0705ca0640
git-svn-id: https://yap.svn.sf.net/svnroot/yap/trunk@1725 b08c6af1-5177-4d33-ba66-4b1c6b8b522a
141 lines
3.3 KiB
C
141 lines
3.3 KiB
C
/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: iopreds.c *
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* Last rev: 5/2/88 *
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* mods: *
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* comments: Input/Output C implemented predicates *
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* *
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*************************************************************************/
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#ifdef SCCS
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static char SccsId[] = "%W% %G%";
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#endif
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/*
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* This file defines main data-structure for stream management,
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*
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*/
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#if _MSC_VER || defined(__MINGW32__)
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#include <windows.h>
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#endif
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#include <wchar.h>
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#if HAVE_LIBREADLINE
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#if _MSC_VER || defined(__MINGW32__)
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FILE *rl_instream, *rl_outstream;
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#endif
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#endif
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typedef int (*GetsFunc)(int, UInt, char *);
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typedef struct stream_desc
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{
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union {
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struct {
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Atom name;
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Term user_name;
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#if defined(__MINGW32__) || _MSC_VER
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#define PLGETC_BUF_SIZE 4096
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char *buf, *ptr;
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int left;
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#endif
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YP_File file;
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} file;
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struct {
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char *buf; /* where the file is being read from/written to */
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Int max_size; /* maximum buffer size (may be changed dynamically) */
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UInt pos;
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volatile void *error_handler;
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} mem_string;
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struct {
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#if defined(__MINGW32__) || _MSC_VER
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HANDLE hdl;
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#else
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int fd;
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#endif
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} pipe;
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#if USE_SOCKET
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struct {
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socket_domain domain;
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socket_info flags;
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int fd;
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} socket;
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#endif
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} u;
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Int charcount, linecount, linepos;
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Int status;
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wchar_t och;
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#if defined(YAPOR) || defined(THREADS)
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lockvar streamlock; /* protect stream access */
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#endif
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int (* stream_putc)(int, int); /* function the stream uses for writing */
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int (* stream_getc)(int); /* function the stream uses for reading */
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GetsFunc stream_gets; /* function the stream uses for reading a sequence of characters */
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/* function the stream uses for parser. It may be different if the ISO
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character conversion is on */
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wchar_t (* stream_wgetc_for_read)(int);
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wchar_t (* stream_wgetc)(int);
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wchar_t (* stream_wputc)(int,wchar_t);
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encoding_t encoding;
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int use_bom;
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mbstate_t mbstate;
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}
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StreamDesc;
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#define YAP_ERROR NIL
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#define MaxStreams 64
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#define Free_Stream_f 0x000001
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#define Output_Stream_f 0x000002
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#define Input_Stream_f 0x000004
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#define Append_Stream_f 0x000008
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#define Eof_Stream_f 0x000010
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#define Null_Stream_f 0x000020
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#define Tty_Stream_f 0x000040
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#define Socket_Stream_f 0x000080
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#define Binary_Stream_f 0x000100
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#define Eof_Error_Stream_f 0x000200
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#define Reset_Eof_Stream_f 0x000400
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#define Past_Eof_Stream_f 0x000800
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#define Push_Eof_Stream_f 0x001000
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#define Seekable_Stream_f 0x002000
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#define Promptable_Stream_f 0x004000
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#if USE_SOCKET
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#define Client_Socket_Stream_f 0x008000
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#define Server_Socket_Stream_f 0x010000
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#endif
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#define InMemory_Stream_f 0x020000
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#define Pipe_Stream_f 0x040000
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#define Popen_Stream_f 0x080000
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#define User_Stream_f 0x100000
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#define StdInStream 0
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#define StdOutStream 1
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#define StdErrStream 2
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#define ALIASES_BLOCK_SIZE 8
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void STD_PROTO (Yap_InitStdStreams, (void));
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EXTERN inline int
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GetCurInpPos (int inp_stream)
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{
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return (Stream[inp_stream].linecount);
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}
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