YASM file helpers. More...

Data Structures
struct	yasm_scanner
	Re2c scanner state. More...
Defines
#define	YASM_LIB_DECL
#define	yasm__splitpath(path, tail) yasm__splitpath_unix(path, tail)
	Split a pathname into head (directory) and tail (base filename) portions.
#define	yasm__combpath(from, to) yasm__combpath_unix(from, to)
	Build a pathname that is equivalent to accessing the "to" pathname when you're in the directory containing "from".
#define	yasm__createpath(path) yasm__createpath_common(path, 0)
	Recursively create tree of directories needed for pathname.
#define	YASM_WRITE_8(ptr, val) *((ptr)++) = (unsigned char)((val) & 0xFF)
	Write an 8-bit value to a buffer, incrementing buffer pointer.
#define	YASM_WRITE_16_L(ptr, val)
	Write a 16-bit value to a buffer in little endian, incrementing buffer pointer.
#define	YASM_WRITE_32_L(ptr, val)
	Write a 32-bit value to a buffer in little endian, incrementing buffer pointer.
#define	YASM_WRITE_16_B(ptr, val)
	Write a 16-bit value to a buffer in big endian, incrementing buffer pointer.
#define	YASM_WRITE_32_B(ptr, val)
	Write a 32-bit value to a buffer in big endian, incrementing buffer pointer.
#define	YASM_SAVE_8(ptr, val) *(ptr) = (unsigned char)((val) & 0xFF)
	Write an 8-bit value to a buffer.
#define	YASM_SAVE_16_L(ptr, val)
	Write a 16-bit value to a buffer in little endian.
#define	YASM_SAVE_32_L(ptr, val)
	Write a 32-bit value to a buffer in little endian.
#define	YASM_SAVE_16_B(ptr, val)
	Write a 16-bit value to a buffer in big endian.
#define	YASM_SAVE_32_B(ptr, val)
	Write a 32-bit value to a buffer in big endian.
#define	YASM_READ_8(val, ptr) (val) = *((ptr)++) & 0xFF
	Read an 8-bit value from a buffer, incrementing buffer pointer.
#define	YASM_READ_16_L(val, ptr)
	Read a 16-bit value from a buffer in little endian, incrementing buffer pointer.
#define	YASM_READ_32_L(val, ptr)
	Read a 32-bit value from a buffer in little endian, incrementing buffer pointer.
#define	YASM_READ_16_B(val, ptr)
	Read a 16-bit value from a buffer in big endian, incrementing buffer pointer.
#define	YASM_READ_32_B(val, ptr)
	Read a 32-bit value from a buffer in big endian, incrementing buffer pointer.
#define	YASM_LOAD_8(val, ptr) (val) = *(ptr) & 0xFF
	Read an 8-bit value from a buffer.
#define	YASM_LOAD_16_L(val, ptr)
	Read a 16-bit value from a buffer in little endian.
#define	YASM_LOAD_32_L(val, ptr)
	Read a 32-bit value from a buffer in little endian.
#define	YASM_LOAD_16_B(val, ptr)
	Read a 16-bit value from a buffer in big endian.
#define	YASM_LOAD_32_B(val, ptr)
	Read a 32-bit value from a buffer in big endian.
Typedefs
typedef struct yasm_scanner	yasm_scanner
	Re2c scanner state.
Functions
YASM_LIB_DECL void	yasm_scanner_initialize (yasm_scanner *scanner)
	Initialize scanner state.
YASM_LIB_DECL void	yasm_scanner_delete (yasm_scanner *scanner)
	Frees any memory used by scanner state; does not free state itself.
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)
	Fill a scanner state structure with data coming from an input function.
YASM_LIB_DECL void	yasm_unescape_cstring (unsigned char str, size_t len)
	Unescape a string with C-style escapes.
YASM_LIB_DECL size_t	yasm__splitpath_unix (const char path, const char *tail)
	Split a UNIX pathname into head (directory) and tail (base filename) portions.
YASM_LIB_DECL size_t	yasm__splitpath_win (const char path, const char *tail)
	Split a Windows pathname into head (directory) and tail (base filename) portions.
YASM_LIB_DECL char *	yasm__getcwd (void)
	Get the current working directory.
YASM_LIB_DECL char *	yasm__abspath (const char *path)
	Convert a relative or absolute pathname into an absolute pathname.
YASM_LIB_DECL char *	yasm__combpath_unix (const char from, const char to)
	Build a UNIX pathname that is equivalent to accessing the "to" pathname when you're in the directory containing "from".
YASM_LIB_DECL char *	yasm__combpath_win (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".
YASM_LIB_DECL size_t	yasm__createpath_common (const char *path, int win)
	Recursively create tree of directories needed for pathname.
YASM_LIB_DECL FILE *	yasm_fopen_include (const char iname, const char from, const char mode, char *oname)
	Try to find and open an include file, searching through include paths.
YASM_LIB_DECL void	yasm_delete_include_paths (void)
	Delete any stored include paths added by yasm_add_include_path().
YASM_LIB_DECL const char *	yasm_get_include_dir (void **iter)
	Iterate through include paths.
YASM_LIB_DECL void	yasm_add_include_path (const char *path)
	Add an include path for use by yasm_fopen_include().
YASM_LIB_DECL size_t	yasm_fwrite_16_l (unsigned short val, FILE *f)
	Direct-to-file version of YASM_SAVE_16_L().
YASM_LIB_DECL size_t	yasm_fwrite_32_l (unsigned long val, FILE *f)
	Direct-to-file version of YASM_SAVE_32_L().
YASM_LIB_DECL size_t	yasm_fwrite_16_b (unsigned short val, FILE *f)
	Direct-to-file version of YASM_SAVE_16_B().
YASM_LIB_DECL size_t	yasm_fwrite_32_b (unsigned long val, FILE *f)
	Direct-to-file version of YASM_SAVE_32_B().

Detailed Description

YASM file helpers.

Definition in file file.h.

Define Documentation

#define yasm__combpath	(	from,
		to
	)	yasm__combpath_unix(from, 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().

Parameters:

from	from pathname
to	to pathname

Returns:: Combined path (newly allocated).

Definition at line 174 of file file.h.

#define yasm__createpath ( path ) yasm__createpath_common(path, 0)

Recursively create tree of directories needed for pathname.

Unless otherwise defined, defaults to yasm__createpath_unix().

Parameters:

path pathname

Returns:: Length of directory portion of pathname.

Definition at line 198 of file file.h.

#define yasm__splitpath	(	path,
		tail
	)	yasm__splitpath_unix(path, tail)

Split a pathname into head (directory) and tail (base filename) portions.

Unless otherwise defined, defaults to yasm__splitpath_unix().

Parameters:

path	pathname
tail	(returned) base filename

Returns:: Length of head (directory).

Definition at line 119 of file file.h.

#define YASM_LOAD_16_B	(	val,
		ptr
	)

Value:

do {                                    \
            (val) = (*(ptr) & 0xFF) << 8;       \
            (val) |= *((ptr)+1) & 0xFF;         \
        } 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 *).

Parameters:

ptr	buffer
val	16-bit value

Definition at line 505 of file file.h.

#define YASM_LOAD_16_L	(	val,
		ptr
	)

Value:

do {                                    \
            (val) = *(ptr) & 0xFF;              \
            (val) |= (*((ptr)+1) & 0xFF) << 8;  \
        } while (0)

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 *).

Parameters:

ptr	buffer
val	16-bit value

Definition at line 479 of file file.h.

#define YASM_LOAD_32_B	(	val,
		ptr
	)

Value:

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)

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 *).

Parameters:

ptr	buffer
val	32-bit value

Definition at line 517 of file file.h.

#define YASM_LOAD_32_L	(	val,
		ptr
	)

Value:

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 32-bit value from a buffer in little endian.

Does not increment buffer pointer.

Note:: Only works properly if ptr is an (unsigned char *).

Parameters:

ptr	buffer
val	32-bit value

Definition at line 491 of file file.h.

#define YASM_LOAD_8	(	val,
		ptr
	)	(val) = *(ptr) & 0xFF

Read an 8-bit value from a buffer.

Does not increment buffer pointer.

Note:: Only works properly if ptr is an (unsigned char *).

Parameters:

ptr	buffer
val	8-bit value

Definition at line 470 of file file.h.

#define YASM_READ_16_B	(	val,
		ptr
	)

Value:

do {                                    \
            (val) = (*((ptr)++) & 0xFF) << 8;   \
            (val) |= *((ptr)++) & 0xFF;         \
        } 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 *).

Parameters:

ptr	buffer
val	16-bit value

Definition at line 445 of file file.h.

#define YASM_READ_16_L	(	val,
		ptr
	)

Value:

do {                                    \
            (val) = *((ptr)++) & 0xFF;          \
            (val) |= (*((ptr)++) & 0xFF) << 8;  \
        } while (0)

Read a 16-bit value from a buffer in little endian, incrementing buffer pointer.

Note:: Only works properly if ptr is an (unsigned char *).

Parameters:

ptr	buffer
val	16-bit value

Definition at line 419 of file file.h.

#define YASM_READ_32_B	(	val,
		ptr
	)

Value:

do {                                    \
            (val) = (*((ptr)++) & 0xFF) << 24;  \
            (val) |= (*((ptr)++) & 0xFF) << 16; \
            (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 *).

Parameters:

ptr	buffer
val	32-bit value

Definition at line 457 of file file.h.

#define YASM_READ_32_L	(	val,
		ptr
	)

Value:

do {                                    \
            (val) = *((ptr)++) & 0xFF;          \
            (val) |= (*((ptr)++) & 0xFF) << 8;  \
            (val) |= (*((ptr)++) & 0xFF) << 16; \
            (val) |= (*((ptr)++) & 0xFF) << 24; \
        } 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 *).

Parameters:

ptr	buffer
val	32-bit value

Definition at line 431 of file file.h.

#define YASM_READ_8	(	val,
		ptr
	)	(val) = *((ptr)++) & 0xFF

Read an 8-bit value from a buffer, incrementing buffer pointer.

Note:: Only works properly if ptr is an (unsigned char *).

Parameters:

ptr	buffer
val	8-bit value

Definition at line 410 of file file.h.

#define YASM_SAVE_16_B	(	ptr,
		val
	)

Value:

do {                                    \
            *(ptr) = (unsigned char)(((val) >> 8) & 0xFF);      \
            *((ptr)+1) = (unsigned char)((val) & 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 *).

Parameters:

ptr	buffer
val	16-bit value

Definition at line 345 of file file.h.

#define YASM_SAVE_16_L	(	ptr,
		val
	)

Value:

do {                                    \
            *(ptr) = (unsigned char)((val) & 0xFF);             \
            *((ptr)+1) = (unsigned char)(((val) >> 8) & 0xFF);  \
        } while (0)

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 *).

Parameters:

ptr	buffer
val	16-bit value

Definition at line 319 of file file.h.

#define YASM_SAVE_32_B	(	ptr,
		val
	)

Value:

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)

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 *).

Parameters:

ptr	buffer
val	32-bit value

Definition at line 357 of file file.h.

#define YASM_SAVE_32_L	(	ptr,
		val
	)

Value:

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 32-bit value to a buffer in little endian.

Does not increment buffer pointer.

Note:: Only works properly if ptr is an (unsigned char *).

Parameters:

ptr	buffer
val	32-bit value

Definition at line 331 of file file.h.

#define YASM_SAVE_8	(	ptr,
		val
	)	*(ptr) = (unsigned char)((val) & 0xFF)

Write an 8-bit value to a buffer.

Does not increment buffer pointer.

Note:: Only works properly if ptr is an (unsigned char *).

Parameters:

ptr	buffer
val	8-bit value

Definition at line 310 of file file.h.

#define YASM_WRITE_16_B	(	ptr,
		val
	)

Value:

do {                                    \
            *((ptr)++) = (unsigned char)(((val) >> 8) & 0xFF);  \
            *((ptr)++) = (unsigned char)((val) & 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 *).

Parameters:

ptr	buffer
val	16-bit value

Definition at line 284 of file file.h.

#define YASM_WRITE_16_L	(	ptr,
		val
	)

Value:

do {                                    \
            *((ptr)++) = (unsigned char)((val) & 0xFF);         \
            *((ptr)++) = (unsigned char)(((val) >> 8) & 0xFF);  \
        } while (0)

Write a 16-bit value to a buffer in little endian, incrementing buffer pointer.

Note:: Only works properly if ptr is an (unsigned char *).

Parameters:

ptr	buffer
val	16-bit value

Definition at line 258 of file file.h.

#define YASM_WRITE_32_B	(	ptr,
		val
	)

Value:

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 a 32-bit value to a buffer in big endian, incrementing buffer pointer.

Note:: Only works properly if ptr is an (unsigned char *).

Parameters:

ptr	buffer
val	32-bit value

Definition at line 296 of file file.h.

#define YASM_WRITE_32_L	(	ptr,
		val
	)

Value:

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 32-bit value to a buffer in little endian, incrementing buffer pointer.

Note:: Only works properly if ptr is an (unsigned char *).

Parameters:

ptr	buffer
val	32-bit value

Definition at line 270 of file file.h.

#define YASM_WRITE_8	(	ptr,
		val
	)	*((ptr)++) = (unsigned char)((val) & 0xFF)

Write an 8-bit value to a buffer, incrementing buffer pointer.

Note:: Only works properly if ptr is an (unsigned char *).

Parameters:

ptr	buffer
val	8-bit value

Definition at line 249 of file file.h.

Typedef Documentation

typedef struct yasm_scanner yasm_scanner

Re2c scanner state.

Function Documentation

YASM_LIB_DECL char* yasm__abspath ( const char * path )

Convert a relative or absolute pathname into an absolute pathname.

Parameters:

path pathname

Returns:: Absolute version of path (newly allocated).

YASM_LIB_DECL char* yasm__combpath_unix	(	const char *	from,
		const char *	to
	)

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.

Parameters:

from	from pathname
to	to pathname

Returns:: Combined path (newly allocated).

YASM_LIB_DECL char* yasm__combpath_win	(	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.

Parameters:

from	from pathname
to	to pathname

Returns:: Combined path (newly allocated).

YASM_LIB_DECL size_t yasm__createpath_common	(	const char *	path,
		int	win
	)

Recursively create tree of directories needed for pathname.

Parameters:

path	pathname
win	handle windows paths

Returns:: Length of directory portion of pathname.

YASM_LIB_DECL char* yasm__getcwd ( void )

Get the current working directory.

Returns:: Current working directory pathname (newly allocated).

YASM_LIB_DECL size_t yasm__splitpath_unix	(	const char *	path,
		const char **	tail
	)

Split a UNIX pathname into head (directory) and tail (base filename) portions.

Parameters:

path	pathname
tail	(returned) base filename

Returns:: Length of head (directory).

YASM_LIB_DECL size_t yasm__splitpath_win	(	const char *	path,
		const char **	tail
	)

Split a Windows pathname into head (directory) and tail (base filename) portions.

Parameters:

path	pathname
tail	(returned) base filename

Returns:: Length of head (directory).

YASM_LIB_DECL void yasm_add_include_path ( const char * path )

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.

Parameters:

path	path to add

YASM_LIB_DECL int yasm_fill_helper	(	yasm_scanner *	scanner,
		unsigned char **	cursor,
		size_t()(void d, unsigned char *buf, size_t max)	input_func,
		void *	input_func_data
	)

Fill a scanner state structure with data coming from an input function.

Parameters:

scanner	Re2c scanner state
cursor	Re2c scan cursor
input_func	Input function to read data; takes buffer and maximum number of bytes, returns number of bytes read.
input_func_data	Data to pass as the first parameter to input_func

Returns:: 1 if this was the first time this function was called on this scanner state, 0 otherwise.

YASM_LIB_DECL FILE* yasm_fopen_include	(	const char *	iname,
		const char *	from,
		const char *	mode,
		char **	oname
	)

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.

Parameters:

iname	file to include
from	file doing the including
mode	fopen mode string
oname	full pathname of included file (may be relative). NULL may be passed if this is unwanted.

Returns:: fopen'ed include file, or NULL if not found.

YASM_LIB_DECL size_t yasm_fwrite_16_b	(	unsigned short	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.

Parameters:

val	16-bit value
f	file

Returns:: 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_16_L().

Note:: Using the macro multiple times with a single fwrite() call will probably be faster than calling this function many times.

Parameters:

val	16-bit value
f	file

Returns:: 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
	)

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.

Parameters:

val	32-bit value
f	file

Returns:: 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_32_L().

Note:: Using the macro multiple times with a single fwrite() call will probably be faster than calling this function many times.

Parameters:

val	32-bit value
f	file

Returns:: 1 if the write was successful, 0 if not (just like fwrite()).

YASM_LIB_DECL void yasm_scanner_delete ( yasm_scanner * scanner )

Frees any memory used by scanner state; does not free state itself.

Parameters:

scanner Re2c scanner state

YASM_LIB_DECL void yasm_scanner_initialize ( yasm_scanner * scanner )

Initialize scanner state.

Parameters:

scanner Re2c scanner state

YASM_LIB_DECL void yasm_unescape_cstring	(	unsigned char *	str,
		size_t *	len
	)

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.
Parameters:

str C-style string (updated in place)

len length of string (updated with new length)

str	C-style string (updated in place)
len	length of string (updated with new length)

libyasm/file.h File Reference

Data Structures

Defines

Typedefs

Functions

Detailed Description

Define Documentation

Typedef Documentation

Function Documentation