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Add comments for new macros.

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This commit is contained in:
Jim Meyering
2005-03-18 09:37:54 +00:00
parent aa450da526
commit 500175daed
1 changed files with 5 additions and 3 deletions
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8
src/system.h
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@@ -818,6 +818,8 @@ ptr_align (void *ptr, size_t alignment)
#define VERIFY_EXPR(assertion) \
(void)((struct {char a[(assertion) ? 1 : -1]; } *) 0)
/* Use the compile-time type-max. assertion only if the compiler provides
the __typeof__ operator. */
#if HAVE_TYPEOF
# define VERIFY_W_TYPEOF(assertion) VERIFY_EXPR (assertion)
#else
@@ -826,9 +828,9 @@ ptr_align (void *ptr, size_t alignment)
/* If 10*Accum+Digit_val is larger than Type_max, then don't update Accum
and return nonzero. Otherwise, set Accum to that new value and
return zero. When compiling with gcc, perform a compile-time check
to verify that the specified Type_max constant is the same as the
constant derived from the type of Accum. */
return zero. With a compiler that provides the __typeof__ operator,
perform a compile-time check to verify that the specified Type_max
constant is the same as the constant derived from the type of Accum. */
#define DECIMAL_DIGIT_ACCUMULATE(Accum, Digit_val, Type_max) \
( \
/* Ensure that Type_max is the maximum value of Accum. */ \