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#include "config.h"
#include "uintmap.h"
#include <stdlib.h>
#include <string.h>
extern inline void LockUIntMapRead(UIntMap *map);
extern inline void UnlockUIntMapRead(UIntMap *map);
extern inline void LockUIntMapWrite(UIntMap *map);
extern inline void UnlockUIntMapWrite(UIntMap *map);
void InitUIntMap(UIntMap *map, ALsizei limit)
{
map->array = NULL;
map->size = 0;
map->maxsize = 0;
map->limit = limit;
RWLockInit(&map->lock);
}
void ResetUIntMap(UIntMap *map)
{
WriteLock(&map->lock);
free(map->array);
map->array = NULL;
map->size = 0;
map->maxsize = 0;
WriteUnlock(&map->lock);
}
ALenum InsertUIntMapEntry(UIntMap *map, ALuint key, ALvoid *value)
{
ALsizei pos = 0;
WriteLock(&map->lock);
if(map->size > 0)
{
ALsizei low = 0;
ALsizei high = map->size - 1;
while(low < high)
{
ALsizei mid = low + (high-low)/2;
if(map->array[mid].key < key)
low = mid + 1;
else
high = mid;
}
if(map->array[low].key < key)
low++;
pos = low;
}
if(pos == map->size || map->array[pos].key != key)
{
if(map->size == map->limit)
{
WriteUnlock(&map->lock);
return AL_OUT_OF_MEMORY;
}
if(map->size == map->maxsize)
{
ALvoid *temp = NULL;
ALsizei newsize;
newsize = (map->maxsize ? (map->maxsize<<1) : 4);
if(newsize >= map->maxsize)
temp = realloc(map->array, newsize*sizeof(map->array[0]));
if(!temp)
{
WriteUnlock(&map->lock);
return AL_OUT_OF_MEMORY;
}
map->array = temp;
map->maxsize = newsize;
}
if(pos < map->size)
memmove(&map->array[pos+1], &map->array[pos],
(map->size-pos)*sizeof(map->array[0]));
map->size++;
}
map->array[pos].key = key;
map->array[pos].value = value;
WriteUnlock(&map->lock);
return AL_NO_ERROR;
}
ALvoid *RemoveUIntMapKey(UIntMap *map, ALuint key)
{
ALvoid *ptr = NULL;
WriteLock(&map->lock);
if(map->size > 0)
{
ALsizei low = 0;
ALsizei high = map->size - 1;
while(low < high)
{
ALsizei mid = low + (high-low)/2;
if(map->array[mid].key < key)
low = mid + 1;
else
high = mid;
}
if(map->array[low].key == key)
{
ptr = map->array[low].value;
if(low < map->size-1)
memmove(&map->array[low], &map->array[low+1],
(map->size-1-low)*sizeof(map->array[0]));
map->size--;
}
}
WriteUnlock(&map->lock);
return ptr;
}
ALvoid *LookupUIntMapKey(UIntMap *map, ALuint key)
{
ALvoid *ptr = NULL;
ReadLock(&map->lock);
if(map->size > 0)
{
ALsizei low = 0;
ALsizei high = map->size - 1;
while(low < high)
{
ALsizei mid = low + (high-low)/2;
if(map->array[mid].key < key)
low = mid + 1;
else
high = mid;
}
if(map->array[low].key == key)
ptr = map->array[low].value;
}
ReadUnlock(&map->lock);
return ptr;
}
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