DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.

Implementation

Untracked file

Line Code
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 *
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code, released
 * March 31, 1998.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef jsxdrapi_h___
#define jsxdrapi_h___

/*
 * JS external data representation interface API.
 *
 * The XDR system is comprised of three major parts:
 *
 * - the state serialization/deserialization APIs, which allow consumers
 *   of the API to serialize JS runtime state (script bytecodes, atom maps,
 *   object graphs, etc.) for later restoration.  These portions
 *   are implemented in various appropriate files, such as jsscript.c
 *   for the script portions and jsobj.c for object state.
 * - the callback APIs through which the runtime requests an opaque
 *   representation of a native object, and through which the runtime
 *   constructs a live native object from an opaque representation. These
 *   portions are the responsibility of the native object implementor.
 * - utility functions for en/decoding of primitive types, such as
 *   JSStrings.  This portion is implemented in jsxdrapi.c.
 *
 * Spiritually guided by Sun's XDR, where appropriate.
 */

#include "jspubtd.h"
#include "jsprvtd.h"

JS_BEGIN_EXTERN_C

/* We use little-endian byteorder for all encoded data */

#if defined IS_LITTLE_ENDIAN
#define JSXDR_SWAB32(x) x
#define JSXDR_SWAB16(x) x
#elif defined IS_BIG_ENDIAN
#define JSXDR_SWAB32(x) (((uint32)(x) >> 24) |                                \
                         (((uint32)(x) >> 8) & 0xff00) |                      \
                         (((uint32)(x) << 8) & 0xff0000) |                    \
                         ((uint32)(x) << 24))
#define JSXDR_SWAB16(x) (((uint16)(x) >> 8) | ((uint16)(x) << 8))
#else
#error "unknown byte order"
#endif

#define JSXDR_ALIGN     4

typedef enum JSXDRMode {
    JSXDR_ENCODE,
    JSXDR_DECODE,
    JSXDR_FREE
} JSXDRMode;

typedef enum JSXDRWhence {
    JSXDR_SEEK_SET,
    JSXDR_SEEK_CUR,
    JSXDR_SEEK_END
} JSXDRWhence;

typedef struct JSXDROps {
    JSBool      (*get32)(JSXDRState *, uint32 *);
    JSBool      (*set32)(JSXDRState *, uint32 *);
    JSBool      (*getbytes)(JSXDRState *, char *, uint32);
    JSBool      (*setbytes)(JSXDRState *, char *, uint32);
    void *      (*raw)(JSXDRState *, uint32);
    JSBool      (*seek)(JSXDRState *, int32, JSXDRWhence);
    uint32      (*tell)(JSXDRState *);
    void        (*finalize)(JSXDRState *);
} JSXDROps;

struct JSXDRState {
    JSXDRMode   mode;
    JSXDROps    *ops;
    JSContext   *cx;
    JSClass     **registry;
    uintN       numclasses;
    uintN       maxclasses;
    void        *reghash;
    void        *userdata;
};

extern JS_PUBLIC_API(void)
JS_XDRInitBase(JSXDRState *xdr, JSXDRMode mode, JSContext *cx);

extern JS_PUBLIC_API(JSXDRState *)
JS_XDRNewMem(JSContext *cx, JSXDRMode mode);

extern JS_PUBLIC_API(void *)
JS_XDRMemGetData(JSXDRState *xdr, uint32 *lp);

extern JS_PUBLIC_API(void)
JS_XDRMemSetData(JSXDRState *xdr, void *data, uint32 len);

extern JS_PUBLIC_API(uint32)
JS_XDRMemDataLeft(JSXDRState *xdr);

extern JS_PUBLIC_API(void)
JS_XDRMemResetData(JSXDRState *xdr);

extern JS_PUBLIC_API(void)
JS_XDRDestroy(JSXDRState *xdr);

extern JS_PUBLIC_API(JSBool)
JS_XDRUint8(JSXDRState *xdr, uint8 *b);

extern JS_PUBLIC_API(JSBool)
JS_XDRUint16(JSXDRState *xdr, uint16 *s);

extern JS_PUBLIC_API(JSBool)
JS_XDRUint32(JSXDRState *xdr, uint32 *lp);

extern JS_PUBLIC_API(JSBool)
JS_XDRBytes(JSXDRState *xdr, char *bytes, uint32 len);

extern JS_PUBLIC_API(JSBool)
JS_XDRCString(JSXDRState *xdr, char **sp);

extern JS_PUBLIC_API(JSBool)
JS_XDRCStringOrNull(JSXDRState *xdr, char **sp);

extern JS_PUBLIC_API(JSBool)
JS_XDRString(JSXDRState *xdr, JSString **strp);

extern JS_PUBLIC_API(JSBool)
JS_XDRStringOrNull(JSXDRState *xdr, JSString **strp);

extern JS_PUBLIC_API(JSBool)
JS_XDRDouble(JSXDRState *xdr, jsdouble **dp);

extern JS_PUBLIC_API(JSBool)
JS_XDRValue(JSXDRState *xdr, jsval *vp);

extern JS_PUBLIC_API(JSBool)
JS_XDRScript(JSXDRState *xdr, JSScript **scriptp);

extern JS_PUBLIC_API(JSBool)
JS_XDRRegisterClass(JSXDRState *xdr, JSClass *clasp, uint32 *lp);

extern JS_PUBLIC_API(uint32)
JS_XDRFindClassIdByName(JSXDRState *xdr, const char *name);

extern JS_PUBLIC_API(JSClass *)
JS_XDRFindClassById(JSXDRState *xdr, uint32 id);

/*
 * Magic numbers.
 */
#define JSXDR_MAGIC_SCRIPT_1        0xdead0001
#define JSXDR_MAGIC_SCRIPT_2        0xdead0002
#define JSXDR_MAGIC_SCRIPT_3        0xdead0003
#define JSXDR_MAGIC_SCRIPT_4        0xdead0004
#define JSXDR_MAGIC_SCRIPT_CURRENT  JSXDR_MAGIC_SCRIPT_4

JS_END_EXTERN_C

#endif /* ! jsxdrapi_h___ */