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%%	options

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



%%	header

/**	@file
	Character conversion from ANSI to UNICODE
	and vice versa.

	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

/**	Encode 32 bit character as ANSI character if possible.
	@param	dptr	Pointer to result variable.
	@param	c32	Character to convert.
	@return	1 on success, 0 on error (character c32 out of range).
*/
int
dk4ansi_encode(unsigned char *dptr, dk4_c32_t c32);

/**	Retrieve 32 bit character from ANSI encoded character.
	@param	dptr	Pointer to result variable.
	@param	uc	ANSI character to convert.
	@return 1 on success, 0 on error.
*/
int
dk4ansi_decode(dk4_c32_t *dptr, unsigned char uc);

#ifdef __cplusplus
}
#endif


%%	module

#include "dk4ansi.h"
#include "dk4numco.h"


int
dk4ansi_encode(unsigned char *dptr, dk4_c32_t c32)
{
  int	back	=	0;
  if (NULL != dptr) {
    if ((dk4_c32_t)0x80 > c32) {
      *dptr = (unsigned char)c32;
      back = 1;
    } else {
      if (((dk4_c32_t)0x9F < c32) && ((dk4_c32_t)0x0100 > c32)) {
        *dptr = (unsigned char)c32;
	back = 1;
      } else {
        if ((dk4_c32_t)INT_MAX > c32) {
	  switch ((int)c32) {
            case 0x20AC: { *dptr = (unsigned char)0x80; back = 1; } break;
            case 0x0081: { *dptr = (unsigned char)0x81; back = 1; } break;
            case 0x201A: { *dptr = (unsigned char)0x82; back = 1; } break;
            case 0x0192: { *dptr = (unsigned char)0x83; back = 1; } break;
            case 0x201E: { *dptr = (unsigned char)0x84; back = 1; } break;
            case 0x2026: { *dptr = (unsigned char)0x85; back = 1; } break;
            case 0x2020: { *dptr = (unsigned char)0x86; back = 1; } break;
            case 0x2021: { *dptr = (unsigned char)0x87; back = 1; } break;
            case 0x02C6: { *dptr = (unsigned char)0x88; back = 1; } break;
            case 0x2030: { *dptr = (unsigned char)0x89; back = 1; } break;
            case 0x0160: { *dptr = (unsigned char)0x8A; back = 1; } break;
            case 0x2039: { *dptr = (unsigned char)0x8B; back = 1; } break;
            case 0x0152: { *dptr = (unsigned char)0x8C; back = 1; } break;
            case 0x008D: { *dptr = (unsigned char)0x8D; back = 1; } break;
            case 0x017D: { *dptr = (unsigned char)0x8E; back = 1; } break;
            case 0x008F: { *dptr = (unsigned char)0x8F; back = 1; } break;
            case 0x0090: { *dptr = (unsigned char)0x90; back = 1; } break;
            case 0x2018: { *dptr = (unsigned char)0x91; back = 1; } break;
            case 0x2019: { *dptr = (unsigned char)0x92; back = 1; } break;
            case 0x201C: { *dptr = (unsigned char)0x93; back = 1; } break;
            case 0x201D: { *dptr = (unsigned char)0x94; back = 1; } break;
            case 0x2022: { *dptr = (unsigned char)0x95; back = 1; } break;
            case 0x2013: { *dptr = (unsigned char)0x96; back = 1; } break;
            case 0x2014: { *dptr = (unsigned char)0x97; back = 1; } break;
            case 0x02DC: { *dptr = (unsigned char)0x98; back = 1; } break;
            case 0x2122: { *dptr = (unsigned char)0x99; back = 1; } break;
            case 0x0161: { *dptr = (unsigned char)0x9A; back = 1; } break;
            case 0x203A: { *dptr = (unsigned char)0x9B; back = 1; } break;
            case 0x0153: { *dptr = (unsigned char)0x9C; back = 1; } break;
            case 0x009D: { *dptr = (unsigned char)0x9D; back = 1; } break;
            case 0x017E: { *dptr = (unsigned char)0x9E; back = 1; } break;
            case 0x0178: { *dptr = (unsigned char)0x9F; back = 1; } break;
	  }
	}
      }
    }
  }
  return back;
}



int
dk4ansi_decode(dk4_c32_t *dptr, unsigned char uc)
{
  int	back	=	0;
  if (NULL != dptr) {
    if (0x80 > uc) {
      *dptr = (dk4_c32_t)uc;
      back = 1;
    } else {
      if (0x9F < uc) {
        *dptr = (dk4_c32_t)uc;
	back = 1;
      } else {
        switch ((int)uc) {
	  case 0x80: { *dptr = (dk4_c32_t)0x20AC; back = 1; } break;
	  case 0x81: { *dptr = (dk4_c32_t)0x0081; back = 1; } break;
	  case 0x82: { *dptr = (dk4_c32_t)0x201A; back = 1; } break;
	  case 0x83: { *dptr = (dk4_c32_t)0x0192; back = 1; } break;
	  case 0x84: { *dptr = (dk4_c32_t)0x201E; back = 1; } break;
	  case 0x85: { *dptr = (dk4_c32_t)0x2026; back = 1; } break;
	  case 0x86: { *dptr = (dk4_c32_t)0x2020; back = 1; } break;
	  case 0x87: { *dptr = (dk4_c32_t)0x2021; back = 1; } break;
	  case 0x88: { *dptr = (dk4_c32_t)0x02C6; back = 1; } break;
	  case 0x89: { *dptr = (dk4_c32_t)0x2030; back = 1; } break;
	  case 0x8A: { *dptr = (dk4_c32_t)0x0160; back = 1; } break;
	  case 0x8B: { *dptr = (dk4_c32_t)0x2039; back = 1; } break;
	  case 0x8C: { *dptr = (dk4_c32_t)0x0152; back = 1; } break;
	  case 0x8D: { *dptr = (dk4_c32_t)0x008D; back = 1; } break;
	  case 0x8E: { *dptr = (dk4_c32_t)0x017D; back = 1; } break;
	  case 0x8F: { *dptr = (dk4_c32_t)0x008F; back = 1; } break;
	  case 0x90: { *dptr = (dk4_c32_t)0x0090; back = 1; } break;
	  case 0x91: { *dptr = (dk4_c32_t)0x2018; back = 1; } break;
	  case 0x92: { *dptr = (dk4_c32_t)0x2019; back = 1; } break;
	  case 0x93: { *dptr = (dk4_c32_t)0x201C; back = 1; } break;
	  case 0x94: { *dptr = (dk4_c32_t)0x201D; back = 1; } break;
	  case 0x95: { *dptr = (dk4_c32_t)0x2022; back = 1; } break;
	  case 0x96: { *dptr = (dk4_c32_t)0x2013; back = 1; } break;
	  case 0x97: { *dptr = (dk4_c32_t)0x2014; back = 1; } break;
	  case 0x98: { *dptr = (dk4_c32_t)0x02DC; back = 1; } break;
	  case 0x99: { *dptr = (dk4_c32_t)0x2122; back = 1; } break;
	  case 0x9A: { *dptr = (dk4_c32_t)0x0161; back = 1; } break;
	  case 0x9B: { *dptr = (dk4_c32_t)0x203A; back = 1; } break;
	  case 0x9C: { *dptr = (dk4_c32_t)0x0153; back = 1; } break;
	  case 0x9D: { *dptr = (dk4_c32_t)0x009D; back = 1; } break;
	  case 0x9E: { *dptr = (dk4_c32_t)0x017E; back = 1; } break;
	  case 0x9F: { *dptr = (dk4_c32_t)0x0178; back = 1; } break;
	}
      }
    }
  }
  return back;
}