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127 lines
3.9 KiB
C
127 lines
3.9 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP Version 7 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2016 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 3.01 of the PHP license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.php.net/license/3_01.txt |
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| If you did not receive a copy of the PHP license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@php.net so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Author: Dmitry Stogov <dmitry@zend.com> |
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+----------------------------------------------------------------------+
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*/
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#include <zend.h>
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#include "zend_smart_str.h"
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#define SMART_STR_OVERHEAD (ZEND_MM_OVERHEAD + _ZSTR_HEADER_SIZE)
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#ifndef SMART_STR_PAGE
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# define SMART_STR_PAGE 4096
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#endif
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#ifndef SMART_STR_START_SIZE
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# define SMART_STR_START_SIZE (256 - SMART_STR_OVERHEAD - 1)
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#endif
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#define SMART_STR_NEW_SIZE(len) \
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(((len + SMART_STR_OVERHEAD + SMART_STR_PAGE) & ~(SMART_STR_PAGE - 1)) - SMART_STR_OVERHEAD - 1)
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ZEND_API void ZEND_FASTCALL smart_str_erealloc(smart_str *str, size_t len)
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{
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if (UNEXPECTED(!str->s)) {
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str->a = len < SMART_STR_START_SIZE
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? SMART_STR_START_SIZE
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: SMART_STR_NEW_SIZE(len);
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str->s = zend_string_alloc(str->a, 0);
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ZSTR_LEN(str->s) = 0;
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} else {
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str->a = SMART_STR_NEW_SIZE(len);
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str->s = (zend_string *) erealloc2(str->s, _ZSTR_HEADER_SIZE + str->a + 1, _ZSTR_HEADER_SIZE + ZSTR_LEN(str->s) + 1);
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}
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}
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ZEND_API void ZEND_FASTCALL smart_str_realloc(smart_str *str, size_t len)
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{
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if (UNEXPECTED(!str->s)) {
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str->a = len < SMART_STR_START_SIZE
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? SMART_STR_START_SIZE
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: SMART_STR_NEW_SIZE(len);
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str->s = zend_string_alloc(str->a, 1);
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ZSTR_LEN(str->s) = 0;
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} else {
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str->a = SMART_STR_NEW_SIZE(len);
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str->s = (zend_string *) realloc(str->s, _ZSTR_HEADER_SIZE + str->a + 1);
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}
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}
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/* Windows uses VK_ESCAPE instead of \e */
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#ifndef VK_ESCAPE
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#define VK_ESCAPE '\e'
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#endif
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static size_t zend_compute_escaped_string_len(const char *s, size_t l) {
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size_t i, len = l;
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for (i = 0; i < l; ++i) {
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char c = s[i];
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if (c == '\n' || c == '\r' || c == '\t' ||
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c == '\f' || c == '\v' || c == '\\' || c == VK_ESCAPE) {
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len += 1;
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} else if (c < 32 || c > 126) {
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len += 3;
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}
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}
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return len;
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}
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ZEND_API void ZEND_FASTCALL smart_str_append_escaped(smart_str *str, const char *s, size_t l) {
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char *res;
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size_t i, len = zend_compute_escaped_string_len(s, l);
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smart_str_alloc(str, len, 0);
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res = &ZSTR_VAL(str->s)[ZSTR_LEN(str->s)];
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ZSTR_LEN(str->s) += len;
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for (i = 0; i < l; ++i) {
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unsigned char c = s[i];
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if (c < 32 || c == '\\' || c > 126) {
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*res++ = '\\';
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switch (c) {
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case '\n': *res++ = 'n'; break;
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case '\r': *res++ = 'r'; break;
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case '\t': *res++ = 't'; break;
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case '\f': *res++ = 'f'; break;
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case '\v': *res++ = 'v'; break;
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case '\\': *res++ = '\\'; break;
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case VK_ESCAPE: *res++ = 'e'; break;
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default:
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*res++ = 'x';
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if ((c >> 4) < 10) {
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*res++ = (c >> 4) + '0';
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} else {
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*res++ = (c >> 4) + 'A' - 10;
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}
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if ((c & 0xf) < 10) {
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*res++ = (c & 0xf) + '0';
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} else {
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*res++ = (c & 0xf) + 'A' - 10;
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}
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}
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} else {
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*res++ = c;
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}
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}
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}
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ZEND_API void ZEND_FASTCALL smart_str_append_printf(smart_str *dest, const char *format, ...) {
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va_list arg;
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va_start(arg, format);
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zend_printf_to_smart_str(dest, format, arg);
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va_end(arg);
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}
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