RegExpRunStatus
RegExpShared::execute(JSContext *cx, const jschar *chars, size_t length,
size_t *lastIndex, MatchPairs &matches)
{
/* Protect inlined chars from root analysis poisoning. */
SkipRoot skip(cx, &chars);
/* Compile the code at point-of-use. */
if (!compileIfNecessary(cx))
return RegExpRunStatus_Error;
/* Ensure sufficient memory for output vector. */
if (!matches.initArray(pairCount()))
return RegExpRunStatus_Error;
/*
* |displacement| emulates sticky mode by matching from this offset
* into the char buffer and subtracting the delta off at the end.
*/
size_t origLength = length;
size_t start = *lastIndex;
size_t displacement = 0;
if (sticky()) {
displacement = start;
chars += displacement;
length -= displacement;
start = 0;
}
unsigned *outputBuf = matches.rawBuf();
unsigned result;
#if ENABLE_YARR_JIT
if (codeBlock.isFallBack())
result = JSC::Yarr::interpret(cx, bytecode, chars, length, start, outputBuf);
else
result = codeBlock.execute(chars, start, length, (int *)outputBuf).start;
#else
result = JSC::Yarr::interpret(cx, bytecode, chars, length, start, outputBuf);
#endif
if (result == JSC::Yarr::offsetNoMatch)
return RegExpRunStatus_Success_NotFound;
matches.displace(displacement);
matches.checkAgainst(origLength);
*lastIndex = matches[0].limit;
return RegExpRunStatus_Success;
}
RegExpRunStatus
RegExpShared::execute(JSContext *cx, const jschar *chars, size_t length,
size_t *lastIndex, MatchPairs &matches)
{
TraceLogger *logger = TraceLoggerForMainThread(cx->runtime());
{
/* Compile the code at point-of-use. */
AutoTraceLog logCompile(logger, TraceLogger::YarrCompile);
if (!compileIfNecessary(cx))
return RegExpRunStatus_Error;
}
/* Ensure sufficient memory for output vector. */
if (!matches.initArray(pairCount()))
return RegExpRunStatus_Error;
/*
* |displacement| emulates sticky mode by matching from this offset
* into the char buffer and subtracting the delta off at the end.
*/
size_t origLength = length;
size_t start = *lastIndex;
size_t displacement = 0;
if (sticky()) {
displacement = start;
chars += displacement;
length -= displacement;
start = 0;
}
unsigned *outputBuf = matches.rawBuf();
unsigned result;
#if ENABLE_YARR_JIT
if (codeBlock.isFallBack()) {
AutoTraceLog logInterpret(logger, TraceLogger::YarrInterpret);
result = JSC::Yarr::interpret(cx, bytecode, chars, length, start, outputBuf);
} else {
AutoTraceLog logJIT(logger, TraceLogger::YarrJIT);
result = codeBlock.execute(chars, start, length, (int *)outputBuf).start;
}
#else
{
AutoTraceLog logInterpret(logger, TraceLogger::YarrInterpret);
result = JSC::Yarr::interpret(cx, bytecode, chars, length, start, outputBuf);
}
#endif
if (result == JSC::Yarr::offsetError) {
reportYarrError(cx, nullptr, JSC::Yarr::RuntimeError);
return RegExpRunStatus_Error;
}
if (result == JSC::Yarr::offsetNoMatch)
return RegExpRunStatus_Success_NotFound;
matches.displace(displacement);
matches.checkAgainst(origLength);
*lastIndex = matches[0].limit;
return RegExpRunStatus_Success;
}