Implement direct.h functions

lib/xboxrt/Makefile

@@ -1,5 +1,6 @@
 XBOXRT_SRCS := \
 	$(NXDK_DIR)/lib/xboxrt/libc_extensions/stat.c \
+	$(NXDK_DIR)/lib/xboxrt/libc_extensions/direct.c \
 	$(NXDK_DIR)/lib/xboxrt/libc_extensions/strings.c \
 	$(NXDK_DIR)/lib/xboxrt/libc_extensions/wchar.c \
 	$(NXDK_DIR)/lib/xboxrt/libc_extensions/wchar_ext_.c \

lib/xboxrt/libc_extensions/direct.c

@@ -0,0 +1,110 @@
+// SPDX-License-Identifier: MIT
+
+// SPDX-FileCopyrightText: 2023 ExoSkye
+
+// Part of Microsoft CRT
+
+#include <errno.h>
+#include <string.h>
+#include <stdbool.h>
+#include <windows.h>
+#include <assert.h>
+#include <hal/debug.h>
+
+// Made referencing https://www.digitalmars.com/rtl/direct.html, retrieved 2023-06-10, copyrighted 1999-2018 by Digital Mars
+
+// Only call this function in the case there actually is an error
+static int convert_error(DWORD winerror)
+{
+    switch (winerror) {
+        case ERROR_FILE_NOT_FOUND:
+        case ERROR_PATH_NOT_FOUND:
+        case ERROR_FILENAME_EXCED_RANGE:
+        case ERROR_BAD_PATHNAME:
+            return ENOENT;
+            break;
+        case ERROR_ALREADY_EXISTS:
+        case ERROR_FILE_EXISTS:
+            return EEXIST;
+            break;
+        case ERROR_NOT_LOCKED:
+        case ERROR_ACCESS_DENIED:
+            return EACCES;
+            break;
+        case ERROR_INVALID_PARAMETER:
+        case ERROR_INVALID_FUNCTION:
+            return EINVAL;
+            break;
+        case ERROR_NOT_ENOUGH_MEMORY:
+            return ENOMEM;
+            break;
+        case ERROR_DIR_NOT_EMPTY:
+            return ENOTEMPTY;
+            break;
+        default:
+            debugPrint("WARNING: Unknown win32 error code 0x%08lx, returning EINVAL", winerror);
+            return EINVAL;
+    }
+}
+
+/*
+ * TODO: Make a working directory system?
+ */
+
+int _chdir(char* path) {
+    assert(0);
+    return -1; // Unreachable
+}
+
+int _chdrive(int drive) {
+    assert(0);
+    return -1; // Unreachable
+}
+
+char* _getcwd(char* buffer, size_t length) {
+    assert(0);
+    return NULL; // Unreachable
+}
+
+char* _getwd(char* path_name) {
+    assert(0);
+    return NULL; // Unreachable
+}
+
+int _getdrive(void) {
+    assert(0);
+    return -1; // Unreachable
+}
+
+/*
+ * Below are the only things that can work
+ */
+
+int _mkdir(const char* pathname) {
+    BOOL result = CreateDirectoryA(
+            pathname,
+            NULL
+    );
+
+    if (result == true) {
+        return 0;
+    } else {
+        errno = convert_error(GetLastError());
+
+        return -1;
+    }
+}
+
+int _rmdir(const char* pathname) {
+    BOOL result = RemoveDirectoryA(
+            pathname
+    );
+
+    if (result == true) {
+        return 0;
+    } else {
+        errno = convert_error(GetLastError());
+
+        return -1;
+    }
+}

lib/xboxrt/libc_extensions/direct.h

@@ -3,3 +3,11 @@
 // SPDX-FileCopyrightText: 2020 Jannik Vogel
 
 // Part of Microsoft CRT
+
+int _chdir(char* path);
+int _chdrive(int drive);
+char* _getcwd(char* buffer, size_t length);
+char* _getwd(char* path_name);
+int _getdrive(void);
+int _mkdir(const char* pathname);
+int _rmdir(const char* pathname);