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   1 #include "config.h"
   2 #include <stdio.h>
   3 #include <string.h>
   4
   5 /**
   6  * tal/str - string helper routines which use tal
   7  *
   8  * This is a grab bag of functions for string operations, designed to enhance
   9  * the standard string.h; these are separated from the non-tal-needing
  10  * string utilities in "str.h".  Each string created by this library
  11  * will have tal_count() equal to strlen() + 1 (assuming you didn't create
  12  * a string containing a NUL, such as using tal_fmt("%c", 0)).
  13  *
  14  * Example:
  15  *      #include <ccan/tal/str/str.h>
  16  *      #include <ccan/tal/grab_file/grab_file.h>
  17  *      #include <err.h>
  18  *
  19  *      // Dumb demo program to double-linespace a file.
  20  *      int main(int argc, char *argv[])
  21  *      {
  22  *              char *textfile;
  23  *              char **lines;
  24  *
  25  *              if (argc > 2)
  26  *                      errx(1, "Takes 0 or 1 arguments");
  27  *              // Grab lines in file.
  28  *              textfile = grab_file(NULL, argv[1]);
  29  *              if (!textfile)
  30  *                      err(1, "Failed reading %s", argv[1]);
  31  *              lines = tal_strsplit(textfile, textfile, "\n", STR_EMPTY_OK);
  32  *
  33  *              // Join them back together with two linefeeds.
  34  *              printf("%s", tal_strjoin(textfile, lines, "\n\n", STR_TRAIL));
  35  *
  36  *              // Free everything, just because we can.
  37  *              tal_free(textfile);
  38  *              return 0;
  39  *      }
  40  *
  41  * License: BSD-MIT
  42  * Author: Rusty Russell <rusty@rustcorp.com.au>
  43  */
  44 int main(int argc, char *argv[])
  45 {
  46         if (argc != 2)
  47                 return 1;
  48
  49         if (strcmp(argv[1], "depends") == 0) {
  50                 printf("ccan/str\n");
  51 #ifdef TAL_USE_TALLOC
  52                 printf("ccan/tal/talloc\n");
  53 #else
  54                 printf("ccan/tal\n");
  55 #endif
  56                 printf("ccan/take\n");
  57                 return 0;
  58         }
  59
  60         return 1;
  61 }