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Use byteswap to implement conversion to and from bytes

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Cleaner looking implementations
This commit is contained in:
Aryadev Chavali
2024-04-28 22:31:41 +05:30
parent 8aecb7b681
commit 2ab1ee34f9
1 changed files with 10 additions and 20 deletions
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26
lib/base.c
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@@ -29,39 +29,29 @@ word_t word_byteswap(const word_t w)
hword_t convert_bytes_to_hword(const byte_t *bytes) hword_t convert_bytes_to_hword(const byte_t *bytes)
{ {
hword_t h = 0; hword_t h = 0;
if (LITTLE_ENDIAN)
memcpy(&h, bytes, HWORD_SIZE); memcpy(&h, bytes, HWORD_SIZE);
else if (!LITTLE_ENDIAN)
for (size_t i = 0; i < HWORD_SIZE; ++i) h = hword_byteswap(h);
h |= ((hword_t)(bytes[i]) << (8 * i));
return h; return h;
} }
word_t convert_bytes_to_word(const byte_t *bytes) word_t convert_bytes_to_word(const byte_t *bytes)
{ {
word_t h = 0; word_t h = 0;
if (LITTLE_ENDIAN)
memcpy(&h, bytes, WORD_SIZE); memcpy(&h, bytes, WORD_SIZE);
else if (!LITTLE_ENDIAN)
for (size_t i = 0; i < WORD_SIZE; ++i) h = word_byteswap(h);
h |= ((word_t)(bytes[i]) << (8 * i));
return h; return h;
} }
void convert_hword_to_bytes(hword_t w, byte_t *bytes) void convert_hword_to_bytes(hword_t w, byte_t *bytes)
{ {
if (LITTLE_ENDIAN) hword_t h = LITTLE_ENDIAN ? w : hword_byteswap(w);
memcpy(bytes, &w, HWORD_SIZE); memcpy(bytes, &h, HWORD_SIZE);
else
for (size_t i = 0; i < HWORD_SIZE; ++i)
bytes[i] = WORD_NTH_BYTE(w, i);
} }
void convert_word_to_bytes(word_t w, byte_t *bytes) void convert_word_to_bytes(word_t w, byte_t *bytes)
{ {
if (LITTLE_ENDIAN) word_t h = LITTLE_ENDIAN ? w : word_byteswap(w);
memcpy(bytes, &w, WORD_SIZE); memcpy(bytes, &h, WORD_SIZE);
else
for (size_t i = 0; i < WORD_SIZE; ++i)
bytes[i] = WORD_NTH_BYTE(w, i);
} }