/*
	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: dk4c8dbl.ctr
*/

/*
Copyright (C) 2016-2017, 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 dk4c8dbl.c The dk4c8dbl module.
*/


#line 99 "dk4c8dbl.ctr"

#include "dk4c8dbl.h"

#if	DK4_HAVE_STRING_H
#include <string.h>
#endif

#if	DK4_HAVE_STDLIB_H
#include <stdlib.h>
#endif

#include "dk4mao8dbl.h"
#include "dk4mai8ddi.h"
#include "dk4str8.h"





#line 117 "dk4c8dbl.ctr"



/**	Write character to stream or file.
	@param	dptr	Destination for write operations.
	@param	dtp		Type of dptr: 0=FILE, 1=dk4_stream_t.
	@param	c		Character to write.
	@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_WRITE_FAILED<br>
	  if writing one ore multiple bytes to the stream failed,
	- DK4_E_FLUSH_FAILED<br>
	  if flusing data downwards failed.
*/
static
int
dk4c8dbl_i_byte_to_void(
	void			*dptr,
	int				 dtp,
	char			 c,
	dk4_er_t		*erp
)
{
	int		 back;
	switch (dtp) {
		case 1: {
			back = dk4stream_write_byte((dk4_stream_t*)dptr, c, erp);
		} break;
		default: {
			if (EOF != fputc(c, (FILE *)dptr)) {
				back = 1;
			}
			else {
				back = 0;
				dk4error_set_simple_error_code(erp, DK4_E_WRITE_FAILED);
			}
		} break;
	}
	return back;
}



static
void
dk4c8dbl_i_cut_trailing_zeroes(char *str)
{
	char	*cutpos	= NULL;
	

#line 170 "dk4c8dbl.ctr"
	while ('\0' != *str) {				

#line 171 "dk4c8dbl.ctr"
		if ('0' == *str) {				

#line 172 "dk4c8dbl.ctr"
			if (NULL == cutpos) {		

#line 173 "dk4c8dbl.ctr"
				cutpos = str;
			}
		}
		else {							

#line 177 "dk4c8dbl.ctr"
			cutpos = NULL;				

#line 178 "dk4c8dbl.ctr"
		}
		str++;
	}
	if (NULL != cutpos) {				

#line 182 "dk4c8dbl.ctr"
		*cutpos = '\0';
	}
	

#line 185 "dk4c8dbl.ctr"
}



/**	Write double value to stream or file, avoid scientific notation.
	@param	dptr	Destination for write operations.
	@param	dtp		Type of dptr: 0=FILE, 1=dk4_stream_t.
	@param	str		String representation of double.
	@param	erp		Error report, may be NULL.
	@return	1 on success, 0 on error.

	Error codes:
	- DK4_E_INVALID_ARGUMENTS<br>
	  if dptr is NULL,
	- DK4_E_BUFFER_TOO_SMALL<br>
	  if the internal destination buffer is too small to store the string,
	- 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.
*/
static
int
dk4c8dbl_i_str_to_void(
	void			*dptr,
	int				 dtp,
	char			*str,
	dk4_er_t		*erp
)
{
	char		*eptr;						/* Position of 'e' */
	char		*ddptr;						/* Position of decimal dot */
	char		*p1;						/* Traverse string */
	const char	*endptr	= NULL;				/* End of processed data exponent */
	dk4_im_t	 expo	= (dk4_im_t)0L;		/* Exponent value */
	size_t		 dotpos;					/* Position of decimal dot */
	int			 isneg	= 0;				/* Flag: Negative number */
	int			 back	= 0;				/* Function result */
	int			 res;						/* Conversion result */
	

#line 225 "dk4c8dbl.ctr"
	/*
		Check for scientific notation
	*/
	eptr = strchr(str, 'e');
	if (NULL == eptr) { eptr = strchr(str, 'E'); }
	if (NULL != eptr) {					

#line 231 "dk4c8dbl.ctr"
		/*
			Scientific notation found, analyse string first
			-----------------------------------------------
		*/
		/*
			Check for negative value (unary minus)
		*/
		if ('-' == *str) {
			isneg = 1;
			str++;
		}
		/*
			Retrieve exponent value
		*/
		*(eptr++) = '\0';
		res = dk4ma_input_c8_dec_dk4_im_t( &expo, eptr, &endptr, 1, erp);
		if (0 == res) {
			expo = (dk4_im_t)0L;
		}
		

#line 251 "dk4c8dbl.ctr"
		/*
			Find position of decimal dot and convert string digit sequence
		*/
		ddptr = strchr(str, '.');
		if (NULL != ddptr) {
			*ddptr = '\0';
			dotpos = strlen(str);
			dk4str8_cpy_to_left(ddptr, &(ddptr[1]));
			dk4c8dbl_i_cut_trailing_zeroes(&(ddptr[1]));
		}
		else {
			dotpos = strlen(str);
		}
		/*
			Calculate real position of decimal dot.
		*/
		expo += (dk4_im_t)dotpos;
		/*
			Remove leading zeroes
		*/
		while (('0' == *str) && ('\0' != str[1])) {
			str++;
			expo--;
		}
		/*
			Now write the number
			--------------------
		*/
		back = 1;
		/*
			Write unary minus for negative numbers
		*/
		if (0 != isneg) {
			if (0 == dk4c8dbl_i_byte_to_void(dptr, dtp, '-', erp)) {
				back = 0;
			}
		}
		if ((dk4_im_t)0L >= expo) {
			/*
				Decimal dot is before first digit in string
			*/
			if (0 == dk4c8dbl_i_byte_to_void(dptr, dtp, '0', erp)) {
				back = 0;
			}
			if (0 == dk4c8dbl_i_byte_to_void(dptr, dtp, '.', erp)) {
				back = 0;
			}
			while ((dk4_im_t)0L > expo++) {
				if (0 == dk4c8dbl_i_byte_to_void(dptr, dtp, '0', erp)) {
					back = 0;
				}
			}
			p1   = str;
			while ('\0' != *p1) {
				if (0 == dk4c8dbl_i_byte_to_void(dptr, dtp, *(p1++), erp)) {
					back = 0;
				}
			}
		}
		else {
			/*
				Decimal dot is in string or after string
			*/
			p1	= str;
			while ('\0' != *p1) {
				if (0 == dk4c8dbl_i_byte_to_void(dptr, dtp, *p1, erp)) {
					back = 0;
				}
				expo--;
				p1++;
				if ((dk4_im_t)0L == expo) {
					if ('\0' != *p1) {
						if (0 == dk4c8dbl_i_byte_to_void(dptr, dtp, '.', erp)) {
							back = 0;
						}
					}
				}
			}
			while ((dk4_im_t)0L < expo--) {
				if (0 == dk4c8dbl_i_byte_to_void(dptr, dtp, '0', erp)) {
					back = 0;
				}
			}
		}
	}
	else {								

#line 337 "dk4c8dbl.ctr"
		/*
			No exponent, can ship out string as is
			--------------------------------------
		*/
		/*
			Remove leading zeroes
		*/
		while (('0' == *str) && ('\0' != str[1])) {
			str++;
		}
		/*
			Remove trailing zeroes
		*/
		ddptr = strchr(str, '.');
		if (NULL != ddptr) {
			ddptr++;
			ddptr++;
			dk4c8dbl_i_cut_trailing_zeroes(ddptr);
			

#line 356 "dk4c8dbl.ctr"
		}
		/*
			Write output
		*/
		back = 1;
		p1   = str;
		if ('.' == *str) {
			if (0 == dk4c8dbl_i_byte_to_void(dptr, dtp, '0', erp)) {
				back = 0;
			}
		}
		while ('\0' != *p1) {
			if (0 == dk4c8dbl_i_byte_to_void(dptr, dtp, *(p1++), erp)) {
				back = 0;
			}
		}
	}
	

#line 374 "dk4c8dbl.ctr"
	return back;
}



/**	Write double value to stream or file, avoid scientific notation.
	@param	dptr	Destination for write operations.
	@param	dtp		Type of dptr: 0=FILE, 1=dk4_stream_t.
	@param	v		Value to write.
	@param	exact	Flag: Exact representation.
	@param	minim	Flag: Minimize an exact representation.
	@param	erp		Error report, may be NULL.
	@return	1 on success, 0 on error.

	Error codes:
	- DK4_E_INVALID_ARGUMENTS<br>
	  if dptr is NULL,
	- DK4_E_BUFFER_TOO_SMALL<br>
	  if the internal destination buffer is too small to store the string,
	- 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.
*/
static
int
dk4c8dbl_i_double_to_void(
	void			*dptr,
	int				 dtp,
	double			 v,
	int				 exact,
	int				 minim,
	dk4_er_t		*erp
)
{
	char	 buf[16*sizeof(double)];
	size_t	 szbuf	= sizeof(buf);
	int		 res	= 0;
	int		 back	= 0;

	if (NULL != dptr) {
		res = dk4ma_write_c8_double(buf, szbuf, v, exact, minim, erp);
		if (0 != res) {
			back = dk4c8dbl_i_str_to_void(dptr, dtp, buf, erp);
		}
	}
	else {
		dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
	}
	return back;
}



int
dk4c8dbl_double_to_stream(
	dk4_stream_t	*strm,
	double			 v,
	int				 exact,
	int				 minim,
	dk4_er_t		*erp
)
{
	return (dk4c8dbl_i_double_to_void((void *)strm, 1, v, exact, minim, erp));
}



int
dk4c8dbl_double_to_file(
	FILE			*fipo,
	double			 v,
	int				 exact,
	int				 minim,
	dk4_er_t		*erp
)
{
	return (dk4c8dbl_i_double_to_void((void *)fipo, 0, v, exact, minim, erp));
}



int
dk4c8dbl_str_double_to_file(
	FILE			*fipo,
	const char		*str,
	dk4_er_t		*erp
)
{
	char	 buf[16*sizeof(double)];
	int		 back	= 0;

	if ((NULL != fipo) && (NULL != str)) {
		if (strlen(str) < sizeof(buf)) {
			strcpy(buf, str);
			back = dk4c8dbl_i_str_to_void((void *)fipo, 0, buf, erp);
		}
		else {
			dk4error_set_simple_error_code(erp, DK4_E_SYNTAX);
		}
	}
	else {
		dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
	}
	return back;
}



/* vim: set ai sw=4 ts=4 : */