Update error and debug logging methods

src/duskpsp/log/CMakeLists.txt

@@ -0,0 +1,11 @@
+# Copyright (c) 2026 Dominic Masters
+# 
+# This software is released under the MIT License.
+# https://opensource.org/licenses/MIT
+
+# Sources
+
+target_sources(${DUSK_LIBRARY_TARGET_NAME}
+  PUBLIC
+    log.c
+)

src/duskpsp/log/log.c

@@ -0,0 +1,52 @@
+/**
+ * Copyright (c) 2026 Dominic Masters
+ * 
+ * This software is released under the MIT License.
+ * https://opensource.org/licenses/MIT
+ */
+
+#include "log/log.h"
+
+void logDebug(const char_t *message, ...) {
+  va_list args;
+  va_start(args, message);
+
+  // print to stdout
+  va_list copy;
+  va_copy(copy, args);
+  vprintf(message, copy);
+  va_end(copy);
+
+  // print to file
+  FILE *file = fopen("ms0:/PSP/GAME/Dusk/debug.log", "a");
+  if (file) {
+      va_copy(copy, args);
+      vfprintf(file, message, copy);
+      va_end(copy);
+      fclose(file);
+  }
+
+  va_end(args);
+}
+
+void logError(const char_t *message, ...) {
+  va_list args;
+  va_start(args, message);
+
+  // print to stderr
+  va_list copy;
+  va_copy(copy, args);
+  vfprintf(stderr, message, copy);
+  va_end(copy);
+
+  // print to file
+  FILE *file = fopen("ms0:/PSP/GAME/Dusk/error.log", "a");
+  if (file) {
+      va_copy(copy, args);
+      vfprintf(file, message, copy);
+      va_end(copy);
+      fclose(file);
+  }
+
+  va_end(args);
+}