From 9ad8da8217db155d2b48fe7bed91da794a71d071 Mon Sep 17 00:00:00 2001
From: Jens Axboe <axboe@kernel.dk>
Date: Fri, 5 Apr 2013 14:44:03 +0200
Subject: [PATCH 1/1] Add strcasestr()

We'll need it for the next commit, if the platform does not
provide it.

Signed-off-by: Jens Axboe <axboe@kernel.dk>
---
 Makefile         |  3 +++
 configure        | 19 +++++++++++++++++++
 lib/strcasestr.c | 25 +++++++++++++++++++++++++
 lib/strcasestr.h | 13 +++++++++++++
 4 files changed, 60 insertions(+)
 create mode 100644 lib/strcasestr.c
 create mode 100644 lib/strcasestr.h

diff --git a/Makefile b/Makefile
index 27e82c66..15455052 100644
--- a/Makefile
+++ b/Makefile
@@ -72,6 +72,9 @@ endif
 ifndef CONFIG_STRSEP
   SOURCE += lib/strsep.c
 endif
+ifndef CONFIG_STRCASESTR
+  SOURCE += lib/strcasestr.c
+endif
 ifndef CONFIG_GETOPT_LONG_ONLY
   SOURCE += lib/getopt_long.c
 endif
diff --git a/configure b/configure
index a3c51fbd..09ea2761 100755
--- a/configure
+++ b/configure
@@ -843,6 +843,22 @@ if compile_prog "" "" "strsep"; then
 fi
 echo "strsep                        $strsep"
 
+##########################################
+# strcasestr() probe
+strcasestr="no"
+cat > $TMPC << EOF
+#include <string.h>
+int main(int argc, char **argv)
+{
+  strcasestr(NULL, NULL);
+  return 0;
+}
+EOF
+if compile_prog "" "" "strcasestr"; then
+  strcasestr="yes"
+fi
+echo "strcasestr                    $strcasestr"
+
 ##########################################
 # getopt_long_only() probe
 getopt_long_only="no"
@@ -1043,6 +1059,9 @@ fi
 if test "$strsep" = "yes" ; then
   output_sym "CONFIG_STRSEP"
 fi
+if test "$strcasestr" = "yes" ; then
+  output_sym "CONFIG_STRCASESTR"
+fi
 if test "$getopt_long_only" = "yes" ; then
   output_sym "CONFIG_GETOPT_LONG_ONLY"
 fi
diff --git a/lib/strcasestr.c b/lib/strcasestr.c
new file mode 100644
index 00000000..92cf24c6
--- /dev/null
+++ b/lib/strcasestr.c
@@ -0,0 +1,25 @@
+#include <ctype.h>
+#include <stddef.h>
+
+char *strcasestr(const char *s1, const char *s2)
+{
+	const char *s = s1;
+	const char *p = s2;
+
+	do {
+		if (!*p)
+			return (char *) s1;
+		if ((*p == *s) ||
+		    (tolower(*p) == tolower(*s))) {
+			++p;
+			++s;
+		} else {
+			p = s2;
+			if (!*s)
+				return NULL;
+			s = ++s1;
+		}
+	} while (1);
+
+	return *p ? NULL : (char *) s1;
+}
diff --git a/lib/strcasestr.h b/lib/strcasestr.h
new file mode 100644
index 00000000..43d61df4
--- /dev/null
+++ b/lib/strcasestr.h
@@ -0,0 +1,13 @@
+#ifdef CONFIG_STRCASESTR
+
+#include <string.h>
+
+#else
+
+#ifndef FIO_STRCASESTR_H
+#define FIO_STRCASESTR_H
+
+char *strcasestr(const char *haystack, const char *needle);
+
+#endif
+#endif
-- 
2.25.1