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Second phase of REUSE compliance and header reformat

/*
 *   $Id: objects.c,v 1.3 2025/03/09 19:50:47 snw Exp $
 *    implementation of OO support
 *
 *  
 *   Author: Serena Willis <snw@coherent-logic.com>
 *    Copyright (C) 1998 MUG Deutschland
 *    Copyright (C) 2023, 2025 Coherent Logic Development LLC
 *
 *
 *   This file is part of FreeM.
 *
 *   FreeM is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Affero Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   FreeM 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 Affero Public License for more details.
 *
 *   You should have received a copy of the GNU Affero Public License
 *   along with FreeM.  If not, see <https://www.gnu.org/licenses/>.
 *
 *   $Log: objects.c,v $
 *   Revision 1.3  2025/03/09 19:50:47  snw
 *   Second phase of REUSE compliance and header reformat
 *
 *
 * SPDX-FileCopyrightText:  (C) 2025 Coherent Logic Development LLC
 * SPDX-License-Identifier: AGPL-3.0-or-later
 **/
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <ctype.h>

#include "mpsdef.h"
#include "mref.h"
#include "objects.h"

void obj_init(void)
{
    register int i;

    for (i = 0; i < MAX_PRIVATE_KEYS; i++) {
        private_keys[i][0] = EOL;
    }
}

short obj_is_field_private(char *key)
{
    register int i;

    for (i = 0; i < MAX_PRIVATE_KEYS; i++) {
        if (stcmp (private_keys[i], key) == 0) {
            return TRUE;
        }
    }

    return FALSE;
}

void obj_set_field_private(char *key)
{
    register int i;

    if (obj_is_field_private (key) == TRUE) return;

    for (i = 0; i < MAX_PRIVATE_KEYS; i++) {
        if (private_keys[i][0] == EOL) {
            stcpy (private_keys[i], key);
            return;
        }
    }

    merr_raise (OBJPRIVOVFL);
    return;
}

void obj_set_field_public(char *key)
{
    register int i;

    for (i = 0; i < MAX_PRIVATE_KEYS; i++) {
        if (stcmp (private_keys[i], key) == 0) {
            private_keys[i][0] = EOL;
            return;
        }
    }
}

short obj_is_object(char *inst)
{
    char t_buf[255];

    return obj_get_attribute (inst, "CLASS", t_buf);
}

short obj_instance_of(char *inst, char *class)
{
    char t_buf[255];
    short res;
    
    res = obj_get_attribute (inst, "CLASS", t_buf);

    if ((res == FALSE) || (strcmp (t_buf, class) != 0)) {
        return FALSE;
    }

    return TRUE;    
}

void obj_set_attribute(char *inst, char *attrib, char *value)
{
    char t_key[255];
    char t_data[255];

    snprintf (t_key, 254, "^$OBJECT\202%s\202%s\201", inst, attrib);
    snprintf (t_data, 254, "%s\201", value);

    symtab_bltin (set_sym, t_key, t_data);
}

short obj_get_attribute(char *inst, char *attrib, char *buf)
{
    char t_key[255];

    snprintf (t_key, 254, "^$OBJECT\202%s\202%s\201", inst, attrib);

    symtab_bltin (get_sym, t_key, buf);

    if (merr () == UNDEF || merr () == M6) {
        
        if (strcmp (attrib, "CLASS") == 0) {
            // non-object variables always belong to the ^%STRING class
            snprintf (buf, 9, "^%%STRING");

            merr_clear ();
            return TRUE;
            
        }
        else {
            merr_clear ();
            return FALSE;
        }
    }
    else {
        stcnv_m2c (buf);
        return TRUE;
    }
    
}

void obj_destroy(char *inst)
{
    char t_key[255];

    snprintf (t_key, 254, "^$OBJECT\202\%s\201", inst);
    symtab_bltin (kill_sym, t_key, " \201");
}

void obj_create_symbols(char *objvar, char *class)
{
    char t_key[255];
    char t_data[255];

    snprintf (t_key, 254, "%s\201", objvar);
    snprintf (t_data, 254, " \201");

    symtab_bltin (set_sym, t_key, t_data);

    obj_set_attribute (objvar, "CLASS", class);
        
}

void obj_get_constructor(char *constructor, char *class, char *instvar)
{
    freem_ref_t inref;
    freem_ref_t outref;
    register int i;
    int argct;

    argct = 0;
    
    mref_init (&inref, MREF_RT_GLOBAL, "");
    internal_to_mref (&inref, class);
    mref_init (&outref, MREF_RT_GLOBAL, inref.name);
    
    strcpy (outref.name, inref.name);
    outref.subscript_count = inref.subscript_count + 1;

    snprintf (outref.subscripts[0], 255, ".%s", instvar);

    for (i = 0; i < inref.subscript_count; i++) {
        strcpy (outref.subscripts[i + 1], inref.subscripts[i]);
    }

//    mref_to_internal_prealloc (constructor, &outref);
    mref_to_external (&outref, constructor);
    return;

    /*
    for (i = 0; i < stlen (constructor); i++) {

        switch (constructor[i]) {
            case '\202':
                if (argct == 0) {
                    constructor[i] = '(';
                    argct++;
                }
                else {
                    constructor[i] = ',';
                    argct++;
                }
                break;
            case '\201':
                constructor[i] = ')';
        }
        
    }
    constructor[i] = ')';

    if (argct > 1) ierr = ARGLIST;
    */
}