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Specialize binary encoding on little endian arches

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Kovid Goyal 2023-07-15 13:49:03 +05:30
parent c84874ca8d
commit 98294b8cab
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GPG key ID: 06BC317B515ACE7C
1 changed files with 20 additions and 6 deletions
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26
kitty/binary.h
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@ -8,24 +8,38 @@
#include <stdint.h>
inline static uint16_t le16(const uint8_t b[const static 2]) {
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
inline static uint16_t le16(const uint8_t b[sizeof(uint16_t)]) { return *((uint16_t*)b); }
inline static uint16_t le32(const uint8_t b[sizeof(uint32_t)]) { return *((uint32_t*)b); }
inline static uint16_t le64(const uint8_t b[sizeof(uint64_t)]) { return *((uint64_t*)b); }
inline static void le16b(uint8_t b[sizeof(uint16_t)], const uint16_t n) { *((uint16_t*)b) = n; }
inline static void le32b(uint8_t b[sizeof(uint32_t)], const uint32_t n) { *((uint32_t*)b) = n; }
inline static void le64b(uint8_t b[sizeof(uint64_t)], const uint64_t n) { *((uint64_t*)b) = n; }
#else
inline static uint16_t le16(const uint8_t b[sizeof(uint16_t)]) {
return b[0]|(uint16_t)b[1]<<8;
}
inline static uint32_t le32(const uint8_t b[const static 4]) {
inline static uint32_t le32(const uint8_t b[sizeof(uint32_t)]) {
return le16(b)|(uint32_t)le16(b+2)<<16;
}
inline static uint64_t le64(const uint8_t b[const static 8]) {
inline static uint64_t le64(const uint8_t b[sizeof(uint64_t)]) {
return le32(b)|(uint64_t)le32(b+4)<<32;
}
inline static void le16b(uint8_t b[const static 2], const uint16_t n) {
inline static void le16b(uint8_t b[sizeof(uint16_t)], const uint16_t n) {
b[0] = n;
b[1] = n>>8;
}
inline static void le32b(uint8_t b[const static 4], const uint32_t n) {
inline static void le32b(uint8_t b[sizeof(uint32_t)], const uint32_t n) {
le16b(b, n);
le16b(b+2, n>>16);
}
inline static void le64b(uint8_t b[const static 8], const uint64_t n) {
inline static void le64b(uint8_t b[sizeof(uint64_t)], const uint64_t n) {
le32b(b, n);
le32b(b+4, n>>32);
}
#endif