This change removes all obvious useless if-before-free tests.
E.g., it replaces code like this:
if (some_expression)
free (some_expression);
with the now-equivalent:
free (some_expression);
It is equivalent not just because POSIX has required free(NULL)
to work for a long time, but simply because it has worked for
so long that no reasonable porting target fails the test.
Here's some evidence from nearly 1.5 years ago:
http://www.winehq.org/pipermail/wine-patches/2006-October/031544.html
FYI, the change below was prepared by running the following:
git ls-files -z | xargs -0 \
perl -0x3b -pi -e \
's/\bif\s*\(\s*(\S+?)(?:\s*!=\s*NULL)?\s*\)\s+(free\s*\(\s*\1\s*\))/$2/s'
Note however, that it doesn't handle brace-enclosed blocks like
"if (x) { free (x); }". But that's ok, since there were none like
that in git sources.
Beware: if you do use the above snippet, note that it can
produce syntactically invalid C code. That happens when the
affected "if"-statement has a matching "else".
E.g., it would transform this
if (x)
free (x);
else
foo ();
into this:
free (x);
else
foo ();
There were none of those here, either.
If you're interested in automating detection of the useless
tests, you might like the useless-if-before-free script in gnulib:
[it *does* detect brace-enclosed free statements, and has a --name=S
option to make it detect free-like functions with different names]
http://git.sv.gnu.org/gitweb/?p=gnulib.git;a=blob;f=build-aux/useless-if-before-free
Addendum:
Remove one more (in imap-send.c), spotted by Jean-Luc Herren <jlh@gmx.ch>.
Signed-off-by: Jim Meyering <meyering@redhat.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
static void origin_decref(struct origin *o)
{
if (o && --o->refcnt <= 0) {
- if (o->file.ptr)
- free(o->file.ptr);
+ free(o->file.ptr);
free(o);
}
}
continue;
}
- if (name)
- free(name);
+ free(name);
name = xstrdup(mkpath(fmt, argv[i]));
if (!resolve_ref(name, sha1, 1, NULL)) {
}
}
- if (name)
- free(name);
+ free(name);
return(ret);
}
if (write_ref_sha1(lock, sha1, msg) < 0)
die("Failed to write ref: %s.", strerror(errno));
- if (real_ref)
- free(real_ref);
+ free(real_ref);
}
static void rename_branch(const char *oldname, const char *newname, int force)
? strlen(reencoded) : message
? strlen(message) : 0),
reencoded ? reencoded : message ? message : "");
- if (reencoded)
- free(reencoded);
+ free(reencoded);
for (i = 0, p = commit->parents; p; p = p->next) {
int mark = get_object_mark(&p->item->object);
walker_free(walker);
- if (rewritten_url)
- free(rewritten_url);
+ free(rewritten_url);
return rc;
}
* accounting lock. Compiler will optimize the strangeness
* away when THREADED_DELTA_SEARCH is not defined.
*/
- if (trg_entry->delta_data)
- free(trg_entry->delta_data);
+ free(trg_entry->delta_data);
cache_lock();
if (trg_entry->delta_data) {
delta_cache_size -= trg_entry->delta_size;
else
return execl_git_cmd("commit", "-n", "-F", defmsg, NULL);
}
- if (reencoded_message)
- free(reencoded_message);
+ free(reencoded_message);
return 0;
}
name_len = strlen(name);
if (len != name_len + 41) {
- if (server_capabilities)
- free(server_capabilities);
+ free(server_capabilities);
server_capabilities = xstrdup(name + name_len + 1);
}
pp->next = funcname_pattern_list;
funcname_pattern_list = pp;
}
- if (pp->pattern)
- free(pp->pattern);
+ free(pp->pattern);
pp->pattern = xstrdup(value);
return 0;
}
ecbdata->diff_words->plus.text.size)
diff_words_show(ecbdata->diff_words);
- if (ecbdata->diff_words->minus.text.ptr)
- free (ecbdata->diff_words->minus.text.ptr);
- if (ecbdata->diff_words->plus.text.ptr)
- free (ecbdata->diff_words->plus.text.ptr);
+ free (ecbdata->diff_words->minus.text.ptr);
+ free (ecbdata->diff_words->plus.text.ptr);
free(ecbdata->diff_words);
ecbdata->diff_words = NULL;
}
static void free_simplify(struct path_simplify *simplify)
{
- if (simplify)
- free(simplify);
+ free(simplify);
}
int read_directory(struct dir_struct *dir, const char *path, const char *base, int baselen, const char **pathspec)
close(request->local_fileno);
if (request->local_stream)
fclose(request->local_stream);
- if (request->url != NULL)
- free(request->url);
+ free(request->url);
free(request);
}
strbuf_release(&in_buffer);
if (lock->token == NULL || lock->timeout <= 0) {
- if (lock->token != NULL)
- free(lock->token);
- if (lock->owner != NULL)
- free(lock->owner);
+ free(lock->token);
+ free(lock->owner);
free(url);
free(lock);
lock = NULL;
prev->next = prev->next->next;
}
- if (lock->owner != NULL)
- free(lock->owner);
+ free(lock->owner);
free(lock->url);
free(lock->token);
free(lock);
}
free(url);
- if (*symref != NULL)
- free(*symref);
+ free(*symref);
*symref = NULL;
hashclr(sha1);
}
cleanup:
- if (rewritten_url)
- free(rewritten_url);
+ free(rewritten_url);
if (info_ref_lock)
unlock_remote(info_ref_lock);
free(remote);
if (socket_write( &imap->buf.sock, buf, bufl ) != bufl) {
free( cmd->cmd );
free( cmd );
- if (cb && cb->data)
+ if (cb)
free( cb->data );
return NULL;
}
normal:
if (cmdp->cb.done)
cmdp->cb.done( ctx, cmdp, resp );
- if (cmdp->cb.data)
- free( cmdp->cb.data );
+ free( cmdp->cb.data );
free( cmdp->cmd );
free( cmdp );
if (!tcmd || tcmd == cmdp)
char *oldval = table[slot].value;
char *newval = NULL;
- if (oldval)
- free(oldval);
+ free(oldval);
if (value)
newval = xstrdup(value);
if (*arg == '=')
arg++;
if (!prefixcmp(arg, "format:")) {
- if (user_format)
- free(user_format);
+ free(user_format);
user_format = xstrdup(arg + 7);
return CMIT_FMT_USERFORMAT;
}
struct ref *next;
while (ref) {
next = ref->next;
- if (ref->peer_ref)
- free(ref->peer_ref);
+ free(ref->peer_ref);
free(ref);
ref = next;
}
} else if (strcmp(var, "core.worktree") == 0) {
if (!value)
return config_error_nonbool(var);
- if (git_work_tree_cfg)
- free(git_work_tree_cfg);
+ free(git_work_tree_cfg);
git_work_tree_cfg = xstrdup(value);
inside_work_tree = -1;
}
commit = pop_most_recent_commit(&list, ONELINE_SEEN);
if (!parse_object(commit->object.sha1))
continue;
- if (temp_commit_buffer)
- free(temp_commit_buffer);
+ free(temp_commit_buffer);
if (commit->buffer)
p = commit->buffer;
else {
break;
}
}
- if (temp_commit_buffer)
- free(temp_commit_buffer);
+ free(temp_commit_buffer);
free_commit_list(list);
for (l = backup; l; l = l->next)
clear_commit_marks(l->item, ONELINE_SEEN);
expression = value;
if (regcomp(®->re, expression, 0))
die("Invalid regexp to look for hunk header: %s", expression);
- if (buffer)
- free(buffer);
+ free(buffer);
value = ep + 1;
}
}