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%%	options

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


%%	header

/**	@file
	Convert timestamp to char string, timestamp either given as set
	of components (year, month, day, hour, minute, second), as
	pointer to struct tm or as dk4_time_t value.

	CRT on Windows: Optional.
*/

#ifndef DK4CONF_H_INCLUDED
#include "dk4conf.h"
#endif

#ifndef DK4TYPES_H_INCLUDED
#include "dk4types.h"
#endif

#ifndef DK4ERROR_H_INCLUDED
#include "dk4error.h"
#endif

#ifndef DK4TIME_H_INCLUDED
#include "dk4time.h"
#endif

#ifndef DK4TIMEC_H_INCLUDED
#include "dk4timec.h"
#endif

#ifdef __cplusplus
extern "C" {
#endif

/**	Convert timestamp to char string.
	CRT on Windows: Optional.
	@param	dptr	Destination buffer address.
	@param	dsz	Destination buffer size (number of char).
	@param	format	Output format:
			DK4_TIMEFORMAT_DATE_TIME	for sortable date/time
							combination
							yyyy-mm-dd hh:mm:ss
							(default),
			DK4_TIMEFORMAT_DATE_SORTABLE	for sortable date
							yyyy-mm-dd,
			DK4_TIMEFORMAT_DATE_ENGLISH	for English style date
							mm/dd/yyyy,
			DK4_TIMEFORMAT_DATE_GERMAN	for German style date
							dd.mm.yyyy.
	@param	year	Year.
	@param	month	Month (1 to 12).
	@param	mday	Day within month (1 to 31).
	@param	hour	Hour of day (0 to 23).
	@param	min	Minute within hour (0 to 59).
	@param	sec	Second within minute (0 to 59).
	@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 or dsz is 0,
	- DK4_E_BUFFER_TOO_SMALL<br>
	  if the buffer is too small.

*/
int
dk4time_to_text_c8(
  char			*dptr,
  size_t		 dsz,
  int			 format,
  unsigned short	 year,
  unsigned short	 month,
  unsigned short	 mday,
  unsigned short	 hour,
  unsigned short	 min,
  unsigned short	 sec,
  dk4_er_t		*erp
);

/**	Create text representation for a struct tm.
	CRT on Windows: Required.
	@param	dptr	Destination buffer address.
	@param	dsz	Destination buffer size (number of wchar_t).
	@param	tm	Struct to convert.
	@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 or dsz is 0,
	- DK4_E_BUFFER_TOO_SMALL<br>
	  if the buffer is too small.
*/
int
dk4time_convert_to_text_c8(
  char *dptr, size_t dsz, const struct tm *tm, dk4_er_t *erp
);

/**	Create text representation for timestamp.
	CRT on Windows: Required.
	@param	dptr	Destination buffer address.
	@param	dsz	Destination buffer size.
	@param	timer	Timestamp to convert.
	@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 or dsz is 0,
	- DK4_E_BUG<br>
	  if an internal conversion function fails,
	- DK4_E_BUFFER_TOO_SMALL<br>
	  if the buffer is too small.
*/
int
dk4time_as_text_c8(
  char *dptr, size_t dsz, const dk4_time_t *timer, dk4_er_t *erp
);

#ifdef __cplusplus
}
#endif

%%	module

#include "dk4time08.h"

#ifndef DK4STR8_H_INCLUDED
#include "dk4str8.h"
#endif

#ifndef DK4MAO8D_H_INCLUDED
#include "dk4mao8d.h"
#endif



$!trace-include



/**	Constant text strings used by this module.
*/
static const char * const	dk4time08_kw[] = {
$!string-table
0
-
/
.
 
:
$!end
};



int
dk4time_to_text_c8(
  char			*dptr,
  size_t		 dsz,
  int			 format,
  unsigned short	 year,
  unsigned short	 month,
  unsigned short	 mday,
  unsigned short	 hour,
  unsigned short	 min,
  unsigned short	 sec,
  dk4_er_t		*erp
)
{
  char		 bye[8];
  char		 bmo[8];
  char		 bda[8];
  char		 bho[8];
  char		 bmi[8];
  char		 bse[8];
  int		 res;
  int		 back = 0;
  if ((NULL != dptr) && (0 < dsz)) {
    back = 1;
    res = dk4ma_write_c8_decimal_unsigned(
      bye, sizeof(bye), (dk4_um_t)year, 4, erp
    );
    if (0 == res) { back = 0; }
    res = dk4ma_write_c8_decimal_unsigned(
      bmo, sizeof(bmo), (dk4_um_t)month, 2, erp
    );
    if (0 == res) { back = 0; }
    res = dk4ma_write_c8_decimal_unsigned(
      bda, sizeof(bda), (dk4_um_t)mday, 2, erp
    );
    if (0 == res) { back = 0; }
    if (DK4_TIMEFORMAT_DATE_SORTABLE != format) {
      if (DK4_TIMEFORMAT_DATE_ENGLISH != format) {
        if (DK4_TIMEFORMAT_DATE_GERMAN != format) {
          res = dk4ma_write_c8_decimal_unsigned(
            bho, sizeof(bho), (dk4_um_t)hour, 2, erp
          );
          if (0 == res) { back = 0; }
          res = dk4ma_write_c8_decimal_unsigned(
            bmi, sizeof(bmi), (dk4_um_t)min, 2, erp
          );
          if (0 == res) { back = 0; }
          res = dk4ma_write_c8_decimal_unsigned(
            bse, sizeof(bse), (dk4_um_t)sec, 2, erp
          );
          if (0 == res) { back = 0; }
        }
      }
    }
    if (0 != back) {
      back = 0;
      switch (format) {
	case DK4_TIMEFORMAT_DATE_ENGLISH: {
	  if (0 != dk4str8_cpy_s(dptr, dsz, bmo, erp)) {
	    if (0 != dk4str8_cat_s(dptr, dsz, dk4time08_kw[2], erp)) {
	      if (0 != dk4str8_cat_s(dptr, dsz, bda, erp)) {
	        if (0 != dk4str8_cat_s(dptr, dsz, dk4time08_kw[2], erp)) {
		  if (0 != dk4str8_cat_s(dptr, dsz, bye, erp)) {
		    back = 1;
		  }
		}
	      }
	    }
	  }
	} break;
	case DK4_TIMEFORMAT_DATE_GERMAN: {
	  if (0 != dk4str8_cpy_s(dptr, dsz, bda, erp)) {
	    if (0 != dk4str8_cat_s(dptr, dsz, dk4time08_kw[3], erp)) {
	      if (0 != dk4str8_cat_s(dptr, dsz, bmo, erp)) {
	        if (0 != dk4str8_cat_s(dptr, dsz, dk4time08_kw[3], erp)) {
		  if (0 != dk4str8_cat_s(dptr, dsz, bye, erp)) {
		    back = 1;
		  }
		}
	      }
	    }
	  }
	} break;
	default: {
	  /* yyyy-mm-dd */
	  if (0 != dk4str8_cpy_s(dptr, dsz, bye, erp)) {
	    if (0 != dk4str8_cat_s(dptr, dsz, dk4time08_kw[1], erp)) {
	      if (0 != dk4str8_cat_s(dptr, dsz, bmo, erp)) {
	        if (0 != dk4str8_cat_s(dptr, dsz, dk4time08_kw[1], erp)) {
		  if (0 != dk4str8_cat_s(dptr, dsz, bda, erp)) {
		    back = 1;
		  }
		}
	      }
	    }
	  }
	  if ((0 != back) && (DK4_TIMEFORMAT_DATE_SORTABLE != format)) {
	    back = 0;
	    if (0 != dk4str8_cat_s(dptr, dsz, dk4time08_kw[4], erp)) {
	      if (0 != dk4str8_cat_s(dptr, dsz, bho, erp)) {
	        if (0 != dk4str8_cat_s(dptr, dsz, dk4time08_kw[5], erp)) {
		  if (0 != dk4str8_cat_s(dptr, dsz, bmi, erp)) {
		    if (0 != dk4str8_cat_s(dptr, dsz, dk4time08_kw[5], erp)) {
		      if (0 != dk4str8_cat_s(dptr, dsz, bse, erp)) {
		        back = 1;
		      }
		    }
		  }
		}
	      }
	    }
	  }
	} break;
      }
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}



int
dk4time_convert_to_text_c8(
  char *dptr, size_t dsz, const struct tm *tm, dk4_er_t *erp
)
{
  int		 back = 0;
  if ((NULL != dptr) && (0 < dsz)) {
    *dptr = '\0';
    if (NULL != tm) {
      back = dk4time_to_text_c8(
        dptr, dsz, DK4_TIMEFORMAT_DATE_TIME,
	(1900 + tm->tm_year), (1 + tm->tm_mon), tm->tm_mday,
	tm->tm_hour, tm->tm_min, tm->tm_sec,
	erp
      );
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}



static
int
dk4time_i_as_text_c8(
  char *dptr, size_t dsz, const dk4_time_t *timer, dk4_er_t *erp
)
{
#if DK4_ON_WINDOWS
  /* +++ Windows */
  struct tm	lct;
  int		back = 0;
  if (0 == _localtime64_s(&lct, timer)) {
    back = dk4time_convert_to_text_c8(dptr, dsz, &lct, erp);
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_BUG);
  }
  return back;
  /* --- Windows */
#else
  /* +++ non-Windows */
#if DK4_HAVE_LOCALTIME_R
  struct tm	lct;
  int		back = 0;
  if (NULL != localtime_r(timer, &lct)) {
    back = dk4time_convert_to_text_c8(dptr, dsz, &lct, erp);
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_BUG);
  }
  return back;
#else
  dk4error_set_simple_error_code(erp, DK4_E_NOT_SUPPORTED);
  return 0;
#endif
  /* --- non-Windows */
#endif
}



int
dk4time_as_text_c8(
  char *dptr, size_t dsz, const dk4_time_t *timer, dk4_er_t *erp
)
{
  int		 back = 0;
  if ((NULL != dptr) && (0 < dsz)) {
    *dptr = '\0';
    if (NULL != timer) {
      back = dk4time_i_as_text_c8(dptr, dsz, timer, erp);
    } else {
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}