Add HashMapKeys() and HashMapValues() functions for convenience.

This commit is contained in:
Jordan Bancino 2023-07-18 00:15:29 +00:00
parent b65394ab50
commit 68b644a4f2
2 changed files with 73 additions and 0 deletions

View file

@ -25,6 +25,7 @@
#include <Memory.h>
#include <Str.h>
#include <Array.h>
#include <stddef.h>
#include <string.h>
@ -399,3 +400,57 @@ HashMapIterateFree(char *key, void *value)
Free(value);
}
}
Array *
HashMapKeys(HashMap * map)
{
Array *arr;
char *key;
void *val;
if (!map)
{
return NULL;
}
arr = ArrayCreate();
if (!arr)
{
return NULL;
}
while (HashMapIterate(map, &key, &val))
{
ArrayAdd(arr, key);
}
return arr;
}
Array *
HashMapValues(HashMap *map)
{
Array *arr;
char *key;
void *val;
if (!map)
{
return NULL;
}
arr = ArrayCreate();
if (!arr)
{
return NULL;
}
while (HashMapIterate(map, &key, &val))
{
ArrayAdd(arr, val);
}
return arr;
}

View file

@ -46,6 +46,8 @@
#include <stddef.h>
#include <Array.h>
/**
* These functions operate on an opaque structure, which the caller
* has no knowledge about.
@ -164,4 +166,20 @@ extern int HashMapIterate(HashMap *, char **, void **);
extern int
HashMapIterateReentrant(HashMap *, char **, void **, size_t *);
/**
* Collect the string keys of a hash map and return them as an array.
* The returned array holds pointers to the strings stored in the
* hash map, so the strings should NOT be freed; it is sufficient to
* free the array itself. Likewise, once the hash map is freed, the
* array elements are invalid and the array should be freed.
*/
extern Array * HashMapKeys(HashMap *);
/**
* Collect the values of a hash map and return them as an array. The
* returned array holds the same pointers to the values as the hash
* map.
*/
extern Array * HashMapValues(HashMap *);
#endif /* CYTOPLASM_HASHMAP_H */