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![René Scharfe](/assets/img/avatar_default.png)
date_mode_from_type() modifies a static variable and returns a pointer to it. This is not thread-safe. Most callers of date_mode_from_type() use it via the macro DATE_MODE and pass its result on to functions like show_date(), which take a const pointer and don't modify the struct. Avoid the static storage by putting the variable on the stack and returning the whole struct date_mode. Change functions that take a constant pointer to expect the whole struct instead. Reduce the cost of passing struct date_mode around on 64-bit systems by reordering its members to close the hole between the 32-bit wide .type and the 64-bit aligned .strftime_fmt as well as the alignment hole at the end. sizeof reports 24 before and 16 with this change on x64. Keep .type at the top to still allow initialization without designator -- though that's only done in a single location, in builtin/blame.c. Signed-off-by: René Scharfe <l.s.r@web.de> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
371 lines
8.6 KiB
C
371 lines
8.6 KiB
C
#include "git-compat-util.h"
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#include "commit.h"
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#include "refs.h"
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#include "diff.h"
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#include "repository.h"
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#include "revision.h"
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#include "string-list.h"
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#include "reflog-walk.h"
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struct complete_reflogs {
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char *ref;
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char *short_ref;
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struct reflog_info {
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struct object_id ooid, noid;
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char *email;
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timestamp_t timestamp;
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int tz;
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char *message;
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} *items;
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int nr, alloc;
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};
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static int read_one_reflog(struct object_id *ooid, struct object_id *noid,
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const char *email, timestamp_t timestamp, int tz,
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const char *message, void *cb_data)
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{
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struct complete_reflogs *array = cb_data;
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struct reflog_info *item;
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ALLOC_GROW(array->items, array->nr + 1, array->alloc);
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item = array->items + array->nr;
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oidcpy(&item->ooid, ooid);
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oidcpy(&item->noid, noid);
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item->email = xstrdup(email);
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item->timestamp = timestamp;
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item->tz = tz;
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item->message = xstrdup(message);
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array->nr++;
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return 0;
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}
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static void free_complete_reflog(struct complete_reflogs *array)
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{
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int i;
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if (!array)
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return;
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for (i = 0; i < array->nr; i++) {
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free(array->items[i].email);
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free(array->items[i].message);
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}
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free(array->items);
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free(array->ref);
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free(array->short_ref);
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free(array);
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}
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static void complete_reflogs_clear(void *util, const char *str UNUSED)
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{
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struct complete_reflogs *array = util;
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free_complete_reflog(array);
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}
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static struct complete_reflogs *read_complete_reflog(const char *ref)
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{
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struct complete_reflogs *reflogs =
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xcalloc(1, sizeof(struct complete_reflogs));
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reflogs->ref = xstrdup(ref);
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for_each_reflog_ent(ref, read_one_reflog, reflogs);
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if (reflogs->nr == 0) {
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const char *name;
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void *name_to_free;
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name = name_to_free = resolve_refdup(ref, RESOLVE_REF_READING,
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NULL, NULL);
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if (name) {
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for_each_reflog_ent(name, read_one_reflog, reflogs);
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free(name_to_free);
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}
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}
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if (reflogs->nr == 0) {
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char *refname = xstrfmt("refs/%s", ref);
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for_each_reflog_ent(refname, read_one_reflog, reflogs);
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if (reflogs->nr == 0) {
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free(refname);
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refname = xstrfmt("refs/heads/%s", ref);
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for_each_reflog_ent(refname, read_one_reflog, reflogs);
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}
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free(refname);
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}
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return reflogs;
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}
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static int get_reflog_recno_by_time(struct complete_reflogs *array,
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timestamp_t timestamp)
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{
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int i;
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for (i = array->nr - 1; i >= 0; i--)
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if (timestamp >= array->items[i].timestamp)
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return i;
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return -1;
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}
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struct commit_reflog {
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int recno;
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enum selector_type {
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SELECTOR_NONE,
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SELECTOR_INDEX,
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SELECTOR_DATE
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} selector;
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struct complete_reflogs *reflogs;
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};
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struct reflog_walk_info {
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struct commit_reflog **logs;
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size_t nr, alloc;
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struct string_list complete_reflogs;
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struct commit_reflog *last_commit_reflog;
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};
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void init_reflog_walk(struct reflog_walk_info **info)
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{
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CALLOC_ARRAY(*info, 1);
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(*info)->complete_reflogs.strdup_strings = 1;
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}
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void reflog_walk_info_release(struct reflog_walk_info *info)
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{
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size_t i;
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if (!info)
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return;
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for (i = 0; i < info->nr; i++)
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free(info->logs[i]);
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string_list_clear_func(&info->complete_reflogs,
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complete_reflogs_clear);
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free(info->logs);
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free(info);
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}
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int add_reflog_for_walk(struct reflog_walk_info *info,
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struct commit *commit, const char *name)
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{
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timestamp_t timestamp = 0;
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int recno = -1;
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struct string_list_item *item;
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struct complete_reflogs *reflogs;
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char *branch, *at = strchr(name, '@');
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struct commit_reflog *commit_reflog;
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enum selector_type selector = SELECTOR_NONE;
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if (commit->object.flags & UNINTERESTING)
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die("cannot walk reflogs for %s", name);
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branch = xstrdup(name);
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if (at && at[1] == '{') {
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char *ep;
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branch[at - name] = '\0';
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recno = strtoul(at + 2, &ep, 10);
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if (*ep != '}') {
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recno = -1;
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timestamp = approxidate(at + 2);
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selector = SELECTOR_DATE;
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}
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else
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selector = SELECTOR_INDEX;
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} else
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recno = 0;
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item = string_list_lookup(&info->complete_reflogs, branch);
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if (item)
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reflogs = item->util;
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else {
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if (*branch == '\0') {
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free(branch);
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branch = resolve_refdup("HEAD", 0, NULL, NULL);
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if (!branch)
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die("no current branch");
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}
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reflogs = read_complete_reflog(branch);
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if (!reflogs || reflogs->nr == 0) {
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char *b;
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int ret = dwim_log(branch, strlen(branch),
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NULL, &b);
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if (ret > 1)
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free(b);
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else if (ret == 1) {
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free_complete_reflog(reflogs);
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free(branch);
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branch = b;
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reflogs = read_complete_reflog(branch);
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}
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}
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if (!reflogs || reflogs->nr == 0) {
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free_complete_reflog(reflogs);
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free(branch);
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return -1;
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}
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string_list_insert(&info->complete_reflogs, branch)->util
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= reflogs;
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}
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free(branch);
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CALLOC_ARRAY(commit_reflog, 1);
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if (recno < 0) {
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commit_reflog->recno = get_reflog_recno_by_time(reflogs, timestamp);
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if (commit_reflog->recno < 0) {
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free(commit_reflog);
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return -1;
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}
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} else
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commit_reflog->recno = reflogs->nr - recno - 1;
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commit_reflog->selector = selector;
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commit_reflog->reflogs = reflogs;
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ALLOC_GROW(info->logs, info->nr + 1, info->alloc);
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info->logs[info->nr++] = commit_reflog;
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return 0;
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}
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void get_reflog_selector(struct strbuf *sb,
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struct reflog_walk_info *reflog_info,
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struct date_mode dmode, int force_date,
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int shorten)
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{
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struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
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struct reflog_info *info;
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const char *printed_ref;
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if (!commit_reflog)
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return;
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if (shorten) {
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if (!commit_reflog->reflogs->short_ref)
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commit_reflog->reflogs->short_ref
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= shorten_unambiguous_ref(commit_reflog->reflogs->ref, 0);
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printed_ref = commit_reflog->reflogs->short_ref;
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} else {
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printed_ref = commit_reflog->reflogs->ref;
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}
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strbuf_addf(sb, "%s@{", printed_ref);
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if (commit_reflog->selector == SELECTOR_DATE ||
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(commit_reflog->selector == SELECTOR_NONE && force_date)) {
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info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
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strbuf_addstr(sb, show_date(info->timestamp, info->tz, dmode));
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} else {
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strbuf_addf(sb, "%d", commit_reflog->reflogs->nr
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- 2 - commit_reflog->recno);
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}
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strbuf_addch(sb, '}');
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}
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void get_reflog_message(struct strbuf *sb,
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struct reflog_walk_info *reflog_info)
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{
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struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
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struct reflog_info *info;
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size_t len;
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if (!commit_reflog)
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return;
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info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
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len = strlen(info->message);
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if (len > 0)
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len--; /* strip away trailing newline */
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strbuf_add(sb, info->message, len);
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}
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const char *get_reflog_ident(struct reflog_walk_info *reflog_info)
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{
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struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
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struct reflog_info *info;
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if (!commit_reflog)
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return NULL;
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info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
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return info->email;
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}
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timestamp_t get_reflog_timestamp(struct reflog_walk_info *reflog_info)
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{
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struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
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struct reflog_info *info;
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if (!commit_reflog)
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return 0;
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info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
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return info->timestamp;
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}
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void show_reflog_message(struct reflog_walk_info *reflog_info, int oneline,
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struct date_mode dmode, int force_date)
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{
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if (reflog_info && reflog_info->last_commit_reflog) {
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struct commit_reflog *commit_reflog = reflog_info->last_commit_reflog;
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struct reflog_info *info;
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struct strbuf selector = STRBUF_INIT;
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info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
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get_reflog_selector(&selector, reflog_info, dmode, force_date, 0);
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if (oneline) {
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printf("%s: %s", selector.buf, info->message);
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}
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else {
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printf("Reflog: %s (%s)\nReflog message: %s",
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selector.buf, info->email, info->message);
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}
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strbuf_release(&selector);
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}
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}
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int reflog_walk_empty(struct reflog_walk_info *info)
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{
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return !info || !info->nr;
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}
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static struct commit *next_reflog_commit(struct commit_reflog *log)
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{
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for (; log->recno >= 0; log->recno--) {
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struct reflog_info *entry = &log->reflogs->items[log->recno];
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struct object *obj = parse_object(the_repository,
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&entry->noid);
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if (obj && obj->type == OBJ_COMMIT)
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return (struct commit *)obj;
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}
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return NULL;
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}
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static timestamp_t log_timestamp(struct commit_reflog *log)
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{
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return log->reflogs->items[log->recno].timestamp;
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}
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struct commit *next_reflog_entry(struct reflog_walk_info *walk)
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{
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struct commit_reflog *best = NULL;
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struct commit *best_commit = NULL;
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size_t i;
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for (i = 0; i < walk->nr; i++) {
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struct commit_reflog *log = walk->logs[i];
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struct commit *commit = next_reflog_commit(log);
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if (!commit)
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continue;
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if (!best || log_timestamp(log) > log_timestamp(best)) {
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best = log;
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best_commit = commit;
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}
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}
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if (best) {
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best->recno--;
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walk->last_commit_reflog = best;
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return best_commit;
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}
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return NULL;
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}
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