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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: dk4rec18.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 dk4rec18.c The dk4rec18 module.
*/


#line 74 "dk4rec18.ctr"

#include "dk4rec18.h"
#include "dk4mem.h"
#include "dk4utf8.h"





#line 82 "dk4rec18.ctr"



size_t
dk4recode_size_c32_to_utf8(const dk4_c32_t *src, dk4_er_t *erp)
{
  dk4_er_t		 er;
  unsigned char		 buf[8];
  size_t		 sz;
  size_t		 rd	= 0;
  size_t		 back	= 0;
  dk4_c32_t		 c32	= dkC32(0);

  if (NULL != src) {
    dk4error_init(&er);
    while (dkC32(0) != (c32 = *(src++))) {
      sz = sizeof(buf);
      if (0 != dk4utf8_encode(buf, &sz, c32, &er)) {
        if ((SIZE_MAX - sz) >= back) {
	  back += sz;
	  rd++;
	} else {
	  dk4error_set_simple_error_code(&er, DK4_E_MATH_OVERFLOW);
	}
      }
    }
    if (SIZE_MAX > back) {
      back++;
    } else {
      dk4error_set_simple_error_code(&er, DK4_E_MATH_OVERFLOW);
    }
    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_c32_to_utf8(
  char *dstb, size_t szdstb, const dk4_c32_t *src, dk4_er_t *erp
)
{
  unsigned char	 buf[8];
  size_t	 sz;
  size_t	 rd	=	0;
  size_t	 used	=	0;
  dk4_c32_t	 c32	=	dkC32(0);
  int		 back	=	0;

  if ((NULL != dstb) && (0 < szdstb) && (NULL != src)) {
    back = 1;
    while((dkC32(0) != *src) && (1 == back) && (used < szdstb)) {
      c32 = *(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, 4, rd);
      }
      if (0 != back) { rd++; }
    }
    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;
}