1 files changed, 120 insertions, 0 deletions
diff --git a/lib/strcasestr.c b/lib/strcasestr.c
new file mode 100755
index 0000000..8999c50
--- /dev/null
+++ b/lib/strcasestr.c
@@ -0,0 +1,120 @@
+/* Return the offset of one string within another.
+   Copyright (C) 1994, 1996, 1997 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the GNU C Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+/*
+ * My personal strstr() implementation that beats most other algorithms.
+ * Until someone tells me otherwise, I assume that this is the
+ * fastest implementation of strstr() in C.
+ * I deliberately chose not to comment it.  You should have at least
+ * as much fun trying to understand it, as I had to write it :-).
+ *
+ * Stephen R. van den Berg, berg@pool.informatik.rwth-aachen.de	*/
+/* added strcasestr support, davidm@lineo.com */
+
+#include "../include/sane/config.h"
+
+#ifndef HAVE_STRCASESTR 
+
+#if  defined HAVE_STRING_H
+# include <string.h>
+#endif
+
+typedef unsigned chartype;
+
+#include <ctype.h>
+#define VAL(x)	tolower(x)
+
+char * strcasestr ( const char *phaystack, const char *pneedle)
+{
+	register const unsigned char *haystack, *needle;
+	register chartype b, c;
+
+	haystack = (const unsigned char *) phaystack;
+	needle = (const unsigned char *) pneedle;
+
+	b = *needle;
+	if (b != '\0') {
+		haystack--;				/* possible ANSI violation */
+		do {
+			c = *++haystack;
+			if (c == '\0')
+				goto ret0;
+		}
+		while (VAL(c) != VAL(b));
+
+		c = *++needle;
+		if (c == '\0')
+			goto foundneedle;
+		++needle;
+		goto jin;
+
+		for (;;) {
+			register chartype a;
+			register const unsigned char *rhaystack, *rneedle;
+
+			do {
+				a = *++haystack;
+				if (a == '\0')
+					goto ret0;
+				if (VAL(a) == VAL(b))
+					break;
+				a = *++haystack;
+				if (a == '\0')
+					goto ret0;
+		  shloop:;}
+			while (VAL(a) != VAL(b));
+
+		  jin:a = *++haystack;
+			if (a == '\0')
+				goto ret0;
+
+			if (VAL(a) != VAL(c))
+				goto shloop;
+
+			rhaystack = haystack-- + 1;
+			rneedle = needle;
+			a = *rneedle;
+
+			if (VAL(*rhaystack) == VAL(a))
+				do {
+					if (a == '\0')
+						goto foundneedle;
+					++rhaystack;
+					a = *++needle;
+					if (VAL(*rhaystack) != VAL(a))
+						break;
+					if (a == '\0')
+						goto foundneedle;
+					++rhaystack;
+					a = *++needle;
+				}
+				while (VAL(*rhaystack) == VAL(a));
+
+			needle = rneedle;	/* took the register-poor approach */
+
+			if (a == '\0')
+				break;
+		}
+	}
+  foundneedle:
+	return (char *) haystack;
+  ret0:
+	return 0;
+}
+#endif