refactor: 重构前端代码并添加日志功能

- 重命名和重构了多个文件，包括 lexer、parser 和 AST 相关代码
- 添加了日志功能，使用 LOG_* 宏替代原有的 error 和 warn 函数
- 优化了错误处理和内存分配方式
- 调整了代码结构，提高了模块化和可读性

lib/rt/std/rt_api_def.h

@@ -0,0 +1,64 @@
+#ifndef __SMCC_RT_API_DEF_H__
+#define __SMCC_RT_API_DEF_H__
+
+#include "rt_type.h"
+
+#ifndef __RT_SIZE_TYPE__
+#define __RT_SIZE_TYPE__
+typedef usz_t rt_size_t;
+#endif
+typedef void*   (*rt_malloc)(rt_size_t size);
+typedef void    (*rt_free)(void* ptr);
+typedef void    (*rt_exit)(int code);
+
+#ifndef __RT_FILE_TYPE__
+#define __RT_FILE_TYPE__
+typedef void* rt_file_t;
+#endif
+extern rt_file_t rt_stdin;
+extern rt_file_t rt_stdout;
+extern rt_file_t rt_stderr;
+typedef rt_file_t   (*rt_fopen_t)(const char* file_name, const char* mode);
+typedef int     (*rt_fflush_t)(rt_file_t*file);
+typedef int     (*rt_fclose_t)(rt_file_t file);
+typedef int     (*rt_freads_t)(void * dst_buf, rt_size_t dst_size, rt_size_t elem_size, rt_size_t count, rt_file_t file);
+typedef int     (*rt_fwrite_t)(const void * buf, rt_size_t size, rt_size_t count, rt_file_t file);
+
+typedef int     (*rt_fprintf_t)(void * file, const char *format, ...);
+typedef int     (*rt_snprintf_t)(char * stream, rt_size_t n, const char * format, ...);
+typedef void*   (*rt_realloc_t)(void *memory, rt_size_t new_size);
+
+typedef struct smcc_rt {
+    rt_malloc   _malloc;
+    rt_free     _free;
+    rt_exit     exit;
+    
+    rt_fopen_t    fopen;
+    rt_fflush_t   fflush;
+    rt_fclose_t   fclose;
+    rt_freads_t   freads;
+    rt_fwrite_t   fwrite;
+    
+    // Optional useful runtime
+    rt_fprintf_t  fprintf;
+    rt_snprintf_t snprintf;
+    rt_realloc_t  _realloc;
+} smcc_rt_t;
+
+extern const smcc_rt_t rt;
+
+// #ifndef NULL
+// #ifdef __cplusplus
+// #ifndef _WIN64
+// #define NULL 0
+// #else
+// #define NULL 0LL
+// #endif  /* W64 */
+// #else
+// #define NULL ((void *)0)
+// #endif
+// #endif
+
+#define NULL ((void *)0)
+
+#endif

lib/rt/std/rt_std.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "rt_api_def.h"
+
+const smcc_rt_t rt = {
+    ._malloc = (rt_malloc)malloc,
+    ._free = (rt_free)free,
+    .exit = (rt_exit)exit,
+
+    .fopen =  (rt_fopen_t)fopen,
+    .fflush = (rt_fflush_t)fflush,
+    .fclose = (rt_fclose_t)fclose,
+    .freads = (rt_freads_t)fread_s,
+    .fwrite = (rt_fwrite_t)fwrite,
+
+    ._realloc =  (rt_realloc_t)realloc,
+    .fprintf =  (rt_fprintf_t)fprintf,
+    .snprintf = (rt_snprintf_t)snprintf,
+};
+
+rt_file_t rt_stdin;
+rt_file_t rt_stdout;
+rt_file_t rt_stderr;
+
+void init_rt_std() {
+    rt_stdin = stdin;
+    rt_stdout = stdout;
+    rt_stderr = stderr;
+}

lib/rt/std/rt_std.h

@@ -0,0 +1,6 @@
+#ifndef __SMCC_RT_STD_H__
+#define __SMCC_RT_STD_H__
+
+void init_rt_std();
+
+#endif

lib/rt/std/rt_type.h

@@ -0,0 +1,28 @@
+#ifndef __SMCC_RT_TYPE_H__
+#define __SMCC_RT_TYPE_H__
+
+#include <stdint.h>
+
+typedef int8_t      i8_t;
+typedef int16_t     i16_t;
+typedef int32_t     i32_t;
+typedef int64_t     i64_t;
+
+typedef uint8_t     u8_t;
+typedef uint16_t    u16_t;
+typedef uint32_t    u32_t;
+typedef uint64_t    u64_t;
+
+typedef float       f32_t;
+typedef double      f64_t;
+
+typedef intptr_t    iptr_t;
+typedef uintptr_t   uptr_t;
+
+typedef size_t      usz_t;
+typedef ssize_t     isz_t;
+
+// typedef u32_t       uw_t;
+// typedef i32_t       iw_t;
+
+#endif