Check in the pristine copy of ICU 4.6...

icu46/source/tools/tzcode/scheck.c

+/*
+** This file is in the public domain, so clarified as of
+** 2006-07-17 by Arthur David Olson.
+*/
+
+#ifndef lint
+#ifndef NOID
+static char     elsieid[] = "@(#)scheck.c       8.19";
+#endif /* !defined lint */
+#endif /* !defined NOID */
+
+/*LINTLIBRARY*/
+
+#include "private.h"
+
+const char *
+scheck(string, format)
+const char * const      string;
+const char * const      format;
+{
+        register char *         fbuf;
+        register const char *   fp;
+        register char *         tp;
+        register int            c;
+        register const char *   result;
+        char                    dummy;
+
+        result = "";
+        if (string == NULL || format == NULL)
+                return result;
+        fbuf = imalloc((int) (2 * strlen(format) + 4));
+        if (fbuf == NULL)
+                return result;
+        fp = format;
+        tp = fbuf;
+        while ((*tp++ = c = *fp++) != '\0') {
+                if (c != '%')
+                        continue;
+                if (*fp == '%') {
+                        *tp++ = *fp++;
+                        continue;
+                }
+                *tp++ = '*';
+                if (*fp == '*')
+                        ++fp;
+                while (is_digit(*fp))
+                        *tp++ = *fp++;
+                if (*fp == 'l' || *fp == 'h')
+                        *tp++ = *fp++;
+                else if (*fp == '[')
+                        do *tp++ = *fp++;
+                                while (*fp != '\0' && *fp != ']');
+                if ((*tp++ = *fp++) == '\0')
+                        break;
+        }
+        *(tp - 1) = '%';
+        *tp++ = 'c';
+        *tp = '\0';
+        if (sscanf(string, fbuf, &dummy) != 1)
+                result = (char *) format;
+        ifree(fbuf);
+        return result;
+}