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more nhmd4.c formatting

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Insert a space between cast operator and target.

For 'x | y' expression spanning multiple lines, split with bitwise OR
operator at the beginning of second line instead at the end of first.

I changed a macro that was expanding to 'expr_1; expr_2' into
'(expr_1, expr_2)'.  Both expressions modify arg 'a' which would be
a no-no within a single expression, but the comma operator provides a
sequence point that guarantees that the first expression will be fully
evaluated with side-effects--assignment to 'a'--completed before the
second one starts, making both assignments be well defined.
This commit is contained in:
PatR
2024-02-26 11:46:03 -08:00
parent 5acb82640d
commit 1d26f80ccf
1 changed files with 12 additions and 10 deletions
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22
src/nhmd4.c
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@@ -40,11 +40,14 @@ static const unsigned char *body(struct nhmd4_context *,
#define H(x, y, z) ((x) ^ (y) ^ (z))
/*
* The MD4 transformation for all four rounds.
* STEP: the MD4 transformation used for all four rounds.
* (Joining two expressions with the comma operator provides a sequence
* point. C89/C90 and later guarantee that the first will be fully complete
* before the second starts, making both assignments to 'a' be well defined.)
*/
#define STEP(f, a, b, c, d, x, s) \
(a) += f((b), (c), (d)) + (x); \
(a) = ((a) << (s)) | ((a) >> (32 - (s)))
(((a) += f((b), (c), (d)) + (x)), \
((a) = ((a) << (s)) | ((a) >> (32 - (s)))))
/*
* SET reads 4 input bytes in little-endian byte order and stores them
@@ -55,17 +58,16 @@ static const unsigned char *body(struct nhmd4_context *,
* doesn't work.
*/
#if defined(__i386__) || defined(__x86_64__)
#define SET(n) (*(const quint32 *)&ptr[(n) * 4])
#define SET(n) (*(const quint32 *) &ptr[(n) * 4])
#define GET(n) SET(n)
#else
#define SET(n) \
(ctx->block[(n)] = \
(quint32)ptr[(n) * 4] | \
((quint32)ptr[(n) * 4 + 1] << 8) | \
((quint32)ptr[(n) * 4 + 2] << 16) | \
((quint32)ptr[(n) * 4 + 3] << 24))
#define GET(n) \
(ctx->block[(n)])
((quint32) ptr[(n) * 4] \
| ((quint32) ptr[(n) * 4 + 1] << 8) \
| ((quint32) ptr[(n) * 4 + 2] << 16) \
| ((quint32) ptr[(n) * 4 + 3] << 24)))
#define GET(n) (ctx->block[(n)])
#endif
/*