git/test-revision-walking.c

67 строки
1.4 KiB
C
Исходник Обычный вид История

/*
* test-revision-walking.c: test revision walking API.
*
* (C) 2012 Heiko Voigt <hvoigt@hvoigt.net>
*
* This code is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include "cache.h"
#include "commit.h"
#include "diff.h"
#include "revision.h"
static void print_commit(struct commit *commit)
{
struct strbuf sb = STRBUF_INIT;
struct pretty_print_context ctx = {0};
convert "enum date_mode" into a struct In preparation for adding date modes that may carry extra information beyond the mode itself, this patch converts the date_mode enum into a struct. Most of the conversion is fairly straightforward; we pass the struct as a pointer and dereference the type field where necessary. Locations that declare a date_mode can use a "{}" constructor. However, the tricky case is where we use the enum labels as constants, like: show_date(t, tz, DATE_NORMAL); Ideally we could say: show_date(t, tz, &{ DATE_NORMAL }); but of course C does not allow that. Likewise, we cannot cast the constant to a struct, because we need to pass an actual address. Our options are basically: 1. Manually add a "struct date_mode d = { DATE_NORMAL }" definition to each caller, and pass "&d". This makes the callers uglier, because they sometimes do not even have their own scope (e.g., they are inside a switch statement). 2. Provide a pre-made global "date_normal" struct that can be passed by address. We'd also need "date_rfc2822", "date_iso8601", and so forth. But at least the ugliness is defined in one place. 3. Provide a wrapper that generates the correct struct on the fly. The big downside is that we end up pointing to a single global, which makes our wrapper non-reentrant. But show_date is already not reentrant, so it does not matter. This patch implements 3, along with a minor macro to keep the size of the callers sane. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-06-25 19:55:02 +03:00
ctx.date_mode.type = DATE_NORMAL;
format_commit_message(commit, " %m %s", &sb, &ctx);
printf("%s\n", sb.buf);
strbuf_release(&sb);
}
static int run_revision_walk(void)
{
struct rev_info rev;
struct commit *commit;
const char *argv[] = {NULL, "--all", NULL};
int argc = ARRAY_SIZE(argv) - 1;
int got_revision = 0;
init_revisions(&rev, NULL);
setup_revisions(argc, argv, &rev, NULL);
if (prepare_revision_walk(&rev))
die("revision walk setup failed");
while ((commit = get_revision(&rev)) != NULL) {
print_commit(commit);
got_revision = 1;
}
reset_revision_walk();
return got_revision;
}
int main(int argc, char **argv)
{
if (argc < 2)
return 1;
if (!strcmp(argv[1], "run-twice")) {
printf("1st\n");
if (!run_revision_walk())
return 1;
printf("2nd\n");
if (!run_revision_walk())
return 1;
return 0;
}
fprintf(stderr, "check usage\n");
return 1;
}