2763 lines
100 KiB
C
2763 lines
100 KiB
C
/* -*- Mode: C; indent-tabs-mode:nil; c-basic-offset: 8-*- */
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/*
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* This file is part of The Croco Library
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2.1 of the GNU Lesser General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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* Author: Dodji Seketeli
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* See the COPYRIGHTS file for copyrights information.
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*/
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/**
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*@file
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*The definition of the #CRTknzr (tokenizer)
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*class.
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*/
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#include "string.h"
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#include "cr-tknzr.h"
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#include "cr-doc-handler.h"
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struct _CRTknzrPriv {
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/**The parser input stream of bytes*/
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CRInput *input;
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/**
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*A cache where tknzr_unget_token()
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*puts back the token. tknzr_get_next_token()
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*first look in this cache, and if and
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*only if it's empty, fetches the next token
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*from the input stream.
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*/
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CRToken *token_cache;
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/**
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*The position of the end of the previous token
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*or char fetched.
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*/
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CRInputPos prev_pos;
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CRDocHandler *sac_handler;
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/**
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*The reference count of the current instance
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*of #CRTknzr. Is manipulated by cr_tknzr_ref()
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*and cr_tknzr_unref().
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*/
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glong ref_count;
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};
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#define PRIVATE(obj) ((obj)->priv)
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/**
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*return TRUE if the character is a number ([0-9]), FALSE otherwise
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*@param a_char the char to test.
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*/
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#define IS_NUM(a_char) (((a_char) >= '0' && (a_char) <= '9')?TRUE:FALSE)
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/**
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*Checks if 'status' equals CR_OK. If not, goto the 'error' label.
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*
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*@param status the status (of type enum CRStatus) to test.
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*@param is_exception if set to FALSE, the final status returned the
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*current function will be CR_PARSING_ERROR. If set to TRUE, the
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*current status will be the current value of the 'status' variable.
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*
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*/
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#define CHECK_PARSING_STATUS(status, is_exception) \
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if ((status) != CR_OK) \
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{ \
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if (is_exception == FALSE) \
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{ \
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status = CR_PARSING_ERROR ; \
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} \
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goto error ; \
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}
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/**
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*Peeks the next char from the input stream of the current tokenizer.
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*invokes CHECK_PARSING_STATUS on the status returned by
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*cr_tknzr_input_peek_char().
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*
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*@param the current instance of #CRTkzr.
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*@param to_char a pointer to the char where to store the
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*char peeked.
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*/
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#define PEEK_NEXT_CHAR(a_tknzr, a_to_char) \
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{\
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status = cr_tknzr_peek_char (a_tknzr, a_to_char) ; \
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CHECK_PARSING_STATUS (status, TRUE) \
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}
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/**
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*Reads the next char from the input stream of the current parser.
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*In case of error, jumps to the "error:" label located in the
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*function where this macro is called.
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*@param parser the current instance of #CRTknzr
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*@param to_char a pointer to the guint32 char where to store
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*the character read.
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*/
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#define READ_NEXT_CHAR(a_tknzr, to_char) \
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status = cr_tknzr_read_char (a_tknzr, to_char) ;\
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CHECK_PARSING_STATUS (status, TRUE)
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/**
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*Gets information about the current position in
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*the input of the parser.
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*In case of failure, this macro returns from the
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*calling function and
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*returns a status code of type enum #CRStatus.
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*@param parser the current instance of #CRTknzr.
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*@param pos out parameter. A pointer to the position
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*inside the current parser input. Must
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*/
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#define RECORD_INITIAL_POS(a_tknzr, a_pos) \
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status = cr_input_get_cur_pos (PRIVATE \
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(a_tknzr)->input, a_pos) ; \
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g_return_val_if_fail (status == CR_OK, status)
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/**
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*Gets the address of the current byte inside the
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*parser input.
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*@param parser the current instance of #CRTknzr.
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*@param addr out parameter a pointer (guchar*)
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*to where the address must be put.
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*/
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#define RECORD_CUR_BYTE_ADDR(a_tknzr, a_addr) \
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status = cr_input_get_cur_byte_addr \
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(PRIVATE (a_tknzr)->input, a_addr) ; \
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CHECK_PARSING_STATUS (status, TRUE)
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/**
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*Peeks a byte from the topmost parser input at
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*a given offset from the current position.
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*If it fails, goto the "error:" label.
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*
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*@param a_parser the current instance of #CRTknzr.
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*@param a_offset the offset of the byte to peek, the
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*current byte having the offset '0'.
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*@param a_byte_ptr out parameter a pointer (guchar*) to
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*where the peeked char is to be stored.
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*/
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#define PEEK_BYTE(a_tknzr, a_offset, a_byte_ptr) \
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status = cr_tknzr_peek_byte (a_tknzr, \
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a_offset, \
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a_byte_ptr) ; \
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CHECK_PARSING_STATUS (status, TRUE) ;
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#define BYTE(a_input, a_n, a_eof) \
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cr_input_peek_byte2 (a_input, a_n, a_eof)
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/**
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*Reads a byte from the topmost parser input
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*steam.
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*If it fails, goto the "error" label.
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*@param a_parser the current instance of #CRTknzr.
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*@param a_byte_ptr the guchar * where to put the read char.
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*/
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#define READ_NEXT_BYTE(a_tknzr, a_byte_ptr) \
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status = \
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cr_input_read_byte (PRIVATE (a_tknzr)->input, a_byte_ptr) ;\
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CHECK_PARSING_STATUS (status, TRUE) ;
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/**
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*Skips a given number of byte in the topmost
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*parser input. Don't update line and column number.
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*In case of error, jumps to the "error:" label
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*of the surrounding function.
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*@param a_parser the current instance of #CRTknzr.
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*@param a_nb_bytes the number of bytes to skip.
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*/
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#define SKIP_BYTES(a_tknzr, a_nb_bytes) \
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status = cr_input_seek_index (PRIVATE (a_tknzr)->input, \
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CR_SEEK_CUR, a_nb_bytes) ; \
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CHECK_PARSING_STATUS (status, TRUE) ;
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/**
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*Skip utf8 encoded characters.
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*Updates line and column numbers.
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*@param a_parser the current instance of #CRTknzr.
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*@param a_nb_chars the number of chars to skip. Must be of
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*type glong.
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*/
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#define SKIP_CHARS(a_tknzr, a_nb_chars) \
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{ \
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gulong nb_chars = a_nb_chars ; \
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status = cr_input_consume_chars \
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(PRIVATE (a_tknzr)->input,0, &nb_chars) ; \
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CHECK_PARSING_STATUS (status, TRUE) ; \
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}
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/**
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*Tests the condition and if it is false, sets
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*status to "CR_PARSING_ERROR" and goto the 'error'
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*label.
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*@param condition the condition to test.
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*/
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#define ENSURE_PARSING_COND(condition) \
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if (! (condition)) {status = CR_PARSING_ERROR; goto error ;}
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static enum CRStatus cr_tknzr_parse_nl (CRTknzr * a_this,
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guchar ** a_start,
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guchar ** a_end,
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CRParsingLocation *a_location);
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static enum CRStatus cr_tknzr_parse_w (CRTknzr * a_this,
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guchar ** a_start,
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guchar ** a_end,
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CRParsingLocation *a_location) ;
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static enum CRStatus cr_tknzr_parse_unicode_escape (CRTknzr * a_this,
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guint32 * a_unicode,
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CRParsingLocation *a_location) ;
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static enum CRStatus cr_tknzr_parse_escape (CRTknzr * a_this,
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guint32 * a_esc_code,
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CRParsingLocation *a_location);
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static enum CRStatus cr_tknzr_parse_string (CRTknzr * a_this,
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CRString ** a_str);
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static enum CRStatus cr_tknzr_parse_comment (CRTknzr * a_this,
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CRString ** a_comment);
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static enum CRStatus cr_tknzr_parse_nmstart (CRTknzr * a_this,
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guint32 * a_char,
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CRParsingLocation *a_location);
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static enum CRStatus cr_tknzr_parse_num (CRTknzr * a_this,
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CRNum ** a_num);
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/**********************************
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*PRIVATE methods
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**********************************/
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/**
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*Parses a "w" as defined by the css spec at [4.1.1]:
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* w ::= [ \t\r\n\f]*
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*
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*@param a_this the current instance of #CRTknzr.
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*@param a_start out param. Upon successful completion, points
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*to the beginning of the parsed white space, points to NULL otherwise.
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*Can also point to NULL is there is no white space actually.
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*@param a_end out param. Upon successful completion, points
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*to the end of the parsed white space, points to NULL otherwise.
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*Can also point to NULL is there is no white space actually.
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*/
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static enum CRStatus
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cr_tknzr_parse_w (CRTknzr * a_this,
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guchar ** a_start,
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guchar ** a_end,
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CRParsingLocation *a_location)
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{
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guint32 cur_char = 0;
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CRInputPos init_pos;
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enum CRStatus status = CR_OK;
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g_return_val_if_fail (a_this && PRIVATE (a_this)
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&& PRIVATE (a_this)->input
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&& a_start && a_end,
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CR_BAD_PARAM_ERROR);
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RECORD_INITIAL_POS (a_this, &init_pos);
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*a_start = NULL;
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*a_end = NULL;
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READ_NEXT_CHAR (a_this, &cur_char);
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if (cr_utils_is_white_space (cur_char) == FALSE) {
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status = CR_PARSING_ERROR;
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goto error;
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}
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if (a_location) {
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cr_tknzr_get_parsing_location (a_this,
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a_location) ;
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}
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RECORD_CUR_BYTE_ADDR (a_this, a_start);
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*a_end = *a_start;
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for (;;) {
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gboolean is_eof = FALSE;
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cr_input_get_end_of_file (PRIVATE (a_this)->input, &is_eof);
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if (is_eof)
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break;
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status = cr_tknzr_peek_char (a_this, &cur_char);
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if (status == CR_END_OF_INPUT_ERROR) {
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break;
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} else if (status != CR_OK) {
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goto error;
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}
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if (cr_utils_is_white_space (cur_char) == TRUE) {
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READ_NEXT_CHAR (a_this, &cur_char);
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RECORD_CUR_BYTE_ADDR (a_this, a_end);
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} else {
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break;
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}
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}
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return CR_OK;
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error:
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cr_tknzr_set_cur_pos (a_this, &init_pos);
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return status;
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}
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/**
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*Parses a newline as defined in the css2 spec:
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* nl ::= \n|\r\n|\r|\f
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*
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*@param a_this the "this pointer" of the current instance of #CRTknzr.
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*@param a_start a pointer to the first character of the successfully
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*parsed string.
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*@param a_end a pointer to the last character of the successfully parsed
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*string.
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*@result CR_OK upon successful completion, an error code otherwise.
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*/
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static enum CRStatus
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cr_tknzr_parse_nl (CRTknzr * a_this,
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guchar ** a_start,
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guchar ** a_end,
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CRParsingLocation *a_location)
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{
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CRInputPos init_pos;
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guchar next_chars[2] = { 0 };
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enum CRStatus status = CR_PARSING_ERROR;
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g_return_val_if_fail (a_this && PRIVATE (a_this)
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&& a_start && a_end, CR_BAD_PARAM_ERROR);
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RECORD_INITIAL_POS (a_this, &init_pos);
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PEEK_BYTE (a_this, 1, &next_chars[0]);
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PEEK_BYTE (a_this, 2, &next_chars[1]);
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if ((next_chars[0] == '\r' && next_chars[1] == '\n')) {
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SKIP_BYTES (a_this, 1);
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if (a_location) {
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cr_tknzr_get_parsing_location
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(a_this, a_location) ;
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}
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SKIP_CHARS (a_this, 1);
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RECORD_CUR_BYTE_ADDR (a_this, a_end);
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status = CR_OK;
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} else if (next_chars[0] == '\n'
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|| next_chars[0] == '\r' || next_chars[0] == '\f') {
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SKIP_CHARS (a_this, 1);
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if (a_location) {
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cr_tknzr_get_parsing_location
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(a_this, a_location) ;
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}
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RECORD_CUR_BYTE_ADDR (a_this, a_start);
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*a_end = *a_start;
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status = CR_OK;
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} else {
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status = CR_PARSING_ERROR;
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goto error;
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}
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return CR_OK ;
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error:
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cr_tknzr_set_cur_pos (a_this, &init_pos) ;
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return status;
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}
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/**
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*Go ahead in the parser input, skipping all the spaces.
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*If the next char if not a white space, this function does nothing.
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*In any cases, it stops when it encounters a non white space character.
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*
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*@param a_this the current instance of #CRTknzr.
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*@return CR_OK upon successful completion, an error code otherwise.
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*/
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static enum CRStatus
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cr_tknzr_try_to_skip_spaces (CRTknzr * a_this)
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{
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enum CRStatus status = CR_ERROR;
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guint32 cur_char = 0;
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g_return_val_if_fail (a_this && PRIVATE (a_this)
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&& PRIVATE (a_this)->input, CR_BAD_PARAM_ERROR);
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status = cr_input_peek_char (PRIVATE (a_this)->input, &cur_char);
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if (status != CR_OK) {
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if (status == CR_END_OF_INPUT_ERROR)
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return CR_OK;
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return status;
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}
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if (cr_utils_is_white_space (cur_char) == TRUE) {
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gulong nb_chars = -1; /*consume all spaces */
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status = cr_input_consume_white_spaces
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(PRIVATE (a_this)->input, &nb_chars);
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}
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return status;
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}
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/**
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*Parses a "comment" as defined in the css spec at [4.1.1]:
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*COMMENT ::= \/\*[^*]*\*+([^/][^*]*\*+)*\/ .
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*This complex regexp is just to say that comments start
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*with the two chars '/''*' and ends with the two chars '*''/'.
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*It also means that comments cannot be nested.
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*So based on that, I've just tried to implement the parsing function
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*simply and in a straight forward manner.
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*/
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static enum CRStatus
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cr_tknzr_parse_comment (CRTknzr * a_this,
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CRString ** a_comment)
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{
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enum CRStatus status = CR_OK;
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CRInputPos init_pos;
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guint32 cur_char = 0, next_char= 0;
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CRString *comment = NULL;
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CRParsingLocation loc = {0} ;
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g_return_val_if_fail (a_this && PRIVATE (a_this)
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&& PRIVATE (a_this)->input,
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CR_BAD_PARAM_ERROR);
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RECORD_INITIAL_POS (a_this, &init_pos);
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READ_NEXT_CHAR (a_this, &cur_char) ;
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ENSURE_PARSING_COND (cur_char == '/');
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cr_tknzr_get_parsing_location (a_this, &loc) ;
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READ_NEXT_CHAR (a_this, &cur_char);
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ENSURE_PARSING_COND (cur_char == '*');
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comment = cr_string_new ();
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for (;;) { /* [^*]* */
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PEEK_NEXT_CHAR (a_this, &next_char);
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if (next_char == '*')
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break;
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READ_NEXT_CHAR (a_this, &cur_char);
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g_string_append_unichar (comment->stryng, cur_char);
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}
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/* Stop condition: next_char == '*' */
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for (;;) { /* \*+ */
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READ_NEXT_CHAR(a_this, &cur_char);
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ENSURE_PARSING_COND (cur_char == '*');
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g_string_append_unichar (comment->stryng, cur_char);
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PEEK_NEXT_CHAR (a_this, &next_char);
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if (next_char != '*')
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break;
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}
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/* Stop condition: next_char != '*' */
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for (;;) { /* ([^/][^*]*\*+)* */
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if (next_char == '/')
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break;
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READ_NEXT_CHAR(a_this, &cur_char);
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g_string_append_unichar (comment->stryng, cur_char);
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for (;;) { /* [^*]* */
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PEEK_NEXT_CHAR (a_this, &next_char);
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if (next_char == '*')
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break;
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READ_NEXT_CHAR (a_this, &cur_char);
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g_string_append_unichar (comment->stryng, cur_char);
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}
|
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/* Stop condition: next_char = '*', no need to verify, because peek and read exit to error anyway */
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for (;;) { /* \*+ */
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READ_NEXT_CHAR(a_this, &cur_char);
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ENSURE_PARSING_COND (cur_char == '*');
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g_string_append_unichar (comment->stryng, cur_char);
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PEEK_NEXT_CHAR (a_this, &next_char);
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if (next_char != '*')
|
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break;
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}
|
|
/* Continue condition: next_char != '*' */
|
|
}
|
|
/* Stop condition: next_char == '\/' */
|
|
READ_NEXT_CHAR(a_this, &cur_char);
|
|
g_string_append_unichar (comment->stryng, cur_char);
|
|
|
|
if (status == CR_OK) {
|
|
cr_parsing_location_copy (&comment->location,
|
|
&loc) ;
|
|
*a_comment = comment;
|
|
return CR_OK;
|
|
}
|
|
error:
|
|
|
|
if (comment) {
|
|
cr_string_destroy (comment);
|
|
comment = NULL;
|
|
}
|
|
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos);
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
*Parses an 'unicode' escape sequence defined
|
|
*in css spec at chap 4.1.1:
|
|
*unicode ::= \\[0-9a-f]{1,6}[ \n\r\t\f]?
|
|
*@param a_this the current instance of #CRTknzr.
|
|
*@param a_start out parameter. A pointer to the start
|
|
*of the unicode escape sequence. Must *NOT* be deleted by
|
|
*the caller.
|
|
*@param a_end out parameter. A pointer to the last character
|
|
*of the unicode escape sequence. Must *NOT* be deleted by the caller.
|
|
*@return CR_OK if parsing succeeded, an error code otherwise.
|
|
*Error code can be either CR_PARSING_ERROR if the string
|
|
*parsed just doesn't
|
|
*respect the production or another error if a
|
|
*lower level error occurred.
|
|
*/
|
|
static enum CRStatus
|
|
cr_tknzr_parse_unicode_escape (CRTknzr * a_this,
|
|
guint32 * a_unicode,
|
|
CRParsingLocation *a_location)
|
|
{
|
|
guint32 cur_char;
|
|
CRInputPos init_pos;
|
|
glong occur = 0;
|
|
guint32 unicode = 0;
|
|
guchar *tmp_char_ptr1 = NULL,
|
|
*tmp_char_ptr2 = NULL;
|
|
enum CRStatus status = CR_OK;
|
|
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& a_unicode, CR_BAD_PARAM_ERROR);
|
|
|
|
/*first, let's backup the current position pointer */
|
|
RECORD_INITIAL_POS (a_this, &init_pos);
|
|
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
|
|
if (cur_char != '\\') {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
if (a_location) {
|
|
cr_tknzr_get_parsing_location
|
|
(a_this, a_location) ;
|
|
}
|
|
PEEK_NEXT_CHAR (a_this, &cur_char);
|
|
|
|
for (occur = 0, unicode = 0; ((cur_char >= '0' && cur_char <= '9')
|
|
|| (cur_char >= 'a' && cur_char <= 'f')
|
|
|| (cur_char >= 'A' && cur_char <= 'F'))
|
|
&& occur < 6; occur++) {
|
|
gint cur_char_val = 0;
|
|
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
|
|
if ((cur_char >= '0' && cur_char <= '9')) {
|
|
cur_char_val = (cur_char - '0');
|
|
} else if ((cur_char >= 'a' && cur_char <= 'f')) {
|
|
cur_char_val = 10 + (cur_char - 'a');
|
|
} else if ((cur_char >= 'A' && cur_char <= 'F')) {
|
|
cur_char_val = 10 + (cur_char - 'A');
|
|
}
|
|
|
|
unicode = unicode * 16 + cur_char_val;
|
|
|
|
PEEK_NEXT_CHAR (a_this, &cur_char);
|
|
}
|
|
|
|
/* Eat a whitespace if possible. */
|
|
cr_tknzr_parse_w (a_this, &tmp_char_ptr1,
|
|
&tmp_char_ptr2, NULL);
|
|
*a_unicode = unicode;
|
|
return CR_OK;
|
|
|
|
error:
|
|
/*
|
|
*restore the initial position pointer backuped at
|
|
*the beginning of this function.
|
|
*/
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos);
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
*parses an escape sequence as defined by the css spec:
|
|
*escape ::= {unicode}|\\[ -~\200-\4177777]
|
|
*@param a_this the current instance of #CRTknzr .
|
|
*/
|
|
static enum CRStatus
|
|
cr_tknzr_parse_escape (CRTknzr * a_this, guint32 * a_esc_code,
|
|
CRParsingLocation *a_location)
|
|
{
|
|
enum CRStatus status = CR_OK;
|
|
guint32 cur_char = 0;
|
|
CRInputPos init_pos;
|
|
guchar next_chars[2];
|
|
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& a_esc_code, CR_BAD_PARAM_ERROR);
|
|
|
|
RECORD_INITIAL_POS (a_this, &init_pos);
|
|
|
|
PEEK_BYTE (a_this, 1, &next_chars[0]);
|
|
PEEK_BYTE (a_this, 2, &next_chars[1]);
|
|
|
|
if (next_chars[0] != '\\') {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
|
|
if ((next_chars[1] >= '0' && next_chars[1] <= '9')
|
|
|| (next_chars[1] >= 'a' && next_chars[1] <= 'f')
|
|
|| (next_chars[1] >= 'A' && next_chars[1] <= 'F')) {
|
|
status = cr_tknzr_parse_unicode_escape (a_this, a_esc_code,
|
|
a_location);
|
|
} else {
|
|
/*consume the '\' char */
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
if (a_location) {
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
a_location) ;
|
|
}
|
|
/*then read the char after the '\' */
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
|
|
if (cur_char != ' ' && (cur_char < 200 || cur_char > 4177777)) {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
*a_esc_code = cur_char;
|
|
|
|
}
|
|
if (status == CR_OK) {
|
|
return CR_OK;
|
|
}
|
|
error:
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos);
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
*Parses a string type as defined in css spec [4.1.1]:
|
|
*
|
|
*string ::= {string1}|{string2}
|
|
*string1 ::= \"([\t !#$%&(-~]|\\{nl}|\'|{nonascii}|{escape})*\"
|
|
*string2 ::= \'([\t !#$%&(-~]|\\{nl}|\"|{nonascii}|{escape})*\'
|
|
*
|
|
*@param a_this the current instance of #CRTknzr.
|
|
*@param a_start out parameter. Upon successful completion,
|
|
*points to the beginning of the string, points to an undefined value
|
|
*otherwise.
|
|
*@param a_end out parameter. Upon successful completion, points to
|
|
*the beginning of the string, points to an undefined value otherwise.
|
|
*@return CR_OK upon successful completion, an error code otherwise.
|
|
*/
|
|
static enum CRStatus
|
|
cr_tknzr_parse_string (CRTknzr * a_this, CRString ** a_str)
|
|
{
|
|
guint32 cur_char = 0,
|
|
delim = 0;
|
|
CRInputPos init_pos;
|
|
enum CRStatus status = CR_OK;
|
|
CRString *str = NULL;
|
|
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input
|
|
&& a_str, CR_BAD_PARAM_ERROR);
|
|
|
|
RECORD_INITIAL_POS (a_this, &init_pos);
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
|
|
if (cur_char == '"')
|
|
delim = '"';
|
|
else if (cur_char == '\'')
|
|
delim = '\'';
|
|
else {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
str = cr_string_new ();
|
|
if (str) {
|
|
cr_tknzr_get_parsing_location
|
|
(a_this, &str->location) ;
|
|
}
|
|
for (;;) {
|
|
guchar next_chars[2] = { 0 };
|
|
|
|
PEEK_BYTE (a_this, 1, &next_chars[0]);
|
|
PEEK_BYTE (a_this, 2, &next_chars[1]);
|
|
|
|
if (next_chars[0] == '\\') {
|
|
guchar *tmp_char_ptr1 = NULL,
|
|
*tmp_char_ptr2 = NULL;
|
|
guint32 esc_code = 0;
|
|
|
|
if (next_chars[1] == '\'' || next_chars[1] == '"') {
|
|
g_string_append_unichar (str->stryng,
|
|
next_chars[1]);
|
|
SKIP_BYTES (a_this, 2);
|
|
status = CR_OK;
|
|
} else {
|
|
status = cr_tknzr_parse_escape
|
|
(a_this, &esc_code, NULL);
|
|
|
|
if (status == CR_OK) {
|
|
g_string_append_unichar
|
|
(str->stryng,
|
|
esc_code);
|
|
}
|
|
}
|
|
|
|
if (status != CR_OK) {
|
|
/*
|
|
*consume the '\' char, and try to parse
|
|
*a newline.
|
|
*/
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
|
|
status = cr_tknzr_parse_nl
|
|
(a_this, &tmp_char_ptr1,
|
|
&tmp_char_ptr2, NULL);
|
|
}
|
|
|
|
CHECK_PARSING_STATUS (status, FALSE);
|
|
} else if (strchr ("\t !#$%&", next_chars[0])
|
|
|| (next_chars[0] >= '(' && next_chars[0] <= '~')) {
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
g_string_append_unichar (str->stryng,
|
|
cur_char);
|
|
status = CR_OK;
|
|
}
|
|
|
|
else if (cr_utils_is_nonascii (next_chars[0])) {
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
g_string_append_unichar (str->stryng, cur_char);
|
|
} else if (next_chars[0] == delim) {
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
break;
|
|
} else {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
if (status == CR_OK) {
|
|
if (*a_str == NULL) {
|
|
*a_str = str;
|
|
str = NULL;
|
|
} else {
|
|
(*a_str)->stryng = g_string_append_len
|
|
((*a_str)->stryng,
|
|
str->stryng->str,
|
|
str->stryng->len);
|
|
cr_string_destroy (str);
|
|
}
|
|
return CR_OK;
|
|
}
|
|
|
|
error:
|
|
|
|
if (str) {
|
|
cr_string_destroy (str) ;
|
|
str = NULL;
|
|
}
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos);
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
*Parses the an nmstart as defined by the css2 spec [4.1.1]:
|
|
* nmstart [a-zA-Z]|{nonascii}|{escape}
|
|
*
|
|
*@param a_this the current instance of #CRTknzr.
|
|
*@param a_start out param. A pointer to the starting point of
|
|
*the token.
|
|
*@param a_end out param. A pointer to the ending point of the
|
|
*token.
|
|
*@param a_char out param. The actual parsed nmchar.
|
|
*@return CR_OK upon successful completion,
|
|
*an error code otherwise.
|
|
*/
|
|
static enum CRStatus
|
|
cr_tknzr_parse_nmstart (CRTknzr * a_this,
|
|
guint32 * a_char,
|
|
CRParsingLocation *a_location)
|
|
{
|
|
CRInputPos init_pos;
|
|
enum CRStatus status = CR_OK;
|
|
guint32 cur_char = 0,
|
|
next_char = 0;
|
|
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input
|
|
&& a_char, CR_BAD_PARAM_ERROR);
|
|
|
|
RECORD_INITIAL_POS (a_this, &init_pos);
|
|
|
|
PEEK_NEXT_CHAR (a_this, &next_char);
|
|
|
|
if (next_char == '\\') {
|
|
status = cr_tknzr_parse_escape (a_this, a_char,
|
|
a_location);
|
|
|
|
if (status != CR_OK)
|
|
goto error;
|
|
|
|
} else if (cr_utils_is_nonascii (next_char) == TRUE
|
|
|| ((next_char >= 'a') && (next_char <= 'z'))
|
|
|| ((next_char >= 'A') && (next_char <= 'Z'))
|
|
) {
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
if (a_location) {
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
a_location) ;
|
|
}
|
|
*a_char = cur_char;
|
|
status = CR_OK;
|
|
} else {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
|
|
return CR_OK;
|
|
|
|
error:
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos);
|
|
|
|
return status;
|
|
|
|
}
|
|
|
|
/**
|
|
*Parses an nmchar as described in the css spec at
|
|
*chap 4.1.1:
|
|
*nmchar ::= [a-z0-9-]|{nonascii}|{escape}
|
|
*
|
|
*Humm, I have added the possibility for nmchar to
|
|
*contain upper case letters.
|
|
*
|
|
*@param a_this the current instance of #CRTknzr.
|
|
*@param a_start out param. A pointer to the starting point of
|
|
*the token.
|
|
*@param a_end out param. A pointer to the ending point of the
|
|
*token.
|
|
*@param a_char out param. The actual parsed nmchar.
|
|
*@return CR_OK upon successful completion,
|
|
*an error code otherwise.
|
|
*/
|
|
static enum CRStatus
|
|
cr_tknzr_parse_nmchar (CRTknzr * a_this, guint32 * a_char,
|
|
CRParsingLocation *a_location)
|
|
{
|
|
guint32 cur_char = 0,
|
|
next_char = 0;
|
|
enum CRStatus status = CR_OK;
|
|
CRInputPos init_pos;
|
|
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this) && a_char,
|
|
CR_BAD_PARAM_ERROR);
|
|
|
|
RECORD_INITIAL_POS (a_this, &init_pos);
|
|
|
|
status = cr_input_peek_char (PRIVATE (a_this)->input,
|
|
&next_char) ;
|
|
if (status != CR_OK)
|
|
goto error;
|
|
|
|
if (next_char == '\\') {
|
|
status = cr_tknzr_parse_escape (a_this, a_char,
|
|
a_location);
|
|
|
|
if (status != CR_OK)
|
|
goto error;
|
|
|
|
} else if (cr_utils_is_nonascii (next_char) == TRUE
|
|
|| ((next_char >= 'a') && (next_char <= 'z'))
|
|
|| ((next_char >= 'A') && (next_char <= 'Z'))
|
|
|| ((next_char >= '0') && (next_char <= '9'))
|
|
|| (next_char == '-')
|
|
|| (next_char == '_') /*'_' not allowed by the spec. */
|
|
) {
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
*a_char = cur_char;
|
|
status = CR_OK;
|
|
if (a_location) {
|
|
cr_tknzr_get_parsing_location
|
|
(a_this, a_location) ;
|
|
}
|
|
} else {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
return CR_OK;
|
|
|
|
error:
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos);
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
*Parses an "ident" as defined in css spec [4.1.1]:
|
|
*ident ::= {nmstart}{nmchar}*
|
|
*
|
|
*Actually parses it using the css3 grammar:
|
|
*ident ::= -?{nmstart}{nmchar}*
|
|
*@param a_this the currens instance of #CRTknzr.
|
|
*
|
|
*@param a_str a pointer to parsed ident. If *a_str is NULL,
|
|
*this function allocates a new instance of CRString. If not,
|
|
*the function just appends the parsed string to the one passed.
|
|
*In both cases it is up to the caller to free *a_str.
|
|
*
|
|
*@return CR_OK upon successful completion, an error code
|
|
*otherwise.
|
|
*/
|
|
static enum CRStatus
|
|
cr_tknzr_parse_ident (CRTknzr * a_this, CRString ** a_str)
|
|
{
|
|
guint32 tmp_char = 0;
|
|
CRString *stringue = NULL ;
|
|
CRInputPos init_pos;
|
|
enum CRStatus status = CR_OK;
|
|
gboolean location_is_set = FALSE ;
|
|
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input
|
|
&& a_str, CR_BAD_PARAM_ERROR);
|
|
|
|
RECORD_INITIAL_POS (a_this, &init_pos);
|
|
PEEK_NEXT_CHAR (a_this, &tmp_char) ;
|
|
stringue = cr_string_new () ;
|
|
g_return_val_if_fail (stringue,
|
|
CR_OUT_OF_MEMORY_ERROR) ;
|
|
|
|
if (tmp_char == '-') {
|
|
READ_NEXT_CHAR (a_this, &tmp_char) ;
|
|
cr_tknzr_get_parsing_location
|
|
(a_this, &stringue->location) ;
|
|
location_is_set = TRUE ;
|
|
g_string_append_unichar (stringue->stryng,
|
|
tmp_char) ;
|
|
}
|
|
status = cr_tknzr_parse_nmstart (a_this, &tmp_char, NULL);
|
|
if (status != CR_OK) {
|
|
status = CR_PARSING_ERROR;
|
|
goto end ;
|
|
}
|
|
if (location_is_set == FALSE) {
|
|
cr_tknzr_get_parsing_location
|
|
(a_this, &stringue->location) ;
|
|
location_is_set = TRUE ;
|
|
}
|
|
g_string_append_unichar (stringue->stryng, tmp_char);
|
|
for (;;) {
|
|
status = cr_tknzr_parse_nmchar (a_this,
|
|
&tmp_char,
|
|
NULL);
|
|
if (status != CR_OK) {
|
|
status = CR_OK ;
|
|
break;
|
|
}
|
|
g_string_append_unichar (stringue->stryng, tmp_char);
|
|
}
|
|
if (status == CR_OK) {
|
|
if (!*a_str) {
|
|
*a_str = stringue ;
|
|
|
|
} else {
|
|
g_string_append_len ((*a_str)->stryng,
|
|
stringue->stryng->str,
|
|
stringue->stryng->len) ;
|
|
cr_string_destroy (stringue) ;
|
|
}
|
|
stringue = NULL ;
|
|
}
|
|
|
|
error:
|
|
end:
|
|
if (stringue) {
|
|
cr_string_destroy (stringue) ;
|
|
stringue = NULL ;
|
|
}
|
|
if (status != CR_OK ) {
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos) ;
|
|
}
|
|
return status ;
|
|
}
|
|
|
|
|
|
/**
|
|
*Parses a "name" as defined by css spec [4.1.1]:
|
|
*name ::= {nmchar}+
|
|
*
|
|
*@param a_this the current instance of #CRTknzr.
|
|
*
|
|
*@param a_str out parameter. A pointer to the successfully parsed
|
|
*name. If *a_str is set to NULL, this function allocates a new instance
|
|
*of CRString. If not, it just appends the parsed name to the passed *a_str.
|
|
*In both cases, it is up to the caller to free *a_str.
|
|
*
|
|
*@return CR_OK upon successful completion, an error code otherwise.
|
|
*/
|
|
static enum CRStatus
|
|
cr_tknzr_parse_name (CRTknzr * a_this,
|
|
CRString ** a_str)
|
|
{
|
|
guint32 tmp_char = 0;
|
|
CRInputPos init_pos;
|
|
enum CRStatus status = CR_OK;
|
|
gboolean str_needs_free = FALSE,
|
|
is_first_nmchar=TRUE ;
|
|
glong i = 0;
|
|
CRParsingLocation loc = {0} ;
|
|
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input
|
|
&& a_str,
|
|
CR_BAD_PARAM_ERROR) ;
|
|
|
|
RECORD_INITIAL_POS (a_this, &init_pos);
|
|
|
|
if (*a_str == NULL) {
|
|
*a_str = cr_string_new ();
|
|
str_needs_free = TRUE;
|
|
}
|
|
for (i = 0;; i++) {
|
|
if (is_first_nmchar == TRUE) {
|
|
status = cr_tknzr_parse_nmchar
|
|
(a_this, &tmp_char,
|
|
&loc) ;
|
|
is_first_nmchar = FALSE ;
|
|
} else {
|
|
status = cr_tknzr_parse_nmchar
|
|
(a_this, &tmp_char, NULL) ;
|
|
}
|
|
if (status != CR_OK)
|
|
break;
|
|
g_string_append_unichar ((*a_str)->stryng,
|
|
tmp_char);
|
|
}
|
|
if (i > 0) {
|
|
cr_parsing_location_copy
|
|
(&(*a_str)->location, &loc) ;
|
|
return CR_OK;
|
|
}
|
|
if (str_needs_free == TRUE && *a_str) {
|
|
cr_string_destroy (*a_str);
|
|
*a_str = NULL;
|
|
}
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos);
|
|
return CR_PARSING_ERROR;
|
|
}
|
|
|
|
/**
|
|
*Parses a "hash" as defined by the css spec in [4.1.1]:
|
|
*HASH ::= #{name}
|
|
*/
|
|
static enum CRStatus
|
|
cr_tknzr_parse_hash (CRTknzr * a_this, CRString ** a_str)
|
|
{
|
|
guint32 cur_char = 0;
|
|
CRInputPos init_pos;
|
|
enum CRStatus status = CR_OK;
|
|
gboolean str_needs_free = FALSE;
|
|
CRParsingLocation loc = {0} ;
|
|
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input,
|
|
CR_BAD_PARAM_ERROR);
|
|
|
|
RECORD_INITIAL_POS (a_this, &init_pos);
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
if (cur_char != '#') {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
if (*a_str == NULL) {
|
|
*a_str = cr_string_new ();
|
|
str_needs_free = TRUE;
|
|
}
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&loc) ;
|
|
status = cr_tknzr_parse_name (a_this, a_str);
|
|
cr_parsing_location_copy (&(*a_str)->location, &loc) ;
|
|
if (status != CR_OK) {
|
|
goto error;
|
|
}
|
|
return CR_OK;
|
|
|
|
error:
|
|
if (str_needs_free == TRUE && *a_str) {
|
|
cr_string_destroy (*a_str);
|
|
*a_str = NULL;
|
|
}
|
|
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos);
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
*Parses an uri as defined by the css spec [4.1.1]:
|
|
* URI ::= url\({w}{string}{w}\)
|
|
* |url\({w}([!#$%&*-~]|{nonascii}|{escape})*{w}\)
|
|
*
|
|
*@param a_this the current instance of #CRTknzr.
|
|
*@param a_str the successfully parsed url.
|
|
*@return CR_OK upon successful completion, an error code otherwise.
|
|
*/
|
|
static enum CRStatus
|
|
cr_tknzr_parse_uri (CRTknzr * a_this,
|
|
CRString ** a_str)
|
|
{
|
|
guint32 cur_char = 0;
|
|
CRInputPos init_pos;
|
|
enum CRStatus status = CR_PARSING_ERROR;
|
|
guchar tab[4] = { 0 }, *tmp_ptr1 = NULL, *tmp_ptr2 = NULL;
|
|
CRString *str = NULL;
|
|
CRParsingLocation location = {0} ;
|
|
|
|
g_return_val_if_fail (a_this
|
|
&& PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input
|
|
&& a_str,
|
|
CR_BAD_PARAM_ERROR);
|
|
|
|
RECORD_INITIAL_POS (a_this, &init_pos);
|
|
|
|
PEEK_BYTE (a_this, 1, &tab[0]);
|
|
PEEK_BYTE (a_this, 2, &tab[1]);
|
|
PEEK_BYTE (a_this, 3, &tab[2]);
|
|
PEEK_BYTE (a_this, 4, &tab[3]);
|
|
|
|
if (tab[0] != 'u' || tab[1] != 'r' || tab[2] != 'l' || tab[3] != '(') {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
/*
|
|
*Here, we want to skip 4 bytes ('u''r''l''(').
|
|
*But we also need to keep track of the parsing location
|
|
*of the 'u'. So, we skip 1 byte, we record the parsing
|
|
*location, then we skip the 3 remaining bytes.
|
|
*/
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this, &location) ;
|
|
SKIP_CHARS (a_this, 3);
|
|
cr_tknzr_try_to_skip_spaces (a_this);
|
|
status = cr_tknzr_parse_string (a_this, a_str);
|
|
|
|
if (status == CR_OK) {
|
|
guint32 next_char = 0;
|
|
status = cr_tknzr_parse_w (a_this, &tmp_ptr1,
|
|
&tmp_ptr2, NULL);
|
|
cr_tknzr_try_to_skip_spaces (a_this);
|
|
PEEK_NEXT_CHAR (a_this, &next_char);
|
|
if (next_char == ')') {
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
status = CR_OK;
|
|
} else {
|
|
status = CR_PARSING_ERROR;
|
|
}
|
|
}
|
|
if (status != CR_OK) {
|
|
str = cr_string_new ();
|
|
for (;;) {
|
|
guint32 next_char = 0;
|
|
PEEK_NEXT_CHAR (a_this, &next_char);
|
|
if (strchr ("!#$%&", next_char)
|
|
|| (next_char >= '*' && next_char <= '~')
|
|
|| (cr_utils_is_nonascii (next_char) == TRUE)) {
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
g_string_append_unichar
|
|
(str->stryng, cur_char);
|
|
status = CR_OK;
|
|
} else {
|
|
guint32 esc_code = 0;
|
|
status = cr_tknzr_parse_escape
|
|
(a_this, &esc_code, NULL);
|
|
if (status == CR_OK) {
|
|
g_string_append_unichar
|
|
(str->stryng,
|
|
esc_code);
|
|
} else {
|
|
status = CR_OK;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
cr_tknzr_try_to_skip_spaces (a_this);
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
if (cur_char == ')') {
|
|
status = CR_OK;
|
|
} else {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
if (str) {
|
|
if (*a_str == NULL) {
|
|
*a_str = str;
|
|
str = NULL;
|
|
} else {
|
|
g_string_append_len
|
|
((*a_str)->stryng,
|
|
str->stryng->str,
|
|
str->stryng->len);
|
|
cr_string_destroy (str);
|
|
}
|
|
}
|
|
}
|
|
|
|
cr_parsing_location_copy
|
|
(&(*a_str)->location,
|
|
&location) ;
|
|
return CR_OK ;
|
|
error:
|
|
if (str) {
|
|
cr_string_destroy (str);
|
|
str = NULL;
|
|
}
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos);
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
*parses an RGB as defined in the css2 spec.
|
|
*rgb: rgb '('S*{num}%?S* ',' {num}#?S*,S*{num}#?S*')'
|
|
*
|
|
*@param a_this the "this pointer" of the current instance of
|
|
*@param a_rgb out parameter the parsed rgb.
|
|
*@return CR_OK upon successful completion, an error code otherwise.
|
|
*/
|
|
static enum CRStatus
|
|
cr_tknzr_parse_rgb (CRTknzr * a_this, CRRgb ** a_rgb)
|
|
{
|
|
enum CRStatus status = CR_OK;
|
|
CRInputPos init_pos;
|
|
CRNum *num = NULL;
|
|
guchar next_bytes[3] = { 0 }, cur_byte = 0;
|
|
glong red = 0,
|
|
green = 0,
|
|
blue = 0,
|
|
i = 0;
|
|
gboolean is_percentage = FALSE;
|
|
CRParsingLocation location = {0} ;
|
|
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
|
|
|
|
RECORD_INITIAL_POS (a_this, &init_pos);
|
|
|
|
PEEK_BYTE (a_this, 1, &next_bytes[0]);
|
|
PEEK_BYTE (a_this, 2, &next_bytes[1]);
|
|
PEEK_BYTE (a_this, 3, &next_bytes[2]);
|
|
|
|
if (((next_bytes[0] == 'r') || (next_bytes[0] == 'R'))
|
|
&& ((next_bytes[1] == 'g') || (next_bytes[1] == 'G'))
|
|
&& ((next_bytes[2] == 'b') || (next_bytes[2] == 'B'))) {
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this, &location) ;
|
|
SKIP_CHARS (a_this, 2);
|
|
} else {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
READ_NEXT_BYTE (a_this, &cur_byte);
|
|
ENSURE_PARSING_COND (cur_byte == '(');
|
|
|
|
cr_tknzr_try_to_skip_spaces (a_this);
|
|
status = cr_tknzr_parse_num (a_this, &num);
|
|
ENSURE_PARSING_COND ((status == CR_OK) && (num != NULL));
|
|
|
|
if (num->val > G_MAXLONG) {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
|
|
red = num->val;
|
|
cr_num_destroy (num);
|
|
num = NULL;
|
|
|
|
PEEK_BYTE (a_this, 1, &next_bytes[0]);
|
|
if (next_bytes[0] == '%') {
|
|
SKIP_CHARS (a_this, 1);
|
|
is_percentage = TRUE;
|
|
}
|
|
cr_tknzr_try_to_skip_spaces (a_this);
|
|
|
|
for (i = 0; i < 2; i++) {
|
|
READ_NEXT_BYTE (a_this, &cur_byte);
|
|
ENSURE_PARSING_COND (cur_byte == ',');
|
|
|
|
cr_tknzr_try_to_skip_spaces (a_this);
|
|
status = cr_tknzr_parse_num (a_this, &num);
|
|
ENSURE_PARSING_COND ((status == CR_OK) && (num != NULL));
|
|
|
|
if (num->val > G_MAXLONG) {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
|
|
PEEK_BYTE (a_this, 1, &next_bytes[0]);
|
|
if (next_bytes[0] == '%') {
|
|
SKIP_CHARS (a_this, 1);
|
|
is_percentage = 1;
|
|
}
|
|
|
|
if (i == 0) {
|
|
green = num->val;
|
|
} else if (i == 1) {
|
|
blue = num->val;
|
|
}
|
|
|
|
if (num) {
|
|
cr_num_destroy (num);
|
|
num = NULL;
|
|
}
|
|
cr_tknzr_try_to_skip_spaces (a_this);
|
|
}
|
|
|
|
READ_NEXT_BYTE (a_this, &cur_byte);
|
|
if (*a_rgb == NULL) {
|
|
*a_rgb = cr_rgb_new_with_vals (red, green, blue,
|
|
is_percentage);
|
|
|
|
if (*a_rgb == NULL) {
|
|
status = CR_ERROR;
|
|
goto error;
|
|
}
|
|
status = CR_OK;
|
|
} else {
|
|
(*a_rgb)->red = red;
|
|
(*a_rgb)->green = green;
|
|
(*a_rgb)->blue = blue;
|
|
(*a_rgb)->is_percentage = is_percentage;
|
|
|
|
status = CR_OK;
|
|
}
|
|
|
|
if (status == CR_OK) {
|
|
if (a_rgb && *a_rgb) {
|
|
cr_parsing_location_copy
|
|
(&(*a_rgb)->location,
|
|
&location) ;
|
|
}
|
|
return CR_OK;
|
|
}
|
|
|
|
error:
|
|
if (num) {
|
|
cr_num_destroy (num);
|
|
num = NULL;
|
|
}
|
|
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos);
|
|
return CR_OK;
|
|
}
|
|
|
|
/**
|
|
*Parses a atkeyword as defined by the css spec in [4.1.1]:
|
|
*ATKEYWORD ::= @{ident}
|
|
*
|
|
*@param a_this the "this pointer" of the current instance of
|
|
*#CRTknzr.
|
|
*
|
|
*@param a_str out parameter. The parsed atkeyword. If *a_str is
|
|
*set to NULL this function allocates a new instance of CRString and
|
|
*sets it to the parsed atkeyword. If not, this function just appends
|
|
*the parsed atkeyword to the end of *a_str. In both cases it is up to
|
|
*the caller to free *a_str.
|
|
*
|
|
*@return CR_OK upon successful completion, an error code otherwise.
|
|
*/
|
|
static enum CRStatus
|
|
cr_tknzr_parse_atkeyword (CRTknzr * a_this,
|
|
CRString ** a_str)
|
|
{
|
|
guint32 cur_char = 0;
|
|
CRInputPos init_pos;
|
|
gboolean str_needs_free = FALSE;
|
|
enum CRStatus status = CR_OK;
|
|
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input
|
|
&& a_str, CR_BAD_PARAM_ERROR);
|
|
|
|
RECORD_INITIAL_POS (a_this, &init_pos);
|
|
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
|
|
if (cur_char != '@') {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
|
|
if (*a_str == NULL) {
|
|
*a_str = cr_string_new ();
|
|
str_needs_free = TRUE;
|
|
}
|
|
status = cr_tknzr_parse_ident (a_this, a_str);
|
|
if (status != CR_OK) {
|
|
goto error;
|
|
}
|
|
return CR_OK;
|
|
error:
|
|
|
|
if (str_needs_free == TRUE && *a_str) {
|
|
cr_string_destroy (*a_str);
|
|
*a_str = NULL;
|
|
}
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos);
|
|
return status;
|
|
}
|
|
|
|
static enum CRStatus
|
|
cr_tknzr_parse_important (CRTknzr * a_this,
|
|
CRParsingLocation *a_location)
|
|
{
|
|
guint32 cur_char = 0;
|
|
CRInputPos init_pos;
|
|
enum CRStatus status = CR_OK;
|
|
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input,
|
|
CR_BAD_PARAM_ERROR);
|
|
|
|
RECORD_INITIAL_POS (a_this, &init_pos);
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
ENSURE_PARSING_COND (cur_char == '!');
|
|
if (a_location) {
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
a_location) ;
|
|
}
|
|
cr_tknzr_try_to_skip_spaces (a_this);
|
|
|
|
if (BYTE (PRIVATE (a_this)->input, 1, NULL) == 'i'
|
|
&& BYTE (PRIVATE (a_this)->input, 2, NULL) == 'm'
|
|
&& BYTE (PRIVATE (a_this)->input, 3, NULL) == 'p'
|
|
&& BYTE (PRIVATE (a_this)->input, 4, NULL) == 'o'
|
|
&& BYTE (PRIVATE (a_this)->input, 5, NULL) == 'r'
|
|
&& BYTE (PRIVATE (a_this)->input, 6, NULL) == 't'
|
|
&& BYTE (PRIVATE (a_this)->input, 7, NULL) == 'a'
|
|
&& BYTE (PRIVATE (a_this)->input, 8, NULL) == 'n'
|
|
&& BYTE (PRIVATE (a_this)->input, 9, NULL) == 't') {
|
|
SKIP_BYTES (a_this, 9);
|
|
if (a_location) {
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
a_location) ;
|
|
}
|
|
return CR_OK;
|
|
} else {
|
|
status = CR_PARSING_ERROR;
|
|
}
|
|
|
|
error:
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos);
|
|
|
|
return status;
|
|
}
|
|
|
|
/**
|
|
*Parses a num as defined in the css spec [4.1.1]:
|
|
*[0-9]+|[0-9]*\.[0-9]+
|
|
*@param a_this the current instance of #CRTknzr.
|
|
*@param a_num out parameter. The parsed number.
|
|
*@return CR_OK upon successful completion,
|
|
*an error code otherwise.
|
|
*
|
|
*The CSS specification says that numbers may be
|
|
*preceded by '+' or '-' to indicate the sign.
|
|
*Technically, the "num" construction as defined
|
|
*by the tokenizer doesn't allow this, but we parse
|
|
*it here for simplicity.
|
|
*/
|
|
static enum CRStatus
|
|
cr_tknzr_parse_num (CRTknzr * a_this,
|
|
CRNum ** a_num)
|
|
{
|
|
enum CRStatus status = CR_PARSING_ERROR;
|
|
enum CRNumType val_type = NUM_GENERIC;
|
|
gboolean parsing_dec, /* true iff seen decimal point. */
|
|
parsed; /* true iff the substring seen so far is a valid CSS
|
|
number, i.e. `[0-9]+|[0-9]*\.[0-9]+'. */
|
|
guint32 cur_char = 0,
|
|
next_char = 0;
|
|
gdouble numerator, denominator = 1;
|
|
CRInputPos init_pos;
|
|
CRParsingLocation location = {0} ;
|
|
int sign = 1;
|
|
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input,
|
|
CR_BAD_PARAM_ERROR);
|
|
|
|
RECORD_INITIAL_POS (a_this, &init_pos);
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
|
|
if (cur_char == '+' || cur_char == '-') {
|
|
if (cur_char == '-') {
|
|
sign = -1;
|
|
}
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
}
|
|
|
|
if (IS_NUM (cur_char)) {
|
|
numerator = (cur_char - '0');
|
|
parsing_dec = FALSE;
|
|
parsed = TRUE;
|
|
} else if (cur_char == '.') {
|
|
numerator = 0;
|
|
parsing_dec = TRUE;
|
|
parsed = FALSE;
|
|
} else {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
cr_tknzr_get_parsing_location (a_this, &location) ;
|
|
|
|
for (;;) {
|
|
status = cr_tknzr_peek_char (a_this, &next_char);
|
|
if (status != CR_OK) {
|
|
if (status == CR_END_OF_INPUT_ERROR)
|
|
status = CR_OK;
|
|
break;
|
|
}
|
|
if (next_char == '.') {
|
|
if (parsing_dec) {
|
|
status = CR_PARSING_ERROR;
|
|
goto error;
|
|
}
|
|
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
parsing_dec = TRUE;
|
|
parsed = FALSE; /* In CSS, there must be at least
|
|
one digit after `.'. */
|
|
} else if (IS_NUM (next_char)) {
|
|
READ_NEXT_CHAR (a_this, &cur_char);
|
|
parsed = TRUE;
|
|
|
|
numerator = numerator * 10 + (cur_char - '0');
|
|
if (parsing_dec) {
|
|
denominator *= 10;
|
|
}
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (!parsed) {
|
|
status = CR_PARSING_ERROR;
|
|
}
|
|
|
|
/*
|
|
*Now, set the output param values.
|
|
*/
|
|
if (status == CR_OK) {
|
|
gdouble val = (numerator / denominator) * sign;
|
|
if (*a_num == NULL) {
|
|
*a_num = cr_num_new_with_val (val, val_type);
|
|
|
|
if (*a_num == NULL) {
|
|
status = CR_ERROR;
|
|
goto error;
|
|
}
|
|
} else {
|
|
(*a_num)->val = val;
|
|
(*a_num)->type = val_type;
|
|
}
|
|
cr_parsing_location_copy (&(*a_num)->location,
|
|
&location) ;
|
|
return CR_OK;
|
|
}
|
|
|
|
error:
|
|
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos);
|
|
|
|
return status;
|
|
}
|
|
|
|
/*********************************************
|
|
*PUBLIC methods
|
|
********************************************/
|
|
|
|
CRTknzr *
|
|
cr_tknzr_new (CRInput * a_input)
|
|
{
|
|
CRTknzr *result = NULL;
|
|
|
|
result = g_try_malloc (sizeof (CRTknzr));
|
|
|
|
if (result == NULL) {
|
|
cr_utils_trace_info ("Out of memory");
|
|
return NULL;
|
|
}
|
|
|
|
memset (result, 0, sizeof (CRTknzr));
|
|
|
|
result->priv = g_try_malloc (sizeof (CRTknzrPriv));
|
|
|
|
if (result->priv == NULL) {
|
|
cr_utils_trace_info ("Out of memory");
|
|
|
|
if (result) {
|
|
g_free (result);
|
|
result = NULL;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
memset (result->priv, 0, sizeof (CRTknzrPriv));
|
|
if (a_input)
|
|
cr_tknzr_set_input (result, a_input);
|
|
return result;
|
|
}
|
|
|
|
CRTknzr *
|
|
cr_tknzr_new_from_buf (guchar * a_buf, gulong a_len,
|
|
enum CREncoding a_enc,
|
|
gboolean a_free_at_destroy)
|
|
{
|
|
CRTknzr *result = NULL;
|
|
CRInput *input = NULL;
|
|
|
|
input = cr_input_new_from_buf (a_buf, a_len, a_enc,
|
|
a_free_at_destroy);
|
|
|
|
g_return_val_if_fail (input != NULL, NULL);
|
|
|
|
result = cr_tknzr_new (input);
|
|
|
|
return result;
|
|
}
|
|
|
|
CRTknzr *
|
|
cr_tknzr_new_from_uri (const guchar * a_file_uri,
|
|
enum CREncoding a_enc)
|
|
{
|
|
CRTknzr *result = NULL;
|
|
CRInput *input = NULL;
|
|
|
|
input = cr_input_new_from_uri ((const gchar *) a_file_uri, a_enc);
|
|
g_return_val_if_fail (input != NULL, NULL);
|
|
|
|
result = cr_tknzr_new (input);
|
|
|
|
return result;
|
|
}
|
|
|
|
void
|
|
cr_tknzr_ref (CRTknzr * a_this)
|
|
{
|
|
g_return_if_fail (a_this && PRIVATE (a_this));
|
|
|
|
PRIVATE (a_this)->ref_count++;
|
|
}
|
|
|
|
gboolean
|
|
cr_tknzr_unref (CRTknzr * a_this)
|
|
{
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this), FALSE);
|
|
|
|
if (PRIVATE (a_this)->ref_count > 0) {
|
|
PRIVATE (a_this)->ref_count--;
|
|
}
|
|
|
|
if (PRIVATE (a_this)->ref_count == 0) {
|
|
cr_tknzr_destroy (a_this);
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
enum CRStatus
|
|
cr_tknzr_set_input (CRTknzr * a_this, CRInput * a_input)
|
|
{
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
|
|
|
|
if (PRIVATE (a_this)->input) {
|
|
cr_input_unref (PRIVATE (a_this)->input);
|
|
}
|
|
|
|
PRIVATE (a_this)->input = a_input;
|
|
|
|
cr_input_ref (PRIVATE (a_this)->input);
|
|
|
|
return CR_OK;
|
|
}
|
|
|
|
enum CRStatus
|
|
cr_tknzr_get_input (CRTknzr * a_this, CRInput ** a_input)
|
|
{
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
|
|
|
|
*a_input = PRIVATE (a_this)->input;
|
|
|
|
return CR_OK;
|
|
}
|
|
|
|
/*********************************
|
|
*Tokenizer input handling routines
|
|
*********************************/
|
|
|
|
/**
|
|
*Reads the next byte from the parser input stream.
|
|
*@param a_this the "this pointer" of the current instance of
|
|
*#CRParser.
|
|
*@param a_byte out parameter the place where to store the byte
|
|
*read.
|
|
*@return CR_OK upon successful completion, an error
|
|
*code otherwise.
|
|
*/
|
|
enum CRStatus
|
|
cr_tknzr_read_byte (CRTknzr * a_this, guchar * a_byte)
|
|
{
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this), CR_BAD_PARAM_ERROR);
|
|
|
|
return cr_input_read_byte (PRIVATE (a_this)->input, a_byte);
|
|
|
|
}
|
|
|
|
/**
|
|
*Reads the next char from the parser input stream.
|
|
*@param a_this the current instance of #CRTknzr.
|
|
*@param a_char out parameter. The read char.
|
|
*@return CR_OK upon successful completion, an error code
|
|
*otherwise.
|
|
*/
|
|
enum CRStatus
|
|
cr_tknzr_read_char (CRTknzr * a_this, guint32 * a_char)
|
|
{
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input
|
|
&& a_char, CR_BAD_PARAM_ERROR);
|
|
|
|
if (PRIVATE (a_this)->token_cache) {
|
|
cr_input_set_cur_pos (PRIVATE (a_this)->input,
|
|
&PRIVATE (a_this)->prev_pos);
|
|
cr_token_destroy (PRIVATE (a_this)->token_cache);
|
|
PRIVATE (a_this)->token_cache = NULL;
|
|
}
|
|
|
|
return cr_input_read_char (PRIVATE (a_this)->input, a_char);
|
|
}
|
|
|
|
/**
|
|
*Peeks a char from the parser input stream.
|
|
*To "peek a char" means reads the next char without consuming it.
|
|
*Subsequent calls to this function return the same char.
|
|
*@param a_this the current instance of #CRTknzr.
|
|
*@param a_char out parameter. The peeked char upon successful completion.
|
|
*@return CR_OK upon successful completion, an error code otherwise.
|
|
*/
|
|
enum CRStatus
|
|
cr_tknzr_peek_char (CRTknzr * a_this, guint32 * a_char)
|
|
{
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input
|
|
&& a_char, CR_BAD_PARAM_ERROR);
|
|
|
|
if (PRIVATE (a_this)->token_cache) {
|
|
cr_input_set_cur_pos (PRIVATE (a_this)->input,
|
|
&PRIVATE (a_this)->prev_pos);
|
|
cr_token_destroy (PRIVATE (a_this)->token_cache);
|
|
PRIVATE (a_this)->token_cache = NULL;
|
|
}
|
|
|
|
return cr_input_peek_char (PRIVATE (a_this)->input, a_char);
|
|
}
|
|
|
|
/**
|
|
*Peeks a byte ahead at a given position in the parser input stream.
|
|
*@param a_this the current instance of #CRTknzr.
|
|
*@param a_offset the offset of the peeked byte starting from the current
|
|
*byte in the parser input stream.
|
|
*@param a_byte out parameter. The peeked byte upon
|
|
*successful completion.
|
|
*@return CR_OK upon successful completion, an error code otherwise.
|
|
*/
|
|
enum CRStatus
|
|
cr_tknzr_peek_byte (CRTknzr * a_this, gulong a_offset, guchar * a_byte)
|
|
{
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input && a_byte,
|
|
CR_BAD_PARAM_ERROR);
|
|
|
|
if (PRIVATE (a_this)->token_cache) {
|
|
cr_input_set_cur_pos (PRIVATE (a_this)->input,
|
|
&PRIVATE (a_this)->prev_pos);
|
|
cr_token_destroy (PRIVATE (a_this)->token_cache);
|
|
PRIVATE (a_this)->token_cache = NULL;
|
|
}
|
|
|
|
return cr_input_peek_byte (PRIVATE (a_this)->input,
|
|
CR_SEEK_CUR, a_offset, a_byte);
|
|
}
|
|
|
|
/**
|
|
*Same as cr_tknzr_peek_byte() but this api returns the byte peeked.
|
|
*@param a_this the current instance of #CRTknzr.
|
|
*@param a_offset the offset of the peeked byte starting from the current
|
|
*byte in the parser input stream.
|
|
*@param a_eof out parameter. If not NULL, is set to TRUE if we reached end of
|
|
*file, FALE otherwise. If the caller sets it to NULL, this parameter
|
|
*is just ignored.
|
|
*@return the peeked byte.
|
|
*/
|
|
guchar
|
|
cr_tknzr_peek_byte2 (CRTknzr * a_this, gulong a_offset, gboolean * a_eof)
|
|
{
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input, 0);
|
|
|
|
return cr_input_peek_byte2 (PRIVATE (a_this)->input, a_offset, a_eof);
|
|
}
|
|
|
|
/**
|
|
*Gets the number of bytes left in the topmost input stream
|
|
*associated to this parser.
|
|
*@param a_this the current instance of #CRTknzr
|
|
*@return the number of bytes left or -1 in case of error.
|
|
*/
|
|
glong
|
|
cr_tknzr_get_nb_bytes_left (CRTknzr * a_this)
|
|
{
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input, CR_BAD_PARAM_ERROR);
|
|
|
|
if (PRIVATE (a_this)->token_cache) {
|
|
cr_input_set_cur_pos (PRIVATE (a_this)->input,
|
|
&PRIVATE (a_this)->prev_pos);
|
|
cr_token_destroy (PRIVATE (a_this)->token_cache);
|
|
PRIVATE (a_this)->token_cache = NULL;
|
|
}
|
|
|
|
return cr_input_get_nb_bytes_left (PRIVATE (a_this)->input);
|
|
}
|
|
|
|
enum CRStatus
|
|
cr_tknzr_get_cur_pos (CRTknzr * a_this, CRInputPos * a_pos)
|
|
{
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input
|
|
&& a_pos, CR_BAD_PARAM_ERROR);
|
|
|
|
if (PRIVATE (a_this)->token_cache) {
|
|
cr_input_set_cur_pos (PRIVATE (a_this)->input,
|
|
&PRIVATE (a_this)->prev_pos);
|
|
cr_token_destroy (PRIVATE (a_this)->token_cache);
|
|
PRIVATE (a_this)->token_cache = NULL;
|
|
}
|
|
|
|
return cr_input_get_cur_pos (PRIVATE (a_this)->input, a_pos);
|
|
}
|
|
|
|
enum CRStatus
|
|
cr_tknzr_get_parsing_location (CRTknzr *a_this,
|
|
CRParsingLocation *a_loc)
|
|
{
|
|
g_return_val_if_fail (a_this
|
|
&& PRIVATE (a_this)
|
|
&& a_loc,
|
|
CR_BAD_PARAM_ERROR) ;
|
|
|
|
return cr_input_get_parsing_location
|
|
(PRIVATE (a_this)->input, a_loc) ;
|
|
}
|
|
|
|
enum CRStatus
|
|
cr_tknzr_get_cur_byte_addr (CRTknzr * a_this, guchar ** a_addr)
|
|
{
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input, CR_BAD_PARAM_ERROR);
|
|
if (PRIVATE (a_this)->token_cache) {
|
|
cr_input_set_cur_pos (PRIVATE (a_this)->input,
|
|
&PRIVATE (a_this)->prev_pos);
|
|
cr_token_destroy (PRIVATE (a_this)->token_cache);
|
|
PRIVATE (a_this)->token_cache = NULL;
|
|
}
|
|
|
|
return cr_input_get_cur_byte_addr (PRIVATE (a_this)->input, a_addr);
|
|
}
|
|
|
|
enum CRStatus
|
|
cr_tknzr_seek_index (CRTknzr * a_this, enum CRSeekPos a_origin, gint a_pos)
|
|
{
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input, CR_BAD_PARAM_ERROR);
|
|
|
|
if (PRIVATE (a_this)->token_cache) {
|
|
cr_input_set_cur_pos (PRIVATE (a_this)->input,
|
|
&PRIVATE (a_this)->prev_pos);
|
|
cr_token_destroy (PRIVATE (a_this)->token_cache);
|
|
PRIVATE (a_this)->token_cache = NULL;
|
|
}
|
|
|
|
return cr_input_seek_index (PRIVATE (a_this)->input, a_origin, a_pos);
|
|
}
|
|
|
|
enum CRStatus
|
|
cr_tknzr_consume_chars (CRTknzr * a_this, guint32 a_char, glong * a_nb_char)
|
|
{
|
|
gulong consumed = *(gulong *) a_nb_char;
|
|
enum CRStatus status;
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input, CR_BAD_PARAM_ERROR);
|
|
|
|
if (PRIVATE (a_this)->token_cache) {
|
|
cr_input_set_cur_pos (PRIVATE (a_this)->input,
|
|
&PRIVATE (a_this)->prev_pos);
|
|
cr_token_destroy (PRIVATE (a_this)->token_cache);
|
|
PRIVATE (a_this)->token_cache = NULL;
|
|
}
|
|
|
|
status = cr_input_consume_chars (PRIVATE (a_this)->input,
|
|
a_char, &consumed);
|
|
*a_nb_char = (glong) consumed;
|
|
return status;
|
|
}
|
|
|
|
enum CRStatus
|
|
cr_tknzr_set_cur_pos (CRTknzr * a_this, CRInputPos * a_pos)
|
|
{
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input, CR_BAD_PARAM_ERROR);
|
|
|
|
if (PRIVATE (a_this)->token_cache) {
|
|
cr_token_destroy (PRIVATE (a_this)->token_cache);
|
|
PRIVATE (a_this)->token_cache = NULL;
|
|
}
|
|
|
|
return cr_input_set_cur_pos (PRIVATE (a_this)->input, a_pos);
|
|
}
|
|
|
|
enum CRStatus
|
|
cr_tknzr_unget_token (CRTknzr * a_this, CRToken * a_token)
|
|
{
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->token_cache == NULL,
|
|
CR_BAD_PARAM_ERROR);
|
|
|
|
PRIVATE (a_this)->token_cache = a_token;
|
|
|
|
return CR_OK;
|
|
}
|
|
|
|
/**
|
|
*Returns the next token of the input stream.
|
|
*This method is really central. Each parsing
|
|
*method calls it.
|
|
*@param a_this the current tokenizer.
|
|
*@param a_tk out parameter. The returned token.
|
|
*for the sake of mem leak avoidance, *a_tk must
|
|
*be NULL.
|
|
*@param CR_OK upon successful completion, an error code
|
|
*otherwise.
|
|
*/
|
|
enum CRStatus
|
|
cr_tknzr_get_next_token (CRTknzr * a_this, CRToken ** a_tk)
|
|
{
|
|
enum CRStatus status = CR_OK;
|
|
CRToken *token = NULL;
|
|
CRInputPos init_pos;
|
|
guint32 next_char = 0;
|
|
guchar next_bytes[4] = { 0 };
|
|
gboolean reached_eof = FALSE;
|
|
CRInput *input = NULL;
|
|
CRString *str = NULL;
|
|
CRRgb *rgb = NULL;
|
|
CRParsingLocation location = {0} ;
|
|
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& a_tk && *a_tk == NULL
|
|
&& PRIVATE (a_this)->input,
|
|
CR_BAD_PARAM_ERROR);
|
|
|
|
if (PRIVATE (a_this)->token_cache) {
|
|
*a_tk = PRIVATE (a_this)->token_cache;
|
|
PRIVATE (a_this)->token_cache = NULL;
|
|
return CR_OK;
|
|
}
|
|
|
|
RECORD_INITIAL_POS (a_this, &init_pos);
|
|
|
|
status = cr_input_get_end_of_file
|
|
(PRIVATE (a_this)->input, &reached_eof);
|
|
ENSURE_PARSING_COND (status == CR_OK);
|
|
|
|
if (reached_eof == TRUE) {
|
|
status = CR_END_OF_INPUT_ERROR;
|
|
goto error;
|
|
}
|
|
|
|
input = PRIVATE (a_this)->input;
|
|
|
|
PEEK_NEXT_CHAR (a_this, &next_char);
|
|
token = cr_token_new ();
|
|
ENSURE_PARSING_COND (token);
|
|
|
|
switch (next_char) {
|
|
case '@':
|
|
{
|
|
if (BYTE (input, 2, NULL) == 'f'
|
|
&& BYTE (input, 3, NULL) == 'o'
|
|
&& BYTE (input, 4, NULL) == 'n'
|
|
&& BYTE (input, 5, NULL) == 't'
|
|
&& BYTE (input, 6, NULL) == '-'
|
|
&& BYTE (input, 7, NULL) == 'f'
|
|
&& BYTE (input, 8, NULL) == 'a'
|
|
&& BYTE (input, 9, NULL) == 'c'
|
|
&& BYTE (input, 10, NULL) == 'e') {
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location
|
|
(a_this, &location) ;
|
|
SKIP_CHARS (a_this, 9);
|
|
status = cr_token_set_font_face_sym (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
}
|
|
|
|
if (BYTE (input, 2, NULL) == 'c'
|
|
&& BYTE (input, 3, NULL) == 'h'
|
|
&& BYTE (input, 4, NULL) == 'a'
|
|
&& BYTE (input, 5, NULL) == 'r'
|
|
&& BYTE (input, 6, NULL) == 's'
|
|
&& BYTE (input, 7, NULL) == 'e'
|
|
&& BYTE (input, 8, NULL) == 't') {
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location
|
|
(a_this, &location) ;
|
|
SKIP_CHARS (a_this, 7);
|
|
status = cr_token_set_charset_sym (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
}
|
|
|
|
if (BYTE (input, 2, NULL) == 'i'
|
|
&& BYTE (input, 3, NULL) == 'm'
|
|
&& BYTE (input, 4, NULL) == 'p'
|
|
&& BYTE (input, 5, NULL) == 'o'
|
|
&& BYTE (input, 6, NULL) == 'r'
|
|
&& BYTE (input, 7, NULL) == 't') {
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location
|
|
(a_this, &location) ;
|
|
SKIP_CHARS (a_this, 6);
|
|
status = cr_token_set_import_sym (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
}
|
|
|
|
if (BYTE (input, 2, NULL) == 'm'
|
|
&& BYTE (input, 3, NULL) == 'e'
|
|
&& BYTE (input, 4, NULL) == 'd'
|
|
&& BYTE (input, 5, NULL) == 'i'
|
|
&& BYTE (input, 6, NULL) == 'a') {
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
SKIP_CHARS (a_this, 5);
|
|
status = cr_token_set_media_sym (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
}
|
|
|
|
if (BYTE (input, 2, NULL) == 'p'
|
|
&& BYTE (input, 3, NULL) == 'a'
|
|
&& BYTE (input, 4, NULL) == 'g'
|
|
&& BYTE (input, 5, NULL) == 'e') {
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
SKIP_CHARS (a_this, 4);
|
|
status = cr_token_set_page_sym (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
}
|
|
status = cr_tknzr_parse_atkeyword (a_this, &str);
|
|
if (status == CR_OK) {
|
|
status = cr_token_set_atkeyword (token, str);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
if (str) {
|
|
cr_parsing_location_copy (&token->location,
|
|
&str->location) ;
|
|
}
|
|
goto done;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case 'u':
|
|
|
|
if (BYTE (input, 2, NULL) == 'r'
|
|
&& BYTE (input, 3, NULL) == 'l'
|
|
&& BYTE (input, 4, NULL) == '(') {
|
|
CRString *str2 = NULL;
|
|
|
|
status = cr_tknzr_parse_uri (a_this, &str2);
|
|
if (status == CR_OK) {
|
|
status = cr_token_set_uri (token, str2);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
if (str2) {
|
|
cr_parsing_location_copy (&token->location,
|
|
&str2->location) ;
|
|
}
|
|
goto done;
|
|
}
|
|
}
|
|
goto fallback;
|
|
break;
|
|
|
|
case 'r':
|
|
if (BYTE (input, 2, NULL) == 'g'
|
|
&& BYTE (input, 3, NULL) == 'b'
|
|
&& BYTE (input, 4, NULL) == '(') {
|
|
status = cr_tknzr_parse_rgb (a_this, &rgb);
|
|
if (status == CR_OK && rgb) {
|
|
status = cr_token_set_rgb (token, rgb);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
if (rgb) {
|
|
cr_parsing_location_copy (&token->location,
|
|
&rgb->location) ;
|
|
}
|
|
rgb = NULL;
|
|
goto done;
|
|
}
|
|
|
|
}
|
|
goto fallback;
|
|
break;
|
|
|
|
case '<':
|
|
if (BYTE (input, 2, NULL) == '!'
|
|
&& BYTE (input, 3, NULL) == '-'
|
|
&& BYTE (input, 4, NULL) == '-') {
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
SKIP_CHARS (a_this, 3);
|
|
status = cr_token_set_cdo (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
}
|
|
break;
|
|
|
|
case '-':
|
|
if (BYTE (input, 2, NULL) == '-'
|
|
&& BYTE (input, 3, NULL) == '>') {
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
SKIP_CHARS (a_this, 2);
|
|
status = cr_token_set_cdc (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
} else {
|
|
status = cr_tknzr_parse_ident
|
|
(a_this, &str);
|
|
if (status == CR_OK) {
|
|
cr_token_set_ident
|
|
(token, str);
|
|
if (str) {
|
|
cr_parsing_location_copy (&token->location,
|
|
&str->location) ;
|
|
}
|
|
goto done;
|
|
} else {
|
|
goto parse_number;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case '~':
|
|
if (BYTE (input, 2, NULL) == '=') {
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
SKIP_CHARS (a_this, 1);
|
|
status = cr_token_set_includes (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
}
|
|
break;
|
|
|
|
case '|':
|
|
if (BYTE (input, 2, NULL) == '=') {
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
SKIP_CHARS (a_this, 1);
|
|
status = cr_token_set_dashmatch (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
}
|
|
break;
|
|
|
|
case '/':
|
|
if (BYTE (input, 2, NULL) == '*') {
|
|
status = cr_tknzr_parse_comment (a_this, &str);
|
|
|
|
if (status == CR_OK) {
|
|
status = cr_token_set_comment (token, str);
|
|
str = NULL;
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
if (str) {
|
|
cr_parsing_location_copy (&token->location,
|
|
&str->location) ;
|
|
}
|
|
goto done;
|
|
}
|
|
}
|
|
break ;
|
|
|
|
case ';':
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
status = cr_token_set_semicolon (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
|
|
case '{':
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
status = cr_token_set_cbo (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
goto done;
|
|
|
|
case '}':
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
status = cr_token_set_cbc (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
|
|
case '(':
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
status = cr_token_set_po (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
|
|
case ')':
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
status = cr_token_set_pc (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
|
|
case '[':
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
status = cr_token_set_bo (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
|
|
case ']':
|
|
SKIP_CHARS (a_this, 1);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
status = cr_token_set_bc (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
|
|
case ' ':
|
|
case '\t':
|
|
case '\n':
|
|
case '\f':
|
|
case '\r':
|
|
{
|
|
guchar *start = NULL,
|
|
*end = NULL;
|
|
|
|
status = cr_tknzr_parse_w (a_this, &start,
|
|
&end, &location);
|
|
if (status == CR_OK) {
|
|
status = cr_token_set_s (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
goto done;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case '#':
|
|
{
|
|
status = cr_tknzr_parse_hash (a_this, &str);
|
|
if (status == CR_OK && str) {
|
|
status = cr_token_set_hash (token, str);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
if (str) {
|
|
cr_parsing_location_copy (&token->location,
|
|
&str->location) ;
|
|
}
|
|
str = NULL;
|
|
goto done;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case '\'':
|
|
case '"':
|
|
status = cr_tknzr_parse_string (a_this, &str);
|
|
if (status == CR_OK && str) {
|
|
status = cr_token_set_string (token, str);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
if (str) {
|
|
cr_parsing_location_copy (&token->location,
|
|
&str->location) ;
|
|
}
|
|
str = NULL;
|
|
goto done;
|
|
}
|
|
break;
|
|
|
|
case '!':
|
|
status = cr_tknzr_parse_important (a_this, &location);
|
|
if (status == CR_OK) {
|
|
status = cr_token_set_important_sym (token);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
goto done;
|
|
}
|
|
break;
|
|
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
case '.':
|
|
case '+':
|
|
/* '-' case is handled separately above for --> comments */
|
|
parse_number:
|
|
{
|
|
CRNum *num = NULL;
|
|
|
|
status = cr_tknzr_parse_num (a_this, &num);
|
|
if (status == CR_OK && num) {
|
|
next_bytes[0] = BYTE (input, 1, NULL);
|
|
next_bytes[1] = BYTE (input, 2, NULL);
|
|
next_bytes[2] = BYTE (input, 3, NULL);
|
|
next_bytes[3] = BYTE (input, 4, NULL);
|
|
|
|
if (next_bytes[0] == 'e'
|
|
&& next_bytes[1] == 'm') {
|
|
num->type = NUM_LENGTH_EM;
|
|
status = cr_token_set_ems (token,
|
|
num);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 2);
|
|
} else if (next_bytes[0] == 'e'
|
|
&& next_bytes[1] == 'x') {
|
|
num->type = NUM_LENGTH_EX;
|
|
status = cr_token_set_exs (token,
|
|
num);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 2);
|
|
} else if (next_bytes[0] == 'p'
|
|
&& next_bytes[1] == 'x') {
|
|
num->type = NUM_LENGTH_PX;
|
|
status = cr_token_set_length
|
|
(token, num, LENGTH_PX_ET);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 2);
|
|
} else if (next_bytes[0] == 'c'
|
|
&& next_bytes[1] == 'm') {
|
|
num->type = NUM_LENGTH_CM;
|
|
status = cr_token_set_length
|
|
(token, num, LENGTH_CM_ET);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 2);
|
|
} else if (next_bytes[0] == 'm'
|
|
&& next_bytes[1] == 'm') {
|
|
num->type = NUM_LENGTH_MM;
|
|
status = cr_token_set_length
|
|
(token, num, LENGTH_MM_ET);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 2);
|
|
} else if (next_bytes[0] == 'i'
|
|
&& next_bytes[1] == 'n') {
|
|
num->type = NUM_LENGTH_IN;
|
|
status = cr_token_set_length
|
|
(token, num, LENGTH_IN_ET);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 2);
|
|
} else if (next_bytes[0] == 'p'
|
|
&& next_bytes[1] == 't') {
|
|
num->type = NUM_LENGTH_PT;
|
|
status = cr_token_set_length
|
|
(token, num, LENGTH_PT_ET);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 2);
|
|
} else if (next_bytes[0] == 'p'
|
|
&& next_bytes[1] == 'c') {
|
|
num->type = NUM_LENGTH_PC;
|
|
status = cr_token_set_length
|
|
(token, num, LENGTH_PC_ET);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 2);
|
|
} else if (next_bytes[0] == 'd'
|
|
&& next_bytes[1] == 'e'
|
|
&& next_bytes[2] == 'g') {
|
|
num->type = NUM_ANGLE_DEG;
|
|
status = cr_token_set_angle
|
|
(token, num, ANGLE_DEG_ET);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 3);
|
|
} else if (next_bytes[0] == 'r'
|
|
&& next_bytes[1] == 'a'
|
|
&& next_bytes[2] == 'd') {
|
|
num->type = NUM_ANGLE_RAD;
|
|
status = cr_token_set_angle
|
|
(token, num, ANGLE_RAD_ET);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 3);
|
|
} else if (next_bytes[0] == 'g'
|
|
&& next_bytes[1] == 'r'
|
|
&& next_bytes[2] == 'a'
|
|
&& next_bytes[3] == 'd') {
|
|
num->type = NUM_ANGLE_GRAD;
|
|
status = cr_token_set_angle
|
|
(token, num, ANGLE_GRAD_ET);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 4);
|
|
} else if (next_bytes[0] == 'm'
|
|
&& next_bytes[1] == 's') {
|
|
num->type = NUM_TIME_MS;
|
|
status = cr_token_set_time
|
|
(token, num, TIME_MS_ET);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 2);
|
|
} else if (next_bytes[0] == 's') {
|
|
num->type = NUM_TIME_S;
|
|
status = cr_token_set_time
|
|
(token, num, TIME_S_ET);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 1);
|
|
} else if (next_bytes[0] == 'H'
|
|
&& next_bytes[1] == 'z') {
|
|
num->type = NUM_FREQ_HZ;
|
|
status = cr_token_set_freq
|
|
(token, num, FREQ_HZ_ET);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 2);
|
|
} else if (next_bytes[0] == 'k'
|
|
&& next_bytes[1] == 'H'
|
|
&& next_bytes[2] == 'z') {
|
|
num->type = NUM_FREQ_KHZ;
|
|
status = cr_token_set_freq
|
|
(token, num, FREQ_KHZ_ET);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 3);
|
|
} else if (next_bytes[0] == '%') {
|
|
num->type = NUM_PERCENTAGE;
|
|
status = cr_token_set_percentage
|
|
(token, num);
|
|
num = NULL;
|
|
SKIP_CHARS (a_this, 1);
|
|
} else {
|
|
status = cr_tknzr_parse_ident (a_this,
|
|
&str);
|
|
if (status == CR_OK && str) {
|
|
num->type = NUM_UNKNOWN_TYPE;
|
|
status = cr_token_set_dimen
|
|
(token, num, str);
|
|
num = NULL;
|
|
CHECK_PARSING_STATUS (status,
|
|
TRUE);
|
|
str = NULL;
|
|
} else {
|
|
status = cr_token_set_number
|
|
(token, num);
|
|
num = NULL;
|
|
CHECK_PARSING_STATUS (status, CR_OK);
|
|
str = NULL;
|
|
}
|
|
}
|
|
if (token && token->u.num) {
|
|
cr_parsing_location_copy (&token->location,
|
|
&token->u.num->location) ;
|
|
} else {
|
|
status = CR_ERROR ;
|
|
}
|
|
goto done ;
|
|
}
|
|
}
|
|
break;
|
|
|
|
default:
|
|
fallback:
|
|
/*process the fallback cases here */
|
|
|
|
if (next_char == '\\'
|
|
|| (cr_utils_is_nonascii (next_bytes[0]) == TRUE)
|
|
|| ((next_char >= 'a') && (next_char <= 'z'))
|
|
|| ((next_char >= 'A') && (next_char <= 'Z'))) {
|
|
status = cr_tknzr_parse_ident (a_this, &str);
|
|
if (status == CR_OK && str) {
|
|
guint32 next_c = 0;
|
|
|
|
status = cr_input_peek_char
|
|
(PRIVATE (a_this)->input, &next_c);
|
|
|
|
if (status == CR_OK && next_c == '(') {
|
|
|
|
SKIP_CHARS (a_this, 1);
|
|
status = cr_token_set_function
|
|
(token, str);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
/*ownership is transferred
|
|
*to token by cr_token_set_function.
|
|
*/
|
|
if (str) {
|
|
cr_parsing_location_copy (&token->location,
|
|
&str->location) ;
|
|
}
|
|
str = NULL;
|
|
} else {
|
|
status = cr_token_set_ident (token,
|
|
str);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
if (str) {
|
|
cr_parsing_location_copy (&token->location,
|
|
&str->location) ;
|
|
}
|
|
str = NULL;
|
|
}
|
|
goto done;
|
|
} else {
|
|
if (str) {
|
|
cr_string_destroy (str);
|
|
str = NULL;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
|
|
READ_NEXT_CHAR (a_this, &next_char);
|
|
cr_tknzr_get_parsing_location (a_this,
|
|
&location) ;
|
|
status = cr_token_set_delim (token, next_char);
|
|
CHECK_PARSING_STATUS (status, TRUE);
|
|
cr_parsing_location_copy (&token->location,
|
|
&location) ;
|
|
done:
|
|
|
|
if (status == CR_OK && token) {
|
|
*a_tk = token;
|
|
/*
|
|
*store the previous position input stream pos.
|
|
*/
|
|
memmove (&PRIVATE (a_this)->prev_pos,
|
|
&init_pos, sizeof (CRInputPos));
|
|
return CR_OK;
|
|
}
|
|
|
|
error:
|
|
if (token) {
|
|
cr_token_destroy (token);
|
|
token = NULL;
|
|
}
|
|
|
|
if (str) {
|
|
cr_string_destroy (str);
|
|
str = NULL;
|
|
}
|
|
cr_tknzr_set_cur_pos (a_this, &init_pos);
|
|
return status;
|
|
|
|
}
|
|
|
|
enum CRStatus
|
|
cr_tknzr_parse_token (CRTknzr * a_this, enum CRTokenType a_type,
|
|
enum CRTokenExtraType a_et, gpointer a_res,
|
|
gpointer a_extra_res)
|
|
{
|
|
enum CRStatus status = CR_OK;
|
|
CRToken *token = NULL;
|
|
|
|
g_return_val_if_fail (a_this && PRIVATE (a_this)
|
|
&& PRIVATE (a_this)->input
|
|
&& a_res, CR_BAD_PARAM_ERROR);
|
|
|
|
status = cr_tknzr_get_next_token (a_this, &token);
|
|
if (status != CR_OK)
|
|
return status;
|
|
if (token == NULL)
|
|
return CR_PARSING_ERROR;
|
|
|
|
if (token->type == a_type) {
|
|
switch (a_type) {
|
|
case NO_TK:
|
|
case S_TK:
|
|
case CDO_TK:
|
|
case CDC_TK:
|
|
case INCLUDES_TK:
|
|
case DASHMATCH_TK:
|
|
case IMPORT_SYM_TK:
|
|
case PAGE_SYM_TK:
|
|
case MEDIA_SYM_TK:
|
|
case FONT_FACE_SYM_TK:
|
|
case CHARSET_SYM_TK:
|
|
case IMPORTANT_SYM_TK:
|
|
status = CR_OK;
|
|
break;
|
|
|
|
case STRING_TK:
|
|
case IDENT_TK:
|
|
case HASH_TK:
|
|
case ATKEYWORD_TK:
|
|
case FUNCTION_TK:
|
|
case COMMENT_TK:
|
|
case URI_TK:
|
|
*((CRString **) a_res) = token->u.str;
|
|
token->u.str = NULL;
|
|
status = CR_OK;
|
|
break;
|
|
|
|
case EMS_TK:
|
|
case EXS_TK:
|
|
case PERCENTAGE_TK:
|
|
case NUMBER_TK:
|
|
*((CRNum **) a_res) = token->u.num;
|
|
token->u.num = NULL;
|
|
status = CR_OK;
|
|
break;
|
|
|
|
case LENGTH_TK:
|
|
case ANGLE_TK:
|
|
case TIME_TK:
|
|
case FREQ_TK:
|
|
if (token->extra_type == a_et) {
|
|
*((CRNum **) a_res) = token->u.num;
|
|
token->u.num = NULL;
|
|
status = CR_OK;
|
|
}
|
|
break;
|
|
|
|
case DIMEN_TK:
|
|
*((CRNum **) a_res) = token->u.num;
|
|
if (a_extra_res == NULL) {
|
|
status = CR_BAD_PARAM_ERROR;
|
|
goto error;
|
|
}
|
|
|
|
*((CRString **) a_extra_res) = token->dimen;
|
|
token->u.num = NULL;
|
|
token->dimen = NULL;
|
|
status = CR_OK;
|
|
break;
|
|
|
|
case DELIM_TK:
|
|
*((guint32 *) a_res) = token->u.unichar;
|
|
status = CR_OK;
|
|
break;
|
|
|
|
case UNICODERANGE_TK:
|
|
default:
|
|
status = CR_PARSING_ERROR;
|
|
break;
|
|
}
|
|
|
|
cr_token_destroy (token);
|
|
token = NULL;
|
|
} else {
|
|
cr_tknzr_unget_token (a_this, token);
|
|
token = NULL;
|
|
status = CR_PARSING_ERROR;
|
|
}
|
|
|
|
return status;
|
|
|
|
error:
|
|
|
|
if (token) {
|
|
cr_tknzr_unget_token (a_this, token);
|
|
token = NULL;
|
|
}
|
|
|
|
return status;
|
|
}
|
|
|
|
void
|
|
cr_tknzr_destroy (CRTknzr * a_this)
|
|
{
|
|
g_return_if_fail (a_this);
|
|
|
|
if (PRIVATE (a_this) && PRIVATE (a_this)->input) {
|
|
if (cr_input_unref (PRIVATE (a_this)->input)
|
|
== TRUE) {
|
|
PRIVATE (a_this)->input = NULL;
|
|
}
|
|
}
|
|
|
|
if (PRIVATE (a_this)->token_cache) {
|
|
cr_token_destroy (PRIVATE (a_this)->token_cache);
|
|
PRIVATE (a_this)->token_cache = NULL;
|
|
}
|
|
|
|
if (PRIVATE (a_this)) {
|
|
g_free (PRIVATE (a_this));
|
|
PRIVATE (a_this) = NULL;
|
|
}
|
|
|
|
g_free (a_this);
|
|
}
|