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70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
#ifndef __FAT_TYPES_H__
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#define __FAT_TYPES_H__
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// Detect 64-bit compilation on GCC
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#if defined(__GNUC__) && defined(__SIZEOF_LONG__)
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#if __SIZEOF_LONG__ == 8
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#define FATFS_DEF_UINT32_AS_INT
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#endif
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#endif
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//-------------------------------------------------------------
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// System specific types
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//-------------------------------------------------------------
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#ifndef FATFS_NO_DEF_TYPES
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typedef unsigned char uint8;
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typedef unsigned short uint16;
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// If compiling on a 64-bit machine, use int as 32-bits
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#ifdef FATFS_DEF_UINT32_AS_INT
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typedef unsigned int uint32;
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// Else for 32-bit machines & embedded systems, use long...
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#else
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typedef unsigned long uint32;
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#endif
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#endif
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#ifndef NULL
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#define NULL 0
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#endif
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//-------------------------------------------------------------
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// Endian Macros
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//-------------------------------------------------------------
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// FAT is little endian so big endian systems need to swap words
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// Little Endian - No swap required
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#if FATFS_IS_LITTLE_ENDIAN == 1
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#define FAT_HTONS(n) (n)
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#define FAT_HTONL(n) (n)
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// Big Endian - Swap required
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#else
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#define FAT_HTONS(n) ((((uint16)((n) & 0xff)) << 8) | (((n) & 0xff00) >> 8))
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#define FAT_HTONL(n) (((((uint32)(n) & 0xFF)) << 24) | \
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((((uint32)(n) & 0xFF00)) << 8) | \
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((((uint32)(n) & 0xFF0000)) >> 8) | \
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((((uint32)(n) & 0xFF000000)) >> 24))
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#endif
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//-------------------------------------------------------------
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// Structure Packing Compile Options
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//-------------------------------------------------------------
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#ifdef __GNUC__
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#define STRUCT_PACK
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#define STRUCT_PACK_BEGIN
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#define STRUCT_PACK_END
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#define STRUCT_PACKED __attribute__ ((packed))
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#else
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// Other compilers may require other methods of packing structures
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#define STRUCT_PACK
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#define STRUCT_PACK_BEGIN
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#define STRUCT_PACK_END
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#define STRUCT_PACKED
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#endif
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#endif
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