1 files changed, 41 insertions, 0 deletions
diff --git a/gcc-4.7/libiberty/strstr.c b/gcc-4.7/libiberty/strstr.c
new file mode 100644
index 000000000..60902ea40
--- /dev/null
+++ b/gcc-4.7/libiberty/strstr.c
@@ -0,0 +1,41 @@
+/* Simple implementation of strstr for systems without it.
+   This function is in the public domain.  */
+
+/*
+
+@deftypefn Supplemental char* strstr (const char *@var{string}, const char *@var{sub})
+
+This function searches for the substring @var{sub} in the string
+@var{string}, not including the terminating null characters.  A pointer
+to the first occurrence of @var{sub} is returned, or @code{NULL} if the
+substring is absent.  If @var{sub} points to a string with zero
+length, the function returns @var{string}.
+
+@end deftypefn
+
+
+*/
+
+
+/* FIXME:  The above description is ANSI compiliant.  This routine has not
+   been validated to comply with it.  -fnf */
+
+#include <stddef.h>
+
+extern char *strchr (const char *, int);
+extern int strncmp (const void *, const void *, size_t);
+extern size_t strlen (const char *);
+
+char *
+strstr (const char *s1, const char *s2)
+{
+  const char *p = s1;
+  const size_t len = strlen (s2);
+
+  for (; (p = strchr (p, *s2)) != 0; p++)
+    {
+      if (strncmp (p, s2, len) == 0)
+	return (char *)p;
+    }
+  return (0);
+}