Mercurial > gnulib
changeset 29113:c6e4859ca538
Fix "integer overflow" warnings with OSF/1 5.1 cc.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Mon, 29 Oct 2007 03:59:04 +0100 |
| parents | 326902134568 |
| children | d57f7b5c5048 |
| files | ChangeLog lib/stdint.in.h |
| diffstat | 2 files changed, 9 insertions(+), 1 deletions(-) [+] |
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--- a/ChangeLog Mon Oct 29 03:56:55 2007 +0100 +++ b/ChangeLog Mon Oct 29 03:59:04 2007 +0100 @@ -1,3 +1,8 @@ +2007-10-28 Bruno Haible <bruno@clisp.org> + + * lib/stdint.in.h (_STDINT_MAX): Subtract 1 from an unused signed + integer shift in the signed case. Fixes warnings with OSF/1 5.1 cc. + 2007-10-28 Bruno Haible <bruno@clisp.org> Fix link errors with Sun C 5.0 on Solaris 10.
--- a/lib/stdint.in.h Mon Oct 29 03:56:55 2007 +0100 +++ b/lib/stdint.in.h Mon Oct 29 03:59:04 2007 +0100 @@ -101,7 +101,10 @@ #define _STDINT_MAX(signed, bits, zero) \ ((signed) \ ? ~ _STDINT_MIN (signed, bits, zero) \ - : ((((zero) + 1) << ((bits) ? (bits) - 1 : 0)) - 1) * 2 + 1) + : /* The expression for the unsigned case. The subtraction of (signed) \ + is a nop in the unsigned case and avoids "signed integer overflow" \ + warnings in the signed case. */ \ + ((((zero) + 1) << ((bits) ? (bits) - 1 - (signed) : 0)) - 1) * 2 + 1) /* 7.18.1.1. Exact-width integer types */