t/helpdesc.c

   1 /*
   2  * Read some text from standard input and format it with help_print_desc,
   3  * for testing.  Each pair of program arguments is converted to an int and
   4  * passed as the two integer arguments to help_print_desc.
   5  */
   6 #include "help.h"
   7 #include "tap.h"
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12 #include <limits.h>
  13 #include <errno.h>
  14
  15 static char buf[1000];
  16
  17 int arg_to_int(const char *s)
  18 {
  19         char *end;
  20         long val;
  21
  22         errno = 0;
  23         val = strtol(s, &end, 0);
  24         if (*end != 0)
  25                 tap_bail_out("%s: numeric argument expected", s);
  26         else if (val < INT_MIN || val > INT_MAX || errno == ERANGE)
  27                 tap_bail_out("%s: %s", s, strerror(ERANGE));
  28         else if (errno)
  29                 tap_bail_out("%s: %s", s, strerror(errno));
  30
  31         return val;
  32 }
  33
  34 int main(int argc, char **argv)
  35 {
  36         long a, b;
  37         size_t len;
  38         int i;
  39
  40         len = fread(buf, 1, sizeof buf - 1, stdin);
  41         if (len == sizeof buf - 1)
  42                 tap_bail_out("too much input text");
  43         if (ferror(stdin))
  44                 tap_bail_out("error reading from stdin: %s", strerror(errno));
  45
  46         for (i = 1; i < argc; i += 2) {
  47                 int indent = arg_to_int(argv[i]);
  48                 int sub = i+1 < argc ? arg_to_int(argv[i+1]) : 0;
  49
  50                 help_print_desc(NULL, buf, indent, sub);
  51         }
  52
  53         return 0;
  54 }