%%	options

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



%%	header

/**	@file
	Simple conversion from char to wchar_t.

	CRT on Windows: Not used.
*/

#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

/**	Recode string from ASCII (0x00 to 0x7F) to wchar_t.
	Use this function only for real ASCII source strings with characters
	in range 0x00 to 0x7F (i.e. to convert numbers, dates, or
	english text).
	@param	dstb	Destination buffer.
	@param	szdstb	Size of destination buffer (number of dkChar).
	@param	src	Source string to convert.
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.
	
	Error codes:
	- DK4_E_INVALID_ARGUMENTS<br>
	  if dstb or src is NULL or szdstb is 0,
	- DK4_E_BUFFER_TOO_SMALL<br>
	  if the dstb buffer is too small.
*/
int
dk4recode_char_to_wchar_t(
  wchar_t *dstb, size_t szdstb, const char *src, dk4_er_t *erp
);

#ifdef __cplusplus
}
#endif


%%	module

#include "dk4rec23.h"
#include "dk4str8.h"

#if DK4_HAVE_STRING_H
#ifndef STRING_H_INCLUDED
#include <string.h>
#define	STRING_H_INCLUDED 1
#endif
#endif



$!trace-include


int
dk4recode_char_to_wchar_t(
  wchar_t *dstb, size_t szdstb, const char *src, dk4_er_t *erp
)
{
  int		 back = 0;
  if ((NULL != dstb) && (NULL != src) && (0 < szdstb)) {
    *dstb = L'\0';
    if (dk4str8_len(src) < szdstb) {
      while ('\0' != *src) {
        *(dstb++) = (wchar_t)((unsigned char)(*(src++)));
      }
      *dstb = L'\0';
      back = 1;
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}