/************************************************************************* * * * YAP Prolog * * * * Yap Prolog was developed at NCCUP - Universidade do Porto * * * * Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 * * * ************************************************************************** * * * File: iopreds.c * * Last rev: 5/2/88 * * mods: * * comments: Input/Output C implemented predicates * * * *************************************************************************/ #ifdef SCCS static char SccsId[] = "%W% %G%"; #endif /* * This file includes the definition of a miscellania of standard predicates * for yap refering to: Files and Streams, Simple Input/Output, * */ #include "Yap.h" #include "Yatom.h" #include "YapHeap.h" #include "yapio.h" #include "eval.h" #include #if HAVE_STDARG_H #include #endif #if HAVE_CTYPE_H #include #endif #if HAVE_WCTYPE_H #include #endif #if HAVE_SYS_TIME_H #include #endif #if HAVE_SYS_TYPES_H #include #endif #ifdef HAVE_SYS_STAT_H #include #endif #if HAVE_SYS_SELECT_H && !_MSC_VER && !defined(__MINGW32__) #include #endif #ifdef HAVE_UNISTD_H #include #endif #if HAVE_STRING_H #include #endif #if HAVE_SIGNAL_H #include #endif #if HAVE_FCNTL_H /* for O_BINARY and O_TEXT in WIN32 */ #include #endif #ifdef _WIN32 #if HAVE_IO_H /* Windows */ #include #endif #endif #if !HAVE_STRNCAT #define strncat(X,Y,Z) strcat(X,Y) #endif #if !HAVE_STRNCPY #define strncpy(X,Y,Z) strcpy(X,Y) #endif #if _MSC_VER || defined(__MINGW32__) #include #ifndef S_ISDIR #define S_ISDIR(x) (((x)&_S_IFDIR)==_S_IFDIR) #endif #endif #include "iopreds.h" STATIC_PROTO (Int PlIOError, (yap_error_number, Term, char *)); STATIC_PROTO (int FilePutc, (int, int)); STATIC_PROTO (int console_post_process_read_char, (int, StreamDesc *)); STATIC_PROTO (int console_post_process_eof, (StreamDesc *)); STATIC_PROTO (int post_process_read_char, (int, StreamDesc *)); STATIC_PROTO (int post_process_eof, (StreamDesc *)); STATIC_PROTO (int ConsolePutc, (int, int)); STATIC_PROTO (int PlGetc, (int)); STATIC_PROTO (int DefaultGets, (int,UInt,char*)); STATIC_PROTO (int PlGets, (int,UInt,char*)); STATIC_PROTO (int ISOWGetc, (int)); STATIC_PROTO (int ConsoleGetc, (int)); #if HAVE_LIBREADLINE && HAVE_READLINE_READLINE_H STATIC_PROTO (int ReadlineGetc, (int)); STATIC_PROTO (int ReadlinePutc, (int,int)); #endif STATIC_PROTO (int PlUnGetc, (int)); STATIC_PROTO (Term MkStream, (int)); STATIC_PROTO (int CheckStream, (Term, int, char *)); STATIC_PROTO (Int p_close, (void)); STATIC_PROTO (Int p_write, (void)); STATIC_PROTO (Int p_write2, (void)); STATIC_PROTO (Int p_set_read_error_handler, (void)); STATIC_PROTO (Int p_get_read_error_handler, (void)); STATIC_PROTO (Int p_read, (void)); STATIC_PROTO (Int p_past_eof, (void)); STATIC_PROTO (Int p_skip, (void)); STATIC_PROTO (Int p_write_depth, (void)); STATIC_PROTO (Int p_user_file_name, (void)); STATIC_PROTO (Int p_format, (void)); STATIC_PROTO (Int p_startline, (void)); STATIC_PROTO (Int p_change_type_of_char, (void)); STATIC_PROTO (Int p_type_of_char, (void)); STATIC_PROTO (void CloseStream, (int)); STATIC_PROTO (int get_wchar, (int)); STATIC_PROTO (int put_wchar, (int,wchar_t)); STATIC_PROTO (Term StreamPosition, (int)); static encoding_t DefaultEncoding(void) { char *s = getenv("LANG"); size_t sz; /* if we don't have a LANG then just use ISO_LATIN1 */ if (s == NULL) s = getenv("LC_CTYPE"); if (s == NULL) return ENC_ISO_LATIN1; sz = strlen(s); if (sz >= 5) { if (s[sz-5] == 'U' && s[sz-4] == 'T' && s[sz-3] == 'F' && s[sz-2] == '-' && s[sz-1] == '8') { return ENC_ISO_UTF8; } } return ENC_ISO_ANSI; } static int GetFreeStreamD(void) { int sno; for (sno = 0; sno < MaxStreams; ++sno) { LOCK(Stream[sno].streamlock); if (Stream[sno].status & Free_Stream_f) { break; } UNLOCK(Stream[sno].streamlock); } if (sno == MaxStreams) { return -1; } Stream[sno].encoding = DefaultEncoding(); return sno; } int Yap_GetFreeStreamD(void) { return GetFreeStreamD(); } /* used from C-interface */ int Yap_GetFreeStreamDForReading(void) { int sno = GetFreeStreamD(); StreamDesc *s; if (sno < 0) return sno; s = Stream+sno; s->status |= User_Stream_f|Input_Stream_f; s->charcount = 0; s->linecount = 1; s->linepos = 0; s->stream_wgetc = get_wchar; s->encoding = DefaultEncoding(); if (CharConversionTable != NULL) s->stream_wgetc_for_read = ISOWGetc; else s->stream_wgetc_for_read = s->stream_wgetc; UNLOCK(s->streamlock); return sno; } static void unix_upd_stream_info (StreamDesc * s) { #if _MSC_VER || defined(__MINGW32__) { if ( _isatty(_fileno(s->u.file.file)) ) { s->status |= Tty_Stream_f|Reset_Eof_Stream_f|Promptable_Stream_f; /* make all console descriptors unbuffered */ setvbuf(s->u.file.file, NULL, _IONBF, 0); return; } #if _MSC_VER /* standard error stream should never be buffered */ else if (StdErrStream == s-Stream) { setvbuf(s->u.file.file, NULL, _IONBF, 0); } #endif s->status |= Seekable_Stream_f; return; } #else #if HAVE_ISATTY #if __simplescalar__ /* isatty does not seem to work with simplescar. I'll assume the first three streams will probably be ttys (pipes are not thatg different) */ if (s-Stream < 3) { s->u.file.name = AtomTty; s->status |= Tty_Stream_f|Reset_Eof_Stream_f|Promptable_Stream_f; } #else { int filedes; /* visualc */ filedes = YP_fileno (s->u.file.file); if (isatty (filedes)) { #if HAVE_TTYNAME char *ttys = ttyname(filedes); if (ttys == NULL) s->u.file.name = AtomTty; else s->u.file.name = AtomTtys; #else s->u.file.name = AtomTty; #endif s->status |= Tty_Stream_f|Reset_Eof_Stream_f|Promptable_Stream_f; return; } } #endif #endif /* HAVE_ISATTY */ #endif /* _MSC_VER */ s->status |= Seekable_Stream_f; } static Int p_always_prompt_user(void) { StreamDesc *s = Stream+StdInStream; s->status |= Promptable_Stream_f; s->stream_gets = DefaultGets; #if HAVE_LIBREADLINE && HAVE_READLINE_READLINE_H if (s->status & Tty_Stream_f) { s->stream_getc = ReadlineGetc; if (Stream[0].status & Tty_Stream_f && s->u.file.name == Stream[0].u.file.name) s->stream_putc = ReadlinePutc; s->stream_wputc = put_wchar; } else #endif { /* else just PlGet plus checking for prompt */ s->stream_getc = ConsoleGetc; } return(TRUE); } static int is_same_tty(YP_File f1, YP_File f2) { #if HAVE_TTYNAME return(ttyname(YP_fileno(f1)) == ttyname(YP_fileno(f2))); #else return(TRUE); #endif } static GetsFunc PlGetsFunc(void) { if (CharConversionTable) return DefaultGets; else return PlGets; } static void InitStdStreams (void) { Yap_c_input_stream = StdInStream; Yap_c_output_stream = StdOutStream; Yap_c_error_stream = StdErrStream; } void Yap_InitStdStreams (void) { InitStdStreams(); } static void InitPlIO (void) { Int i; for (i = 0; i < MaxStreams; ++i) { INIT_LOCK(Stream[i].streamlock); Stream[i].status = Free_Stream_f; } InitStdStreams(); } void Yap_InitPlIO (void) { InitPlIO (); } static Int PlIOError (yap_error_number type, Term culprit, char *who) { if (Yap_GetValue(AtomFileerrors) == MkIntTerm(1) || type == RESOURCE_ERROR_MAX_STREAMS /* do not catch resource errors */) { Yap_Error(type, culprit, who); /* and fail */ return FALSE; } else { return FALSE; } } /* * Used by the prompts to check if they are after a newline, and then a * prompt should be output, or if we are in the middle of a line. */ static int newline = TRUE; static void count_output_char(int ch, StreamDesc *s) { if (ch == '\n') { #if MPWSHELL if (mpwshell && (sno == StdOutStream || sno == StdErrStream)) { putc (MPWSEP, s->u.file.file); fflush (stdout); } #endif /* Inform that we have written a newline */ ++s->charcount; ++s->linecount; s->linepos = 0; } else { #if MAC if ((sno == StdOutStream || sno == StdErrStream) && s->linepos > 200) sno->stream_putc(sno, '\n'); #endif ++s->charcount; ++s->linepos; } } static void console_count_output_char(int ch, StreamDesc *s) { if (ch == '\n') { #if MPWSHELL if (mpwshell && (sno == StdOutStream || sno == StdErrStream)) { putc (MPWSEP, s->u.file.file); fflush (stdout); } #endif ++s->charcount; ++s->linecount; s->linepos = 0; newline = TRUE; /* Inform we are not at the start of a newline */ } else { newline = FALSE; #if MAC if ((sno == StdOutStream || sno == StdErrStream) && s->linepos > 200) sno->stream_putc(sno, '\n'); #endif ++s->charcount; ++s->linepos; } } #ifdef DEBUG static int eolflg = 1; static char my_line[200] = {0}; static char *lp = my_line; static YP_File curfile; #ifdef MACC static void InTTYLine(char *line) { char *p = line; char ch; while ((ch = InKey()) != '\n' && ch != '\r') if (ch == 8) { if (line < p) BackupTTY(*--p); } else TTYChar(*p++ = ch); TTYChar('\n'); *p = 0; } #endif void Yap_DebugSetIFile(char *fname) { if (curfile) YP_fclose(curfile); curfile = YP_fopen(fname, "r"); if (curfile == NULL) { curfile = stdin; fprintf(stderr,"%% YAP Warning: can not open %s for input\n", fname); } } void Yap_DebugEndline() { *lp = 0; } int Yap_DebugGetc() { int ch; if (eolflg) { if (curfile != NULL) { if (YP_fgets(my_line, 200, curfile) == 0) curfile = NULL; } if (curfile == NULL) if (YP_fgets(my_line, 200, stdin) == NULL) { return EOF; } eolflg = 0; lp = my_line; } if ((ch = *lp++) == 0) ch = '\n', eolflg = 1; if (Yap_Option['l' - 96]) putc(ch, Yap_logfile); return (ch); } int Yap_DebugPutc(int sno, wchar_t ch) { if (Yap_Option['l' - 96]) (void) putc(ch, Yap_logfile); return (putc(ch, Yap_stderr)); } void Yap_DebugPlWrite(Term t) { Yap_plwrite(t, Yap_DebugPutc, 0, 1200); } void Yap_PlWriteToStream(Term t, int sno, int flags) { Yap_plwrite(t, Stream[sno].stream_wputc, flags, 1200); } void Yap_DebugErrorPutc(int c) { Yap_DebugPutc (Yap_c_error_stream, c); } #endif /* static */ static int FilePutc(int sno, int ch) { StreamDesc *s = &Stream[sno]; #if MAC || _MSC_VER if (ch == 10) { ch = '\n'; } #endif putc(ch, s->u.file.file); #if MAC || _MSC_VER if (ch == 10) { fflush(s->u.file.file); } #endif count_output_char(ch,s); return ((int) ch); } /* static */ static int IOSWIPutc(int sno, int ch) { int i; Yap_StartSlots(); i = (SWIPutc)(ch, Stream[sno].u.swi_stream.swi_ptr); Yap_CloseSlots(); YENV = ENV; return i; } /* static */ static int IOSWIGetc(int sno) { int ch; Yap_StartSlots(); ch = (SWIGetc)(Stream[sno].u.swi_stream.swi_ptr); if (ch == EOF) { return post_process_eof(Stream+sno); } return post_process_read_char(ch, Stream+sno); Yap_CloseSlots(); YENV = ENV; return ch; } /* static */ static int IOSWIWidePutc(int sno, int ch) { int i; Yap_StartSlots(); i = (SWIWidePutc)(ch, Stream[sno].u.swi_stream.swi_ptr); Yap_CloseSlots(); YENV = ENV; return i; } /* static */ static int IOSWIWideGetc(int sno) { int ch; Yap_StartSlots(); ch = (SWIWideGetc)(Stream[sno].u.swi_stream.swi_ptr); if (ch == EOF) { return post_process_eof(Stream+sno); } return post_process_read_char(ch, Stream+sno); Yap_CloseSlots(); YENV = ENV; return ch; } /* static */ static int ConsolePutc (int sno, int ch) { StreamDesc *s = &Stream[sno]; #if MAC || _MSC_VER || defined(__MINGW32__) if (ch == 10) { putc ('\n', s->u.file.file); } else #endif putc (ch, s->u.file.file); console_count_output_char(ch,s); return ((int) ch); } static Int p_is_same_tty (void) { /* 'prompt(Atom) */ int sni = CheckStream (ARG1, Input_Stream_f, "put/2"); int sno = CheckStream (ARG2, Output_Stream_f, "put/2"); int out = (Stream[sni].status & Tty_Stream_f) && (Stream[sno].status & Tty_Stream_f) && is_same_tty(Stream[sno].u.file.file,Stream[sni].u.file.file); UNLOCK(Stream[sno].streamlock); UNLOCK(Stream[sni].streamlock); return out; } #if HAVE_LIBREADLINE && HAVE_READLINE_READLINE_H #include #include static char *ttyptr = NULL; static char *myrl_line = (char *) NULL; static int cur_out_sno = 2; #define READLINE_OUT_BUF_MAX 256 static void InitReadline(void) { ReadlineBuf = (char *)Yap_AllocAtomSpace(READLINE_OUT_BUF_MAX+1); ReadlinePos = ReadlineBuf; #if _MSC_VER || defined(__MINGW32__) rl_instream = stdin; rl_outstream = stdout; #endif } static int ReadlinePutc (int sno, int ch) { if (ReadlinePos != ReadlineBuf && (ReadlinePos - ReadlineBuf == READLINE_OUT_BUF_MAX-1 /* overflow */ || #if MAC || _MSC_VER ch == 10 || #endif ch == '\n')) { #if MAC || _MSC_VER if (ch == 10) { ch = '\n'; } #endif if (ch == '\n') { ReadlinePos[0] = '\n'; ReadlinePos++; } ReadlinePos[0] = '\0'; fputs( ReadlineBuf, Stream[sno].u.file.file); ReadlinePos = ReadlineBuf; if (ch == '\n') { console_count_output_char(ch,Stream+sno); return((int) '\n'); } } *ReadlinePos++ = ch; console_count_output_char(ch,Stream+sno); return ((int) ch); } /* reading from the console is complicated because we need to know whether to prompt and so on... */ static int ReadlineGetc(int sno) { register StreamDesc *s = &Stream[sno]; register wchar_t ch; while (ttyptr == NULL) { /* Only sends a newline if we are at the start of a line */ if (myrl_line) { free (myrl_line); myrl_line = NULL; } rl_instream = Stream[sno].u.file.file; rl_outstream = Stream[cur_out_sno].u.file.file; /* window of vulnerability opened */ if (newline) { Yap_PrologMode |= ConsoleGetcMode; myrl_line = readline (NULL); } else { if (ReadlinePos != ReadlineBuf) { ReadlinePos[0] = '\0'; ReadlinePos = ReadlineBuf; Yap_PrologMode |= ConsoleGetcMode; myrl_line = readline (ReadlineBuf); } else { Yap_PrologMode |= ConsoleGetcMode; myrl_line = readline (NULL); } } /* Do it the gnu way */ if (Yap_PrologMode & InterruptMode) { Yap_PrologMode &= ~InterruptMode; Yap_ProcessSIGINT(); Yap_PrologMode &= ~ConsoleGetcMode; if (Yap_PrologMode & AbortMode) { Yap_Error(PURE_ABORT, TermNil, ""); Yap_ErrorMessage = "Abort"; return console_post_process_eof(s); } continue; } else { Yap_PrologMode &= ~ConsoleGetcMode; } newline=FALSE; strncpy (Prompt, RepAtom (AtPrompt)->StrOfAE, MAX_PROMPT); /* window of vulnerability closed */ if (myrl_line == NULL) return console_post_process_eof(s); if (myrl_line[0] != '\0' && myrl_line[1] != '\0') add_history (myrl_line); ttyptr = myrl_line; } if (*ttyptr == '\0') { ttyptr = NIL; ch = '\n'; } else { ch = *((unsigned char *)ttyptr); ttyptr++; } return console_post_process_read_char(ch, s); } #endif /* HAVE_LIBREADLINE */ static Int p_has_readline(void) { #if HAVE_LIBREADLINE && HAVE_READLINE_READLINE_H return TRUE; #else return FALSE; #endif } int Yap_GetCharForSIGINT(void) { int ch; #if HAVE_LIBREADLINE && HAVE_READLINE_READLINE_H if ((Yap_PrologMode & ConsoleGetcMode) && myrl_line != (char *) NULL) { ch = myrl_line[0]; free(myrl_line); myrl_line = NULL; } else { myrl_line = readline ("Action (h for help): "); if (!myrl_line) { ch = EOF; } else { ch = myrl_line[0]; free(myrl_line); myrl_line = NULL; } } #else /* ask for a new line */ fprintf(stderr, "Action (h for help): "); ch = getc(stdin); /* first process up to end of line */ while ((fgetc(stdin)) != '\n'); #endif newline = TRUE; return ch; } /* handle reading from a stream after having found an EOF */ static int EOFGetc(int sno) { register StreamDesc *s = &Stream[sno]; if (s->status & Push_Eof_Stream_f) { /* ok, we have pushed an EOF, send it away */ s->status &= ~Push_Eof_Stream_f; return EOF; } if (s->status & Eof_Error_Stream_f) { Yap_Error(PERMISSION_ERROR_INPUT_PAST_END_OF_STREAM,MkAtomTerm(s->u.file.name), "GetC"); } else if (s->status & Reset_Eof_Stream_f) { /* reset the eof indicator on file */ if (YP_feof (s->u.file.file)) YP_clearerr (s->u.file.file); /* reset our function for reading input */ if (s->status & Promptable_Stream_f) { s->stream_putc = ConsolePutc; s->stream_wputc = put_wchar; #if HAVE_LIBREADLINE && HAVE_READLINE_READLINE_H if (s->status & Tty_Stream_f) { s->stream_getc = ReadlineGetc; if (Stream[0].status & Tty_Stream_f && is_same_tty(s->u.file.file,Stream[0].u.file.file)) s->stream_putc = ReadlinePutc; } else #endif { s->stream_getc = ConsoleGetc; } } else { s->stream_getc = PlGetc; s->stream_gets = PlGetsFunc(); } if (s->status & SWI_Stream_f) s->stream_wgetc = IOSWIWideGetc; else s->stream_wgetc = get_wchar; if (CharConversionTable != NULL) s->stream_wgetc_for_read = ISOWGetc; else s->stream_wgetc_for_read = s->stream_wgetc; /* next, reset our own error indicator */ s->status &= ~Eof_Stream_f; /* try reading again */ return(s->stream_getc(sno)); } else { s->status |= Past_Eof_Stream_f; } return EOF; } /* check if we read a newline or an EOF */ static int post_process_read_char(int ch, StreamDesc *s) { ++s->charcount; ++s->linepos; if (ch == '\n') { ++s->linecount; s->linepos = 0; /* don't convert if the stream is binary */ if (!(s->status & Binary_Stream_f)) ch = 10; } return ch; } /* check if we read a newline or an EOF */ static int post_process_eof(StreamDesc *s) { s->status |= Eof_Stream_f; s->stream_getc = EOFGetc; s->stream_wgetc = get_wchar; if (CharConversionTable != NULL) s->stream_wgetc_for_read = ISOWGetc; else s->stream_wgetc_for_read = s->stream_wgetc; return EOFCHAR; } /* check if we read a newline or an EOF */ static int console_post_process_read_char(int ch, StreamDesc *s) { /* the character is also going to be output by the console handler */ console_count_output_char(ch,Stream+StdErrStream); if (ch == '\n') { ++s->linecount; ++s->charcount; s->linepos = 0; newline = TRUE; } else { ++s->charcount; ++s->linepos; newline = FALSE; } return ch; } /* check if we read a newline or an EOF */ static int console_post_process_eof(StreamDesc *s) { s->status |= Eof_Stream_f; s->stream_getc = EOFGetc; s->stream_wgetc = get_wchar; if (CharConversionTable != NULL) s->stream_wgetc_for_read = ISOWGetc; else s->stream_wgetc_for_read = s->stream_wgetc; newline = FALSE; return EOFCHAR; } /* standard routine, it should read from anything pointed by a FILE *. It could be made more efficient by doing our own buffering and avoiding post_process_read_char, something to think about */ static int PlGetc (int sno) { StreamDesc *s = &Stream[sno]; Int ch; ch = YP_getc (s->u.file.file); if (ch == EOF) { return post_process_eof(s); } return post_process_read_char(ch, s); } /* standard routine, it should read from anything pointed by a FILE *. It could be made more efficient by doing our own buffering and avoiding post_process_read_char, something to think about */ static int PlGets (int sno, UInt size, char *buf) { register StreamDesc *s = &Stream[sno]; UInt len; if (fgets (buf, size, s->u.file.file) == NULL) { return post_process_eof(s); } len = strlen(buf); s->charcount += len-1; post_process_read_char(buf[len-2], s); return strlen(buf); } /* standard routine, it should read from anything pointed by a FILE *. It could be made more efficient by doing our own buffering and avoiding post_process_read_char, something to think about */ static int DefaultGets (int sno, UInt size, char *buf) { StreamDesc *s = &Stream[sno]; char ch; char *pt = buf; if (!size) return 0; while((ch = *buf++ = s->stream_getc(sno)) != -1 && ch != 10 && --size); *buf++ = '\0'; return (buf-pt)-1; } /* I dispise this code!!!!! */ static int ISOWGetc (int sno) { int ch = Stream[sno].stream_wgetc(sno); if (ch != EOF && CharConversionTable != NULL) { if (ch < NUMBER_OF_CHARS) { /* only do this in ASCII */ return CharConversionTable[ch]; } } return ch; } /* send a prompt, and use the system for internal buffering. Speed is not of the essence here !!! */ static int ConsoleGetc(int sno) { register StreamDesc *s = &Stream[sno]; int ch; restart: /* keep the prompt around, just in case, but don't actually show it in silent mode */ if (newline) { if (!yap_flags[QUIET_MODE_FLAG]) { char *cptr = Prompt, ch; /* use the default routine */ while ((ch = *cptr++) != '\0') { Stream[StdErrStream].stream_putc(StdErrStream, ch); } } strncpy (Prompt, RepAtom (AtPrompt)->StrOfAE, MAX_PROMPT); newline = FALSE; } #if HAVE_SIGINTERRUPT siginterrupt(SIGINT, TRUE); #endif Yap_PrologMode |= ConsoleGetcMode; ch = YP_fgetc(s->u.file.file); #if HAVE_SIGINTERRUPT siginterrupt(SIGINT, FALSE); #endif if (Yap_PrologMode & InterruptMode) { Yap_PrologMode &= ~InterruptMode; Yap_ProcessSIGINT(); Yap_PrologMode &= ~ConsoleGetcMode; newline = TRUE; if (Yap_PrologMode & AbortMode) { Yap_Error(PURE_ABORT, TermNil, ""); Yap_ErrorMessage = "Abort"; return console_post_process_eof(s); } goto restart; } else { Yap_PrologMode &= ~ConsoleGetcMode; } if (ch == EOF) return console_post_process_eof(s); return console_post_process_read_char(ch, s); } /* reads a character from a buffer and does the rest */ static int PlUnGetc (int sno) { register StreamDesc *s = &Stream[sno]; Int ch; if (s->stream_getc != PlUnGetc) return(s->stream_getc(sno)); ch = s->och; if (s->status & Promptable_Stream_f) { s->stream_putc = ConsolePutc; s->stream_wputc = put_wchar; #if HAVE_LIBREADLINE && HAVE_READLINE_READLINE_H if (s->status & Tty_Stream_f) { s->stream_getc = ReadlineGetc; if (Stream[0].status & Tty_Stream_f && is_same_tty(s->u.file.file,Stream[0].u.file.file)) s->stream_putc = ReadlinePutc; s->stream_wputc = put_wchar; } else #endif { s->stream_getc = ConsoleGetc; } } else { s->stream_getc = PlGetc; s->stream_gets = PlGetsFunc(); } return(ch); } static int utf8_nof(char ch) { if (!(ch & 0x20)) return 1; if (!(ch & 0x10)) return 2; if (!(ch & 0x08)) return 3; if (!(ch & 0x04)) return 4; return 5; } static int get_wchar(int sno) { int ch; wchar_t wch; int how_many = 0; while (TRUE) { ch = Stream[sno].stream_getc(sno); if (ch == -1) { if (how_many) { /* error */ } return EOF; } switch (Stream[sno].encoding) { case ENC_OCTET: return ch; case ENC_ISO_LATIN1: return ch; case ENC_ISO_ASCII: if (ch & 0x80) { /* error */ } return ch; case ENC_ISO_ANSI: { char buf[1]; int out; if (!how_many) { memset((void *)&(Stream[sno].mbstate), 0, sizeof(mbstate_t)); } buf[0] = ch; if ((out = mbrtowc(&wch, buf, 1, &(Stream[sno].mbstate))) == 1) return wch; if (out == -1) { /* error */ } how_many++; break; } case ENC_ISO_UTF8: { if (!how_many) { if (ch & 0x80) { how_many = utf8_nof(ch); /* keep a backup of the start character in case we meet an error, useful if we are scanning ISO files. */ Stream[sno].och = ch; wch = (ch & ((1<<(6-how_many))-1))<<(6*how_many); } else { return ch; } } else { how_many--; if ((ch & 0xc0) == 0x80) { wch += (ch & ~0xc0) << (how_many*6); } else { /* error */ /* try to recover character, assume this is our first character */ wchar_t och = Stream[sno].och; Stream[sno].och = ch; Stream[sno].stream_getc = PlUnGetc; Stream[sno].stream_wgetc = get_wchar; Stream[sno].stream_gets = DefaultGets; return och; } if (!how_many) { return wch; } } } break; case ENC_UNICODE_BE: if (how_many) { return wch+ch; } how_many=1; wch = ch << 8; break; case ENC_UNICODE_LE: if (how_many) { return wch+(ch<<8); } how_many=1; wch = ch; break; case ENC_ISO_UTF32_LE: if (!how_many) { how_many = 4; wch = 0; } how_many--; wch += ((unsigned char) (ch & 0xff)) << ((3-how_many)*8); if (how_many == 0) return wch; break; case ENC_ISO_UTF32_BE: if (!how_many) { how_many = 4; wch = 0; } how_many--; wch += ((unsigned char) (ch & 0xff)) << (how_many*8); if (how_many == 0) return wch; break; } } return EOF; } #ifndef MB_LEN_MAX #define MB_LEN_MAX 6 #endif static int handle_write_encoding_error(int sno, wchar_t ch) { if (Stream[sno].status & RepError_Xml_f) { /* use HTML/XML encoding in ASCII */ int i = ch, digits = 1; Stream[sno].stream_putc(sno, '&'); Stream[sno].stream_putc(sno, '#'); while (digits < i) digits *= 10; if (digits > i) digits /= 10; while (i) { Stream[sno].stream_putc(sno, i/digits); i %= 10; digits /= 10; } Stream[sno].stream_putc(sno, ';'); return ch; } else if (Stream[sno].status & RepError_Prolog_f) { /* write quoted */ Stream[sno].stream_putc(sno, '\\'); Stream[sno].stream_putc(sno, 'u'); Stream[sno].stream_putc(sno, ch>>24); Stream[sno].stream_putc(sno, 256&(ch>>16)); Stream[sno].stream_putc(sno, 256&(ch>>8)); Stream[sno].stream_putc(sno, 256&ch); return ch; } else { Yap_Error(REPRESENTATION_ERROR_CHARACTER, MkIntegerTerm(ch),"charater %ld cannot be encoded in stream %d",(unsigned long int)ch,sno); return -1; } } static int put_wchar(int sno, wchar_t ch) { /* pass the bug if we can */ switch (Stream[sno].encoding) { case ENC_OCTET: return Stream[sno].stream_putc(sno, ch); case ENC_ISO_LATIN1: if (ch >= 0xff) { return handle_write_encoding_error(sno,ch); } return Stream[sno].stream_putc(sno, ch); case ENC_ISO_ASCII: if (ch >= 0x80) { return handle_write_encoding_error(sno,ch); } return Stream[sno].stream_putc(sno, ch); case ENC_ISO_ANSI: { char buf[MB_LEN_MAX]; int n; memset((void *)&(Stream[sno].mbstate), 0, sizeof(mbstate_t)); if ( (n = wcrtomb(buf, ch, &(Stream[sno].mbstate))) < 0 ) { /* error */ Stream[sno].stream_putc(sno, ch); return -1; } else { int i; for (i =0; i< n; i++) { Stream[sno].stream_putc(sno, buf[i]); } return ch; } case ENC_ISO_UTF8: if (ch < 0x80) { return Stream[sno].stream_putc(sno, ch); } else if (ch < 0x800) { Stream[sno].stream_putc(sno, 0xC0 | ch>>6); return Stream[sno].stream_putc(sno, 0x80 | (ch & 0x3F)); } else if (ch < 0x10000) { Stream[sno].stream_putc(sno, 0xE0 | ch>>12); Stream[sno].stream_putc(sno, 0x80 | (ch>>6 & 0x3F)); return Stream[sno].stream_putc(sno, 0x80 | (ch & 0x3F)); } else if (ch < 0x200000) { Stream[sno].stream_putc(sno, 0xF0 | ch>>18); Stream[sno].stream_putc(sno, 0x80 | (ch>>12 & 0x3F)); Stream[sno].stream_putc(sno, 0x80 | (ch>>6 & 0x3F)); return Stream[sno].stream_putc(sno, 0x80 | (ch & 0x3F)); } else { /* should never happen */ return -1; } break; case ENC_UNICODE_BE: Stream[sno].stream_putc(sno, (ch>>8)); return Stream[sno].stream_putc(sno, (ch&0xff)); case ENC_UNICODE_LE: Stream[sno].stream_putc(sno, (ch&0xff)); return Stream[sno].stream_putc(sno, (ch>>8)); case ENC_ISO_UTF32_BE: Stream[sno].stream_putc(sno, (ch>>24) & 0xff); Stream[sno].stream_putc(sno, (ch>>16) &0xff); Stream[sno].stream_putc(sno, (ch>>8) & 0xff); return Stream[sno].stream_putc(sno, ch&0xff); case ENC_ISO_UTF32_LE: Stream[sno].stream_putc(sno, ch&0xff); Stream[sno].stream_putc(sno, (ch>>8) & 0xff); Stream[sno].stream_putc(sno, (ch>>16) &0xff); return Stream[sno].stream_putc(sno, (ch>>24) & 0xff); } } return -1; } /* used by user-code to read characters from the current input stream */ int Yap_PlGetchar (void) { return(Stream[Yap_c_input_stream].stream_getc(Yap_c_input_stream)); } int Yap_PlGetWchar (void) { return get_wchar(Yap_c_input_stream); } /* avoid using a variable to call a function */ int Yap_PlFGetchar (void) { return(PlGetc(Yap_c_input_stream)); } static Term MkStream (int n) { Term t[1]; t[0] = MkIntTerm (n); return (Yap_MkApplTerm (FunctorStream, 1, t)); } /* given a stream index, get the corresponding fd */ static Int GetStreamFd(int sno) { return(YP_fileno(Stream[sno].u.file.file)); } Int Yap_GetStreamFd(int sno) { return GetStreamFd(sno); } /* given a socket file descriptor, get the corresponding stream descripor */ int Yap_CheckIOStream(Term stream, char * error) { int sno = CheckStream(stream, Input_Stream_f|Output_Stream_f, error); UNLOCK(Stream[sno].streamlock); return(sno); } #if _MSC_VER || defined(__MINGW32__) #define SYSTEM_STAT _stat #else #define SYSTEM_STAT stat #endif static Int p_access(void) { Term tname = Deref(ARG1); char *file_name; if (IsVarTerm(tname)) { Yap_Error(INSTANTIATION_ERROR, tname, "access"); return FALSE; } else if (!IsAtomTerm (tname)) { Yap_Error(TYPE_ERROR_ATOM, tname, "access"); return FALSE; } else { #if HAVE_STAT struct SYSTEM_STAT ss; file_name = RepAtom(AtomOfTerm(tname))->StrOfAE; if (SYSTEM_STAT(file_name, &ss) != 0) { /* ignore errors while checking a file */ return FALSE; } return TRUE; #else return FALSE; #endif } } static Int p_exists_directory(void) { Term tname = Deref(ARG1); char *file_name; if (IsVarTerm(tname)) { Yap_Error(INSTANTIATION_ERROR, tname, "exists_directory/1"); return FALSE; } else if (!IsAtomTerm (tname)) { Yap_Error(TYPE_ERROR_ATOM, tname, "exists_directory/1"); return FALSE; } else { #if HAVE_STAT struct SYSTEM_STAT ss; file_name = RepAtom(AtomOfTerm(tname))->StrOfAE; if (SYSTEM_STAT(file_name, &ss) != 0) { /* ignore errors while checking a file */ return FALSE; } return (S_ISDIR(ss.st_mode)); #else return FALSE; #endif } } static Int p_file_expansion (void) { /* '$file_expansion'(+File,-Name) */ Term file_name = Deref(ARG1); /* we know file_name is bound */ if (!IsAtomTerm (file_name)) { PlIOError(TYPE_ERROR_ATOM, file_name, "absolute_file_name/3"); return(FALSE); } if (!Yap_TrueFileName (RepAtom (AtomOfTerm (file_name))->StrOfAE, Yap_FileNameBuf, FALSE)) return (PlIOError (EXISTENCE_ERROR_SOURCE_SINK,file_name,"absolute_file_name/3")); return(Yap_unify(ARG2,MkAtomTerm(Yap_LookupAtom(Yap_FileNameBuf)))); } Term Yap_OpenStream(FILE *fd, char *name, Term file_name, int flags) { Term t; StreamDesc *st; int sno; sno = GetFreeStreamD(); if (sno < 0) return (PlIOError (RESOURCE_ERROR_MAX_STREAMS,TermNil, "new stream not available for open_null_stream/1")); st = &Stream[sno]; st->status = 0; if (flags & YAP_INPUT_STREAM) st->status |= Input_Stream_f; if (flags & YAP_OUTPUT_STREAM) st->status |= Output_Stream_f; if (flags & YAP_APPEND_STREAM) st->status |= Append_Stream_f; /* pipes assume an integer file descriptor, not a FILE *: if (flags & YAP_PIPE_STREAM) st->status |= Pipe_Stream_f; */ if (flags & YAP_TTY_STREAM) st->status |= Tty_Stream_f; if (flags & YAP_POPEN_STREAM) st->status |= Popen_Stream_f; if (flags & YAP_BINARY_STREAM) st->status |= Binary_Stream_f; if (flags & YAP_SEEKABLE_STREAM) st->status |= Seekable_Stream_f; st->charcount = 0; st->linecount = 1; st->u.file.name = Yap_LookupAtom(name); st->u.file.user_name = file_name; st->u.file.file = fd; st->linepos = 0; st->stream_gets = PlGetsFunc(); if (flags & YAP_TTY_STREAM) { st->stream_putc = ConsolePutc; st->stream_wputc = put_wchar; st->stream_getc = ConsoleGetc; } else { st->stream_putc = FilePutc; st->stream_wputc = put_wchar; st->stream_getc = PlGetc; unix_upd_stream_info (st); } st->stream_wgetc = get_wchar; if (CharConversionTable != NULL) st->stream_wgetc_for_read = ISOWGetc; else st->stream_wgetc_for_read = st->stream_wgetc; UNLOCK(st->streamlock); t = MkStream (sno); return t; } static int LookupSWIStream (struct io_stream *swi_s) { int i = 0; while (i < MaxStreams) { LOCK(Stream[i].streamlock); if (Stream[i].status & SWI_Stream_f && Stream[i].u.swi_stream.swi_ptr == swi_s ) { UNLOCK(Stream[i].streamlock); return i; } UNLOCK(Stream[i].streamlock); i++; } i = GetFreeStreamD(); if (i < 0) return i; Stream[i].u.swi_stream.swi_ptr = swi_s; Stream[i].status = SWI_Stream_f|Output_Stream_f|Input_Stream_f|Append_Stream_f|Tty_Stream_f|Promptable_Stream_f; Stream[i].linepos = 0; Stream[i].linecount = 1; Stream[i].charcount = 0; Stream[i].encoding = DefaultEncoding(); Stream[i].stream_getc = IOSWIGetc; Stream[i].stream_putc = IOSWIPutc; Stream[i].stream_wputc = IOSWIWidePutc; Stream[i].stream_wgetc = IOSWIWideGetc; Stream[i].stream_gets = DefaultGets; if (CharConversionTable != NULL) Stream[i].stream_wgetc_for_read = ISOWGetc; else Stream[i].stream_wgetc_for_read = IOSWIWideGetc; UNLOCK(Stream[i].streamlock); return i; } int Yap_LookupSWIStream (void *swi_s) { return LookupSWIStream (swi_s); } typedef struct stream_ref { struct io_stream *read; struct io_stream *write; } stream_ref; extern stream_ref *PL_blob_data(Atom, void *, void *); static int CheckStream (Term arg, int kind, char *msg) { int sno = -1; arg = Deref (arg); if (IsVarTerm (arg)) { Yap_Error(INSTANTIATION_ERROR, arg, msg); return -1; } else if (IsAtomTerm (arg)) { struct io_stream *swi_stream; Atom sname = AtomOfTerm(arg); if (IsBlob(sname)) { struct io_stream *s; stream_ref *ref; ref = PL_blob_data(sname, NULL, NULL); { if ( ref->read ) { if ( ref->write && (kind&Output_Stream_f) ) s = ref->write; else s = ref->read; } else s = ref->write; } sno = LookupSWIStream(s); return sno; } if (Yap_get_stream_handle(arg, kind & Input_Stream_f, kind & Output_Stream_f, &swi_stream)) { sno = LookupSWIStream(swi_stream); return sno; } } if (sno < 0) { Yap_Error(DOMAIN_ERROR_STREAM_OR_ALIAS, arg, msg); return (-1); } LOCK(Stream[sno].streamlock); if (Stream[sno].status & Free_Stream_f) { UNLOCK(Stream[sno].streamlock); Yap_Error(EXISTENCE_ERROR_STREAM, arg, msg); return (-1); } if ((Stream[sno].status & kind) == 0) { UNLOCK(Stream[sno].streamlock); if (kind & Input_Stream_f) Yap_Error(PERMISSION_ERROR_INPUT_STREAM, arg, msg); else Yap_Error(PERMISSION_ERROR_OUTPUT_STREAM, arg, msg); return (-1); } return (sno); } int Yap_CheckStream (Term arg, int kind, char *msg) { return CheckStream(arg, kind, msg); } #if defined(YAPOR) || defined(THREADS) void Yap_LockStream (int sno) { LOCK(Stream[sno].streamlock); } void Yap_UnLockStream (int sno) { UNLOCK(Stream[sno].streamlock); } #endif static Term StreamName(int i) { if (i < 3) return(MkAtomTerm(AtomUser)); return(Stream[i].u.file.user_name); } /* * Called when you want to close all open streams, except for stdin, stdout * and stderr */ void Yap_CloseStreams (int loud) { int sno; for (sno = 3; sno < MaxStreams; ++sno) { if (Stream[sno].status & Free_Stream_f) continue; if ((Stream[sno].status & Popen_Stream_f)) pclose (Stream[sno].u.file.file); else if (Stream[sno].status & (SWI_Stream_f)) { SWIClose(Stream[sno].u.swi_stream.swi_ptr); } else { YP_fclose (Stream[sno].u.file.file); } if (Yap_c_input_stream == sno) { Yap_c_input_stream = StdInStream; } else if (Yap_c_output_stream == sno) { Yap_c_output_stream = StdOutStream; } Stream[sno].status = Free_Stream_f; } } static void CloseStream(int sno) { if (!(Stream[sno].status & (SWI_Stream_f))) { YP_fclose (Stream[sno].u.file.file); } else if (Stream[sno].status & (SWI_Stream_f)) { SWIClose(Stream[sno].u.swi_stream.swi_ptr); } Stream[sno].status = Free_Stream_f; if (Yap_c_input_stream == sno) { Yap_c_input_stream = StdInStream; } else if (Yap_c_output_stream == sno) { Yap_c_output_stream = StdOutStream; } } void Yap_CloseStream(int sno) { CloseStream(sno); } static Int p_close (void) { /* '$close'(+Stream) */ Int sno = CheckStream (ARG1, (Input_Stream_f | Output_Stream_f), "close/2"); if (sno < 0) return (FALSE); if (sno <= StdErrStream) { UNLOCK(Stream[sno].streamlock); return TRUE; } CloseStream(sno); UNLOCK(Stream[sno].streamlock); return (TRUE); } static Int p_past_eof (void) { /* at_end_of_stream */ /* the next character is a EOF */ int sno = CheckStream (ARG1, Input_Stream_f, "past_eof/1"); Int out; if (sno < 0) return (FALSE); if (Stream[sno].stream_getc == PlUnGetc) { UNLOCK(Stream[sno].streamlock); return FALSE; } out = Stream[sno].status & Eof_Stream_f; UNLOCK(Stream[sno].streamlock); return out; } static Int p_has_bom (void) { /* '$set_output'(+Stream,-ErrorMessage) */ Int sno = CheckStream (ARG1, Input_Stream_f|Output_Stream_f, "has_bom/1"); if (sno < 0) return (FALSE); UNLOCK(Stream[sno].streamlock); return ((Stream[sno].status & HAS_BOM_f)); } static Int p_representation_error (void) { /* '$representation_error'(+Stream,-ErrorMessage) */ Term t; Int sno = CheckStream (ARG1, Input_Stream_f|Output_Stream_f, "representation_errors/1"); if (sno < 0) return (FALSE); t = Deref(ARG2); if (IsVarTerm(t)) { UNLOCK(Stream[sno].streamlock); if (Stream[sno].status & RepError_Prolog_f) { return Yap_unify(ARG2, MkIntegerTerm(512)); } if (Stream[sno].status & RepError_Xml_f) { return Yap_unify(ARG2, MkIntegerTerm(1024)); } return Yap_unify(ARG2, MkIntegerTerm(0)); } else { Int i = IntegerOfTerm(t); switch (i) { case 512: Stream[sno].status &= ~RepError_Xml_f; Stream[sno].status |= RepError_Prolog_f; break; case 1024: Stream[sno].status &= ~RepError_Prolog_f; Stream[sno].status |= RepError_Xml_f; default: Stream[sno].status &= ~(RepError_Prolog_f|RepError_Xml_f); } } UNLOCK(Stream[sno].streamlock); return TRUE; } #ifdef BEAM int beam_write (void) { Yap_StartSlots(); Yap_plwrite (ARG1, Stream[Yap_c_output_stream].stream_wputc, 0, 1200); Yap_CloseSlots(); if (EX != 0L) { Term ball = Yap_PopTermFromDB(EX); EX = 0L; Yap_JumpToEnv(ball); return(FALSE); } return (TRUE); } #endif static Int p_write (void) { /* '$write'(+Flags,?Term) */ int flags = (int) IntOfTerm (Deref (ARG1)); /* notice: we must have ASP well set when using portray, otherwise we cannot make recursive Prolog calls */ Yap_StartSlots(); Yap_plwrite (ARG2, Stream[Yap_c_output_stream].stream_wputc, flags, 1200); Yap_CloseSlots(); if (EX != 0L) { Term ball = Yap_PopTermFromDB(EX); EX = NULL; Yap_JumpToEnv(ball); return(FALSE); } return (TRUE); } static Int p_write_prio (void) { /* '$write'(+Flags,?Term) */ int flags = (int) IntOfTerm (Deref (ARG1)); /* notice: we must have ASP well set when using portray, otherwise we cannot make recursive Prolog calls */ Yap_StartSlots(); Yap_plwrite (ARG3, Stream[Yap_c_output_stream].stream_wputc, flags, (int)IntOfTerm(Deref(ARG2))); Yap_CloseSlots(); if (EX != 0L) { Term ball = Yap_PopTermFromDB(EX); EX = NULL; Yap_JumpToEnv(ball); return(FALSE); } return (TRUE); } static Int p_write2_prio (void) { /* '$write'(+Stream,+Flags,?Term) */ int old_output_stream = Yap_c_output_stream; Int flags = IntegerOfTerm(Deref(ARG2)); int stream_f; if (flags & Use_SWI_Stream_f) { stream_f = Output_Stream_f|SWI_Stream_f; } else { stream_f = Output_Stream_f; } Yap_c_output_stream = CheckStream (ARG1, stream_f, "write/2"); if (Yap_c_output_stream == -1) { Yap_c_output_stream = old_output_stream; return(FALSE); } UNLOCK(Stream[Yap_c_output_stream].streamlock); /* notice: we must have ASP well set when using portray, otherwise we cannot make recursive Prolog calls */ Yap_StartSlots(); Yap_plwrite (ARG4, Stream[Yap_c_output_stream].stream_wputc, (int) flags, (int) IntOfTerm (Deref (ARG3))); Yap_CloseSlots(); Yap_c_output_stream = old_output_stream; if (EX != 0L) { Term ball = Yap_PopTermFromDB(EX); EX = NULL; Yap_JumpToEnv(ball); return(FALSE); } return (TRUE); } static Int p_write2 (void) { /* '$write'(+Stream,+Flags,?Term) */ int old_output_stream = Yap_c_output_stream; Yap_c_output_stream = CheckStream (ARG1, Output_Stream_f, "write/2"); if (Yap_c_output_stream == -1) { Yap_c_output_stream = old_output_stream; return(FALSE); } UNLOCK(Stream[Yap_c_output_stream].streamlock); /* notice: we must have ASP well set when using portray, otherwise we cannot make recursive Prolog calls */ Yap_StartSlots(); Yap_plwrite (ARG3, Stream[Yap_c_output_stream].stream_wputc, (int) IntOfTerm (Deref (ARG2)), 1200); Yap_CloseSlots(); Yap_c_output_stream = old_output_stream; if (EX != 0L) { Term ball = Yap_PopTermFromDB(EX); EX = NULL; Yap_JumpToEnv(ball); return(FALSE); } return (TRUE); } static void clean_vars(VarEntry *p) { if (p == NULL) return; p->VarAdr = TermNil; clean_vars(p->VarLeft); clean_vars(p->VarRight); } static Term syntax_error (TokEntry * tokptr, int sno, Term *outp) { Term info; int count = 0, out = 0; Int start, err = 0, end; Term tf[7]; Term *error = tf+3; CELL *Hi = H; /* make sure to globalise variable */ Yap_unify(*outp, MkVarTerm()); start = tokptr->TokPos; clean_vars(Yap_VarTable); clean_vars(Yap_AnonVarTable); while (1) { Term ts[2]; if (H > ASP-1024) { tf[3] = TermNil; err = 0; end = 0; /* for some reason moving this earlier confuses gcc on solaris */ H = Hi; break; } if (tokptr == Yap_toktide) { err = tokptr->TokPos; out = count; } info = tokptr->TokInfo; switch (tokptr->Tok) { case Name_tok: { Term t0[1]; t0[0] = MkAtomTerm((Atom)info); ts[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomAtom,1),1,t0); } break; case Number_tok: ts[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomNumber,1),1,&(tokptr->TokInfo)); break; case Var_tok: { Term t[3]; VarEntry *varinfo = (VarEntry *)info; t[0] = MkIntTerm(0); t[1] = Yap_StringToList(varinfo->VarRep); if (varinfo->VarAdr == TermNil) { t[2] = varinfo->VarAdr = MkVarTerm(); } else { t[2] = varinfo->VarAdr; } ts[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomGVar,3),3,t); } break; case String_tok: { Term t0 = Yap_StringToList((char *)info); ts[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomString,1),1,&t0); } break; case WString_tok: { Term t0 = Yap_WideStringToList((wchar_t *)info); ts[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomString,1),1,&t0); } break; case Error_tok: case eot_tok: break; case Ponctuation_tok: { char s[2]; s[1] = '\0'; if (Ord (info) == 'l') { s[0] = '('; } else { s[0] = (char)info; } ts[0] = MkAtomTerm(Yap_LookupAtom(s)); } } if (tokptr->Tok == Ord (eot_tok)) { *error = TermNil; end = tokptr->TokPos; break; } else if (tokptr->Tok != Ord (Error_tok)) { ts[1] = MkIntegerTerm(tokptr->TokPos); *error = MkPairTerm(Yap_MkApplTerm(FunctorMinus,2,ts),TermNil); error = RepPair(*error)+1; count++; } tokptr = tokptr->TokNext; } if (IsVarTerm(*outp) && (VarOfTerm(*outp) > H || VarOfTerm(*outp) < H0)) { tf[0] = Yap_MkNewApplTerm(Yap_MkFunctor(AtomRead,1),1); } else { tf[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomRead,1),1,outp); } { Term t[3]; t[0] = MkIntegerTerm(start); t[1] = MkIntegerTerm(err); t[2] = MkIntegerTerm(end); tf[1] = Yap_MkApplTerm(Yap_MkFunctor(AtomBetween,3),3,t); } tf[2] = MkAtomTerm(AtomHERE); tf[4] = MkIntegerTerm(out); tf[5] = MkIntegerTerm(err); tf[6] = StreamName(sno); return(Yap_MkApplTerm(FunctorSyntaxError,7,tf)); } Int Yap_FirstLineInParse (void) { return StartLine; } static Int p_startline (void) { return (Yap_unify_constant (ARG1, MkIntegerTerm (StartLine))); } /* control the parser error handler */ static Int p_set_read_error_handler(void) { Term t = Deref(ARG1); char *s; if (IsVarTerm(t)) { Yap_Error(INSTANTIATION_ERROR,t,"set_read_error_handler"); return(FALSE); } if (!IsAtomTerm(t)) { Yap_Error(TYPE_ERROR_ATOM,t,"bad syntax_error handler"); return(FALSE); } s = RepAtom(AtomOfTerm(t))->StrOfAE; if (!strcmp(s, "fail")) { ParserErrorStyle = FAIL_ON_PARSER_ERROR; } else if (!strcmp(s, "error")) { ParserErrorStyle = EXCEPTION_ON_PARSER_ERROR; } else if (!strcmp(s, "quiet")) { ParserErrorStyle = QUIET_ON_PARSER_ERROR; } else if (!strcmp(s, "dec10")) { ParserErrorStyle = CONTINUE_ON_PARSER_ERROR; } else { Yap_Error(DOMAIN_ERROR_SYNTAX_ERROR_HANDLER,t,"bad syntax_error handler"); return(FALSE); } return(TRUE); } /* return the status for the parser error handler */ static Int p_get_read_error_handler(void) { Term t; switch (ParserErrorStyle) { case FAIL_ON_PARSER_ERROR: t = MkAtomTerm(AtomFail); break; case EXCEPTION_ON_PARSER_ERROR: t = MkAtomTerm(AtomError); break; case QUIET_ON_PARSER_ERROR: t = MkAtomTerm(AtomQuiet); break; case CONTINUE_ON_PARSER_ERROR: t = MkAtomTerm(AtomDec10); break; default: Yap_Error(SYSTEM_ERROR,TermNil,"corrupted syntax_error handler"); return(FALSE); } return (Yap_unify_constant (ARG1, t)); } int Yap_readTerm(int sno, Term *tp, Term *varnames, Term *terror, Term *tpos) { TokEntry *tokstart; Term pt; if (sno < 0) { return FALSE; } tokstart = Yap_tokptr = Yap_toktide = Yap_tokenizer(sno, tpos); if (Yap_ErrorMessage) { Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable); if (terror) *terror = MkAtomTerm(Yap_LookupAtom(Yap_ErrorMessage)); Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable); return FALSE; } pt = Yap_Parse(); if (Yap_ErrorMessage) { Term t0 = MkVarTerm(); *terror = syntax_error(tokstart, sno, &t0); Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable); return FALSE; } if (varnames) { *varnames = Yap_VarNames(Yap_VarTable, TermNil); if (!*varnames) { Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable); return FALSE; } } *tp = pt; return TRUE; } /* Assumes Flag: ARG1 Term: ARG2 Module: ARG3 Vars: ARG4 Pos: ARG5 Err: ARG6 */ static Int do_read(int inp_stream, int nargs) { Term t, v; TokEntry *tokstart; #if EMACS int emacs_cares = FALSE; #endif Term tmod = Deref(ARG3), OCurrentModule = CurrentModule, tpos; if (IsVarTerm(tmod)) { tmod = CurrentModule; } else if (!IsAtomTerm(tmod)) { Yap_Error(TYPE_ERROR_ATOM, tmod, "read_term/2"); return FALSE; } if (Stream[inp_stream].status & Binary_Stream_f) { Yap_Error(PERMISSION_ERROR_INPUT_BINARY_STREAM, MkAtomTerm(Stream[inp_stream].u.file.name), "read_term/2"); return FALSE; } Yap_Error_TYPE = YAP_NO_ERROR; tpos = StreamPosition(inp_stream); if (!Yap_unify(tpos,ARG5)) { /* do this early so that we do not have to protect it in case of stack expansion */ return FALSE; } while (TRUE) { CELL *old_H; UInt cpos = 0; int seekable = Stream[inp_stream].status & Seekable_Stream_f; #if HAVE_FGETPOS fpos_t rpos; #endif int ungetc_oldc = 0; int had_ungetc = FALSE; /* two cases where we can seek: memory and console */ if (seekable) { if (Stream[inp_stream].stream_getc == PlUnGetc) { had_ungetc = TRUE; ungetc_oldc = Stream[inp_stream].och; } cpos = Stream[inp_stream].charcount; } /* Scans the term using stack space */ while (TRUE) { old_H = H; Yap_eot_before_eof = FALSE; tpos = StreamPosition(inp_stream); tokstart = Yap_tokptr = Yap_toktide = Yap_tokenizer(inp_stream, &tpos); if (Yap_Error_TYPE != YAP_NO_ERROR && seekable) { H = old_H; Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable); if (had_ungetc) { Stream[inp_stream].stream_getc = PlUnGetc; Stream[inp_stream].och = ungetc_oldc; } if (seekable) { if (Stream[inp_stream].status) { #if HAVE_FGETPOS fsetpos(Stream[inp_stream].u.file.file, &rpos); #else fseek(Stream[inp_stream].u.file.file, cpos, 0L); #endif } } if (Yap_Error_TYPE == OUT_OF_TRAIL_ERROR) { Yap_Error_TYPE = YAP_NO_ERROR; if (!Yap_growtrail (sizeof(CELL) * K16, FALSE)) { return FALSE; } } else if (Yap_Error_TYPE == OUT_OF_AUXSPACE_ERROR) { Yap_Error_TYPE = YAP_NO_ERROR; if (!Yap_ExpandPreAllocCodeSpace(0, NULL, TRUE)) { return FALSE; } } else if (Yap_Error_TYPE == OUT_OF_HEAP_ERROR) { Yap_Error_TYPE = YAP_NO_ERROR; if (!Yap_growheap(FALSE, 0, NULL)) { return FALSE; } } else if (Yap_Error_TYPE == OUT_OF_STACK_ERROR) { Yap_Error_TYPE = YAP_NO_ERROR; if (!Yap_gcl(Yap_Error_Size, nargs, ENV, CP)) { return FALSE; } } } else { /* done with this */ break; } } Yap_Error_TYPE = YAP_NO_ERROR; /* preserve value of H after scanning: otherwise we may lose strings and floats */ old_H = H; if (Stream[inp_stream].status & Eof_Stream_f) { if (Yap_eot_before_eof) { /* next read should give out an end of file */ Stream[inp_stream].status |= Push_Eof_Stream_f; } else { if (tokstart != NULL && tokstart->Tok != Ord (eot_tok)) { /* we got the end of file from an abort */ if (Yap_ErrorMessage && !strcmp(Yap_ErrorMessage,"Abort")) { Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable); return FALSE; } /* we need to force the next reading to also give end of file.*/ Stream[inp_stream].status |= Push_Eof_Stream_f; Yap_ErrorMessage = "end of file found before end of term"; } else { Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable); return Yap_unify_constant(ARG2, MkAtomTerm (AtomEof)) && Yap_unify_constant(ARG4, TermNil); } } } repeat_cycle: CurrentModule = tmod; if (Yap_ErrorMessage || (t = Yap_Parse()) == 0) { CurrentModule = OCurrentModule; if (Yap_ErrorMessage) { int res; if (!strcmp(Yap_ErrorMessage,"Stack Overflow") || !strcmp(Yap_ErrorMessage,"Trail Overflow") || !strcmp(Yap_ErrorMessage,"Heap Overflow")) { /* ignore term we just built */ tr_fr_ptr old_TR = TR; H = old_H; TR = (tr_fr_ptr)ScannerStack; if (!strcmp(Yap_ErrorMessage,"Stack Overflow")) res = Yap_growstack_in_parser(&old_TR, &tokstart, &Yap_VarTable); else if (!strcmp(Yap_ErrorMessage,"Heap Overflow")) res = Yap_growheap_in_parser(&old_TR, &tokstart, &Yap_VarTable); else res = Yap_growtrail_in_parser(&old_TR, &tokstart, &Yap_VarTable); if (res) { ScannerStack = (char *)TR; TR = old_TR; old_H = H; Yap_tokptr = Yap_toktide = tokstart; Yap_ErrorMessage = NULL; goto repeat_cycle; } ScannerStack = (char *)TR; TR = old_TR; } } if (ParserErrorStyle == QUIET_ON_PARSER_ERROR) { /* just fail */ Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable); return FALSE; } else if (ParserErrorStyle == CONTINUE_ON_PARSER_ERROR) { Yap_ErrorMessage = NULL; /* try again */ goto repeat_cycle; } else { Term terr = syntax_error(tokstart, inp_stream, &ARG2); if (Yap_ErrorMessage == NULL) Yap_ErrorMessage = "SYNTAX ERROR"; if (ParserErrorStyle == EXCEPTION_ON_PARSER_ERROR) { Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable); Yap_Error(SYNTAX_ERROR,terr,Yap_ErrorMessage); return FALSE; } else /* FAIL ON PARSER ERROR */ { Term t[2]; t[0] = terr; t[1] = MkAtomTerm(Yap_LookupAtom(Yap_ErrorMessage)); Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable); return Yap_unify(ARG6,Yap_MkApplTerm(Yap_MkFunctor(AtomError,2),2,t)); } } } else { CurrentModule = OCurrentModule; /* parsing succeeded */ break; } } #if EMACS first_char = tokstart->TokPos; #endif /* EMACS */ if (!Yap_unify(t, ARG2)) return FALSE; if (AtomOfTerm (Deref (ARG1)) == AtomTrue) { while (TRUE) { CELL *old_H = H; if (setjmp(Yap_IOBotch) == 0) { v = Yap_VarNames(Yap_VarTable, TermNil); break; } else { tr_fr_ptr old_TR; restore_machine_regs(); old_TR = TR; /* restart global */ H = old_H; TR = (tr_fr_ptr)ScannerStack; Yap_growstack_in_parser(&old_TR, &tokstart, &Yap_VarTable); ScannerStack = (char *)TR; TR = old_TR; } } Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable); return Yap_unify (v, ARG4); } else { Yap_clean_tokenizer(tokstart, Yap_VarTable, Yap_AnonVarTable); return TRUE; } } static Int p_read (void) { /* '$read'(+Flag,?Term,?Module,?Vars,-Pos,-Err) */ return do_read(Yap_c_input_stream, 6); } static Int p_read2 (void) { /* '$read2'(+Flag,?Term,?Module,?Vars,-Pos,-Err,+Stream) */ int inp_stream; Int out; /* needs to change Yap_c_output_stream for write */ inp_stream = CheckStream (ARG7, Input_Stream_f, "read/3"); if (inp_stream == -1) { return(FALSE); } UNLOCK(Stream[inp_stream].streamlock); out = do_read(inp_stream, 7); return out; } static Int p_user_file_name (void) { Term tout; int sno = CheckStream (ARG1, Input_Stream_f | Output_Stream_f | Append_Stream_f,"user_file_name/2"); if (sno < 0) return (FALSE); tout = Stream[sno].u.file.user_name; UNLOCK(Stream[sno].streamlock); return (Yap_unify_constant (ARG2, tout)); } static Term StreamPosition(int sno) { return TermNil; } Term Yap_StreamPosition(int sno) { return StreamPosition(sno); } static Term read_line(int sno) { Term tail; Int ch; if ((ch = Stream[sno].stream_wgetc(sno)) == 10) { return(TermNil); } tail = read_line(sno); return(MkPairTerm(MkIntTerm(ch),tail)); } static Int p_get0_line_codes (void) { /* '$get0'(Stream,-N) */ int sno = CheckStream (ARG1, Input_Stream_f, "get0/2"); Int status; Term out; Int ch = '\0'; int rewind; if (sno < 0) return(FALSE); if (Stream[sno].stream_getc == PlUnGetc) { ch = PlUnGetc(sno); rewind = TRUE; } else { rewind = FALSE; } status = Stream[sno].status; if (status & Binary_Stream_f) { UNLOCK(Stream[sno].streamlock); Yap_Error(PERMISSION_ERROR_INPUT_BINARY_STREAM, ARG1, "get0/2"); return FALSE; } UNLOCK(Stream[sno].streamlock); out = read_line(sno); if (rewind) return Yap_unify(MkPairTerm(MkIntegerTerm(ch),out), ARG2); else return Yap_unify(out,ARG2); } #define FORMAT_MAX_SIZE 256 typedef struct { Int pos; /* tab point */ char pad; /* ok, it's not standard english */ } pads; typedef struct format_status { int format_error; char *format_ptr, *format_base, *format_max; int format_buf_size; pads pad_entries[16], *pad_max; } format_info; static int format_putc(int sno, wchar_t ch) { if (FormatInfo->format_buf_size == -1) return EOF; if (ch == 10) { char *ptr = FormatInfo->format_base; #if MAC || _MSC_VER ch = '\n'; #endif for (ptr = FormatInfo->format_base; ptr < FormatInfo->format_ptr; ptr++) { Stream[sno].stream_putc(sno, *ptr); } /* reset line */ FormatInfo->format_ptr = FormatInfo->format_base; FormatInfo->pad_max = FormatInfo->pad_entries; Stream[sno].stream_putc(sno, '\n'); return((int)10); } else { *FormatInfo->format_ptr++ = (char)ch; if (FormatInfo->format_ptr == FormatInfo->format_max) { /* oops, we have reached an overflow */ Int new_max_size = FormatInfo->format_buf_size + FORMAT_MAX_SIZE; char *newbuf; if ((newbuf = Yap_AllocAtomSpace(new_max_size*sizeof(char))) == NULL) { FormatInfo->format_buf_size = -1; Yap_Error(SYSTEM_ERROR, TermNil, "YAP could not grow heap for format/2"); return(EOF); } #if HAVE_MEMMOVE memmove((void *)newbuf, (void *)FormatInfo->format_base, (size_t)((FormatInfo->format_ptr-FormatInfo->format_base)*sizeof(char))); #else { Int n = FormatInfo->format_ptr-FormatInfo->format_base; char *to = newbuf; char *from = FormatInfo->format_base; while (n-- >= 0) { *to++ = *from++; } } #endif Yap_FreeAtomSpace(FormatInfo->format_base); FormatInfo->format_ptr = newbuf+(FormatInfo->format_ptr-FormatInfo->format_base); FormatInfo->format_base = newbuf; FormatInfo->format_max = newbuf+new_max_size; FormatInfo->format_buf_size = new_max_size; if (ActiveSignals & YAP_CDOVF_SIGNAL) { if (!Yap_growheap(FALSE, 0, NULL)) { Yap_Error(OUT_OF_HEAP_ERROR, TermNil, "YAP failed to grow heap at format"); } } } } return ((int) ch); } static void fill_pads(int nchars) { int nfillers, fill_space, lfill_space; if (nchars <= 0) return; /* ignore */ nfillers = FormatInfo->pad_max-FormatInfo->pad_entries; if (nfillers == 0) { /* OK, just pad with spaces */ while (nchars--) { *FormatInfo->format_ptr++ = ' '; } return; } fill_space = nchars/nfillers; lfill_space = nchars%nfillers; if (fill_space) { pads *padi = FormatInfo->pad_max; while (padi > FormatInfo->pad_entries) { char *start_pos; int n, i; padi--; start_pos = FormatInfo->format_base+padi->pos; n = FormatInfo->format_ptr-start_pos; #if HAVE_MEMMOVE memmove((void *)(start_pos+fill_space), (void *)start_pos, (size_t)(n*sizeof(char))); #else { char *to = start_pos+(fill_space+n); char *from = FormatInfo->format_ptr; while (n-- > 0) { *--to = *--from; } } #endif FormatInfo->format_ptr += fill_space; for (i = 0; i < fill_space; i++) { *start_pos++ = padi->pad; } } } while (lfill_space--) { *FormatInfo->format_ptr++ = FormatInfo->pad_max[-1].pad; } } static int format_print_str (Int sno, Int size, Int has_size, Term args, int (* f_putc)(int, wchar_t)) { Term arghd; while (!has_size || size > 0) { if (IsVarTerm(args)) { Yap_Error(INSTANTIATION_ERROR, args, "format/2"); return FALSE; } else if (args == TermNil) { return TRUE; } else if (!IsPairTerm (args)) { Yap_Error(TYPE_ERROR_LIST, args, "format/2"); return FALSE; } arghd = HeadOfTerm (args); args = TailOfTerm (args); if (IsVarTerm(arghd)) { Yap_Error(INSTANTIATION_ERROR, arghd, "format/2"); return FALSE; } else if (!IsIntTerm (arghd)) { Yap_Error(TYPE_ERROR_LIST, arghd, "format/2"); return FALSE; } f_putc(sno, (int) IntOfTerm (arghd)); size--; } return TRUE; } typedef enum { fst_ok, fst_error, fst_too_long } format_cp_res; static format_cp_res copy_format_string(Term inp, char *out, int max) { int i = 0; while (inp != TermNil) { Term hd; int ch; if (IsVarTerm(inp)) { Yap_Error(INSTANTIATION_ERROR,inp,"format/2"); return fst_error; } if (!IsPairTerm(inp)) { Yap_Error(TYPE_ERROR_LIST,inp,"format/2"); return fst_error; } hd = HeadOfTerm(inp); if (IsVarTerm(hd)) { Yap_Error(INSTANTIATION_ERROR,hd,"format/2"); return fst_error; } if (!IsIntTerm(hd)) { Yap_Error(TYPE_ERROR_INTEGER,hd,"format/2"); return fst_error; } ch = IntOfTerm(hd); if (ch < 0) { Yap_Error(DOMAIN_ERROR_NOT_LESS_THAN_ZERO,hd,"format/2"); return fst_error; } if (i+1 == max) { return fst_too_long; } /* we've got a character */ out[i++] = ch; /* done */ inp = TailOfTerm(inp); } out[i] = '\0'; return fst_ok; } #define FORMAT_COPY_ARGS_ERROR -1 #define FORMAT_COPY_ARGS_OVERFLOW -2 static Int format_copy_args(Term args, Term *targs, Int tsz) { Int n = 0; while (args != TermNil) { if (IsVarTerm(args)) { Yap_Error(INSTANTIATION_ERROR,args,"format/2"); return FORMAT_COPY_ARGS_ERROR; } if (!IsPairTerm(args)) { Yap_Error(TYPE_ERROR_LIST,args,"format/2"); return FORMAT_COPY_ARGS_ERROR; } if (n == tsz) return FORMAT_COPY_ARGS_OVERFLOW; targs[n] = HeadOfTerm(args); args = TailOfTerm(args); n++; } return n; } static void format_clean_up(char *format_base, char *fstr, Term *targs) { if (format_base) Yap_FreeAtomSpace(format_base); if (fstr) Yap_FreeAtomSpace(fstr); if (targs) Yap_FreeAtomSpace((char *)targs); } static Int fetch_index_from_args(Term t) { Int i; if (IsVarTerm(t)) return -1; if (!IsIntegerTerm(t)) return -1; i = IntegerOfTerm(t); if (i < 0) return -1; return i; } static int format_has_tabs(const char *seq) { int ch; while ((ch = *seq++)) { if (ch == '~') { ch = *seq++; if (ch == 'p' || ch == '@') { return TRUE; } if (ch == '*') { ch = *seq++; } else { while (ch >= '0' && ch <= '9') ch = *seq++; } if (ch == 't' || ch == '|' || ch == '+') { return TRUE; } if (!ch) return FALSE; } } return FALSE; } static wchar_t base_dig(Int dig, Int ch) { if (dig < 10) return dig+'0'; else if (ch == 'r') return (dig-10)+'a'; else /* ch == 'R' */ return (dig-10)+'A'; } #define TMP_STRING_SIZE 1024 static Int format(volatile Term otail, volatile Term oargs, int sno) { char tmp1[TMP_STRING_SIZE], *tmpbase; int ch; int column_boundary; Term mytargs[8], *targs; Int tnum, targ; char *fstr = NULL, *fptr; Term args; Term tail; int (* f_putc)(int, wchar_t); int has_tabs; volatile void *old_handler; format_info finfo; Term fmod = CurrentModule; FormatInfo = &finfo; finfo.pad_max = finfo.pad_entries; finfo.format_error = FALSE; old_handler = NULL; args = oargs; tail = otail; targ = 0; column_boundary = 0; if (IsVarTerm(tail)) { Yap_Error(INSTANTIATION_ERROR,tail,"format/2"); return(FALSE); } else if (IsPairTerm (tail)) { int sz = 256; do { format_cp_res fr; fstr = fptr = Yap_AllocAtomSpace(sz*sizeof(char)); if ((fr = copy_format_string(tail, fstr, sz)) == fst_ok) break; if (fr == fst_error) return FALSE; sz += 256; Yap_FreeCodeSpace(fstr); } while (TRUE); } else if (IsAtomTerm(tail)) { fstr = fptr = RepAtom(AtomOfTerm(tail))->StrOfAE; } else { Yap_Error(CONSISTENCY_ERROR, tail, "format/2"); return FALSE; } if (IsVarTerm(args)) { Yap_Error(INSTANTIATION_ERROR, args, "format/2"); return FALSE; } while (IsApplTerm(args) && FunctorOfTerm(args) == FunctorModule) { fmod = ArgOfTerm(1,args); args = ArgOfTerm(2,args); if (IsVarTerm(fmod)) { Yap_Error(INSTANTIATION_ERROR, fmod, "format/2"); return FALSE; } if (!IsAtomTerm(fmod)) { Yap_Error(TYPE_ERROR_ATOM, fmod, "format/2"); return FALSE; } if (IsVarTerm(args)) { Yap_Error(INSTANTIATION_ERROR, args, "format/2"); return FALSE; } } if (IsPairTerm(args)) { Int tsz = 8; targs = mytargs; do { tnum = format_copy_args(args, targs, tsz); if (tnum == FORMAT_COPY_ARGS_ERROR) return FALSE; else if (tnum == FORMAT_COPY_ARGS_OVERFLOW) { if (mytargs != targs) { Yap_FreeCodeSpace((char *)targs); } tsz += 16; targs = (Term *)Yap_AllocAtomSpace(tsz*sizeof(Term)); } else { break; } } while (TRUE); } else if (args != TermNil) { tnum = 1; mytargs[0] = args; targs = mytargs; } else { tnum = 0; targs = mytargs; } finfo.format_error = FALSE; if ((has_tabs = format_has_tabs(fptr))) { finfo.format_base = finfo.format_ptr = Yap_AllocAtomSpace(FORMAT_MAX_SIZE*sizeof(char)); finfo.format_max = finfo.format_base+FORMAT_MAX_SIZE; if (finfo.format_ptr == NULL) { Yap_Error(INSTANTIATION_ERROR,tail,"format/2"); return(FALSE); } finfo.format_buf_size = FORMAT_MAX_SIZE; f_putc = format_putc; } else { f_putc = Stream[sno].stream_wputc; finfo.format_base = NULL; } while ((ch = *fptr++)) { Term t = TermNil; int has_repeats = FALSE; int repeats = 0; if (ch == '~') { /* start command */ ch = *fptr++; if (ch == '*') { ch = *fptr++; has_repeats = TRUE; if (targ > tnum-1) { goto do_consistency_error; } repeats = fetch_index_from_args(targs[targ++]); if (repeats == -1) goto do_consistency_error; } else if (ch == '`') { /* next character is kept as code */ has_repeats = TRUE; repeats = *fptr++; ch = *fptr++; } else if (ch >= '0' && ch <= '9') { has_repeats = TRUE; repeats = 0; while (ch >= '0' && ch <= '9') { repeats = repeats*10+(ch-'0'); ch = *fptr++; } } switch (ch) { case 'a': /* print an atom */ if (has_repeats || targ > tnum-1) goto do_consistency_error; t = targs[targ++]; if (IsVarTerm(t)) goto do_instantiation_error; if (!IsAtomTerm(t)) goto do_type_atom_error; Yap_StartSlots(); Yap_plwrite (t, f_putc, Handle_vars_f|To_heap_f, 1200); Yap_CloseSlots(); FormatInfo = &finfo; break; case 'c': { Int nch, i; if (targ > tnum-1) goto do_consistency_error; t = targs[targ++]; if (IsVarTerm(t)) goto do_instantiation_error; if (!IsIntegerTerm(t)) goto do_type_int_error; nch = IntegerOfTerm(t); if (nch < 0) goto do_domain_not_less_zero_error; if (!has_repeats) repeats = 1; for (i = 0; i < repeats; i++) f_putc(sno, nch); break; } case 'e': case 'E': case 'f': case 'g': case 'G': { Float fl; char *ptr; if (targ > tnum-1) goto do_consistency_error; t = targs[targ++]; if (IsVarTerm(t)) goto do_instantiation_error; if (!IsNumTerm(t)) goto do_type_number_error; if (IsIntegerTerm(t)) { fl = (Float)IntegerOfTerm(t); #ifdef USE_GMP } else if (IsBigIntTerm(t)) { fl = Yap_gmp_to_float(t); #endif } else { fl = FloatOfTerm(t); } if (!has_repeats) repeats = 6; tmp1[0] = '%'; tmp1[1] = '.'; ptr = tmp1+2; #if HAVE_SNPRINTF snprintf(ptr,256-5,"%d",repeats); #else sprintf(ptr,"%d",repeats); #endif while (*ptr) ptr++; ptr[0] = ch; ptr[1] = '\0'; { char *tmp2; if (!(tmp2 = Yap_AllocCodeSpace(repeats+10))) goto do_type_int_error; #if HAVE_SNPRINTF snprintf (tmp2, repeats+10, tmp1, fl); #else sprintf (tmp2, tmp1, fl); #endif ptr = tmp2; while ((ch = *ptr++) != 0) f_putc(sno, ch); Yap_FreeCodeSpace(tmp2); } break; case 'd': case 'D': /* print a decimal, using weird . stuff */ if (targ > tnum-1) goto do_consistency_error; t = targs[targ++]; if (IsVarTerm(t)) goto do_instantiation_error; if (!IsIntegerTerm(t) #ifdef USE_GMP && !IsBigIntTerm(t) #endif ) goto do_type_int_error; { Int siz = 0; char *ptr = tmp1; tmpbase = tmp1; if (IsIntegerTerm(t)) { Int il = IntegerOfTerm(t); #if HAVE_SNPRINTF snprintf(tmp1, 256, "%ld", (long int)il); #else sprintf(tmp1, "%ld", (long int)il); #endif siz = strlen(tmp1); if (il < 0) siz--; #ifdef USE_GMP } else if (IsBigIntTerm(t) && RepAppl(t)[1] == BIG_INT) { char *res; tmpbase = tmp1; while (!(res = Yap_gmp_to_string(t, tmpbase, TMP_STRING_SIZE, 10))) { if (tmpbase == tmp1) { tmpbase = NULL; } else { tmpbase = res; goto do_type_int_error; } } tmpbase = res; ptr = tmpbase; #endif siz = strlen(tmpbase); } else { goto do_type_int_error; } if (tmpbase[0] == '-') { f_putc(sno, (int) '-'); ptr++; } if (ch == 'D') { int first = TRUE; while (siz > repeats) { if ((siz-repeats) % 3 == 0 && !first) { f_putc(sno, (int) ','); } f_putc(sno, (int) (*ptr++)); first = FALSE; siz--; } } else { while (siz > repeats) { f_putc(sno, (int) (*ptr++)); siz--; } } if (repeats) { if (ptr == tmpbase || ptr[-1] == '-') { f_putc(sno, (int) '0'); } f_putc(sno, (int) '.'); while (repeats > siz) { f_putc(sno, (int) '0'); repeats--; } while (repeats) { f_putc(sno, (int) (*ptr++)); repeats--; } } if (tmpbase != tmp1) free(tmpbase); break; case 'r': case 'R': { Int numb, radix; UInt divfactor = 1, size = 1, i; wchar_t och; /* print a decimal, using weird . stuff */ if (targ > tnum-1) goto do_consistency_error; t = targs[targ++]; if (IsVarTerm(t)) goto do_instantiation_error; if (!has_repeats) radix = 8; else radix = repeats; if (radix > 36 || radix < 2) goto do_domain_error_radix; #ifdef USE_GMP if (IsBigIntTerm(t) && RepAppl(t)[1] == BIG_INT) { char *pt, *res; tmpbase = tmp1; while (!(res = Yap_gmp_to_string(t, tmpbase, TMP_STRING_SIZE, radix))) { if (tmpbase == tmp1) { tmpbase = NULL; } else { tmpbase = res; goto do_type_int_error; } } tmpbase = res; pt = tmpbase; while ((ch = *pt++)) f_putc(sno, ch); if (tmpbase != tmp1) free(tmpbase); break; } #endif if (!IsIntegerTerm(t)) goto do_type_int_error; numb = IntegerOfTerm(t); if (numb < 0) { numb = -numb; f_putc(sno, (int) '-'); } while (numb/divfactor >= radix) { divfactor *= radix; size++; } for (i = 1; i < size; i++) { Int dig = numb/divfactor; och = base_dig(dig, ch); f_putc(sno, och); numb %= divfactor; divfactor /= radix; } och = base_dig(numb, ch); f_putc(sno, och); break; } case 's': if (targ > tnum-1) goto do_consistency_error; t = targs[targ++]; if (!format_print_str (sno, repeats, has_repeats, t, f_putc)) { goto do_default_error; } break; case 'i': if (targ > tnum-1 || has_repeats) goto do_consistency_error; targ++; break; case 'k': if (targ > tnum-1 || has_repeats) goto do_consistency_error; t = targs[targ++]; Yap_StartSlots(); Yap_plwrite (t, f_putc, Quote_illegal_f|Ignore_ops_f|To_heap_f , 1200); Yap_CloseSlots(); FormatInfo = &finfo; break; case '@': t = targs[targ++]; Yap_StartSlots(); { Int sl = Yap_InitSlot(args); Int sl2; Int res; Term ta[2]; Term ts; ta[0] = fmod; ta[1] = t; ta[0] = Yap_MkApplTerm(FunctorModule, 2, ta); ta[1] = MkVarTerm(); sl2 = Yap_InitSlot(ta[1]); ts = Yap_MkApplTerm(FunctorGFormatAt, 2, ta); res = Yap_execute_goal(ts, 0, CurrentModule); FormatInfo = &finfo; args = Yap_GetFromSlot(sl); if (EX) goto ex_handler; if (!res) return FALSE; ts = Yap_GetFromSlot(sl2); Yap_RecoverSlots(2); if (!format_print_str (sno, repeats, has_repeats, ts, f_putc)) { goto do_default_error; } } Yap_CloseSlots(); break; case 'p': if (targ > tnum-1 || has_repeats) goto do_consistency_error; t = targs[targ++]; Yap_StartSlots(); { Int sl = Yap_InitSlot(args); Yap_plwrite(t, f_putc, Handle_vars_f|Use_portray_f|To_heap_f, 1200); FormatInfo = &finfo; args = Yap_GetFromSlot(sl); Yap_RecoverSlots(1); } Yap_CloseSlots(); if (EX != 0L) { Term ball; ex_handler: ball = Yap_PopTermFromDB(EX); EX = NULL; if (tnum <= 8) targs = NULL; if (IsAtomTerm(tail)) { fstr = NULL; } format_clean_up(finfo.format_base, fstr, targs); Yap_JumpToEnv(ball); return FALSE; } break; case 'q': if (targ > tnum-1 || has_repeats) goto do_consistency_error; t = targs[targ++]; Yap_StartSlots(); Yap_plwrite (t, f_putc, Handle_vars_f|Quote_illegal_f|To_heap_f, 1200); Yap_CloseSlots(); FormatInfo = &finfo; break; case 'w': if (targ > tnum-1 || has_repeats) goto do_consistency_error; t = targs[targ++]; Yap_StartSlots(); Yap_plwrite (t, f_putc, Handle_vars_f|To_heap_f, 1200); Yap_CloseSlots(); FormatInfo = &finfo; break; case '~': if (has_repeats) goto do_consistency_error; f_putc(sno, (int) '~'); break; case 'n': if (!has_repeats) repeats = 1; while (repeats--) { f_putc(sno, (int) '\n'); } column_boundary = 0; finfo.pad_max = finfo.pad_entries; break; case 'N': if (!has_repeats) has_repeats = 1; if (Stream[sno].linepos != 0) { f_putc(sno, (int) '\n'); column_boundary = 0; finfo.pad_max = finfo.pad_entries; } if (repeats > 1) { Int i; for (i = 1; i < repeats; i++) f_putc(sno, (int) '\n'); column_boundary = 0; finfo.pad_max = finfo.pad_entries; } break; /* padding */ case '|': if (has_repeats) { fill_pads(repeats-(finfo.format_ptr-finfo.format_base)); } finfo.pad_max = finfo.pad_entries; if (repeats) column_boundary = repeats; else column_boundary = finfo.format_ptr-finfo.format_base; break; case '+': if (has_repeats) { fill_pads((repeats+column_boundary)-(finfo.format_ptr-finfo.format_base)); } else { repeats = 8; fill_pads(8); } finfo.pad_max = finfo.pad_entries; column_boundary = repeats+column_boundary; break; case 't': if (!has_repeats) finfo.pad_max->pad = ' '; else finfo.pad_max->pad = fptr[-2]; finfo.pad_max->pos = finfo.format_ptr-finfo.format_base; finfo.pad_max++; f_putc = format_putc; break; do_instantiation_error: Yap_Error_TYPE = INSTANTIATION_ERROR; goto do_default_error; do_type_int_error: Yap_Error_TYPE = TYPE_ERROR_INTEGER; goto do_default_error; do_type_number_error: Yap_Error_TYPE = TYPE_ERROR_NUMBER; goto do_default_error; do_type_atom_error: Yap_Error_TYPE = TYPE_ERROR_ATOM; goto do_default_error; do_domain_not_less_zero_error: Yap_Error_TYPE = DOMAIN_ERROR_NOT_LESS_THAN_ZERO; goto do_default_error; do_domain_error_radix: Yap_Error_TYPE = DOMAIN_ERROR_RADIX; goto do_default_error; do_consistency_error: default: Yap_Error_TYPE = CONSISTENCY_ERROR; do_default_error: if (tnum <= 8) targs = NULL; if (IsAtomTerm(tail)) { fstr = NULL; } { Term ta[2]; ta[0] = otail; ta[1] = oargs; Yap_Error(Yap_Error_TYPE, Yap_MkApplTerm(Yap_MkFunctor(AtomFormat,2),2,ta), "format/2"); } format_clean_up(finfo.format_base, fstr, targs); Yap_Error_TYPE = YAP_NO_ERROR; return FALSE; } } /* ok, now we should have a command */ } } else { f_putc(sno, ch); } } if (has_tabs) { for (fptr = finfo.format_base; fptr < finfo.format_ptr; fptr++) { Stream[sno].stream_putc(sno, *fptr); } } if (IsAtomTerm(tail)) { fstr = NULL; } if (tnum <= 8) targs = NULL; format_clean_up(finfo.format_base, fstr, targs); return (TRUE); } static Int p_format(void) { /* 'format'(Control,Args) */ Int res; res = format(Deref(ARG1),Deref(ARG2), Yap_c_output_stream); return res; } static Int format2(UInt stream_flag) { int old_c_stream = Yap_c_output_stream; Int out; Term tin = Deref(ARG1); if (IsVarTerm(tin)) { Yap_Error(INSTANTIATION_ERROR,tin,"format/3"); return FALSE; } /* needs to change Yap_c_output_stream for write */ Yap_c_output_stream = CheckStream (ARG1, Output_Stream_f|stream_flag, "format/3"); UNLOCK(Stream[Yap_c_output_stream].streamlock); if (Yap_c_output_stream == -1) { Yap_c_output_stream = old_c_stream; return FALSE; } out = format(Deref(ARG2),Deref(ARG3),Yap_c_output_stream); { Yap_c_output_stream = old_c_stream; } return out; } static Int p_format2(void) { /* 'format'(Stream,Control,Args) */ return format2(0); } static Int p_swi_format(void) { /* 'format'(Stream,Control,Args) */ return format2(SWI_Stream_f); } static Int p_skip (void) { /* '$skip'(Stream,N) */ int sno = CheckStream (ARG1, Input_Stream_f, "skip/2"); Int n = IntOfTerm (Deref (ARG2)); int ch; if (sno < 0) return (FALSE); if (n < 0 || n > 127) { UNLOCK(Stream[sno].streamlock); return (FALSE); } UNLOCK(Stream[sno].streamlock); while ((ch = Stream[sno].stream_wgetc(sno)) != n && ch != -1); return (TRUE); } void Yap_FlushStreams(void) { } #if HAVE_SELECT /* stream_select(+Streams,+TimeOut,-Result) */ static Int p_stream_select(void) { Term t1 = Deref(ARG1), t2; fd_set readfds, writefds, exceptfds; struct timeval timeout, *ptime; #if _MSC_VER u_int fdmax=0; #else int fdmax=0; #endif Term tout = TermNil, ti, Head; if (IsVarTerm(t1)) { Yap_Error(INSTANTIATION_ERROR,t1,"stream_select/3"); return FALSE; } if (!IsPairTerm(t1)) { Yap_Error(TYPE_ERROR_LIST,t1,"stream_select/3"); return(FALSE); } FD_ZERO(&readfds); FD_ZERO(&writefds); FD_ZERO(&exceptfds); ti = t1; while (ti != TermNil) { #if _MSC_VER u_int fd; #else int fd; #endif int sno; Head = HeadOfTerm(ti); sno = CheckStream(Head, Input_Stream_f, "stream_select/3"); if (sno < 0) return(FALSE); fd = GetStreamFd(sno); FD_SET(fd, &readfds); UNLOCK(Stream[sno].streamlock); if (fd > fdmax) fdmax = fd; ti = TailOfTerm(ti); } t2 = Deref(ARG2); if (IsVarTerm(t2)) { Yap_Error(INSTANTIATION_ERROR,t2,"stream_select/3"); return(FALSE); } if (IsAtomTerm(t2)) { if (t2 == MkAtomTerm(AtomOff)) { /* wait indefinitely */ ptime = NULL; } else { Yap_Error(DOMAIN_ERROR_TIMEOUT_SPEC,t1,"stream_select/3"); return(FALSE); } } else { Term t21, t22; if (!IsApplTerm(t2) || FunctorOfTerm(t2) != FunctorModule) { Yap_Error(DOMAIN_ERROR_TIMEOUT_SPEC,t2,"stream_select/3"); return(FALSE); } t21 = ArgOfTerm(1, t2); if (IsVarTerm(t21)) { Yap_Error(INSTANTIATION_ERROR,t2,"stream_select/3"); return(FALSE); } if (!IsIntegerTerm(t21)) { Yap_Error(DOMAIN_ERROR_TIMEOUT_SPEC,t2,"stream_select/3"); return(FALSE); } timeout.tv_sec = IntegerOfTerm(t21); if (timeout.tv_sec < 0) { Yap_Error(DOMAIN_ERROR_TIMEOUT_SPEC,t2,"stream_select/3"); return(FALSE); } t22 = ArgOfTerm(2, t2); if (IsVarTerm(t22)) { Yap_Error(INSTANTIATION_ERROR,t2,"stream_select/3"); return(FALSE); } if (!IsIntegerTerm(t22)) { Yap_Error(DOMAIN_ERROR_TIMEOUT_SPEC,t2,"stream_select/3"); return(FALSE); } timeout.tv_usec = IntegerOfTerm(t22); if (timeout.tv_usec < 0) { Yap_Error(DOMAIN_ERROR_TIMEOUT_SPEC,t2,"stream_select/3"); return(FALSE); } ptime = &timeout; } /* do the real work */ if (select(fdmax+1, &readfds, &writefds, &exceptfds, ptime) < 0) { #if HAVE_STRERROR Yap_Error(SYSTEM_ERROR, TermNil, "stream_select/3 (select: %s)", strerror(errno)); #else Yap_Error(SYSTEM_ERROR, TermNil, "stream_select/3 (select)"); #endif } while (t1 != TermNil) { int fd; int sno; Head = HeadOfTerm(t1); sno = CheckStream(Head, Input_Stream_f, "stream_select/3"); fd = GetStreamFd(sno); if (FD_ISSET(fd, &readfds)) tout = MkPairTerm(Head,tout); else tout = MkPairTerm(TermNil,tout); UNLOCK(Stream[sno].streamlock); t1 = TailOfTerm(t1); } /* we're done, just pass the info back */ return(Yap_unify(ARG3,tout)); } #endif static Int p_write_depth (void) { /* write_depth(Old,New) */ Term t1 = Deref (ARG1); Term t2 = Deref (ARG2); Term t3 = Deref (ARG3); if (!IsVarTerm (t1) && !IsIntegerTerm (t1)) { Yap_Error(TYPE_ERROR_INTEGER,t1,"write_depth/3"); return FALSE; } if (!IsVarTerm (t2) && !IsIntegerTerm (t2)) { Yap_Error(TYPE_ERROR_INTEGER,t2,"write_depth/3"); return FALSE; } if (!IsVarTerm (t3) && !IsIntegerTerm (t3)) { Yap_Error(TYPE_ERROR_INTEGER,t3,"write_depth/3"); return FALSE; } if (IsVarTerm (t1)) { Term t = MkIntegerTerm (max_depth); if (!Yap_unify_constant(t1, t)) return FALSE; } else max_depth = IntegerOfTerm (t1); if (IsVarTerm (t2)) { Term t = MkIntegerTerm (max_list); if (!Yap_unify_constant (t2, t)) return FALSE; } else max_list = IntegerOfTerm (t2); if (IsVarTerm (t3)) { Term t = MkIntegerTerm (max_write_args); if (!Yap_unify_constant (t3, t)) return FALSE; } else max_write_args = IntegerOfTerm (t3); return TRUE; } static Int p_change_type_of_char (void) { /* change_type_of_char(+char,+type) */ Term t1 = Deref (ARG1); Term t2 = Deref (ARG2); if (!IsVarTerm (t1) && !IsIntegerTerm (t1)) return FALSE; if (!IsVarTerm(t2) && !IsIntegerTerm(t2)) return FALSE; Yap_chtype[IntegerOfTerm(t1)] = IntegerOfTerm(t2); return TRUE; } static Int p_type_of_char (void) { /* type_of_char(+char,-type) */ Term t; Term t1 = Deref (ARG1); if (!IsVarTerm (t1) && !IsIntegerTerm (t1)) return FALSE; t = MkIntTerm(Yap_chtype[IntegerOfTerm (t1)]); return Yap_unify(t,ARG2); } static Int p_force_char_conversion(void) { int i; /* don't actually enable it until someone tries to add a conversion */ if (CharConversionTable2 == NULL) return(TRUE); for (i = 0; i < MaxStreams; i++) { if (!(Stream[i].status & Free_Stream_f)) Stream[i].stream_wgetc_for_read = ISOWGetc; } CharConversionTable = CharConversionTable2; return(TRUE); } static Int p_disable_char_conversion(void) { int i; for (i = 0; i < MaxStreams; i++) { if (!(Stream[i].status & Free_Stream_f)) Stream[i].stream_wgetc_for_read = Stream[i].stream_wgetc; } CharConversionTable = NULL; return(TRUE); } static Int p_char_conversion(void) { Term t0 = Deref(ARG1), t1 = Deref(ARG2); char *s0, *s1; if (IsVarTerm(t0)) { Yap_Error(INSTANTIATION_ERROR, t0, "char_conversion/2"); return (FALSE); } if (!IsAtomTerm(t0)) { Yap_Error(REPRESENTATION_ERROR_CHARACTER, t0, "char_conversion/2"); return (FALSE); } s0 = RepAtom(AtomOfTerm(t0))->StrOfAE; if (s0[1] != '\0') { Yap_Error(REPRESENTATION_ERROR_CHARACTER, t0, "char_conversion/2"); return (FALSE); } if (IsVarTerm(t1)) { Yap_Error(INSTANTIATION_ERROR, t1, "char_conversion/2"); return (FALSE); } if (!IsAtomTerm(t1)) { Yap_Error(REPRESENTATION_ERROR_CHARACTER, t1, "char_conversion/2"); return (FALSE); } s1 = RepAtom(AtomOfTerm(t1))->StrOfAE; if (s1[1] != '\0') { Yap_Error(REPRESENTATION_ERROR_CHARACTER, t1, "char_conversion/2"); return (FALSE); } /* check if we do have a table for converting characters */ if (CharConversionTable2 == NULL) { int i; /* don't create a table if we don't need to */ if (s0[0] == s1[0]) return(TRUE); CharConversionTable2 = Yap_AllocCodeSpace(NUMBER_OF_CHARS*sizeof(char)); while (CharConversionTable2 == NULL) { if (!Yap_growheap(FALSE, NUMBER_OF_CHARS*sizeof(char), NULL)) { Yap_Error(OUT_OF_HEAP_ERROR, TermNil, Yap_ErrorMessage); return(FALSE); } } if (yap_flags[CHAR_CONVERSION_FLAG] != 0) { if (p_force_char_conversion() == FALSE) return(FALSE); } for (i = 0; i < NUMBER_OF_CHARS; i++) CharConversionTable2[i] = i; } /* just add the new entry */ CharConversionTable2[(int)s0[0]] = s1[0]; /* done */ return(TRUE); } static Int p_current_char_conversion(void) { Term t0, t1; char *s0, *s1; if (CharConversionTable == NULL) { return(FALSE); } t0 = Deref(ARG1); if (IsVarTerm(t0)) { Yap_Error(INSTANTIATION_ERROR, t0, "current_char_conversion/2"); return (FALSE); } if (!IsAtomTerm(t0)) { Yap_Error(REPRESENTATION_ERROR_CHARACTER, t0, "current_char_conversion/2"); return (FALSE); } s0 = RepAtom(AtomOfTerm(t0))->StrOfAE; if (s0[1] != '\0') { Yap_Error(REPRESENTATION_ERROR_CHARACTER, t0, "current_char_conversion/2"); return (FALSE); } t1 = Deref(ARG2); if (IsVarTerm(t1)) { char out[2]; if (CharConversionTable[(int)s0[0]] == '\0') return(FALSE); out[0] = CharConversionTable[(int)s0[0]]; out[1] = '\0'; return(Yap_unify(ARG2,MkAtomTerm(Yap_LookupAtom(out)))); } if (!IsAtomTerm(t1)) { Yap_Error(REPRESENTATION_ERROR_CHARACTER, t1, "current_char_conversion/2"); return (FALSE); } s1 = RepAtom(AtomOfTerm(t1))->StrOfAE; if (s1[1] != '\0') { Yap_Error(REPRESENTATION_ERROR_CHARACTER, t1, "current_char_conversion/2"); return (FALSE); } else { return (CharConversionTable[(int)s0[0]] == '\0' && CharConversionTable[(int)s0[0]] == s1[0] ); } } static Int p_all_char_conversions(void) { Term out = TermNil; int i; if (CharConversionTable == NULL) { return(FALSE); } for (i = NUMBER_OF_CHARS; i > 0; ) { i--; if (CharConversionTable[i] != '\0') { Term t1, t2; char s[2]; s[1] = '\0'; s[0] = CharConversionTable[i]; t1 = MkAtomTerm(Yap_LookupAtom(s)); out = MkPairTerm(t1,out); s[0] = i; t2 = MkAtomTerm(Yap_LookupAtom(s)); out = MkPairTerm(t2,out); } } return(Yap_unify(ARG1,out)); } Int Yap_StreamToFileNo(Term t) { int sno = CheckStream(t, (Input_Stream_f|Output_Stream_f), "StreamToFileNo"); { UNLOCK(Stream[sno].streamlock); return(YP_fileno(Stream[sno].u.file.file)); } } static Int p_stream(void) { Term in = Deref(ARG1); if (IsVarTerm(in)) return(FALSE); if (IsApplTerm(in)) return(FunctorOfTerm(in) == FunctorStream); return(FALSE); } static Int p_same_file(void) { char *f1 = RepAtom(AtomOfTerm(Deref(ARG1)))->StrOfAE; char *f2 = RepAtom(AtomOfTerm(Deref(ARG2)))->StrOfAE; if (strcmp(f1,f2) == 0) return TRUE; #if HAVE_LSTAT { int out; struct stat *b1, *b2; while ((char *)H+sizeof(struct stat)*2 > (char *)(ASP-1024)) { if (!Yap_gcl(2*sizeof(struct stat), 2, ENV, gc_P(P,CP))) { Yap_Error(OUT_OF_STACK_ERROR, TermNil, Yap_ErrorMessage); return FALSE; } } b1 = (struct stat *)H; b2 = b1+1; if (strcmp(f1,"user_input") == 0) { if (fstat(fileno(Stream[0].u.file.file), b1) == -1) { /* file does not exist, but was opened? Return -1 */ return FALSE; } } else if (strcmp(f1,"user_output") == 0) { if (fstat(fileno(Stream[1].u.file.file), b1) == -1) { /* file does not exist, but was opened? Return -1 */ return FALSE; } } else if (strcmp(f1,"user_error") == 0) { if (fstat(fileno(Stream[2].u.file.file), b1) == -1) { /* file does not exist, but was opened? Return -1 */ return FALSE; } } else if (stat(f1, b1) == -1) { /* file does not exist, but was opened? Return -1 */ return FALSE; } if (strcmp(f2,"user_input") == 0) { if (fstat(fileno(Stream[0].u.file.file), b2) == -1) { /* file does not exist, but was opened? Return -1 */ return FALSE; } } else if (strcmp(f2,"user_output") == 0) { if (fstat(fileno(Stream[1].u.file.file), b2) == -1) { /* file does not exist, but was opened? Return -1 */ return FALSE; } } else if (strcmp(f2,"user_error") == 0) { if (fstat(fileno(Stream[2].u.file.file), b2) == -1) { /* file does not exist, but was opened? Return -1 */ return FALSE; } } else if (stat(f2, b2) == -1) { /* file does not exist, but was opened? Return -1 */ return FALSE; } out = (b1->st_ino == b2->st_ino #ifdef __LCC__ && memcmp((const void *)&(b1->st_dev),(const void *)&(b2->st_dev),sizeof(buf1.st_dev)) == 0 #else && b1->st_dev == b2->st_dev #endif ); return out; } #else return(FALSE); #endif } static Int p_float_format(void) { Term in = Deref(ARG1); if (IsVarTerm(in)) return Yap_unify(ARG1, MkAtomTerm(AtomFloatFormat)); AtomFloatFormat = AtomOfTerm(in); return TRUE; } static Int p_get_default_encoding(void) { Term out = MkIntegerTerm(DefaultEncoding()); return Yap_unify(ARG1, out); } static Int p_toupper(void) { Int out = IntegerOfTerm(Deref(ARG1)), uout; if (out < 0) { Yap_Error(REPRESENTATION_ERROR_CHARACTER_CODE, ARG1, "toupper"); return FALSE; } if (out < 128) uout = toupper(out); else uout = towupper(out); return Yap_unify(ARG2, MkIntegerTerm(uout)); } static Int p_tolower(void) { Int out = IntegerOfTerm(Deref(ARG1)), uout; if (out < 0) { Yap_Error(REPRESENTATION_ERROR_CHARACTER_CODE, ARG1, "tolower"); return FALSE; } if (out < 128) uout = tolower(out); else uout = towlower(out); return Yap_unify(ARG2, MkIntegerTerm(uout)); } static Int p_encoding (void) { /* '$encoding'(Stream,N) */ int sno = CheckStream (ARG1, Input_Stream_f|Output_Stream_f, "encoding/2"); Term t = Deref(ARG2); if (sno < 0) return FALSE; if (IsVarTerm(t)) { UNLOCK(Stream[sno].streamlock); return Yap_unify(ARG2, MkIntegerTerm(Stream[sno].encoding)); } Stream[sno].encoding = IntegerOfTerm(Deref(ARG2)); UNLOCK(Stream[sno].streamlock); return TRUE; } FILE * Yap_FileDescriptorFromStream(Term t) { int sno = CheckStream (t, Input_Stream_f|Output_Stream_f, "FileDescriptorFromStream"); if (sno < 0) return NULL; if (Stream[sno].status & (Free_Stream_f)) return NULL; return Stream[sno].u.file.file; } void Yap_InitBackIO (void) { } void Yap_InitIOPreds(void) { Term cm = CurrentModule; Yap_stdin = stdin; Yap_stdout = stdout; Yap_stderr = stderr; if (!Stream) Stream = (StreamDesc *)Yap_AllocCodeSpace(sizeof(StreamDesc)*MaxStreams); /* here the Input/Output predicates */ Yap_InitCPred ("$close", 1, p_close, SafePredFlag|SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$get0_line_codes", 2, p_get0_line_codes, SafePredFlag|SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$access", 1, p_access, SafePredFlag|SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("exists_directory", 1, p_exists_directory, SafePredFlag|SyncPredFlag); Yap_InitCPred ("$file_expansion", 2, p_file_expansion, SafePredFlag|SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$set_read_error_handler", 1, p_set_read_error_handler, SafePredFlag|SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$get_read_error_handler", 1, p_get_read_error_handler, SafePredFlag|SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$read", 6, p_read, SyncPredFlag|HiddenPredFlag|UserCPredFlag); Yap_InitCPred ("$read", 7, p_read2, SyncPredFlag|HiddenPredFlag|UserCPredFlag); Yap_InitCPred ("$skip", 2, p_skip, SafePredFlag|SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$write", 2, p_write, SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$write", 3, p_write2, SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$write_with_prio", 3, p_write_prio, SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$write_with_prio", 4, p_write2_prio, SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("format", 2, p_format, SyncPredFlag); Yap_InitCPred ("format", 3, p_format2, SyncPredFlag); Yap_InitCPred ("$start_line", 1, p_startline, SafePredFlag|SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$user_file_name", 2, p_user_file_name, SafePredFlag|SyncPredFlag), Yap_InitCPred ("$past_eof", 1, p_past_eof, SafePredFlag|SyncPredFlag), Yap_InitCPred ("$has_bom", 1, p_has_bom, SafePredFlag); Yap_InitCPred ("$stream_representation_error", 2, p_representation_error, SafePredFlag|SyncPredFlag); Yap_InitCPred ("$is_same_tty", 2, p_is_same_tty, SafePredFlag|SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("always_prompt_user", 0, p_always_prompt_user, SafePredFlag|SyncPredFlag); Yap_InitCPred ("write_depth", 3, p_write_depth, SafePredFlag|SyncPredFlag); Yap_InitCPred ("$change_type_of_char", 2, p_change_type_of_char, SafePredFlag|SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$type_of_char", 2, p_type_of_char, SafePredFlag|SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("char_conversion", 2, p_char_conversion, SyncPredFlag); Yap_InitCPred ("$current_char_conversion", 2, p_current_char_conversion, SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$all_char_conversions", 1, p_all_char_conversions, SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$force_char_conversion", 0, p_force_char_conversion, SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$disable_char_conversion", 0, p_disable_char_conversion, SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$stream", 1, p_stream, SafePredFlag|TestPredFlag); Yap_InitCPred ("$get_default_encoding", 1, p_get_default_encoding, SafePredFlag|TestPredFlag); Yap_InitCPred ("$encoding", 2, p_encoding, SafePredFlag|SyncPredFlag), #if HAVE_SELECT Yap_InitCPred ("stream_select", 3, p_stream_select, SafePredFlag|SyncPredFlag); #endif Yap_InitCPred ("$same_file", 2, p_same_file, SafePredFlag|SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$float_format", 1, p_float_format, SafePredFlag|SyncPredFlag|HiddenPredFlag); Yap_InitCPred ("$has_readline", 0, p_has_readline, SafePredFlag|HiddenPredFlag); Yap_InitCPred ("$toupper", 2, p_toupper, SafePredFlag|HiddenPredFlag); Yap_InitCPred ("$tolower", 2, p_tolower, SafePredFlag|HiddenPredFlag); CurrentModule = SYSTEM_MODULE; Yap_InitCPred ("swi_format", 3, p_swi_format, SyncPredFlag); CurrentModule = cm; Yap_InitReadUtil (); InitPlIO (); #if HAVE_LIBREADLINE && HAVE_READLINE_READLINE_H InitReadline(); #endif }