Implement direct.h functions

lib/xboxrt/libc_extensions/direct.c

@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: MIT
+
+// SPDX-FileCopyrightText: 2023 ExoSkye
+
+// Part of Microsoft CRT
+
+#include <errno.h>
+#include <string.h>
+#include <stdbool.h>
+#include <windows.h>
+
+// Made referencing https://www.digitalmars.com/rtl/direct.html, retrieved 2023-06-10, copyrighted 1999-2018 by Digital Mars
+
+#define MAXPATH 80
+#define MAXDRIVE 3
+
+/*
+ * These silently succeed, since they wouldn't have any effect on the program at all
+ */
+
+int _chdir(char* path) {
+    return 0;
+}
+
+int _chdrive(int drive) {
+    return 0;
+}
+
+/*
+ * The Xbox has no concept of current working directory, so these can't work
+ */
+
+char* _getcwd(char* buffer, size_t length) {
+    errno = -EINVAL;
+    return NULL;
+}
+
+char* _getwd(char* path_name) {
+    errno = -EINVAL;
+    return NULL;
+}
+
+int _getdrive(void) {
+    errno = -EINVAL;
+    return 0;
+}
+
+/*
+ * There's no path variable on the Xbox, so this can't work
+ */
+
+char* _searchpath(const char* file) {
+    errno = -EINVAL;
+    return NULL;
+}
+
+/*
+ * Below are the only things that can work
+ */
+
+int _mkdir(const char* pathname) {
+    BOOL result = CreateDirectoryA(
+            pathname,
+            NULL
+    );
+
+    if (result == true) {
+        return 0;
+    } else {
+        DWORD err = GetLastError();
+
+        if (err == ERROR_ALREADY_EXISTS) {
+            errno = EACCES;
+        } else if (err == ERROR_PATH_NOT_FOUND) {
+            errno = ENOENT;
+        }
+
+        return -1;
+    }
+}
+
+int _rmdir(const char* pathname) {
+    BOOL result = RemoveDirectoryA(
+            pathname
+    );
+
+    if (result == true) {
+        return 0;
+    } else {
+        DWORD err = GetLastError();
+
+        if (err == ERROR_ALREADY_EXISTS) {
+            errno = EACCES;
+        } else if (err == ERROR_PATH_NOT_FOUND) {
+            errno = ENOENT;
+        }
+
+        return -1;
+    }
+}
+
+void fnmerge(char* path, const char* drive, const char* dir, const char* name, const char* ext) {
+
+}
+
+void fnsplit(const char* path, char* drive, char* dir, char* name, char* ext) {
+
+}

lib/xboxrt/libc_extensions/direct.h

@@ -3,3 +3,13 @@
 // 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);
+void _fnmerge(char* path, const char* drive, const char* dir, const char* name, const char* ext);
+char* _searchpath(const char* file);