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%%	options

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



%%	header

/**	@file
	String output over dk4_stream_t API,
	8 bit character strings.

	CRT on Windows: Not used.
*/

#ifndef	DK4CONF_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4conf.h"
#else
#include <dktools-4/dk4conf.h>
#endif
#endif

#ifndef	DK4STRM_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4strm.h"
#else
#include <dktools-4/dk4strm.h>
#endif
#endif

#ifdef __cplusplus
extern "C" {
#endif

/**	Write 8 bit character string to stream.
	@param	strm	Stream to write to.
	@param	txt	Text to write.
	@param	ie	Input encoding.
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.
	
	Error codes:
	- DK4_E_INVALID_ARGUMENTS<br>
	  if strm is NULL or not opened for writing,
	- DK4_E_SYNTAX<br>
	  if ie does not indicate an 8 bit encoding,
	- DK4_E_DECODING_FAILED<br>
	  if input decoding failed,
	- DK4_E_WRITE_FAILED<br>
	  if writing one ore multiple bytes to the stream failed,
	- DK4_E_FLUSH_FAILED<br>
	  if flusing data downwards failed.
*/
int
dk4stream_c08_puts(dk4_stream_t *strm, const char *txt, int ie, dk4_er_t *erp);

#ifdef __cplusplus
}
#endif

%%	module

#include "dk4conf.h"
#include "dk4strm.h"
#include "dk4strmo08.h"
#include "dk4strmo32.h"
#include "dk4enc.h"
#include "dk4ansi.h"
#include "dk4utf8.h"

#if DK4_HAVE_ASSERT_H
#ifndef	ASSERT_H_INCLUDED
#include <assert.h>
#define	ASSERT_H_INCLUDED 1
#endif
#endif


$!trace-include



int
dk4stream_c08_puts(dk4_stream_t *strm, const char *txt, int ie, dk4_er_t *erp)
{
  dk4_utf8_decoder_t	dec;
  dk4_c32_t	 	c32;
  int		 	back = 0;
  char		 	c;
  unsigned char	 	uc;
#if	DK4_USE_ASSERT
  assert(NULL != strm);
  assert(NULL != txt);
#endif
  if ((NULL != strm) && (NULL != txt)) {
    if (0 != ((strm->fl) & DK4_STREAM_WRITE)) {
      switch (ie) {
        case DK4_ENCODING_PLAIN:
	case DK4_ENCODING_WIN1252:
	case DK4_ENCODING_UTF8:
	{
	  if (strm->oenc == ie) {
	    back = 1;
	    while (('\0' != *txt) && (1 == back)) {
	      if (0 == dk4stream_write_byte(strm, *(txt++), erp)) {
	        back = 0;
	      }
	    }
	  } else {
	    switch (ie) {
	      case DK4_ENCODING_PLAIN: {
	        back = 1;
	        while (('\0' != *txt) && (1 == back)) {
		  c = *(txt++);
		  uc = (unsigned char)c;
		  c32 = (dk4_c32_t)uc;
		  if (0 == dk4stream_c32_putc(strm, c32, erp)) {
		    back = 0;
		  }
		}
	      } break;
	      case DK4_ENCODING_WIN1252: {
	        back = 1;
		while (('\0' != *txt) && (1 == back)) {
		  if (0 != dk4ansi_decode(&c32, (unsigned char)(*(txt++)))) {
		    if (0 == dk4stream_c32_putc(strm, c32, erp)) {
		      back = 0;
		    }
		  } else {
		    back = 0;
		    dk4error_set_simple_error_code(erp, DK4_E_DECODING_FAILED);
		  }
		}
	      } break;
	      case DK4_ENCODING_UTF8: {
	        back = 1;
		dk4utf8_init(&dec);
		while (('\0' != *txt) && (1 == back)) {
		  switch (dk4utf8_add(&dec, (unsigned char)(*(txt++)))) {
		    case DK4_EDSTM_FINISHED: {
		      c32 = dk4utf8_get(&dec);
		      dk4utf8_init(&dec);
		      if (0 == dk4stream_c32_putc(strm, c32, erp)) {
		        back = 0;
		      }
		    } break;
		    case DK4_EDSTM_ERROR: {
		      back = 0;
		      dk4error_set_simple_error_code(erp,DK4_E_DECODING_FAILED);
		    } break;
		  }
		}
		if (0 == dk4utf8_is_empty(&dec)) {
		  back = 0;
		  dk4error_set_simple_error_code(erp, DK4_E_DECODING_FAILED);
		}
	      } break;
	    }
	  }
	} break;
	default: {
	  dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
	} break;
      }
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}