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%%	options

copyright owner	=	Dirk Krause
copyright year	=	2015-xxxx
SPDX-License-Identifier:	BSD-3-Clause



%%	header

/**	@file
	Retrieve dk4_im_t value from
	wchar_t string in hexadecimal notation.
	
	CRT on Windows: Optional, disabling CRT degrades performance.
*/

#ifndef DK4CONF_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4conf.h"
#else
#include <dktools-4/dk4conf.h>
#endif
#endif

#ifndef DK4TYPES_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4types.h"
#else
#include <dktools-4/dk4types.h>
#endif
#endif

#ifndef DK4ERROR_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4error.h"
#else
#include <dktools-4/dk4error.h>
#endif
#endif

#ifdef __cplusplus
extern "C" {
#endif

/**	Retrieve numeric value from string, hexadecimal 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_hex_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 "dk4conf.h"

#if	DK4_HAVE_ASSERT_H
#ifndef	ASSERT_H_INCLUDED
#include <assert.h>
#define	ASSERT_H_INCLUDED 1
#endif
#endif

#include "dk4maiwhdu.h"
#include "dk4maiwhdi.h"
#include "dk4numco.h"
#include "dk4str8.h"


$!trace-include



int
dk4ma_input_wc_hex_dk4_im_t(
  dk4_im_t	 *rp,
  const wchar_t	 *src,
  const wchar_t	**endptr,
  int		  atg,
  dk4_er_t	 *erp
)
{
  dk4_um_t	 res;
  const wchar_t	*ep	=	NULL;
  int		 back	=	0;
  $? "+ dk4ma_input_wc_hex_dk4_im_t \"%ls\" %d", src, atg
#if	DK4_USE_ASSERT
  assert(NULL != rp);
  assert(NULL != src);
#endif
  if ((NULL != rp) && (NULL != src)) {
    if (L'-' == *src) {				$? ". negative"
      if (0 != dk4ma_input_wc_hex_dk4_um_t(&res, ++src, &ep, atg, erp)) {
        if (((dk4_um_t)(DK4_IM_MAX) + (dk4_um_t)1UL) == res) {	$? ". ok min"
	  *rp = DK4_IM_MIN;
	  back = 1;
	} else {
	  if (((dk4_um_t)(DK4_IM_MAX)) >= res) {		$? ". ok neg"
	    *rp = (dk4_im_t)0L - (dk4_im_t)res;
	    back = 1;
	  } else {						$? "! overflow"
	    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	  }
	}
      } else {							$? "! failed"
      }
    } else {					$? ". not negative"
      if (0 != dk4ma_input_wc_hex_dk4_um_t(&res, src, &ep, atg, erp)) {
	*rp = (dk4_im_t)res;
	back = 1;
      } else {							$? "! failed"
      }
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  if (NULL != endptr) { *endptr = ep; }
  $? "- dk4ma_input_wc_hex_dk4_im_t %d", back
  return back;
}