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%%	options

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



%%	header

/**	@file
	File name expander.

	CRT on Windows: Optional.
*/

#ifndef DK4DIR08_H_INCLUDED
#include "dk4dir08.h"
#endif

#ifdef __cplusplus
extern "C" {
#endif

/**	Expand a file name.
	@param	pattern	File name pattern, may optionally include
	a directory part.
	@param	erp	Error report, may be NULL.
	@return	Directory structure on success, NULL on error.
	On success the path component in the returned directory structure
	is NULL if the pattern did not contain a directory part.
	
	Error codes:
	- DK4_E_INVALID_ARGUMENTS<br>
	  if path is NULL,
	- DK4_E_NOT_SUPPORTED<br>
	  if no function to traverse directories was found during build
	  process or the function is called on a non-Windows system,
	- DK4_E_MEMORY_ALLOCATION_FAILED<br>
	  if a memory allocation failed,
	- DK4_E_MATH_OVERFLOW<br>
	  if a mathematical overflow occured in a size calculation,
	- DK4_E_BUFFER_TOO_SMALL<br>
	  if one of the involved directory or file names is too long for an
	  internal buffer,
	- DK4_E_OPENDIR_FAILED<br>
	  with errno value in iDetails1 if the attempt to open the directory
	  failed,
	- DK4_E_FINDFIRSTFILE_FAILED<br>
	  with GetLastError() value in lDetails1 if the FindFirstFile()
	  function failed on Windows,
	- DK4_E_SYSTEM<br>
	  if the stat() or lstat() function failed for one of the directory
	  items.
*/
dk4_dir_c8_t *
dk4fne_open_c8(const char *pattern, dk4_er_t *erp);

#ifdef __cplusplus
}
#endif

%%	module


#include "dk4conf.h"

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

#include "dk4fne08.h"
#include "dk4str8.h"
#include "dk4mem.h"



$!trace-include



/**	Constant texts used by the module.
*/
static const char * const dk4fne_c8_kw[] = {
$!string-table
.
..
$!end
};


#if DK4_ON_WINDOWS
static
int
dk4fne_c8_fill_directory(dk4_dir_c8_t *ptr, const char *fn, dk4_er_t *erp)
{
  WIN32_FIND_DATAA		 ffdata;
  char				*nn;
  HANDLE			 ffres;
  int				 back = 0;

  ffres = FindFirstFileA(fn, &ffdata);
  if (INVALID_HANDLE_VALUE != ffres) {
    back = 1;
    do {
      if (0 != dk4str8_cmp(dk4fne_c8_kw[0], ffdata.cFileName)) {
        if (0 != dk4str8_cmp(dk4fne_c8_kw[1], ffdata.cFileName)) {
	  nn = dk4str8_dup(ffdata.cFileName, erp);
	  if (NULL != nn) {
	    if (0 != (FILE_ATTRIBUTE_DIRECTORY & (ffdata.dwFileAttributes))) {
	      if (0 == dk4sto_add(ptr->s_dir, (void *)nn, erp)) {
	        back = 0;
		dk4mem_free(nn);
	      }
	    } else {
	      if (0 == dk4sto_add(ptr->s_file, (void *)nn, erp)) {
	        back = 0;
		dk4mem_free(nn);
	      }
	    }
	  } else {
	    back = 0;
	  }
	}
      }
    } while (FindNextFileA(ffres, &ffdata));
    FindClose(ffres);
  } else {
    /* ERROR: FindFirstFile failed */
    dk4error_set_ldetails(
      erp, DK4_E_FINDFIRSTFILE_FAILED,
      (long)((unsigned long)GetLastError())
    );
  }
  return back;
}
#endif



dk4_dir_c8_t *
dk4fne_open_c8(const char *fn, dk4_er_t *erp)
{
#if DK4_ON_WINDOWS
  dk4_dir_c8_t	*back	= NULL;
  char		*p1	= NULL;
  int		 ok	= 0;
  if (NULL != fn) {

    back = dk4mem_new(dk4_dir_c8_t, 1, erp);
    if (NULL != back) {
      back->path = NULL;
      back->s_dir = NULL;
      back->i_dir = NULL;
      back->s_file = NULL;
      back->i_file = NULL;
      back->path = dk4str8_dup(fn, erp);
      if (NULL != back->path) {
        p1 = dk4str8_rchr(back->path, '\\');
	if (NULL != p1) {
	  *p1 = '\0';
	} else {
	  dk4mem_free(back->path);
	  back->path = NULL;
	}
        back->s_dir = dk4sto_open(erp);
	if (NULL != back->s_dir) {
	  dk4sto_set_comp(back->s_dir, dk4dir_c8_compare, 0);
	  back->i_dir = dk4sto_it_open(back->s_dir, erp);
	  if (NULL != back->i_dir) {
	    back->s_file = dk4sto_open(erp);
	    if (NULL != back->s_file) {
	      dk4sto_set_comp(back->s_file, dk4dir_c8_compare, 0);
	      back->i_file = dk4sto_it_open(back->s_file, erp);
	      if (NULL != back->i_file) {
	        ok = dk4fne_c8_fill_directory(back, fn, erp);
	      }
	    }
	  }
	}
      }
      if (0 == ok) {
        dk4dir_c8_close(back);
	back = NULL;
      }
    }
  } else {
    dk4error_set_simple_error_code(erp, DK4_E_INVALID_ARGUMENTS);
  }
  return back;
#else
  dk4error_set_simple_error_code(erp, DK4_E_NOT_SUPPORTED);
  return 0;
#endif
}