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ef13ab5750
and handle some corner cases better. The scanner has been changed to the format as proposed in "RE2C - A More Versatile Scanner Generator" by Cowan et al.
655 lines
16 KiB
C
655 lines
16 KiB
C
/*
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+----------------------------------------------------------------------+
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| PHP version 4.0 |
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+----------------------------------------------------------------------+
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| Copyright (c) 1997-2001 The PHP Group |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.02 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 at through the world-wide-web at |
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| http://www.php.net/license/2_02.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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| Authors: Zeev Suraski <zeev@zend.com> |
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| Thies C. Arntzen <thies@thieso.net> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#include "php.h"
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#include "ext/standard/head.h"
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#include "ext/session/php_session.h"
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#include "basic_functions.h"
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#include "SAPI.h"
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/* output functions */
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static int php_ub_body_write(const char *str, uint str_length);
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static int php_ub_body_write_no_header(const char *str, uint str_length);
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static int php_b_body_write(const char *str, uint str_length);
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static void php_ob_init(uint initial_size, uint block_size, zval *output_handler, uint chunk_size);
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static void php_ob_append(const char *text, uint text_length);
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#if 0
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static void php_ob_prepend(const char *text, uint text_length);
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#endif
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#ifdef ZTS
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int output_globals_id;
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#else
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php_output_globals output_globals;
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#endif
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static int php_default_output_func(const char *str, uint str_len)
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{
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fwrite(str, 1, str_len, stderr);
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return str_len;
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}
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static void php_output_init_globals(OLS_D)
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{
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OG(php_body_write) = php_default_output_func;
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OG(php_header_write) = php_default_output_func;
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OG(implicit_flush) = 0;
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OG(output_start_filename) = NULL;
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OG(output_start_lineno) = 0;
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}
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/* Start output layer */
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PHPAPI void php_output_startup(void)
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{
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#ifdef ZTS
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output_globals_id = ts_allocate_id(sizeof(php_output_globals), (ts_allocate_ctor) php_output_init_globals, NULL);
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#else
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php_output_init_globals(OLS_C);
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#endif
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}
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PHPAPI void php_output_activate(void)
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{
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OLS_FETCH();
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OG(php_body_write) = php_ub_body_write;
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OG(php_header_write) = sapi_module.ub_write;
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OG(nesting_level) = 0;
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OG(lock) = 0;
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}
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void php_output_register_constants()
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{
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ELS_FETCH();
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REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_START", PHP_OUTPUT_HANDLER_START, CONST_CS | CONST_PERSISTENT);
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REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_CONT", PHP_OUTPUT_HANDLER_CONT, CONST_CS | CONST_PERSISTENT);
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REGISTER_MAIN_LONG_CONSTANT("PHP_OUTPUT_HANDLER_END", PHP_OUTPUT_HANDLER_END, CONST_CS | CONST_PERSISTENT);
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}
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PHPAPI int php_body_write(const char *str, uint str_length)
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{
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OLS_FETCH();
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return OG(php_body_write)(str, str_length);
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}
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PHPAPI int php_header_write(const char *str, uint str_length)
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{
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OLS_FETCH();
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return OG(php_header_write)(str, str_length);
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}
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/* {{{ php_start_ob_buffer
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* Start output buffering */
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PHPAPI int php_start_ob_buffer(zval *output_handler, uint chunk_size)
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{
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OLS_FETCH();
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if (OG(lock)) {
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return FAILURE;
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}
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if (chunk_size) {
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php_ob_init((chunk_size*3/2), chunk_size/2, output_handler, chunk_size);
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} else {
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php_ob_init(40*1024, 10*1024, output_handler, chunk_size);
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}
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OG(php_body_write) = php_b_body_write;
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return SUCCESS;
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}
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/* }}} */
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/* {{{ php_end_ob_buffer
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* End output buffering (one level) */
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PHPAPI void php_end_ob_buffer(zend_bool send_buffer, zend_bool just_flush)
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{
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char *final_buffer=NULL;
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int final_buffer_length=0;
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zval *alternate_buffer=NULL;
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char *to_be_destroyed_buffer;
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char *to_be_destroyed_handled_output[2] = { 0, 0 };
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int status;
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SLS_FETCH();
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OLS_FETCH();
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if (OG(nesting_level)==0) {
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return;
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}
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status = 0;
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if (!OG(active_ob_buffer).status & PHP_OUTPUT_HANDLER_START) {
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/* our first call */
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status |= PHP_OUTPUT_HANDLER_START;
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}
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if (just_flush) {
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status |= PHP_OUTPUT_HANDLER_CONT;
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} else {
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status |= PHP_OUTPUT_HANDLER_END;
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}
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if (OG(active_ob_buffer).internal_output_handler) {
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final_buffer = OG(active_ob_buffer).internal_output_handler_buffer;
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final_buffer_length = OG(active_ob_buffer).internal_output_handler_buffer_size;
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OG(active_ob_buffer).internal_output_handler(OG(active_ob_buffer).buffer, OG(active_ob_buffer).text_length, &final_buffer, &final_buffer_length, status);
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} else if (OG(active_ob_buffer).output_handler) {
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zval **params[2];
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zval *orig_buffer;
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zval *z_status;
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CLS_FETCH();
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ALLOC_INIT_ZVAL(orig_buffer);
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orig_buffer->value.str.val = OG(active_ob_buffer).buffer;
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orig_buffer->value.str.len = OG(active_ob_buffer).text_length;
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orig_buffer->type = IS_STRING;
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orig_buffer->refcount=2; /* don't let call_user_function() destroy our buffer */
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orig_buffer->is_ref=1;
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ALLOC_INIT_ZVAL(z_status);
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Z_TYPE_P(z_status) = IS_LONG;
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Z_LVAL_P(z_status) = status;
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params[0] = &orig_buffer;
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params[1] = &z_status;
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OG(lock) = 1;
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if (call_user_function_ex(CG(function_table), NULL, OG(active_ob_buffer).output_handler, &alternate_buffer, 2, params, 1, NULL)==SUCCESS) {
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convert_to_string_ex(&alternate_buffer);
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final_buffer = alternate_buffer->value.str.val;
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final_buffer_length = alternate_buffer->value.str.len;
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}
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OG(lock) = 0;
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zval_ptr_dtor(&OG(active_ob_buffer).output_handler);
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if (orig_buffer->refcount==2) { /* free the zval */
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FREE_ZVAL(orig_buffer);
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} else {
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orig_buffer->refcount-=2;
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}
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zval_ptr_dtor(&z_status);
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}
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if (!final_buffer) {
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final_buffer = OG(active_ob_buffer).buffer;
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final_buffer_length = OG(active_ob_buffer).text_length;
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}
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if (OG(nesting_level)==1) { /* end buffering */
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if (SG(headers_sent) && !SG(request_info).headers_only) {
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OG(php_body_write) = php_ub_body_write_no_header;
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} else {
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OG(php_body_write) = php_ub_body_write;
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}
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}
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to_be_destroyed_buffer = OG(active_ob_buffer).buffer;
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if (OG(active_ob_buffer).internal_output_handler
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&& (final_buffer != OG(active_ob_buffer).internal_output_handler_buffer)) {
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to_be_destroyed_handled_output[0] = final_buffer;
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}
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if (!just_flush) {
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if (OG(active_ob_buffer).internal_output_handler) {
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to_be_destroyed_handled_output[1] = OG(active_ob_buffer).internal_output_handler_buffer;
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}
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if (OG(nesting_level)>1) { /* restore previous buffer */
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php_ob_buffer *ob_buffer_p;
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zend_stack_top(&OG(ob_buffers), (void **) &ob_buffer_p);
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OG(active_ob_buffer) = *ob_buffer_p;
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zend_stack_del_top(&OG(ob_buffers));
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if (OG(nesting_level)==2) { /* destroy the stack */
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zend_stack_destroy(&OG(ob_buffers));
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}
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}
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OG(nesting_level)--;
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}
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if (send_buffer) {
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OG(php_body_write)(final_buffer, final_buffer_length);
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}
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if (alternate_buffer) {
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zval_ptr_dtor(&alternate_buffer);
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}
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if (!just_flush) {
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efree(to_be_destroyed_buffer);
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} else {
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OG(active_ob_buffer).text_length = 0;
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OG(active_ob_buffer).status |= PHP_OUTPUT_HANDLER_START;
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OG(php_body_write) = php_b_body_write;
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}
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if (to_be_destroyed_handled_output[0]) {
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efree(to_be_destroyed_handled_output[0]);
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}
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if (to_be_destroyed_handled_output[1]) {
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efree(to_be_destroyed_handled_output[1]);
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}
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}
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/* }}} */
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/* {{{ php_end_ob_buffers
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* End output buffering (all buffers) */
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PHPAPI void php_end_ob_buffers(zend_bool send_buffer)
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{
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OLS_FETCH();
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BLS_FETCH();
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while (OG(nesting_level)!=0) {
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php_end_ob_buffer(send_buffer, 0);
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}
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if (send_buffer && BG(use_trans_sid)) {
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session_adapt_flush(OG(php_header_write));
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}
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}
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/* }}} */
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/* {{{ php_start_implicit_flush
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*/
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PHPAPI void php_start_implicit_flush()
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{
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OLS_FETCH();
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php_end_ob_buffer(1, 0); /* Switch out of output buffering if we're in it */
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OG(implicit_flush)=1;
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}
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/* }}} */
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/* {{{ php_end_implicit_flush
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*/
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PHPAPI void php_end_implicit_flush()
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{
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OLS_FETCH();
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OG(implicit_flush)=0;
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}
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/* }}} */
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/* {{{ php_ob_set_internal_handler
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*/
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PHPAPI void php_ob_set_internal_handler(php_output_handler_func_t internal_output_handler, uint buffer_size)
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{
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OLS_FETCH();
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if (OG(nesting_level)==0) {
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return;
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}
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OG(active_ob_buffer).internal_output_handler = internal_output_handler;
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OG(active_ob_buffer).internal_output_handler_buffer = (char *) emalloc(buffer_size);
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OG(active_ob_buffer).internal_output_handler_buffer_size = buffer_size;
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}
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/* }}} */
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/*
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* Output buffering - implementation
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*/
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/* {{{ php_ob_allocate
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*/
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static inline void php_ob_allocate(void)
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{
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OLS_FETCH();
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if (OG(active_ob_buffer).size<OG(active_ob_buffer).text_length) {
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while (OG(active_ob_buffer).size <= OG(active_ob_buffer).text_length) {
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OG(active_ob_buffer).size+=OG(active_ob_buffer).block_size;
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}
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OG(active_ob_buffer).buffer = (char *) erealloc(OG(active_ob_buffer).buffer, OG(active_ob_buffer).size+1);
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}
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}
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/* }}} */
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/* {{{ php_ob_init
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*/
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static void php_ob_init(uint initial_size, uint block_size, zval *output_handler, uint chunk_size)
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{
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OLS_FETCH();
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if (OG(nesting_level)>0) {
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if (OG(nesting_level)==1) { /* initialize stack */
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zend_stack_init(&OG(ob_buffers));
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}
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zend_stack_push(&OG(ob_buffers), &OG(active_ob_buffer), sizeof(php_ob_buffer));
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}
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OG(nesting_level)++;
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OG(active_ob_buffer).block_size = block_size;
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OG(active_ob_buffer).size = initial_size;
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OG(active_ob_buffer).buffer = (char *) emalloc(initial_size+1);
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OG(active_ob_buffer).text_length = 0;
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OG(active_ob_buffer).output_handler = output_handler;
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OG(active_ob_buffer).chunk_size = chunk_size;
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OG(active_ob_buffer).status = 0;
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OG(active_ob_buffer).internal_output_handler = NULL;
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}
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/* }}} */
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/* {{{ php_ob_append
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*/
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static void php_ob_append(const char *text, uint text_length)
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{
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char *target;
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int original_ob_text_length;
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OLS_FETCH();
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original_ob_text_length=OG(active_ob_buffer).text_length;
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OG(active_ob_buffer).text_length = OG(active_ob_buffer).text_length + text_length;
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php_ob_allocate();
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target = OG(active_ob_buffer).buffer+original_ob_text_length;
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memcpy(target, text, text_length);
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target[text_length]=0;
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if (OG(active_ob_buffer).chunk_size
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&& OG(active_ob_buffer).text_length >= OG(active_ob_buffer).chunk_size) {
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zval *output_handler = OG(active_ob_buffer).output_handler;
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if (output_handler) {
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output_handler->refcount++;
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}
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php_end_ob_buffer(1, 1);
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return;
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}
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}
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/* }}} */
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#if 0
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static void php_ob_prepend(const char *text, uint text_length)
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{
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char *p, *start;
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OLS_FETCH();
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OG(active_ob_buffer).text_length += text_length;
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php_ob_allocate();
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/* php_ob_allocate() may change OG(ob_buffer), so we can't initialize p&start earlier */
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p = OG(ob_buffer)+OG(ob_text_length);
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start = OG(ob_buffer);
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while (--p>=start) {
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p[text_length] = *p;
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}
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memcpy(OG(ob_buffer), text, text_length);
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OG(ob_buffer)[OG(active_ob_buffer).text_length]=0;
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}
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#endif
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/* {{{ php_ob_get_buffer
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* Return the current output buffer */
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int php_ob_get_buffer(pval *p)
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{
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OLS_FETCH();
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if (OG(nesting_level)==0) {
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return FAILURE;
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}
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p->type = IS_STRING;
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p->value.str.val = estrndup(OG(active_ob_buffer).buffer, OG(active_ob_buffer).text_length);
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p->value.str.len = OG(active_ob_buffer).text_length;
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return SUCCESS;
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}
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/* }}} */
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/* {{{ php_ob_get_length
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* Return the size of the current output buffer */
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int php_ob_get_length(pval *p)
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{
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OLS_FETCH();
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if (OG(nesting_level) == 0) {
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return FAILURE;
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}
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p->type = IS_LONG;
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p->value.lval = OG(active_ob_buffer).text_length;
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return SUCCESS;
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}
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/* }}} */
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/*
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* Wrapper functions - implementation
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*/
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/* buffered output function */
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static int php_b_body_write(const char *str, uint str_length)
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{
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php_ob_append(str, str_length);
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return str_length;
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}
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/* {{{ php_ub_body_write_no_header
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*/
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static int php_ub_body_write_no_header(const char *str, uint str_length)
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{
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char *newstr = NULL;
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size_t new_length=0;
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int result;
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OLS_FETCH();
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BLS_FETCH();
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if (BG(use_trans_sid)) {
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session_adapt_uris(str, str_length, &newstr, &new_length);
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}
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if (newstr) {
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str = newstr;
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str_length = new_length;
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}
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result = OG(php_header_write)(str, str_length);
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if (OG(implicit_flush)) {
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sapi_flush();
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}
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return result;
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}
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/* }}} */
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/* {{{ php_ub_body_write
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*/
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static int php_ub_body_write(const char *str, uint str_length)
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{
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int result = 0;
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SLS_FETCH();
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OLS_FETCH();
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if (SG(request_info).headers_only) {
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php_header();
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zend_bailout();
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}
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if (php_header()) {
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if (zend_is_compiling()) {
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CLS_FETCH();
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OG(output_start_filename) = zend_get_compiled_filename(CLS_C);
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OG(output_start_lineno) = zend_get_compiled_lineno(CLS_C);
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} else if (zend_is_executing()) {
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ELS_FETCH();
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OG(output_start_filename) = zend_get_executed_filename(ELS_C);
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OG(output_start_lineno) = zend_get_executed_lineno(ELS_C);
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}
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OG(php_body_write) = php_ub_body_write_no_header;
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result = php_ub_body_write_no_header(str, str_length);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
/* }}} */
|
|
|
|
/*
|
|
* HEAD support
|
|
*/
|
|
|
|
/* {{{ proto void ob_start([ string user_function [, int chunk_size]])
|
|
Turn on Output Buffering (specifying an optional output handler). */
|
|
PHP_FUNCTION(ob_start)
|
|
{
|
|
zval *output_handler;
|
|
uint chunk_size=0;
|
|
|
|
switch (ZEND_NUM_ARGS()) {
|
|
case 0:
|
|
output_handler = NULL;
|
|
break;
|
|
case 1: {
|
|
zval **output_handler_p;
|
|
|
|
if (zend_get_parameters_ex(1, &output_handler_p)==FAILURE) {
|
|
RETURN_FALSE;
|
|
}
|
|
SEPARATE_ZVAL(output_handler_p);
|
|
output_handler = *output_handler_p;
|
|
output_handler->refcount++;
|
|
}
|
|
break;
|
|
case 2: {
|
|
zval **output_handler_p, **chunk_size_p;
|
|
|
|
if (zend_get_parameters_ex(2, &output_handler_p, &chunk_size_p)==FAILURE) {
|
|
RETURN_FALSE;
|
|
}
|
|
SEPARATE_ZVAL(output_handler_p);
|
|
output_handler = *output_handler_p;
|
|
output_handler->refcount++;
|
|
convert_to_long_ex(chunk_size_p);
|
|
chunk_size = (uint) Z_LVAL_PP(chunk_size_p);
|
|
}
|
|
break;
|
|
default:
|
|
ZEND_WRONG_PARAM_COUNT();
|
|
break;
|
|
}
|
|
if (php_start_ob_buffer(output_handler, chunk_size)==FAILURE) {
|
|
SLS_FETCH();
|
|
OLS_FETCH();
|
|
|
|
if (SG(headers_sent) && !SG(request_info).headers_only) {
|
|
OG(php_body_write) = php_ub_body_write_no_header;
|
|
} else {
|
|
OG(php_body_write) = php_ub_body_write;
|
|
}
|
|
OG(nesting_level) = 0;
|
|
php_error(E_ERROR, "Cannot use output buffering in output buffering display handlers");
|
|
RETURN_FALSE;
|
|
}
|
|
RETURN_TRUE;
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ proto void ob_end_flush(void)
|
|
Flush (send) the output buffer, and turn off output buffering */
|
|
PHP_FUNCTION(ob_end_flush)
|
|
{
|
|
php_end_ob_buffer(1, 0);
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ proto void ob_end_clean(void)
|
|
Clean (erase) the output buffer, and turn off output buffering */
|
|
PHP_FUNCTION(ob_end_clean)
|
|
{
|
|
php_end_ob_buffer(0, 0);
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ proto string ob_get_contents(void)
|
|
Return the contents of the output buffer */
|
|
PHP_FUNCTION(ob_get_contents)
|
|
{
|
|
if (php_ob_get_buffer(return_value)==FAILURE) {
|
|
RETURN_FALSE;
|
|
}
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ proto string ob_get_length(void)
|
|
Return the length of the output buffer */
|
|
PHP_FUNCTION(ob_get_length)
|
|
{
|
|
if (php_ob_get_length(return_value)==FAILURE) {
|
|
RETURN_FALSE;
|
|
}
|
|
}
|
|
/* }}} */
|
|
|
|
/* {{{ proto void ob_implicit_flush([int flag])
|
|
Turn implicit flush on/off and is equivalent to calling flush() after every output call */
|
|
PHP_FUNCTION(ob_implicit_flush)
|
|
{
|
|
zval **zv_flag;
|
|
int flag;
|
|
|
|
switch(ZEND_NUM_ARGS()) {
|
|
case 0:
|
|
flag = 1;
|
|
break;
|
|
case 1:
|
|
if (zend_get_parameters_ex(1, &zv_flag)==FAILURE) {
|
|
RETURN_FALSE;
|
|
}
|
|
convert_to_long_ex(zv_flag);
|
|
flag = (*zv_flag)->value.lval;
|
|
break;
|
|
default:
|
|
WRONG_PARAM_COUNT;
|
|
break;
|
|
}
|
|
if (flag) {
|
|
php_start_implicit_flush();
|
|
} else {
|
|
php_end_implicit_flush();
|
|
}
|
|
}
|
|
/* }}} */
|
|
|
|
PHPAPI char *php_get_output_start_filename()
|
|
{
|
|
OLS_FETCH();
|
|
|
|
return OG(output_start_filename);
|
|
}
|
|
|
|
|
|
PHPAPI int php_get_output_start_lineno()
|
|
{
|
|
OLS_FETCH();
|
|
|
|
return OG(output_start_lineno);
|
|
}
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* End:
|
|
* vim600: sw=4 ts=4 tw=78 fdm=marker
|
|
* vim<600: sw=4 ts=4 tw=78
|
|
*/
|