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8e0f70033b
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>
86 lines
2.1 KiB
C
86 lines
2.1 KiB
C
#include "cache.h"
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#include "walker.h"
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int cmd_http_fetch(int argc, const char **argv, const char *prefix)
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{
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struct walker *walker;
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int commits_on_stdin = 0;
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int commits;
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const char **write_ref = NULL;
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char **commit_id;
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const char *url;
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char *rewritten_url = NULL;
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int arg = 1;
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int rc = 0;
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int get_tree = 0;
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int get_history = 0;
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int get_all = 0;
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int get_verbosely = 0;
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int get_recover = 0;
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git_config(git_default_config);
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while (arg < argc && argv[arg][0] == '-') {
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if (argv[arg][1] == 't') {
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get_tree = 1;
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} else if (argv[arg][1] == 'c') {
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get_history = 1;
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} else if (argv[arg][1] == 'a') {
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get_all = 1;
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get_tree = 1;
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get_history = 1;
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} else if (argv[arg][1] == 'v') {
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get_verbosely = 1;
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} else if (argv[arg][1] == 'w') {
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write_ref = &argv[arg + 1];
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arg++;
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} else if (!strcmp(argv[arg], "--recover")) {
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get_recover = 1;
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} else if (!strcmp(argv[arg], "--stdin")) {
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commits_on_stdin = 1;
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}
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arg++;
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}
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if (argc < arg + 2 - commits_on_stdin) {
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usage("git-http-fetch [-c] [-t] [-a] [-v] [--recover] [-w ref] [--stdin] commit-id url");
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return 1;
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}
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if (commits_on_stdin) {
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commits = walker_targets_stdin(&commit_id, &write_ref);
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} else {
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commit_id = (char **) &argv[arg++];
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commits = 1;
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}
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url = argv[arg];
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if (url && url[strlen(url)-1] != '/') {
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rewritten_url = malloc(strlen(url)+2);
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strcpy(rewritten_url, url);
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strcat(rewritten_url, "/");
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url = rewritten_url;
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}
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walker = get_http_walker(url);
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walker->get_tree = get_tree;
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walker->get_history = get_history;
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walker->get_all = get_all;
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walker->get_verbosely = get_verbosely;
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walker->get_recover = get_recover;
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rc = walker_fetch(walker, commits, commit_id, write_ref, url);
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if (commits_on_stdin)
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walker_targets_free(commits, commit_id, write_ref);
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if (walker->corrupt_object_found) {
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fprintf(stderr,
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"Some loose object were found to be corrupt, but they might be just\n"
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"a false '404 Not Found' error message sent with incorrect HTTP\n"
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"status code. Suggest running git-fsck.\n");
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}
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walker_free(walker);
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free(rewritten_url);
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return rc;
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}
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