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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 "cli.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static char *
cli_args_shift(cli_args_t *args);
static void
cli_opts_parse_output(cli_opts_t *opts, cli_args_t *args);
static void
cli_opts_parse_arch(cli_opts_t *opts, cli_args_t *args);
static void
cli_opts_parse_sysroot(cli_opts_t *opts, cli_args_t *args);
cli_opts_t
cli_parse_args(int argc, char **argv) {
cli_args_t args = {
.argc = argc,
.argv = argv,
};
cli_opts_t opts = { 0 };
opts.compiler_path = cli_args_shift(&args);
char *arg = cli_args_shift(&args);
while (arg != NULL) {
if (strcmp(arg, "--dump-tokens") == 0) {
opts.options |= CLI_OPT_DUMP_TOKENS;
} else if (strcmp(arg, "--dump-ast") == 0) {
opts.options |= CLI_OPT_DUMP_AST;
} else if (strcmp(arg, "--save-temps") == 0) {
opts.options |= CLI_OPT_SAVE_TEMPS;
} else if (strcmp(arg, "-o") == 0) {
cli_opts_parse_output(&opts, &args);
} else if (strcmp(arg, "--arch") == 0) {
opts.options |= CLI_OPT_ARCH;
cli_opts_parse_arch(&opts, &args);
} else if (strcmp(arg, "--sysroot") == 0) {
opts.options |= CLI_OPT_SYSROOT;
cli_opts_parse_sysroot(&opts, &args);
} else {
opts.filepath = arg;
}
arg = cli_args_shift(&args);
}
if (opts.options & CLI_OPT_OUTPUT || opts.options & CLI_OPT_DUMP_TOKENS ||
opts.options & CLI_OPT_DUMP_AST) {
return opts;
}
cli_print_usage(stderr, opts.compiler_path);
exit(EXIT_FAILURE);
return opts;
}
static char *
cli_args_shift(cli_args_t *args) {
if (args->argc == 0)
return NULL;
--(args->argc);
return *(args->argv)++;
}
static void
cli_opts_parse_output(cli_opts_t *opts, cli_args_t *args) {
assert(opts && "opts is required");
assert(args && "args is required");
char *output_bin = cli_args_shift(args);
if (output_bin == NULL) {
fprintf(stderr, "error: missing filename after '-o'\n");
cli_print_usage(stderr, opts->compiler_path);
exit(EXIT_FAILURE);
}
opts->options |= CLI_OPT_OUTPUT;
opts->output_bin = string_view_from_cstr(output_bin);
}
static void
cli_opts_parse_arch(cli_opts_t *opts, cli_args_t *args) {
assert(opts && "opts is required");
assert(args && "args is required");
char *arch = cli_args_shift(args);
if (arch == NULL) {
fprintf(
stderr,
"error: missing architecture for arg '--arch': "
"available options (x86_64 | aarch64)\n"
);
cli_print_usage(stderr, opts->compiler_path);
exit(EXIT_FAILURE);
}
opts->options |= CLI_OPT_ARCH;
opts->arch = arch;
}
static void
cli_opts_parse_sysroot(cli_opts_t *opts, cli_args_t *args) {
assert(opts && "opts is required");
assert(args && "args is required");
char *sysroot = cli_args_shift(args);
if (sysroot == NULL) {
fprintf(stderr, "error: missing sysroot arg '--sysroot'\n");
cli_print_usage(stderr, opts->compiler_path);
exit(EXIT_FAILURE);
}
opts->options |= CLI_OPT_SYSROOT;
opts->sysroot = sysroot;
}
void
cli_print_usage(FILE *stream, char *compiler_path) {
fprintf(
stream,
"Usage: %s [options] file...\n"
"Options:\n"
" --dump-tokens Display lexer token stream\n"
" --dump-ast Display ast tree to stdout\n"
" --arch <arch> Binary arch: default to x86_64 (x86_64 | aarch64)\n"
" --sysroot <dir> System root dir where the GNU Assembler and GNU "
"Linker are located: default to '/'\n"
" -o <file> Compile program into a binary file\n"
" --save-temps Keep temp files used to compile program\n",
compiler_path
);
}
|