|
|
1.1 root 1: /* Copyright (c) 1980 Regents of the University of California */
2:
3: static char sccsid[] = "@(#)flvalue.c 1.13 2/28/83";
4:
5: #include "whoami.h"
6: #include "0.h"
7: #include "tree.h"
8: #include "opcode.h"
9: #include "objfmt.h"
10: #ifdef PC
11: # include "pc.h"
12: # include "pcops.h"
13: #endif PC
14: #include "tmps.h"
15:
16: /*
17: * flvalue generates the code to either pass on a formal routine,
18: * or construct the structure which is the environment for passing.
19: * it tells the difference by looking at the tree it's given.
20: */
21: struct nl *
22: flvalue( r , formalp )
23: int *r;
24: struct nl *formalp;
25: {
26: struct nl *p;
27: struct nl *tempnlp;
28: char *typename;
29: #ifdef PC
30: char extname[ BUFSIZ ];
31: #endif PC
32:
33: if ( r == NIL ) {
34: return NIL;
35: }
36: typename = formalp -> class == FFUNC ? "function":"procedure";
37: if ( r[0] != T_VAR ) {
38: error("Expression given, %s required for %s parameter %s" ,
39: typename , typename , formalp -> symbol );
40: return NIL;
41: }
42: p = lookup(r[2]);
43: if (p == NIL) {
44: return NIL;
45: }
46: switch ( p -> class ) {
47: case FFUNC:
48: case FPROC:
49: if ( r[3] != NIL ) {
50: error("Formal %s %s cannot be qualified" ,
51: typename , p -> symbol );
52: return NIL;
53: }
54: # ifdef OBJ
55: put(2, PTR_RV | bn << 8+INDX, (int)p->value[NL_OFFS]);
56: # endif OBJ
57: # ifdef PC
58: putRV( p -> symbol , bn , p -> value[ NL_OFFS ] ,
59: p -> extra_flags ,
60: p2type( p ) );
61: # endif PC
62: return p;
63: case FUNC:
64: case PROC:
65: if ( r[3] != NIL ) {
66: error("%s %s cannot be qualified" , typename ,
67: p -> symbol );
68: return NIL;
69: }
70: if (bn == 0) {
71: error("Built-in %s %s cannot be passed as a parameter" ,
72: typename , p -> symbol );
73: return NIL;
74: }
75: /*
76: * allocate space for the thunk
77: */
78: tempnlp = tmpalloc(sizeof(struct formalrtn), NIL, NOREG);
79: # ifdef OBJ
80: put(2 , O_LV | cbn << 8 + INDX ,
81: (int)tempnlp -> value[ NL_OFFS ] );
82: put(2, O_FSAV | bn << 8, (long)p->value[NL_ENTLOC]);
83: # endif OBJ
84: # ifdef PC
85: putleaf( P2ICON , 0 , 0 ,
86: ADDTYPE( P2PTR , ADDTYPE( P2FTN , P2PTR|P2STRTY ) ) ,
87: "_FSAV" );
88: sprintf( extname , "%s" , FORMALPREFIX );
89: sextname( &extname[ strlen( extname ) ] ,
90: p -> symbol , bn );
91: putleaf( P2ICON , 0 , 0 , p2type( p ) , extname );
92: putleaf( P2ICON , bn , 0 , P2INT , 0 );
93: putop( P2LISTOP , P2INT );
94: putLV( 0 , cbn , tempnlp -> value[NL_OFFS] ,
95: tempnlp -> extra_flags , P2STRTY );
96: putop( P2LISTOP , P2INT );
97: putop( P2CALL , P2PTR | P2STRTY );
98: # endif PC
99: return p;
100: default:
101: error("Variable given, %s required for %s parameter %s" ,
102: typename , typename , formalp -> symbol );
103: return NIL;
104: }
105: }
This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.