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a5481a6c94
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>
67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
/*
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* test-revision-walking.c: test revision walking API.
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*
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* (C) 2012 Heiko Voigt <hvoigt@hvoigt.net>
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*
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* This code is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include "cache.h"
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#include "commit.h"
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#include "diff.h"
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#include "revision.h"
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static void print_commit(struct commit *commit)
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{
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struct strbuf sb = STRBUF_INIT;
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struct pretty_print_context ctx = {0};
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ctx.date_mode.type = DATE_NORMAL;
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format_commit_message(commit, " %m %s", &sb, &ctx);
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printf("%s\n", sb.buf);
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strbuf_release(&sb);
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}
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static int run_revision_walk(void)
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{
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struct rev_info rev;
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struct commit *commit;
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const char *argv[] = {NULL, "--all", NULL};
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int argc = ARRAY_SIZE(argv) - 1;
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int got_revision = 0;
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init_revisions(&rev, NULL);
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setup_revisions(argc, argv, &rev, NULL);
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if (prepare_revision_walk(&rev))
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die("revision walk setup failed");
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while ((commit = get_revision(&rev)) != NULL) {
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print_commit(commit);
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got_revision = 1;
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}
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reset_revision_walk();
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return got_revision;
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}
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int main(int argc, char **argv)
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{
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if (argc < 2)
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return 1;
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if (!strcmp(argv[1], "run-twice")) {
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printf("1st\n");
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if (!run_revision_walk())
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return 1;
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printf("2nd\n");
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if (!run_revision_walk())
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return 1;
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return 0;
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}
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fprintf(stderr, "check usage\n");
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return 1;
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}
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