comparison: src/ucx/map.c
src/ucx/map.c
- changeset 504
- c094afcdfb27
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| 503:aeaf7db26fac | 504:c094afcdfb27 |
|---|---|
| 1 /* | |
| 2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. | |
| 3 * | |
| 4 * Copyright 2023 Mike Becker, Olaf Wintermann All rights reserved. | |
| 5 * | |
| 6 * Redistribution and use in source and binary forms, with or without | |
| 7 * modification, are permitted provided that the following conditions are met: | |
| 8 * | |
| 9 * 1. Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * | |
| 12 * 2. Redistributions in binary form must reproduce the above copyright | |
| 13 * notice, this list of conditions and the following disclaimer in the | |
| 14 * documentation and/or other materials provided with the distribution. | |
| 15 * | |
| 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE | |
| 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
| 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
| 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | |
| 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | |
| 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
| 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
| 26 * POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #include "cx/map.h" | |
| 30 #include <string.h> | |
| 31 | |
| 32 // <editor-fold desc="empty map implementation"> | |
| 33 | |
| 34 static void cx_empty_map_noop(__attribute__((__unused__)) CxMap *map) { | |
| 35 // this is a noop, but MUST be implemented | |
| 36 } | |
| 37 | |
| 38 static void *cx_empty_map_get( | |
| 39 __attribute__((__unused__)) CxMap const *map, | |
| 40 __attribute__((__unused__)) CxHashKey key | |
| 41 ) { | |
| 42 return NULL; | |
| 43 } | |
| 44 | |
| 45 static bool cx_empty_map_iter_valid(__attribute__((__unused__)) void const *iter) { | |
| 46 return false; | |
| 47 } | |
| 48 | |
| 49 static CxIterator cx_empty_map_iterator( | |
| 50 struct cx_map_s const *map, | |
| 51 __attribute__((__unused__)) enum cx_map_iterator_type type | |
| 52 ) { | |
| 53 CxIterator iter = {0}; | |
| 54 iter.src_handle = map; | |
| 55 iter.base.valid = cx_empty_map_iter_valid; | |
| 56 return iter; | |
| 57 } | |
| 58 | |
| 59 static struct cx_map_class_s cx_empty_map_class = { | |
| 60 cx_empty_map_noop, | |
| 61 cx_empty_map_noop, | |
| 62 NULL, | |
| 63 cx_empty_map_get, | |
| 64 NULL, | |
| 65 cx_empty_map_iterator | |
| 66 }; | |
| 67 | |
| 68 CxMap cx_empty_map = { | |
| 69 NULL, | |
| 70 NULL, | |
| 71 0, | |
| 72 0, | |
| 73 NULL, | |
| 74 NULL, | |
| 75 NULL, | |
| 76 false, | |
| 77 &cx_empty_map_class | |
| 78 }; | |
| 79 | |
| 80 CxMap *const cxEmptyMap = &cx_empty_map; | |
| 81 | |
| 82 // </editor-fold> | |
| 83 | |
| 84 CxMutIterator cxMapMutIteratorValues(CxMap *map) { | |
| 85 CxIterator it = map->cl->iterator(map, CX_MAP_ITERATOR_VALUES); | |
| 86 it.base.mutating = true; | |
| 87 | |
| 88 // we know the iterators share the same memory layout | |
| 89 CxMutIterator iter; | |
| 90 memcpy(&iter, &it, sizeof(CxMutIterator)); | |
| 91 return iter; | |
| 92 } | |
| 93 | |
| 94 CxMutIterator cxMapMutIteratorKeys(CxMap *map) { | |
| 95 CxIterator it = map->cl->iterator(map, CX_MAP_ITERATOR_KEYS); | |
| 96 it.base.mutating = true; | |
| 97 | |
| 98 // we know the iterators share the same memory layout | |
| 99 CxMutIterator iter; | |
| 100 memcpy(&iter, &it, sizeof(CxMutIterator)); | |
| 101 return iter; | |
| 102 } | |
| 103 | |
| 104 CxMutIterator cxMapMutIterator(CxMap *map) { | |
| 105 CxIterator it = map->cl->iterator(map, CX_MAP_ITERATOR_PAIRS); | |
| 106 it.base.mutating = true; | |
| 107 | |
| 108 // we know the iterators share the same memory layout | |
| 109 CxMutIterator iter; | |
| 110 memcpy(&iter, &it, sizeof(CxMutIterator)); | |
| 111 return iter; | |
| 112 } |
