Adobe Extending Dreamweaver CS4 Manuale Utente Scaricare il pdf (Pagina 357)

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EXTENDING DREAMWEAVER CS4

C-level extensibility

Arguments

JSContext *cx, JSVal v, unsigned integer *pLength

• The *cx argument is the opaque JSContext pointer that passes to the JavaScript function.

• The v argument is the JSVal structure from which Dreamweaver extracts the string.

• The *pLength argument is a pointer to an unsigned integer. This function sets *pLength equal to the length of the

string in bytes.

Returns

A pointer that points to a null-terminated string if successful, or to a null value on failure. The calling routine must

not free this string when it finishes.

JSBool JS_ValueToInteger()

Description

This function extracts a function argument from a JSVal structure, converts it to an integer (if possible), and passes

the converted value back to the caller.

Arguments

JSContext *cx, JSVal v, long *lp

• The cx argument is the opaque JSContext pointer that passes to the JavaScript function.

• The v argument is the JSVal structure from which the integer is to be extracted.

• The lp argument is a pointer to a 4-byte integer. This function stores the converted value in *lp.

Returns

A Boolean value: JS_TRUE indicates success; JS_FALSE indicates failure.

JSBool JS_ValueToDouble()

Description

This function extracts a function argument from a JSVal structure, converts it to a double (if possible), and passes the

converted value back to the caller.

Arguments

JSContext *cx, JSVal v, double *dp

• The cx argument is the opaque JSContext pointer that passes to the JavaScript function.

• The v argument is the JSVal structure from which the double is to be extracted.

• The dp argument is a pointer to an 8-byte double. This function stores the converted value in *dp.

Returns

A Boolean value: JS_TRUE indicates success; JS_FALSE indicates failure.

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Adobe Extending Dreamweaver CS4 Manuale Utente Pagina 357