530 lines
19 KiB
C
530 lines
19 KiB
C
|
/**
|
||
|
|
* \file libyasm/file.h
|
||
|
|
* \brief YASM file helpers.
|
||
|
|
*
|
||
|
|
* \rcs
|
||
|
|
* $Id: file.h 2287 2010-02-13 08:42:27Z peter $
|
||
|
|
* \endrcs
|
||
|
|
*
|
||
|
|
* \license
|
||
|
|
* Copyright (C) 2001-2007 Peter Johnson
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* - Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* - Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND OTHER CONTRIBUTORS ``AS IS''
|
||
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR OTHER CONTRIBUTORS BE
|
||
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
||
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
||
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
||
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
||
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
||
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
||
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
* \endlicense
|
||
|
|
*/
|
||
|
|
#ifndef YASM_FILE_H
|
||
|
|
#define YASM_FILE_H
|
||
|
|
|
||
|
|
#ifndef YASM_LIB_DECL
|
||
|
|
#define YASM_LIB_DECL
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/** Re2c scanner state. */
|
||
|
|
typedef struct yasm_scanner {
|
||
|
|
unsigned char *bot; /**< Bottom of scan buffer */
|
||
|
|
unsigned char *tok; /**< Start of token */
|
||
|
|
unsigned char *ptr; /**< Scan marker */
|
||
|
|
unsigned char *cur; /**< Cursor (1 past end of token) */
|
||
|
|
unsigned char *lim; /**< Limit of good data */
|
||
|
|
unsigned char *top; /**< Top of scan buffer */
|
||
|
|
unsigned char *eof; /**< End of file */
|
||
|
|
} yasm_scanner;
|
||
|
|
|
||
|
|
/** Initialize scanner state.
|
||
|
|
* \param scanner Re2c scanner state
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
void yasm_scanner_initialize(yasm_scanner *scanner);
|
||
|
|
|
||
|
|
/** Frees any memory used by scanner state; does not free state itself.
|
||
|
|
* \param scanner Re2c scanner state
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
void yasm_scanner_delete(yasm_scanner *scanner);
|
||
|
|
|
||
|
|
/** Fill a scanner state structure with data coming from an input function.
|
||
|
|
* \param scanner Re2c scanner state
|
||
|
|
* \param cursor Re2c scan cursor
|
||
|
|
* \param input_func Input function to read data; takes buffer and maximum
|
||
|
|
* number of bytes, returns number of bytes read.
|
||
|
|
* \param input_func_data Data to pass as the first parameter to input_func
|
||
|
|
* \return 1 if this was the first time this function was called on this
|
||
|
|
* scanner state, 0 otherwise.
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
int yasm_fill_helper
|
||
|
|
(yasm_scanner *scanner, unsigned char **cursor,
|
||
|
|
size_t (*input_func) (void *d, unsigned char *buf, size_t max),
|
||
|
|
void *input_func_data);
|
||
|
|
|
||
|
|
/** Unescape a string with C-style escapes. Handles b, f, n, r, t, and hex
|
||
|
|
* and octal escapes. String is updated in-place.
|
||
|
|
* Edge cases:
|
||
|
|
* - hex escapes: reads as many hex digits as possible, takes last 2 as value.
|
||
|
|
* - oct escapes: takes up to 3 digits 0-9 and scales appropriately, with
|
||
|
|
* warning.
|
||
|
|
* \param str C-style string (updated in place)
|
||
|
|
* \param len length of string (updated with new length)
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
void yasm_unescape_cstring(unsigned char *str, size_t *len);
|
||
|
|
|
||
|
|
/** Split a UNIX pathname into head (directory) and tail (base filename)
|
||
|
|
* portions.
|
||
|
|
* \internal
|
||
|
|
* \param path pathname
|
||
|
|
* \param tail (returned) base filename
|
||
|
|
* \return Length of head (directory).
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
size_t yasm__splitpath_unix(const char *path, /*@out@*/ const char **tail);
|
||
|
|
|
||
|
|
/** Split a Windows pathname into head (directory) and tail (base filename)
|
||
|
|
* portions.
|
||
|
|
* \internal
|
||
|
|
* \param path pathname
|
||
|
|
* \param tail (returned) base filename
|
||
|
|
* \return Length of head (directory).
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
size_t yasm__splitpath_win(const char *path, /*@out@*/ const char **tail);
|
||
|
|
|
||
|
|
/** Split a pathname into head (directory) and tail (base filename) portions.
|
||
|
|
* Unless otherwise defined, defaults to yasm__splitpath_unix().
|
||
|
|
* \internal
|
||
|
|
* \param path pathname
|
||
|
|
* \param tail (returned) base filename
|
||
|
|
* \return Length of head (directory).
|
||
|
|
*/
|
||
|
|
#ifndef yasm__splitpath
|
||
|
|
# if defined (_WIN32) || defined (WIN32) || defined (__MSDOS__) || \
|
||
|
|
defined (__DJGPP__) || defined (__OS2__)
|
||
|
|
# define yasm__splitpath(path, tail) yasm__splitpath_win(path, tail)
|
||
|
|
# else
|
||
|
|
# define yasm__splitpath(path, tail) yasm__splitpath_unix(path, tail)
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/** Get the current working directory.
|
||
|
|
* \internal
|
||
|
|
* \return Current working directory pathname (newly allocated).
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
/*@only@*/ char *yasm__getcwd(void);
|
||
|
|
|
||
|
|
/** Convert a relative or absolute pathname into an absolute pathname.
|
||
|
|
* \internal
|
||
|
|
* \param path pathname
|
||
|
|
* \return Absolute version of path (newly allocated).
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
/*@only@*/ char *yasm__abspath(const char *path);
|
||
|
|
|
||
|
|
/** Build a UNIX pathname that is equivalent to accessing the "to" pathname
|
||
|
|
* when you're in the directory containing "from". Result is relative if both
|
||
|
|
* from and to are relative.
|
||
|
|
* \internal
|
||
|
|
* \param from from pathname
|
||
|
|
* \param to to pathname
|
||
|
|
* \return Combined path (newly allocated).
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
char *yasm__combpath_unix(const char *from, const char *to);
|
||
|
|
|
||
|
|
/** Build a Windows pathname that is equivalent to accessing the "to" pathname
|
||
|
|
* when you're in the directory containing "from". Result is relative if both
|
||
|
|
* from and to are relative.
|
||
|
|
* \internal
|
||
|
|
* \param from from pathname
|
||
|
|
* \param to to pathname
|
||
|
|
* \return Combined path (newly allocated).
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
char *yasm__combpath_win(const char *from, const char *to);
|
||
|
|
|
||
|
|
/** Build a pathname that is equivalent to accessing the "to" pathname
|
||
|
|
* when you're in the directory containing "from". Result is relative if both
|
||
|
|
* from and to are relative.
|
||
|
|
* Unless otherwise defined, defaults to yasm__combpath_unix().
|
||
|
|
* \internal
|
||
|
|
* \param from from pathname
|
||
|
|
* \param to to pathname
|
||
|
|
* \return Combined path (newly allocated).
|
||
|
|
*/
|
||
|
|
#ifndef yasm__combpath
|
||
|
|
# if defined (_WIN32) || defined (WIN32) || defined (__MSDOS__) || \
|
||
|
|
defined (__DJGPP__) || defined (__OS2__)
|
||
|
|
# define yasm__combpath(from, to) yasm__combpath_win(from, to)
|
||
|
|
# else
|
||
|
|
# define yasm__combpath(from, to) yasm__combpath_unix(from, to)
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/** Recursively create tree of directories needed for pathname.
|
||
|
|
* \internal
|
||
|
|
* \param path pathname
|
||
|
|
* \param win handle windows paths
|
||
|
|
* \return Length of directory portion of pathname.
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
size_t yasm__createpath_common(const char *path, int win);
|
||
|
|
|
||
|
|
/** Recursively create tree of directories needed for pathname.
|
||
|
|
* Unless otherwise defined, defaults to yasm__createpath_unix().
|
||
|
|
* \internal
|
||
|
|
* \param path pathname
|
||
|
|
* \return Length of directory portion of pathname.
|
||
|
|
*/
|
||
|
|
#ifndef yasm__createpath
|
||
|
|
# if defined (_WIN32) || defined (WIN32) || defined (__MSDOS__) || \
|
||
|
|
defined (__DJGPP__) || defined (__OS2__)
|
||
|
|
# define yasm__createpath(path) yasm__createpath_common(path, 1)
|
||
|
|
# else
|
||
|
|
# define yasm__createpath(path) yasm__createpath_common(path, 0)
|
||
|
|
# endif
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/** Try to find and open an include file, searching through include paths.
|
||
|
|
* First iname is looked for relative to the directory containing "from", then
|
||
|
|
* it's looked for relative to each of the include paths.
|
||
|
|
*
|
||
|
|
* All pathnames may be either absolute or relative; from, oname, and
|
||
|
|
* include paths, if relative, are relative from the current working directory.
|
||
|
|
*
|
||
|
|
* First match wins; the full pathname (newly allocated) to the opened file
|
||
|
|
* is saved into oname, and the fopen'ed FILE * is returned. If not found,
|
||
|
|
* NULL is returned.
|
||
|
|
*
|
||
|
|
* \param iname file to include
|
||
|
|
* \param from file doing the including
|
||
|
|
* \param mode fopen mode string
|
||
|
|
* \param oname full pathname of included file (may be relative). NULL
|
||
|
|
* may be passed if this is unwanted.
|
||
|
|
* \return fopen'ed include file, or NULL if not found.
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
/*@null@*/ FILE *yasm_fopen_include
|
||
|
|
(const char *iname, const char *from, const char *mode,
|
||
|
|
/*@null@*/ /*@out@*/ /*@only@*/ char **oname);
|
||
|
|
|
||
|
|
/** Delete any stored include paths added by yasm_add_include_path().
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
void yasm_delete_include_paths(void);
|
||
|
|
|
||
|
|
/** Iterate through include paths.
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
const char * yasm_get_include_dir(void **iter);
|
||
|
|
|
||
|
|
/** Add an include path for use by yasm_fopen_include().
|
||
|
|
* If path is relative, it is treated by yasm_fopen_include() as relative to
|
||
|
|
* the current working directory.
|
||
|
|
*
|
||
|
|
* \param path path to add
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
void yasm_add_include_path(const char *path);
|
||
|
|
|
||
|
|
/** Write an 8-bit value to a buffer, incrementing buffer pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 8-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_WRITE_8(ptr, val) \
|
||
|
|
*((ptr)++) = (unsigned char)((val) & 0xFF)
|
||
|
|
|
||
|
|
/** Write a 16-bit value to a buffer in little endian, incrementing buffer
|
||
|
|
* pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 16-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_WRITE_16_L(ptr, val) \
|
||
|
|
do { \
|
||
|
|
*((ptr)++) = (unsigned char)((val) & 0xFF); \
|
||
|
|
*((ptr)++) = (unsigned char)(((val) >> 8) & 0xFF); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/** Write a 32-bit value to a buffer in little endian, incrementing buffer
|
||
|
|
* pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 32-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_WRITE_32_L(ptr, val) \
|
||
|
|
do { \
|
||
|
|
*((ptr)++) = (unsigned char)((val) & 0xFF); \
|
||
|
|
*((ptr)++) = (unsigned char)(((val) >> 8) & 0xFF); \
|
||
|
|
*((ptr)++) = (unsigned char)(((val) >> 16) & 0xFF); \
|
||
|
|
*((ptr)++) = (unsigned char)(((val) >> 24) & 0xFF); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/** Write a 16-bit value to a buffer in big endian, incrementing buffer
|
||
|
|
* pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 16-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_WRITE_16_B(ptr, val) \
|
||
|
|
do { \
|
||
|
|
*((ptr)++) = (unsigned char)(((val) >> 8) & 0xFF); \
|
||
|
|
*((ptr)++) = (unsigned char)((val) & 0xFF); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/** Write a 32-bit value to a buffer in big endian, incrementing buffer
|
||
|
|
* pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 32-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_WRITE_32_B(ptr, val) \
|
||
|
|
do { \
|
||
|
|
*((ptr)++) = (unsigned char)(((val) >> 24) & 0xFF); \
|
||
|
|
*((ptr)++) = (unsigned char)(((val) >> 16) & 0xFF); \
|
||
|
|
*((ptr)++) = (unsigned char)(((val) >> 8) & 0xFF); \
|
||
|
|
*((ptr)++) = (unsigned char)((val) & 0xFF); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
|
||
|
|
/** Write an 8-bit value to a buffer. Does not increment buffer pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 8-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_SAVE_8(ptr, val) \
|
||
|
|
*(ptr) = (unsigned char)((val) & 0xFF)
|
||
|
|
|
||
|
|
/** Write a 16-bit value to a buffer in little endian. Does not increment
|
||
|
|
* buffer pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 16-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_SAVE_16_L(ptr, val) \
|
||
|
|
do { \
|
||
|
|
*(ptr) = (unsigned char)((val) & 0xFF); \
|
||
|
|
*((ptr)+1) = (unsigned char)(((val) >> 8) & 0xFF); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/** Write a 32-bit value to a buffer in little endian. Does not increment
|
||
|
|
* buffer pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 32-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_SAVE_32_L(ptr, val) \
|
||
|
|
do { \
|
||
|
|
*(ptr) = (unsigned char)((val) & 0xFF); \
|
||
|
|
*((ptr)+1) = (unsigned char)(((val) >> 8) & 0xFF); \
|
||
|
|
*((ptr)+2) = (unsigned char)(((val) >> 16) & 0xFF); \
|
||
|
|
*((ptr)+3) = (unsigned char)(((val) >> 24) & 0xFF); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/** Write a 16-bit value to a buffer in big endian. Does not increment buffer
|
||
|
|
* pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 16-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_SAVE_16_B(ptr, val) \
|
||
|
|
do { \
|
||
|
|
*(ptr) = (unsigned char)(((val) >> 8) & 0xFF); \
|
||
|
|
*((ptr)+1) = (unsigned char)((val) & 0xFF); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/** Write a 32-bit value to a buffer in big endian. Does not increment buffer
|
||
|
|
* pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 32-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_SAVE_32_B(ptr, val) \
|
||
|
|
do { \
|
||
|
|
*(ptr) = (unsigned char)(((val) >> 24) & 0xFF); \
|
||
|
|
*((ptr)+1) = (unsigned char)(((val) >> 16) & 0xFF); \
|
||
|
|
*((ptr)+2) = (unsigned char)(((val) >> 8) & 0xFF); \
|
||
|
|
*((ptr)+3) = (unsigned char)((val) & 0xFF); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/** Direct-to-file version of YASM_SAVE_16_L().
|
||
|
|
* \note Using the macro multiple times with a single fwrite() call will
|
||
|
|
* probably be faster than calling this function many times.
|
||
|
|
* \param val 16-bit value
|
||
|
|
* \param f file
|
||
|
|
* \return 1 if the write was successful, 0 if not (just like fwrite()).
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
size_t yasm_fwrite_16_l(unsigned short val, FILE *f);
|
||
|
|
|
||
|
|
/** Direct-to-file version of YASM_SAVE_32_L().
|
||
|
|
* \note Using the macro multiple times with a single fwrite() call will
|
||
|
|
* probably be faster than calling this function many times.
|
||
|
|
* \param val 32-bit value
|
||
|
|
* \param f file
|
||
|
|
* \return 1 if the write was successful, 0 if not (just like fwrite()).
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
size_t yasm_fwrite_32_l(unsigned long val, FILE *f);
|
||
|
|
|
||
|
|
/** Direct-to-file version of YASM_SAVE_16_B().
|
||
|
|
* \note Using the macro multiple times with a single fwrite() call will
|
||
|
|
* probably be faster than calling this function many times.
|
||
|
|
* \param val 16-bit value
|
||
|
|
* \param f file
|
||
|
|
* \return 1 if the write was successful, 0 if not (just like fwrite()).
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
size_t yasm_fwrite_16_b(unsigned short val, FILE *f);
|
||
|
|
|
||
|
|
/** Direct-to-file version of YASM_SAVE_32_B().
|
||
|
|
* \note Using the macro multiple times with a single fwrite() call will
|
||
|
|
* probably be faster than calling this function many times.
|
||
|
|
* \param val 32-bit value
|
||
|
|
* \param f file
|
||
|
|
* \return 1 if the write was successful, 0 if not (just like fwrite()).
|
||
|
|
*/
|
||
|
|
YASM_LIB_DECL
|
||
|
|
size_t yasm_fwrite_32_b(unsigned long val, FILE *f);
|
||
|
|
|
||
|
|
/** Read an 8-bit value from a buffer, incrementing buffer pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 8-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_READ_8(val, ptr) \
|
||
|
|
(val) = *((ptr)++) & 0xFF
|
||
|
|
|
||
|
|
/** Read a 16-bit value from a buffer in little endian, incrementing buffer
|
||
|
|
* pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 16-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_READ_16_L(val, ptr) \
|
||
|
|
do { \
|
||
|
|
(val) = *((ptr)++) & 0xFF; \
|
||
|
|
(val) |= (*((ptr)++) & 0xFF) << 8; \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/** Read a 32-bit value from a buffer in little endian, incrementing buffer
|
||
|
|
* pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 32-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_READ_32_L(val, ptr) \
|
||
|
|
do { \
|
||
|
|
(val) = *((ptr)++) & 0xFF; \
|
||
|
|
(val) |= (*((ptr)++) & 0xFF) << 8; \
|
||
|
|
(val) |= (*((ptr)++) & 0xFF) << 16; \
|
||
|
|
(val) |= (*((ptr)++) & 0xFF) << 24; \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/** Read a 16-bit value from a buffer in big endian, incrementing buffer
|
||
|
|
* pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 16-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_READ_16_B(val, ptr) \
|
||
|
|
do { \
|
||
|
|
(val) = (*((ptr)++) & 0xFF) << 8; \
|
||
|
|
(val) |= *((ptr)++) & 0xFF; \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/** Read a 32-bit value from a buffer in big endian, incrementing buffer
|
||
|
|
* pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 32-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_READ_32_B(val, ptr) \
|
||
|
|
do { \
|
||
|
|
(val) = (*((ptr)++) & 0xFF) << 24; \
|
||
|
|
(val) |= (*((ptr)++) & 0xFF) << 16; \
|
||
|
|
(val) |= (*((ptr)++) & 0xFF) << 8; \
|
||
|
|
(val) |= *((ptr)++) & 0xFF; \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/** Read an 8-bit value from a buffer. Does not increment buffer pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 8-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_LOAD_8(val, ptr) \
|
||
|
|
(val) = *(ptr) & 0xFF
|
||
|
|
|
||
|
|
/** Read a 16-bit value from a buffer in little endian. Does not increment
|
||
|
|
* buffer pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 16-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_LOAD_16_L(val, ptr) \
|
||
|
|
do { \
|
||
|
|
(val) = *(ptr) & 0xFF; \
|
||
|
|
(val) |= (*((ptr)+1) & 0xFF) << 8; \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/** Read a 32-bit value from a buffer in little endian. Does not increment
|
||
|
|
* buffer pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 32-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_LOAD_32_L(val, ptr) \
|
||
|
|
do { \
|
||
|
|
(val) = (unsigned long)(*(ptr) & 0xFF); \
|
||
|
|
(val) |= (unsigned long)((*((ptr)+1) & 0xFF) << 8); \
|
||
|
|
(val) |= (unsigned long)((*((ptr)+2) & 0xFF) << 16); \
|
||
|
|
(val) |= (unsigned long)((*((ptr)+3) & 0xFF) << 24); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/** Read a 16-bit value from a buffer in big endian. Does not increment buffer
|
||
|
|
* pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 16-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_LOAD_16_B(val, ptr) \
|
||
|
|
do { \
|
||
|
|
(val) = (*(ptr) & 0xFF) << 8; \
|
||
|
|
(val) |= *((ptr)+1) & 0xFF; \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
/** Read a 32-bit value from a buffer in big endian. Does not increment buffer
|
||
|
|
* pointer.
|
||
|
|
* \note Only works properly if ptr is an (unsigned char *).
|
||
|
|
* \param ptr buffer
|
||
|
|
* \param val 32-bit value
|
||
|
|
*/
|
||
|
|
#define YASM_LOAD_32_B(val, ptr) \
|
||
|
|
do { \
|
||
|
|
(val) = (unsigned long)((*(ptr) & 0xFF) << 24); \
|
||
|
|
(val) |= (unsigned long)((*((ptr)+1) & 0xFF) << 16); \
|
||
|
|
(val) |= (unsigned long)((*((ptr)+2) & 0xFF) << 8); \
|
||
|
|
(val) |= (unsigned long)(*((ptr)+3) & 0xFF); \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
#endif
|