Dead simple logging library based off of a similar library by rxi. Designed to be as minimal and easy-to-use as possible.
The library comes with five functions, all of which take an output FILE* as
their first argument and a printf-style format string with parameters as
following arguments. The functions are identical in all ways except for the
string used as their "log-level".
void log_info (FILE* stream, const char* format, ...);
void log_debug (FILE* stream, const char* format, ...);
void log_warning(FILE* stream, const char* format, ...);
void log_error (FILE* stream, const char* format, ...);
void log_fatal (FILE* stream, const char* format, ...);You can include the log.h and log.c files in a project directly or install
the library locally with make install. Installing locally will add log.h to
your local include path and add liblog.a to your local lib path so that the
library can be linked-to with -llog.
/* example.c */
#include <log.h>
int main(void)
{
int foo = 0;
log_info(stdout, "This is a message created with log_info foo = %d", foo++);
log_debug(stdout, "This is a message created with log_debug foo = %d", foo++);
log_warning(stdout, "This is a message created with log_warning foo = %d", foo++);
log_error(stdout, "This is a message created with log_error foo = %d", foo++);
log_fatal(stdout, "This is a message created with log_fatal foo = %d", foo++);
return 0;
}$ make example
mkdir -p build/
gcc -Wall -Wextra -std=c11 -c -o build/log.o log.c -O3
ar rcs build/liblog.a build/log.o
gcc -Wall -Wextra -std=c11 -o build/example example.c -I. -Lbuild/ -llog
$ ./build/example
2017-10-25 17:45:27 INFO: This is a message created with log_info foo = 0
2017-10-25 17:45:27 DEBUG: This is a message created with log_debug foo = 1
2017-10-25 17:45:27 WARNING: This is a message created with log_warning foo = 2
2017-10-25 17:45:27 ERROR: This is a message created with log_error foo = 3
2017-10-25 17:45:27 FATAL: This is a message created with log_fatal foo = 4The Unlicense
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