ls-tree: remove dead store and strbuf for quote_c_style()

Stop initializing "name" because it is set again before use. Let quote_c_style() write directly to "sb" instead of taking a detour through "quoted". This avoids an allocation and a string copy. The result is the same because the function only appends. Signed-off-by: René Scharfe <l.s.r@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>

René Scharfe committed Jan 14, 2023 at 16:03 UTC c388fcda9943c0cf46960787041a1ff3bcf5e833
1 file changed +2 -5
builtin/ls-tree.c
+2 -5
@@ -93,19 +93,16 @@ static size_t expand_show_tree(struct strbuf *sb, const char *start,
93 } else if (skip_prefix(start, "(objectname)", &p)) {
94 strbuf_add_unique_abbrev(sb, data->oid, abbrev);
95 } else if (skip_prefix(start, "(path)", &p)) {
96 - const char *name = data->base->buf;
96 + const char *name;
97 const char *prefix = chomp_prefix ? ls_tree_prefix : NULL;
98 - struct strbuf quoted = STRBUF_INIT;
98 struct strbuf sbuf = STRBUF_INIT;
99 size_t baselen = data->base->len;
100
101 strbuf_addstr(data->base, data->pathname);
102 name = relative_path(data->base->buf, prefix, &sbuf);
104 - quote_c_style(name, &quoted, NULL, 0);
103 + quote_c_style(name, sb, NULL, 0);
104 strbuf_setlen(data->base, baselen);
106 - strbuf_addbuf(sb, &quoted);
105 strbuf_release(&sbuf);
108 - strbuf_release(&quoted);
106 } else {
107 errlen = (unsigned long)len;
108 die(_("bad ls-tree format: %%%.*s"), errlen, start);