sway/common/util.c
M Stoeckl c040defd5f Fix edge case bug in numlen, dropping use of math.h functions
(Specifically, numlen when called with INT_MIN gave an incorrect
result, because abs(INT_MIN) == INT_MIN < 0.)
2019-01-21 12:46:45 -05:00

66 lines
1.4 KiB
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;
}