147 lines
4.1 KiB
C
147 lines
4.1 KiB
C
/*
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* $Id: byte_manager.c 44 2011-02-15 12:32:29Z kaori $
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*
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* Copyright (c) 2002-2011, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium
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* Copyright (c) 2002-2011, Professor Benoit Macq
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* Copyright (c) 2010-2011, Kaori Hagihara
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS'
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/types.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include "byte_manager.h"
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#ifdef SERVER
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#include "fcgi_stdio.h"
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#define logstream FCGI_stdout
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#else
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#define FCGI_stdout stdout
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#define FCGI_stderr stderr
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#define logstream stderr
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#endif //SERVER
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Byte_t * fetch_bytes( int fd, long offset, int size)
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{
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Byte_t *data;
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if( lseek( fd, offset, SEEK_SET)==-1){
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fprintf( FCGI_stdout, "Reason: Target broken (fseek error)\r\n");
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fprintf( FCGI_stderr, "Error: error in fetch_bytes( %d, %ld, %d)\n", fd, offset, size);
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return NULL;
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}
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data = (Byte_t *)malloc( size);
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if( read( fd, data, size) != size){
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free( data);
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fprintf( FCGI_stdout, "Reason: Target broken (read error)\r\n");
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fprintf( FCGI_stderr, "Error: error in fetch_bytes( %d, %ld, %d)\n", fd, offset, size);
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return NULL;
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}
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return data;
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}
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Byte_t fetch_1byte( int fd, long offset)
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{
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Byte_t code;
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if( lseek( fd, offset, SEEK_SET)==-1){
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fprintf( FCGI_stdout, "Reason: Target broken (seek error)\r\n");
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fprintf( FCGI_stderr, "Error: error in fetch_1byte( %d, %ld)\n", fd, offset);
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return 0;
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}
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if( read( fd, &code, 1) != 1){
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fprintf( FCGI_stdout, "Reason: Target broken (read error)\r\n");
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fprintf( FCGI_stderr, "Error: error in fetch_bytes( %d, %ld)\n", fd, offset);
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return 0;
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}
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return code;
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}
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Byte2_t fetch_2bytebigendian( int fd, long offset)
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{
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Byte_t *data;
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Byte2_t code;
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if(!(data = fetch_bytes( fd, offset, 2))){
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fprintf( FCGI_stderr, "Error: error in fetch_2bytebigendian( %d, %ld)\n", fd, offset);
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return 0;
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}
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code = big2(data);
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free( data);
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return code;
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}
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Byte4_t fetch_4bytebigendian( int fd, long offset)
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{
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Byte_t *data;
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Byte4_t code;
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if(!(data = fetch_bytes( fd, offset, 4))){
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fprintf( FCGI_stderr, "Error: error in fetch_4bytebigendian( %d, %ld)\n", fd, offset);
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return 0;
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}
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code = big4(data);
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free( data);
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return code;
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}
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Byte8_t fetch_8bytebigendian( int fd, long offset)
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{
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Byte_t *data;
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Byte8_t code;
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if(!(data = fetch_bytes( fd, offset, 8))){
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fprintf( FCGI_stderr, "Error: error in fetch_8bytebigendian( %d, %ld)\n", fd, offset);
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return 0;
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}
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code = big8(data);
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free( data);
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return code;
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}
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Byte2_t big2( Byte_t *buf)
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{
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return (((Byte2_t) buf[0]) << 8) + ((Byte2_t) buf[1]);
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}
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Byte4_t big4( Byte_t *buf)
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{
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return (((((((Byte4_t) buf[0]) << 8) + ((Byte4_t) buf[1])) << 8)
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+ ((Byte4_t) buf[2])) << 8) + ((Byte4_t) buf[3]);
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}
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Byte8_t big8( Byte_t *buf)
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{
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return (((Byte8_t) big4 (buf)) << 32)
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+ ((Byte8_t) big4 (buf + 4));
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}
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