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
|
/* Copyright (c) 1988 Bellcore
** All Rights Reserved
** Permission is granted to copy or use this program, EXCEPT that it
** may not be sold for profit, the copyright notice must be reproduced
** on copies, and credit should be given to Bellcore where it is due.
** BELLCORE MAKES NO WARRANTY AND ACCEPTS NO LIABILITY FOR THIS PROGRAM.
*/
#ifndef lint
static char rcsid[]= "$Header$";
#endif
#include "misc.h"
#include "flagdefs.h"
#include "tol.h"
#include "token.h"
#include "line.h"
#include "float.h"
#include "compare.h"
#include <ctype.h>
static int _X_strcmp();
static int _X_cmptokens();
static int _X_floatdiff();
int
X_com(a,b,flags)
int a,b,flags;
{
K_token atmp,btmp;
atmp = K_gettoken(0,a);
btmp = K_gettoken(1,b);
if(flags & U_BYTE_COMPARE)
{
return(_X_strcmp(K_gettext(atmp),K_gettext(btmp),flags));
}
else
{
return(_X_cmptokens(atmp,btmp,flags));
}
#ifndef lint
Z_fatal("this line should never be reached in com");
return(-1); /* Z_fatal never returns, but i need a this line
here to stop lint from complaining */
#endif
}
/*
** same as strcmp() except that case can be optionally ignored
*/
static int
_X_strcmp(s1,s2,flags)
char *s1,*s2;
int flags;
{
if (flags & U_NO_CASE)
{
for (;('\0' != s1) && ('\0' != *s2);s1++,s2++)
{
if(isalpha(*s1) && isalpha(*s2))
{
if(tolower(*s1) != tolower(*s2))
{
return(1);
}
}
else
{
if(*s1!=*s2)
{
return(1);
}
}
}
return(*s1 != *s2);
}
else
{
return(strcmp(s1,s2));
}
}
/*
** routine to compare two tokens
*/
static int
_X_cmptokens(p1,p2,flags)
K_token p1, p2;
int flags;
{
if (K_gettype(p1) != K_gettype(p2))
{
return(1);
}
switch (K_gettype(p1))
{
case K_LIT:
return(_X_strcmp(K_gettext(p1),K_gettext(p2),flags));
case K_FLO_NUM:
return(_X_floatdiff(K_getfloat(p1),
K_getfloat(p2),
T_picktol(K_gettol(p1),
K_gettol(p2))));
default:
Z_fatal("fell off switch in _X_cmptokens");
return(-1); /* Z_fatal never returns, but i need a this line
here to stop lint from complaining */
}
}
/*
** compare two F_floats using a tolerance
*/
static int
_X_floatdiff(p1,p2,the_tol)
F_float p1,p2;
T_tol the_tol;
{
F_float diff, float_tmp;
T_tol tol_tmp;
/*
** check for null tolerance list
*/
if (T_isnull(the_tol))
{
Z_fatal("_X_floatdiff called with a null tolerance");
}
/*
** look for an easy answer. i.e -- check
** to see if any of the tolerances are of type T_IGNORE
** or if the numbers are too small to exceed an absolute
** tolerance.
** if so, return immediately
*/
for(tol_tmp=the_tol; !(T_isnull(tol_tmp)) ;tol_tmp=T_getnext(tol_tmp))
{
if ((T_IGNORE == T_gettype(tol_tmp)) ||
/*
** take a look at the exponents before you bother
** with the mantissas
*/
((T_ABSOLUTE == T_gettype(tol_tmp))
&& !F_zerofloat(T_getfloat(tol_tmp))
&& (F_getexp(p1) <
F_getexp(T_getfloat(tol_tmp))-1)
&& (F_getexp(p2) <
F_getexp(T_getfloat(tol_tmp))-1)))
{
return(0);
}
}
/*
** ok, we're going to have to do some arithmetic, so
** first find the magnitude of the difference
*/
if (F_getsign(p1) != F_getsign(p2))
{
diff = F_floatmagadd(p1,p2);
}
else
{
diff = F_floatsub(p1,p2);
}
/*
** now check to see if the difference exceeds any tolerance
*/
for(tol_tmp=the_tol; !(T_isnull(tol_tmp)) ;tol_tmp=T_getnext(tol_tmp))
{
float_tmp = T_getfloat(tol_tmp);
if (T_gettype(tol_tmp) == T_ABSOLUTE)
{
/* do nothing */
}
else if (T_gettype(tol_tmp) == T_RELATIVE)
{
if (F_floatcmp(p1,p2) > 0)
{
float_tmp = F_floatmul(p1, float_tmp);
}
else
{
float_tmp = F_floatmul(p2, float_tmp);
}
}
else
{
Z_fatal("bad value for type of tolerance in floatdiff");
}
/*
** if we pass this tolerance, then we're done
*/
if (F_floatcmp(diff,float_tmp) <= 0)
{
return(0);
}
}
/*
** all of the tolerances were exceeded
*/
return(1);
}
|
