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#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include "badlib.h"
#include "lexer.c"
#include "parser.c"
typedef enum ExecMode {
RUN_NORMAL,
PRINT_LEX,
PRINT_PARSE,
PRINT_SEMANTIC,
PRINT_SYMTABLES,
} ExecMode;
static ExecMode mode = RUN_NORMAL;
void
init(void) {
log_init_default();
}
void
process_file(Str path) {
Arena lexer_arena = arena_create(LEXER_MEM, os_allocator);
FileContents file = platform_read_file(path, &lexer_arena);
if (file.err) {
eprintln("%s: error: %s", path, cstr("WOT"));
exit(EXIT_FAILURE);
}
sz errors = 0;
// Lexer.
Scanner scanner = {.str = file.data};
Token *tokens = NULL;
Token tok = {0};
while (tok.kind != TOK_EOF) {
tok = scan_token(&scanner);
if (tok.kind == TOK_UNKNOWN) {
eprintln("%s:%d:%d:%s %s", path, tok.line, tok.col,
token_str[tok.kind], tok.val);
errors++;
continue;
}
array_push(tokens, tok, &lexer_arena);
}
// Only proceed if there are no errors.
if (errors) {
exit(EXIT_FAILURE);
}
if (mode == PRINT_LEX) {
print_tokens(path, tokens);
goto stop;
}
// Parser.
Parser parser = {
.tokens = tokens,
.storage = &lexer_arena,
.file_name = path,
};
array_init(parser.nodes, 256, parser.storage);
parse_advance(&parser);
while (parser.current.kind != TOK_EOF) {
#if DEBUG == 1
static sz ctr = 0;
println("parsing root: %d", ctr++);
#endif
parse_expr(&parser, PREC_LOW);
if (parser.panic) {
break;
}
}
if (parser.err) {
exit(EXIT_FAILURE);
}
if (mode == PRINT_PARSE) {
graph_ast(parser.nodes);
goto stop;
}
sz n_roots = array_size(parser.nodes);
for (sz i = 0; i < n_roots; i++) {
// The parser stores the root nodes as a stack.
Node *root = parser.nodes[i];
(void)root;
}
parse_consume(&parser, TOK_EOF, cstr("expected end of file"));
stop:
// Free up resources.
arena_destroy(&lexer_arena, os_allocator);
}
#ifndef BIN_NAME
#define BIN_NAME "bdl"
#endif
void
print_usage(void) {
printf("Usage: %s [options] <filename filename ...>\n", BIN_NAME);
printf("\n");
printf("\t-h \t\tShow usage.\n");
printf(
"\t-p [l|p|s|t]\tPrint mode for [l]exing, [p]arsing, "
"[s]emantic "
"analysis, symbol [t]ables\n");
printf("\n");
}
int
main(int argc, char *argv[]) {
int option;
while ((option = getopt(argc, argv, "hp:")) != -1) {
switch (option) {
case 'h': {
print_usage();
goto exit_success;
} break;
case 'p': {
if (optarg[0] == 'l' && optarg[1] == '\0') {
mode = PRINT_LEX;
} else if (optarg[0] == 'p' && optarg[1] == '\0') {
mode = PRINT_PARSE;
} else if (optarg[0] == 's' && optarg[1] == '\0') {
mode = PRINT_SEMANTIC;
} else if (optarg[0] == 't' && optarg[1] == '\0') {
mode = PRINT_SYMTABLES;
} else {
print_usage();
return EXIT_FAILURE;
}
} break;
default: {
print_usage();
return EXIT_FAILURE;
} break;
}
}
init();
// Run from stdin.
if (optind == argc) {
// TODO: REPL
// repl();
goto exit_success;
}
// Run from file.
while (optind < argc) {
char *file_name = argv[optind];
Str file_path = STR(file_name);
process_file(file_path);
optind++;
}
exit_success:
return EXIT_SUCCESS;
}
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