freebsd-dev/usr.bin/calendar/events.c
Conrad Meyer fd1efedc79 Add extremely useful calendar(1) application to FreeBSD
It does extremely useful things like execute sendmail and spew dubiously
accurate factoids.

From the feedback, it seems like it is an essential utility in a modern unix
and not at all a useless bikeshed.  How do those Linux people live without it?
Reverts r358561.
2020-03-03 00:20:08 +00:00

230 lines
5.4 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1992-2009 Edwin Groothuis <edwin@FreeBSD.org>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/time.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef WITH_ICONV
#include <iconv.h>
#include <errno.h>
#include <langinfo.h>
static iconv_t conv = (iconv_t)-1;
static char *currentEncoding = NULL;
#endif
#include "pathnames.h"
#include "calendar.h"
#ifdef WITH_ICONV
void
set_new_encoding(void)
{
const char *newenc;
newenc = nl_langinfo(CODESET);
if (currentEncoding == NULL) {
currentEncoding = strdup(newenc);
if (currentEncoding == NULL)
errx(1, "set_new_encoding: cannot allocate memory");
return;
}
if (strcmp(currentEncoding, newenc) == 0)
return;
free(currentEncoding);
currentEncoding = strdup(newenc);
if (currentEncoding == NULL)
errx(1, "set_new_encoding: cannot allocate memory");
if (conv != (iconv_t) -1) {
iconv_close(conv);
conv = (iconv_t) -1;
}
}
#endif
static char *
convert(char *input)
{
char *output;
#ifdef WITH_ICONV
size_t inleft, outleft, converted = 0;
char *outbuf, *tmp;
char *inbuf;
size_t outlen;
if (currentEncoding == NULL) {
output = strdup(input);
if (output == NULL)
errx(1, "convert: cannot allocate memory");
return (output);
}
if (conv == (iconv_t)-1) {
conv = iconv_open(outputEncoding, currentEncoding);
if (conv == (iconv_t)-1) {
if (errno == EINVAL)
errx(1, "Conversion is not supported");
else
err(1, "Initialization failure");
}
}
inleft = strlen(input);
inbuf = input;
outlen = inleft;
if ((output = malloc(outlen + 1)) == NULL)
errx(1, "convert: cannot allocate memory");
for (;;) {
errno = 0;
outbuf = output + converted;
outleft = outlen - converted;
converted = iconv(conv, (char **) &inbuf, &inleft, &outbuf, &outleft);
if (converted != (size_t) -1 || errno == EINVAL) {
/* finished or invalid multibyte, so truncate and ignore */
break;
}
if (errno != E2BIG) {
free(output);
err(1, "convert");
}
converted = outbuf - output;
outlen += inleft * 2;
if ((tmp = realloc(output, outlen + 1)) == NULL) {
free(output);
errx(1, "convert: cannot allocate memory");
}
output = tmp;
outbuf = output + converted;
}
/* flush the iconv conversion */
iconv(conv, NULL, NULL, &outbuf, &outleft);
/* null terminate the string */
*outbuf = '\0';
#else
output = strdup(input);
if (output == NULL)
errx(1, "convert: cannot allocate memory");
#endif
return (output);
}
struct event *
event_add(int year, int month, int day, char *date, int var, char *txt,
char *extra)
{
struct event *e;
/*
* Creating a new event:
* - Create a new event
* - Copy the machine readable day and month
* - Copy the human readable and language specific date
* - Copy the text of the event
*/
e = (struct event *)calloc(1, sizeof(struct event));
if (e == NULL)
errx(1, "event_add: cannot allocate memory");
e->month = month;
e->day = day;
e->var = var;
e->date = convert(date);
if (e->date == NULL)
errx(1, "event_add: cannot allocate memory");
e->text = convert(txt);
if (e->text == NULL)
errx(1, "event_add: cannot allocate memory");
e->extra = NULL;
if (extra != NULL && extra[0] != '\0')
e->extra = convert(extra);
addtodate(e, year, month, day);
return (e);
}
void
event_continue(struct event *e, char *txt)
{
char *oldtext, *text;
text = convert(txt);
oldtext = e->text;
if (oldtext == NULL)
errx(1, "event_continue: cannot allocate memory");
asprintf(&e->text, "%s\n%s", oldtext, text);
if (e->text == NULL)
errx(1, "event_continue: cannot allocate memory");
free(oldtext);
free(text);
return;
}
void
event_print_all(FILE *fp)
{
struct event *e;
while (walkthrough_dates(&e) != 0) {
#ifdef DEBUG
fprintf(stderr, "event_print_allmonth: %d, day: %d\n",
month, day);
#endif
/*
* Go through all events and print the text of the matching
* dates
*/
while (e != NULL) {
(void)fprintf(fp, "%s%c%s%s%s%s\n", e->date,
e->var ? '*' : ' ', e->text,
e->extra != NULL ? " (" : "",
e->extra != NULL ? e->extra : "",
e->extra != NULL ? ")" : ""
);
e = e->next;
}
}
}