Libecoli 0.4.0
Extensible COmmand LIne library
 
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Simple hash table API (string keys) More...

Typedefs

typedef void(* ec_dict_elt_free_t) (void *)
 

Functions

struct ec_dict * ec_dict (void)
 
void * ec_dict_get (const struct ec_dict *dict, const char *key)
 
bool ec_dict_has_key (const struct ec_dict *dict, const char *key)
 
int ec_dict_del (struct ec_dict *dict, const char *key)
 
int ec_dict_set (struct ec_dict *dict, const char *key, void *val, ec_dict_elt_free_t free_cb)
 
void ec_dict_free (struct ec_dict *dict)
 
size_t ec_dict_len (const struct ec_dict *dict)
 
struct ec_dictec_dict_dup (const struct ec_dict *dict)
 
void ec_dict_dump (FILE *out, const struct ec_dict *dict)
 
struct ec_dict_elt_ref * ec_dict_iter (const struct ec_dict *dict)
 
struct ec_dict_elt_ref * ec_dict_iter_next (struct ec_dict_elt_ref *iter)
 
const char * ec_dict_iter_get_key (const struct ec_dict_elt_ref *iter)
 
void * ec_dict_iter_get_val (const struct ec_dict_elt_ref *iter)
 

Detailed Description

Simple hash table API (string keys)

This file provides functions to store objects in hash tables, using strings as keys.

Typedef Documentation

◆ ec_dict_elt_free_t

typedef void(* ec_dict_elt_free_t) (void *)

Definition at line 21 of file ecoli_dict.h.

Function Documentation

◆ ec_dict()

struct ec_dict * ec_dict ( void )

Create a hash table.

Returns
The hash table, or NULL on error (errno is set).

◆ ec_dict_get()

void * ec_dict_get ( const struct ec_dict * dict,
const char * key )

Get a value from the hash table.

Parameters
dictThe hash table.
keyThe key string.
Returns
The element if it is found, or NULL on error (errno is set). In case of success but the element is NULL, errno is set to 0.

◆ ec_dict_has_key()

bool ec_dict_has_key ( const struct ec_dict * dict,
const char * key )

Check if the hash table contains this key.

Parameters
dictThe hash table.
keyThe key string.
Returns
true if it contains the key, else false.

◆ ec_dict_del()

int ec_dict_del ( struct ec_dict * dict,
const char * key )

Delete an object from the hash table.

Parameters
dictThe hash table.
keyThe key string.
Returns
0 on success, or -1 on error (errno is set).

◆ ec_dict_set()

int ec_dict_set ( struct ec_dict * dict,
const char * key,
void * val,
ec_dict_elt_free_t free_cb )

Add/replace an object in the hash table.

Parameters
dictThe hash table.
keyThe key string.
valThe pointer to be saved in the hash table.
free_cbAn optional pointer to a destructor function called when an object is destroyed (ec_dict_del() or ec_dict_free()).
Returns
0 on success, or -1 on error (errno is set). On error, the passed value is freed (free_cb(val) is called).

◆ ec_dict_free()

void ec_dict_free ( struct ec_dict * dict)

Free a hash table an all its objects.

Parameters
dictThe hash table.

◆ ec_dict_len()

size_t ec_dict_len ( const struct ec_dict * dict)

Get the length of a hash table.

Parameters
dictThe hash table.
Returns
The length of the hash table.

◆ ec_dict_dup()

struct ec_dict * ec_dict_dup ( const struct ec_dict * dict)

Duplicate a hash table

A reference counter is shared between the clones of hash tables so that the objects are freed only when the last reference is destroyed.

Parameters
dictThe hash table.
Returns
The duplicated hash table, or NULL on error (errno is set).

◆ ec_dict_dump()

void ec_dict_dump ( FILE * out,
const struct ec_dict * dict )

Dump a hash table.

Parameters
outThe stream where the dump is sent.
dictThe hash table.

◆ ec_dict_iter()

struct ec_dict_elt_ref * ec_dict_iter ( const struct ec_dict * dict)

Iterate the elements in the hash table.

The typical usage is as below:

// dump elements for (iter = ec_dict_iter(dict); iter != NULL; iter = ec_dict_iter_next(iter)) { printf(" %s: %p\n", ec_dict_iter_get_key(iter), ec_dict_iter_get_val(iter)); }

Parameters
dictThe hash table.
Returns
An iterator element, or NULL if the dict is empty.

◆ ec_dict_iter_next()

struct ec_dict_elt_ref * ec_dict_iter_next ( struct ec_dict_elt_ref * iter)

Make the iterator point to the next element in the hash table.

Parameters
iterThe hash table iterator.
Returns
An iterator element, or NULL there is no more element.

◆ ec_dict_iter_get_key()

const char * ec_dict_iter_get_key ( const struct ec_dict_elt_ref * iter)

Get a pointer to the key of the current element.

Parameters
iterThe hash table iterator.
Returns
The current element key, or NULL if the iterator points to an invalid element.

◆ ec_dict_iter_get_val()

void * ec_dict_iter_get_val ( const struct ec_dict_elt_ref * iter)

Get the value of the current element.

Parameters
iterThe hash table iterator.
Returns
The current element value, or NULL if the iterator points to an invalid element.