4223
|
1 #include "IO.h"
|
|
2 #include "Str.h"
|
|
3 #include "expr.h"
|
|
4 #include "main_label.h"
|
|
5 #include "mars.h"
|
|
6 #include "op.h"
|
|
7
|
|
8 #include <ctype.h>
|
|
9 #include <stddef.h>
|
|
10 #include <string.h>
|
|
11
|
|
12 void op_init(struct op *op) {
|
|
13 St_init(&op->txt);
|
|
14 op->type = OP_NOP;
|
|
15 op->arg = NULL;
|
|
16 op->arh.expr = NULL;
|
|
17 op->next = NULL;
|
|
18 op->line = 0;
|
|
19 }
|
|
20
|
|
21 void op_end(struct op *op) {
|
|
22 St_clear(&op->txt);
|
|
23 free_expr(op->arg);
|
|
24 switch (op->type) {
|
|
25 case OP_ASSIGN:
|
|
26 case OP_CALL_BACK:
|
|
27 case OP_MODIFY:
|
|
28 case OP_PRINT:
|
|
29 case OP_PUTC:
|
|
30 case OP_SET_VAL:
|
|
31 case OP_TEMP:
|
|
32 free_expr(op->arh.expr);
|
|
33 break;
|
|
34
|
|
35 default:
|
|
36 break;
|
|
37 }
|
|
38 }
|
|
39
|
|
40 void op_getop(struct op *p) {
|
|
41 p->next = NULL;
|
|
42
|
|
43 switch (ST_FIRSTCHAR(&p->txt)) {
|
|
44 case '#':
|
|
45 if (ST_INDEX(&p->txt, 1) == '!') {
|
|
46 p->type = OP_NOP;
|
|
47 break;
|
|
48 }
|
|
49 p->type = OP_SYSTEM;
|
|
50 St_shift(&p->txt);
|
|
51 p->arg = get_expr(p);
|
|
52 break;
|
|
53
|
|
54 case 'A':
|
|
55 switch (ST_INDEX(&p->txt, 1)) {
|
|
56 case 'B':
|
|
57 if (St_len(&p->txt) < 5 || St_ncmp_m(&p->txt, "ABRUF", 5)) {
|
|
58 goto defualt;
|
|
59 }
|
|
60 p->type = OP_CALL_BACK;
|
|
61 St_del(&p->txt, 0, 5);
|
|
62 p->arh.expr = get_iobj(p);
|
|
63 p->arg = get_expr(p);
|
|
64 break;
|
|
65
|
|
66 case 'N':
|
|
67 if (St_len(&p->txt) < 5 || St_ncmp_m(&p->txt, "ANRUF", 5)) {
|
|
68 goto defualt;
|
|
69 }
|
|
70 p->type = OP_CALL_DYN;
|
|
71 St_del(&p->txt, 0, 5);
|
|
72 p->arg = get_expr(p);
|
|
73 break;
|
|
74
|
|
75 default:
|
|
76 goto defualt;
|
|
77 }
|
|
78 break;
|
|
79
|
|
80 case 'C':
|
|
81 if (St_len(&p->txt) < 6 || St_ncmp_m(&p->txt, "CLAUDS", 6)) {
|
|
82 goto defualt;
|
|
83 }
|
|
84 p->type = OP_CLOSE;
|
|
85 St_del(&p->txt, 0, 6);
|
|
86 p->arg = get_expr(p);
|
|
87 break;
|
|
88
|
|
89 case 'E':
|
|
90 switch (ST_INDEX(&p->txt, 1)) {
|
|
91 case 'L':
|
|
92 if (St_len(&p->txt) < 4 || St_ncmp_m(&p->txt, "ELSE", 4)) {
|
|
93 goto defualt;
|
|
94 }
|
|
95 p->type = OP_ELSE;
|
|
96 St_del(&p->txt, 0, 4);
|
|
97 break;
|
|
98
|
|
99 case 'N':
|
|
100 if (St_len(&p->txt) >= 6 && St_ncmp_m(&p->txt, "END IF", 6) == 0) {
|
|
101 p->type = OP_FI;
|
|
102 break;
|
|
103 }
|
|
104 if (St_len(&p->txt) < 3 || St_ncmp_m(&p->txt, "END", 3)) {
|
|
105 goto defualt;
|
|
106 }
|
|
107 p->type = OP_EXIT;
|
|
108 St_del(&p->txt, 0, 3);
|
|
109 p->arg = get_expr(p);
|
|
110 break;
|
|
111
|
|
112 default:
|
|
113 goto defualt;
|
|
114 }
|
|
115 break;
|
|
116
|
|
117 case 'F':
|
|
118 switch (ST_INDEX(&p->txt, 1)) {
|
|
119 case 'I':
|
|
120 p->type = OP_FI;
|
|
121 break;
|
|
122
|
|
123 case 'L':
|
|
124 if (St_len(&p->txt) < 5 || St_ncmp_m(&p->txt, "FLUSH", 5)) {
|
|
125 goto defualt;
|
|
126 }
|
|
127 p->type = OP_FLUSH;
|
|
128 St_del(&p->txt, 0, 5);
|
|
129 p->arg = get_expr(p);
|
|
130 break;
|
|
131
|
|
132 default:
|
|
133 goto defualt;
|
|
134 }
|
|
135 break;
|
|
136
|
|
137 case 'G':
|
|
138 if (ST_INDEX(&p->txt, 1) != 'O') {
|
|
139 goto defualt;
|
|
140 }
|
|
141 switch (ST_INDEX(&p->txt, 2)) {
|
|
142 case 'F':
|
|
143 if (St_len(&p->txt) < 5 || St_ncmp_m(&p->txt, "GOFOR", 5)) {
|
|
144 goto defualt;
|
|
145 }
|
|
146 p->type = OP_GOBACK;
|
|
147 St_del(&p->txt, 0, 5);
|
|
148 p->arg = get_expr(p);
|
|
149 break;
|
|
150
|
|
151 case 'T':
|
|
152 if (St_len(&p->txt) < 4 || St_ncmp_m(&p->txt, "GOTO", 4)) {
|
|
153 goto defualt;
|
|
154 }
|
|
155 p->type = OP_GOTO;
|
|
156 St_del(&p->txt, 0, 4);
|
|
157 p->arg = get_expr(p);
|
|
158 break;
|
|
159
|
|
160 default:
|
|
161 goto defualt;
|
|
162 }
|
|
163 break;
|
|
164
|
|
165 case 'I':
|
|
166 switch (ST_INDEX(&p->txt, 1)) {
|
|
167 case 'A':
|
|
168 if (St_len(&p->txt) < 4 || St_ncmp_m(&p->txt, "IACS", 4)) {
|
|
169 goto defualt;
|
|
170 }
|
|
171 p->type = OP_THROW;
|
|
172 St_del(&p->txt, 0, 4);
|
|
173 p->arg = get_expr(p);
|
|
174 break;
|
|
175
|
|
176 case 'F':
|
|
177 p->type = OP_IF;
|
|
178 St_del(&p->txt, 0, 2);
|
|
179 p->arg = get_expr(p);
|
|
180 break;
|
|
181
|
|
182 default:
|
|
183 goto defualt;
|
|
184 }
|
|
185 break;
|
|
186
|
|
187 case 'K':
|
|
188 if (St_len(&p->txt) < 4 || St_ncmp_m(&p->txt, "KTHX", 4)) {
|
|
189 goto defualt;
|
|
190 }
|
|
191 p->type = OP_RETURN;
|
|
192 St_del(&p->txt, 0, 4);
|
|
193 p->arg = get_expr(p);
|
|
194 break;
|
|
195
|
|
196 case 'L':
|
|
197 if (ST_INDEX(&p->txt, 1) != 'E') {
|
|
198 goto defualt;
|
|
199 }
|
|
200 switch (ST_INDEX(&p->txt, 2)) {
|
|
201 case 'E':
|
|
202 if (ST_INDEX(&p->txt, 3) != 'T') {
|
|
203 goto defualt;
|
|
204 }
|
|
205 p->type = OP_TEMP;
|
|
206 St_del(&p->txt, 0, 4);
|
|
207 p->arh.expr = get_lval(p);
|
|
208 p->arg = get_expr(p);
|
|
209 break;
|
|
210
|
|
211 case 'T':
|
|
212 p->type = OP_ASSIGN;
|
|
213 St_del(&p->txt, 0, 3);
|
|
214 p->arh.expr = get_lval(p);
|
|
215 St_shiftws(&p->txt);
|
|
216 if (p->arh.expr && ST_INDEX(&p->txt, 1) == '=' && OPERATOR_P(ST_FIRSTCHAR(&p->txt))) {
|
|
217 p->arh.expr->op = expr_binop(ST_FIRSTCHAR(&p->txt));
|
|
218 St_del(&p->txt, 0, 2);
|
|
219 p->type = OP_MODIFY;
|
|
220 }
|
|
221 p->arg = get_expr(p);
|
|
222 break;
|
|
223
|
|
224 default:
|
|
225 goto defualt;
|
|
226 }
|
|
227 break;
|
|
228
|
|
229 case 'N':
|
|
230 if (St_len(&p->txt) < 4 || St_ncmp_m(&p->txt, "NEXT", 4)) {
|
|
231 goto defualt;
|
|
232 } else {
|
|
233 size_t tmp;
|
|
234 p->type = OP_NOP;
|
|
235 St_del(&p->txt, 0, 4);
|
|
236 tmp = St_shiftws(&p->txt);
|
|
237 if (!(p->next = ma_find(&Mars, &p->txt))) {
|
|
238 St_tac_m(&p->txt, "NEXT ", 4 + !!tmp);
|
|
239 p->arg = get_expr(p);
|
|
240 p->arh.expr = NULL;
|
|
241 p->type = OP_PRINT;
|
|
242 }
|
|
243 }
|
|
244 break;
|
|
245
|
|
246 case 'R':
|
|
247 if (ST_INDEX(&p->txt, 1) != 'E') {
|
|
248 goto defualt;
|
|
249 }
|
|
250 switch (ST_INDEX(&p->txt, 2)) {
|
|
251 case 'M':
|
|
252 p->type = OP_NOP;
|
|
253 break;
|
|
254
|
|
255 case 'S':
|
|
256 if (St_len(&p->txt) < 5 || St_ncmp_m(&p->txt, "RESET", 5)) {
|
|
257 goto defualt;
|
|
258 }
|
|
259 p->type = OP_RESET;
|
|
260 St_del(&p->txt, 0, 5);
|
|
261 p->arg = get_expr(p);
|
|
262 break;
|
|
263
|
|
264 default:
|
|
265 goto defualt;
|
|
266 }
|
|
267 break;
|
|
268
|
|
269 case 'S':
|
|
270 if (St_len(&p->txt) < 3 || St_ncmp_m(&p->txt, "SET", 3)) {
|
|
271 goto defualt;
|
|
272 }
|
|
273 p->type = OP_PUTC;
|
|
274 St_del(&p->txt, 0, 3);
|
|
275 p->arg = get_iobj(p);
|
|
276 p->arh.expr = NULL;
|
|
277 St_shiftws(&p->txt);
|
|
278 if (ST_FIRSTCHAR(&p->txt) == ',') {
|
|
279 St_shift(&p->txt);
|
|
280 p->arh.expr = p->arg;
|
|
281 p->arg = get_expr(p);
|
|
282 }
|
|
283 break;
|
|
284
|
|
285 case 'W':
|
|
286 if (St_len(&p->txt) < 4 || St_ncmp_m(&p->txt, "WUNT", 4)) {
|
|
287 goto defualt;
|
|
288 }
|
|
289 p->type = OP_PRINT;
|
|
290 St_del(&p->txt, 0, 4);
|
|
291 p->arg = get_iobj(p);
|
|
292 p->arh.expr = NULL;
|
|
293 St_shiftws(&p->txt);
|
|
294 if (ST_FIRSTCHAR(&p->txt) != EOF) {
|
|
295 p->arh.expr = p->arg;
|
|
296 p->arg = get_expr(p);
|
|
297 }
|
|
298 break;
|
|
299
|
|
300 defualt:
|
|
301 default:
|
|
302 if ((p->arh.op = ma_find(&Mars, &p->txt))) {
|
|
303 p->type = OP_CALL;
|
|
304 p->arg = get_expr(p);
|
|
305 } else {
|
|
306 p->type = OP_PRINT;
|
|
307 p->arg = get_expr(p);
|
|
308 p->arh.expr = NULL;
|
|
309 }
|
|
310 break;
|
|
311 }
|
|
312
|
|
313 St_clear(&p->txt);
|
|
314 }
|