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-rw-r--r--any_log.h62
-rw-r--r--test.c1
2 files changed, 47 insertions, 16 deletions
diff --git a/any_log.h b/any_log.h
index c3d9f08..2e7d755 100644
--- a/any_log.h
+++ b/any_log.h
@@ -20,6 +20,8 @@
#ifndef ANY_LOG_INCLUDE
#define ANY_LOG_INCLUDE
+#include <stdio.h>
+
// These values represent the decreasing urgency of a log invocation.
//
// panic: indicates a fatal error and using it will result in
@@ -196,6 +198,13 @@ typedef enum {
extern "C" {
#endif
+// All log functions will output to the file stream specified by any_log_stream.
+//
+// You should always set this global to a valid stream (eg in main) before
+// invoking any log macro or function!
+//
+extern FILE *any_log_stream;
+
// All log functions will ignore the message if the level is below the
// threshold specified in any_log_level.
//
@@ -205,6 +214,14 @@ extern "C" {
//
extern any_log_level_t any_log_level;
+// This is a simple utility function that sets both any_log_level and
+// any_log_stream with a single call.
+//
+// Call this function before any use of log_* (for example in main) to
+// correctly initialize the library!
+//
+void any_log_init(FILE *stream, any_log_level_t level);
+
// An array containing the strings corresponding to the log levels.
//
// Can be modified in the implementation by defining the macros ANY_LOG_[level]_STRING.
@@ -277,10 +294,16 @@ void any_log_panic(const char *file, int line, const char *module,
#ifdef ANY_LOG_IMPLEMENT
#include <stdarg.h>
-#include <stdio.h>
#include <stdlib.h>
#include <string.h>
+// For the C standard we can't assign stdout or any other streams here,
+// since they are not constant.
+//
+// Thus it is imperative to set this variable to a valid FILE * before using it!
+//
+FILE *any_log_stream = NULL;
+
// The default value for any_log_level
#ifndef ANY_LOG_LEVEL_DEFAULT
#define ANY_LOG_LEVEL_DEFAULT ANY_LOG_INFO
@@ -288,6 +311,13 @@ void any_log_panic(const char *file, int line, const char *module,
any_log_level_t any_log_level = ANY_LOG_LEVEL_DEFAULT;
+// Utility function to initialize the library
+void any_log_init(FILE *stream, any_log_level_t level)
+{
+ any_log_stream = stream;
+ any_log_level = level;
+}
+
// Log level strings
#ifndef ANY_LOG_PANIC_STRING
#define ANY_LOG_PANIC_STRING "panic"
@@ -404,14 +434,14 @@ void any_log_format(any_log_level_t level, const char *module,
if (level > any_log_level)
return;
- fprintf(stdout, ANY_LOG_FORMAT_BEFORE(level, module, func));
+ fprintf(any_log_stream, ANY_LOG_FORMAT_BEFORE(level, module, func));
va_list args;
va_start(args, format);
- vfprintf(stdout, format, args);
+ vfprintf(any_log_stream, format, args);
va_end(args);
- fprintf(stdout, ANY_LOG_FORMAT_AFTER(level, module, func));
+ fprintf(any_log_stream, ANY_LOG_FORMAT_AFTER(level, module, func));
// NOTE: Suppress compiler warning if the user customizes the format string
// and doesn't use these values in it
@@ -480,7 +510,7 @@ void any_log_value(any_log_level_t level, const char *module,
if (level > any_log_level)
return;
- fprintf(stdout, ANY_LOG_VALUE_BEFORE(level, module, func, message));
+ fprintf(any_log_stream, ANY_LOG_VALUE_BEFORE(level, module, func, message));
va_list args;
va_start(args, message);
@@ -494,24 +524,24 @@ void any_log_value(any_log_level_t level, const char *module,
switch (key[-2]) {
case 'd':
case 'i':
- fprintf(stdout, ANY_LOG_VALUE_INT(key, va_arg(args, int)));
+ fprintf(any_log_stream, ANY_LOG_VALUE_INT(key, va_arg(args, int)));
break;
case 'x':
case 'u':
- fprintf(stdout, ANY_LOG_VALUE_HEX(key, va_arg(args, unsigned int)));
+ fprintf(any_log_stream, ANY_LOG_VALUE_HEX(key, va_arg(args, unsigned int)));
break;
case 'p':
- fprintf(stdout, ANY_LOG_VALUE_PTR(key, va_arg(args, void *)));
+ fprintf(any_log_stream, ANY_LOG_VALUE_PTR(key, va_arg(args, void *)));
break;
case 'f':
- fprintf(stdout, ANY_LOG_VALUE_DOUBLE(key, va_arg(args, double)));
+ fprintf(any_log_stream, ANY_LOG_VALUE_DOUBLE(key, va_arg(args, double)));
break;
case 's':
- fprintf(stdout, ANY_LOG_VALUE_STRING(key, va_arg(args, char *)));
+ fprintf(any_log_stream, ANY_LOG_VALUE_STRING(key, va_arg(args, char *)));
break;
default:
@@ -519,18 +549,18 @@ void any_log_value(any_log_level_t level, const char *module,
}
} else {
tdefault:
- fprintf(stdout, ANY_LOG_VALUE_DEFAULT(key, va_arg(args, ANY_LOG_VALUE_DEFAULT_TYPE)));
+ fprintf(any_log_stream, ANY_LOG_VALUE_DEFAULT(key, va_arg(args, ANY_LOG_VALUE_DEFAULT_TYPE)));
}
key = va_arg(args, char *);
if (key == NULL)
break;
- fprintf(stdout, ANY_LOG_VALUE_PAIR_SEP);
+ fprintf(any_log_stream, ANY_LOG_VALUE_PAIR_SEP);
}
va_end(args);
- fprintf(stdout, ANY_LOG_VALUE_AFTER(level, module, func, message));
+ fprintf(any_log_stream, ANY_LOG_VALUE_AFTER(level, module, func, message));
(void)module;
(void)func;
@@ -568,14 +598,14 @@ tdefault:
void any_log_panic(const char *file, int line, const char *module,
const char *func, const char *format, ...)
{
- fprintf(stdout, ANY_LOG_PANIC_BEFORE(file, line, module, func));
+ fprintf(any_log_stream, ANY_LOG_PANIC_BEFORE(file, line, module, func));
va_list args;
va_start(args, format);
- vfprintf(stdout, format, args);
+ vfprintf(any_log_stream, format, args);
va_end(args);
- fprintf(stdout, ANY_LOG_PANIC_AFTER(file, line, module, func));
+ fprintf(any_log_stream, ANY_LOG_PANIC_AFTER(file, line, module, func));
(void)module;
(void)func;
diff --git a/test.c b/test.c
index 6d364ae..d1b8976 100644
--- a/test.c
+++ b/test.c
@@ -15,6 +15,7 @@
int main()
{
+ any_log_init(stdout, ANY_LOG_DEBUG);
// Test any_log_level_to_string
log_trace("ANY_LOG_PANIC = %s", any_log_level_to_string(ANY_LOG_PANIC));
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-19 19:30:09 +0000