mirror of
https://git.pumpin.online/funkpower/typikon.git
synced 2026-10-22 18:57:13 +00:00
funkpower
d90d4c171f
Every desktop shell that reads typikon today runs the binary and parses its JSON. That costs about 1.5ms and is the right answer for a calendar that changes once a day, but it is the wrong shape for anything with an FFI and no business spawning a process on every redraw. Dates cross as Julian Day Numbers, so no struct layout is part of the contract. A day is opaque and owns its strings, built once when it is reckoned: an accessor returns the same borrowed pointer every time, so a statusline polling one in a loop allocates nothing. The accessors carry every field of the JSON, so nothing on the other side needs a parser. The Python bindings and this were resolving a jurisdiction by two copies of the same logic, and the copy here leaked one per call. Both now share jurisdictions::resolve_full, which interns the combinations instead. The header is a promise made in a second file, and a second file drifts: a test reads both and fails if either has a symbol the other does not, and does the same for the LuaJIT cdef, where a stale declaration is a segfault rather than a compile error.
87 lines
3.3 KiB
C
87 lines
3.3 KiB
C
/* Build:
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* cargo build --release --features capi
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* cc -Iinclude examples/c/demo.c -Ltarget/release -ltypikon -o /tmp/demo
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* LD_LIBRARY_PATH=target/release /tmp/demo rocor
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*
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* With no arguments it uses the remembered default; with --list it prints
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* every jurisdiction it knows.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <typikon.h>
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static void show(int32_t jdn, const char *jurisdiction) {
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typikon_day *d = typikon_describe(jdn, jurisdiction);
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if (!d) {
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fprintf(stderr, " %s\n", typikon_last_error());
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return;
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}
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const char *season = typikon_day_season(d);
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const char *sign = typikon_day_sign(d);
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printf(" %-12s %-14s %-4s %-28s %s%s%s\n",
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jurisdiction ? jurisdiction : "(default)",
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typikon_day_church_date(d),
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typikon_day_emoji(d),
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typikon_day_fast_label(d),
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sign ? sign : "",
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typikon_day_title(d),
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typikon_day_is_obligatory(d) ? " [obligatory]" : "");
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if (season) printf(" season: %s\n", season);
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/* The title is the feast, or the first commemoration where there is no
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feast, so start past it rather than printing it twice. */
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uint32_t start = typikon_day_feast(d) ? 0 : 1;
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for (uint32_t i = start; i < typikon_day_commemoration_count(d); i++)
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printf(" also %s\n", typikon_day_commemoration(d, i));
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typikon_day_free(d);
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}
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static void list(void) {
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for (uint32_t i = 0; i < typikon_jurisdiction_count(); i++)
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printf(" %-18s %s\n", typikon_jurisdiction_key(i),
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typikon_jurisdiction_name(i));
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}
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int main(int argc, char **argv) {
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printf("typikon %s, ABI %u\n\n", typikon_version(), typikon_abi_version());
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if (argc == 2 && strcmp(argv[1], "--list") == 0) {
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list();
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return 0;
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}
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int32_t today = typikon_today();
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for (int i = 1; i < argc; i++) show(today, argv[i]);
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if (argc == 1) show(today, NULL);
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/* A day with something to say: the first day of the Great Fast, 2026,
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under Byzantine Catholic law and then at the Typikon's discipline. */
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int32_t clean_monday = typikon_jdn_from_ymd(2026, 2, 16);
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printf("\n Clean Monday 2026:\n");
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typikon_day *law = typikon_describe_full(clean_monday, "ruthenian", NULL, 0);
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typikon_day *fast = typikon_describe_full(clean_monday, "ruthenian", NULL, 1);
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printf(" law %-30s binds %s\n",
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typikon_day_fast_label(law),
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typikon_day_binds(law) ? typikon_day_binds(law) : "nothing");
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printf(" typikon %-30s binds %s\n",
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typikon_day_fast_label(fast),
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typikon_day_binds(fast) ? typikon_day_binds(fast) : "nothing");
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typikon_day_free(law);
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typikon_day_free(fast);
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/* Pascha without reckoning a day for it. */
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int32_t p = typikon_pascha(2026, "old");
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int32_t y, dd;
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uint32_t m, d2;
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typikon_ymd_from_jdn(p, &y, &m, &d2);
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dd = p - typikon_today();
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printf("\n Pascha 2026 (Julian paschalion): %04d-%02u-%02u, %d days from today\n",
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y, m, d2, dd);
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/* Errors do not crash. */
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if (!typikon_describe(today, "atlantis"))
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printf("\n bad jurisdiction: %s\n", typikon_last_error());
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if (!typikon_jdn_from_ymd(2026, 2, 30))
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printf(" bad date : %s\n", typikon_last_error());
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return 0;
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}
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