dump binary buffer in hex mode

最新推荐文章于 2024-10-15 11:38:19 发布

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本文介绍了一个用于打印内存中数据的十六进制转储函数snaRmHexDump的具体实现。该函数通过逐块读取内存并将其转换为十六进制形式输出，同时对不可打印字符进行替换，确保输出的可读性。此外，还提供了重复数据块的检测机制。

static void snaRmHexDump(int size, void *data)
{
    int j;
    int i;
    int   samesw = 0;
    int   count = 0;
    int len;
    unsigned char buf[16];
    unsigned char bufe[16];
    unsigned char hexbuf[16];
    unsigned char savebuf[16];
    unsigned char *databuf = (unsigned char *)data;

    memset(hexbuf, 0, 16);
    for(j=0; j < size; j += 16) {
   memcpy(savebuf, hexbuf, 16);
   memset(hexbuf, 0, 16);
   len = size - j;
   if(len > 16)
       len = 16;
   memcpy(hexbuf, &databuf[j], len);
   memcpy(buf, hexbuf, 16);
   memcpy(bufe, hexbuf, 16);
   for(i = 0; i < 16; i++)
       if(!isprint(buf[i]) || buf[i] == '\0')
           buf[i] = '.';
   snaConvert(16, bufe);
   for(i = 0; i < 16; i++)
       if(!isprint(bufe[i]) || bufe[i] == '\0')
           bufe[i] = '.';
   if(memcmp(hexbuf, savebuf, 16)) {
        fprintf(tracefile, "%5.5x |%2.2x%2.2x%2.2x%2.2x %2.2x%2.2x%2.2x%2.2x %2.2x%2.2x%2.2x%2.2x %2.2x%2.2x%2.2x%2.2x| |%16.16s|%16.16s|\n",
       count, hexbuf[0], hexbuf[1], hexbuf[2], hexbuf[3], hexbuf[4],
       hexbuf[5], hexbuf[6], hexbuf[7], hexbuf[8], hexbuf[9],
       hexbuf[10], hexbuf[11], hexbuf[12], hexbuf[13], hexbuf[14],
       hexbuf[15], buf, bufe);
        samesw = 0;
   }
   else
        if(samesw == 0) {
       samesw = 1;
       fprintf(tracefile, "       ******SAME*****\n");
        }
   count += 16;
    }
    return;
}