154 lines
4.4 KiB
C
154 lines
4.4 KiB
C
/****************************************************************
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* *
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* Copyright 2001, 2012 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 "gtm_string.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 "mdq.h"
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#include "mmemory.h"
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#include "advancewindow.h"
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#include "fullbool.h"
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error_def(ERR_COLON);
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error_def(ERR_SELECTFALSE);
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LITREF octabstruct oc_tab[];
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#define SELECT_CLEANUP \
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{ \
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free(TREF(side_effect_base)); \
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TREF(side_effect_base) = save_se_base; \
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TREF(side_effect_depth) = save_se_depth; \
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TREF(expr_depth) = save_expr_depth; \
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}
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int f_select(oprtype *a, opctype op)
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{
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boolean_t first_time, save_saw_side, *save_se_base, save_shift, shifting;
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opctype old_op;
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oprtype *cnd, endtrip, target, tmparg;
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triple *oldchain, *r, *ref, *save_start, *save_start_orig, tmpchain, *triptr;
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uint4 save_expr_depth, save_se_depth;
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DCL_THREADGBL_ACCESS;
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SETUP_THREADGBL_ACCESS;
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save_expr_depth = TREF(expr_depth);
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save_start = TREF(expr_start);
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save_start_orig = TREF(expr_start_orig);
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save_saw_side = TREF(saw_side_effect);
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save_shift = TREF(shift_side_effects);
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save_se_base = TREF(side_effect_base);
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save_se_depth = TREF(side_effect_depth);
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TREF(expr_depth) = 0;
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TREF(expr_start) = TREF(expr_start_orig) = NULL;
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TREF(saw_side_effect) = FALSE;
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TREF(shift_side_effects) = FALSE;
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TREF(side_effect_depth) = INITIAL_SIDE_EFFECT_DEPTH;
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TREF(side_effect_base) = malloc(SIZEOF(boolean_t) * TREF(side_effect_depth));
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memset((char *)(TREF(side_effect_base)), 0, SIZEOF(boolean_t) * TREF(side_effect_depth));
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if (shifting = (save_shift && (!save_saw_side || (GTM_BOOL == TREF(gtm_fullbool))))) /* NOTE assignment */
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{
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dqinit(&tmpchain, exorder);
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oldchain = setcurtchain(&tmpchain);
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}
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r = maketriple(op);
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first_time = TRUE;
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endtrip = put_tjmp(r);
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for (;;)
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{
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cnd = (oprtype *)mcalloc(SIZEOF(oprtype));
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if (!bool_expr(FALSE, cnd))
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{
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SELECT_CLEANUP;
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if (shifting)
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setcurtchain(oldchain);
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return FALSE;
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}
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if (TK_COLON != TREF(window_token))
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{
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SELECT_CLEANUP;
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if (shifting)
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setcurtchain(oldchain);
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stx_error(ERR_COLON);
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return FALSE;
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}
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advancewindow();
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if (EXPR_FAIL == expr(&tmparg, MUMPS_EXPR))
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{
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SELECT_CLEANUP;
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if (shifting)
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setcurtchain(oldchain);
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return FALSE;
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}
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assert(TRIP_REF == tmparg.oprclass);
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old_op = tmparg.oprval.tref->opcode;
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if (first_time)
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{
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if ((OC_LIT == old_op) || (oc_tab[old_op].octype & OCT_MVADDR))
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{
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ref = newtriple(OC_STOTEMP);
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ref->operand[0] = tmparg;
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tmparg = put_tref(ref);
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}
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r->operand[0] = target = tmparg;
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first_time = FALSE;
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} else
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{
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ref = newtriple(OC_STO);
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ref->operand[0] = target;
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ref->operand[1] = tmparg;
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if (OC_PASSTHRU == tmparg.oprval.tref->opcode)
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{
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assert(TRIP_REF == tmparg.oprval.tref->operand[0].oprclass);
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ref = newtriple(OC_STO);
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ref->operand[0] = target;
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ref->operand[1] = put_tref(tmparg.oprval.tref->operand[0].oprval.tref);
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}
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}
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ref = newtriple(OC_JMP);
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ref->operand[0] = endtrip;
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tnxtarg(cnd);
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if (TK_COMMA != TREF(window_token))
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break;
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advancewindow();
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}
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tmparg = put_ilit(ERR_SELECTFALSE);
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ref = newtriple(OC_RTERROR);
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ref->operand[0] = tmparg;
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ref->operand[1] = put_ilit(FALSE); /* Not a subroutine reference */
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ins_triple(r);
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assert(!TREF(expr_depth));
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TREF(expr_start) = save_start;
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TREF(expr_start_orig) = save_start_orig;
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TREF(saw_side_effect) = save_saw_side;
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TREF(shift_side_effects) = save_shift;
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SELECT_CLEANUP;
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TREF(expr_depth) = save_expr_depth;
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if (shifting)
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{
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shifting = ((TREF(expr_start) != TREF(expr_start_orig)) && (OC_NOOP != (TREF(expr_start))->opcode));
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newtriple(shifting ? OC_GVSAVTARG : OC_NOOP); /* must have one of these two at expr_start */
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setcurtchain(oldchain);
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dqadd(TREF(expr_start), &tmpchain, exorder);
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TREF(expr_start) = tmpchain.exorder.bl;
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if (shifting)
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{ /* only play this game if something else started it */
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assert(OC_GVSAVTARG == (TREF(expr_start))->opcode);
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triptr = newtriple(OC_GVRECTARG);
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triptr->operand[0] = put_tref(TREF(expr_start));
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}
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}
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*a = put_tref(r);
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return TRUE;
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}
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