将文件从Little endian转换为Big endian

本文介绍了将文件从Little endian转换为Big endian的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我需要在Linux 32位下将文件从Little Endian转换为Big Endian。我知道我可以自己做这个程序，但我想知道是否已经完成了任何可以完成工作的程序。

提前谢谢

Hi,

I need to convert a file from Little Endian to Big Endian under Linux 32 bit. I know that I can do the program myself, but I was wondering if there is any program already done that can do the job.

Thanks in advance

推荐答案

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char** argv)
{
  FILE* input = NULL;
  FILE* output = NULL;
  unsigned long size = 0;
  unsigned long itr = 0;
  unsigned char* buffer;


  if(argc != 3)
    return 0;
  input = fopen(argv[1],"rb");
  output = fopen(argv[2],"wb");

  if(!input || !output)
    fprintf(stderr,"could not open file");
  fseek(input,0,SEEK_END);
  size = ftell(input);
  fseek(input,0,SEEK_SET);

  buffer = (unsigned char*)malloc(size);

  fread(buffer,1,size,input);
  fclose(input);
  for(itr = size;itr>0;itr--)
  {
    fwrite(&buffer[itr-1],1,1,output);
  }
  fclose(output);
return 0;
}

编译和使用如下：

./application inputfile outputfile

compile and use like this:

./application inputfile outputfile

#include <stdio.h>
#include <stdlib.h>

int main(int argc, char** argv)
{
    FILE* input = NULL;
    FILE* output = NULL;
    unsigned long size = 0;
    unsigned long itr = 0;
    unsigned char* buffer;

    if(argc != 3)
    return 0;
    input = fopen(argv[1],"rb");
    output = fopen(argv[2],"wb");

    if(!input || !output)
        fprintf(stderr,"could not open file");
    fseek(input,0,SEEK_END);
    size = ftell(input);
    fseek(input,0,SEEK_SET);

    buffer = (unsigned char*)malloc(size);

    fread(buffer,1,size,input);
    fclose(input);
    for(itr = 0;itr<size;itr=itr+4)
    {
        fwrite(&buffer[itr + 3],1,1,output);
        fwrite(&buffer[itr + 2],1,1,output);
        fwrite(&buffer[itr + 1],1,1,output);
        fwrite(&buffer[itr + 0],1,1,output);
    }
    fclose(output);
    return 0;
}

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inputFile