From a93b6c0a653a4667d3e95b0bc6c4cb03bf39d4a2 Mon Sep 17 00:00:00 2001
From: Xinchen Hui <laruence@gmail.com>
Date: Mon, 9 Mar 2020 15:55:22 +0800
Subject: [PATCH] Use _SSE2_ instrs to to sanitize name

---
 tests/issue297.phpt | 11 ++++++++---
 yaf_loader.c        | 30 +++++++++++++++++++++++++++++-
 2 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/tests/issue297.phpt b/tests/issue297.phpt
index a3437a5c..003358f5 100644
--- a/tests/issue297.phpt
+++ b/tests/issue297.phpt
@@ -10,15 +10,20 @@ yaf.lowcase_path=0
 yaf.throw_exception=0
 yaf.catch_exception=1
 yaf.use_namespace=1
+yaf.use_spl_autoload=0
 --FILE--
 <?php 
 $loader = Yaf\Loader::getInstance(__DIR__, __DIR__);
-var_dump(new \Test\Test);
+var_dump($loader->autoload("Test\Test"));
+var_dump(new \Test\Test\Test\Test\Test\Test\T\Test\Test); //for __SSE2__
 ?>
 --EXPECTF--
-Warning: Yaf\Loader::autoload(): Failed opening script %s/Test/Test.php: No such file or directory in %sissue297.php on line %d
+Warning: Yaf\Loader::autoload(): Failed opening script %s%cTest/Test.php: No such file or directory in %sissue297.php on line %d
+bool(true)
 
-Fatal error: Uncaught Error: Class 'Test\Test' not found in %sissue297.php:%d
+Warning: Yaf\Loader::autoload(): Failed opening script %s/Test/Test/Test/Test/Test/Test/T/Test/Test.php: No such file or directory in %sissue297.php on line %d
+
+Fatal error: Uncaught Error: Class 'Test\Test\Test\Test\Test\Test\T\Test\Test' not found in %sissue297.php:%d
 Stack trace:
 #0 {main}
   thrown in %sissue297.php on line %d
diff --git a/yaf_loader.c b/yaf_loader.c
index 402fdc48..f021a1b7 100644
--- a/yaf_loader.c
+++ b/yaf_loader.c
@@ -21,6 +21,10 @@
 #include "php.h"
 #include "zend_smart_str.h" /* for smart_str */
 
+#ifdef __SSE2__
+#include <emmintrin.h>
+#endif
+
 #include "php_yaf.h"
 #include "yaf_application.h"
 #include "yaf_namespace.h"
@@ -221,7 +225,31 @@ static inline char* yaf_loader_sanitize_name(char *name, size_t len) /* {{{ */ {
 		/* replace all '\' to '_' */
 		sanitized_name = estrndup(name, len);
 		pos = sanitized_name + (pos - name);
-		while ((*pos = '_', pos = memchr(pos, '\\', len - (pos - sanitized_name))));
+#ifdef __SSE2__
+		do {
+			const __m128i slash = _mm_set1_epi8('\\');
+			const __m128i delta = _mm_set1_epi8('_' - '\\');
+			len -= (pos - sanitized_name);
+			while (len >= 16) {
+				__m128i op = _mm_loadu_si128((__m128i *)pos);
+				__m128i eq = _mm_cmpeq_epi8(op, slash);
+				if (_mm_movemask_epi8(eq)) {
+					eq = _mm_and_si128(eq, delta);
+					op = _mm_add_epi8(op, eq);
+					_mm_storeu_si128((__m128i*)pos, op);
+				}
+				len -= 16;
+				pos += 16;
+			}
+		} while (0);
+
+		name = pos;
+		while ((pos = memchr(pos, '\\', len - (pos - name)))) {
+			*pos++ = '_';
+		}
+#else
+		while ((*pos++ = '_', pos = memchr(pos, '\\', len - (pos - sanitized_name))));
+#endif
 	}
 
 	return sanitized_name;