1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/* This is dvipdfmx, an eXtended version of dvipdfm by Mark A. Wicks.
Copyright (C) 2002-2020 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];
|
