commands/zoneinfo/scheck.c

   1 #
   2
   3 /*LINTLIBRARY*/
   4
   5 #include <string.h>
   6 #include <stdlib.h>
   7
   8 #include "stdio.h"
   9
  10 #ifndef lint
  11 #ifndef NOID
  12 static char     sccsid[] = "@(#)scheck.c        7.15";
  13 #endif /* !NOID */
  14 #endif /* !lint */
  15
  16 #include "ctype.h"
  17 #include "private.h"
  18
  19 const char *
  20 scheck(string, format)
  21 const char *    string;
  22 const char *    format;
  23 {
  24         register char * fbuf;
  25         register char * fp;
  26         register char * tp;
  27         register int    c;
  28         register char * result;
  29         char            dummy;
  30
  31         result = "";
  32         if (string == NULL || format == NULL)
  33                 return result;
  34         fbuf = imalloc(2 * strlen(format) + 4);
  35         if (fbuf == NULL)
  36                 return result;
  37         fp = (char *) format;
  38         tp = (char *) fbuf;
  39         while ((*tp++ = c = *fp++) != '\0') {
  40                 if (c != '%')
  41                         continue;
  42                 if (*fp == '%') {
  43                         *tp++ = *fp++;
  44                         continue;
  45                 }
  46                 *tp++ = '*';
  47                 if (*fp == '*')
  48                         ++fp;
  49                 while (isascii(*fp) && isdigit(*fp))
  50                         *tp++ = *fp++;
  51                 if (*fp == 'l' || *fp == 'h')
  52                         *tp++ = *fp++;
  53                 else if (*fp == '[')
  54                         do *tp++ = *fp++;
  55                                 while (*fp != '\0' && *fp != ']');
  56                 if ((*tp++ = *fp++) == '\0')
  57                         break;
  58         }
  59         *(tp - 1) = '%';
  60         *tp++ = 'c';
  61         *tp = '\0';
  62         if (sscanf(string, fbuf, &dummy) != 1)
  63                 result = (char *) format;
  64         free(fbuf);
  65         return result;
  66 }