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1 | /* |
1 | /* |
2 | * Copyright (c) 2008 Lukas Mejdrech |
2 | * Copyright (c) 2009 Lukas Mejdrech |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup net |
29 | /** @addtogroup net |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | 32 | ||
33 | /** @file |
33 | /** @file |
34 | * A character string to integer map implementation file. |
34 | * Character string to integer map implementation. |
- | 35 | * @see char_map.h |
|
35 | */ |
36 | */ |
36 | 37 | ||
37 | #include <errno.h> |
38 | #include <errno.h> |
38 | #include <malloc.h> |
39 | #include <malloc.h> |
39 | #include <unistd.h> |
40 | #include <unistd.h> |
40 | #include <string.h> |
41 | #include <string.h> |
41 | 42 | ||
42 | #include "char_map.h" |
43 | #include "char_map.h" |
43 | 44 | ||
44 | /** An internal magic value for a consistency check. |
45 | /** Internal magic value for a consistency check. |
45 | */ |
46 | */ |
46 | #define CHAR_MAP_MAGIC_VALUE 0x12345611 |
47 | #define CHAR_MAP_MAGIC_VALUE 0x12345611 |
47 | 48 | ||
48 | /** Adds the value with the key to the map. |
49 | /** Adds the value with the key to the map. |
49 | * Creates new nodes to map the key. |
50 | * Creates new nodes to map the key. |
50 | * @param map The character string to integer map. Input/output parameter. |
51 | * @param map The character string to integer map. Input/output parameter. |
51 | * @param identifier The key zero ('\0') terminated character string. The key character string is processed until the first terminating zero ('\0') character after the given length is found. Input parameter. |
52 | * @param identifier The key zero ('\\0') terminated character string. The key character string is processed until the first terminating zero ('\\0') character after the given length is found. Input parameter. |
52 | * @param length The key character string length. The parameter may be zero (0) which means that the string is processed until the terminating zero ('\0') character is found. Input parameter. |
53 | * @param length The key character string length. The parameter may be zero (0) which means that the string is processed until the terminating zero ('\\0') character is found. Input parameter. |
53 | * @param value The integral value to be stored for the key character string. Input parameter. |
54 | * @param value The integral value to be stored for the key character string. Input parameter. |
54 | * @returns EOK on success. |
55 | * @returns EOK on success. |
55 | * @returns ENOMEM if there is no memory left. |
56 | * @returns ENOMEM if there is not enough memory left. |
56 | * @returns EEXIST if the key character string is already used. |
57 | * @returns EEXIST if the key character string is already used. |
57 | */ |
58 | */ |
58 | int char_map_add_item( char_map_ref map, const char * identifier, size_t length, const int value ); |
59 | int char_map_add_item( char_map_ref map, const char * identifier, size_t length, const int value ); |
59 | 60 | ||
60 | /** Returns the node assigned to the key from the map. |
61 | /** Returns the node assigned to the key from the map. |
61 | * @param map The character string to integer map. Input parameter. |
62 | * @param map The character string to integer map. Input parameter. |
62 | * @param identifier The key zero ('\0') terminated character string. The key character string is processed until the first terminating zero ('\0') character after the given length is found. Input parameter. |
63 | * @param identifier The key zero ('\\0') terminated character string. The key character string is processed until the first terminating zero ('\\0') character after the given length is found. Input parameter. |
63 | * @param length The key character string length. The parameter may be zero (0) which means that the string is processed until the terminating zero ('\0') character is found. Input parameter. |
64 | * @param length The key character string length. The parameter may be zero (0) which means that the string is processed until the terminating zero ('\\0') character is found. Input parameter. |
64 | * @returns The node holding the integral value assigned to the key character string. |
65 | * @returns The node holding the integral value assigned to the key character string. |
65 | * @returns NULL if the key is not assigned a node. |
66 | * @returns NULL if the key is not assigned a node. |
66 | */ |
67 | */ |
67 | char_map_ref char_map_find_node( const char_map_ref map, const char * identifier, const size_t length ); |
68 | char_map_ref char_map_find_node( const char_map_ref map, const char * identifier, const size_t length ); |
68 | 69 | ||
69 | /** Checks if the map is valid. |
70 | /** Checks if the map is valid. |
70 | * @param map The character string to integer map. Input parameter. |
71 | * @param map The character string to integer map. Input parameter. |
71 | * @returns TRUE if the map is valid. |
72 | * @returns TRUE if the map is valid. |
72 | * @returns FALSE otherwise. |
73 | * @returns FALSE otherwise. |
73 | */ |
74 | */ |
74 | int char_map_is_valid( const char_map_ref map ); |
75 | int char_map_is_valid( const char_map_ref map ); |
75 | 76 | ||
76 | int char_map_add( char_map_ref map, const char * identifier, size_t length, const int value ){ |
77 | int char_map_add( char_map_ref map, const char * identifier, size_t length, const int value ){ |
77 | if( char_map_is_valid( map ) && ( identifier ) && (( length ) || ( * identifier ))){ |
78 | if( char_map_is_valid( map ) && ( identifier ) && (( length ) || ( * identifier ))){ |
78 | int index; |
79 | int index; |
79 | 80 | ||
80 | for( index = 0; index < map->next; ++ index ){ |
81 | for( index = 0; index < map->next; ++ index ){ |
81 | if( map->items[ index ]->c == * identifier ){ |
82 | if( map->items[ index ]->c == * identifier ){ |
82 | ++ identifier; |
83 | ++ identifier; |
83 | if( length ) -- length; |
84 | if( length ) -- length; |
84 | if( length || ( * identifier )){ |
85 | if( length || ( * identifier )){ |
85 | return char_map_add( map->items[ index ], identifier, length, value ); |
86 | return char_map_add( map->items[ index ], identifier, length, value ); |
86 | }else{ |
87 | }else{ |
87 | if( map->items[ index ]->value != CHAR_MAP_NULL ) return EEXISTS; |
88 | if( map->items[ index ]->value != CHAR_MAP_NULL ) return EEXISTS; |
88 | map->items[ index ]->value = value; |
89 | map->items[ index ]->value = value; |
89 | return EOK; |
90 | return EOK; |
90 | } |
91 | } |
91 | } |
92 | } |
92 | } |
93 | } |
93 | return char_map_add_item( map, identifier, length, value ); |
94 | return char_map_add_item( map, identifier, length, value ); |
94 | } |
95 | } |
95 | return EINVAL; |
96 | return EINVAL; |
96 | } |
97 | } |
97 | 98 | ||
98 | int char_map_add_item( char_map_ref map, const char * identifier, size_t length, const int value ){ |
99 | int char_map_add_item( char_map_ref map, const char * identifier, size_t length, const int value ){ |
99 | if( map->next == ( map->size - 1 )){ |
100 | if( map->next == ( map->size - 1 )){ |
100 | char_map_ref * tmp; |
101 | char_map_ref * tmp; |
101 | 102 | ||
102 | tmp = ( char_map_ref * ) malloc( sizeof( char_map_ref ) * 2 * map->size ); |
103 | tmp = ( char_map_ref * ) malloc( sizeof( char_map_ref ) * 2 * map->size ); |
103 | if( ! tmp ) return ENOMEM; |
104 | if( ! tmp ) return ENOMEM; |
104 | map->size *= 2; |
105 | map->size *= 2; |
105 | memcpy( tmp, map->items, sizeof( char_map_ref ) * map->next ); |
106 | memcpy( tmp, map->items, sizeof( char_map_ref ) * map->next ); |
106 | free( map->items ); |
107 | free( map->items ); |
107 | map->items = tmp; |
108 | map->items = tmp; |
108 | } |
109 | } |
109 | map->items[ map->next ] = ( char_map_ref ) malloc( sizeof( char_map_t )); |
110 | map->items[ map->next ] = ( char_map_ref ) malloc( sizeof( char_map_t )); |
110 | if( ! map->items[ map->next ] ) return ENOMEM; |
111 | if( ! map->items[ map->next ] ) return ENOMEM; |
111 | char_map_initialize( map->items[ map->next ] ); |
112 | char_map_initialize( map->items[ map->next ] ); |
112 | map->items[ map->next ]->c = * identifier; |
113 | map->items[ map->next ]->c = * identifier; |
113 | ++ identifier; |
114 | ++ identifier; |
114 | if( length ) -- length; |
115 | if( length ) -- length; |
115 | ++ map->next; |
116 | ++ map->next; |
116 | if( length || ( * identifier )){ |
117 | if( length || ( * identifier )){ |
117 | map->items[ map->next - 1 ]->value = CHAR_MAP_NULL; |
118 | map->items[ map->next - 1 ]->value = CHAR_MAP_NULL; |
118 | return char_map_add_item( map->items[ map->next - 1 ], identifier, length, value ); |
119 | return char_map_add_item( map->items[ map->next - 1 ], identifier, length, value ); |
119 | }else{ |
120 | }else{ |
120 | map->items[ map->next - 1 ]->value = value; |
121 | map->items[ map->next - 1 ]->value = value; |
121 | } |
122 | } |
122 | return EOK; |
123 | return EOK; |
123 | } |
124 | } |
124 | 125 | ||
125 | void char_map_destroy( char_map_ref map ){ |
126 | void char_map_destroy( char_map_ref map ){ |
126 | if( char_map_is_valid( map )){ |
127 | if( char_map_is_valid( map )){ |
127 | int index; |
128 | int index; |
128 | 129 | ||
129 | map->magic = 0; |
130 | map->magic = 0; |
130 | for( index = 0; index < map->next; ++ index ){ |
131 | for( index = 0; index < map->next; ++ index ){ |
131 | char_map_destroy( map->items[ index ] ); |
132 | char_map_destroy( map->items[ index ] ); |
132 | } |
133 | } |
133 | free( map->items ); |
134 | free( map->items ); |
134 | } |
135 | } |
135 | } |
136 | } |
136 | 137 | ||
137 | int char_map_exclude( char_map_ref map, const char * identifier, size_t length ){ |
138 | int char_map_exclude( char_map_ref map, const char * identifier, size_t length ){ |
138 | char_map_ref node; |
139 | char_map_ref node; |
139 | 140 | ||
140 | node = char_map_find_node( map, identifier, length ); |
141 | node = char_map_find_node( map, identifier, length ); |
141 | if( node ){ |
142 | if( node ){ |
142 | int value; |
143 | int value; |
143 | 144 | ||
144 | value = node->value; |
145 | value = node->value; |
145 | node->value = CHAR_MAP_NULL; |
146 | node->value = CHAR_MAP_NULL; |
146 | return value; |
147 | return value; |
147 | } |
148 | } |
148 | return CHAR_MAP_NULL; |
149 | return CHAR_MAP_NULL; |
149 | } |
150 | } |
150 | 151 | ||
151 | int char_map_find( const char_map_ref map, const char * identifier, size_t length ){ |
152 | int char_map_find( const char_map_ref map, const char * identifier, size_t length ){ |
152 | char_map_ref node; |
153 | char_map_ref node; |
153 | 154 | ||
154 | node = char_map_find_node( map, identifier, length ); |
155 | node = char_map_find_node( map, identifier, length ); |
155 | return node ? node->value : CHAR_MAP_NULL; |
156 | return node ? node->value : CHAR_MAP_NULL; |
156 | } |
157 | } |
157 | 158 | ||
158 | char_map_ref char_map_find_node( const char_map_ref map, const char * identifier, size_t length ){ |
159 | char_map_ref char_map_find_node( const char_map_ref map, const char * identifier, size_t length ){ |
159 | if( ! char_map_is_valid( map )) return NULL; |
160 | if( ! char_map_is_valid( map )) return NULL; |
160 | if( length ) -- length; |
161 | if( length ) -- length; |
161 | if( length || ( * identifier )){ |
162 | if( length || ( * identifier )){ |
162 | int index; |
163 | int index; |
163 | 164 | ||
164 | for( index = 0; index < map->next; ++ index ){ |
165 | for( index = 0; index < map->next; ++ index ){ |
165 | if( map->items[ index ]->c == * identifier ){ |
166 | if( map->items[ index ]->c == * identifier ){ |
166 | ++ identifier; |
167 | ++ identifier; |
167 | return char_map_find_node( map->items[ index ], identifier, length ); |
168 | return char_map_find_node( map->items[ index ], identifier, length ); |
168 | } |
169 | } |
169 | } |
170 | } |
170 | return NULL; |
171 | return NULL; |
171 | } |
172 | } |
172 | return map; |
173 | return map; |
173 | } |
174 | } |
174 | 175 | ||
175 | int char_map_get_value( const char_map_ref map ){ |
176 | int char_map_get_value( const char_map_ref map ){ |
176 | return char_map_is_valid( map ) ? map->value : CHAR_MAP_NULL; |
177 | return char_map_is_valid( map ) ? map->value : CHAR_MAP_NULL; |
177 | } |
178 | } |
178 | 179 | ||
179 | int char_map_initialize( char_map_ref map ){ |
180 | int char_map_initialize( char_map_ref map ){ |
180 | if( ! map ) return EINVAL; |
181 | if( ! map ) return EINVAL; |
181 | map->c = 0; |
182 | map->c = 0; |
182 | map->value = CHAR_MAP_NULL; |
183 | map->value = CHAR_MAP_NULL; |
183 | map->size = 2; |
184 | map->size = 2; |
184 | map->next = 0; |
185 | map->next = 0; |
185 | map->items = malloc( sizeof( char_map_ref ) * map->size ); |
186 | map->items = malloc( sizeof( char_map_ref ) * map->size ); |
186 | if( ! map->items ) return ENOMEM; |
187 | if( ! map->items ) return ENOMEM; |
187 | map->items[ map->next ] = NULL; |
188 | map->items[ map->next ] = NULL; |
188 | map->magic = CHAR_MAP_MAGIC_VALUE; |
189 | map->magic = CHAR_MAP_MAGIC_VALUE; |
189 | return EOK; |
190 | return EOK; |
190 | } |
191 | } |
191 | 192 | ||
192 | int char_map_is_valid( const char_map_ref map ){ |
193 | int char_map_is_valid( const char_map_ref map ){ |
193 | return map && ( map->magic == CHAR_MAP_MAGIC_VALUE ); |
194 | return map && ( map->magic == CHAR_MAP_MAGIC_VALUE ); |
194 | } |
195 | } |
195 | 196 | ||
196 | int char_map_update( char_map_ref map, const char * identifier, const size_t length, const int value ){ |
197 | int char_map_update( char_map_ref map, const char * identifier, const size_t length, const int value ){ |
197 | char_map_ref node; |
198 | char_map_ref node; |
198 | 199 | ||
199 | // if( ! char_map_is_valid( map )) return EINVAL; |
200 | // if( ! char_map_is_valid( map )) return EINVAL; |
200 | node = char_map_find_node( map, identifier, length ); |
201 | node = char_map_find_node( map, identifier, length ); |
201 | if( node ){ |
202 | if( node ){ |
202 | node->value = value; |
203 | node->value = value; |
203 | return EOK; |
204 | return EOK; |
204 | }else{ |
205 | }else{ |
205 | return char_map_add( map, identifier, length, value ); |
206 | return char_map_add( map, identifier, length, value ); |
206 | } |
207 | } |
207 | } |
208 | } |
208 | 209 | ||
209 | /** @} |
210 | /** @} |
210 | */ |
211 | */ |
211 | 212 |