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![Jeff King](/assets/img/avatar_default.png)
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>
74 lines
1.5 KiB
C
74 lines
1.5 KiB
C
#include "cache.h"
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static const char *usage_msg = "\n"
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" test-date show [time_t]...\n"
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" test-date parse [date]...\n"
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" test-date approxidate [date]...\n";
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static void show_dates(char **argv, struct timeval *now)
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{
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struct strbuf buf = STRBUF_INIT;
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for (; *argv; argv++) {
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time_t t = atoi(*argv);
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show_date_relative(t, 0, now, &buf);
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printf("%s -> %s\n", *argv, buf.buf);
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}
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strbuf_release(&buf);
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}
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static void parse_dates(char **argv, struct timeval *now)
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{
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struct strbuf result = STRBUF_INIT;
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for (; *argv; argv++) {
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unsigned long t;
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int tz;
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strbuf_reset(&result);
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parse_date(*argv, &result);
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if (sscanf(result.buf, "%lu %d", &t, &tz) == 2)
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printf("%s -> %s\n",
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*argv, show_date(t, tz, DATE_MODE(ISO8601)));
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else
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printf("%s -> bad\n", *argv);
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}
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strbuf_release(&result);
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}
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static void parse_approxidate(char **argv, struct timeval *now)
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{
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for (; *argv; argv++) {
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time_t t;
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t = approxidate_relative(*argv, now);
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printf("%s -> %s\n", *argv, show_date(t, 0, DATE_MODE(ISO8601)));
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}
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}
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int main(int argc, char **argv)
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{
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struct timeval now;
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const char *x;
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x = getenv("TEST_DATE_NOW");
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if (x) {
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now.tv_sec = atoi(x);
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now.tv_usec = 0;
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}
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else
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gettimeofday(&now, NULL);
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argv++;
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if (!*argv)
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usage(usage_msg);
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if (!strcmp(*argv, "show"))
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show_dates(argv+1, &now);
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else if (!strcmp(*argv, "parse"))
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parse_dates(argv+1, &now);
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else if (!strcmp(*argv, "approxidate"))
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parse_approxidate(argv+1, &now);
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else
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usage(usage_msg);
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return 0;
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}
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