endian_check.cpp
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00002
00012 #include <stdio.h>
00013 #include <string.h>
00014
00016 enum Endian {
00017 ENDIAN_LITTLE,
00018 ENDIAN_BIG
00019 };
00020
00025 static inline void printf_endian(Endian endian)
00026 {
00027 printf("#define TTD_ENDIAN %s\n", endian == ENDIAN_LITTLE ? "TTD_LITTLE_ENDIAN" : "TTD_BIG_ENDIAN");
00028 }
00029
00036 int main (int argc, char *argv[])
00037 {
00038 unsigned char endian_test[2] = { 1, 0 };
00039 int force_BE = 0, force_LE = 0, force_PREPROCESSOR = 0;
00040
00041 if (argc > 1 && strcmp(argv[1], "BE") == 0) force_BE = 1;
00042 if (argc > 1 && strcmp(argv[1], "LE") == 0) force_LE = 1;
00043 if (argc > 1 && strcmp(argv[1], "PREPROCESSOR") == 0) force_PREPROCESSOR = 1;
00044
00045 printf("#ifndef ENDIAN_H\n#define ENDIAN_H\n");
00046
00047 if (force_LE == 1) {
00048 printf_endian(ENDIAN_LITTLE);
00049 } else if (force_BE == 1) {
00050 printf_endian(ENDIAN_BIG);
00051 } else if (force_PREPROCESSOR == 1) {
00052
00053
00054
00055
00056 printf("#ifdef __BIG_ENDIAN__\n");
00057 printf_endian(ENDIAN_BIG);
00058 printf("#else\n");
00059 printf_endian(ENDIAN_LITTLE);
00060 printf("#endif\n");
00061 } else if (*(short*)endian_test == 1 ) {
00062 printf_endian(ENDIAN_LITTLE);
00063 } else {
00064 printf_endian(ENDIAN_BIG);
00065 }
00066 printf("#endif\n");
00067
00068 return 0;
00069 }