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  if (ctx == NULL || directory == NULL)
58    {
59      errno = EINVAL;
60      return 0;
61    }
62
63  errno = 0;
64  if (*ctx == NULL)
65    {
66      *ctx = (LP_DIR_CTX *)malloc(sizeof(LP_DIR_CTX));
67      if (*ctx == NULL)
68	{
69	  errno = ENOMEM;
70	  return 0;
71	}
72      memset(*ctx, '\0', sizeof(LP_DIR_CTX));
73
74      if (sizeof(TCHAR) != sizeof(char))
75	{
76	  TCHAR *wdir = NULL;
77	  /* len_0 denotes string length *with* trailing 0 */
78	  size_t index = 0,len_0 = strlen(directory) + 1;
79
80	  wdir = (TCHAR *)malloc(len_0 * sizeof(TCHAR));
81	  if (wdir == NULL)
82	    {
83	      free(*ctx);
84	      *ctx = NULL;
85	      errno = ENOMEM;
86	      return 0;
87	    }
88
89#ifdef LP_MULTIBYTE_AVAILABLE
90	  if (!MultiByteToWideChar(CP_ACP, 0, directory, len_0, (WCHAR *)wdir, len_0))
91#endif
92	    for (index = 0; index < len_0; index++)
93	      wdir[index] = (TCHAR)directory[index];
94
95	  (*ctx)->handle = FindFirstFile(wdir, &(*ctx)->ctx);
96
97	  free(wdir);
98	}
99      else
100	(*ctx)->handle = FindFirstFile((TCHAR *)directory, &(*ctx)->ctx);
101
102      if ((*ctx)->handle == INVALID_HANDLE_VALUE)
103	{
104	  free(*ctx);
105	  *ctx = NULL;
106	  errno = EINVAL;
107	  return 0;
108	}
109    }
110  else
111    {
112      if (FindNextFile((*ctx)->handle, &(*ctx)->ctx) == FALSE)
113	{
114	  return 0;
115	}
116    }
117
118  if (sizeof(TCHAR) != sizeof(char))
119    {
120      TCHAR *wdir = (*ctx)->ctx.cFileName;
121      size_t index, len_0 = 0;
122
123      while (wdir[len_0] && len_0 < (sizeof((*ctx)->entry_name) - 1)) len_0++;
124      len_0++;
125
126#ifdef LP_MULTIBYTE_AVAILABLE
127      if (!WideCharToMultiByte(CP_ACP, 0, (WCHAR *)wdir, len_0, (*ctx)->entry_name,
128			       sizeof((*ctx)->entry_name), NULL, 0))
129#endif
130	for (index = 0; index < len_0; index++)
131	  (*ctx)->entry_name[index] = (char)wdir[index];
132    }
133  else
134    strncpy((*ctx)->entry_name, (const char *)(*ctx)->ctx.cFileName,
135	    sizeof((*ctx)->entry_name)-1);
136
137  (*ctx)->entry_name[sizeof((*ctx)->entry_name)-1] = '\0';
138
139  return (*ctx)->entry_name;
140}
141
142int LP_find_file_end(LP_DIR_CTX **ctx)
143{
144  if (ctx != NULL && *ctx != NULL)
145    {
146      FindClose((*ctx)->handle);
147      free(*ctx);
148      *ctx = NULL;
149      return 1;
150    }
151  errno = EINVAL;
152  return 0;
153}
154