This article needs a technical review. How you can help.

This article covers features introduced in SpiderMonkey 1.8.5

Convert a JavaScript string to a C string.


JS_EncodeStringToBuffer(JSContext *cx, JSString *str, char *buffer, size_t length);
Name Type Description
cx JSContext * A context. Requires request. In a JS_THREADSAFE build, the caller must be in a request on this JSContext.
str JSString * A string to encode.
buffer char * A character buffer to receive encoded string.
length size_t The size of buffer in bytes.


JS_EncodeStringToBuffer converts the specified JavaScript str to a C string (an array of 8-bit chars) and fills the specified buffer with up to length bytes of the string in UTF-8 format. It returns the length of the whole string encoding or (size_t)-1 if the string can't be encoded as bytes. If the returned value is greater than the length you specified, the string was truncated.

See Also

Document Tags and Contributors

 Contributors to this page: kscarfone, arai
 Last updated by: kscarfone,