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authorBo Yang <struggleyb.nku@gmail.com>2013-03-28 16:47:30 (GMT)
committerJunio C Hamano <gitster@pobox.com>2013-03-28 17:28:41 (GMT)
commit25ed3412f86b136efb17689b6712d9e546cac388 (patch)
treefdb5d94dcd935ce30be00a616ff1619752421179 /builtin/blame.c
parent443d803e0dacd0a1c6700503689f3cd95751aba1 (diff)
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Refactor parse_loc
We want to use the same style of -L n,m argument for 'git log -L' as for git-blame. Refactor the argument parsing of the range arguments from builtin/blame.c to the (new) file that will hold the 'git log -L' logic. To accommodate different data structures in blame and log -L, the file contents are abstracted away; parse_range_arg takes a callback that it uses to get the contents of a line of the (notional) file. The new test is for a case that made me pause during debugging: the 'blame -L with invalid end' test was the only one that noticed an outright failure to parse the end *at all*. So make a more explicit test for that. Signed-off-by: Bo Yang <struggleyb.nku@gmail.com> Signed-off-by: Thomas Rast <trast@student.ethz.ch> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'builtin/blame.c')
-rw-r--r--builtin/blame.c99
1 files changed, 8 insertions, 91 deletions
diff --git a/builtin/blame.c b/builtin/blame.c
index 86100e9..20eb439 100644
--- a/builtin/blame.c
+++ b/builtin/blame.c
@@ -21,6 +21,7 @@
#include "parse-options.h"
#include "utf8.h"
#include "userdiff.h"
+#include "line-range.h"
static char blame_usage[] = N_("git blame [options] [rev-opts] [rev] [--] file");
@@ -566,11 +567,16 @@ static void dup_entry(struct blame_entry *dst, struct blame_entry *src)
dst->score = 0;
}
-static const char *nth_line(struct scoreboard *sb, int lno)
+static const char *nth_line(struct scoreboard *sb, long lno)
{
return sb->final_buf + sb->lineno[lno];
}
+static const char *nth_line_cb(void *data, long lno)
+{
+ return nth_line((struct scoreboard *)data, lno);
+}
+
/*
* It is known that lines between tlno to same came from parent, and e
* has an overlap with that range. it also is known that parent's
@@ -1927,83 +1933,6 @@ static const char *add_prefix(const char *prefix, const char *path)
}
/*
- * Parsing of (comma separated) one item in the -L option
- */
-static const char *parse_loc(const char *spec,
- struct scoreboard *sb, long lno,
- long begin, long *ret)
-{
- char *term;
- const char *line;
- long num;
- int reg_error;
- regex_t regexp;
- regmatch_t match[1];
-
- /* Allow "-L <something>,+20" to mean starting at <something>
- * for 20 lines, or "-L <something>,-5" for 5 lines ending at
- * <something>.
- */
- if (1 < begin && (spec[0] == '+' || spec[0] == '-')) {
- num = strtol(spec + 1, &term, 10);
- if (term != spec + 1) {
- if (spec[0] == '-')
- num = 0 - num;
- if (0 < num)
- *ret = begin + num - 2;
- else if (!num)
- *ret = begin;
- else
- *ret = begin + num;
- return term;
- }
- return spec;
- }
- num = strtol(spec, &term, 10);
- if (term != spec) {
- *ret = num;
- return term;
- }
- if (spec[0] != '/')
- return spec;
-
- /* it could be a regexp of form /.../ */
- for (term = (char *) spec + 1; *term && *term != '/'; term++) {
- if (*term == '\\')
- term++;
- }
- if (*term != '/')
- return spec;
-
- /* try [spec+1 .. term-1] as regexp */
- *term = 0;
- begin--; /* input is in human terms */
- line = nth_line(sb, begin);
-
- if (!(reg_error = regcomp(&regexp, spec + 1, REG_NEWLINE)) &&
- !(reg_error = regexec(&regexp, line, 1, match, 0))) {
- const char *cp = line + match[0].rm_so;
- const char *nline;
-
- while (begin++ < lno) {
- nline = nth_line(sb, begin);
- if (line <= cp && cp < nline)
- break;
- line = nline;
- }
- *ret = begin;
- regfree(&regexp);
- *term++ = '/';
- return term;
- }
- else {
- char errbuf[1024];
- regerror(reg_error, &regexp, errbuf, 1024);
- die("-L parameter '%s': %s", spec + 1, errbuf);
- }
-}
-
-/*
* Parsing of -L option
*/
static void prepare_blame_range(struct scoreboard *sb,
@@ -2011,15 +1940,7 @@ static void prepare_blame_range(struct scoreboard *sb,
long lno,
long *bottom, long *top)
{
- const char *term;
-
- term = parse_loc(bottomtop, sb, lno, 1, bottom);
- if (*term == ',') {
- term = parse_loc(term + 1, sb, lno, *bottom + 1, top);
- if (*term)
- usage(blame_usage);
- }
- if (*term)
+ if (parse_range_arg(bottomtop, nth_line_cb, sb, lno, bottom, top))
usage(blame_usage);
}
@@ -2569,10 +2490,6 @@ parse_done:
bottom = top = 0;
if (bottomtop)
prepare_blame_range(&sb, bottomtop, lno, &bottom, &top);
- if (bottom && top && top < bottom) {
- long tmp;
- tmp = top; top = bottom; bottom = tmp;
- }
if (bottom < 1)
bottom = 1;
if (top < 1)