Parse > 2GiB file sizes correctly

We were using atol(), which on 32 bit, cannot handle values greater than
2GiB, which is fail.

Switch to a strtoull() wrapper function tailored toward parsing off_t
values. This allows parsing of very large positive integer values. off_t
is a signed type, but in our usages, we never parse or have a need for
negative values, so the function will return -1 on error.

Before:
    $ pacman -Si flightgear-data | grep Size
    Download Size  : 2097152.00 K
    Installed Size : 2097152.00 K

After:
    $ ./src/pacman/pacman -Si flightgear-data | grep Size
    Download Size  : 2312592.52 KiB
    Installed Size : 5402896.00 KiB

Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/libalpm/util.h b/lib/libalpm/util.h
index 921ed459..c5544a04 100644
--- a/lib/libalpm/util.h
+++ b/lib/libalpm/util.h
@@ -119,6 +119,7 @@ int _alpm_archive_fgets(struct archive *a, struct archive_read_buffer *b);
 int _alpm_splitname(const char *target, char **name, char **version,
 		unsigned long *name_hash);
 unsigned long _alpm_hash_sdbm(const char *str);
+off_t _alpm_strtoofft(const char *line);
 long _alpm_parsedate(const char *line);
 int _alpm_raw_cmp(const char *first, const char *second);
 int _alpm_raw_ncmp(const char *first, const char *second, size_t max);