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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[] = "@(#)flvalue.c 5.1 (Berkeley) 6/5/85"; ! 9: #endif not lint ! 10: ! 11: #include "whoami.h" ! 12: #include "0.h" ! 13: #include "tree.h" ! 14: #include "opcode.h" ! 15: #include "objfmt.h" ! 16: #include "tree_ty.h" ! 17: #ifdef PC ! 18: # include "pc.h" ! 19: # include <pcc.h> ! 20: #endif PC ! 21: #include "tmps.h" ! 22: ! 23: /* ! 24: * flvalue generates the code to either pass on a formal routine, ! 25: * or construct the structure which is the environment for passing. ! 26: * it tells the difference by looking at the tree it's given. ! 27: */ ! 28: struct nl * ! 29: flvalue( r , formalp ) ! 30: struct tnode *r; /* T_VAR */ ! 31: struct nl *formalp; ! 32: { ! 33: struct nl *p; ! 34: struct nl *tempnlp; ! 35: char *typename; ! 36: #ifdef PC ! 37: char extname[ BUFSIZ ]; ! 38: #endif PC ! 39: ! 40: if ( r == TR_NIL ) { ! 41: return NLNIL; ! 42: } ! 43: typename = formalp -> class == FFUNC ? "function":"procedure"; ! 44: if ( r->tag != T_VAR ) { ! 45: error("Expression given, %s required for %s parameter %s" , ! 46: typename , typename , formalp -> symbol ); ! 47: return NLNIL; ! 48: } ! 49: p = lookup(r->var_node.cptr); ! 50: if (p == NLNIL) { ! 51: return NLNIL; ! 52: } ! 53: switch ( p -> class ) { ! 54: case FFUNC: ! 55: case FPROC: ! 56: if ( r->var_node.qual != TR_NIL ) { ! 57: error("Formal %s %s cannot be qualified" , ! 58: typename , p -> symbol ); ! 59: return NLNIL; ! 60: } ! 61: # ifdef OBJ ! 62: (void) put(2, PTR_RV | bn << 8+INDX, (int)p->value[NL_OFFS]); ! 63: # endif OBJ ! 64: # ifdef PC ! 65: putRV( p -> symbol , bn , p -> value[ NL_OFFS ] , ! 66: p -> extra_flags , ! 67: p2type( p ) ); ! 68: # endif PC ! 69: return p; ! 70: case FUNC: ! 71: case PROC: ! 72: if ( r->var_node.qual != TR_NIL ) { ! 73: error("%s %s cannot be qualified" , typename , ! 74: p -> symbol ); ! 75: return NLNIL; ! 76: } ! 77: if (bn == 0) { ! 78: error("Built-in %s %s cannot be passed as a parameter" , ! 79: typename , p -> symbol ); ! 80: return NLNIL; ! 81: } ! 82: /* ! 83: * allocate space for the thunk ! 84: */ ! 85: tempnlp = tmpalloc((long) (sizeof(struct formalrtn)), NLNIL, NOREG); ! 86: # ifdef OBJ ! 87: (void) put(2 , O_LV | cbn << 8 + INDX , ! 88: (int)tempnlp -> value[ NL_OFFS ] ); ! 89: (void) put(2, O_FSAV | bn << 8, (long)p->value[NL_ENTLOC]); ! 90: # endif OBJ ! 91: # ifdef PC ! 92: putleaf( PCC_ICON , 0 , 0 , ! 93: PCCM_ADDTYPE( PCCTM_PTR , PCCM_ADDTYPE( PCCTM_FTN , PCCTM_PTR|PCCT_STRTY ) ) , ! 94: "_FSAV" ); ! 95: sprintf( extname , "%s" , FORMALPREFIX ); ! 96: sextname( &extname[ strlen( extname ) ] , ! 97: p -> symbol , bn ); ! 98: putleaf( PCC_ICON , 0 , 0 , p2type( p ) , extname ); ! 99: putleaf( PCC_ICON , bn , 0 , PCCT_INT , (char *) 0 ); ! 100: putop( PCC_CM , PCCT_INT ); ! 101: putLV( (char *) 0 , cbn , tempnlp -> value[NL_OFFS] , ! 102: tempnlp -> extra_flags , PCCT_STRTY ); ! 103: putop( PCC_CM , PCCT_INT ); ! 104: putop( PCC_CALL , PCCTM_PTR | PCCT_STRTY ); ! 105: # endif PC ! 106: return p; ! 107: default: ! 108: error("Variable given, %s required for %s parameter %s" , ! 109: typename , typename , formalp -> symbol ); ! 110: return NLNIL; ! 111: } ! 112: }
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