Commit cc6926c5 authored by Florian Kaltenberger's avatar Florian Kaltenberger

removing duplicate files

parent 3d88f4ed
This diff is collapsed.
AM_CFLAGS = @ADD_CFLAGS@ \
-I$(top_srcdir)/COMMON
noinst_LTLIBRARIES = libhashtable.la
libhashtable_la_LDFLAGS = -all-static
libhashtable_la_SOURCES = \
hashtable.c hashtable.h \
obj_hashtable.c obj_hashtable.h
\ No newline at end of file
all: libhashtable.a
libhashtable_OBJECTS = \
hashtable.o \
obj_hashtable.o \
CFLAGS = \
-DUSER_MODE \
-DENABLE_USE_MME \
-g \
-O2 \
-Wall \
-Werror=implicit-function-declaration
-include .deps/*.d
$(libhashtable_OBJECTS): %.o : %.c
$(CC) -c $(CFLAGS) -o $@ $<
@if ! test -d ".deps" ; then mkdir -p .deps/; fi
@$(CC) -MM $(CFLAGS) $*.c > .deps/$*.d
@mv -f .deps/$*.d .deps/$*.d.tmp
@sed -e 's|.*:|$*.o:|' < .deps/$*.d.tmp > .deps/$*.d
@sed -e 's/.*://' -e 's/\\$$//' < .deps/$*.d.tmp | fmt -1 | \
sed -e 's/^ *//' -e 's/$$/:/' >> .deps/$*.d
@rm -f .deps/$*.d.tmp
libhashtable.a: $(libhashtable_OBJECTS)
$(AR) rcvs $@ $(libhashtable_OBJECTS)
clean:
rm -f libhashtable.a
rm -rf .deps/
rm -f $(libhashtable_OBJECTS)
\ No newline at end of file
This diff is collapsed.
/* from: http://en.literateprograms.org/Hash_table_%28C%29#chunk%20def:node
* Original licence Creative Commons CC0 1.0 Waiver.(http://creativecommons.org/publicdomain/zero/1.0/)
*/
#ifndef _UTILS_COLLECTION_HASH_TABLE_H_
#define _UTILS_COLLECTION_HASH_TABLE_H_
#include<stdlib.h>
#include <stdint.h>
#include <stddef.h>
typedef size_t hash_size_t;
typedef enum hashtable_return_code_e {
HASH_TABLE_OK = 0,
HASH_TABLE_INSERT_OVERWRITTEN_DATA = 1,
HASH_TABLE_KEY_NOT_EXISTS = 2,
HASH_TABLE_KEY_ALREADY_EXISTS = 3,
HASH_TABLE_BAD_PARAMETER_HASHTABLE = 4,
HASH_TABLE_SYSTEM_ERROR = 5,
HASH_TABLE_CODE_MAX
} hashtable_rc_t;
typedef struct hash_node_s {
uint64_t key;
void *data;
struct hash_node_s *next;
} hash_node_t;
typedef struct hash_table_s {
hash_size_t size;
hash_size_t num_elements;
struct hash_node_s **nodes;
hash_size_t (*hashfunc)(const uint64_t);
void (*freefunc)(void*);
} hash_table_t;
char* hashtable_rc_code2string(hashtable_rc_t rcP);
void hash_free_int_func(void* memoryP);
hash_table_t *hashtable_create (hash_size_t size, hash_size_t (*hashfunc)(const uint64_t ), void (*freefunc)(void*));
hashtable_rc_t hashtable_destroy(hash_table_t *hashtbl);
hashtable_rc_t hashtable_is_key_exists (hash_table_t *hashtbl, const uint64_t key);
hashtable_rc_t hashtable_apply_funct_on_elements (hash_table_t *hashtblP, void funct(uint64_t keyP, void* dataP, void* parameterP), void* parameterP);
hashtable_rc_t hashtable_insert (hash_table_t *hashtbl, const uint64_t key, void *data);
hashtable_rc_t hashtable_remove (hash_table_t *hashtbl, const uint64_t key);
hashtable_rc_t hashtable_get (hash_table_t *hashtbl, const uint64_t key, void **dataP);
hashtable_rc_t hashtable_resize (hash_table_t *hashtbl, hash_size_t size);
#endif
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "obj_hashtable.h"
//-------------------------------------------------------------------------------------------------------------------------------
/*
* Default hash function
* def_hashfunc() is the default used by hashtable_create() when the user didn't specify one.
* This is a simple/naive hash function which adds the key's ASCII char values. It will probably generate lots of collisions on large hash tables.
*/
static hash_size_t def_hashfunc(const void *keyP, int key_sizeP)
{
hash_size_t hash=0;
while(key_sizeP) hash^=((unsigned char*)keyP)[key_sizeP --];
return hash;
}
//-------------------------------------------------------------------------------------------------------------------------------
/*
* Initialisation
* hashtable_create() sets up the initial structure of the hash table. The user specified size will be allocated and initialized to NULL.
* The user can also specify a hash function. If the hashfunc argument is NULL, a default hash function is used.
* If an error occurred, NULL is returned. All other values in the returned obj_hash_table_t pointer should be released with hashtable_destroy().
*/
obj_hash_table_t *obj_hashtable_create(hash_size_t sizeP, hash_size_t (*hashfuncP)(const void*, int ), void (*freekeyfuncP)(void*), void (*freedatafuncP)(void*))
{
obj_hash_table_t *hashtbl;
if(!(hashtbl=malloc(sizeof(obj_hash_table_t)))) return NULL;
if(!(hashtbl->nodes=calloc(sizeP, sizeof(obj_hash_node_t*)))) {
free(hashtbl);
return NULL;
}
hashtbl->size=sizeP;
if(hashfuncP) hashtbl->hashfunc=hashfuncP;
else hashtbl->hashfunc=def_hashfunc;
if(freekeyfuncP) hashtbl->freekeyfunc=freekeyfuncP;
else hashtbl->freekeyfunc=free;
if(freedatafuncP) hashtbl->freedatafunc=freedatafuncP;
else hashtbl->freedatafunc=free;
return hashtbl;
}
//-------------------------------------------------------------------------------------------------------------------------------
/*
* Cleanup
* The hashtable_destroy() walks through the linked lists for each possible hash value, and releases the elements. It also releases the nodes array and the obj_hash_table_t.
*/
hashtable_rc_t obj_hashtable_destroy(obj_hash_table_t *hashtblP)
{
hash_size_t n;
obj_hash_node_t *node, *oldnode;
for(n=0; n<hashtblP->size; ++n) {
node=hashtblP->nodes[n];
while(node) {
oldnode=node;
node=node->next;
hashtblP->freekeyfunc(oldnode->key);
hashtblP->freedatafunc(oldnode->data);
free(oldnode);
}
}
free(hashtblP->nodes);
free(hashtblP);
return HASH_TABLE_OK;
}
//-------------------------------------------------------------------------------------------------------------------------------
hashtable_rc_t obj_hashtable_is_key_exists (obj_hash_table_t *hashtblP, void* keyP, int key_sizeP)
//-------------------------------------------------------------------------------------------------------------------------------
{
obj_hash_node_t *node;
hash_size_t hash;
if (hashtblP == NULL) {
return HASH_TABLE_BAD_PARAMETER_HASHTABLE;
}
hash=hashtblP->hashfunc(keyP, key_sizeP)%hashtblP->size;
node=hashtblP->nodes[hash];
while(node) {
if(node->key == keyP) {
return HASH_TABLE_OK;
} else if (node->key_size == key_sizeP) {
if (memcmp(node->key, keyP, key_sizeP) == 0) {
return HASH_TABLE_OK;
}
}
node=node->next;
}
return HASH_TABLE_KEY_NOT_EXISTS;
}
//-------------------------------------------------------------------------------------------------------------------------------
/*
* Adding a new element
* To make sure the hash value is not bigger than size, the result of the user provided hash function is used modulo size.
*/
hashtable_rc_t obj_hashtable_insert(obj_hash_table_t *hashtblP, void* keyP, int key_sizeP, void *dataP)
{
obj_hash_node_t *node;
hash_size_t hash;
if (hashtblP == NULL) {
return HASH_TABLE_BAD_PARAMETER_HASHTABLE;
}
hash=hashtblP->hashfunc(keyP, key_sizeP)%hashtblP->size;
node=hashtblP->nodes[hash];
while(node) {
if(node->key == keyP) {
if (node->data) {
hashtblP->freedatafunc(node->data);
}
node->data=dataP;
// waste of memory here (keyP is lost) we should free it now
return HASH_TABLE_INSERT_OVERWRITTEN_DATA;
}
node=node->next;
}
if(!(node=malloc(sizeof(obj_hash_node_t)))) return -1;
node->key=keyP;
node->data=dataP;
if (hashtblP->nodes[hash]) {
node->next=hashtblP->nodes[hash];
} else {
node->next = NULL;
}
hashtblP->nodes[hash]=node;
return HASH_TABLE_OK;
}
//-------------------------------------------------------------------------------------------------------------------------------
/*
* To remove an element from the hash table, we just search for it in the linked list for that hash value,
* and remove it if it is found. If it was not found, it is an error and -1 is returned.
*/
hashtable_rc_t obj_hashtable_remove(obj_hash_table_t *hashtblP, const void* keyP, int key_sizeP)
{
obj_hash_node_t *node, *prevnode=NULL;
hash_size_t hash;
if (hashtblP == NULL) {
return HASH_TABLE_BAD_PARAMETER_HASHTABLE;
}
hash=hashtblP->hashfunc(keyP, key_sizeP)%hashtblP->size;
node=hashtblP->nodes[hash];
while(node) {
if ((node->key == keyP) || ((node->key_size == key_sizeP) && (memcmp(node->key, keyP, key_sizeP) == 0))) {
if(prevnode) {
prevnode->next=node->next;
} else {
hashtblP->nodes[hash]=node->next;
}
hashtblP->freekeyfunc(node->key);
hashtblP->freedatafunc(node->data);
free(node);
return HASH_TABLE_OK;
}
prevnode=node;
node=node->next;
}
return HASH_TABLE_KEY_NOT_EXISTS;
}
//-------------------------------------------------------------------------------------------------------------------------------
/*
* Searching for an element is easy. We just search through the linked list for the corresponding hash value.
* NULL is returned if we didn't find it.
*/
hashtable_rc_t obj_hashtable_get(obj_hash_table_t *hashtblP, const void* keyP, int key_sizeP, void** dataP)
{
obj_hash_node_t *node;
hash_size_t hash;
if (hashtblP == NULL) {
*dataP = NULL;
return HASH_TABLE_BAD_PARAMETER_HASHTABLE;
}
hash=hashtblP->hashfunc(keyP, key_sizeP)%hashtblP->size;
node=hashtblP->nodes[hash];
while(node) {
if(node->key == keyP) {
*dataP = node->data;
return HASH_TABLE_OK;
} else if (node->key_size == key_sizeP) {
if (memcmp(node->key, keyP, key_sizeP) == 0) {
*dataP = node->data;
return HASH_TABLE_OK;
}
}
node=node->next;
}
*dataP = NULL;
return HASH_TABLE_KEY_NOT_EXISTS;
}
//-------------------------------------------------------------------------------------------------------------------------------
/*
* Function to return all keys of an object hash table
*/
hashtable_rc_t obj_hashtable_get_keys(obj_hash_table_t *hashtblP, void ** keysP, unsigned int *sizeP)
{
size_t n = 0;
obj_hash_node_t *node = NULL;
obj_hash_node_t *next = NULL;
*sizeP = 0;
keysP = calloc(hashtblP->num_elements, sizeof(void *));
if (keysP) {
for(n=0; n<hashtblP->size; ++n) {
for(node=hashtblP->nodes[n]; node; node=next) {
keysP[*sizeP++] = node->key;
next = node->next;
}
}
return HASH_TABLE_OK;
}
return HASH_TABLE_SYSTEM_ERROR;
}
//-------------------------------------------------------------------------------------------------------------------------------
/*
* Resizing
* The number of elements in a hash table is not always known when creating the table.
* If the number of elements grows too large, it will seriously reduce the performance of most hash table operations.
* If the number of elements are reduced, the hash table will waste memory. That is why we provide a function for resizing the table.
* Resizing a hash table is not as easy as a realloc(). All hash values must be recalculated and each element must be inserted into its new position.
* We create a temporary obj_hash_table_t object (newtbl) to be used while building the new hashes.
* This allows us to reuse hashtable_insert() and hashtable_remove(), when moving the elements to the new table.
* After that, we can just free the old table and copy the elements from newtbl to hashtbl.
*/
hashtable_rc_t obj_hashtable_resize(obj_hash_table_t *hashtblP, hash_size_t sizeP)
{
obj_hash_table_t newtbl;
hash_size_t n;
obj_hash_node_t *node,*next;
if (hashtblP == NULL) {
return HASH_TABLE_BAD_PARAMETER_HASHTABLE;
}
newtbl.size = sizeP;
newtbl.hashfunc = hashtblP->hashfunc;
if(!(newtbl.nodes=calloc(sizeP, sizeof(obj_hash_node_t*)))) return HASH_TABLE_SYSTEM_ERROR;
for(n=0; n<hashtblP->size; ++n) {
for(node=hashtblP->nodes[n]; node; node=next) {
next = node->next;
obj_hashtable_insert(&newtbl, node->key, node->key_size, node->data);
obj_hashtable_remove(hashtblP, node->key, node->key_size);
}
}
free(hashtblP->nodes);
hashtblP->size=newtbl.size;
hashtblP->nodes=newtbl.nodes;
return HASH_TABLE_OK;
}
#ifndef _OBJ_HASH_TABLE_H_
#define _OBJ_HASH_TABLE_H_
#include<stdlib.h>
#include <stdint.h>
#include <stddef.h>
#include "hashtable.h"
typedef size_t hash_size_t;
typedef struct obj_hash_node_s {
int key_size;
void *key;
void *data;
struct obj_hash_node_s *next;
} obj_hash_node_t;
typedef struct obj_hash_table_s {
hash_size_t size;
hash_size_t num_elements;
struct obj_hash_node_s **nodes;
hash_size_t (*hashfunc)(const void*, int);
void (*freekeyfunc)(void*);
void (*freedatafunc)(void*);
} obj_hash_table_t;
obj_hash_table_t *obj_hashtable_create (hash_size_t size, hash_size_t (*hashfunc)(const void*, int ), void (*freekeyfunc)(void*), void (*freedatafunc)(void*));
hashtable_rc_t obj_hashtable_destroy (obj_hash_table_t *hashtblP);
hashtable_rc_t obj_hashtable_is_key_exists (obj_hash_table_t *hashtblP, void* keyP, int key_sizeP);
hashtable_rc_t obj_hashtable_insert (obj_hash_table_t *hashtblP, void* keyP, int key_sizeP, void *dataP);
hashtable_rc_t obj_hashtable_remove (obj_hash_table_t *hashtblP, const void* keyP, int key_sizeP);
hashtable_rc_t obj_hashtable_get (obj_hash_table_t *hashtblP, const void* keyP, int key_sizeP, void ** dataP);
hashtable_rc_t obj_hashtable_get_keys(obj_hash_table_t *hashtblP, void ** keysP, unsigned int *sizeP);
hashtable_rc_t obj_hashtable_resize (obj_hash_table_t *hashtblP, hash_size_t sizeP);
#endif
Markdown is supported
0% or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment