fis-gtm/sr_port/eval_expr.c

122 lines
2.9 KiB
C

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