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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/* tterm.c -- Minimalist information on the terminal
Copyright (C) 1998 Free Software Foundation, Inc.
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 3, 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>
#if defined STDC_HEADERS || defined _LIBC || defined HAVE_STDLIB_H
# include <stdlib.h>
#else
char *getenv ();
#endif
#if HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
#if HAVE_INTTYPES_H
# include <inttypes.h>
#endif
#if HAVE_LIMITS_H
/* limits.h must come before pathmax.h because limits.h on some systems
undefs PATH_MAX, whereas pathmax.h sets PATH_MAX. */
# include <limits.h>
#endif
#ifndef CHAR_BIT
# define CHAR_BIT 8
#endif
/* The extra casts work around common compiler bugs,
e.g. Cray C 5.0.3.0 when t == time_t. */
#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
#define TYPE_MINIMUM(t) \
((t) (TYPE_SIGNED (t) ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) : (t) 0))
#define TYPE_MAXIMUM(t) ((t) (~ (t) 0 - TYPE_MINIMUM (t)))
#ifndef INT_MAX
# define INT_MAX TYPE_MAXIMUM (int)
#endif
#if HAVE_TERMIOS_H
# include <termios.h>
#endif
#ifdef HAVE_SYS_IOCTL
# include <sys/ioctl.h>
#endif
#if ENABLE_NLS
# include <libintl.h>
# define _(Text) gettext (Text)
#else
# define _(Text) Text
#endif
#include "xstrtol.h"
#include "quotearg.h"
#include "error.h"
#include "tterm.h"
struct tterm
{
/* The number of chars per hardware tab stop. Setting this to zero
inhibits the use of TAB characters for separating columns. -T */
size_t tabsize;
/* The line length to use for breaking lines in many-per-line format.
Can be set with -w. */
size_t width;
};
/* Default setting */
static struct tterm tterm_default =
{
8, /* tabsize */
80 /* width */
};
/* Set the line width of TTERM to WIDTH. Returns the previous value. */
size_t
tterm_width_set (struct tterm * tterm, size_t width)
{
struct tterm *t = tterm ? tterm : &tterm_default;
size_t old = t->width;
t->width = width;
return old;
}
/* Return the line width of TTERM. */
size_t
tterm_width (struct tterm * tterm)
{
struct tterm *t = tterm ? tterm : &tterm_default;
return t->width;
}
/* Set the tab size of TTERM to SIZE. Returns the previous value. */
size_t
tterm_tabsize_set (struct tterm * tterm, size_t size)
{
struct tterm *t = tterm ? tterm : &tterm_default;
size_t old = t->tabsize;
t->tabsize = size;
return old;
}
/* Return the tab size of TTERM. */
size_t
tterm_tabsize (struct tterm * tterm)
{
struct tterm *t = tterm ? tterm : &tterm_default;
return t->tabsize;
}
/* Initialize the values taking the environment into account (for line
width, and tabsize). */
void
tterm_initialize (struct tterm *tterm, FILE *stream)
{
const char *cp;
struct tterm *t = tterm ? tterm : &tterm_default;
long int tmp_long;
/* Length of the line. */
if ((cp = getenv ("COLUMNS")) && *cp)
{
if (xstrtol (cp, NULL, 0, &tmp_long, NULL) == LONGINT_OK
&& 0 < tmp_long && tmp_long <= INT_MAX)
{
t->width = (int) tmp_long;
}
else
{
error (0, 0,
"ignoring invalid width in environment variable COLUMNS: %s",
quotearg (cp));
}
}
#ifdef TIOCGWINSZ
{
struct winsize ws;
if (ioctl (fileno (stream), TIOCGWINSZ, &ws) != -1 && ws.ws_col != 0)
t->width = ws.ws_col;
}
#endif
/* Tabulation size. */
/* Using the TABSIZE environment variable is not POSIX-approved.
Ignore it when POSIXLY_CORRECT is set. */
if (!getenv ("POSIXLY_CORRECT") && (cp = getenv ("TABSIZE")) && *cp)
{
if (xstrtol (cp, NULL, 0, &tmp_long, NULL) == LONGINT_OK
&& 0 <= tmp_long && tmp_long <= INT_MAX)
{
t->tabsize = (int) tmp_long;
}
else
{
error (0, 0,
"ignoring invalid tab size in environment variable TABSIZE: %s",
quotearg (cp));
}
}
}
/* Sample test of TinyTerm. */
#ifdef TEST
#include <stdio,h>
const char * program_name = "tterm";
int
main (int argc, char **argv)
{
tterm_init ();
printf ("Width = %d, Tabsize = %d\n",
tterm_width (NULL), tterm_tabsize (NULL));
return 0;
}
#endif
|