939 lines
27 KiB
C
939 lines
27 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: charcodes.c *
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* Last rev: 5/2/88 *
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* mods: *
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* comments: Character codes and character conversion *
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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 includes the definition of a pipe related IO.
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*
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*/
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#include "Yap.h"
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#include "Yatom.h"
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#include "YapHeap.h"
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#include "yapio.h"
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#include <stdlib.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if HAVE_STDARG_H
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#include <stdarg.h>
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#endif
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#ifdef _WIN32
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#if HAVE_IO_H
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/* Windows */
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#include <io.h>
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#endif
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#if HAVE_SOCKET
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#include <winsock2.h>
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#endif
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#include <windows.h>
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#ifndef S_ISDIR
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#define S_ISDIR(x) (((x)&_S_IFDIR) == _S_IFDIR)
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#endif
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#endif
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#include "iopreds.h"
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static Int get_code(USES_REGS1);
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static Int get_byte(USES_REGS1);
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// static Int past_eof( USES_REGS1);
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static Int put_code(USES_REGS1);
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static Int put_byte(USES_REGS1);
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static Int skip(USES_REGS1);
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static Int flush_output(USES_REGS1);
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static Int flush_all_streams(USES_REGS1);
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/**
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* CharOfAtom: convert an atom into a single character.
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*
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* @param at the atom
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*
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* @return the char .
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*/
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INLINE_ONLY inline EXTERN Int CharOfAtom(Atom at) {
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if (IsWideAtom(at)) {
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return at->WStrOfAE[0];
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} else {
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return at->StrOfAE[0];
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}
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}
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static int plUnGetc(int sno, int ch) {
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return ungetc(ch, GLOBAL_Stream[sno].file);
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}
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Int Yap_peek(int sno) {
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CACHE_REGS
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Int ocharcount, olinecount, olinepos;
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StreamDesc *s;
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Int ch;
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s = GLOBAL_Stream + sno;
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ocharcount = s->charcount;
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olinecount = s->linecount;
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olinepos = s->linepos;
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ch = s->stream_wgetc(sno);
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s->charcount = ocharcount;
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s->linecount = olinecount;
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s->linepos = olinepos;
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/* buffer the character */
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if (s->encoding == LOCAL_encoding) {
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ungetwc(ch, s->file);
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} else {
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/* do the ungetc as if a write .. */
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int (*f)(int, int) = s->stream_putc;
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s->stream_putc = plUnGetc;
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put_wchar(sno, ch);
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s->stream_putc = f;
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}
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return ch;
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}
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static Int dopeek_byte(int sno) {
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Int ocharcount, olinecount, olinepos;
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StreamDesc *s;
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Int ch;
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s = GLOBAL_Stream + sno;
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ocharcount = s->charcount;
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olinecount = s->linecount;
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olinepos = s->linepos;
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ch = GLOBAL_Stream[sno].stream_getc(sno);
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s->charcount = ocharcount;
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s->linecount = olinecount;
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s->linepos = olinepos;
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/* buffer the character */
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ungetc(ch, s->file);
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return ch;
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}
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static Int at_end_of_stream(USES_REGS1) { /* at_end_of_stream */
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/* the next character is a EOF */
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int sno = Yap_CheckStream(ARG1, Input_Stream_f, NULL);
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Int out;
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if (sno < 0)
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return (FALSE);
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out = GLOBAL_Stream[sno].status & Eof_Stream_f;
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if (!out) {
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if (GLOBAL_Stream[sno].status & Binary_Stream_f) {
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out = (dopeek_byte(sno) < 0);
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} else {
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out = (Yap_peek(sno) < 0);
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}
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}
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return out;
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}
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static Int at_end_of_stream_0(USES_REGS1) { /* at_end_of_stream */
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/* the next character is a EOF */
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Int out;
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int sno = LOCAL_c_input_stream;
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out = GLOBAL_Stream[sno].status & Eof_Stream_f;
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if (!out) {
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out = (Yap_peek(sno) < 0);
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}
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return out;
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}
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static int yap_fflush(int sno) {
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Yap_ReadlineFlush(sno);
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if ((GLOBAL_Stream[sno].status & Output_Stream_f) &&
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!(GLOBAL_Stream[sno].status &
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(Null_Stream_f | InMemory_Stream_f | Socket_Stream_f | Pipe_Stream_f |
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Free_Stream_f))) {
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return (fflush(GLOBAL_Stream[sno].file));
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} else
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return (0);
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}
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static Int get(USES_REGS1) { /* '$get'(Stream,-N) */
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int sno = Yap_CheckTextStream(ARG1, Input_Stream_f, "get/2");
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int ch;
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// Int status;
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if (sno < 0)
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return FALSE;
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// status = GLOBAL_Stream[sno].status;
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while ((ch = GLOBAL_Stream[sno].stream_wgetc(sno)) <= 32 && ch >= 0)
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;
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return (Yap_unify_constant(ARG2, MkIntegerTerm(ch)));
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}
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static Int get_char(USES_REGS1) { /* '$get'(Stream,-N) */
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int sno = Yap_CheckTextStream(ARG1, Input_Stream_f, "get/2");
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int ch;
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// Int status;
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if (sno < 0)
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return FALSE;
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// status = GLOBAL_Stream[sno].status;
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ch = GLOBAL_Stream[sno].stream_wgetc(sno);
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return (Yap_unify_constant(ARG2, MkCharTerm(ch)));
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}
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static Int get_code(USES_REGS1) { /* get0(Stream,-N) */
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int sno = Yap_CheckTextStream(ARG1, Input_Stream_f, "get0/2");
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// Int status;
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Int out;
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if (sno < 0)
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return (FALSE);
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// status = GLOBAL_Stream[sno].status;
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out = GLOBAL_Stream[sno].stream_wgetc(sno);
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return (Yap_unify_constant(ARG2, MkIntegerTerm(out)));
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}
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static Int get_1(USES_REGS1) { /* get_code1(Stream,-N) */
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int sno = LOCAL_c_input_stream;
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int ch;
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// Int status;
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LOCK(GLOBAL_Stream[sno].streamlock);
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// status = GLOBAL_Stream[sno].status;
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while ((ch = GLOBAL_Stream[sno].stream_wgetc(sno)) <= 32 && ch >= 0)
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;
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return (Yap_unify_constant(ARG2, MkIntegerTerm(ch)));
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}
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static Int getcode_1(USES_REGS1) { /* get0(Stream,-N) */
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int sno = LOCAL_c_input_stream;
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// Int status;
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Int out;
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// status = GLOBAL_Stream[sno].status;
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LOCK(GLOBAL_Stream[sno].streamlock);
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out = GLOBAL_Stream[sno].stream_wgetc(sno);
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return (Yap_unify_constant(ARG1, MkIntegerTerm(out)));
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}
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static Int getchar_1(USES_REGS1) { /* get0(Stream,-N) */
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int sno = LOCAL_c_input_stream;
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// Int status;
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Int out;
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LOCK(GLOBAL_Stream[sno].streamlock);
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// status = GLOBAL_Stream[sno].status;
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out = GLOBAL_Stream[sno].stream_wgetc(sno);
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return (Yap_unify_constant(ARG1, MkCharTerm(out)));
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}
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static Int get0_line_codes(USES_REGS1) { /* '$get0'(Stream,-N) */
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int sno = Yap_CheckTextStream(ARG1, Input_Stream_f, "get0/2");
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// Int status;
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Term out;
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Int ch = '\0';
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int rewind;
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if (sno < 0)
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return (FALSE);
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rewind = FALSE;
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// status = GLOBAL_Stream[sno].status;
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out = read_line(sno);
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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if (rewind)
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return Yap_unify(MkPairTerm(MkIntegerTerm(ch), out), ARG2);
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else
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return Yap_unify(out, ARG2);
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}
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static Int get_byte(USES_REGS1) { /* '$get_byte'(Stream,-N) */
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int sno = Yap_CheckStream(ARG1, Input_Stream_f, "get_byte/2");
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Int status;
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Term out;
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if (sno < 0)
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return (FALSE);
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status = GLOBAL_Stream[sno].status;
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if (!(status & Binary_Stream_f)
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//&& strictISOFlag()
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) {
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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Yap_Error(PERMISSION_ERROR_INPUT_TEXT_STREAM, ARG1, "get_byte/2");
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return (FALSE);
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}
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out = MkIntTerm(GLOBAL_Stream[sno].stream_getc(sno));
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return Yap_unify_constant(ARG2, out);
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}
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static Int get_byte_1(USES_REGS1) { /* '$get_byte'(Stream,-N) */
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int sno = LOCAL_c_input_stream;
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Int status;
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Term out;
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LOCK(GLOBAL_Stream[sno].streamlock);
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status = GLOBAL_Stream[sno].status;
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if (!(status & Binary_Stream_f)
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// &&strictISOFlag()
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) {
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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Yap_Error(PERMISSION_ERROR_INPUT_TEXT_STREAM, ARG1, "get_byte/1");
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return (FALSE);
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}
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out = MkIntTerm(GLOBAL_Stream[sno].stream_getc(sno));
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return Yap_unify_constant(ARG1, out);
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}
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static Int put_code_1(USES_REGS1) { /* '$put'(,N) */
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int sno = LOCAL_c_output_stream, ch;
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Term t2;
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if (IsVarTerm(t2 = Deref(ARG1))) {
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Yap_Error(INSTANTIATION_ERROR, t2, "put_code/1");
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return FALSE;
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} else if (!IsIntegerTerm(t2)) {
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Yap_Error(TYPE_ERROR_INTEGER, t2, "put_code/1");
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return FALSE;
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} else if ((ch = IntegerOfTerm(t2)) < -1) {
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Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, t2, "put_code/1");
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return FALSE;
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}
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LOCK(GLOBAL_Stream[sno].streamlock);
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GLOBAL_Stream[sno].stream_wputc(sno, (int)IntegerOfTerm(Deref(ARG2)));
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/*
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* if (!(GLOBAL_Stream[sno].status & Null_Stream_f))
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* yap_fflush(GLOBAL_Stream[sno].file);
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*/
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return (TRUE);
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}
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static Int put_code(USES_REGS1) { /* '$put'(Stream,N) */
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int ch;
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Term t2;
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int sno;
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if (IsVarTerm(t2 = Deref(ARG2))) {
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Yap_Error(INSTANTIATION_ERROR, t2, "put_code/1");
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return FALSE;
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} else if (!IsIntegerTerm(t2)) {
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Yap_Error(TYPE_ERROR_INTEGER, t2, "put_code/1");
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return FALSE;
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} else if ((ch = IntegerOfTerm(t2)) < -1) {
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Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, t2, "put_code/1");
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return FALSE;
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}
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sno = Yap_CheckTextStream(ARG1, Output_Stream_f, "put/2");
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if (sno < 0)
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return (FALSE);
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if (GLOBAL_Stream[sno].status & Binary_Stream_f) {
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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Yap_Error(PERMISSION_ERROR_OUTPUT_BINARY_STREAM, ARG1, "put/2");
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return (FALSE);
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}
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GLOBAL_Stream[sno].stream_wputc(sno, ch);
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/*
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* if (!(GLOBAL_Stream[sno].status & Null_Stream_f))
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* yap_fflush(GLOBAL_Stream[sno].file);
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*/
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return (TRUE);
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}
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static Int put_char_1(USES_REGS1) { /* '$put'(,N) */
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int sno = LOCAL_c_output_stream;
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Term t2;
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int ch;
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if (IsVarTerm(t2 = Deref(ARG1))) {
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Yap_Error(INSTANTIATION_ERROR, t2, "put_char/1");
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return FALSE;
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} else if (!IsAtomTerm(t2)) {
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Yap_Error(TYPE_ERROR_INTEGER, t2, "put_char/1");
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return FALSE;
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} else if ((ch = CharOfAtom(AtomOfTerm(t2))) < -1) {
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Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, t2, "put_char/1");
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return FALSE;
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}
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LOCK(GLOBAL_Stream[sno].streamlock);
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if (GLOBAL_Stream[sno].status & Binary_Stream_f) {
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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Yap_Error(PERMISSION_ERROR_OUTPUT_BINARY_STREAM, ARG1, "put/2");
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return (FALSE);
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}
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GLOBAL_Stream[sno].stream_wputc(sno, ch);
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/*
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* if (!(GLOBAL_Stream[sno].status & Null_Stream_f))
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* yap_fflush(GLOBAL_Stream[sno].file);
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*/
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return (TRUE);
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}
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static Int put_char(USES_REGS1) { /* '$put'(Stream,N) */
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Term t2;
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int ch;
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int sno;
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if (IsVarTerm(t2 = Deref(ARG2))) {
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Yap_Error(INSTANTIATION_ERROR, t2, "put_char/1");
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return FALSE;
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} else if (!IsAtomTerm(t2)) {
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Yap_Error(TYPE_ERROR_INTEGER, t2, "put_char/1");
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return FALSE;
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} else if ((ch = CharOfAtom(AtomOfTerm(t2))) < -1) {
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Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, t2, "put_char/1");
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return FALSE;
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}
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sno = Yap_CheckTextStream(ARG1, Output_Stream_f, "put/2");
|
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if (sno < 0)
|
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return (FALSE);
|
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if (GLOBAL_Stream[sno].status & Binary_Stream_f) {
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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Yap_Error(PERMISSION_ERROR_OUTPUT_BINARY_STREAM, ARG1, "put/2");
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return (FALSE);
|
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}
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GLOBAL_Stream[sno].stream_wputc(sno, (int)IntegerOfTerm(Deref(ARG2)));
|
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/*
|
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* if (!(GLOBAL_Stream[sno].status & Null_Stream_f))
|
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* yap_fflush(GLOBAL_Stream[sno].file);
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*/
|
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UNLOCK(GLOBAL_Stream[sno].streamlock);
|
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return (TRUE);
|
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}
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static Int tab_1(USES_REGS1) { /* nl */
|
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int sno = LOCAL_c_output_stream;
|
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Term t2;
|
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Int tabs, i;
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if (IsVarTerm(t2 = Deref(ARG2))) {
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Yap_Error(INSTANTIATION_ERROR, t2, "put_char/1");
|
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return FALSE;
|
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} else if (!IsIntegerTerm(t2)) {
|
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Yap_Error(TYPE_ERROR_INTEGER, t2, "put_char/1");
|
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return FALSE;
|
|
} else if ((tabs = IntegerOfTerm(t2)) < 0) {
|
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Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, t2, "tab/1");
|
|
return FALSE;
|
|
}
|
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|
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LOCK(GLOBAL_Stream[sno].streamlock);
|
|
if (GLOBAL_Stream[sno].status & Binary_Stream_f) {
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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Yap_Error(PERMISSION_ERROR_OUTPUT_BINARY_STREAM, ARG1, "nl/0");
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return (FALSE);
|
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}
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for (i = 0; i < tabs; i++)
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GLOBAL_Stream[sno].stream_wputc(sno, ' ');
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/*
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* if (!(GLOBAL_Stream[sno].status & Null_Stream_f))
|
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* yap_fflush(GLOBAL_Stream[sno].file);
|
|
*/
|
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UNLOCK(GLOBAL_Stream[sno].streamlock);
|
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return (TRUE);
|
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}
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|
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static Int tab(USES_REGS1) { /* nl(Stream) */
|
|
int sno = LOCAL_c_output_stream;
|
|
Term t2;
|
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Int tabs, i;
|
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if (IsVarTerm(t2 = Deref(ARG2))) {
|
|
Yap_Error(INSTANTIATION_ERROR, t2, "put_char/1");
|
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return FALSE;
|
|
} else if (!IsIntegerTerm(t2)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER, t2, "put_char/1");
|
|
return FALSE;
|
|
} else if ((tabs = IntegerOfTerm(t2)) < 0) {
|
|
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, t2, "tab/1");
|
|
return FALSE;
|
|
}
|
|
sno = Yap_CheckTextStream(ARG1, Output_Stream_f, "nl/1");
|
|
if (sno < 0)
|
|
return (FALSE);
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|
|
|
if (GLOBAL_Stream[sno].status & Binary_Stream_f) {
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
Yap_Error(PERMISSION_ERROR_OUTPUT_BINARY_STREAM, ARG1, "nl/0");
|
|
return (FALSE);
|
|
}
|
|
|
|
for (i = 0; i < tabs; i++)
|
|
GLOBAL_Stream[sno].stream_wputc(sno, ' ');
|
|
/*
|
|
* if (!(GLOBAL_Stream[sno].status & Null_Stream_f))
|
|
* yap_fflush(GLOBAL_Stream[sno].file);
|
|
*/
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int nl_1(USES_REGS1) { /* nl */
|
|
int sno = LOCAL_c_output_stream;
|
|
LOCK(GLOBAL_Stream[sno].streamlock);
|
|
if (GLOBAL_Stream[sno].status & Binary_Stream_f) {
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
Yap_Error(PERMISSION_ERROR_OUTPUT_BINARY_STREAM, ARG1, "nl/0");
|
|
return (FALSE);
|
|
}
|
|
GLOBAL_Stream[sno].stream_wputc(sno, 10);
|
|
/*
|
|
* if (!(GLOBAL_Stream[sno].status & Null_Stream_f))
|
|
* yap_fflush(GLOBAL_Stream[sno].file);
|
|
*/
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int nl(USES_REGS1) { /* nl(Stream) */
|
|
int sno = Yap_CheckTextStream(ARG1, Output_Stream_f, "nl/1");
|
|
if (sno < 0)
|
|
return (FALSE);
|
|
if (GLOBAL_Stream[sno].status & Binary_Stream_f) {
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
Yap_Error(PERMISSION_ERROR_OUTPUT_BINARY_STREAM, ARG1, "put/2");
|
|
return (FALSE);
|
|
}
|
|
GLOBAL_Stream[sno].stream_wputc(sno, 10);
|
|
/*
|
|
* if (!(GLOBAL_Stream[sno].status & Null_Stream_f))
|
|
* yap_fflush(GLOBAL_Stream[sno].file);
|
|
*/
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int put_byte(USES_REGS1) { /* '$put_byte'(Stream,N) */
|
|
Term t2;
|
|
Int ch;
|
|
if (IsVarTerm(t2 = Deref(ARG2))) {
|
|
Yap_Error(INSTANTIATION_ERROR, t2, "put_code/2");
|
|
return FALSE;
|
|
} else if (!IsIntegerTerm(t2)) {
|
|
Yap_Error(TYPE_ERROR_BYTE, t2, "put_code/2");
|
|
return FALSE;
|
|
} else if ((ch = IntegerOfTerm(t2)) < -1) {
|
|
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, t2, "put_code/1");
|
|
return FALSE;
|
|
}
|
|
int sno = Yap_CheckStream(ARG1, Output_Stream_f, "put/2");
|
|
if (sno < 0)
|
|
return (FALSE);
|
|
if (!(GLOBAL_Stream[sno].status & Binary_Stream_f)
|
|
// && strictISOFlag()
|
|
) {
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
Yap_Error(PERMISSION_ERROR_OUTPUT_TEXT_STREAM, ARG1, NULL);
|
|
return false;
|
|
}
|
|
GLOBAL_Stream[sno].stream_putc(sno, ch);
|
|
/*
|
|
* if (!(GLOBAL_Stream[sno].status & Null_Stream_f))
|
|
* yap_fflush(GLOBAL_Stream[sno].file);
|
|
*/
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int put_byte_1(USES_REGS1) { /* '$put_byte'(Stream,N) */
|
|
Term t2;
|
|
Int ch;
|
|
int sno = LOCAL_c_output_stream;
|
|
if (IsVarTerm(t2 = Deref(ARG1))) {
|
|
Yap_Error(INSTANTIATION_ERROR, t2, "put_code/1");
|
|
return FALSE;
|
|
} else if (!IsIntegerTerm(t2)) {
|
|
Yap_Error(TYPE_ERROR_BYTE, t2, "put_code/1");
|
|
return FALSE;
|
|
} else if ((ch = IntegerOfTerm(t2)) < -1) {
|
|
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, t2, "put_code/1");
|
|
return FALSE;
|
|
}
|
|
LOCK(GLOBAL_Stream[sno].streamlock);
|
|
if (!(GLOBAL_Stream[sno].status & Binary_Stream_f)
|
|
//&& strictISOFlag()
|
|
) {
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
Yap_Error(PERMISSION_ERROR_OUTPUT_TEXT_STREAM, ARG1, "get0/2");
|
|
return (FALSE);
|
|
}
|
|
GLOBAL_Stream[sno].stream_putc(sno, ch);
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int skip_1(USES_REGS1) { /* '$skip'(Stream,N) */
|
|
Int n;
|
|
Term t2;
|
|
int sno;
|
|
int ch;
|
|
|
|
if (IsVarTerm(t2 = Deref(ARG2))) {
|
|
Yap_Error(INSTANTIATION_ERROR, t2, "skip/2");
|
|
return FALSE;
|
|
} else if (!IsIntegerTerm(t2)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER, t2, "skip/2");
|
|
return FALSE;
|
|
} else if ((n = IntegerOfTerm(t2)) < 0) {
|
|
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, t2, "skip/2");
|
|
return FALSE;
|
|
}
|
|
sno = Yap_CheckTextStream(ARG1, Input_Stream_f, "skip/2");
|
|
if (sno < 0)
|
|
return (FALSE);
|
|
while ((ch = GLOBAL_Stream[sno].stream_wgetc(sno)) != n && ch != -1)
|
|
;
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int skip(USES_REGS1) { /* '$skip'(Stream,N) */
|
|
Int n;
|
|
Term t2;
|
|
int sno;
|
|
int ch;
|
|
|
|
if (IsVarTerm(t2 = Deref(ARG2))) {
|
|
Yap_Error(INSTANTIATION_ERROR, t2, "skip/2");
|
|
return FALSE;
|
|
} else if (!IsIntegerTerm(t2)) {
|
|
Yap_Error(TYPE_ERROR_INTEGER, t2, "skip/2");
|
|
return FALSE;
|
|
} else if ((n = IntegerOfTerm(t2)) < 0) {
|
|
Yap_Error(DOMAIN_ERROR_OUT_OF_RANGE, t2, "skip/2");
|
|
return FALSE;
|
|
}
|
|
sno = LOCAL_c_input_stream;
|
|
LOCK(GLOBAL_Stream[sno].streamlock);
|
|
while ((ch = GLOBAL_Stream[sno].stream_wgetc(sno)) != n && ch != -1)
|
|
;
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return (TRUE);
|
|
}
|
|
|
|
/**
|
|
* @pred flush_output(+Stream)
|
|
*
|
|
* Flush the stream _Stream_, that is, make sure all pending output is committed
|
|
* before any further execution.
|
|
*
|
|
* @param +_Stream_
|
|
*
|
|
*/
|
|
static Int flush_output(USES_REGS1) { /* flush_output(Stream) */
|
|
int sno = Yap_CheckStream(ARG1, Output_Stream_f, "flush_output/1");
|
|
if (sno < 0)
|
|
return (FALSE);
|
|
yap_fflush(sno);
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return (TRUE);
|
|
}
|
|
|
|
/**
|
|
* @pred flush_output
|
|
*
|
|
* Flush the current output stream, that is, make sure all pending output is
|
|
*committed
|
|
* before any further execution. By default this is user_output, but it may be
|
|
* changed by current_output/1.
|
|
*
|
|
*/
|
|
static Int flush_output0(USES_REGS1) { /* flush_output */
|
|
yap_fflush(LOCAL_c_output_stream);
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int flush_all_streams(USES_REGS1) { /* $flush_all_streams */
|
|
#if BROKEN_FFLUSH_NULL
|
|
int i;
|
|
for (i = 0; i < MaxStreams; ++i) {
|
|
LOCK(GLOBAL_Stream[i].streamlock);
|
|
yap_fflush(i);
|
|
UNLOCK(GLOBAL_Stream[i].streamlock);
|
|
}
|
|
#else
|
|
fflush(NULL);
|
|
#endif
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
/** @pred peek(+ _S_, - _C_) is deprecated
|
|
|
|
|
|
If _C_ is unbound, or is the code for a character, and
|
|
the stream _S_ is a text stream, read the next character from the
|
|
current stream and unify its code with _C_, while
|
|
leaving the current stream position unaltered.
|
|
|
|
*/
|
|
|
|
/** @pred peek_code(+ _S_, - _C_) is iso
|
|
|
|
|
|
If _C_ is unbound, or is the code for a character, and
|
|
the stream _S_ is a text stream, read the next character from the
|
|
current stream and unify its code with _C_, while
|
|
leaving the current stream position unaltered.
|
|
|
|
*/
|
|
static Int peek_code(USES_REGS1) { /* at_end_of_stream */
|
|
/* the next character is a EOF */
|
|
int sno = Yap_CheckTextStream(ARG1, Input_Stream_f, "peek/2");
|
|
Int ch;
|
|
|
|
if (sno < 0)
|
|
return FALSE;
|
|
if (GLOBAL_Stream[sno].status & Binary_Stream_f) {
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
Yap_Error(PERMISSION_ERROR_INPUT_BINARY_STREAM, ARG1, "peek_code/2");
|
|
return FALSE;
|
|
}
|
|
if ((ch = Yap_peek(sno)) < 0) {
|
|
#ifdef PEEK_EOF
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return false;
|
|
#endif
|
|
}
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return (Yap_unify_constant(ARG2, MkIntTerm(ch)));
|
|
}
|
|
|
|
/** @pred peek_code( - _C_) is iso
|
|
|
|
|
|
If _C_ is unbound, or is the code for a character, and
|
|
the current input stream is a text stream, read the next character from the
|
|
current stream and unify its code with _C_, while
|
|
leaving the current stream position unaltered.
|
|
|
|
*/
|
|
static Int peek_code_1(USES_REGS1) { /* at_end_of_stream */
|
|
/* the next character is a EOF */
|
|
int sno = LOCAL_c_input_stream;
|
|
Int ch;
|
|
|
|
LOCK(GLOBAL_Stream[sno].streamlock);
|
|
if (GLOBAL_Stream[sno].status & Binary_Stream_f) {
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
Yap_Error(PERMISSION_ERROR_INPUT_BINARY_STREAM, ARG1, "peek_code/2");
|
|
return FALSE;
|
|
}
|
|
if ((ch = Yap_peek(sno)) < 0) {
|
|
#ifdef PEEK_EOF
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return false;
|
|
#endif
|
|
}
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return (Yap_unify_constant(ARG1, MkIntTerm(ch)));
|
|
}
|
|
|
|
/** @pred peek_byte(+Stream, - _C_) is iso
|
|
|
|
|
|
If _C_ is unbound, or is a character code, and _Stream_ is a
|
|
binary stream, read the next byte from the current stream and unify its
|
|
code with _C_, while leaving the current stream position unaltered.
|
|
*/
|
|
static Int peek_byte(USES_REGS1) { /* at_end_of_stream */
|
|
/* the next character is a EOF */
|
|
int sno = Yap_CheckStream(ARG1, Input_Stream_f, "peek_byte/2");
|
|
Int ch;
|
|
|
|
if (sno < 0)
|
|
return (FALSE);
|
|
if (!(GLOBAL_Stream[sno].status & Binary_Stream_f)) {
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
Yap_Error(PERMISSION_ERROR_INPUT_STREAM, ARG1, "peek_byte/2");
|
|
return (FALSE);
|
|
}
|
|
if ((ch = dopeek_byte(sno)) < 0) {
|
|
#ifdef PEEK_EOF
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return false;
|
|
#endif
|
|
}
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return (Yap_unify_constant(ARG2, MkIntTerm(ch)));
|
|
}
|
|
|
|
/** @pred peek_byte( - _C_) is iso
|
|
|
|
|
|
If _C_ is unbound, or is a character code, and _Stream_ is a
|
|
binary stream, read the next byte from the current stream and unify its
|
|
code with _C_, while leaving the current stream position unaltered.
|
|
*/
|
|
static Int peek_byte_1(USES_REGS1) { /* at_end_of_stream */
|
|
/* the next character is a EOF */
|
|
int sno = LOCAL_c_input_stream;
|
|
Int ch;
|
|
|
|
if (sno < 0)
|
|
return (FALSE);
|
|
LOCK(GLOBAL_Stream[sno].streamlock);
|
|
if (!(GLOBAL_Stream[sno].status & Binary_Stream_f)) {
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
Yap_Error(PERMISSION_ERROR_INPUT_TEXT_STREAM, ARG1, "peek_byte/2");
|
|
return (FALSE);
|
|
}
|
|
if ((ch = dopeek_byte(sno)) < 0) {
|
|
#ifdef PEEK_EOF
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return false;
|
|
#endif
|
|
}
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return (Yap_unify_constant(ARG2, MkIntTerm(ch)));
|
|
}
|
|
|
|
/** @pred peek_char(+_S_, - _C_) is iso
|
|
|
|
|
|
If _C_ is unbound, or is a character code, and the stream _S_ is a
|
|
binary stream, read the next byte from the current stream and unify the
|
|
atom with _C_, while leaving the stream position unaltered.
|
|
*/
|
|
static Int peek_char(USES_REGS1) {
|
|
/* the next character is a EOF */
|
|
int sno = Yap_CheckTextStream(ARG1, Input_Stream_f, "peek/2");
|
|
wchar_t wsinp[2];
|
|
Int ch;
|
|
|
|
if (sno < 0)
|
|
return false;
|
|
if ((GLOBAL_Stream[sno].status & Binary_Stream_f)) {
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
Yap_Error(PERMISSION_ERROR_INPUT_TEXT_STREAM, ARG1, "peek_byte/2");
|
|
return (FALSE);
|
|
}
|
|
if ((ch = Yap_peek(sno)) < 0) {
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return Yap_unify_constant(ARG2, MkAtomTerm(AtomEof));
|
|
}
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
wsinp[1] = '\0';
|
|
wsinp[0] = ch;
|
|
return Yap_unify_constant(ARG2, MkAtomTerm(Yap_LookupMaybeWideAtom(wsinp)));
|
|
}
|
|
|
|
/** @pred peek_char( - _C_) is iso
|
|
|
|
|
|
If _C_ is unbound, or is a character code, and the current input stream is a
|
|
binary stream, read the next byte from the current stream and unify the
|
|
atom with _C_, while leaving the stream position unaltered.
|
|
*/
|
|
static Int peek_char_1(USES_REGS1) {
|
|
/* the next character is a EOF */
|
|
int sno = LOCAL_c_input_stream;
|
|
wchar_t wsinp[2];
|
|
Int ch;
|
|
|
|
LOCK(GLOBAL_Stream[sno].streamlock);
|
|
if ((ch = Yap_peek(sno)) < 0) {
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
return Yap_unify_constant(ARG2, MkAtomTerm(AtomEof));
|
|
// return false;
|
|
}
|
|
UNLOCK(GLOBAL_Stream[sno].streamlock);
|
|
wsinp[1] = '\0';
|
|
wsinp[0] = ch;
|
|
return Yap_unify_constant(ARG2, MkAtomTerm(Yap_LookupMaybeWideAtom(wsinp)));
|
|
}
|
|
|
|
/** @pred peek(+ _S_, - _C_) is deprecated
|
|
|
|
|
|
If _C_ is unbound, or is the code for a character, and
|
|
the stream _S_ is a text stream, read the next character from the
|
|
current stream and unify its code with _C_, while
|
|
leaving the current stream position unaltered.
|
|
|
|
Please use the ISO built-in peek_code/2.
|
|
*/
|
|
|
|
/** @pred peek( - _C_) is iso
|
|
|
|
|
|
If _C_ is unbound, or is the code for a character, and
|
|
the currrent input stream is a text stream, read the next character from the
|
|
current stream and unify its code with _C_, while
|
|
leaving the current stream position unaltered.
|
|
|
|
*/
|
|
|
|
void Yap_flush(void) { CACHE_REGS(void)flush_all_streams(PASS_REGS1); }
|
|
|
|
void Yap_FlushStreams(void) { CACHE_REGS(void)flush_all_streams(PASS_REGS1); }
|
|
|
|
void Yap_InitCharsio(void) {
|
|
Yap_InitCPred("get", 2, get, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("get_code", 2, get_code, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("get_char", 2, get_char, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("get0", 2, get_code, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("get", 1, get_1, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("get_code", 1, getcode_1, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("get_char", 1, getchar_1, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("get0", 1, getcode_1, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("$get0_line_codes", 2, get0_line_codes,
|
|
SafePredFlag | SyncPredFlag | HiddenPredFlag);
|
|
Yap_InitCPred("get_byte", 2, get_byte, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("get_byte", 1, get_byte_1, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("put", 1, put_code_1, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("put", 2, put_code, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("put_code", 1, put_code_1, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("put_code", 2, put_code, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("put_char", 1, put_char_1, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("put_char", 2, put_char, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("put_byte", 2, put_byte, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("put_byte", 1, put_byte_1, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("put_char", 2, put_char, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("put_char1", 1, put_char_1, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("tab", 2, tab, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("tab1", 1, tab_1, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("nl", 0, nl_1, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("nl", 1, nl, SafePredFlag | SyncPredFlag);
|
|
|
|
Yap_InitCPred("$flush_all_streams", 0, flush_all_streams,
|
|
SafePredFlag | SyncPredFlag | HiddenPredFlag);
|
|
Yap_InitCPred("flush_output", 1, flush_output, SafePredFlag | SyncPredFlag);
|
|
Yap_InitCPred("flush_output", 0, flush_output0, SafePredFlag | SyncPredFlag);
|
|
|
|
Yap_InitCPred("at_end_of_stream", 1, at_end_of_stream,
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SafePredFlag | SyncPredFlag);
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Yap_InitCPred("at_end_of_stream_0", 0, at_end_of_stream_0,
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SafePredFlag | SyncPredFlag);
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// Yap_InitCPred ("$past_eof", 1, past_eof, SafePredFlag|SyncPredFlag);
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Yap_InitCPred("peek", 2, peek_code, SafePredFlag | SyncPredFlag);
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Yap_InitCPred("peek_code", 2, peek_code, SafePredFlag | SyncPredFlag);
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Yap_InitCPred("peek_char", 2, peek_char, SafePredFlag | SyncPredFlag);
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Yap_InitCPred("peek_byte", 2, peek_byte, SafePredFlag | SyncPredFlag);
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Yap_InitCPred("peek", 1, peek_code_1, SafePredFlag | SyncPredFlag);
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Yap_InitCPred("peek_code", 1, peek_code_1, SafePredFlag | SyncPredFlag);
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Yap_InitCPred("peek_char", 1, peek_char_1, SafePredFlag | SyncPredFlag);
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Yap_InitCPred("peek_byte", 1, peek_byte_1, SafePredFlag | SyncPredFlag);
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Yap_InitCPred("skip", 2, skip, SafePredFlag | SyncPredFlag);
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Yap_InitCPred("skip1", 1, skip_1, SafePredFlag | SyncPredFlag);
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Yap_InitCPred("tab", 2, tab, SafePredFlag | SyncPredFlag);
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Yap_InitCPred("tab1", 1, tab_1, SafePredFlag | SyncPredFlag);
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}
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