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%%	options

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



%%	header

/**	@file	dk4getcwd8.h	Get current working directory as char string.
*/

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

#ifdef __cplusplus
extern "C" {
#endif

/**	Find current working directory.
	@param	dptr	Destination buffer pointer.
	@param	sz	Buffer size.
	@param	erp	Error report, may be NULL.
	@return	1 on success, 0 on error.
*/
int
dk4getcwd_c8(char *dptr, size_t sz, dk4_er_t *erp);

#ifdef __cplusplus
}
#endif

%%	module


#include "dk4getcwd8.h"

#if DK4_ON_WINDOWS
#ifndef WINDOWS_H_INCLUDED
#include <windows.h>
#define	WINDOWS_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_UNISTD_H
#ifndef UNISTD_H_INCLUDED
#include <unistd.h>
#define	UNISTD_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_STDLIB_H
#ifndef STDLIB_H_INCLUDED
#include <stdlib.h>
#define	STDLIB_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_DIRECT_H
#ifndef DIRECT_H_INCLUDED
#include <direct.h>
#define DIRECT_H_INCLUDED 1
#endif
#endif

#if DK4_HAVE_ERRNO_H
#ifndef ERRNO_H_INCLUDED
#include <errno.h>
#define	ERRNO_H_INCLUDED 1
#endif
#endif



int
dk4getcwd_c8(char *dptr, size_t sz, dk4_er_t *erp)
{
  int		 back = 0;
  if ((NULL != dptr) && (0 < sz)) { *dptr = '\0'; }
  if ((NULL != dptr) && (0 < sz)) {
#if DK4_ON_WINDOWS
#if DK4_WIN_AVOID_CRT || DK4_WIN_DENY_CRT
    DWORD	dwSz;
    DWORD	dwRes;
    dwSz = (DWORD)sz;
    if ((dk4_um_t)sz > (dk4_um_t)0xFFFFFFUL) { dwSz = (DWORD)0xFFFFFFFFUL; }
    dwRes = GetCurrentDirectoryA(dwSz, dptr);
    if (0 < dwRes) {
      if (dwRes < dwSz) {
        back = 1;
      } else {
        dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
      }
    } else {
      dk4error_set_ldetails(erp, DK4_E_SYSTEM, GetLastError());
    }
#else
#if DK4_HAVE__GETCWD
    int isz;
    errno = 0;
    isz = (int)sz;
    if((dk4_um_t)sz > (dk4_um_t)(INT_MAX)) { isz = INT_MAX; }
    if (NULL != _getcwd(dptr, isz)) {
      back = 1;
    } else {
      dk4error_set_idetails(erp, DK4_E_SYSTEM, errno);
    }
#else
#if DK4_HAVE_GETCWD
    errno = 0;
    if (NULL != getcwd(dptr, sz)) {
      back = 1;
    } else {
      dk4error_set_idetails(erp, DK4_E_SYSTEM, errno);
    }
#else
    DWORD	dwSz;
    DWORD	dwRes;
    dwSz = (DWORD)sz;
    if ((dk4_um_t)sz > (dk4_um_t)0xFFFFFFUL) { dwSz = (DWORD)0xFFFFFFFFUL; }
    dwRes = GetCurrentDirectoryA(dwSz, dptr);
    if (0 < dwRes) {
      if (dwRes < dwSz) {
        back = 1;
      } else {
        dk4error_set_simple_error_code(erp, DK4_E_BUFFER_TOO_SMALL);
      }
    } else {
      dk4error_set_ldetails(erp, DK4_E_SYSTEM, GetLastError());
    }
#endif
#endif
#endif
#else
    errno = 0;
    if (NULL != getcwd(dptr, sz)) {
      back = 1;
    } else {
      dk4error_set_idetails(erp, DK4_E_SYSTEM, errno);
    }
#endif
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
}