118 lines
3.2 KiB
C
118 lines
3.2 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2013 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 "indir_enum.h"
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#include "toktyp.h"
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#include "mmemory.h"
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#include "mdq.h"
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#include "advancewindow.h"
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#include "fullbool.h"
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#include "glvn_pool.h"
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#include "show_source_line.h"
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GBLREF boolean_t run_time;
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GBLREF short int source_column;
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error_def(ERR_SIDEEFFECTEVAL);
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error_def(ERR_VAREXPECTED);
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int f_get(oprtype *a, opctype op)
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{
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boolean_t ok, used_glvn_slot;
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oprtype control_slot, def_opr, *def_oprptr, indir;
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short int column;
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triple *oldchain, *opptr, *r, *triptr;
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save_se save_state;
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DCL_THREADGBL_ACCESS;
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SETUP_THREADGBL_ACCESS;
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oldchain = NULL;
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used_glvn_slot = FALSE;
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r = maketriple(OC_NOOP); /* We'll fill in the opcode later, when we figure out what it is */
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switch (TREF(window_token))
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{
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case TK_IDENT:
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r->opcode = OC_FNGET;
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ok = lvn(&r->operand[0], OC_SRCHINDX, 0);
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break;
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case TK_CIRCUMFLEX:
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r->opcode = OC_FNGVGET;
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ok = gvn();
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break;
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case TK_ATSIGN:
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r->opcode = OC_INDGET2;
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if (SHIFT_SIDE_EFFECTS)
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START_GVBIND_CHAIN(&save_state, oldchain);
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if (ok = indirection(&indir)) /* NOTE: assignment */
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{
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used_glvn_slot = TRUE;
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INSERT_INDSAVGLVN(control_slot, indir, ANY_SLOT, 1);
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r->operand[0] = control_slot;
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}
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break;
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default:
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ok = FALSE;
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break;
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}
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if (!ok)
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{
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if (NULL != oldchain)
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setcurtchain(oldchain);
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stx_error(ERR_VAREXPECTED);
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return FALSE;
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}
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opptr = r;
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ins_triple(r);
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if (used_glvn_slot)
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{ /* house cleaning for the indirection */
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triptr = newtriple(OC_GLVNPOP);
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triptr->operand[0] = control_slot;
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}
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if (TK_COMMA == TREF(window_token))
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{ /* two argument form with a specified default value */
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advancewindow();
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column = source_column;
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def_oprptr = (oprtype *)mcalloc(SIZEOF(oprtype));
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def_opr = put_indr(def_oprptr);
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DISABLE_SIDE_EFFECT_AT_DEPTH; /* doing this here let's us know specifically if direction had SE threat */
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if (EXPR_FAIL == expr(def_oprptr, MUMPS_EXPR))
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{
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if (NULL != oldchain)
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setcurtchain(oldchain);
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return FALSE;
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}
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if (SE_WARN_ON && (TREF(side_effect_base))[TREF(expr_depth)])
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ISSUE_SIDEEFFECTEVAL_WARNING(column - 1);
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if (OC_FNGET == r->opcode)
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r->opcode = OC_FNGET1;
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else if (OC_FNGVGET == r->opcode)
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r->opcode = OC_FNGVGET1;
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else
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assert(OC_INDGET2 == r->opcode);
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r = newtriple(OC_FNGET2);
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r->operand[0] = put_tref(opptr);
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r->operand[1] = def_opr;
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} else if (OC_INDGET2 == r->opcode)
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{ /* indirect always acts like a two argument form so force that along with an empty string default */
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r = newtriple(OC_FNGET2);
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r->operand[0] = put_tref(opptr);
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r->operand[1] = put_str(0, 0);
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}
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if (NULL != oldchain)
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PLACE_GVBIND_CHAIN(&save_state, oldchain); /* shift chain back to "expr_start" */
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*a = put_tref(r);
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return TRUE;
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}
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