stdlib.h: Add implementation of strstr

Signed-off-by: Matt Fleming <matt.fleming@linux.intel.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/stdlib.h b/stdlib.h
index bd0134d..a4ef517 100644
--- a/stdlib.h
+++ b/stdlib.h
@@ -34,5 +34,25 @@ static inline int strlen(char *str)
 	return len;
 }
 
+static inline char *strstr(char *haystack, char *needle)
+{
+	char *p;
+	char *word = NULL;
+	int len = strlen(needle);
+
+	if (!len)
+		return NULL;
+
+	p = haystack;
+	while (*p) {
+		word = p;
+		if (!strncmpa((CHAR8 *)p, (CHAR8 *)needle, len))
+			break;
+		p++;
+		word = NULL;
+	}
+
+	return word;
+}
 
 #endif /* __STDLIB_H__ */