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binn.c
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binn.c
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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <memory.h>
#include "binn.h"
#define UNUSED(x) (void)(x)
#define round(dbl) dbl >= 0.0 ? (int)(dbl + 0.5) : ((dbl - (double)(int)dbl) <= -0.5 ? (int)dbl : (int)(dbl - 0.5))
// magic number: 0x1F 0xb1 0x22 0x1F => 0x1FB1221F or 0x1F22B11F
// because the BINN_STORAGE_NOBYTES (binary 000) may not have so many sub-types (BINN_STORAGE_HAS_MORE = 0x10)
#define BINN_MAGIC 0x1F22B11F
#define MAX_BINN_HEADER 9 // [1:type][4:size][4:count]
#define MIN_BINN_SIZE 3 // [1:type][1:size][1:count]
#define CHUNK_SIZE 256 // 1024
#define BINN_STRUCT 1
#define BINN_BUFFER 2
void* (*malloc_fn)(size_t len) = 0;
void* (*realloc_fn)(void *ptr, size_t len) = 0;
void (*free_fn)(void *ptr) = 0;
/***************************************************************************/
#if defined(__APPLE__) || defined(_WIN32)
#define __BIG_ENDIAN 0x1000
#define __LITTLE_ENDIAN 0x0001
#define __BYTE_ORDER __LITTLE_ENDIAN
#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
#include <sys/endian.h>
#define __BIG_ENDIAN BIG_ENDIAN
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#define __BYTE_ORDER BYTE_ORDER
#elif defined(_AIX)
#include <sys/machine.h>
#define __BIG_ENDIAN BIG_ENDIAN
#define __LITTLE_ENDIAN LITTLE_ENDIAN
#define __BYTE_ORDER BYTE_ORDER
#else
#include <endian.h>
#endif
#ifndef __BYTE_ORDER
#error "__BYTE_ORDER not defined"
#endif
#ifndef __BIG_ENDIAN
#error "__BIG_ENDIAN not defined"
#endif
#ifndef __LITTLE_ENDIAN
#error "__LITTLE_ENDIAN not defined"
#endif
#if __BIG_ENDIAN == __LITTLE_ENDIAN
#error "__BIG_ENDIAN == __LITTLE_ENDIAN"
#endif
BINN_PRIVATE unsigned short tobe16(unsigned short input) {
#if __BYTE_ORDER == __BIG_ENDIAN
return input;
#else
unsigned short result;
unsigned char *source = (unsigned char *) &input;
unsigned char *dest = (unsigned char *) &result;
dest[0] = source[1];
dest[1] = source[0];
return result;
#endif
}
BINN_PRIVATE unsigned int tobe32(unsigned int input) {
#if __BYTE_ORDER == __BIG_ENDIAN
return input;
#else
unsigned int result;
unsigned char *source = (unsigned char *) &input;
unsigned char *dest = (unsigned char *) &result;
dest[0] = source[3];
dest[1] = source[2];
dest[2] = source[1];
dest[3] = source[0];
return result;
#endif
}
BINN_PRIVATE uint64 tobe64(uint64 input) {
#if __BYTE_ORDER == __BIG_ENDIAN
return input;
#else
uint64 result;
unsigned char *source = (unsigned char *) &input;
unsigned char *dest = (unsigned char *) &result;
int i;
for (i=0; i < 8; i++) {
dest[i] = source[7-i];
}
return result;
#endif
}
#define frombe16 tobe16
#define frombe32 tobe32
#define frombe64 tobe64
/***************************************************************************/
#ifndef WIN32
#define stricmp strcasecmp
#define strnicmp strncasecmp
#endif
/***************************************************************************/
void APIENTRY binn_set_alloc_functions(void* (*new_malloc)(size_t), void* (*new_realloc)(void*,size_t), void (*new_free)(void*)) {
malloc_fn = new_malloc;
realloc_fn = new_realloc;
free_fn = new_free;
}
/***************************************************************************/
BINN_PRIVATE void check_alloc_functions() {
if (malloc_fn == 0) malloc_fn = &malloc;
if (realloc_fn == 0) realloc_fn = &realloc;
if (free_fn == 0) free_fn = &free;
}
/***************************************************************************/
BINN_PRIVATE void * binn_malloc(int size) {
check_alloc_functions();
return malloc_fn(size);
}
/***************************************************************************/
BINN_PRIVATE void * binn_memdup(void *src, int size) {
void *dest;
if (src == NULL || size <= 0) return NULL;
dest = binn_malloc(size);
if (dest == NULL) return NULL;
memcpy(dest, src, size);
return dest;
}
/***************************************************************************/
BINN_PRIVATE size_t strlen2(char *str) {
if (str == NULL) return 0;
return strlen(str);
}
/***************************************************************************/
int APIENTRY binn_create_type(int storage_type, int data_type_index) {
if (data_type_index < 0) return -1;
if ((storage_type < BINN_STORAGE_MIN) || (storage_type > BINN_STORAGE_MAX)) return -1;
if (data_type_index < 16)
return storage_type | data_type_index;
else if (data_type_index < 4096) {
storage_type |= BINN_STORAGE_HAS_MORE;
storage_type <<= 8;
data_type_index >>= 4;
return storage_type | data_type_index;
} else
return -1;
}
/***************************************************************************/
BOOL APIENTRY binn_get_type_info(int long_type, int *pstorage_type, int *pextra_type) {
int storage_type, extra_type;
BOOL retval=TRUE;
again:
if (long_type < 0) {
goto loc_invalid;
} else if (long_type <= 0xff) {
storage_type = long_type & BINN_STORAGE_MASK;
extra_type = long_type & BINN_TYPE_MASK;
} else if (long_type <= 0xffff) {
storage_type = long_type & BINN_STORAGE_MASK16;
storage_type >>= 8;
extra_type = long_type & BINN_TYPE_MASK16;
extra_type >>= 4;
} else if (long_type & BINN_STORAGE_VIRTUAL) {
//storage_type = BINN_STORAGE_VIRTUAL;
//extra_type = xxx;
long_type &= 0xffff;
goto again;
} else {
loc_invalid:
storage_type = -1;
extra_type = -1;
retval = FALSE;
}
if (pstorage_type) *pstorage_type = storage_type;
if (pextra_type) *pextra_type = extra_type;
return retval;
}
/***************************************************************************/
BOOL APIENTRY binn_create(binn *item, int type, int size, void *pointer) {
BOOL retval=FALSE;
switch (type) {
case BINN_LIST:
case BINN_MAP:
case BINN_OBJECT:
break;
default:
goto loc_exit;
}
if ((item == NULL) || (size < 0)) goto loc_exit;
if (size < MIN_BINN_SIZE) {
if (pointer) goto loc_exit;
else size = 0;
}
memset(item, 0, sizeof(binn));
if (pointer) {
item->pre_allocated = TRUE;
item->pbuf = pointer;
item->alloc_size = size;
} else {
item->pre_allocated = FALSE;
if (size == 0) size = CHUNK_SIZE;
pointer = binn_malloc(size);
if (pointer == 0) return INVALID_BINN;
item->pbuf = pointer;
item->alloc_size = size;
}
item->header = BINN_MAGIC;
//item->allocated = FALSE; -- already zeroed
item->writable = TRUE;
item->used_size = MAX_BINN_HEADER; // save space for the header
item->type = type;
//item->count = 0; -- already zeroed
item->dirty = TRUE; // the header is not written to the buffer
retval = TRUE;
loc_exit:
return retval;
}
/***************************************************************************/
binn * APIENTRY binn_new(int type, int size, void *pointer) {
binn *item;
item = (binn*) binn_malloc(sizeof(binn));
if (binn_create(item, type, size, pointer) == FALSE) {
free_fn(item);
return NULL;
}
item->allocated = TRUE;
return item;
}
/*************************************************************************************/
BOOL APIENTRY binn_create_list(binn *list) {
return binn_create(list, BINN_LIST, 0, NULL);
}
/*************************************************************************************/
BOOL APIENTRY binn_create_map(binn *map) {
return binn_create(map, BINN_MAP, 0, NULL);
}
/*************************************************************************************/
BOOL APIENTRY binn_create_object(binn *object) {
return binn_create(object, BINN_OBJECT, 0, NULL);
}
/***************************************************************************/
binn * APIENTRY binn_list() {
return binn_new(BINN_LIST, 0, 0);
}
/***************************************************************************/
binn * APIENTRY binn_map() {
return binn_new(BINN_MAP, 0, 0);
}
/***************************************************************************/
binn * APIENTRY binn_object() {
return binn_new(BINN_OBJECT, 0, 0);
}
/*************************************************************************************/
BOOL APIENTRY binn_load(void *data, binn *value) {
if ((data == NULL) || (value == NULL)) return FALSE;
memset(value, 0, sizeof(binn));
value->header = BINN_MAGIC;
//value->allocated = FALSE; -- already zeroed
//value->writable = FALSE;
if (binn_is_valid(data, &value->type, &value->count, &value->size) == FALSE) return FALSE;
value->ptr = data;
return TRUE;
}
/*************************************************************************************/
binn * APIENTRY binn_open(void *data) {
binn *item;
item = (binn*) binn_malloc(sizeof(binn));
if (binn_load(data, item) == FALSE) {
free_fn(item);
return NULL;
}
item->allocated = TRUE;
return item;
}
/***************************************************************************/
BINN_PRIVATE int binn_get_ptr_type(void *ptr) {
if (ptr == NULL) return 0;
switch (*(unsigned int *)ptr) {
case BINN_MAGIC:
return BINN_STRUCT;
default:
return BINN_BUFFER;
}
}
/***************************************************************************/
BOOL APIENTRY binn_is_struct(void *ptr) {
if (ptr == NULL) return FALSE;
if ((*(unsigned int *)ptr) == BINN_MAGIC) {
return TRUE;
} else {
return FALSE;
}
}
/***************************************************************************/
BINN_PRIVATE int CalcAllocation(int needed_size, int alloc_size) {
int calc_size;
calc_size = alloc_size;
while (calc_size < needed_size) {
calc_size <<= 1; // same as *= 2
//calc_size += CHUNK_SIZE; -- this is slower than the above line, because there are more reallocations
}
return calc_size;
}
/***************************************************************************/
BINN_PRIVATE BOOL CheckAllocation(binn *item, int add_size) {
int alloc_size;
void *ptr;
if (item->used_size + add_size > item->alloc_size) {
if (item->pre_allocated) return FALSE;
alloc_size = CalcAllocation(item->used_size + add_size, item->alloc_size);
ptr = realloc_fn(item->pbuf, alloc_size);
if (ptr == NULL) return FALSE;
item->pbuf = ptr;
item->alloc_size = alloc_size;
}
return TRUE;
}
/***************************************************************************/
#if __BYTE_ORDER == __BIG_ENDIAN
BINN_PRIVATE int get_storage_size(int storage_type) {
switch (storage_type) {
case BINN_STORAGE_NOBYTES:
return 0;
case BINN_STORAGE_BYTE:
return 1;
case BINN_STORAGE_WORD:
return 2;
case BINN_STORAGE_DWORD:
return 4;
case BINN_STORAGE_QWORD:
return 8;
default:
return 0;
}
}
#endif
/***************************************************************************/
BINN_PRIVATE unsigned char * AdvanceDataPos(unsigned char *p, unsigned char *plimit) {
unsigned char byte;
int storage_type, DataSize;
if (p > plimit) return 0;
byte = *p; p++;
storage_type = byte & BINN_STORAGE_MASK;
if (byte & BINN_STORAGE_HAS_MORE) p++;
switch (storage_type) {
case BINN_STORAGE_NOBYTES:
//p += 0;
break;
case BINN_STORAGE_BYTE:
p ++;
break;
case BINN_STORAGE_WORD:
p += 2;
break;
case BINN_STORAGE_DWORD:
p += 4;
break;
case BINN_STORAGE_QWORD:
p += 8;
break;
case BINN_STORAGE_BLOB:
if (p + sizeof(int) - 1 > plimit) return 0;
DataSize = *((int *)p);
DataSize = frombe32(DataSize);
p += 4 + DataSize;
break;
case BINN_STORAGE_CONTAINER:
if (p > plimit) return 0;
DataSize = *((unsigned char*)p);
if (DataSize & 0x80) {
if (p + sizeof(int) - 1 > plimit) return 0;
DataSize = *((int*)p);
DataSize = frombe32(DataSize);
DataSize &= 0x7FFFFFFF;
}
DataSize--; // remove the type byte already added before
p += DataSize;
break;
case BINN_STORAGE_STRING:
if (p > plimit) return 0;
DataSize = *((unsigned char*)p);
if (DataSize & 0x80) {
if (p + sizeof(int) - 1 > plimit) return 0;
DataSize = *((int*)p); p+=4;
DataSize = frombe32(DataSize);
DataSize &= 0x7FFFFFFF;
} else {
p++;
}
p += DataSize;
p++; // null terminator.
break;
default:
return 0;
}
if (p > plimit) return 0;
return p;
}
/***************************************************************************/
BINN_PRIVATE unsigned char * SearchForID(unsigned char *p, int header_size, int size, int numitems, int id) {
unsigned char *plimit, *base;
int i, int32;
base = p;
plimit = p + size - 1;
p += header_size;
// search for the ID in all the arguments.
for (i = 0; i < numitems; i++) {
int32 = *((int*)p); p += 4;
int32 = frombe32(int32);
if (p > plimit) break;
// Compare if the IDs are equal.
if (int32 == id) return p;
// xxx
p = AdvanceDataPos(p, plimit);
if ((p == 0) || (p < base)) break;
}
return NULL;
}
/***************************************************************************/
BINN_PRIVATE unsigned char * SearchForKey(unsigned char *p, int header_size, int size, int numitems, char *key) {
unsigned char len, *plimit, *base;
int i, keylen;
base = p;
plimit = p + size - 1;
p += header_size;
keylen = strlen(key);
// search for the key in all the arguments.
for (i = 0; i < numitems; i++) {
len = *((unsigned char *)p);
p++;
if (p > plimit) break;
// Compare if the strings are equal.
if (len > 0) {
if (strnicmp((char*)p, key, len) == 0) { // note that there is no null terminator here
if (keylen == len) {
p += len;
return p;
}
}
p += len;
if (p > plimit) break;
} else if (len == keylen) { // in the case of empty string: ""
return p;
}
// xxx
p = AdvanceDataPos(p, plimit);
if ((p == 0) || (p < base)) break;
}
return NULL;
}
/***************************************************************************/
BINN_PRIVATE BOOL AddValue(binn *item, int type, void *pvalue, int size);
/***************************************************************************/
BINN_PRIVATE BOOL binn_list_add_raw(binn *item, int type, void *pvalue, int size) {
if ((item == NULL) || (item->type != BINN_LIST) || (item->writable == FALSE)) return FALSE;
//if (CheckAllocation(item, 4) == FALSE) return FALSE; // 4 bytes used for data_store and data_format.
if (AddValue(item, type, pvalue, size) == FALSE) return FALSE;
item->count++;
return TRUE;
}
/***************************************************************************/
BINN_PRIVATE BOOL binn_object_set_raw(binn *item, char *key, int type, void *pvalue, int size) {
unsigned char *p, len;
int int32;
if ((item == NULL) || (item->type != BINN_OBJECT) || (item->writable == FALSE)) return FALSE;
if (key == NULL) return FALSE;
int32 = strlen(key);
if (int32 > 255) return FALSE;
// is the key already in it?
p = SearchForKey(item->pbuf, MAX_BINN_HEADER, item->used_size, item->count, key);
if (p) return FALSE;
// start adding it
if (CheckAllocation(item, 1 + int32) == FALSE) return FALSE; // bytes used for the key size and the key itself.
p = ((unsigned char *) item->pbuf) + item->used_size;
len = int32;
*p = len;
p++;
memcpy(p, key, int32);
int32++; // now contains the strlen + 1 byte for the len
item->used_size += int32;
if (AddValue(item, type, pvalue, size) == FALSE) {
item->used_size -= int32;
return FALSE;
}
item->count++;
return TRUE;
}
/***************************************************************************/
BINN_PRIVATE BOOL binn_map_set_raw(binn *item, int id, int type, void *pvalue, int size) {
unsigned char *p;
int int32;
if ((item == NULL) || (item->type != BINN_MAP) || (item->writable == FALSE)) return FALSE;
// is the ID already in it?
p = SearchForID(item->pbuf, MAX_BINN_HEADER, item->used_size, item->count, id);
if (p) return FALSE;
// start adding it
if (CheckAllocation(item, 4) == FALSE) return FALSE; // 4 bytes used for the id.
int32 = tobe32(id);
p = ((unsigned char *) item->pbuf) + item->used_size;
*((int *)p) = int32;
item->used_size += 4;
if (AddValue(item, type, pvalue, size) == FALSE) {
item->used_size -= 4;
return FALSE;
}
item->count++;
return TRUE;
}
/***************************************************************************/
BINN_PRIVATE void * compress_int(int *pstorage_type, int *ptype, void *psource) {
int storage_type, storage_type2, type, type2=0;
int64 vint;
uint64 vuint;
char *pvalue;
#if __BYTE_ORDER == __BIG_ENDIAN
int size1, size2;
#endif
storage_type = *pstorage_type;
if (storage_type == BINN_STORAGE_BYTE) return psource;
type = *ptype;
switch (type) {
case BINN_INT64:
vint = *(int64*)psource;
goto loc_signed;
case BINN_INT32:
vint = *(int*)psource;
goto loc_signed;
case BINN_INT16:
vint = *(short*)psource;
goto loc_signed;
case BINN_UINT64:
vuint = *(uint64*)psource;
goto loc_positive;
case BINN_UINT32:
vuint = *(unsigned int*)psource;
goto loc_positive;
case BINN_UINT16:
vuint = *(unsigned short*)psource;
goto loc_positive;
}
loc_signed:
if (vint >= 0) {
vuint = vint;
goto loc_positive;
}
//loc_negative:
if (vint >= INT8_MIN) {
type2 = BINN_INT8;
} else
if (vint >= INT16_MIN) {
type2 = BINN_INT16;
} else
if (vint >= INT32_MIN) {
type2 = BINN_INT32;
}
goto loc_exit;
loc_positive:
if (vuint <= UINT8_MAX) {
type2 = BINN_UINT8;
} else
if (vuint <= UINT16_MAX) {
type2 = BINN_UINT16;
} else
if (vuint <= UINT32_MAX) {
type2 = BINN_UINT32;
}
loc_exit:
pvalue = (char *) psource;
if ((type2) && (type2 != type)) {
*ptype = type2;
storage_type2 = binn_get_write_storage(type2);
*pstorage_type = storage_type2;
#if __BYTE_ORDER == __BIG_ENDIAN
size1 = get_storage_size(storage_type);
size2 = get_storage_size(storage_type2);
pvalue += (size1 - size2);
#endif
}
return pvalue;
}
/***************************************************************************/
BINN_PRIVATE int type_family(int type);
BINN_PRIVATE BOOL AddValue(binn *item, int type, void *pvalue, int size) {
int int32, ArgSize, storage_type, extra_type;
short int16;
uint64 int64;
unsigned char *p, *ptr;
binn_get_type_info(type, &storage_type, &extra_type);
if (pvalue == NULL) {
switch (storage_type) {
case BINN_STORAGE_NOBYTES:
break;
case BINN_STORAGE_BLOB:
case BINN_STORAGE_STRING:
if (size == 0) break; // the 2 above are allowed to have 0 length
default:
return FALSE;
}
}
if ((type_family(type) == BINN_FAMILY_INT) && (item->disable_int_compression == FALSE))
pvalue = compress_int(&storage_type, &type, pvalue);
switch (storage_type) {
case BINN_STORAGE_NOBYTES:
size = 0;
ArgSize = size;
break;
case BINN_STORAGE_BYTE:
size = 1;
ArgSize = size;
break;
case BINN_STORAGE_WORD:
size = 2;
ArgSize = size;
break;
case BINN_STORAGE_DWORD:
size = 4;
ArgSize = size;
break;
case BINN_STORAGE_QWORD:
size = 8;
ArgSize = size;
break;
case BINN_STORAGE_BLOB:
if (size < 0) return FALSE;
//if (size == 0) ...
ArgSize = size + 4;
break;
case BINN_STORAGE_STRING:
if (size < 0) return FALSE;
if (size == 0) size = strlen2( (char *) pvalue);
ArgSize = size + 5; // at least this size
break;
case BINN_STORAGE_CONTAINER:
if (size <= 0) return FALSE;
ArgSize = size;
break;
default:
return FALSE;
}
ArgSize += 2; // at least 2 bytes used for data_type.
if (CheckAllocation(item, ArgSize) == FALSE) return FALSE;
// Gets the pointer to the next place in buffer
p = ((unsigned char *) item->pbuf) + item->used_size;
// If the data is not a container, store the data type
if (storage_type != BINN_STORAGE_CONTAINER) {
ptr = (unsigned char *) &type;
if (type > 255) {
type = tobe16(type); // correct the endianess, if needed
*p = *ptr; p++;
item->used_size++;
ptr++;
}
*p = *ptr; p++;
item->used_size++;
}
switch (storage_type) {
case BINN_STORAGE_NOBYTES:
// Nothing to do.
break;
case BINN_STORAGE_BYTE:
//*((char *) p) = (char) Value;
*((char *) p) = *((char *) pvalue);
item->used_size += 1;
break;
case BINN_STORAGE_WORD:
//int16 = tobe16( (short) Value);
int16 = *((short *) pvalue);
int16 = tobe16(int16);
*((short *) p) = int16;
item->used_size += 2;
break;
case BINN_STORAGE_DWORD:
//int32 = tobe32( (int) Value);
int32 = *((int *) pvalue);
int32 = tobe32(int32);
*((int *) p) = int32;
item->used_size += 4;
break;
case BINN_STORAGE_QWORD:
// is there an htond or htonq to be used with qwords? (64 bits)
int64 = *((uint64 *) pvalue);
int64 = tobe64(int64);
*((uint64 *) p) = int64;
item->used_size += 8;
break;
case BINN_STORAGE_BLOB:
int32 = tobe32(size);
*((int *) p) = int32;
p += 4;
memcpy(p, pvalue, size);
item->used_size += 4 + size;
break;
case BINN_STORAGE_STRING:
if (size > 127) {
int32 = size | 0x80000000;
int32 = tobe32(int32);
*((int *) p) = int32;
p += 4;
item->used_size += 4;
} else {
*((unsigned char *) p) = size;
p++;
item->used_size++;
}
memcpy(p, pvalue, size);
p += size;
*((char *) p) = (char) 0;
size++; // null terminator
item->used_size += size;
break;
case BINN_STORAGE_CONTAINER:
memcpy(p, pvalue, size);
item->used_size += size;
break;
}
item->dirty = TRUE;
return TRUE;
}
/***************************************************************************/
BINN_PRIVATE BOOL binn_save_header(binn *item) {
unsigned char byte, *p;
int int32, size;
if (item == NULL) return FALSE;
#ifndef BINN_DISABLE_SMALL_HEADER
p = ((unsigned char *) item->pbuf) + MAX_BINN_HEADER;
size = item->used_size - MAX_BINN_HEADER + 3; // at least 3 bytes for the header
// write the count
if (item->count > 127) {
p -= 4;
size += 3;
int32 = item->count | 0x80000000;
int32 = tobe32(int32);
*((int *)p) = int32;
} else {
p--;
*p = (unsigned char) item->count;
}
// write the size
if (size > 127) {
p -= 4;
size += 3;
int32 = size | 0x80000000;
int32 = tobe32(int32);
*((int *)p) = int32;
} else {
p--;
*p = (unsigned char) size;
}
// write the type.
p--;
*p = (unsigned char) item->type;
// set the values
item->ptr = p;
item->size = size;
UNUSED(byte);
#else
p = (unsigned char *) item->pbuf;
// write the type.
byte = item->type;
*p = byte; p++;
// write the size
int32 = item->used_size | 0x80000000;
int32 = tobe32(int32);
*((int *)p) = int32; p+=4;
// write the count
int32 = item->count | 0x80000000;
int32 = tobe32(int32);
*((int *)p) = int32;
item->ptr = item->pbuf;
item->size = item->used_size;
#endif
item->dirty = FALSE;
return TRUE;
}
/***************************************************************************/
void APIENTRY binn_free(binn *item) {
if (item == NULL) return;
if ((item->writable) && (item->pre_allocated == FALSE)) {
free_fn(item->pbuf);
}
if (item->freefn) item->freefn(item->ptr);