1/* $LP: LPlib/source/LPdir_win.c,v 1.10 2004/08/26 13:36:05 _cvs_levitte Exp $ */
2/*
3 * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
18 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
19 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
21 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27#include <windows.h>
28#include <tchar.h>
29#ifndef LPDIR_H
30#include "LPdir.h"
31#endif
32
33/* We're most likely overcautious here, but let's reserve for
34    broken WinCE headers and explicitly opt for UNICODE call.
35    Keep in mind that our WinCE builds are compiled with -DUNICODE
36    [as well as -D_UNICODE]. */
37#if defined(LP_SYS_WINCE) && !defined(FindFirstFile)
38# define FindFirstFile FindFirstFileW
39#endif
40#if defined(LP_SYS_WINCE) && !defined(FindFirstFile)
41# define FindNextFile FindNextFileW
42#endif
43
44#ifndef NAME_MAX
45#define NAME_MAX 255
46#endif
47
48struct LP_dir_context_st
49{
50  WIN32_FIND_DATA ctx;
51  HANDLE handle;
52  char entry_name[NAME_MAX+1];
53};
54
55const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory)
56{
57  struct dirent *direntry = NULL;
58
59  if (ctx == NULL || directory == NULL)
60    {
61      errno = EINVAL;
62      return 0;
63    }
64
65  errno = 0;
66  if (*ctx == NULL)
67    {
68      *ctx = (LP_DIR_CTX *)malloc(sizeof(LP_DIR_CTX));
69      if (*ctx == NULL)
70	{
71	  errno = ENOMEM;
72	  return 0;
73	}
74      memset(*ctx, '\0', sizeof(LP_DIR_CTX));
75
76      if (sizeof(TCHAR) != sizeof(char))
77	{
78	  TCHAR *wdir = NULL;
79	  /* len_0 denotes string length *with* trailing 0 */
80	  size_t index = 0,len_0 = strlen(directory) + 1;
81
82	  wdir = (TCHAR *)malloc(len_0 * sizeof(TCHAR));
83	  if (wdir == NULL)
84	    {
85	      free(*ctx);
86	      *ctx = NULL;
87	      errno = ENOMEM;
88	      return 0;
89	    }
90
91#ifdef LP_MULTIBYTE_AVAILABLE
92	  if (!MultiByteToWideChar(CP_ACP, 0, directory, len_0, (WCHAR *)wdir, len_0))
93#endif
94	    for (index = 0; index < len_0; index++)
95	      wdir[index] = (TCHAR)directory[index];
96
97	  (*ctx)->handle = FindFirstFile(wdir, &(*ctx)->ctx);
98
99	  free(wdir);
100	}
101      else
102	(*ctx)->handle = FindFirstFile((TCHAR *)directory, &(*ctx)->ctx);
103
104      if ((*ctx)->handle == INVALID_HANDLE_VALUE)
105	{
106	  free(*ctx);
107	  *ctx = NULL;
108	  errno = EINVAL;
109	  return 0;
110	}
111    }
112  else
113    {
114      if (FindNextFile((*ctx)->handle, &(*ctx)->ctx) == FALSE)
115	{
116	  return 0;
117	}
118    }
119
120  if (sizeof(TCHAR) != sizeof(char))
121    {
122      TCHAR *wdir = (*ctx)->ctx.cFileName;
123      size_t index, len_0 = 0;
124
125      while (wdir[len_0] && len_0 < (sizeof((*ctx)->entry_name) - 1)) len_0++;
126      len_0++;
127
128#ifdef LP_MULTIBYTE_AVAILABLE
129      if (!WideCharToMultiByte(CP_ACP, 0, (WCHAR *)wdir, len_0, (*ctx)->entry_name,
130			       sizeof((*ctx)->entry_name), NULL, 0))
131#endif
132	for (index = 0; index < len_0; index++)
133	  (*ctx)->entry_name[index] = (char)wdir[index];
134    }
135  else
136    strncpy((*ctx)->entry_name, (const char *)(*ctx)->ctx.cFileName,
137	    sizeof((*ctx)->entry_name)-1);
138
139  (*ctx)->entry_name[sizeof((*ctx)->entry_name)-1] = '\0';
140
141  return (*ctx)->entry_name;
142}
143
144int LP_find_file_end(LP_DIR_CTX **ctx)
145{
146  if (ctx != NULL && *ctx != NULL)
147    {
148      FindClose((*ctx)->handle);
149      free(*ctx);
150      *ctx = NULL;
151      return 1;
152    }
153  errno = EINVAL;
154  return 0;
155}
156