summaryrefslogtreecommitdiff
path: root/thirdparty/assimp/code/FBXBinaryTokenizer.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'thirdparty/assimp/code/FBXBinaryTokenizer.cpp')
-rw-r--r--thirdparty/assimp/code/FBXBinaryTokenizer.cpp466
1 files changed, 466 insertions, 0 deletions
diff --git a/thirdparty/assimp/code/FBXBinaryTokenizer.cpp b/thirdparty/assimp/code/FBXBinaryTokenizer.cpp
new file mode 100644
index 0000000000..7138df4315
--- /dev/null
+++ b/thirdparty/assimp/code/FBXBinaryTokenizer.cpp
@@ -0,0 +1,466 @@
+/*
+Open Asset Import Library (assimp)
+----------------------------------------------------------------------
+
+Copyright (c) 2006-2019, assimp team
+
+
+All rights reserved.
+
+Redistribution and use of this software in source and binary forms,
+with or without modification, are permitted provided that the
+following conditions are met:
+
+* Redistributions of source code must retain the above
+ copyright notice, this list of conditions and the
+ following disclaimer.
+
+* Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the
+ following disclaimer in the documentation and/or other
+ materials provided with the distribution.
+
+* Neither the name of the assimp team, nor the names of its
+ contributors may be used to endorse or promote products
+ derived from this software without specific prior
+ written permission of the assimp team.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+----------------------------------------------------------------------
+*/
+/** @file FBXBinaryTokenizer.cpp
+ * @brief Implementation of a fake lexer for binary fbx files -
+ * we emit tokens so the parser needs almost no special handling
+ * for binary files.
+ */
+
+#ifndef ASSIMP_BUILD_NO_FBX_IMPORTER
+
+#include "FBXTokenizer.h"
+#include "FBXUtil.h"
+#include <assimp/defs.h>
+#include <stdint.h>
+#include <assimp/Exceptional.h>
+#include <assimp/ByteSwapper.h>
+
+namespace Assimp {
+namespace FBX {
+
+//enum Flag
+//{
+// e_unknown_0 = 1 << 0,
+// e_unknown_1 = 1 << 1,
+// e_unknown_2 = 1 << 2,
+// e_unknown_3 = 1 << 3,
+// e_unknown_4 = 1 << 4,
+// e_unknown_5 = 1 << 5,
+// e_unknown_6 = 1 << 6,
+// e_unknown_7 = 1 << 7,
+// e_unknown_8 = 1 << 8,
+// e_unknown_9 = 1 << 9,
+// e_unknown_10 = 1 << 10,
+// e_unknown_11 = 1 << 11,
+// e_unknown_12 = 1 << 12,
+// e_unknown_13 = 1 << 13,
+// e_unknown_14 = 1 << 14,
+// e_unknown_15 = 1 << 15,
+// e_unknown_16 = 1 << 16,
+// e_unknown_17 = 1 << 17,
+// e_unknown_18 = 1 << 18,
+// e_unknown_19 = 1 << 19,
+// e_unknown_20 = 1 << 20,
+// e_unknown_21 = 1 << 21,
+// e_unknown_22 = 1 << 22,
+// e_unknown_23 = 1 << 23,
+// e_flag_field_size_64_bit = 1 << 24, // Not sure what is
+// e_unknown_25 = 1 << 25,
+// e_unknown_26 = 1 << 26,
+// e_unknown_27 = 1 << 27,
+// e_unknown_28 = 1 << 28,
+// e_unknown_29 = 1 << 29,
+// e_unknown_30 = 1 << 30,
+// e_unknown_31 = 1 << 31
+//};
+//
+//bool check_flag(uint32_t flags, Flag to_check)
+//{
+// return (flags & to_check) != 0;
+//}
+// ------------------------------------------------------------------------------------------------
+Token::Token(const char* sbegin, const char* send, TokenType type, unsigned int offset)
+ :
+ #ifdef DEBUG
+ contents(sbegin, static_cast<size_t>(send-sbegin)),
+ #endif
+ sbegin(sbegin)
+ , send(send)
+ , type(type)
+ , line(offset)
+ , column(BINARY_MARKER)
+{
+ ai_assert(sbegin);
+ ai_assert(send);
+
+ // binary tokens may have zero length because they are sometimes dummies
+ // inserted by TokenizeBinary()
+ ai_assert(send >= sbegin);
+}
+
+
+namespace {
+
+// ------------------------------------------------------------------------------------------------
+// signal tokenization error, this is always unrecoverable. Throws DeadlyImportError.
+AI_WONT_RETURN void TokenizeError(const std::string& message, unsigned int offset) AI_WONT_RETURN_SUFFIX;
+AI_WONT_RETURN void TokenizeError(const std::string& message, unsigned int offset)
+{
+ throw DeadlyImportError(Util::AddOffset("FBX-Tokenize",message,offset));
+}
+
+
+// ------------------------------------------------------------------------------------------------
+uint32_t Offset(const char* begin, const char* cursor) {
+ ai_assert(begin <= cursor);
+
+ return static_cast<unsigned int>(cursor - begin);
+}
+
+// ------------------------------------------------------------------------------------------------
+void TokenizeError(const std::string& message, const char* begin, const char* cursor) {
+ TokenizeError(message, Offset(begin, cursor));
+}
+
+// ------------------------------------------------------------------------------------------------
+uint32_t ReadWord(const char* input, const char*& cursor, const char* end) {
+ const size_t k_to_read = sizeof( uint32_t );
+ if(Offset(cursor, end) < k_to_read ) {
+ TokenizeError("cannot ReadWord, out of bounds",input, cursor);
+ }
+
+ uint32_t word;
+ ::memcpy(&word, cursor, 4);
+ AI_SWAP4(word);
+
+ cursor += k_to_read;
+
+ return word;
+}
+
+// ------------------------------------------------------------------------------------------------
+uint64_t ReadDoubleWord(const char* input, const char*& cursor, const char* end) {
+ const size_t k_to_read = sizeof(uint64_t);
+ if(Offset(cursor, end) < k_to_read) {
+ TokenizeError("cannot ReadDoubleWord, out of bounds",input, cursor);
+ }
+
+ uint64_t dword /*= *reinterpret_cast<const uint64_t*>(cursor)*/;
+ ::memcpy( &dword, cursor, sizeof( uint64_t ) );
+ AI_SWAP8(dword);
+
+ cursor += k_to_read;
+
+ return dword;
+}
+
+// ------------------------------------------------------------------------------------------------
+uint8_t ReadByte(const char* input, const char*& cursor, const char* end) {
+ if(Offset(cursor, end) < sizeof( uint8_t ) ) {
+ TokenizeError("cannot ReadByte, out of bounds",input, cursor);
+ }
+
+ uint8_t word;/* = *reinterpret_cast< const uint8_t* >( cursor )*/
+ ::memcpy( &word, cursor, sizeof( uint8_t ) );
+ ++cursor;
+
+ return word;
+}
+
+// ------------------------------------------------------------------------------------------------
+unsigned int ReadString(const char*& sbegin_out, const char*& send_out, const char* input,
+ const char*& cursor, const char* end, bool long_length = false, bool allow_null = false) {
+ const uint32_t len_len = long_length ? 4 : 1;
+ if(Offset(cursor, end) < len_len) {
+ TokenizeError("cannot ReadString, out of bounds reading length",input, cursor);
+ }
+
+ const uint32_t length = long_length ? ReadWord(input, cursor, end) : ReadByte(input, cursor, end);
+
+ if (Offset(cursor, end) < length) {
+ TokenizeError("cannot ReadString, length is out of bounds",input, cursor);
+ }
+
+ sbegin_out = cursor;
+ cursor += length;
+
+ send_out = cursor;
+
+ if(!allow_null) {
+ for (unsigned int i = 0; i < length; ++i) {
+ if(sbegin_out[i] == '\0') {
+ TokenizeError("failed ReadString, unexpected NUL character in string",input, cursor);
+ }
+ }
+ }
+
+ return length;
+}
+
+// ------------------------------------------------------------------------------------------------
+void ReadData(const char*& sbegin_out, const char*& send_out, const char* input, const char*& cursor, const char* end) {
+ if(Offset(cursor, end) < 1) {
+ TokenizeError("cannot ReadData, out of bounds reading length",input, cursor);
+ }
+
+ const char type = *cursor;
+ sbegin_out = cursor++;
+
+ switch(type)
+ {
+ // 16 bit int
+ case 'Y':
+ cursor += 2;
+ break;
+
+ // 1 bit bool flag (yes/no)
+ case 'C':
+ cursor += 1;
+ break;
+
+ // 32 bit int
+ case 'I':
+ // <- fall through
+
+ // float
+ case 'F':
+ cursor += 4;
+ break;
+
+ // double
+ case 'D':
+ cursor += 8;
+ break;
+
+ // 64 bit int
+ case 'L':
+ cursor += 8;
+ break;
+
+ // note: do not write cursor += ReadWord(...cursor) as this would be UB
+
+ // raw binary data
+ case 'R':
+ {
+ const uint32_t length = ReadWord(input, cursor, end);
+ cursor += length;
+ break;
+ }
+
+ case 'b':
+ // TODO: what is the 'b' type code? Right now we just skip over it /
+ // take the full range we could get
+ cursor = end;
+ break;
+
+ // array of *
+ case 'f':
+ case 'd':
+ case 'l':
+ case 'i':
+ case 'c': {
+ const uint32_t length = ReadWord(input, cursor, end);
+ const uint32_t encoding = ReadWord(input, cursor, end);
+
+ const uint32_t comp_len = ReadWord(input, cursor, end);
+
+ // compute length based on type and check against the stored value
+ if(encoding == 0) {
+ uint32_t stride = 0;
+ switch(type)
+ {
+ case 'f':
+ case 'i':
+ stride = 4;
+ break;
+
+ case 'd':
+ case 'l':
+ stride = 8;
+ break;
+
+ case 'c':
+ stride = 1;
+ break;
+
+ default:
+ ai_assert(false);
+ };
+ ai_assert(stride > 0);
+ if(length * stride != comp_len) {
+ TokenizeError("cannot ReadData, calculated data stride differs from what the file claims",input, cursor);
+ }
+ }
+ // zip/deflate algorithm (encoding==1)? take given length. anything else? die
+ else if (encoding != 1) {
+ TokenizeError("cannot ReadData, unknown encoding",input, cursor);
+ }
+ cursor += comp_len;
+ break;
+ }
+
+ // string
+ case 'S': {
+ const char* sb, *se;
+ // 0 characters can legally happen in such strings
+ ReadString(sb, se, input, cursor, end, true, true);
+ break;
+ }
+ default:
+ TokenizeError("cannot ReadData, unexpected type code: " + std::string(&type, 1),input, cursor);
+ }
+
+ if(cursor > end) {
+ TokenizeError("cannot ReadData, the remaining size is too small for the data type: " + std::string(&type, 1),input, cursor);
+ }
+
+ // the type code is contained in the returned range
+ send_out = cursor;
+}
+
+
+// ------------------------------------------------------------------------------------------------
+bool ReadScope(TokenList& output_tokens, const char* input, const char*& cursor, const char* end, bool const is64bits)
+{
+ // the first word contains the offset at which this block ends
+ const uint64_t end_offset = is64bits ? ReadDoubleWord(input, cursor, end) : ReadWord(input, cursor, end);
+
+ // we may get 0 if reading reached the end of the file -
+ // fbx files have a mysterious extra footer which I don't know
+ // how to extract any information from, but at least it always
+ // starts with a 0.
+ if(!end_offset) {
+ return false;
+ }
+
+ if(end_offset > Offset(input, end)) {
+ TokenizeError("block offset is out of range",input, cursor);
+ }
+ else if(end_offset < Offset(input, cursor)) {
+ TokenizeError("block offset is negative out of range",input, cursor);
+ }
+
+ // the second data word contains the number of properties in the scope
+ const uint64_t prop_count = is64bits ? ReadDoubleWord(input, cursor, end) : ReadWord(input, cursor, end);
+
+ // the third data word contains the length of the property list
+ const uint64_t prop_length = is64bits ? ReadDoubleWord(input, cursor, end) : ReadWord(input, cursor, end);
+
+ // now comes the name of the scope/key
+ const char* sbeg, *send;
+ ReadString(sbeg, send, input, cursor, end);
+
+ output_tokens.push_back(new_Token(sbeg, send, TokenType_KEY, Offset(input, cursor) ));
+
+ // now come the individual properties
+ const char* begin_cursor = cursor;
+ for (unsigned int i = 0; i < prop_count; ++i) {
+ ReadData(sbeg, send, input, cursor, begin_cursor + prop_length);
+
+ output_tokens.push_back(new_Token(sbeg, send, TokenType_DATA, Offset(input, cursor) ));
+
+ if(i != prop_count-1) {
+ output_tokens.push_back(new_Token(cursor, cursor + 1, TokenType_COMMA, Offset(input, cursor) ));
+ }
+ }
+
+ if (Offset(begin_cursor, cursor) != prop_length) {
+ TokenizeError("property length not reached, something is wrong",input, cursor);
+ }
+
+ // at the end of each nested block, there is a NUL record to indicate
+ // that the sub-scope exists (i.e. to distinguish between P: and P : {})
+ // this NUL record is 13 bytes long on 32 bit version and 25 bytes long on 64 bit.
+ const size_t sentinel_block_length = is64bits ? (sizeof(uint64_t)* 3 + 1) : (sizeof(uint32_t)* 3 + 1);
+
+ if (Offset(input, cursor) < end_offset) {
+ if (end_offset - Offset(input, cursor) < sentinel_block_length) {
+ TokenizeError("insufficient padding bytes at block end",input, cursor);
+ }
+
+ output_tokens.push_back(new_Token(cursor, cursor + 1, TokenType_OPEN_BRACKET, Offset(input, cursor) ));
+
+ // XXX this is vulnerable to stack overflowing ..
+ while(Offset(input, cursor) < end_offset - sentinel_block_length) {
+ ReadScope(output_tokens, input, cursor, input + end_offset - sentinel_block_length, is64bits);
+ }
+ output_tokens.push_back(new_Token(cursor, cursor + 1, TokenType_CLOSE_BRACKET, Offset(input, cursor) ));
+
+ for (unsigned int i = 0; i < sentinel_block_length; ++i) {
+ if(cursor[i] != '\0') {
+ TokenizeError("failed to read nested block sentinel, expected all bytes to be 0",input, cursor);
+ }
+ }
+ cursor += sentinel_block_length;
+ }
+
+ if (Offset(input, cursor) != end_offset) {
+ TokenizeError("scope length not reached, something is wrong",input, cursor);
+ }
+
+ return true;
+}
+
+} // anonymous namespace
+
+// ------------------------------------------------------------------------------------------------
+// TODO: Test FBX Binary files newer than the 7500 version to check if the 64 bits address behaviour is consistent
+void TokenizeBinary(TokenList& output_tokens, const char* input, unsigned int length)
+{
+ ai_assert(input);
+
+ if(length < 0x1b) {
+ TokenizeError("file is too short",0);
+ }
+
+ //uint32_t offset = 0x15;
+/* const char* cursor = input + 0x15;
+
+ const uint32_t flags = ReadWord(input, cursor, input + length);
+
+ const uint8_t padding_0 = ReadByte(input, cursor, input + length); // unused
+ const uint8_t padding_1 = ReadByte(input, cursor, input + length); // unused*/
+
+ if (strncmp(input,"Kaydara FBX Binary",18)) {
+ TokenizeError("magic bytes not found",0);
+ }
+
+ const char* cursor = input + 18;
+ /*Result ignored*/ ReadByte(input, cursor, input + length);
+ /*Result ignored*/ ReadByte(input, cursor, input + length);
+ /*Result ignored*/ ReadByte(input, cursor, input + length);
+ /*Result ignored*/ ReadByte(input, cursor, input + length);
+ /*Result ignored*/ ReadByte(input, cursor, input + length);
+ const uint32_t version = ReadWord(input, cursor, input + length);
+ const bool is64bits = version >= 7500;
+ const char *end = input + length;
+ while (cursor < end ) {
+ if (!ReadScope(output_tokens, input, cursor, input + length, is64bits)) {
+ break;
+ }
+ }
+}
+
+} // !FBX
+} // !Assimp
+
+#endif
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-20 17:27:22 +0000