Added smart_string to avoid string duplicated

for now, if we want result a char * use smart_string, if zend_string
 use smart_str

1 files changed, 196 insertions, 0 deletions

diff --git a/ext/standard/php_smart_string.h b/ext/standard/php_smart_string.h
new file mode 100644
index 0000000000..1613e4898b
--- /dev/null
+++ b/ext/standard/php_smart_string.h
@@ -0,0 +1,196 @@
+/*
+   +----------------------------------------------------------------------+
+   | PHP Version 5                                                        |
+   +----------------------------------------------------------------------+
+   | Copyright (c) 1997-2014 The PHP Group                                |
+   +----------------------------------------------------------------------+
+   | This source file is subject to version 3.01 of the PHP license,      |
+   | that is bundled with this package in the file LICENSE, and is        |
+   | available through the world-wide-web at the following url:           |
+   | http://www.php.net/license/3_01.txt                                  |
+   | If you did not receive a copy of the PHP license and are unable to   |
+   | obtain it through the world-wide-web, please send a note to          |
+   | license@php.net so we can mail you a copy immediately.               |
+   +----------------------------------------------------------------------+
+   | Author: Sascha Schumann <sascha@schumann.cx>                         |
+   |         Xinchen Hui <laruence@php.net>                               |
+   +----------------------------------------------------------------------+
+ */
+
+/* $Id$ */
+
+#ifndef PHP_SMART_STRING_H
+#define PHP_SMART_STRING_H
+
+#include "php_smart_string_public.h"
+
+#include <stdlib.h>
+#ifndef SMART_STR_USE_REALLOC
+#include <zend.h>
+#endif
+
+#define smart_string_0(x) do {										\
+	if ((x)->c) {													\
+		(x)->c[(x)->len] = '\0';									\
+	}																\
+} while (0)
+
+#ifndef SMART_STRING_PREALLOC
+#define SMART_STRING_PREALLOC 128
+#endif
+
+#ifndef SMART_STRING_START_SIZE
+#define SMART_STRING_START_SIZE 78
+#endif
+
+#ifdef SMART_STRING_USE_REALLOC
+#define SMART_STRING_REALLOC(a,b,c) realloc((a),(b))
+#else
+#define SMART_STRING_REALLOC(a,b,c) perealloc((a),(b),(c))
+#endif
+
+#define SMART_STRING_DO_REALLOC(d, what) \
+	(d)->c = SMART_STRING_REALLOC((d)->c, (d)->a + 1, (what))
+
+#define smart_string_alloc4(d, n, what, newlen) do {					\
+	if (!(d)->c) {													\
+		(d)->len = 0;												\
+		newlen = (n);												\
+		(d)->a = newlen < SMART_STRING_START_SIZE 						\
+				? SMART_STRING_START_SIZE 								\
+				: newlen + SMART_STRING_PREALLOC;						\
+		SMART_STRING_DO_REALLOC(d, what);								\
+	} else {														\
+		newlen = (d)->len + (n);									\
+		if (newlen >= (d)->a) {										\
+			(d)->a = newlen + SMART_STRING_PREALLOC;					\
+			SMART_STRING_DO_REALLOC(d, what);							\
+		}															\
+	}																\
+} while (0)
+
+#define smart_string_alloc(d, n, what) \
+	smart_string_alloc4((d), (n), (what), newlen)
+
+/* wrapper */
+
+#define smart_string_appends_ex(dest, src, what) \
+	smart_string_appendl_ex((dest), (src), strlen(src), (what))
+#define smart_string_appends(dest, src) \
+	smart_string_appendl((dest), (src), strlen(src))
+
+#define smart_string_appendc(dest, c) \
+	smart_string_appendc_ex((dest), (c), 0)
+#define smart_string_free(s) \
+	smart_string_free_ex((s), 0)
+#define smart_string_appendl(dest, src, len) \
+	smart_string_appendl_ex((dest), (src), (len), 0)
+#define smart_string_append(dest, src) \
+	smart_string_append_ex((dest), (src), 0)
+#define smart_string_append_long(dest, val) \
+	smart_string_append_long_ex((dest), (val), 0)
+#define smart_string_append_off_t(dest, val) \
+	smart_string_append_off_t_ex((dest), (val), 0)
+#define smart_string_append_unsigned(dest, val) \
+	smart_string_append_unsigned_ex((dest), (val), 0)
+
+#define smart_string_appendc_ex(dest, ch, what) do {					\
+	register size_t __nl;											\
+	smart_string_alloc4((dest), 1, (what), __nl);						\
+	(dest)->len = __nl;												\
+	((unsigned char *) (dest)->c)[(dest)->len - 1] = (ch);			\
+} while (0)
+
+#define smart_string_free_ex(s, what) do {								\
+	smart_string *__s = (smart_string *) (s);								\
+	if (__s->c) {													\
+		pefree(__s->c, what);										\
+		__s->c = NULL;												\
+	}																\
+	__s->a = __s->len = 0;											\
+} while (0)
+
+#define smart_string_appendl_ex(dest, src, nlen, what) do {			\
+	register size_t __nl;											\
+	smart_string *__dest = (smart_string *) (dest);						\
+																	\
+	smart_string_alloc4(__dest, (nlen), (what), __nl);					\
+	memcpy(__dest->c + __dest->len, (src), (nlen));					\
+	__dest->len = __nl;												\
+} while (0)
+
+/* input: buf points to the END of the buffer */
+#define smart_string_print_unsigned4(buf, num, vartype, result) do {	\
+	char *__p = (buf);												\
+	vartype __num = (num);											\
+	*__p = '\0';													\
+	do {															\
+		*--__p = (char) (__num % 10) + '0';							\
+		__num /= 10;												\
+	} while (__num > 0);											\
+	result = __p;													\
+} while (0)
+
+/* buf points to the END of the buffer */
+#define smart_string_print_long4(buf, num, vartype, result) do {	\
+	if (num < 0) {													\
+		/* this might cause problems when dealing with LONG_MIN		\
+		   and machines which don't support long long.  Works		\
+		   flawlessly on 32bit x86 */								\
+		smart_string_print_unsigned4((buf), -(num), vartype, (result));	\
+		*--(result) = '-';											\
+	} else {														\
+		smart_string_print_unsigned4((buf), (num), vartype, (result));	\
+	}																\
+} while (0)
+
+/*
+ * these could be replaced using a braced-group inside an expression
+ * for GCC compatible compilers, e.g.
+ *
+ * #define f(..) ({char *r;..;__r;})
+ */  
+ 
+static inline char *smart_string_print_long(char *buf, long num) {
+	char *r; 
+	smart_string_print_long4(buf, num, unsigned long, r); 
+	return r;
+}
+
+static inline char *smart_string_print_unsigned(char *buf, long num) {
+	char *r; 
+	smart_string_print_unsigned4(buf, num, unsigned long, r); 
+	return r;
+}
+
+#define smart_string_append_generic_ex(dest, num, type, vartype, func) do {	\
+	char __b[32];															\
+	char *__t;																\
+   	smart_string_print##func##4 (__b + sizeof(__b) - 1, (num), vartype, __t);	\
+	smart_string_appendl_ex((dest), __t, __b + sizeof(__b) - 1 - __t, (type));	\
+} while (0)
+	
+#define smart_string_append_unsigned_ex(dest, num, type) \
+	smart_string_append_generic_ex((dest), (num), (type), unsigned long, _unsigned)
+
+#define smart_string_append_long_ex(dest, num, type) \
+	smart_string_append_generic_ex((dest), (num), (type), unsigned long, _long)
+
+#define smart_string_append_off_t_ex(dest, num, type) \
+	smart_string_append_generic_ex((dest), (num), (type), off_t, _long)
+
+#define smart_string_append_ex(dest, src, what) \
+	smart_string_appendl_ex((dest), ((smart_string *)(src))->c, \
+		((smart_string *)(src))->len, (what));
+
+
+#define smart_string_setl(dest, src, nlen) do {						\
+	(dest)->len = (nlen);											\
+	(dest)->a = (nlen) + 1;											\
+	(dest)->c = (char *) (src);										\
+} while (0)
+
+#define smart_string_sets(dest, src) \
+	smart_string_setl((dest), (src), strlen(src));
+
+#endif