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
|
/* $Id$
*
* DiscreteRange: AST node for a discrete range.
*
* Copyright (C) 2007-2009 FAUmachine Team <info@faumachine.org>.
* This program is free software. You can redistribute it and/or modify it
* under the terms of the GNU General Public License, either version 2 of
* the License, or (at your option) any later version. See COPYING.
*/
#include "frontend/ast/DiscreteRange.hpp"
#include "frontend/ast/SubtypeIndication.hpp"
#include "frontend/ast/ConstInteger.hpp"
#include "frontend/ast/RangeConstraintType.hpp"
#include "frontend/reporting/ErrorRegistry.hpp"
#include <cassert>
namespace ast {
DiscreteRange::DiscreteRange(
SubtypeIndication *si,
Location loc
) : Expression(loc),
from(NULL),
to(NULL),
direction(DIRECTION_UP),
rangeName(NULL)
{
try {
this->setFromAndTo(si);
} catch(std::runtime_error &) {
std::string msg = "Not a constraint type found for range "
+ util::MiscUtil::toString(si);
CompileError *ce = new CompileError(*this, msg);
ErrorRegistry::addError(ce);
}
}
void
DiscreteRange::put(std::ostream &stream) const
{
stream << "RANGE ";
if (this->rangeName) {
stream << this->rangeName << ';';
return;
}
stream << this->from;
switch(this->direction) {
case DIRECTION_DOWN:
stream << " DOWNTO ";
break;
case DIRECTION_UP:
stream << " TO ";
break;
}
stream << this->to;
}
universal_integer
DiscreteRange::getArraySize(void) const
{
assert(this->from != NULL);
assert(this->to != NULL);
ConstInteger *left = dynamic_cast<ConstInteger*>(this->from);
ConstInteger *right = dynamic_cast<ConstInteger*>(this->to);
assert(left != NULL);
assert(right != NULL);
//FIXME might do a second try with ConstantPropagation
universal_integer sz = right->value - left->value + 1;
switch(this->direction) {
case DIRECTION_UP:
break;
case DIRECTION_DOWN:
sz = left->value - right->value + 1;
break;
}
if (sz < 0) {
return 0;
}
return sz;
}
universal_integer
DiscreteRange::getLowerBound(void) const
{
assert(this->from != NULL);
assert(this->to != NULL);
ConstInteger *left = dynamic_cast<ConstInteger*>(this->from);
ConstInteger *right = dynamic_cast<ConstInteger*>(this->to);
assert(left != NULL);
assert(right != NULL);
//FIXME might do a second try with ConstantPropagation
switch(this->direction) {
case DIRECTION_UP:
return left->value;
break;
case DIRECTION_DOWN:
return right->value;
break;
}
// not reached.
assert(false);
return 0;
}
universal_integer
DiscreteRange::getUpperBound(void) const
{
assert(this->from != NULL);
assert(this->to != NULL);
ConstInteger *left = dynamic_cast<ConstInteger*>(this->from);
ConstInteger *right = dynamic_cast<ConstInteger*>(this->to);
assert(left != NULL);
assert(right != NULL);
//FIXME might do a second try with ConstantPropagation
switch(this->direction) {
case DIRECTION_UP:
return right->value;
break;
case DIRECTION_DOWN:
return left->value;
break;
}
// not reached.
assert(false);
return 0;
}
universal_integer
DiscreteRange::getLeftBound(void) const
{
assert(this->from != NULL);
ConstInteger *left = dynamic_cast<ConstInteger*>(this->from);
assert(left != NULL);
return left->value;
}
universal_integer
DiscreteRange::getRightBound(void) const
{
assert(this->to != NULL);
ConstInteger *right = dynamic_cast<ConstInteger*>(this->to);
assert(right != NULL);
return right->value;
}
void
DiscreteRange::setFromAndTo(const SubtypeIndication *si)
/* throw(std::runtime_error) */
{
assert(si != NULL);
if (si->constraint != NULL) {
assert(si->constraint->from != NULL);
assert(si->constraint->to != NULL);
this->from = si->constraint->from;
this->to = si->constraint->to;
this->direction = si->constraint->direction;
return;
}
/* not found */
const SubtypeIndication *parent =
dynamic_cast<const SubtypeIndication*>(si->declaration);
if (parent != NULL) {
this->setFromAndTo(parent);
return;
}
/* might be a RangeConstraintType */
const RangeConstraintType *r =
dynamic_cast<const RangeConstraintType*>(si->declaration);
if (r == NULL) {
throw std::runtime_error("unconstraint");
}
assert(r->constraint != NULL);
assert(r->constraint->from != NULL);
assert(r->constraint->to != NULL);
this->from = r->constraint->from;
this->to = r->constraint->to;
this->direction = r->constraint->direction;
}
}; /* namespace ast */
|
