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sqliteInt.h
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5207 lines (4901 loc) · 221 KB
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/*
** 2001 September 15
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**
*************************************************************************
** Internal interface definitions for SQLite.
**
*/
#ifndef SQLITEINT_H
#define SQLITEINT_H
/* Special Comments:
**
** Some comments have special meaning to the tools that measure test
** coverage:
**
** NO_TEST - The branches on this line are not
** measured by branch coverage. This is
** used on lines of code that actually
** implement parts of coverage testing.
**
** OPTIMIZATION-IF-TRUE - This branch is allowed to alway be false
** and the correct answer is still obtained,
** though perhaps more slowly.
**
** OPTIMIZATION-IF-FALSE - This branch is allowed to alway be true
** and the correct answer is still obtained,
** though perhaps more slowly.
**
** PREVENTS-HARMLESS-OVERREAD - This branch prevents a buffer overread
** that would be harmless and undetectable
** if it did occur.
**
** In all cases, the special comment must be enclosed in the usual
** slash-asterisk...asterisk-slash comment marks, with no spaces between the
** asterisks and the comment text.
*/
/*
** Make sure the Tcl calling convention macro is defined. This macro is
** only used by test code and Tcl integration code.
*/
#ifndef SQLITE_TCLAPI
# define SQLITE_TCLAPI
#endif
/*
** Include the header file used to customize the compiler options for MSVC.
** This should be done first so that it can successfully prevent spurious
** compiler warnings due to subsequent content in this file and other files
** that are included by this file.
*/
#include "msvc.h"
/*
** Special setup for VxWorks
*/
#include "vxworks.h"
/*
** These #defines should enable >2GB file support on POSIX if the
** underlying operating system supports it. If the OS lacks
** large file support, or if the OS is windows, these should be no-ops.
**
** Ticket #2739: The _LARGEFILE_SOURCE macro must appear before any
** system #includes. Hence, this block of code must be the very first
** code in all source files.
**
** Large file support can be disabled using the -DSQLITE_DISABLE_LFS switch
** on the compiler command line. This is necessary if you are compiling
** on a recent machine (ex: Red Hat 7.2) but you want your code to work
** on an older machine (ex: Red Hat 6.0). If you compile on Red Hat 7.2
** without this option, LFS is enable. But LFS does not exist in the kernel
** in Red Hat 6.0, so the code won't work. Hence, for maximum binary
** portability you should omit LFS.
**
** The previous paragraph was written in 2005. (This paragraph is written
** on 2008-11-28.) These days, all Linux kernels support large files, so
** you should probably leave LFS enabled. But some embedded platforms might
** lack LFS in which case the SQLITE_DISABLE_LFS macro might still be useful.
**
** Similar is true for Mac OS X. LFS is only supported on Mac OS X 9 and later.
*/
#ifndef SQLITE_DISABLE_LFS
# define _LARGE_FILE 1
# ifndef _FILE_OFFSET_BITS
# define _FILE_OFFSET_BITS 64
# endif
# define _LARGEFILE_SOURCE 1
#endif
/* The GCC_VERSION and MSVC_VERSION macros are used to
** conditionally include optimizations for each of these compilers. A
** value of 0 means that compiler is not being used. The
** SQLITE_DISABLE_INTRINSIC macro means do not use any compiler-specific
** optimizations, and hence set all compiler macros to 0
**
** There was once also a CLANG_VERSION macro. However, we learn that the
** version numbers in clang are for "marketing" only and are inconsistent
** and unreliable. Fortunately, all versions of clang also recognize the
** gcc version numbers and have reasonable settings for gcc version numbers,
** so the GCC_VERSION macro will be set to a correct non-zero value even
** when compiling with clang.
*/
#if defined(__GNUC__) && !defined(SQLITE_DISABLE_INTRINSIC)
# define GCC_VERSION (__GNUC__*1000000+__GNUC_MINOR__*1000+__GNUC_PATCHLEVEL__)
#else
# define GCC_VERSION 0
#endif
#if defined(_MSC_VER) && !defined(SQLITE_DISABLE_INTRINSIC)
# define MSVC_VERSION _MSC_VER
#else
# define MSVC_VERSION 0
#endif
/*
** Some C99 functions in "math.h" are only present for MSVC when its version
** is associated with Visual Studio 2013 or higher.
*/
#ifndef SQLITE_HAVE_C99_MATH_FUNCS
# if MSVC_VERSION==0 || MSVC_VERSION>=1800
# define SQLITE_HAVE_C99_MATH_FUNCS (1)
# else
# define SQLITE_HAVE_C99_MATH_FUNCS (0)
# endif
#endif
/* Needed for various definitions... */
#if defined(__GNUC__) && !defined(_GNU_SOURCE)
# define _GNU_SOURCE
#endif
#if defined(__OpenBSD__) && !defined(_BSD_SOURCE)
# define _BSD_SOURCE
#endif
/*
** Macro to disable warnings about missing "break" at the end of a "case".
*/
#if GCC_VERSION>=7000000
# define deliberate_fall_through __attribute__((fallthrough));
#else
# define deliberate_fall_through
#endif
/*
** For MinGW, check to see if we can include the header file containing its
** version information, among other things. Normally, this internal MinGW
** header file would [only] be included automatically by other MinGW header
** files; however, the contained version information is now required by this
** header file to work around binary compatibility issues (see below) and
** this is the only known way to reliably obtain it. This entire #if block
** would be completely unnecessary if there was any other way of detecting
** MinGW via their preprocessor (e.g. if they customized their GCC to define
** some MinGW-specific macros). When compiling for MinGW, either the
** _HAVE_MINGW_H or _HAVE__MINGW_H (note the extra underscore) macro must be
** defined; otherwise, detection of conditions specific to MinGW will be
** disabled.
*/
#if defined(_HAVE_MINGW_H)
# include "mingw.h"
#elif defined(_HAVE__MINGW_H)
# include "_mingw.h"
#endif
/*
** For MinGW version 4.x (and higher), check to see if the _USE_32BIT_TIME_T
** define is required to maintain binary compatibility with the MSVC runtime
** library in use (e.g. for Windows XP).
*/
#if !defined(_USE_32BIT_TIME_T) && !defined(_USE_64BIT_TIME_T) && \
defined(_WIN32) && !defined(_WIN64) && \
defined(__MINGW_MAJOR_VERSION) && __MINGW_MAJOR_VERSION >= 4 && \
defined(__MSVCRT__)
# define _USE_32BIT_TIME_T
#endif
/* The public SQLite interface. The _FILE_OFFSET_BITS macro must appear
** first in QNX. Also, the _USE_32BIT_TIME_T macro must appear first for
** MinGW.
*/
#include "sqlite3.h"
/*
** Include the configuration header output by 'configure' if we're using the
** autoconf-based build
*/
#if defined(_HAVE_SQLITE_CONFIG_H) && !defined(SQLITECONFIG_H)
#include "config.h"
#define SQLITECONFIG_H 1
#endif
#include "sqliteLimit.h"
/* Disable nuisance warnings on Borland compilers */
#if defined(__BORLANDC__)
#pragma warn -rch /* unreachable code */
#pragma warn -ccc /* Condition is always true or false */
#pragma warn -aus /* Assigned value is never used */
#pragma warn -csu /* Comparing signed and unsigned */
#pragma warn -spa /* Suspicious pointer arithmetic */
#endif
/*
** WAL mode depends on atomic aligned 32-bit loads and stores in a few
** places. The following macros try to make this explicit.
*/
#ifndef __has_extension
# define __has_extension(x) 0 /* compatibility with non-clang compilers */
#endif
#if GCC_VERSION>=4007000 || \
(__has_extension(c_atomic) && __has_extension(c_atomic_store_n))
# define AtomicLoad(PTR) __atomic_load_n((PTR),__ATOMIC_RELAXED)
# define AtomicStore(PTR,VAL) __atomic_store_n((PTR),(VAL),__ATOMIC_RELAXED)
#else
# define AtomicLoad(PTR) (*(PTR))
# define AtomicStore(PTR,VAL) (*(PTR) = (VAL))
#endif
/*
** Include standard header files as necessary
*/
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef HAVE_INTTYPES_H
#include <inttypes.h>
#endif
/*
** The following macros are used to cast pointers to integers and
** integers to pointers. The way you do this varies from one compiler
** to the next, so we have developed the following set of #if statements
** to generate appropriate macros for a wide range of compilers.
**
** The correct "ANSI" way to do this is to use the intptr_t type.
** Unfortunately, that typedef is not available on all compilers, or
** if it is available, it requires an #include of specific headers
** that vary from one machine to the next.
**
** Ticket #3860: The llvm-gcc-4.2 compiler from Apple chokes on
** the ((void*)&((char*)0)[X]) construct. But MSVC chokes on ((void*)(X)).
** So we have to define the macros in different ways depending on the
** compiler.
*/
#if defined(HAVE_STDINT_H) /* Use this case if we have ANSI headers */
# define SQLITE_INT_TO_PTR(X) ((void*)(intptr_t)(X))
# define SQLITE_PTR_TO_INT(X) ((int)(intptr_t)(X))
#elif defined(__PTRDIFF_TYPE__) /* This case should work for GCC */
# define SQLITE_INT_TO_PTR(X) ((void*)(__PTRDIFF_TYPE__)(X))
# define SQLITE_PTR_TO_INT(X) ((int)(__PTRDIFF_TYPE__)(X))
#elif !defined(__GNUC__) /* Works for compilers other than LLVM */
# define SQLITE_INT_TO_PTR(X) ((void*)&((char*)0)[X])
# define SQLITE_PTR_TO_INT(X) ((int)(((char*)X)-(char*)0))
#else /* Generates a warning - but it always works */
# define SQLITE_INT_TO_PTR(X) ((void*)(X))
# define SQLITE_PTR_TO_INT(X) ((int)(X))
#endif
/*
** A macro to hint to the compiler that a function should not be
** inlined.
*/
#if defined(__GNUC__)
# define SQLITE_NOINLINE __attribute__((noinline))
#elif defined(_MSC_VER) && _MSC_VER>=1310
# define SQLITE_NOINLINE __declspec(noinline)
#else
# define SQLITE_NOINLINE
#endif
/*
** Make sure that the compiler intrinsics we desire are enabled when
** compiling with an appropriate version of MSVC unless prevented by
** the SQLITE_DISABLE_INTRINSIC define.
*/
#if !defined(SQLITE_DISABLE_INTRINSIC)
# if defined(_MSC_VER) && _MSC_VER>=1400
# if !defined(_WIN32_WCE)
# include <intrin.h>
# pragma intrinsic(_byteswap_ushort)
# pragma intrinsic(_byteswap_ulong)
# pragma intrinsic(_byteswap_uint64)
# pragma intrinsic(_ReadWriteBarrier)
# else
# include <cmnintrin.h>
# endif
# endif
#endif
/*
** The SQLITE_THREADSAFE macro must be defined as 0, 1, or 2.
** 0 means mutexes are permanently disable and the library is never
** threadsafe. 1 means the library is serialized which is the highest
** level of threadsafety. 2 means the library is multithreaded - multiple
** threads can use SQLite as long as no two threads try to use the same
** database connection at the same time.
**
** Older versions of SQLite used an optional THREADSAFE macro.
** We support that for legacy.
**
** To ensure that the correct value of "THREADSAFE" is reported when querying
** for compile-time options at runtime (e.g. "PRAGMA compile_options"), this
** logic is partially replicated in ctime.c. If it is updated here, it should
** also be updated there.
*/
#if !defined(SQLITE_THREADSAFE)
# if defined(THREADSAFE)
# define SQLITE_THREADSAFE THREADSAFE
# else
# define SQLITE_THREADSAFE 1 /* IMP: R-07272-22309 */
# endif
#endif
/*
** Powersafe overwrite is on by default. But can be turned off using
** the -DSQLITE_POWERSAFE_OVERWRITE=0 command-line option.
*/
#ifndef SQLITE_POWERSAFE_OVERWRITE
# define SQLITE_POWERSAFE_OVERWRITE 1
#endif
/*
** EVIDENCE-OF: R-25715-37072 Memory allocation statistics are enabled by
** default unless SQLite is compiled with SQLITE_DEFAULT_MEMSTATUS=0 in
** which case memory allocation statistics are disabled by default.
*/
#if !defined(SQLITE_DEFAULT_MEMSTATUS)
# define SQLITE_DEFAULT_MEMSTATUS 1
#endif
/*
** Exactly one of the following macros must be defined in order to
** specify which memory allocation subsystem to use.
**
** SQLITE_SYSTEM_MALLOC // Use normal system malloc()
** SQLITE_WIN32_MALLOC // Use Win32 native heap API
** SQLITE_ZERO_MALLOC // Use a stub allocator that always fails
** SQLITE_MEMDEBUG // Debugging version of system malloc()
**
** On Windows, if the SQLITE_WIN32_MALLOC_VALIDATE macro is defined and the
** assert() macro is enabled, each call into the Win32 native heap subsystem
** will cause HeapValidate to be called. If heap validation should fail, an
** assertion will be triggered.
**
** If none of the above are defined, then set SQLITE_SYSTEM_MALLOC as
** the default.
*/
#if defined(SQLITE_SYSTEM_MALLOC) \
+ defined(SQLITE_WIN32_MALLOC) \
+ defined(SQLITE_ZERO_MALLOC) \
+ defined(SQLITE_MEMDEBUG)>1
# error "Two or more of the following compile-time configuration options\
are defined but at most one is allowed:\
SQLITE_SYSTEM_MALLOC, SQLITE_WIN32_MALLOC, SQLITE_MEMDEBUG,\
SQLITE_ZERO_MALLOC"
#endif
#if defined(SQLITE_SYSTEM_MALLOC) \
+ defined(SQLITE_WIN32_MALLOC) \
+ defined(SQLITE_ZERO_MALLOC) \
+ defined(SQLITE_MEMDEBUG)==0
# define SQLITE_SYSTEM_MALLOC 1
#endif
/*
** If SQLITE_MALLOC_SOFT_LIMIT is not zero, then try to keep the
** sizes of memory allocations below this value where possible.
*/
#if !defined(SQLITE_MALLOC_SOFT_LIMIT)
# define SQLITE_MALLOC_SOFT_LIMIT 1024
#endif
/*
** We need to define _XOPEN_SOURCE as follows in order to enable
** recursive mutexes on most Unix systems and fchmod() on OpenBSD.
** But _XOPEN_SOURCE define causes problems for Mac OS X, so omit
** it.
*/
#if !defined(_XOPEN_SOURCE) && !defined(__DARWIN__) && !defined(__APPLE__)
# define _XOPEN_SOURCE 600
#endif
/*
** NDEBUG and SQLITE_DEBUG are opposites. It should always be true that
** defined(NDEBUG)==!defined(SQLITE_DEBUG). If this is not currently true,
** make it true by defining or undefining NDEBUG.
**
** Setting NDEBUG makes the code smaller and faster by disabling the
** assert() statements in the code. So we want the default action
** to be for NDEBUG to be set and NDEBUG to be undefined only if SQLITE_DEBUG
** is set. Thus NDEBUG becomes an opt-in rather than an opt-out
** feature.
*/
#if !defined(NDEBUG) && !defined(SQLITE_DEBUG)
# define NDEBUG 1
#endif
#if defined(NDEBUG) && defined(SQLITE_DEBUG)
# undef NDEBUG
#endif
/*
** Enable SQLITE_ENABLE_EXPLAIN_COMMENTS if SQLITE_DEBUG is turned on.
*/
#if !defined(SQLITE_ENABLE_EXPLAIN_COMMENTS) && defined(SQLITE_DEBUG)
# define SQLITE_ENABLE_EXPLAIN_COMMENTS 1
#endif
/*
** The testcase() macro is used to aid in coverage testing. When
** doing coverage testing, the condition inside the argument to
** testcase() must be evaluated both true and false in order to
** get full branch coverage. The testcase() macro is inserted
** to help ensure adequate test coverage in places where simple
** condition/decision coverage is inadequate. For example, testcase()
** can be used to make sure boundary values are tested. For
** bitmask tests, testcase() can be used to make sure each bit
** is significant and used at least once. On switch statements
** where multiple cases go to the same block of code, testcase()
** can insure that all cases are evaluated.
**
*/
#ifdef SQLITE_COVERAGE_TEST
void sqlite3Coverage(int);
# define testcase(X) if( X ){ sqlite3Coverage(__LINE__); }
#else
# define testcase(X)
#endif
/*
** The TESTONLY macro is used to enclose variable declarations or
** other bits of code that are needed to support the arguments
** within testcase() and assert() macros.
*/
#if !defined(NDEBUG) || defined(SQLITE_COVERAGE_TEST)
# define TESTONLY(X) X
#else
# define TESTONLY(X)
#endif
/*
** Sometimes we need a small amount of code such as a variable initialization
** to setup for a later assert() statement. We do not want this code to
** appear when assert() is disabled. The following macro is therefore
** used to contain that setup code. The "VVA" acronym stands for
** "Verification, Validation, and Accreditation". In other words, the
** code within VVA_ONLY() will only run during verification processes.
*/
#ifndef NDEBUG
# define VVA_ONLY(X) X
#else
# define VVA_ONLY(X)
#endif
/*
** The ALWAYS and NEVER macros surround boolean expressions which
** are intended to always be true or false, respectively. Such
** expressions could be omitted from the code completely. But they
** are included in a few cases in order to enhance the resilience
** of SQLite to unexpected behavior - to make the code "self-healing"
** or "ductile" rather than being "brittle" and crashing at the first
** hint of unplanned behavior.
**
** In other words, ALWAYS and NEVER are added for defensive code.
**
** When doing coverage testing ALWAYS and NEVER are hard-coded to
** be true and false so that the unreachable code they specify will
** not be counted as untested code.
*/
#if defined(SQLITE_COVERAGE_TEST) || defined(SQLITE_MUTATION_TEST)
# define ALWAYS(X) (1)
# define NEVER(X) (0)
#elif !defined(NDEBUG)
# define ALWAYS(X) ((X)?1:(assert(0),0))
# define NEVER(X) ((X)?(assert(0),1):0)
#else
# define ALWAYS(X) (X)
# define NEVER(X) (X)
#endif
/*
** The harmless(X) macro indicates that expression X is usually false
** but can be true without causing any problems, but we don't know of
** any way to cause X to be true.
**
** In debugging and testing builds, this macro will abort if X is ever
** true. In this way, developers are alerted to a possible test case
** that causes X to be true. If a harmless macro ever fails, that is
** an opportunity to change the macro into a testcase() and add a new
** test case to the test suite.
**
** For normal production builds, harmless(X) is a no-op, since it does
** not matter whether expression X is true or false.
*/
#ifdef SQLITE_DEBUG
# define harmless(X) assert(!(X));
#else
# define harmless(X)
#endif
/*
** Some conditionals are optimizations only. In other words, if the
** conditionals are replaced with a constant 1 (true) or 0 (false) then
** the correct answer is still obtained, though perhaps not as quickly.
**
** The following macros mark these optimizations conditionals.
*/
#if defined(SQLITE_MUTATION_TEST)
# define OK_IF_ALWAYS_TRUE(X) (1)
# define OK_IF_ALWAYS_FALSE(X) (0)
#else
# define OK_IF_ALWAYS_TRUE(X) (X)
# define OK_IF_ALWAYS_FALSE(X) (X)
#endif
/*
** Some malloc failures are only possible if SQLITE_TEST_REALLOC_STRESS is
** defined. We need to defend against those failures when testing with
** SQLITE_TEST_REALLOC_STRESS, but we don't want the unreachable branches
** during a normal build. The following macro can be used to disable tests
** that are always false except when SQLITE_TEST_REALLOC_STRESS is set.
*/
#if defined(SQLITE_TEST_REALLOC_STRESS)
# define ONLY_IF_REALLOC_STRESS(X) (X)
#elif !defined(NDEBUG)
# define ONLY_IF_REALLOC_STRESS(X) ((X)?(assert(0),1):0)
#else
# define ONLY_IF_REALLOC_STRESS(X) (0)
#endif
/*
** Declarations used for tracing the operating system interfaces.
*/
#if defined(SQLITE_FORCE_OS_TRACE) || defined(SQLITE_TEST) || \
(defined(SQLITE_DEBUG) && SQLITE_OS_WIN)
extern int sqlite3OSTrace;
# define OSTRACE(X) if( sqlite3OSTrace ) sqlite3DebugPrintf X
# define SQLITE_HAVE_OS_TRACE
#else
# define OSTRACE(X)
# undef SQLITE_HAVE_OS_TRACE
#endif
/*
** Is the sqlite3ErrName() function needed in the build? Currently,
** it is needed by "mutex_w32.c" (when debugging), "os_win.c" (when
** OSTRACE is enabled), and by several "test*.c" files (which are
** compiled using SQLITE_TEST).
*/
#if defined(SQLITE_HAVE_OS_TRACE) || defined(SQLITE_TEST) || \
(defined(SQLITE_DEBUG) && SQLITE_OS_WIN)
# define SQLITE_NEED_ERR_NAME
#else
# undef SQLITE_NEED_ERR_NAME
#endif
/*
** SQLITE_ENABLE_EXPLAIN_COMMENTS is incompatible with SQLITE_OMIT_EXPLAIN
*/
#ifdef SQLITE_OMIT_EXPLAIN
# undef SQLITE_ENABLE_EXPLAIN_COMMENTS
#endif
/*
** Return true (non-zero) if the input is an integer that is too large
** to fit in 32-bits. This macro is used inside of various testcase()
** macros to verify that we have tested SQLite for large-file support.
*/
#define IS_BIG_INT(X) (((X)&~(i64)0xffffffff)!=0)
/*
** The macro unlikely() is a hint that surrounds a boolean
** expression that is usually false. Macro likely() surrounds
** a boolean expression that is usually true. These hints could,
** in theory, be used by the compiler to generate better code, but
** currently they are just comments for human readers.
*/
#define likely(X) (X)
#define unlikely(X) (X)
#include "hash.h"
#include "parse.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include <stddef.h>
/*
** Use a macro to replace memcpy() if compiled with SQLITE_INLINE_MEMCPY.
** This allows better measurements of where memcpy() is used when running
** cachegrind. But this macro version of memcpy() is very slow so it
** should not be used in production. This is a performance measurement
** hack only.
*/
#ifdef SQLITE_INLINE_MEMCPY
# define memcpy(D,S,N) {char*xxd=(char*)(D);const char*xxs=(const char*)(S);\
int xxn=(N);while(xxn-->0)*(xxd++)=*(xxs++);}
#endif
/*
** If compiling for a processor that lacks floating point support,
** substitute integer for floating-point
*/
#ifdef SQLITE_OMIT_FLOATING_POINT
# define double sqlite_int64
# define float sqlite_int64
# define LONGDOUBLE_TYPE sqlite_int64
# ifndef SQLITE_BIG_DBL
# define SQLITE_BIG_DBL (((sqlite3_int64)1)<<50)
# endif
# define SQLITE_OMIT_DATETIME_FUNCS 1
# define SQLITE_OMIT_TRACE 1
# undef SQLITE_MIXED_ENDIAN_64BIT_FLOAT
# undef SQLITE_HAVE_ISNAN
#endif
#ifndef SQLITE_BIG_DBL
# define SQLITE_BIG_DBL (1e99)
#endif
/*
** OMIT_TEMPDB is set to 1 if SQLITE_OMIT_TEMPDB is defined, or 0
** afterward. Having this macro allows us to cause the C compiler
** to omit code used by TEMP tables without messy #ifndef statements.
*/
#ifdef SQLITE_OMIT_TEMPDB
#define OMIT_TEMPDB 1
#else
#define OMIT_TEMPDB 0
#endif
/*
** The "file format" number is an integer that is incremented whenever
** the VDBE-level file format changes. The following macros define the
** the default file format for new databases and the maximum file format
** that the library can read.
*/
#define SQLITE_MAX_FILE_FORMAT 4
#ifndef SQLITE_DEFAULT_FILE_FORMAT
# define SQLITE_DEFAULT_FILE_FORMAT 4
#endif
/*
** Determine whether triggers are recursive by default. This can be
** changed at run-time using a pragma.
*/
#ifndef SQLITE_DEFAULT_RECURSIVE_TRIGGERS
# define SQLITE_DEFAULT_RECURSIVE_TRIGGERS 0
#endif
/*
** Provide a default value for SQLITE_TEMP_STORE in case it is not specified
** on the command-line
*/
#ifndef SQLITE_TEMP_STORE
# define SQLITE_TEMP_STORE 1
#endif
/*
** If no value has been provided for SQLITE_MAX_WORKER_THREADS, or if
** SQLITE_TEMP_STORE is set to 3 (never use temporary files), set it
** to zero.
*/
#if SQLITE_TEMP_STORE==3 || SQLITE_THREADSAFE==0
# undef SQLITE_MAX_WORKER_THREADS
# define SQLITE_MAX_WORKER_THREADS 0
#endif
#ifndef SQLITE_MAX_WORKER_THREADS
# define SQLITE_MAX_WORKER_THREADS 8
#endif
#ifndef SQLITE_DEFAULT_WORKER_THREADS
# define SQLITE_DEFAULT_WORKER_THREADS 0
#endif
#if SQLITE_DEFAULT_WORKER_THREADS>SQLITE_MAX_WORKER_THREADS
# undef SQLITE_MAX_WORKER_THREADS
# define SQLITE_MAX_WORKER_THREADS SQLITE_DEFAULT_WORKER_THREADS
#endif
/*
** The default initial allocation for the pagecache when using separate
** pagecaches for each database connection. A positive number is the
** number of pages. A negative number N translations means that a buffer
** of -1024*N bytes is allocated and used for as many pages as it will hold.
**
** The default value of "20" was choosen to minimize the run-time of the
** speedtest1 test program with options: --shrink-memory --reprepare
*/
#ifndef SQLITE_DEFAULT_PCACHE_INITSZ
# define SQLITE_DEFAULT_PCACHE_INITSZ 20
#endif
/*
** Default value for the SQLITE_CONFIG_SORTERREF_SIZE option.
*/
#ifndef SQLITE_DEFAULT_SORTERREF_SIZE
# define SQLITE_DEFAULT_SORTERREF_SIZE 0x7fffffff
#endif
/*
** The compile-time options SQLITE_MMAP_READWRITE and
** SQLITE_ENABLE_BATCH_ATOMIC_WRITE are not compatible with one another.
** You must choose one or the other (or neither) but not both.
*/
#if defined(SQLITE_MMAP_READWRITE) && defined(SQLITE_ENABLE_BATCH_ATOMIC_WRITE)
#error Cannot use both SQLITE_MMAP_READWRITE and SQLITE_ENABLE_BATCH_ATOMIC_WRITE
#endif
/*
** GCC does not define the offsetof() macro so we'll have to do it
** ourselves.
*/
#ifndef offsetof
#define offsetof(STRUCTURE,FIELD) ((int)((char*)&((STRUCTURE*)0)->FIELD))
#endif
/*
** Macros to compute minimum and maximum of two numbers.
*/
#ifndef MIN
# define MIN(A,B) ((A)<(B)?(A):(B))
#endif
#ifndef MAX
# define MAX(A,B) ((A)>(B)?(A):(B))
#endif
/*
** Swap two objects of type TYPE.
*/
#define SWAP(TYPE,A,B) {TYPE t=A; A=B; B=t;}
/*
** Check to see if this machine uses EBCDIC. (Yes, believe it or
** not, there are still machines out there that use EBCDIC.)
*/
#if 'A' == '\301'
# define SQLITE_EBCDIC 1
#else
# define SQLITE_ASCII 1
#endif
/*
** Integers of known sizes. These typedefs might change for architectures
** where the sizes very. Preprocessor macros are available so that the
** types can be conveniently redefined at compile-type. Like this:
**
** cc '-DUINTPTR_TYPE=long long int' ...
*/
#ifndef UINT32_TYPE
# ifdef HAVE_UINT32_T
# define UINT32_TYPE uint32_t
# else
# define UINT32_TYPE unsigned int
# endif
#endif
#ifndef UINT16_TYPE
# ifdef HAVE_UINT16_T
# define UINT16_TYPE uint16_t
# else
# define UINT16_TYPE unsigned short int
# endif
#endif
#ifndef INT16_TYPE
# ifdef HAVE_INT16_T
# define INT16_TYPE int16_t
# else
# define INT16_TYPE short int
# endif
#endif
#ifndef UINT8_TYPE
# ifdef HAVE_UINT8_T
# define UINT8_TYPE uint8_t
# else
# define UINT8_TYPE unsigned char
# endif
#endif
#ifndef INT8_TYPE
# ifdef HAVE_INT8_T
# define INT8_TYPE int8_t
# else
# define INT8_TYPE signed char
# endif
#endif
#ifndef LONGDOUBLE_TYPE
# define LONGDOUBLE_TYPE long double
#endif
typedef sqlite_int64 i64; /* 8-byte signed integer */
typedef sqlite_uint64 u64; /* 8-byte unsigned integer */
typedef UINT32_TYPE u32; /* 4-byte unsigned integer */
typedef UINT16_TYPE u16; /* 2-byte unsigned integer */
typedef INT16_TYPE i16; /* 2-byte signed integer */
typedef UINT8_TYPE u8; /* 1-byte unsigned integer */
typedef INT8_TYPE i8; /* 1-byte signed integer */
/*
** SQLITE_MAX_U32 is a u64 constant that is the maximum u64 value
** that can be stored in a u32 without loss of data. The value
** is 0x00000000ffffffff. But because of quirks of some compilers, we
** have to specify the value in the less intuitive manner shown:
*/
#define SQLITE_MAX_U32 ((((u64)1)<<32)-1)
/*
** The datatype used to store estimates of the number of rows in a
** table or index. This is an unsigned integer type. For 99.9% of
** the world, a 32-bit integer is sufficient. But a 64-bit integer
** can be used at compile-time if desired.
*/
#ifdef SQLITE_64BIT_STATS
typedef u64 tRowcnt; /* 64-bit only if requested at compile-time */
#else
typedef u32 tRowcnt; /* 32-bit is the default */
#endif
/*
** Estimated quantities used for query planning are stored as 16-bit
** logarithms. For quantity X, the value stored is 10*log2(X). This
** gives a possible range of values of approximately 1.0e986 to 1e-986.
** But the allowed values are "grainy". Not every value is representable.
** For example, quantities 16 and 17 are both represented by a LogEst
** of 40. However, since LogEst quantities are suppose to be estimates,
** not exact values, this imprecision is not a problem.
**
** "LogEst" is short for "Logarithmic Estimate".
**
** Examples:
** 1 -> 0 20 -> 43 10000 -> 132
** 2 -> 10 25 -> 46 25000 -> 146
** 3 -> 16 100 -> 66 1000000 -> 199
** 4 -> 20 1000 -> 99 1048576 -> 200
** 10 -> 33 1024 -> 100 4294967296 -> 320
**
** The LogEst can be negative to indicate fractional values.
** Examples:
**
** 0.5 -> -10 0.1 -> -33 0.0625 -> -40
*/
typedef INT16_TYPE LogEst;
/*
** Set the SQLITE_PTRSIZE macro to the number of bytes in a pointer
*/
#ifndef SQLITE_PTRSIZE
# if defined(__SIZEOF_POINTER__)
# define SQLITE_PTRSIZE __SIZEOF_POINTER__
# elif defined(i386) || defined(__i386__) || defined(_M_IX86) || \
defined(_M_ARM) || defined(__arm__) || defined(__x86) || \
(defined(__TOS_AIX__) && !defined(__64BIT__))
# define SQLITE_PTRSIZE 4
# else
# define SQLITE_PTRSIZE 8
# endif
#endif
/* The uptr type is an unsigned integer large enough to hold a pointer
*/
#if defined(HAVE_STDINT_H)
typedef uintptr_t uptr;
#elif SQLITE_PTRSIZE==4
typedef u32 uptr;
#else
typedef u64 uptr;
#endif
/*
** The SQLITE_WITHIN(P,S,E) macro checks to see if pointer P points to
** something between S (inclusive) and E (exclusive).
**
** In other words, S is a buffer and E is a pointer to the first byte after
** the end of buffer S. This macro returns true if P points to something
** contained within the buffer S.
*/
#define SQLITE_WITHIN(P,S,E) (((uptr)(P)>=(uptr)(S))&&((uptr)(P)<(uptr)(E)))
/*
** Macros to determine whether the machine is big or little endian,
** and whether or not that determination is run-time or compile-time.
**
** For best performance, an attempt is made to guess at the byte-order
** using C-preprocessor macros. If that is unsuccessful, or if
** -DSQLITE_BYTEORDER=0 is set, then byte-order is determined
** at run-time.
*/
#ifndef SQLITE_BYTEORDER
# if defined(i386) || defined(__i386__) || defined(_M_IX86) || \
defined(__x86_64) || defined(__x86_64__) || defined(_M_X64) || \
defined(_M_AMD64) || defined(_M_ARM) || defined(__x86) || \
defined(__ARMEL__) || defined(__AARCH64EL__) || defined(_M_ARM64)
# define SQLITE_BYTEORDER 1234
# elif defined(sparc) || defined(__ppc__) || \
defined(__ARMEB__) || defined(__AARCH64EB__)
# define SQLITE_BYTEORDER 4321
# else
# define SQLITE_BYTEORDER 0
# endif
#endif
#if SQLITE_BYTEORDER==4321
# define SQLITE_BIGENDIAN 1
# define SQLITE_LITTLEENDIAN 0
# define SQLITE_UTF16NATIVE SQLITE_UTF16BE
#elif SQLITE_BYTEORDER==1234
# define SQLITE_BIGENDIAN 0
# define SQLITE_LITTLEENDIAN 1
# define SQLITE_UTF16NATIVE SQLITE_UTF16LE
#else
# ifdef SQLITE_AMALGAMATION
const int sqlite3one = 1;
# else
extern const int sqlite3one;
# endif
# define SQLITE_BIGENDIAN (*(char *)(&sqlite3one)==0)
# define SQLITE_LITTLEENDIAN (*(char *)(&sqlite3one)==1)
# define SQLITE_UTF16NATIVE (SQLITE_BIGENDIAN?SQLITE_UTF16BE:SQLITE_UTF16LE)
#endif
/*
** Constants for the largest and smallest possible 64-bit signed integers.
** These macros are designed to work correctly on both 32-bit and 64-bit
** compilers.
*/
#define LARGEST_INT64 (0xffffffff|(((i64)0x7fffffff)<<32))
#define LARGEST_UINT64 (0xffffffff|(((u64)0xffffffff)<<32))
#define SMALLEST_INT64 (((i64)-1) - LARGEST_INT64)
/*
** Round up a number to the next larger multiple of 8. This is used
** to force 8-byte alignment on 64-bit architectures.
*/
#define ROUND8(x) (((x)+7)&~7)
/*
** Round down to the nearest multiple of 8
*/
#define ROUNDDOWN8(x) ((x)&~7)
/*
** Assert that the pointer X is aligned to an 8-byte boundary. This
** macro is used only within assert() to verify that the code gets
** all alignment restrictions correct.
**
** Except, if SQLITE_4_BYTE_ALIGNED_MALLOC is defined, then the
** underlying malloc() implementation might return us 4-byte aligned
** pointers. In that case, only verify 4-byte alignment.
*/
#ifdef SQLITE_4_BYTE_ALIGNED_MALLOC
# define EIGHT_BYTE_ALIGNMENT(X) ((((char*)(X) - (char*)0)&3)==0)
#else
# define EIGHT_BYTE_ALIGNMENT(X) ((((char*)(X) - (char*)0)&7)==0)
#endif
/*
** Disable MMAP on platforms where it is known to not work
*/
#if defined(__OpenBSD__) || defined(__QNXNTO__)
# undef SQLITE_MAX_MMAP_SIZE
# define SQLITE_MAX_MMAP_SIZE 0
#endif
/*
** Default maximum size of memory used by memory-mapped I/O in the VFS
*/
#ifdef __APPLE__
# include <TargetConditionals.h>
#endif
#ifndef SQLITE_MAX_MMAP_SIZE
# if defined(__linux__) \
|| defined(_WIN32) \
|| (defined(__APPLE__) && defined(__MACH__)) \
|| defined(__sun) \
|| defined(__FreeBSD__) \
|| defined(__DragonFly__)
# define SQLITE_MAX_MMAP_SIZE 0x7fff0000 /* 2147418112 */
# else
# define SQLITE_MAX_MMAP_SIZE 0
# endif
#endif
/*
** The default MMAP_SIZE is zero on all platforms. Or, even if a larger
** default MMAP_SIZE is specified at compile-time, make sure that it does
** not exceed the maximum mmap size.
*/
#ifndef SQLITE_DEFAULT_MMAP_SIZE
# define SQLITE_DEFAULT_MMAP_SIZE 0
#endif
#if SQLITE_DEFAULT_MMAP_SIZE>SQLITE_MAX_MMAP_SIZE
# undef SQLITE_DEFAULT_MMAP_SIZE
# define SQLITE_DEFAULT_MMAP_SIZE SQLITE_MAX_MMAP_SIZE
#endif
/*
** SELECTTRACE_ENABLED will be either 1 or 0 depending on whether or not
** the Select query generator tracing logic is turned on.
*/
#if !defined(SQLITE_AMALGAMATION)