byte_manager.c File Reference

#include <stdio.h>
#include <sys/types.h>
#include <unistd.h>
#include <stdlib.h>
#include <sys/stat.h>
#include "byte_manager.h"

Macros
#define	FCGI_stdout   stdout
#define	FCGI_stderr   stderr
#define	logstream   stderr

Functions
Byte_t *	fetch_bytes (int fd, OPJ_OFF_T offset, OPJ_SIZE_T size)
	fetch bytes of data in file stream More...
Byte_t	fetch_1byte (int fd, OPJ_OFF_T offset)
	fetch a 1-byte Byte codes in file stream More...
Byte2_t	fetch_2bytebigendian (int fd, OPJ_OFF_T offset)
	fetch a 2-byte big endian Byte codes in file stream More...
Byte4_t	fetch_4bytebigendian (int fd, OPJ_OFF_T offset)
	fetch a 4-byte big endian Byte codes in file stream More...
Byte8_t	fetch_8bytebigendian (int fd, OPJ_OFF_T offset)
	fetch a 8-byte big endian Byte codes in file stream More...
Byte2_t	big2 (Byte_t *buf)
	convert 2-byte big endian Byte codes to number More...
Byte4_t	big4 (Byte_t *buf)
	convert 4-byte big endian Byte codes to number More...
Byte8_t	big8 (Byte_t *buf)
	convert 8-byte big endian Byte codes to number More...
void	modify_4Bytecode (Byte4_t code, Byte_t *stream)
	modify 4Byte code in a codestream More...
OPJ_OFF_T	get_filesize (int fd)
	Get file size. More...

Macro Definition Documentation

#define FCGI_stderr   stderr

Referenced by fetch_1byte(), fetch_2bytebigendian(), fetch_4bytebigendian(), fetch_8bytebigendian(), fetch_bytes(), and get_filesize().

#define FCGI_stdout   stdout

Referenced by fetch_1byte(), fetch_bytes(), and get_filesize().

#define logstream   stderr

Function Documentation

Byte2_t big2

(

Byte_t *

buf

)

convert 2-byte big endian Byte codes to number

Parameters

[in]

buf

Byte codes

Returns

resolved number

Referenced by fetch_2bytebigendian(), gene_ihdrbox(), get_CODmkrdata_from_j2kstream(), get_mainheader_from_j2kstream(), get_SIZmkrdata_from_j2kstream(), and modify_COCmkrstream().

Byte4_t big4

(

Byte_t *

buf

)

convert 4-byte big endian Byte codes to number

Parameters

[in]

buf

Byte codes

Returns

resolved number

Referenced by add_emptyboxstream(), big8(), fetch_4bytebigendian(), gene_boxbyOffinStream(), gene_boxbyOffset(), gene_boxbyType(), gene_boxbyTypeinStream(), gene_ihdrbox(), get_SIZmkrdata_from_j2kstream(), and parse_phld().

Byte8_t big8

(

Byte_t *

buf

)

convert 8-byte big endian Byte codes to number

Parameters

[in]

buf

Byte codes

Returns

resolved number

References big4().

Referenced by add_emptyboxstream(), fetch_8bytebigendian(), gene_boxbyOffinStream(), gene_boxbyOffset(), gene_boxbyType(), gene_boxbyTypeinStream(), and parse_phld().

Byte_t fetch_1byte	(	int	fd,
		OPJ_OFF_T	offset
	)

fetch a 1-byte Byte codes in file stream

Parameters

[in]	fd	file discriptor
[in]	offset	start Byte position

Returns

fetched codes

References FCGI_stderr, and FCGI_stdout.

Referenced by fetch_codestream1byte(), and fetch_DBox1byte().

Byte2_t fetch_2bytebigendian	(	int	fd,
		OPJ_OFF_T	offset
	)

fetch a 2-byte big endian Byte codes in file stream

Parameters

[in]	fd	file discriptor
[in]	offset	start Byte position

Returns

fetched codes

References big2(), FCGI_stderr, and fetch_bytes().

Referenced by fetch_codestream2bytebigendian(), and fetch_DBox2bytebigendian().

Byte4_t fetch_4bytebigendian	(	int	fd,
		OPJ_OFF_T	offset
	)

fetch a 4-byte big endian Byte codes in file stream

Parameters

[in]	fd	file discriptor
[in]	offset	start Byte position

Returns

fetched codes

References big4(), FCGI_stderr, and fetch_bytes().

Referenced by fetch_codestream4bytebigendian(), fetch_DBox4bytebigendian(), and gene_boxheader().

Byte8_t fetch_8bytebigendian	(	int	fd,
		OPJ_OFF_T	offset
	)

fetch a 8-byte big endian Byte codes in file stream

Parameters

[in]	fd	file discriptor
[in]	offset	start Byte position

Returns

fetched codes

References big8(), FCGI_stderr, and fetch_bytes().

Referenced by fetch_DBox8bytebigendian(), and gene_boxheader().

Byte_t* fetch_bytes	(	int	fd,
		OPJ_OFF_T	offset,
		OPJ_SIZE_T	size
	)

fetch bytes of data in file stream

Parameters

[in]	fd	file discriptor
[in]	offset	start Byte position
[in]	size	Byte length

Returns

pointer to the fetched data

References FCGI_stderr, and FCGI_stdout.

Referenced by add_body_stream(), fetch_2bytebigendian(), fetch_4bytebigendian(), fetch_8bytebigendian(), fetch_codestreambytes(), fetch_DBoxbytes(), fetch_headbytes(), gene_boxbyOffset(), gene_boxbyType(), and gene_boxheader().

OPJ_OFF_T get_filesize

(

int

fd

)

Get file size.

Parameters

[in]

fd

file discriptor

Returns

file size

References FCGI_stderr, and FCGI_stdout.

Referenced by const_metadatalist(), fread_jpip(), gene_boxbyType(), and parse_jp2file().

void modify_4Bytecode	(	Byte4_t	code,
		Byte_t *	stream
	)

modify 4Byte code in a codestream

Parameters

[in]	code	code value
[out]	stream	modifying codestream

Referenced by modify_SIZmkrstream(), and modify_tileheader().