Macromedia dreamweaver 8-extending dreamweaver Manuel D’Utilisation
The C-level API
469
JSBool JS_ExecuteScript()
Description
This function compiles and executes a JavaScript string. If the script generates a return value,
it returns in
it returns in
*rval
.
Arguments
JSContext *cx
,
JSObject *obj
,
char *script
,
unsigned int sz
,
jsval *rval
■
The
cx
argument is the opaque
JSContext
pointer that passes to the JavaScript function.
■
The
obj
argument is a pointer to the object in whose context the script executes. While
the script is running, the
this
keyword is equal to this object. Usually this is the
JSObject
pointer that passes to the JavaScript function.
■
The
script
argument is a string that contains JavaScript code. If the string size is not
specified (see the
sz
argument), the string must be null-terminated.
■
The
sz
argument is the size of the string, in bytes. If sz is 0, the length of the null-
terminated string is computed automatically.
■
The
rval
argument is a pointer to a single
jsval
structure. The function’s return value is
stored in
*rval
.
Returns
A Boolean value:
JS_TRUE
indicates success;
JS_FALSE
indicates failure.
JSBool JS_ReportError()
Description
This function describes the reason for a script error. Call this function before returning the
value
value
JS_FALSE
for a script error to give the user information about why the script failed (for
example, “wrong number of arguments”).
Arguments
JSContext *cx
,
char *error
,
size_t sz
■
The
cx
argument is the opaque
JSContext
pointer that passes to the JavaScript function.
■
The
error
argument is a string that contains the error message. The string is copied, so
the caller should free the string when it is not needed. If the string size is not specified (see
the
the
sz
argument), the string must be null-terminated.
■
The
sz
argument is the size of the string, in bytes. If sz is 0, the length of the null-
terminated string is computed automatically.