From: Lukas Krickl <lukas@krickl.dev>
Date: Mon, 23 Feb 2026 05:38:23 +0000 (+0100)
Subject: engine: Added basic logging
X-Git-Url: https://git.krickl.dev/?a=commitdiff_plain;ds=inline;p=lrts%2F.git

engine: Added basic logging
---

diff --git a/TODO.md b/TODO.md
index b6dbda7..51a02a4 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,2 +1,18 @@
 # TODO
 
+## Gameplay
+
+## Goals
+
+- Portable
+- Avoid libraries
+- Simple
+- C89 only (if possible should compile with gcc, clang and tcc)
+- Built-in scripting language
+- Built in map editor
+- Built in sprite editor
+- Resource files and assets are git-friendly
+- Isometric map rendering
+- Replays
+- Networking is optional
+- Lockstep networking 
diff --git a/src/lrts.c b/src/lrts.c
index 364fdbc..ff85d87 100644
--- a/src/lrts.c
+++ b/src/lrts.c
@@ -10,7 +10,7 @@ struct lrts_config* lrts_cfg() {
 
 void lrts_help(int argc, char **argv) {
   u_fprintf(u_stderr, "%s\n", argv[0]);
-  u_fprintf(u_stderr, "Usage: %s [-%s] [-c=command]\n\n",
+  u_fprintf(u_stderr, "Usage: %s [-%s] [-c=command] [demo file]\n\n",
          argv[0], LRTS_OPTS);
   LRTS_HELP("h", "display this help and exit");
 	LRTS_HELP("V", "display version info and exit");
diff --git a/src/lrts.h b/src/lrts.h
index d3ee797..b24dc6b 100644
--- a/src/lrts.h
+++ b/src/lrts.h
@@ -26,6 +26,7 @@
 #include "p_pc/u_assert.c"
 #include "p_posix/p_init.c"
 #include "p_posix/p_getopt.c"
+#include "p_pc/u_log.c"
 #else
 #error "No platform is provided"
 #endif
@@ -48,6 +49,7 @@
 #include "n_conn.c"
 #include "u_math.c"
 #include "t_tile.c"
+#include "u_log.c"
 
 #endif
 
diff --git a/src/p_pc/p_pc.h b/src/p_pc/p_pc.h
new file mode 100644
index 0000000..a8bda81
--- /dev/null
+++ b/src/p_pc/p_pc.h
@@ -0,0 +1,6 @@
+#ifndef P_PC_H__
+#define P_PC_H__
+
+int u_vfprintf(U_FILE* stream, const char *fmt, void *args);
+
+#endif
diff --git a/src/p_pc/u_log.c b/src/p_pc/u_log.c
new file mode 100644
index 0000000..48ef2b5
--- /dev/null
+++ b/src/p_pc/u_log.c
@@ -0,0 +1,18 @@
+#include "../u_log.h"
+#include "../u_stdio.h"
+#include "p_pc.h"
+#include <stdarg.h>
+#include <stdio.h>
+
+int u_log(enum u_log_levels level, const char *fmt, ...) {
+	va_list args;
+	int res = 0;
+
+	if (!u_log_should_log(level)) {
+		return 0;
+	}
+	va_start(args, fmt);
+	res = u_fprintf(u_stderr, fmt, args);
+	va_end(args);
+	return res;
+}
diff --git a/src/p_pc/u_stdio.c b/src/p_pc/u_stdio.c
index ea7f489..4b73a30 100644
--- a/src/p_pc/u_stdio.c
+++ b/src/p_pc/u_stdio.c
@@ -6,14 +6,22 @@ void *u_stdin;
 void *u_stdout;
 void *u_stderr;
 
+
+int u_vfprintf(U_FILE* stream, const char *fmt, void *args) {
+		return vfprintf(stream, fmt, args);
+}
+
 int u_fprintf(U_FILE* stream, const char *fmt, ...) {
 		int res = 0;
 		va_list args;
 		
 		va_start(args, fmt);
-		res = vfprintf(stream, fmt, args);
+		u_vfprintf(stream, fmt, args);
 		va_end(args);
 
 		return res;
 }
 
+int u_fputs(const char *s, U_FILE* stream) {
+	return fputs(s, stream);
+}
diff --git a/src/p_r_sdl/p_init.c b/src/p_r_sdl/p_init.c
index d7784e9..fe05c0e 100644
--- a/src/p_r_sdl/p_init.c
+++ b/src/p_r_sdl/p_init.c
@@ -2,27 +2,31 @@
 #include <SDL3/SDL.h>
 #include "p_window.h"
 #include "../u_defs.h"
+#include "../u_log.h"
 
 #include "p_window.c"
 
 int p_render_init(void) {
 	if (!SDL_Init(SDL_INIT_VIDEO)) {
-		u_fprintf(u_stderr, "Failed to init video: %s\n", 
+		u_log(U_LOG_ERR, "Failed to init video: %s\n", 
 				SDL_GetError());
 		exit(-1);
 	}
 
 	p_main_window = SDL_CreateWindow(lrts_cfg()->name, 640, 640, 0);
 	if (p_main_window == LRTS_NULL) {
-		u_fprintf(u_stderr, "Failed to create window: %s\n", SDL_GetError());
+		u_log(U_LOG_ERR, "Failed to create window: %s\n", SDL_GetError());
 		exit(-1);
 	}
 
+	u_log(U_LOG_DEBUG, "Init successful\n");
+
 	return 0;
 }
 
 int p_renderer_finish(void) {
 	SDL_DestroyWindow(p_main_window);
 	SDL_Quit();
+	u_log(U_LOG_DEBUG, "Exiting...\n");
 	return 0;
 }
diff --git a/src/u_log.c b/src/u_log.c
new file mode 100644
index 0000000..47d65ce
--- /dev/null
+++ b/src/u_log.c
@@ -0,0 +1,6 @@
+#include "u_log.h"
+
+lrts_bool u_log_should_log(enum u_log_levels level) {
+	/* TODO: implement log levels */
+	return LRTS_TRUE;
+}
diff --git a/src/u_log.h b/src/u_log.h
new file mode 100644
index 0000000..40dc233
--- /dev/null
+++ b/src/u_log.h
@@ -0,0 +1,26 @@
+#ifndef U_LOG_H__
+#define U_LOG_H__
+
+#include "u_defs.h"
+#include "u_stdio.h"
+
+enum u_log_levels {
+	U_LOG_DEBUG,
+	U_LOG_INF,
+	U_LOG_WARN,
+	U_LOG_ERR,
+	U_LOG_CRIT
+};
+
+/**
+ * Logs a message to the log stream
+ * this is platform specific
+ */
+int u_log(enum u_log_levels level, const char *fmt, ...);
+
+/**
+ * informs the platform if u_log level should be logged
+ */
+lrts_bool u_log_should_log(enum u_log_levels level);
+
+#endif
diff --git a/src/u_stdio.h b/src/u_stdio.h
index ea2369a..88deabd 100644
--- a/src/u_stdio.h
+++ b/src/u_stdio.h
@@ -9,6 +9,7 @@ extern void *u_stdout;
 extern void *u_stderr;
 
 int u_fprintf(U_FILE* stream, const char *fmt, ...);
+int u_fputs(const char *s, U_FILE* stream);
 
 
 #endif