loggamma.h

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#ifndef OAKFIELD_MATH_LOGGAMMA_H
#define OAKFIELD_MATH_LOGGAMMA_H
 
#include <stddef.h>
 
#include "oakfield/field.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef enum SimLogGammaStatus {
    SIM_LOG_GAMMA_STATUS_OK = 0,           
    SIM_LOG_GAMMA_STATUS_SINGULAR,         
    SIM_LOG_GAMMA_STATUS_INVALID_ARGUMENT, 
    SIM_LOG_GAMMA_STATUS_NUMERIC_FAILURE   
} SimLogGammaStatus;
 
#define SIM_LOG_GAMMA_FLAG_USED_REFLECTION 0x1u
 
typedef struct SimLogGammaResult {
    SimComplexDouble value;   
    double abs_error;         
    size_t lanczos_terms;     
    SimLogGammaStatus status; 
    unsigned int flags;       
} SimLogGammaResult;
 
const char *sim_log_gamma_status_string(SimLogGammaStatus status);
 
SimLogGammaResult sim_log_gamma_eval(SimComplexDouble z);
 
SimComplexDouble sim_log_gamma_value(SimComplexDouble z);
 
#ifdef __cplusplus
}
#endif
 
#endif /* OAKFIELD_MATH_LOGGAMMA_H */