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/* -*- c -*-
* Time-stamp: <2007-06-19 00:20:35 rsmith>
*
* stl2pov/utils.h
* Copyright © 2004--2007 R.F. Smith <rsmith@xs4all.nl>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef UTILS_H
#define UTILS_H
#ifdef __cplusplus
# define BEGIN_C_DECLS extern "C" {
# define END_C_DECLS }
#else /* !__cplusplus */
# define BEGIN_C_DECLS
# define END_C_DECLS
#endif /* __cplusplus */
#include <stdio.h>
BEGIN_C_DECLS
/* Report a fatal error on the standard error stream and terminates the
* program with EXIT_FAILURE. It does not return. */
extern void fatal(const char *fmt, ...);
/* Gives a warning on the standard error stream. */
extern void warning(const char *fmt, ...);
/* Read the contents of a file into a buffer. A kind of poor man's mmap for
* systems that don't have one. */
extern char *ftobuf(const char *name, unsigned *l);
/* Scales the given vector to length 1 */
extern void normalize(float xyz[3]);
/* Calculate the cosine of the angle between to vectors; a.b/(|a||b|) */
extern float cosphi(const float a[3], const float b[3]);
END_C_DECLS
#endif /* UTILS_H */
/* EOF utils.h */
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