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
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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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