mirror of
https://github.com/php/php-src.git
synced 2024-10-17 22:42:38 +00:00
517 lines
13 KiB
Plaintext
517 lines
13 KiB
Plaintext
%{
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/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2006 Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend 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.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend 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@zend.com 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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| Jani Taskinen <jani@php.net> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#define DEBUG_CFG_SCANNER 0
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#define yyleng SCNG(yy_leng)
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#define yytext SCNG(yy_text)
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#define yytext_ptr SCNG(yy_text)
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#define yyin SCNG(yy_in)
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#define yyout SCNG(yy_out)
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/* How it works (for the core ini directives):
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* ===========================================
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*
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* 1. Scanner scans file for tokens and passes them to parser.
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* 2. Parser parses the tokens and passes the name/value pairs to the callback
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* function which stores them in the configuration hash table.
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* 3. Later REGISTER_INI_ENTRIES() is called which triggers the actual
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* registering of ini entries and uses zend_get_configuration_directive()
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* to fetch the previously stored name/value pair from configuration hash table
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* and registers the static ini entries which match the name to the value
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* into EG(ini_directives) hash table.
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* 4. PATH section entries are used per-request from down to top, each overriding
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* previous if one exists. zend_alter_ini_entry() is called for each entry.
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* Settings in PATH section are ZEND_INI_SYSTEM accessible and thus mimics the
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* php_admin_* directives used within Apache httpd.conf when PHP is compiled as
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* module for Apache.
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* 5. User defined ini files (like .htaccess for apache) are parsed for each request and
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* stored in separate hash defined by SAPI.
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*/
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/* TODO: (ordered by importance :-)
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* ===============================================================================
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*
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* - Separate constant lookup totally from plain strings (using CONSTANT pattern)
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* - Add #if .. #else .. #endif and ==, !=, <, > , <=, >= operators
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* - Add #include "some.ini"
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* - Allow variables to refer to options also when using parse_ini_file()
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*
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*/
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/* These are not needed when yymore() is not used */
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/*
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#define yy_last_accepting_state SCNG(_yy_last_accepting_state)
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#define yy_last_accepting_cpos SCNG(_yy_last_accepting_cpos)
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#define yy_more_flag SCNG(_yy_more_flag)
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#define yy_more_len SCNG(_yy_more_len)
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*/
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%}
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%x ST_DOUBLE_QUOTES
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%x ST_OFFSET
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%x ST_RAW
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%x ST_SECTION_RAW
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%x ST_SECTION_VALUE
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%x ST_VALUE
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%x ST_VARNAME
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%option stack
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%{
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#include <errno.h>
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#include "zend.h"
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#include "zend_globals.h"
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#include <zend_ini_parser.h>
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#include "zend_ini_scanner.h"
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#define YY_DECL int ini_lex(zval *ini_lval TSRMLS_DC)
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#define YY_INPUT(buf, result, max_size) \
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if ( ((result = zend_stream_read(yyin, buf, max_size TSRMLS_CC)) == 0) \
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&& zend_stream_ferror( yyin TSRMLS_CC) ) \
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YY_FATAL_ERROR( "input in flex scanner failed" );
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/* Globals Macros */
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#define SCNG INI_SCNG
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#ifdef ZTS
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ZEND_API ts_rsrc_id ini_scanner_globals_id;
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#else
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ZEND_API zend_scanner_globals ini_scanner_globals;
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#endif
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/* Eat trailing whitespace + extra char */
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#define EAT_TRAILING_WHITESPACE_EX(ch) \
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while (yyleng > 0 && ( \
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(ch != 'X' && yytext[yyleng - 1] == ch) || \
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yytext[yyleng - 1] == '\n' || \
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yytext[yyleng - 1] == '\r' || \
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yytext[yyleng - 1] == '\t' || \
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yytext[yyleng - 1] == ' ') \
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) { \
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yyleng--; \
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yytext[yyleng]=0; \
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}
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/* Eat trailing whitespace */
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#define EAT_TRAILING_WHITESPACE() EAT_TRAILING_WHITESPACE_EX('X')
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#define zend_ini_copy_value(retval, str, len) { \
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Z_STRVAL_P(retval) = zend_strndup(str, len); \
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Z_STRLEN_P(retval) = len; \
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Z_TYPE_P(retval) = IS_STRING; \
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}
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#define RETURN_TOKEN(type, str, len) { \
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zend_ini_copy_value(ini_lval, str, len); \
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return type; \
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}
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static char *ini_filename;
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/* {{{ init_ini_scanner()
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*/
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static void init_ini_scanner(TSRMLS_D)
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{
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SCNG(lineno) = 1;
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SCNG(scanner_mode) = ZEND_INI_SCANNER_NORMAL;
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SCNG(yy_start_stack_ptr) = 0;
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SCNG(yy_start_stack_depth) = 0;
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SCNG(current_buffer) = NULL;
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}
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/* }}} */
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/* {{{ shutdown_ini_scanner()
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*/
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void shutdown_ini_scanner(TSRMLS_D)
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{
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if (SCNG(yy_start_stack)) {
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yy_flex_free(SCNG(yy_start_stack));
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SCNG(yy_start_stack) = NULL;
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}
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yy_delete_buffer(SCNG(current_buffer) TSRMLS_CC);
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if (ini_filename) {
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free(ini_filename);
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}
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}
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/* }}} */
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/* {{{ zend_ini_scanner_get_lineno()
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*/
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int zend_ini_scanner_get_lineno(TSRMLS_D)
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{
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return SCNG(lineno);
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}
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/* }}} */
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/* {{{ zend_ini_scanner_get_filename()
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*/
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char *zend_ini_scanner_get_filename(TSRMLS_D)
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{
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return ini_filename;
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}
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/* }}} */
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/* {{{ zend_ini_open_file_for_scanning()
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*/
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int zend_ini_open_file_for_scanning(zend_file_handle *fh, int scanner_mode TSRMLS_DC)
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{
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if (FAILURE == zend_stream_fixup(fh TSRMLS_CC)) {
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return FAILURE;
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}
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init_ini_scanner(TSRMLS_C);
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SCNG(scanner_mode) = scanner_mode;
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yyin = fh;
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yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE TSRMLS_CC) TSRMLS_CC);
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ini_filename = zend_strndup(fh->filename, strlen(fh->filename));
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return SUCCESS;
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}
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/* }}} */
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/* {{{ zend_ini_prepare_string_for_scanning()
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*/
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int zend_ini_prepare_string_for_scanning(char *str, int scanner_mode TSRMLS_DC)
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{
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int len = strlen(str);
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init_ini_scanner(TSRMLS_C);
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SCNG(scanner_mode) = scanner_mode;
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yyin = NULL;
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yy_scan_buffer(str, len + 2 TSRMLS_CC);
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ini_filename = NULL;
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return SUCCESS;
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}
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/* }}} */
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/* {{{ zend_ini_close_file()
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*/
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void zend_ini_close_file(zend_file_handle *fh TSRMLS_DC)
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{
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zend_stream_close(fh);
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}
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/* }}} */
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/* {{{ zend_ini_escape_string()
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*/
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static void zend_ini_escape_string(zval *lval, char *str, int len, char quote_type TSRMLS_DC)
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{
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register char *s, *t;
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char *end;
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zend_ini_copy_value(lval, str, len);
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/* convert escape sequences */
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s = t = Z_STRVAL_P(lval);
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end = s + Z_STRLEN_P(lval);
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while (s < end) {
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if (*s == '\\') {
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s++;
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if (s >= end) {
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continue;
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}
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switch (*s) {
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case 'n':
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*t++ = '\n';
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Z_STRLEN_P(lval)--;
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break;
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case 'r':
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*t++ = '\r';
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Z_STRLEN_P(lval)--;
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break;
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case 't':
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*t++ = '\t';
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Z_STRLEN_P(lval)--;
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break;
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case '"':
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if (*s != quote_type) {
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*t++ = '\\';
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*t++ = *s;
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break;
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}
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case '\\':
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case '$':
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*t++ = *s;
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Z_STRLEN_P(lval)--;
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break;
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default:
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*t++ = '\\';
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*t++ = *s;
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break;
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}
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} else {
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*t++ = *s;
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}
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if (*s == '\n' || (*s == '\r' && (*(s+1) != '\n'))) {
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SCNG(lineno)++;
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}
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s++;
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}
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*t = 0;
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}
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/* }}} */
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%}
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LNUM [0-9]+
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DNUM ([0-9]*[\.][0-9]+)|([0-9]+[\.][0-9]*)
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NUMBER {LNUM}|{DNUM}
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ANY_CHAR (.|[\n])
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NEWLINE ("\r"|"\n"|"\r\n")
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TABS_AND_SPACES [ \t]
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CONSTANT [a-zA-Z][a-zA-Z0-9_]*
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LABEL [a-zA-Z0-9][a-zA-Z0-9._]*
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TOKENS [:,.\[\]"'()|^&+-/*=%$!~<>?@]
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OPERATORS [&|~()!]
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LITERAL_DOLLAR ("$"+([^a-zA-Z0-9$"'\\{]|("\\"{ANY_CHAR})))
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VALUE_CHARS ("{"*([^=\n\r;&|~()!$"'\\{]|("\\"{ANY_CHAR}))|{LITERAL_DOLLAR})
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RAW_VALUE_CHARS [^=\n\r;]
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SINGLE_QUOTED_CHARS [^']
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SECTION_VALUE_CHARS ("{"*([^\n\r;$"'\\{\]]|("\\"{ANY_CHAR}))|{LITERAL_DOLLAR})
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SECTION_RAW_CHARS [^\]\n\r]
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/* Allow using ${foobar} inside quoted strings */
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DOUBLE_QUOTES_CHARS ("{"*([^$"\\{]|("\\"{ANY_CHAR}))|{LITERAL_DOLLAR})
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/* " */
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%option nounput
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%option noyywrap
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%option noyylineno
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%option noyy_top_state
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%option never-interactive
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%%
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<INITIAL>"[" { /* Section start */
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/* Enter section data lookup state */
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if (SCNG(scanner_mode) == ZEND_INI_SCANNER_RAW) {
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yy_push_state(ST_SECTION_RAW TSRMLS_CC);
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} else {
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yy_push_state(ST_SECTION_VALUE TSRMLS_CC);
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}
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return TC_SECTION;
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}
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<ST_VALUE,ST_SECTION_VALUE,ST_OFFSET>"'"{SINGLE_QUOTED_CHARS}+"'" { /* Raw string */
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/* Eat leading and trailing single quotes */
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if (yytext[0] == '\'' && yytext[yyleng - 1] == '\'') {
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yytext++;
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yyleng = yyleng - 2;
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yytext[yyleng] = 0;
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}
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RETURN_TOKEN(TC_RAW, yytext, yyleng);
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}
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<ST_SECTION_RAW,ST_SECTION_VALUE>"]"{TABS_AND_SPACES}*{NEWLINE}? { /* End of section */
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BEGIN(INITIAL);
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SCNG(lineno)++;
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return ']';
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}
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<INITIAL>{LABEL}"["{TABS_AND_SPACES}* { /* Start of option with offset */
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/* Eat trailing whitespace and [ */
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EAT_TRAILING_WHITESPACE_EX('[');
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/* Enter offset lookup state */
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yy_push_state(ST_OFFSET TSRMLS_CC);
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RETURN_TOKEN(TC_OFFSET, yytext, yyleng);
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}
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<ST_OFFSET>{TABS_AND_SPACES}*"]" { /* End of section or an option offset */
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BEGIN(INITIAL);
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return ']';
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}
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<ST_DOUBLE_QUOTES,ST_SECTION_VALUE,ST_VALUE,ST_OFFSET>"${" { /* Variable start */
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yy_push_state(ST_VARNAME TSRMLS_CC);
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return TC_DOLLAR_CURLY;
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}
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<ST_VARNAME>{LABEL} { /* Variable name */
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RETURN_TOKEN(TC_VARNAME, yytext, yyleng);
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}
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<ST_VARNAME>"}" { /* Variable end */
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yy_pop_state(TSRMLS_C);
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return '}';
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}
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<INITIAL,ST_VALUE>("true"|"on"|"yes"){TABS_AND_SPACES}* { /* TRUE value (when used outside option value/offset this causes parse error!) */
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RETURN_TOKEN(BOOL_TRUE, "1", 1);
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}
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<INITIAL,ST_VALUE>("false"|"off"|"no"|"none"|"null"){TABS_AND_SPACES}* { /* FALSE value (when used outside option value/offset this causes parse error!)*/
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RETURN_TOKEN(BOOL_FALSE, "", 0);
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}
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<INITIAL,ST_OFFSET>{LABEL} { /* Get option name or option offset value */
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RETURN_TOKEN(TC_STRING, yytext, yyleng);
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}
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<INITIAL>{TABS_AND_SPACES}*[=]{TABS_AND_SPACES}* { /* Start option value */
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if (SCNG(scanner_mode) == ZEND_INI_SCANNER_RAW) {
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yy_push_state(ST_RAW TSRMLS_CC);
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} else {
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yy_push_state(ST_VALUE TSRMLS_CC);
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}
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return '=';
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}
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<ST_RAW>{RAW_VALUE_CHARS}+ { /* Raw value, only used when SCNG(scanner_mode) == ZEND_INI_SCANNER_RAW. */
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/* Eat leading and trailing double quotes */
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if (yytext[0] == '"' && yytext[yyleng - 1] == '"') {
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yytext++;
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yyleng = yyleng - 2;
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yytext[yyleng] = 0;
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}
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RETURN_TOKEN(TC_RAW, yytext, yyleng);
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}
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<ST_SECTION_RAW>{SECTION_RAW_CHARS}+ { /* Raw value, only used when SCNG(scanner_mode) == ZEND_INI_SCANNER_RAW. */
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RETURN_TOKEN(TC_RAW, yytext, yyleng);
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}
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<ST_VALUE,ST_RAW>{NEWLINE} { /* End of option value */
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BEGIN(INITIAL);
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SCNG(lineno)++;
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return END_OF_LINE;
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}
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<ST_VALUE,ST_OFFSET>{CONSTANT} { /* Get constant option value */
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RETURN_TOKEN(TC_STRING, yytext, yyleng);
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}
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<ST_VALUE,ST_OFFSET>{NUMBER} { /* Get number option value as string */
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RETURN_TOKEN(TC_NUMBER, yytext, yyleng);
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}
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<INITIAL>{TOKENS} { /* Disallow these chars outside option values */
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return yytext[0];
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}
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<ST_VALUE>{OPERATORS}{TABS_AND_SPACES}* { /* Boolean operators */
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return yytext[0];
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}
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<ST_VALUE>[=] { /* Make = used in option value to trigger error */
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yyless(yyleng - 1);
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BEGIN(INITIAL);
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return END_OF_LINE;
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}
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<ST_VALUE>{VALUE_CHARS}+ { /* Get everything else as option/offset value */
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/* Eat trailing tabs and spaces */
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EAT_TRAILING_WHITESPACE();
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RETURN_TOKEN(TC_STRING, yytext, yyleng);
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}
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<ST_SECTION_VALUE,ST_OFFSET>{SECTION_VALUE_CHARS}+ { /* Get rest as section/offset value */
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RETURN_TOKEN(TC_STRING, yytext, yyleng);
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}
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<ST_SECTION_VALUE,ST_VALUE,ST_OFFSET>["] { /* Double quoted '"' string start */
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yy_push_state(ST_DOUBLE_QUOTES TSRMLS_CC);
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return '"';
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}
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<ST_DOUBLE_QUOTES>{DOUBLE_QUOTES_CHARS}+ { /* Escape double quoted string contents */
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zend_ini_escape_string(ini_lval, yytext, yyleng, '"' TSRMLS_CC);
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return TC_QUOTED_STRING;
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}
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<ST_DOUBLE_QUOTES>["] { /* Double quoted '"' string ends */
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yy_pop_state(TSRMLS_C);
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return '"';
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}
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<INITIAL,ST_VALUE,ST_RAW,ST_OFFSET>{TABS_AND_SPACES} {
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/* eat whitespace */
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}
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<INITIAL>{NEWLINE} {
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SCNG(lineno)++;
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return END_OF_LINE;
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}
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<INITIAL,ST_VALUE,ST_RAW>[;][^\r\n]*{NEWLINE} { /* Comment */
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BEGIN(INITIAL);
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SCNG(lineno)++;
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return END_OF_LINE;
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}
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<ST_VALUE,ST_RAW><<EOF>> { /* End of option value (if EOF is reached before EOL */
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BEGIN(INITIAL);
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return END_OF_LINE;
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}
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<<EOF>> {
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#if DEBUG_CFG_SCANNER
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while (YYSTATE != INITIAL) {
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switch (YYSTATE) {
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case INITIAL:
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break;
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case ST_DOUBLE_QUOTES:
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fprintf(stderr, "ERROR: Unterminated ini option value double quotes\n");
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break;
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case ST_OFFSET:
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fprintf(stderr, "ERROR: Unterminated ini option offset\n");
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break;
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case ST_RAW:
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fprintf(stderr, "ERROR: Unterminated raw ini option value\n");
|
|
break;
|
|
|
|
case ST_SECTION_RAW:
|
|
fprintf(stderr, "ERROR: Unterminated raw ini section value\n");
|
|
break;
|
|
|
|
case ST_SECTION_VALUE:
|
|
fprintf(stderr, "ERROR: Unterminated ini section value\n");
|
|
break;
|
|
|
|
case ST_VALUE:
|
|
fprintf(stderr, "ERROR: Unterminated ini option value\n");
|
|
break;
|
|
|
|
case ST_VARNAME:
|
|
fprintf(stderr, "ERROR: Unterminated ini variable\n");
|
|
break;
|
|
|
|
default:
|
|
fprintf(stderr, "BUG: Unknown state (%d)\n", YYSTATE);
|
|
break;
|
|
}
|
|
yy_pop_state(TSRMLS_C);
|
|
}
|
|
#endif
|
|
yyterminate();
|
|
}
|