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grep.c: display column number of first match 

To prepare for 'git grep' learning '--column', teach grep.c's
show_line() how to show the column of the first match on non-context
lines.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Taylor Blau 2018-06-22 10:49:42 -05:00 committed by Junio C Hamano
parent 017c0fcfdb
commit 89252cd069
1 changed files with 28 additions and 5 deletions
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33
grep.c
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@ -1405,7 +1405,7 @@ static int next_match(struct grep_opt *opt, char *bol, char *eol,
}

static void show_line(struct grep_opt *opt, char *bol, char *eol,
const char *name, unsigned lno, char sign)
const char *name, unsigned lno, ssize_t cno, char sign)
{
int rest = eol - bol;
const char *match_color, *line_color = NULL;
@ -1440,6 +1440,17 @@ static void show_line(struct grep_opt *opt, char *bol, char *eol,
output_color(opt, buf, strlen(buf), opt->color_lineno);
output_sep(opt, sign);
}
/*
* Treat 'cno' as the 1-indexed offset from the start of a non-context
* line to its first match. Otherwise, 'cno' is 0 indicating that we are
* being called with a context line.
*/
if (opt->columnnum && cno) {
char buf[32];
xsnprintf(buf, sizeof(buf), "%"PRIuMAX, (uintmax_t)cno);
output_color(opt, buf, strlen(buf), opt->color_columnno);
output_sep(opt, sign);
}
if (opt->color) {
regmatch_t match;
enum grep_context ctx = GREP_CONTEXT_BODY;
@ -1545,7 +1556,7 @@ static void show_funcname_line(struct grep_opt *opt, struct grep_source *gs,
break;

if (match_funcname(opt, gs, bol, eol)) {
show_line(opt, bol, eol, gs->name, lno, '=');
show_line(opt, bol, eol, gs->name, lno, 0, '=');
break;
}
}
@ -1610,7 +1621,7 @@ static void show_pre_context(struct grep_opt *opt, struct grep_source *gs,

while (*eol != '\n')
eol++;
show_line(opt, bol, eol, gs->name, cur, sign);
show_line(opt, bol, eol, gs->name, cur, 0, sign);
bol = eol + 1;
cur++;
}
@ -1809,6 +1820,7 @@ static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int colle
while (left) {
char *eol, ch;
int hit;
ssize_t cno;
ssize_t col = -1, icol = -1;

/*
@ -1874,7 +1886,18 @@ static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int colle
show_pre_context(opt, gs, bol, eol, lno);
else if (opt->funcname)
show_funcname_line(opt, gs, bol, lno);
show_line(opt, bol, eol, gs->name, lno, ':');
cno = opt->invert ? icol : col;
if (cno < 0) {
/*
* A negative cno indicates that there was no
* match on the line. We are thus inverted and
* being asked to show all lines that _don't_
* match a given expression. Therefore, set cno
* to 0 to suggest the whole line matches.
*/
cno = 0;
}
show_line(opt, bol, eol, gs->name, lno, cno + 1, ':');
last_hit = lno;
if (opt->funcbody)
show_function = 1;
@ -1903,7 +1926,7 @@ static int grep_source_1(struct grep_opt *opt, struct grep_source *gs, int colle
/* If the last hit is within the post context,
* we need to show this line.
*/
show_line(opt, bol, eol, gs->name, lno, '-');
show_line(opt, bol, eol, gs->name, lno, col + 1, '-');
}

next_line: