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| -rw-r--r-- | ChangeLog | 6 | ||||
| -rw-r--r-- | manual/lang.texi | 11 |
2 files changed, 11 insertions, 6 deletions
diff --git a/ChangeLog b/ChangeLog index 5ca4770e57..8850e53bc2 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,11 @@ 2017-07-27 Rical Jasan <ricaljasan@pacific.net> + * manual/lang.texi (CHAR_BIT): Convert from an @table to an + @deftypevr. Change standard from ISO to C90. Mention the + POSIX.1-2001 requirement of the value 8. + +2017-07-27 Rical Jasan <ricaljasan@pacific.net> + * manual/creature.texi (_REENTRANT): Annotate as obsolete. (_THREAD_SAFE): Likewise. diff --git a/manual/lang.texi b/manual/lang.texi index c4b641d4e1..75af677dc9 100644 --- a/manual/lang.texi +++ b/manual/lang.texi @@ -628,11 +628,10 @@ There is no operator in the C language that can give you the number of bits in an integer data type. But you can compute it from the macro @code{CHAR_BIT}, defined in the header file @file{limits.h}. -@table @code -@item CHAR_BIT -@standards{ISO, limits.h} -This is the number of bits in a @code{char}---eight, on most systems. -The value has type @code{int}. +@deftypevr Macro int CHAR_BIT +@standards{C90, limits.h} +This is the number of bits in a @code{char}. POSIX.1-2001 requires +this to be 8. You can compute the number of bits in any data type @var{type} like this: @@ -640,7 +639,7 @@ this: @smallexample sizeof (@var{type}) * CHAR_BIT @end smallexample -@end table +@end deftypevr That expression includes padding bits as well as value and sign bits. On all systems supported by @theglibc{}, standard integer types other |