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%%	options

copyright owner	=	Dirk Krause
copyright year	=	2015-xxxx
license		=	bsd



%%	header

/**	@file
	Retrieve dk4_im_t value from
	wchar_t string in decimal notation.
*/

#ifndef DK4CONF_H_INCLUDED
#include "dk4conf.h"
#endif

#ifndef DK4TYPES_H_INCLUDED
#include "dk4types.h"
#endif

#ifndef DK4ERROR_H_INCLUDED
#include "dk4error.h"
#endif

#ifdef __cplusplus
extern "C" {
#endif

/**	Retrieve numeric value from string, decimal notation.
	@param	rp	Pointer to result variable for the found value.
	@param	src	String to check for numeric value.
	@param	endptr	Address of pointer variable.
			A pointer to the first character not processed
			is stored here.
			The function may also store a NULL pointer in this
			variable.
			The variable points to the correct error position
			only if er.ec is DK4_E_SYNTAX.
	@param	atg	Allow trailing garbage:
			0=no unprocessable trailing bytes allowed,
			1=trailing whitespaces allowed,
			2=any trailing characters allowed.
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.
	
	Error codes:
	DK4_E_INVALID_ARGUMENTS	if rp or src is NULL,
	DK4_E_MATH_OVERFLOW	if the number is out of range, or
	DK4_E_SYNTAX		if src contains illegal characters.
*/
int
dk4ma_input_wc_dec_dk4_im_t(
  dk4_im_t	 *rp,
  const wchar_t	 *src,
  const wchar_t	**endptr,
  int		  atg,
  dk4_er_t	 *erp
);

#ifdef __cplusplus
}
#endif


%%	module


#include "dk4maiwddi.h"
#include "dk4maiwddu.h"
#include "dk4numco.h"


int
dk4ma_input_wc_dec_dk4_im_t(
  dk4_im_t	 *rp,
  const wchar_t	 *src,
  const wchar_t	**endptr,
  int		  atg,
  dk4_er_t	 *erp
)
{
  const wchar_t	*ep	=	NULL;
  dk4_um_t	 res	=	(dk4_um_t)0UL;
  int		 back	=	0;

  if ((NULL != rp) && (NULL != src)) {
    if (L'-' == *src) {
      if (0 != dk4ma_input_wc_dec_dk4_um_t(&res, ++src, &ep, atg, erp)) {
        if (((dk4_um_t)(DK4_IM_MAX) + (dk4_um_t)1UL) == res) {
	  *rp = DK4_IM_MIN;
	  back = 1;
	} else {
	  if (((dk4_um_t)(DK4_IM_MAX)) >= res) {
	    *rp = (dk4_im_t)0L - (dk4_im_t)res;
	    back = 1;
	  } else {
	    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	  }
	}
      }
    } else {
      if (0 != dk4ma_input_wc_dec_dk4_um_t(&res, src, &ep, atg, erp)) {
        if (((dk4_um_t)(DK4_IM_MAX)) >= res) {
	  *rp = (dk4_im_t)res;
	  back = 1;
	} else {
	  dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	}
      }
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  if (NULL != endptr) { *endptr = ep; }
  return back;
}