linuxinstall/src/utils.c

#include "utils.h"

#include <stdarg.h>
#include <stdio.h>
#include <time.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>

LogLevel log_level = LOG_LEVEL_WARNING;

void set_log_level(LogLevel level) {
	log_level = level;
}

void log_message(LogLevel level, const char* format, ...) {
	if (level < log_level)
		return;

	va_list args;
	va_start(args, format);

	const char* color;
	const char* level_str;

	// Set the color and level_str based on the log level
	switch (level) {
	case LOG_LEVEL_DEBUG:
		color = "\033[0;90m";
		level_str = "DEBUG";
		break;
	case LOG_LEVEL_WARNING:
		color = "\033[0;33m";
		level_str = "WARNING";
		break;
	case LOG_LEVEL_ERROR:
		color = "\033[0;31m";
		level_str = "ERROR";
		break;
	}

	// Get the current time
	time_t t = time(NULL);
	struct tm* tm_info = localtime(&t);

	// Print the label, message and newline
	fprintf(stderr, "%s[%02d/%02d/%02d %02d:%02d:%02d - %s]\033[m ", color, tm_info->tm_mday, tm_info->tm_mon + 1, (tm_info->tm_year + 1900) % 100, tm_info->tm_hour, tm_info->tm_min, tm_info->tm_sec, level_str);
	vfprintf(stderr, format, args);
	fprintf(stderr, "\n");

	// Flush the output
	fflush(stderr);

	va_end(args);
}

Result format(char** out_string, const char* fmt, ...) {
	*out_string = NULL;

	va_list args;
	va_start(args, fmt);

	// Calculate the length of the formatted string
	size_t length = vsnprintf(NULL, 0, fmt, args) + 1;

	va_end(args);

	if (length <= 0) {
		log_message(LOG_LEVEL_ERROR, "Failed to calculate the length of the formatted string (%s).", strerror(errno));
		return FAILURE;
	}

	// Allocate a buffer for the formatted string
	char* buffer = calloc(length, sizeof(char));
	if (buffer == NULL) {
		log_message(LOG_LEVEL_ERROR, "Failed to allocate memory for the formatted string (%s).", strerror(errno));
		return OUT_OF_MEMORY;
	}

	va_start(args, fmt);

	// Format the string
	vsnprintf(buffer, length, fmt, args);

	va_end(args);

	*out_string = buffer;
	return SUCCESS;
}