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-rw-r--r--Documentation/technical/api-hash.txt52
-rw-r--r--Makefile2
-rw-r--r--cache.h1
-rw-r--r--hash.c110
-rw-r--r--hash.h50
-rw-r--r--test-hashmap.c84
6 files changed, 0 insertions, 299 deletions
diff --git a/Documentation/technical/api-hash.txt b/Documentation/technical/api-hash.txt
deleted file mode 100644
index e5061e0..0000000
--- a/Documentation/technical/api-hash.txt
+++ /dev/null
@@ -1,52 +0,0 @@
-hash API
-========
-
-The hash API is a collection of simple hash table functions. Users are expected
-to implement their own hashing.
-
-Data Structures
----------------
-
-`struct hash_table`::
-
- The hash table structure. The `array` member points to the hash table
- entries. The `size` member counts the total number of valid and invalid
- entries in the table. The `nr` member keeps track of the number of
- valid entries.
-
-`struct hash_table_entry`::
-
- An opaque structure representing an entry in the hash table. The `hash`
- member is the entry's hash key and the `ptr` member is the entry's
- value.
-
-Functions
----------
-
-`init_hash`::
-
- Initialize the hash table.
-
-`free_hash`::
-
- Release memory associated with the hash table.
-
-`insert_hash`::
-
- Insert a pointer into the hash table. If an entry with that hash
- already exists, a pointer to the existing entry's value is returned.
- Otherwise NULL is returned. This allows callers to implement
- chaining, etc.
-
-`lookup_hash`::
-
- Lookup an entry in the hash table. If an entry with that hash exists
- the entry's value is returned. Otherwise NULL is returned.
-
-`for_each_hash`::
-
- Call a function for each entry in the hash table. The function is
- expected to take the entry's value as its only argument and return an
- int. If the function returns a negative int the loop is aborted
- immediately. Otherwise, the return value is accumulated and the sum
- returned upon completion of the loop.
diff --git a/Makefile b/Makefile
index d8d3d67..f495dd4 100644
--- a/Makefile
+++ b/Makefile
@@ -677,7 +677,6 @@ LIB_H += git-compat-util.h
LIB_H += gpg-interface.h
LIB_H += graph.h
LIB_H += grep.h
-LIB_H += hash.h
LIB_H += hashmap.h
LIB_H += help.h
LIB_H += http.h
@@ -809,7 +808,6 @@ LIB_OBJS += gettext.o
LIB_OBJS += gpg-interface.o
LIB_OBJS += graph.o
LIB_OBJS += grep.o
-LIB_OBJS += hash.o
LIB_OBJS += hashmap.o
LIB_OBJS += help.o
LIB_OBJS += hex.o
diff --git a/cache.h b/cache.h
index 1f11e24..407145c 100644
--- a/cache.h
+++ b/cache.h
@@ -3,7 +3,6 @@
#include "git-compat-util.h"
#include "strbuf.h"
-#include "hash.h"
#include "hashmap.h"
#include "advice.h"
#include "gettext.h"
diff --git a/hash.c b/hash.c
deleted file mode 100644
index 749ecfe..0000000
--- a/hash.c
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- * Some generic hashing helpers.
- */
-#include "cache.h"
-#include "hash.h"
-
-/*
- * Look up a hash entry in the hash table. Return the pointer to
- * the existing entry, or the empty slot if none existed. The caller
- * can then look at the (*ptr) to see whether it existed or not.
- */
-static struct hash_table_entry *lookup_hash_entry(unsigned int hash, const struct hash_table *table)
-{
- unsigned int size = table->size, nr = hash % size;
- struct hash_table_entry *array = table->array;
-
- while (array[nr].ptr) {
- if (array[nr].hash == hash)
- break;
- nr++;
- if (nr >= size)
- nr = 0;
- }
- return array + nr;
-}
-
-
-/*
- * Insert a new hash entry pointer into the table.
- *
- * If that hash entry already existed, return the pointer to
- * the existing entry (and the caller can create a list of the
- * pointers or do anything else). If it didn't exist, return
- * NULL (and the caller knows the pointer has been inserted).
- */
-static void **insert_hash_entry(unsigned int hash, void *ptr, struct hash_table *table)
-{
- struct hash_table_entry *entry = lookup_hash_entry(hash, table);
-
- if (!entry->ptr) {
- entry->ptr = ptr;
- entry->hash = hash;
- table->nr++;
- return NULL;
- }
- return &entry->ptr;
-}
-
-static void grow_hash_table(struct hash_table *table)
-{
- unsigned int i;
- unsigned int old_size = table->size, new_size;
- struct hash_table_entry *old_array = table->array, *new_array;
-
- new_size = alloc_nr(old_size);
- new_array = xcalloc(sizeof(struct hash_table_entry), new_size);
- table->size = new_size;
- table->array = new_array;
- table->nr = 0;
- for (i = 0; i < old_size; i++) {
- unsigned int hash = old_array[i].hash;
- void *ptr = old_array[i].ptr;
- if (ptr)
- insert_hash_entry(hash, ptr, table);
- }
- free(old_array);
-}
-
-void *lookup_hash(unsigned int hash, const struct hash_table *table)
-{
- if (!table->array)
- return NULL;
- return lookup_hash_entry(hash, table)->ptr;
-}
-
-void **insert_hash(unsigned int hash, void *ptr, struct hash_table *table)
-{
- unsigned int nr = table->nr;
- if (nr >= table->size/2)
- grow_hash_table(table);
- return insert_hash_entry(hash, ptr, table);
-}
-
-int for_each_hash(const struct hash_table *table, int (*fn)(void *, void *), void *data)
-{
- int sum = 0;
- unsigned int i;
- unsigned int size = table->size;
- struct hash_table_entry *array = table->array;
-
- for (i = 0; i < size; i++) {
- void *ptr = array->ptr;
- array++;
- if (ptr) {
- int val = fn(ptr, data);
- if (val < 0)
- return val;
- sum += val;
- }
- }
- return sum;
-}
-
-void free_hash(struct hash_table *table)
-{
- free(table->array);
- table->array = NULL;
- table->size = 0;
- table->nr = 0;
-}
diff --git a/hash.h b/hash.h
deleted file mode 100644
index 1d43ac0..0000000
--- a/hash.h
+++ /dev/null
@@ -1,50 +0,0 @@
-#ifndef HASH_H
-#define HASH_H
-
-/*
- * These are some simple generic hash table helper functions.
- * Not necessarily suitable for all users, but good for things
- * where you want to just keep track of a list of things, and
- * have a good hash to use on them.
- *
- * It keeps the hash table at roughly 50-75% free, so the memory
- * cost of the hash table itself is roughly
- *
- * 3 * 2*sizeof(void *) * nr_of_objects
- *
- * bytes.
- *
- * FIXME: on 64-bit architectures, we waste memory. It would be
- * good to have just 32-bit pointers, requiring a special allocator
- * for hashed entries or something.
- */
-struct hash_table_entry {
- unsigned int hash;
- void *ptr;
-};
-
-struct hash_table {
- unsigned int size, nr;
- struct hash_table_entry *array;
-};
-
-extern void *lookup_hash(unsigned int hash, const struct hash_table *table);
-extern void **insert_hash(unsigned int hash, void *ptr, struct hash_table *table);
-extern int for_each_hash(const struct hash_table *table, int (*fn)(void *, void *), void *data);
-extern void free_hash(struct hash_table *table);
-
-static inline void init_hash(struct hash_table *table)
-{
- table->size = 0;
- table->nr = 0;
- table->array = NULL;
-}
-
-static inline void preallocate_hash(struct hash_table *table, unsigned int elts)
-{
- assert(table->size == 0 && table->nr == 0 && table->array == NULL);
- table->size = elts * 2;
- table->array = xcalloc(sizeof(struct hash_table_entry), table->size);
-}
-
-#endif
diff --git a/test-hashmap.c b/test-hashmap.c
index 581d296..7e86f88 100644
--- a/test-hashmap.c
+++ b/test-hashmap.c
@@ -126,85 +126,6 @@ static void perf_hashmap(unsigned int method, unsigned int rounds)
}
}
-struct hash_entry
-{
- struct hash_entry *next;
- char key[FLEX_ARRAY];
-};
-
-/*
- * Test performance of hash.[ch]
- * Usage: time echo "perfhash method rounds" | test-hashmap
- */
-static void perf_hash(unsigned int method, unsigned int rounds)
-{
- struct hash_table map;
- char buf[16];
- struct hash_entry **entries, **res, *entry;
- unsigned int *hashes;
- unsigned int i, j;
-
- entries = malloc(TEST_SIZE * sizeof(struct hash_entry *));
- hashes = malloc(TEST_SIZE * sizeof(int));
- for (i = 0; i < TEST_SIZE; i++) {
- snprintf(buf, sizeof(buf), "%i", i);
- entries[i] = malloc(sizeof(struct hash_entry) + strlen(buf) + 1);
- strcpy(entries[i]->key, buf);
- hashes[i] = hash(method, i, entries[i]->key);
- }
-
- if (method & TEST_ADD) {
- /* test adding to the map */
- for (j = 0; j < rounds; j++) {
- init_hash(&map);
-
- /* add entries */
- for (i = 0; i < TEST_SIZE; i++) {
- res = (struct hash_entry **) insert_hash(
- hashes[i], entries[i], &map);
- if (res) {
- entries[i]->next = *res;
- *res = entries[i];
- } else {
- entries[i]->next = NULL;
- }
- }
-
- free_hash(&map);
- }
- } else {
- /* test map lookups */
- init_hash(&map);
-
- /* fill the map (sparsely if specified) */
- j = (method & TEST_SPARSE) ? TEST_SIZE / 10 : TEST_SIZE;
- for (i = 0; i < j; i++) {
- res = (struct hash_entry **) insert_hash(hashes[i],
- entries[i], &map);
- if (res) {
- entries[i]->next = *res;
- *res = entries[i];
- } else {
- entries[i]->next = NULL;
- }
- }
-
- for (j = 0; j < rounds; j++) {
- for (i = 0; i < TEST_SIZE; i++) {
- entry = lookup_hash(hashes[i], &map);
- while (entry) {
- if (!strcmp(entries[i]->key, entry->key))
- break;
- entry = entry->next;
- }
- }
- }
-
- free_hash(&map);
-
- }
-}
-
#define DELIM " \t\r\n"
/*
@@ -218,7 +139,6 @@ static void perf_hash(unsigned int method, unsigned int rounds)
* size -> tablesize numentries
*
* perfhashmap method rounds -> test hashmap.[ch] performance
- * perfhash method rounds -> test hash.[ch] performance
*/
int main(int argc, char *argv[])
{
@@ -324,10 +244,6 @@ int main(int argc, char *argv[])
perf_hashmap(atoi(p1), atoi(p2));
- } else if (!strcmp("perfhash", cmd) && l1 && l2) {
-
- perf_hash(atoi(p1), atoi(p2));
-
} else {
printf("Unknown command %s\n", cmd);