107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
|
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
-
+
+
|
TYPE_LESS_EQUAL,
TYPE_GREATER,
TYPE_GREATER_EQUAL,
TYPE_ADD,
TYPE_MODULO,
TYPE_AND,
TYPE_OR,
TYPE_NOT
TYPE_NOT,
TYPE_IS_REAL
} type;
id var, first, second;
size_t stackSize;
if ([atom isEqual: @"=="]) {
type = TYPE_EQUAL;
} else if ([atom isEqual: @"!="]) {
|
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
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155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
|
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
|
+
+
-
+
+
-
+
-
-
+
+
|
type = TYPE_MODULO;
} else if ([atom isEqual: @"&&"]) {
type = TYPE_AND;
} else if ([atom isEqual: @"||"]) {
type = TYPE_OR;
} else if ([atom isEqual: @"!"]) {
type = TYPE_NOT;
} else if ([atom isEqual: @"."]) {
type = TYPE_IS_REAL;
} else {
of_unichar_t firstCharacter =
[atom characterAtIndex: 0];
if (firstCharacter >= '0' && firstCharacter <= '9')
if ((firstCharacter >= '0' && firstCharacter <= '9') ||
firstCharacter == '-')
type = TYPE_LITERAL;
else
type = TYPE_VARIABLE;
}
switch (type) {
case TYPE_LITERAL:
[stack addObject:
[OFNumber numberWithIntMax: atom.decimalValue]];
[OFNumber numberWithDouble: atom.doubleValue]];
break;
case TYPE_VARIABLE:
if ((var = [variables objectForKey: atom]) == nil)
@throw [OFInvalidFormatException exception];
if ([var isKindOfClass: [OFString class]])
var = [OFNumber numberWithIntMax:
[var decimalValue]];
var = [OFNumber numberWithDouble:
[var doubleValue]];
[stack addObject: var];
break;
case TYPE_EQUAL:
case TYPE_NOT_EQUAL:
case TYPE_LESS:
case TYPE_LESS_EQUAL:
|
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
-
-
+
+
|
compare: second] == OF_ORDERED_DESCENDING];
break;
case TYPE_GREATER_EQUAL:
var = [OFNumber numberWithBool: [first
compare: second] != OF_ORDERED_ASCENDING];
break;
case TYPE_ADD:
var = [OFNumber numberWithIntMax:
[first intMaxValue] + [second intMaxValue]];
var = [OFNumber numberWithDouble:
[first doubleValue] + [second doubleValue]];
break;
case TYPE_MODULO:
var = [OFNumber numberWithIntMax:
[first intMaxValue] % [second intMaxValue]];
break;
case TYPE_AND:
var = [OFNumber numberWithBool:
|
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225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
228
229
230
231
232
233
234
235
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239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
+
+
+
+
+
-
-
+
+
+
+
+
+
+
+
+
+
+
-
+
|
[stack replaceObjectAtIndex: stackSize - 2
withObject: var];
[stack removeLastObject];
break;
case TYPE_NOT:
case TYPE_IS_REAL:
stackSize = stack.count;
first = stack.lastObject;
switch (type) {
case TYPE_NOT:
first = [OFNumber numberWithBool:
![stack.lastObject boolValue]];
var = [OFNumber numberWithBool:
![first boolValue]];
break;
case TYPE_IS_REAL:
var = [OFNumber numberWithBool:
[first doubleValue] != [first intMaxValue]];
break;
default:
OF_ENSURE(0);
}
[stack replaceObjectAtIndex: stackSize - 1
withObject: first];
withObject: var];
break;
}
}
if (stack.count != 1)
@throw [OFInvalidFormatException exception];
|