/*
 * The Rin Library – floating point module
 *
 * Copyright (C) 2015 Gediminas Jakutis
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; version 2.1
 * of the License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#ifndef LIBRIN_FLOAT_INCLUDED
#define LIBRIN_FLOAT_INCLUDED

#include <stdint.h>
#include <rin/float_types.h>

/*
 * TODO:
 * · more modes
 */

static const unsigned int RIN_HEXSTRING_DEFAULT =	0x00000000u;
static const unsigned int RIN_HEXSTRING_NOPREFIX =	0x00000001u;

/*
 * All following the functions assume IEEE 754 floating point numbers
 * and thus are only expected to work only on systems which use IEEE 754.
 *
 * The versions suffixed with "d" / double versions are otherwise
 * identical to the float counterparts.
 */

uint32_t rin_signbitf(const float num);
uint64_t rin_signbitd(const double num);

char *rin_float_to_hexstring(const float num, char *str, unsigned int mode);
char *rin_double_to_hexstring(const double num, char *str, unsigned int mode);

unsigned int rin_compare_float(const float a, const float b, uint32_t max_ulps);
unsigned int rin_compare_rin_vec2(const struct rin_vec2 a, const struct rin_vec2 b, uint32_t max_ulps);
unsigned int rin_compare_rin_vec3(const struct rin_vec3 a, const struct rin_vec3 b, uint32_t max_ulps);
unsigned int rin_compare_rin_vec4(const struct rin_vec4 a, const struct rin_vec4 b, uint32_t max_ulps);

unsigned int rin_compare_double(const double a, const double b, uint64_t max_ulps);
unsigned int rin_compare_rin_vec2d(const struct rin_vec2d a, const struct rin_vec2d b, uint64_t max_ulps);
unsigned int rin_compare_rin_vec3d(const struct rin_vec3d a, const struct rin_vec3d b, uint64_t max_ulps);
unsigned int rin_compare_rin_vec4d(const struct rin_vec4d a, const struct rin_vec4d b, uint64_t max_ulps);

uint32_t rin_float_to_uint(const float num);
int32_t rin_float_to_int(const float num);
float rin_uint_to_float(const uint32_t num);
float rin_int_to_float(const int32_t num);

uint64_t rin_double_to_ulong(const double num);
int64_t rin_double_to_long(const double num);
double rin_ulong_to_double(const uint64_t num);
double rin_long_to_double(const int64_t num);

#endif /* LIBRIN_FLOAT_INCLUDED */