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
|
/* $Id: $ */
/* Copyright (C) 1997 Sverre Hvammen Johansen,
* Department of Informatics, University of Oslo.
*
* 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; version 2.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "text.h"
#ifdef STDC_HEADERS
#include <stdlib.h>
#else
double strtod ();
#endif
/******************************************************************************
REAL PROCEDURE GETREAL (text attributt) */
double
__rtgetreal (t)
__txtvp t;
{
char *s;
int sign;
static char cs[__RTPUTTEXTLENGTH + 1];
long csi = 0,
i,
j,
p;
double r;
#if FLOAT_IEEE | FLOAT_VAX
union
{
double d;
struct
{
#if WORDS_BIGENDIAN || FLOAT_VAX
long i2;
unsigned long i1;
#else
unsigned long i1;
long i2;
#endif
}
dasii;
}
value;
#endif
s = t->obj->string;
i = t->start - 1;
j = i + t->length;
skipblanke;
if (!more)
__rerror ("Getreal: Can't find any real item");
if (sign = fortegn)
i++;
if (sign == -1)
cs[csi++] = '-';
skipblanke;
if (!more)
__rerror ("Getreal: Can't find any integer item");
if (!digit)
if (s[i] == __currentlowten)
{
cs[csi++] = '1';
}
else if (s[i] != __currentdecimalmark)
__rerror ("Getreal: Illegal real item");
for (; more && digit; i++)
{
if (csi >= __RTPUTTEXTLENGTH)
goto texttolong;
cs[csi++] = s[i];
}
if (s[i] == __currentdecimalmark)
{
i++;
cs[csi++] = '.';
if (!digit)
__rerror ("Getreal: Can't find any real item");
for (; more && digit; i++)
{
if (csi >= __RTPUTTEXTLENGTH)
goto texttolong;
cs[csi++] = s[i];
}
}
if (s[i] == __currentlowten)
{
i++;
cs[csi++] = 'e';
skipblanke;
if (!more)
__rerror ("Getreal: Can't find any real item");
if (sign = fortegn)
i++;
if (csi >= __RTPUTTEXTLENGTH)
goto texttolong;
if (sign == -1)
cs[csi++] = '-';
skipblanke;
if (!more)
__rerror ("Getreal: Can't find any real item");
for (; more && digit; i++)
{
if (csi >= __RTPUTTEXTLENGTH)
goto texttolong;
cs[csi++] = s[i];
}
}
if (csi > __RTPUTTEXTLENGTH)
goto texttolong;
cs[csi++] = '\0';
r= strtod (cs, __NULL);
#if FLOAT_VAX
#define reswd (1<<31)
if (value.dasii.i2 == reswd && value.dasii.i1 == 0)
goto texttolong;
#endif
#if FLOAT_IEEE
#define emask (2047L<<20)
value.d = r;
if ((value.dasii.i2 & emask) == emask)
goto texttolong;
#endif
t->pos = i - t->start + 2;
return (r);
texttolong:
__rerror ("Getreal: To big real item");
/* NOTREACHED */
}
|
