/usr/include/cdd/cddmp_f.h is in libcdd-dev 094g-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/* cddmp.h (cddlib arithmetic operations using gmp)
Copyright: Komei Fukuda 2000, fukuda@ifor.math.ethz.ch
Version 0.94g, March 23, 2012
*/
/* This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef _CDDMP_HF
#define _CDDMP_HF
#endif /* _CDDMP_HF */
/**********************************/
/* MACROS */
/* dependent on mp implementation */
/**********************************/
#if defined ddf_GMPRATIONAL
#include "gmp.h"
#define ddf_ddf_ARITHMETIC "GMP rational"
#define ddf_init(a) mpq_init(a)
#define ddf_clear(a) mpq_clear(a)
#define ddf_set(a, b) mpq_set(a,b)
#define ddf_set_si(a, b) dddf_mpq_set_si(a,b) /* defined in cddgmp.c */
#define ddf_set_si2(a, b, c) mpq_set_si(a,b,c) /* gmp 3.1 or higher */
#define ddf_add(a, b, c) mpq_add(a,b,c)
#define ddf_sub(a, b, c) mpq_sub(a,b,c)
#define ddf_mul(a, b, c) mpq_mul(a,b,c)
#define ddf_div(a, b, c) mpq_div(a,b,c)
#define ddf_neg(a, b) mpq_neg(a,b)
#define ddf_inv(a, b) mpq_inv(a,b)
#define ddf_cmp(a, b) mpq_cmp(a,b)
/* returns pos if a>b, 0 if a=b, negative if a<b */
#define ddf_sgn(a) mpq_sgn(a)
/* returns nonzero if equal. much faster than mpq_cmp. */
#define ddf_get_d(a) mpq_get_d(a)
#elif defined GMPFLOAT
#include "gmp.h"
#define ddf_ddf_ARITHMETIC "GMP float"
#define ddf_init(a) mpf_init(a)
#define ddf_clear(a) mpf_clear(a)
#define ddf_set(a, b) mpf_set(a,b)
#define ddf_set_d(a, b) mpf_set_d(a,b)
#define ddf_set_si(a, b) mpf_set_si(a,b)
#define ddf_set_si2(a, b, c) mpf_set_si(a,b,c) /* gmp 3.1 or higher */
#define ddf_add(a, b, c) mpf_add(a,b,c)
#define ddf_sub(a, b, c) mpf_sub(a,b,c)
#define ddf_mul(a, b, c) mpf_mul(a,b,c)
#define ddf_div(a, b, c) mpf_div(a,b,c)
#define ddf_neg(a, b) mpf_neg(a,b)
#define ddf_inv(a, b) mpf_inv(a,b)
#define ddf_cmp(a, b) mpf_cmp(a,b)
/* returns pos if a>b, 0 if a=b, negative if a<b */
#define ddf_sgn(a) mpf_sgn(a)
#define ddf_get_d(a) mpf_get_d(a)
#else /* built-in C double */
#define ddf_ddf_ARITHMETIC "C double"
#define ddf_ddf_CDOUBLE
#define ddf_init(a) dddf_init(a)
#define ddf_clear(a) dddf_clear(a)
#define ddf_set(a, b) dddf_set(a,b)
#define ddf_set_si(a, b) dddf_set_si(a,b)
#define ddf_set_si2(a, b, c) dddf_set_si2(a,b,c)
#define ddf_set_d(a, b) dddf_set_d(a,b)
#define ddf_add(a, b, c) dddf_add(a,b,c)
#define ddf_sub(a, b, c) dddf_sub(a,b,c)
#define ddf_mul(a, b, c) dddf_mul(a,b,c)
#define ddf_div(a, b, c) dddf_div(a,b,c)
#define ddf_neg(a, b) dddf_neg(a,b)
#define ddf_inv(a, b) dddf_inv(a,b)
#define ddf_cmp(a, b) dddf_cmp(a,b)
/* returns pos if a>b, 0 if a=b, negative if a<b */
#define ddf_sgn(a) dddf_sgn(a)
#define ddf_get_d(a) dddf_get_d(a)
#endif
#if defined ddf_GMPRATIONAL
typedef mpq_t myfloat;
#elif defined GMPFLOAT
typedef mpf_t myfloat;
#else /* built-in C double */
typedef double myfloat[1];
#endif
#if defined(__cplusplus)
extern "C" {
#endif
void dddf_mpq_set_si(myfloat,signed long);
void dddf_init(myfloat);
void dddf_clear(myfloat);
void dddf_set(myfloat,myfloat);
void dddf_set_d(myfloat,double);
void dddf_set_si(myfloat,signed long);
void dddf_set_si2(myfloat,signed long, unsigned long);
void dddf_add(myfloat,myfloat,myfloat);
void dddf_sub(myfloat,myfloat,myfloat);
void dddf_mul(myfloat,myfloat,myfloat);
void dddf_div(myfloat,myfloat,myfloat);
void dddf_neg(myfloat,myfloat);
void dddf_inv(myfloat,myfloat);
int dddf_cmp(myfloat,myfloat);
int dddf_sgn(myfloat);
double dddf_get_d(myfloat);
void dddf_mpq_set_si(myfloat,signed long);
void ddf_set_global_constants(void);
void ddf_free_global_constants(void); /* 094d */
#if defined(__cplusplus)
}
#endif
/* end of cddmp.h */
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