f1951777b7
them.
986 lines
24 KiB
C
Executable File
986 lines
24 KiB
C
Executable File
/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: iopreds.c *
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* Last rev: 5/2/88 *
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* mods: *
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* comments: Input/Output C implemented predicates *
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* *
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*************************************************************************/
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#ifdef SCCS
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static char SccsId[] = "%W% %G%";
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#endif
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/*
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* This file includes the definition of a miscellania of standard predicates
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* for yap refering to: Files and Streams, Simple Input/Output,
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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 "eval.h"
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/* stuff we want to use in standard YAP code */
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#include "pl-shared.h"
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#include "YapText.h"
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#include <stdlib.h>
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#if HAVE_STDARG_H
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#include <stdarg.h>
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#endif
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#if HAVE_CTYPE_H
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#include <ctype.h>
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#endif
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#if HAVE_WCTYPE_H
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#include <wctype.h>
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#endif
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#if HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#if HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#if HAVE_SYS_SELECT_H && !_MSC_VER && !defined(__MINGW32__)
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#include <sys/select.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if HAVE_STRING_H
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#include <string.h>
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#endif
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#if HAVE_SIGNAL_H
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#include <signal.h>
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#endif
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#if HAVE_FCNTL_H
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/* for O_BINARY and O_TEXT in WIN32 */
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#include <fcntl.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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#endif
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#if !HAVE_STRNCAT
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#define strncat(X,Y,Z) strcat(X,Y)
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#endif
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#if !HAVE_STRNCPY
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#define strncpy(X,Y,Z) strcpy(X,Y)
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#endif
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#if _MSC_VER || defined(__MINGW32__)
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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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#include "pl-read.h"
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static Int p_set_read_error_handler( USES_REGS1 );
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static Int p_get_read_error_handler( USES_REGS1 );
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static Int p_startline( USES_REGS1 );
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static Int p_change_type_of_char( USES_REGS1 );
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static Int p_type_of_char( USES_REGS1 );
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extern Atom Yap_FileName(IOSTREAM *s);
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static Term
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StreamName(IOSTREAM *s)
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{
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return MkAtomTerm(Yap_FileName(s));
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}
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void
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Yap_InitStdStreams (void)
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{
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}
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void
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Yap_InitPlIO (void)
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{
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}
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/*
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* Used by the prompts to check if they are after a newline, and then a
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* prompt should be output, or if we are in the middle of a line.
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*/
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static int newline = TRUE;
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#ifdef DEBUG
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static int eolflg = 1;
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static char my_line[200] = {0};
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static char *lp = my_line;
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static YP_File curfile;
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#ifdef MACC
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static void
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InTTYLine(char *line)
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{
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char *p = line;
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char ch;
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while ((ch = InKey()) != '\n' && ch != '\r')
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if (ch == 8) {
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if (line < p)
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BackupTTY(*--p);
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} else
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TTYChar(*p++ = ch);
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TTYChar('\n');
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*p = 0;
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}
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#endif
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void
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Yap_DebugSetIFile(char *fname)
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{
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if (curfile)
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YP_fclose(curfile);
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curfile = YP_fopen(fname, "r");
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if (curfile == NULL) {
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curfile = stdin;
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fprintf(stderr,"%% YAP Warning: can not open %s for input\n", fname);
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}
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}
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void
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Yap_DebugEndline()
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{
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*lp = 0;
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}
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int
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Yap_DebugGetc()
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{
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int ch;
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if (eolflg) {
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if (curfile != NULL) {
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if (YP_fgets(my_line, 200, curfile) == 0)
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curfile = NULL;
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}
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if (curfile == NULL)
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if (YP_fgets(my_line, 200, stdin) == NULL) {
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return EOF;
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}
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eolflg = 0;
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lp = my_line;
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}
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if ((ch = *lp++) == 0)
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ch = '\n', eolflg = 1;
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if (GLOBAL_Option['l' - 96])
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putc(ch, GLOBAL_logfile);
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return (ch);
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}
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int
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Yap_DebugPutc(int sno, wchar_t ch)
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{
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if (GLOBAL_Option['l' - 96])
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(void) putc(ch, GLOBAL_logfile);
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return (Sputc(ch, GLOBAL_stderr));
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}
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void
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Yap_DebugPlWrite(Term t)
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{
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Yap_plwrite(t, NULL, 15, 0, 1200);
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}
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void
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Yap_DebugErrorPutc(int c)
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{
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CACHE_REGS
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Yap_DebugPutc (LOCAL_c_error_stream, c);
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}
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#endif
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int
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Yap_GetCharForSIGINT(void)
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{
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int ch;
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/* ask for a new line */
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Sfprintf(Serror, "\nAction (h for help): ");
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ch = Sgetchar();
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/* first process up to end of line */
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while ((Sfgetc(Sinput)) != '\n');
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newline = TRUE;
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return ch;
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}
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typedef struct stream_ref
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{ struct io_stream *read;
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struct io_stream *write;
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} stream_ref;
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#ifdef BEAM
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int beam_write (void)
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{
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Yap_StartSlots();
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Yap_plwrite (ARG1, NULL, 0, 0, 1200);
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LOCAL_CurSlot = CurSlot;
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if (EX != 0L) {
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Term ball = Yap_PopTermFromDB(EX);
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EX = 0L;
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Yap_JumpToEnv(ball);
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return(FALSE);
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}
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return (TRUE);
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}
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#endif
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static void
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clean_vars(VarEntry *p)
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{
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if (p == NULL) return;
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p->VarAdr = TermNil;
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clean_vars(p->VarLeft);
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clean_vars(p->VarRight);
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}
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static Term
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syntax_error (TokEntry * tokptr, IOSTREAM *st, Term *outp)
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{
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CACHE_REGS
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Term info;
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int count = 0, out = 0;
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Int start, err = 0, end;
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Term tf[7];
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Term *error = tf+3;
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CELL *Hi = HR;
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int has_qq = FALSE;
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/* make sure to globalise variable */
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start = tokptr->TokPos;
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clean_vars(LOCAL_VarTable);
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clean_vars(LOCAL_AnonVarTable);
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while (1) {
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Term ts[2];
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if (HR > ASP-1024) {
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tf[3] = TermNil;
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err = 0;
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end = 0;
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/* for some reason moving this earlier confuses gcc on solaris */
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HR = Hi;
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break;
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}
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if (tokptr == LOCAL_toktide) {
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err = tokptr->TokPos;
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out = count;
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}
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info = tokptr->TokInfo;
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switch (tokptr->Tok) {
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case Name_tok:
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{
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Term t0[1];
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t0[0] = MkAtomTerm((Atom)info);
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ts[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomAtom,1),1,t0);
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}
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break;
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case QuasiQuotes_tok:
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case WQuasiQuotes_tok:
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{
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if (has_qq) {
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Term t0[1];
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t0[0] = MkAtomTerm(Yap_LookupAtom("{|"));
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ts[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomAtom,1),1,t0);
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has_qq = FALSE;
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} else {
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Term t0[1];
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t0[0] = MkAtomTerm(Yap_LookupAtom("|| ... |}"));
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ts[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomAtom,1),1,t0);
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has_qq = TRUE;
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}
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}
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break;
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case Number_tok:
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ts[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomNumber,1),1,&(tokptr->TokInfo));
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break;
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case Var_tok:
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{
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Term t[3];
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VarEntry *varinfo = (VarEntry *)info;
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t[0] = MkIntTerm(0);
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t[1] = Yap_CharsToListOfCodes((const char *)varinfo->VarRep PASS_REGS);
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if (varinfo->VarAdr == TermNil) {
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t[2] = varinfo->VarAdr = MkVarTerm();
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} else {
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t[2] = varinfo->VarAdr;
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}
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ts[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomGVar,3),3,t);
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}
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break;
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case String_tok:
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{
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Term t0 = Yap_CharsToListOfCodes((const char *)info PASS_REGS);
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ts[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomString,1),1,&t0);
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}
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break;
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case WString_tok:
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{
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Term t0 = Yap_WCharsToListOfCodes((const wchar_t *)info PASS_REGS);
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ts[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomString,1),1,&t0);
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}
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break;
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case Error_tok:
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case eot_tok:
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break;
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case Ponctuation_tok:
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{
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char s[2];
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s[1] = '\0';
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s[0] = (char)info;
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if (s[0] == 'l')
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s[0] = '(';
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ts[0] = MkAtomTerm(Yap_LookupAtom(s));
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}
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}
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if (tokptr->Tok == Ord (eot_tok)) {
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*error = TermNil;
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end = tokptr->TokPos;
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break;
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} else if (tokptr->Tok != Ord (Error_tok)) {
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ts[1] = MkIntegerTerm(tokptr->TokPos);
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*error =
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MkPairTerm(Yap_MkApplTerm(FunctorMinus,2,ts),TermNil);
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error = RepPair(*error)+1;
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count++;
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}
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tokptr = tokptr->TokNext;
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}
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/* now we can throw away tokens, so we can unify and possibly overwrite TR */
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Yap_unify(*outp, MkVarTerm());
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if (IsVarTerm(*outp) && (VarOfTerm(*outp) > HR || VarOfTerm(*outp) < H0)) {
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tf[0] = Yap_MkNewApplTerm(Yap_MkFunctor(AtomRead,1),1);
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} else {
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tf[0] = Yap_MkApplTerm(Yap_MkFunctor(AtomRead,1),1,outp);
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}
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{
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Term t[3];
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t[0] = MkIntegerTerm(start);
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t[1] = MkIntegerTerm(err);
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t[2] = MkIntegerTerm(end);
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tf[1] = Yap_MkApplTerm(Yap_MkFunctor(AtomBetween,3),3,t);
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}
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tf[2] = MkAtomTerm(AtomHERE);
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tf[4] = MkIntegerTerm(out);
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tf[5] = MkIntegerTerm(err);
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tf[6] = StreamName(st);
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return(Yap_MkApplTerm(FunctorSyntaxError,7,tf));
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}
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static void
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GenerateSyntaxError(Term *tp, TokEntry *tokstart, IOSTREAM *sno, Term msg USES_REGS)
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{
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if (tp) {
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Term et[2];
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Term t = MkVarTerm();
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et[1] = MkPairTerm(syntax_error(tokstart, sno, &t), msg);
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t = MkAtomTerm(AtomSyntaxError);
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et[0] = Yap_MkApplTerm(FunctorShortSyntaxError,1,&t);
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*tp = Yap_MkApplTerm(FunctorError, 2, et);
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}
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}
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Int
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Yap_FirstLineInParse (void)
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{
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CACHE_REGS
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return LOCAL_StartLine;
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}
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static Int
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p_startline ( USES_REGS1 )
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{
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return (Yap_unify_constant (ARG1, MkIntegerTerm (LOCAL_StartLine)));
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}
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/* control the parser error handler */
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static Int
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p_set_read_error_handler( USES_REGS1 )
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{
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Term t = Deref(ARG1);
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char *s;
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if (IsVarTerm(t)) {
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Yap_Error(INSTANTIATION_ERROR,t,"set_read_error_handler");
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return(FALSE);
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}
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if (!IsAtomTerm(t)) {
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Yap_Error(TYPE_ERROR_ATOM,t,"bad syntax_error handler");
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return(FALSE);
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}
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s = RepAtom(AtomOfTerm(t))->StrOfAE;
|
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if (!strcmp(s, "fail")) {
|
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ParserErrorStyle = FAIL_ON_PARSER_ERROR;
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} else if (!strcmp(s, "error")) {
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ParserErrorStyle = EXCEPTION_ON_PARSER_ERROR;
|
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} else if (!strcmp(s, "quiet")) {
|
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ParserErrorStyle = QUIET_ON_PARSER_ERROR;
|
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} else if (!strcmp(s, "dec10")) {
|
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ParserErrorStyle = CONTINUE_ON_PARSER_ERROR;
|
|
} else {
|
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Yap_Error(DOMAIN_ERROR_SYNTAX_ERROR_HANDLER,t,"bad syntax_error handler");
|
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return(FALSE);
|
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}
|
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return(TRUE);
|
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}
|
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|
|
/* return the status for the parser error handler */
|
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static Int
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p_get_read_error_handler( USES_REGS1 )
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{
|
|
Term t;
|
|
|
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switch (ParserErrorStyle) {
|
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case FAIL_ON_PARSER_ERROR:
|
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t = MkAtomTerm(AtomFail);
|
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break;
|
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case EXCEPTION_ON_PARSER_ERROR:
|
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t = MkAtomTerm(AtomError);
|
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break;
|
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case QUIET_ON_PARSER_ERROR:
|
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t = MkAtomTerm(AtomQuiet);
|
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break;
|
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case CONTINUE_ON_PARSER_ERROR:
|
|
t = MkAtomTerm(AtomDec10);
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break;
|
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default:
|
|
Yap_Error(SYSTEM_ERROR,TermNil,"corrupted syntax_error handler");
|
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return(FALSE);
|
|
}
|
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return (Yap_unify_constant (ARG1, t));
|
|
}
|
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|
|
|
|
|
|
int
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Yap_read_term(term_t t0, IOSTREAM *inp_stream, struct read_data_t *rd)
|
|
{
|
|
CACHE_REGS
|
|
TokEntry *tokstart;
|
|
Term t, v;
|
|
Term OCurrentModule = CurrentModule, tmod, tpos;
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|
int store_comments = rd->comments;
|
|
|
|
if (inp_stream == NULL) {
|
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return FALSE;
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}
|
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CurrentModule = tmod = MkAtomTerm(rd->module->AtomOfME);
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LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
while (TRUE) {
|
|
CELL *old_H;
|
|
int64_t cpos = 0;
|
|
int seekable = inp_stream->functions->seek != NULL;
|
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|
|
/* two cases where we can seek: memory and console */
|
|
if (seekable) {
|
|
cpos = inp_stream->posbuf.byteno;
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}
|
|
/* Scans the term using stack space */
|
|
while (TRUE) {
|
|
old_H = HR;
|
|
LOCAL_Comments = TermNil;
|
|
LOCAL_CommentsNextChar = LOCAL_CommentsTail = NULL;
|
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tokstart = LOCAL_tokptr = LOCAL_toktide = Yap_tokenizer(inp_stream, store_comments, &tpos, rd);
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if (LOCAL_Error_TYPE != YAP_NO_ERROR && seekable) {
|
|
HR = old_H;
|
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Yap_clean_tokenizer(tokstart, LOCAL_VarTable, LOCAL_AnonVarTable, LOCAL_Comments);
|
|
if (seekable) {
|
|
Sseek64(inp_stream, cpos, SIO_SEEK_SET);
|
|
}
|
|
if (LOCAL_Error_TYPE == OUT_OF_TRAIL_ERROR) {
|
|
LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
if (!Yap_growtrail (sizeof(CELL) * K16, FALSE)) {
|
|
return FALSE;
|
|
}
|
|
} else if (LOCAL_Error_TYPE == OUT_OF_AUXSPACE_ERROR) {
|
|
LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
if (!Yap_ExpandPreAllocCodeSpace(0, NULL, TRUE)) {
|
|
return FALSE;
|
|
}
|
|
} else if (LOCAL_Error_TYPE == OUT_OF_HEAP_ERROR) {
|
|
LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
if (!Yap_growheap(FALSE, 0, NULL)) {
|
|
return FALSE;
|
|
}
|
|
} else if (LOCAL_Error_TYPE == OUT_OF_STACK_ERROR) {
|
|
LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
if (!Yap_dogc( 0, NULL PASS_REGS )) {
|
|
return FALSE;
|
|
}
|
|
}
|
|
} else {
|
|
/* done with this */
|
|
break;
|
|
}
|
|
}
|
|
LOCAL_Error_TYPE = YAP_NO_ERROR;
|
|
/* preserve value of H after scanning: otherwise we may lose strings
|
|
and floats */
|
|
old_H = HR;
|
|
if (tokstart != NULL && tokstart->Tok == Ord (eot_tok)) {
|
|
/* did we get the end of file from an abort? */
|
|
if (LOCAL_ErrorMessage &&
|
|
!strcmp(LOCAL_ErrorMessage,"Abort")) {
|
|
Yap_clean_tokenizer(tokstart, LOCAL_VarTable, LOCAL_AnonVarTable, LOCAL_Comments);
|
|
return FALSE;
|
|
} else {
|
|
Yap_clean_tokenizer(tokstart, LOCAL_VarTable, LOCAL_AnonVarTable, LOCAL_Comments);
|
|
rd->varnames = 0;
|
|
rd->singles = 0;
|
|
return Yap_unify_constant( Yap_GetFromSlot( t0 PASS_REGS), MkAtomTerm (AtomEof));
|
|
}
|
|
}
|
|
repeat_cycle:
|
|
CurrentModule = tmod;
|
|
if (LOCAL_ErrorMessage || (t = Yap_Parse(rd)) == 0) {
|
|
CurrentModule = OCurrentModule;
|
|
if (LOCAL_ErrorMessage) {
|
|
int res;
|
|
|
|
if (!strcmp(LOCAL_ErrorMessage,"Stack Overflow") ||
|
|
!strcmp(LOCAL_ErrorMessage,"Trail Overflow") ||
|
|
!strcmp(LOCAL_ErrorMessage,"Heap Overflow")) {
|
|
/* ignore term we just built */
|
|
tr_fr_ptr old_TR = TR;
|
|
|
|
|
|
HR = old_H;
|
|
TR = (tr_fr_ptr)LOCAL_ScannerStack;
|
|
|
|
if (!strcmp(LOCAL_ErrorMessage,"Stack Overflow"))
|
|
res = Yap_growstack_in_parser(&old_TR, &tokstart, &LOCAL_VarTable);
|
|
else if (!strcmp(LOCAL_ErrorMessage,"Heap Overflow"))
|
|
res = Yap_growheap_in_parser(&old_TR, &tokstart, &LOCAL_VarTable);
|
|
else
|
|
res = Yap_growtrail_in_parser(&old_TR, &tokstart, &LOCAL_VarTable);
|
|
if (res) {
|
|
LOCAL_ScannerStack = (char *)TR;
|
|
TR = old_TR;
|
|
old_H = HR;
|
|
LOCAL_tokptr = LOCAL_toktide = tokstart;
|
|
LOCAL_ErrorMessage = NULL;
|
|
goto repeat_cycle;
|
|
}
|
|
LOCAL_ScannerStack = (char *)TR;
|
|
TR = old_TR;
|
|
}
|
|
}
|
|
{
|
|
Term terror;
|
|
if (LOCAL_ErrorMessage == NULL)
|
|
LOCAL_ErrorMessage = "SYNTAX ERROR";
|
|
GenerateSyntaxError(&terror, tokstart, inp_stream, MkAtomTerm(Yap_LookupAtom(LOCAL_ErrorMessage)) PASS_REGS);
|
|
|
|
Yap_clean_tokenizer(tokstart, LOCAL_VarTable, LOCAL_AnonVarTable, LOCAL_Comments);
|
|
rd->has_exception = TRUE;
|
|
rd->exception = Yap_InitSlot(terror PASS_REGS);
|
|
return FALSE;
|
|
}
|
|
} else {
|
|
CurrentModule = OCurrentModule;
|
|
/* parsing succeeded */
|
|
break;
|
|
}
|
|
}
|
|
if (!Yap_unify(t, Yap_GetFromSlot( t0 PASS_REGS)))
|
|
return FALSE;
|
|
if (store_comments && !Yap_unify(LOCAL_Comments, Yap_GetFromSlot( rd->comments PASS_REGS)))
|
|
return FALSE;
|
|
if (rd->varnames) {
|
|
while (TRUE) {
|
|
CELL *old_H = HR;
|
|
|
|
if (setjmp(LOCAL_IOBotch) == 0) {
|
|
v = Yap_VarNames(LOCAL_VarTable, TermNil);
|
|
break;
|
|
} else {
|
|
tr_fr_ptr old_TR;
|
|
restore_machine_regs();
|
|
|
|
old_TR = TR;
|
|
/* restart global */
|
|
HR = old_H;
|
|
TR = (tr_fr_ptr)LOCAL_ScannerStack;
|
|
Yap_growstack_in_parser(&old_TR, &tokstart, &LOCAL_VarTable);
|
|
LOCAL_ScannerStack = (char *)TR;
|
|
TR = old_TR;
|
|
}
|
|
}
|
|
if (!Yap_unify(v, Yap_GetFromSlot( rd->varnames PASS_REGS)))
|
|
return FALSE;
|
|
}
|
|
|
|
if (rd->variables) {
|
|
while (TRUE) {
|
|
CELL *old_H = HR;
|
|
|
|
if (setjmp(LOCAL_IOBotch) == 0) {
|
|
v = Yap_Variables(LOCAL_VarTable, TermNil);
|
|
break;
|
|
} else {
|
|
tr_fr_ptr old_TR;
|
|
restore_machine_regs();
|
|
|
|
old_TR = TR;
|
|
/* restart global */
|
|
HR = old_H;
|
|
TR = (tr_fr_ptr)LOCAL_ScannerStack;
|
|
Yap_growstack_in_parser(&old_TR, &tokstart, &LOCAL_VarTable);
|
|
LOCAL_ScannerStack = (char *)TR;
|
|
TR = old_TR;
|
|
}
|
|
}
|
|
if (!Yap_unify(v, Yap_GetFromSlot( rd->variables PASS_REGS)))
|
|
return FALSE;
|
|
}
|
|
if (rd->singles) {
|
|
while (TRUE) {
|
|
CELL *old_H = HR;
|
|
|
|
if (setjmp(LOCAL_IOBotch) == 0) {
|
|
v = Yap_Singletons(LOCAL_VarTable, TermNil);
|
|
break;
|
|
} else {
|
|
tr_fr_ptr old_TR;
|
|
restore_machine_regs();
|
|
|
|
old_TR = TR;
|
|
/* restart global */
|
|
HR = old_H;
|
|
TR = (tr_fr_ptr)LOCAL_ScannerStack;
|
|
Yap_growstack_in_parser(&old_TR, &tokstart, &LOCAL_VarTable);
|
|
LOCAL_ScannerStack = (char *)TR;
|
|
TR = old_TR;
|
|
}
|
|
}
|
|
if (rd->singles == 1) {
|
|
if (IsPairTerm(v))
|
|
rd->singles = Yap_InitSlot( v PASS_REGS);
|
|
else
|
|
rd->singles = FALSE;
|
|
} else if (rd->singles) {
|
|
if (!Yap_unify( rd->singles, Yap_GetFromSlot( v PASS_REGS )))
|
|
return FALSE;
|
|
}
|
|
}
|
|
Yap_clean_tokenizer(tokstart, LOCAL_VarTable, LOCAL_AnonVarTable, LOCAL_Comments);
|
|
return TRUE;
|
|
}
|
|
|
|
static Int
|
|
p_change_type_of_char ( USES_REGS1 )
|
|
{ /* 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 ( USES_REGS1 )
|
|
{ /* 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( USES_REGS1 )
|
|
{
|
|
/* don't actually enable it until someone tries to add a conversion */
|
|
if (CharConversionTable2 == NULL)
|
|
return(TRUE);
|
|
CharConversionTable = CharConversionTable2;
|
|
return(TRUE);
|
|
}
|
|
|
|
static Int
|
|
p_disable_char_conversion( USES_REGS1 )
|
|
{
|
|
CharConversionTable = NULL;
|
|
return(TRUE);
|
|
}
|
|
|
|
static Int
|
|
p_char_conversion( USES_REGS1 )
|
|
{
|
|
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) {
|
|
GET_LD
|
|
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, LOCAL_ErrorMessage);
|
|
return(FALSE);
|
|
}
|
|
}
|
|
if (truePrologFlag(PLFLAG_CHARCONVERSION)) {
|
|
if (p_force_char_conversion( PASS_REGS1 ) == 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( USES_REGS1 )
|
|
{
|
|
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( USES_REGS1 )
|
|
{
|
|
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));
|
|
}
|
|
|
|
static Int
|
|
p_float_format( USES_REGS1 )
|
|
{
|
|
Term in = Deref(ARG1);
|
|
if (IsVarTerm(in))
|
|
return Yap_unify(ARG1, MkAtomTerm(AtomFloatFormat));
|
|
AtomFloatFormat = AtomOfTerm(in);
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
static Int
|
|
p_style_checker( USES_REGS1 )
|
|
{
|
|
Term t = Deref( ARG1 );
|
|
LD_FROM_REGS
|
|
|
|
if (IsVarTerm(t)) {
|
|
Term t = TermNil;
|
|
if ( debugstatus.styleCheck & LONGATOM_CHECK) {
|
|
t = MkPairTerm( MkAtomTerm(AtomAtom), t );
|
|
}
|
|
if ( debugstatus.styleCheck & SINGLETON_CHECK) {
|
|
t = MkPairTerm( MkAtomTerm(AtomSingleton), t );
|
|
}
|
|
if ( debugstatus.styleCheck & MULTITON_CHECK) {
|
|
t = MkPairTerm( MkAtomTerm(AtomVarBranches), t );
|
|
}
|
|
if ( debugstatus.styleCheck & DISCONTIGUOUS_STYLE) {
|
|
t = MkPairTerm( MkAtomTerm(AtomDiscontiguous), t );
|
|
}
|
|
if ( debugstatus.styleCheck & NOEFFECT_CHECK) {
|
|
t = MkPairTerm( MkAtomTerm(AtomNoEffect), t );
|
|
}
|
|
if ( debugstatus.styleCheck & CHARSET_CHECK) {
|
|
t = MkPairTerm( MkAtomTerm(AtomCharset), t );
|
|
}
|
|
if ( debugstatus.styleCheck & MULTIPLE_CHECK) {
|
|
t = MkPairTerm( MkAtomTerm(AtomMultiple), t );
|
|
}
|
|
} else {
|
|
while (IsPairTerm(t)) {
|
|
Term h = HeadOfTerm( t );
|
|
t = TailOfTerm( t );
|
|
|
|
if (IsAtomTerm(h)) {
|
|
Atom at = AtomOfTerm( h );
|
|
if (at == AtomAtom) debugstatus.styleCheck |= LONGATOM_CHECK;
|
|
else if (at == AtomSingleton) debugstatus.styleCheck |= SINGLETON_CHECK;
|
|
else if (at == AtomVarBranches) debugstatus.styleCheck |= MULTITON_CHECK;
|
|
else if (at == AtomDiscontiguous) debugstatus.styleCheck |= DISCONTIGUOUS_STYLE;
|
|
else if (at == AtomNoEffect) debugstatus.styleCheck |= NOEFFECT_CHECK;
|
|
else if (at == AtomCharset) debugstatus.styleCheck |= CHARSET_CHECK;
|
|
else if (at == AtomMultiple) debugstatus.styleCheck |= MULTIPLE_CHECK;
|
|
} else {
|
|
Atom at = AtomOfTerm( ArgOfTerm( 1, h ) );
|
|
if (at == AtomAtom) debugstatus.styleCheck |= LONGATOM_CHECK;
|
|
else if (at == AtomSingleton) debugstatus.styleCheck &= ~SINGLETON_CHECK;
|
|
else if (at == AtomVarBranches) debugstatus.styleCheck &= ~MULTITON_CHECK;
|
|
else if (at == AtomDiscontiguous) debugstatus.styleCheck &= ~DISCONTIGUOUS_STYLE;
|
|
else if (at == AtomNoEffect) debugstatus.styleCheck &= ~NOEFFECT_CHECK;
|
|
else if (at == AtomMultiple) debugstatus.styleCheck &= ~MULTIPLE_CHECK;
|
|
}
|
|
}
|
|
}
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
void
|
|
Yap_InitBackIO (void)
|
|
{
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static Int
|
|
p_write_string( USES_REGS1 )
|
|
{
|
|
Term in = Deref(ARG1);
|
|
char *s;
|
|
size_t length;
|
|
int encoding;
|
|
char buf[256];
|
|
|
|
if ((s = Yap_TermToString( in, NULL, 0, &length, &encoding, 0)))
|
|
fprintf(stderr,"%ld %s\n",length, s);
|
|
if ((s = Yap_TermToString( in, buf, 256, &length, &encoding, 0)))
|
|
fprintf(stderr,"%ld %s\n",length, s);
|
|
return TRUE;
|
|
}
|
|
#endif
|
|
|
|
void
|
|
Yap_InitIOPreds(void)
|
|
{
|
|
/* here the Input/Output predicates */
|
|
Yap_InitCPred ("$set_read_error_handler", 1, p_set_read_error_handler, SafePredFlag|SyncPredFlag);
|
|
Yap_InitCPred ("$get_read_error_handler", 1, p_get_read_error_handler, SafePredFlag|SyncPredFlag);
|
|
#ifdef DEBUG
|
|
Yap_InitCPred ("write_string", 2, p_write_string, SyncPredFlag|UserCPredFlag);
|
|
#endif
|
|
Yap_InitCPred ("$start_line", 1, p_startline, SafePredFlag|SyncPredFlag);
|
|
Yap_InitCPred ("$change_type_of_char", 2, p_change_type_of_char, SafePredFlag|SyncPredFlag);
|
|
Yap_InitCPred ("$type_of_char", 2, p_type_of_char, SafePredFlag|SyncPredFlag);
|
|
Yap_InitCPred ("char_conversion", 2, p_char_conversion, SyncPredFlag);
|
|
Yap_InitCPred ("$current_char_conversion", 2, p_current_char_conversion, SyncPredFlag);
|
|
Yap_InitCPred ("$all_char_conversions", 1, p_all_char_conversions, SyncPredFlag);
|
|
Yap_InitCPred ("$force_char_conversion", 0, p_force_char_conversion, SyncPredFlag);
|
|
Yap_InitCPred ("$disable_char_conversion", 0, p_disable_char_conversion, SyncPredFlag);
|
|
#if HAVE_SELECT
|
|
// Yap_InitCPred ("stream_select", 3, p_stream_select, SafePredFlag|SyncPredFlag);
|
|
#endif
|
|
Yap_InitCPred ("$float_format", 1, p_float_format, SafePredFlag|SyncPredFlag);
|
|
Yap_InitCPred ("$style_checker", 1, p_style_checker, SyncPredFlag);
|
|
}
|