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/*
Clif - A C-like Interpreter Framework
Copyright (C) 1998, L. Koren
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
struct var_s
{
char *adr;
int offset;
char *name;
};
#include <stdio.h>
#include "allocx.h"
#include "flags.h"
#include "global.h"
#include "pso.h"
#include "tables.h"
#include "type.h"
#include "struct.h"
#include "comp_maint.h"
#include "instr.h"
#include "geninstr.h"
/* Lookup in tables of local variables, if the variable is not found
in the table of global variables. Setting of addresses for code
generation. */
void
lookup_tables (var_name, variable)
char *var_name;
struct var_s variable[];
{
struct ident_tab_loc *loc_var;
if (NULL == (loc_var = point_loc (var_name)))
{
struct ident_tab *var;
var = point (var_name);
if (NULL == var)
COMPILE_ONLY;
if ((STRUCT_P(var->type)
|| UNION_P(var->type))
&& -1 == add_to_ident_list ())
COMPILE_ONLY;
variable[++set].adr = var->adr;
variable[set].name = var_name;
variable[set].offset = 0;
type_com[set] = var->type;
}
else
{
/* Address is non NULL only if the
local variable is declared static. */
if (NULL != loc_var->adr)
{
variable[set].offset = 0;
variable[set].adr = loc_var->adr;
variable[set].name = var_name;
}
else
{
/* First part of the offset is set in the
point_loc function. */
variable[set].offset += loc_var->offset;
variable[set].adr = NULL;
variable[set].name = var_name;
}
type_com[set] = loc_var->type;
}
if (NULL == type_com[set]->output)
type_ac[set] = type_com[set]->attribute.arit_class;
else if (LOCAL_P(type_com[set])
|| REMOTE_P(type_com[set]))
{
type_ac[set] =
type_com[set]->output->attribute.arit_class;
proc_name_text[++proc] = text;
}
else if (ARRAY_P(type_com[set]))
{
type_ac[set] =
type_com[set]->output->attribute.arit_class;
array_subscript (type_com[set]->input);
}
else if (POINTER_P(type_com[set]))
type_ac[set] = LONG_AC | INTEGER;
kodp4 = kodp;
if (0 < variable[set].offset)
{
if (call_by_value)
{
if (ARRAY_P(type_com[set]))
{
GEN_PUSHArr(variable[set].offset);
}
else
{
GEN_PUSHAr(variable[set].offset);
}
}
else if (call_by_reference)
{
GEN_PUSHArr(variable[set].offset);
}
GENCODE;
}
else if (0 > variable[set].offset)
{
GEN_PUSHAr(variable[set].offset); GENCODE;
}
else if (! LOCAL_P(type_com[set])
&& ! REMOTE_P(type_com[set]))
{
GEN_PUSHA(variable[set].adr); GENCODE;
}
}
/* The typedef structure (only the beginning part) is copied, if
any non simple part was inserted, i.e. pointer, function, array,
struct, etc. */
void
typedef_copy (type)
struct internal_type *type;
{
typeh[type_spec_count] = (struct internal_type *)
allocate (sizeof(struct internal_type),
scope_level > PERM ? BLOCK : PERM);
init_zero ((char *)typeh[type_spec_count],
sizeof(struct internal_type));
typeh[type_spec_count]->attribute.function_class =
SIMPLE;
typeh[type_spec_count]->attribute.type_qualifier =
UNDEF_TQ;
typeh[type_spec_count]->attribute.arit_class =
UNUSED_AC;
typeh[type_spec_count]->attribute.storage_class_specifier =
TYPEDEF_SC;
typeh[type_spec_count]->output = type;
}
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