+// $Id: util-isnumber.hc 2255 2006-01-22 11:23:47Z ensc $ --*- c -*--
+
+// Copyright (C) 2006 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; version 2 of the License.
+//
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#define ENSC_DECL_UTIL_ISNUMBER(NAME,TYPE,FUNC) \
+ bool \
+ NAME(char const *str, TYPE *result, bool is_strict) \
+ { \
+ char * errptr; \
+ TYPE val; \
+ unsigned int fac = 1; \
+ \
+ errno = 0; \
+ val = FUNC(str, &errptr, 0); \
+ if (errno==ERANGE) \
+ return false; \
+ if (errptr!=str && !is_strict) { \
+ switch (*errptr) { \
+ case 'M' : fac *= 1024; /* fallthrough */ \
+ case 'K' : fac *= 1024; ++errptr; break; \
+ case 'm' : fac *= 1000; /* fallthrough */ \
+ case 'k' : fac *= 1000; ++errptr; break; \
+ default : break; \
+ } \
+ } \
+ if (!checkConstraints(val,fac)) \
+ return false; \
+ \
+ if (*errptr!='\0' || errptr==str) \
+ return false; \
+ else { \
+ if (result) *result = val*fac; \
+ return true; \
+ } \
+ }