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|
/*
+----------------------------------------------------------------------+
| PHP Version 7 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2017 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: Dmitry Stogov <dmitry@zend.com> |
+----------------------------------------------------------------------+
*/
#include <zend.h>
#include "zend_smart_str.h"
#include "zend_smart_string.h"
#define SMART_STR_OVERHEAD (ZEND_MM_OVERHEAD + _ZSTR_HEADER_SIZE + 1)
#define SMART_STR_START_SIZE 256
#define SMART_STR_START_LEN (SMART_STR_START_SIZE - SMART_STR_OVERHEAD)
#define SMART_STR_PAGE 4096
#define SMART_STR_NEW_LEN(len) \
(ZEND_MM_ALIGNED_SIZE_EX(len + SMART_STR_OVERHEAD, SMART_STR_PAGE) - SMART_STR_OVERHEAD)
ZEND_API void ZEND_FASTCALL smart_str_erealloc(smart_str *str, size_t len)
{
if (UNEXPECTED(!str->s)) {
str->a = len <= SMART_STR_START_LEN
? SMART_STR_START_LEN
: SMART_STR_NEW_LEN(len);
str->s = zend_string_alloc(str->a, 0);
ZSTR_LEN(str->s) = 0;
} else {
str->a = SMART_STR_NEW_LEN(len);
str->s = (zend_string *) erealloc2(str->s, str->a + _ZSTR_HEADER_SIZE + 1, _ZSTR_HEADER_SIZE + ZSTR_LEN(str->s));
}
}
ZEND_API void ZEND_FASTCALL smart_str_realloc(smart_str *str, size_t len)
{
if (UNEXPECTED(!str->s)) {
str->a = len <= SMART_STR_START_SIZE
? SMART_STR_START_LEN
: SMART_STR_NEW_LEN(len);
str->s = zend_string_alloc(str->a, 1);
ZSTR_LEN(str->s) = 0;
} else {
str->a = SMART_STR_NEW_LEN(len);
str->s = (zend_string *) perealloc(str->s, str->a + _ZSTR_HEADER_SIZE + 1, 1);
}
}
/* Windows uses VK_ESCAPE instead of \e */
#ifndef VK_ESCAPE
#define VK_ESCAPE '\e'
#endif
static size_t zend_compute_escaped_string_len(const char *s, size_t l) {
size_t i, len = l;
for (i = 0; i < l; ++i) {
char c = s[i];
if (c == '\n' || c == '\r' || c == '\t' ||
c == '\f' || c == '\v' || c == '\\' || c == VK_ESCAPE) {
len += 1;
} else if (c < 32 || c > 126) {
len += 3;
}
}
return len;
}
ZEND_API void ZEND_FASTCALL smart_str_append_escaped(smart_str *str, const char *s, size_t l) {
char *res;
size_t i, len = zend_compute_escaped_string_len(s, l);
smart_str_alloc(str, len, 0);
res = &ZSTR_VAL(str->s)[ZSTR_LEN(str->s)];
ZSTR_LEN(str->s) += len;
for (i = 0; i < l; ++i) {
unsigned char c = s[i];
if (c < 32 || c == '\\' || c > 126) {
*res++ = '\\';
switch (c) {
case '\n': *res++ = 'n'; break;
case '\r': *res++ = 'r'; break;
case '\t': *res++ = 't'; break;
case '\f': *res++ = 'f'; break;
case '\v': *res++ = 'v'; break;
case '\\': *res++ = '\\'; break;
case VK_ESCAPE: *res++ = 'e'; break;
default:
*res++ = 'x';
if ((c >> 4) < 10) {
*res++ = (c >> 4) + '0';
} else {
*res++ = (c >> 4) + 'A' - 10;
}
if ((c & 0xf) < 10) {
*res++ = (c & 0xf) + '0';
} else {
*res++ = (c & 0xf) + 'A' - 10;
}
}
} else {
*res++ = c;
}
}
}
ZEND_API void ZEND_FASTCALL smart_str_append_printf(smart_str *dest, const char *format, ...) {
va_list arg;
va_start(arg, format);
zend_printf_to_smart_str(dest, format, arg);
va_end(arg);
}
#define SMART_STRING_OVERHEAD (ZEND_MM_OVERHEAD + 1)
#define SMART_STRING_START_SIZE 256
#define SMART_STRING_START_LEN (SMART_STRING_START_SIZE - SMART_STRING_OVERHEAD)
#define SMART_STRING_PAGE 4096
ZEND_API void ZEND_FASTCALL _smart_string_alloc_persistent(smart_string *str, size_t len)
{
if (!str->c) {
str->len = 0;
if (len <= SMART_STRING_START_LEN) {
str->a = SMART_STRING_START_LEN;
} else {
str->a = ZEND_MM_ALIGNED_SIZE_EX(len + SMART_STRING_OVERHEAD, SMART_STRING_PAGE) - SMART_STRING_OVERHEAD;
}
str->c = pemalloc(str->a + 1, 1);
} else {
if (UNEXPECTED((size_t) len > SIZE_MAX - str->len)) {
zend_error(E_ERROR, "String size overflow");
}
len += str->len;
str->a = ZEND_MM_ALIGNED_SIZE_EX(len + SMART_STRING_OVERHEAD, SMART_STRING_PAGE) - SMART_STRING_OVERHEAD;
str->c = perealloc(str->c, str->a + 1, 1);
}
}
ZEND_API void ZEND_FASTCALL _smart_string_alloc(smart_string *str, size_t len)
{
if (!str->c) {
str->len = 0;
if (len <= SMART_STRING_START_LEN) {
str->a = SMART_STRING_START_LEN;
str->c = emalloc(SMART_STRING_START_LEN + 1);
} else {
str->a = ZEND_MM_ALIGNED_SIZE_EX(len + SMART_STRING_OVERHEAD, SMART_STRING_PAGE) - SMART_STRING_OVERHEAD;
str->c = emalloc_large(str->a + 1);
}
} else {
if (UNEXPECTED((size_t) len > SIZE_MAX - str->len)) {
zend_error(E_ERROR, "String size overflow");
}
len += str->len;
str->a = ZEND_MM_ALIGNED_SIZE_EX(len + SMART_STRING_OVERHEAD, SMART_STRING_PAGE) - SMART_STRING_OVERHEAD;
str->c = erealloc2(str->c, str->a + 1, str->len);
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
|
