486 lines
16 KiB
C
486 lines
16 KiB
C
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#ifndef _PL_STREAM_H
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#define _PL_STREAM_H
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#ifndef _PL_EXPORT_DONE
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#define _PL_EXPORT_DONE
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#if (defined(__WINDOWS__) || defined(__CYGWIN__)) && !defined(__LCC__)
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#define HAVE_DECLSPEC
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#endif
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#ifdef HAVE_DECLSPEC
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# ifdef PL_KERNEL
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#define PL_EXPORT(type) __declspec(dllexport) type
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#define PL_EXPORT_DATA(type) __declspec(dllexport) type
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#define install_t void
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# else
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# ifdef __BORLANDC__
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#define PL_EXPORT(type) type _stdcall
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#define PL_EXPORT_DATA(type) extern type
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# else
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#define PL_EXPORT(type) extern type
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#define PL_EXPORT_DATA(type) __declspec(dllimport) type
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# endif
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#define install_t __declspec(dllexport) void
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# endif
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#else /*HAVE_DECLSPEC*/
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#define PL_EXPORT(type) extern type
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#define PL_EXPORT_DATA(type) extern type
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#define install_t void
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#endif /*HAVE_DECLSPEC*/
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#endif /*_PL_EXPORT_DONE*/
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/* This appears to make the wide-character support compile and work
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on HPUX 11.23. There really should be a cleaner way ...
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*/
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#if defined(__hpux)
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#include <sys/_mbstate_t.h>
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#endif
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#if defined(_MSC_VER) && !defined(__WINDOWS__)
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#define __WINDOWS__ 1
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#endif
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#include <stdarg.h>
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#include <wchar.h>
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#include <stddef.h>
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#ifdef __WINDOWS__
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#ifndef INT64_T_DEFINED
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#define INT64_T_DEFINED 1
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typedef __int64 int64_t;
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typedef unsigned __int64 uint64_t;
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#if (_MSC_VER < 1300) && !defined(__MINGW32__)
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typedef long intptr_t;
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typedef unsigned long uintptr_t;
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typedef intptr_t ssize_t; /* signed version of size_t */
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#endif
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#endif
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#else
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#include <unistd.h>
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#include <inttypes.h> /* more portable than stdint.h */
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*******************************
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* CONSTANTS *
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*******************************/
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#ifndef EOF
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#define EOF (-1)
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#endif
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#ifndef NULL
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#define NULL ((void *)0)
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#endif
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#if defined(__WINDOWS__) && !defined(EWOULDBLOCK)
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#define EWOULDBLOCK 1000 /* Needed for socket handling */
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#endif
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#define EPLEXCEPTION 1001 /* errno: pending Prolog exception */
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#define SIO_BUFSIZE (4096) /* buffering buffer-size */
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#define SIO_LINESIZE (1024) /* Sgets() default buffer size */
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#define SIO_MAGIC (7212676) /* magic number */
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#define SIO_CMAGIC (42) /* we are close (and thus illegal!) */
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typedef ssize_t (*Sread_function)(void *handle, char *buf, size_t bufsize);
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typedef ssize_t (*Swrite_function)(void *handle, char*buf, size_t bufsize);
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typedef long (*Sseek_function)(void *handle, long pos, int whence);
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typedef int64_t (*Sseek64_function)(void *handle, int64_t pos, int whence);
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typedef int (*Sclose_function)(void *handle);
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typedef int (*Scontrol_function)(void *handle, int action, void *arg);
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#if defined(THREADS) && !defined(O_PLMT)
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#define O_PLMT 1
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#endif
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#if defined(O_PLMT) && defined(PL_KERNEL)
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/* Support PL_LOCK in the interface */
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#if THREADS
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#include <pthread.h>
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typedef pthread_mutex_t simpleMutex;
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#define simpleMutexInit(p) pthread_mutex_init(p, NULL)
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#define simpleMutexDelete(p) pthread_mutex_destroy(p)
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#define simpleMutexLock(p) pthread_mutex_lock(p)
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#define simpleMutexUnlock(p) pthread_mutex_unlock(p)
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typedef pthread_mutex_t recursiveMutex;
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#define NEED_RECURSIVE_MUTEX_INIT 1
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extern int recursiveMutexInit(recursiveMutex *m);
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#define recursiveMutexDelete(p) pthread_mutex_destroy(p)
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#define recursiveMutexLock(p) pthread_mutex_lock(p)
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#define recursiveMutexTryLock(p) pthread_mutex_trylock(p)
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#define recursiveMutexUnlock(p) pthread_mutex_unlock(p)
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#define IF_MT(id, g) if ( id == L_THREAD || GD->thread.enabled ) g
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typedef struct counting_mutex
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{ simpleMutex mutex; /* mutex itself */
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const char *name; /* name of the mutex */
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long count; /* # times locked */
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long unlocked; /* # times unlocked */
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#ifdef O_CONTENTION_STATISTICS
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long collisions; /* # contentions */
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#endif
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struct counting_mutex *next; /* next of allocated chain */
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} counting_mutex;
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extern counting_mutex *allocSimpleMutex(const char *name);
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extern void freeSimpleMutex(counting_mutex *m);
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extern counting_mutex _PL_mutexes[]; /* Prolog mutexes */
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#define L_MISC 0
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#define L_ALLOC 1
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#define L_ATOM 2
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#define L_FLAG 3
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#define L_FUNCTOR 4
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#define L_RECORD 5
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#define L_THREAD 6
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#define L_PREDICATE 7
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#define L_MODULE 8
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#define L_TABLE 9
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#define L_BREAK 10
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#define L_FILE 11
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#define L_PLFLAG 12
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#define L_OP 13
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#define L_INIT 14
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#define L_TERM 15
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#define L_GC 16
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#define L_AGC 17
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#define L_FOREIGN 18
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#define L_OS 19
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#ifdef O_CONTENTION_STATISTICS
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#define countingMutexLock(cm) \
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do \
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{ if ( pthread_mutex_trylock(&(cm)->mutex) == EBUSY ) \
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{ (cm)->collisions++; \
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pthread_mutex_lock(&(cm)->mutex); \
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} \
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(cm)->count++; \
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} while(0)
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#else
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#define countingMutexLock(cm) \
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do \
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{ simpleMutexLock(&(cm)->mutex); \
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(cm)->count++; \
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} while(0)
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#endif
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#define countingMutexUnlock(cm) \
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do \
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{ (cm)->unlocked++; \
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assert((cm)->unlocked <= (cm)->count); \
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simpleMutexUnlock(&(cm)->mutex); \
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} while(0)
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#define PL_LOCK(id) IF_MT(id, countingMutexLock(&_PL_mutexes[id]))
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#define PL_UNLOCK(id) IF_MT(id, countingMutexUnlock(&_PL_mutexes[id]))
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#define IOLOCK recursiveMutex
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#endif
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#else
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#define PL_LOCK(X)
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#define PL_UNLOCK(X)
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typedef void * IOLOCK;
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#endif
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typedef struct io_functions
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{ Sread_function read; /* fill the buffer */
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Swrite_function write; /* empty the buffer */
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Sseek_function seek; /* seek to position */
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Sclose_function close; /* close stream */
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Scontrol_function control; /* Info/control */
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Sseek64_function seek64; /* seek to position (intptr_t files) */
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} IOFUNCTIONS;
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typedef struct io_position
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{ int64_t byteno; /* byte-position in file */
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int64_t charno; /* character position in file */
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int lineno; /* lineno in file */
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int linepos; /* position in line */
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intptr_t reserved[2]; /* future extensions */
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} IOPOS;
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/* NOTE: check with encoding_names */
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/* in pl-file.c */
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typedef enum
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{ ENC_UNKNOWN = 0, /* invalid/unknown */
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ENC_OCTET, /* raw 8 bit input */
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ENC_ASCII, /* US-ASCII (0..127) */
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ENC_ISO_LATIN_1, /* ISO Latin-1 (0..256) */
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ENC_ANSI, /* default (multibyte) codepage */
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ENC_UTF8,
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ENC_UNICODE_BE, /* big endian unicode file */
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ENC_UNICODE_LE, /* little endian unicode file */
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ENC_WCHAR /* pl_wchar_t */
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} IOENC;
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#define SIO_NL_POSIX 0 /* newline as \n */
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#define SIO_NL_DOS 1 /* newline as \r\n */
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#define SIO_NL_DETECT 3 /* detect processing mode */
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typedef struct io_stream
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{ char *bufp; /* `here' */
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char *limitp; /* read/write limit */
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char *buffer; /* the buffer */
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char *unbuffer; /* Sungetc buffer */
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int lastc; /* last character written */
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int magic; /* magic number SIO_MAGIC */
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int bufsize; /* size of the buffer */
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int flags; /* Status flags */
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IOPOS posbuf; /* location in file */
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IOPOS * position; /* pointer to above */
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void *handle; /* function's handle */
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IOFUNCTIONS *functions; /* open/close/read/write/seek */
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int locks; /* lock/unlock count */
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IOLOCK * mutex; /* stream mutex */
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/* SWI-Prolog 4.0.7 */
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void (*close_hook)(void* closure);
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void * closure;
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/* SWI-Prolog 5.1.3 */
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int timeout; /* timeout (milliseconds) */
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/* SWI-Prolog 5.4.4 */
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char * message; /* error/warning message */
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IOENC encoding; /* character encoding used */
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struct io_stream * tee; /* copy data to this stream */
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mbstate_t * mbstate; /* ENC_ANSI decoding */
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struct io_stream * upstream; /* stream providing our input */
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struct io_stream * downstream; /* stream providing our output */
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unsigned newline : 2; /* Newline mode */
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unsigned erased : 1; /* Stream was erased */
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unsigned references : 4; /* Reference-count */
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int io_errno; /* Save errno value */
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void * exception; /* pending exception (record_t) */
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intptr_t reserved[2]; /* reserved for extension */
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} IOSTREAM;
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#define SmakeFlag(n) (1<<(n-1))
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#define SIO_FBUF SmakeFlag(1) /* full buffering */
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#define SIO_LBUF SmakeFlag(2) /* line buffering */
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#define SIO_NBUF SmakeFlag(3) /* no buffering */
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#define SIO_FEOF SmakeFlag(4) /* end-of-file */
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#define SIO_FERR SmakeFlag(5) /* error ocurred */
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#define SIO_USERBUF SmakeFlag(6) /* buffer is from user */
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#define SIO_INPUT SmakeFlag(7) /* input stream */
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#define SIO_OUTPUT SmakeFlag(8) /* output stream */
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#define SIO_NOLINENO SmakeFlag(9) /* line no. info is void */
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#define SIO_NOLINEPOS SmakeFlag(10) /* line pos is void */
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#define SIO_STATIC SmakeFlag(11) /* Stream in static memory */
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#define SIO_RECORDPOS SmakeFlag(12) /* Maintain position */
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#define SIO_FILE SmakeFlag(13) /* Stream refers to an OS file */
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#define SIO_PIPE SmakeFlag(14) /* Stream refers to an OS pipe */
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#define SIO_NOFEOF SmakeFlag(15) /* don't set SIO_FEOF flag */
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#define SIO_TEXT SmakeFlag(16) /* text-mode operation */
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#define SIO_FEOF2 SmakeFlag(17) /* attempt to read past eof */
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#define SIO_FEOF2ERR SmakeFlag(18) /* Sfpasteof() */
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#define SIO_NOCLOSE SmakeFlag(19) /* Do not close on abort */
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#define SIO_APPEND SmakeFlag(20) /* opened in append-mode */
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#define SIO_UPDATE SmakeFlag(21) /* opened in update-mode */
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#define SIO_ISATTY SmakeFlag(22) /* Stream is a tty */
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#define SIO_CLOSING SmakeFlag(23) /* We are closing the stream */
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#define SIO_TIMEOUT SmakeFlag(24) /* We had a timeout */
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#define SIO_NOMUTEX SmakeFlag(25) /* Do not allow multi-thread access */
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#define SIO_ADVLOCK SmakeFlag(26) /* File locked with advisory lock */
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#define SIO_WARN SmakeFlag(27) /* Pending warning */
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#define SIO_CLEARERR SmakeFlag(28) /* Clear error after reporting */
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#define SIO_REPXML SmakeFlag(29) /* Bad char --> XML entity */
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#define SIO_REPPL SmakeFlag(30) /* Bad char --> Prolog \hex\ */
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#define SIO_BOM SmakeFlag(31) /* BOM was detected/written */
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#define SIO_SEEK_SET 0 /* From beginning of file. */
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#define SIO_SEEK_CUR 1 /* From current position. */
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#define SIO_SEEK_END 2 /* From end of file. */
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PL_EXPORT(IOSTREAM *) S__getiob(void); /* get DLL's __iob[] address */
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PL_EXPORT_DATA(IOFUNCTIONS) Sfilefunctions; /* OS file functions */
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PL_EXPORT_DATA(int) Slinesize; /* Sgets() linesize */
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#if (defined(__CYGWIN__) || defined(__MINGW32__)) && !defined(PL_KERNEL)
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#define S__iob S__getiob()
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#else
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PL_EXPORT_DATA(IOSTREAM) S__iob[3]; /* Libs standard streams */
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#endif
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#define Sinput (&S__iob[0]) /* Stream Sinput */
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#define Soutput (&S__iob[1]) /* Stream Soutput */
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#define Serror (&S__iob[2]) /* Stream Serror */
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#define Sgetchar() Sgetc(Sinput)
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#define Sputchar(c) Sputc((c), Soutput)
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#define S__checkpasteeof(s,c) \
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if ( (c)==-1 && (s)->flags & (SIO_FEOF|SIO_FERR) ) \
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((s)->flags |= SIO_FEOF2)
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#define S__updatefilepos_getc(s, c) \
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((s)->position ? S__fupdatefilepos_getc((s), (c)) \
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: S__fcheckpasteeof((s), (c)))
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#define Snpgetc(s) ((s)->bufp < (s)->limitp ? (int)(*(s)->bufp++)&0xff \
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: S__fillbuf(s))
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#define Sgetc(s) S__updatefilepos_getc((s), Snpgetc(s))
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PL_EXPORT(int) Speekcode(IOSTREAM *s);
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/* Control-operations */
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#define SIO_GETSIZE (1) /* get size of underlying object */
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#define SIO_GETFILENO (2) /* get underlying file (if any) */
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#define SIO_SETENCODING (3) /* modify encoding of stream */
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#define SIO_FLUSHOUTPUT (4) /* flush output */
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#define SIO_LASTERROR (5) /* string holding last error */
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/* Sread_pending() */
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#define SIO_RP_BLOCK 0x1 /* wait for new input */
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#if IOSTREAM_REPLACES_STDIO
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#undef FILE
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#undef stdin
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#undef stdout
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#undef stderr
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#undef putc
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#undef getc
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#undef putchar
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#undef getchar
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#undef feof
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#undef ferror
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#undef fileno
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#undef clearerr
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#define FILE IOSTREAM
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#define stdin Sinput
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#define stdout Soutput
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#define stderr Serror
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#define putc Sputc
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#define getc Sgetc
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#define fputc Sputc
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#define fgetc Sgetc
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#define getw Sgetw
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#define putw Sputw
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#define fread Sfread
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#define fwrite Sfwrite
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#define ungetc Sungetc
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#define putchar Sputchar
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#define getchar Sgetchar
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#define feof Sfeof
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#define ferror Sferror
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#define clearerr Sclearerr
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#define fflush Sflush
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#define fseek Sseek
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#define ftell Stell
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#define fclose Sclose
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#define fgets Sfgets
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#define gets Sgets
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#define fputs Sfputs
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#define puts Sputs
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#define fprintf Sfprintf
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#define printf Sprintf
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#define vprintf Svprintf
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#define vfprintf Svfprintf
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#define sprintf Ssprintf
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#define vsprintf Svsprintf
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#define fopen Sopen_file
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#define fdopen Sfdopen
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#define fileno Sfileno
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#define popen Sopen_pipe
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#endif /*IOSTREAM_REPLACES_STDIO*/
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/*******************************
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* PROTOTYPES *
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*******************************/
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PL_EXPORT(void) SinitStreams(void);
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PL_EXPORT(void) Scleanup(void);
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PL_EXPORT(void) Sreset(void);
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PL_EXPORT(int) S__fupdatefilepos_getc(IOSTREAM *s, int c);
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PL_EXPORT(int) S__fcheckpasteeof(IOSTREAM *s, int c);
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PL_EXPORT(int) S__fillbuf(IOSTREAM *s);
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PL_EXPORT(int) Sunit_size(IOSTREAM *s);
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/* byte I/O */
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PL_EXPORT(int) Sputc(int c, IOSTREAM *s);
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PL_EXPORT(int) Sfgetc(IOSTREAM *s);
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PL_EXPORT(int) Sungetc(int c, IOSTREAM *s);
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/* multibyte I/O */
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PL_EXPORT(int) Scanrepresent(int c, IOSTREAM *s);
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PL_EXPORT(int) Sputcode(int c, IOSTREAM *s);
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PL_EXPORT(int) Sgetcode(IOSTREAM *s);
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PL_EXPORT(int) Sungetcode(int c, IOSTREAM *s);
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/* word I/O */
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PL_EXPORT(int) Sputw(int w, IOSTREAM *s);
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PL_EXPORT(int) Sgetw(IOSTREAM *s);
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PL_EXPORT(size_t) Sfread(void *data, size_t size, size_t elems,
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IOSTREAM *s);
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PL_EXPORT(size_t) Sfwrite(const void *data, size_t size, size_t elems,
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IOSTREAM *s);
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PL_EXPORT(int) Sfeof(IOSTREAM *s);
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PL_EXPORT(int) Sfpasteof(IOSTREAM *s);
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PL_EXPORT(int) Sferror(IOSTREAM *s);
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PL_EXPORT(void) Sclearerr(IOSTREAM *s);
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PL_EXPORT(void) Sseterr(IOSTREAM *s, int which, const char *message);
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#ifdef _FLI_H_INCLUDED
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PL_EXPORT(void) Sset_exception(IOSTREAM *s, term_t ex);
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#else
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PL_EXPORT(void) Sset_exception(IOSTREAM *s, intptr_t ex);
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#endif
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PL_EXPORT(int) Ssetenc(IOSTREAM *s, IOENC new_enc, IOENC *old_enc);
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PL_EXPORT(int) Sflush(IOSTREAM *s);
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PL_EXPORT(long) Ssize(IOSTREAM *s);
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PL_EXPORT(int) Sseek(IOSTREAM *s, long pos, int whence);
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PL_EXPORT(long) Stell(IOSTREAM *s);
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PL_EXPORT(int) Sclose(IOSTREAM *s);
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PL_EXPORT(char *) Sfgets(char *buf, int n, IOSTREAM *s);
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PL_EXPORT(char *) Sgets(char *buf);
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PL_EXPORT(ssize_t) Sread_pending(IOSTREAM *s,
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char *buf, size_t limit, int flags);
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PL_EXPORT(int) Sfputs(const char *q, IOSTREAM *s);
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PL_EXPORT(int) Sputs(const char *q);
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PL_EXPORT(int) Sfprintf(IOSTREAM *s, const char *fm, ...);
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PL_EXPORT(int) Sprintf(const char *fm, ...);
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PL_EXPORT(int) Svprintf(const char *fm, va_list args);
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PL_EXPORT(int) Svfprintf(IOSTREAM *s, const char *fm, va_list args);
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PL_EXPORT(int) Ssprintf(char *buf, const char *fm, ...);
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PL_EXPORT(int) Svsprintf(char *buf, const char *fm, va_list args);
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PL_EXPORT(int) Svdprintf(const char *fm, va_list args);
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PL_EXPORT(int) Sdprintf(const char *fm, ...);
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PL_EXPORT(int) Slock(IOSTREAM *s);
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PL_EXPORT(int) StryLock(IOSTREAM *s);
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PL_EXPORT(int) Sunlock(IOSTREAM *s);
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PL_EXPORT(IOSTREAM *) Snew(void *handle, int flags, IOFUNCTIONS *functions);
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PL_EXPORT(IOSTREAM *) Sopen_file(const char *path, const char *how);
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PL_EXPORT(IOSTREAM *) Sfdopen(int fd, const char *type);
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PL_EXPORT(int) Sfileno(IOSTREAM *s);
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PL_EXPORT(IOSTREAM *) Sopen_pipe(const char *command, const char *type);
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PL_EXPORT(IOSTREAM *) Sopenmem(char **buffer, size_t *sizep, const char *mode);
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PL_EXPORT(IOSTREAM *) Sopen_string(IOSTREAM *s, char *buf, size_t sz, const char *m);
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PL_EXPORT(int) Sclosehook(void (*hook)(IOSTREAM *s));
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PL_EXPORT(void) Sfree(void *ptr);
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PL_EXPORT(int) Sset_filter(IOSTREAM *parent, IOSTREAM *filter);
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PL_EXPORT(void) Ssetbuffer(IOSTREAM *s, char *buf, size_t size);
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PL_EXPORT(int64_t) Stell64(IOSTREAM *s);
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PL_EXPORT(int) Sseek64(IOSTREAM *s, int64_t pos, int whence);
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PL_EXPORT(int) ScheckBOM(IOSTREAM *s);
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PL_EXPORT(int) SwriteBOM(IOSTREAM *s);
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PL_EXPORT(ssize_t) Sread_user(void *handle, char *buf, size_t size);
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#ifdef __cplusplus
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}
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#endif
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#endif /*_PL_STREAM_H*/
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