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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: }
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