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/*
* Copyright (C) 2026 Peter Mikkelsen <petermikkelsen10@gmail.com>
*
* This file is part of aplwc.
*
* Aplwc 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 3 of the License, or
* (at your option) any later version.
*
* Aplwc 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 aplwc. If not, see <https://www.gnu.org/licenses/>.
*/
#include "aplwc_internal.h"
#include "boot.h"
struct aplwc *
aplwc_new(struct aplwc_fns fns, enum aplwc_rc *rcp)
{
enum aplwc_rc rc;
struct aplwc *aplwc;
aplwc = NULL;
if(fns.alloc == NULL){
rc = APLWC_OUT_OF_MEMORY;
goto end;
}
aplwc = fns.alloc(sizeof(*aplwc), NULL);
if(aplwc == NULL){
rc = APLWC_OUT_OF_MEMORY;
goto end;
}
aplwc->modules = NULL;
aplwc->fns = fns;
memory_init(aplwc);
rc = aplwc_load_module(aplwc, "Boot", (const char *)boot_src, boot_src_len);
end:
if(rc != APLWC_OK){
aplwc_destroy(aplwc);
aplwc = NULL;
}
assert(rcp);
*rcp = rc;
return aplwc;
}
void
aplwc_destroy(struct aplwc *p)
{
if(p == NULL)
return;
memory_destroy(p);
if(p->fns.dealloc)
p->fns.dealloc(p);
}
const char *
aplwc_errstr_rc(enum aplwc_rc rc)
{
switch(rc){
case APLWC_OK:
return "";
case APLWC_OUT_OF_MEMORY:
return "Out of memory";
case APLWC_NOT_YET_IMPLEMENTED:
return "Not yet implemented";
case APLWC_INVALID_UTF8:
return "Invalid UTF-8";
case APLWC_INVALID_SYNTAX:
return "Invalid syntax";
default:
return "(unable to produce error string)";
}
}
const char *
aplwc_errstr(struct aplwc *aplwc)
{
enum { BUF_SIZE = 256 };
const char *err;
enum aplwc_rc rc;
err = NULL;
rc = aplwc ? aplwc->last_error : APLWC_RC_LAST+1;
err = aplwc_errstr_rc(rc);
return err;
}
enum aplwc_rc
aplwc_last_error(struct aplwc *aplwc)
{
return aplwc->last_error;
}
void
aplwc_read(struct aplwc *aplwc, const char *linestr, AplwcLine *lineptr)
{
struct string *text;
struct token_list *tokens;
struct aplwc_line *line;
MEMPTRS(aplwc, 2);
aplwc_clear_line(lineptr);
if((text = chars_to_string(aplwc, linestr, -1)) == NULL)
goto end;
MEMPTR(0, text);
if((tokens = scan_string(aplwc, text, 1)) == NULL)
goto end;
MEMPTR(1, tokens);
if((aplwc->last_error = check_tokens(tokens)) != APLWC_OK)
goto end;
if((line = memory_alloc_aplwc_line(aplwc)) == NULL)
goto end;
line->text = text;
line->tokens = tokens;
memory_root_new(aplwc, line, &lineptr->ref);
end:
MEMPTRS_EXIT(aplwc);
}
void
aplwc_free_line(AplwcLine *line)
{
memory_root_free(&line->ref);
}
void
aplwc_eval(AplwcLine *line, AplwcValue *value)
{
struct aplwc_line *l;
struct aplwc_value *v;
struct aplwc *aplwc;
aplwc = line->ref.aplwc;
aplwc_clear_value(value);
l = memory_root_get(&line->ref);
aplwc->last_error = APLWC_OK;
v = eval_line(aplwc, l);
if(v)
memory_root_new(aplwc, v, &value->ref);
}
void
aplwc_free_value(AplwcValue *value)
{
memory_root_free(&value->ref);
}
const char *
aplwc_value_string(AplwcValue *value)
{
struct aplwc_value *v;
assert(aplwc_valid_value(value));
v = memory_root_get(&value->ref);
switch(v->tag){
default:
return "???";
}
}
enum aplwc_rc
aplwc_load_module(struct aplwc *aplwc, const char *name, const char *src, int srclen)
{
struct string *text, *namestr;
struct token_list *tokens;
MEMPTRS(aplwc, 3);
if((namestr = chars_to_string(aplwc, name, -1)) == NULL)
goto end;
MEMPTR(0, namestr);
if((text = chars_to_string(aplwc, src, srclen)) == NULL)
goto end;
MEMPTR(1, text);
if((tokens = scan_string(aplwc, text, 0)) == NULL)
goto end;
MEMPTR(2, tokens);
aplwc->last_error = load_module(aplwc, namestr, tokens);
end:
MEMPTRS_EXIT(aplwc);
return aplwc_last_error(aplwc);
}
void
aplwc_clear_value(AplwcValue *v)
{
clear_ref(&v->ref);
}
void
aplwc_clear_line(AplwcLine *l)
{
clear_ref(&l->ref);
}
int
aplwc_valid_value(AplwcValue *v)
{
return valid_ref(&v->ref);
}
int
aplwc_valid_line(AplwcLine *l)
{
return valid_ref(&l->ref);
}
uint64_t aplwc_simulate_failure_at;
uint64_t aplwc_simulate_failure_count;
int
aplwc_simulate_failure(void)
{
aplwc_simulate_failure_count++;
if(aplwc_simulate_failure_at && (aplwc_simulate_failure_count >= aplwc_simulate_failure_at))
return 1;
else
return 0;
}
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