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
|
/* $Id: out.c,v 1.4 2009/10/09 06:54:11 kristaps Exp $ */
/*
* Copyright (c) 2009 Kristaps Dzonsons <kristaps@kth.se>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include "out.h"
/*
* Convert a `scaling unit' to a consistent form, or fail. Scaling
* units are documented in groff.7, which stipulates the following:
*
* (1) A scaling unit is a signed/unsigned integer/float with or
* without a unit.
*
* (2) The following units exist:
* c Centimeter
* i Inch
* P Pica = 1/6 inch
* p Point = 1/72 inch
* m Em = the font size in points (width of letter m)
* M 100th of an Em
* n En = Em/2
* u Basic unit for actual output device
* v Vertical line space in basic units scaled point =
* 1/sizescale of a point (defined in font DESC file)
* f Scale by 65536.
*/
int
a2roffsu(const char *src, struct roffsu *dst)
{
char buf[BUFSIZ], hasd;
int i;
enum roffscale unit;
i = hasd = 0;
switch (*src) {
case ('+'):
src++;
break;
case ('-'):
buf[i++] = *src++;
break;
default:
break;
}
while (i < BUFSIZ) {
if ( ! isdigit((u_char)*src)) {
if ('.' != *src)
break;
else if (hasd)
break;
else
hasd = 1;
}
buf[i++] = *src++;
}
if (BUFSIZ == i || (*src && *(src + 1)))
return(0);
buf[i] = '\0';
switch (*src) {
case ('c'):
unit = SCALE_CM;
break;
case ('i'):
unit = SCALE_IN;
break;
case ('P'):
unit = SCALE_PC;
break;
case ('p'):
unit = SCALE_PT;
break;
case ('f'):
unit = SCALE_FS;
break;
case ('v'):
unit = SCALE_VS;
break;
case ('m'):
unit = SCALE_EM;
break;
case ('\0'):
/* FALLTHROUGH */
case ('u'):
unit = SCALE_BU;
break;
case ('M'):
unit = SCALE_MM;
break;
case ('n'):
unit = SCALE_EN;
break;
default:
return(0);
}
if ((dst->scale = atof(buf)) < 0)
dst->scale = 0;
dst->unit = unit;
dst->pt = hasd;
return(1);
}
|
