Restructure the library layers

src/os/file/file.h

@@ -0,0 +1,56 @@
+// vim:fileencoding=utf-8:foldmethod=marker
+
+#ifndef FILE_H
+#define FILE_H
+
+#include "../../common/aliases/aliases.h"
+#include "../../base/strings/str8/str8.h"
+#include <stdio.h>
+
+#ifdef WAPP_PLATFORM_CPP
+BEGIN_C_LINKAGE
+#endif // !WAPP_PLATFORM_CPP
+
+typedef FILE File;
+
+typedef enum {
+  WAPP_FA_MODE_R,      // Equivalent to r
+  WAPP_FA_MODE_W,      // Equivalent to w
+  WAPP_FA_MODE_A,      // Equivalent to a
+  WAPP_FA_MODE_R_EX,   // Equivalent to r+
+  WAPP_FA_MODE_W_EX,   // Equivalent to w+
+  WAPP_FA_MODE_A_EX,   // Equivalent to a+
+  WAPP_FA_MODE_RB,     // Equivalent to rb
+  WAPP_FA_MODE_WB,     // Equivalent to wb
+  WAPP_FA_MODE_AB,     // Equivalent to ab
+  WAPP_FA_MODE_RB_EX,  // Equivalent to rb+
+  WAPP_FA_MODE_WB_EX,  // Equivalent to wb+
+  WAPP_FA_MODE_AB_EX,  // Equivalent to ab+
+  WAPP_FA_MODE_WX,     // Equivalent to wx
+  WAPP_FA_MODE_WX_EX,  // Equivalent to wx+
+  WAPP_FA_MODE_WBX,    // Equivalent to wbx
+  WAPP_FA_MODE_WBX_EX, // Equivalent to wbx+
+
+  FILE_ACCESS_MODE_COUNT,
+} FileAccessMode;
+
+typedef enum {
+  WAPP_SEEK_START   = SEEK_SET,
+  WAPP_SEEK_CURRENT = SEEK_CUR,
+  WAPP_SEEK_END     = SEEK_END,
+} FileSeekOrigin;
+
+File *wapp_file_open(Str8RO *filename, FileAccessMode mode);
+u64   wapp_file_get_current_position(File *file);
+i32   wapp_file_seek(File *file, u64 offset, FileSeekOrigin origin);
+u64   wapp_file_get_length(File *file);
+u64   wapp_file_read(Array *dst_buf, File *file, u64 item_count);
+u64   wapp_file_write(const Array *src_buf, File *file, u64 item_count);
+i32   wapp_file_flush(File *file);
+i32   wapp_file_close(File *file);
+
+#ifdef WAPP_PLATFORM_CPP
+END_C_LINKAGE
+#endif // !WAPP_PLATFORM_CPP
+
+#endif // !FILE_H