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/* $Header$
This is dvipdfm, a DVI to PDF translator.
Copyright (C) 1998, 1999 by Mark A. Wicks
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
The author may be contacted via the e-mail address
mwicks@kettering.edu
*/
#include <stdio.h>
#include <stdlib.h>
#include "system.h"
#include "mfileio.h"
#include "error.h"
#ifdef IODEBUG
static FILE *iodebug_file = NULL;
static long event = 0;
static void io_debug_init(void)
{
if (!iodebug_file) {
iodebug_file = fopen ("fopen.log", "wb");
fprintf (stderr, "\n*** File IO debugging started ***\n");
}
if (!iodebug_file) {
fprintf (stderr, "\nError opening io log\n");
}
}
#endif
#ifdef IODEBUG
FILE *mfopen(const char *name, const char *mode, const char *function, int line)
{
FILE *tmp;
io_debug_init();
tmp = fopen (name, mode);
event += 1;
fprintf(iodebug_file, "%p %07ld [fopen] %s:%d\n", tmp, event,
function, line);
return tmp;
}
int mfclose(FILE *file, const char *function, int line)
{
io_debug_init();
event += 1;
fprintf(iodebug_file, "%p %07ld [fclose] %s:%d\n", file, event,
function, line);
return fclose(file);
}
#endif
static void os_error()
{
ERROR ("io: An OS command failed that should not have.\n");
}
void seek_absolute (FILE *file, long pos)
{
if (fseek(file, pos, SEEK_SET)) {
os_error();
}
}
void seek_relative (FILE *file, long pos)
{
if (fseek(file, pos, SEEK_CUR)) {
os_error();
}
}
void seek_end (FILE *file)
{
if (fseek(file, 0L, SEEK_END)) {
os_error();
}
}
long tell_position (FILE *file)
{
long size;
if ((size = ftell (file)) < 0) {
os_error();
}
return size;
}
long file_size (FILE *file)
{
long size;
/* Seek to end */
seek_end (file);
size = tell_position (file);
rewind (file);
return (size);
}
/* Unlike fgets, mfgets works with \r, \n, or \r\n end of lines. */
char *mfgets (char *buffer, unsigned long length, FILE *file)
{
int ch = 0, i = 0;
while (i < length-1 && (ch = fgetc (file)) >= 0 && ch != '\n' && ch != '\r')
buffer[i++] = ch;
buffer[i] = 0;
if (ch < 0 && i == 0)
return NULL;
if (ch == '\r' && (ch = fgetc (file)) >= 0 && (ch != '\n'))
ungetc (ch, file);
return buffer;
}
char work_buffer[WORK_BUFFER_SIZE];
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