diff options
Diffstat (limited to 'JavaScriptCore/runtime/JSString.h')
| -rw-r--r-- | JavaScriptCore/runtime/JSString.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/JavaScriptCore/runtime/JSString.h b/JavaScriptCore/runtime/JSString.h index 51b9f2d..fefffde 100644 --- a/JavaScriptCore/runtime/JSString.h +++ b/JavaScriptCore/runtime/JSString.h @@ -356,6 +356,7 @@ namespace JSC { } void resolveRope(ExecState*) const; + JSString* substringFromRope(ExecState*, unsigned offset, unsigned length); void appendStringInConstruct(unsigned& index, const UString& string) { @@ -435,6 +436,7 @@ namespace JSC { friend JSValue jsString(ExecState* exec, Register* strings, unsigned count); friend JSValue jsString(ExecState* exec, JSValue thisValue); friend JSString* jsStringWithFinalizer(ExecState*, const UString&, JSStringFinalizerCallback callback, void* context); + friend JSString* jsSubstring(ExecState* exec, JSString* s, unsigned offset, unsigned length); }; JSString* asString(JSValue); @@ -519,6 +521,19 @@ namespace JSC { JSGlobalData* globalData = &exec->globalData(); return fixupVPtr(globalData, new (globalData) JSString(globalData, s, callback, context)); } + + inline JSString* jsSubstring(ExecState* exec, JSString* s, unsigned offset, unsigned length) + { + ASSERT(offset <= static_cast<unsigned>(s->length())); + ASSERT(length <= static_cast<unsigned>(s->length())); + ASSERT(offset + length <= static_cast<unsigned>(s->length())); + JSGlobalData* globalData = &exec->globalData(); + if (!length) + return globalData->smallStrings.emptyString(globalData); + if (s->isRope()) + return s->substringFromRope(exec, offset, length); + return jsSubstring(globalData, s->m_value, offset, length); + } inline JSString* jsSubstring(JSGlobalData* globalData, const UString& s, unsigned offset, unsigned length) { |