255 lines
8.8 KiB
C++
255 lines
8.8 KiB
C++
/*************************************************************************/
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/* FBXTokenizer.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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/*
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Open Asset Import Library (assimp)
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----------------------------------------------------------------------
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Copyright (c) 2006-2019, assimp team
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All rights reserved.
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Redistribution and use of this software in source and binary forms,
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with or without modification, are permitted provided that the
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following conditions are met:
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* Redistributions of source code must retain the above
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copyright notice, this list of conditions and the
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following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other
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materials provided with the distribution.
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* Neither the name of the assimp team, nor the names of its
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contributors may be used to endorse or promote products
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derived from this software without specific prior
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written permission of the assimp team.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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----------------------------------------------------------------------
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*/
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/** @file FBXTokenizer.cpp
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* @brief Implementation of the FBX broadphase lexer
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*/
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// tab width for logging columns
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#define ASSIMP_FBX_TAB_WIDTH 4
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#include "FBXTokenizer.h"
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#include "core/print_string.h"
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namespace FBXDocParser {
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// ------------------------------------------------------------------------------------------------
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Token::Token(const char *p_sbegin, const char *p_send, TokenType p_type, unsigned int p_line, unsigned int p_column) :
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sbegin(p_sbegin),
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send(p_send),
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type(p_type),
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line(p_line),
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column(p_column) {
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#ifdef DEBUG_ENABLED
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contents = std::string(sbegin, static_cast<size_t>(send - sbegin));
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#endif
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}
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// ------------------------------------------------------------------------------------------------
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Token::~Token() {
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}
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namespace {
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// ------------------------------------------------------------------------------------------------
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void TokenizeError(const std::string &message, unsigned int line, unsigned int column) {
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print_error("[FBX-Tokenize]" + String(message.c_str()) + " " + itos(line) + ":" + itos(column));
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}
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// process a potential data token up to 'cur', adding it to 'output_tokens'.
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// ------------------------------------------------------------------------------------------------
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void ProcessDataToken(TokenList &output_tokens, const char *&start, const char *&end,
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unsigned int line,
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unsigned int column,
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TokenType type = TokenType_DATA,
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bool must_have_token = false) {
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if (start && end) {
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// sanity check:
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// tokens should have no whitespace outside quoted text and [start,end] should
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// properly delimit the valid range.
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bool in_double_quotes = false;
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for (const char *c = start; c != end + 1; ++c) {
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if (*c == '\"') {
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in_double_quotes = !in_double_quotes;
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}
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if (!in_double_quotes && IsSpaceOrNewLine(*c)) {
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TokenizeError("unexpected whitespace in token", line, column);
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}
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}
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if (in_double_quotes) {
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TokenizeError("non-terminated double quotes", line, column);
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}
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output_tokens.push_back(new_Token(start, end + 1, type, line, column));
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} else if (must_have_token) {
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TokenizeError("unexpected character, expected data token", line, column);
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}
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start = end = nullptr;
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}
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} // namespace
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// ------------------------------------------------------------------------------------------------
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void Tokenize(TokenList &output_tokens, const char *input, size_t length) {
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// line and column numbers numbers are one-based
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unsigned int line = 1;
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unsigned int column = 1;
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bool comment = false;
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bool in_double_quotes = false;
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bool pending_data_token = false;
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const char *token_begin = nullptr, *token_end = nullptr;
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// input (starting string), *cur the current string, column +=
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// modified to fix strlen() and stop buffer overflow
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for (size_t x = 0; x < length; x++) {
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const char c = input[x];
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const char *cur = &input[x];
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column += (c == '\t' ? ASSIMP_FBX_TAB_WIDTH : 1);
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if (IsLineEnd(c)) {
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comment = false;
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column = 0;
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++line;
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}
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if (comment) {
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continue;
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}
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if (in_double_quotes) {
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if (c == '\"') {
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in_double_quotes = false;
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token_end = cur;
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ProcessDataToken(output_tokens, token_begin, token_end, line, column);
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pending_data_token = false;
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}
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continue;
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}
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switch (c) {
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case '\"':
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if (token_begin) {
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TokenizeError("unexpected double-quote", line, column);
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}
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token_begin = cur;
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in_double_quotes = true;
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continue;
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case ';':
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ProcessDataToken(output_tokens, token_begin, token_end, line, column);
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comment = true;
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continue;
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case '{':
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ProcessDataToken(output_tokens, token_begin, token_end, line, column);
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output_tokens.push_back(new_Token(cur, cur + 1, TokenType_OPEN_BRACKET, line, column));
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continue;
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case '}':
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ProcessDataToken(output_tokens, token_begin, token_end, line, column);
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output_tokens.push_back(new_Token(cur, cur + 1, TokenType_CLOSE_BRACKET, line, column));
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continue;
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case ',':
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if (pending_data_token) {
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ProcessDataToken(output_tokens, token_begin, token_end, line, column, TokenType_DATA, true);
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}
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output_tokens.push_back(new_Token(cur, cur + 1, TokenType_COMMA, line, column));
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continue;
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case ':':
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if (pending_data_token) {
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ProcessDataToken(output_tokens, token_begin, token_end, line, column, TokenType_KEY, true);
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} else {
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TokenizeError("unexpected colon", line, column);
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}
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continue;
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}
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if (IsSpaceOrNewLine(c)) {
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if (token_begin) {
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// peek ahead and check if the next token is a colon in which
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// case this counts as KEY token.
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TokenType type = TokenType_DATA;
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for (const char *peek = cur; *peek && IsSpaceOrNewLine(*peek); ++peek) {
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if (*peek == ':') {
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type = TokenType_KEY;
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cur = peek;
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break;
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}
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}
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ProcessDataToken(output_tokens, token_begin, token_end, line, column, type);
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}
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pending_data_token = false;
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} else {
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token_end = cur;
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if (!token_begin) {
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token_begin = cur;
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}
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pending_data_token = true;
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}
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}
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}
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} // namespace FBXDocParser
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