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| | /*
* Copyright (C) 2024 olang maintainers
*
* 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 3 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, see <https://www.gnu.org/licenses/>.
*/
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "lexer.h"
#include "string_view.h"
typedef struct cli_args
{
int argc;
char **argv;
} cli_args_t;
char *
cli_args_shift(cli_args_t *args);
typedef struct cli_opts
{
bool dump_tokens;
char *file_path;
} cli_opts_t;
void
print_usage(FILE *stream, char *prog);
static void
print_token(char *file_path, token_t *token);
string_view_t
read_entire_file(char *file_path);
int
main(int argc, char **argv)
{
cli_args_t args = { .argc = argc, .argv = argv };
cli_opts_t opts = { 0 };
char *prog = cli_args_shift(&args);
if (argc != 3) {
print_usage(stderr, prog);
return EXIT_FAILURE;
}
for (char *arg = cli_args_shift(&args); arg != NULL; arg = cli_args_shift(&args)) {
if (strcmp(arg, "--dump-tokens") == 0) {
opts.dump_tokens = true;
} else {
opts.file_path = arg;
}
}
if (!opts.dump_tokens) {
print_usage(stderr, prog);
return EXIT_FAILURE;
}
string_view_t file_content = read_entire_file(opts.file_path);
lexer_t lexer = { 0 };
lexer_init(&lexer, file_content);
token_t token = { 0 };
lexer_next_token(&lexer, &token);
while (token.kind != TOKEN_EOF) {
print_token(opts.file_path, &token);
lexer_next_token(&lexer, &token);
}
print_token(opts.file_path, &token);
free(file_content.chars);
return EXIT_SUCCESS;
}
char *
cli_args_shift(cli_args_t *args)
{
if (args->argc == 0)
return NULL;
--(args->argc);
return *(args->argv)++;
}
void
print_usage(FILE *stream, char *prog)
{
fprintf(stream, "usage: %s <source.0> --dump-tokens\n", prog);
}
string_view_t
read_entire_file(char *file_path)
{
FILE *stream = fopen(file_path, "rb");
if (stream == NULL) {
fprintf(stderr, "Could not open file %s: %s\n", file_path, strerror(errno));
exit(EXIT_FAILURE);
}
string_view_t file_content = { 0 };
fseek(stream, 0, SEEK_END);
file_content.size = ftell(stream);
fseek(stream, 0, SEEK_SET);
file_content.chars = (char *)malloc(file_content.size);
if (file_content.chars == NULL) {
fprintf(stderr, "Could not read file %s: %s\n", file_path, strerror(errno));
exit(EXIT_FAILURE);
}
fread(file_content.chars, 1, file_content.size, stream);
fclose(stream);
return file_content;
}
static void
print_token(char *file_path, token_t *token)
{
printf("%s:%lu:%lu: <%s>\n",
file_path,
token->location.row + 1,
(token->location.offset - token->location.bol) + 1,
token_kind_to_cstr(token->kind));
}
|