/usr/include/qd/c_dd.h is in libqd-dev 2.3.11.dfsg-2.1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* include/c_dd.h
*
* This work was supported by the Director, Office of Science, Division
* of Mathematical, Information, and Computational Sciences of the
* U.S. Department of Energy under contract number DE-AC03-76SF00098.
*
* Copyright (c) 2000-2001
*
* Contains C wrapper function prototypes for double-double precision
* arithmetic. This can also be used from fortran code.
*/
#ifndef _QD_C_DD_H
#define _QD_C_DD_H
#include <qd/qd_config.h>
#include <qd/fpu.h>
#ifdef __cplusplus
extern "C" {
#endif
/* add */
void c_dd_add(const double *a, const double *b, double *c);
void c_dd_add_d_dd(double a, const double *b, double *c);
void c_dd_add_dd_d(const double *a, double b, double *c);
/* sub */
void c_dd_sub(const double *a, const double *b, double *c);
void c_dd_sub_d_dd(double a, const double *b, double *c);
void c_dd_sub_dd_d(const double *a, double b, double *c);
/* mul */
void c_dd_mul(const double *a, const double *b, double *c);
void c_dd_mul_d_dd(double a, const double *b, double *c);
void c_dd_mul_dd_d(const double *a, double b, double *c);
/* div */
void c_dd_div(const double *a, const double *b, double *c);
void c_dd_div_d_dd(double a, const double *b, double *c);
void c_dd_div_dd_d(const double *a, double b, double *c);
/* copy */
void c_dd_copy(const double *a, double *b);
void c_dd_copy_d(double a, double *b);
void c_dd_sqrt(const double *a, double *b);
void c_dd_sqr(const double *a, double *b);
void c_dd_abs(const double *a, double *b);
void c_dd_npwr(const double *a, int b, double *c);
void c_dd_nroot(const double *a, int b, double *c);
void c_dd_nint(const double *a, double *b);
void c_dd_aint(const double *a, double *b);
void c_dd_floor(const double *a, double *b);
void c_dd_ceil(const double *a, double *b);
void c_dd_exp(const double *a, double *b);
void c_dd_log(const double *a, double *b);
void c_dd_log10(const double *a, double *b);
void c_dd_sin(const double *a, double *b);
void c_dd_cos(const double *a, double *b);
void c_dd_tan(const double *a, double *b);
void c_dd_asin(const double *a, double *b);
void c_dd_acos(const double *a, double *b);
void c_dd_atan(const double *a, double *b);
void c_dd_atan2(const double *a, const double *b, double *c);
void c_dd_sinh(const double *a, double *b);
void c_dd_cosh(const double *a, double *b);
void c_dd_tanh(const double *a, double *b);
void c_dd_asinh(const double *a, double *b);
void c_dd_acosh(const double *a, double *b);
void c_dd_atanh(const double *a, double *b);
void c_dd_sincos(const double *a, double *s, double *c);
void c_dd_sincosh(const double *a, double *s, double *c);
void c_dd_read(const char *s, double *a);
void c_dd_swrite(const double *a, int precision, char *s, int len);
void c_dd_write(const double *a);
void c_dd_neg(const double *a, double *b);
void c_dd_rand(double *a);
void c_dd_comp(const double *a, const double *b, int *result);
void c_dd_comp_dd_d(const double *a, double b, int *result);
void c_dd_comp_d_dd(double a, const double *b, int *result);
void c_dd_pi(double *a);
#ifdef __cplusplus
}
#endif
#endif /* _QD_C_DD_H */
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