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/*
	WARNING: This file was generated by dkct.
	Changes you make here will be lost if dkct is run again!
	You should modify the original source and run dkct on it.
	Original source: dk4rec05.ctr
*/

/*
Copyright (C) 2015-2017, Dirk Krause

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice,
  this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above opyright notice,
  this list of conditions and the following disclaimer in the documentation
  and/or other materials provided with the distribution.
* Neither the name of the author nor the names of contributors may be used
  to endorse or promote products derived from this software without specific
  prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED.
IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

/**	@file dk4rec05.c The dk4rec05 module.
*/


#line 76 "dk4rec05.ctr"

#include "dk4rec05.h"
#include "dk4mem.h"
#include "dk4ansi.h"
#include "dk4utf8.h"



size_t
dk4recode_size_ansi_to_utf8(const char *src, dk4_er_t *erp)
{
  dk4_er_t	 er;		/* Internal error report */
  unsigned char	 buf[8];	/* Current character UTF-8 encoded */
  size_t	 rdb	= 0;	/* Number of bytes read from input */
  size_t	 back	= 0;	/* Function result */
  size_t	 sz;		/* Size of UTF-8 encoded current character */
  dk4_c32_t	 c32;		/* Current 32 bit character */
  unsigned char	 uc;		/* Current source character */

  if (NULL != src) {
    dk4error_init(&er);
    while ('\0' != *src) {
      uc = (unsigned char)(*(src++));
      rdb++;
      if (0 != dk4ansi_decode(&c32, uc)) {
        sz = sizeof(buf);
	if (0 != dk4utf8_encode(buf, &sz, c32, &er)) {
	  if ((SIZE_MAX - sz) < back) {
	    dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW); 
	  }
	  back += sz;
	} else {
	  dk4error_set_elsize_nelem(&er, DK4_E_SYNTAX, 1, rdb);
	}
      } else {
        dk4error_set_elsize_nelem(&er, DK4_E_SYNTAX, 1, rdb);
      }
    }
    if (SIZE_MAX == back) {
      dk4error_set_simple_error_code(erp, DK4_E_MATH_OVERFLOW);
    }
    back++;
    if (DK4_E_NONE != er.ec) {
      back = 0;
      dk4error_copy(erp, &er);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}



int
dk4recode_ansi_to_utf8(
  char *dstb, size_t szdstb, const char *src, dk4_er_t *erp
)
{
  unsigned char	 buf[8];
  size_t	 sz;
  size_t	 used	=	0;
  size_t	 rdb	=	0;
  dk4_c32_t	 c32	=	dkC32(0);
  int		 back	=	0;

  if ((NULL != dstb) && (NULL != src) && (0 < szdstb)) {
    back = 1;
    while (('\0' != *src) && (1 == back) && (used < szdstb)) {
      if (0 != dk4ansi_decode(&c32, (unsigned char)(*(src++)))) {
        sz = sizeof(buf);
	if (0 != dk4utf8_encode(buf, &sz, c32, erp)) {
	  if ((szdstb - used) > sz) {
	    DK4_MEMCPY(&(dstb[used]),buf,sz);
	    used += sz;
	  } else {
	    back = 0;
	    dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
	  }
	} else {
	  back = 0;
	  dk4error_set_elsize_nelem(erp, DK4_E_SYNTAX, 1, rdb);
	}
      } else {
        back = 0;
	dk4error_set_elsize_nelem(erp, DK4_E_SYNTAX, 1, rdb);
      }
      if (0 != back) { rdb++; }
    }
    if (used < szdstb) {
      dstb[used] = '\0';
    } else {
      dstb[szdstb - 1] = '\0';
      back = 0;
      dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}