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signed type work

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SCCS-file: private.h
SCCS-SID: 7.36
This commit is contained in:
Arthur David Olson
1996-01-06 13:28:07 -05:00
committed by Paul Eggert
parent 1fec11d88b
commit 4c40fb7c3e
1 changed files with 6 additions and 11 deletions
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17
private.h
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@ -157,19 +157,14 @@ extern int unlink P((const char * filename));
#ifndef INT_STRLEN_MAXIMUM
/*
** 302 / 1000 is log10(2.0) rounded up.
** If type is signed:
** subtract one for the sign bit;
** add one for integer division truncation;
** add one more for a minus sign.
** If type is unsigned:
** do not subtract one since there is no sign bit;
** add one for integer division truncation;
** do not add one more for a minus sign.
** Subtract one for the sign bit if the type is signed;
** add one for integer division truncation;
** add one more for a minus sign if the type is signed.
*/
#define TYPE_BIT(type) (sizeof (type) * CHAR_BIT)
#define TYPE_SIGNED(type) (((type) -1) < 0)
#define INT_STRLEN_MAXIMUM(type) \
((((type) -1) < 0) ? \
((sizeof(type) * CHAR_BIT - 1) * 302 / 1000 + 2) : \
((sizeof(type) * CHAR_BIT) * 302 / 1000 + 1))
((TYPE_BIT(type) - TYPE_SIGNED(type)) * 302 / 100 + 1 + TYPE_SIGNED(type))
#endif /* !defined INT_STRLEN_MAXIMUM */
/*