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extern strlen = (*i8) => i64;
extern memcpy = (*i8, *i8, i64) => void;
import "!stdlib.src";
let file_size = 0;
let file = 0;
let buf = 0;
let offset = 0;
let tokens = 0;
let tokens_len = 0;
let read_file = (filename: *i8) => *i8 {
file = fopen(filename, "r");
fseek(file, 0, 2);
file_size = ftell(file);
fseek(file, 0, 0);
buf = malloc(file_size + 1);
let bytes_read = fread(buf, 1, file_size, file);
(*(buf + bytes_read)) = '\0';
return buf;
};
let add_token = (tokens: *i8, token: *i8) => i64 {
printf("Add token: %s\n", token);
let i = 0;
while true {
let c = (*(token + i));
(*(tokens + tokens_len)) = c;
tokens_len = tokens_len + 1;
i = i + 1;
if c == '\0' {
return 0;
};
};
return 0;
};
let print_tokens = (tokens: *i8) => i64 {
let i = 0;
while i < tokens_len {
let c = (*(tokens + i));
if c == '\0' {
c = '\n';
};
printf("%c", c);
i = i + 1;
};
return 0;
};
let tokenizer_skip_whitespace = () => void {
while true {
if offset >= file_size { return; };
let c = (*(buf + offset));
printf("C: %c\n", c);
if !iswhitespace(c) {
return;
};
offset = offset + 1;
};
return;
};
let tokenizer_accept_string = (str: *i8) => bool {
let str_len = strlen(str);
if offset + str_len > file_size { return false; };
let s = malloc(1000);
memcpy(s, buf + offset, str_len);
printf("Accept string: %s\n", s);
if strcmp(s, str) {
offset = offset + str_len;
return true;
};
return false;
};
let tokenizer_skip_comments = () => void {
if !tokenizer_accept_string("/*") { return; };
while !tokenizer_accept_string("*/") {
offset = offset + 1;
};
return;
};
let tokenizer_next = () => *i8 {
tokenizer_skip_whitespace();
tokenizer_skip_comments();
tokenizer_skip_whitespace();
if offset >= file_size {
return "EOF";
};
if tokenizer_accept_string("import") {
return "import";
};
let c = (*(buf + offset));
offset = offset + 1;
let t = malloc(2);
(*(t + 0)) = c;
(*(t + 1)) = '\0';
return t;
};
let tokenizer_init = (filename: *i8) => i64 {
let buf = read_file(filename);
printf("File size: %d\n", file_size);
printf("%s\n", buf);
tokens = malloc(10000);
while true {
let t = tokenizer_next();
if strcmp(t, "EOF") {
break;
};
add_token(tokens, t);
};
printf("PRINT TOKENS\n");
print_tokens(tokens);
return 0;
};
let tokenizer_deinit = () => i64 {
free(tokens);
free(buf);
fclose(file);
return 0;
};
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