STR 2771 fix: introduce a new ascii strcasecmp that does not rely on locale sensitive toupper tolower.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@9368 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

1 files changed, 15 insertions, 0 deletions

diff --git a/src/flstring.c b/src/flstring.c
index abfdcefd3..fcab1a765 100644
--- a/src/flstring.c
+++ b/src/flstring.c
@@ -90,6 +90,21 @@ fl_strlcpy(char       *dst,	/* O - Destination string */
   return (srclen);
 }
 
+/**
+* locale independent ascii oriented case cmp
+* returns 0 if string successfully compare, non zero otherwise
+*/
+int fl_ascii_strcasecmp(const char *s, const char *t) {
+	if (!s || !t) return (s!=t);
+	if (strlen(s) != strlen(t)) return -1;
+	for(;*s; s++,t++) {
+		if ( *s != *t) {
+			if (*s<*t && (*s+0x20)!=*t ) return -1;
+			if (*s>*t && *s!=(*t+0x20) ) return +1;
+		}
+	}
+	return 0;
+}
 
 /*
  * End of "$Id$".