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calendar.c
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C/C++ Source or Header
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1992-03-29
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4KB
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164 lines
static char rcsid[] = "@(#)$Id: calendar.c,v 4.1.1.1 90/06/21 22:16:50 syd Exp $";
/*******************************************************************************
* The Elm Mail System - $Revision: 4.1.1.1 $ $State: Exp $
*
* Copyright (c) 1986, 1987 Dave Taylor
* Copyright (c) 1988, 1989, 1990 USENET Community Trust
*******************************************************************************
* Bug reports, patches, comments, suggestions should be sent to:
*
* Syd Weinstein, Elm Coordinator
* elm@DSI.COM dsinc!elm
*
*******************************************************************************
* $Log: calendar.c,v $
* Revision 4.1.1.1 90/06/21 22:16:50 syd
* Add skip leading whitespace
* From Jerry Pendergrafyt
*
* Revision 4.1 90/04/28 22:42:36 syd
* checkin of Elm 2.3 as of Release PL0
*
*
******************************************************************************/
/** This routine implements a rather snazzy idea suggested by Warren
Carithers of the Rochester Institute of Technology that allows
mail to contain entries formatted in a manner that will allow direct
copying into a users calendar program.
All lines in the current message beginning with "->", e.g.
-> Mon 04/21 1:00p meet with chairman candidate
get copied into the user's calendar file.
**/
#include "headers.h"
#ifdef ENABLE_CALENDAR /* if not defined, this will be an empty file */
#include <errno.h>
#ifndef OS2
extern int errno;
#endif
char *error_name(), *error_description(), *strcpy();
scan_calendar()
{
FILE *calendar;
int count;
/* First step is to open the calendar file for appending... **/
if (can_open(calendar_file, "a") != 0) {
dprint(2, (debugfile,
"Error: wrong permissions to append to calendar %s\n",
calendar_file));
dprint(2, (debugfile, "** %s - %s **\n",
error_name(errno), error_description(errno)));
error1("Not able to append to file %s!", calendar_file);
return;
}
save_file_stats(calendar_file);
if ((calendar = fopen(calendar_file,"a")) == NULL) {
dprint(2, (debugfile,
"Error: couldn't append to calendar file %s (scan)\n",
calendar_file));
dprint(2, (debugfile, "** %s - %s **\n",
error_name(errno), error_description(errno)));
error1("Couldn't append to file %s!", calendar_file);
return;
}
count = extract_info(calendar);
fclose(calendar);
restore_file_stats(calendar_file);
if (count > 0)
error2("%d entr%s saved in calendar file.",
count, count > 1 ? "ies" : "y");
else
error("No calendar entries found in that message.");
return;
}
int
extract_info(save_to_fd)
FILE *save_to_fd;
{
/** Save the relevant parts of the current message to the given
calendar file. The only parameter is an opened file
descriptor, positioned at the end of the existing file **/
register int entries = 0, lines;
char buffer[SLEN], *cp, *is_cal_entry();
/** get to the first line of the message desired **/
if (fseek(mailfile, headers[current-1]->offset, 0) == -1) {
dprint(1,(debugfile,
"ERROR: Attempt to seek %d bytes into file failed (%s)",
headers[current-1]->offset, "extract_info"));
error1("ELM [seek] failed trying to read %d bytes into file.",
headers[current-1]->offset);
return(0);
}
/* how many lines in message? */
lines = headers[current-1]->lines;
/* now while not EOF & still in message... scan it! */
while (lines) {
if(fgets(buffer, SLEN, mailfile) == NULL)
break;
if(buffer[strlen(buffer)-1] == '\n')
lines--; /* got a full line */
if((cp = is_cal_entry(buffer)) != NULL) {
entries++;
fprintf(save_to_fd,"%s", cp);
}
}
dprint(4,(debugfile,
"Got %d calender entr%s.\n", entries, entries > 1? "ies":"y"));
return(entries);
}
char *
is_cal_entry(string)
register char *string;
{
/* If string is of the form
* {optional white space} ->{optional white space} {stuff}
* return a pointer to stuff, otherwise return NULL.
*/
while( whitespace(*string) )
string++; /* strip leading W/S */
if(strncmp(string, "->", 2) == 0) {
for(string +=2 ; whitespace(*string); string++)
;
return(string);
}
return(NULL);
}
#endif