restrict.h

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/* Some preprocessor magic for having fast inline functions. */
#include <gsl/gsl_matrix.h>

#ifndef INLINE
#define INLINE static inline
#endif
#ifndef INLINE_DECL
#define INLINE_DECL static inline
#endif

/* Some preprocessor magic for the "restrict" keyword:
        http://www.cellperformance.com/mike_acton/2006/05/demystifying_the_restrict_keyw.html */
#if __STDC_VERSION__ >= 199901
#elif defined (__GNUC__) && __GNUC__ >= 2 && __GNUC_MINOR__ >= 91
        #define restrict __restrict__
#else
        #define restrict
#endif

/* Some preprocessor magic for calling this library from C++ */

#ifdef __cplusplus
        #define restrict /* nothing */
#endif