1 files changed, 110 insertions, 0 deletions
diff --git a/nsprpub/lib/libc/src/strstr.c b/nsprpub/lib/libc/src/strstr.c
new file mode 100644
index 0000000000..dd27a23ee7
--- /dev/null
+++ b/nsprpub/lib/libc/src/strstr.c
@@ -0,0 +1,110 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "plstr.h"
+#include <string.h>
+
+PR_IMPLEMENT(char *)
+PL_strstr(const char *big, const char *little)
+{
+    if( ((const char *)0 == big) || ((const char *)0 == little) ) {
+        return (char *)0;
+    }
+    if( ((char)0 == *big) || ((char)0 == *little) ) {
+        return (char *)0;
+    }
+
+    return strstr(big, little);
+}
+
+PR_IMPLEMENT(char *)
+PL_strrstr(const char *big, const char *little)
+{
+    const char *p;
+    size_t ll;
+    size_t bl;
+
+    if( ((const char *)0 == big) || ((const char *)0 == little) ) {
+        return (char *)0;
+    }
+    if( ((char)0 == *big) || ((char)0 == *little) ) {
+        return (char *)0;
+    }
+
+    ll = strlen(little);
+    bl = strlen(big);
+    if( bl < ll ) {
+        return (char *)0;
+    }
+    p = &big[ bl - ll ];
+
+    for( ; p >= big; p-- )
+        if( *little == *p )
+            if( 0 == strncmp(p, little, ll) ) {
+                return (char *)p;
+            }
+
+    return (char *)0;
+}
+
+PR_IMPLEMENT(char *)
+PL_strnstr(const char *big, const char *little, PRUint32 max)
+{
+    size_t ll;
+
+    if( ((const char *)0 == big) || ((const char *)0 == little) ) {
+        return (char *)0;
+    }
+    if( ((char)0 == *big) || ((char)0 == *little) ) {
+        return (char *)0;
+    }
+
+    ll = strlen(little);
+    if( ll > (size_t)max ) {
+        return (char *)0;
+    }
+    max -= (PRUint32)ll;
+    max++;
+
+    for( ; max && *big; big++, max-- )
+        if( *little == *big )
+            if( 0 == strncmp(big, little, ll) ) {
+                return (char *)big;
+            }
+
+    return (char *)0;
+}
+
+PR_IMPLEMENT(char *)
+PL_strnrstr(const char *big, const char *little, PRUint32 max)
+{
+    const char *p;
+    size_t ll;
+
+    if( ((const char *)0 == big) || ((const char *)0 == little) ) {
+        return (char *)0;
+    }
+    if( ((char)0 == *big) || ((char)0 == *little) ) {
+        return (char *)0;
+    }
+
+    ll = strlen(little);
+
+    for( p = big; max && *p; p++, max-- )
+        ;
+
+    p -= ll;
+    if( p < big ) {
+        return (char *)0;
+    }
+
+    for( ; p >= big; p-- )
+        if( *little == *p )
+            if( 0 == strncmp(p, little, ll) ) {
+                return (char *)p;
+            }
+
+    return (char *)0;
+}