98 lines
2.3 KiB
C
Executable File
98 lines
2.3 KiB
C
Executable File
#include <stdio.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <string.h>
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#include <malloc.h>
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#include <stdlib.h>
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void print_binary(FILE *fp, uint32_t n)
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{
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uint8_t arr[32] = {0};
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int len = 0;
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for(len = 0; len < 32; len++){
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arr[len] = (n&1)+'0';
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n = n>>1;
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}
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len--;
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while (len >= 0 ){
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fprintf(fp,"%c", arr[len]);
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len--;
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}
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fprintf(fp,"\n");
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}
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int main( int argc, char *argv[] )
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{
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uint8_t buf[128];
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FILE *fin = NULL, *fout = NULL;
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int i = 0;
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uint8_t val;
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off_t filesize, offset;
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size_t st = 0;
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uint32_t tmp = 0;
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if( ( fin = fopen( argv[1], "rb" ) ) == NULL ){
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printf("fopen(%s,r) failed\n", argv[1] );
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goto exit;
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}
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if( ( fout = fopen( argv[2], "w+" ) ) == NULL ){
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printf("fopen(%s,w+) failed\n", argv[2] );
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goto exit;
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}
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if( argc > 3){
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filesize = atoi(argv[3]);
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} else{
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if( ( filesize = lseek( fileno( fin ), 0, SEEK_END ) ) < 0 ){
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perror( "lseek" );
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goto exit;
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}
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}
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if( fseek( fin, 0, SEEK_SET ) < 0 ){
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printf( "fseek(0,SEEK_SET) failed\n" );
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goto exit;
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}
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memset(buf, 0x0,128);
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for( offset = 0; offset < filesize; offset += 1 ){
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st = fread( buf, 1, 4, fin );
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if ( st == 0) {
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break;
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}
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#if 0
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for(i = 0; i < 4; i++){
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val = buf[3-i];
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printf("%02x\n", val);
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printf("%02x\n", val);
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fprintf(fout, "%02x\n", val);
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}
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#else
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if ( st == 4) {
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tmp = (uint32_t)(((uint32_t)buf[3] <<24)|((uint32_t)buf[2]<<16) |(uint32_t)(buf[1]<<8)|(uint32_t)buf[0]);
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} else if (st == 3) {
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tmp = (uint32_t)(((uint32_t)buf[2]<<16) |(uint32_t)(buf[1]<<8)|(uint32_t)buf[0]);
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} else if (st == 2) {
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tmp = (uint32_t)((uint32_t)(buf[1]<<8)|(uint32_t)buf[0]);
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} else if (st == 1) {
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tmp = (uint32_t)((uint32_t)buf[0]);
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}
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//printf("%02x %02x %02x %02x\n", buf[3], buf[2], buf[1], buf[0]);
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//printf("%08x\n", tmp);
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fprintf(fout, "%08x\n", tmp);
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#endif
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}
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exit:
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if(fin){
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fclose(fin);
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}
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if(fout){
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fclose(fout);
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}
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}
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