[PATCH 5/9] use strip_suffix instead of ends_with in simple cases
From: Jeff King <hidden>
Date: 2016-06-15 23:01:46
Subsystem:
the rest · Maintainer:
Linus Torvalds
When stripping a suffix like:
if (ends_with(str, "foo"))
buf = xmemdupz(str, strlen(str) - 3);
we can instead use strip_suffix to avoid the constant 3,
which must match the literal "foo" (we sometimes use
strlen("foo") instead, but that means we are repeating
ourselves). The example above becomes:
if (strip_suffix(str, "foo", &len))
buf = xmemdupz(str, len);
This also saves a strlen(), since we calculate the string
length when detecting the suffix.
Note that in some cases we also switch from xstrndup to
xmemdupz, which saves a further strlen call.
Signed-off-by: Jeff King <redacted>
---
builtin/remote.c | 13 +++++++------
builtin/repack.c | 5 ++---
connected.c | 6 +++---
help.c | 5 ++---
4 files changed, 14 insertions(+), 15 deletions(-)
diff --git a/builtin/remote.c b/builtin/remote.c
index c9102e8..7c2999e 100644
--- a/builtin/remote.c
+++ b/builtin/remote.c@@ -265,16 +265,17 @@ static int config_read_branches(const char *key, const char *value, void *cb) struct string_list_item *item; struct branch_info *info; enum { REMOTE, MERGE, REBASE } type; + size_t key_len; key += 7; - if (ends_with(key, ".remote")) { - name = xstrndup(key, strlen(key) - 7); + if (strip_suffix(key, ".remote", &key_len)) { + name = xmemdupz(key, key_len); type = REMOTE; - } else if (ends_with(key, ".merge")) { - name = xstrndup(key, strlen(key) - 6); + } else if (strip_suffix(key, ".merge", &key_len)) { + name = xmemdupz(key, key_len); type = MERGE; - } else if (ends_with(key, ".rebase")) { - name = xstrndup(key, strlen(key) - 7); + } else if (strip_suffix(key, ".rebase", &key_len)) { + name = xmemdupz(key, key_len); type = REBASE; } else return 0;
diff --git a/builtin/repack.c b/builtin/repack.c
index ff2216a..a77e743 100644
--- a/builtin/repack.c
+++ b/builtin/repack.c@@ -83,16 +83,15 @@ static void get_non_kept_pack_filenames(struct string_list *fname_list) DIR *dir; struct dirent *e; char *fname; - size_t len; if (!(dir = opendir(packdir))) return; while ((e = readdir(dir)) != NULL) { - if (!ends_with(e->d_name, ".pack")) + size_t len; + if (!strip_suffix(e->d_name, ".pack", &len)) continue; - len = strlen(e->d_name) - strlen(".pack"); fname = xmemdupz(e->d_name, len); if (!file_exists(mkpath("%s/%s.keep", packdir, fname)))
diff --git a/connected.c b/connected.c
index be0253e..dae9c99 100644
--- a/connected.c
+++ b/connected.c@@ -31,6 +31,7 @@ static int check_everything_connected_real(sha1_iterate_fn fn, unsigned char sha1[20]; int err = 0, ac = 0; struct packed_git *new_pack = NULL; + size_t base_len; if (fn(cb_data, sha1)) return err;
@@ -38,10 +39,9 @@ static int check_everything_connected_real(sha1_iterate_fn fn, if (transport && transport->smart_options && transport->smart_options->self_contained_and_connected && transport->pack_lockfile && - ends_with(transport->pack_lockfile, ".keep")) { + strip_suffix(transport->pack_lockfile, ".keep", &base_len)) { struct strbuf idx_file = STRBUF_INIT; - strbuf_addstr(&idx_file, transport->pack_lockfile); - strbuf_setlen(&idx_file, idx_file.len - 5); /* ".keep" */ + strbuf_add(&idx_file, transport->pack_lockfile, base_len); strbuf_addstr(&idx_file, ".idx"); new_pack = add_packed_git(idx_file.buf, idx_file.len, 1); strbuf_release(&idx_file);
diff --git a/help.c b/help.c
index 372728f..97567c4 100644
--- a/help.c
+++ b/help.c@@ -145,7 +145,7 @@ static void list_commands_in_dir(struct cmdnames *cmds, len = buf.len; while ((de = readdir(dir)) != NULL) { - int entlen; + size_t entlen; if (!starts_with(de->d_name, prefix)) continue;
@@ -156,8 +156,7 @@ static void list_commands_in_dir(struct cmdnames *cmds, continue; entlen = strlen(de->d_name) - prefix_len; - if (ends_with(de->d_name, ".exe")) - entlen -= 4; + strip_suffix(de->d_name, ".exe", &entlen); add_cmdname(cmds, de->d_name + prefix_len, entlen); }
--
2.0.0.566.gfe3e6b2