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line-range: fix "blame -L X,-N" regression

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"blame -L X,-N" is documented as blaming "N lines ending at X".  In
practice, the behavior is achieved by swapping the two range endpoints
if the second is less than the first.  25ed3412 (Refactor parse_loc;
2013-03-28) broke this interpretation by removing the swapping code from
blame.c and failing to add it to line-range.c along with other code
relocated from blame.c. Thus, such a range is effectively treated as
empty.  Fix this regression.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Eric Sunshine 2013-07-17 17:25:27 -04:00 committed by Junio C Hamano
parent ed73fe5642
commit 3bf65f9e62
1 changed files with 7 additions and 0 deletions
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7
line-range.c
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@ -211,6 +211,8 @@ int parse_range_arg(const char *arg, nth_line_fn_t nth_line_cb,
void *cb_data, long lines, long *begin, long *end,
const char *path)
{
*begin = *end = 0;
if (*arg == ':') {
arg = parse_range_funcname(arg, nth_line_cb, cb_data, lines, begin, end, path);
if (!arg || *arg)
@ -226,6 +228,11 @@ int parse_range_arg(const char *arg, nth_line_fn_t nth_line_cb,
if (*arg)
return -1;
if (*begin && *end && *end < *begin) {
long tmp;
tmp = *end; *end = *begin; *begin = tmp;
}
return 0;
}