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How to embed the JavaScript engine
for jsautocompartment jsautocompartment ac(cx, global); js_initstandardclasses(cx, global); const char *script = "'hello'+'world, it is '+new date()"; const char *filename = "noname"; int lineno = 1; bool ok = js_evaluatescript(cx, global, script, strlen(script), filename, lineno, rval.address()); if (!ok) return 1; }
jsstring *str = rval.tostring(); printf("%s\n", js_encodestring(cx, str)); } js_destroycontext(cx); js_destroyruntime(rt); js_shutdown(); return 0; } spidermonkey 31 // following code might be needed in some case // #define __stdc_limit_macros // #include <stdint.h> #include "jsapi.h" /* the class of the global object.
...// scope for jsautocompartment jsautocompartment ac(cx, global); js_initstandardclasses(cx, global); const char *script = "'hello'+'world, it is '+new date()"; const char *filename = "noname"; int lineno = 1; bool ok = js_evaluatescript(cx, global, script, strlen(script), filename, lineno, &rval); if (!ok) return 1; }
jsstring *str = rval.tostring(); printf("%s\n", js_encodestring(cx, str)); } js_destroycontext(cx); js_destroyruntime(rt); js_shutdown(); return 0; } spidermonkey 38 // following code might be needed in some case // #define __stdc_limit_macros // #include <stdint.h> #include "jsapi.h" /* the class of the global object.
...bal); js_initstandardclasses(cx, global); const char *script = "'hello'+'world, it is '+new date()"; const char *filename = "noname"; int lineno = 1; js::compileoptions opts(cx); opts.setfileandline(filename, lineno); bool ok = js::evaluate(cx, global, opts, script, strlen(script), &rval); if (!ok) return 1; }
jsstring *str = rval.tostring(); printf("%s\n", js_encodestring(cx, str)); } js_destroycontext(cx); js_destroyruntime(rt); js_shutdown(); return 0; } spidermonkey 45 // following code might be needed in some case // #define __stdc_limit_macros // #include <stdint.h> #include "jsapi.h" #include "js/initialization.h" /* the class of the global object.
...And 2 more matches
Index
176 jsval_to_string jsapi reference, obsolete, spidermonkey jsval_to_string casts the argument, v, to type
jsstring *.
... 267 js_forget_string_flatness jsapi reference, reference, référence(2), spidermonkey js_forget_string_flatness converts jsflatstring * to
jsstring *.
... 362 js_internjsstring jsapi reference, reference, référence(2), spidermonkey js_internjsstring converts a string str to interned string (interned atom) and returns the result string as
jsstring *.
...And 2 more matches
JSAutoByteString
syntax jsautobytestring str; jsautobytestring(jscontext *cx,
jsstring *str); name type description cx jscontext * the context in which to add the root.
... str
jsstring * a pointer to jsstring to get initial content by calling js_encodestring(cx, str).
... char *encodelatin1(jscontext *cx,
jsstring *str) call js_encodestring and take ownership of the returned string, and return the string.
...And 2 more matches
JS::CompileOptions
if one assigns a function, that function's script's source does not belong to the dom element; the function's definition must appear elsewhere.)
jsstring *elementattributename() const if this source belongs to a dom element because it is an event handler content attribute or an event handler idl attribute, this returns the name of that attribute, a string.
... owningcompileoptions &setelement(jsobject *e) owningcompileoptions &setelementattributename(
jsstring *p) owningcompileoptions &setintroductionscript(jsscript *s) owningcompileoptions &setmutederrors(bool mute) owningcompileoptions &setversion(jsversion v) owningcompileoptions &setutf8(bool u) owningcompileoptions &setcolumn(unsigned c) owningcompileoptions &setcompileandgo(bool cng) owningcompileoptions &setforeval(bool eval) ...
...
jsstring *elementattributename() const jsscript *introductionscript() const compileoptions &setfile(const char *f) sets each property and returns the instance itself.
... compileoptions &setline(unsigned l) compileoptions &setfileandline(const char *f, unsigned l) compileoptions &setsourcemapurl(const char16_t *s) compileoptions &setelement(jsobject *e) compileoptions &setelementattributename(
jsstring *p) compileoptions &setintroductionscript(jsscript *s) compileoptions &setmutederrors(bool mute) compileoptions &setversion(jsversion v) compileoptions &setutf8(bool u) compileoptions &setcolumn(unsigned c) compileoptions &setcompileandgo(bool cng) compileoptions &setforeval(bool eval) compileoptions &setnoscriptrval(bool nsr) compileoptions &setselfhostingmode(bool shm) compileoptions &setcanlazilyparse(bool clp) compileoption...
JS::Add*Root
syntax bool js::addvalueroot(jscontext *cx, js::heap<js::value> *vp); bool js::addstringroot(jscontext *cx, js::heap<
jsstring *> *rp); bool js::addobjectroot(jscontext *cx, js::heap<jsobject *> *rp); bool js::addnamedvalueroot(jscontext *cx, js::heap<js::value> *vp, const char *name); bool js::addnamedvaluerootrt(jsruntime *rt, js::heap<js::value> *vp, const char *name); bool js::addnamedstringroot(jscontext *cx, js::heap<
jsstring *> *rp, const char ...
... rp js::heap<
jsstring *> the address of the
jsstring * variable to root.
... vp/rp is the address of a c/c++ variable (or field, or array element) of type js::value,
jsstring *, jsobject *, or jsscript *.
JSID_IS_STRING
syntax bool jsid_is_string(jsid id);
jsstring * jsid_to_string(jsid id); jsid interned_string_to_jsid(jscontext *cx,
jsstring *str); // added in spidermonkey 38 jsflatstring * jsid_to_flat_string(jsid id); // added in spidermonkey 17 name type description cx jscontext * pointer to a js context from which to derive runtime information.
... str
jsstring * an interned string to convert to an id.
... jsid_to_string converts a specified js id, id to a
jsstring *.
JSVAL_TO_STRING
cast a jsval to type
jsstring * without a type check.
... syntax
jsstring * jsval_to_string(jsval v); description jsval_to_string casts the argument, v, to type
jsstring *.
...(the difference is that the latter will convert an object, array, number, or other value to a string in a type-safe way, creating a new string if needed.) to convert the return type of this macro (
jsstring *) to a char pointer, use js_getstringbytes.
JS_Add*Root
syntax jsbool js_addvalueroot(jscontext *cx, jsval *vp); jsbool js_addstringroot(jscontext *cx,
jsstring **spp); jsbool js_addobjectroot(jscontext *cx, jsobject **opp); jsbool js_addgcthingroot(jscontext *cx, void **rp); jsbool js_addnamedvalueroot(jscontext *cx, jsval *vp, const char *name); jsbool js_addnamedstringroot(jscontext *cx,
jsstring **spp, const char *name); jsbool js_addnamedobjectroot(jscontext *cx, jsobject **opp, const char *name); jsbool js_addnamedgcthingroot(jscontext *cx, void **r...
... vp jsval * (in js_addvalueroot and js_addnamedvalueroot) the address of the jsval variable to root spp
jsstring ** (in js_addstringroot and js_addnamedstringroot) the address of the jsstring* variable to root opp jsobject ** (in js_addobjectroot and js_addnamedobjectroot) the address of the jsobject* variable to root rp void ** (in js_addgcthingroot and js_addnamedgcthingroot) the address of the jsstring* or jsobject* (not jsval) variable to root name const char * (in js_addnamedroot and js_addnamedroo...
... vp/spp/opp/rp is the address of a c/c++ variable (or field, or array element) of type
jsstring *, jsobject *, or jsval.
JS_CompareStrings
syntax bool js_comparestrings(jscontext *cx,
jsstring *str1,
jsstring *str2, int32_t *result); name type description cx jscontext * the context to which both strings must belong.
... str1
jsstring * first string to compare.
... str2
jsstring * second string to compare.
STRING_TO_JSVAL
syntax jsval string_to_jsval(
jsstring *str) name type description obj
jsstring * a pointer to a js string to convert to a jsval.
... description string_to_jsval casts a given
jsstring * to jsval.
... str must be a non-null pointer of type
jsstring *.
JSAPI User Guide
*/ char *filename; unsigned int lineno; /* * the return value comes back here -- if it could be a gc thing, you must * add it to the gc's "root set" with js_add*root(cx, &thing) where thing * is a
jsstring *, jsobject *, or jsdouble *, and remove the root before * rval goes out of scope, or when rval is no longer needed.
...able-trace-jscalls, you can use js_setfunctioncallback() to set up a c function to be called whenever a javascript function is about to be called, or has finished executing: void functransition(const jsfunction *func, const jsscript *scr, const jscontext *const_cx, jsbool entering) { jscontext *cx = const_cast<jscontext*>(const_cx);
jsstring *name = js_getfunctionid((jsfunction*)func); const char *entexit; const char *namestr; /* build a c string for the function's name */ if (!name) { namestr = "unnamed function"; } else { namestr = js_encodestring(cx, name); } /* build a string for whether we're entering or exiting */ if (entering) { entexit = "entering"; } else { entexit = "exiting"; } /* o...
JS::Remove*Root
syntax void removevalueroot(jscontext *cx, js::heap<js::value> *vp); void removestringroot(jscontext *cx, js::heap<
jsstring *> *rp); void removeobjectroot(jscontext *cx, js::heap<jsobject *> *rp); void removescriptroot(jscontext *cx, js::heap<jsscript *> *rp); void removevaluerootrt(jsruntime *rt, js::heap<js::value> *vp); void removestringrootrt(jsruntime *rt, js::heap<
jsstring *> *rp); void removeobjectrootrt(jsruntime *rt, js::heap<jsobject *> *rp); void removescriptrootrt(jsruntime *rt, js::heap<jsscript *> *r...
... rp js::heap<
jsstring *> address of the
jsstring * variable to remove from the root set.
JS_AddExternalStringFinalizer
callback syntax typedef void (*jsstringfinalizeop)(jscontext *cx,
jsstring *str); name type description cx jscontext * pointer to a jscontext which the finalizer may use for certain very limited operations (not documented).
...(is cx guaranteed to be non-null?) str
jsstring * the string being finalized.
JS_EncodeString
syntax char * js_encodestring(jscontext *cx,
jsstring *str); char * js_encodestringtoutf8(jscontext *cx, js::handlestring str); // added in spidermonkey 24 name type description cx jscontext * a context.
... str
jsstring * / js::handlestring a string to encode.
JS_EncodeStringToBuffer
syntax size_t js_encodestringtobuffer(jscontext *cx,
jsstring *str, char *buffer, size_t length); name type description cx jscontext * a context.
... str
jsstring * a string to encode.
JS_FileEscapedString
syntax bool js_fileescapedstring(file *fp,
jsstring *str, char quote); name type description fp file * a file pointer to write into.
... str
jsstring * a string to write into the file.
JS_FlattenString
syntax jsflatstring * js_flattenstring(jscontext *cx,
jsstring *str); name type description cx jscontext * the context.
... str
jsstring * the string to flatten.
JS_GetExternalStringClosure
syntax void * js_getexternalstringclosure(jscontext *cx,
jsstring *str); name type description cx jscontext * the context from which to retrieve the closure for a string.
... str
jsstring * the string for which to return the closure.
JS_GetLatin1InternedStringChars
syntax const js::latin1char * js_getlatin1internedstringchars(const js::autocheckcannotgc &nogc,
jsstring *str); const char16_t * js_gettwobyteinternedstringchars(const js::autocheckcannotgc &nogc,
jsstring *str); name type description cx jscontext * a context.
... str
jsstring * a string to get characters.
JS_GetLatin1StringCharsAndLength
syntax const js::latin1char * js_getlatin1stringcharsandlength(jscontext *cx, const js::autocheckcannotgc &nogc,
jsstring *str, size_t *length); const char16_t * js_gettwobytestringcharsandlength(jscontext *cx, const js::autocheckcannotgc &nogc,
jsstring *str, size_t *length); name type description cx jscontext * a context.
... str
jsstring * a string to get characters.
JS_GetStringBytes
syntax char * js_getstringbytes(
jsstring *str); const char * js_getstringbytesz(jscontext *cx,
jsstring *str); // added in jsapi 1.8.2 name type description cx jscontext * (js_getstringbytesz and js_encodestring only) a context.
... str
jsstring * string to retrieve bytes from.
JS_GetStringCharAt
syntax bool js_getstringcharat(jscontext *cx,
jsstring *str, size_t index, char16_t *res); char16_t js_getflatstringcharat(jsflatstring *str, size_t index); name type description cx jscontext * the context in which to create the new string.
... str
jsstring * or jsflatstring * the string to get character.
JS_GetStringChars
syntax jschar * js_getstringchars(
jsstring *str); // obsolete since jsapi 1.8.5 const jschar * js_getstringcharsz(jscontext *cx,
jsstring *str); // added in spidermonkey 1.8.2, obsolete since jsapi 33 name type description cx jscontext * (in js_getstringcharsz only) a context.
... str
jsstring * the string to obtain characters from.
JS_GetStringCharsAndLength
syntax const jschar * js_getstringcharsandlength(jscontext *cx,
jsstring *str, size_t *length); name type description cx jscontext * the context.
... str
jsstring * a string to get characters.
JS_GetStringEncodingLength
syntax size_t js_getstringencodinglength(jscontext *cx,
jsstring *str); name type description cx jscontext * a context.
... str
jsstring * a string to encode.
JS_InternJSString
syntax
jsstring * js_internjsstring(jscontext *cx, js::handlestring str); name type description cx jscontext * the context.
... description js_internjsstring converts a string str to interned string (interned atom) and returns the result string as
jsstring *.
JS_MakeStringImmutable
syntax jsbool js_makestringimmutable(jscontext *cx,
jsstring *str); name type description cx jscontext * a context.
... s
jsstring * the string to operate on.
JS_PutEscapedString
syntax size_t js_putescapedstring(jscontext *cx, char *buffer, size_t size,
jsstring *str, char quote); size_t js_putescapedflatstring(char *buffer, size_t size, jsflatstring *str, char quote); name type description cx jscontext * a context.
... str
jsstring * or jsflatstring * a string to write into the file.
JS_Remove*Root
syntax jsbool js_removevalueroot(jscontext *cx, jsval *vp); jsbool js_removestringroot(jscontext *cx,
jsstring **spp); jsbool js_removeobjectroot(jscontext *cx, jsobject **opp); jsbool js_removegcthingroot(jscontext *cx, void **rp); name type description cx jscontext * a context.
... spp
jsstring * address of the jsstring* variable to remove from the root set.
Mozilla DOM Hacking Guide
the second step is to map .location to .location.href in nswindowsh::setproperty() if (str == slocation_id) { // setting the location property
jsstring *val = ::js_valuetostring(cx, *vp); ns_ensure_true(val, ns_error_unexpected); // convert the value assigned to location (i.e.
Exact Stack Rooting
gcpointer - a raw pointer type or tagged pointer type that may refer to a gcthing (jsobject *,
jsstring *, value, jsid, etc.) gcheap - the graph of gcthings allocated by spidermonkey's allocator.
JSAPI Cookbook
jsapi code can override this by creating the error object directly and passing additional arguments to the constructor: // javascript throw new error(message, filename, lineno); /* jsapi */ bool throwerror(jscontext *cx, jsobject *global, const char *message, const char *filename, int32 lineno) {
jsstring *messagestr;
jsstring *filenamestr; js::value args[3]; js::value exc; messagestr = js_newstringcopyz(cx, message); if (!messagestr) return false; filenamestr = js_newstringcopyz(cx, filename); if (!filenamestr) return false; args[0] = string_to_jsval(messagestr); args[1] = string_to_jsval(filenamestr); args[2] = int_to_jsval(lineno); if ...
JS::Value
l) number val.isint32(), val.isdouble(), val.isnumber() js::numbervalue(any number type), js::int32value(int32_t), js::doublevalue(double), js::float32value(float) val.toint32(), val.todouble(), val.tonumber() val.setint32(int32_t), val.setnumber(uint32_t), val.setnumber(double) string val.isstring() js::stringvalue(jsstring*) val.tostring() val.setstring(
jsstring *) object val.isobject() js::objectvalue(jsobject&), js::objectornullvalue(jsobject*) val.toobject() val.setobject(jsobject &) symbol val.issymbol() js::symbolvalue(js::symbol*) val.tosymbol() val.setsymbol(js::symbol &) numbers are stored in a js::value either as a double or as an int32_t.
JS_ASSERT_STRING_IS_FLAT
syntax static moz_always_inline jsflatstring * js_assert_string_is_flat(
jsstring *str) { moz_assert(js_stringisflat(str)); return (jsflatstring *)str; } name type description str
jsstring * string to examine.
JS_ConcatStrings
syntax
jsstring * js_concatstrings(jscontext *cx, js::handlestring left, js::handlestring right); name type description cx jscontext * the context in which both the strings have been created.
JS_ConvertArguments
ool boolean c uint16_t ecma uint16_t, unicode character i int32_t ecma int32_t j int32_t ecma int32_t (used to be different, behaves like i now) obsolete since jsapi 28 u uint32_t ecma uint32_t d double ieee double i double integral ieee double s char * (c string) bug 607292 s
jsstring * unicode string, accessed by a jsstring pointer w char16_t * unicode character vector, 0-terminated (w for wide) o jsobject * object reference f jsfunction * the argument is converted to a function as though by a call to js_valuetofunction.
JS_DecompileFunction
syntax
jsstring * js_decompilefunction(jscontext *cx, js::handle<jsfunction*> fun); name type description cx jscontext * pointer to a js context from which to derive runtime information.
JS_DecompileFunctionBody
syntax
jsstring * js_decompilefunctionbody(jscontext *cx, js::handle<jsfunction*> fun, unsigned indent); name type description cx jscontext * the context in which to decompile the function.
JS_DecompileScript
syntax
jsstring * js_decompilescript(jscontext *cx, js::handle<jsscript*> script); name type description cx jscontext * the context to use to decompile the script.
JS_DecompileScriptObject
syntax
jsstring * js_decompilescriptobject(jscontext *cx, jsobject *scriptobj, const char *name, unsigned int indent); name type description cx jscontext * the context.
JS_DumpNamedRoots
it points to a variable, array element, or field of type jsval, jsobject *,
jsstring *, or jsdouble *.
JS_FORGET_STRING_FLATNESS
syntax static moz_always_inline
jsstring * js_forget_string_flatness(jsflatstring *fstr) { return (
jsstring *)fstr; } name type description fstr jsflatstring * a string to convert description js_forget_string_flatness converts jsflatstring * to
jsstring *.
JS_GetEmptyString
syntax
jsstring * js_getemptystring(jsruntime *rt); name type description rt jsruntime * the runtime for which to return the empty string.
JS_GetExternalStringFinalizer
syntax const jsstringfinalizer * js_getexternalstringfinalizer(
jsstring *str); name type description str
jsstring * a string to get finalizer.
JS_GetFunctionId
syntax
jsstring * js_getfunctionid(jsfunction *fun);
jsstring * js_getfunctiondisplayid(jsfunction *fun); // added in spidermonkey 17 name type description fun jsfunction * a javascript function.
JS_GetInternedStringChars
syntax const jschar * js_getinternedstringchars(
jsstring *str); const jschar * js_getinternedstringcharsandlength(
jsstring *str, size_t *length); name type description str
jsstring * the interned string.
JS_GetRegExpSource
syntax
jsstring * js_getregexpsource(jscontext *cx, js::handleobject obj); name type description cx jscontext * a context.
JS_GetStringLength
syntax size_t js_getstringlength(
jsstring *str); name type description str
jsstring * the string to examine.
JS_GetTwoByteExternalStringChars
syntax const char16_t * js_gettwobyteexternalstringchars(
jsstring *str); name type description str
jsstring * a string to get characters.
JS_InternString
syntax
jsstring * js_internstring(jscontext *cx, const char *s);
jsstring * js_internstringn(jscontext *cx, const char *s, size_t length);
jsstring * js_internucstring(jscontext *cx, const char16_t *s);
jsstring * js_internucstringn(jscontext *cx, const char16_t *s, size_t length); name type description cx jscontext * a context.
JS_IsExternalString
syntax bool js_isexternalstring(
jsstring *str); name type description str
jsstring * the string to check.
JS_NewDependentString
syntax
jsstring * js_newdependentstring(jscontext *cx, js::handlestring str, size_t start, size_t length); name type description cx jscontext * the context in which to create the new string.
JS_NewExternalString
syntax
jsstring * js_newexternalstring(jscontext *cx, const char16_t *chars, size_t length, const jsstringfinalizer *fin);
jsstring * js_newexternalstringwithclosure(jscontext *cx, jschar *chars, size_t length, int type, void *closure); // obsolete since jsapi 13 name type description cx jscontext * the context in which to create the new string.
JS_NewUCString
syntax
jsstring * js_newucstring(jscontext *cx, char16_t *chars, size_t length);
jsstring * js_newstring(jscontext *cx, char *buf, size_t length); // obsolete since jsapi 1.8.5 name type description cx jscontext * the context in which to create the new string.
JS_NewStringCopyN
syntax
jsstring * js_newstringcopyn(jscontext *cx, const char *s, size_t n);
jsstring * js_newucstringcopyn(jscontext *cx, const char16_t *s, size_t n); name type description cx jscontext * pointer to a js context from which to derive runtime information.
JS_NewStringCopyZ
syntax
jsstring * js_newstringcopyz(jscontext *cx, const char *s);
jsstring * js_newucstringcopyz(jscontext *cx, const char16_t *s); name type description cx jscontext * pointer to a js context from which to derive runtime information.
JS_PushArguments
: character argument type b jsbool c uint16 (16-bit, unsigned integer) i int32 (32-bit, ecma-compliant signed integer) u uint32 (32-bit, ecma-compliant, unsigned integer) j int32 (32-bit, signed integer) d jsdouble i jsdouble (converted to an integer value) s char * (c string) s
jsstring * (unicode string) w jschar * (unicode null-terminated string) o jsobject * f jsfunction * * none.
JS_StringEqualsAscii
syntax bool js_stringequalsascii(jscontext *cx,
jsstring *str, const char *asciibytes, bool *match); bool js_flatstringequalsascii(jsflatstring *str, const char *asciibytes); name type description cx jscontext * a context.
JS_StringHasBeenInterned
syntax bool js_stringhasbeeninterned(jscontext *cx,
jsstring *str); name type description str
jsstring * a string to examine.
JS_StringHasLatin1Chars
syntax bool js_stringhaslatin1chars(
jsstring *str); name type description str
jsstring * string to examine.