mirror of
https://github.com/classilla/tenfourfox.git
synced 2024-09-09 04:54:33 +00:00
184 lines
5.8 KiB
C
184 lines
5.8 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/*
|
|
* Basic APIs for streaming typelib structures to/from disk.
|
|
*/
|
|
|
|
#ifndef __xpt_xdr_h__
|
|
#define __xpt_xdr_h__
|
|
|
|
#include "xpt_struct.h"
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
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, int64_t *u64p);
|
|
|
|
extern XPT_PUBLIC_API(PRBool)
|
|
XPT_Do32(XPTCursor *cursor, uint32_t *u32p);
|
|
|
|
extern XPT_PUBLIC_API(PRBool)
|
|
XPT_Do16(XPTCursor *cursor, uint16_t *u16p);
|
|
|
|
extern XPT_PUBLIC_API(PRBool)
|
|
XPT_Do8(XPTCursor *cursor, uint8_t *u8p);
|
|
|
|
extern XPT_PUBLIC_API(PRBool)
|
|
XPT_DoHeaderPrologue(XPTArena *arena, XPTCursor *cursor, XPTHeader **headerp, uint32_t * 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;
|
|
uint32_t data_offset;
|
|
uint32_t next_cursor[2];
|
|
XPTDatapool *pool;
|
|
XPTArena *arena;
|
|
};
|
|
|
|
struct XPTDatapool {
|
|
XPTHashTable *offset_map;
|
|
char *data;
|
|
uint32_t count;
|
|
uint32_t allocated;
|
|
};
|
|
|
|
struct XPTCursor {
|
|
XPTState *state;
|
|
XPTPool pool;
|
|
uint32_t offset;
|
|
uint8_t bits;
|
|
};
|
|
|
|
extern XPT_PUBLIC_API(XPTState *)
|
|
XPT_NewXDRState(XPTMode mode, char *data, uint32_t len);
|
|
|
|
extern XPT_PUBLIC_API(PRBool)
|
|
XPT_MakeCursor(XPTState *state, XPTPool pool, uint32_t len, XPTCursor *cursor);
|
|
|
|
extern XPT_PUBLIC_API(PRBool)
|
|
XPT_SeekTo(XPTCursor *cursor, uint32_t 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, uint32_t *len);
|
|
|
|
extern XPT_PUBLIC_API(void)
|
|
XPT_GetXDRData(XPTState *state, XPTPool pool, char **data, uint32_t *len);
|
|
|
|
/* set or get the data offset for the state, depending on mode */
|
|
extern XPT_PUBLIC_API(void)
|
|
XPT_DataOffset(XPTState *state, uint32_t *data_offsetp);
|
|
|
|
extern XPT_PUBLIC_API(void)
|
|
XPT_SetDataOffset(XPTState *state, uint32_t data_offset);
|
|
|
|
extern XPT_PUBLIC_API(uint32_t)
|
|
XPT_GetOffsetForAddr(XPTCursor *cursor, void *addr);
|
|
|
|
extern XPT_PUBLIC_API(PRBool)
|
|
XPT_SetOffsetForAddr(XPTCursor *cursor, void *addr, uint32_t offset);
|
|
|
|
extern XPT_PUBLIC_API(PRBool)
|
|
XPT_SetAddrForOffset(XPTCursor *cursor, uint32_t offset, void *addr);
|
|
|
|
extern XPT_PUBLIC_API(void *)
|
|
XPT_GetAddrForOffset(XPTCursor *cursor, uint32_t 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;
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __xpt_xdr_h__ */
|