| 1 | /*
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| 2 | * Copyright (c) 2009 Lukas Mejdrech
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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 libc
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| 30 | * @{
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| 31 | */
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| 32 |
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| 33 | /** @file
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| 34 | * Character string to integer map.
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| 35 | */
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| 36 |
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| 37 | #ifndef LIBC_CHAR_MAP_H_
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| 38 | #define LIBC_CHAR_MAP_H_
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| 39 |
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| 40 | #include <libarch/types.h>
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| 41 |
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| 42 | /** Invalid assigned value used also if an entry does not exist. */
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| 43 | #define CHAR_MAP_NULL (-1)
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| 44 |
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| 45 | /** Type definition of the character string to integer map.
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| 46 | * @see char_map
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| 47 | */
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| 48 | typedef struct char_map char_map_t;
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| 49 |
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| 50 | /** Type definition of the character string to integer map pointer.
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| 51 | * @see char_map
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| 52 | */
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| 53 | typedef char_map_t *char_map_ref;
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| 54 |
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| 55 | /** Character string to integer map item.
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| 56 | *
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| 57 | * This structure recursivelly contains itself as a character by character tree.
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| 58 | * The actually mapped character string consists of all the parent characters
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| 59 | * and the actual one.
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| 60 | */
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| 61 | struct char_map {
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| 62 | /** Actually mapped character. */
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| 63 | char c;
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| 64 | /** Stored integral value. */
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| 65 | int value;
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| 66 | /** Next character array size. */
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| 67 | int size;
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| 68 | /** First free position in the next character array. */
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| 69 | int next;
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| 70 | /** Next character array. */
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| 71 | char_map_ref *items;
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| 72 | /** Consistency check magic value. */
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| 73 | int magic;
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| 74 | };
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| 75 |
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| 76 | extern int char_map_initialize(char_map_ref);
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| 77 | extern void char_map_destroy(char_map_ref);
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| 78 | extern int char_map_exclude(char_map_ref, const char *, size_t);
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| 79 | extern int char_map_add(char_map_ref, const char *, size_t, const int);
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| 80 | extern int char_map_find(const char_map_ref, const char *, size_t);
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| 81 | extern int char_map_update(char_map_ref, const char *, size_t, const int);
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| 82 |
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| 83 | #endif
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| 84 |
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| 85 | /** @}
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| 86 | */
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