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/* This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
Copyright (C) 2002-2016 by Jin-Hwan Cho and Shunsaku Hirata,
the dvipdfmx project team.
Copyright (C) 1998, 1999 by Mark A. Wicks <mwicks@kettering.edu>
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.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h>
#include "system.h"
#include "mfileio.h"
#include "error.h"
#ifdef IODEBUG
static FILE *iodebug_file = NULL;
static int 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();
#if defined(WIN32)
tmp = fsyscp_fopen (name, mode);
#else
tmp = fopen (name, mode);
#endif
event += 1;
fprintf(iodebug_file, "%p %07d [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 %07d [fclose] %s:%d\n", file, event,
function, line);
return fclose(file);
}
#endif
static void os_error(void)
{
ERROR ("io: An OS command failed that should not have.\n");
}
void seek_absolute (FILE *file, int32_t pos)
{
if (fseek(file, (long)pos, SEEK_SET)) {
os_error();
}
}
void seek_relative (FILE *file, int32_t pos)
{
if (fseek(file, (long)pos, SEEK_CUR)) {
os_error();
}
}
void seek_end (FILE *file)
{
if (fseek(file, 0L, SEEK_END)) {
os_error();
}
}
int32_t tell_position (FILE *file)
{
long size = ftell (file);
if (size < 0)
os_error();
#if LONG_MAX > 0x7fffffff
if (size > 0x7fffffff)
ERROR ("ftell: file size %ld exceeds 0x7fffffff.\n", size);
#endif
return size;
}
int32_t file_size (FILE *file)
{
int32_t size;
/* Seek to end */
seek_end (file);
size = tell_position (file);
rewind (file);
return size;
}
off_t xfile_size (FILE *file, const char *name)
{
off_t size;
xseek_end (file, name);
size = xtell_position (file, name);
rewind (file);
return size;
}
/* Unlike fgets, mfgets works with \r, \n, or \r\n end of lines. */
char *mfgets (char *buffer, int 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;
}
/* As each lines may contain null-characters, so outptr here is NOT
* null-terminated string.
* Returns -1 for when EOF is already reached, and -2 if buffer has no
* enough space.
*/
int
mfreadln (char *buf, int size, FILE *fp)
{
int c;
int len = 0;
while ((c = fgetc(fp)) != EOF && c != '\n' && c != '\r') {
if (len >= size) {
return -2;
}
buf[len++] = (char) c;
}
if (c == EOF && len == 0) {
return -1;
}
if (c == '\r' && (c = fgetc(fp)) >= 0 && (c != '\n'))
ungetc(c, fp);
return len;
}
char work_buffer[WORK_BUFFER_SIZE];
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