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/* -*- Mode: C++-C -*-
*
* Copyright 1994 Christopher B. Liebman
*
* Permission to use, copy, modify, distribute, and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and that
* both that copyright notice and this permission notice appear in
* supporting documentation, and that the name Christopher B. Liebman not
* be used in advertising or publicity pertaining to distribution of this
* software without specific, written prior permission.
*
* THIS SOFTWARE IS PROVIDED `AS-IS'. CHRISTOPHER B. LIEBMAN, DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING WITHOUT
* LIMITATION ALL IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE, OR NONINFRINGEMENT. IN NO EVENT SHALL CHRISTOPHER
* B. LIEBMAN, BE LIABLE FOR ANY DAMAGES WHATSOEVER, INCLUDING SPECIAL,
* INCIDENTAL OR CONSEQUENTIAL DAMAGES, INCLUDING LOSS OF USE, DATA, OR
* PROFITS, EVEN IF ADVISED OF THE POSSIBILITY THEREOF, AND REGARDLESS OF
* WHETHER IN AN ACTION IN CONTRACT, TORT OR NEGLIGENCE, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author : Chris Liebman
* Created On : Tue Jan 11 14:11:30 1994
* Last Modified By: Chris Liebman
* Last Modified On: Sun Feb 20 13:54:23 1994
* Update Count : 48
* Status : Released
*
* HISTORY
*
* PURPOSE
* Routines to handle reading of characters from the mail box file.
* We need to be able to push back single chars and sometimes strings.
*/
#ifndef lint
static char *RCSid = "$Id: mail_file.c,v 1.4 1994/02/23 13:17:02 liebman Exp $";
#endif
#include "faces.h"
#define BUFFER_SIZE 100
#define BUFFER_SIZE_INC 20
static char* buffer = NULL;
static int buffer_size = 0;
static int count;
static FILE* file;
int
MailFileOpen(name)
char *name;
{
file = fopen(name, "r");
if (file == NULL)
{
return 0;
}
return 1;
}
void
MailFileClose()
{
(void) fclose(file);
file = NULL;
count = 0;
}
int
MailFileReadChar()
{
int ch;
if (count)
{
ch = buffer[--count];
ch &= 0xff;
}
else
{
ch = fgetc(file);
}
return ch;
}
int
MailFileReadString(str, len)
char* str;
int len;
{
int got;
int ch;
for(got = 0; got < len; ++got)
{
ch = MailFileReadChar();
if (ch == EOF)
{
break;
}
str[got] = ch;
}
str[got] = '\0';
return got;
}
int
MailFileSkipString(len)
int len;
{
int skiped;
int ch;
for(skiped = 0; skiped < len; ++skiped)
{
ch = MailFileReadChar();
if (ch == EOF)
{
break;
}
}
return skiped;
}
void
MailFileUnReadChar(ch)
int ch;
{
if (buffer == NULL)
{
buffer = XtMalloc(BUFFER_SIZE);
buffer_size = BUFFER_SIZE;
}
if (count >= buffer_size)
{
buffer_size += BUFFER_SIZE_INC;
buffer = XtRealloc(buffer, buffer_size);
}
buffer[count++] = ch;
}
void
MailFileUnReadString(str)
char* str;
{
int len;
for (len = strlen(str); len > 0; --len)
{
MailFileUnReadChar(str[len - 1]);
}
}
void
MailFileClearUnRead()
{
count = 0;
}
int
MailFilePeekChar()
{
int ch;
ch = MailFileReadChar();
if (ch != EOF)
{
MailFileUnReadChar(ch);
}
return ch;
}
void
MailFilePeekString(str, len)
char* str;
int len;
{
MailFileReadString(str, len);
MailFileUnReadString(str);
}
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