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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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30
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 h = 0;
if (LITTLE_ENDIAN)
memcpy(&h, bytes, HWORD_SIZE);
else
for (size_t i = 0; i < HWORD_SIZE; ++i)
h |= ((hword_t)(bytes[i]) << (8 * i));
memcpy(&h, bytes, HWORD_SIZE);
if (!LITTLE_ENDIAN)
h = hword_byteswap(h);
return h;
}
word_t convert_bytes_to_word(const byte_t *bytes)
{
word_t h = 0;
if (LITTLE_ENDIAN)
memcpy(&h, bytes, WORD_SIZE);
else
for (size_t i = 0; i < WORD_SIZE; ++i)
h |= ((word_t)(bytes[i]) << (8 * i));
memcpy(&h, bytes, WORD_SIZE);
if (!LITTLE_ENDIAN)
h = word_byteswap(h);
return h;
}
void convert_hword_to_bytes(hword_t w, byte_t *bytes)
{
if (LITTLE_ENDIAN)
memcpy(bytes, &w, HWORD_SIZE);
else
for (size_t i = 0; i < HWORD_SIZE; ++i)
bytes[i] = WORD_NTH_BYTE(w, i);
hword_t h = LITTLE_ENDIAN ? w : hword_byteswap(w);
memcpy(bytes, &h, HWORD_SIZE);
}
void convert_word_to_bytes(word_t w, byte_t *bytes)
{
if (LITTLE_ENDIAN)
memcpy(bytes, &w, WORD_SIZE);
else
for (size_t i = 0; i < WORD_SIZE; ++i)
bytes[i] = WORD_NTH_BYTE(w, i);
word_t h = LITTLE_ENDIAN ? w : word_byteswap(w);
memcpy(bytes, &h, WORD_SIZE);
}