qinterp1.h

 
#ifndef QINTERP1_H
#define QINTERP1_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
    #include <stdlib.h>
    #include <stdint.h>
 
    typedef enum {
        QINTERP1_NEXT = 0,               
        QINTERP1_PREVIOUS,               
        QINTERP1_NEAREST,                
        QINTERP1_LINEAR,                 
        QINTERP1_SINE,                   
        QINTERP1_CUBIC,                  
        QINTERP1_HERMITE,                
        QINTERP1_SPLINE,                 
        QINTERP1_CONSTRAINED_SPLINE,     
        QINTERP1_MAX,
    } qInterp1Method_t;
 
 
    typedef struct {
        float (*method)( const float x,
                         const float * const tx,
                         const float * const ty,
                         const size_t tableSize );
        const float *xData;
        const float *yData;
        size_t dataSize;
    } qInterp1_t;
 
    int qInterp1_Setup( qInterp1_t * const i,
                         const float * const xTable,
                         const float * const yTable,
                         const size_t sizeTable );
 
    int qInterp1_SetData( qInterp1_t * const i,
                          const float * const xTable,
                          const float * const yTable,
                          const size_t sizeTable );
 
    int qInterp1_SetMethod( qInterp1_t * const i,
                            const qInterp1Method_t m );
 
 
    float qInterp1_Get( qInterp1_t * const i,
                        const float x );
 
#ifdef __cplusplus
}
#endif
 
#endif