Non-printable characters in the Linux C string are converted to 16 binary

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If a C string contains both printable and non-printable characters, if you want to write the string to a file, and it is convenient to open the file view or print it in the console without garbled characters, you can convert the non-printable character in the string to 16 binary, here is a function to use:

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voidprinthex(unsigned char*src,intlen){    if(src==NULL)    {        return;    }    if(len>(1024*1024*3-1))    {              return;    }    charx[1024*1024*3]={0};    inti=0;    for(i=0;i<len;i++)    {        chartmp[10]={0};        if(isprint(src[i]))        {          snprintf(tmp,8,"%c",src[i]);          strcat(x,tmp);        }else        {          snprintf(tmp,8,"(%X)",src[i]);          strcat(x,tmp);        }          }    printf("%s",x);    return;}

With this function, we can easily print out the contents of the binary file and analyze it in the console, if it is 16 binary, it is non-printable character, if the printable character is displayed directly.

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Non-printable characters in the Linux C string are converted to 16 binary