I found this mini-utility useful, and thought I would share it with the community.  I would have written in D, but any time I referenced "stdin" (for feof or fgets) I was getting compile errors, so it was quicker to just port it to C than figure out what I did wrong.

I think this would be a useful function to implement for the D standard library.

If anybody has any bugfixes, send 'em.



// the only purpose of this program is to read stdin, convert it
// to a D string that represents it, and output that to stdout.
// The output includes the quotes (single or double) around the
// string, but does not include any variable to save it nor
// any trailing semicolon.  You need to add those.
//
// So you might use this program like this:
//   {
//     echo "module file;"
//     echo "char[] file_str = \c"
//     str2d <file.txt
//     echo ";"
//   } >file.d

#include <stdio.h>

int main()
{
  putchar('\'');
  while(!feof(stdin))
  {
    char str[1024];
    int len;
    int s;

    fgets(str,sizeof(str),stdin);
    len = strlen(str);

    for(s=0; s<len; s++)
      switch(str[s])
      {
      case '\'':
        printf("' \\' '");
        break;

      case '\n':
        printf("' \\n\n'");
        break;

      case 0:
        printf("ERROR ERROR ERROR\n");
        return -1;

      default:
        putchar(str[s]);
      }
  }
  putchar('\'');

  return 0;
}

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Russ Lewis wrote:
> I found this mini-utility useful, and thought I would share it with the
> community.  I would have written in D, but any time I referenced "stdin"
> (for feof or fgets) I was getting compile errors, so it was quicker to
> just port it to C than figure out what I did wrong.

stdin/out/err are implemented using proprietary macros, so I need to put in a version for GNU C.

> I think this would be a useful function to implement for the D standard
> library.

Actually, fmt already has this using fmt ("%r", string).  For example:

    println ("%r", "hello, world") -> 'hello, world'
    println ("%r", 'foo' \n 'bar') -> "foo\nbar"