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GLAST/LAT > DAQ and FSW > FSW > Doxygen Index > ZLIB / V2-2-0

Constituent: zlib_file_compress     Tag: rad750

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ZLIB_file_compress.c File Reference

File compression utilities using the ZLIB decoder. More...

#include "stdlib.h"
#include "unistd.h"
#include "fcntl.h"
#include "errno.h"
#include "sys/types.h"
#include "sys/stat.h"
#include "ZLIB/zlib.h"
#include "ZLIB/ZLIB_file_compress.h"
#include "PBS/BSWP.h"
#include "PBS/MBA.h"
#include "MSG/MSG_pubdefs.h"

Include dependency graph for ZLIB_file_compress.c:

Functions
unsigned int	ZLIB_fileCompressError (int errCode, const char *func, const char *msg)
void *	ZLIB_fileCompressAlloc (void *opaque, unsigned int numItems, unsigned int size)
void	ZLIB_fileCompressFree (void *opaque, void *address)
unsigned int	ZLIB_fileCompressFromFile (int in, int out, unsigned int bufSize)
	Compress a file into an output file.
unsigned int	ZLIB_fileCompressFromMem (void *inBuf, int out, unsigned int inSize, unsigned int bufSize)
	Compress a memory region into an output file.

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Detailed Description

File compression utilities using the ZLIB decoder.

Author:

D.L. Wood

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Function Documentation

void * ZLIB_fileCompressAlloc (  void *  opaque, unsigned int  numItems, unsigned int  size )  [static]

Memory allocation callback for ZLIB stream. Parameters: opaque  Ignored. numItems  The number of items to allocate. size  The size in bytes of each item. Returns: A pointer to the allocated memory, or NULL on failure.

unsigned int ZLIB_fileCompressError (  int  errCode, const char *  func, const char *  msg )  [static]

This function translates ZLIB native error codes into local error codes. Parameters: errCode  The ZLIB error code. func  The name of the function in which the error occurred. msg  A message to print out in the MSG output. Returns: The local error code value.

void ZLIB_fileCompressFree (  void *  opaque, void *  address )  [static]

Memory release callback for ZLIB stream. Parameters: opaque  Ignored. address  Pointer to memory to free. Returns: A pointer to the allocated memory, or NULL on failure.

unsigned int ZLIB_fileCompressFromFile (  int  in, int  out, unsigned int  bufSize )

Compress a file into an output file. This function uses the ZLIB memory to memory inflation library to compress an input file to an output file. Temporary buffer storage of the streams is minimized. The in and out file handles must already have been opened. This function will not close the file handles, and may leave the file pointers at an offset within the file. The out file offset should point to the place where the compression record starts within the output file. Parameters: in  The input file handle. out  The compressed output file handle. bufSize  The size in bytes to allocate for stream buffering. Returns: A ZLIB MSG code.

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unsigned int ZLIB_fileCompressFromMem (  void *  inBuf, int  out, unsigned int  inSize, unsigned int  bufSize )

Compress a memory region into an output file. This function uses the ZLIB memory to memory inflation library to compress an input memory buffer to an output file. Temporary buffer storage of the streams is minimized. The in and out file handles must already have been opened. This function will not close the file handles, and may leave the file pointers at an offset within the file. The out file offset should point to the place where the compression record starts within the output file. Parameters: inBuf  The input data memory buffer. out  The compressed output file handle. inSize  The number of bytes in the input buffer to compress. bufSize  The size in bytes to allocate for stream buffering. Returns: A ZLIB MSG code.

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