Add when

When? Now.

1 files changed, 0 insertions, 213 deletions

diff --git a/bin/ddc.y b/bin/ddc.y
deleted file mode 100644
index 35e1b398..00000000
--- a/bin/ddc.y
+++ /dev/null
@@ -1,213 +0,0 @@
-/* Copyright (C) 2019  June McEnroe <june@causal.agency>
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-%{
-
-#include <ctype.h>
-#include <err.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <strings.h>
-#include <sysexits.h>
-#include <time.h>
-
-static void yyerror(const char *str);
-static int yylex(void);
-
-#define YYSTYPE struct tm
-
-static struct tm normalize(struct tm date) {
-	time_t time = mktime(&date);
-	struct tm *norm = localtime(&time);
-	if (!norm) err(EX_OSERR, "localtime");
-	return *norm;
-}
-
-static struct tm today(void) {
-	time_t now = time(NULL);
-	struct tm *date = localtime(&now);
-	if (!date) err(EX_OSERR, "localtime");
-	date->tm_hour = date->tm_min = date->tm_sec = 0;
-	return *date;
-}
-
-static struct tm monthDay(int month, int day) {
-	struct tm date = today();
-	date.tm_mon = month;
-	date.tm_mday = day;
-	return normalize(date);
-}
-
-static struct tm monthDayYear(int month, int day, int year) {
-	struct tm date = {
-		.tm_mon = month,
-		.tm_mday = day,
-		.tm_year = year - 1900,
-	};
-	return normalize(date);
-}
-
-static struct tm weekDay(int day) {
-	struct tm date = today();
-	date.tm_mday += day - date.tm_wday;
-	return normalize(date);
-}
-
-static struct tm scalarAdd(struct tm a, struct tm b) {
-	a.tm_mday += b.tm_mday;
-	a.tm_mon += b.tm_mon;
-	a.tm_year += b.tm_year;
-	return a;
-}
-
-static struct tm scalarSub(struct tm a, struct tm b) {
-	a.tm_mday -= b.tm_mday;
-	a.tm_mon -= b.tm_mon;
-	a.tm_year -= b.tm_year;
-	return a;
-}
-
-static struct tm dateAdd(struct tm date, struct tm scalar) {
-	return normalize(scalarAdd(date, scalar));
-}
-
-static struct tm dateSub(struct tm date, struct tm scalar) {
-	return normalize(scalarSub(date, scalar));
-}
-
-static struct tm dateDiff(struct tm a, struct tm b) {
-	struct tm diff = { .tm_year = a.tm_year - b.tm_year };
-	if (a.tm_mday < b.tm_mday) {
-		diff.tm_mon = a.tm_mon - b.tm_mon - 1;
-		while (dateAdd(b, diff).tm_mday != a.tm_mday) diff.tm_mday++;
-	} else {
-		diff.tm_mon = a.tm_mon - b.tm_mon;
-		diff.tm_mday = a.tm_mday - b.tm_mday;
-	}
-	return diff;
-}
-
-static const char *Days[7] = {
-	"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",
-};
-
-static const char *Months[12] = {
-	"Jan", "Feb", "Mar", "Apr", "May", "Jun",
-	"Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
-};
-
-static void printDate(struct tm date) {
-	printf(
-		"%s %s %d %d\n",
-		Days[date.tm_wday], Months[date.tm_mon],
-		date.tm_mday, 1900 + date.tm_year
-	);
-}
-
-static void printScalar(struct tm scalar) {
-	if (scalar.tm_year) printf("%dy ", scalar.tm_year);
-	if (scalar.tm_mon) printf("%dm ", scalar.tm_mon);
-	if (scalar.tm_mday % 7) {
-		printf("%dd\n", scalar.tm_mday);
-	} else {
-		printf("%dw\n", scalar.tm_mday / 7);
-	}
-}
-
-%}
-
-%token Number Month Day
-%left '+' '-'
-
-%%
-
-expr:
-	date { printDate($1); }
-	| scalar { printScalar($1); }
-	;
-
-date:
-	dateSpec
-	| date '+' scalar { $$ = dateAdd($1, $3); }
-	| date '-' scalar { $$ = dateSub($1, $3); }
-	;
-
-scalar:
-	scalarSpec
-	| scalar '+' scalar { $$ = scalarAdd($1, $3); }
-	| scalar '-' scalar { $$ = scalarSub($1, $3); }
-	| date '-' date { $$ = dateDiff($1, $3); }
-	;
-
-dateSpec:
-	'.' { $$ = today(); }
-	| Month Number { $$ = monthDay($1.tm_mon, $2.tm_sec); }
-	| Month Number Number { $$ = monthDayYear($1.tm_mon, $2.tm_sec, $3.tm_sec); }
-	| Day { $$ = weekDay($1.tm_wday); }
-	;
-
-scalarSpec:
-	Number 'd' { $$ = (struct tm) { .tm_mday = $1.tm_sec }; }
-	| Number 'w' { $$ = (struct tm) { .tm_mday = 7 * $1.tm_sec }; }
-	| Number 'm' { $$ = (struct tm) { .tm_mon = $1.tm_sec }; }
-	| Number 'y' { $$ = (struct tm) { .tm_year = $1.tm_sec }; }
-	;
-
-%%
-
-static void yyerror(const char *str) {
-	warnx("%s", str);
-}
-
-static const char *input;
-
-static int yylex(void) {
-	while (isspace(*input)) input++;
-	if (!*input) return EOF;
-
-	if (isdigit(*input)) {
-		char *rest;
-		yylval.tm_sec = strtol(input, &rest, 10);
-		input = rest;
-		return Number;
-	}
-
-	for (int i = 0; i < 7; ++i) {
-		if (strncasecmp(input, Days[i], 3)) continue;
-		while (isalpha(*input)) input++;
-		yylval.tm_wday = i;
-		return Day;
-	}
-
-	for (int i = 0; i < 12; ++i) {
-		if (strncasecmp(input, Months[i], 3)) continue;
-		while (isalpha(*input)) input++;
-		yylval.tm_mon = i;
-		return Month;
-	}
-
-	return *input++;
-}
-
-int main(void) {
-	char *buf = NULL;
-	size_t cap = 0;
-	while (0 < getline(&buf, &cap, stdin)) {
-		input = buf;
-		yyparse();
-		printf("\n");
-	}
-}