Commit 7c414e14430ca651162ed573fb06f37bbd7c8b98
1 parent
64f2bf41
first creation of simple string indexed hash
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2 changed files
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178 additions
and
0 deletions
bigpoint_hash.c
0 → 100644
| 1 | +#include <string.h> | ||
| 2 | +#include <stdlib.h> | ||
| 3 | +#include <json/json.h> | ||
| 4 | + | ||
| 5 | +#include "bigpoint_hash.h" | ||
| 6 | + | ||
| 7 | + | ||
| 8 | +#define HASH_ENTRY_CHUNK_SIZE 128 | ||
| 9 | + | ||
| 10 | + | ||
| 11 | +static | ||
| 12 | +void | ||
| 13 | +__construct(struct BIGPOINT_HASH * _this, va_list * params) | ||
| 14 | +{ | ||
| 15 | + _this->size = 0; | ||
| 16 | + _this->used = 0; | ||
| 17 | + _updateHashSize(_this); | ||
| 18 | +} | ||
| 19 | + | ||
| 20 | +static | ||
| 21 | +void | ||
| 22 | +__jsonConst(struct BIGPOINT_HASH * _this, struct json_object * json) | ||
| 23 | +{ | ||
| 24 | +} | ||
| 25 | + | ||
| 26 | +static | ||
| 27 | +void | ||
| 28 | +__destruct(struct BIGPOINT_HASH * _this) | ||
| 29 | +{ | ||
| 30 | + size_t index; | ||
| 31 | + | ||
| 32 | + for (index = 0; index < _this->used; index ++) { | ||
| 33 | + free(_this->keys[index]); | ||
| 34 | + } | ||
| 35 | + | ||
| 36 | + free(_this->keys); | ||
| 37 | + free(_this->values); | ||
| 38 | +} | ||
| 39 | + | ||
| 40 | +static | ||
| 41 | +struct json_object * | ||
| 42 | +__toJson(struct BIGPOINT_HASH * _this) | ||
| 43 | +{ | ||
| 44 | +} | ||
| 45 | + | ||
| 46 | +static const | ||
| 47 | +struct BIGPOINT_CCLASS _bigpoint_hash = { | ||
| 48 | + sizeof(struct BIGPOINT_HASH), | ||
| 49 | + (ctor)__construct, | ||
| 50 | + (jCtor)__jsonConst, | ||
| 51 | + (dtor)__destruct, | ||
| 52 | + (jTo)__toJson | ||
| 53 | +}; | ||
| 54 | + | ||
| 55 | +const struct BIGPOINT_CCLASS * const BIGPOINT_HASH = &_bigpoint_hash; | ||
| 56 | + | ||
| 57 | +static | ||
| 58 | +void | ||
| 59 | +_updateHashSize(struct BIGPOINT_HASH * _this) | ||
| 60 | +{ | ||
| 61 | + if (_this->used == _this->size) { | ||
| 62 | + _this->size += HASH_ENTRY_CHUNK_SIZE; | ||
| 63 | + | ||
| 64 | + _this->keys = realloc(_this->keys, sizeof(char*) * _this->size); | ||
| 65 | + memset(_this->keys + (_this->used * sizeof(char*)), | ||
| 66 | + HASH_ENTRY_CHUNK_SIZE * sizeof(char*), | ||
| 67 | + 0); | ||
| 68 | + | ||
| 69 | + _this->values = realloc( | ||
| 70 | + _this->values, | ||
| 71 | + sizeof(struct BIGPOINT_DYNTYPE *) * _this->size, | ||
| 72 | + 0); | ||
| 73 | + memset(_this->values + (_this->used * sizeof(struct BIGPOINT_DYNTYPE *)), | ||
| 74 | + HASH_ENTRY_CHUNK_SIZE * sizeof(struct BIGPOINT_DYNTYPE *), | ||
| 75 | + 0); | ||
| 76 | + } | ||
| 77 | +} | ||
| 78 | + | ||
| 79 | +static | ||
| 80 | +size_t | ||
| 81 | +_getHashIdx(struct BIGPOINT_HASH * _this, const char * key) | ||
| 82 | +{ | ||
| 83 | + size_t index; | ||
| 84 | + | ||
| 85 | + for (index = 0; | ||
| 86 | + index < _this->used && strcmp(_this->key[index], key); | ||
| 87 | + index++); | ||
| 88 | + | ||
| 89 | + return index; | ||
| 90 | +} | ||
| 91 | + | ||
| 92 | +void | ||
| 93 | +bigpoint_hash_set(struct BIGPOINT_HASH * _this, | ||
| 94 | + const char * key, | ||
| 95 | + struct BIGPOINT_DYNTYPE * value) | ||
| 96 | +{ | ||
| 97 | + size_t index = _getHashIdx(_this, key); | ||
| 98 | + | ||
| 99 | + if (index == _this->used) { | ||
| 100 | + index = _this->used = index + 1; | ||
| 101 | + } | ||
| 102 | + | ||
| 103 | + _this->keys[index] = calloc(strlen(key) + 1, sizeof(char)); | ||
| 104 | + memcpy(_this->keys[index], key, strlen(key)); | ||
| 105 | + | ||
| 106 | + _this->values[index] = value; | ||
| 107 | + | ||
| 108 | + _updateHashSize(_this); | ||
| 109 | +} | ||
| 110 | + | ||
| 111 | +struct BIGPOINT_DYNTYPE * | ||
| 112 | +bigpoint_hash_get(struct BIGPOINT_HASH * _this, const char * key) | ||
| 113 | +{ | ||
| 114 | + size_t index = _getHashIdx(_this, key); | ||
| 115 | + | ||
| 116 | + if (index == _this->used) { | ||
| 117 | + return NULL; | ||
| 118 | + } | ||
| 119 | + | ||
| 120 | + return _this->value[index]; | ||
| 121 | +} | ||
| 122 | + | ||
| 123 | +struct BIGPOINT_DYNTYPE * | ||
| 124 | +bigpoint_hash_del(struct BIGPOINT_HASH * _this, const char * key) | ||
| 125 | +{ | ||
| 126 | + struct BIGPOINT_DYNTYPE * found = NULL; | ||
| 127 | + size_t index = _getHashIdx(_this, key); | ||
| 128 | + | ||
| 129 | + if (index == _this->used) { | ||
| 130 | + return NULL; | ||
| 131 | + } | ||
| 132 | + | ||
| 133 | + free(_this->key[index]); | ||
| 134 | + | ||
| 135 | + memmove(_this->key + index + 1, | ||
| 136 | + _this->key + index, | ||
| 137 | + (_this->size - index) * sizeof(char*)); | ||
| 138 | + | ||
| 139 | + memmove(_this->value + index + 1, | ||
| 140 | + _this->value + index, | ||
| 141 | + (_this->size - index) * sizeof(struct BIGPOINT_DYNTYPE *)); | ||
| 142 | + | ||
| 143 | + _this->used -= 1; | ||
| 144 | +} | ||
| 145 | + | ||
| 146 | +// vim: set et ts=4 sw=4: |
bigpoint_hash.h
0 → 100644
| 1 | +#ifndef __BIGPOINT_HASH_H__ | ||
| 2 | +#define __BIGPOINT_HASH_H__ | ||
| 3 | + | ||
| 4 | +#include <sys/types.h> | ||
| 5 | + | ||
| 6 | +#include "bigpoint_cclass.h" | ||
| 7 | +#include "bigpoint_dyntype.h" | ||
| 8 | + | ||
| 9 | + | ||
| 10 | +struct BIGPOINT_HASH { | ||
| 11 | + const struct BIGPOINT_CCLASS * const class; | ||
| 12 | + char ** keys; | ||
| 13 | + struct BIGPOINT_DYNTYPE ** values; | ||
| 14 | + size_t size; | ||
| 15 | + size_t used; | ||
| 16 | +}; | ||
| 17 | + | ||
| 18 | +extern const struct BIGPOINT_CCLASS * const BIGPOINT_DYNTYPE; | ||
| 19 | + | ||
| 20 | +void bigpoint_hash_set(struct BIGPOINT_HASH * _this, | ||
| 21 | + const char * key, | ||
| 22 | + struct BIGPOINT_DYNTYPE * value); | ||
| 23 | + | ||
| 24 | +struct BIGPOINT_DYNTYPE * | ||
| 25 | +bigpoint_hash_get(struct BIGPOINT_HASH * _this, const char * key); | ||
| 26 | + | ||
| 27 | +struct BIGPOINT_DYNTYPE * | ||
| 28 | +bigpoint_hash_del(struct BIGPOINT_HASH * _this, const char * key); | ||
| 29 | + | ||
| 30 | +#endif//__BIGPOINT_HASH_H__ | ||
| 31 | + | ||
| 32 | +// vim: set et ts=4 sw=4: |
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