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1#include "test-tool.h"
2#include "git-compat-util.h"
3#include "hashmap.h"
4#include "strbuf.h"
5#include "string-list.h"
6
7struct test_entry
8{
9 int padding; /* hashmap entry no longer needs to be the first member */
10 struct hashmap_entry ent;
11 /* key and value as two \0-terminated strings */
12 char key[FLEX_ARRAY];
13};
14
15static int test_entry_cmp(const void *cmp_data,
16 const struct hashmap_entry *eptr,
17 const struct hashmap_entry *entry_or_key,
18 const void *keydata)
19{
20 const int ignore_case = cmp_data ? *((int *)cmp_data) : 0;
21 const struct test_entry *e1, *e2;
22 const char *key = keydata;
23
24 e1 = container_of(eptr, const struct test_entry, ent);
25 e2 = container_of(entry_or_key, const struct test_entry, ent);
26
27 if (ignore_case)
28 return strcasecmp(e1->key, key ? key : e2->key);
29 else
30 return strcmp(e1->key, key ? key : e2->key);
31}
32
33static struct test_entry *alloc_test_entry(unsigned int hash,
34 const char *key,
35 const char *value)
36{
37 size_t klen = strlen(key);
38 size_t vlen = strlen(value);
39 struct test_entry *entry = xmalloc(st_add4(sizeof(*entry), klen, vlen, 2));
40 hashmap_entry_init(&entry->ent, hash);
41 memcpy(entry->key, key, klen + 1);
42 memcpy(entry->key + klen + 1, value, vlen + 1);
43 return entry;
44}
45
46#define HASH_METHOD_FNV 0
47#define HASH_METHOD_I 1
48#define HASH_METHOD_IDIV10 2
49#define HASH_METHOD_0 3
50#define HASH_METHOD_X2 4
51#define TEST_SPARSE 8
52#define TEST_ADD 16
53#define TEST_SIZE 100000
54
55static unsigned int hash(unsigned int method, unsigned int i, const char *key)
56{
57 unsigned int hash = 0;
58 switch (method & 3)
59 {
60 case HASH_METHOD_FNV:
61 hash = strhash(key);
62 break;
63 case HASH_METHOD_I:
64 hash = i;
65 break;
66 case HASH_METHOD_IDIV10:
67 hash = i / 10;
68 break;
69 case HASH_METHOD_0:
70 hash = 0;
71 break;
72 }
73
74 if (method & HASH_METHOD_X2)
75 hash = 2 * hash;
76 return hash;
77}
78
79/*
80 * Test performance of hashmap.[ch]
81 * Usage: time echo "perfhashmap method rounds" | test-tool hashmap
82 */
83static void perf_hashmap(unsigned int method, unsigned int rounds)
84{
85 struct hashmap map;
86 char buf[16];
87 struct test_entry **entries;
88 unsigned int *hashes;
89 unsigned int i, j;
90
91 ALLOC_ARRAY(entries, TEST_SIZE);
92 ALLOC_ARRAY(hashes, TEST_SIZE);
93 for (i = 0; i < TEST_SIZE; i++) {
94 xsnprintf(buf, sizeof(buf), "%i", i);
95 entries[i] = alloc_test_entry(0, buf, "");
96 hashes[i] = hash(method, i, entries[i]->key);
97 }
98
99 if (method & TEST_ADD) {
100 /* test adding to the map */
101 for (j = 0; j < rounds; j++) {
102 hashmap_init(&map, test_entry_cmp, NULL, 0);
103
104 /* add entries */
105 for (i = 0; i < TEST_SIZE; i++) {
106 hashmap_entry_init(&entries[i]->ent, hashes[i]);
107 hashmap_add(&map, &entries[i]->ent);
108 }
109
110 hashmap_clear(&map);
111 }
112 } else {
113 /* test map lookups */
114 hashmap_init(&map, test_entry_cmp, NULL, 0);
115
116 /* fill the map (sparsely if specified) */
117 j = (method & TEST_SPARSE) ? TEST_SIZE / 10 : TEST_SIZE;
118 for (i = 0; i < j; i++) {
119 hashmap_entry_init(&entries[i]->ent, hashes[i]);
120 hashmap_add(&map, &entries[i]->ent);
121 }
122
123 for (j = 0; j < rounds; j++) {
124 for (i = 0; i < TEST_SIZE; i++) {
125 hashmap_get_from_hash(&map, hashes[i],
126 entries[i]->key);
127 }
128 }
129
130 hashmap_clear(&map);
131 }
132}
133
134#define DELIM " \t\r\n"
135
136/*
137 * Read stdin line by line and print result of commands to stdout:
138 *
139 * perfhashmap method rounds -> test hashmap.[ch] performance
140 */
141int cmd__hashmap(int argc UNUSED, const char **argv UNUSED)
142{
143 struct string_list parts = STRING_LIST_INIT_NODUP;
144 struct strbuf line = STRBUF_INIT;
145
146 /* process commands from stdin */
147 while (strbuf_getline(&line, stdin) != EOF) {
148 char *cmd, *p1, *p2;
149
150 /* break line into command and up to two parameters */
151 string_list_setlen(&parts, 0);
152 string_list_split_in_place(&parts, line.buf, DELIM, 2);
153 string_list_remove_empty_items(&parts, 0);
154
155 /* ignore empty lines */
156 if (!parts.nr)
157 continue;
158 if (!*parts.items[0].string || *parts.items[0].string == '#')
159 continue;
160
161 cmd = parts.items[0].string;
162 p1 = parts.nr >= 1 ? parts.items[1].string : NULL;
163 p2 = parts.nr >= 2 ? parts.items[2].string : NULL;
164
165 if (!strcmp("perfhashmap", cmd) && p1 && p2) {
166
167 perf_hashmap(atoi(p1), atoi(p2));
168
169 } else {
170
171 printf("Unknown command %s\n", cmd);
172
173 }
174 }
175
176 string_list_clear(&parts, 0);
177 strbuf_release(&line);
178 return 0;
179}