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btrfs-progs: add helpers for parsing 32bit ranges 

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2015-10-13 16:34:33 +02:00
parent be85a75fec
commit d0d2b43e71
1 changed files with 32 additions and 0 deletions
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32
cmds-balance.c
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@ -161,6 +161,38 @@ static int parse_range_strict(const char *range, u64 *start, u64 *end)
return 1;
}
/*
* Convert 64bit range to 32bit with boundary checkso
*/
static int range_to_u32(u64 start, u64 end, u32 *start32, u32 *end32)
{
if (start > (u32)-1)
return 1;
if (end != (u64)-1 && end > (u32)-1)
return 1;
*start32 = (u32)start;
*end32 = (u32)end;
return 0;
}
__attribute__ ((unused))
static int parse_range_u32(const char *range, u32 *start, u32 *end)
{
u64 tmp_start;
u64 tmp_end;
if (parse_range(range, &tmp_start, &tmp_end))
return 1;
if (range_to_u32(tmp_start, tmp_end, start, end))
return 1;
return 0;
}
static int parse_filters(char *filters, struct btrfs_balance_args *args)
{
char *this_char;