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session-android/jni/webrtc/system_wrappers/source/sort.cc
Moxie Marlinspike d83a3d71bc Support for Signal calls. 
Merge in RedPhone

// FREEBIE
2015-09-30 14:30:09 -07:00

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/*
* Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
// When the platform supports STL, the functions are implemented using a
// templated spreadsort algorithm (http://sourceforge.net/projects/spreadsort/),
// part of the Boost C++ library collection. Otherwise, the C standard library's
// qsort() will be used.
#include "webrtc/system_wrappers/interface/sort.h"
#include <assert.h>
#include <string.h> // memcpy
#include <new> // nothrow new
#ifdef NO_STL
#include <stdlib.h> // qsort
#else
#include <algorithm> // std::sort
#include <vector>
// TODO(ajm) upgrade to spreadsort v2.
#include "webrtc/system_wrappers/source/spreadsortlib/spreadsort.hpp"
#endif
#ifdef NO_STL
#define COMPARE_DEREFERENCED(XT, YT) \
do { \
if ((XT) > (YT)) { \
return 1; \
} \
else if ((XT) < (YT)) { \
return -1; \
} \
return 0; \
} while(0)
#define COMPARE_FOR_QSORT(X, Y, TYPE) \
do { \
TYPE xT = static_cast<TYPE>(*static_cast<const TYPE*>(X)); \
TYPE yT = static_cast<TYPE>(*static_cast<const TYPE*>(Y)); \
COMPARE_DEREFERENCED(xT, yT); \
} while(0)
#define COMPARE_KEY_FOR_QSORT(SORT_KEY_X, SORT_KEY_Y, TYPE) \
do { \
TYPE xT = static_cast<TYPE>( \
*static_cast<TYPE*>(static_cast<const SortKey*>(SORT_KEY_X)->key_)); \
TYPE yT = static_cast<TYPE>( \
*static_cast<TYPE*>(static_cast<const SortKey*>(SORT_KEY_Y)->key_)); \
COMPARE_DEREFERENCED(xT, yT); \
} while(0)
#define KEY_QSORT(SORT_KEY, KEY, NUM_OF_ELEMENTS, KEY_TYPE, COMPARE_FUNC) \
do { \
KEY_TYPE* key_type = (KEY_TYPE*)(key); \
for (uint32_t i = 0; i < (NUM_OF_ELEMENTS); ++i) { \
ptr_sort_key[i].key_ = &key_type[i]; \
ptr_sort_key[i].index_ = i; \
} \
qsort((SORT_KEY), (NUM_OF_ELEMENTS), sizeof(SortKey), (COMPARE_FUNC)); \
} while(0)
#endif
namespace webrtc {
#ifdef NO_STL
struct SortKey {
void* key_;
uint32_t index_;
};
#else
template<typename KeyType>
struct SortKey {
KeyType key_;
uint32_t index_;
};
#endif
namespace { // Unnamed namespace provides internal linkage.
#ifdef NO_STL
int CompareWord8(const void* x, const void* y) {
COMPARE_FOR_QSORT(x, y, int8_t);
}
int CompareUWord8(const void* x, const void* y) {
COMPARE_FOR_QSORT(x, y, uint8_t);
}
int CompareWord16(const void* x, const void* y) {
COMPARE_FOR_QSORT(x, y, int16_t);
}
int CompareUWord16(const void* x, const void* y) {
COMPARE_FOR_QSORT(x, y, uint16_t);
}
int CompareWord32(const void* x, const void* y) {
COMPARE_FOR_QSORT(x, y, int32_t);
}
int CompareUWord32(const void* x, const void* y) {
COMPARE_FOR_QSORT(x, y, uint32_t);
}
int CompareWord64(const void* x, const void* y) {
COMPARE_FOR_QSORT(x, y, int64_t);
}
int CompareUWord64(const void* x, const void* y) {
COMPARE_FOR_QSORT(x, y, uint64_t);
}
int CompareFloat32(const void* x, const void* y) {
COMPARE_FOR_QSORT(x, y, float);
}
int CompareFloat64(const void* x, const void* y) {
COMPARE_FOR_QSORT(x, y, double);
}
int CompareKeyWord8(const void* sort_key_x, const void* sort_key_y) {
COMPARE_KEY_FOR_QSORT(sort_key_x, sort_key_y, int8_t);
}
int CompareKeyUWord8(const void* sort_key_x, const void* sort_key_y) {
COMPARE_KEY_FOR_QSORT(sort_key_x, sort_key_y, uint8_t);
}
int CompareKeyWord16(const void* sort_key_x, const void* sort_key_y) {
COMPARE_KEY_FOR_QSORT(sort_key_x, sort_key_y, int16_t);
}
int CompareKeyUWord16(const void* sort_key_x, const void* sort_key_y) {
COMPARE_KEY_FOR_QSORT(sort_key_x, sort_key_y, uint16_t);
}
int CompareKeyWord32(const void* sort_key_x, const void* sort_key_y) {
COMPARE_KEY_FOR_QSORT(sort_key_x, sort_key_y, int32_t);
}
int CompareKeyUWord32(const void* sort_key_x, const void* sort_key_y) {
COMPARE_KEY_FOR_QSORT(sort_key_x, sort_key_y, uint32_t);
}
int CompareKeyWord64(const void* sort_key_x, const void* sort_key_y) {
COMPARE_KEY_FOR_QSORT(sort_key_x, sort_key_y, int64_t);
}
int CompareKeyUWord64(const void* sort_key_x, const void* sort_key_y) {
COMPARE_KEY_FOR_QSORT(sort_key_x, sort_key_y, uint64_t);
}
int CompareKeyFloat32(const void* sort_key_x, const void* sort_key_y) {
COMPARE_KEY_FOR_QSORT(sort_key_x, sort_key_y, float);
}
int CompareKeyFloat64(const void* sort_key_x, const void* sort_key_y) {
COMPARE_KEY_FOR_QSORT(sort_key_x, sort_key_y, double);
}
#else
template <typename KeyType>
struct KeyLessThan {
bool operator()(const SortKey<KeyType>& sort_key_x,
const SortKey<KeyType>& sort_key_y) const {
return sort_key_x.key_ < sort_key_y.key_;
}
};
template <typename KeyType>
struct KeyRightShift {
KeyType operator()(const SortKey<KeyType>& sort_key,
const unsigned offset) const {
return sort_key.key_ >> offset;
}
};
template <typename DataType>
inline void IntegerSort(void* data, uint32_t num_of_elements) {
DataType* data_type = static_cast<DataType*>(data);
boost::integer_sort(data_type, data_type + num_of_elements);
}
template <typename DataType, typename IntegerType>
inline void FloatSort(void* data, uint32_t num_of_elements) {
DataType* data_type = static_cast<DataType*>(data);
IntegerType c_val = 0;
boost::float_sort_cast(data_type, data_type + num_of_elements, c_val);
}
template <typename DataType>
inline void StdSort(void* data, uint32_t num_of_elements) {
DataType* data_type = static_cast<DataType*>(data);
std::sort(data_type, data_type + num_of_elements);
}
template<typename KeyType>
inline int32_t SetupKeySort(void* key,
SortKey<KeyType>*& ptr_sort_key,
uint32_t num_of_elements) {
ptr_sort_key = new(std::nothrow) SortKey<KeyType>[num_of_elements];
if (ptr_sort_key == NULL) {
return -1;
}
KeyType* key_type = static_cast<KeyType*>(key);
for (uint32_t i = 0; i < num_of_elements; i++) {
ptr_sort_key[i].key_ = key_type[i];
ptr_sort_key[i].index_ = i;
}
return 0;
}
template<typename KeyType>
inline int32_t TeardownKeySort(void* data,
SortKey<KeyType>* ptr_sort_key,
uint32_t num_of_elements,
uint32_t size_of_element) {
uint8_t* ptr_data = static_cast<uint8_t*>(data);
uint8_t* ptr_data_sorted =
new(std::nothrow) uint8_t[num_of_elements * size_of_element];
if (ptr_data_sorted == NULL) {
return -1;
}
for (uint32_t i = 0; i < num_of_elements; i++) {
memcpy(ptr_data_sorted + i * size_of_element, ptr_data +
ptr_sort_key[i].index_ * size_of_element, size_of_element);
}
memcpy(ptr_data, ptr_data_sorted, num_of_elements * size_of_element);
delete[] ptr_sort_key;
delete[] ptr_data_sorted;
return 0;
}
template<typename KeyType>
inline int32_t IntegerKeySort(void* data, void* key,
uint32_t num_of_elements,
uint32_t size_of_element) {
SortKey<KeyType>* ptr_sort_key;
if (SetupKeySort<KeyType>(key, ptr_sort_key, num_of_elements) != 0) {
return -1;
}
boost::integer_sort(ptr_sort_key, ptr_sort_key + num_of_elements,
KeyRightShift<KeyType>(), KeyLessThan<KeyType>());
if (TeardownKeySort<KeyType>(data, ptr_sort_key, num_of_elements,
size_of_element) != 0) {
return -1;
}
return 0;
}
template<typename KeyType>
inline int32_t StdKeySort(void* data, void* key,
uint32_t num_of_elements,
uint32_t size_of_element) {
SortKey<KeyType>* ptr_sort_key;
if (SetupKeySort<KeyType>(key, ptr_sort_key, num_of_elements) != 0) {
return -1;
}
std::sort(ptr_sort_key, ptr_sort_key + num_of_elements,
KeyLessThan<KeyType>());
if (TeardownKeySort<KeyType>(data, ptr_sort_key, num_of_elements,
size_of_element) != 0) {
return -1;
}
return 0;
}
#endif
}
int32_t Sort(void* data, uint32_t num_of_elements, Type type) {
if (data == NULL) {
return -1;
}
#ifdef NO_STL
switch (type) {
case TYPE_Word8:
qsort(data, num_of_elements, sizeof(int8_t), CompareWord8);
break;
case TYPE_UWord8:
qsort(data, num_of_elements, sizeof(uint8_t), CompareUWord8);
break;
case TYPE_Word16:
qsort(data, num_of_elements, sizeof(int16_t), CompareWord16);
break;
case TYPE_UWord16:
qsort(data, num_of_elements, sizeof(uint16_t), CompareUWord16);
break;
case TYPE_Word32:
qsort(data, num_of_elements, sizeof(int32_t), CompareWord32);
break;
case TYPE_UWord32:
qsort(data, num_of_elements, sizeof(uint32_t), CompareUWord32);
break;
case TYPE_Word64:
qsort(data, num_of_elements, sizeof(int64_t), CompareWord64);
break;
case TYPE_UWord64:
qsort(data, num_of_elements, sizeof(uint64_t), CompareUWord64);
break;
case TYPE_Float32:
qsort(data, num_of_elements, sizeof(float), CompareFloat32);
break;
case TYPE_Float64:
qsort(data, num_of_elements, sizeof(double), CompareFloat64);
break;
default:
return -1;
}
#else
// Fall back to std::sort for 64-bit types and floats due to compiler
// warnings and VS 2003 build crashes respectively with spreadsort.
switch (type) {
case TYPE_Word8:
IntegerSort<int8_t>(data, num_of_elements);
break;
case TYPE_UWord8:
IntegerSort<uint8_t>(data, num_of_elements);
break;
case TYPE_Word16:
IntegerSort<int16_t>(data, num_of_elements);
break;
case TYPE_UWord16:
IntegerSort<uint16_t>(data, num_of_elements);
break;
case TYPE_Word32:
IntegerSort<int32_t>(data, num_of_elements);
break;
case TYPE_UWord32:
IntegerSort<uint32_t>(data, num_of_elements);
break;
case TYPE_Word64:
StdSort<int64_t>(data, num_of_elements);
break;
case TYPE_UWord64:
StdSort<uint64_t>(data, num_of_elements);
break;
case TYPE_Float32:
StdSort<float>(data, num_of_elements);
break;
case TYPE_Float64:
StdSort<double>(data, num_of_elements);
break;
}
#endif
return 0;
}
int32_t KeySort(void* data, void* key, uint32_t num_of_elements,
uint32_t size_of_element, Type key_type) {
if (data == NULL) {
return -1;
}
if (key == NULL) {
return -1;
}
if ((uint64_t)num_of_elements * size_of_element > 0xffffffff) {
return -1;
}
#ifdef NO_STL
SortKey* ptr_sort_key = new(std::nothrow) SortKey[num_of_elements];
if (ptr_sort_key == NULL) {
return -1;
}
switch (key_type) {
case TYPE_Word8:
KEY_QSORT(ptr_sort_key, key, num_of_elements, int8_t,
CompareKeyWord8);
break;
case TYPE_UWord8:
KEY_QSORT(ptr_sort_key, key, num_of_elements, uint8_t,
CompareKeyUWord8);
break;
case TYPE_Word16:
KEY_QSORT(ptr_sort_key, key, num_of_elements, int16_t,
CompareKeyWord16);
break;
case TYPE_UWord16:
KEY_QSORT(ptr_sort_key, key, num_of_elements, uint16_t,
CompareKeyUWord16);
break;
case TYPE_Word32:
KEY_QSORT(ptr_sort_key, key, num_of_elements, int32_t,
CompareKeyWord32);
break;
case TYPE_UWord32:
KEY_QSORT(ptr_sort_key, key, num_of_elements, uint32_t,
CompareKeyUWord32);
break;
case TYPE_Word64:
KEY_QSORT(ptr_sort_key, key, num_of_elements, int64_t,
CompareKeyWord64);
break;
case TYPE_UWord64:
KEY_QSORT(ptr_sort_key, key, num_of_elements, uint64_t,
CompareKeyUWord64);
break;
case TYPE_Float32:
KEY_QSORT(ptr_sort_key, key, num_of_elements, float,
CompareKeyFloat32);
break;
case TYPE_Float64:
KEY_QSORT(ptr_sort_key, key, num_of_elements, double,
CompareKeyFloat64);
break;
default:
return -1;
}
// Shuffle into sorted position based on index map.
uint8_t* ptr_data = static_cast<uint8_t*>(data);
uint8_t* ptr_data_sorted =
new(std::nothrow) uint8_t[num_of_elements * size_of_element];
if (ptr_data_sorted == NULL) {
return -1;
}
for (uint32_t i = 0; i < num_of_elements; i++) {
memcpy(ptr_data_sorted + i * size_of_element, ptr_data +
ptr_sort_key[i].index_ * size_of_element, size_of_element);
}
memcpy(ptr_data, ptr_data_sorted, num_of_elements * size_of_element);
delete[] ptr_sort_key;
delete[] ptr_data_sorted;
return 0;
#else
// Fall back to std::sort for 64-bit types and floats due to compiler
// warnings and errors respectively with spreadsort.
switch (key_type) {
case TYPE_Word8:
return IntegerKeySort<int8_t>(data, key, num_of_elements,
size_of_element);
case TYPE_UWord8:
return IntegerKeySort<uint8_t>(data, key, num_of_elements,
size_of_element);
case TYPE_Word16:
return IntegerKeySort<int16_t>(data, key, num_of_elements,
size_of_element);
case TYPE_UWord16:
return IntegerKeySort<uint16_t>(data, key, num_of_elements,
size_of_element);
case TYPE_Word32:
return IntegerKeySort<int32_t>(data, key, num_of_elements,
size_of_element);
case TYPE_UWord32:
return IntegerKeySort<uint32_t>(data, key, num_of_elements,
size_of_element);
case TYPE_Word64:
return StdKeySort<int64_t>(data, key, num_of_elements,
size_of_element);
case TYPE_UWord64:
return StdKeySort<uint64_t>(data, key, num_of_elements,
size_of_element);
case TYPE_Float32:
return StdKeySort<float>(data, key, num_of_elements, size_of_element);
case TYPE_Float64:
return StdKeySort<double>(data, key, num_of_elements, size_of_element);
}
assert(false);
return -1;
#endif
}
} // namespace webrtc
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