Output library: A wrapper around printf of C Standard Library for logging and clarity.

print.c

/* A wrapper library for printf function.*/
/* At the core: vfprintf instead of printf is used to allow streams and variadic arguments */
/* Print is also extended into helper functions error() warning() notice() info() */

#include <stdio.h>
#include <stdarg.h>

// gcc -Wall -Wextra -Q  print.c && a

// Stream: Error, custom, warning, notice, log, file

// Prototypes
// print(format, variables)
// print(stream, format, variables)
// print(error, "%s", var1,var2)
// print("format")
// print("text")
// print("text")

// print_error()
// print_warning()
// print_notice()
// log() //logarithm? not great.
// log - prints to both stdout stream and a file.

// check if first argument is a stream, if is, then select second argument as format.


void implementation_print(FILE * stream, const char* format, va_list variadic_arguments){
	vfprintf(stream, format, variadic_arguments);	
}

void print(const char* format, ...){
	va_list variadic_arguments;
	va_start(variadic_arguments, format);
	
	implementation_print(stdout, format, variadic_arguments);
	
	va_end(variadic_arguments);
}

void print_error(const char* format, ...){
	va_list variadic_arguments;
	va_start(variadic_arguments, format);
	
	implementation_print(stderr, format, variadic_arguments);
	
	va_end(variadic_arguments);
}


void print_notice(const char* format, ...){
	va_list variadic_arguments;
	va_start(variadic_arguments, format);
	
	implementation_print(stdout, format, variadic_arguments);
	
	va_end(variadic_arguments);
}

void print_warning(const char* format, ...){
	va_list variadic_arguments;
	va_start(variadic_arguments, format);
	
	implementation_print(stdout, format, variadic_arguments);
	
	va_end(variadic_arguments);
}

void implementation_log_this(const char* file, const char* format, va_list variadic_arguments){
	FILE *file_pointer = fopen(file, "a");  
	implementation_print(file_pointer, format, variadic_arguments);
	fclose(file_pointer);
}

void log_this(const char* file, const char* format, ...){
	va_list variadic_arguments;
	va_start(variadic_arguments, format);

	implementation_log_this(file, format, variadic_arguments);
	
	va_end(variadic_arguments);
}

void print_and_log(const char* file, const char* format, ...){
	va_list variadic_arguments;
	va_start(variadic_arguments, format);
	
	implementation_print(stdout, format, variadic_arguments);
	implementation_log_this(file, format, variadic_arguments);
	
	va_end(variadic_arguments);
}



// log already reserved by C language library
// log log_error log_info
// ECHO
// print_and_log()




int main(){
	char * test = "Outhere";
	print("Hellows %s\n", test);
	printf("Hellows %s\n", test);
	fprintf(stdout,"Hellows %s\n", test);
	
	print_notice("notice %s\n", test);
	print_error("error %s\n", test);
	print_warning("warning %s\n", test);
	print_and_log("file.txt", "print and output: %s\n", test);
	log_this(".//file.txt", "only_log output2: %s\n", test);
	return 0;

}