Quelle roaring.h
Sprache: C
/*
* Amalgamated copy of CRoaring 4 . 3 . 5 , modified for GTK to reduce compiler
* warnings .
*
* Copyright 2016 - 2022 The CRoaring authors
* Copyright 2025 Red Hat , Inc
*
* Licensed under the Apache License , Version 2 . 0 ( the " License " ) ;
* you may not use this file except in compliance with the License .
* You may obtain a copy of the License at
*
* http : //www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing , software
* distributed under the License is distributed on an " AS IS " BASIS ,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND , either express or implied .
* See the License for the specific language governing permissions and
* limitations under the License .
*
* SPDX - License - Identifier : Apache - 2 . 0
*/
/* begin file include/roaring/roaring_version.h */
// clang-format off
// /include/roaring/roaring_version.h automatically generated by release.py, do not change by hand
#ifndef ROARING_INCLUDE_ROARING_VERSION
#define ROARING_INCLUDE_ROARING_VERSION
#define ROARING_VERSION
"4.3.5"
enum {
ROARING_VERSION_MAJOR =
4 ,
ROARING_VERSION_MINOR =
3 ,
ROARING_VERSION_REVISION =
5
};
#endif // ROARING_INCLUDE_ROARING_VERSION
// clang-format on/* end file include/roaring/roaring_version.h */
/* begin file include/roaring/portability.h */
/*
* portability . h
*
*/
/**
* All macros should be prefixed with either CROARING or ROARING .
* The library uses both ROARING_ . . .
* as well as CROAIRING_ as prefixes . The ROARING_ prefix is for
* macros that are provided by the build system or that are closely
* related to the format . The header macros may also use ROARING_ .
* The CROARING_ prefix is for internal macros that a user is unlikely
* to ever interact with .
*/
#ifndef CROARING_INCLUDE_PORTABILITY_H_
#define CROARING_INCLUDE_PORTABILITY_H_
// Users who need _GNU_SOURCE should define it?
// #ifndef _GNU_SOURCE
// #define _GNU_SOURCE 1
// #endif // _GNU_SOURCE
#ifndef __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
1
#endif // __STDC_FORMAT_MACROS
#ifdef _MSC_VER
#define CROARING_VISUAL_STUDIO
1
/**
* We want to differentiate carefully between
* clang under visual studio and regular visual
* studio .
*/
#ifdef __clang__
// clang under visual studio
#define CROARING_CLANG_VISUAL_STUDIO
1
#else
// just regular visual studio (best guess)
#define CROARING_REGULAR_VISUAL_STUDIO
1
#endif // __clang__
#endif // _MSC_VER
#ifndef CROARING_VISUAL_STUDIO
#define CROARING_VISUAL_STUDIO
0
#endif
#ifndef CROARING_CLANG_VISUAL_STUDIO
#define CROARING_CLANG_VISUAL_STUDIO
0
#endif
#ifndef CROARING_REGULAR_VISUAL_STUDIO
#define CROARING_REGULAR_VISUAL_STUDIO
0
#endif
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
// will provide posix_memalign with _POSIX_C_SOURCE as defined above
#ifdef __GLIBC__
#include <malloc.h>
// this should never be needed but there are some reports that it is needed.
#endif
#ifdef __cplusplus
extern "C" {
// portability definitions are in global scope, not a namespace
#endif
#if defined (__SIZEOF_LONG_LONG__) && __SIZEOF_LONG_LONG__ !=
8
#error This code assumes
64 -bit
long longs (by use of the GCC intrinsics). Your system is
not cur
rently supported.
#endif
#if CROARING_REGULAR_VISUAL_STUDIO
#ifndef __restrict__
#define __restrict__ __restrict
#endif // __restrict__
#endif // CROARING_REGULAR_VISUAL_STUDIO
#if defined (__x86_64__) || defined (_M_X64)
// we have an x64 processor
#define CROARING_IS_X64 1
#if defined (_MSC_VER) && (_MSC_VER < 1910 )
// Old visual studio systems won't support AVX2 well.
#undef CROARING_IS_X64
#endif
#if defined (__clang_major__) && (__clang_major__ <= 8 ) && !defined (__AVX2__)
// Older versions of clang have a bug affecting us
// https://stackoverflow.com/questions/57228537/how-does-one-use-pragma-clang-attribute-push-with-c-namespaces
#undef CROARING_IS_X64
#endif
#ifdef ROARING_DISABLE_X64
#undef CROARING_IS_X64
#endif
// we include the intrinsic header
#if !CROARING_REGULAR_VISUAL_STUDIO
/* Non-Microsoft C/C++-compatible compiler */
#include <x86intrin.h> // on some recent GCC, this will declare posix_memalign
#if CROARING_CLANG_VISUAL_STUDIO
/**
* You are not supposed , normally , to include these
* headers directly . Instead you should either include intrin . h
* or x86intrin . h . However , when compiling with clang
* under Windows ( i . e . , when _ MSC_VER is set ) , these headers
* only get included * if * the corresponding features are detected
* from macros :
* e . g . , if _ _ AVX2__ is set . . . in turn , we normally set these
* macros by compiling against the corresponding architecture
* ( e . g . , arch : AVX2 , - mavx2 , etc . ) which compiles the whole
* software with these advanced instructions . These headers would
* normally guard against such usage , but we carefully included
* < x86intrin . h > ( or < intrin . h > ) before , so the headers
* are fooled .
*/
// To avoid reordering imports:
// clang-format off
#include <bmiintrin.h> // for _blsr_u64
#include <lzcntintrin.h> // for __lzcnt64
#include <immintrin.h> // for most things (AVX2, AVX512, _popcnt64)
#include <smmintrin.h>
#include <tmmintrin.h>
#include <avxintrin.h>
#include <avx2intrin.h>
#include <wmmintrin.h>
#if _MSC_VER >= 1920
// Important: we need the AVX-512 headers:
#include <avx512fintrin.h>
#include <avx512dqintrin.h>
#include <avx512cdintrin.h>
#include <avx512bwintrin.h>
#include <avx512vlintrin.h>
#include <avx512vbmiintrin.h>
#include <avx512vbmi2intrin.h>
#include <avx512vpopcntdqintrin.h>
// clang-format on
#endif // _MSC_VER >= 1920
// unfortunately, we may not get _blsr_u64, but, thankfully, clang
// has it as a macro.
#ifndef _blsr_u64
// we roll our own
#define _blsr_u64(n) ((n - 1 ) & n)
#endif // _blsr_u64
#endif // SIMDJSON_CLANG_VISUAL_STUDIO
#endif // CROARING_REGULAR_VISUAL_STUDIO
#endif // defined(__x86_64__) || defined(_M_X64)
#if !defined (CROARING_USENEON) && !defined (DISABLENEON) && defined (__ARM_NEON)
#define CROARING_USENEON
#endif
#if defined (CROARING_USENEON)
#include <arm_neon.h>
#endif
#if !CROARING_REGULAR_VISUAL_STUDIO
/* Non-Microsoft C/C++-compatible compiler, assumes that it supports inline
* assembly */
#define CROARING_INLINE_ASM 1
#endif // _MSC_VER
#if CROARING_REGULAR_VISUAL_STUDIO
/* Microsoft C/C++-compatible compiler */
#include <intrin.h>
#ifndef __clang__ // if one compiles with MSVC *with* clang, then these
// intrinsics are defined!!!
#define CROARING_INTRINSICS 1
// sadly there is no way to check whether we are missing these intrinsics
// specifically.
/* wrappers for Visual Studio built-ins that look like gcc built-ins
* __builtin_ctzll */
/** result might be undefined when input_num is zero */
static inline int roaring_trailing_zeroes(unsigned long long input_num) {
unsigned long index;
#ifdef _WIN64 // highly recommended!!!
_BitScanForward64(&index, input_num);
#else // if we must support 32-bit Windows
if ((uint32_t)input_num != 0 ) {
_BitScanForward(&index, (uint32_t)input_num);
} else {
_BitScanForward(&index, (uint32_t)(input_num >> 32 ));
index += 32 ;
}
#endif // _WIN64
return index;
}
/* wrappers for Visual Studio built-ins that look like gcc built-ins
* __builtin_clzll */
/** result might be undefined when input_num is zero */
static inline int roaring_leading_zeroes(unsigned long long input_num) {
unsigned long index;
#ifdef _WIN64 // highly recommended!!!
_BitScanReverse64(&index, input_num);
#else // if we must support 32-bit Windows
if (input_num > 0 xFFFFFFFF) {
_BitScanReverse(&index, (uint32_t)(input_num >> 32 ));
index += 32 ;
} else {
_BitScanReverse(&index, (uint32_t)(input_num));
}
#endif // _WIN64
return 63 - index;
}
/* Use #define so this is effective even under /Ob0 (no inline) */
#define roaring_unreachable __assume(0 )
#endif // __clang__
#endif // CROARING_REGULAR_VISUAL_STUDIO
#ifndef CROARING_INTRINSICS
#define CROARING_INTRINSICS 1
#define roaring_unreachable __builtin_unreachable()
/** result might be undefined when input_num is zero */
static inline int roaring_trailing_zeroes(unsigned long long input_num) {
return __builtin_ctzll(input_num);
}
/** result might be undefined when input_num is zero */
static inline int roaring_leading_zeroes(unsigned long long input_num) {
return __builtin_clzll(input_num);
}
#endif
#if CROARING_REGULAR_VISUAL_STUDIO
#define ALIGNED(x) __declspec(align(x))
#elif defined (__GNUC__) || defined (__clang__)
#define ALIGNED(x) __attribute__((aligned(x)))
#else
#warning "Warning. Unrecognized compiler."
#define ALIGNED(x)
#endif
#if defined (__GNUC__) || defined (__clang__)
#define CROARING_WARN_UNUSED __attribute__((warn_unused_result))
#else
#define CROARING_WARN_UNUSED
#endif
#define IS_BIG_ENDIAN (*(uint16_t *)"\0\xff" < 0 x100)
#ifdef CROARING_USENEON
// we can always compute the popcount fast.
#elif (defined (_M_ARM) || defined (_M_ARM64)) && \
((defined (_WIN64) || defined (_WIN32)) && \
defined (CROARING_REGULAR_VISUAL_STUDIO) && \
CROARING_REGULAR_VISUAL_STUDIO)
// we will need this function:
static inline int roaring_hamming_backup(uint64_t x) {
uint64_t c1 = UINT64_C(0 x5555555555555555);
uint64_t c2 = UINT64_C(0 x3333333333333333);
uint64_t c4 = UINT64_C(0 x0F0F0F0F0F0F0F0F);
x -= (x >> 1 ) & c1;
x = ((x >> 2 ) & c2) + (x & c2);
x = (x + (x >> 4 )) & c4;
x *= UINT64_C(0 x0101010101010101);
return x >> 56 ;
}
#endif
static inline int roaring_hamming(uint64_t x) {
#if defined (_WIN64) && defined (CROARING_REGULAR_VISUAL_STUDIO) && \
CROARING_REGULAR_VISUAL_STUDIO
#ifdef CROARING_USENEON
return vaddv_u8(vcnt_u8(vcreate_u8(input_num)));
#elif defined (_M_ARM64)
return roaring_hamming_backup(x);
// (int) _CountOneBits64(x); is unavailable
#else // _M_ARM64
return (int )__popcnt64(x);
#endif // _M_ARM64
#elif defined (_WIN32) && defined (CROARING_REGULAR_VISUAL_STUDIO) && \
CROARING_REGULAR_VISUAL_STUDIO
#ifdef _M_ARM
return roaring_hamming_backup(x);
// _CountOneBits is unavailable
#else // _M_ARM
return (int )__popcnt((unsigned int )x) +
(int )__popcnt((unsigned int )(x >> 32 ));
#endif // _M_ARM
#else
return __builtin_popcountll(x);
#endif
}
#ifndef UINT64_C
#define UINT64_C(c) (c## ULL)
#endif // UINT64_C
#ifndef UINT32_C
#define UINT32_C(c) (c## UL)
#endif // UINT32_C
#ifdef __cplusplus
} // extern "C" {
#endif // __cplusplus
// this is almost standard?
#undef STRINGIFY_IMPLEMENTATION_
#undef STRINGIFY
#define STRINGIFY_IMPLEMENTATION_(a) #a
#define STRINGIFY(a) STRINGIFY_IMPLEMENTATION_(a)
// Our fast kernels require 64-bit systems.
//
// On 32-bit x86, we lack 64-bit popcnt, lzcnt, blsr instructions.
// Furthermore, the number of SIMD registers is reduced.
//
// On 32-bit ARM, we would have smaller registers.
//
// The library should still have the fallback kernel. It is
// slower, but it should run everywhere.
//
// Enable valid runtime implementations, and select
// CROARING_BUILTIN_IMPLEMENTATION
//
// We are going to use runtime dispatch.
#ifdef CROARING_IS_X64
#ifdef __clang__
// clang does not have GCC push pop
// warning: clang attribute push can't be used within a namespace in clang up
// til 8.0 so CROARING_TARGET_REGION and CROARING_UNTARGET_REGION must be
// *outside* of a namespace.
#define CROARING_TARGET_REGION(T) \
_Pragma(STRINGIFY(clang attribute push(__attribute__((target(T))), \
apply_to = function)))
#define CROARING_UNTARGET_REGION _Pragma("clang attribute pop" )
#elif defined (__GNUC__)
// GCC is easier
#define CROARING_TARGET_REGION(T) \
_Pragma("GCC push_options" ) _Pragma(STRINGIFY(GCC target(T)))
#define CROARING_UNTARGET_REGION _Pragma("GCC pop_options" )
#endif // clang then gcc
#endif // CROARING_IS_X64
// Default target region macros don't do anything.
#ifndef CROARING_TARGET_REGION
#define CROARING_TARGET_REGION(T)
#define CROARING_UNTARGET_REGION
#endif
#define CROARING_TARGET_AVX2 \
CROARING_TARGET_REGION("avx2,bmi,pclmul,lzcnt,popcnt" )
#define CROARING_TARGET_AVX512 \
CROARING_TARGET_REGION( \
"avx2,bmi,bmi2,pclmul,lzcnt,popcnt,avx512f,avx512dq,avx512bw," \
"avx512vbmi2,avx512bitalg,avx512vpopcntdq" )
#define CROARING_UNTARGET_AVX2 CROARING_UNTARGET_REGION
#define CROARING_UNTARGET_AVX512 CROARING_UNTARGET_REGION
#ifdef __AVX2__
// No need for runtime dispatching.
// It is unnecessary and harmful to old clang to tag regions.
#undef CROARING_TARGET_AVX2
#define CROARING_TARGET_AVX2
#undef CROARING_UNTARGET_AVX2
#define CROARING_UNTARGET_AVX2
#endif
#if defined (__AVX512F__) && defined (__AVX512DQ__) && defined (__AVX512BW__) && \
defined (__AVX512VBMI2__) && defined (__AVX512BITALG__) && \
defined (__AVX512VPOPCNTDQ__)
// No need for runtime dispatching.
// It is unnecessary and harmful to old clang to tag regions.
#undef CROARING_TARGET_AVX512
#define CROARING_TARGET_AVX512
#undef CROARING_UNTARGET_AVX512
#define CROARING_UNTARGET_AVX512
#endif
// Allow unaligned memory access
#if defined (__GNUC__) || defined (__clang__)
#define ALLOW_UNALIGNED __attribute__((no_sanitize("alignment" )))
#else
#define ALLOW_UNALIGNED
#endif
#if defined (__BYTE_ORDER__) && defined (__ORDER_BIG_ENDIAN__)
#define CROARING_IS_BIG_ENDIAN (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
#elif defined (_WIN32)
#define CROARING_IS_BIG_ENDIAN 0
#else
#if defined (__APPLE__) || \
defined (__FreeBSD__) // defined __BYTE_ORDER__ && defined
// __ORDER_BIG_ENDIAN__
#include <machine/endian.h>
#elif defined (sun) || \
defined (__sun) // defined(__APPLE__) || defined(__FreeBSD__)
#include <sys/byteorder.h>
#else // defined(__APPLE__) || defined(__FreeBSD__)
#ifdef __has_include
#if __has_include(<endian.h>)
#include <endian.h>
#endif //__has_include(<endian.h>)
#endif //__has_include
#endif // defined(__APPLE__) || defined(__FreeBSD__)
#ifndef !defined (__BYTE_ORDER__) || !defined (__ORDER_LITTLE_ENDIAN__)
#define CROARING_IS_BIG_ENDIAN 0
#endif
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#define CROARING_IS_BIG_ENDIAN 0
#else // __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#define CROARING_IS_BIG_ENDIAN 1
#endif // __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
#endif
// Host <-> big endian conversion.
#if CROARING_IS_BIG_ENDIAN
#define croaring_htobe64(x) (x)
#elif defined (_WIN32) || defined (_WIN64) // CROARING_IS_BIG_ENDIAN
#include <stdlib.h>
#define croaring_htobe64(x) _byteswap_uint64(x)
#elif defined (__APPLE__) // CROARING_IS_BIG_ENDIAN
#include <libkern/OSByteOrder.h>
#define croaring_htobe64(x) OSSwapInt64(x)
#elif defined (__has_include) && \
__has_include( \
<byteswap.h>) && (defined (__linux__) || defined (__FreeBSD__)) // CROARING_IS_BIG_ENDIAN
#include <byteswap.h>
#define croaring_htobe64(x) bswap_64(x)
#else // CROARING_IS_BIG_ENDIAN
// Gets compiled to bswap or equivalent on most compilers.
#define croaring_htobe64(x) \
(((x & 0 x00000000000000FFULL) << 56 ) | \
((x & 0 x000000000000FF00ULL) << 40 ) | \
((x & 0 x0000000000FF0000ULL) << 24 ) | \
((x & 0 x00000000FF000000ULL) << 8 ) | ((x & 0 x000000FF00000000ULL) >> 8 ) | \
((x & 0 x0000FF0000000000ULL) >> 24 ) | \
((x & 0 x00FF000000000000ULL) >> 40 ) | \
((x & 0 xFF00000000000000ULL) >> 56 ))
#endif // CROARING_IS_BIG_ENDIAN
#define croaring_be64toh(x) croaring_htobe64(x)
// End of host <-> big endian conversion.
// Defines for the possible CROARING atomic implementations
#define CROARING_ATOMIC_IMPL_NONE 1
#define CROARING_ATOMIC_IMPL_CPP 2
#define CROARING_ATOMIC_IMPL_C 3
#define CROARING_ATOMIC_IMPL_C_WINDOWS 4
// If the use has forced a specific implementation, use that, otherwise,
// figure out the best implementation we can use.
#if !defined (CROARING_ATOMIC_IMPL)
#if defined (__cplusplus) && __cplusplus >= 201103 L
#ifdef __has_include
#if __has_include(<atomic>)
#define CROARING_ATOMIC_IMPL CROARING_ATOMIC_IMPL_CPP
#endif //__has_include(<atomic>)
#else
// We lack __has_include to check:
#define CROARING_ATOMIC_IMPL CROARING_ATOMIC_IMPL_CPP
#endif //__has_include
#elif __STDC_VERSION__ >= 201112 L && !defined (__STDC_NO_ATOMICS__)
#define CROARING_ATOMIC_IMPL CROARING_ATOMIC_IMPL_C
#elif CROARING_REGULAR_VISUAL_STUDIO
// https://www.technetworkhub.com/c11-atomics-in-visual-studio-2022-version-17/
#define CROARING_ATOMIC_IMPL CROARING_ATOMIC_IMPL_C_WINDOWS
#endif
#endif // !defined(CROARING_ATOMIC_IMPL)
#if CROARING_ATOMIC_IMPL == CROARING_ATOMIC_IMPL_C
#include <stdatomic.h>
typedef _Atomic(uint32_t) croaring_refcount_t;
static inline void croaring_refcount_inc(croaring_refcount_t *val) {
// Increasing the reference counter can always be done with
// memory_order_relaxed: New references to an object can only be formed from
// an existing reference, and passing an existing reference from one thread
// to another must already provide any required synchronization.
atomic_fetch_add_explicit(val, 1 , memory_order_relaxed);
}
static inline bool croaring_refcount_dec(croaring_refcount_t *val) {
// It is important to enforce any possible access to the object in one
// thread (through an existing reference) to happen before deleting the
// object in a different thread. This is achieved by a "release" operation
// after dropping a reference (any access to the object through this
// reference must obviously happened before), and an "acquire" operation
// before deleting the object.
bool is_zero = atomic_fetch_sub_explicit(val, 1 , memory_order_release) == 1 ;
if (is_zero) {
atomic_thread_fence(memory_order_acquire);
}
return is_zero;
}
static inline uint32_t croaring_refcount_get(const croaring_refcount_t *val) {
return atomic_load_explicit(val, memory_order_relaxed);
}
#elif CROARING_ATOMIC_IMPL == CROARING_ATOMIC_IMPL_CPP
#include <atomic>
typedef std::atomic<uint32_t> croaring_refcount_t;
static inline void croaring_refcount_inc(croaring_refcount_t *val) {
val->fetch_add(1 , std::memory_order_relaxed);
}
static inline bool croaring_refcount_dec(croaring_refcount_t *val) {
// See above comments on the c11 atomic implementation for memory ordering
bool is_zero = val->fetch_sub(1 , std::memory_order_release) == 1 ;
if (is_zero) {
std::atomic_thread_fence(std::memory_order_acquire);
}
return is_zero;
}
static inline uint32_t croaring_refcount_get(const croaring_refcount_t *val) {
return val->load(std::memory_order_relaxed);
}
#elif CROARING_ATOMIC_IMPL == CROARING_ATOMIC_IMPL_C_WINDOWS
#include <intrin.h>
#pragma intrinsic(_InterlockedIncrement)
#pragma intrinsic(_InterlockedDecrement)
// _InterlockedIncrement and _InterlockedDecrement take a (signed) long, and
// overflow is defined to wrap, so we can pretend it is a uint32_t for our case
typedef volatile long croaring_refcount_t;
static inline void croaring_refcount_inc(croaring_refcount_t *val) {
_InterlockedIncrement(val);
}
static inline bool croaring_refcount_dec(croaring_refcount_t *val) {
return _InterlockedDecrement(val) == 0 ;
}
static inline uint32_t croaring_refcount_get(const croaring_refcount_t *val) {
// Per
// https://learn.microsoft.com/en-us/windows/win32/sync/interlocked-variable-access
// > Simple reads and writes to properly-aligned 32-bit variables are atomic
// > operations. In other words, you will not end up with only one portion
// > of the variable updated; all bits are updated in an atomic fashion.
return *val;
}
#elif CROARING_ATOMIC_IMPL == CROARING_ATOMIC_IMPL_NONE
#include <assert.h>
typedef uint32_t croaring_refcount_t;
static inline void croaring_refcount_inc(croaring_refcount_t *val) {
*val += 1 ;
}
static inline bool croaring_refcount_dec(croaring_refcount_t *val) {
assert(*val > 0 );
*val -= 1 ;
return val == 0 ;
}
static inline uint32_t croaring_refcount_get(const croaring_refcount_t *val) {
return *val;
}
#else
#error "Unknown atomic implementation"
#endif
#if defined (__GNUC__) || defined (__clang__)
#define CROARING_DEPRECATED __attribute__((deprecated))
#elif defined (_MSC_VER)
#define CROARING_DEPRECATED __declspec(deprecated)
#else
#define CROARING_DEPRECATED
#endif // defined(__GNUC__) || defined(__clang__)
// We want to initialize structs to zero portably (C and C++), without
// warnings. We can do mystruct s = CROARING_ZERO_INITIALIZER;
#ifdef __cplusplus
#define CROARING_ZERO_INITIALIZER \
{}
#else
#define CROARING_ZERO_INITIALIZER \
{ 0 }
#endif
#if defined (__cplusplus)
#define CROARING_STATIC_ASSERT(x, y) static_assert(x, y)
#else
#define CROARING_STATIC_ASSERT(x, y) _Static_assert(x, y)
#endif
// We need portability.h to be included first,
// but we also always want isadetection.h to be
// included (right after).
// See https://github.com/RoaringBitmap/CRoaring/issues/394
// There is no scenario where we want portability.h to
// be included, but not isadetection.h: the latter is a
// strict requirement.
#endif /* INCLUDE_PORTABILITY_H_ */
/* end file include/roaring/portability.h */
/* begin file include/roaring/roaring_types.h */
/*
Typedefs used by various components
*/
#ifndef ROARING_TYPES_H
#define ROARING_TYPES_H
#include <stdbool.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
namespace roaring {
namespace api {
#endif
/**
* When building . c files as C + + , there ' s added compile - time checking if the
* container types are derived from a ` container_t ` base class . So long as
* such a base class is empty , the struct will behave compatibly with C structs
* despite the derivation . This is due to the Empty Base Class Optimization :
*
* https : //en.cppreference.com/w/cpp/language/ebo
*
* But since C isn ' t namespaced , taking ` container_t ` globally might collide
* with other projects . So roaring . h uses ROARING_CONTAINER_T , while internal
* code # undefs that after declaring ` typedef ROARING_CONTAINER_T container_t ; `
*/
#if defined (__cplusplus)
extern "C++" {
struct container_s {};
}
#define ROARING_CONTAINER_T ::roaring::api::container_s
#else
#define ROARING_CONTAINER_T void // no compile-time checking
#endif
#define ROARING_FLAG_COW UINT8_C(0 x1)
#define ROARING_FLAG_FROZEN UINT8_C(0 x2)
/**
* Roaring arrays are array - based key - value pairs having containers as values
* and 16 - bit integer keys . A roaring bitmap might be implemented as such .
*/
// parallel arrays. Element sizes quite different.
// Alternative is array
// of structs. Which would have better
// cache performance through binary searches?
typedef struct roaring_array_s {
int32_t size;
int32_t allocation_size;
ROARING_CONTAINER_T **containers; // Use container_t in non-API files!
uint16_t *keys;
uint8_t *typecodes;
uint8_t flags;
} roaring_array_t;
typedef bool (*roaring_iterator)(uint32_t value, void *param);
typedef bool (*roaring_iterator64)(uint64_t value, void *param);
/**
* ( For advanced users . )
* The roaring_statistics_t can be used to collect detailed statistics about
* the composition of a roaring bitmap .
*/
typedef struct roaring_statistics_s {
uint32_t n_containers; /* number of containers */
uint32_t n_array_containers; /* number of array containers */
uint32_t n_run_containers; /* number of run containers */
uint32_t n_bitset_containers; /* number of bitmap containers */
uint32_t
n_values_array_containers; /* number of values in array containers */
uint32_t n_values_run_containers; /* number of values in run containers */
uint32_t
n_values_bitset_containers; /* number of values in bitmap containers */
uint32_t n_bytes_array_containers; /* number of allocated bytes in array
containers */
uint32_t n_bytes_run_containers; /* number of allocated bytes in run
containers */
uint32_t n_bytes_bitset_containers; /* number of allocated bytes in bitmap
containers */
uint32_t
max_value; /* the maximal value, undefined if cardinality is zero */
uint32_t
min_value; /* the minimal value, undefined if cardinality is zero */
CROARING_DEPRECATED
uint64_t sum_value; /* deprecated always zero */
uint64_t cardinality; /* total number of values stored in the bitmap */
// and n_values_arrays, n_values_rle, n_values_bitmap
} roaring_statistics_t;
/**
* ( For advanced users . )
* The roaring64_statistics_t can be used to collect detailed statistics about
* the composition of a roaring64 bitmap .
*/
typedef struct roaring64_statistics_s {
uint64_t n_containers; /* number of containers */
uint64_t n_array_containers; /* number of array containers */
uint64_t n_run_containers; /* number of run containers */
uint64_t n_bitset_containers; /* number of bitmap containers */
uint64_t
n_values_array_containers; /* number of values in array containers */
uint64_t n_values_run_containers; /* number of values in run containers */
uint64_t
n_values_bitset_containers; /* number of values in bitmap containers */
uint64_t n_bytes_array_containers; /* number of allocated bytes in array
containers */
uint64_t n_bytes_run_containers; /* number of allocated bytes in run
containers */
uint64_t n_bytes_bitset_containers; /* number of allocated bytes in bitmap
containers */
uint64_t
max_value; /* the maximal value, undefined if cardinality is zero */
uint64_t
min_value; /* the minimal value, undefined if cardinality is zero */
uint64_t cardinality; /* total number of values stored in the bitmap */
// and n_values_arrays, n_values_rle, n_values_bitmap
} roaring64_statistics_t;
/**
* Roaring - internal type used to iterate within a roaring container .
*/
typedef struct roaring_container_iterator_s {
// For bitset and array containers this is the index of the bit / entry.
// For run containers this points at the run.
int32_t index;
} roaring_container_iterator_t;
#ifdef __cplusplus
}
}
} // extern "C" { namespace roaring { namespace api {
#endif
#endif /* ROARING_TYPES_H */
/* end file include/roaring/roaring_types.h */
/* begin file include/roaring/bitset/bitset.h */
#ifndef CROARING_CBITSET_BITSET_H
#define CROARING_CBITSET_BITSET_H
// For compatibility with MSVC with the use of `restrict`
#if (__STDC_VERSION__ >= 199901 L) || \
(defined (__GNUC__) && defined (__STDC_VERSION__))
#define CROARING_CBITSET_RESTRICT restrict
#else
#define CROARING_CBITSET_RESTRICT
#endif // (__STDC_VERSION__ >= 199901L) || (defined(__GNUC__) &&
// defined(__STDC_VERSION__ ))
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef __cplusplus
extern "C" {
namespace roaring {
namespace api {
#endif
struct bitset_s {
uint64_t *CROARING_CBITSET_RESTRICT array;
/* For simplicity and performance, we prefer to have a size and a capacity
* that is a multiple of 64 bits . Thus we only track the size and the
* capacity in terms of 64-bit words allocated */
size_t arraysize;
size_t capacity;
};
typedef struct bitset_s bitset_t;
/* Create a new bitset. Return NULL in case of failure. */
static bitset_t *bitset_create(void );
/* Create a new bitset able to contain size bits. Return NULL in case of
* failure. */
static bitset_t *bitset_create_with_capacity(size_t size);
/* Free memory. */
static void bitset_free(bitset_t *bitset);
/* Set all bits to zero. */
static void bitset_clear(bitset_t *bitset);
/* Set all bits to one. */
static void bitset_fill(bitset_t *bitset);
/* Create a copy */
static bitset_t *bitset_copy(const bitset_t *bitset);
/* For advanced users: Resize the bitset so that it can support newarraysize *
* 64 bits . Return true in case of success , false for failure . Pad with zeroes
* new buffer areas if requested. */
static bool bitset_resize(bitset_t *bitset, size_t newarraysize, bool padwithzeroes);
/* returns how many bytes of memory the backend buffer uses */
static inline size_t bitset_size_in_bytes(const bitset_t *bitset) {
return bitset->arraysize * sizeof (uint64_t);
}
/* returns how many bits can be accessed */
static inline size_t bitset_size_in_bits(const bitset_t *bitset) {
return bitset->arraysize * 64 ;
}
/* returns how many words (64-bit) of memory the backend buffer uses */
static inline size_t bitset_size_in_words(const bitset_t *bitset) {
return bitset->arraysize;
}
/* For advanced users: Grow the bitset so that it can support newarraysize * 64
* bits with padding. Return true in case of success, false for failure. */
static bool bitset_grow(bitset_t *bitset, size_t newarraysize);
/* attempts to recover unused memory, return false in case of
* roaring_reallocation failure */
static bool bitset_trim(bitset_t *bitset);
/* shifts all bits by 's' positions so that the bitset representing values
* 1,2,10 would represent values 1+s, 2+s, 10+s */
static void bitset_shift_left(bitset_t *bitset, size_t s);
/* shifts all bits by 's' positions so that the bitset representing values
* 1,2,10 would represent values 1-s, 2-s, 10-s, negative values are deleted */
static void bitset_shift_right(bitset_t *bitset, size_t s);
/* Set the ith bit. Attempts to resize the bitset if needed (may silently fail)
*/
static inline void bitset_set(bitset_t *bitset, size_t i) {
size_t shiftedi = i / 64 ;
if (shiftedi >= bitset->arraysize) {
if (!bitset_grow(bitset, shiftedi + 1 )) {
return ;
}
}
bitset->array[shiftedi] |= ((uint64_t)1 ) << (i % 64 );
}
/* Set the ith bit to the specified value. Attempts to resize the bitset if
* needed (may silently fail) */
static inline void bitset_set_to_value(bitset_t *bitset, size_t i, bool flag) {
size_t shiftedi = i / 64 ;
uint64_t mask = ((uint64_t)1 ) << (i % 64 );
uint64_t dynmask = ((uint64_t)flag) << (i % 64 );
if (shiftedi >= bitset->arraysize) {
if (!bitset_grow(bitset, shiftedi + 1 )) {
return ;
}
}
uint64_t w = bitset->array[shiftedi];
w &= ~mask;
w |= dynmask;
bitset->array[shiftedi] = w;
}
/* Get the value of the ith bit. */
static inline bool bitset_get(const bitset_t *bitset, size_t i) {
size_t shiftedi = i / 64 ;
if (shiftedi >= bitset->arraysize) {
return false ;
}
return (bitset->array[shiftedi] & (((uint64_t)1 ) << (i % 64 ))) != 0 ;
}
/* Count number of bits set. */
static size_t bitset_count(const bitset_t *bitset);
/* Returns true if no bit is set. */
static bool bitset_empty(const bitset_t *bitset);
/* Find the index of the first bit set. Or SIZE_MAX if the bitset is empty. */
static size_t bitset_minimum(const bitset_t *bitset);
/* Find the index of the last bit set. Or zero if the bitset is empty. */
static size_t bitset_maximum(const bitset_t *bitset);
/* compute the union in-place (to b1), returns true if successful, to generate a
* new bitset first call bitset_copy */
static bool bitset_inplace_union(bitset_t *CROARING_CBITSET_RESTRICT b1,
const bitset_t *CROARING_CBITSET_RESTRICT b2);
/* report the size of the union (without materializing it) */
static size_t bitset_union_count(const bitset_t *CROARING_CBITSET_RESTRICT b1,
const bitset_t *CROARING_CBITSET_RESTRICT b2);
/* compute the intersection in-place (to b1), to generate a new bitset first
* call bitset_copy */
static void bitset_inplace_intersection(bitset_t *CROARING_CBITSET_RESTRICT b1,
const bitset_t *CROARING_CBITSET_RESTRICT b2);
/* report the size of the intersection (without materializing it) */
static size_t bitset_intersection_count(const bitset_t *CROARING_CBITSET_RESTRICT b1,
const bitset_t *CROARING_CBITSET_RESTRICT b2);
/* returns true if the bitsets contain no common elements */
static bool bitsets_disjoint(const bitset_t *CROARING_CBITSET_RESTRICT b1,
const bitset_t *CROARING_CBITSET_RESTRICT b2);
/* returns true if the bitsets contain any common elements */
static bool bitsets_intersect(const bitset_t *CROARING_CBITSET_RESTRICT b1,
const bitset_t *CROARING_CBITSET_RESTRICT b2);
/* returns true if b1 contains all of the set bits of b2 */
static bool bitset_contains_all(const bitset_t *CROARING_CBITSET_RESTRICT b1,
const bitset_t *CROARING_CBITSET_RESTRICT b2);
/* compute the difference in-place (to b1), to generate a new bitset first call
* bitset_copy */
static void bitset_inplace_difference(bitset_t *CROARING_CBITSET_RESTRICT b1,
const bitset_t *CROARING_CBITSET_RESTRICT b2);
/* compute the size of the difference */
static size_t bitset_difference_count(const bitset_t *CROARING_CBITSET_RESTRICT b1,
const bitset_t *CROARING_CBITSET_RESTRICT b2);
/* compute the symmetric difference in-place (to b1), return true if successful,
* to generate a new bitset first call bitset_copy */
static bool bitset_inplace_symmetric_difference(
bitset_t *CROARING_CBITSET_RESTRICT b1,
const bitset_t *CROARING_CBITSET_RESTRICT b2);
/* compute the size of the symmetric difference */
static size_t bitset_symmetric_difference_count(
const bitset_t *CROARING_CBITSET_RESTRICT b1,
const bitset_t *CROARING_CBITSET_RESTRICT b2);
/* iterate over the set bits
like so :
for ( size_t i = 0 ; bitset_next_set_bit ( b , & i ) ; i + + ) {
//.....
}
*/
static inline bool bitset_next_set_bit(const bitset_t *bitset, size_t *i) {
size_t x = *i / 64 ;
if (x >= bitset->arraysize) {
return false ;
}
uint64_t w = bitset->array[x];
w >>= (*i & 63 );
if (w != 0 ) {
*i += roaring_trailing_zeroes(w);
return true ;
}
x++;
while (x < bitset->arraysize) {
w = bitset->array[x];
if (w != 0 ) {
*i = x * 64 + roaring_trailing_zeroes(w);
return true ;
}
x++;
}
return false ;
}
/* iterate over the set bits
like so :
size_t buffer [ 256 ] ;
size_t howmany = 0 ;
for ( size_t startfrom = 0 ; ( howmany = bitset_next_set_bits ( b , buffer , 256 ,
& startfrom ) ) > 0 ; startfrom + + ) {
//.....
}
*/
static inline size_t bitset_next_set_bits(const bitset_t *bitset, size_t *buffer,
size_t capacity, size_t *startfrom) {
if (capacity == 0 ) return 0 ; // sanity check
size_t x = *startfrom / 64 ;
if (x >= bitset->arraysize) {
return 0 ; // nothing more to iterate over
}
uint64_t w = bitset->array[x];
// unset low bits inside the word less than *startfrom
w &= ~((UINT64_C(1 ) << (*startfrom & 63 )) - 1 );
size_t howmany = 0 ;
size_t base = x << 6 ;
while (howmany < capacity) {
while (w != 0 ) {
uint64_t t = w & (~w + 1 );
int r = roaring_trailing_zeroes(w);
buffer[howmany++] = r + base;
if (howmany == capacity) goto end;
w ^= t;
}
x += 1 ;
if (x == bitset->arraysize) {
break ;
}
base += 64 ;
w = bitset->array[x];
}
end:
if (howmany > 0 ) {
*startfrom = buffer[howmany - 1 ];
}
return howmany;
}
typedef bool (*bitset_iterator)(size_t value, void *param);
// return true if uninterrupted
static inline bool bitset_for_each(const bitset_t *b, bitset_iterator iterator,
void *ptr) {
size_t base = 0 ;
for (size_t i = 0 ; i < b->arraysize; ++i) {
uint64_t w = b->array[i];
while (w != 0 ) {
uint64_t t = w & (~w + 1 );
int r = roaring_trailing_zeroes(w);
if (!iterator(r + base, ptr)) return false ;
w ^= t;
}
base += 64 ;
}
return true ;
}
static inline void bitset_print(const bitset_t *b) {
printf("{" );
for (size_t i = 0 ; bitset_next_set_bit(b, &i); i++) {
printf("%zu, " , i);
}
printf("}" );
}
#ifdef __cplusplus
}
}
} // extern "C" { namespace roaring { namespace api {
#endif
#endif
/* end file include/roaring/bitset/bitset.h */
/* begin file include/roaring/roaring.h */
/*
* An implementation of Roaring Bitmaps in C .
*/
#ifndef ROARING_H
#define ROARING_H
#include <stdbool.h>
#include <stddef.h> // for `size_t`
#include <stdint.h>
// Include other headers after roaring_types.h
#ifdef __cplusplus
extern "C" {
namespace roaring {
namespace api {
#endif
typedef struct roaring_bitmap_s {
roaring_array_t high_low_container;
} roaring_bitmap_t;
/**
* Dynamically allocates a new bitmap ( initially empty ) .
* Returns NULL if the allocation fails .
* Capacity is a performance hint for how many " containers " the data will need .
* Client is responsible for calling ` roaring_bitmap_free ( ) ` .
*/
static roaring_bitmap_t *roaring_bitmap_create_with_capacity(uint32_t cap);
/**
* Dynamically allocates a new bitmap ( initially empty ) .
* Returns NULL if the allocation fails .
* Client is responsible for calling ` roaring_bitmap_free ( ) ` .
*/
static inline roaring_bitmap_t *roaring_bitmap_create(void ) {
return roaring_bitmap_create_with_capacity(0 );
}
/**
* Initialize a roaring bitmap structure in memory controlled by client .
* Capacity is a performance hint for how many " containers " the data will need .
* Can return false if auxiliary allocations fail when capacity greater than 0 .
*/
static bool roaring_bitmap_init_with_capacity(roaring_bitmap_t *r, uint32_t cap);
/**
* Initialize a roaring bitmap structure in memory controlled by client .
* The bitmap will be in a " clear " state , with no auxiliary allocations .
* Since this performs no allocations , the function will not fail .
*/
static inline void roaring_bitmap_init_cleared(roaring_bitmap_t *r) {
roaring_bitmap_init_with_capacity(r, 0 );
}
/**
* Add all the values between min ( included ) and max ( excluded ) that are at a
* distance k * step from min .
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_from_range(uint64_t min, uint64_t max,
uint32_t step);
/**
* Creates a new bitmap from a pointer of uint32_t integers
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_of_ptr(size_t n_args, const uint32_t *vals);
/*
* Whether you want to use copy - on - write .
* Saves memory and avoids copies , but needs more care in a threaded context .
* Most users should ignore this flag .
*
* Note : If you do turn this flag to ' true ' , enabling COW , then ensure that you
* do so for all of your bitmaps , since interactions between bitmaps with and
* without COW is unsafe .
*/
static inline bool roaring_bitmap_get_copy_on_write(const roaring_bitmap_t *r) {
return r->high_low_container.flags & ROARING_FLAG_COW;
}
static inline void roaring_bitmap_set_copy_on_write(roaring_bitmap_t *r, bool cow) {
if (cow) {
r->high_low_container.flags |= ROARING_FLAG_COW;
} else {
r->high_low_container.flags &= ~ROARING_FLAG_COW;
}
}
/**
* Return a copy of the bitmap with all values shifted by offset .
* The returned pointer may be NULL in case of errors . The caller is responsible
* for freeing the return bitmap .
*/
static roaring_bitmap_t *roaring_bitmap_add_offset(const roaring_bitmap_t *bm,
int64_t offset);
/**
* Describe the inner structure of the bitmap .
*/
static void roaring_bitmap_printf_describe(const roaring_bitmap_t *r);
/**
* Creates a new bitmap from a list of uint32_t integers
*
* This function is deprecated , use ` roaring_bitmap_from ` instead , which
* doesn ' t require the number of elements to be passed in .
*
* @ see roaring_bitmap_from
*/
CROARING_DEPRECATED static roaring_bitmap_t *roaring_bitmap_of(size_t n, ...);
#ifdef __cplusplus
/**
* Creates a new bitmap which contains all values passed in as arguments .
*
* To create a bitmap from a variable number of arguments , use the
* ` roaring_bitmap_of_ptr ` function instead .
*/
// Use an immediately invoked closure, capturing by reference
// (in case __VA_ARGS__ refers to context outside the closure)
// Include a 0 at the beginning of the array to make the array length > 0
// (zero sized arrays are not valid in standard c/c++)
#define roaring_bitmap_from(...) \
[&]() { \
const uint32_t roaring_bitmap_from_array[] = {0 , __VA_ARGS__}; \
return roaring_bitmap_of_ptr((sizeof (roaring_bitmap_from_array) / \
sizeof (roaring_bitmap_from_array[0 ])) - \
1 , \
&roaring_bitmap_from_array[1 ]); \
}()
#else
/**
* Creates a new bitmap which contains all values passed in as arguments .
*
* To create a bitmap from a variable number of arguments , use the
* ` roaring_bitmap_of_ptr ` function instead .
*/
// While __VA_ARGS__ occurs twice in expansion, one of the times is in a sizeof
// expression, which is an unevaluated context, so it's even safe in the case
// where expressions passed have side effects (roaring64_bitmap_from(my_func(),
// ++i))
// Include a 0 at the beginning of the array to make the array length > 0
// (zero sized arrays are not valid in standard c/c++)
#define roaring_bitmap_from(...) \
roaring_bitmap_of_ptr( \
(sizeof ((const uint32_t[]){0 , __VA_ARGS__}) / sizeof (uint32_t)) - 1 , \
&((const uint32_t[]){0 , __VA_ARGS__})[1 ])
#endif
/**
* Copies a bitmap ( this does memory allocation ) .
* The caller is responsible for memory management .
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_copy(const roaring_bitmap_t *r);
/**
* Copies a bitmap from src to dest . It is assumed that the pointer dest
* is to an already allocated bitmap . The content of the dest bitmap is
* freed / deleted .
*
* It might be preferable and simpler to call roaring_bitmap_copy except
* that roaring_bitmap_overwrite can save on memory allocations .
*
* Returns true if successful , or false if there was an error . On failure ,
* the dest bitmap is left in a valid , empty state ( even if it was not empty
* before ) .
*/
static bool roaring_bitmap_overwrite(roaring_bitmap_t *dest,
const roaring_bitmap_t *src);
/**
* Print the content of the bitmap .
*/
static void roaring_bitmap_printf(const roaring_bitmap_t *r);
/**
* Computes the intersection between two bitmaps and returns new bitmap . The
* caller is responsible for memory management .
*
* Performance hint : if you are computing the intersection between several
* bitmaps , two - by - two , it is best to start with the smallest bitmap .
* You may also rely on roaring_bitmap_and_inplace to avoid creating
* many temporary bitmaps .
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_and(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Computes the size of the intersection between two bitmaps .
*/
static uint64_t roaring_bitmap_and_cardinality(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Check whether two bitmaps intersect .
*/
static bool roaring_bitmap_intersect(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Check whether a bitmap and an open range intersect .
*/
static bool roaring_bitmap_intersect_with_range(const roaring_bitmap_t *bm, uint64_t x,
uint64_t y);
/**
* Computes the Jaccard index between two bitmaps . ( Also known as the Tanimoto
* distance , or the Jaccard similarity coefficient )
*
* The Jaccard index is undefined if both bitmaps are empty .
*/
static double roaring_bitmap_jaccard_index(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Computes the size of the union between two bitmaps .
*/
static uint64_t roaring_bitmap_or_cardinality(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Computes the size of the difference ( andnot ) between two bitmaps .
*/
static uint64_t roaring_bitmap_andnot_cardinality(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Computes the size of the symmetric difference ( xor ) between two bitmaps .
*/
static uint64_t roaring_bitmap_xor_cardinality(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Inplace version of ` roaring_bitmap_and ( ) ` , modifies r1
* r1 = = r2 is allowed .
*
* Performance hint : if you are computing the intersection between several
* bitmaps , two - by - two , it is best to start with the smallest bitmap .
*/
static void roaring_bitmap_and_inplace(roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Computes the union between two bitmaps and returns new bitmap . The caller is
* responsible for memory management .
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_or(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Inplace version of ` roaring_bitmap_or ( ) , modifies r1 .
* TODO : decide whether r1 = = r2 ok
*/
static void roaring_bitmap_or_inplace(roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Compute the union of ' number ' bitmaps .
* Caller is responsible for freeing the result .
* See also ` roaring_bitmap_or_many_heap ( ) `
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_or_many(size_t number,
const roaring_bitmap_t **rs);
/**
* Compute the union of ' number ' bitmaps using a heap . This can sometimes be
* faster than ` roaring_bitmap_or_many ( ) which uses a naive algorithm .
* Caller is responsible for freeing the result .
*/
static roaring_bitmap_t *roaring_bitmap_or_many_heap(uint32_t number,
const roaring_bitmap_t **rs);
/**
* Computes the symmetric difference ( xor ) between two bitmaps
* and returns new bitmap . The caller is responsible for memory management .
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_xor(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Inplace version of roaring_bitmap_xor , modifies r1 , r1 ! = r2 .
*/
static void roaring_bitmap_xor_inplace(roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Compute the xor of ' number ' bitmaps .
* Caller is responsible for freeing the result .
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_xor_many(size_t number,
const roaring_bitmap_t **rs);
/**
* Computes the difference ( andnot ) between two bitmaps and returns new bitmap .
* Caller is responsible for freeing the result .
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_andnot(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Inplace version of roaring_bitmap_andnot , modifies r1 , r1 ! = r2 .
*/
static void roaring_bitmap_andnot_inplace(roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* TODO : consider implementing :
*
* " Compute the xor of ' number ' bitmaps using a heap . This can sometimes be
* faster than roaring_bitmap_xor_many which uses a naive algorithm . Caller is
* responsible for freeing the result . " "
*
* roaring_bitmap_t * roaring_bitmap_xor_many_heap ( uint32_t number ,
* const roaring_bitmap_t * * rs ) ;
*/
/**
* Frees the memory .
*/
static void roaring_bitmap_free(const roaring_bitmap_t *r);
/**
* A bit of context usable with ` roaring_bitmap_ * _ bulk ( ) ` functions
*
* Should be initialized with ` { 0 } ` ( or ` memset ( ) ` to all zeros ) .
* Callers should treat it as an opaque type .
*
* A context may only be used with a single bitmap
* ( unless re - initialized to zero ) , and any modification to a bitmap
* ( other than modifications performed with ` _ bulk ( ) ` functions with the context
* passed ) will invalidate any contexts associated with that bitmap .
*/
typedef struct roaring_bulk_context_s {
ROARING_CONTAINER_T *container;
int idx;
uint16_t key;
uint8_t typecode;
} roaring_bulk_context_t;
/**
* Add an item , using context from a previous insert for speed optimization .
*
* ` context ` will be used to store information between calls to make bulk
* operations faster . ` * context ` should be zero - initialized before the first
* call to this function .
*
* Modifying the bitmap in any way ( other than ` - bulk ` suffixed functions )
* will invalidate the stored context , calling this function with a non - zero
* context after doing any modification invokes undefined behavior .
*
* In order to exploit this optimization , the caller should call this function
* with values with the same " key " ( high 16 bits of the value ) consecutively .
*/
static void roaring_bitmap_add_bulk(roaring_bitmap_t *r,
roaring_bulk_context_t *context, uint32_t val);
/**
* Add value n_args from pointer vals , faster than repeatedly calling
* ` roaring_bitmap_add ( ) `
*
* In order to exploit this optimization , the caller should attempt to keep
* values with the same " key " ( high 16 bits of the value ) as consecutive
* elements in ` vals `
*/
static void roaring_bitmap_add_many(roaring_bitmap_t *r, size_t n_args,
const uint32_t *vals);
/**
* Add value x
*/
static void roaring_bitmap_add(roaring_bitmap_t *r, uint32_t x);
/**
* Add value x
* Returns true if a new value was added , false if the value already existed .
*/
static bool roaring_bitmap_add_checked(roaring_bitmap_t *r, uint32_t x);
/**
* Add all values in range [ min , max ]
*/
static void roaring_bitmap_add_range_closed(roaring_bitmap_t *r, uint32_t min,
uint32_t max);
/**
* Add all values in range [ min , max )
*/
static inline void roaring_bitmap_add_range(roaring_bitmap_t *r, uint64_t min,
uint64_t max) {
if (max <= min || min > (uint64_t)UINT32_MAX + 1 ) {
return ;
}
roaring_bitmap_add_range_closed(r, (uint32_t)min, (uint32_t)(max - 1 ));
}
/**
* Remove value x
*/
static void roaring_bitmap_remove(roaring_bitmap_t *r, uint32_t x);
/**
* Remove all values in range [ min , max ]
*/
static void roaring_bitmap_remove_range_closed(roaring_bitmap_t *r, uint32_t min,
uint32_t max);
/**
* Remove all values in range [ min , max )
*/
static inline void roaring_bitmap_remove_range(roaring_bitmap_t *r, uint64_t min,
uint64_t max) {
if (max <= min || min > (uint64_t)UINT32_MAX + 1 ) {
return ;
}
roaring_bitmap_remove_range_closed(r, (uint32_t)min, (uint32_t)(max - 1 ));
}
/**
* Remove multiple values
*/
static void roaring_bitmap_remove_many(roaring_bitmap_t *r, size_t n_args,
const uint32_t *vals);
/**
* Remove value x
* Returns true if a new value was removed , false if the value was not existing .
*/
static bool roaring_bitmap_remove_checked(roaring_bitmap_t *r, uint32_t x);
/**
* Check if value is present
*/
static bool roaring_bitmap_contains(const roaring_bitmap_t *r, uint32_t val);
/**
* Check whether a range of values from range_start ( included )
* to range_end ( excluded ) is present
*/
static bool roaring_bitmap_contains_range(const roaring_bitmap_t *r,
uint64_t range_start, uint64_t range_end);
/**
* Check whether a range of values from range_start ( included )
* to range_end ( included ) is present
*/
static bool roaring_bitmap_contains_range_closed(const roaring_bitmap_t *r,
uint32_t range_start,
uint32_t range_end);
/**
* Check if an items is present , using context from a previous insert or search
* for speed optimization .
*
* ` context ` will be used to store information between calls to make bulk
* operations faster . ` * context ` should be zero - initialized before the first
* call to this function .
*
* Modifying the bitmap in any way ( other than ` - bulk ` suffixed functions )
* will invalidate the stored context , calling this function with a non - zero
* context after doing any modification invokes undefined behavior .
*
* In order to exploit this optimization , the caller should call this function
* with values with the same " key " ( high 16 bits of the value ) consecutively .
*/
static bool roaring_bitmap_contains_bulk(const roaring_bitmap_t *r,
roaring_bulk_context_t *context,
uint32_t val);
/**
* Get the cardinality of the bitmap ( number of elements ) .
*/
static uint64_t roaring_bitmap_get_cardinality(const roaring_bitmap_t *r);
/**
* Returns the number of elements in the range [ range_start , range_end ) .
*/
static uint64_t roaring_bitmap_range_cardinality(const roaring_bitmap_t *r,
uint64_t range_start,
uint64_t range_end);
/**
* Returns the number of elements in the range [ range_start , range_end ] .
*/
static uint64_t roaring_bitmap_range_cardinality_closed(const roaring_bitmap_t *r,
uint32_t range_start,
uint32_t range_end);
/**
* Returns true if the bitmap is empty ( cardinality is zero ) .
*/
static bool roaring_bitmap_is_empty(const roaring_bitmap_t *r);
/**
* Empties the bitmap . It will have no auxiliary allocations ( so if the bitmap
* was initialized in client memory via roaring_bitmap_init ( ) , then a call to
* roaring_bitmap_clear ( ) would be enough to " free " it )
*/
static void roaring_bitmap_clear(roaring_bitmap_t *r);
/**
* Convert the bitmap to a sorted array , output in ` ans ` .
*
* Caller is responsible to ensure that there is enough memory allocated , e . g .
*
* ans = malloc ( roaring_bitmap_get_cardinality ( bitmap ) * sizeof ( uint32_t ) ) ;
*/
static void roaring_bitmap_to_uint32_array(const roaring_bitmap_t *r, uint32_t *ans);
/**
* Store the bitmap to a bitset . This can be useful for people
* who need the performance and simplicity of a standard bitset .
* We assume that the input bitset is originally empty ( does not
* have any set bit ) .
*
* bitset_t * out = bitset_create ( ) ;
* // if the bitset has content in it, call "bitset_clear(out)"
* bool success = roaring_bitmap_to_bitset ( mybitmap , out ) ;
* // on failure, success will be false.
* // You can then query the bitset:
* bool is_present = bitset_get ( out , 10011 ) ;
* // you must free the memory:
* bitset_free ( out ) ;
*
*/
static bool roaring_bitmap_to_bitset(const roaring_bitmap_t *r, bitset_t *bitset);
/**
* Convert the bitmap to a sorted array from ` offset ` by ` limit ` , output in
* ` ans ` .
*
* Caller is responsible to ensure that there is enough memory allocated , e . g .
*
* ans = malloc ( roaring_bitmap_get_cardinality ( limit ) * sizeof ( uint32_t ) ) ;
*
* Return false in case of failure ( e . g . , insufficient memory )
*/
static bool roaring_bitmap_range_uint32_array(const roaring_bitmap_t *r, size_t offset,
size_t limit, uint32_t *ans);
/**
* Remove run - length encoding even when it is more space efficient .
* Return whether a change was applied .
*/
static bool roaring_bitmap_remove_run_compression(roaring_bitmap_t *r);
/**
* Convert array and bitmap containers to run containers when it is more
* efficient ; also convert from run containers when more space efficient .
*
* Returns true if the result has at least one run container .
* Additional savings might be possible by calling ` shrinkToFit ( ) ` .
*/
static bool roaring_bitmap_run_optimize(roaring_bitmap_t *r);
/**
* If needed , reallocate memory to shrink the memory usage .
* Returns the number of bytes saved .
*/
static size_t roaring_bitmap_shrink_to_fit(roaring_bitmap_t *r);
/**
* Write the bitmap to an output pointer , this output buffer should refer to
* at least ` roaring_bitmap_size_in_bytes ( r ) ` allocated bytes .
*
* See ` roaring_bitmap_portable_serialize ( ) ` if you want a format that ' s
* compatible with Java and Go implementations . This format can sometimes be
* more space efficient than the portable form , e . g . when the data is sparse .
*
* Returns how many bytes written , should be ` roaring_bitmap_size_in_bytes ( r ) ` .
*
* This function is endian - sensitive . If you have a big - endian system ( e . g . , a
* mainframe IBM s390x ) , the data format is going to be big - endian and not
* compatible with little - endian systems .
*
* When serializing data to a file , we recommend that you also use
* checksums so that , at deserialization , you can be confident
* that you are recovering the correct data .
*/
static size_t roaring_bitmap_serialize(const roaring_bitmap_t *r, char *buf);
/**
* Use with ` roaring_bitmap_serialize ( ) ` .
*
* ( See ` roaring_bitmap_portable_deserialize ( ) ` if you want a format that ' s
* compatible with Java and Go implementations ) .
*
* This function is endian - sensitive . If you have a big - endian system ( e . g . , a
* mainframe IBM s390x ) , the data format is going to be big - endian and not
* compatible with little - endian systems .
*
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_deserialize(const void *buf);
/**
* Use with ` roaring_bitmap_serialize ( ) ` .
*
* ( See ` roaring_bitmap_portable_deserialize_safe ( ) ` if you want a format that ' s
* compatible with Java and Go implementations ) .
*
* This function is endian - sensitive . If you have a big - endian system ( e . g . , a
* mainframe IBM s390x ) , the data format is going to be big - endian and not
* compatible with little - endian systems .
*
* The difference with ` roaring_bitmap_deserialize ( ) ` is that this function
* checks that the input buffer is a valid bitmap . If the buffer is too small ,
* NULL is returned .
*
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_deserialize_safe(const void *buf,
size_t maxbytes);
/**
* How many bytes are required to serialize this bitmap ( NOT compatible
* with Java and Go versions )
*/
static size_t roaring_bitmap_size_in_bytes(const roaring_bitmap_t *r);
/**
* Read bitmap from a serialized buffer .
* In case of failure , NULL is returned .
*
* This function is unsafe in the sense that if there is no valid serialized
* bitmap at the pointer , then many bytes could be read , possibly causing a
* buffer overflow . See also roaring_bitmap_portable_deserialize_safe ( ) .
*
* This is meant to be compatible with the Java and Go versions :
* https : //github.com/RoaringBitmap/RoaringFormatSpec
*
* This function is endian - sensitive . If you have a big - endian system ( e . g . , a
* mainframe IBM s390x ) , the data format is going to be big - endian and not
* compatible with little - endian systems .
*
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_portable_deserialize(const char *buf);
/**
* Read bitmap from a serialized buffer safely ( reading up to maxbytes ) .
* In case of failure , NULL is returned .
*
* This is meant to be compatible with the Java and Go versions :
* https : //github.com/RoaringBitmap/RoaringFormatSpec
*
* The function itself is safe in the sense that it will not cause buffer
* overflows : it will not read beyond the scope of the provided buffer
* ( buf , maxbytes ) .
*
* However , for correct operations , it is assumed that the bitmap
* read was once serialized from a valid bitmap ( i . e . , it follows the format
* specification ) . If you provided an incorrect input ( garbage ) , then the bitmap
* read may not be in a valid state and following operations may not lead to
* sensible results . In particular , the serialized array containers need to be
* in sorted order , and the run containers should be in sorted non - overlapping
* order . This is is guaranteed to happen when serializing an existing bitmap ,
* but not for random inputs .
*
* If the source is untrusted , you should call
* roaring_bitmap_internal_validate to check the validity of the
* bitmap prior to using it . Only after calling roaring_bitmap_internal_validate
* is the bitmap considered safe for use .
*
* We also recommend that you use checksums to check that serialized data
* corresponds to the serialized bitmap . The CRoaring library does not provide
* checksumming .
*
* This function is endian - sensitive . If you have a big - endian system ( e . g . , a
* mainframe IBM s390x ) , the data format is going to be big - endian and not
* compatible with little - endian systems .
*
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_portable_deserialize_safe(const char *buf,
size_t maxbytes);
/**
* Read bitmap from a serialized buffer .
* In case of failure , NULL is returned .
*
* Bitmap returned by this function can be used in all readonly contexts .
* Bitmap must be freed as usual , by calling roaring_bitmap_free ( ) .
* Underlying buffer must not be freed or modified while it backs any bitmaps .
*
* The function is unsafe in the following ways :
* 1 ) It may execute unaligned memory accesses .
* 2 ) A buffer overflow may occur if buf does not point to a valid serialized
* bitmap .
*
* This is meant to be compatible with the Java and Go versions :
* https : //github.com/RoaringBitmap/RoaringFormatSpec
*
* This function is endian - sensitive . If you have a big - endian system ( e . g . , a
* mainframe IBM s390x ) , the data format is going to be big - endian and not
* compatible with little - endian systems .
*
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_portable_deserialize_frozen(const char *buf);
/**
* Check how many bytes would be read ( up to maxbytes ) at this pointer if there
* is a bitmap , returns zero if there is no valid bitmap .
*
* This is meant to be compatible with the Java and Go versions :
* https : //github.com/RoaringBitmap/RoaringFormatSpec
*/
static size_t roaring_bitmap_portable_deserialize_size(const char *buf,
size_t maxbytes);
/**
* How many bytes are required to serialize this bitmap .
*
* This is meant to be compatible with the Java and Go versions :
* https : //github.com/RoaringBitmap/RoaringFormatSpec
*/
static size_t roaring_bitmap_portable_size_in_bytes(const roaring_bitmap_t *r);
/**
* Write a bitmap to a char buffer . The output buffer should refer to at least
* ` roaring_bitmap_portable_size_in_bytes ( r ) ` bytes of allocated memory .
*
* Returns how many bytes were written which should match
* ` roaring_bitmap_portable_size_in_bytes ( r ) ` .
*
* This is meant to be compatible with the Java and Go versions :
* https : //github.com/RoaringBitmap/RoaringFormatSpec
*
* This function is endian - sensitive . If you have a big - endian system ( e . g . , a
* mainframe IBM s390x ) , the data format is going to be big - endian and not
* compatible with little - endian systems .
*
* When serializing data to a file , we recommend that you also use
* checksums so that , at deserialization , you can be confident
* that you are recovering the correct data .
*/
static size_t roaring_bitmap_portable_serialize(const roaring_bitmap_t *r, char *buf);
/*
* " Frozen " serialization format imitates memory layout of roaring_bitmap_t .
* Deserialized bitmap is a constant view of the underlying buffer .
* This significantly reduces amount of allocations and copying required during
* deserialization .
* It can be used with memory mapped files .
* Example can be found in benchmarks / frozen_benchmark . c
*
* [ # # # # # ] const roaring_bitmap_t *
* | | |
* + - - - - + | + - +
* | | |
* [ # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # ] underlying buffer
*
* Note that because frozen serialization format imitates C memory layout
* of roaring_bitmap_t , it is not fixed . It is different on big / little endian
* platforms and can be changed in future .
*/
/**
* Returns number of bytes required to serialize bitmap using frozen format .
*/
static size_t roaring_bitmap_frozen_size_in_bytes(const roaring_bitmap_t *r);
/**
* Serializes bitmap using frozen format .
* Buffer size must be at least roaring_bitmap_frozen_size_in_bytes ( ) .
*
* This function is endian - sensitive . If you have a big - endian system ( e . g . , a
* mainframe IBM s390x ) , the data format is going to be big - endian and not
* compatible with little - endian systems .
*
* When serializing data to a file , we recommend that you also use
* checksums so that , at deserialization , you can be confident
* that you are recovering the correct data .
*/
static void roaring_bitmap_frozen_serialize(const roaring_bitmap_t *r, char *buf);
/**
* Creates constant bitmap that is a view of a given buffer .
* Buffer data should have been written by ` roaring_bitmap_frozen_serialize ( ) `
* Its beginning must also be aligned by 32 bytes .
* Length must be equal exactly to ` roaring_bitmap_frozen_size_in_bytes ( ) ` .
* In case of failure , NULL is returned .
*
* Bitmap returned by this function can be used in all readonly contexts .
* Bitmap must be freed as usual , by calling roaring_bitmap_free ( ) .
* Underlying buffer must not be freed or modified while it backs any bitmaps .
*
* This function is endian - sensitive . If you have a big - endian system ( e . g . , a
* mainframe IBM s390x ) , the data format is going to be big - endian and not
* compatible with little - endian systems .
*/
const roaring_bitmap_t *roaring_bitmap_frozen_view(const char *buf,
size_t length);
/**
* Iterate over the bitmap elements . The function iterator is called once for
* all the values with ptr ( can be NULL ) as the second parameter of each call .
*
* ` roaring_iterator ` is simply a pointer to a function that returns bool
* ( true means that the iteration should continue while false means that it
* should stop ) , and takes ( uint32_t , void * ) as inputs .
*
* Returns true if the roaring_iterator returned true throughout ( so that all
* data points were necessarily visited ) .
*
* Iteration is ordered : from the smallest to the largest elements .
*/
static bool roaring_iterate(const roaring_bitmap_t *r, roaring_iterator iterator,
void *ptr);
static bool roaring_iterate64(const roaring_bitmap_t *r, roaring_iterator64 iterator,
uint64_t high_bits, void *ptr);
/**
* Return true if the two bitmaps contain the same elements .
*/
static bool roaring_bitmap_equals(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Return true if all the elements of r1 are also in r2 .
*/
static bool roaring_bitmap_is_subset(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Return true if all the elements of r1 are also in r2 , and r2 is strictly
* greater than r1 .
*/
static bool roaring_bitmap_is_strict_subset(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* ( For expert users who seek high performance . )
*
* Computes the union between two bitmaps and returns new bitmap . The caller is
* responsible for memory management .
*
* The lazy version defers some computations such as the maintenance of the
* cardinality counts . Thus you must call ` roaring_bitmap_repair_after_lazy ( ) `
* after executing " lazy " computations .
*
* It is safe to repeatedly call roaring_bitmap_lazy_or_inplace on the result .
*
* ` bitsetconversion ` is a flag which determines whether container - container
* operations force a bitset conversion .
*
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_lazy_or(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2,
const bool bitsetconversion);
/**
* ( For expert users who seek high performance . )
*
* Inplace version of roaring_bitmap_lazy_or , modifies r1 .
*
* ` bitsetconversion ` is a flag which determines whether container - container
* operations force a bitset conversion .
*/
static void roaring_bitmap_lazy_or_inplace(roaring_bitmap_t *r1,
const roaring_bitmap_t *r2,
const bool bitsetconversion);
/**
* ( For expert users who seek high performance . )
*
* Execute maintenance on a bitmap created from ` roaring_bitmap_lazy_or ( ) `
* or modified with ` roaring_bitmap_lazy_or_inplace ( ) ` .
*/
static void roaring_bitmap_repair_after_lazy(roaring_bitmap_t *r1);
/**
* Computes the symmetric difference between two bitmaps and returns new bitmap .
* The caller is responsible for memory management .
*
* The lazy version defers some computations such as the maintenance of the
* cardinality counts . Thus you must call ` roaring_bitmap_repair_after_lazy ( ) `
* after executing " lazy " computations .
*
* It is safe to repeatedly call ` roaring_bitmap_lazy_xor_inplace ( ) ` on
* the result .
*
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_lazy_xor(const roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* ( For expert users who seek high performance . )
*
* Inplace version of roaring_bitmap_lazy_xor , modifies r1 . r1 ! = r2
*/
static void roaring_bitmap_lazy_xor_inplace(roaring_bitmap_t *r1,
const roaring_bitmap_t *r2);
/**
* Compute the negation of the bitmap in the interval [ range_start , range_end ) .
* The number of negated values is range_end - range_start .
* Areas outside the range are passed through unchanged .
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_flip(const roaring_bitmap_t *r1,
uint64_t range_start, uint64_t range_end);
/**
* Compute the negation of the bitmap in the interval [ range_start , range_end ] .
* The number of negated values is range_end - range_start + 1 .
* Areas outside the range are passed through unchanged .
* The returned pointer may be NULL in case of errors .
*/
static roaring_bitmap_t *roaring_bitmap_flip_closed(const roaring_bitmap_t *x1,
uint32_t range_start,
uint32_t range_end);
/**
* compute ( in place ) the negation of the roaring bitmap within a specified
* interval : [ range_start , range_end ) . The number of negated values is
* range_end - range_start .
* Areas outside the range are passed through unchanged .
*/
static void roaring_bitmap_flip_inplace(roaring_bitmap_t *r1, uint64_t range_start,
uint64_t range_end);
/**
* compute ( in place ) the negation of the roaring bitmap within a specified
* interval : [ range_start , range_end ] . The number of negated values is
* range_end - range_start + 1 .
* Areas outside the range are passed through unchanged .
*/
static void roaring_bitmap_flip_inplace_closed(roaring_bitmap_t *r1,
uint32_t range_start,
uint32_t range_end);
/**
* Selects the element at index ' rank ' where the smallest element is at index 0 .
* If the size of the roaring bitmap is strictly greater than rank , then this
* function returns true and sets element to the element of given rank .
* Otherwise , it returns false .
*/
static bool roaring_bitmap_select(const roaring_bitmap_t *r, uint32_t rank,
uint32_t *element);
/**
* roaring_bitmap_rank returns the number of integers that are smaller or equal
* to x . Thus if x is the first element , this function will return 1 . If
* x is smaller than the smallest element , this function will return 0 .
*
* The indexing convention differs between roaring_bitmap_select and
* roaring_bitmap_rank : roaring_bitmap_select refers to the smallest value
* as having index 0 , whereas roaring_bitmap_rank returns 1 when ranking
* the smallest value .
*/
static uint64_t roaring_bitmap_rank(const roaring_bitmap_t *r, uint32_t x);
/**
* roaring_bitmap_rank_many is an ` Bulk ` version of ` roaring_bitmap_rank `
* it puts rank value of each element in ` [ begin . . end ) ` to ` ans [ ] `
*
* the values in ` [ begin . . end ) ` must be sorted in Ascending order ;
* Caller is responsible to ensure that there is enough memory allocated , e . g .
*
* ans = malloc ( ( end - begin ) * sizeof ( uint64_t ) ) ;
*/
static void roaring_bitmap_rank_many(const roaring_bitmap_t *r, const uint32_t *begin,
const uint32_t *end, uint64_t *ans);
/**
* Returns the index of x in the given roaring bitmap .
* If the roaring bitmap doesn ' t contain x , this function will return - 1 .
* The difference with rank function is that this function will return - 1 when x
* is not the element of roaring bitmap , but the rank function will return a
* non - negative number .
*/
static int64_t roaring_bitmap_get_index(const roaring_bitmap_t *r, uint32_t x);
/**
* Returns the smallest value in the set , or UINT32_MAX if the set is empty .
*/
static uint32_t roaring_bitmap_minimum(const roaring_bitmap_t *r);
/**
* Returns the greatest value in the set , or 0 if the set is empty .
*/
static uint32_t roaring_bitmap_maximum(const roaring_bitmap_t *r);
/**
* ( For advanced users . )
*
* Collect statistics about the bitmap , see roaring_types . h for
* a description of roaring_statistics_t
*/
static void roaring_bitmap_statistics(const roaring_bitmap_t *r,
roaring_statistics_t *stat);
/**
* Perform internal consistency checks . Returns true if the bitmap is
* consistent . It may be useful to call this after deserializing bitmaps from
* untrusted sources . If roaring_bitmap_internal_validate returns true , then the
* bitmap should be consistent and can be trusted not to cause crashes or memory
* corruption .
*
* Note that some operations intentionally leave bitmaps in an inconsistent
* state temporarily , for example , ` roaring_bitmap_lazy_ * ` functions , until
* ` roaring_bitmap_repair_after_lazy ` is called .
*
* If reason is non - null , it will be set to a string describing the first
* inconsistency found if any .
*/
static bool roaring_bitmap_internal_validate(const roaring_bitmap_t *r,
const char **reason);
/*********************
* What follows is code use to iterate through values in a roaring bitmap
static roaring_bitmap_t * r = . . .
static roaring_uint32_iterator_t i ;
static roaring_iterator_create ( r , & i ) ;
while ( i . has_value ) {
printf ( " value = % d \ n " , i . current_value ) ;
roaring_uint32_iterator_advance ( & i ) ;
}
Obviously , if you modify the underlying bitmap , the iterator
becomes invalid . So don ' t .
*/
/**
* A struct used to keep iterator state . Users should only access
* ` current_value ` and ` has_value ` , the rest of the type should be treated as
* opaque .
*/
typedef struct roaring_uint32_iterator_s {
const roaring_bitmap_t *parent; // Owner
const ROARING_CONTAINER_T *container; // Current container
uint8_t typecode; // Typecode of current container
int32_t container_index; // Current container index
uint32_t highbits; // High 16 bits of the current value
roaring_container_iterator_t container_it;
uint32_t current_value;
bool has_value;
} roaring_uint32_iterator_t;
/**
* Initialize an iterator object that can be used to iterate through the values .
* If there is a value , then this iterator points to the first value and
* ` it - > has_value ` is true . The value is in ` it - > current_value ` .
*/
static void roaring_iterator_init(const roaring_bitmap_t *r,
roaring_uint32_iterator_t *newit);
/** DEPRECATED, use `roaring_iterator_init`. */
CROARING_DEPRECATED static inline void roaring_init_iterator(
const roaring_bitmap_t *r, roaring_uint32_iterator_t *newit) {
roaring_iterator_init(r, newit);
}
/**
* Initialize an iterator object that can be used to iterate through the values .
* If there is a value , then this iterator points to the last value and
* ` it - > has_value ` is true . The value is in ` it - > current_value ` .
*/
static void roaring_iterator_init_last(const roaring_bitmap_t *r,
roaring_uint32_iterator_t *newit);
/** DEPRECATED, use `roaring_iterator_init_last`. */
CROARING_DEPRECATED static inline void roaring_init_iterator_last(
const roaring_bitmap_t *r, roaring_uint32_iterator_t *newit) {
roaring_iterator_init_last(r, newit);
}
/**
* Create an iterator object that can be used to iterate through the values .
* Caller is responsible for calling ` roaring_free_iterator ( ) ` .
*
* The iterator is initialized ( this function calls ` roaring_iterator_init ( ) ` )
* If there is a value , then this iterator points to the first value and
* ` it - > has_value ` is true . The value is in ` it - > current_value ` .
*/
static roaring_uint32_iterator_t *roaring_iterator_create(const roaring_bitmap_t *r);
/** DEPRECATED, use `roaring_iterator_create`. */
CROARING_DEPRECATED static inline roaring_uint32_iterator_t *
roaring_create_iterator(const roaring_bitmap_t *r) {
return roaring_iterator_create(r);
}
/**
* Advance the iterator . If there is a new value , then ` it - > has_value ` is true .
* The new value is in ` it - > current_value ` . Values are traversed in increasing
* orders . For convenience , returns ` it - > has_value ` .
*
* Once ` it - > has_value ` is false , ` roaring_uint32_iterator_advance ` should not
* be called on the iterator again . Calling ` roaring_uint32_iterator_previous `
* is allowed .
*/
static bool roaring_uint32_iterator_advance(roaring_uint32_iterator_t *it);
/** DEPRECATED, use `roaring_uint32_iterator_advance`. */
CROARING_DEPRECATED static inline bool roaring_advance_uint32_iterator(
roaring_uint32_iterator_t *it) {
return roaring_uint32_iterator_advance(it);
}
/**
* Decrement the iterator . If there ' s a new value , then ` it - > has_value ` is true .
* The new value is in ` it - > current_value ` . Values are traversed in decreasing
* order . For convenience , returns ` it - > has_value ` .
*
* Once ` it - > has_value ` is false , ` roaring_uint32_iterator_previous ` should not
* be called on the iterator again . Calling ` roaring_uint32_iterator_advance ` is
* allowed .
*/
static bool roaring_uint32_iterator_previous(roaring_uint32_iterator_t *it);
/** DEPRECATED, use `roaring_uint32_iterator_previous`. */
CROARING_DEPRECATED static inline bool roaring_previous_uint32_iterator(
roaring_uint32_iterator_t *it) {
return roaring_uint32_iterator_previous(it);
}
/**
* Move the iterator to the first value > = ` val ` . If there is a such a value ,
* then ` it - > has_value ` is true . The new value is in ` it - > current_value ` .
* For convenience , returns ` it - > has_value ` .
*/
static bool roaring_uint32_iterator_move_equalorlarger(roaring_uint32_iterator_t *it,
uint32_t val);
/** DEPRECATED, use `roaring_uint32_iterator_move_equalorlarger`. */
CROARING_DEPRECATED static inline bool
roaring_move_uint32_iterator_equalorlarger(roaring_uint32_iterator_t *it,
uint32_t val) {
return roaring_uint32_iterator_move_equalorlarger(it, val);
}
/**
* Creates a copy of an iterator .
* Caller must free it .
*/
static roaring_uint32_iterator_t *roaring_uint32_iterator_copy(
const roaring_uint32_iterator_t *it);
/** DEPRECATED, use `roaring_uint32_iterator_copy`. */
CROARING_DEPRECATED static inline roaring_uint32_iterator_t *
roaring_copy_uint32_iterator(const roaring_uint32_iterator_t *it) {
return roaring_uint32_iterator_copy(it);
}
/**
* Free memory following ` roaring_iterator_create ( ) `
*/
static void roaring_uint32_iterator_free(roaring_uint32_iterator_t *it);
/** DEPRECATED, use `roaring_uint32_iterator_free`. */
CROARING_DEPRECATED static inline void roaring_free_uint32_iterator(
roaring_uint32_iterator_t *it) {
roaring_uint32_iterator_free(it);
}
/*
* Reads next $ { count } values from iterator into user - supplied $ { buf } .
* Returns the number of read elements .
* This number can be smaller than $ { count } , which means that iterator is
* drained .
*
* This function satisfies semantics of iteration and can be used together with
* other iterator functions .
* - first value is copied from $ { it } - > current_value
* - after function returns , iterator is positioned at the next element
*/
static uint32_t roaring_uint32_iterator_read(roaring_uint32_iterator_t *it,
uint32_t *buf, uint32_t count);
/** DEPRECATED, use `roaring_uint32_iterator_read`. */
CROARING_DEPRECATED static inline uint32_t roaring_read_uint32_iterator(
roaring_uint32_iterator_t *it, uint32_t *buf, uint32_t count) {
return roaring_uint32_iterator_read(it, buf, count);
}
#ifdef __cplusplus
}
}
} // extern "C" { namespace roaring { namespace api {
#endif
#endif /* ROARING_H */
#ifdef __cplusplus
/**
* Best practices for C + + headers is to avoid polluting global scope .
* But for C compatibility when just ` roaring . h ` is included building as
* C + + , default to global access for the C public API .
*
* BUT when ` roaring . hh ` is included instead , it sets this flag . That way
* explicit namespacing must be used to get the C functions .
*
* This is outside the include guard so that if you include BOTH headers ,
* the order won ' t matter ; you still get the global definitions .
*/
#if !defined (ROARING_API_NOT_IN_GLOBAL_NAMESPACE)
using namespace ::roaring::api;
#endif
#endif
// roaring64 will include roaring.h, but we would
// prefer to avoid having our users include roaring64.h
// in addition to roaring.h.
/* end file include/roaring/roaring.h */
/* begin file include/roaring/memory.h */
#ifndef INCLUDE_ROARING_MEMORY_H_
#define INCLUDE_ROARING_MEMORY_H_
#include <stddef.h> // for size_t
#ifdef __cplusplus
extern "C" {
#endif
typedef void * (*roaring_malloc_p)(size_t);
typedef void * (*roaring_realloc_p)(void *, size_t);
typedef void * (*roaring_calloc_p)(size_t, size_t);
typedef void (*roaring_free_p)(void *);
typedef void * (*roaring_aligned_malloc_p)(size_t, size_t);
typedef void (*roaring_aligned_free_p)(void *);
typedef struct roaring_memory_s {
roaring_malloc_p malloc;
roaring_realloc_p realloc;
roaring_calloc_p calloc;
roaring_free_p free;
roaring_aligned_malloc_p aligned_malloc;
roaring_aligned_free_p aligned_free;
} roaring_memory_t;
static void roaring_init_memory_hook(roaring_memory_t memory_hook);
static void * roaring_malloc(size_t);
static void * roaring_realloc(void *, size_t);
static void * roaring_calloc(size_t, size_t);
static void roaring_free(void *);
static void * roaring_aligned_malloc(size_t, size_t);
static void roaring_aligned_free(void *);
#ifdef __cplusplus
}
#endif
#endif // INCLUDE_ROARING_MEMORY_H_
/* end file include/roaring/memory.h */
/* begin file include/roaring/roaring64.h */
#ifndef ROARING64_H
#define ROARING64_H
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#ifdef __cplusplus
extern "C" {
namespace roaring {
namespace api {
#endif
typedef struct roaring64_bitmap_s roaring64_bitmap_t;
typedef uint64_t roaring64_leaf_t;
typedef struct roaring64_iterator_s roaring64_iterator_t;
/**
* A bit of context usable with ` roaring64_bitmap_ * _ bulk ( ) ` functions .
*
* Should be initialized with ` { 0 } ` ( or ` memset ( ) ` to all zeros ) .
* Callers should treat it as an opaque type .
*
* A context may only be used with a single bitmap ( unless re - initialized to
* zero ) , and any modification to a bitmap ( other than modifications performed
* with ` _ bulk ( ) ` functions with the context passed ) will invalidate any
* contexts associated with that bitmap .
*/
typedef struct roaring64_bulk_context_s {
uint8_t high_bytes[6 ];
roaring64_leaf_t *leaf;
} roaring64_bulk_context_t;
/**
* Dynamically allocates a new bitmap ( initially empty ) .
* Client is responsible for calling ` roaring64_bitmap_free ( ) ` .
* The returned pointer may be NULL in case of errors .
*/
static roaring64_bitmap_t *roaring64_bitmap_create(void );
static void roaring64_bitmap_free(roaring64_bitmap_t *r);
/**
* Returns a copy of a bitmap .
* The returned pointer may be NULL in case of errors .
*/
static roaring64_bitmap_t *roaring64_bitmap_copy(const roaring64_bitmap_t *r);
/**
* Creates a new bitmap of a pointer to N 64 - bit integers .
*/
static roaring64_bitmap_t *roaring64_bitmap_of_ptr(size_t n_args,
const uint64_t *vals);
#ifdef __cplusplus
/**
* Creates a new bitmap which contains all values passed in as arguments .
*
* To create a bitmap from a variable number of arguments , use the
* ` roaring64_bitmap_of_ptr ` function instead .
*/
// Use an immediately invoked closure, capturing by reference
// (in case __VA_ARGS__ refers to context outside the closure)
// Include a 0 at the beginning of the array to make the array length > 0
// (zero sized arrays are not valid in standard c/c++)
#define roaring64_bitmap_from(...) \
[&]() { \
const uint64_t roaring64_bitmap_from_array[] = {0 , __VA_ARGS__}; \
return roaring64_bitmap_of_ptr( \
(sizeof (roaring64_bitmap_from_array) / \
sizeof (roaring64_bitmap_from_array[0 ])) - \
1 , \
&roaring64_bitmap_from_array[1 ]); \
}()
#else
/**
* Creates a new bitmap which contains all values passed in as arguments .
*
* To create a bitmap from a variable number of arguments , use the
* ` roaring64_bitmap_of_ptr ` function instead .
*/
// While __VA_ARGS__ occurs twice in expansion, one of the times is in a sizeof
// expression, which is an unevaluated context, so it's even safe in the case
// where expressions passed have side effects (roaring64_bitmap_from(my_func(),
// ++i))
// Include a 0 at the beginning of the array to make the array length > 0
// (zero sized arrays are not valid in standard c/c++)
#define roaring64_bitmap_from(...) \
roaring64_bitmap_of_ptr( \
(sizeof ((const uint64_t[]){0 , __VA_ARGS__}) / sizeof (uint64_t)) - 1 , \
&((const uint64_t[]){0 , __VA_ARGS__})[1 ])
#endif
/**
* Create a new bitmap by moving containers from a 32 bit roaring bitmap .
*
* After calling this function , the original bitmap will be empty , and the
* returned bitmap will contain all the values from the original bitmap .
*/
static roaring64_bitmap_t *roaring64_bitmap_move_from_roaring32(roaring_bitmap_t *r);
/**
* Create a new bitmap containing all the values in [ min , max ) that are at a
* distance k * step from min .
* The returned pointer may be NULL in case of errors .
*/
static roaring64_bitmap_t *roaring64_bitmap_from_range(uint64_t min, uint64_t max,
uint64_t step);
/**
* Adds the provided value to the bitmap .
*/
static void roaring64_bitmap_add(roaring64_bitmap_t *r, uint64_t val);
/**
* Adds the provided value to the bitmap .
* Returns true if a new value was added , false if the value already existed .
*/
static bool roaring64_bitmap_add_checked(roaring64_bitmap_t *r, uint64_t val);
/**
* Add an item , using context from a previous insert for faster insertion .
*
* ` context ` will be used to store information between calls to make bulk
* operations faster . ` * context ` should be zero - initialized before the first
* call to this function .
*
* Modifying the bitmap in any way ( other than ` - bulk ` suffixed functions )
* will invalidate the stored context , calling this function with a non - zero
* context after doing any modification invokes undefined behavior .
*
* In order to exploit this optimization , the caller should call this function
* with values with the same high 48 bits of the value consecutively .
*/
static void roaring64_bitmap_add_bulk(roaring64_bitmap_t *r,
roaring64_bulk_context_t *context, uint64_t val);
/**
* Add ` n_args ` values from ` vals ` , faster than repeatedly calling
* ` roaring64_bitmap_add ( ) `
*
* In order to exploit this optimization , the caller should attempt to keep
* values with the same high 48 bits of the value as consecutive elements in
* ` vals ` .
*/
static void roaring64_bitmap_add_many(roaring64_bitmap_t *r, size_t n_args,
const uint64_t *vals);
/**
* Add all values in range [ min , max ) .
*/
static void roaring64_bitmap_add_range(roaring64_bitmap_t *r, uint64_t min,
uint64_t max);
/**
* Add all values in range [ min , max ] .
*/
static void roaring64_bitmap_add_range_closed(roaring64_bitmap_t *r, uint64_t min,
uint64_t max);
/**
* Removes a value from the bitmap if present .
*/
static void roaring64_bitmap_remove(roaring64_bitmap_t *r, uint64_t val);
/**
* Removes a value from the bitmap if present , returns true if the value was
* removed and false if the value was not present .
*/
static bool roaring64_bitmap_remove_checked(roaring64_bitmap_t *r, uint64_t val);
/**
* Remove an item , using context from a previous insert for faster removal .
*
* ` context ` will be used to store information between calls to make bulk
* operations faster . ` * context ` should be zero - initialized before the first
* call to this function .
*
* Modifying the bitmap in any way ( other than ` - bulk ` suffixed functions )
* will invalidate the stored context , calling this function with a non - zero
* context after doing any modification invokes undefined behavior .
*
* In order to exploit this optimization , the caller should call this function
* with values with the same high 48 bits of the value consecutively .
*/
static void roaring64_bitmap_remove_bulk(roaring64_bitmap_t *r,
roaring64_bulk_context_t *context,
uint64_t val);
/**
* Remove ` n_args ` values from ` vals ` , faster than repeatedly calling
* ` roaring64_bitmap_remove ( ) `
*
* In order to exploit this optimization , the caller should attempt to keep
* values with the same high 48 bits of the value as consecutive elements in
* ` vals ` .
*/
static void roaring64_bitmap_remove_many(roaring64_bitmap_t *r, size_t n_args,
const uint64_t *vals);
/**
* Remove all values in range [ min , max ) .
*/
static void roaring64_bitmap_remove_range(roaring64_bitmap_t *r, uint64_t min,
uint64_t max);
/**
* Remove all values in range [ min , max ] .
*/
static void roaring64_bitmap_remove_range_closed(roaring64_bitmap_t *r, uint64_t min,
uint64_t max);
/**
* Empties the bitmap .
*/
static void roaring64_bitmap_clear(roaring64_bitmap_t *r);
/**
* Returns true if the provided value is present .
*/
static bool roaring64_bitmap_contains(const roaring64_bitmap_t *r, uint64_t val);
/**
* Returns true if all values in the range [ min , max ) are present .
*/
static bool roaring64_bitmap_contains_range(const roaring64_bitmap_t *r, uint64_t min,
uint64_t max);
/**
* Check if an item is present using context from a previous insert or search
* for faster search .
*
* ` context ` will be used to store information between calls to make bulk
* operations faster . ` * context ` should be zero - initialized before the first
* call to this function .
*
* Modifying the bitmap in any way ( other than ` - bulk ` suffixed functions )
* will invalidate the stored context , calling this function with a non - zero
* context after doing any modification invokes undefined behavior .
*
* In order to exploit this optimization , the caller should call this function
* with values with the same high 48 bits of the value consecutively .
*/
static bool roaring64_bitmap_contains_bulk(const roaring64_bitmap_t *r,
roaring64_bulk_context_t *context,
uint64_t val);
/**
* Selects the element at index ' rank ' where the smallest element is at index 0 .
* If the size of the bitmap is strictly greater than rank , then this function
* returns true and sets element to the element of given rank . Otherwise , it
* returns false .
*/
static bool roaring64_bitmap_select(const roaring64_bitmap_t *r, uint64_t rank,
uint64_t *element);
/**
* Returns the number of integers that are smaller or equal to x . Thus if x is
* the first element , this function will return 1 . If x is smaller than the
* smallest element , this function will return 0 .
*
* The indexing convention differs between roaring64_bitmap_select and
* roaring64_bitmap_rank : roaring_bitmap64_select refers to the smallest value
* as having index 0 , whereas roaring64_bitmap_rank returns 1 when ranking
* the smallest value .
*/
static uint64_t roaring64_bitmap_rank(const roaring64_bitmap_t *r, uint64_t val);
/**
* Returns true if the given value is in the bitmap , and sets ` out_index ` to the
* ( 0 - based ) index of the value in the bitmap . Returns false if the value is not
* in the bitmap .
*/
static bool roaring64_bitmap_get_index(const roaring64_bitmap_t *r, uint64_t val,
uint64_t *out_index);
/**
* Returns the number of values in the bitmap .
*/
static uint64_t roaring64_bitmap_get_cardinality(const roaring64_bitmap_t *r);
/**
* Returns the number of elements in the range [ min , max ) .
*/
static uint64_t roaring64_bitmap_range_cardinality(const roaring64_bitmap_t *r,
uint64_t min, uint64_t max);
/**
* Returns the number of elements in the range [ min , max ]
*/
static uint64_t roaring64_bitmap_range_closed_cardinality(const roaring64_bitmap_t *r,
uint64_t min, uint64_t max);
/**
* Returns true if the bitmap is empty ( cardinality is zero ) .
*/
static bool roaring64_bitmap_is_empty(const roaring64_bitmap_t *r);
/**
* Returns the smallest value in the set , or UINT64_MAX if the set is empty .
*/
static uint64_t roaring64_bitmap_minimum(const roaring64_bitmap_t *r);
/**
* Returns the largest value in the set , or 0 if empty .
*/
static uint64_t roaring64_bitmap_maximum(const roaring64_bitmap_t *r);
/**
* Returns true if the result has at least one run container .
*/
static bool roaring64_bitmap_run_optimize(roaring64_bitmap_t *r);
/**
* Shrinks internal arrays to eliminate any unused capacity . Returns the number
* of bytes freed .
*/
static size_t roaring64_bitmap_shrink_to_fit(roaring64_bitmap_t *r);
/**
* ( For advanced users . )
* Collect statistics about the bitmap
*/
static void roaring64_bitmap_statistics(const roaring64_bitmap_t *r,
roaring64_statistics_t *stat);
/**
* Perform internal consistency checks .
*
* Returns true if the bitmap is consistent . It may be useful to call this
* after deserializing bitmaps from untrusted sources . If
* roaring64_bitmap_internal_validate returns true , then the bitmap is
* consistent and can be trusted not to cause crashes or memory corruption .
*
* If reason is non - null , it will be set to a string describing the first
* inconsistency found if any .
*/
static bool roaring64_bitmap_internal_validate(const roaring64_bitmap_t *r,
const char **reason);
/**
* Return true if the two bitmaps contain the same elements .
*/
static bool roaring64_bitmap_equals(const roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* Return true if all the elements of r1 are also in r2 .
*/
static bool roaring64_bitmap_is_subset(const roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* Return true if all the elements of r1 are also in r2 , and r2 is strictly
* greater than r1 .
*/
static bool roaring64_bitmap_is_strict_subset(const roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* Computes the intersection between two bitmaps and returns new bitmap . The
* caller is responsible for free - ing the result .
*
* Performance hint : if you are computing the intersection between several
* bitmaps , two - by - two , it is best to start with the smallest bitmaps . You may
* also rely on roaring64_bitmap_and_inplace to avoid creating many temporary
* bitmaps .
*
* The returned pointer may be NULL in case of errors .
*/
static roaring64_bitmap_t *roaring64_bitmap_and(const roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* Computes the size of the intersection between two bitmaps .
*/
static uint64_t roaring64_bitmap_and_cardinality(const roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* In - place version of ` roaring64_bitmap_and ( ) ` , modifies ` r1 ` . ` r1 ` and ` r2 `
* are allowed to be equal .
*
* Performance hint : if you are computing the intersection between several
* bitmaps , two - by - two , it is best to start with the smallest bitmaps .
*/
static void roaring64_bitmap_and_inplace(roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* Check whether two bitmaps intersect .
*/
static bool roaring64_bitmap_intersect(const roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* Check whether a bitmap intersects the range [ min , max ) .
*/
static bool roaring64_bitmap_intersect_with_range(const roaring64_bitmap_t *r,
uint64_t min, uint64_t max);
/**
* Computes the Jaccard index between two bitmaps . ( Also known as the Tanimoto
* distance , or the Jaccard similarity coefficient )
*
* The Jaccard index is undefined if both bitmaps are empty .
*/
static double roaring64_bitmap_jaccard_index(const roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* Computes the union between two bitmaps and returns new bitmap . The caller is
* responsible for free - ing the result .
* The returned pointer may be NULL in case of errors .
*/
static roaring64_bitmap_t *roaring64_bitmap_or(const roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* Computes the size of the union between two bitmaps .
*/
static uint64_t roaring64_bitmap_or_cardinality(const roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* In - place version of ` roaring64_bitmap_or ( ) , modifies ` r1 ` .
*/
static void roaring64_bitmap_or_inplace(roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* Computes the symmetric difference ( xor ) between two bitmaps and returns a new
* bitmap . The caller is responsible for free - ing the result .
* The returned pointer may be NULL in case of errors .
*/
static roaring64_bitmap_t *roaring64_bitmap_xor(const roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* Computes the size of the symmetric difference ( xor ) between two bitmaps .
*/
static uint64_t roaring64_bitmap_xor_cardinality(const roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* In - place version of ` roaring64_bitmap_xor ( ) ` , modifies ` r1 ` . ` r1 ` and ` r2 `
* are not allowed to be equal ( that would result in an empty bitmap ) .
*/
static void roaring64_bitmap_xor_inplace(roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* Computes the difference ( andnot ) between two bitmaps and returns a new
* bitmap . The caller is responsible for free - ing the result .
* The returned pointer may be NULL in case of errors .
*/
static roaring64_bitmap_t *roaring64_bitmap_andnot(const roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* Computes the size of the difference ( andnot ) between two bitmaps .
*/
static uint64_t roaring64_bitmap_andnot_cardinality(const roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* In - place version of ` roaring64_bitmap_andnot ( ) ` , modifies ` r1 ` . ` r1 ` and ` r2 `
* are not allowed to be equal ( that would result in an empty bitmap ) .
*/
static void roaring64_bitmap_andnot_inplace(roaring64_bitmap_t *r1,
const roaring64_bitmap_t *r2);
/**
* Compute the negation of the bitmap in the interval [ min , max ) .
* The number of negated values is ` max - min ` . Areas outside the range are
* passed through unchanged .
* The returned pointer may be NULL in case of errors .
*/
static roaring64_bitmap_t *roaring64_bitmap_flip(const roaring64_bitmap_t *r,
uint64_t min, uint64_t max);
/**
* Compute the negation of the bitmap in the interval [ min , max ] .
* The number of negated values is ` max - min + 1 ` . Areas outside the range are
* passed through unchanged .
* The returned pointer may be NULL in case of errors .
*/
static roaring64_bitmap_t *roaring64_bitmap_flip_closed(const roaring64_bitmap_t *r,
uint64_t min, uint64_t max);
/**
* In - place version of ` roaring64_bitmap_flip ` . Compute the negation of the
* bitmap in the interval [ min , max ) . The number of negated values is ` max -
* min ` . Areas outside the range are passed through unchanged .
*/
static void roaring64_bitmap_flip_inplace(roaring64_bitmap_t *r, uint64_t min,
uint64_t max);
/**
* In - place version of ` roaring64_bitmap_flip_closed ` . Compute the negation of
* the bitmap in the interval [ min , max ] . The number of negated values is ` max -
* min + 1 ` . Areas outside the range are passed through unchanged .
*/
static void roaring64_bitmap_flip_closed_inplace(roaring64_bitmap_t *r, uint64_t min,
uint64_t max);
/**
* How many bytes are required to serialize this bitmap .
*
* This is meant to be compatible with other languages :
* https : //github.com/RoaringBitmap/RoaringFormatSpec#extension-for-64-bit-implementations
*/
static size_t roaring64_bitmap_portable_size_in_bytes(const roaring64_bitmap_t *r);
/**
* Write a bitmap to a buffer . The output buffer should refer to at least
* ` roaring64_bitmap_portable_size_in_bytes ( r ) ` bytes of allocated memory .
*
* Returns how many bytes were written , which should match
* ` roaring64_bitmap_portable_size_in_bytes ( r ) ` .
*
* This is meant to be compatible with other languages :
* https : //github.com/RoaringBitmap/RoaringFormatSpec#extension-for-64-bit-implementations
*
* This function is endian - sensitive . If you have a big - endian system ( e . g . , a
* mainframe IBM s390x ) , the data format is going to be big - endian and not
* compatible with little - endian systems .
*
* When serializing data to a file , we recommend that you also use
* checksums so that , at deserialization , you can be confident
* that you are recovering the correct data .
*/
static size_t roaring64_bitmap_portable_serialize(const roaring64_bitmap_t *r,
char *buf);
/**
* Check how many bytes would be read ( up to maxbytes ) at this pointer if there
* is a valid bitmap , returns zero if there is no valid bitmap .
*
* This is meant to be compatible with other languages
* https : //github.com/RoaringBitmap/RoaringFormatSpec#extension-for-64-bit-implementations
*/
static size_t roaring64_bitmap_portable_deserialize_size(const char *buf,
size_t maxbytes);
/**
* Read a bitmap from a serialized buffer ( reading up to maxbytes ) .
* In case of failure , NULL is returned .
*
* This is meant to be compatible with other languages
* https : //github.com/RoaringBitmap/RoaringFormatSpec#extension-for-64-bit-implementations
*
* The function itself is safe in the sense that it will not cause buffer
* overflows : it will not read beyond the scope of the provided buffer
* ( buf , maxbytes ) .
*
* However , for correct operations , it is assumed that the bitmap
* read was once serialized from a valid bitmap ( i . e . , it follows the format
* specification ) . If you provided an incorrect input ( garbage ) , then the bitmap
* read may not be in a valid state and following operations may not lead to
* sensible results . In particular , the serialized array containers need to be
* in sorted order , and the run containers should be in sorted non - overlapping
* order . This is is guaranteed to happen when serializing an existing bitmap ,
* but not for random inputs .
*
* If the source is untrusted , you should call
* roaring64_bitmap_internal_validate to check the validity of the
* bitmap prior to using it . Only after calling
* roaring64_bitmap_internal_validate is the bitmap considered safe for use .
*
* We also recommend that you use checksums to check that serialized data
* corresponds to the serialized bitmap . The CRoaring library does not provide
* checksumming .
*
* This function is endian - sensitive . If you have a big - endian system ( e . g . , a
* mainframe IBM s390x ) , the data format is going to be big - endian and not
* compatible with little - endian systems .
*/
static roaring64_bitmap_t *roaring64_bitmap_portable_deserialize_safe(const char *buf,
size_t maxbytes);
/**
* Returns the number of bytes required to serialize this bitmap in a " frozen "
* format . This is not compatible with any other serialization formats .
*
* ` roaring64_bitmap_shrink_to_fit ( ) ` must be called before this method .
*/
static size_t roaring64_bitmap_frozen_size_in_bytes(const roaring64_bitmap_t *r);
/**
* Serializes the bitmap in a " frozen " format . The given buffer must be at least
* ` roaring64_bitmap_frozen_size_in_bytes ( ) ` in size . Returns the number of
* bytes used for serialization .
*
* ` roaring64_bitmap_shrink_to_fit ( ) ` must be called before this method .
*
* The frozen format is optimized for speed of ( de ) serialization , as well as
* allowing the user to create a bitmap based on a memory mapped file , which is
* possible because the format mimics the memory layout of the bitmap .
*
* Because the format mimics the memory layout of the bitmap , the format is not
* fixed across releases of Roaring Bitmaps , and may change in future releases .
*
* This function is endian - sensitive . If you have a big - endian system ( e . g . , a
* mainframe IBM s390x ) , the data format is going to be big - endian and not
* compatible with little - endian systems .
*/
static size_t roaring64_bitmap_frozen_serialize(const roaring64_bitmap_t *r,
char *buf);
/**
* Creates a readonly bitmap that is a view of the given buffer . The buffer
* must be created with ` roaring64_bitmap_frozen_serialize ( ) ` , and must be
* aligned by 64 bytes .
*
* Returns NULL if deserialization fails .
*
* The returned bitmap must only be used in a readonly manner . The bitmap must
* be freed using ` roaring64_bitmap_free ( ) ` as normal . The backing buffer must
* only be freed after the bitmap .
*
* This function is endian - sensitive . If you have a big - endian system ( e . g . , a
* mainframe IBM s390x ) , the data format is going to be big - endian and not
* compatible with little - endian systems .
*/
static roaring64_bitmap_t *roaring64_bitmap_frozen_view(const char *buf,
size_t maxbytes);
/**
* Iterate over the bitmap elements . The function ` iterator ` is called once for
* all the values with ` ptr ` ( can be NULL ) as the second parameter of each call .
*
* ` roaring_iterator64 ` is simply a pointer to a function that returns a bool
* and takes ` ( uint64_t , void * ) ` as inputs . True means that the iteration should
* continue , while false means that it should stop .
*
* Returns true if the ` roaring64_iterator ` returned true throughout ( so that
* all data points were necessarily visited ) .
*
* Iteration is ordered from the smallest to the largest elements .
*/
static bool roaring64_bitmap_iterate(const roaring64_bitmap_t *r,
roaring_iterator64 iterator, void *ptr);
/**
* Convert the bitmap to a sorted array ` out ` .
*
* Caller is responsible to ensure that there is enough memory allocated , e . g .
* ` ` `
* out = malloc ( roaring64_bitmap_get_cardinality ( bitmap ) * sizeof ( uint64_t ) ) ;
* ` ` `
*/
static void roaring64_bitmap_to_uint64_array(const roaring64_bitmap_t *r,
uint64_t *out);
/**
* Create an iterator object that can be used to iterate through the values .
* Caller is responsible for calling ` roaring64_iterator_free ( ) ` .
*
* The iterator is initialized . If there is a value , then this iterator points
* to the first value and ` roaring64_iterator_has_value ( ) ` returns true . The
* value can be retrieved with ` roaring64_iterator_value ( ) ` .
*/
static roaring64_iterator_t *roaring64_iterator_create(const roaring64_bitmap_t *r);
/**
* Create an iterator object that can be used to iterate through the values .
* Caller is responsible for calling ` roaring64_iterator_free ( ) ` .
*
* The iterator is initialized . If there is a value , then this iterator points
* to the last value and ` roaring64_iterator_has_value ( ) ` returns true . The
* value can be retrieved with ` roaring64_iterator_value ( ) ` .
*/
static roaring64_iterator_t *roaring64_iterator_create_last(
const roaring64_bitmap_t *r);
/**
* Re - initializes an existing iterator . Functionally the same as
* ` roaring64_iterator_create ` without a allocation .
*/
static void roaring64_iterator_reinit(const roaring64_bitmap_t *r,
roaring64_iterator_t *it);
/**
* Re - initializes an existing iterator . Functionally the same as
* ` roaring64_iterator_create_last ` without a allocation .
*/
static void roaring64_iterator_reinit_last(const roaring64_bitmap_t *r,
roaring64_iterator_t *it);
/**
* Creates a copy of the iterator . Caller is responsible for calling
* ` roaring64_iterator_free ( ) ` on the resulting iterator .
*/
static roaring64_iterator_t *roaring64_iterator_copy(const roaring64_iterator_t *it);
/**
* Free the iterator .
*/
static void roaring64_iterator_free(roaring64_iterator_t *it);
/**
* Returns true if the iterator currently points to a value . If so , calling
* ` roaring64_iterator_value ( ) ` returns the value .
*/
static bool roaring64_iterator_has_value(const roaring64_iterator_t *it);
/**
* Returns the value the iterator currently points to . Should only be called if
* ` roaring64_iterator_has_value ( ) ` returns true .
*/
static uint64_t roaring64_iterator_value(const roaring64_iterator_t *it);
/**
* Advance the iterator . If there is a new value , then
* ` roaring64_iterator_has_value ( ) ` returns true . Values are traversed in
* increasing order . For convenience , returns the result of
* ` roaring64_iterator_has_value ( ) ` .
*
* Once this returns false , ` roaring64_iterator_advance ` should not be called on
* the iterator again . Calling ` roaring64_iterator_previous ` is allowed .
*/
static bool roaring64_iterator_advance(roaring64_iterator_t *it);
/**
* Decrement the iterator . If there is a new value , then
* ` roaring64_iterator_has_value ( ) ` returns true . Values are traversed in
* decreasing order . For convenience , returns the result of
* ` roaring64_iterator_has_value ( ) ` .
*
* Once this returns false , ` roaring64_iterator_previous ` should not be called
* on the iterator again . Calling ` roaring64_iterator_advance ` is allowed .
*/
static bool roaring64_iterator_previous(roaring64_iterator_t *it);
/**
* Move the iterator to the first value greater than or equal to ` val ` , if it
* exists at or after the current position of the iterator . If there is a new
* value , then ` roaring64_iterator_has_value ( ) ` returns true . Values are
* traversed in increasing order . For convenience , returns the result of
* ` roaring64_iterator_has_value ( ) ` .
*/
static bool roaring64_iterator_move_equalorlarger(roaring64_iterator_t *it,
uint64_t val);
/**
* Reads up to ` count ` values from the iterator into the given ` buf ` . Returns
* the number of elements read . The number of elements read can be smaller than
* ` count ` , which means that there are no more elements in the bitmap .
*
* This function can be used together with other iterator functions .
*/
static uint64_t roaring64_iterator_read(roaring64_iterator_t *it, uint64_t *buf,
uint64_t count);
#ifdef __cplusplus
} // extern "C"
} // namespace roaring
} // namespace api
#endif
#endif /* ROARING64_H */
/* end file include/roaring/roaring64.h */
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