timezone/scheck.c

   1 #ifndef lint
   2 #ifndef NOID
   3 static char     elsieid[] = "@(#)scheck.c       8.16";
   4 #endif /* !defined lint */
   5 #endif /* !defined NOID */
   6
   7 /*LINTLIBRARY*/
   8
   9 #include "private.h"
  10
  11 char *
  12 scheck(string, format)
  13 const char * const      string;
  14 char * const            format;
  15 {
  16         register char *         fbuf;
  17         register const char *   fp;
  18         register char *         tp;
  19         register int            c;
  20         register char *         result;
  21         char                    dummy;
  22         static char             nada;
  23
  24         result = &nada;
  25         if (string == NULL || format == NULL)
  26                 return result;
  27         fbuf = imalloc((int) (2 * strlen(format) + 4));
  28         if (fbuf == NULL)
  29                 return result;
  30         fp = format;
  31         tp = fbuf;
  32         while ((*tp++ = c = *fp++) != '\0') {
  33                 if (c != '%')
  34                         continue;
  35                 if (*fp == '%') {
  36                         *tp++ = *fp++;
  37                         continue;
  38                 }
  39                 *tp++ = '*';
  40                 if (*fp == '*')
  41                         ++fp;
  42                 while (is_digit(*fp))
  43                         *tp++ = *fp++;
  44                 if (*fp == 'l' || *fp == 'h')
  45                         *tp++ = *fp++;
  46                 else if (*fp == '[')
  47                         do *tp++ = *fp++;
  48                                 while (*fp != '\0' && *fp != ']');
  49                 if ((*tp++ = *fp++) == '\0')
  50                         break;
  51         }
  52         *(tp - 1) = '%';
  53         *tp++ = 'c';
  54         *tp = '\0';
  55         if (sscanf(string, fbuf, &dummy) != 1)
  56                 result = (char *) format;
  57         ifree(fbuf);
  58         return result;
  59 }