diff options
author | sanine <sanine.not@pm.me> | 2022-04-16 11:55:09 -0500 |
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committer | sanine <sanine.not@pm.me> | 2022-04-16 11:55:09 -0500 |
commit | db81b925d776103326128bf629cbdda576a223e7 (patch) | |
tree | 58bea8155c686733310009f6bed7363f91fbeb9d /libs/assimp/code/Common/IFF.h | |
parent | 55860037b14fb3893ba21cf2654c83d349cc1082 (diff) |
move 3rd-party librarys into libs/ and add built-in honeysuckle
Diffstat (limited to 'libs/assimp/code/Common/IFF.h')
-rw-r--r-- | libs/assimp/code/Common/IFF.h | 102 |
1 files changed, 102 insertions, 0 deletions
diff --git a/libs/assimp/code/Common/IFF.h b/libs/assimp/code/Common/IFF.h new file mode 100644 index 0000000..91d7d48 --- /dev/null +++ b/libs/assimp/code/Common/IFF.h @@ -0,0 +1,102 @@ +// Definitions for the Interchange File Format (IFF) +// Alexander Gessler, 2006 +// Adapted to Assimp August 2008 + +#ifndef AI_IFF_H_INCLUDED +#define AI_IFF_H_INCLUDED + +#include <assimp/ByteSwapper.h> + +namespace Assimp { +namespace IFF { + +///////////////////////////////////////////////////////////////////////////////// +//! Describes an IFF chunk header +///////////////////////////////////////////////////////////////////////////////// +struct ChunkHeader +{ + //! Type of the chunk header - FourCC + uint32_t type; + + //! Length of the chunk data, in bytes + uint32_t length; +}; + + +///////////////////////////////////////////////////////////////////////////////// +//! Describes an IFF sub chunk header +///////////////////////////////////////////////////////////////////////////////// +struct SubChunkHeader +{ + //! Type of the chunk header - FourCC + uint32_t type; + + //! Length of the chunk data, in bytes + uint16_t length; +}; + + +#define AI_IFF_FOURCC(a,b,c,d) ((uint32_t) (((uint8_t)a << 24u) | \ + ((uint8_t)b << 16u) | ((uint8_t)c << 8u) | ((uint8_t)d))) + + +#define AI_IFF_FOURCC_FORM AI_IFF_FOURCC('F','O','R','M') + + +///////////////////////////////////////////////////////////////////////////////// +//! Load a chunk header +//! @param outFile Pointer to the file data - points to the chunk data afterwards +//! @return Copy of the chunk header +///////////////////////////////////////////////////////////////////////////////// +inline ChunkHeader LoadChunk(uint8_t*& outFile) +{ + ChunkHeader head; + ::memcpy(&head.type, outFile, 4); + outFile += 4; + ::memcpy(&head.length, outFile, 4); + outFile += 4; + AI_LSWAP4(head.length); + AI_LSWAP4(head.type); + return head; +} + +///////////////////////////////////////////////////////////////////////////////// +//! Load a sub chunk header +//! @param outFile Pointer to the file data - points to the chunk data afterwards +//! @return Copy of the sub chunk header +///////////////////////////////////////////////////////////////////////////////// +inline SubChunkHeader LoadSubChunk(uint8_t*& outFile) +{ + SubChunkHeader head; + ::memcpy(&head.type, outFile, 4); + outFile += 4; + ::memcpy(&head.length, outFile, 2); + outFile += 2; + AI_LSWAP2(head.length); + AI_LSWAP4(head.type); + return head; +} + +///////////////////////////////////////////////////////////////////////////////// +//! Read the file header and return the type of the file and its size +//! @param outFile Pointer to the file data. The buffer must at +//! least be 12 bytes large. +//! @param fileType Receives the type of the file +//! @return 0 if everything was OK, otherwise an error message +///////////////////////////////////////////////////////////////////////////////// +inline const char* ReadHeader(uint8_t* outFile, uint32_t& fileType) +{ + ChunkHeader head = LoadChunk(outFile); + if(AI_IFF_FOURCC_FORM != head.type) + { + return "The file is not an IFF file: FORM chunk is missing"; + } + ::memcpy(&fileType, outFile, 4); + AI_LSWAP4(fileType); + return 0; +} + + +}} + +#endif // !! AI_IFF_H_INCLUDED |