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/*
Copyright (C) 2015-2020, Dirk Krause
SPDX-License-Identifier: BSD-3-Clause
*/

/*
	WARNING: This file was generated by the dkct program (see
	http://dktools.sourceforge.net/ for details).
	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: dk4loc.ctr
*/

/**	@file dk4loc.c The dk4loc module.
*/


#line 79 "dk4loc.ctr"

#include "dk4conf.h"
#include "dk4loc.h"

#ifndef STDLIB_H_INCLUDED
#include <stdlib.h>
#define	STDLIB_H_INCLUDED 1
#endif

#if DK4_HAVE_STRING_H
#ifndef STRING_H_INCLUDED
#include <string.h>
#define STRING_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_CTYPE_H
#ifndef CTYPE_H_INCLUDED
#include <ctype.h>
#define	CTYPE_H_INCLUDED 1
#endif
#endif

#ifndef DK4ENC_H_INCLUDED
#include "dk4enc.h"
#endif

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

#if DK4_ON_WINDOWS

#ifndef DK4WREG8_H_INCLUDED
#include "dk4wreg8.h"
#endif
#ifndef DK4WREGC_H_INCLUDED
#include "dk4wregc.h"
#endif

#endif

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



#line 129 "dk4loc.ctr"



/**	Keywords used by the module.
*/
static const char * const dk4loc_mod_kw_8[] = {
/* 0 */
"LANG",

/* 1 */
"utf8",

/* 2 */
"UTF-8",

/* 3 */
"Control Panel\\International",

/* 4 */
"LocaleName",

/* 5 */
"sLanguage",

NULL


#line 152 "dk4loc.ctr"
};



static
int
dk4loc_use_default(dkChar *lptr, size_t szl, dk4_er_t *erp)
{
  int		 back = 0;
  if ((NULL != lptr) && (2 < szl)) {
    lptr[0] = dkT('e');
    lptr[1] = dkT('n');
    lptr[2] = dkT('\0');
    back = 1;
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
  }
  return back;
}


int
dk4loc_get_settings(
  dkChar	*lang,
  size_t	 szlang,
  dkChar	*reg,
  size_t	 szreg,
  int		*enc,
  dk4_er_t	*erp
)
{
#if DK4_ON_WINDOWS
  char		 buf[64];	/* Buffer to process getenv result */
  void		*kptr;		/* Registry key pointer */
  dkChar	*pd;		/* Copy string */
  char		*p3;		/* Region */
  char		*p4;		/* Copy string */
  size_t	 sz;		/* String length */
  int		 res;		/* Result from RegQueryValueEx() */
  int		 expand	= 0;	/* Flag: Expansion necessary. */
#else
  char		 buf[64];	/* Buffer to process getenv result */
  dkChar	*pd;		/* Copy string */
  char		*p1;		/* Result from getenv */
  char		*p2;		/* Encoding */
  char		*p3;		/* Region */
  char		*p4;		/* Copy string */
  size_t	 sz;		/* String length */
#endif
  int		 back	=	0;
  

#line 203 "dk4loc.ctr"
#if	DK4_USE_ASSERT
  assert(NULL != lang);
  assert(NULL != reg);
  assert(NULL != enc);
  assert(0 < szlang);
  assert(0 < szreg);
#endif
  if ((NULL != lang) && (0 < szlang)) { *lang = dkT('\0'); }
  if ((NULL != reg ) && (0 < szreg )) { *reg = dkT('\0'); }
  if (NULL != enc) {
#if DK4_ON_WINDOWS
    *enc = DK4_ENCODING_WIN1252;
#else
    *enc = DK4_ENCODING_PLAIN;
#endif
  }
  if ((NULL != lang) && (NULL != reg) && (NULL != enc)) {
    if ((0 < szlang) && (0 < szreg)) {
#if DK4_ON_WINDOWS
#if DK4_CHAR_SIZE > 1
      *enc = DK4_ENCODING_UTF16;
#else
      *enc = DK4_ENCODING_WIN1252;
#endif
      kptr = dk4wreg_open_key_c8(DK4_WREGKEY_HKCU, dk4loc_mod_kw_8[3], 0, erp);
      if (NULL != kptr) {
        res = dk4wreg_get_string_c8(
	  kptr, dk4loc_mod_kw_8[4], buf, sizeof(buf), &expand, erp
	);
	if (0 != res) {
	  p3 = dk4str8_chr(buf, '-');
	  if (NULL != p3) { *(p3++) = '\0'; }
	  dk4str8_normalize(buf, NULL);
	  if (NULL != p3) { dk4str8_normalize(p3, NULL); }
	  sz = dk4str8_len(buf);
	  if (0 < sz) {
	    if (szlang > sz) {
	      /* strcpy(lang, buf); */
	      pd = lang; p4 = buf;
	      while('\0' != *p4) {
		*(pd++) = (dkChar)dk4str8_tolower(*(p4++));
	      }
	      *pd = dkT('\0');
	      back = 1;
	      sz = dk4str8_len(p3);
	      if (0 < sz) {
	        if (szreg > sz) {
		  /* strcpy(reg, p3); */
		  pd = reg; p4 = p3;
		  while('\0' != *p4) {
#if 0
		    *(pd++) = (dkChar)(tolower((unsigned char)(*(p4++))));
#endif
		    *(pd++) = (dkChar)dk4str8_tolower(*(p4++));
		  }
		  *pd = dkT('\0');
		} else {
		  dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
		  back = 0;
		}
	      }
	    } else {
	      dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
	    }
	  } else {
	    back = dk4loc_use_default(lang, szlang, erp);
	  }
	} else {
	  res = dk4wreg_get_string_c8(
	    kptr, dk4loc_mod_kw_8[5], buf, sizeof(buf), &expand, erp
	  );
	  if (0 != res) {
	    dk4str8_normalize(buf, NULL);
	    sz = dk4str8_len(buf);
	    if (2 < sz) { buf[2] = '\0'; }
	    sz = dk4str8_len(buf);
	    if (0 < sz) {
	      if (szlang > sz) {
	        pd = lang; p4 = buf;
		while ('\0' != *p4) {
		  *(pd++) = (dkChar)(tolower((unsigned char)(*(p4++))));
		}
		*pd = dkT('\0');
		back = 1;
	      } else {
	        dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
	      }
	    } else {
	      back = dk4loc_use_default(lang, szlang, erp);
	    }
	  } else {
	    back = dk4loc_use_default(lang, szlang, erp);
	  }
	}
        dk4wreg_close_key(kptr);
      } else {
        back = dk4loc_use_default(lang, szlang, erp);
      }
#else
      p1 = getenv(dk4loc_mod_kw_8[0]);
      if (NULL != p1) {				

#line 304 "dk4loc.ctr"
        if (sizeof(buf) > dk4str8_len(p1)) {		

#line 305 "dk4loc.ctr"
	  dk4str8_cpy_s(buf, sizeof(buf), p1, NULL);
	  p2 = dk4str8_chr(buf, '.');
	  if (NULL != p2) {			

#line 308 "dk4loc.ctr"
	    *(p2++) = '\0';			

#line 309 "dk4loc.ctr"
	  }
	  p3 = dk4str8_chr(buf, '_');
	  if (NULL != p3) {			

#line 312 "dk4loc.ctr"
	    *(p3++) = '\0';			

#line 313 "dk4loc.ctr"
	  }					

#line 314 "dk4loc.ctr"
	  dk4str8_normalize(buf, NULL);		

#line 315 "dk4loc.ctr"
	  if (NULL != p2) { dk4str8_normalize(p2, NULL); }
	  if (NULL != p3) { dk4str8_normalize(p3, NULL); }
	  sz = dk4str8_len(buf);			

#line 318 "dk4loc.ctr"
	  if (0 < sz) {
	    if (szlang > sz) {
	      /* strcpy(lang, buf); */
	      pd = lang; p4 = buf;
	      while('\0' != *p4) {
	        *(pd++) = (dkChar)(tolower((unsigned char)(*(p4++))));
	      }
	      *pd = dkT('\0');
	      back = 1;
	      if (NULL != p3) {
	        sz = dk4str8_len(p3);
	        if (0 < sz) {
		  if (szreg > sz) {
		    /* strcpy(reg, p3); */
		    pd = reg; p4 = p3;
		    while('\0' != *p4) {
		      *(pd++) = (dkChar)(tolower((unsigned char)(*(p4++))));
		    }
		    *pd = dkT('\0');
		  } else {
		    dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
		    back = 0;
		  }
		}
	      }
#if DK4_CHAR_SIZE > 1
#if DK4_CHAR_SIZE > 2
	     

#line 346 "dk4loc.ctr"
	      *enc = DK4_ENCODING_32;
#else
	      

#line 349 "dk4loc.ctr"
	      *enc = DK4_ENCODING_UTF16;
#endif
#else
	      

#line 353 "dk4loc.ctr"
	      *enc = DK4_ENCODING_PLAIN;
	      if (NULL != p2) {
	        if (0 == dk4str8_casecmp(p2, dk4loc_mod_kw_8[1])) {
		  *enc = DK4_ENCODING_UTF8;
		} else {
		  if (0 == dk4str8_casecmp(p2, dk4loc_mod_kw_8[2])) {
		    *enc = DK4_ENCODING_UTF8;
		  }
		}
	      }
#endif
	    } else {				

#line 365 "dk4loc.ctr"
	      dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
	    }
	  } else {				

#line 368 "dk4loc.ctr"
	    back = dk4loc_use_default(lang, szlang, erp);
	  }
	} else {				

#line 371 "dk4loc.ctr"
	  dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
	}
      } else {					

#line 374 "dk4loc.ctr"
        back = dk4loc_use_default(lang, szlang, erp);
      }
#endif
    } else {					

#line 378 "dk4loc.ctr"
      dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
    }
  } else {					

#line 381 "dk4loc.ctr"
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  } 

#line 383 "dk4loc.ctr"
  return back;
}