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grep.c: extract show_line_header() 

The grep code invokes show_line() to display the contents of a matched
or context line in its output. Part of this execution is to print a line
header that includes information such as the kind, the line- and
column-number and etc. of that match.

To prepare for the addition of an option to print only the matching
component(s) of a non-context line, we must prepare for the possibility
that a single line may contain multiple matching parts, and thus will
need multiple headers printed for a single line.

Extracting show_line_header allows us to do just that. In the subsequent
commit, it will be used within the colorization loop to print out only
the matching parts of a line, optionally with LFs delimiting
sub-matches.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
maint
Taylor Blau 2018-07-03 16:51:56 -05:00 committed by Junio C Hamano
parent 240cf2a257
commit c707ded332
1 changed files with 25 additions and 19 deletions
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44
grep.c
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@ -1410,26 +1410,9 @@ static int next_match(struct grep_opt *opt, char *bol, char *eol,
return hit;
}

static void show_line(struct grep_opt *opt, char *bol, char *eol,
const char *name, unsigned lno, ssize_t cno, char sign)
static void show_line_header(struct grep_opt *opt, const char *name,
unsigned lno, ssize_t cno, char sign)
{
int rest = eol - bol;
const char *match_color, *line_color = NULL;

if (opt->file_break && opt->last_shown == 0) {
if (opt->show_hunk_mark)
opt->output(opt, "\n", 1);
} else if (opt->pre_context || opt->post_context || opt->funcbody) {
if (opt->last_shown == 0) {
if (opt->show_hunk_mark) {
output_color(opt, "--", 2, opt->color_sep);
opt->output(opt, "\n", 1);
}
} else if (lno > opt->last_shown + 1) {
output_color(opt, "--", 2, opt->color_sep);
opt->output(opt, "\n", 1);
}
}
if (opt->heading && opt->last_shown == 0) {
output_color(opt, name, strlen(name), opt->color_filename);
opt->output(opt, "\n", 1);
@ -1457,6 +1440,29 @@ static void show_line(struct grep_opt *opt, char *bol, char *eol,
output_color(opt, buf, strlen(buf), opt->color_columnno);
output_sep(opt, sign);
}
}

static void show_line(struct grep_opt *opt, char *bol, char *eol,
const char *name, unsigned lno, ssize_t cno, char sign)
{
int rest = eol - bol;
const char *match_color, *line_color = NULL;

if (opt->file_break && opt->last_shown == 0) {
if (opt->show_hunk_mark)
opt->output(opt, "\n", 1);
} else if (opt->pre_context || opt->post_context || opt->funcbody) {
if (opt->last_shown == 0) {
if (opt->show_hunk_mark) {
output_color(opt, "--", 2, opt->color_sep);
opt->output(opt, "\n", 1);
}
} else if (lno > opt->last_shown + 1) {
output_color(opt, "--", 2, opt->color_sep);
opt->output(opt, "\n", 1);
}
}
show_line_header(opt, name, lno, cno, sign);
if (opt->color) {
regmatch_t match;
enum grep_context ctx = GREP_CONTEXT_BODY;