diff options
Diffstat (limited to 'src/generate-macros.c')
| -rw-r--r-- | src/generate-macros.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/src/generate-macros.c b/src/generate-macros.c index ef87ad5..165c168 100644 --- a/src/generate-macros.c +++ b/src/generate-macros.c @@ -1,9 +1,40 @@ +/* See LICENSE file for copyright and license details. */ #include <stdint.h> #include <stdio.h> int main(void) { + char *u16 = (char *)&(uint16_t){0x0001}; + char *u32 = (char *)&(uint32_t){0x00010203}; + char *u64 = (char *)&(uint64_t){0x0001020304050607}; + int le16 = (u16[1] == 0 && u16[0] == 1); + int le32 = (u32[3] == 0 && u32[2] == 1 && u32[1] == 2 && u32[0] == 3); + int le64 = (u64[7] == 0 && u64[6] == 1 && u64[5] == 2 && u64[4] == 3 && + u64[3] == 4 && u64[2] == 5 && u64[1] == 6 && u64[0] == 7); + int be16 = (u16[0] == 0 && u16[1] == 1); + int be32 = (u32[0] == 0 && u32[1] == 1 && u32[2] == 2 && u32[3] == 3); + int be64 = (u64[0] == 0 && u64[1] == 1 && u64[2] == 2 && u64[3] == 3 && + u64[4] == 4 && u64[5] == 5 && u64[6] == 6 && u64[7] == 7); + + if (le16) + printf("#define HOST_ENDIAN_IS_LITTLE_ENDIAN_16\n"); + if (le32) + printf("#define HOST_ENDIAN_IS_LITTLE_ENDIAN_32\n"); + if (le64) + printf("#define HOST_ENDIAN_IS_LITTLE_ENDIAN_64\n"); + if (le16 && le32 && le64) + printf("#define HOST_ENDIAN_IS_LITTLE_ENDIAN\n"); + + if (be16) + printf("#define HOST_ENDIAN_IS_BIG_ENDIAN_16\n"); + if (be32) + printf("#define HOST_ENDIAN_IS_BIG_ENDIAN_32\n"); + if (be64) + printf("#define HOST_ENDIAN_IS_BIG_ENDIAN_64\n"); + if (be16 && be32 && be64) + printf("#define HOST_ENDIAN_IS_BIG_ENDIAN\n"); + if (sizeof(float) == 4) { unsigned long int a, b; a = (unsigned long int)*(uint32_t *)&(float){ (float)(1. / 12.) }; @@ -18,5 +49,6 @@ main(void) printf("#define USING_BINARY64 %i\n", a == 0x3fb5555555555555ULL && b == 0xbfb5555555555555ULL); } + return 0; } |