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| Rev | Author | Line No. | Line |
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| 3666 | mejdrech | 1 | /* |
| 2 | * Copyright (c) 2008 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 | |||
| 29 | /** @addtogroup net |
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| 30 | * @{ |
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| 31 | */ |
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| 32 | |||
| 33 | /** |
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| 34 | * @file |
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| 35 | */ |
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| 36 | |||
| 37 | #ifndef __GENERIC_FIELD_H__ |
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| 38 | #define __GENERIC_FIELD_H__ |
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| 39 | |||
| 40 | #include <errno.h> |
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| 41 | #include <malloc.h> |
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| 42 | #include <string.h> |
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| 43 | #include <unistd.h> |
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| 44 | |||
| 45 | #define GENERIC_FIELD_MAGIC_VALUE 0x55667788 |
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| 46 | |||
| 47 | #define GENERIC_FIELD_DECLARE( name, type ) \ |
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| 48 | \ |
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| 49 | typedef struct name name##_t; \ |
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| 50 | typedef name##_t * name##_ref; \ |
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| 51 | \ |
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| 52 | struct name{ \ |
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| 53 | int size; \ |
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| 54 | int next; \ |
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| 55 | type ** items; \ |
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| 56 | int magic; \ |
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| 57 | }; \ |
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| 58 | \ |
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| 59 | int name##_add( name##_ref field, type * value ); \ |
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| 60 | int name##_count( name##_ref field ); \ |
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| 61 | void name##_destroy( name##_ref field ); \ |
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| 62 | void name##_exclude_index( name##_ref field, int index ); \ |
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| 63 | type ** name##_get_field( name##_ref field ); \ |
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| 64 | type * name##_get_index( name##_ref field, int index ); \ |
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| 65 | int name##_initialize( name##_ref field ); \ |
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| 66 | int name##_is_valid( name##_ref field ); |
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| 67 | |||
| 68 | #define GENERIC_FIELD_IMPLEMENT( name, type ) \ |
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| 69 | \ |
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| 70 | int name##_add( name##_ref field, type * value ){ \ |
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| 71 | if( name##_is_valid( field )){ \ |
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| 72 | if( field->next == ( field->size - 1 )){ \ |
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| 73 | type ** tmp; \ |
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| 74 | \ |
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| 75 | tmp = ( type ** ) malloc( sizeof( type * ) * 2 * field->size ); \ |
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| 76 | if( ! tmp ) return ENOMEM; \ |
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| 77 | field->size *= 2; \ |
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| 78 | memcpy( tmp, field->items, sizeof( type * ) * field->next ); \ |
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| 79 | free( field->items ); \ |
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| 80 | field->items = tmp; \ |
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| 81 | } \ |
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| 82 | field->items[ field->next ] = value; \ |
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| 83 | ++ field->next; \ |
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| 84 | field->items[ field->next ] = NULL; \ |
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| 85 | return field->next - 1; \ |
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| 86 | } \ |
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| 87 | return EINVAL; \ |
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| 88 | } \ |
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| 89 | \ |
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| 90 | int name##_count( name##_ref field ){ \ |
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| 91 | return name##_is_valid( field ) ? field->next : -1; \ |
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| 92 | } \ |
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| 93 | \ |
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| 94 | void name##_destroy( name##_ref field ){ \ |
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| 95 | if( name##_is_valid( field )){ \ |
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| 96 | int index; \ |
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| 97 | \ |
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| 98 | field->magic = 0; \ |
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| 99 | for( index = 0; index < field->next; ++ index ){ \ |
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| 100 | free( field->items[ index ] ); \ |
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| 101 | } \ |
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| 102 | free( field->items ); \ |
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| 103 | } \ |
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| 104 | } \ |
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| 105 | \ |
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| 106 | void name##_exclude_index( name##_ref field, int index ){ \ |
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| 107 | if( name##_is_valid( field ) && ( index >= 0 ) && ( index < field->next ) && ( field->items[ index ] )){ \ |
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| 108 | free( field->items[ index ] ); \ |
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| 109 | field->items[ index ] = NULL; \ |
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| 110 | } \ |
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| 111 | } \ |
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| 112 | \ |
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| 113 | type * name##_get_index( name##_ref field, int index ){ \ |
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| 114 | if( name##_is_valid( field ) && ( index >= 0 ) && ( index < field->next ) && ( field->items[ index ] )){ \ |
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| 115 | return field->items[ index ]; \ |
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| 116 | } \ |
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| 117 | return NULL; \ |
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| 118 | } \ |
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| 119 | \ |
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| 120 | type ** name##_get_field( name##_ref field ){ \ |
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| 121 | return name##_is_valid( field ) ? field->items : NULL; \ |
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| 122 | } \ |
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| 123 | \ |
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| 124 | int name##_initialize( name##_ref field ){ \ |
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| 125 | if( ! field ) return EINVAL; \ |
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| 126 | field->size = 2; \ |
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| 127 | field->next = 0; \ |
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| 128 | field->items = ( type ** ) malloc( sizeof( type * ) * field->size ); \ |
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| 129 | if( ! field->items ) return ENOMEM; \ |
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| 130 | field->items[ field->next ] = NULL; \ |
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| 3901 | mejdrech | 131 | field->magic = GENERIC_FIELD_MAGIC_VALUE; \ |
| 3666 | mejdrech | 132 | return EOK; \ |
| 133 | } \ |
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| 134 | \ |
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| 135 | int name##_is_valid( name##_ref field ){ \ |
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| 3901 | mejdrech | 136 | return field && ( field->magic == GENERIC_FIELD_MAGIC_VALUE ); \ |
| 3666 | mejdrech | 137 | } |
| 138 | |||
| 139 | #endif |
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| 140 | |||
| 141 | /** @} |
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| 142 | */ |
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| 143 |