[rcore] Add non-va_list custom logging callback

examples/Makefile

@@ -527,6 +527,7 @@ CORE = \
     core/core_clipboard_text \
     core/core_custom_frame_control \
     core/core_custom_logging \
+    core/core_custom_logging2 \
     core/core_delta_time \
     core/core_directory_files \
     core/core_drop_files \

examples/core/core_custom_logging2.c

@@ -0,0 +1,89 @@
+/*******************************************************************************************
+*
+*   raylib [core] example - custom logging 2
+*
+*   Example complexity rating: [★★★☆] 3/4
+*
+*   Example originally created with raylib 5.5, last time updated with raylib 5.5
+*
+*   Example contributed by B. Szilvasy (@eutro) and reviewed by ???
+*
+*   Example licensed under an unmodified zlib/libpng license, which is an OSI-certified,
+*   BSD-like license that allows static linking with closed source software
+*
+*   Copyright (c) 2025 B. Szilvasy (@eutro) and Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include "raylib.h"
+
+#include <stdio.h>                  // Required for: fopen(), fclose(), fputc(), fwrite(), printf(), fprintf(), funopen()
+#include <time.h>                   // Required for: time_t, tm, time(), localtime(), strftime()
+
+// Custom logging function
+void CustomLog(int msgType, const char *text)
+{
+    char timeStr[64] = { 0 };
+    time_t now = time(NULL);
+    struct tm *tm_info = localtime(&now);
+
+    strftime(timeStr, sizeof(timeStr), "%Y-%m-%d %H:%M:%S", tm_info);
+    printf("[%s] ", timeStr);
+
+    switch (msgType)
+    {
+        case LOG_INFO: printf("[INFO] : "); break;
+        case LOG_ERROR: printf("[ERROR]: "); break;
+        case LOG_WARNING: printf("[WARN] : "); break;
+        case LOG_DEBUG: printf("[DEBUG]: "); break;
+        default: break;
+    }
+
+    printf("%s\n", text);
+}
+
+//------------------------------------------------------------------------------------
+// Program main entry point
+//------------------------------------------------------------------------------------
+int main(void)
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    const int screenWidth = 800;
+    const int screenHeight = 450;
+
+    // Set custom logger
+    SetTraceLogCallback2(CustomLog);
+
+    InitWindow(screenWidth, screenHeight, "raylib [core] example - custom logging");
+
+    SetTargetFPS(60);               // Set our game to run at 60 frames-per-second
+    //--------------------------------------------------------------------------------------
+
+    // Main game loop
+    while (!WindowShouldClose())    // Detect window close button or ESC key
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        // TODO: Update your variables here
+        //----------------------------------------------------------------------------------
+
+        // Draw
+        //----------------------------------------------------------------------------------
+        BeginDrawing();
+
+        ClearBackground(RAYWHITE);
+
+        DrawText("Check out the console output to see the custom logger in action!", 60, 200, 20, LIGHTGRAY);
+
+        EndDrawing();
+        //----------------------------------------------------------------------------------
+    }
+
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    CloseWindow();        // Close window and OpenGL context
+    //--------------------------------------------------------------------------------------
+
+    return 0;
+}

src/raylib.h

@@ -951,6 +951,7 @@ typedef enum {
 // Callbacks to hook some internal functions
 // WARNING: These callbacks are intended for advanced users
 typedef void (*TraceLogCallback)(int logLevel, const char *text, va_list args);  // Logging: Redirect trace log messages
+typedef void (*TraceLogCallback2)(int logLevel, const char *text);  // Logging: Redirect trace log messages 2
 typedef unsigned char *(*LoadFileDataCallback)(const char *fileName, int *dataSize);    // FileIO: Load binary data
 typedef bool (*SaveFileDataCallback)(const char *fileName, void *data, int dataSize);   // FileIO: Save binary data
 typedef char *(*LoadFileTextCallback)(const char *fileName);            // FileIO: Load text data
@@ -1111,6 +1112,7 @@ RLAPI void MemFree(void *ptr);                                    // Internal me
 // Set custom callbacks
 // WARNING: Callbacks setup is intended for advanced users
 RLAPI void SetTraceLogCallback(TraceLogCallback callback);          // Set custom trace log
+RLAPI void SetTraceLogCallback2(TraceLogCallback2 callback);        // Set custom trace log 2
 RLAPI void SetLoadFileDataCallback(LoadFileDataCallback callback);  // Set custom file binary data loader
 RLAPI void SetSaveFileDataCallback(SaveFileDataCallback callback);  // Set custom file binary data saver
 RLAPI void SetLoadFileTextCallback(LoadFileTextCallback callback);  // Set custom file text data loader

src/utils.c

@@ -62,6 +62,7 @@
 static int logTypeLevel = LOG_INFO;                 // Minimum log type level
 
 static TraceLogCallback traceLog = NULL;            // TraceLog callback function pointer
+static TraceLogCallback2 traceLog2 = NULL;          // TraceLog callback function pointer 2
 static LoadFileDataCallback loadFileData = NULL;    // LoadFileData callback function pointer
 static SaveFileDataCallback saveFileData = NULL;    // SaveFileText callback function pointer
 static LoadFileTextCallback loadFileText = NULL;    // LoadFileText callback function pointer
@@ -70,7 +71,8 @@ static SaveFileTextCallback saveFileText = NULL;    // SaveFileText callback fun
 //----------------------------------------------------------------------------------
 // Functions to set internal callbacks
 //----------------------------------------------------------------------------------
-void SetTraceLogCallback(TraceLogCallback callback) { traceLog = callback; }              // Set custom trace log
+void SetTraceLogCallback(TraceLogCallback callback) { traceLog = callback; traceLog2 = NULL; } // Set custom trace log
+void SetTraceLogCallback2(TraceLogCallback2 callback) { traceLog2 = callback; traceLog = NULL; } // Set custom trace log
 void SetLoadFileDataCallback(LoadFileDataCallback callback) { loadFileData = callback; }  // Set custom file data loader
 void SetSaveFileDataCallback(SaveFileDataCallback callback) { saveFileData = callback; }  // Set custom file data saver
 void SetLoadFileTextCallback(LoadFileTextCallback callback) { loadFileText = callback; }  // Set custom file text loader
@@ -116,6 +118,21 @@ void TraceLog(int logType, const char *text, ...)
         va_end(args);
         return;
     }
+    else if (traceLog2)
+    {
+        // Does NOT include null terminator.
+        int requiredByteCount = vsnprintf(NULL, 0, text, args);
+        va_end(args);
+        // Error from vsnprintf()
+        if (requiredByteCount < 0) return;
+        char *buffer = RL_CALLOC(requiredByteCount + 1, sizeof(char));
+        va_start(args, text);
+        vsnprintf(buffer, requiredByteCount + 1, text, args);
+        va_end(args);
+        traceLog2(logType, buffer);
+        RL_FREE(buffer);
+        return;
+    }
 
 #if defined(PLATFORM_ANDROID)
     switch (logType)