util.c

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <stdbool.h>
#include <inttypes.h>

#define grey "989f98"
#define green "a3be8c"
#define yellow "ebcb8b"
#define red "bf616a"

int8_t read_first_line(char *line, uint8_t length, const char *path)
{
	FILE *file = fopen(path, "r");
	if (file == NULL) {
		return 1;
	}

	char ch;
	uint8_t i = 0;
	while ((ch = getc(file)) != '\n' && ch != EOF && i <= length) {
		line[i] = ch;
		i += 1;
	} line[i] = '\0';

	fclose(file);

	return 0;
}

/*
 * Reads the output configuration file. We stop when we reach a whitespace
 * character or the end of the file. It also doubles as a ‘strcmp’
 * implementation, checking for valid configuration.
*/
char read_config_output(FILE *file, char *line, uint8_t length)
{
	char ch;
	bool quote = false;

	uint8_t i;
	for (i = 0; i <= length; i += 1) {
		ch = getc(file);

		if (ch == '\n' || ch == EOF ||
			(ch == ' ' || ch == '\t') && i != 0 && !quote)
		{
			break;
		}

		if (ch == '"')
			quote = !quote;

		line[i] = ch;
	}
	line[i] = '\0';

	return ch;
}

char *read_file(const char *path)
{
	FILE *file = fopen(path, "r");
	if (file == NULL) {
		return NULL;
	}

	char *line = NULL;
	size_t len;

	getline(&line, &len, file);

	fclose(file);

	return line;
}

/* char *formatstr(const char* format, ...) */
/* { */
	/* va_list args; */

	/* va_start(args, format); */
	/* int length = vsnprintf(NULL, 0, format, args); */
	/* va_end(args); */

	/* va_start(args, format); */
	/* char* str = malloc(length + 1); */
	/* vsnprintf(str, length + 1, format, args); */
	/* va_end(args); */

	/* return str; */
/* } */

char *percentage_color(const unsigned int percentage)
{
	if (percentage < 10)
		return grey;
	else if (percentage < 25)
		return ""; // default colour
	else if (percentage < 50)
		return green;
	else if (percentage < 75)
		return yellow;
	return red;
}

char *percentage_color_volume(const unsigned int percentage)
{
	if (percentage == 0)
		return grey; // grey
	else if(percentage <= 100)
		return ""; // default colour
	return red; // red
}