It may be used out of the box with key and value of type CStr (which is char * - zero-terminated string). Once it instantiated in some file using CDICT_INST definition:
#define CDICT_INST
#include "cdict.h"It may be then declared just using #include:
#include "cdict.h"
int main() {
CDict_CStr_CStr dict;
if (!cdict_CStr_CStr_init(&dict)) {
printf("CDict returned error #%d", dict.error_code);
return 0;
}
cdict_CStr_CStr_add_vv(&dict, "key_a", "value_a", CDICT_REPLACE_EXIST);
printf("[key_a] = \"%s\"\n", cdict_CStr_CStr_get_v(&dict, "key_a"));
}If you want to create a dictionary for other key types you should provide your own keys hashing and comparsion functions, in such case the instantiation of the library will look like this:
#define CDICT_INST
#define CDICT_KEY_T MyType
#define CDICT_HASH_FN(pkey) my_hash(pkey)
#define CDICT_CMP_FN(pkey0, pkey1) my_cmp(pkey0, pkey1)
#include "cdict.h"
int my_cmp(MyType *pkey0, MyType *pkey1) {
// Return `whatever_negative` if `key0 < key1`, `0` if `key0 == key1` and `whatever_positive` if `key0 > key1`
}
unsigned long my_hash(MyType *key) {
// Return the hash of the key
}Then to use the new dictionary you only need to define key type before the header inclusion:
#define CDICT_KEY_T MyType
#include "cdict.h"
// ...
CDict_MyType_CStr dict;
cdict_MyType_CStr_init(&dict);
// ...If you want to specify the type of values - just define the type:
#define CDICT_VAL_T MyValueTypeAnd so on.
Every single used dependency may be redefined:
#define CDICT_ASSERT_FN(x) my_assert(x);May define user data to be used in overriden functions (for example - custom allocators):
#define CDICT_USER_DATA_T UserData
#define CDICT_HASHTAB_ITEM_ALLOC_FN(cdict, size) item_alloc(cdict, size)
#define CDICT_HASHTAB_ITEM_FREE_FN(cdict, ptr) item_free(cdict, ptr)
#define CDICT_HASHTAB_ALLOC_FN(cdict, size) hashtab_alloc(cdict, size)
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