#ifndef STON_FUNC
#define STON_FUNC STON_FUNC_STATIC STON_FUNC_INLINE
#endif //STON_FUNC
-#ifndef STON_NOSTDIO
+#ifdef STON_HT_FREAD
#include <stdio.h>
-#include <string.h> //memcpy
+#include <errno.h>
#include <alloca.h>
-#endif //STON_NOSTDIO
+STON_FUNC_STATIC
+STON_FUNC_NOINLINE
+ston_ht ston_ht32_fread(FILE*,long,void*(*)(size_t));
+#else
+#include <stddef.h>
+#endif //STON_HT_FREAD
#include <stdint.h>
+#include <string.h> //mem*
/* STON Hashtable Structure
Hashtables are stored as dynamically sized two dimensional arrays
*/
typedef struct ston_ht_header_t
{ uint16_t ht_columns;
uint8_t ht_2pow, ht_flags;
-}* ston_ht;
+}ston_ht_h,* ston_ht;
STON_FUNC
-size_t ston_up2pow(size_t);
-STON_FUNC_STATIC
-STON_FUNC_NOINLINE
-ston_ht ston_ht32_fread(FILE*,long,void*(*)(size_t));
+uint32_t ston_up2pow(uint32_t);
+STON_FUNC
+uint8_t ston_trailing0(uint32_t);
STON_FUNC
-ston_ht ston_ht32_create(uint16_t,size_t,uint8_t,void*(*)(size_t));
+ston_ht ston_ht32_create(uint16_t,uint8_t,uint8_t,void*(*)(size_t));
STON_FUNC
uint32_t* ston_ht32_row(ston_ht,uint32_t);
STON_FUNC
uint32_t ston_ht32_insert(ston_ht,uint32_t,uint16_t,uint32_t);
+STON_FUNC
+size_t ston_ht32_insertx(ston_ht,uint32_t,uint32_t*,size_t,size_t);
-#define ston_ht32_new(_COL,_N,_F,_FN) ston_ht32_create(_COLS,ston_up2pow(_N << 1),_F,_FN)
-#define ston_ht32_entry(_HT,_KEY,_COL) (ston_ht32_row(_HT,_KEY) + _COL)
-#define ston_ht32_insertx(_HT,_KEY,_COL,_VAL) *ston_ht32_entry(_HT,_KEY,_COL) = _VAL
+#define ston_ht32_new(_COL,_N,_F,_FN) (ston_ht32_create(_COL,ston_trailing0(ston_up2pow(_N << 1)),_F,_FN))
+#define ston_ht32_entry(_HT,_KEY,_COL) (ston_ht32_row(_HT,_KEY) + _COL)
#define ston_ht_size(_HT) ((_HT)->ht_columns << (_HT)->ht_2pow)
#define ston_ht_rows(_HT) (0x1 << (_HT)->ht_2pow)
#define ston_ht_cols(_HT) ((_HT)->ht_columns)
-#define ston_ht_start(_HT) (((uint8_t*)(_HT)) + sizeof(*(_HT)))
+#define ston_ht_start(_HT) ((uint8_t*)((_HT) + 1))
#define ston_ht_keyrow(_HT,_KEY) ((_KEY) & (ston_ht_rows(ht) - 1))
#define ston_ht32_start(_HT) ((uint32_t*)ston_ht_start(_HT))
#define ston_ht32_end(_HT) (ston_ht32_start(_HT) + ston_ht_size(_HT))
/** @see http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2 */
STON_FUNC
-size_t ston_up2pow
-( size_t val )
+uint32_t ston_up2pow
+( uint32_t val )
{ val = (val << 1) - 1;
val |= val >> 1;
val |= val >> 2;
return ++val;
}
+/** @see https://graphics.stanford.edu/~seander/bithacks.html#ZerosOnRightParallel */
+STON_FUNC
+uint8_t ston_trailing0
+( uint32_t v )
+{ uint8_t c = 32;
+ v &= -(int32_t)v;
+ if (v) c--;
+ if (v & 0x0000FFFF) c -= 16;
+ if (v & 0x00FF00FF) c -= 8;
+ if (v & 0x0F0F0F0F) c -= 4;
+ if (v & 0x33333333) c -= 2;
+ if (v & 0x55555555) c -= 1;
+ return c;
+}
+
/* Creates a new hash table, provided a memory allocation function that takes a
single size_t bytes, a column count, and a row count which determines the
size of the table.
STON_FUNC
ston_ht ston_ht32_create
( uint16_t ht_columns,
- size_t ht_rows,
+ uint8_t ht_2pow,
uint8_t ht_flags,
void* (*alloc_fn)(size_t)
)
-{ size_t ht_size = ht_rows * ht_columns * sizeof(uint32_t);
- ston_ht ht = (ston_ht) alloc_fn(sizeof(struct ston_ht_header_t) + ht_size);
+{ size_t ht_bytes = (ht_columns << ht_2pow) * sizeof(uint32_t);
+ ston_ht ht = (ston_ht) alloc_fn(sizeof(ston_ht_h) + ht_bytes);
if (ht != NULL)
- { for (ht->ht_2pow = 0; ht_size; ht->ht_2pow++)
- ht_size = ht_size >> 1;
- ht->ht_columns = ht_columns;
+ { ht->ht_columns = ht_columns;
+ ht->ht_2pow = ht_2pow;
ht->ht_flags = ht_flags;
+ memset(ht + 1, 0, ht_bytes);
}
return ht;
}
-#ifndef STON_NO_STDIO
+#ifdef STON_HT_FREAD
/* Reads a 32-bit hash table out of the provided file at the provide fpos, into
a buffer allocated by alloc_fn. Memory is allocated to the stack until the
entire structure is verified, and all file operations are finished.
Returns NULL with properly set errno on failure.
*/
-STON_FUNC_STATIC
-STON_FUNC_NOINLINE
ston_ht ston_ht32_fread
( FILE* file,
long fpos,
populated:
if (row[0] == key)
goto write_position;
- if (row < row_end)
+ if (row + ht_cols < row_end)
row += ht_cols;
else if (looped)
return NULL;
return old_value;
}
+/* Inserts a row of units into a hashtable, starting with the specified column.
+ Returns the number of elements that were written. This function will not
+ overflow internal buffers, but will return a short count (lower than the
+ provided 'units') when truncation of source data occurs. */
+STON_FUNC
+size_t
+ston_ht32_insertx
+( struct ston_ht_header_t* ht,
+ uint32_t key,
+ uint32_t* data_src,
+ size_t start_column,
+ size_t units
+)
+{ uint32_t* data_row = ston_ht32_row(ht,key);
+ uint32_t* data_limit = data_row + ston_ht_cols(ht);
+ uint32_t* data_trg = data_row + start_column;
+ if (data_row == NULL)
+ return 0;
+ while (units-- && data_trg < data_limit)
+ *data_trg++ = *data_src++;
+ return (size_t)(data_trg - data_row);
+}
+
+
#ifndef STON_DHT_SIZE
#define STON_DHT_SIZE 4096
#endif
external allocation.
*/
typedef struct ston_dht_header_t
-{ uint16_t ht_columns;
- uint8_t ht_2pow, ht_flags;
- void* (*ht_alloc)(size_t);
- void (*ht_free)(void*);
- void** page_head;
+{ uint16_t columns;
+ uint8_t unit_bytes;
+ uint8_t start_depth;
+}ston_dht_h;
+
+typedef struct ston_dht_t
+{ ston_dht_h header;
+ void* pages[sizeof(void*) * 8];
+ void* (*ht_alloc)(size_t);
+ void (*ht_free)(void*);
}* ston_dht;
-#define STON_DHT_HEADERSIZE (sizeof(struct ston_dht_header_t))
STON_FUNC
-ston_dht ston_dht32_create(uint16_t,size_t,uint8_t,void*(*)(size_t),void(*)(void*));
+ston_dht ston_dht_create(uint16_t,uint8_t,uint8_t,void*(*)(size_t),void(*)(void*));
STON_FUNC
uint32_t* ston_dht32_row(ston_dht,uint32_t);
STON_FUNC
uint32_t ston_dht32_insert(ston_dht,uint32_t,uint16_t,uint32_t);
STON_FUNC
-void ston_dht32_free(ston_dht);
+size_t ston_dht32_insertx(ston_dht,uint32_t,uint32_t*,uint16_t,size_t);
+STON_FUNC
+ston_dht ston_dht_free(ston_dht);
+
+#define ston_dht_units(_HT,_DEPTH) ((_HT)->header.columns << _DEPTH)
+#define ston_dht_bytes(_HT,_DEPTH) (ston_dht_units(_HT,_DEPTH) * (_HT)->header.unit_bytes)
+#define ston_dht_new(_COL,_ALOC,_FRE) (ston_dht_create(_COL,3,sizeof(int),_ALOC,_FRE))
+#define ston_dht_sized(_COL,_N,_ALOC,_FRE) (ston_dht_create(_COL,ston_trailing0(ston_up2pow(_N),sizeof(int),_ALOC,_FRE)))
+#define ston_dht32_entry(_HT,_KEY,_COL) (ston_dht32_row(_HT,_KEY) + _COL)
+#define ston_dht32_new(_COL,_ALOC,_FRE) (ston_dht_create(_COL,0,sizeof(uint32_t),_ALOC,_FRE))
+#define ston_dht32_sized(_COL,_N,_ALOC,_FRE) (ston_dht_create(_COL,ston_trailing0(ston_up2pow(_N)),sizeof(uint32_t),_ALOC,_FRE))
-#define ston_dht32_new(_COL,_N,_F,_FN) ston_dht32_create(_COLS,ston_up2pow(_N << 1),_F,_FN)
-#define ston_dht32_entry(_HT,_KEY,_COL) (ston_dht32_row(_HT,_KEY) + _COL)
-#define ston_dht32_insertx(_HT,_KEY,_COL,_VAL) *ston_dht32_col(_HT,_KEY,_COL) = _VAL
-#define ston_dht_size(_HT) (ston_ht_size(_HT))
-#define ston_dht_rows(_HT) (ston_ht_rows(_HT))
-#define ston_dht_cols(_HT) (ston_ht_cols(_HT))
-#define ston_dht_keyrow(_HT,_KEY) (ston_ht_keyrow(_HT,_KEY))
-#define ston_dht_pagestart(_HT) ((void**)(((uint8_t*)(_HT)) + STON_DHT_HEADERSIZE))
-#define ston_dht_pagehead(_HT) ((_HT)->page_head)
-#define ston_dht_pagemax(_HT) ((void**)((uint8_t*)(_HT) + STON_DHT_SIZE - sizeof(void**)))
-#define ston_dht_start(_HT,_DEPTH) ((uint8_t*)*(ston_dht_pagestart(_HT) + _DEPTH))
-#define ston_dht32_start(_HT,_DEPTH) ((uint32_t*)ston_dht_start(_HT,_DEPTH))
-#define ston_dht32_end(_HT,_DEPTH) (ston_ht32_start(_HT,_DEPTH) + ston_ht_size(_HT))
-#define ston_dht32_size(_HT) (ston_dht_size(_HT) * sizeof(uint32_t))
-#define ston_dht32_pagepush(_HT) ((*(++((_HT)->page_head)) = (_HT)->ht_alloc(ston_dht32_size(_HT))))
-#define ston_dht32_pagepop(_HT) ((_HT)->ht_free((_HT)->page_head--))
/* Creates a new bucketted hash table, provided a memory allocation function
that takes a single size_t bytes, a memory free function, a column count, and
a row count which determines the size of the buckets.
*/
STON_FUNC
-ston_dht ston_dht32_create
-( uint16_t ht_columns,
- size_t ht_rows,
- uint8_t ht_flags,
- void* (*ht_alloc)(size_t),
- void (*ht_free)(void*)
+ston_dht ston_dht_create
+( uint16_t columns,
+ uint8_t start_depth,
+ uint8_t unit_bytes,
+ void* (*ht_alloc)(size_t),
+ void (*ht_free)(void*)
)
-{ size_t ht_size = ht_rows * ht_columns * sizeof(uint32_t);
- ston_dht ht = (ston_dht) ht_alloc(STON_DHT_SIZE);
+{ ston_dht ht = (ston_dht) ht_alloc(sizeof(struct ston_dht_t));
if (ht != NULL)
- { for (ht->ht_2pow = 0; ht_size; ht->ht_2pow++)
- ht_size = ht_size >> 1;
- ht->ht_columns = ht_columns;
- ht->ht_flags = ht_flags;
+ { ht->header.columns = columns;
+ ht->header.start_depth = start_depth;
+ ht->header.unit_bytes = unit_bytes;
+ memset(ht->pages, 0, sizeof(void*) * sizeof(void*) * 8);
+ ht->pages[start_depth] = ht_alloc(ston_dht_bytes(ht, start_depth));
ht->ht_alloc = ht_alloc;
ht->ht_free = ht_free;
- ht->page_head = ston_dht_pagestart(ht);
- if ((*(ht->page_head) = ht->ht_alloc(ston_dht_size(ht))) == NULL)
+ if (ht->pages[start_depth] == NULL && ht_free != NULL)
ht_free(ht);
+ else
+ memset(ht->pages[start_depth], 0, ston_dht_bytes(ht, start_depth));
}
return ht;
}
*/
STON_FUNC
uint32_t* ston_dht32_row
-( struct ston_dht_header_t* ht,
- uint32_t key
+( struct ston_dht_t* ht,
+ uint32_t key
)
-{ uint16_t ht_cols = ston_dht_cols(ht);
- size_t row_number = ston_dht_keyrow(ht,key);
- uint32_t** page = (uint32_t**)ston_dht_pagestart(ht);
- uint32_t** pagemax = (uint32_t**)ston_dht_pagemax(ht);
- uint8_t loop_x = 0;
- uint8_t loop_y = 0;
- uint32_t* row,* row_end;
+{ uint16_t columns = ht->header.columns;
+ uint8_t depth = ht->header.start_depth;
+ uint32_t mask = ((0x1 << depth) - 1) >> 1;
+ void* page;
+ uint32_t* row;
+ uint32_t row_key;
next_page:
- row = *page + (row_number * ht_cols);
- row_end = *page + (ston_dht_size(ht) - 1);
- next_row:
- if (row[0] != 0)
- goto populated;
- write_position:
- row[0] = key;
- return row;
- populated:
- if (row[0] == key)
- goto write_position;
- if (!loop_x)
- { if (page < pagemax)
- { if (page == (uint32_t**)ston_dht_pagehead(ht))
- if (ston_dht32_pagepush(ht) == NULL)
- { ston_dht32_free(ht);
- return NULL;
- }
- ++page;
- goto next_row;
- }
- loop_x = 1;
- row_number = (row_number + 1) % ston_dht_rows(ht);
- page = (uint32_t**)ston_dht_pagestart(ht);
- goto next_row;
- }
- if (row < row_end)
- { row += ht_cols;
- goto next_row;
- }
- else if (!loop_y)
- { loop_y = 1;
- row = *page;
- goto next_row;
+ if (ht->pages[depth] == NULL)
+ { ht->pages[depth] = ht->ht_alloc(ston_dht_bytes(ht, depth));
+ if (ht->pages[depth] == NULL)
+ return NULL;
+ memset(ht->pages[depth], 0, ston_dht_bytes(ht, depth));
}
- if (page < pagemax)
- { loop_y = 0;
- page++;
- goto next_page;
+ page = ht->pages[depth];
+ row = (uint32_t*)page + ((key & mask) * columns);
+ row_key = *row;
+ if (row_key == key || row_key == 0)
+ { row[0] = key;
+ return row;
}
- return NULL;
+ depth++;
+ mask = (mask << 1) | 0x1;
+ goto next_page;
}
/* Inserts a value into a hashtable at the specified column, returning the
previous value */
STON_FUNC
uint32_t ston_dht32_insert
-( struct ston_dht_header_t* ht,
- uint32_t key,
- uint16_t column,
- uint32_t value
+( struct ston_dht_t* ht,
+ uint32_t key,
+ uint16_t column,
+ uint32_t value
)
{ uint32_t* value_location, old_value;
value_location = ston_dht32_entry(ht,key,column);
return old_value;
}
+/* Insert multiple values, returning the number of bytes written */
+STON_FUNC
+size_t
+ston_dht32_insertx
+( struct ston_dht_t* ht,
+ uint32_t key,
+ uint32_t* data_src,
+ uint16_t start_column,
+ size_t units
+)
+{ uint32_t* data_row = ston_dht32_row(ht,key);
+ uint32_t* data_limit = data_row + ht->header.columns;
+ uint32_t* data_trg = data_row + start_column;
+ if (data_row == NULL)
+ return 0;
+ while (units-- && data_trg < data_limit)
+ *data_trg++ = *data_src++;
+ return (size_t)(data_trg - data_row);
+}
+
/* Free the dynamic hash table */
STON_FUNC
-void ston_dht32_free
-( struct ston_dht_header_t* ht )
+struct ston_dht_t* ston_dht_free
+( struct ston_dht_t* ht )
{ void (*ht_free)(void*) = ht->ht_free;
+ uint8_t depth = ht->header.start_depth;
+ void** pages = ht->pages;
if (ht_free != NULL)
- { while (ht->page_head >= ston_dht_pagestart(ht))
- ht_free(ht->page_head--);
+ { while (pages[depth] != NULL)
+ ht_free(pages[depth++]);
ht_free(ht);
+ return NULL;
}
+ return ht;
}
+
#endif //_STON_HT_H_
projects / henge / apc.git / blobdiff