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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/>.
*/
#define _POSIX_C_SOURCE 200809L
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include "aplwc_repl.h"
static void *
my_alloc(size_t min, size_t max, size_t *actual)
{
UNUSED_PARAMETER(max);
*actual = min;
return malloc(min);
}
static void
my_dealloc(void *p)
{
free(p);
}
int
main(int argc, char *argv[])
{
struct aplwc_fns fns;
struct aplwc *aplwc;
enum aplwc_rc ret;
AplwcLine line;
AplwcValue value;
char *input, *src;
int exit_code, line_number;
size_t input_size, src_size, i;
int opt, xflag, input_file;
long tmp;
FILE *f;
aplwc_clear_line(&line);
aplwc_clear_value(&value);
input = NULL;
xflag = 0;
input_file = 0;
exit_code = 0;
line_number = 0;
memset(&fns, 0, sizeof(fns));
fns.alloc = my_alloc;
fns.dealloc = my_dealloc;
while((opt = getopt(argc, argv, "x")) != -1){
switch(opt){
case 'x':
xflag = 1;
break;
default:
usage:
fprintf(stderr, "Usage: %s [-x] [file]\n", argv[0]);
return 1;
}
}
if((optind+1) == argc){
input_file = 1;
f = fopen(argv[optind], "r");
if(f == NULL){
fprintf(stderr, "Could not open file: %s: %s\n", argv[optind], strerror(errno));
return 1;
}
}else if(optind == argc)
f = stdin;
else
goto usage;
aplwc = aplwc_new(fns, &ret);
if(ret){
fprintf(stderr, "Couldn't create new aplwc instance: %s\n", aplwc_errstr_rc(ret));
return 1;
}
if(input_file){
if(fseek(f, 0, SEEK_END)){
file_size:
fprintf(stderr, "Failed to determine file size\n");
return 1;
}
tmp = ftell(f);
if(tmp < 0)
goto file_size;
input_size = tmp;
rewind(f);
input = malloc(input_size);
if(input == NULL){
fprintf(stderr, "Failed to allocate space for file contents\n");
return 1;
}
if(fread(input, 1, input_size, f) < input_size){
fprintf(stderr, "Failed to read file contents\n");
return 1;
}
fclose(f);
src = input;
src_size = input_size;
if((input_size > 2) && (input[0] == '#') && (input[1] == '!')){
for(i = 0; i < input_size; i++){
if(input[i] == '\n'){
src += i;
src_size -= i;
xflag = 1;
break;
}
}
}
ret = aplwc_load_module(aplwc, "Main", src, src_size);
if(ret){
fprintf(stderr, "Couldn't load Main module from file %s: %s\n", argv[optind], aplwc_errstr_rc(ret));
return 1;
}
free(input);
input = NULL;
}
if(xflag)
goto exit;
for(;;){
if(input)
free(input);
if(aplwc_valid_line(line))
aplwc_free_line(line);
if(aplwc_valid_value(value))
aplwc_free_value(value);
input = NULL;
if(getline(&input, &input_size, stdin) < 0){
free(input);
input = NULL;
break;
}else{
line_number++;
line = aplwc_read(aplwc, input);
if(!aplwc_valid_line(line)){
line_error:
fprintf(stderr, "error on line %d: %s: %s\n", line_number, aplwc_errstr(aplwc), input);
if(input_file){
exit_code = 1;
goto exit;
}
continue;
}
value = aplwc_eval(line);
if(!aplwc_valid_value(value))
goto line_error;
fprintf(stdout, "%s\n", aplwc_value_string(value));
}
}
exit:
if(input)
free(input);
if(aplwc_valid_line(line))
aplwc_free_line(line);
if(aplwc_valid_value(value))
aplwc_free_value(value);
aplwc_destroy(aplwc);
return exit_code;
}
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