125 lines
2.9 KiB
C
125 lines
2.9 KiB
C
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/****************************************************************
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* *
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* Copyright 2001, 2011 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "compiler.h"
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#include "opcode.h"
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#include "toktyp.h"
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#include "advancewindow.h"
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#include "compile_pattern.h"
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GBLREF triple *curtchain;
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GBLREF char director_token, window_token;
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error_def(ERR_EXPR);
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error_def(ERR_RHMISSING);
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LITREF octabstruct oc_tab[];
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LITREF toktabtype tokentable[];
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int eval_expr(oprtype *a)
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{
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triple *ref, *parm, *ref1;
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int op_count;
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oprtype x1, x2;
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opctype i;
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unsigned short type;
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bool ind_pat;
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DCL_THREADGBL_ACCESS;
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SETUP_THREADGBL_ACCESS;
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if (!expratom(&x1))
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{ /* If didn't already add an error of our own, do so now with catch all expression error */
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if (OC_RTERROR != curtchain->exorder.bl->exorder.bl->exorder.bl->opcode)
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stx_error(ERR_EXPR);
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return EXPR_FAIL;
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}
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while (i = tokentable[window_token].bo_type)
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{
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type = tokentable[window_token].opr_type;
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if (oc_tab[i].octype & OCT_BOOL)
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{
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if (!TREF(shift_side_effects))
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{
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for (ref = curtchain->exorder.bl; oc_tab[ref->opcode].octype & OCT_BOOL; ref = ref->exorder.bl)
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;
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TREF(expr_start) = TREF(expr_start_orig) = ref;
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}
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switch (i)
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{
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case OC_NAND:
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case OC_AND:
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case OC_NOR:
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case OC_OR:
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TREF(shift_side_effects) = -TRUE; /* "special" TRUE triggers warning in expritem */
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break;
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default:
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if (!TREF(shift_side_effects))
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TREF(shift_side_effects) = TRUE;
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}
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}
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coerce(&x1, type);
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if (OC_CAT == i)
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{
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ref1 = ref = maketriple(OC_CAT);
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for (op_count = 2; ; op_count++) /* op_count = first operand plus destination */
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{
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parm = newtriple(OC_PARAMETER);
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ref1->operand[1] = put_tref(parm);
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ref1 = parm;
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ref1->operand[0] = x1;
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if (TK_UNDERSCORE != window_token)
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{
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assert(op_count > 1);
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ref->operand[0] = put_ilit(op_count);
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ins_triple(ref);
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break;
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}
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advancewindow();
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if (!expratom(&x1))
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{
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stx_error(ERR_RHMISSING);
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return EXPR_FAIL;
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}
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coerce(&x1, type);
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}
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} else
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{
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if ((TK_QUESTION == window_token) || (TK_NQUESTION == window_token))
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{
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ind_pat = FALSE;
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if (TK_ATSIGN == director_token)
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{
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ind_pat = TRUE;
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advancewindow();
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}
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if (!compile_pattern(&x2, ind_pat))
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return EXPR_FAIL;
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} else
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{
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advancewindow();
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if (!expratom(&x2))
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{
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stx_error(ERR_RHMISSING);
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return EXPR_FAIL;
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}
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}
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coerce(&x2, type);
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ref = newtriple(i);
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ref->operand[0] = x1;
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ref->operand[1] = x2;
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}
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x1 = put_tref(ref);
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}
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*a = x1;
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return (OC_INDGLVN == curtchain->exorder.bl->opcode) ? EXPR_INDR : EXPR_GOOD;
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}
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