JSBase.h revision 65f03d4f644ce73618e5f4f50dd694b26f55ae12 
1/*
2 * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#ifndef JSBase_h
27#define JSBase_h
28
29#ifndef __cplusplus
30#include <stdbool.h>
31#endif
32
33/* JavaScript engine interface */
34
35/*! @typedef JSContextGroupRef A group that associates JavaScript contexts with one another. Contexts in the same group may share and exchange JavaScript objects. */
36typedef const struct OpaqueJSContextGroup* JSContextGroupRef;
37
38/*! @typedef JSContextRef A JavaScript execution context. Holds the global object and other execution state. */
39typedef const struct OpaqueJSContext* JSContextRef;
40
41/*! @typedef JSGlobalContextRef A global JavaScript execution context. A JSGlobalContext is a JSContext. */
42typedef struct OpaqueJSContext* JSGlobalContextRef;
43
44/*! @typedef JSStringRef A UTF16 character buffer. The fundamental string representation in JavaScript. */
45typedef struct OpaqueJSString* JSStringRef;
46
47/*! @typedef JSClassRef A JavaScript class. Used with JSObjectMake to construct objects with custom behavior. */
48typedef struct OpaqueJSClass* JSClassRef;
49
50/*! @typedef JSPropertyNameArrayRef An array of JavaScript property names. */
51typedef struct OpaqueJSPropertyNameArray* JSPropertyNameArrayRef;
52
53/*! @typedef JSPropertyNameAccumulatorRef An ordered set used to collect the names of a JavaScript object's properties. */
54typedef struct OpaqueJSPropertyNameAccumulator* JSPropertyNameAccumulatorRef;
55
56
57/* JavaScript data types */
58
59/*! @typedef JSValueRef A JavaScript value. The base type for all JavaScript values, and polymorphic functions on them. */
60typedef const struct OpaqueJSValue* JSValueRef;
61
62/*! @typedef JSObjectRef A JavaScript object. A JSObject is a JSValue. */
63typedef struct OpaqueJSValue* JSObjectRef;
64
65/* JavaScript symbol exports */
66/* These rules should stay the same as in WebKit2/Shared/API/c/WKBase.h */
67
68#undef JS_EXPORT
69#if defined(JS_NO_EXPORT)
70#define JS_EXPORT
71#elif defined(__GNUC__) && !defined(__CC_ARM) && !defined(__ARMCC__)
72#define JS_EXPORT __attribute__((visibility("default")))
73#elif defined(WIN32) || defined(_WIN32) || defined(_WIN32_WCE) || defined(__CC_ARM) || defined(__ARMCC__)
74#if defined(BUILDING_JavaScriptCore) || defined(BUILDING_WTF)
75#define JS_EXPORT __declspec(dllexport)
76#else
77#define JS_EXPORT __declspec(dllimport)
78#endif
79#else /* !defined(JS_NO_EXPORT) */
80#define JS_EXPORT
81#endif /* defined(JS_NO_EXPORT) */
82
83#ifdef __cplusplus
84extern "C" {
85#endif
86
87/* Script Evaluation */
88
89/*!
90@function JSEvaluateScript
91@abstract Evaluates a string of JavaScript.
92@param ctx The execution context to use.
93@param script A JSString containing the script to evaluate.
94@param thisObject The object to use as "this," or NULL to use the global object as "this."
95@param sourceURL A JSString containing a URL for the script's source file. This is only used when reporting exceptions. Pass NULL if you do not care to include source file information in exceptions.
96@param startingLineNumber An integer value specifying the script's starting line number in the file located at sourceURL. This is only used when reporting exceptions.
97@param exception A pointer to a JSValueRef in which to store an exception, if any. Pass NULL if you do not care to store an exception.
98@result The JSValue that results from evaluating script, or NULL if an exception is thrown.
99*/
100JS_EXPORT JSValueRef JSEvaluateScript(JSContextRef ctx, JSStringRef script, JSObjectRef thisObject, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception);
101
102/*!
103@function JSCheckScriptSyntax
104@abstract Checks for syntax errors in a string of JavaScript.
105@param ctx The execution context to use.
106@param script A JSString containing the script to check for syntax errors.
107@param sourceURL A JSString containing a URL for the script's source file. This is only used when reporting exceptions. Pass NULL if you do not care to include source file information in exceptions.
108@param startingLineNumber An integer value specifying the script's starting line number in the file located at sourceURL. This is only used when reporting exceptions.
109@param exception A pointer to a JSValueRef in which to store a syntax error exception, if any. Pass NULL if you do not care to store a syntax error exception.
110@result true if the script is syntactically correct, otherwise false.
111*/
112JS_EXPORT bool JSCheckScriptSyntax(JSContextRef ctx, JSStringRef script, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception);
113
114/*!
115@function JSGarbageCollect
116@abstract Performs a JavaScript garbage collection.
117@param ctx The execution context to use.
118@discussion JavaScript values that are on the machine stack, in a register,
119 protected by JSValueProtect, set as the global object of an execution context,
120 or reachable from any such value will not be collected.
121
122 During JavaScript execution, you are not required to call this function; the
123 JavaScript engine will garbage collect as needed. JavaScript values created
124 within a context group are automatically destroyed when the last reference
125 to the context group is released.
126*/
127JS_EXPORT void JSGarbageCollect(JSContextRef ctx);
128
129#ifdef __cplusplus
130}
131#endif
132
133#endif /* JSBase_h */
134