convince/common/util.c

#define _POSIX_C_SOURCE 200809L
#include <float.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include "log.h"
#include "util.h"

int wrap(int i, int max) {
	return ((i % max) + max) % max;
}

int numlen(int n) {
	int j = n <= 0 ? 1 : 0;
	while (n) {
		j++;
		n /= 10;
	}
	return j;
}

uint32_t parse_color(const char *color) {
	if (color[0] == '#') {
		++color;
	}

	int len = strlen(color);
	if (len != 6 && len != 8) {
		sway_log(SWAY_DEBUG, "Invalid color %s, defaulting to color 0xFFFFFFFF", color);
		return 0xFFFFFFFF;
	}
	uint32_t res = (uint32_t)strtoul(color, NULL, 16);
	if (strlen(color) == 6) {
		res = (res << 8) | 0xFF;
	}
	return res;
}

bool parse_boolean(const char *boolean, bool current) {
	if (strcasecmp(boolean, "1") == 0
			|| strcasecmp(boolean, "yes") == 0
			|| strcasecmp(boolean, "on") == 0
			|| strcasecmp(boolean, "true") == 0
			|| strcasecmp(boolean, "enable") == 0
			|| strcasecmp(boolean, "enabled") == 0
			|| strcasecmp(boolean, "active") == 0) {
		return true;
	} else if (strcasecmp(boolean, "toggle") == 0) {
		return !current;
	}
	// All other values are false to match i3
	return false;
}

float parse_float(const char *value) {
	errno = 0;
	char *end;
	float flt = strtof(value, &end);
	if (*end || errno) {
		sway_log(SWAY_DEBUG, "Invalid float value '%s', defaulting to NAN", value);
		return NAN;
	}
	return flt;
}