path: root/libgamepad_get_relative_axis_by_name.c

/* See LICENSE file for copyright and license details. */
#include "common.h"


int16_t
libgamepad_get_relative_axis_by_name(const char *name)
{
	size_t code;
	int saved_errno;
	char *end;
	if (!name || !*name)
		return -1;
	if (isdigit(*name)) {
	numerical:
		saved_errno = errno;
		errno = 0;
		code = (size_t)strtoul(name, &end, 0);
		if (errno || *end || code > (size_t)REL_MAX) {
			errno = saved_errno;
			return -1;
		}
		errno = saved_errno;
		return (int16_t)code;
	} else {
		if (!strncasecmp(name, "REL_#", 5)) {
			if (isdigit(name[5])) {
				name = &name[5];
				goto numerical;
			}
		}
		for (code = 0; code < ELEMSOF(libgamepad_relative_axis_names__); code++)
			if (!strcasecmp(name, libgamepad_relative_axis_names__[code]))
				return (int16_t)code;
		return -1;
	}
}