| 1 | /*
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| 2 | * Copyright (c) 2010 Lenka Trochtova
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup devman
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | #include <str.h>
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| 34 |
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| 35 | #include "devman.h"
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| 36 |
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| 37 | /** Compute compound score of driver and device.
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| 38 | *
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| 39 | * @param driver Match id of the driver.
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| 40 | * @param device Match id of the device.
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| 41 | * @return Compound score.
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| 42 | * @retval 0 No match at all.
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| 43 | */
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| 44 | static int compute_match_score(match_id_t *driver, match_id_t *device)
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| 45 | {
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| 46 | if (str_cmp(driver->id, device->id) == 0) {
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| 47 | /*
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| 48 | * The strings match, return the product of their scores.
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| 49 | */
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| 50 | return driver->score * device->score;
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| 51 | } else {
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| 52 | /*
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| 53 | * Different strings, return zero.
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| 54 | */
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| 55 | return 0;
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| 56 | }
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| 57 | }
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| 58 |
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| 59 | int get_match_score(driver_t *drv, dev_node_t *dev)
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| 60 | {
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| 61 | link_t *drv_head = &drv->match_ids.ids;
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| 62 | link_t *dev_head = &dev->pfun->match_ids.ids;
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| 63 |
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| 64 | if (list_empty(drv_head) || list_empty(dev_head))
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| 65 | return 0;
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| 66 |
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| 67 | /*
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| 68 | * Go through all pairs, return the highest score obtained.
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| 69 | */
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| 70 | int highest_score = 0;
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| 71 |
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| 72 | link_t *drv_link = drv->match_ids.ids.next;
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| 73 | while (drv_link != drv_head) {
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| 74 | link_t *dev_link = dev_head->next;
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| 75 | while (dev_link != dev_head) {
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| 76 | match_id_t *drv_id = list_get_instance(drv_link, match_id_t, link);
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| 77 | match_id_t *dev_id = list_get_instance(dev_link, match_id_t, link);
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| 78 |
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| 79 | int score = compute_match_score(drv_id, dev_id);
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| 80 | if (score > highest_score) {
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| 81 | highest_score = score;
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| 82 | }
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| 83 |
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| 84 | dev_link = dev_link->next;
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| 85 | }
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| 86 |
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| 87 | drv_link = drv_link->next;
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| 88 | }
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| 89 |
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| 90 | return highest_score;
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| 91 | }
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| 92 |
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| 93 | /** @}
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| 94 | */
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