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internal/libpq/pqcomm.h 0000644 00000015017 15051110356 0011135 0 ustar 00 /*-------------------------------------------------------------------------
*
* pqcomm.h
* Definitions common to frontends and backends.
*
* NOTE: for historical reasons, this does not correspond to pqcomm.c.
* pqcomm.c's routines are declared in libpq.h.
*
* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/libpq/pqcomm.h
*
*-------------------------------------------------------------------------
*/
#ifndef PQCOMM_H
#define PQCOMM_H
#include <sys/socket.h>
#include <netdb.h>
#ifdef HAVE_SYS_UN_H
#include <sys/un.h>
#endif
#include <netinet/in.h>
#ifdef HAVE_STRUCT_SOCKADDR_STORAGE
#ifndef HAVE_STRUCT_SOCKADDR_STORAGE_SS_FAMILY
#ifdef HAVE_STRUCT_SOCKADDR_STORAGE___SS_FAMILY
#define ss_family __ss_family
#else
#error struct sockaddr_storage does not provide an ss_family member
#endif
#endif
#ifdef HAVE_STRUCT_SOCKADDR_STORAGE___SS_LEN
#define ss_len __ss_len
#define HAVE_STRUCT_SOCKADDR_STORAGE_SS_LEN 1
#endif
#else /* !HAVE_STRUCT_SOCKADDR_STORAGE */
/* Define a struct sockaddr_storage if we don't have one. */
struct sockaddr_storage
{
union
{
struct sockaddr sa; /* get the system-dependent fields */
int64 ss_align; /* ensures struct is properly aligned */
char ss_pad[128]; /* ensures struct has desired size */
} ss_stuff;
};
#define ss_family ss_stuff.sa.sa_family
/* It should have an ss_len field if sockaddr has sa_len. */
#ifdef HAVE_STRUCT_SOCKADDR_SA_LEN
#define ss_len ss_stuff.sa.sa_len
#define HAVE_STRUCT_SOCKADDR_STORAGE_SS_LEN 1
#endif
#endif /* HAVE_STRUCT_SOCKADDR_STORAGE */
typedef struct
{
struct sockaddr_storage addr;
ACCEPT_TYPE_ARG3 salen;
} SockAddr;
/* Configure the UNIX socket location for the well known port. */
#define UNIXSOCK_PATH(path, port, sockdir) \
(AssertMacro(sockdir), \
AssertMacro(*(sockdir) != '\0'), \
snprintf(path, sizeof(path), "%s/.s.PGSQL.%d", \
(sockdir), (port)))
/*
* The maximum workable length of a socket path is what will fit into
* struct sockaddr_un. This is usually only 100 or so bytes :-(.
*
* For consistency, always pass a MAXPGPATH-sized buffer to UNIXSOCK_PATH(),
* then complain if the resulting string is >= UNIXSOCK_PATH_BUFLEN bytes.
* (Because the standard API for getaddrinfo doesn't allow it to complain in
* a useful way when the socket pathname is too long, we have to test for
* this explicitly, instead of just letting the subroutine return an error.)
*/
#define UNIXSOCK_PATH_BUFLEN sizeof(((struct sockaddr_un *) NULL)->sun_path)
/*
* These manipulate the frontend/backend protocol version number.
*
* The major number should be incremented for incompatible changes. The minor
* number should be incremented for compatible changes (eg. additional
* functionality).
*
* If a backend supports version m.n of the protocol it must actually support
* versions m.[0..n]. Backend support for version m-1 can be dropped after a
* `reasonable' length of time.
*
* A frontend isn't required to support anything other than the current
* version.
*/
#define PG_PROTOCOL_MAJOR(v) ((v) >> 16)
#define PG_PROTOCOL_MINOR(v) ((v) & 0x0000ffff)
#define PG_PROTOCOL(m,n) (((m) << 16) | (n))
/* The earliest and latest frontend/backend protocol version supported. */
#define PG_PROTOCOL_EARLIEST PG_PROTOCOL(2,0)
#define PG_PROTOCOL_LATEST PG_PROTOCOL(3,0)
typedef uint32 ProtocolVersion; /* FE/BE protocol version number */
typedef ProtocolVersion MsgType;
/*
* Packet lengths are 4 bytes in network byte order.
*
* The initial length is omitted from the packet layouts appearing below.
*/
typedef uint32 PacketLen;
/*
* Old-style startup packet layout with fixed-width fields. This is used in
* protocol 1.0 and 2.0, but not in later versions. Note that the fields
* in this layout are '\0' terminated only if there is room.
*/
#define SM_DATABASE 64
#define SM_USER 32
/* We append database name if db_user_namespace true. */
#define SM_DATABASE_USER (SM_DATABASE+SM_USER+1) /* +1 for @ */
#define SM_OPTIONS 64
#define SM_UNUSED 64
#define SM_TTY 64
typedef struct StartupPacket
{
ProtocolVersion protoVersion; /* Protocol version */
char database[SM_DATABASE]; /* Database name */
/* Db_user_namespace appends dbname */
char user[SM_USER]; /* User name */
char options[SM_OPTIONS]; /* Optional additional args */
char unused[SM_UNUSED]; /* Unused */
char tty[SM_TTY]; /* Tty for debug output */
} StartupPacket;
extern bool Db_user_namespace;
/*
* In protocol 3.0 and later, the startup packet length is not fixed, but
* we set an arbitrary limit on it anyway. This is just to prevent simple
* denial-of-service attacks via sending enough data to run the server
* out of memory.
*/
#define MAX_STARTUP_PACKET_LENGTH 10000
/* These are the authentication request codes sent by the backend. */
#define AUTH_REQ_OK 0 /* User is authenticated */
#define AUTH_REQ_KRB4 1 /* Kerberos V4. Not supported any more. */
#define AUTH_REQ_KRB5 2 /* Kerberos V5. Not supported any more. */
#define AUTH_REQ_PASSWORD 3 /* Password */
#define AUTH_REQ_CRYPT 4 /* crypt password. Not supported any more. */
#define AUTH_REQ_MD5 5 /* md5 password */
#define AUTH_REQ_SCM_CREDS 6 /* transfer SCM credentials */
#define AUTH_REQ_GSS 7 /* GSSAPI without wrap() */
#define AUTH_REQ_GSS_CONT 8 /* Continue GSS exchanges */
#define AUTH_REQ_SSPI 9 /* SSPI negotiate without wrap() */
#define AUTH_REQ_SASL 10 /* Begin SASL authentication */
#define AUTH_REQ_SASL_CONT 11 /* Continue SASL authentication */
#define AUTH_REQ_SASL_FIN 12 /* Final SASL message */
typedef uint32 AuthRequest;
/*
* A client can also send a cancel-current-operation request to the postmaster.
* This is uglier than sending it directly to the client's backend, but it
* avoids depending on out-of-band communication facilities.
*
* The cancel request code must not match any protocol version number
* we're ever likely to use. This random choice should do.
*/
#define CANCEL_REQUEST_CODE PG_PROTOCOL(1234,5678)
typedef struct CancelRequestPacket
{
/* Note that each field is stored in network byte order! */
MsgType cancelRequestCode; /* code to identify a cancel request */
uint32 backendPID; /* PID of client's backend */
uint32 cancelAuthCode; /* secret key to authorize cancel */
} CancelRequestPacket;
/*
* A client can also start by sending a SSL or GSSAPI negotiation request to
* get a secure channel.
*/
#define NEGOTIATE_SSL_CODE PG_PROTOCOL(1234,5679)
#define NEGOTIATE_GSS_CODE PG_PROTOCOL(1234,5680)
#endif /* PQCOMM_H */
internal/c.h 0000644 00000127324 15051110356 0006761 0 ustar 00 /*-------------------------------------------------------------------------
*
* c.h
* Fundamental C definitions. This is included by every .c file in
* PostgreSQL (via either postgres.h or postgres_fe.h, as appropriate).
*
* Note that the definitions here are not intended to be exposed to clients
* of the frontend interface libraries --- so we don't worry much about
* polluting the namespace with lots of stuff...
*
*
* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/c.h
*
*-------------------------------------------------------------------------
*/
/*
*----------------------------------------------------------------
* TABLE OF CONTENTS
*
* When adding stuff to this file, please try to put stuff
* into the relevant section, or add new sections as appropriate.
*
* section description
* ------- ------------------------------------------------
* 0) pg_config.h and standard system headers
* 1) compiler characteristics
* 2) bool, true, false
* 3) standard system types
* 4) IsValid macros for system types
* 5) offsetof, lengthof, alignment
* 6) assertions
* 7) widely useful macros
* 8) random stuff
* 9) system-specific hacks
*
* NOTE: since this file is included by both frontend and backend modules,
* it's usually wrong to put an "extern" declaration here, unless it's
* ifdef'd so that it's seen in only one case or the other.
* typedefs and macros are the kind of thing that might go here.
*
*----------------------------------------------------------------
*/
#ifndef C_H
#define C_H
#include "postgres_ext.h"
/* Must undef pg_config_ext.h symbols before including pg_config.h */
#undef PG_INT64_TYPE
#include "pg_config.h"
#include "pg_config_manual.h" /* must be after pg_config.h */
#include "pg_config_os.h" /* must be before any system header files */
/* System header files that should be available everywhere in Postgres */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stddef.h>
#include <stdarg.h>
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#include <stdint.h>
#include <sys/types.h>
#include <errno.h>
#if defined(WIN32) || defined(__CYGWIN__)
#include <fcntl.h> /* ensure O_BINARY is available */
#endif
#include <locale.h>
#ifdef ENABLE_NLS
#include <libintl.h>
#endif
/* ----------------------------------------------------------------
* Section 1: compiler characteristics
*
* type prefixes (const, signed, volatile, inline) are handled in pg_config.h.
* ----------------------------------------------------------------
*/
/*
* Disable "inline" if PG_FORCE_DISABLE_INLINE is defined.
* This is used to work around compiler bugs and might also be useful for
* investigatory purposes.
*/
#ifdef PG_FORCE_DISABLE_INLINE
#undef inline
#define inline
#endif
/*
* Attribute macros
*
* GCC: https://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html
* GCC: https://gcc.gnu.org/onlinedocs/gcc/Type-Attributes.html
* Sunpro: https://docs.oracle.com/cd/E18659_01/html/821-1384/gjzke.html
* XLC: https://www.ibm.com/support/knowledgecenter/SSGH2K_13.1.2/com.ibm.xlc131.aix.doc/language_ref/function_attributes.html
* XLC: https://www.ibm.com/support/knowledgecenter/SSGH2K_13.1.2/com.ibm.xlc131.aix.doc/language_ref/type_attrib.html
*/
/* only GCC supports the unused attribute */
#ifdef __GNUC__
#define pg_attribute_unused() __attribute__((unused))
#else
#define pg_attribute_unused()
#endif
/*
* Place this macro before functions that should be allowed to make misaligned
* accesses. Think twice before using it on non-x86-specific code!
* Testing can be done with "-fsanitize=alignment -fsanitize-trap=alignment"
* on clang, or "-fsanitize=alignment -fno-sanitize-recover=alignment" on gcc.
*/
#if __clang_major__ >= 7 || __GNUC__ >= 8
#define pg_attribute_no_sanitize_alignment() __attribute__((no_sanitize("alignment")))
#else
#define pg_attribute_no_sanitize_alignment()
#endif
/*
* Append PG_USED_FOR_ASSERTS_ONLY to definitions of variables that are only
* used in assert-enabled builds, to avoid compiler warnings about unused
* variables in assert-disabled builds.
*/
#ifdef USE_ASSERT_CHECKING
#define PG_USED_FOR_ASSERTS_ONLY
#else
#define PG_USED_FOR_ASSERTS_ONLY pg_attribute_unused()
#endif
/* GCC and XLC support format attributes */
#if defined(__GNUC__) || defined(__IBMC__)
#define pg_attribute_format_arg(a) __attribute__((format_arg(a)))
#define pg_attribute_printf(f,a) __attribute__((format(PG_PRINTF_ATTRIBUTE, f, a)))
#else
#define pg_attribute_format_arg(a)
#define pg_attribute_printf(f,a)
#endif
/* GCC, Sunpro and XLC support aligned, packed and noreturn */
#if defined(__GNUC__) || defined(__SUNPRO_C) || defined(__IBMC__)
#define pg_attribute_aligned(a) __attribute__((aligned(a)))
#define pg_attribute_noreturn() __attribute__((noreturn))
#define pg_attribute_packed() __attribute__((packed))
#define HAVE_PG_ATTRIBUTE_NORETURN 1
#else
/*
* NB: aligned and packed are not given default definitions because they
* affect code functionality; they *must* be implemented by the compiler
* if they are to be used.
*/
#define pg_attribute_noreturn()
#endif
/*
* Use "pg_attribute_always_inline" in place of "inline" for functions that
* we wish to force inlining of, even when the compiler's heuristics would
* choose not to. But, if possible, don't force inlining in unoptimized
* debug builds.
*/
#if (defined(__GNUC__) && __GNUC__ > 3 && defined(__OPTIMIZE__)) || defined(__SUNPRO_C) || defined(__IBMC__)
/* GCC > 3, Sunpro and XLC support always_inline via __attribute__ */
#define pg_attribute_always_inline __attribute__((always_inline)) inline
#elif defined(_MSC_VER)
/* MSVC has a special keyword for this */
#define pg_attribute_always_inline __forceinline
#else
/* Otherwise, the best we can do is to say "inline" */
#define pg_attribute_always_inline inline
#endif
/*
* Forcing a function not to be inlined can be useful if it's the slow path of
* a performance-critical function, or should be visible in profiles to allow
* for proper cost attribution. Note that unlike the pg_attribute_XXX macros
* above, this should be placed before the function's return type and name.
*/
/* GCC, Sunpro and XLC support noinline via __attribute__ */
#if (defined(__GNUC__) && __GNUC__ > 2) || defined(__SUNPRO_C) || defined(__IBMC__)
#define pg_noinline __attribute__((noinline))
/* msvc via declspec */
#elif defined(_MSC_VER)
#define pg_noinline __declspec(noinline)
#else
#define pg_noinline
#endif
/*
* Mark a point as unreachable in a portable fashion. This should preferably
* be something that the compiler understands, to aid code generation.
* In assert-enabled builds, we prefer abort() for debugging reasons.
*/
#if defined(HAVE__BUILTIN_UNREACHABLE) && !defined(USE_ASSERT_CHECKING)
#define pg_unreachable() __builtin_unreachable()
#elif defined(_MSC_VER) && !defined(USE_ASSERT_CHECKING)
#define pg_unreachable() __assume(0)
#else
#define pg_unreachable() abort()
#endif
/*
* Hints to the compiler about the likelihood of a branch. Both likely() and
* unlikely() return the boolean value of the contained expression.
*
* These should only be used sparingly, in very hot code paths. It's very easy
* to mis-estimate likelihoods.
*/
#if __GNUC__ >= 3
#define likely(x) __builtin_expect((x) != 0, 1)
#define unlikely(x) __builtin_expect((x) != 0, 0)
#else
#define likely(x) ((x) != 0)
#define unlikely(x) ((x) != 0)
#endif
/*
* CppAsString
* Convert the argument to a string, using the C preprocessor.
* CppAsString2
* Convert the argument to a string, after one round of macro expansion.
* CppConcat
* Concatenate two arguments together, using the C preprocessor.
*
* Note: There used to be support here for pre-ANSI C compilers that didn't
* support # and ##. Nowadays, these macros are just for clarity and/or
* backward compatibility with existing PostgreSQL code.
*/
#define CppAsString(identifier) #identifier
#define CppAsString2(x) CppAsString(x)
#define CppConcat(x, y) x##y
/*
* VA_ARGS_NARGS
* Returns the number of macro arguments it is passed.
*
* An empty argument still counts as an argument, so effectively, this is
* "one more than the number of commas in the argument list".
*
* This works for up to 63 arguments. Internally, VA_ARGS_NARGS_() is passed
* 64+N arguments, and the C99 standard only requires macros to allow up to
* 127 arguments, so we can't portably go higher. The implementation is
* pretty trivial: VA_ARGS_NARGS_() returns its 64th argument, and we set up
* the call so that that is the appropriate one of the list of constants.
* This idea is due to Laurent Deniau.
*/
#define VA_ARGS_NARGS(...) \
VA_ARGS_NARGS_(__VA_ARGS__, \
63,62,61,60, \
59,58,57,56,55,54,53,52,51,50, \
49,48,47,46,45,44,43,42,41,40, \
39,38,37,36,35,34,33,32,31,30, \
29,28,27,26,25,24,23,22,21,20, \
19,18,17,16,15,14,13,12,11,10, \
9, 8, 7, 6, 5, 4, 3, 2, 1, 0)
#define VA_ARGS_NARGS_( \
_01,_02,_03,_04,_05,_06,_07,_08,_09,_10, \
_11,_12,_13,_14,_15,_16,_17,_18,_19,_20, \
_21,_22,_23,_24,_25,_26,_27,_28,_29,_30, \
_31,_32,_33,_34,_35,_36,_37,_38,_39,_40, \
_41,_42,_43,_44,_45,_46,_47,_48,_49,_50, \
_51,_52,_53,_54,_55,_56,_57,_58,_59,_60, \
_61,_62,_63, N, ...) \
(N)
/*
* dummyret is used to set return values in macros that use ?: to make
* assignments. gcc wants these to be void, other compilers like char
*/
#ifdef __GNUC__ /* GNU cc */
#define dummyret void
#else
#define dummyret char
#endif
/*
* Generic function pointer. This can be used in the rare cases where it's
* necessary to cast a function pointer to a seemingly incompatible function
* pointer type while avoiding gcc's -Wcast-function-type warnings.
*/
typedef void (*pg_funcptr_t) (void);
/*
* We require C99, hence the compiler should understand flexible array
* members. However, for documentation purposes we still consider it to be
* project style to write "field[FLEXIBLE_ARRAY_MEMBER]" not just "field[]".
* When computing the size of such an object, use "offsetof(struct s, f)"
* for portability. Don't use "offsetof(struct s, f[0])", as this doesn't
* work with MSVC and with C++ compilers.
*/
#define FLEXIBLE_ARRAY_MEMBER /* empty */
/* Which __func__ symbol do we have, if any? */
#ifdef HAVE_FUNCNAME__FUNC
#define PG_FUNCNAME_MACRO __func__
#else
#ifdef HAVE_FUNCNAME__FUNCTION
#define PG_FUNCNAME_MACRO __FUNCTION__
#else
#define PG_FUNCNAME_MACRO NULL
#endif
#endif
/*
* Does the compiler support #pragma GCC system_header? We optionally use it
* to avoid warnings that we can't fix (e.g. in the perl headers).
* See https://gcc.gnu.org/onlinedocs/cpp/System-Headers.html
*
* Headers for which we do not want to show compiler warnings can,
* conditionally, use #pragma GCC system_header to avoid warnings. Obviously
* this should only be used for external headers over which we do not have
* control.
*
* Support for the pragma is tested here, instead of during configure, as gcc
* also warns about the pragma being used in a .c file. It's surprisingly hard
* to get autoconf to use .h as the file-ending. Looks like gcc has
* implemented the pragma since the 2000, so this test should suffice.
*
*
* Alternatively, we could add the include paths for problematic headers with
* -isystem, but that is a larger hammer and is harder to search for.
*
* A more granular alternative would be to use #pragma GCC diagnostic
* push/ignored/pop, but gcc warns about unknown warnings being ignored, so
* every to-be-ignored-temporarily compiler warning would require its own
* pg_config.h symbol and #ifdef.
*/
#ifdef __GNUC__
#define HAVE_PRAGMA_GCC_SYSTEM_HEADER 1
#endif
/* ----------------------------------------------------------------
* Section 2: bool, true, false
* ----------------------------------------------------------------
*/
/*
* bool
* Boolean value, either true or false.
*
* We use stdbool.h if bool has size 1 after including it. That's useful for
* better compiler and debugger output and for compatibility with third-party
* libraries. But PostgreSQL currently cannot deal with bool of other sizes;
* there are static assertions around the code to prevent that.
*
* For C++ compilers, we assume the compiler has a compatible built-in
* definition of bool.
*
* See also the version of this code in src/interfaces/ecpg/include/ecpglib.h.
*/
#ifndef __cplusplus
#ifdef PG_USE_STDBOOL
#include <stdbool.h>
#else
#ifndef bool
typedef unsigned char bool;
#endif
#ifndef true
#define true ((bool) 1)
#endif
#ifndef false
#define false ((bool) 0)
#endif
#endif /* not PG_USE_STDBOOL */
#endif /* not C++ */
/* ----------------------------------------------------------------
* Section 3: standard system types
* ----------------------------------------------------------------
*/
/*
* Pointer
* Variable holding address of any memory resident object.
*
* XXX Pointer arithmetic is done with this, so it can't be void *
* under "true" ANSI compilers.
*/
typedef char *Pointer;
/*
* intN
* Signed integer, EXACTLY N BITS IN SIZE,
* used for numerical computations and the
* frontend/backend protocol.
*/
#ifndef HAVE_INT8
typedef signed char int8; /* == 8 bits */
typedef signed short int16; /* == 16 bits */
typedef signed int int32; /* == 32 bits */
#endif /* not HAVE_INT8 */
/*
* uintN
* Unsigned integer, EXACTLY N BITS IN SIZE,
* used for numerical computations and the
* frontend/backend protocol.
*/
#ifndef HAVE_UINT8
typedef unsigned char uint8; /* == 8 bits */
typedef unsigned short uint16; /* == 16 bits */
typedef unsigned int uint32; /* == 32 bits */
#endif /* not HAVE_UINT8 */
/*
* bitsN
* Unit of bitwise operation, AT LEAST N BITS IN SIZE.
*/
typedef uint8 bits8; /* >= 8 bits */
typedef uint16 bits16; /* >= 16 bits */
typedef uint32 bits32; /* >= 32 bits */
/*
* 64-bit integers
*/
#ifdef HAVE_LONG_INT_64
/* Plain "long int" fits, use it */
#ifndef HAVE_INT64
typedef long int int64;
#endif
#ifndef HAVE_UINT64
typedef unsigned long int uint64;
#endif
#define INT64CONST(x) (x##L)
#define UINT64CONST(x) (x##UL)
#elif defined(HAVE_LONG_LONG_INT_64)
/* We have working support for "long long int", use that */
#ifndef HAVE_INT64
typedef long long int int64;
#endif
#ifndef HAVE_UINT64
typedef unsigned long long int uint64;
#endif
#define INT64CONST(x) (x##LL)
#define UINT64CONST(x) (x##ULL)
#else
/* neither HAVE_LONG_INT_64 nor HAVE_LONG_LONG_INT_64 */
#error must have a working 64-bit integer datatype
#endif
/* snprintf format strings to use for 64-bit integers */
#define INT64_FORMAT "%" INT64_MODIFIER "d"
#define UINT64_FORMAT "%" INT64_MODIFIER "u"
/*
* 128-bit signed and unsigned integers
* There currently is only limited support for such types.
* E.g. 128bit literals and snprintf are not supported; but math is.
* Also, because we exclude such types when choosing MAXIMUM_ALIGNOF,
* it must be possible to coerce the compiler to allocate them on no
* more than MAXALIGN boundaries.
*/
#if defined(PG_INT128_TYPE)
#if defined(pg_attribute_aligned) || ALIGNOF_PG_INT128_TYPE <= MAXIMUM_ALIGNOF
#define HAVE_INT128 1
typedef PG_INT128_TYPE int128
#if defined(pg_attribute_aligned)
pg_attribute_aligned(MAXIMUM_ALIGNOF)
#endif
;
typedef unsigned PG_INT128_TYPE uint128
#if defined(pg_attribute_aligned)
pg_attribute_aligned(MAXIMUM_ALIGNOF)
#endif
;
#endif
#endif
/*
* stdint.h limits aren't guaranteed to have compatible types with our fixed
* width types. So just define our own.
*/
#define PG_INT8_MIN (-0x7F-1)
#define PG_INT8_MAX (0x7F)
#define PG_UINT8_MAX (0xFF)
#define PG_INT16_MIN (-0x7FFF-1)
#define PG_INT16_MAX (0x7FFF)
#define PG_UINT16_MAX (0xFFFF)
#define PG_INT32_MIN (-0x7FFFFFFF-1)
#define PG_INT32_MAX (0x7FFFFFFF)
#define PG_UINT32_MAX (0xFFFFFFFFU)
#define PG_INT64_MIN (-INT64CONST(0x7FFFFFFFFFFFFFFF) - 1)
#define PG_INT64_MAX INT64CONST(0x7FFFFFFFFFFFFFFF)
#define PG_UINT64_MAX UINT64CONST(0xFFFFFFFFFFFFFFFF)
/*
* We now always use int64 timestamps, but keep this symbol defined for the
* benefit of external code that might test it.
*/
#define HAVE_INT64_TIMESTAMP
/*
* Size
* Size of any memory resident object, as returned by sizeof.
*/
typedef size_t Size;
/*
* Index
* Index into any memory resident array.
*
* Note:
* Indices are non negative.
*/
typedef unsigned int Index;
/*
* Offset
* Offset into any memory resident array.
*
* Note:
* This differs from an Index in that an Index is always
* non negative, whereas Offset may be negative.
*/
typedef signed int Offset;
/*
* Common Postgres datatype names (as used in the catalogs)
*/
typedef float float4;
typedef double float8;
#ifdef USE_FLOAT8_BYVAL
#define FLOAT8PASSBYVAL true
#else
#define FLOAT8PASSBYVAL false
#endif
/*
* Oid, RegProcedure, TransactionId, SubTransactionId, MultiXactId,
* CommandId
*/
/* typedef Oid is in postgres_ext.h */
/*
* regproc is the type name used in the include/catalog headers, but
* RegProcedure is the preferred name in C code.
*/
typedef Oid regproc;
typedef regproc RegProcedure;
typedef uint32 TransactionId;
typedef uint32 LocalTransactionId;
typedef uint32 SubTransactionId;
#define InvalidSubTransactionId ((SubTransactionId) 0)
#define TopSubTransactionId ((SubTransactionId) 1)
/* MultiXactId must be equivalent to TransactionId, to fit in t_xmax */
typedef TransactionId MultiXactId;
typedef uint32 MultiXactOffset;
typedef uint32 CommandId;
#define FirstCommandId ((CommandId) 0)
#define InvalidCommandId (~(CommandId)0)
/*
* Array indexing support
*/
#define MAXDIM 6
typedef struct
{
int indx[MAXDIM];
} IntArray;
/* ----------------
* Variable-length datatypes all share the 'struct varlena' header.
*
* NOTE: for TOASTable types, this is an oversimplification, since the value
* may be compressed or moved out-of-line. However datatype-specific routines
* are mostly content to deal with de-TOASTed values only, and of course
* client-side routines should never see a TOASTed value. But even in a
* de-TOASTed value, beware of touching vl_len_ directly, as its
* representation is no longer convenient. It's recommended that code always
* use macros VARDATA_ANY, VARSIZE_ANY, VARSIZE_ANY_EXHDR, VARDATA, VARSIZE,
* and SET_VARSIZE instead of relying on direct mentions of the struct fields.
* See postgres.h for details of the TOASTed form.
* ----------------
*/
struct varlena
{
char vl_len_[4]; /* Do not touch this field directly! */
char vl_dat[FLEXIBLE_ARRAY_MEMBER]; /* Data content is here */
};
#define VARHDRSZ ((int32) sizeof(int32))
/*
* These widely-used datatypes are just a varlena header and the data bytes.
* There is no terminating null or anything like that --- the data length is
* always VARSIZE_ANY_EXHDR(ptr).
*/
typedef struct varlena bytea;
typedef struct varlena text;
typedef struct varlena BpChar; /* blank-padded char, ie SQL char(n) */
typedef struct varlena VarChar; /* var-length char, ie SQL varchar(n) */
/*
* Specialized array types. These are physically laid out just the same
* as regular arrays (so that the regular array subscripting code works
* with them). They exist as distinct types mostly for historical reasons:
* they have nonstandard I/O behavior which we don't want to change for fear
* of breaking applications that look at the system catalogs. There is also
* an implementation issue for oidvector: it's part of the primary key for
* pg_proc, and we can't use the normal btree array support routines for that
* without circularity.
*/
typedef struct
{
int32 vl_len_; /* these fields must match ArrayType! */
int ndim; /* always 1 for int2vector */
int32 dataoffset; /* always 0 for int2vector */
Oid elemtype;
int dim1;
int lbound1;
int16 values[FLEXIBLE_ARRAY_MEMBER];
} int2vector;
typedef struct
{
int32 vl_len_; /* these fields must match ArrayType! */
int ndim; /* always 1 for oidvector */
int32 dataoffset; /* always 0 for oidvector */
Oid elemtype;
int dim1;
int lbound1;
Oid values[FLEXIBLE_ARRAY_MEMBER];
} oidvector;
/*
* Representation of a Name: effectively just a C string, but null-padded to
* exactly NAMEDATALEN bytes. The use of a struct is historical.
*/
typedef struct nameData
{
char data[NAMEDATALEN];
} NameData;
typedef NameData *Name;
#define NameStr(name) ((name).data)
/* ----------------------------------------------------------------
* Section 4: IsValid macros for system types
* ----------------------------------------------------------------
*/
/*
* BoolIsValid
* True iff bool is valid.
*/
#define BoolIsValid(boolean) ((boolean) == false || (boolean) == true)
/*
* PointerIsValid
* True iff pointer is valid.
*/
#define PointerIsValid(pointer) ((const void*)(pointer) != NULL)
/*
* PointerIsAligned
* True iff pointer is properly aligned to point to the given type.
*/
#define PointerIsAligned(pointer, type) \
(((uintptr_t)(pointer) % (sizeof (type))) == 0)
#define OffsetToPointer(base, offset) \
((void *)((char *) base + offset))
#define OidIsValid(objectId) ((bool) ((objectId) != InvalidOid))
#define RegProcedureIsValid(p) OidIsValid(p)
/* ----------------------------------------------------------------
* Section 5: offsetof, lengthof, alignment
* ----------------------------------------------------------------
*/
/*
* offsetof
* Offset of a structure/union field within that structure/union.
*
* XXX This is supposed to be part of stddef.h, but isn't on
* some systems (like SunOS 4).
*/
#ifndef offsetof
#define offsetof(type, field) ((long) &((type *)0)->field)
#endif /* offsetof */
/*
* lengthof
* Number of elements in an array.
*/
#define lengthof(array) (sizeof (array) / sizeof ((array)[0]))
/* ----------------
* Alignment macros: align a length or address appropriately for a given type.
* The fooALIGN() macros round up to a multiple of the required alignment,
* while the fooALIGN_DOWN() macros round down. The latter are more useful
* for problems like "how many X-sized structures will fit in a page?".
*
* NOTE: TYPEALIGN[_DOWN] will not work if ALIGNVAL is not a power of 2.
* That case seems extremely unlikely to be needed in practice, however.
*
* NOTE: MAXIMUM_ALIGNOF, and hence MAXALIGN(), intentionally exclude any
* larger-than-8-byte types the compiler might have.
* ----------------
*/
#define TYPEALIGN(ALIGNVAL,LEN) \
(((uintptr_t) (LEN) + ((ALIGNVAL) - 1)) & ~((uintptr_t) ((ALIGNVAL) - 1)))
#define SHORTALIGN(LEN) TYPEALIGN(ALIGNOF_SHORT, (LEN))
#define INTALIGN(LEN) TYPEALIGN(ALIGNOF_INT, (LEN))
#define LONGALIGN(LEN) TYPEALIGN(ALIGNOF_LONG, (LEN))
#define DOUBLEALIGN(LEN) TYPEALIGN(ALIGNOF_DOUBLE, (LEN))
#define MAXALIGN(LEN) TYPEALIGN(MAXIMUM_ALIGNOF, (LEN))
/* MAXALIGN covers only built-in types, not buffers */
#define BUFFERALIGN(LEN) TYPEALIGN(ALIGNOF_BUFFER, (LEN))
#define CACHELINEALIGN(LEN) TYPEALIGN(PG_CACHE_LINE_SIZE, (LEN))
#define TYPEALIGN_DOWN(ALIGNVAL,LEN) \
(((uintptr_t) (LEN)) & ~((uintptr_t) ((ALIGNVAL) - 1)))
#define SHORTALIGN_DOWN(LEN) TYPEALIGN_DOWN(ALIGNOF_SHORT, (LEN))
#define INTALIGN_DOWN(LEN) TYPEALIGN_DOWN(ALIGNOF_INT, (LEN))
#define LONGALIGN_DOWN(LEN) TYPEALIGN_DOWN(ALIGNOF_LONG, (LEN))
#define DOUBLEALIGN_DOWN(LEN) TYPEALIGN_DOWN(ALIGNOF_DOUBLE, (LEN))
#define MAXALIGN_DOWN(LEN) TYPEALIGN_DOWN(MAXIMUM_ALIGNOF, (LEN))
#define BUFFERALIGN_DOWN(LEN) TYPEALIGN_DOWN(ALIGNOF_BUFFER, (LEN))
/*
* The above macros will not work with types wider than uintptr_t, like with
* uint64 on 32-bit platforms. That's not problem for the usual use where a
* pointer or a length is aligned, but for the odd case that you need to
* align something (potentially) wider, use TYPEALIGN64.
*/
#define TYPEALIGN64(ALIGNVAL,LEN) \
(((uint64) (LEN) + ((ALIGNVAL) - 1)) & ~((uint64) ((ALIGNVAL) - 1)))
/* we don't currently need wider versions of the other ALIGN macros */
#define MAXALIGN64(LEN) TYPEALIGN64(MAXIMUM_ALIGNOF, (LEN))
/* ----------------------------------------------------------------
* Section 6: assertions
* ----------------------------------------------------------------
*/
/*
* USE_ASSERT_CHECKING, if defined, turns on all the assertions.
* - plai 9/5/90
*
* It should _NOT_ be defined in releases or in benchmark copies
*/
/*
* Assert() can be used in both frontend and backend code. In frontend code it
* just calls the standard assert, if it's available. If use of assertions is
* not configured, it does nothing.
*/
#ifndef USE_ASSERT_CHECKING
#define Assert(condition) ((void)true)
#define AssertMacro(condition) ((void)true)
#define AssertArg(condition) ((void)true)
#define AssertState(condition) ((void)true)
#define AssertPointerAlignment(ptr, bndr) ((void)true)
#define Trap(condition, errorType) ((void)true)
#define TrapMacro(condition, errorType) (true)
#elif defined(FRONTEND)
#include <assert.h>
#define Assert(p) assert(p)
#define AssertMacro(p) ((void) assert(p))
#define AssertArg(condition) assert(condition)
#define AssertState(condition) assert(condition)
#define AssertPointerAlignment(ptr, bndr) ((void)true)
#else /* USE_ASSERT_CHECKING && !FRONTEND */
/*
* Trap
* Generates an exception if the given condition is true.
*/
#define Trap(condition, errorType) \
do { \
if (condition) \
ExceptionalCondition(#condition, (errorType), \
__FILE__, __LINE__); \
} while (0)
/*
* TrapMacro is the same as Trap but it's intended for use in macros:
*
* #define foo(x) (AssertMacro(x != 0), bar(x))
*
* Isn't CPP fun?
*/
#define TrapMacro(condition, errorType) \
((bool) (! (condition) || \
(ExceptionalCondition(#condition, (errorType), \
__FILE__, __LINE__), 0)))
#define Assert(condition) \
do { \
if (!(condition)) \
ExceptionalCondition(#condition, "FailedAssertion", \
__FILE__, __LINE__); \
} while (0)
#define AssertMacro(condition) \
((void) ((condition) || \
(ExceptionalCondition(#condition, "FailedAssertion", \
__FILE__, __LINE__), 0)))
#define AssertArg(condition) \
do { \
if (!(condition)) \
ExceptionalCondition(#condition, "BadArgument", \
__FILE__, __LINE__); \
} while (0)
#define AssertState(condition) \
do { \
if (!(condition)) \
ExceptionalCondition(#condition, "BadState", \
__FILE__, __LINE__); \
} while (0)
/*
* Check that `ptr' is `bndr' aligned.
*/
#define AssertPointerAlignment(ptr, bndr) \
Trap(TYPEALIGN(bndr, (uintptr_t)(ptr)) != (uintptr_t)(ptr), \
"UnalignedPointer")
#endif /* USE_ASSERT_CHECKING && !FRONTEND */
/*
* ExceptionalCondition is compiled into the backend whether or not
* USE_ASSERT_CHECKING is defined, so as to support use of extensions
* that are built with that #define with a backend that isn't. Hence,
* we should declare it as long as !FRONTEND.
*/
#ifndef FRONTEND
extern void ExceptionalCondition(const char *conditionName,
const char *errorType,
const char *fileName, int lineNumber) pg_attribute_noreturn();
#endif
/*
* Macros to support compile-time assertion checks.
*
* If the "condition" (a compile-time-constant expression) evaluates to false,
* throw a compile error using the "errmessage" (a string literal).
*
* gcc 4.6 and up supports _Static_assert(), but there are bizarre syntactic
* placement restrictions. Macros StaticAssertStmt() and StaticAssertExpr()
* make it safe to use as a statement or in an expression, respectively.
* The macro StaticAssertDecl() is suitable for use at file scope (outside of
* any function).
*
* Otherwise we fall back on a kluge that assumes the compiler will complain
* about a negative width for a struct bit-field. This will not include a
* helpful error message, but it beats not getting an error at all.
*/
#ifndef __cplusplus
#ifdef HAVE__STATIC_ASSERT
#define StaticAssertStmt(condition, errmessage) \
do { _Static_assert(condition, errmessage); } while(0)
#define StaticAssertExpr(condition, errmessage) \
((void) ({ StaticAssertStmt(condition, errmessage); true; }))
#define StaticAssertDecl(condition, errmessage) \
_Static_assert(condition, errmessage)
#else /* !HAVE__STATIC_ASSERT */
#define StaticAssertStmt(condition, errmessage) \
((void) sizeof(struct { int static_assert_failure : (condition) ? 1 : -1; }))
#define StaticAssertExpr(condition, errmessage) \
StaticAssertStmt(condition, errmessage)
#define StaticAssertDecl(condition, errmessage) \
extern void static_assert_func(int static_assert_failure[(condition) ? 1 : -1])
#endif /* HAVE__STATIC_ASSERT */
#else /* C++ */
#if defined(__cpp_static_assert) && __cpp_static_assert >= 200410
#define StaticAssertStmt(condition, errmessage) \
static_assert(condition, errmessage)
#define StaticAssertExpr(condition, errmessage) \
({ static_assert(condition, errmessage); })
#define StaticAssertDecl(condition, errmessage) \
static_assert(condition, errmessage)
#else /* !__cpp_static_assert */
#define StaticAssertStmt(condition, errmessage) \
do { struct static_assert_struct { int static_assert_failure : (condition) ? 1 : -1; }; } while(0)
#define StaticAssertExpr(condition, errmessage) \
((void) ({ StaticAssertStmt(condition, errmessage); }))
#define StaticAssertDecl(condition, errmessage) \
extern void static_assert_func(int static_assert_failure[(condition) ? 1 : -1])
#endif /* __cpp_static_assert */
#endif /* C++ */
/*
* Compile-time checks that a variable (or expression) has the specified type.
*
* AssertVariableIsOfType() can be used as a statement.
* AssertVariableIsOfTypeMacro() is intended for use in macros, eg
* #define foo(x) (AssertVariableIsOfTypeMacro(x, int), bar(x))
*
* If we don't have __builtin_types_compatible_p, we can still assert that
* the types have the same size. This is far from ideal (especially on 32-bit
* platforms) but it provides at least some coverage.
*/
#ifdef HAVE__BUILTIN_TYPES_COMPATIBLE_P
#define AssertVariableIsOfType(varname, typename) \
StaticAssertStmt(__builtin_types_compatible_p(__typeof__(varname), typename), \
CppAsString(varname) " does not have type " CppAsString(typename))
#define AssertVariableIsOfTypeMacro(varname, typename) \
(StaticAssertExpr(__builtin_types_compatible_p(__typeof__(varname), typename), \
CppAsString(varname) " does not have type " CppAsString(typename)))
#else /* !HAVE__BUILTIN_TYPES_COMPATIBLE_P */
#define AssertVariableIsOfType(varname, typename) \
StaticAssertStmt(sizeof(varname) == sizeof(typename), \
CppAsString(varname) " does not have type " CppAsString(typename))
#define AssertVariableIsOfTypeMacro(varname, typename) \
(StaticAssertExpr(sizeof(varname) == sizeof(typename), \
CppAsString(varname) " does not have type " CppAsString(typename)))
#endif /* HAVE__BUILTIN_TYPES_COMPATIBLE_P */
/* ----------------------------------------------------------------
* Section 7: widely useful macros
* ----------------------------------------------------------------
*/
/*
* Max
* Return the maximum of two numbers.
*/
#define Max(x, y) ((x) > (y) ? (x) : (y))
/*
* Min
* Return the minimum of two numbers.
*/
#define Min(x, y) ((x) < (y) ? (x) : (y))
/*
* Abs
* Return the absolute value of the argument.
*/
#define Abs(x) ((x) >= 0 ? (x) : -(x))
/*
* StrNCpy
* Like standard library function strncpy(), except that result string
* is guaranteed to be null-terminated --- that is, at most N-1 bytes
* of the source string will be kept.
* Also, the macro returns no result (too hard to do that without
* evaluating the arguments multiple times, which seems worse).
*
* BTW: when you need to copy a non-null-terminated string (like a text
* datum) and add a null, do not do it with StrNCpy(..., len+1). That
* might seem to work, but it fetches one byte more than there is in the
* text object. One fine day you'll have a SIGSEGV because there isn't
* another byte before the end of memory. Don't laugh, we've had real
* live bug reports from real live users over exactly this mistake.
* Do it honestly with "memcpy(dst,src,len); dst[len] = '\0';", instead.
*/
#define StrNCpy(dst,src,len) \
do \
{ \
char * _dst = (dst); \
Size _len = (len); \
\
if (_len > 0) \
{ \
strncpy(_dst, (src), _len); \
_dst[_len-1] = '\0'; \
} \
} while (0)
/* Get a bit mask of the bits set in non-long aligned addresses */
#define LONG_ALIGN_MASK (sizeof(long) - 1)
/*
* MemSet
* Exactly the same as standard library function memset(), but considerably
* faster for zeroing small word-aligned structures (such as parsetree nodes).
* This has to be a macro because the main point is to avoid function-call
* overhead. However, we have also found that the loop is faster than
* native libc memset() on some platforms, even those with assembler
* memset() functions. More research needs to be done, perhaps with
* MEMSET_LOOP_LIMIT tests in configure.
*/
#define MemSet(start, val, len) \
do \
{ \
/* must be void* because we don't know if it is integer aligned yet */ \
void *_vstart = (void *) (start); \
int _val = (val); \
Size _len = (len); \
\
if ((((uintptr_t) _vstart) & LONG_ALIGN_MASK) == 0 && \
(_len & LONG_ALIGN_MASK) == 0 && \
_val == 0 && \
_len <= MEMSET_LOOP_LIMIT && \
/* \
* If MEMSET_LOOP_LIMIT == 0, optimizer should find \
* the whole "if" false at compile time. \
*/ \
MEMSET_LOOP_LIMIT != 0) \
{ \
long *_start = (long *) _vstart; \
long *_stop = (long *) ((char *) _start + _len); \
while (_start < _stop) \
*_start++ = 0; \
} \
else \
memset(_vstart, _val, _len); \
} while (0)
/*
* MemSetAligned is the same as MemSet except it omits the test to see if
* "start" is word-aligned. This is okay to use if the caller knows a-priori
* that the pointer is suitably aligned (typically, because he just got it
* from palloc(), which always delivers a max-aligned pointer).
*/
#define MemSetAligned(start, val, len) \
do \
{ \
long *_start = (long *) (start); \
int _val = (val); \
Size _len = (len); \
\
if ((_len & LONG_ALIGN_MASK) == 0 && \
_val == 0 && \
_len <= MEMSET_LOOP_LIMIT && \
MEMSET_LOOP_LIMIT != 0) \
{ \
long *_stop = (long *) ((char *) _start + _len); \
while (_start < _stop) \
*_start++ = 0; \
} \
else \
memset(_start, _val, _len); \
} while (0)
/*
* MemSetTest/MemSetLoop are a variant version that allow all the tests in
* MemSet to be done at compile time in cases where "val" and "len" are
* constants *and* we know the "start" pointer must be word-aligned.
* If MemSetTest succeeds, then it is okay to use MemSetLoop, otherwise use
* MemSetAligned. Beware of multiple evaluations of the arguments when using
* this approach.
*/
#define MemSetTest(val, len) \
( ((len) & LONG_ALIGN_MASK) == 0 && \
(len) <= MEMSET_LOOP_LIMIT && \
MEMSET_LOOP_LIMIT != 0 && \
(val) == 0 )
#define MemSetLoop(start, val, len) \
do \
{ \
long * _start = (long *) (start); \
long * _stop = (long *) ((char *) _start + (Size) (len)); \
\
while (_start < _stop) \
*_start++ = 0; \
} while (0)
/*
* Macros for range-checking float values before converting to integer.
* We must be careful here that the boundary values are expressed exactly
* in the float domain. PG_INTnn_MIN is an exact power of 2, so it will
* be represented exactly; but PG_INTnn_MAX isn't, and might get rounded
* off, so avoid using that.
* The input must be rounded to an integer beforehand, typically with rint(),
* else we might draw the wrong conclusion about close-to-the-limit values.
* These macros will do the right thing for Inf, but not necessarily for NaN,
* so check isnan(num) first if that's a possibility.
*/
#define FLOAT4_FITS_IN_INT16(num) \
((num) >= (float4) PG_INT16_MIN && (num) < -((float4) PG_INT16_MIN))
#define FLOAT4_FITS_IN_INT32(num) \
((num) >= (float4) PG_INT32_MIN && (num) < -((float4) PG_INT32_MIN))
#define FLOAT4_FITS_IN_INT64(num) \
((num) >= (float4) PG_INT64_MIN && (num) < -((float4) PG_INT64_MIN))
#define FLOAT8_FITS_IN_INT16(num) \
((num) >= (float8) PG_INT16_MIN && (num) < -((float8) PG_INT16_MIN))
#define FLOAT8_FITS_IN_INT32(num) \
((num) >= (float8) PG_INT32_MIN && (num) < -((float8) PG_INT32_MIN))
#define FLOAT8_FITS_IN_INT64(num) \
((num) >= (float8) PG_INT64_MIN && (num) < -((float8) PG_INT64_MIN))
/* ----------------------------------------------------------------
* Section 8: random stuff
* ----------------------------------------------------------------
*/
#ifdef HAVE_STRUCT_SOCKADDR_UN
#define HAVE_UNIX_SOCKETS 1
#endif
/*
* Invert the sign of a qsort-style comparison result, ie, exchange negative
* and positive integer values, being careful not to get the wrong answer
* for INT_MIN. The argument should be an integral variable.
*/
#define INVERT_COMPARE_RESULT(var) \
((var) = ((var) < 0) ? 1 : -(var))
/*
* Use this, not "char buf[BLCKSZ]", to declare a field or local variable
* holding a page buffer, if that page might be accessed as a page and not
* just a string of bytes. Otherwise the variable might be under-aligned,
* causing problems on alignment-picky hardware. (In some places, we use
* this to declare buffers even though we only pass them to read() and
* write(), because copying to/from aligned buffers is usually faster than
* using unaligned buffers.) We include both "double" and "int64" in the
* union to ensure that the compiler knows the value must be MAXALIGN'ed
* (cf. configure's computation of MAXIMUM_ALIGNOF).
*/
typedef union PGAlignedBlock
{
char data[BLCKSZ];
double force_align_d;
int64 force_align_i64;
} PGAlignedBlock;
/* Same, but for an XLOG_BLCKSZ-sized buffer */
typedef union PGAlignedXLogBlock
{
char data[XLOG_BLCKSZ];
double force_align_d;
int64 force_align_i64;
} PGAlignedXLogBlock;
/* msb for char */
#define HIGHBIT (0x80)
#define IS_HIGHBIT_SET(ch) ((unsigned char)(ch) & HIGHBIT)
/*
* Support macros for escaping strings. escape_backslash should be true
* if generating a non-standard-conforming string. Prefixing a string
* with ESCAPE_STRING_SYNTAX guarantees it is non-standard-conforming.
* Beware of multiple evaluation of the "ch" argument!
*/
#define SQL_STR_DOUBLE(ch, escape_backslash) \
((ch) == '\'' || ((ch) == '\\' && (escape_backslash)))
#define ESCAPE_STRING_SYNTAX 'E'
#define STATUS_OK (0)
#define STATUS_ERROR (-1)
#define STATUS_EOF (-2)
#define STATUS_WAITING (2)
/*
* gettext support
*/
#ifndef ENABLE_NLS
/* stuff we'd otherwise get from <libintl.h> */
#define gettext(x) (x)
#define dgettext(d,x) (x)
#define ngettext(s,p,n) ((n) == 1 ? (s) : (p))
#define dngettext(d,s,p,n) ((n) == 1 ? (s) : (p))
#endif
#define _(x) gettext(x)
/*
* Use this to mark string constants as needing translation at some later
* time, rather than immediately. This is useful for cases where you need
* access to the original string and translated string, and for cases where
* immediate translation is not possible, like when initializing global
* variables.
* http://www.gnu.org/software/autoconf/manual/gettext/Special-cases.html
*/
#define gettext_noop(x) (x)
/*
* To better support parallel installations of major PostgreSQL
* versions as well as parallel installations of major library soname
* versions, we mangle the gettext domain name by appending those
* version numbers. The coding rule ought to be that wherever the
* domain name is mentioned as a literal, it must be wrapped into
* PG_TEXTDOMAIN(). The macros below do not work on non-literals; but
* that is somewhat intentional because it avoids having to worry
* about multiple states of premangling and postmangling as the values
* are being passed around.
*
* Make sure this matches the installation rules in nls-global.mk.
*/
#ifdef SO_MAJOR_VERSION
#define PG_TEXTDOMAIN(domain) (domain CppAsString2(SO_MAJOR_VERSION) "-" PG_MAJORVERSION)
#else
#define PG_TEXTDOMAIN(domain) (domain "-" PG_MAJORVERSION)
#endif
/*
* Macro that allows to cast constness and volatile away from an expression, but doesn't
* allow changing the underlying type. Enforcement of the latter
* currently only works for gcc like compilers.
*
* Please note IT IS NOT SAFE to cast constness away if the result will ever
* be modified (it would be undefined behaviour). Doing so anyway can cause
* compiler misoptimizations or runtime crashes (modifying readonly memory).
* It is only safe to use when the result will not be modified, but API
* design or language restrictions prevent you from declaring that
* (e.g. because a function returns both const and non-const variables).
*
* Note that this only works in function scope, not for global variables (it'd
* be nice, but not trivial, to improve that).
*/
#if defined(HAVE__BUILTIN_TYPES_COMPATIBLE_P)
#define unconstify(underlying_type, expr) \
(StaticAssertExpr(__builtin_types_compatible_p(__typeof(expr), const underlying_type), \
"wrong cast"), \
(underlying_type) (expr))
#define unvolatize(underlying_type, expr) \
(StaticAssertExpr(__builtin_types_compatible_p(__typeof(expr), volatile underlying_type), \
"wrong cast"), \
(underlying_type) (expr))
#else
#define unconstify(underlying_type, expr) \
((underlying_type) (expr))
#define unvolatize(underlying_type, expr) \
((underlying_type) (expr))
#endif
/* ----------------------------------------------------------------
* Section 9: system-specific hacks
*
* This should be limited to things that absolutely have to be
* included in every source file. The port-specific header file
* is usually a better place for this sort of thing.
* ----------------------------------------------------------------
*/
/*
* NOTE: this is also used for opening text files.
* WIN32 treats Control-Z as EOF in files opened in text mode.
* Therefore, we open files in binary mode on Win32 so we can read
* literal control-Z. The other affect is that we see CRLF, but
* that is OK because we can already handle those cleanly.
*/
#if defined(WIN32) || defined(__CYGWIN__)
#define PG_BINARY O_BINARY
#define PG_BINARY_A "ab"
#define PG_BINARY_R "rb"
#define PG_BINARY_W "wb"
#else
#define PG_BINARY 0
#define PG_BINARY_A "a"
#define PG_BINARY_R "r"
#define PG_BINARY_W "w"
#endif
/*
* Provide prototypes for routines not present in a particular machine's
* standard C library.
*/
#if defined(HAVE_FDATASYNC) && !HAVE_DECL_FDATASYNC
extern int fdatasync(int fildes);
#endif
/* Older platforms may provide strto[u]ll functionality under other names */
#if !defined(HAVE_STRTOLL) && defined(HAVE___STRTOLL)
#define strtoll __strtoll
#define HAVE_STRTOLL 1
#endif
#if !defined(HAVE_STRTOLL) && defined(HAVE_STRTOQ)
#define strtoll strtoq
#define HAVE_STRTOLL 1
#endif
#if !defined(HAVE_STRTOULL) && defined(HAVE___STRTOULL)
#define strtoull __strtoull
#define HAVE_STRTOULL 1
#endif
#if !defined(HAVE_STRTOULL) && defined(HAVE_STRTOUQ)
#define strtoull strtouq
#define HAVE_STRTOULL 1
#endif
#if defined(HAVE_STRTOLL) && !HAVE_DECL_STRTOLL
extern long long strtoll(const char *str, char **endptr, int base);
#endif
#if defined(HAVE_STRTOULL) && !HAVE_DECL_STRTOULL
extern unsigned long long strtoull(const char *str, char **endptr, int base);
#endif
/* no special DLL markers on most ports */
#ifndef PGDLLIMPORT
#define PGDLLIMPORT
#endif
#ifndef PGDLLEXPORT
#define PGDLLEXPORT
#endif
/*
* The following is used as the arg list for signal handlers. Any ports
* that take something other than an int argument should override this in
* their pg_config_os.h file. Note that variable names are required
* because it is used in both the prototypes as well as the definitions.
* Note also the long name. We expect that this won't collide with
* other names causing compiler warnings.
*/
#ifndef SIGNAL_ARGS
#define SIGNAL_ARGS int postgres_signal_arg
#endif
/*
* When there is no sigsetjmp, its functionality is provided by plain
* setjmp. Incidentally, nothing provides setjmp's functionality in
* that case. We now support the case only on Windows.
*/
#ifdef WIN32
#define sigjmp_buf jmp_buf
#define sigsetjmp(x,y) setjmp(x)
#define siglongjmp longjmp
#endif
/* EXEC_BACKEND defines */
#ifdef EXEC_BACKEND
#define NON_EXEC_STATIC
#else
#define NON_EXEC_STATIC static
#endif
/* /port compatibility functions */
#include "port.h"
#endif /* C_H */
internal/pqexpbuffer.h 0000644 00000014342 15051110356 0011061 0 ustar 00 /*-------------------------------------------------------------------------
*
* pqexpbuffer.h
* Declarations/definitions for "PQExpBuffer" functions.
*
* PQExpBuffer provides an indefinitely-extensible string data type.
* It can be used to buffer either ordinary C strings (null-terminated text)
* or arbitrary binary data. All storage is allocated with malloc().
*
* This module is essentially the same as the backend's StringInfo data type,
* but it is intended for use in frontend libpq and client applications.
* Thus, it does not rely on palloc() nor elog().
*
* It does rely on vsnprintf(); if configure finds that libc doesn't provide
* a usable vsnprintf(), then a copy of our own implementation of it will
* be linked into libpq.
*
* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/interfaces/libpq/pqexpbuffer.h
*
*-------------------------------------------------------------------------
*/
#ifndef PQEXPBUFFER_H
#define PQEXPBUFFER_H
/*-------------------------
* PQExpBufferData holds information about an extensible string.
* data is the current buffer for the string (allocated with malloc).
* len is the current string length. There is guaranteed to be
* a terminating '\0' at data[len], although this is not very
* useful when the string holds binary data rather than text.
* maxlen is the allocated size in bytes of 'data', i.e. the maximum
* string size (including the terminating '\0' char) that we can
* currently store in 'data' without having to reallocate
* more space. We must always have maxlen > len.
*
* An exception occurs if we failed to allocate enough memory for the string
* buffer. In that case data points to a statically allocated empty string,
* and len = maxlen = 0.
*-------------------------
*/
typedef struct PQExpBufferData
{
char *data;
size_t len;
size_t maxlen;
} PQExpBufferData;
typedef PQExpBufferData *PQExpBuffer;
/*------------------------
* Test for a broken (out of memory) PQExpBuffer.
* When a buffer is "broken", all operations except resetting or deleting it
* are no-ops.
*------------------------
*/
#define PQExpBufferBroken(str) \
((str) == NULL || (str)->maxlen == 0)
/*------------------------
* Same, but for use when using a static or local PQExpBufferData struct.
* For that, a null-pointer test is useless and may draw compiler warnings.
*------------------------
*/
#define PQExpBufferDataBroken(buf) \
((buf).maxlen == 0)
/*------------------------
* Initial size of the data buffer in a PQExpBuffer.
* NB: this must be large enough to hold error messages that might
* be returned by PQrequestCancel().
*------------------------
*/
#define INITIAL_EXPBUFFER_SIZE 256
/*------------------------
* There are two ways to create a PQExpBuffer object initially:
*
* PQExpBuffer stringptr = createPQExpBuffer();
* Both the PQExpBufferData and the data buffer are malloc'd.
*
* PQExpBufferData string;
* initPQExpBuffer(&string);
* The data buffer is malloc'd but the PQExpBufferData is presupplied.
* This is appropriate if the PQExpBufferData is a field of another
* struct.
*-------------------------
*/
/*------------------------
* createPQExpBuffer
* Create an empty 'PQExpBufferData' & return a pointer to it.
*/
extern PQExpBuffer createPQExpBuffer(void);
/*------------------------
* initPQExpBuffer
* Initialize a PQExpBufferData struct (with previously undefined contents)
* to describe an empty string.
*/
extern void initPQExpBuffer(PQExpBuffer str);
/*------------------------
* To destroy a PQExpBuffer, use either:
*
* destroyPQExpBuffer(str);
* free()s both the data buffer and the PQExpBufferData.
* This is the inverse of createPQExpBuffer().
*
* termPQExpBuffer(str)
* free()s the data buffer but not the PQExpBufferData itself.
* This is the inverse of initPQExpBuffer().
*
* NOTE: some routines build up a string using PQExpBuffer, and then
* release the PQExpBufferData but return the data string itself to their
* caller. At that point the data string looks like a plain malloc'd
* string.
*/
extern void destroyPQExpBuffer(PQExpBuffer str);
extern void termPQExpBuffer(PQExpBuffer str);
/*------------------------
* resetPQExpBuffer
* Reset a PQExpBuffer to empty
*
* Note: if possible, a "broken" PQExpBuffer is returned to normal.
*/
extern void resetPQExpBuffer(PQExpBuffer str);
/*------------------------
* enlargePQExpBuffer
* Make sure there is enough space for 'needed' more bytes in the buffer
* ('needed' does not include the terminating null).
*
* Returns 1 if OK, 0 if failed to enlarge buffer. (In the latter case
* the buffer is left in "broken" state.)
*/
extern int enlargePQExpBuffer(PQExpBuffer str, size_t needed);
/*------------------------
* printfPQExpBuffer
* Format text data under the control of fmt (an sprintf-like format string)
* and insert it into str. More space is allocated to str if necessary.
* This is a convenience routine that does the same thing as
* resetPQExpBuffer() followed by appendPQExpBuffer().
*/
extern void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...) pg_attribute_printf(2, 3);
/*------------------------
* appendPQExpBuffer
* Format text data under the control of fmt (an sprintf-like format string)
* and append it to whatever is already in str. More space is allocated
* to str if necessary. This is sort of like a combination of sprintf and
* strcat.
*/
extern void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...) pg_attribute_printf(2, 3);
/*------------------------
* appendPQExpBufferStr
* Append the given string to a PQExpBuffer, allocating more space
* if necessary.
*/
extern void appendPQExpBufferStr(PQExpBuffer str, const char *data);
/*------------------------
* appendPQExpBufferChar
* Append a single byte to str.
* Like appendPQExpBuffer(str, "%c", ch) but much faster.
*/
extern void appendPQExpBufferChar(PQExpBuffer str, char ch);
/*------------------------
* appendBinaryPQExpBuffer
* Append arbitrary binary data to a PQExpBuffer, allocating more space
* if necessary.
*/
extern void appendBinaryPQExpBuffer(PQExpBuffer str,
const char *data, size_t datalen);
#endif /* PQEXPBUFFER_H */
internal/libpq-int.h 0000644 00000072124 15051110356 0010433 0 ustar 00 /*-------------------------------------------------------------------------
*
* libpq-int.h
* This file contains internal definitions meant to be used only by
* the frontend libpq library, not by applications that call it.
*
* An application can include this file if it wants to bypass the
* official API defined by libpq-fe.h, but code that does so is much
* more likely to break across PostgreSQL releases than code that uses
* only the official API.
*
* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/interfaces/libpq/libpq-int.h
*
*-------------------------------------------------------------------------
*/
#ifndef LIBPQ_INT_H
#define LIBPQ_INT_H
/* We assume libpq-fe.h has already been included. */
#include "libpq-events.h"
#include <time.h>
#ifndef WIN32
#include <sys/time.h>
#endif
#ifdef ENABLE_THREAD_SAFETY
#ifdef WIN32
#include "pthread-win32.h"
#else
#include <pthread.h>
#endif
#include <signal.h>
#endif
/* include stuff common to fe and be */
#include "getaddrinfo.h"
#include "libpq/pqcomm.h"
/* include stuff found in fe only */
#include "pqexpbuffer.h"
#ifdef ENABLE_GSS
#if defined(HAVE_GSSAPI_H)
#include <gssapi.h>
#else
#include <gssapi/gssapi.h>
#endif
#endif
#ifdef ENABLE_SSPI
#define SECURITY_WIN32
#if defined(WIN32) && !defined(_MSC_VER)
#include <ntsecapi.h>
#endif
#include <security.h>
#undef SECURITY_WIN32
#ifndef ENABLE_GSS
/*
* Define a fake structure compatible with GSSAPI on Unix.
*/
typedef struct
{
void *value;
int length;
} gss_buffer_desc;
#endif
#endif /* ENABLE_SSPI */
#ifdef USE_OPENSSL
#include <openssl/ssl.h>
#include <openssl/err.h>
#ifndef OPENSSL_NO_ENGINE
#define USE_SSL_ENGINE
#endif
#endif /* USE_OPENSSL */
/*
* POSTGRES backend dependent Constants.
*/
#define CMDSTATUS_LEN 64 /* should match COMPLETION_TAG_BUFSIZE */
/*
* PGresult and the subsidiary types PGresAttDesc, PGresAttValue
* represent the result of a query (or more precisely, of a single SQL
* command --- a query string given to PQexec can contain multiple commands).
* Note we assume that a single command can return at most one tuple group,
* hence there is no need for multiple descriptor sets.
*/
/* Subsidiary-storage management structure for PGresult.
* See space management routines in fe-exec.c for details.
* Note that space[k] refers to the k'th byte starting from the physical
* head of the block --- it's a union, not a struct!
*/
typedef union pgresult_data PGresult_data;
union pgresult_data
{
PGresult_data *next; /* link to next block, or NULL */
char space[1]; /* dummy for accessing block as bytes */
};
/* Data about a single parameter of a prepared statement */
typedef struct pgresParamDesc
{
Oid typid; /* type id */
} PGresParamDesc;
/*
* Data for a single attribute of a single tuple
*
* We use char* for Attribute values.
*
* The value pointer always points to a null-terminated area; we add a
* null (zero) byte after whatever the backend sends us. This is only
* particularly useful for text values ... with a binary value, the
* value might have embedded nulls, so the application can't use C string
* operators on it. But we add a null anyway for consistency.
* Note that the value itself does not contain a length word.
*
* A NULL attribute is a special case in two ways: its len field is NULL_LEN
* and its value field points to null_field in the owning PGresult. All the
* NULL attributes in a query result point to the same place (there's no need
* to store a null string separately for each one).
*/
#define NULL_LEN (-1) /* pg_result len for NULL value */
typedef struct pgresAttValue
{
int len; /* length in bytes of the value */
char *value; /* actual value, plus terminating zero byte */
} PGresAttValue;
/* Typedef for message-field list entries */
typedef struct pgMessageField
{
struct pgMessageField *next; /* list link */
char code; /* field code */
char contents[FLEXIBLE_ARRAY_MEMBER]; /* value, nul-terminated */
} PGMessageField;
/* Fields needed for notice handling */
typedef struct
{
PQnoticeReceiver noticeRec; /* notice message receiver */
void *noticeRecArg;
PQnoticeProcessor noticeProc; /* notice message processor */
void *noticeProcArg;
} PGNoticeHooks;
typedef struct PGEvent
{
PGEventProc proc; /* the function to call on events */
char *name; /* used only for error messages */
void *passThrough; /* pointer supplied at registration time */
void *data; /* optional state (instance) data */
bool resultInitialized; /* T if RESULTCREATE/COPY succeeded */
} PGEvent;
struct pg_result
{
int ntups;
int numAttributes;
PGresAttDesc *attDescs;
PGresAttValue **tuples; /* each PGresult tuple is an array of
* PGresAttValue's */
int tupArrSize; /* allocated size of tuples array */
int numParameters;
PGresParamDesc *paramDescs;
ExecStatusType resultStatus;
char cmdStatus[CMDSTATUS_LEN]; /* cmd status from the query */
int binary; /* binary tuple values if binary == 1,
* otherwise text */
/*
* These fields are copied from the originating PGconn, so that operations
* on the PGresult don't have to reference the PGconn.
*/
PGNoticeHooks noticeHooks;
PGEvent *events;
int nEvents;
int client_encoding; /* encoding id */
/*
* Error information (all NULL if not an error result). errMsg is the
* "overall" error message returned by PQresultErrorMessage. If we have
* per-field info then it is stored in a linked list.
*/
char *errMsg; /* error message, or NULL if no error */
PGMessageField *errFields; /* message broken into fields */
char *errQuery; /* text of triggering query, if available */
/* All NULL attributes in the query result point to this null string */
char null_field[1];
/*
* Space management information. Note that attDescs and error stuff, if
* not null, point into allocated blocks. But tuples points to a
* separately malloc'd block, so that we can realloc it.
*/
PGresult_data *curBlock; /* most recently allocated block */
int curOffset; /* start offset of free space in block */
int spaceLeft; /* number of free bytes remaining in block */
size_t memorySize; /* total space allocated for this PGresult */
};
/* PGAsyncStatusType defines the state of the query-execution state machine */
typedef enum
{
PGASYNC_IDLE, /* nothing's happening, dude */
PGASYNC_BUSY, /* query in progress */
PGASYNC_READY, /* result ready for PQgetResult */
PGASYNC_COPY_IN, /* Copy In data transfer in progress */
PGASYNC_COPY_OUT, /* Copy Out data transfer in progress */
PGASYNC_COPY_BOTH /* Copy In/Out data transfer in progress */
} PGAsyncStatusType;
/* PGQueryClass tracks which query protocol we are now executing */
typedef enum
{
PGQUERY_SIMPLE, /* simple Query protocol (PQexec) */
PGQUERY_EXTENDED, /* full Extended protocol (PQexecParams) */
PGQUERY_PREPARE, /* Parse only (PQprepare) */
PGQUERY_DESCRIBE /* Describe Statement or Portal */
} PGQueryClass;
/* PGSetenvStatusType defines the state of the pqSetenv state machine */
/* (this is used only for 2.0-protocol connections) */
typedef enum
{
SETENV_STATE_CLIENT_ENCODING_SEND, /* About to send an Environment Option */
SETENV_STATE_CLIENT_ENCODING_WAIT, /* Waiting for above send to complete */
SETENV_STATE_OPTION_SEND, /* About to send an Environment Option */
SETENV_STATE_OPTION_WAIT, /* Waiting for above send to complete */
SETENV_STATE_QUERY1_SEND, /* About to send a status query */
SETENV_STATE_QUERY1_WAIT, /* Waiting for query to complete */
SETENV_STATE_QUERY2_SEND, /* About to send a status query */
SETENV_STATE_QUERY2_WAIT, /* Waiting for query to complete */
SETENV_STATE_IDLE
} PGSetenvStatusType;
/* Typedef for the EnvironmentOptions[] array */
typedef struct PQEnvironmentOption
{
const char *envName, /* name of an environment variable */
*pgName; /* name of corresponding SET variable */
} PQEnvironmentOption;
/* Typedef for parameter-status list entries */
typedef struct pgParameterStatus
{
struct pgParameterStatus *next; /* list link */
char *name; /* parameter name */
char *value; /* parameter value */
/* Note: name and value are stored in same malloc block as struct is */
} pgParameterStatus;
/* large-object-access data ... allocated only if large-object code is used. */
typedef struct pgLobjfuncs
{
Oid fn_lo_open; /* OID of backend function lo_open */
Oid fn_lo_close; /* OID of backend function lo_close */
Oid fn_lo_creat; /* OID of backend function lo_creat */
Oid fn_lo_create; /* OID of backend function lo_create */
Oid fn_lo_unlink; /* OID of backend function lo_unlink */
Oid fn_lo_lseek; /* OID of backend function lo_lseek */
Oid fn_lo_lseek64; /* OID of backend function lo_lseek64 */
Oid fn_lo_tell; /* OID of backend function lo_tell */
Oid fn_lo_tell64; /* OID of backend function lo_tell64 */
Oid fn_lo_truncate; /* OID of backend function lo_truncate */
Oid fn_lo_truncate64; /* OID of function lo_truncate64 */
Oid fn_lo_read; /* OID of backend function LOread */
Oid fn_lo_write; /* OID of backend function LOwrite */
} PGlobjfuncs;
/* PGdataValue represents a data field value being passed to a row processor.
* It could be either text or binary data; text data is not zero-terminated.
* A SQL NULL is represented by len < 0; then value is still valid but there
* are no data bytes there.
*/
typedef struct pgDataValue
{
int len; /* data length in bytes, or <0 if NULL */
const char *value; /* data value, without zero-termination */
} PGdataValue;
/* Host address type enum for struct pg_conn_host */
typedef enum pg_conn_host_type
{
CHT_HOST_NAME,
CHT_HOST_ADDRESS,
CHT_UNIX_SOCKET
} pg_conn_host_type;
/*
* pg_conn_host stores all information about each of possibly several hosts
* mentioned in the connection string. Most fields are derived by splitting
* the relevant connection parameter (e.g., pghost) at commas.
*/
typedef struct pg_conn_host
{
pg_conn_host_type type; /* type of host address */
char *host; /* host name or socket path */
char *hostaddr; /* host numeric IP address */
char *port; /* port number (always provided) */
char *password; /* password for this host, read from the
* password file; NULL if not sought or not
* found in password file. */
} pg_conn_host;
/*
* PGconn stores all the state data associated with a single connection
* to a backend.
*/
struct pg_conn
{
/* Saved values of connection options */
char *pghost; /* the machine on which the server is running,
* or a path to a UNIX-domain socket, or a
* comma-separated list of machines and/or
* paths; if NULL, use DEFAULT_PGSOCKET_DIR */
char *pghostaddr; /* the numeric IP address of the machine on
* which the server is running, or a
* comma-separated list of same. Takes
* precedence over pghost. */
char *pgport; /* the server's communication port number, or
* a comma-separated list of ports */
char *pgtty; /* tty on which the backend messages is
* displayed (OBSOLETE, NOT USED) */
char *connect_timeout; /* connection timeout (numeric string) */
char *pgtcp_user_timeout; /* tcp user timeout (numeric string) */
char *client_encoding_initial; /* encoding to use */
char *pgoptions; /* options to start the backend with */
char *appname; /* application name */
char *fbappname; /* fallback application name */
char *dbName; /* database name */
char *replication; /* connect as the replication standby? */
char *pguser; /* Postgres username and password, if any */
char *pgpass;
char *pgpassfile; /* path to a file containing password(s) */
char *channel_binding; /* channel binding mode
* (require,prefer,disable) */
char *keepalives; /* use TCP keepalives? */
char *keepalives_idle; /* time between TCP keepalives */
char *keepalives_interval; /* time between TCP keepalive
* retransmits */
char *keepalives_count; /* maximum number of TCP keepalive
* retransmits */
char *sslmode; /* SSL mode (require,prefer,allow,disable) */
char *sslcompression; /* SSL compression (0 or 1) */
char *sslkey; /* client key filename */
char *sslcert; /* client certificate filename */
char *sslpassword; /* client key file password */
char *sslrootcert; /* root certificate filename */
char *sslcrl; /* certificate revocation list filename */
char *requirepeer; /* required peer credentials for local sockets */
char *gssencmode; /* GSS mode (require,prefer,disable) */
char *krbsrvname; /* Kerberos service name */
char *gsslib; /* What GSS library to use ("gssapi" or
* "sspi") */
char *ssl_min_protocol_version; /* minimum TLS protocol version */
char *ssl_max_protocol_version; /* maximum TLS protocol version */
/* Type of connection to make. Possible values: any, read-write. */
char *target_session_attrs;
/* Optional file to write trace info to */
FILE *Pfdebug;
/* Callback procedures for notice message processing */
PGNoticeHooks noticeHooks;
/* Event procs registered via PQregisterEventProc */
PGEvent *events; /* expandable array of event data */
int nEvents; /* number of active events */
int eventArraySize; /* allocated array size */
/* Status indicators */
ConnStatusType status;
PGAsyncStatusType asyncStatus;
PGTransactionStatusType xactStatus; /* never changes to ACTIVE */
PGQueryClass queryclass;
char *last_query; /* last SQL command, or NULL if unknown */
char last_sqlstate[6]; /* last reported SQLSTATE */
bool options_valid; /* true if OK to attempt connection */
bool nonblocking; /* whether this connection is using nonblock
* sending semantics */
bool singleRowMode; /* return current query result row-by-row? */
char copy_is_binary; /* 1 = copy binary, 0 = copy text */
int copy_already_done; /* # bytes already returned in COPY OUT */
PGnotify *notifyHead; /* oldest unreported Notify msg */
PGnotify *notifyTail; /* newest unreported Notify msg */
/* Support for multiple hosts in connection string */
int nconnhost; /* # of hosts named in conn string */
int whichhost; /* host we're currently trying/connected to */
pg_conn_host *connhost; /* details about each named host */
char *connip; /* IP address for current network connection */
/* Connection data */
pgsocket sock; /* FD for socket, PGINVALID_SOCKET if
* unconnected */
SockAddr laddr; /* Local address */
SockAddr raddr; /* Remote address */
ProtocolVersion pversion; /* FE/BE protocol version in use */
int sversion; /* server version, e.g. 70401 for 7.4.1 */
bool auth_req_received; /* true if any type of auth req received */
bool password_needed; /* true if server demanded a password */
bool sigpipe_so; /* have we masked SIGPIPE via SO_NOSIGPIPE? */
bool sigpipe_flag; /* can we mask SIGPIPE via MSG_NOSIGNAL? */
bool write_failed; /* have we had a write failure on sock? */
char *write_err_msg; /* write error message, or NULL if OOM */
/* Transient state needed while establishing connection */
bool try_next_addr; /* time to advance to next address/host? */
bool try_next_host; /* time to advance to next connhost[]? */
struct addrinfo *addrlist; /* list of addresses for current connhost */
struct addrinfo *addr_cur; /* the one currently being tried */
int addrlist_family; /* needed to know how to free addrlist */
PGSetenvStatusType setenv_state; /* for 2.0 protocol only */
const PQEnvironmentOption *next_eo;
bool send_appname; /* okay to send application_name? */
/* Miscellaneous stuff */
int be_pid; /* PID of backend --- needed for cancels */
int be_key; /* key of backend --- needed for cancels */
pgParameterStatus *pstatus; /* ParameterStatus data */
int client_encoding; /* encoding id */
bool std_strings; /* standard_conforming_strings */
PGVerbosity verbosity; /* error/notice message verbosity */
PGContextVisibility show_context; /* whether to show CONTEXT field */
PGlobjfuncs *lobjfuncs; /* private state for large-object access fns */
/* Buffer for data received from backend and not yet processed */
char *inBuffer; /* currently allocated buffer */
int inBufSize; /* allocated size of buffer */
int inStart; /* offset to first unconsumed data in buffer */
int inCursor; /* next byte to tentatively consume */
int inEnd; /* offset to first position after avail data */
/* Buffer for data not yet sent to backend */
char *outBuffer; /* currently allocated buffer */
int outBufSize; /* allocated size of buffer */
int outCount; /* number of chars waiting in buffer */
/* State for constructing messages in outBuffer */
int outMsgStart; /* offset to msg start (length word); if -1,
* msg has no length word */
int outMsgEnd; /* offset to msg end (so far) */
/* Row processor interface workspace */
PGdataValue *rowBuf; /* array for passing values to rowProcessor */
int rowBufLen; /* number of entries allocated in rowBuf */
/* Status for asynchronous result construction */
PGresult *result; /* result being constructed */
PGresult *next_result; /* next result (used in single-row mode) */
/* Assorted state for SASL, SSL, GSS, etc */
void *sasl_state;
/* SSL structures */
bool ssl_in_use;
#ifdef USE_SSL
bool allow_ssl_try; /* Allowed to try SSL negotiation */
bool wait_ssl_try; /* Delay SSL negotiation until after
* attempting normal connection */
#ifdef USE_OPENSSL
SSL *ssl; /* SSL status, if have SSL connection */
X509 *peer; /* X509 cert of server */
#ifdef USE_SSL_ENGINE
ENGINE *engine; /* SSL engine, if any */
#else
void *engine; /* dummy field to keep struct the same if
* OpenSSL version changes */
#endif
#endif /* USE_OPENSSL */
#endif /* USE_SSL */
#ifdef ENABLE_GSS
gss_ctx_id_t gctx; /* GSS context */
gss_name_t gtarg_nam; /* GSS target name */
/* The following are encryption-only */
bool try_gss; /* GSS attempting permitted */
bool gssenc; /* GSS encryption is usable */
gss_cred_id_t gcred; /* GSS credential temp storage. */
/* GSS encryption I/O state --- see fe-secure-gssapi.c */
char *gss_SendBuffer; /* Encrypted data waiting to be sent */
int gss_SendLength; /* End of data available in gss_SendBuffer */
int gss_SendNext; /* Next index to send a byte from
* gss_SendBuffer */
int gss_SendConsumed; /* Number of source bytes encrypted but
* not yet reported as sent */
char *gss_RecvBuffer; /* Received, encrypted data */
int gss_RecvLength; /* End of data available in gss_RecvBuffer */
char *gss_ResultBuffer; /* Decryption of data in gss_RecvBuffer */
int gss_ResultLength; /* End of data available in
* gss_ResultBuffer */
int gss_ResultNext; /* Next index to read a byte from
* gss_ResultBuffer */
uint32 gss_MaxPktSize; /* Maximum size we can encrypt and fit the
* results into our output buffer */
#endif
#ifdef ENABLE_SSPI
CredHandle *sspicred; /* SSPI credentials handle */
CtxtHandle *sspictx; /* SSPI context */
char *sspitarget; /* SSPI target name */
int usesspi; /* Indicate if SSPI is in use on the
* connection */
#endif
/* Buffer for current error message */
PQExpBufferData errorMessage; /* expansible string */
/* Buffer for receiving various parts of messages */
PQExpBufferData workBuffer; /* expansible string */
};
/* PGcancel stores all data necessary to cancel a connection. A copy of this
* data is required to safely cancel a connection running on a different
* thread.
*/
struct pg_cancel
{
SockAddr raddr; /* Remote address */
int be_pid; /* PID of backend --- needed for cancels */
int be_key; /* key of backend --- needed for cancels */
};
/* String descriptions of the ExecStatusTypes.
* direct use of this array is deprecated; call PQresStatus() instead.
*/
extern char *const pgresStatus[];
#ifdef USE_SSL
#ifndef WIN32
#define USER_CERT_FILE ".postgresql/postgresql.crt"
#define USER_KEY_FILE ".postgresql/postgresql.key"
#define ROOT_CERT_FILE ".postgresql/root.crt"
#define ROOT_CRL_FILE ".postgresql/root.crl"
#else
/* On Windows, the "home" directory is already PostgreSQL-specific */
#define USER_CERT_FILE "postgresql.crt"
#define USER_KEY_FILE "postgresql.key"
#define ROOT_CERT_FILE "root.crt"
#define ROOT_CRL_FILE "root.crl"
#endif
#endif /* USE_SSL */
/* ----------------
* Internal functions of libpq
* Functions declared here need to be visible across files of libpq,
* but are not intended to be called by applications. We use the
* convention "pqXXX" for internal functions, vs. the "PQxxx" names
* used for application-visible routines.
* ----------------
*/
/* === in fe-connect.c === */
extern void pqDropConnection(PGconn *conn, bool flushInput);
extern int pqPacketSend(PGconn *conn, char pack_type,
const void *buf, size_t buf_len);
extern bool pqGetHomeDirectory(char *buf, int bufsize);
#ifdef ENABLE_THREAD_SAFETY
extern pgthreadlock_t pg_g_threadlock;
#define PGTHREAD_ERROR(msg) \
do { \
fprintf(stderr, "%s\n", msg); \
abort(); \
} while (0)
#define pglock_thread() pg_g_threadlock(true)
#define pgunlock_thread() pg_g_threadlock(false)
#else
#define pglock_thread() ((void) 0)
#define pgunlock_thread() ((void) 0)
#endif
/* === in fe-exec.c === */
extern void pqSetResultError(PGresult *res, const char *msg);
extern void pqCatenateResultError(PGresult *res, const char *msg);
extern void *pqResultAlloc(PGresult *res, size_t nBytes, bool isBinary);
extern char *pqResultStrdup(PGresult *res, const char *str);
extern void pqClearAsyncResult(PGconn *conn);
extern void pqSaveErrorResult(PGconn *conn);
extern PGresult *pqPrepareAsyncResult(PGconn *conn);
extern void pqInternalNotice(const PGNoticeHooks *hooks, const char *fmt,...) pg_attribute_printf(2, 3);
extern void pqSaveMessageField(PGresult *res, char code,
const char *value);
extern void pqSaveParameterStatus(PGconn *conn, const char *name,
const char *value);
extern int pqRowProcessor(PGconn *conn, const char **errmsgp);
/* === in fe-protocol2.c === */
extern PostgresPollingStatusType pqSetenvPoll(PGconn *conn);
extern char *pqBuildStartupPacket2(PGconn *conn, int *packetlen,
const PQEnvironmentOption *options);
extern void pqParseInput2(PGconn *conn);
extern int pqGetCopyData2(PGconn *conn, char **buffer, int async);
extern int pqGetline2(PGconn *conn, char *s, int maxlen);
extern int pqGetlineAsync2(PGconn *conn, char *buffer, int bufsize);
extern int pqEndcopy2(PGconn *conn);
extern PGresult *pqFunctionCall2(PGconn *conn, Oid fnid,
int *result_buf, int *actual_result_len,
int result_is_int,
const PQArgBlock *args, int nargs);
/* === in fe-protocol3.c === */
extern char *pqBuildStartupPacket3(PGconn *conn, int *packetlen,
const PQEnvironmentOption *options);
extern void pqParseInput3(PGconn *conn);
extern int pqGetErrorNotice3(PGconn *conn, bool isError);
extern void pqBuildErrorMessage3(PQExpBuffer msg, const PGresult *res,
PGVerbosity verbosity, PGContextVisibility show_context);
extern int pqGetCopyData3(PGconn *conn, char **buffer, int async);
extern int pqGetline3(PGconn *conn, char *s, int maxlen);
extern int pqGetlineAsync3(PGconn *conn, char *buffer, int bufsize);
extern int pqEndcopy3(PGconn *conn);
extern PGresult *pqFunctionCall3(PGconn *conn, Oid fnid,
int *result_buf, int *actual_result_len,
int result_is_int,
const PQArgBlock *args, int nargs);
/* === in fe-misc.c === */
/*
* "Get" and "Put" routines return 0 if successful, EOF if not. Note that for
* Get, EOF merely means the buffer is exhausted, not that there is
* necessarily any error.
*/
extern int pqCheckOutBufferSpace(size_t bytes_needed, PGconn *conn);
extern int pqCheckInBufferSpace(size_t bytes_needed, PGconn *conn);
extern int pqGetc(char *result, PGconn *conn);
extern int pqPutc(char c, PGconn *conn);
extern int pqGets(PQExpBuffer buf, PGconn *conn);
extern int pqGets_append(PQExpBuffer buf, PGconn *conn);
extern int pqPuts(const char *s, PGconn *conn);
extern int pqGetnchar(char *s, size_t len, PGconn *conn);
extern int pqSkipnchar(size_t len, PGconn *conn);
extern int pqPutnchar(const char *s, size_t len, PGconn *conn);
extern int pqGetInt(int *result, size_t bytes, PGconn *conn);
extern int pqPutInt(int value, size_t bytes, PGconn *conn);
extern int pqPutMsgStart(char msg_type, bool force_len, PGconn *conn);
extern int pqPutMsgEnd(PGconn *conn);
extern int pqReadData(PGconn *conn);
extern int pqFlush(PGconn *conn);
extern int pqWait(int forRead, int forWrite, PGconn *conn);
extern int pqWaitTimed(int forRead, int forWrite, PGconn *conn,
time_t finish_time);
extern int pqReadReady(PGconn *conn);
extern int pqWriteReady(PGconn *conn);
/* === in fe-secure.c === */
extern int pqsecure_initialize(PGconn *);
extern PostgresPollingStatusType pqsecure_open_client(PGconn *);
extern void pqsecure_close(PGconn *);
extern ssize_t pqsecure_read(PGconn *, void *ptr, size_t len);
extern ssize_t pqsecure_write(PGconn *, const void *ptr, size_t len);
extern ssize_t pqsecure_raw_read(PGconn *, void *ptr, size_t len);
extern ssize_t pqsecure_raw_write(PGconn *, const void *ptr, size_t len);
#if defined(ENABLE_THREAD_SAFETY) && !defined(WIN32)
extern int pq_block_sigpipe(sigset_t *osigset, bool *sigpipe_pending);
extern void pq_reset_sigpipe(sigset_t *osigset, bool sigpipe_pending,
bool got_epipe);
#endif
/* === SSL === */
/*
* The SSL implementation provides these functions.
*/
/*
* Implementation of PQinitSSL().
*/
extern void pgtls_init_library(bool do_ssl, int do_crypto);
/*
* Initialize SSL library.
*
* The conn parameter is only used to be able to pass back an error
* message - no connection-local setup is made here.
*
* Returns 0 if OK, -1 on failure (with a message in conn->errorMessage).
*/
extern int pgtls_init(PGconn *conn);
/*
* Begin or continue negotiating a secure session.
*/
extern PostgresPollingStatusType pgtls_open_client(PGconn *conn);
/*
* Close SSL connection.
*/
extern void pgtls_close(PGconn *conn);
/*
* Read data from a secure connection.
*
* On failure, this function is responsible for putting a suitable message
* into conn->errorMessage. The caller must still inspect errno, but only
* to determine whether to continue/retry after error.
*/
extern ssize_t pgtls_read(PGconn *conn, void *ptr, size_t len);
/*
* Is there unread data waiting in the SSL read buffer?
*/
extern bool pgtls_read_pending(PGconn *conn);
/*
* Write data to a secure connection.
*
* On failure, this function is responsible for putting a suitable message
* into conn->errorMessage. The caller must still inspect errno, but only
* to determine whether to continue/retry after error.
*/
extern ssize_t pgtls_write(PGconn *conn, const void *ptr, size_t len);
/*
* Get the hash of the server certificate, for SCRAM channel binding type
* tls-server-end-point.
*
* NULL is sent back to the caller in the event of an error, with an
* error message for the caller to consume.
*
* This is not supported with old versions of OpenSSL that don't have
* the X509_get_signature_nid() function.
*/
#if defined(USE_OPENSSL) && (defined(HAVE_X509_GET_SIGNATURE_NID) || defined(HAVE_X509_GET_SIGNATURE_INFO))
#define HAVE_PGTLS_GET_PEER_CERTIFICATE_HASH
extern char *pgtls_get_peer_certificate_hash(PGconn *conn, size_t *len);
#endif
/*
* Verify that the server certificate matches the host name we connected to.
*
* The certificate's Common Name and Subject Alternative Names are considered.
*
* Returns 1 if the name matches, and 0 if it does not. On error, returns
* -1, and sets the libpq error message.
*
*/
extern int pgtls_verify_peer_name_matches_certificate_guts(PGconn *conn,
int *names_examined,
char **first_name);
/* === GSSAPI === */
#ifdef ENABLE_GSS
/*
* Establish a GSSAPI-encrypted connection.
*/
extern PostgresPollingStatusType pqsecure_open_gss(PGconn *conn);
/*
* Read and write functions for GSSAPI-encrypted connections, with internal
* buffering to handle nonblocking sockets.
*/
extern ssize_t pg_GSS_write(PGconn *conn, const void *ptr, size_t len);
extern ssize_t pg_GSS_read(PGconn *conn, void *ptr, size_t len);
#endif
/* === miscellaneous macros === */
/*
* this is so that we can check if a connection is non-blocking internally
* without the overhead of a function call
*/
#define pqIsnonblocking(conn) ((conn)->nonblocking)
#ifdef ENABLE_NLS
extern char *libpq_gettext(const char *msgid) pg_attribute_format_arg(1);
extern char *libpq_ngettext(const char *msgid, const char *msgid_plural, unsigned long n) pg_attribute_format_arg(1) pg_attribute_format_arg(2);
#else
#define libpq_gettext(x) (x)
#define libpq_ngettext(s, p, n) ((n) == 1 ? (s) : (p))
#endif
/*
* These macros are needed to let error-handling code be portable between
* Unix and Windows. (ugh)
*/
#ifdef WIN32
#define SOCK_ERRNO (WSAGetLastError())
#define SOCK_STRERROR winsock_strerror
#define SOCK_ERRNO_SET(e) WSASetLastError(e)
#else
#define SOCK_ERRNO errno
#define SOCK_STRERROR strerror_r
#define SOCK_ERRNO_SET(e) (errno = (e))
#endif
#endif /* LIBPQ_INT_H */
internal/port.h 0000644 00000042340 15051110356 0007515 0 ustar 00 /*-------------------------------------------------------------------------
*
* port.h
* Header for src/port/ compatibility functions.
*
* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/port.h
*
*-------------------------------------------------------------------------
*/
#ifndef PG_PORT_H
#define PG_PORT_H
#include <ctype.h>
#include <netdb.h>
#include <pwd.h>
/*
* Windows has enough specialized port stuff that we push most of it off
* into another file.
* Note: Some CYGWIN includes might #define WIN32.
*/
#if defined(WIN32) && !defined(__CYGWIN__)
#include "port/win32_port.h"
#endif
/* socket has a different definition on WIN32 */
#ifndef WIN32
typedef int pgsocket;
#define PGINVALID_SOCKET (-1)
#else
typedef SOCKET pgsocket;
#define PGINVALID_SOCKET INVALID_SOCKET
#endif
/* non-blocking */
extern bool pg_set_noblock(pgsocket sock);
extern bool pg_set_block(pgsocket sock);
/* Portable path handling for Unix/Win32 (in path.c) */
extern bool has_drive_prefix(const char *filename);
extern char *first_dir_separator(const char *filename);
extern char *last_dir_separator(const char *filename);
extern char *first_path_var_separator(const char *pathlist);
extern void join_path_components(char *ret_path,
const char *head, const char *tail);
extern void canonicalize_path(char *path);
extern void canonicalize_path_enc(char *path, int encoding);
extern void make_native_path(char *path);
extern void cleanup_path(char *path);
extern bool path_contains_parent_reference(const char *path);
extern bool path_is_relative_and_below_cwd(const char *path);
extern bool path_is_prefix_of_path(const char *path1, const char *path2);
extern char *make_absolute_path(const char *path);
extern const char *get_progname(const char *argv0);
extern void get_share_path(const char *my_exec_path, char *ret_path);
extern void get_etc_path(const char *my_exec_path, char *ret_path);
extern void get_include_path(const char *my_exec_path, char *ret_path);
extern void get_pkginclude_path(const char *my_exec_path, char *ret_path);
extern void get_includeserver_path(const char *my_exec_path, char *ret_path);
extern void get_lib_path(const char *my_exec_path, char *ret_path);
extern void get_pkglib_path(const char *my_exec_path, char *ret_path);
extern void get_locale_path(const char *my_exec_path, char *ret_path);
extern void get_doc_path(const char *my_exec_path, char *ret_path);
extern void get_html_path(const char *my_exec_path, char *ret_path);
extern void get_man_path(const char *my_exec_path, char *ret_path);
extern bool get_home_path(char *ret_path);
extern void get_parent_directory(char *path);
/* common/pgfnames.c */
extern char **pgfnames(const char *path);
extern void pgfnames_cleanup(char **filenames);
#define IS_NONWINDOWS_DIR_SEP(ch) ((ch) == '/')
#define is_nonwindows_absolute_path(filename) \
( \
IS_NONWINDOWS_DIR_SEP((filename)[0]) \
)
#define IS_WINDOWS_DIR_SEP(ch) ((ch) == '/' || (ch) == '\\')
/* See path_is_relative_and_below_cwd() for how we handle 'E:abc'. */
#define is_windows_absolute_path(filename) \
( \
IS_WINDOWS_DIR_SEP((filename)[0]) || \
(isalpha((unsigned char) ((filename)[0])) && (filename)[1] == ':' && \
IS_WINDOWS_DIR_SEP((filename)[2])) \
)
/*
* is_absolute_path and IS_DIR_SEP
*
* By using macros here we avoid needing to include path.c in libpq.
*/
#ifndef WIN32
#define IS_DIR_SEP(ch) IS_NONWINDOWS_DIR_SEP(ch)
#define is_absolute_path(filename) is_nonwindows_absolute_path(filename)
#else
#define IS_DIR_SEP(ch) IS_WINDOWS_DIR_SEP(ch)
#define is_absolute_path(filename) is_windows_absolute_path(filename)
#endif
/* Portable locale initialization (in exec.c) */
extern void set_pglocale_pgservice(const char *argv0, const char *app);
/* Portable way to find and execute binaries (in exec.c) */
extern int find_my_exec(const char *argv0, char *retpath);
extern int find_other_exec(const char *argv0, const char *target,
const char *versionstr, char *retpath);
extern char *pipe_read_line(char *cmd, char *line, int maxsize);
/* Doesn't belong here, but this is used with find_other_exec(), so... */
#define PG_BACKEND_VERSIONSTR "postgres (PostgreSQL) " PG_VERSION "\n"
#ifdef EXEC_BACKEND
/* Disable ASLR before exec, for developer builds only (in exec.c) */
extern int pg_disable_aslr(void);
#endif
#if defined(WIN32) || defined(__CYGWIN__)
#define EXE ".exe"
#else
#define EXE ""
#endif
#if defined(WIN32) && !defined(__CYGWIN__)
#define DEVNULL "nul"
#else
#define DEVNULL "/dev/null"
#endif
/* Portable delay handling */
extern void pg_usleep(long microsec);
/* Portable SQL-like case-independent comparisons and conversions */
extern int pg_strcasecmp(const char *s1, const char *s2);
extern int pg_strncasecmp(const char *s1, const char *s2, size_t n);
extern unsigned char pg_toupper(unsigned char ch);
extern unsigned char pg_tolower(unsigned char ch);
extern unsigned char pg_ascii_toupper(unsigned char ch);
extern unsigned char pg_ascii_tolower(unsigned char ch);
/*
* Beginning in v12, we always replace snprintf() and friends with our own
* implementation. This symbol is no longer consulted by the core code,
* but keep it defined anyway in case any extensions are looking at it.
*/
#define USE_REPL_SNPRINTF 1
/*
* Versions of libintl >= 0.13 try to replace printf() and friends with
* macros to their own versions that understand the %$ format. We do the
* same, so disable their macros, if they exist.
*/
#ifdef vsnprintf
#undef vsnprintf
#endif
#ifdef snprintf
#undef snprintf
#endif
#ifdef vsprintf
#undef vsprintf
#endif
#ifdef sprintf
#undef sprintf
#endif
#ifdef vfprintf
#undef vfprintf
#endif
#ifdef fprintf
#undef fprintf
#endif
#ifdef vprintf
#undef vprintf
#endif
#ifdef printf
#undef printf
#endif
extern int pg_vsnprintf(char *str, size_t count, const char *fmt, va_list args);
extern int pg_snprintf(char *str, size_t count, const char *fmt,...) pg_attribute_printf(3, 4);
extern int pg_vsprintf(char *str, const char *fmt, va_list args);
extern int pg_sprintf(char *str, const char *fmt,...) pg_attribute_printf(2, 3);
extern int pg_vfprintf(FILE *stream, const char *fmt, va_list args);
extern int pg_fprintf(FILE *stream, const char *fmt,...) pg_attribute_printf(2, 3);
extern int pg_vprintf(const char *fmt, va_list args);
extern int pg_printf(const char *fmt,...) pg_attribute_printf(1, 2);
/*
* We use __VA_ARGS__ for printf to prevent replacing references to
* the "printf" format archetype in format() attribute declarations.
* That unfortunately means that taking a function pointer to printf
* will not do what we'd wish. (If you need to do that, you must name
* pg_printf explicitly.) For printf's sibling functions, use
* parameterless macros so that function pointers will work unsurprisingly.
*/
#define vsnprintf pg_vsnprintf
#define snprintf pg_snprintf
#define vsprintf pg_vsprintf
#define sprintf pg_sprintf
#define vfprintf pg_vfprintf
#define fprintf pg_fprintf
#define vprintf pg_vprintf
#define printf(...) pg_printf(__VA_ARGS__)
/* This is also provided by snprintf.c */
extern int pg_strfromd(char *str, size_t count, int precision, double value);
/* Replace strerror() with our own, somewhat more robust wrapper */
extern char *pg_strerror(int errnum);
#define strerror pg_strerror
/* Likewise for strerror_r(); note we prefer the GNU API for that */
extern char *pg_strerror_r(int errnum, char *buf, size_t buflen);
#define strerror_r pg_strerror_r
#define PG_STRERROR_R_BUFLEN 256 /* Recommended buffer size for strerror_r */
/* Wrap strsignal(), or provide our own version if necessary */
extern const char *pg_strsignal(int signum);
/* Portable prompt handling */
extern void simple_prompt(const char *prompt, char *destination, size_t destlen,
bool echo);
extern int pclose_check(FILE *stream);
/* Global variable holding time zone information. */
#if defined(WIN32) || defined(__CYGWIN__)
#define TIMEZONE_GLOBAL _timezone
#define TZNAME_GLOBAL _tzname
#else
#define TIMEZONE_GLOBAL timezone
#define TZNAME_GLOBAL tzname
#endif
#if defined(WIN32) || defined(__CYGWIN__)
/*
* Win32 doesn't have reliable rename/unlink during concurrent access.
*/
extern int pgrename(const char *from, const char *to);
extern int pgunlink(const char *path);
/* Include this first so later includes don't see these defines */
#ifdef _MSC_VER
#include <io.h>
#endif
#define rename(from, to) pgrename(from, to)
#define unlink(path) pgunlink(path)
#endif /* defined(WIN32) || defined(__CYGWIN__) */
/*
* Win32 also doesn't have symlinks, but we can emulate them with
* junction points on newer Win32 versions.
*
* Cygwin has its own symlinks which work on Win95/98/ME where
* junction points don't, so use those instead. We have no way of
* knowing what type of system Cygwin binaries will be run on.
* Note: Some CYGWIN includes might #define WIN32.
*/
#if defined(WIN32) && !defined(__CYGWIN__)
extern int pgsymlink(const char *oldpath, const char *newpath);
extern int pgreadlink(const char *path, char *buf, size_t size);
extern bool pgwin32_is_junction(const char *path);
#define symlink(oldpath, newpath) pgsymlink(oldpath, newpath)
#define readlink(path, buf, size) pgreadlink(path, buf, size)
#endif
extern bool rmtree(const char *path, bool rmtopdir);
#if defined(WIN32) && !defined(__CYGWIN__)
/*
* We want the 64-bit variant of lseek().
*
* For Visual Studio, this must be after <io.h> to avoid messing up its
* lseek() and _lseeki64() function declarations.
*
* For MinGW there is already a macro, so we have to undefine it (depending on
* _FILE_OFFSET_BITS, it may point at its own lseek64, but we don't want to
* count on that being set).
*/
#undef lseek
#define lseek(a,b,c) _lseeki64((a),(b),(c))
/*
* We want the 64-bit variant of chsize(). It sets errno and also returns it,
* so convert non-zero result to -1 to match POSIX.
*
* Prevent MinGW from declaring functions, and undefine its macro before we
* define our own.
*/
#ifndef _MSC_VER
#define FTRUNCATE_DEFINED
#include <unistd.h>
#undef ftruncate
#endif
#define ftruncate(a,b) (_chsize_s((a),(b)) == 0 ? 0 : -1)
/*
* open() and fopen() replacements to allow deletion of open files and
* passing of other special options.
*/
#define O_DIRECT 0x80000000
extern HANDLE pgwin32_open_handle(const char *, int, bool);
extern int pgwin32_open(const char *, int,...);
extern FILE *pgwin32_fopen(const char *, const char *);
#define open(a,b,c) pgwin32_open(a,b,c)
#define fopen(a,b) pgwin32_fopen(a,b)
/*
* Mingw-w64 headers #define popen and pclose to _popen and _pclose. We want
* to use our popen wrapper, rather than plain _popen, so override that. For
* consistency, use our version of pclose, too.
*/
#ifdef popen
#undef popen
#endif
#ifdef pclose
#undef pclose
#endif
/*
* system() and popen() replacements to enclose the command in an extra
* pair of quotes.
*/
extern int pgwin32_system(const char *command);
extern FILE *pgwin32_popen(const char *command, const char *type);
#define system(a) pgwin32_system(a)
#define popen(a,b) pgwin32_popen(a,b)
#define pclose(a) _pclose(a)
/* New versions of MingW have gettimeofday, old mingw and msvc don't */
#ifndef HAVE_GETTIMEOFDAY
/* Last parameter not used */
extern int gettimeofday(struct timeval *tp, struct timezone *tzp);
#endif
#else /* !WIN32 */
/*
* Win32 requires a special close for sockets and pipes, while on Unix
* close() does them all.
*/
#define closesocket close
#endif /* WIN32 */
/*
* On Windows, setvbuf() does not support _IOLBF mode, and interprets that
* as _IOFBF. To add insult to injury, setvbuf(file, NULL, _IOFBF, 0)
* crashes outright if "parameter validation" is enabled. Therefore, in
* places where we'd like to select line-buffered mode, we fall back to
* unbuffered mode instead on Windows. Always use PG_IOLBF not _IOLBF
* directly in order to implement this behavior.
*/
#ifndef WIN32
#define PG_IOLBF _IOLBF
#else
#define PG_IOLBF _IONBF
#endif
/*
* Default "extern" declarations or macro substitutes for library routines.
* When necessary, these routines are provided by files in src/port/.
*/
/* Type to use with fseeko/ftello */
#ifndef WIN32 /* WIN32 is handled in port/win32_port.h */
#define pgoff_t off_t
#endif
extern double pg_erand48(unsigned short xseed[3]);
extern long pg_lrand48(void);
extern long pg_jrand48(unsigned short xseed[3]);
extern void pg_srand48(long seed);
#ifndef HAVE_FLS
extern int fls(int mask);
#endif
#ifndef HAVE_GETPEEREID
/* On Windows, Perl might have incompatible definitions of uid_t and gid_t. */
#ifndef PLPERL_HAVE_UID_GID
extern int getpeereid(int sock, uid_t *uid, gid_t *gid);
#endif
#endif
/*
* Glibc doesn't use the builtin for clang due to a *gcc* bug in a version
* newer than the gcc compatibility clang claims to have. This would cause a
* *lot* of superfluous function calls, therefore revert when using clang. In
* C++ there's issues with libc++ (not libstdc++), so disable as well.
*/
#if defined(__clang__) && !defined(__cplusplus)
/* needs to be separate to not confuse other compilers */
#if __has_builtin(__builtin_isinf)
/* need to include before, to avoid getting overwritten */
#include <math.h>
#undef isinf
#define isinf __builtin_isinf
#endif /* __has_builtin(isinf) */
#endif /* __clang__ && !__cplusplus */
#ifndef HAVE_EXPLICIT_BZERO
extern void explicit_bzero(void *buf, size_t len);
#endif
#ifndef HAVE_STRTOF
extern float strtof(const char *nptr, char **endptr);
#endif
#ifdef HAVE_BUGGY_STRTOF
extern float pg_strtof(const char *nptr, char **endptr);
#define strtof(a,b) (pg_strtof((a),(b)))
#endif
#ifndef HAVE_LINK
extern int link(const char *src, const char *dst);
#endif
#ifndef HAVE_MKDTEMP
extern char *mkdtemp(char *path);
#endif
#ifndef HAVE_INET_ATON
#include <netinet/in.h>
#include <arpa/inet.h>
extern int inet_aton(const char *cp, struct in_addr *addr);
#endif
/*
* Windows and older Unix don't have pread(2) and pwrite(2). We have
* replacement functions, but they have slightly different semantics so we'll
* use a name with a pg_ prefix to avoid confusion.
*/
#ifdef HAVE_PREAD
#define pg_pread pread
#else
extern ssize_t pg_pread(int fd, void *buf, size_t nbyte, off_t offset);
#endif
#ifdef HAVE_PWRITE
#define pg_pwrite pwrite
#else
extern ssize_t pg_pwrite(int fd, const void *buf, size_t nbyte, off_t offset);
#endif
#if !HAVE_DECL_STRLCAT
extern size_t strlcat(char *dst, const char *src, size_t siz);
#endif
#if !HAVE_DECL_STRLCPY
extern size_t strlcpy(char *dst, const char *src, size_t siz);
#endif
#if !HAVE_DECL_STRNLEN
extern size_t strnlen(const char *str, size_t maxlen);
#endif
#if !defined(HAVE_RANDOM)
extern long random(void);
#endif
#ifndef HAVE_SETENV
extern int setenv(const char *name, const char *value, int overwrite);
#endif
#ifndef HAVE_UNSETENV
extern void unsetenv(const char *name);
#endif
#ifndef HAVE_SRANDOM
extern void srandom(unsigned int seed);
#endif
#ifndef HAVE_DLOPEN
extern void *dlopen(const char *file, int mode);
extern void *dlsym(void *handle, const char *symbol);
extern int dlclose(void *handle);
extern char *dlerror(void);
#endif
/*
* In some older systems, the RTLD_NOW flag isn't defined and the mode
* argument to dlopen must always be 1.
*/
#if !HAVE_DECL_RTLD_NOW
#define RTLD_NOW 1
#endif
/*
* The RTLD_GLOBAL flag is wanted if available, but it doesn't exist
* everywhere. If it doesn't exist, set it to 0 so it has no effect.
*/
#if !HAVE_DECL_RTLD_GLOBAL
#define RTLD_GLOBAL 0
#endif
/* thread.h */
#ifndef WIN32
extern int pqGetpwuid(uid_t uid, struct passwd *resultbuf, char *buffer,
size_t buflen, struct passwd **result);
#endif
extern int pqGethostbyname(const char *name,
struct hostent *resultbuf,
char *buffer, size_t buflen,
struct hostent **result,
int *herrno);
extern void pg_qsort(void *base, size_t nel, size_t elsize,
int (*cmp) (const void *, const void *));
extern int pg_qsort_strcmp(const void *a, const void *b);
#define qsort(a,b,c,d) pg_qsort(a,b,c,d)
typedef int (*qsort_arg_comparator) (const void *a, const void *b, void *arg);
extern void qsort_arg(void *base, size_t nel, size_t elsize,
qsort_arg_comparator cmp, void *arg);
/* port/chklocale.c */
extern int pg_get_encoding_from_locale(const char *ctype, bool write_message);
#if defined(WIN32) && !defined(FRONTEND)
extern int pg_codepage_to_encoding(UINT cp);
#endif
/* port/inet_net_ntop.c */
extern char *pg_inet_net_ntop(int af, const void *src, int bits,
char *dst, size_t size);
/* port/pg_strong_random.c */
extern bool pg_strong_random(void *buf, size_t len);
/*
* pg_backend_random used to be a wrapper for pg_strong_random before
* Postgres 12 for the backend code.
*/
#define pg_backend_random pg_strong_random
/* port/pgcheckdir.c */
extern int pg_check_dir(const char *dir);
/* port/pgmkdirp.c */
extern int pg_mkdir_p(char *path, int omode);
/* port/pqsignal.c (see also interfaces/libpq/legacy-pqsignal.c) */
#ifdef FRONTEND
#define pqsignal pqsignal_fe
#endif
typedef void (*pqsigfunc) (int signo);
extern pqsigfunc pqsignal(int signo, pqsigfunc func);
/* port/quotes.c */
extern char *escape_single_quotes_ascii(const char *src);
/* common/wait_error.c */
extern char *wait_result_to_str(int exit_status);
extern bool wait_result_is_signal(int exit_status, int signum);
extern bool wait_result_is_any_signal(int exit_status, bool include_command_not_found);
#endif /* PG_PORT_H */
internal/postgres_fe.h 0000644 00000001377 15051110356 0011056 0 ustar 00 /*-------------------------------------------------------------------------
*
* postgres_fe.h
* Primary include file for PostgreSQL client-side .c files
*
* This should be the first file included by PostgreSQL client libraries and
* application programs --- but not by backend modules, which should include
* postgres.h.
*
*
* Portions Copyright (c) 1996-2020, PostgreSQL Global Development Group
* Portions Copyright (c) 1995, Regents of the University of California
*
* src/include/postgres_fe.h
*
*-------------------------------------------------------------------------
*/
#ifndef POSTGRES_FE_H
#define POSTGRES_FE_H
#ifndef FRONTEND
#define FRONTEND 1
#endif
#include "c.h"
#include "common/fe_memutils.h"
#endif /* POSTGRES_FE_H */