printer.c

#include "printer.h"

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

#define	START_PAD	"   "

#define	P_ERROR		"E> "
#define	P_WARNING	"W> "
#define	P_INFO		"I> "
#define	P_OUTPUT	"O> "

int write_level = 0;

int
write_raise_level()
{

	return (write_level++);
}

int
write_lower_level()
{

	return (write_level--);
}

int
write_set_level(int level)
{
	int old = write_level;

	write_level = level;

	return (old);
}

int
write_get_level()
{

	return (write_level);
}

void
write_out(int type, const char *format, ...)
{
	FILE *out_stream;
	int i;
	const char *prefix = 0;

	va_list args;

	va_start(args, format);

	switch (type) {
	case PRINT_OUTPUT:
		prefix = P_OUTPUT;
		out_stream = stdout;
		break;
	case PRINT_ERROR:
		prefix = P_ERROR;
		out_stream = stderr;
		break;
	case PRINT_WARNING:
		out_stream = stderr;
		prefix = P_WARNING;
		break;
	case PRINT_INFO:
		out_stream = stderr;
		prefix = P_INFO;
		break;
	default:
		out_stream = stderr;
		prefix = P_INFO;
		break;
	}

	for (i = 0; i < write_level; ++i)
		fprintf(out_stream, START_PAD);

	fprintf(out_stream, "%s", prefix);
	vfprintf(out_stream, format, args);
	fprintf(out_stream, "\n");

	va_end(args);
}