| /* -*- 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.org code. |
| * |
| * 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 |
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| * |
| * ***** END LICENSE BLOCK ***** */ |
| |
| /* |
| * Basic APIs for streaming typelib structures to/from disk. |
| */ |
| |
| #ifndef __xpt_xdr_h__ |
| #define __xpt_xdr_h__ |
| |
| #include "xpt_struct.h" |
| |
| PR_BEGIN_EXTERN_C |
| |
| typedef struct XPTState XPTState; |
| typedef struct XPTDatapool XPTDatapool; |
| typedef struct XPTCursor XPTCursor; |
| |
| /* Opaque type, for internal use */ |
| typedef struct XPTHashTable XPTHashTable; |
| |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_DoString(XPTArena *arena, XPTCursor *cursor, XPTString **strp); |
| |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_DoStringInline(XPTArena *arena, XPTCursor *cursor, XPTString **strp); |
| |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_DoCString(XPTArena *arena, XPTCursor *cursor, char **strp); |
| |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_DoIID(XPTCursor *cursor, nsID *iidp); |
| |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_Do64(XPTCursor *cursor, PRInt64 *u64p); |
| |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_Do32(XPTCursor *cursor, PRUint32 *u32p); |
| |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_Do16(XPTCursor *cursor, PRUint16 *u16p); |
| |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_Do8(XPTCursor *cursor, PRUint8 *u8p); |
| |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_DoHeaderPrologue(XPTArena *arena, XPTCursor *cursor, XPTHeader **headerp, PRUint32 * ide_offset); |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_DoHeader(XPTArena *arena, XPTCursor *cursor, XPTHeader **headerp); |
| |
| typedef enum { |
| XPT_ENCODE, |
| XPT_DECODE |
| } XPTMode; |
| |
| typedef enum { |
| XPT_HEADER = 0, |
| XPT_DATA = 1 |
| } XPTPool; |
| |
| struct XPTState { |
| XPTMode mode; |
| PRUint32 data_offset; |
| PRUint32 next_cursor[2]; |
| XPTDatapool *pool; |
| XPTArena *arena; |
| }; |
| |
| struct XPTDatapool { |
| XPTHashTable *offset_map; |
| char *data; |
| PRUint32 count; |
| PRUint32 allocated; |
| }; |
| |
| struct XPTCursor { |
| XPTState *state; |
| XPTPool pool; |
| PRUint32 offset; |
| PRUint8 bits; |
| }; |
| |
| extern XPT_PUBLIC_API(XPTState *) |
| XPT_NewXDRState(XPTMode mode, char *data, PRUint32 len); |
| |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_MakeCursor(XPTState *state, XPTPool pool, PRUint32 len, XPTCursor *cursor); |
| |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_SeekTo(XPTCursor *cursor, PRUint32 offset); |
| |
| extern XPT_PUBLIC_API(void) |
| XPT_DestroyXDRState(XPTState *state); |
| |
| /* Set file_length based on the data used in the state. (Only ENCODE.) */ |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_UpdateFileLength(XPTState *state); |
| |
| /* returns the length of the specified data block */ |
| extern XPT_PUBLIC_API(void) |
| XPT_GetXDRDataLength(XPTState *state, XPTPool pool, PRUint32 *len); |
| |
| extern XPT_PUBLIC_API(void) |
| XPT_GetXDRData(XPTState *state, XPTPool pool, char **data, PRUint32 *len); |
| |
| /* set or get the data offset for the state, depending on mode */ |
| extern XPT_PUBLIC_API(void) |
| XPT_DataOffset(XPTState *state, PRUint32 *data_offsetp); |
| |
| extern XPT_PUBLIC_API(void) |
| XPT_SetDataOffset(XPTState *state, PRUint32 data_offset); |
| |
| extern XPT_PUBLIC_API(PRUint32) |
| XPT_GetOffsetForAddr(XPTCursor *cursor, void *addr); |
| |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_SetOffsetForAddr(XPTCursor *cursor, void *addr, PRUint32 offset); |
| |
| extern XPT_PUBLIC_API(PRBool) |
| XPT_SetAddrForOffset(XPTCursor *cursor, PRUint32 offset, void *addr); |
| |
| extern XPT_PUBLIC_API(void *) |
| XPT_GetAddrForOffset(XPTCursor *cursor, PRUint32 offset); |
| |
| /* all data structures are big-endian */ |
| |
| #if defined IS_BIG_ENDIAN |
| # define XPT_SWAB32(x) x |
| # define XPT_SWAB16(x) x |
| #elif defined IS_LITTLE_ENDIAN |
| # define XPT_SWAB32(x) (((x) >> 24) | \ |
| (((x) >> 8) & 0xff00) | \ |
| (((x) << 8) & 0xff0000) | \ |
| ((x) << 24)) |
| # define XPT_SWAB16(x) (((x) >> 8) | ((x) << 8)) |
| #else |
| # error "unknown byte order" |
| #endif |
| |
| /* |
| * If we're decoding, we want to read the offset before we check |
| * for already-decoded values. |
| * |
| * Then we check for repetition: CheckForRepeat will see if we've already |
| * encoded/decoded this value, and if so will set offset/addr correctly |
| * and make already be true. If not, it will set up the cursor for |
| * encoding (reserve space) or decoding (seek to correct location) as |
| * appropriate. In the encode case, it will also set the addr->offset |
| * mapping. |
| */ |
| |
| #define XPT_PREAMBLE_(cursor, addrp, pool, size, new_curs, already) \ |
| XPTMode mode = cursor->state->mode; \ |
| if (!(mode == XPT_ENCODE || XPT_Do32(cursor, &new_curs.offset)) || \ |
| !CheckForRepeat(cursor, (void **)addrp, pool, \ |
| mode == XPT_ENCODE ? size : 0u, &new_curs, \ |
| &already) || \ |
| !(mode == XPT_DECODE || XPT_Do32(cursor, &new_curs.offset))) \ |
| return PR_FALSE; \ |
| if (already) \ |
| return PR_TRUE; \ |
| |
| #define XPT_PREAMBLE_NO_ALLOC(cursor, addrp, pool, size, new_curs, already) \ |
| { \ |
| XPT_PREAMBLE_(cursor, addrp, pool, size, new_curs, already) \ |
| } |
| |
| #define XPT_ERROR_HANDLE(arena, free_it) \ |
| error: \ |
| if (cursor->state->mode == XPT_DECODE) \ |
| XPT_FREEIF(arena, free_it); \ |
| return PR_FALSE; |
| |
| |
| PR_END_EXTERN_C |
| |
| #endif /* __xpt_xdr_h__ */ |