feat add func call and rewrite codes

ccompiler/frontend/parser/parser.c

@@ -1,67 +1,17 @@
 #include "parser.h"
 #include "type.h"
-#include "ast/ast.h"
 
-int poptok(struct Parser* parser) {
-    if (parser->size == 0) {
-        return -1;
-    }
-    int idx = parser->cur_idx;
-    parser->cur_idx = (idx + 1) % PARSER_MAX_TOKEN_QUEUE;
-    parser->size--;
-    return 0;
-}
-
-void flushpeektok(struct Parser* parser) {
-    parser->peek_idx = parser->cur_idx;
-}
-
-struct Token* peektok(struct Parser* parser) {
-    int idx = parser->peek_idx;
-    idx = (idx + 1) % PARSER_MAX_TOKEN_QUEUE;
-    if (parser->size >= PARSER_MAX_TOKEN_QUEUE) {
-        warn("peek maybe too deep");
-    }
-    if (parser->peek_idx == parser->end_idx) {
-        if (parser->size == PARSER_MAX_TOKEN_QUEUE) {
-            // FIXME
-            error("buffer overflow");
-        }
-        get_valid_token(parser->lexer, &(parser->TokenBuffer[idx]));
-        parser->size++;
-        parser->end_idx = idx;
-    }
-    
-    parser->peek_idx = idx;
-    return &(parser->TokenBuffer[idx]);
-}
-
-enum TokenType peektoktype(struct Parser* parser) {
-    return peektok(parser)->type;
-}
-
-void expecttok(struct Parser* parser, enum TokenType type) {
-    struct Token* tok = peektok(parser);
-    if (tok->type != type) {
-        error("expected tok: %s, got %s", get_token_name(type), get_token_name(tok->type));
-    } else {
-        poptok(parser);
-    }
-}
-
-void init_parser(struct Parser* parser, struct Lexer* lexer, struct SymbolTable* symtab) {
+void init_parser(parser_t* parser, lexer_t* lexer, symtab_t* symtab) {
     parser->cur_node = NULL;
     parser->root = NULL;
 
-    parser->cur_idx = 0;
-    parser->peek_idx = 0;
-    parser->end_idx = 0;
-    parser->size = 0;
     parser->lexer = lexer;
     parser->symtab = symtab;
-    // TODO
+    init_tokbuf(&parser->tokbuf, lexer, (get_tokbuf_func)get_valid_token);
+    parser->tokbuf.cap = sizeof(parser->TokenBuffer) / sizeof(parser->TokenBuffer[0]);
+    parser->tokbuf.buf = parser->TokenBuffer;
 }
 
-void run_parser(struct Parser* parser) {
+void run_parser(parser_t* parser) {
     parse_prog(parser);
 }