {
#if MEMORY_GROWTH_LINEAR_STEP == -1
var overGrownHeapSize = oldSize * (1 + {{{ MEMORY_GROWTH_GEOMETRIC_STEP }}} / cutDown); // ensure geometric growth
#if MEMORY_GROWTH_GEOMETRIC_CAP
// but limit overreserving (default to capping at +96MB overgrowth at most)
overGrownHeapSize = Math.min(overGrownHeapSize, requestedSize + {{{ MEMORY_GROWTH_GEOMETRIC_CAP }}} );
#endif
#else
var overGrownHeapSize = oldSize + {{{ MEMORY_GROWTH_LINEAR_STEP }}} / cutDown; // ensure linear growth
#endif
var newSize = Math.min(maxHeapSize, alignUp(Math.max(requestedSize, overGrownHeapSize), {{{ WASM_PAGE_SIZE }}}));
#if ASSERTIONS == 2
var t0 = _emscripten_get_now();
#endif
var replacement = growMemory(newSize);
#if ASSERTIONS == 2
var t1 = _emscripten_get_now();
dbg(`Heap resize call from ${oldSize} to ${newSize} took ${(t1 - t0)} msecs. Success: ${!!replacement}`);
#endif
if (replacement) {
#if ASSERTIONS && WASM2JS
err('Warning: Enlarging memory arrays, this is not fast! ' + [oldSize, newSize]);
#endif
#if EMSCRIPTEN_TRACING
traceLogMessage("Emscripten", `Enlarging memory arrays from ${oldSize} to ${newSize}`);
// And now report the new layout
_emscripten_trace_report_memory_layout();
#endif
return true;
}
}
#if ASSERTIONS
err(`Failed to grow the heap from ${oldSize} bytes to ${newSize} bytes, not enough memory!`);
#endif
#if ABORTING_MALLOC
abortOnCannotGrowMemory(requestedSize);
#else
return false;
#endif
#endif // ALLOW_MEMORY_GROWTH
},
// Called after wasm grows memory. At that time we need to update the views.
// Without this notification, we'd need to check the buffer in JS every time
// we return from any wasm, which adds overhead. See
// https://github.com/WebAssembly/WASI/issues/82
emscripten_notify_memory_growth: (memoryIndex) => {
#if ASSERTIONS
assert(memoryIndex == 0);
#endif
updateMemoryViews();
},
system__deps: ['$setErrNo'],
system: (command) => {
#if ENVIRONMENT_MAY_BE_NODE
if (ENVIRONMENT_IS_NODE) {
if (!command) return 1; // shell is available
var cmdstr = UTF8ToString(command);
if (!cmdstr.length) return 0; // this is what glibc seems to do (shell works test?)
var cp = require('child_process');
var ret = cp.spawnSync(cmdstr, [], {shell:true, stdio:'inherit'});
var _W_EXITCODE = (ret, sig) => ((ret) << 8 | (sig));
// this really only can happen if process is killed by signal
if (ret.status === null) {
// sadly node doesn't expose such function
var signalToNumber = (sig) => {
// implement only the most common ones, and fallback to SIGINT
switch (sig) {
case 'SIGHUP': return 1;
case 'SIGINT': return 2;
case 'SIGQUIT': return 3;
case 'SIGFPE': return 8;
case 'SIGKILL': return 9;
case 'SIGALRM': return 14;
case 'SIGTERM': return 15;
}
return 2; // SIGINT
}
return _W_EXITCODE(0, signalToNumber(ret.signal));
}
return _W_EXITCODE(ret.status, 0);
}
#endif // ENVIRONMENT_MAY_BE_NODE
// int system(const char *command);
// http://pubs.opengroup.org/onlinepubs/000095399/functions/system.html
// Can't call external programs.
if (!command) return 0; // no shell available
setErrNo({{{ cDefs.ENOSYS }}});
return -1;
},
// ==========================================================================
// stdlib.h
// ==========================================================================
// TODO: There are currently two abort() functions that get imported to asm
// module scope: the built-in runtime function abort(), and this library
// function _abort(). Remove one of these, importing two functions for the
// same purpose is wasteful.
abort: () => {
#if ASSERTIONS
abort('native code called abort()');
#else
abort('');
#endif
},
// This object can be modified by the user during startup, which affects
// the initial values of the environment accessible by getenv.
$ENV: {},
// In -Oz builds, we replace memcpy() altogether with a non-unrolled wasm
// variant, so we should never emit emscripten_memcpy_js() in the build.
// In STANDALONE_WASM we avoid the emscripten_memcpy_js dependency so keep
// the wasm file standalone.
// In BULK_MEMORY mode we include native versions of these functions based
// on memory.fill and memory.copy.
// In MAIN_MODULE=1 or EMCC_FORCE_STDLIBS mode all of libc is force included
// so we cannot override parts of it, and therefore cannot use libc_optz.
#if (SHRINK_LEVEL < 2 || LINKABLE || process.env.EMCC_FORCE_STDLIBS) && !STANDALONE_WASM && !BULK_MEMORY
#if MIN_CHROME_VERSION < 45 || MIN_EDGE_VERSION < 14 || MIN_FIREFOX_VERSION < 34 || MIN_IE_VERSION != TARGET_NOT_SUPPORTED || MIN_SAFARI_VERSION < 100101
// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/copyWithin lists browsers that support TypedArray.prototype.copyWithin, but it
// has outdated information for Safari, saying it would not support it.
// https://github.com/WebKit/webkit/commit/24a800eea4d82d6d595cdfec69d0f68e733b5c52#diff-c484911d8df319ba75fce0d8e7296333R1 suggests support was added on Aug 28, 2015.
// Manual testing suggests:
// Safari/601.1 Version/9.0 on iPhone 4s with iOS 9.3.6 (released September 30, 2015) does not support copyWithin.
// but the following systems do:
// AppleWebKit/602.2.14 Safari/602.1 Version/10.0 Mobile/14B100 iPhone OS 10_1_1 on iPhone 5s with iOS 10.1.1 (released October 31, 2016)
// AppleWebKit/603.3.8 Safari/602.1 Version/10.0 on iPhone 5 with iOS 10.3.4 (released July 22, 2019)
// AppleWebKit/605.1.15 iPhone OS 12_3_1 Version/12.1.1 Safari/604.1 on iPhone SE with iOS 12.3.1
// AppleWebKit/605.1.15 Safari/604.1 Version/13.0.4 iPhone OS 13_3 on iPhone 6s with iOS 13.3
// AppleWebKit/605.1.15 Version/13.0.3 Intel Mac OS X 10_15_1 on Safari 13.0.3 (15608.3.10.1.4) on macOS Catalina 10.15.1
// Hence the support status of .copyWithin() for Safari version range [10.0.0, 10.1.0] is unknown.
emscripten_memcpy_js: `= Uint8Array.prototype.copyWithin
? (dest, src, num) => HEAPU8.copyWithin(dest, src, src + num)
: (dest, src, num) => HEAPU8.set(HEAPU8.subarray(src, src+num), dest)`,
#else
emscripten_memcpy_js: (dest, src, num) => HEAPU8.copyWithin(dest, src, src + num),
#endif
#endif
// ==========================================================================
// assert.h
// ==========================================================================
__assert_fail: (condition, filename, line, func) => {
abort(`Assertion failed: ${UTF8ToString(condition)}, at: ` + [filename ? UTF8ToString(filename) : 'unknown filename', line, func ? UTF8ToString(func) : 'unknown function']);
},
// ==========================================================================
// time.h
// ==========================================================================
_mktime_js__i53abi: true,
_mktime_js__deps: ['$ydayFromDate'],
_mktime_js: (tmPtr) => {
var date = new Date({{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_year, 'i32') }}} + 1900,
{{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_mon, 'i32') }}},
{{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_mday, 'i32') }}},
{{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_hour, 'i32') }}},
{{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_min, 'i32') }}},
{{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_sec, 'i32') }}},
0);
// There's an ambiguous hour when the time goes back; the tm_isdst field is
// used to disambiguate it. Date() basically guesses, so we fix it up if it
// guessed wrong, or fill in tm_isdst with the guess if it's -1.
var dst = {{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_isdst, 'i32') }}};
var guessedOffset = date.getTimezoneOffset();
var start = new Date(date.getFullYear(), 0, 1);
var summerOffset = new Date(date.getFullYear(), 6, 1).getTimezoneOffset();
var winterOffset = start.getTimezoneOffset();
var dstOffset = Math.min(winterOffset, summerOffset); // DST is in December in South
if (dst < 0) {
// Attention: some regions don't have DST at all.
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_isdst, 'Number(summerOffset != winterOffset && dstOffset == guessedOffset)', 'i32') }}};
} else if ((dst > 0) != (dstOffset == guessedOffset)) {
var nonDstOffset = Math.max(winterOffset, summerOffset);
var trueOffset = dst > 0 ? dstOffset : nonDstOffset;
// Don't try setMinutes(date.getMinutes() + ...) -- it's messed up.
date.setTime(date.getTime() + (trueOffset - guessedOffset)*60000);
}
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_wday, 'date.getDay()', 'i32') }}};
var yday = ydayFromDate(date)|0;
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_yday, 'yday', 'i32') }}};
// To match expected behavior, update fields from date
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_sec, 'date.getSeconds()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_min, 'date.getMinutes()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_hour, 'date.getHours()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_mday, 'date.getDate()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_mon, 'date.getMonth()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_year, 'date.getYear()', 'i32') }}};
return date.getTime() / 1000;
},
_gmtime_js__i53abi: true,
_gmtime_js: (time, tmPtr) => {
var date = new Date(time * 1000);
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_sec, 'date.getUTCSeconds()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_min, 'date.getUTCMinutes()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_hour, 'date.getUTCHours()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_mday, 'date.getUTCDate()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_mon, 'date.getUTCMonth()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_year, 'date.getUTCFullYear()-1900', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_wday, 'date.getUTCDay()', 'i32') }}};
var start = Date.UTC(date.getUTCFullYear(), 0, 1, 0, 0, 0, 0);
var yday = ((date.getTime() - start) / (1000 * 60 * 60 * 24))|0;
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_yday, 'yday', 'i32') }}};
},
_timegm_js__i53abi: true,
_timegm_js: (tmPtr) => {
var time = Date.UTC({{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_year, 'i32') }}} + 1900,
{{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_mon, 'i32') }}},
{{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_mday, 'i32') }}},
{{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_hour, 'i32') }}},
{{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_min, 'i32') }}},
{{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_sec, 'i32') }}},
0);
var date = new Date(time);
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_wday, 'date.getUTCDay()', 'i32') }}};
var start = Date.UTC(date.getUTCFullYear(), 0, 1, 0, 0, 0, 0);
var yday = ((date.getTime() - start) / (1000 * 60 * 60 * 24))|0;
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_yday, 'yday', 'i32') }}};
return date.getTime() / 1000;
},
_localtime_js__i53abi: true,
_localtime_js__deps: ['$ydayFromDate'],
_localtime_js: (time, tmPtr) => {
var date = new Date(time*1000);
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_sec, 'date.getSeconds()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_min, 'date.getMinutes()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_hour, 'date.getHours()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_mday, 'date.getDate()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_mon, 'date.getMonth()', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_year, 'date.getFullYear()-1900', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_wday, 'date.getDay()', 'i32') }}};
var yday = ydayFromDate(date)|0;
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_yday, 'yday', 'i32') }}};
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_gmtoff, '-(date.getTimezoneOffset() * 60)', 'i32') }}};
// Attention: DST is in December in South, and some regions don't have DST at all.
var start = new Date(date.getFullYear(), 0, 1);
var summerOffset = new Date(date.getFullYear(), 6, 1).getTimezoneOffset();
var winterOffset = start.getTimezoneOffset();
var dst = (summerOffset != winterOffset && date.getTimezoneOffset() == Math.min(winterOffset, summerOffset))|0;
{{{ makeSetValue('tmPtr', C_STRUCTS.tm.tm_isdst, 'dst', 'i32') }}};
},
// musl-internal function used to implement both `asctime` and `asctime_r`
__asctime_r: (tmPtr, buf) => {
var date = {
tm_sec: {{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_sec, 'i32') }}},
tm_min: {{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_min, 'i32') }}},
tm_hour: {{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_hour, 'i32') }}},
tm_mday: {{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_mday, 'i32') }}},
tm_mon: {{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_mon, 'i32') }}},
tm_year: {{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_year, 'i32') }}},
tm_wday: {{{ makeGetValue('tmPtr', C_STRUCTS.tm.tm_wday, 'i32') }}}
};
var days = [ "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" ];
var months = [ "Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec" ];
var s = days[date.tm_wday] + ' ' + months[date.tm_mon] +
(date.tm_mday < 10 ? ' ' : ' ') + date.tm_mday +
(date.tm_hour < 10 ? ' 0' : ' ') + date.tm_hour +
(date.tm_min < 10 ? ':0' : ':') + date.tm_min +
(date.tm_sec < 10 ? ':0' : ':') + date.tm_sec +
' ' + (1900 + date.tm_year) + "\n";
// asctime_r is specced to behave in an undefined manner if the algorithm would attempt
// to write out more than 26 bytes (including the null terminator).
// See http://pubs.opengroup.org/onlinepubs/9699919799/functions/asctime.html
// Our undefined behavior is to truncate the write to at most 26 bytes, including null terminator.
stringToUTF8(s, buf, 26);
return buf;
},
#if STACK_OVERFLOW_CHECK >= 2
// Set stack limits used by binaryen's `StackCheck` pass.
#if MAIN_MODULE
$setStackLimits__deps: ['$setDylinkStackLimits'],
#endif
$setStackLimits: () => {
var stackLow = _emscripten_stack_get_base();
var stackHigh = _emscripten_stack_get_end();
#if RUNTIME_DEBUG
dbg(`setStackLimits: ${ptrToString(stackLow)}, ${ptrToString(stackHigh)}`);
#endif
#if MAIN_MODULE
// With dynamic linking we could have any number of pre-loaded libraries
// that each need to have their stack limits set.
setDylinkStackLimits(stackLow, stackHigh);
#else
___set_stack_limits(stackLow, stackHigh);
#endif
},
#endif
$withStackSave__internal: true,
$withStackSave: (f) => {
var stack = stackSave();
var ret = f();
stackRestore(stack);
return ret;
},
_tzset_js__deps: ['$stringToNewUTF8'],
_tzset_js__internal: true,
_tzset_js: (timezone, daylight, tzname) => {
// TODO: Use (malleable) environment variables instead of system settings.
var currentYear = new Date().getFullYear();
var winter = new Date(currentYear, 0, 1);
var summer = new Date(currentYear, 6, 1);
var winterOffset = winter.getTimezoneOffset();
var summerOffset = summer.getTimezoneOffset();
// Local standard timezone offset. Local standard time is not adjusted for daylight savings.
// This code uses the fact that getTimezoneOffset returns a greater value during Standard Time versus Daylight Saving Time (DST).
// Thus it determines the expected output during Standard Time, and it compares whether the output of the given date the same (Standard) or less (DST).
var stdTimezoneOffset = Math.max(winterOffset, summerOffset);
// timezone is specified as seconds west of UTC ("The external variable
// `timezone` shall be set to the difference, in seconds, between
// Coordinated Universal Time (UTC) and local standard time."), the same
// as returned by stdTimezoneOffset.
// See http://pubs.opengroup.org/onlinepubs/009695399/functions/tzset.html
{{{ makeSetValue('timezone', '0', 'stdTimezoneOffset * 60', POINTER_TYPE) }}};
{{{ makeSetValue('daylight', '0', 'Number(winterOffset != summerOffset)', 'i32') }}};
function extractZone(date) {
var match = date.toTimeString().match(/\(([A-Za-z ]+)\)$/);
return match ? match[1] : "GMT";
};
var winterName = extractZone(winter);
var summerName = extractZone(summer);
var winterNamePtr = stringToNewUTF8(winterName);
var summerNamePtr = stringToNewUTF8(summerName);
if (summerOffset < winterOffset) {
// Northern hemisphere
{{{ makeSetValue('tzname', '0', 'winterNamePtr', POINTER_TYPE) }}};
{{{ makeSetValue('tzname', POINTER_SIZE, 'summerNamePtr', POINTER_TYPE) }}};
} else {
{{{ makeSetValue('tzname', '0', 'summerNamePtr', POINTER_TYPE) }}};
{{{ makeSetValue('tzname', POINTER_SIZE, 'winterNamePtr', POINTER_TYPE) }}};
}
},
$MONTH_DAYS_REGULAR: [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],
$MONTH_DAYS_LEAP: [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31],
$MONTH_DAYS_REGULAR_CUMULATIVE: [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334],
$MONTH_DAYS_LEAP_CUMULATIVE: [0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335],
$isLeapYear: (year) => {
return year%4 === 0 && (year%100 !== 0 || year%400 === 0);
},
$ydayFromDate__deps: ['$isLeapYear', '$MONTH_DAYS_LEAP_CUMULATIVE', '$MONTH_DAYS_REGULAR_CUMULATIVE'],
$ydayFromDate: (date) => {
var leap = isLeapYear(date.getFullYear());
var monthDaysCumulative = (leap ? MONTH_DAYS_LEAP_CUMULATIVE : MONTH_DAYS_REGULAR_CUMULATIVE);
var yday = monthDaysCumulative[date.getMonth()] + date.getDate() - 1; // -1 since it's days since Jan 1
return yday;
},
$arraySum: (array, index) => {
var sum = 0;
for (var i = 0; i <= index; sum += array[i++]) {
// no-op
}
return sum;
},
$addDays__deps: ['$isLeapYear', '$MONTH_DAYS_LEAP', '$MONTH_DAYS_REGULAR'],
$addDays: (date, days) => {
var newDate = new Date(date.getTime());
while (days > 0) {
var leap = isLeapYear(newDate.getFullYear());
var currentMonth = newDate.getMonth();
var daysInCurrentMonth = (leap ? MONTH_DAYS_LEAP : MONTH_DAYS_REGULAR)[currentMonth];
if (days > daysInCurrentMonth-newDate.getDate()) {
// we spill over to next month
days -= (daysInCurrentMonth-newDate.getDate()+1);
newDate.setDate(1);
if (currentMonth < 11) {
newDate.setMonth(currentMonth+1)
} else {
newDate.setMonth(0);
newDate.setFullYear(newDate.getFullYear()+1);
}
} else {
// we stay in current month
newDate.setDate(newDate.getDate()+days);
return newDate;
}
}
return newDate;
},
// Note: this is not used in STANDALONE_WASM mode, because it is more
// compact to do it in JS.
strftime__deps: ['$isLeapYear', '$arraySum', '$addDays', '$MONTH_DAYS_REGULAR', '$MONTH_DAYS_LEAP',
'$intArrayFromString', '$writeArrayToMemory'
],
strftime: (s, maxsize, format, tm) => {
// size_t strftime(char *restrict s, size_t maxsize, const char *restrict format, const struct tm *restrict timeptr);
// http://pubs.opengroup.org/onlinepubs/009695399/functions/strftime.html
var tm_zone = {{{ makeGetValue('tm', C_STRUCTS.tm.tm_zone, '*') }}};
var date = {
tm_sec: {{{ makeGetValue('tm', C_STRUCTS.tm.tm_sec, 'i32') }}},
tm_min: {{{ makeGetValue('tm', C_STRUCTS.tm.tm_min, 'i32') }}},
tm_hour: {{{ makeGetValue('tm', C_STRUCTS.tm.tm_hour, 'i32') }}},
tm_mday: {{{ makeGetValue('tm', C_STRUCTS.tm.tm_mday, 'i32') }}},
tm_mon: {{{ makeGetValue('tm', C_STRUCTS.tm.tm_mon, 'i32') }}},
tm_year: {{{ makeGetValue('tm', C_STRUCTS.tm.tm_year, 'i32') }}},
tm_wday: {{{ makeGetValue('tm', C_STRUCTS.tm.tm_wday, 'i32') }}},
tm_yday: {{{ makeGetValue('tm', C_STRUCTS.tm.tm_yday, 'i32') }}},
tm_isdst: {{{ makeGetValue('tm', C_STRUCTS.tm.tm_isdst, 'i32') }}},
tm_gmtoff: {{{ makeGetValue('tm', C_STRUCTS.tm.tm_gmtoff, 'i32') }}},
tm_zone: tm_zone ? UTF8ToString(tm_zone) : ''
};
var pattern = UTF8ToString(format);
// expand format
var EXPANSION_RULES_1 = {
'%c': '%a %b %d %H:%M:%S %Y', // Replaced by the locale's appropriate date and time representation - e.g., Mon Aug 3 14:02:01 2013
'%D': '%m/%d/%y', // Equivalent to %m / %d / %y
'%F': '%Y-%m-%d', // Equivalent to %Y - %m - %d
'%h': '%b', // Equivalent to %b
'%r': '%I:%M:%S %p', // Replaced by the time in a.m. and p.m. notation
'%R': '%H:%M', // Replaced by the time in 24-hour notation
'%T': '%H:%M:%S', // Replaced by the time
'%x': '%m/%d/%y', // Replaced by the locale's appropriate date representation
'%X': '%H:%M:%S', // Replaced by the locale's appropriate time representation
// Modified Conversion Specifiers
'%Ec': '%c', // Replaced by the locale's alternative appropriate date and time representation.
'%EC': '%C', // Replaced by the name of the base year (period) in the locale's alternative representation.
'%Ex': '%m/%d/%y', // Replaced by the locale's alternative date representation.
'%EX': '%H:%M:%S', // Replaced by the locale's alternative time representation.
'%Ey': '%y', // Replaced by the offset from %EC (year only) in the locale's alternative representation.
'%EY': '%Y', // Replaced by the full alternative year representation.
'%Od': '%d', // Replaced by the day of the month, using the locale's alternative numeric symbols, filled as needed with leading zeros if there is any alternative symbol for zero; otherwise, with leading <space> characters.
'%Oe': '%e', // Replaced by the day of the month, using the locale's alternative numeric symbols, filled as needed with leading <space> characters.
'%OH': '%H', // Replaced by the hour (24-hour clock) using the locale's alternative numeric symbols.
'%OI': '%I', // Replaced by the hour (12-hour clock) using the locale's alternative numeric symbols.
'%Om': '%m', // Replaced by the month using the locale's alternative numeric symbols.
'%OM': '%M', // Replaced by the minutes using the locale's alternative numeric symbols.
'%OS': '%S', // Replaced by the seconds using the locale's alternative numeric symbols.
'%Ou': '%u', // Replaced by the weekday as a number in the locale's alternative representation (Monday=1).
'%OU': '%U', // Replaced by the week number of the year (Sunday as the first day of the week, rules corresponding to %U ) using the locale's alternative numeric symbols.
'%OV': '%V', // Replaced by the week number of the year (Monday as the first day of the week, rules corresponding to %V ) using the locale's alternative numeric symbols.
'%Ow': '%w', // Replaced by the number of the weekday (Sunday=0) using the locale's alternative numeric symbols.
'%OW': '%W', // Replaced by the week number of the year (Monday as the first day of the week) using the locale's alternative numeric symbols.
'%Oy': '%y', // Replaced by the year (offset from %C ) using the locale's alternative numeric symbols.
};
for (var rule in EXPANSION_RULES_1) {
pattern = pattern.replace(new RegExp(rule, 'g'), EXPANSION_RULES_1[rule]);
}
var WEEKDAYS = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
var MONTHS = ['January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
function leadingSomething(value, digits, character) {
var str = typeof value == 'number' ? value.toString() : (value || '');
while (str.length < digits) {
str = character[0]+str;
}
return str;
}
function leadingNulls(value, digits) {
return leadingSomething(value, digits, '0');
}
function compareByDay(date1, date2) {
function sgn(value) {
return value < 0 ? -1 : (value > 0 ? 1 : 0);
}
var compare;
if ((compare = sgn(date1.getFullYear()-date2.getFullYear())) === 0) {
if ((compare = sgn(date1.getMonth()-date2.getMonth())) === 0) {
compare = sgn(date1.getDate()-date2.getDate());
}
}
return compare;
}
function getFirstWeekStartDate(janFourth) {
switch (janFourth.getDay()) {
case 0: // Sunday
return new Date(janFourth.getFullYear()-1, 11, 29);
case 1: // Monday
return janFourth;
case 2: // Tuesday
return new Date(janFourth.getFullYear(), 0, 3);
case 3: // Wednesday
return new Date(janFourth.getFullYear(), 0, 2);
case 4: // Thursday
return new Date(janFourth.getFullYear(), 0, 1);
case 5: // Friday
return new Date(janFourth.getFullYear()-1, 11, 31);
case 6: // Saturday
return new Date(janFourth.getFullYear()-1, 11, 30);
}
}
function getWeekBasedYear(date) {
var thisDate = addDays(new Date(date.tm_year+1900, 0, 1), date.tm_yday);
var janFourthThisYear = new Date(thisDate.getFullYear(), 0, 4);
var janFourthNextYear = new Date(thisDate.getFullYear()+1, 0, 4);
var firstWeekStartThisYear = getFirstWeekStartDate(janFourthThisYear);
var firstWeekStartNextYear = getFirstWeekStartDate(janFourthNextYear);
if (compareByDay(firstWeekStartThisYear, thisDate) <= 0) {
// this date is after the start of the first week of this year
if (compareByDay(firstWeekStartNextYear, thisDate) <= 0) {
return thisDate.getFullYear()+1;
}
return thisDate.getFullYear();
}
return thisDate.getFullYear()-1;
}
var EXPANSION_RULES_2 = {
'%a': (date) => WEEKDAYS[date.tm_wday].substring(0,3) ,
'%A': (date) => WEEKDAYS[date.tm_wday],
'%b': (date) => MONTHS[date.tm_mon].substring(0,3),
'%B': (date) => MONTHS[date.tm_mon],
'%C': (date) => {
var year = date.tm_year+1900;
return leadingNulls((year/100)|0,2);
},
'%d': (date) => leadingNulls(date.tm_mday, 2),
'%e': (date) => leadingSomething(date.tm_mday, 2, ' '),
'%g': (date) => {
// %g, %G, and %V give values according to the ISO 8601:2000 standard week-based year.
// In this system, weeks begin on a Monday and week 1 of the year is the week that includes
// January 4th, which is also the week that includes the first Thursday of the year, and
// is also the first week that contains at least four days in the year.
// If the first Monday of January is the 2nd, 3rd, or 4th, the preceding days are part of
// the last week of the preceding year; thus, for Saturday 2nd January 1999,
// %G is replaced by 1998 and %V is replaced by 53. If December 29th, 30th,
// or 31st is a Monday, it and any following days are part of week 1 of the following year.
// Thus, for Tuesday 30th December 1997, %G is replaced by 1998 and %V is replaced by 01.
return getWeekBasedYear(date).toString().substring(2);
},
'%G': (date) => getWeekBasedYear(date),
'%H': (date) => leadingNulls(date.tm_hour, 2),
'%I': (date) => {
var twelveHour = date.tm_hour;
if (twelveHour == 0) twelveHour = 12;
else if (twelveHour > 12) twelveHour -= 12;
return leadingNulls(twelveHour, 2);
},
'%j': (date) => {
// Day of the year (001-366)
return leadingNulls(date.tm_mday + arraySum(isLeapYear(date.tm_year+1900) ? MONTH_DAYS_LEAP : MONTH_DAYS_REGULAR, date.tm_mon-1), 3);
},
'%m': (date) => leadingNulls(date.tm_mon+1, 2),
'%M': (date) => leadingNulls(date.tm_min, 2),
'%n': () => '\n',
'%p': (date) => {
if (date.tm_hour >= 0 && date.tm_hour < 12) {
return 'AM';
}
return 'PM';
},
'%S': (date) => leadingNulls(date.tm_sec, 2),
'%t': () => '\t',
'%u': (date) => date.tm_wday || 7,
'%U': (date) => {
var days = date.tm_yday + 7 - date.tm_wday;
return leadingNulls(Math.floor(days / 7), 2);
},
'%V': (date) => {
// Replaced by the week number of the year (Monday as the first day of the week)
// as a decimal number [01,53]. If the week containing 1 January has four
// or more days in the new year, then it is considered week 1.
// Otherwise, it is the last week of the previous year, and the next week is week 1.
// Both January 4th and the first Thursday of January are always in week 1. [ tm_year, tm_wday, tm_yday]
var val = Math.floor((date.tm_yday + 7 - (date.tm_wday + 6) % 7 ) / 7);
// If 1 Jan is just 1-3 days past Monday, the previous week
// is also in this year.
if ((date.tm_wday + 371 - date.tm_yday - 2) % 7 <= 2) {
val++;
}
if (!val) {
val = 52;
// If 31 December of prev year a Thursday, or Friday of a
// leap year, then the prev year has 53 weeks.
var dec31 = (date.tm_wday + 7 - date.tm_yday - 1) % 7;
if (dec31 == 4 || (dec31 == 5 && isLeapYear(date.tm_year%400-1))) {
val++;
}
} else if (val == 53) {
// If 1 January is not a Thursday, and not a Wednesday of a
// leap year, then this year has only 52 weeks.
var jan1 = (date.tm_wday + 371 - date.tm_yday) % 7;
if (jan1 != 4 && (jan1 != 3 || !isLeapYear(date.tm_year)))
val = 1;
}
return leadingNulls(val, 2);
},
'%w': (date) => date.tm_wday,
'%W': (date) => {
var days = date.tm_yday + 7 - ((date.tm_wday + 6) % 7);
return leadingNulls(Math.floor(days / 7), 2);
},
'%y': (date) => {
// Replaced by the last two digits of the year as a decimal number [00,99]. [ tm_year]
return (date.tm_year+1900).toString().substring(2);
},
// Replaced by the year as a decimal number (for example, 1997). [ tm_year]
'%Y': (date) => date.tm_year+1900,
'%z': (date) => {
// Replaced by the offset from UTC in the ISO 8601:2000 standard format ( +hhmm or -hhmm ).
// For example, "-0430" means 4 hours 30 minutes behind UTC (west of Greenwich).
var off = date.tm_gmtoff;
var ahead = off >= 0;
off = Math.abs(off) / 60;
// convert from minutes into hhmm format (which means 60 minutes = 100 units)
off = (off / 60)*100 + (off % 60);
return (ahead ? '+' : '-') + String("0000" + off).slice(-4);
},
'%Z': (date) => date.tm_zone,
'%%': () => '%'
};
// Replace %% with a pair of NULLs (which cannot occur in a C string), then
// re-inject them after processing.
pattern = pattern.replace(/%%/g, '\0\0')
for (var rule in EXPANSION_RULES_2) {
if (pattern.includes(rule)) {
pattern = pattern.replace(new RegExp(rule, 'g'), EXPANSION_RULES_2[rule](date));
}
}
pattern = pattern.replace(/\0\0/g, '%')
var bytes = intArrayFromString(pattern, false);
if (bytes.length > maxsize) {
return 0;
}
writeArrayToMemory(bytes, s);
return bytes.length-1;
},
strftime_l__deps: ['strftime'],
strftime_l: (s, maxsize, format, tm, loc) => {
return _strftime(s, maxsize, format, tm); // no locale support yet
},
strptime__deps: ['$isLeapYear', '$arraySum', '$addDays', '$MONTH_DAYS_REGULAR', '$MONTH_DAYS_LEAP',
'$jstoi_q', '$intArrayFromString' ],
strptime: (buf, format, tm) => {
// char *strptime(const char *restrict buf, const char *restrict format, struct tm *restrict tm);
// http://pubs.opengroup.org/onlinepubs/009695399/functions/strptime.html
var pattern = UTF8ToString(format);
// escape special characters
// TODO: not sure we really need to escape all of these in JS regexps
var SPECIAL_CHARS = '\\!@#$^&*()+=-[]/{}|:<>?,.';
for (var i=0, ii=SPECIAL_CHARS.length; i<ii; ++i) {
pattern = pattern.replace(new RegExp('\\'+SPECIAL_CHARS[i], 'g'), '\\'+SPECIAL_CHARS[i]);
}
// reduce number of matchers
var EQUIVALENT_MATCHERS = {
'%A': '%a',
'%B': '%b',
'%c': '%a %b %d %H:%M:%S %Y',
'%D': '%m\\/%d\\/%y',
'%e': '%d',
'%F': '%Y-%m-%d',
'%h': '%b',
'%R': '%H\\:%M',
'%r': '%I\\:%M\\:%S\\s%p',
'%T': '%H\\:%M\\:%S',
'%x': '%m\\/%d\\/(?:%y|%Y)',
'%X': '%H\\:%M\\:%S'
};
for (var matcher in EQUIVALENT_MATCHERS) {
pattern = pattern.replace(matcher, EQUIVALENT_MATCHERS[matcher]);
}
// TODO: take care of locale
var DATE_PATTERNS = {
/* weeday name */ '%a': '(?:Sun(?:day)?)|(?:Mon(?:day)?)|(?:Tue(?:sday)?)|(?:Wed(?:nesday)?)|(?:Thu(?:rsday)?)|(?:Fri(?:day)?)|(?:Sat(?:urday)?)',
/* month name */ '%b': '(?:Jan(?:uary)?)|(?:Feb(?:ruary)?)|(?:Mar(?:ch)?)|(?:Apr(?:il)?)|May|(?:Jun(?:e)?)|(?:Jul(?:y)?)|(?:Aug(?:ust)?)|(?:Sep(?:tember)?)|(?:Oct(?:ober)?)|(?:Nov(?:ember)?)|(?:Dec(?:ember)?)',
/* century */ '%C': '\\d\\d',
/* day of month */ '%d': '0[1-9]|[1-9](?!\\d)|1\\d|2\\d|30|31',
/* hour (24hr) */ '%H': '\\d(?!\\d)|[0,1]\\d|20|21|22|23',
/* hour (12hr) */ '%I': '\\d(?!\\d)|0\\d|10|11|12',
/* day of year */ '%j': '00[1-9]|0?[1-9](?!\\d)|0?[1-9]\\d(?!\\d)|[1,2]\\d\\d|3[0-6]\\d',
/* month */ '%m': '0[1-9]|[1-9](?!\\d)|10|11|12',
/* minutes */ '%M': '0\\d|\\d(?!\\d)|[1-5]\\d',
/* whitespace */ '%n': '\\s',
/* AM/PM */ '%p': 'AM|am|PM|pm|A\\.M\\.|a\\.m\\.|P\\.M\\.|p\\.m\\.',
/* seconds */ '%S': '0\\d|\\d(?!\\d)|[1-5]\\d|60',
/* week number */ '%U': '0\\d|\\d(?!\\d)|[1-4]\\d|50|51|52|53',
/* week number */ '%W': '0\\d|\\d(?!\\d)|[1-4]\\d|50|51|52|53',
/* weekday number */ '%w': '[0-6]',
/* 2-digit year */ '%y': '\\d\\d',
/* 4-digit year */ '%Y': '\\d\\d\\d\\d',
/* % */ '%%': '%',
/* whitespace */ '%t': '\\s',
};
var MONTH_NUMBERS = {JAN: 0, FEB: 1, MAR: 2, APR: 3, MAY: 4, JUN: 5, JUL: 6, AUG: 7, SEP: 8, OCT: 9, NOV: 10, DEC: 11};
var DAY_NUMBERS_SUN_FIRST = {SUN: 0, MON: 1, TUE: 2, WED: 3, THU: 4, FRI: 5, SAT: 6};
var DAY_NUMBERS_MON_FIRST = {MON: 0, TUE: 1, WED: 2, THU: 3, FRI: 4, SAT: 5, SUN: 6};
for (var datePattern in DATE_PATTERNS) {
pattern = pattern.replace(datePattern, '('+datePattern+DATE_PATTERNS[datePattern]+')');
}
// take care of capturing groups
var capture = [];
for (var i=pattern.indexOf('%'); i>=0; i=pattern.indexOf('%')) {
capture.push(pattern[i+1]);
pattern = pattern.replace(new RegExp('\\%'+pattern[i+1], 'g'), '');
}
var matches = new RegExp('^'+pattern, "i").exec(UTF8ToString(buf))
// out(UTF8ToString(buf)+ ' is matched by '+((new RegExp('^'+pattern)).source)+' into: '+JSON.stringify(matches));
function initDate() {
function fixup(value, min, max) {
return (typeof value != 'number' || isNaN(value)) ? min : (value>=min ? (value<=max ? value: max): min);
};
return {
year: fixup({{{ makeGetValue('tm', C_STRUCTS.tm.tm_year, 'i32') }}} + 1900 , 1970, 9999),
month: fixup({{{ makeGetValue('tm', C_STRUCTS.tm.tm_mon, 'i32') }}}, 0, 11),
day: fixup({{{ makeGetValue('tm', C_STRUCTS.tm.tm_mday, 'i32') }}}, 1, 31),
hour: fixup({{{ makeGetValue('tm', C_STRUCTS.tm.tm_hour, 'i32') }}}, 0, 23),
min: fixup({{{ makeGetValue('tm', C_STRUCTS.tm.tm_min, 'i32') }}}, 0, 59),
sec: fixup({{{ makeGetValue('tm', C_STRUCTS.tm.tm_sec, 'i32') }}}, 0, 59)
};
};
if (matches) {
var date = initDate();
var value;
var getMatch = (symbol) => {
var pos = capture.indexOf(symbol);
// check if symbol appears in regexp
if (pos >= 0) {
// return matched value or null (falsy!) for non-matches
return matches[pos+1];
}
return;
};
// seconds
if ((value=getMatch('S'))) {
date.sec = jstoi_q(value);
}
// minutes
if ((value=getMatch('M'))) {
date.min = jstoi_q(value);
}
// hours
if ((value=getMatch('H'))) {
// 24h clock
date.hour = jstoi_q(value);
} else if ((value = getMatch('I'))) {
// AM/PM clock
var hour = jstoi_q(value);
if ((value=getMatch('p'))) {
hour += value.toUpperCase()[0] === 'P' ? 12 : 0;
}
date.hour = hour;
}
// year
if ((value=getMatch('Y'))) {
// parse from four-digit year
date.year = jstoi_q(value);
} else if ((value=getMatch('y'))) {
// parse from two-digit year...
var year = jstoi_q(value);
if ((value=getMatch('C'))) {
// ...and century
year += jstoi_q(value)*100;
} else {
// ...and rule-of-thumb
year += year<69 ? 2000 : 1900;
}
date.year = year;
}
// month
if ((value=getMatch('m'))) {
// parse from month number
date.month = jstoi_q(value)-1;
} else if ((value=getMatch('b'))) {
// parse from month name
date.month = MONTH_NUMBERS[value.substring(0,3).toUpperCase()] || 0;
// TODO: derive month from day in year+year, week number+day of week+year
}
// day
if ((value=getMatch('d'))) {
// get day of month directly
date.day = jstoi_q(value);
} else if ((value=getMatch('j'))) {
// get day of month from day of year ...
var day = jstoi_q(value);
var leapYear = isLeapYear(date.year);
for (var month=0; month<12; ++month) {
var daysUntilMonth = arraySum(leapYear ? MONTH_DAYS_LEAP : MONTH_DAYS_REGULAR, month-1);
if (day<=daysUntilMonth+(leapYear ? MONTH_DAYS_LEAP : MONTH_DAYS_REGULAR)[month]) {
date.day = day-daysUntilMonth;
}
}
} else if ((value=getMatch('a'))) {
// get day of month from weekday ...
var weekDay = value.substring(0,3).toUpperCase();
if ((value=getMatch('U'))) {
// ... and week number (Sunday being first day of week)
// Week number of the year (Sunday as the first day of the week) as a decimal number [00,53].
// All days in a new year preceding the first Sunday are considered to be in week 0.
var weekDayNumber = DAY_NUMBERS_SUN_FIRST[weekDay];
var weekNumber = jstoi_q(value);
// January 1st
var janFirst = new Date(date.year, 0, 1);
var endDate;
if (janFirst.getDay() === 0) {
// Jan 1st is a Sunday, and, hence in the 1st CW
endDate = addDays(janFirst, weekDayNumber+7*(weekNumber-1));
} else {
// Jan 1st is not a Sunday, and, hence still in the 0th CW
endDate = addDays(janFirst, 7-janFirst.getDay()+weekDayNumber+7*(weekNumber-1));
}
date.day = endDate.getDate();
date.month = endDate.getMonth();
} else if ((value=getMatch('W'))) {
// ... and week number (Monday being first day of week)
// Week number of the year (Monday as the first day of the week) as a decimal number [00,53].
// All days in a new year preceding the first Monday are considered to be in week 0.
var weekDayNumber = DAY_NUMBERS_MON_FIRST[weekDay];
var weekNumber = jstoi_q(value);
// January 1st
var janFirst = new Date(date.year, 0, 1);
var endDate;
if (janFirst.getDay()===1) {
// Jan 1st is a Monday, and, hence in the 1st CW
endDate = addDays(janFirst, weekDayNumber+7*(weekNumber-1));
} else {
// Jan 1st is not a Monday, and, hence still in the 0th CW
endDate = addDays(janFirst, 7-janFirst.getDay()+1+weekDayNumber+7*(weekNumber-1));
}
date.day = endDate.getDate();
date.month = endDate.getMonth();
}
}
/*
tm_sec int seconds after the minute 0-61*
tm_min int minutes after the hour 0-59
tm_hour int hours since midnight 0-23
tm_mday int day of the month 1-31
tm_mon int months since January 0-11
tm_year int years since 1900
tm_wday int days since Sunday 0-6
tm_yday int days since January 1 0-365
tm_isdst int Daylight Saving Time flag
*/
var fullDate = new Date(date.year, date.month, date.day, date.hour, date.min, date.sec, 0);
{{{ makeSetValue('tm', C_STRUCTS.tm.tm_sec, 'fullDate.getSeconds()', 'i32') }}};
{{{ makeSetValue('tm', C_STRUCTS.tm.tm_min, 'fullDate.getMinutes()', 'i32') }}};
{{{ makeSetValue('tm', C_STRUCTS.tm.tm_hour, 'fullDate.getHours()', 'i32') }}};
{{{ makeSetValue('tm', C_STRUCTS.tm.tm_mday, 'fullDate.getDate()', 'i32') }}};
{{{ makeSetValue('tm', C_STRUCTS.tm.tm_mon, 'fullDate.getMonth()', 'i32') }}};
{{{ makeSetValue('tm', C_STRUCTS.tm.tm_year, 'fullDate.getFullYear()-1900', 'i32') }}};
{{{ makeSetValue('tm', C_STRUCTS.tm.tm_wday, 'fullDate.getDay()', 'i32') }}};
{{{ makeSetValue('tm', C_STRUCTS.tm.tm_yday, 'arraySum(isLeapYear(fullDate.getFullYear()) ? MONTH_DAYS_LEAP : MONTH_DAYS_REGULAR, fullDate.getMonth()-1)+fullDate.getDate()-1', 'i32') }}};
{{{ makeSetValue('tm', C_STRUCTS.tm.tm_isdst, '0', 'i32') }}};
// we need to convert the matched sequence into an integer array to take care of UTF-8 characters > 0x7F
// TODO: not sure that intArrayFromString handles all unicode characters correctly
return buf+intArrayFromString(matches[0]).length-1;
}
return 0;
},
strptime_l__deps: ['strptime'],
strptime_l: (buf, format, tm, locale) => {
return _strptime(buf, format, tm); // no locale support yet
},
// ==========================================================================
// setjmp.h
// ==========================================================================
#if SUPPORT_LONGJMP == 'emscripten'
// In WebAssemblyLowerEmscriptenEHSjLj pass in the LLVM backend, function
// calls that exist in the same function with setjmp are converted to a code
// sequence that includes invokes, malloc, free, saveSetjmp, and
// emscripten_longjmp. setThrew is called from invokes, but we don't have
// any way to express that dependency so we use emscripten_throw_longjmp as
// a proxy and declare the dependency here.
_emscripten_throw_longjmp__deps: ['setThrew'],
_emscripten_throw_longjmp: () => {
#if EXCEPTION_STACK_TRACES
throw new EmscriptenSjLj;
#else
throw Infinity;
#endif
},
#elif !SUPPORT_LONGJMP
#if !INCLUDE_FULL_LIBRARY
// These are in order to print helpful error messages when either longjmp of
// setjmp is used.
longjmp__deps: [() => {
error('longjmp support was disabled (SUPPORT_LONGJMP=0), but it is required by the code (either set SUPPORT_LONGJMP=1, or remove uses of it in the project)');
}],
get setjmp__deps() {
return this.longjmp__deps;
},
// This is to print the correct error message when a program is built with
// SUPPORT_LONGJMP=1 but linked with SUPPORT_LONGJMP=0. When a program is
// built with SUPPORT_LONGJMP=1, the object file contains references of not
// longjmp but _emscripten_throw_longjmp, which is called from
// emscripten_longjmp.
get _emscripten_throw_longjmp__deps() {
return this.longjmp__deps;
},
#endif
_emscripten_throw_longjmp: () => {
error('longjmp support was disabled (SUPPORT_LONGJMP=0), but it is required by the code (either set SUPPORT_LONGJMP=1, or remove uses of it in the project)');
},
// will never be emitted, as the dep errors at compile time
longjmp: (env, value) => {
abort('longjmp not supported (build with -s SUPPORT_LONGJMP)');
},
setjmp: (env) => {
abort('setjmp not supported (build with -s SUPPORT_LONGJMP)');
},
#endif
// ==========================================================================
// errno.h
// ==========================================================================
$ERRNO_CODES__postset: `ERRNO_CODES = {
'EPERM': {{{ cDefs.EPERM }}},
'ENOENT': {{{ cDefs.ENOENT }}},
'ESRCH': {{{ cDefs.ESRCH }}},
'EINTR': {{{ cDefs.EINTR }}},
'EIO': {{{ cDefs.EIO }}},
'ENXIO': {{{ cDefs.ENXIO }}},
'E2BIG': {{{ cDefs.E2BIG }}},
'ENOEXEC': {{{ cDefs.ENOEXEC }}},
'EBADF': {{{ cDefs.EBADF }}},
'ECHILD': {{{ cDefs.ECHILD }}},
'EAGAIN': {{{ cDefs.EAGAIN }}},
'EWOULDBLOCK': {{{ cDefs.EWOULDBLOCK }}},
'ENOMEM': {{{ cDefs.ENOMEM }}},
'EACCES': {{{ cDefs.EACCES }}},
'EFAULT': {{{ cDefs.EFAULT }}},
'ENOTBLK': {{{ cDefs.ENOTBLK }}},
'EBUSY': {{{ cDefs.EBUSY }}},
'EEXIST': {{{ cDefs.EEXIST }}},
'EXDEV': {{{ cDefs.EXDEV }}},
'ENODEV': {{{ cDefs.ENODEV }}},
'ENOTDIR': {{{ cDefs.ENOTDIR }}},
'EISDIR': {{{ cDefs.EISDIR }}},
'EINVAL': {{{ cDefs.EINVAL }}},
'ENFILE': {{{ cDefs.ENFILE }}},
'EMFILE': {{{ cDefs.EMFILE }}},
'ENOTTY': {{{ cDefs.ENOTTY }}},
'ETXTBSY': {{{ cDefs.ETXTBSY }}},
'EFBIG': {{{ cDefs.EFBIG }}},
'ENOSPC': {{{ cDefs.ENOSPC }}},
'ESPIPE': {{{ cDefs.ESPIPE }}},
'EROFS': {{{ cDefs.EROFS }}},
'EMLINK': {{{ cDefs.EMLINK }}},
'EPIPE': {{{ cDefs.EPIPE }}},
'EDOM': {{{ cDefs.EDOM }}},
'ERANGE': {{{ cDefs.ERANGE }}},
'ENOMSG': {{{ cDefs.ENOMSG }}},
'EIDRM': {{{ cDefs.EIDRM }}},
'ECHRNG': {{{ cDefs.ECHRNG }}},
'EL2NSYNC': {{{ cDefs.EL2NSYNC }}},
'EL3HLT': {{{ cDefs.EL3HLT }}},
'EL3RST': {{{ cDefs.EL3RST }}},
'ELNRNG': {{{ cDefs.ELNRNG }}},
'EUNATCH': {{{ cDefs.EUNATCH }}},
'ENOCSI': {{{ cDefs.ENOCSI }}},
'EL2HLT': {{{ cDefs.EL2HLT }}},
'EDEADLK': {{{ cDefs.EDEADLK }}},
'ENOLCK': {{{ cDefs.ENOLCK }}},
'EBADE': {{{ cDefs.EBADE }}},
'EBADR': {{{ cDefs.EBADR }}},
'EXFULL': {{{ cDefs.EXFULL }}},
'ENOANO': {{{ cDefs.ENOANO }}},
'EBADRQC': {{{ cDefs.EBADRQC }}},
'EBADSLT': {{{ cDefs.EBADSLT }}},
'EDEADLOCK': {{{ cDefs.EDEADLOCK }}},
'EBFONT': {{{ cDefs.EBFONT }}},
'ENOSTR': {{{ cDefs.ENOSTR }}},
'ENODATA': {{{ cDefs.ENODATA }}},
'ETIME': {{{ cDefs.ETIME }}},
'ENOSR': {{{ cDefs.ENOSR }}},
'ENONET': {{{ cDefs.ENONET }}},
'ENOPKG': {{{ cDefs.ENOPKG }}},
'EREMOTE': {{{ cDefs.EREMOTE }}},
'ENOLINK': {{{ cDefs.ENOLINK }}},
'EADV': {{{ cDefs.EADV }}},
'ESRMNT': {{{ cDefs.ESRMNT }}},
'ECOMM': {{{ cDefs.ECOMM }}},
'EPROTO': {{{ cDefs.EPROTO }}},
'EMULTIHOP': {{{ cDefs.EMULTIHOP }}},
'EDOTDOT': {{{ cDefs.EDOTDOT }}},
'EBADMSG': {{{ cDefs.EBADMSG }}},
'ENOTUNIQ': {{{ cDefs.ENOTUNIQ }}},
'EBADFD': {{{ cDefs.EBADFD }}},
'EREMCHG': {{{ cDefs.EREMCHG }}},
'ELIBACC': {{{ cDefs.ELIBACC }}},
'ELIBBAD': {{{ cDefs.ELIBBAD }}},
'ELIBSCN': {{{ cDefs.ELIBSCN }}},
'ELIBMAX': {{{ cDefs.ELIBMAX }}},
'ELIBEXEC': {{{ cDefs.ELIBEXEC }}},
'ENOSYS': {{{ cDefs.ENOSYS }}},
'ENOTEMPTY': {{{ cDefs.ENOTEMPTY }}},
'ENAMETOOLONG': {{{ cDefs.ENAMETOOLONG }}},
'ELOOP': {{{ cDefs.ELOOP }}},
'EOPNOTSUPP': {{{ cDefs.EOPNOTSUPP }}},
'EPFNOSUPPORT': {{{ cDefs.EPFNOSUPPORT }}},
'ECONNRESET': {{{ cDefs.ECONNRESET }}},
'ENOBUFS': {{{ cDefs.ENOBUFS }}},
'EAFNOSUPPORT': {{{ cDefs.EAFNOSUPPORT }}},
'EPROTOTYPE': {{{ cDefs.EPROTOTYPE }}},
'ENOTSOCK': {{{ cDefs.ENOTSOCK }}},
'ENOPROTOOPT': {{{ cDefs.ENOPROTOOPT }}},
'ESHUTDOWN': {{{ cDefs.ESHUTDOWN }}},
'ECONNREFUSED': {{{ cDefs.ECONNREFUSED }}},
'EADDRINUSE': {{{ cDefs.EADDRINUSE }}},
'ECONNABORTED': {{{ cDefs.ECONNABORTED }}},
'ENETUNREACH': {{{ cDefs.ENETUNREACH }}},
'ENETDOWN': {{{ cDefs.ENETDOWN }}},
'ETIMEDOUT': {{{ cDefs.ETIMEDOUT }}},
'EHOSTDOWN': {{{ cDefs.EHOSTDOWN }}},
'EHOSTUNREACH': {{{ cDefs.EHOSTUNREACH }}},
'EINPROGRESS': {{{ cDefs.EINPROGRESS }}},
'EALREADY': {{{ cDefs.EALREADY }}},
'EDESTADDRREQ': {{{ cDefs.EDESTADDRREQ }}},
'EMSGSIZE': {{{ cDefs.EMSGSIZE }}},
'EPROTONOSUPPORT': {{{ cDefs.EPROTONOSUPPORT }}},
'ESOCKTNOSUPPORT': {{{ cDefs.ESOCKTNOSUPPORT }}},
'EADDRNOTAVAIL': {{{ cDefs.EADDRNOTAVAIL }}},
'ENETRESET': {{{ cDefs.ENETRESET }}},
'EISCONN': {{{ cDefs.EISCONN }}},
'ENOTCONN': {{{ cDefs.ENOTCONN }}},
'ETOOMANYREFS': {{{ cDefs.ETOOMANYREFS }}},
'EUSERS': {{{ cDefs.EUSERS }}},
'EDQUOT': {{{ cDefs.EDQUOT }}},
'ESTALE': {{{ cDefs.ESTALE }}},
'ENOTSUP': {{{ cDefs.ENOTSUP }}},
'ENOMEDIUM': {{{ cDefs.ENOMEDIUM }}},
'EILSEQ': {{{ cDefs.EILSEQ }}},
'EOVERFLOW': {{{ cDefs.EOVERFLOW }}},
'ECANCELED': {{{ cDefs.ECANCELED }}},
'ENOTRECOVERABLE': {{{ cDefs.ENOTRECOVERABLE }}},
'EOWNERDEAD': {{{ cDefs.EOWNERDEAD }}},
'ESTRPIPE': {{{ cDefs.ESTRPIPE }}},
};`,
$ERRNO_CODES: {},
$ERRNO_MESSAGES: {
0: 'Success',
{{{ cDefs.EPERM }}}: 'Not super-user',
{{{ cDefs.ENOENT }}}: 'No such file or directory',
{{{ cDefs.ESRCH }}}: 'No such process',
{{{ cDefs.EINTR }}}: 'Interrupted system call',
{{{ cDefs.EIO }}}: 'I/O error',
{{{ cDefs.ENXIO }}}: 'No such device or address',
{{{ cDefs.E2BIG }}}: 'Arg list too long',
{{{ cDefs.ENOEXEC }}}: 'Exec format error',
{{{ cDefs.EBADF }}}: 'Bad file number',
{{{ cDefs.ECHILD }}}: 'No children',
{{{ cDefs.EWOULDBLOCK }}}: 'No more processes',
{{{ cDefs.ENOMEM }}}: 'Not enough core',
{{{ cDefs.EACCES }}}: 'Permission denied',
{{{ cDefs.EFAULT }}}: 'Bad address',
{{{ cDefs.ENOTBLK }}}: 'Block device required',
{{{ cDefs.EBUSY }}}: 'Mount device busy',
{{{ cDefs.EEXIST }}}: 'File exists',
{{{ cDefs.EXDEV }}}: 'Cross-device link',
{{{ cDefs.ENODEV }}}: 'No such device',
{{{ cDefs.ENOTDIR }}}: 'Not a directory',
{{{ cDefs.EISDIR }}}: 'Is a directory',
{{{ cDefs.EINVAL }}}: 'Invalid argument',
{{{ cDefs.ENFILE }}}: 'Too many open files in system',
{{{ cDefs.EMFILE }}}: 'Too many open files',
{{{ cDefs.ENOTTY }}}: 'Not a typewriter',
{{{ cDefs.ETXTBSY }}}: 'Text file busy',
{{{ cDefs.EFBIG }}}: 'File too large',
{{{ cDefs.ENOSPC }}}: 'No space left on device',
{{{ cDefs.ESPIPE }}}: 'Illegal seek',
{{{ cDefs.EROFS }}}: 'Read only file system',
{{{ cDefs.EMLINK }}}: 'Too many links',
{{{ cDefs.EPIPE }}}: 'Broken pipe',
{{{ cDefs.EDOM }}}: 'Math arg out of domain of func',
{{{ cDefs.ERANGE }}}: 'Math result not representable',
{{{ cDefs.ENOMSG }}}: 'No message of desired type',
{{{ cDefs.EIDRM }}}: 'Identifier removed',
{{{ cDefs.ECHRNG }}}: 'Channel number out of range',
{{{ cDefs.EL2NSYNC }}}: 'Level 2 not synchronized',
{{{ cDefs.EL3HLT }}}: 'Level 3 halted',
{{{ cDefs.EL3RST }}}: 'Level 3 reset',
{{{ cDefs.ELNRNG }}}: 'Link number out of range',
{{{ cDefs.EUNATCH }}}: 'Protocol driver not attached',
{{{ cDefs.ENOCSI }}}: 'No CSI structure available',
{{{ cDefs.EL2HLT }}}: 'Level 2 halted',
{{{ cDefs.EDEADLK }}}: 'Deadlock condition',
{{{ cDefs.ENOLCK }}}: 'No record locks available',
{{{ cDefs.EBADE }}}: 'Invalid exchange',
{{{ cDefs.EBADR }}}: 'Invalid request descriptor',
{{{ cDefs.EXFULL }}}: 'Exchange full',
{{{ cDefs.ENOANO }}}: 'No anode',
{{{ cDefs.EBADRQC }}}: 'Invalid request code',
{{{ cDefs.EBADSLT }}}: 'Invalid slot',
{{{ cDefs.EDEADLOCK }}}: 'File locking deadlock error',
{{{ cDefs.EBFONT }}}: 'Bad font file fmt',
{{{ cDefs.ENOSTR }}}: 'Device not a stream',
{{{ cDefs.ENODATA }}}: 'No data (for no delay io)',
{{{ cDefs.ETIME }}}: 'Timer expired',
{{{ cDefs.ENOSR }}}: 'Out of streams resources',
{{{ cDefs.ENONET }}}: 'Machine is not on the network',
{{{ cDefs.ENOPKG }}}: 'Package not installed',
{{{ cDefs.EREMOTE }}}: 'The object is remote',
{{{ cDefs.ENOLINK }}}: 'The link has been severed',
{{{ cDefs.EADV }}}: 'Advertise error',
{{{ cDefs.ESRMNT }}}: 'Srmount error',
{{{ cDefs.ECOMM }}}: 'Communication error on send',
{{{ cDefs.EPROTO }}}: 'Protocol error',
{{{ cDefs.EMULTIHOP }}}: 'Multihop attempted',
{{{ cDefs.EDOTDOT }}}: 'Cross mount point (not really error)',
{{{ cDefs.EBADMSG }}}: 'Trying to read unreadable message',
{{{ cDefs.ENOTUNIQ }}}: 'Given log. name not unique',
{{{ cDefs.EBADFD }}}: 'f.d. invalid for this operation',
{{{ cDefs.EREMCHG }}}: 'Remote address changed',
{{{ cDefs.ELIBACC }}}: 'Can access a needed shared lib',
{{{ cDefs.ELIBBAD }}}: 'Accessing a corrupted shared lib',
{{{ cDefs.ELIBSCN }}}: '.lib section in a.out corrupted',
{{{ cDefs.ELIBMAX }}}: 'Attempting to link in too many libs',
{{{ cDefs.ELIBEXEC }}}: 'Attempting to exec a shared library',
{{{ cDefs.ENOSYS }}}: 'Function not implemented',
{{{ cDefs.ENOTEMPTY }}}: 'Directory not empty',
{{{ cDefs.ENAMETOOLONG }}}: 'File or path name too long',
{{{ cDefs.ELOOP }}}: 'Too many symbolic links',
{{{ cDefs.EOPNOTSUPP }}}: 'Operation not supported on transport endpoint',
{{{ cDefs.EPFNOSUPPORT }}}: 'Protocol family not supported',
{{{ cDefs.ECONNRESET }}}: 'Connection reset by peer',
{{{ cDefs.ENOBUFS }}}: 'No buffer space available',
{{{ cDefs.EAFNOSUPPORT }}}: 'Address family not supported by protocol family',
{{{ cDefs.EPROTOTYPE }}}: 'Protocol wrong type for socket',
{{{ cDefs.ENOTSOCK }}}: 'Socket operation on non-socket',
{{{ cDefs.ENOPROTOOPT }}}: 'Protocol not available',
{{{ cDefs.ESHUTDOWN }}}: 'Can\'t send after socket shutdown',
{{{ cDefs.ECONNREFUSED }}}: 'Connection refused',
{{{ cDefs.EADDRINUSE }}}: 'Address already in use',
{{{ cDefs.ECONNABORTED }}}: 'Connection aborted',
{{{ cDefs.ENETUNREACH }}}: 'Network is unreachable',
{{{ cDefs.ENETDOWN }}}: 'Network interface is not configured',
{{{ cDefs.ETIMEDOUT }}}: 'Connection timed out',
{{{ cDefs.EHOSTDOWN }}}: 'Host is down',
{{{ cDefs.EHOSTUNREACH }}}: 'Host is unreachable',
{{{ cDefs.EINPROGRESS }}}: 'Connection already in progress',
{{{ cDefs.EALREADY }}}: 'Socket already connected',
{{{ cDefs.EDESTADDRREQ }}}: 'Destination address required',
{{{ cDefs.EMSGSIZE }}}: 'Message too long',
{{{ cDefs.EPROTONOSUPPORT }}}: 'Unknown protocol',
{{{ cDefs.ESOCKTNOSUPPORT }}}: 'Socket type not supported',
{{{ cDefs.EADDRNOTAVAIL }}}: 'Address not available',
{{{ cDefs.ENETRESET }}}: 'Connection reset by network',
{{{ cDefs.EISCONN }}}: 'Socket is already connected',
{{{ cDefs.ENOTCONN }}}: 'Socket is not connected',
{{{ cDefs.ETOOMANYREFS }}}: 'Too many references',
{{{ cDefs.EUSERS }}}: 'Too many users',
{{{ cDefs.EDQUOT }}}: 'Quota exceeded',
{{{ cDefs.ESTALE }}}: 'Stale file handle',
{{{ cDefs.ENOTSUP }}}: 'Not supported',
{{{ cDefs.ENOMEDIUM }}}: 'No medium (in tape drive)',
{{{ cDefs.EILSEQ }}}: 'Illegal byte sequence',
{{{ cDefs.EOVERFLOW }}}: 'Value too large for defined data type',
{{{ cDefs.ECANCELED }}}: 'Operation canceled',
{{{ cDefs.ENOTRECOVERABLE }}}: 'State not recoverable',
{{{ cDefs.EOWNERDEAD }}}: 'Previous owner died',
{{{ cDefs.ESTRPIPE }}}: 'Streams pipe error',
},
#if SUPPORT_ERRNO
$setErrNo__deps: ['__errno_location'],
$setErrNo: (value) => {
{{{makeSetValue("___errno_location()", 0, 'value', 'i32') }}};
return value;
},
#else
$setErrNo: (value) => {
#if ASSERTIONS
err('failed to set errno from JS');
#endif
return 0;
},
#endif
#if PROXY_POSIX_SOCKETS == 0
// ==========================================================================
// netdb.h
// ==========================================================================
$inetPton4: (str) => {
var b = str.split('.');
for (var i = 0; i < 4; i++) {
var tmp = Number(b[i]);
if (isNaN(tmp)) return null;
b[i] = tmp;
}
return (b[0] | (b[1] << 8) | (b[2] << 16) | (b[3] << 24)) >>> 0;
},
$inetNtop4: (addr) => {
return (addr & 0xff) + '.' + ((addr >> 8) & 0xff) + '.' + ((addr >> 16) & 0xff) + '.' + ((addr >> 24) & 0xff)
},
$inetPton6__deps: ['htons', '$jstoi_q'],
$inetPton6: (str) => {
var words;
var w, offset, z, i;
/* http://home.deds.nl/~aeron/regex/ */
var valid6regx = /^((?=.*::)(?!.*::.+::)(::)?([\dA-F]{1,4}:(:|\b)|){5}|([\dA-F]{1,4}:){6})((([\dA-F]{1,4}((?!\3)::|:\b|$))|(?!\2\3)){2}|(((2[0-4]|1\d|[1-9])?\d|25[0-5])\.?\b){4})$/i
var parts = [];
if (!valid6regx.test(str)) {
return null;
}
if (str === "::") {
return [0, 0, 0, 0, 0, 0, 0, 0];
}
// Z placeholder to keep track of zeros when splitting the string on ":"
if (str.startsWith("::")) {
str = str.replace("::", "Z:"); // leading zeros case
} else {
str = str.replace("::", ":Z:");
}
if (str.indexOf(".") > 0) {
// parse IPv4 embedded stress
str = str.replace(new RegExp('[.]', 'g'), ":");
words = str.split(":");
words[words.length-4] = jstoi_q(words[words.length-4]) + jstoi_q(words[words.length-3])*256;
words[words.length-3] = jstoi_q(words[words.length-2]) + jstoi_q(words[words.length-1])*256;
words = words.slice(0, words.length-2);
} else {
words = str.split(":");
}
offset = 0; z = 0;
for (w=0; w < words.length; w++) {
if (typeof words[w] == 'string') {
if (words[w] === 'Z') {
// compressed zeros - write appropriate number of zero words
for (z = 0; z < (8 - words.length+1); z++) {
parts[w+z] = 0;
}
offset = z-1;
} else {
// parse hex to field to 16-bit value and write it in network byte-order
parts[w+offset] = _htons(parseInt(words[w],16));
}
} else {
// parsed IPv4 words
parts[w+offset] = words[w];
}
}
return [
(parts[1] << 16) | parts[0],
(parts[3] << 16) | parts[2],
(parts[5] << 16) | parts[4],
(parts[7] << 16) | parts[6]
];
},
$inetNtop6__deps: ['$inetNtop4', 'ntohs'],
$inetNtop6: (ints) => {
// ref: http://www.ietf.org/rfc/rfc2373.txt - section 2.5.4
// Format for IPv4 compatible and mapped 128-bit IPv6 Addresses
// 128-bits are split into eight 16-bit words
// stored in network byte order (big-endian)
// | 80 bits | 16 | 32 bits |
// +-----------------------------------------------------------------+
// | 10 bytes | 2 | 4 bytes |
// +--------------------------------------+--------------------------+
// + 5 words | 1 | 2 words |
// +--------------------------------------+--------------------------+
// |0000..............................0000|0000| IPv4 ADDRESS | (compatible)
// +--------------------------------------+----+---------------------+
// |0000..............................0000|FFFF| IPv4 ADDRESS | (mapped)
// +--------------------------------------+----+---------------------+
var str = "";
var word = 0;
var longest = 0;
var lastzero = 0;
var zstart = 0;
var len = 0;
var i = 0;
var parts = [
ints[0] & 0xffff,
(ints[0] >> 16),
ints[1] & 0xffff,
(ints[1] >> 16),
ints[2] & 0xffff,
(ints[2] >> 16),
ints[3] & 0xffff,
(ints[3] >> 16)
];
// Handle IPv4-compatible, IPv4-mapped, loopback and any/unspecified addresses
var hasipv4 = true;
var v4part = "";
// check if the 10 high-order bytes are all zeros (first 5 words)
for (i = 0; i < 5; i++) {
if (parts[i] !== 0) { hasipv4 = false; break; }
}
if (hasipv4) {
// low-order 32-bits store an IPv4 address (bytes 13 to 16) (last 2 words)
v4part = inetNtop4(parts[6] | (parts[7] << 16));
// IPv4-mapped IPv6 address if 16-bit value (bytes 11 and 12) == 0xFFFF (6th word)
if (parts[5] === -1) {
str = "::ffff:";
str += v4part;
return str;
}
// IPv4-compatible IPv6 address if 16-bit value (bytes 11 and 12) == 0x0000 (6th word)
if (parts[5] === 0) {
str = "::";
//special case IPv6 addresses
if (v4part === "0.0.0.0") v4part = ""; // any/unspecified address
if (v4part === "0.0.0.1") v4part = "1";// loopback address
str += v4part;
return str;
}
}
// Handle all other IPv6 addresses
// first run to find the longest contiguous zero words
for (word = 0; word < 8; word++) {
if (parts[word] === 0) {
if (word - lastzero > 1) {
len = 0;
}
lastzero = word;
len++;
}
if (len > longest) {
longest = len;
zstart = word - longest + 1;
}
}
for (word = 0; word < 8; word++) {
if (longest > 1) {
// compress contiguous zeros - to produce "::"
if (parts[word] === 0 && word >= zstart && word < (zstart + longest) ) {
if (word === zstart) {
str += ":";
if (zstart === 0) str += ":"; //leading zeros case
}
continue;
}
}
// converts 16-bit words from big-endian to little-endian before converting to hex string
str += Number(_ntohs(parts[word] & 0xffff)).toString(16);
str += word < 7 ? ":" : "";
}
return str;
},
$readSockaddr__deps: ['$Sockets', '$inetNtop4', '$inetNtop6', 'ntohs'],
$readSockaddr: (sa, salen) => {
// family / port offsets are common to both sockaddr_in and sockaddr_in6
var family = {{{ makeGetValue('sa', C_STRUCTS.sockaddr_in.sin_family, 'i16') }}};
var port = _ntohs({{{ makeGetValue('sa', C_STRUCTS.sockaddr_in.sin_port, 'u16') }}});
var addr;
switch (family) {
case {{{ cDefs.AF_INET }}}:
if (salen !== {{{ C_STRUCTS.sockaddr_in.__size__ }}}) {
return { errno: {{{ cDefs.EINVAL }}} };
}
addr = {{{ makeGetValue('sa', C_STRUCTS.sockaddr_in.sin_addr.s_addr, 'i32') }}};
addr = inetNtop4(addr);
break;
case {{{ cDefs.AF_INET6 }}}:
if (salen !== {{{ C_STRUCTS.sockaddr_in6.__size__ }}}) {
return { errno: {{{ cDefs.EINVAL }}} };
}
addr = [
{{{ makeGetValue('sa', C_STRUCTS.sockaddr_in6.sin6_addr.__in6_union.__s6_addr+0, 'i32') }}},
{{{ makeGetValue('sa', C_STRUCTS.sockaddr_in6.sin6_addr.__in6_union.__s6_addr+4, 'i32') }}},
{{{ makeGetValue('sa', C_STRUCTS.sockaddr_in6.sin6_addr.__in6_union.__s6_addr+8, 'i32') }}},
{{{ makeGetValue('sa', C_STRUCTS.sockaddr_in6.sin6_addr.__in6_union.__s6_addr+12, 'i32') }}}
];
addr = inetNtop6(addr);
break;
default:
return { errno: {{{ cDefs.EAFNOSUPPORT }}} };
}
return { family: family, addr: addr, port: port };
},
$writeSockaddr__docs: '/** @param {number=} addrlen */',
$writeSockaddr__deps: ['$Sockets', '$inetPton4', '$inetPton6', '$zeroMemory', 'htons'],
$writeSockaddr: (sa, family, addr, port, addrlen) => {
switch (family) {
case {{{ cDefs.AF_INET }}}:
addr = inetPton4(addr);
zeroMemory(sa, {{{ C_STRUCTS.sockaddr_in.__size__ }}});
if (addrlen) {
{{{ makeSetValue('addrlen', 0, C_STRUCTS.sockaddr_in.__size__, 'i32') }}};
}
{{{ makeSetValue('sa', C_STRUCTS.sockaddr_in.sin_family, 'family', 'i16') }}};
{{{ makeSetValue('sa', C_STRUCTS.sockaddr_in.sin_addr.s_addr, 'addr', 'i32') }}};
{{{ makeSetValue('sa', C_STRUCTS.sockaddr_in.sin_port, '_htons(port)', 'i16') }}};
break;
case {{{ cDefs.AF_INET6 }}}:
addr = inetPton6(addr);
zeroMemory(sa, {{{ C_STRUCTS.sockaddr_in6.__size__ }}});
if (addrlen) {
{{{ makeSetValue('addrlen', 0, C_STRUCTS.sockaddr_in6.__size__, 'i32') }}};
}
{{{ makeSetValue('sa', C_STRUCTS.sockaddr_in6.sin6_family, 'family', 'i32') }}};
{{{ makeSetValue('sa', C_STRUCTS.sockaddr_in6.sin6_addr.__in6_union.__s6_addr+0, 'addr[0]', 'i32') }}};
{{{ makeSetValue('sa', C_STRUCTS.sockaddr_in6.sin6_addr.__in6_union.__s6_addr+4, 'addr[1]', 'i32') }}};
{{{ makeSetValue('sa', C_STRUCTS.sockaddr_in6.sin6_addr.__in6_union.__s6_addr+8, 'addr[2]', 'i32') }}};
{{{ makeSetValue('sa', C_STRUCTS.sockaddr_in6.sin6_addr.__in6_union.__s6_addr+12, 'addr[3]', 'i32') }}};
{{{ makeSetValue('sa', C_STRUCTS.sockaddr_in6.sin6_port, '_htons(port)', 'i16') }}};
break;
default:
return {{{ cDefs.EAFNOSUPPORT }}};
}
return 0;
},
// We can't actually resolve hostnames in the browser, so instead
// we're generating fake IP addresses with lookup_name that we can
// resolve later on with lookup_addr.
// We do the aliasing in 172.29.*.*, giving us 65536 possibilities.
$DNS__deps: ['$inetPton4', '$inetPton6'],
$DNS: {
address_map: {
id: 1,
addrs: {},
names: {}
},
lookup_name(name) {
// If the name is already a valid ipv4 / ipv6 address, don't generate a fake one.
var res = inetPton4(name);
if (res !== null) {
return name;
}
res = inetPton6(name);
if (res !== null) {
return name;
}
// See if this name is already mapped.
var addr;
if (DNS.address_map.addrs[name]) {
addr = DNS.address_map.addrs[name];
} else {
var id = DNS.address_map.id++;
assert(id < 65535, 'exceeded max address mappings of 65535');
addr = '172.29.' + (id & 0xff) + '.' + (id & 0xff00);
DNS.address_map.names[addr] = name;
DNS.address_map.addrs[name] = addr;
}
return addr;
},
lookup_addr(addr) {
if (DNS.address_map.names[addr]) {
return DNS.address_map.names[addr];
}
return null;
}
},
// note: lots of leaking here!
gethostbyaddr__deps: ['$DNS', '$getHostByName', '$inetNtop4', '$setErrNo'],
gethostbyaddr__proxy: 'sync',
gethostbyaddr: (addr, addrlen, type) => {
if (type !== {{{ cDefs.AF_INET }}}) {
setErrNo({{{ cDefs.EAFNOSUPPORT }}});
// TODO: set h_errno
return null;
}
addr = {{{ makeGetValue('addr', '0', 'i32') }}}; // addr is in_addr
var host = inetNtop4(addr);
var lookup = DNS.lookup_addr(host);
if (lookup) {
host = lookup;
}
return getHostByName(host);
},
gethostbyname__deps: ['$getHostByName'],
gethostbyname__proxy: 'sync',
gethostbyname: (name) => {
return getHostByName(UTF8ToString(name));
},
$getHostByName__deps: ['malloc', '$stringToNewUTF8', '$DNS', '$inetPton4'],
$getHostByName: (name) => {
// generate hostent
var ret = _malloc({{{ C_STRUCTS.hostent.__size__ }}}); // XXX possibly leaked, as are others here
var nameBuf = stringToNewUTF8(name);
{{{ makeSetValue('ret', C_STRUCTS.hostent.h_name, 'nameBuf', POINTER_TYPE) }}};
var aliasesBuf = _malloc(4);
{{{ makeSetValue('aliasesBuf', '0', '0', POINTER_TYPE) }}};
{{{ makeSetValue('ret', C_STRUCTS.hostent.h_aliases, 'aliasesBuf', 'i8**') }}};
var afinet = {{{ cDefs.AF_INET }}};
{{{ makeSetValue('ret', C_STRUCTS.hostent.h_addrtype, 'afinet', 'i32') }}};
{{{ makeSetValue('ret', C_STRUCTS.hostent.h_length, '4', 'i32') }}};
var addrListBuf = _malloc(12);
{{{ makeSetValue('addrListBuf', '0', 'addrListBuf+8', POINTER_TYPE) }}};
{{{ makeSetValue('addrListBuf', '4', '0', POINTER_TYPE) }}};
{{{ makeSetValue('addrListBuf', '8', 'inetPton4(DNS.lookup_name(name))', 'i32') }}};
{{{ makeSetValue('ret', C_STRUCTS.hostent.h_addr_list, 'addrListBuf', 'i8**') }}};
return ret;
},
gethostbyname_r__deps: ['gethostbyname', 'memcpy', 'free'],
gethostbyname_r__proxy: 'sync',
gethostbyname_r: (name, ret, buf, buflen, out, err) => {
var data = _gethostbyname(name);
_memcpy(ret, data, {{{ C_STRUCTS.hostent.__size__ }}});
_free(data);
{{{ makeSetValue('err', '0', '0', 'i32') }}};
{{{ makeSetValue('out', '0', 'ret', '*') }}};
return 0;
},
getaddrinfo__deps: ['$Sockets', '$DNS', '$inetPton4', '$inetNtop4', '$inetPton6', '$inetNtop6', '$writeSockaddr', 'malloc', 'htonl'],
getaddrinfo__proxy: 'sync',
getaddrinfo: (node, service, hint, out) => {
// Note getaddrinfo currently only returns a single addrinfo with ai_next defaulting to NULL. When NULL
// hints are specified or ai_family set to AF_UNSPEC or ai_socktype or ai_protocol set to 0 then we
// really should provide a linked list of suitable addrinfo values.
var addrs = [];
var canon = null;
var addr = 0;
var port = 0;
var flags = 0;
var family = {{{ cDefs.AF_UNSPEC }}};
var type = 0;
var proto = 0;
var ai, last;
function allocaddrinfo(family, type, proto, canon, addr, port) {
var sa, salen, ai;
var errno;
salen = family === {{{ cDefs.AF_INET6 }}} ?
{{{ C_STRUCTS.sockaddr_in6.__size__ }}} :
{{{ C_STRUCTS.sockaddr_in.__size__ }}};
addr = family === {{{ cDefs.AF_INET6 }}} ?
inetNtop6(addr) :
inetNtop4(addr);
sa = _malloc(salen);
errno = writeSockaddr(sa, family, addr, port);
assert(!errno);
ai = _malloc({{{ C_STRUCTS.addrinfo.__size__ }}});
{{{ makeSetValue('ai', C_STRUCTS.addrinfo.ai_family, 'family', 'i32') }}};
{{{ makeSetValue('ai', C_STRUCTS.addrinfo.ai_socktype, 'type', 'i32') }}};
{{{ makeSetValue('ai', C_STRUCTS.addrinfo.ai_protocol, 'proto', 'i32') }}};
{{{ makeSetValue('ai', C_STRUCTS.addrinfo.ai_canonname, 'canon', '*') }}};
{{{ makeSetValue('ai', C_STRUCTS.addrinfo.ai_addr, 'sa', '*') }}};
if (family === {{{ cDefs.AF_INET6 }}}) {
{{{ makeSetValue('ai', C_STRUCTS.addrinfo.ai_addrlen, C_STRUCTS.sockaddr_in6.__size__, 'i32') }}};
} else {
{{{ makeSetValue('ai', C_STRUCTS.addrinfo.ai_addrlen, C_STRUCTS.sockaddr_in.__size__, 'i32') }}};
}
{{{ makeSetValue('ai', C_STRUCTS.addrinfo.ai_next, '0', 'i32') }}};
return ai;
}
if (hint) {
flags = {{{ makeGetValue('hint', C_STRUCTS.addrinfo.ai_flags, 'i32') }}};
family = {{{ makeGetValue('hint', C_STRUCTS.addrinfo.ai_family, 'i32') }}};
type = {{{ makeGetValue('hint', C_STRUCTS.addrinfo.ai_socktype, 'i32') }}};
proto = {{{ makeGetValue('hint', C_STRUCTS.addrinfo.ai_protocol, 'i32') }}};
}
if (type && !proto) {
proto = type === {{{ cDefs.SOCK_DGRAM }}} ? {{{ cDefs.IPPROTO_UDP }}} : {{{ cDefs.IPPROTO_TCP }}};
}
if (!type && proto) {
type = proto === {{{ cDefs.IPPROTO_UDP }}} ? {{{ cDefs.SOCK_DGRAM }}} : {{{ cDefs.SOCK_STREAM }}};
}
// If type or proto are set to zero in hints we should really be returning multiple addrinfo values, but for
// now default to a TCP STREAM socket so we can at least return a sensible addrinfo given NULL hints.
if (proto === 0) {
proto = {{{ cDefs.IPPROTO_TCP }}};
}
if (type === 0) {
type = {{{ cDefs.SOCK_STREAM }}};
}
if (!node && !service) {
return {{{ cDefs.EAI_NONAME }}};
}
if (flags & ~({{{ cDefs.AI_PASSIVE }}}|{{{ cDefs.AI_CANONNAME }}}|{{{ cDefs.AI_NUMERICHOST }}}|
{{{ cDefs.AI_NUMERICSERV }}}|{{{ cDefs.AI_V4MAPPED }}}|{{{ cDefs.AI_ALL }}}|{{{ cDefs.AI_ADDRCONFIG }}})) {
return {{{ cDefs.EAI_BADFLAGS }}};
}
if (hint !== 0 && ({{{ makeGetValue('hint', C_STRUCTS.addrinfo.ai_flags, 'i32') }}} & {{{ cDefs.AI_CANONNAME }}}) && !node) {
return {{{ cDefs.EAI_BADFLAGS }}};
}
if (flags & {{{ cDefs.AI_ADDRCONFIG }}}) {
// TODO
return {{{ cDefs.EAI_NONAME }}};
}
if (type !== 0 && type !== {{{ cDefs.SOCK_STREAM }}} && type !== {{{ cDefs.SOCK_DGRAM }}}) {
return {{{ cDefs.EAI_SOCKTYPE }}};
}
if (family !== {{{ cDefs.AF_UNSPEC }}} && family !== {{{ cDefs.AF_INET }}} && family !== {{{ cDefs.AF_INET6 }}}) {
return {{{ cDefs.EAI_FAMILY }}};
}
if (service) {
service = UTF8ToString(service);
port = parseInt(service, 10);
if (isNaN(port)) {
if (flags & {{{ cDefs.AI_NUMERICSERV }}}) {
return {{{ cDefs.EAI_NONAME }}};
}
// TODO support resolving well-known service names from:
// http://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.txt
return {{{ cDefs.EAI_SERVICE }}};
}
}
if (!node) {
if (family === {{{ cDefs.AF_UNSPEC }}}) {
family = {{{ cDefs.AF_INET }}};
}
if ((flags & {{{ cDefs.AI_PASSIVE }}}) === 0) {
if (family === {{{ cDefs.AF_INET }}}) {
addr = _htonl({{{ cDefs.INADDR_LOOPBACK }}});
} else {
addr = [0, 0, 0, 1];
}
}
ai = allocaddrinfo(family, type, proto, null, addr, port);
{{{ makeSetValue('out', '0', 'ai', '*') }}};
return 0;
}
//
// try as a numeric address
//
node = UTF8ToString(node);
addr = inetPton4(node);
if (addr !== null) {
// incoming node is a valid ipv4 address
if (family === {{{ cDefs.AF_UNSPEC }}} || family === {{{ cDefs.AF_INET }}}) {
family = {{{ cDefs.AF_INET }}};
}
else if (family === {{{ cDefs.AF_INET6 }}} && (flags & {{{ cDefs.AI_V4MAPPED }}})) {
addr = [0, 0, _htonl(0xffff), addr];
family = {{{ cDefs.AF_INET6 }}};
} else {
return {{{ cDefs.EAI_NONAME }}};
}
} else {
addr = inetPton6(node);
if (addr !== null) {
// incoming node is a valid ipv6 address
if (family === {{{ cDefs.AF_UNSPEC }}} || family === {{{ cDefs.AF_INET6 }}}) {
family = {{{ cDefs.AF_INET6 }}};
} else {
return {{{ cDefs.EAI_NONAME }}};
}
}
}
if (addr != null) {
ai = allocaddrinfo(family, type, proto, node, addr, port);
{{{ makeSetValue('out', '0', 'ai', '*') }}};
return 0;
}
if (flags & {{{ cDefs.AI_NUMERICHOST }}}) {
return {{{ cDefs.EAI_NONAME }}};
}
//
// try as a hostname
//
// resolve the hostname to a temporary fake address
node = DNS.lookup_name(node);
addr = inetPton4(node);
if (family === {{{ cDefs.AF_UNSPEC }}}) {
family = {{{ cDefs.AF_INET }}};
} else if (family === {{{ cDefs.AF_INET6 }}}) {
addr = [0, 0, _htonl(0xffff), addr];
}
ai = allocaddrinfo(family, type, proto, null, addr, port);
{{{ makeSetValue('out', '0', 'ai', '*') }}};
return 0;
},
getnameinfo__deps: ['$Sockets', '$DNS', '$readSockaddr', '$stringToUTF8'],
getnameinfo: (sa, salen, node, nodelen, serv, servlen, flags) => {
var info = readSockaddr(sa, salen);
if (info.errno) {
return {{{ cDefs.EAI_FAMILY }}};
}
var port = info.port;
var addr = info.addr;
var overflowed = false;
if (node && nodelen) {
var lookup;
if ((flags & {{{ cDefs.NI_NUMERICHOST }}}) || !(lookup = DNS.lookup_addr(addr))) {
if (flags & {{{ cDefs.NI_NAMEREQD }}}) {
return {{{ cDefs.EAI_NONAME }}};
}
} else {
addr = lookup;
}
var numBytesWrittenExclNull = stringToUTF8(addr, node, nodelen);
if (numBytesWrittenExclNull+1 >= nodelen) {
overflowed = true;
}
}
if (serv && servlen) {
port = '' + port;
var numBytesWrittenExclNull = stringToUTF8(port, serv, servlen);
if (numBytesWrittenExclNull+1 >= servlen) {
overflowed = true;
}
}
if (overflowed) {
// Note: even when we overflow, getnameinfo() is specced to write out the truncated results.
return {{{ cDefs.EAI_OVERFLOW }}};
}
return 0;
},
// Implement netdb.h protocol entry (getprotoent, getprotobyname, getprotobynumber, setprotoent, endprotoent)
// http://pubs.opengroup.org/onlinepubs/9699919799/functions/getprotobyname.html
// The Protocols object holds our 'fake' protocols 'database'.
$Protocols: {
list: [],
map: {}
},
setprotoent__deps: ['$Protocols', '$stringToAscii', 'malloc'],
setprotoent: (stayopen) => {
// void setprotoent(int stayopen);
// Allocate and populate a protoent structure given a name, protocol number and array of aliases
function allocprotoent(name, proto, aliases) {
// write name into buffer
var nameBuf = _malloc(name.length + 1);
stringToAscii(name, nameBuf);
// write aliases into buffer
var j = 0;
var length = aliases.length;
var aliasListBuf = _malloc((length + 1) * 4); // Use length + 1 so we have space for the terminating NULL ptr.
for (var i = 0; i < length; i++, j += 4) {
var alias = aliases[i];
var aliasBuf = _malloc(alias.length + 1);
stringToAscii(alias, aliasBuf);
{{{ makeSetValue('aliasListBuf', 'j', 'aliasBuf', POINTER_TYPE) }}};
}
{{{ makeSetValue('aliasListBuf', 'j', '0', POINTER_TYPE) }}}; // Terminating NULL pointer.
// generate protoent
var pe = _malloc({{{ C_STRUCTS.protoent.__size__ }}});
{{{ makeSetValue('pe', C_STRUCTS.protoent.p_name, 'nameBuf', POINTER_TYPE) }}};
{{{ makeSetValue('pe', C_STRUCTS.protoent.p_aliases, 'aliasListBuf', POINTER_TYPE) }}};
{{{ makeSetValue('pe', C_STRUCTS.protoent.p_proto, 'proto', 'i32') }}};
return pe;
};
// Populate the protocol 'database'. The entries are limited to tcp and udp, though it is fairly trivial
// to add extra entries from /etc/protocols if desired - though not sure if that'd actually be useful.
var list = Protocols.list;
var map = Protocols.map;
if (list.length === 0) {
var entry = allocprotoent('tcp', 6, ['TCP']);
list.push(entry);
map['tcp'] = map['6'] = entry;
entry = allocprotoent('udp', 17, ['UDP']);
list.push(entry);
map['udp'] = map['17'] = entry;
}
_setprotoent.index = 0;
},
endprotoent: () => {
// void endprotoent(void);
// We're not using a real protocol database so we don't do a real close.
},
getprotoent__deps: ['setprotoent', '$Protocols'],
getprotoent: (number) => {
// struct protoent *getprotoent(void);
// reads the next entry from the protocols 'database' or return NULL if 'eof'
if (_setprotoent.index === Protocols.list.length) {
return 0;
}
var result = Protocols.list[_setprotoent.index++];
return result;
},
getprotobyname__deps: ['setprotoent', '$Protocols'],
getprotobyname: (name) => {
// struct protoent *getprotobyname(const char *);
name = UTF8ToString(name);
_setprotoent(true);
var result = Protocols.map[name];
return result;
},
getprotobynumber__deps: ['setprotoent', '$Protocols'],
getprotobynumber: (number) => {
// struct protoent *getprotobynumber(int proto);
_setprotoent(true);
var result = Protocols.map[number];
return result;
},
// ==========================================================================
// sockets. Note that the implementation assumes all sockets are always
// nonblocking
// ==========================================================================
#if SOCKET_WEBRTC
$Sockets__deps: ['$setErrNo',
() => 'var SocketIO = ' + read('../third_party/socket.io.js') + ';\n',
() => 'var Peer = ' + read('../third_party/wrtcp.js') + ';\n'],
#else
$Sockets__deps: ['$setErrNo'],
#endif
$Sockets: {
BUFFER_SIZE: 10*1024, // initial size
MAX_BUFFER_SIZE: 10*1024*1024, // maximum size we will grow the buffer
nextFd: 1,
fds: {},
nextport: 1,
maxport: 65535,
peer: null,
connections: {},
portmap: {},
localAddr: 0xfe00000a, // Local address is always 10.0.0.254
addrPool: [ 0x0200000a, 0x0300000a, 0x0400000a, 0x0500000a,
0x0600000a, 0x0700000a, 0x0800000a, 0x0900000a, 0x0a00000a,
0x0b00000a, 0x0c00000a, 0x0d00000a, 0x0e00000a] /* 0x0100000a is reserved */
},
#endif // PROXY_POSIX_SOCKETS == 0
// random.h
$initRandomFill: () => {
if (typeof crypto == 'object' && typeof crypto['getRandomValues'] == 'function') {
// for modern web browsers
#if SHARED_MEMORY
// like with most Web APIs, we can't use Web Crypto API directly on shared memory,
// so we need to create an intermediate buffer and copy it to the destination
return (view) => (
view.set(crypto.getRandomValues(new Uint8Array(view.byteLength))),
// Return the original view to match modern native implementations.
view
);
#else
return (view) => crypto.getRandomValues(view);
#endif
} else
#if ENVIRONMENT_MAY_BE_NODE
if (ENVIRONMENT_IS_NODE) {
// for nodejs with or without crypto support included
try {
var crypto_module = require('crypto');
var randomFillSync = crypto_module['randomFillSync'];
if (randomFillSync) {
// nodejs with LTS crypto support
return (view) => crypto_module['randomFillSync'](view);
}
// very old nodejs with the original crypto API
var randomBytes = crypto_module['randomBytes'];
return (view) => (
view.set(randomBytes(view.byteLength)),
// Return the original view to match modern native implementations.
view
);
} catch (e) {
// nodejs doesn't have crypto support
}
}
#endif // ENVIRONMENT_MAY_BE_NODE
// we couldn't find a proper implementation, as Math.random() is not suitable for /dev/random, see emscripten-core/emscripten/pull/7096
#if ASSERTIONS
abort("no cryptographic support found for randomDevice. consider polyfilling it if you want to use something insecure like Math.random(), e.g. put this in a --pre-js: var crypto = { getRandomValues: (array) => { for (var i = 0; i < array.length; i++) array[i] = (Math.random()*256)|0 } };");
#else
abort("initRandomDevice");
#endif
},
$randomFill__deps: ['$initRandomFill'],
$randomFill: (view) => {
// Lazily init on the first invocation.
return (randomFill = initRandomFill())(view);
},
getentropy__deps: ['$randomFill'],
getentropy: (buffer, size) => {
randomFill(HEAPU8.subarray(buffer, buffer + size));
return 0;
},
$timers: {},
// Helper function for setitimer that registers timers with the eventloop.
// Timers always fire on the main thread, either directly from JS (here) or
// or when the main thread is busy waiting calling _emscripten_yield.
_setitimer_js__proxy: 'sync',
_setitimer_js__deps: ['$timers', '$callUserCallback',
'_emscripten_timeout', 'emscripten_get_now'],
_setitimer_js: (which, timeout_ms) => {
#if RUNTIME_DEBUG
dbg(`setitimer_js ${which} timeout=${timeout_ms}`);
#endif
// First, clear any existing timer.
if (timers[which]) {
clearTimeout(timers[which].id);
delete timers[which];
}
// A timeout of zero simply cancels the current timeout so we have nothing
// more to do.
if (!timeout_ms) return 0;
var id = setTimeout(() => {
#if ASSERTIONS
assert(which in timers);
#endif
delete timers[which];
#if RUNTIME_DEBUG
dbg(`itimer fired: ${which}`);
#endif
callUserCallback(() => __emscripten_timeout(which, _emscripten_get_now()));
}, timeout_ms);
timers[which] = { id, timeout_ms };
return 0;
},
// Helper for raise() to avoid signature mismatch failures:
// https://github.com/emscripten-core/posixtestsuite/issues/6
__call_sighandler: (fp, sig) => {{{ makeDynCall('vi', 'fp') }}}(sig),
// ==========================================================================
// emscripten.h
// ==========================================================================
emscripten_run_script: (ptr) => {
{{{ makeEval('eval(UTF8ToString(ptr));') }}}
},
emscripten_run_script_int__docs: '/** @suppress{checkTypes} */',
emscripten_run_script_int: (ptr) => {
{{{ makeEval('return eval(UTF8ToString(ptr))|0;') }}}
},
// Mark as `noleakcheck` otherwise lsan will report the last returned string
// as a leak.
emscripten_run_script_string__noleakcheck: true,
emscripten_run_script_string__deps: ['$lengthBytesUTF8', '$stringToUTF8', 'malloc'],
emscripten_run_script_string: (ptr) => {
{{{ makeEval("var s = eval(UTF8ToString(ptr));") }}}
if (s == null) {
return 0;
}
s += '';
var me = _emscripten_run_script_string;
var len = lengthBytesUTF8(s);
if (!me.bufferSize || me.bufferSize < len+1) {
if (me.bufferSize) _free(me.buffer);
me.bufferSize = len+1;
me.buffer = _malloc(me.bufferSize);
}
stringToUTF8(s, me.buffer, me.bufferSize);
return me.buffer;
},
emscripten_random: () => Math.random(),
emscripten_get_now: `;
#if ENVIRONMENT_MAY_BE_NODE && MIN_NODE_VERSION < 160000
// The performance global was added to node in v16.0.0:
// https://nodejs.org/api/globals.html#performance
if (ENVIRONMENT_IS_NODE) {
global.performance = require('perf_hooks').performance;
}
#endif
#if PTHREADS && !AUDIO_WORKLET
// Pthreads need their clocks synchronized to the execution of the main
// thread, so, when using them, make sure to adjust all timings to the
// respective time origins.
_emscripten_get_now = () => performance.timeOrigin + {{{ getPerformanceNow() }}}();
#else
#if MIN_IE_VERSION <= 9 || MIN_FIREFOX_VERSION <= 14 || MIN_CHROME_VERSION <= 23 || MIN_SAFARI_VERSION <= 80400 || AUDIO_WORKLET // https://caniuse.com/#feat=high-resolution-time
// AudioWorkletGlobalScope does not have performance.now()
// (https://github.com/WebAudio/web-audio-api/issues/2527), so if building
// with
// Audio Worklets enabled, do a dynamic check for its presence.
if (typeof performance != 'undefined' && {{{ getPerformanceNow() }}}) {
#if PTHREADS
_emscripten_get_now = () => performance.timeOrigin + {{{ getPerformanceNow() }}}();
#else
_emscripten_get_now = () => {{{ getPerformanceNow() }}}();
#endif
} else {
_emscripten_get_now = Date.now;
}
#else
// Modern environment where performance.now() is supported:
// N.B. a shorter form "_emscripten_get_now = performance.now;" is
// unfortunately not allowed even in current browsers (e.g. FF Nightly 75).
_emscripten_get_now = () => {{{ getPerformanceNow() }}}();
#endif
#endif
`,
emscripten_get_now_res: () => { // return resolution of get_now, in nanoseconds
#if ENVIRONMENT_MAY_BE_NODE
if (ENVIRONMENT_IS_NODE) {
return 1; // nanoseconds
}
#endif
#if MIN_IE_VERSION <= 9 || MIN_FIREFOX_VERSION <= 14 || MIN_CHROME_VERSION <= 23 || MIN_SAFARI_VERSION <= 80400 // https://caniuse.com/#feat=high-resolution-time
if (typeof performance == 'object' && performance && typeof performance['now'] == 'function') {
return 1000; // microseconds (1/1000 of a millisecond)
}
return 1000*1000; // milliseconds
#else
// Modern environment where performance.now() is supported:
return 1000; // microseconds (1/1000 of a millisecond)
#endif
},
// Represents whether emscripten_get_now is guaranteed monotonic; the Date.now
// implementation is not :(
$nowIsMonotonic__internal: true,
#if MIN_IE_VERSION <= 9 || MIN_FIREFOX_VERSION <= 14 || MIN_CHROME_VERSION <= 23 || MIN_SAFARI_VERSION <= 80400 // https://caniuse.com/#feat=high-resolution-time
$nowIsMonotonic: `
((typeof performance == 'object' && performance && typeof performance['now'] == 'function')
#if ENVIRONMENT_MAY_BE_NODE
|| ENVIRONMENT_IS_NODE
#endif
);`,
#else
// Modern environment where performance.now() is supported: (rely on minifier to return true unconditionally from this function)
$nowIsMonotonic: 'true;',
#endif
_emscripten_get_now_is_monotonic__internal: true,
_emscripten_get_now_is_monotonic__deps: ['$nowIsMonotonic'],
_emscripten_get_now_is_monotonic: () => nowIsMonotonic,
$warnOnce: (text) => {
if (!warnOnce.shown) warnOnce.shown = {};
if (!warnOnce.shown[text]) {
warnOnce.shown[text] = 1;
#if ENVIRONMENT_MAY_BE_NODE
if (ENVIRONMENT_IS_NODE) text = 'warning: ' + text;
#endif
err(text);
}
},
$getCallstack__deps: ['$jsStackTrace', '$warnOnce'],
$getCallstack__docs: '/** @param {number=} flags */',
$getCallstack: function(flags) {
var callstack = jsStackTrace();
// Find the symbols in the callstack that corresponds to the functions that
// report callstack information, and remove everything up to these from the
// output.
var iThisFunc = callstack.lastIndexOf('_emscripten_log');
var iThisFunc2 = callstack.lastIndexOf('_emscripten_get_callstack');
var iNextLine = callstack.indexOf('\n', Math.max(iThisFunc, iThisFunc2))+1;
callstack = callstack.slice(iNextLine);
// If user requested to see the original source stack, but no source map
// information is available, just fall back to showing the JS stack.
if (flags & {{{ cDefs.EM_LOG_C_STACK }}} && typeof emscripten_source_map == 'undefined') {
warnOnce('Source map information is not available, emscripten_log with EM_LOG_C_STACK will be ignored. Build with "--pre-js $EMSCRIPTEN/src/emscripten-source-map.min.js" linker flag to add source map loading to code.');
flags ^= {{{ cDefs.EM_LOG_C_STACK }}};
flags |= {{{ cDefs.EM_LOG_JS_STACK }}};
}
// Process all lines:
var lines = callstack.split('\n');
callstack = '';
// New FF30 with column info: extract components of form:
// ' Object._main@http://server.com:4324:12'
var newFirefoxRe = new RegExp('\\s*(.*?)@(.*?):([0-9]+):([0-9]+)');
// Old FF without column info: extract components of form:
// ' Object._main@http://server.com:4324'
var firefoxRe = new RegExp('\\s*(.*?)@(.*):(.*)(:(.*))?');
// Extract components of form:
// ' at Object._main (http://server.com/file.html:4324:12)'
var chromeRe = new RegExp('\\s*at (.*?) \\\((.*):(.*):(.*)\\\)');
for (var l in lines) {
var line = lines[l];
var symbolName = '';
var file = '';
var lineno = 0;
var column = 0;
var parts = chromeRe.exec(line);
if (parts && parts.length == 5) {
symbolName = parts[1];
file = parts[2];
lineno = parts[3];
column = parts[4];
} else {
parts = newFirefoxRe.exec(line);
if (!parts) parts = firefoxRe.exec(line);
if (parts && parts.length >= 4) {
symbolName = parts[1];
file = parts[2];
lineno = parts[3];
// Old Firefox doesn't carry column information, but in new FF30, it
// is present. See https://bugzilla.mozilla.org/show_bug.cgi?id=762556
column = parts[4]|0;
} else {
// Was not able to extract this line for demangling/sourcemapping
// purposes. Output it as-is.
callstack += line + '\n';
continue;
}
}
var haveSourceMap = false;
if (flags & {{{ cDefs.EM_LOG_C_STACK }}}) {
var orig = emscripten_source_map.originalPositionFor({line: lineno, column: column});
haveSourceMap = (orig && orig.source);
if (haveSourceMap) {
if (flags & {{{ cDefs.EM_LOG_NO_PATHS }}}) {
orig.source = orig.source.substring(orig.source.replace(/\\/g, "/").lastIndexOf('/')+1);
}
callstack += ` at ${symbolName} (${orig.source}:${orig.line}:${orig.column})\n`;
}
}
if ((flags & {{{ cDefs.EM_LOG_JS_STACK }}}) || !haveSourceMap) {
if (flags & {{{ cDefs.EM_LOG_NO_PATHS }}}) {
file = file.substring(file.replace(/\\/g, "/").lastIndexOf('/')+1);
}
callstack += (haveSourceMap ? (` = ${symbolName}`) : (` at ${symbolName}`)) + ` (${file}:${lineno}:${column})\n`;
}
}
// Trim extra whitespace at the end of the output.
callstack = callstack.replace(/\s+$/, '');
return callstack;
},
emscripten_get_callstack__deps: ['$getCallstack', '$lengthBytesUTF8', '$stringToUTF8'],
emscripten_get_callstack: function(flags, str, maxbytes) {
var callstack = getCallstack(flags);
// User can query the required amount of bytes to hold the callstack.
if (!str || maxbytes <= 0) {
return lengthBytesUTF8(callstack)+1;
}
// Output callstack string as C string to HEAP.
var bytesWrittenExcludingNull = stringToUTF8(callstack, str, maxbytes);
// Return number of bytes written, including null.
return bytesWrittenExcludingNull+1;
},
$emscriptenLog__deps: ['$getCallstack'],
$emscriptenLog: (flags, str) => {
if (flags & {{{ cDefs.EM_LOG_C_STACK | cDefs.EM_LOG_JS_STACK }}}) {
str = str.replace(/\s+$/, ''); // Ensure the message and the callstack are joined cleanly with exactly one newline.
str += (str.length > 0 ? '\n' : '') + getCallstack(flags);
}
if (flags & {{{ cDefs.EM_LOG_CONSOLE }}}) {
if (flags & {{{ cDefs.EM_LOG_ERROR }}}) {
console.error(str);
} else if (flags & {{{ cDefs.EM_LOG_WARN }}}) {
console.warn(str);
} else if (flags & {{{ cDefs.EM_LOG_INFO }}}) {
console.info(str);
} else if (flags & {{{ cDefs.EM_LOG_DEBUG }}}) {
console.debug(str);
} else {
console.log(str);
}
} else if (flags & {{{ cDefs.EM_LOG_ERROR | cDefs.EM_LOG_WARN }}}) {
err(str);
} else {
out(str);
}
},
emscripten_log__deps: ['$formatString', '$emscriptenLog'],
emscripten_log: (flags, format, varargs) => {
var result = formatString(format, varargs);
var str = UTF8ArrayToString(result, 0);
emscriptenLog(flags, str);
},
// We never free the return values of this function so we need to allocate
// using builtin_malloc to avoid LSan reporting these as leaks.
emscripten_get_compiler_setting__noleakcheck: true,
#if RETAIN_COMPILER_SETTINGS
emscripten_get_compiler_setting__deps: ['$stringToNewUTF8'],
#endif
emscripten_get_compiler_setting: (name) => {
#if RETAIN_COMPILER_SETTINGS
name = UTF8ToString(name);
var ret = getCompilerSetting(name);
if (typeof ret == 'number' || typeof ret == 'boolean') return ret;
if (!_emscripten_get_compiler_setting.cache) _emscripten_get_compiler_setting.cache = {};
var cache = _emscripten_get_compiler_setting.cache;
var fullret = cache[name];
if (fullret) return fullret;
return cache[name] = stringToNewUTF8(ret);
#else
throw 'You must build with -sRETAIN_COMPILER_SETTINGS for getCompilerSetting or emscripten_get_compiler_setting to work';
#endif
},
emscripten_has_asyncify: () => {{{ ASYNCIFY }}},
emscripten_debugger: function() { debugger },
emscripten_print_double__deps: ['$stringToUTF8', '$lengthBytesUTF8'],
emscripten_print_double: (x, to, max) => {
var str = x + '';
if (to) return stringToUTF8(str, to, max);
else return lengthBytesUTF8(str);
},
// Generates a representation of the program counter from a line of stack trace.
// The exact return value depends in whether we are running WASM or JS, and whether
// the engine supports offsets into WASM. See the function body for details.
$convertFrameToPC__docs: '/** @returns {number} */',
$convertFrameToPC__internal: true,
$convertFrameToPC: (frame) => {
#if !USE_OFFSET_CONVERTER
abort('Cannot use convertFrameToPC (needed by __builtin_return_address) without -sUSE_OFFSET_CONVERTER');
#else
#if ASSERTIONS
assert(wasmOffsetConverter);
#endif
var match;
if (match = /\bwasm-function\[\d+\]:(0x[0-9a-f]+)/.exec(frame)) {
// some engines give the binary offset directly, so we use that as return address
return +match[1];
} else if (match = /\bwasm-function\[(\d+)\]:(\d+)/.exec(frame)) {
// other engines only give function index and offset in the function,
// so we try using the offset converter. If that doesn't work,
// we pack index and offset into a "return address"
return wasmOffsetConverter.convert(+match[1], +match[2]);
} else if (match = /:(\d+):\d+(?:\)|$)/.exec(frame)) {
// If we are in js, we can use the js line number as the "return address".
// This should work for wasm2js. We tag the high bit to distinguish this
// from wasm addresses.
return 0x80000000 | +match[1];
}
#endif
// return 0 if we can't find any
return 0;
},
// Returns a representation of a call site of the caller of this function, in a manner
// similar to __builtin_return_address. If level is 0, we return the call site of the
// caller of this function.
emscripten_return_address__deps: ['$convertFrameToPC', '$jsStackTrace'],
emscripten_return_address: (level) => {
var callstack = jsStackTrace().split('\n');
if (callstack[0] == 'Error') {
callstack.shift();
}
// skip this function and the caller to get caller's return address
#if MEMORY64
// MEMORY64 injects and extra wrapper within emscripten_return_address
// to handle BigInt convertions.
var caller = callstack[level + 4];
#else
var caller = callstack[level + 3];
#endif
return convertFrameToPC(caller);
},
$UNWIND_CACHE: {},
// This function pulls the JavaScript stack trace and updates UNWIND_CACHE so
// that our representation of the program counter is mapped to the line of the
// stack trace for every line in the stack trace. This allows
// emscripten_pc_get_* to lookup the line of the stack trace from the PC and
// return meaningful information.
//
// Additionally, it saves a copy of the entire stack trace and the return
// address of the caller. This is because there are two common forms of a
// stack trace. The first form starts the stack trace at the caller of the
// function requesting a stack trace. In this case, the function can simply
// walk down the stack from the return address using emscripten_return_address
// with increasing values for level. The second form starts the stack trace
// at the current function. This requires a helper function to get the program
// counter. This helper function will return the return address. This is the
// program counter at the call site. But there is a problem: when calling into
// code that performs stack unwinding, the program counter has changed since
// execution continued from calling the helper function. So we can't just walk
// down the stack and expect to see the PC value we got. By caching the call
// stack, we can call emscripten_stack_unwind with the PC value and use that
// to unwind the cached stack. Naturally, the PC helper function will have to
// call emscripten_stack_snapshot to cache the stack. We also return the
// return address of the caller so the PC helper function does not need to
// call emscripten_return_address, saving a lot of time.
//
// One might expect that a sensible solution is to call the stack unwinder and
// explicitly tell it how many functions to skip from the stack. However,
// existing libraries do not work this way. For example, compiler-rt's
// sanitizer_common library has macros GET_CALLER_PC_BP_SP and
// GET_CURRENT_PC_BP_SP, which obtains the PC value for the two common cases
// stated above, respectively. Then, it passes the PC, BP, SP values along
// until some other function uses them to unwind. On standard machines, the
// stack can be unwound by treating BP as a linked list. This makes PC
// unnecessary to walk the stack, since walking is done with BP, which remains
// valid until the function returns. But on Emscripten, BP does not exist, at
// least in JavaScript frames, so we have to rely on PC values. Therefore, we
// must be able to unwind from a PC value that may no longer be on the
// execution stack, and so we are forced to cache the entire call stack.
emscripten_stack_snapshot__deps: ['$convertFrameToPC', '$UNWIND_CACHE', '$saveInUnwindCache', '$jsStackTrace'],
emscripten_stack_snapshot: function() {
var callstack = jsStackTrace().split('\n');
if (callstack[0] == 'Error') {
callstack.shift();
}
saveInUnwindCache(callstack);
// Caches the stack snapshot so that emscripten_stack_unwind_buffer() can
// unwind from this spot.
UNWIND_CACHE.last_addr = convertFrameToPC(callstack[3]);
UNWIND_CACHE.last_stack = callstack;
return UNWIND_CACHE.last_addr;
},
$saveInUnwindCache__deps: ['$UNWIND_CACHE', '$convertFrameToPC'],
$saveInUnwindCache__internal: true,
$saveInUnwindCache: (callstack) => {
callstack.forEach((frame) => {
var pc = convertFrameToPC(frame);
if (pc) {
UNWIND_CACHE[pc] = frame;
}
});
},
// Unwinds the stack from a cached PC value. See emscripten_stack_snapshot for
// how this is used. addr must be the return address of the last call to
// emscripten_stack_snapshot, or this function will instead use the current
// call stack.
emscripten_stack_unwind_buffer__deps: ['$UNWIND_CACHE', '$saveInUnwindCache', '$convertFrameToPC', '$jsStackTrace'],
emscripten_stack_unwind_buffer: (addr, buffer, count) => {
var stack;
if (UNWIND_CACHE.last_addr == addr) {
stack = UNWIND_CACHE.last_stack;
} else {
stack = jsStackTrace().split('\n');
if (stack[0] == 'Error') {
stack.shift();
}
saveInUnwindCache(stack);
}
var offset = 3;
while (stack[offset] && convertFrameToPC(stack[offset]) != addr) {
++offset;
}
for (var i = 0; i < count && stack[i+offset]; ++i) {
{{{ makeSetValue('buffer', 'i*4', 'convertFrameToPC(stack[i + offset])', 'i32') }}};
}
return i;
},
// Look up the function name from our stack frame cache with our PC representation.
#if USE_OFFSET_CONVERTER
emscripten_pc_get_function__deps: ['$UNWIND_CACHE', 'free', '$stringToNewUTF8'],
// Don't treat allocation of _emscripten_pc_get_function.ret as a leak
emscripten_pc_get_function__noleakcheck: true,
#endif
emscripten_pc_get_function: (pc) => {
#if !USE_OFFSET_CONVERTER
abort('Cannot use emscripten_pc_get_function without -sUSE_OFFSET_CONVERTER');
return 0;
#else
var name;
if (pc & 0x80000000) {
// If this is a JavaScript function, try looking it up in the unwind cache.
var frame = UNWIND_CACHE[pc];
if (!frame) return 0;
var match;
if (match = /^\s+at (.*) \(.*\)$/.exec(frame)) {
name = match[1];
} else if (match = /^(.+?)@/.exec(frame)) {
name = match[1];
} else {
return 0;
}
} else {
name = wasmOffsetConverter.getName(pc);
}
if (_emscripten_pc_get_function.ret) _free(_emscripten_pc_get_function.ret);
_emscripten_pc_get_function.ret = stringToNewUTF8(name);
return _emscripten_pc_get_function.ret;
#endif
},
$convertPCtoSourceLocation__deps: ['$UNWIND_CACHE', '$convertFrameToPC'],
$convertPCtoSourceLocation: (pc) => {
if (UNWIND_CACHE.last_get_source_pc == pc) return UNWIND_CACHE.last_source;
var match;
var source;
#if LOAD_SOURCE_MAP
if (wasmSourceMap) {
source = wasmSourceMap.lookup(pc);
}
#endif
if (!source) {
var frame = UNWIND_CACHE[pc];
if (!frame) return null;
// Example: at callMain (a.out.js:6335:22)
if (match = /\((.*):(\d+):(\d+)\)$/.exec(frame)) {
source = {file: match[1], line: match[2], column: match[3]};
// Example: [email protected]:1337:42
} else if (match = /@(.*):(\d+):(\d+)/.exec(frame)) {
source = {file: match[1], line: match[2], column: match[3]};
}
}
UNWIND_CACHE.last_get_source_pc = pc;
UNWIND_CACHE.last_source = source;
return source;
},
// Look up the file name from our stack frame cache with our PC representation.
emscripten_pc_get_file__deps: ['$convertPCtoSourceLocation', 'free', '$stringToNewUTF8'],
// Don't treat allocation of _emscripten_pc_get_file.ret as a leak
emscripten_pc_get_file__noleakcheck: true,
emscripten_pc_get_file: (pc) => {
var result = convertPCtoSourceLocation(pc);
if (!result) return 0;
if (_emscripten_pc_get_file.ret) _free(_emscripten_pc_get_file.ret);
_emscripten_pc_get_file.ret = stringToNewUTF8(result.file);
return _emscripten_pc_get_file.ret;
},
// Look up the line number from our stack frame cache with our PC representation.
emscripten_pc_get_line__deps: ['$convertPCtoSourceLocation'],
emscripten_pc_get_line: (pc) => {
var result = convertPCtoSourceLocation(pc);
return result ? result.line : 0;
},
// Look up the column number from our stack frame cache with our PC representation.
emscripten_pc_get_column__deps: ['$convertPCtoSourceLocation'],
emscripten_pc_get_column: (pc) => {
var result = convertPCtoSourceLocation(pc);
return result ? result.column || 0 : 0;
},
emscripten_get_module_name__deps: ['$stringToUTF8'],
emscripten_get_module_name: (buf, length) => {
#if MINIMAL_RUNTIME
return stringToUTF8('{{{ TARGET_BASENAME }}}.wasm', buf, length);
#else
return stringToUTF8(wasmBinaryFile, buf, length);
#endif
},
#if USE_ASAN || USE_LSAN || UBSAN_RUNTIME
// When lsan or asan is enabled withBuiltinMalloc temporarily replaces calls
// to malloc, free, and memalign.
$withBuiltinMalloc__deps: ['emscripten_builtin_malloc', 'emscripten_builtin_free', 'emscripten_builtin_memalign'
],
$withBuiltinMalloc__docs: '/** @suppress{checkTypes} */',
$withBuiltinMalloc: (func) => {
var prev_malloc = typeof _malloc != 'undefined' ? _malloc : undefined;
var prev_memalign = typeof _memalign != 'undefined' ? _memalign : undefined;
var prev_free = typeof _free != 'undefined' ? _free : undefined;
_malloc = _emscripten_builtin_malloc;
_memalign = _emscripten_builtin_memalign;
_free = _emscripten_builtin_free;
try {
return func();
} finally {
_malloc = prev_malloc;
_memalign = prev_memalign;
_free = prev_free;
}
},
_emscripten_sanitizer_use_colors: () => {
var setting = Module['printWithColors'];
if (setting !== undefined) {
return setting;
}
return ENVIRONMENT_IS_NODE && process.stderr.isTTY;
},
_emscripten_sanitizer_get_option__deps: ['$withBuiltinMalloc', '$stringToNewUTF8', '$UTF8ToString'],
_emscripten_sanitizer_get_option__sig: 'pp',
_emscripten_sanitizer_get_option: (name) => {
return withBuiltinMalloc(() => stringToNewUTF8(Module[UTF8ToString(name)] || ""));
},
#endif
$readEmAsmArgsArray: '=[]',
$readEmAsmArgs__deps: [
'$readEmAsmArgsArray',
#if MEMORY64
'$readI53FromI64',
#endif
],
$readEmAsmArgs: (sigPtr, buf) => {
#if ASSERTIONS
// Nobody should have mutated _readEmAsmArgsArray underneath us to be something else than an array.
assert(Array.isArray(readEmAsmArgsArray));
// The input buffer is allocated on the stack, so it must be stack-aligned.
assert(buf % {{{ STACK_ALIGN }}} == 0);
#endif
readEmAsmArgsArray.length = 0;
var ch;
// Most arguments are i32s, so shift the buffer pointer so it is a plain
// index into HEAP32.
while (ch = HEAPU8[sigPtr++]) {
#if ASSERTIONS
var chr = String.fromCharCode(ch);
var validChars = ['d', 'f', 'i', 'p'];
#if WASM_BIGINT
// In WASM_BIGINT mode we support passing i64 values as bigint.
validChars.push('j');
#endif
assert(validChars.includes(chr), `Invalid character ${ch}("${chr}") in readEmAsmArgs! Use only [${validChars}], and do not specify "v" for void return argument.`);
#endif
// Floats are always passed as doubles, so all types except for 'i'
// are 8 bytes and require alignment.
var wide = (ch != {{{ charCode('i') }}});
#if !MEMORY64
wide &= (ch != {{{ charCode('p') }}});
#endif
buf += wide && (buf % 8) ? 4 : 0;
readEmAsmArgsArray.push(
// Special case for pointers under wasm64 or CAN_ADDRESS_2GB mode.
ch == {{{ charCode('p') }}} ? {{{ makeGetValue('buf', 0, '*') }}} :
#if WASM_BIGINT
ch == {{{ charCode('j') }}} ? {{{ makeGetValue('buf', 0, 'i64') }}} :
#endif
ch == {{{ charCode('i') }}} ?
{{{ makeGetValue('buf', 0, 'i32') }}} :
{{{ makeGetValue('buf', 0, 'double') }}}
);
buf += wide ? 8 : 4;
}
return readEmAsmArgsArray;
},
#if HAVE_EM_ASM
$runEmAsmFunction__deps: ['$readEmAsmArgs'],
$runEmAsmFunction: (code, sigPtr, argbuf) => {
var args = readEmAsmArgs(sigPtr, argbuf);
#if ASSERTIONS
if (!ASM_CONSTS.hasOwnProperty(code)) abort(`No EM_ASM constant found at address ${code}`);
#endif
return ASM_CONSTS[code].apply(null, args);
},
emscripten_asm_const_int__deps: ['$runEmAsmFunction'],
emscripten_asm_const_int: (code, sigPtr, argbuf) => {
return runEmAsmFunction(code, sigPtr, argbuf);
},
emscripten_asm_const_double__deps: ['$runEmAsmFunction'],
emscripten_asm_const_double: (code, sigPtr, argbuf) => {
return runEmAsmFunction(code, sigPtr, argbuf);
},
emscripten_asm_const_ptr__deps: ['$runEmAsmFunction'],
emscripten_asm_const_ptr: (code, sigPtr, argbuf) => {
return runEmAsmFunction(code, sigPtr, argbuf);
},
$runMainThreadEmAsm__deps: ['$readEmAsmArgs',
#if PTHREADS
'$proxyToMainThread'
#endif
],
$runMainThreadEmAsm: (code, sigPtr, argbuf, sync) => {
var args = readEmAsmArgs(sigPtr, argbuf);
#if PTHREADS
if (ENVIRONMENT_IS_PTHREAD) {
// EM_ASM functions are variadic, receiving the actual arguments as a buffer
// in memory. the last parameter (argBuf) points to that data. We need to
// always un-variadify that, *before proxying*, as in the async case this
// is a stack allocation that LLVM made, which may go away before the main
// thread gets the message. For that reason we handle proxying *after* the
// call to readEmAsmArgs, and therefore we do that manually here instead
// of using __proxy. (And dor simplicity, do the same in the sync
// case as well, even though it's not strictly necessary, to keep the two
// code paths as similar as possible on both sides.)
// -1 - code is the encoding of a proxied EM_ASM, as a negative number
// (positive numbers are non-EM_ASM calls).
return proxyToMainThread.apply(null, [-1 - code, sync].concat(args));
}
#endif
#if ASSERTIONS
if (!ASM_CONSTS.hasOwnProperty(code)) abort(`No EM_ASM constant found at address ${code}`);
#endif
return ASM_CONSTS[code].apply(null, args);
},
emscripten_asm_const_int_sync_on_main_thread__deps: ['$runMainThreadEmAsm'],
emscripten_asm_const_int_sync_on_main_thread: (code, sigPtr, argbuf) => {
return runMainThreadEmAsm(code, sigPtr, argbuf, 1);
},
emscripten_asm_const_double_sync_on_main_thread: 'emscripten_asm_const_int_sync_on_main_thread',
emscripten_asm_const_async_on_main_thread__deps: ['$runMainThreadEmAsm'],
emscripten_asm_const_async_on_main_thread: (code, sigPtr, argbuf) => runMainThreadEmAsm(code, sigPtr, argbuf, 0),
#endif
#if !DECLARE_ASM_MODULE_EXPORTS
// When DECLARE_ASM_MODULE_EXPORTS is not set we export native symbols
// at runtime rather than statically in JS code.
$exportWasmSymbols__deps: ['$asmjsMangle'],
$exportWasmSymbols: (wasmExports) => {
#if ENVIRONMENT_MAY_BE_NODE && ENVIRONMENT_MAY_BE_WEB
var global_object = (typeof process != "undefined" ? global : this);
#elif ENVIRONMENT_MAY_BE_NODE
var global_object = global;
#else
var global_object = this;
#endif
for (var __exportedFunc in wasmExports) {
var jsname = asmjsMangle(__exportedFunc);
#if MINIMAL_RUNTIME
global_object[jsname] = wasmExports[__exportedFunc];
#else
global_object[jsname] = Module[jsname] = wasmExports[__exportedFunc];
#endif
}
},
#endif
// Parses as much of the given JS string to an integer, with quiet error
// handling (returns a NaN on error). E.g. jstoi_q("123abc") returns 123.
// Note that "smart" radix handling is employed for input string:
// "0314" is parsed as octal, and "0x1234" is parsed as base-16.
$jstoi_q__docs: '/** @suppress {checkTypes} */',
$jstoi_q: (str) => parseInt(str),
// Converts a JS string to an integer base-10, with signaling error
// handling (throws a JS exception on error). E.g. jstoi_s("123abc")
// throws an exception.
$jstoi_s: (str) => Number(str),
#if LINK_AS_CXX
// libunwind
_Unwind_Backtrace__deps: ['$getCallstack'],
_Unwind_Backtrace: (func, arg) => {
var trace = getCallstack();
var parts = trace.split('\n');
for (var i = 0; i < parts.length; i++) {
var ret = {{{ makeDynCall('iii', 'func') }}}(0, arg);
if (ret !== 0) return;
}
},
_Unwind_GetIPInfo: (context, ipBefore) => abort('Unwind_GetIPInfo'),
_Unwind_FindEnclosingFunction: (ip) => 0, // we cannot succeed
_Unwind_RaiseException__deps: ['__cxa_throw'],
_Unwind_RaiseException: (ex) => {
err('Warning: _Unwind_RaiseException is not correctly implemented');
return ___cxa_throw(ex, 0, 0);
},
_Unwind_DeleteException: (ex) => {
err('TODO: Unwind_DeleteException');
},
#endif
// special runtime support
#if STACK_OVERFLOW_CHECK
// Used by wasm-emscripten-finalize to implement STACK_OVERFLOW_CHECK
__handle_stack_overflow__deps: ['emscripten_stack_get_base', 'emscripten_stack_get_end', '$ptrToString'],
__handle_stack_overflow: (requested) => {
var base = _emscripten_stack_get_base();
var end = _emscripten_stack_get_end();
abort(`stack overflow (Attempt to set SP to ${ptrToString(requested)}` +
`, with stack limits [${ptrToString(end)} - ${ptrToString(base)}` +
']). If you require more stack space build with -sSTACK_SIZE=<bytes>');
},
#endif
$getExecutableName: () => {
#if MINIMAL_RUNTIME // MINIMAL_RUNTIME does not have a global runtime variable thisProgram
#if ENVIRONMENT_MAY_BE_NODE
if (ENVIRONMENT_IS_NODE && process.argv.length > 1) {
return process.argv[1].replace(/\\/g, '/');
}
#endif
return "./this.program";
#else
return thisProgram || './this.program';
#endif
},
$listenOnce: (object, event, func) => {
#if MIN_CHROME_VERSION < 55 || MIN_EDGE_VERSION < 18 || MIN_FIREFOX_VERSION < 50 || MIN_IE_VERSION != TARGET_NOT_SUPPORTED // https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener
object.addEventListener(event, function handler() {
func();
object.removeEventListener(event, handler);
});
#else
object.addEventListener(event, func, { 'once': true });
#endif
},
// Receives a Web Audio context plus a set of elements to listen for user
// input events on, and registers a context resume() for them. This lets
// audio work properly in an automatic way, as browsers won't let audio run
// without user interaction.
// If @elements is not provided, we default to the document and canvas
// elements, which handle common use cases.
// TODO(sbc): Remove seemingly unused elements argument
$autoResumeAudioContext__docs: '/** @param {Object=} elements */',
$autoResumeAudioContext__deps: ['$listenOnce'],
$autoResumeAudioContext: (ctx, elements) => {
if (!elements) {
elements = [document, document.getElementById('canvas')];
}
['keydown', 'mousedown', 'touchstart'].forEach((event) => {
elements.forEach((element) => {
if (element) {
listenOnce(element, event, () => {
if (ctx.state === 'suspended') ctx.resume();
});
}
});
});
},
#if DYNCALLS || !WASM_BIGINT
#if MAIN_MODULE == 1
$dynCallLegacy__deps: ['$createDyncallWrapper'],
#endif
$dynCallLegacy: (sig, ptr, args) => {
#if MEMORY64
sig = sig.replace(/p/g, 'j')
#endif
#if ASSERTIONS
#if MINIMAL_RUNTIME
assert(typeof dynCalls != 'undefined', 'Global dynCalls dictionary was not generated in the build! Pass -sDEFAULT_LIBRARY_FUNCS_TO_INCLUDE=$dynCall linker flag to include it!');
assert(sig in dynCalls, `bad function pointer type - sig is not in dynCalls: '${sig}'`);
#else
assert(('dynCall_' + sig) in Module, `bad function pointer type - dynCall function not found for sig '${sig}'`);
#endif
if (args && args.length) {
#if WASM_BIGINT
// j (64-bit integer) is fine, and is implemented as a BigInt. Without
// legalization, the number of parameters should match (j is not expanded
// into two i's).
assert(args.length === sig.length - 1);
#else
// j (64-bit integer) must be passed in as two numbers [low 32, high 32].
assert(args.length === sig.substring(1).replace(/j/g, '--').length);
#endif
} else {
assert(sig.length == 1);
}
#endif
#if MINIMAL_RUNTIME
var f = dynCalls[sig];
#else
#if MAIN_MODULE == 1
if (!('dynCall_' + sig in Module)) {
Module['dynCall_' + sig] = createDyncallWrapper(sig);
}
#endif
var f = Module['dynCall_' + sig];
#endif
return args && args.length ? f.apply(null, [ptr].concat(args)) : f.call(null, ptr);
},
$dynCall__deps: ['$dynCallLegacy', '$getWasmTableEntry'],
#endif
// Used in library code to get JS function from wasm function pointer.
// All callers should use direct table access where possible and only fall
// back to this function if needed.
$getDynCaller__deps: ['$dynCall'],
$getDynCaller: (sig, ptr) => {
#if ASSERTIONS && !DYNCALLS
assert(sig.includes('j') || sig.includes('p'), 'getDynCaller should only be called with i64 sigs')
#endif
var argCache = [];
return function() {
argCache.length = 0;
Object.assign(argCache, arguments);
return dynCall(sig, ptr, argCache);
};
},
$dynCall__docs: '/** @param {Object=} args */',
$dynCall: (sig, ptr, args) => {
#if MEMORY64
// With MEMORY64 we have an additional step to convert `p` arguments to
// bigint. This is the runtime equivalent of the wrappers we create for wasm
// exports in `emscripten.py:create_wasm64_wrappers`.
for (var i = 1; i < sig.length; ++i) {
if (sig[i] == 'p') args[i-1] = BigInt(args[i-1]);
}
#endif
#if DYNCALLS
var rtn = dynCallLegacy(sig, ptr, args);
#else
#if !WASM_BIGINT
// Without WASM_BIGINT support we cannot directly call function with i64 as
// part of thier signature, so we rely the dynCall functions generated by
// wasm-emscripten-finalize
if (sig.includes('j')) {
return dynCallLegacy(sig, ptr, args);
}
#endif
#if ASSERTIONS
assert(getWasmTableEntry(ptr), `missing table entry in dynCall: ${ptr}`);
#endif
var rtn = getWasmTableEntry(ptr).apply(null, args);
#endif
#if MEMORY64
return sig[0] == 'p' ? Number(rtn) : rtn;
#else
return rtn;
#endif
},
$callRuntimeCallbacks__internal: true,
$callRuntimeCallbacks: (callbacks) => {
while (callbacks.length > 0) {
// Pass the module as the first argument.
callbacks.shift()(Module);
}
},
#if SHRINK_LEVEL == 0 || ASYNCIFY == 2
// A mirror copy of contents of wasmTable in JS side, to avoid relatively
// slow wasmTable.get() call. Only used when not compiling with -Os, -Oz, or
// JSPI which needs to instrument the functions.
$wasmTableMirror__internal: true,
$wasmTableMirror: [],
$setWasmTableEntry__internal: true,
$setWasmTableEntry__deps: ['$wasmTableMirror', '$wasmTable'],
$setWasmTableEntry: (idx, func) => {
wasmTable.set(idx, func);
// With ABORT_ON_WASM_EXCEPTIONS wasmTable.get is overriden to return wrapped
// functions so we need to call it here to retrieve the potential wrapper correctly
// instead of just storing 'func' directly into wasmTableMirror
wasmTableMirror[idx] = wasmTable.get(idx);
},
$getWasmTableEntry__internal: true,
$getWasmTableEntry__deps: ['$wasmTableMirror', '$wasmTable'],
$getWasmTableEntry: (funcPtr) => {
#if MEMORY64
// Function pointers are 64-bit, but wasmTable.get() requires a Number.
// https://github.com/emscripten-core/emscripten/issues/18200
funcPtr = Number(funcPtr);
#endif
var func = wasmTableMirror[funcPtr];
if (!func) {
if (funcPtr >= wasmTableMirror.length) wasmTableMirror.length = funcPtr + 1;
wasmTableMirror[funcPtr] = func = wasmTable.get(funcPtr);
#if ASYNCIFY == 2
if (Asyncify.isAsyncExport(func)) {
wasmTableMirror[funcPtr] = func = Asyncify.makeAsyncFunction(func);
}
#endif
}
#if ASSERTIONS && ASYNCIFY != 2 // With JSPI the function stored in the table will be a wrapper.
assert(wasmTable.get(funcPtr) == func, "JavaScript-side Wasm function table mirror is out of date!");
#endif
return func;
},
#else
$setWasmTableEntry__deps: ['$wasmTable'],
$setWasmTableEntry: (idx, func) => wasmTable.set(idx, func),
$getWasmTableEntry__deps: ['$wasmTable'],
$getWasmTableEntry: (funcPtr) => {
#if MEMORY64
// Function pointers are 64-bit, but wasmTable.get() requires a Number.
// https://github.com/emscripten-core/emscripten/issues/18200
funcPtr = Number(funcPtr);
#endif
// In -Os and -Oz builds, do not implement a JS side wasm table mirror for small
// code size, but directly access wasmTable, which is a bit slower as uncached.
return wasmTable.get(funcPtr);
},
#endif // SHRINK_LEVEL == 0
// Callable in pthread without __proxy needed.
emscripten_exit_with_live_runtime: () => {
{{{ runtimeKeepalivePush() }}}
throw 'unwind';
},
emscripten_force_exit__deps: ['exit',
#if !EXIT_RUNTIME && ASSERTIONS
'$warnOnce',
#endif
],
emscripten_force_exit__proxy: 'sync',
emscripten_force_exit: (status) => {
#if RUNTIME_DEBUG
dbg('emscripten_force_exit');
#endif
#if !EXIT_RUNTIME && ASSERTIONS
warnOnce('emscripten_force_exit cannot actually shut down the runtime, as the build does not have EXIT_RUNTIME set');
#endif
#if !MINIMAL_RUNTIME
noExitRuntime = false;
runtimeKeepaliveCounter = 0;
#endif
_exit(status);
},
emscripten_out: (str) => out(UTF8ToString(str)),
emscripten_outn: (str, len) => out(UTF8ToString(str, len)),
emscripten_err: (str) => err(UTF8ToString(str)),
emscripten_errn: (str, len) => err(UTF8ToString(str, len)),
#if ASSERTIONS || RUNTIME_DEBUG
emscripten_dbg: (str) => dbg(UTF8ToString(str)),
emscripten_dbgn: (str, len) => dbg(UTF8ToString(str, len)),
#endif
// Use program_invocation_short_name and program_invocation_name in compiled
// programs. This function is for implementing them.
#if !MINIMAL_RUNTIME
_emscripten_get_progname__deps: ['$stringToUTF8'],
#endif
_emscripten_get_progname: (str, len) => {
#if !MINIMAL_RUNTIME
#if ASSERTIONS
assert(typeof str == 'number');
assert(typeof len == 'number');
#endif
stringToUTF8(thisProgram, str, len);
#endif
},
emscripten_console_log: (str) => {
#if ASSERTIONS
assert(typeof str == 'number');
#endif
console.log(UTF8ToString(str));
},
emscripten_console_warn: (str) => {
#if ASSERTIONS
assert(typeof str == 'number');
#endif
console.warn(UTF8ToString(str));
},
emscripten_console_error: (str) => {
#if ASSERTIONS
assert(typeof str == 'number');
#endif
console.error(UTF8ToString(str));
},
emscripten_throw_number: (number) => {
throw number;
},
emscripten_throw_string: (str) => {
#if ASSERTIONS
assert(typeof str == 'number');
#endif
throw UTF8ToString(str);
},
#if !MINIMAL_RUNTIME
#if STACK_OVERFLOW_CHECK
$handleException__deps: ['emscripten_stack_get_current'],
#endif
$handleException: (e) => {
// Certain exception types we do not treat as errors since they are used for
// internal control flow.
// 1. ExitStatus, which is thrown by exit()
// 2. "unwind", which is thrown by emscripten_unwind_to_js_event_loop() and others
// that wish to return to JS event loop.
if (e instanceof ExitStatus || e == 'unwind') {
#if RUNTIME_DEBUG
dbg(`handleException: unwinding: EXITSTATUS=${EXITSTATUS}`);
#endif
return EXITSTATUS;
}
#if STACK_OVERFLOW_CHECK
checkStackCookie();
if (e instanceof WebAssembly.RuntimeError) {
if (_emscripten_stack_get_current() <= 0) {
err('Stack overflow detected. You can try increasing -sSTACK_SIZE (currently set to {{{ STACK_SIZE }}})');
}
}
#endif
#if MINIMAL_RUNTIME
throw e;
#else
quit_(1, e);
#endif
},
// Callable in pthread without __proxy needed.
$runtimeKeepalivePush__sig: 'v',
$runtimeKeepalivePush: () => {
runtimeKeepaliveCounter += 1;
#if RUNTIME_DEBUG
dbg(`runtimeKeepalivePush -> counter=${runtimeKeepaliveCounter}`);
#endif
},
$runtimeKeepalivePop__sig: 'v',
$runtimeKeepalivePop: () => {
#if ASSERTIONS
assert(runtimeKeepaliveCounter > 0);
#endif
runtimeKeepaliveCounter -= 1;
#if RUNTIME_DEBUG
dbg(`runtimeKeepalivePop -> counter=${runtimeKeepaliveCounter}`);
#endif
},
emscripten_runtime_keepalive_push: '$runtimeKeepalivePush',
emscripten_runtime_keepalive_pop: '$runtimeKeepalivePop',
// keepRuntimeAlive is a runtime function rather than a library function,
// so we can't use an alias like we do for the two functions above.
emscripten_runtime_keepalive_check: () => keepRuntimeAlive(),
// Used to call user callbacks from the embedder / event loop. For example
// setTimeout or any other kind of event handler that calls into user case
// needs to use this wrapper.
//
// The job of this wrapper is the handle emscripten-specfic exceptions such
// as ExitStatus and 'unwind' and prevent these from escaping to the top
// level.
$callUserCallback__deps: ['$handleException', '$maybeExit'],
$callUserCallback: (func) => {
#if EXIT_RUNTIME
if (runtimeExited || ABORT) {
#else
if (ABORT) {
#endif
#if ASSERTIONS
err('user callback triggered after runtime exited or application aborted. Ignoring.');
#endif
return;
}
try {
func();
maybeExit();
} catch (e) {
handleException(e);
}
},
$maybeExit__deps: ['exit', '$handleException',
#if PTHREADS
'_emscripten_thread_exit',
#endif
],
$maybeExit: () => {
#if EXIT_RUNTIME
if (runtimeExited) {
return;
}
#endif
#if RUNTIME_DEBUG
dbg(`maybeExit: user callback done: runtimeKeepaliveCounter=${runtimeKeepaliveCounter}`);
#endif
if (!keepRuntimeAlive()) {
#if RUNTIME_DEBUG
dbg(`maybeExit: calling exit() implicitly after user callback completed: ${EXITSTATUS}`);
#endif
try {
#if PTHREADS
if (ENVIRONMENT_IS_PTHREAD) __emscripten_thread_exit(EXITSTATUS);
else
#endif
_exit(EXITSTATUS);
} catch (e) {
handleException(e);
}
}
},
#else // MINIMAL_RUNTIME
// MINIMAL_RUNTIME doesn't support the runtimeKeepalive stuff
$callUserCallback: (func) => {
func();
},
#endif // MINIMAL_RUNTIME
$safeSetTimeout__deps: ['$callUserCallback'],
$safeSetTimeout__docs: '/** @param {number=} timeout */',
$safeSetTimeout: (func, timeout) => {
{{{ runtimeKeepalivePush() }}}
return setTimeout(() => {
{{{ runtimeKeepalivePop() }}}
callUserCallback(func);
}, timeout);
},
$asmjsMangle: (x) => {
var unmangledSymbols = {{{ buildStringArray(WASM_SYSTEM_EXPORTS) }}};
if (x == '__main_argc_argv') {
x = 'main';
}
return x.indexOf('dynCall_') == 0 || unmangledSymbols.includes(x) ? x : '_' + x;
},
$asyncLoad__docs: '/** @param {boolean=} noRunDep */',
$asyncLoad: (url, onload, onerror, noRunDep) => {
var dep = !noRunDep ? getUniqueRunDependency(`al ${url}`) : '';
readAsync(url, (arrayBuffer) => {
assert(arrayBuffer, `Loading data file "${url}" failed (no arrayBuffer).`);
onload(new Uint8Array(arrayBuffer));
if (dep) removeRunDependency(dep);
}, (event) => {
if (onerror) {
onerror();
} else {
throw `Loading data file "${url}" failed.`;
}
});
if (dep) addRunDependency(dep);
},
$alignMemory: (size, alignment) => {
#if ASSERTIONS
assert(alignment, "alignment argument is required");
#endif
return Math.ceil(size / alignment) * alignment;
},
// Allocate memory for an mmap operation. This allocates space of the right
// page-aligned size, and clears the allocated space.
$mmapAlloc__deps: ['$zeroMemory', '$alignMemory'],
$mmapAlloc: (size) => {
#if hasExportedSymbol('emscripten_builtin_memalign')
size = alignMemory(size, {{{ WASM_PAGE_SIZE }}});
var ptr = _emscripten_builtin_memalign({{{ WASM_PAGE_SIZE }}}, size);
if (!ptr) return 0;
return zeroMemory(ptr, size);
#elif ASSERTIONS
abort('internal error: mmapAlloc called but `emscripten_builtin_memalign` native symbol not exported');
#else
abort();
#endif
},
#if RELOCATABLE
// Globals that are normally exported from the wasm module but in relocatable
// mode are created here and imported by the module.
__stack_pointer: "new WebAssembly.Global({'value': '{{{ POINTER_WASM_TYPE }}}', 'mutable': true}, {{{ to64(STACK_HIGH) }}})",
// tell the memory segments where to place themselves
__memory_base: "new WebAssembly.Global({'value': '{{{ POINTER_WASM_TYPE }}}', 'mutable': false}, {{{ to64(GLOBAL_BASE) }}})",
// the wasm backend reserves slot 0 for the NULL function pointer
__table_base: "new WebAssembly.Global({'value': '{{{ POINTER_WASM_TYPE }}}', 'mutable': false}, {{{ to64(TABLE_BASE) }}})",
#if MEMORY64 == 2
__memory_base32: "new WebAssembly.Global({'value': 'i32', 'mutable': false}, {{{ GLOBAL_BASE }}})",
#endif
#if MEMORY64
__table_base32: {{{ TABLE_BASE }}},
#endif
// To support such allocations during startup, track them on __heap_base and
// then when the main module is loaded it reads that value and uses it to
// initialize sbrk (the main module is relocatable itself, and so it does not
// have __heap_base hardcoded into it - it receives it from JS as an extern
// global, basically).
__heap_base: '{{{ HEAP_BASE }}}',
__stack_high: '{{{ STACK_HIGH }}}',
__stack_low: '{{{ STACK_LOW }}}',
__global_base: '{{{ GLOBAL_BASE }}}',
#if WASM_EXCEPTIONS
// In dynamic linking we define tags here and feed them to each module
__cpp_exception: "new WebAssembly.Tag({'parameters': ['{{{ POINTER_WASM_TYPE }}}']})",
#endif
#if SUPPORT_LONGJMP == 'wasm'
__c_longjmp: "new WebAssembly.Tag({'parameters': ['{{{ POINTER_WASM_TYPE }}}']})",
#endif
#if ASYNCIFY == 1
__asyncify_state: "new WebAssembly.Global({'value': 'i32', 'mutable': true}, 0)",
__asyncify_data: "new WebAssembly.Global({'value': '{{{ POINTER_WASM_TYPE }}}', 'mutable': true}, {{{ to64(0) }}})",
#endif
#endif
_emscripten_fs_load_embedded_files__deps: ['$FS', '$PATH'],
_emscripten_fs_load_embedded_files: (ptr) => {
#if RUNTIME_DEBUG
dbg('preloading data files');
#endif
do {
var name_addr = {{{ makeGetValue('ptr', '0', '*') }}};
ptr += {{{ POINTER_SIZE }}};
var len = {{{ makeGetValue('ptr', '0', '*') }}};
ptr += {{{ POINTER_SIZE }}};
var content = {{{ makeGetValue('ptr', '0', '*') }}};
ptr += {{{ POINTER_SIZE }}};
var name = UTF8ToString(name_addr)
#if RUNTIME_DEBUG
dbg(`preloading files: ${name}`);
#endif
FS.createPath('/', PATH.dirname(name), true, true);
// canOwn this data in the filesystem, it is a slice of wasm memory that will never change
FS.createDataFile(name, null, HEAP8.subarray(content, content + len), true, true, true);
} while ({{{ makeGetValue('ptr', '0', '*') }}});
#if RUNTIME_DEBUG
dbg('done preloading data files');
#endif
},
$handleAllocatorInit: function() {
Object.assign(HandleAllocator.prototype, /** @lends {HandleAllocator.prototype} */ {
get(id) {
#if ASSERTIONS
assert(this.allocated[id] !== undefined, `invalid handle: ${id}`);
#endif
return this.allocated[id];
},
has(id) {
return this.allocated[id] !== undefined;
},
allocate(handle) {
var id = this.freelist.pop() || this.allocated.length;
this.allocated[id] = handle;
return id;
},
free(id) {
#if ASSERTIONS
assert(this.allocated[id] !== undefined);
#endif
// Set the slot to `undefined` rather than using `delete` here since
// apparently arrays with holes in them can be less efficient.
this.allocated[id] = undefined;
this.freelist.push(id);
}
});
},
$HandleAllocator__postset: 'handleAllocatorInit()',
$HandleAllocator__deps: ['$handleAllocatorInit'],
$HandleAllocator__docs: '/** @constructor */',
$HandleAllocator: function() {
// Reserve slot 0 so that 0 is always an invalid handle
this.allocated = [undefined];
this.freelist = [];
},
$getNativeTypeSize__deps: ['$POINTER_SIZE'],
$getNativeTypeSize: {{{ getNativeTypeSize }}},
#if RELOCATABLE
// In RELOCATABLE mode we create the table in JS.
$wasmTable: `=new WebAssembly.Table({
'initial': {{{ INITIAL_TABLE }}},
#if !ALLOW_TABLE_GROWTH
'maximum': {{{ INITIAL_TABLE }}},
#endif
'element': 'anyfunc'
});
`,
#else
$wasmTable: undefined,
#endif
// We used to define these globals unconditionally in support code.
// Instead, we now define them here so folks can pull it in explicitly, on
// demand.
$STACK_SIZE: {{{ STACK_SIZE }}},
$STACK_ALIGN: {{{ STACK_ALIGN }}},
$POINTER_SIZE: {{{ POINTER_SIZE }}},
$ASSERTIONS: {{{ ASSERTIONS }}},
});
function autoAddDeps(object, name) {
for (var item in object) {
if (!item.endsWith('__deps')) {
if (!object[item + '__deps']) {
object[item + '__deps'] = [];
}
object[item + '__deps'].push(name);
}
}
}
#if LEGACY_RUNTIME
// Library functions that were previously included as runtime functions are
// automatically included when `LEGACY_RUNTIME` is set.
DEFAULT_LIBRARY_FUNCS_TO_INCLUDE.push(
'$addFunction',
'$removeFunction',
'$allocate',
'$ALLOC_NORMAL',
'$ALLOC_STACK',
'$AsciiToString',
'$stringToAscii',
'$UTF16ToString',
'$stringToUTF16',
'$lengthBytesUTF16',
'$UTF32ToString',
'$stringToUTF32',
'$lengthBytesUTF32',
'$stringToNewUTF8',
'$stringToUTF8OnStack',
'$writeStringToMemory',
'$writeArrayToMemory',
'$writeAsciiToMemory',
'$intArrayFromString',
'$intArrayToString',
'$warnOnce',
'$ccall',
'$cwrap',
'$ExitStatus',
'$UTF8ArrayToString',
'$UTF8ToString',
'$stringToUTF8Array',
'$stringToUTF8',
'$lengthBytesUTF8',
);
#endif
function wrapSyscallFunction(x, library, isWasi) {
if (isJsOnlySymbol(x) || isDecorator(x)) {
return;
}
var t = library[x];
if (typeof t == 'string') return;
t = t.toString();
// If a syscall uses FS, but !SYSCALLS_REQUIRE_FILESYSTEM, then the user
// has disabled the filesystem or we have proven some other way that this will
// not be called in practice, and do not need that code.
if (!SYSCALLS_REQUIRE_FILESYSTEM && t.includes('FS.')) {
t = modifyJSFunction(t, (args, body) => {
return `(${args}) => {\n` +
(ASSERTIONS ? "abort('it should not be possible to operate on streams when !SYSCALLS_REQUIRE_FILESYSTEM');\n" : '') +
'}';
});
}
var isVariadic = !isWasi && t.includes(', varargs');
#if SYSCALLS_REQUIRE_FILESYSTEM == 0
var canThrow = false;
#else
var canThrow = library[x + '__nothrow'] !== true;
#endif
if (!library[x + '__deps']) library[x + '__deps'] = [];
#if PURE_WASI
// In PURE_WASI mode we can't assume the wasm binary was built by emscripten
// and politely notify us on memory growth. Instead we have to check for
// possible memory growth on each syscall.
var pre = '\nif (!HEAPU8.byteLength) _emscripten_notify_memory_growth(0);\n'
library[x + '__deps'].push('emscripten_notify_memory_growth');
#else
var pre = '';
#endif
var post = '';
if (isVariadic) {
pre += 'SYSCALLS.varargs = varargs;\n';
}
#if SYSCALL_DEBUG
if (isVariadic) {
if (canThrow) {
post += 'finally { SYSCALLS.varargs = undefined; }\n';
} else {
post += 'SYSCALLS.varargs = undefined;\n';
}
}
pre += `dbg('syscall! ${x}: [' + Array.prototype.slice.call(arguments) + ']');\n`;
pre += "var canWarn = true;\n";
pre += "var ret = (() => {";
post += "})();\n";
post += "if (ret && ret < 0 && canWarn) {\n";
post += " dbg(`error: syscall may have failed with ${-ret} (${ERRNO_MESSAGES[-ret]})`);\n";
post += "}\n";
post += "dbg(`syscall return: ${ret}`);\n";
post += "return ret;\n";
#endif
delete library[x + '__nothrow'];
var handler = '';
if (canThrow) {
pre += 'try {\n';
handler +=
"} catch (e) {\n" +
" if (typeof FS == 'undefined' || !(e.name === 'ErrnoError')) throw e;\n";
#if SYSCALL_DEBUG
handler +=
" dbg(`error: syscall failed with ${e.errno} (${ERRNO_MESSAGES[e.errno]})`);\n" +
" canWarn = false;\n";
#endif
// Musl syscalls are negated.
if (isWasi) {
handler += " return e.errno;\n";
} else {
// Musl syscalls are negated.
handler += " return -e.errno;\n";
}
handler += "}\n";
}
post = handler + post;
if (pre || post) {
t = modifyJSFunction(t, (args, body) => `function (${args}) {\n${pre}${body}${post}}\n`);
}
library[x] = eval('(' + t + ')');
if (!WASMFS) {
library[x + '__deps'].push('$SYSCALLS');
}
#if PTHREADS
// Most syscalls need to happen on the main JS thread (e.g. because the
// filesystem is in JS and on that thread). Proxy synchronously to there.
// There are some exceptions, syscalls that we know are ok to just run in
// any thread; those are marked as not being proxied with
// __proxy: false
// A syscall without a return value could perhaps be proxied asynchronously
// instead of synchronously, and marked with
// __proxy: 'async'
// (but essentially all syscalls do have return values).
if (library[x + '__proxy'] === undefined) {
library[x + '__proxy'] = 'sync';
}
#endif
}