author | rubidium |
Thu, 01 Feb 2007 15:49:12 +0000 | |
changeset 5893 | 7e431a4abebb |
parent 5587 | 167d9a91ef02 |
child 6125 | a6fff965707c |
permissions | -rw-r--r-- |
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/* $Id$ */ |
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#include <stdio.h> |
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#include <string.h> |
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// This pretty simple file checks if the system is LITTLE_ENDIAN or BIG_ENDIAN |
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// it does that by putting a 1 and a 0 in an array, and read it out as one |
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// number. If it is 1, it is LITTLE_ENDIAN, if it is 256, it is BIG_ENDIAN |
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// |
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// After that it outputs the contents of an include files (endian.h) |
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// that says or TTD_LITTLE_ENDIAN, or TTD_BIG_ENDIAN. Makefile takes |
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// care of the real writing to the file. |
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int main (int argc, char *argv[]) { |
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unsigned char EndianTest[2] = { 1, 0 }; |
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int force_BE = 0, force_LE = 0, force_PREPROCESSOR = 0; |
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if (argc > 1 && strcmp(argv[1], "BE") == 0) |
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force_BE = 1; |
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if (argc > 1 && strcmp(argv[1], "LE") == 0) |
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force_LE = 1; |
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if (argc > 1 && strcmp(argv[1], "PREPROCESSOR") == 0) |
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force_PREPROCESSOR = 1; |
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printf("#ifndef ENDIAN_H\n#define ENDIAN_H\n"); |
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if (force_LE == 1) { |
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printf("#define TTD_LITTLE_ENDIAN\n"); |
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} else { |
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if (force_BE == 1) { |
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printf("#define TTD_BIG_ENDIAN\n"); |
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} else { |
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if (force_PREPROCESSOR == 1) { |
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// adding support for universal binaries on OSX |
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// Universal binaries supports both PPC and x86 |
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// If a compiler for OSX gets this setting, it will always pick the correct endian and no test is needed |
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printf("#ifdef __BIG_ENDIAN__\n"); |
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printf("#define TTD_BIG_ENDIAN\n"); |
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printf("#else\n"); |
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printf("#define TTD_LITTLE_ENDIAN\n"); |
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printf("#endif\n"); |
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} else { |
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if ( *(short *) EndianTest == 1 ) |
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printf("#define TTD_LITTLE_ENDIAN\n"); |
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else |
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printf("#define TTD_BIG_ENDIAN\n"); |
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} |
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} |
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} |
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printf("#endif\n"); |
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return 0; |
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} |