Package: sparse
Version: 0.4-2
Severity: normal
On amd64, both "unsigned long" and "unsigned long long" are 64 bits. On this
architecture, I would therefore expect sparse to generate the same warnings
relating to both types. This is not the case however, as illustrated by the
test code below. Is this a bug in sparse, or am I misunderstanding sparse's
behaviour in this case?
/* Build with `cgcc -Wall test.c' */
#include <stdio.h>
int main(int argc, char **argv) {
long int li;
long long int lli;
printf("sizeof(unsigned long): %li\n", sizeof(unsigned long));
/* Outputs `sizeof(unsigned long): 8' */
printf("sizeof(unsigned long long): %li\n", sizeof(unsigned long
long)); /* Outputs `sizeof(unsigned long long): 8' */
printf("sizeof(unsigned long) == sizeof(unsigned long long): %i\n",
sizeof(unsigned long) == sizeof(unsigned long long));
/* Outputs `sizeof(unsigned long) == sizeof(unsigned long long): 1' */
li = (11644473600UL);
/* sparse outputs
warning: constant 11644473600UL is so big it is unsigned long
long
warning: cast truncates bits from constant value (2b6109100
becomes b6109100)
*/
printf("%li\n", li); /* Outputs `11644473600', so nothing was truncated
*/
li = (11644473600ULL);
/* sparse results:
warning: cast truncates bits from constant value (2b6109100
becomes b6109100)
*/
printf("%li\n", li); /* Outputs `11644473600', so nothing was truncated
*/
lli = (11644473600ULL);
printf("%lli\n", lli); /* Outputs `11644473600' */
return 0;
}
-- System Information:
Debian Release: lenny/sid
APT prefers unstable
APT policy: (990, 'unstable'), (500, 'testing-proposed-updates'), (500,
'stable'), (400, 'testing')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.23.1 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages sparse depends on:
ii libc6 2.6.1-6 GNU C Library: Shared libraries
sparse recommends no packages.
-- no debconf information
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