ffconf.c 2.75 KB
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/*
 * This file is part of the Micro Python project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2013, 2014 Damien P. George
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

#include <string.h>

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#include "mpconfig.h"
#include "misc.h"
#include "qstr.h"
#include "obj.h"
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#include "ff.h"
#include "ffconf.h"
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#include "fsusermount.h"
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#if _FS_RPATH
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extern BYTE ff_CurrVol;
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#endif

STATIC bool check_path(const TCHAR **path, const char *mount_point_str, mp_uint_t mount_point_len) {
    if (strncmp(*path, mount_point_str, mount_point_len) == 0) {
        if ((*path)[mount_point_len] == '/') {
            *path += mount_point_len;
            return true;
        } else if ((*path)[mount_point_len] == '\0') {
            *path = "/";
            return true;
        }
    }
    return false;
}
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// "path" is the path to lookup; will advance this pointer beyond the volume name.
// Returns logical drive number (-1 means invalid path).
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int ff_get_ldnumber (const TCHAR **path) {
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    if (!(*path)) {
        return -1;
    }

    if (**path != '/') {
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        #if _FS_RPATH
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        return ff_CurrVol;
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        #else
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        return -1;
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        #endif
    }

    if (check_path(path, "/flash", 6)) {
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        return 0;
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    } else if (check_path(path, "/sd", 3)) {
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        return 1;
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    } else if (fs_user_mount != NULL && check_path(path, fs_user_mount->str, fs_user_mount->len)) {
        return 2;
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    } else {
        return -1;
    }
}
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void ff_get_volname(BYTE vol, TCHAR **dest) {
    if (vol == 0) {
        memcpy(*dest, "/flash", 6);
        *dest += 6;
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    } else if (vol == 1) {
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        memcpy(*dest, "/sd", 3);
        *dest += 3;
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    } else {
        memcpy(*dest, fs_user_mount->str, fs_user_mount->len);
        *dest += fs_user_mount->len;
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    }
}