Start refactor, restructure basic

src/basic/basic_os.h

@@ -0,0 +1,61 @@
+#pragma once
+
+struct FileIter {
+    bool   is_valid;
+    bool   is_directory;
+    String absolute_path;
+    String relative_path;
+    String filename;
+
+    String    path;
+    Allocator allocator;
+    union {
+        struct Win32_FileIter *w32;
+        void                  *dir;
+    };
+};
+
+String   ReadFile(Allocator arena, String path);
+bool     WriteFile(String path, String data);
+String   GetAbsolutePath(Allocator arena, String relative);
+bool     IsValid(const FileIter &it);
+void     Advance(FileIter *it);
+FileIter IterateFiles(Allocator allocator, String path);
+void     InitOS(void (*error_proc)(const char *, ...));
+
+bool DeleteFile(String path);
+String  GetExePath(Allocator allocator);
+String  GetExeDir(Allocator allocator);
+bool    FileExists(String path);
+bool    IsDir(String path);
+bool    IsFile(String path);
+String  GetWorkingDir(Allocator arena);
+bool    IsAbsolute(String path);
+int64_t GetFileModTime(String file);
+
+struct Process {
+    bool is_valid;
+    int  exit_code;
+    char platform[6 * 8];
+    int64_t id;
+
+    int64_t view_id; // text editor view
+    bool    scroll_to_end;
+};
+
+Process SpawnProcess(String command_line, String working_dir, String write_stdin = {}, Array<String> enviroment = {});
+bool    IsValid(Process *process);
+void    KillProcess(Process *process);
+String  PollStdout(Allocator allocator, Process *process, bool force_read);
+void    WriteStdin(Process *process, String string);
+void    CloseStdin(Process *process);
+double GetTimeMicros(void);
+
+enum MakeDirResult {
+    MakeDirResult_Success,
+    MakeDirResult_Exists,
+    MakeDirResult_NotFound,
+    MakeDirResult_ErrorOther,
+};
+
+MakeDirResult MakeDir(String path);