time/scheck.c

   1 #ifndef lint
   2 #ifndef NOID
   3 static char     elsieid[] = "@(#)scheck.c       8.10";
   4 #endif /* !defined lint */
   5 #endif /* !defined NOID */
   6
   7 /*LINTLIBRARY*/
   8
   9 #include "private.h"
  10
  11 extern char *   imalloc P((int n));
  12 extern void     ifree P((char * p));
  13
  14 char *
  15 scheck(string, format)
  16 const char * const      string;
  17 const char * const      format;
  18 {
  19         register char *         fbuf;
  20         register const char *   fp;
  21         register char *         tp;
  22         register int            c;
  23         register char *         result;
  24         char                    dummy;
  25
  26         result = "";
  27         if (string == NULL || format == NULL)
  28                 return result;
  29         fbuf = imalloc(2 * strlen(format) + 4);
  30         if (fbuf == NULL)
  31                 return result;
  32         fp = format;
  33         tp = fbuf;
  34         while ((*tp++ = c = *fp++) != '\0') {
  35                 if (c != '%')
  36                         continue;
  37                 if (*fp == '%') {
  38                         *tp++ = *fp++;
  39                         continue;
  40                 }
  41                 *tp++ = '*';
  42                 if (*fp == '*')
  43                         ++fp;
  44                 while (isascii(*fp) && isdigit(*fp))
  45                         *tp++ = *fp++;
  46                 if (*fp == 'l' || *fp == 'h')
  47                         *tp++ = *fp++;
  48                 else if (*fp == '[')
  49                         do *tp++ = *fp++;
  50                                 while (*fp != '\0' && *fp != ']');
  51                 if ((*tp++ = *fp++) == '\0')
  52                         break;
  53         }
  54         *(tp - 1) = '%';
  55         *tp++ = 'c';
  56         *tp = '\0';
  57         if (sscanf(string, fbuf, &dummy) != 1)
  58                 result = (char *) format;
  59         ifree(fbuf);
  60         return result;
  61 }