Add logging

3 files changed, 32 insertions, 1 deletions

diff --git a/examples/.gitignore b/examples/.gitignore
index 0707ee1..dcb0ae9 100644
--- a/examples/.gitignore
+++ b/examples/.gitignore
@@ -5,4 +5,5 @@ array
 slice
 arena
 files
+logging
 
diff --git a/examples/Makefile b/examples/Makefile
index a614627..cd83e92 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -5,7 +5,7 @@ CFLAGS = -Wall -Wextra -std=c99 -fsanitize=address -g -O0
 LDFLAGS =
 
 # Example targets
-EXAMPLES = foreach stringv stringb array slice arena files
+EXAMPLES = foreach stringv stringb array slice arena files logging
 
 # Default target
 all: $(EXAMPLES)
@@ -32,6 +32,9 @@ arena: arena.c
 files: files.c
 	$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
 
+logging: logging.c
+	$(CC) $(CFLAGS) -o $@ $< $(LDFLAGS)
+
 # Run all examples
 run: all
 	@echo "\n=== Running stringv ===\n"
@@ -48,6 +51,8 @@ run: all
 	@./arena
 	@echo "\n=== Running files ===\n"
 	@./files
+	@echo "\n=== Running logging ===\n"
+	@./logging
 
 # Clean build artifacts
 clean:
diff --git a/examples/logging.c b/examples/logging.c
new file mode 100644
index 0000000..1d2744c
--- /dev/null
+++ b/examples/logging.c
@@ -0,0 +1,25 @@
+#define NONSTD_IMPLEMENTATION
+#include "../nonstd.h"
+
+int main(void) {
+    // Default level is LOG_INFO
+    LOG_INFO_MSG("This is an info message: %d", 42);
+    LOG_DEBUG_MSG("This debug message will NOT be shown by default");
+
+    // Change level to LOG_DEBUG
+    set_log_level(LOG_DEBUG);
+    LOG_DEBUG_MSG("Now debug messages are shown: %s", "hello");
+
+    // Warnings and Errors
+    LOG_WARN_MSG("This is a warning!");
+    LOG_ERROR_MSG("This is an error!");
+
+    // Environment variable override test
+    // You can set LOG_LEVEL=1 (WARN) etc.
+    LogLevel env_level = get_log_level_from_env();
+    if (env_level != LOG_DEBUG) {
+        printf("Environment overrides level to: %d\n", env_level);
+    }
+
+    return 0;
+}