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%%	options

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



%%	header

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

#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, decimal notation.
	@param	rp	Pointer to result variable for the found value.
	@param	src	String to check for numeric value.
			In addition to the numeric value the string can
			contain a suffix 'K', 'M', 'G', 'T', 'P', 'E',
			'Z' or 'Y' to indicate multiples of powers of 1024
			(kibibytes, mibibytes...).
			Suffixes 'k', 'm', 'g', 't', 'p', 'e', 'z' or 'y'
			indicate multiples of powers of 1000
			(kilobytes, megabytes...).
	@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_size_t(
  size_t	 *rp,
  const wchar_t	 *src,
  const wchar_t	**endptr,
  int		  atg,
  dk4_er_t	 *erp
);


/**	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.
			No suffixes allowed.
	@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_size_t_simple(
  size_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 "dk4maiwddu.h"
#include "dk4maiwdui.h"
#include "dk4maiwdsz.h"
#include "dk4numco.h"
#include "dk4strw.h"



int
dk4ma_input_wc_dec_size_t(
  size_t	 *rp,
  const wchar_t	 *src,
  const wchar_t	**endptr,
  int		  atg,
  dk4_er_t	 *erp
)
{
  const	wchar_t	*myend	=	NULL;
  dk4_um_t	 um	=	(dk4_um_t)0UL;
  size_t	 res	=	0;
  size_t	 xf	=	1024;
  size_t	 factor	=	1;
  size_t	 nloop	=	0;
  int		 back	=	0;
#if	DK4_USE_ASSERT
  assert(NULL != rp);
  assert(NULL != src);
#endif
  if ((NULL != rp) && (NULL != src)) {
    if (0 != dk4ma_input_wc_dec_dk4_um_t(&um, src, &myend, 2, erp)) {
      if (((dk4_um_t)(SIZE_MAX)) >= um) {
        res = (size_t)um;
	if (NULL != myend) {
	  back = 1;
	  if (*myend <= (wchar_t)(0x00FFU)) {
	    switch ((int)(*myend)) {
	      case 'K': { nloop = 1; myend++; } break;
	      case 'M': { nloop = 2; myend++; } break;
	      case 'G': { nloop = 3; myend++; } break;
	      case 'T': { nloop = 4; myend++; } break;
	      case 'P': { nloop = 5; myend++; } break;
	      case 'E': { nloop = 6; myend++; } break;
	      case 'Z': { nloop = 7; myend++; } break;
	      case 'Y': { nloop = 8; myend++; } break;
	      case 'k': { nloop = 1; myend++; xf = 1000; } break;
	      case 'm': { nloop = 2; myend++; xf = 1000; } break;
	      case 'g': { nloop = 3; myend++; xf = 1000; } break;
	      case 't': { nloop = 4; myend++; xf = 1000; } break;
	      case 'p': { nloop = 5; myend++; xf = 1000; } break;
	      case 'e': { nloop = 6; myend++; xf = 1000; } break;
	      case 'z': { nloop = 7; myend++; xf = 1000; } break;
	      case 'y': { nloop = 8; myend++; xf = 1000; } break;
	    }
	  }
	  while (nloop--) {
	    if ((SIZE_MAX / xf) >= factor) {
	      factor *= xf;
	    } else {
	      back = 0;
	      dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	    }
	  }
	  if (0 != back) {
	    if ((SIZE_MAX / factor) >= res) {
	      res *= factor;
	      switch (atg) {
	        case 2: {
		  *rp = res;
		} break;
		case 1: {
		  myend = dk4strw_start(myend, NULL);
		  if (NULL != myend) {
		    back = 0;
		    dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
		  } else {
		    *rp = res;
		  }
		} break;
		default: {
		  back = 0;
		  dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
		} break;
	      }
	    } else {
	      back = 0;
	      dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	    }
	  } else {
	    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
	  }
	} else {
	  *rp = 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 = myend; }
  return back;
}



int
dk4ma_input_wc_dec_size_t_simple(
  size_t	 *rp,
  const wchar_t	 *src,
  const wchar_t	**endptr,
  int		  atg,
  dk4_er_t	 *erp
)
{
  const	wchar_t	*myend	=	NULL;
  dk4_um_t	 um	=	(dk4_um_t)0UL;
  int		 back	=	0;
#if	DK4_USE_ASSERT
  assert(NULL != rp);
  assert(NULL != src);
#endif
  if ((NULL != rp) && (NULL != src)) {
    if (0 != dk4ma_input_wc_dec_dk4_um_t(&um, src, &myend, atg, erp)) {
      if (((dk4_um_t)(SIZE_MAX)) >= um) {
	*rp = (size_t)um;
	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 = myend; }
  return back;
}