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1.1 root 1: /*
2: * Copyright (c) 1980 Regents of the University of California.
3: * All rights reserved. The Berkeley software License Agreement
4: * specifies the terms and conditions for redistribution.
5: */
6:
7: #ifndef lint
8: static char sccsid[] = "@(#)printdecl.c 5.2 (Berkeley) 6/7/85";
9: #endif not lint
10:
11: /*
12: * Print out the type of a symbol.
13: */
14:
15: #include "defs.h"
16: #include "sym.h"
17: #include "symtab.h"
18: #include "tree.h"
19: #include "btypes.h"
20: #include "classes.h"
21: #include "sym.rep"
22:
23: printdecl(s)
24: SYM *s;
25: {
26: register SYM *t;
27: BOOLEAN semicolon;
28:
29: semicolon = TRUE;
30: switch(s->class) {
31: case CONST:
32: t = rtype(s->type);
33: if (t->class == SCAL) {
34: printf("(enumeration constant, ord %ld)", s->symvalue.iconval);
35: } else {
36: printf("const %s = ", s->symbol);
37: if (t == t_real) {
38: printf("%g", s->symvalue.fconval);
39: } else {
40: printordinal(s->symvalue.iconval, t);
41: }
42: }
43: break;
44:
45: case TYPE:
46: printf("type %s = ", s->symbol);
47: printtype(s, s->type);
48: break;
49:
50: case VAR:
51: if (isparam(s)) {
52: printf("(parameter) %s : ", s->symbol);
53: } else {
54: printf("var %s : ", s->symbol);
55: }
56: printtype(s, s->type);
57: break;
58:
59: case REF:
60: printf("(var parameter) %s : ", s->symbol);
61: printtype(s, s->type);
62: break;
63:
64: case RANGE:
65: case ARRAY:
66: case RECORD:
67: case VARNT:
68: case PTR:
69: printtype(s, s);
70: semicolon = FALSE;
71: break;
72:
73: case FVAR:
74: printf("(function variable) %s : ", s->symbol);
75: printtype(s, s->type);
76: break;
77:
78: case FIELD:
79: printf("(field) %s : ", s->symbol);
80: printtype(s, s->type);
81: break;
82:
83: case PROC:
84: printf("procedure %s", s->symbol);
85: listparams(s);
86: break;
87:
88: case PROG:
89: printf("program %s", s->symbol);
90: t = s->chain;
91: if (t != NIL) {
92: printf("(%s", t->symbol);
93: for (t = t->chain; t != NIL; t = t->chain) {
94: printf(", %s", t->symbol);
95: }
96: printf(")");
97: }
98: break;
99:
100: case FUNC:
101: printf("function %s", s->symbol);
102: listparams(s);
103: printf(" : ");
104: printtype(s, s->type);
105: break;
106:
107: default:
108: error("class %s in printdecl", classname(s));
109: }
110: if (semicolon) {
111: putchar(';');
112: }
113: putchar('\n');
114: }
115:
116: /*
117: * Recursive whiz-bang procedure to print the type portion
118: * of a declaration. Doesn't work quite right for variant records.
119: *
120: * The symbol associated with the type is passed to allow
121: * searching for type names without getting "type blah = blah".
122: */
123:
124: LOCAL printtype(s, t)
125: SYM *s;
126: SYM *t;
127: {
128: register SYM *tmp;
129: long r0, r1;
130:
131: tmp = findtype(t);
132: if (tmp != NIL && tmp != s) {
133: printf("%s", tmp->symbol);
134: return;
135: }
136: switch(t->class) {
137: case VAR:
138: case CONST:
139: case FUNC:
140: case PROC:
141: panic("printtype: class %s", classname(t));
142: break;
143:
144: case ARRAY:
145: printf("array[");
146: tmp = t->chain;
147: for (;;) {
148: printtype(tmp, tmp);
149: tmp = tmp->chain;
150: if (tmp == NIL) {
151: break;
152: }
153: printf(", ");
154: }
155: printf("] of ");
156: printtype(t, t->type);
157: break;
158:
159: case RECORD:
160: printf("record\n");
161: if (t->chain != NIL) {
162: printtype(t->chain, t->chain);
163: }
164: printf("end");
165: break;
166:
167: case FIELD:
168: if (t->chain != NIL) {
169: printtype(t->chain, t->chain);
170: }
171: printf("\t%s : ", t->symbol);
172: printtype(t, t->type);
173: printf(";\n");
174: break;
175:
176: case RANGE:
177: r0 = t->symvalue.rangev.lower;
178: r1 = t->symvalue.rangev.upper;
179: printordinal(r0, rtype(t->type));
180: printf("..");
181: printordinal(r1, rtype(t->type));
182: break;
183:
184: case PTR:
185: putchar('^');
186: printtype(t, t->type);
187: break;
188:
189: case TYPE:
190: if (t->symbol != NIL) {
191: printf("%s", t->symbol);
192: } else {
193: printtype(t, t->type);
194: }
195: break;
196:
197: case SCAL:
198: printf("(");
199: t = t->type->chain;
200: if (t != NIL) {
201: printf("%s", t->symbol);
202: t = t->chain;
203: while (t != NIL) {
204: printf(", %s", t->symbol);
205: t = t->chain;
206: }
207: } else {
208: panic("empty enumeration");
209: }
210: printf(")");
211: break;
212:
213: default:
214: printf("(class %d)", t->class);
215: break;
216: }
217: }
218:
219: /*
220: * List the parameters of a procedure or function.
221: * No attempt is made to combine like types.
222: */
223:
224: listparams(s)
225: SYM *s;
226: {
227: SYM *t;
228:
229: if (s->chain != NIL) {
230: putchar('(');
231: for (t = s->chain; t != NIL; t = t->chain) {
232: switch (t->class) {
233: case REF:
234: printf("var ");
235: break;
236:
237: case FPROC:
238: printf("procedure ");
239: break;
240:
241: case FFUNC:
242: printf("function ");
243: break;
244:
245: case VAR:
246: break;
247:
248: default:
249: panic("unexpected class %d for parameter", t->class);
250: }
251: printf("%s : ", t->symbol);
252: printtype(t, t->type);
253: if (t->chain != NIL) {
254: printf("; ");
255: }
256: }
257: putchar(')');
258: }
259: }
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