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[PATCH 3/8] grep: remove unused "prefix_length" member

From: Ævar Arnfjörð Bjarmason <hidden>
Date: 2021-11-06 21:11:06
Subsystem: the rest · Maintainer: Linus Torvalds

Remove the "prefix_length" member, which we compute with a strlen() on
the "prefix" argument to grep_init(), but whose strlen() hasn't been
used since 493b7a08d80 (grep: accept relative paths outside current
working directory, 2009-09-05).

When this code was added in 0d042fecf2f (git-grep: show pathnames
relative to the current directory, 2006-08-11) we used the length, but
since 493b7a08d80 we haven't used it for anything except a boolean
check that we could have done on the "prefix" member itself.

Before a preceding commit we also used to guard the strlen() with
"prefix && *prefix", but as that commit notes the RHS of that && chain
was also redundant.

Signed-off-by: Ævar Arnfjörð Bjarmason <redacted>
---
 builtin/grep.c | 4 ++--
 grep.c         | 1 -
 grep.h         | 1 -
 3 files changed, 2 insertions(+), 4 deletions(-)
diff --git a/builtin/grep.c b/builtin/grep.c
index 9e34a820ad4..bd4d2107351 100644
--- a/builtin/grep.c
+++ b/builtin/grep.c
@@ -315,7 +315,7 @@ static void grep_source_name(struct grep_opt *opt, const char *filename,
 	strbuf_reset(out);
 
 	if (opt->null_following_name) {
-		if (opt->relative && opt->prefix_length) {
+		if (opt->relative && opt->prefix) {
 			struct strbuf rel_buf = STRBUF_INIT;
 			const char *rel_name =
 				relative_path(filename + tree_name_len,
@@ -332,7 +332,7 @@ static void grep_source_name(struct grep_opt *opt, const char *filename,
 		return;
 	}
 
-	if (opt->relative && opt->prefix_length)
+	if (opt->relative && opt->prefix)
 		quote_path(filename + tree_name_len, opt->prefix, out, 0);
 	else
 		quote_c_style(filename + tree_name_len, out, NULL, 0);
diff --git a/grep.c b/grep.c
index 88ebc504630..755afb5f96d 100644
--- a/grep.c
+++ b/grep.c
@@ -145,7 +145,6 @@ void grep_init(struct grep_opt *opt, struct repository *repo, const char *prefix
 
 	opt->repo = repo;
 	opt->prefix = prefix;
-	opt->prefix_length = prefix ? strlen(prefix) : 0;
 	opt->pattern_tail = &opt->pattern_list;
 	opt->header_tail = &opt->header_list;
 }
diff --git a/grep.h b/grep.h
index 95cccb670f9..467d775b5a9 100644
--- a/grep.h
+++ b/grep.h
@@ -135,7 +135,6 @@ struct grep_opt {
 	struct repository *repo;
 
 	const char *prefix;
-	int prefix_length;
 	int linenum;
 	int columnnum;
 	int invert;
-- 
2.34.0.rc1.741.gab7bfd97031
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