Function liblbfgs_sys::lbfgs

pub unsafe extern "C" fn lbfgs(
    n: c_int, 
    x: *mut lbfgsfloatval_t, 
    ptr_fx: *mut lbfgsfloatval_t, 
    proc_evaluate: lbfgs_evaluate_t, 
    proc_progress: lbfgs_progress_t, 
    instance: *mut c_void, 
    param: *mut lbfgs_parameter_t
) -> c_int

Start a L-BFGS optimization.

@param n The number of variables. @param x The array of variables. A client program can set default values for the optimization and receive the optimization result through this array. This array must be allocated by ::lbfgs_malloc function for libLBFGS built with SSE/SSE2 optimization routine enabled. The library built without SSE/SSE2 optimization does not have such a requirement. @param ptr_fx The pointer to the variable that receives the final value of the objective function for the variables. This argument can be set to \c NULL if the final value of the objective function is unnecessary. @param proc_evaluate The callback function to provide function and gradient evaluations given a current values of variables. A client program must implement a callback function compatible with \ref lbfgs_evaluate_t and pass the pointer to the callback function. @param proc_progress The callback function to receive the progress (the number of iterations, the current value of the objective function) of the minimization process. This argument can be set to \c NULL if a progress report is unnecessary. @param instance A user data for the client program. The callback functions will receive the value of this argument. @param param The pointer to a structure representing parameters for L-BFGS optimization. A client program can set this parameter to \c NULL to use the default parameters. Call lbfgs_parameter_init() function to fill a structure with the default values. @retval int The status code. This function returns zero if the minimization process terminates without an error. A non-zero value indicates an error.