[PATCH 1/2] grep.c: extract show_line_header()
- From
Taylor Blau <me@ttaylorr.com>
- Date
- Jun 25, 2018, 21:25 UTC
- Message-ID
- <62e19e5583e30117b6754be5de5582a07c9e78dc.1529961706.git.me@ttaylorr.com>
- In-Reply-To
- <cover.1529961706.git.me@ttaylorr.com>
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> --- grep.c | 44 +++++++++++++++++++++++++------------------- 1 file changed, 25 insertions(+), 19 deletions(-)
diff --git a/grep.c b/grep.c index 992673fe7e..4ff8a73043 100644 --- a/grep.c +++ b/grep.c @@ -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; -- 2.18.0