aboutsummaryrefslogtreecommitdiffstats
path: root/source/os_specific/service_layers/oswindir.c
blob: 2cdcb945860b5f3de66940036ff10bc7a0b06343 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251

/******************************************************************************
 *
 * Module Name: oswindir - Windows directory access interfaces
 *
 *****************************************************************************/

/*
 * Copyright (C) 2000 - 2012, Intel Corp.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <acpi.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <io.h>

typedef struct ExternalFindInfo
{
    struct _finddata_t          DosInfo;
    char                        *FullWildcardSpec;
    long                        FindHandle;
    char                        State;
    char                        RequestedFileType;

} EXTERNAL_FIND_INFO;


/*******************************************************************************
 *
 * FUNCTION:    AcpiOsOpenDirectory
 *
 * PARAMETERS:  DirPathname         - Full pathname to the directory
 *              WildcardSpec        - string of the form "*.c", etc.
 *              RequestedFileType   - Either a directory or normal file
 *
 * RETURN:      A directory "handle" to be used in subsequent search operations.
 *              NULL returned on failure.
 *
 * DESCRIPTION: Open a directory in preparation for a wildcard search
 *
 ******************************************************************************/

void *
AcpiOsOpenDirectory (
    char                    *DirPathname,
    char                    *WildcardSpec,
    char                    RequestedFileType)
{
    long                    FindHandle;
    char                    *FullWildcardSpec;
    EXTERNAL_FIND_INFO      *SearchInfo;


    /* No directory path means "use current directory" - use a dot */

    if (!DirPathname || strlen (DirPathname) == 0)
    {
        DirPathname = ".";
    }

    /* Allocate the info struct that will be returned to the caller */

    SearchInfo = calloc (sizeof (EXTERNAL_FIND_INFO), 1);
    if (!SearchInfo)
    {
        return (NULL);
    }

    /* Allocate space for the full wildcard path */

    FullWildcardSpec = calloc (strlen (DirPathname) + strlen (WildcardSpec) + 2, 1);
    if (!FullWildcardSpec)
    {
        printf ("Could not allocate buffer for wildcard pathname\n");
        return (NULL);
    }

    /* Create the full wildcard path */

    strcpy (FullWildcardSpec, DirPathname);
    strcat (FullWildcardSpec, "/");
    strcat (FullWildcardSpec, WildcardSpec);

    /* Initialize the find functions, get first match */

    FindHandle = _findfirst (FullWildcardSpec, &SearchInfo->DosInfo);
    if (FindHandle == -1)
    {
        /* Failure means that no match was found */

        free (FullWildcardSpec);
        free (SearchInfo);
        return (NULL);
    }

    /* Save the info in the return structure */

    SearchInfo->RequestedFileType = RequestedFileType;
    SearchInfo->FullWildcardSpec = FullWildcardSpec;
    SearchInfo->FindHandle = FindHandle;
    SearchInfo->State = 0;
    return (SearchInfo);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiOsGetNextFilename
 *
 * PARAMETERS:  DirHandle           - Created via AcpiOsOpenDirectory
 *
 * RETURN:      Next filename matched. NULL if no more matches.
 *
 * DESCRIPTION: Get the next file in the directory that matches the wildcard
 *              specification.
 *
 ******************************************************************************/

char *
AcpiOsGetNextFilename (
    void                    *DirHandle)
{
    EXTERNAL_FIND_INFO      *SearchInfo = DirHandle;
    int                     Status;
    char                    FileTypeNotMatched = 1;


    /*
     * Loop while we have matched files but not found any files of
     * the requested type.
     */
    while (FileTypeNotMatched)
    {
        /* On the first call, we already have the first match */

        if (SearchInfo->State == 0)
        {
            /* No longer the first match */

            SearchInfo->State = 1;
        }
        else
        {
            /* Get the next match */

            Status = _findnext (SearchInfo->FindHandle, &SearchInfo->DosInfo);
            if (Status != 0)
            {
                return (NULL);
            }
        }

        /*
         * Found a match, now check to make sure that the file type
         * matches the requested file type (directory or normal file)
         *
         * NOTE: use of the attrib field saves us from doing a very
         * expensive stat() on the file!
         */
        switch (SearchInfo->RequestedFileType)
        {
        case REQUEST_FILE_ONLY:

            /* Anything other than A_SUBDIR is OK */

            if (!(SearchInfo->DosInfo.attrib & _A_SUBDIR))
            {
                FileTypeNotMatched = 0;
            }
            break;

        case REQUEST_DIR_ONLY:

            /* Must have A_SUBDIR bit set */

            if (SearchInfo->DosInfo.attrib & _A_SUBDIR)
            {
                FileTypeNotMatched = 0;
            }
            break;

        default:
            return (NULL);
        }
    }

    return (SearchInfo->DosInfo.name);
}


/*******************************************************************************
 *
 * FUNCTION:    AcpiOsCloseDirectory
 *
 * PARAMETERS:  DirHandle           - Created via AcpiOsOpenDirectory
 *
 * RETURN:      None
 *
 * DESCRIPTION: Close the open directory and cleanup.
 *
 ******************************************************************************/

void
AcpiOsCloseDirectory (
    void                    *DirHandle)
{
    EXTERNAL_FIND_INFO      *SearchInfo = DirHandle;


    /* Close the directory and free allocations */

    _findclose (SearchInfo->FindHandle);
    free (SearchInfo->FullWildcardSpec);
    free (DirHandle);
}