939 lines
25 KiB
C
939 lines
25 KiB
C
/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: charcodes.c *
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* Last rev: 5/2/88 *
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* mods: *
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* comments: Character codes and character conversion *
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* *
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*************************************************************************/
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#ifdef SCCS
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static char SccsId[] = "%W% %G%";
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#endif
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/**
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* @file chartypes.c
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* @author VITOR SANTOS COSTA <vsc@VITORs-MBP.lan>
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* @date Thu Nov 19 12:05:14 2015
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*
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* @brief Character Properties
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*
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*
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*/
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///{@
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/// @addtogroup CharProps
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/**
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* @defgroup CharIO Character-Based Input/Output
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* @ingroup InputOutput
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*/
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/*
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* This file includes the definition of a character properties.
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*
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*/
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#include "Yap.h"
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#include "YapHeap.h"
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#include "YapText.h"
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#include "Yatom.h"
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#include "yapio.h"
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#include <stdlib.h>
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#if HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if HAVE_STDARG_H
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#include <stdarg.h>
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#endif
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#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_LOCALE_H
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#include <locale.h>
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#endif
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#ifdef _WIN32
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#if HAVE_IO_H
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/* Windows */
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#include <io.h>
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#endif
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#if HAVE_SOCKET
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#include <winsock2.h>
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#endif
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#include <windows.h>
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#ifndef S_ISDIR
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#define S_ISDIR(x) (((x)&_S_IFDIR) == _S_IFDIR)
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#endif
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#endif
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#include "eval.h"
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#include "iopreds.h"
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static Int p_change_type_of_char(USES_REGS1);
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Term Yap_StringToNumberTerm(const char *s, encoding_t *encp) {
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CACHE_REGS
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int sno;
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Term t;
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sno = Yap_open_buf_read_stream(s, strlen(s), encp, MEM_BUF_USER);
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if (sno < 0)
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return FALSE;
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if (encp)
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GLOBAL_Stream[sno].encoding = *encp;
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else
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GLOBAL_Stream[sno].encoding = LOCAL_encoding;
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#ifdef __ANDROID__
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while (*s && isblank(*s) && Yap_wide_chtype(*s) == BS)
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s++;
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#endif
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t = Yap_scan_num(GLOBAL_Stream + sno);
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if (LOCAL_Error_TYPE == SYNTAX_ERROR)
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LOCAL_Error_TYPE = YAP_NO_ERROR;
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Yap_CloseStream(sno);
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return t;
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}
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const char *encvs[] = {"LANG", "LC_ALL", "LC_CTYPE", NULL};
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// where we can fins an encoding
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typedef struct enc_map {
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const char *s;
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encoding_t e;
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} enc_map_t;
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static enc_map_t ematches[] = {
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{"UTF-8", ENC_ISO_UTF8},
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{"utf8", ENC_ISO_UTF8},
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{"UTF-16", ENC_UTF16_LE}, // ok, this is a very bad name
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{"UCS-2", ENC_UTF16_LE}, // ok, this is probably gone by now
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{"ISO-LATIN1", ENC_ISO_LATIN1},
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{"ISO-8859-1", ENC_ISO_LATIN1},
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{"Windows-1252", ENC_ISO_LATIN1}, // almost, but not quite
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{"CP-1252", ENC_ISO_LATIN1},
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{"C", ENC_ISO_ASCII},
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#ifdef _WIN32
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{NULL, ENC_ISO_ASCII}
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#else
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{NULL, ENC_ISO_UTF8}
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#endif
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};
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static encoding_t enc_os_default(encoding_t rc) {
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// by default, return UTF-8
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// note that we match the C locale to UTF8/16, as all Unix machines will work
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// on UNICODE.
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// WIN32 we will rely on BOM
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if (rc == ENC_ISO_ASCII) {
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return ENC_ISO_UTF8;
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}
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return rc;
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}
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encoding_t Yap_SystemEncoding(void) {
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int i = -1;
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while (i == -1 || encvs[i]) {
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char *v;
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if (i == -1) {
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if ((v = setlocale(LC_CTYPE, NULL)) == NULL || !strcmp(v, "C")) {
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if ((v = getenv("LC_CTYPE")))
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setlocale(LC_CTYPE, v);
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else if ((v = getenv("LANG")))
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setlocale(LC_CTYPE, v);
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}
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} else {
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v = getenv(encvs[i]);
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}
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if (v) {
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int j = 0;
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const char *coding;
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while ((coding = ematches[j].s) != NULL) {
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char *v1;
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if ((v1 = strstr(v, coding)) && strlen(v1) == strlen(coding)) {
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return ematches[j].e;
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}
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j++;
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}
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}
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i++;
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}
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return ENC_ISO_ASCII;
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}
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static encoding_t DefaultEncoding(void) {
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return enc_os_default(Yap_SystemEncoding());
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}
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encoding_t Yap_DefaultEncoding(void) {
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CACHE_REGS
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return LOCAL_encoding;
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}
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void Yap_SetDefaultEncoding(encoding_t new_encoding) {
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CACHE_REGS
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LOCAL_encoding = new_encoding;
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}
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static Int get_default_encoding(USES_REGS1) {
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Term out = MkIntegerTerm(Yap_DefaultEncoding());
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return Yap_unify(ARG1, out);
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}
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static Int p_encoding(USES_REGS1) { /* '$encoding'(Stream,N) */
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int sno =
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Yap_CheckStream(ARG1, Input_Stream_f | Output_Stream_f, "encoding/2");
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Term t = Deref(ARG2);
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if (sno < 0)
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return FALSE;
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if (IsVarTerm(t)) {
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return Yap_unify(ARG2, MkIntegerTerm(GLOBAL_Stream[sno].encoding));
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}
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GLOBAL_Stream[sno].encoding = IntegerOfTerm(Deref(ARG2));
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UNLOCK(GLOBAL_Stream[sno].streamlock);
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return TRUE;
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}
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static int get_char(Term t) {
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if (IsVarTerm(t = Deref(t))) {
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Yap_Error(INSTANTIATION_ERROR, t, NULL);
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return 0;
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}
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if (!IsAtomTerm(t)) {
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Yap_Error(REPRESENTATION_ERROR_CHARACTER, t, NULL);
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return 0;
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}
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Atom at = AtomOfTerm(t);
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if (IsWideAtom(at)) {
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wchar_t *s0 = RepAtom(AtomOfTerm(t))->WStrOfAE;
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if (s0[1] != '\0') {
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Yap_Error(REPRESENTATION_ERROR_CHARACTER, t, NULL);
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return 0;
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}
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return s0[0];
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} else {
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char *s0 = RepAtom(AtomOfTerm(t))->StrOfAE;
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if (s0[1] != '\0') {
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Yap_Error(REPRESENTATION_ERROR_CHARACTER, t, NULL);
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return 0;
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}
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return s0[0];
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}
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return 0;
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}
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static int get_code(Term t) {
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if (IsVarTerm(t = Deref(t))) {
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Yap_Error(INSTANTIATION_ERROR, t, NULL);
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return 0;
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}
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if (!IsIntegerTerm(t)) {
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Yap_Error(TYPE_ERROR_CHARACTER_CODE, t, NULL);
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return 0;
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}
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Int ch = IntegerOfTerm(t);
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if (ch < -1) {
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Yap_Error(REPRESENTATION_ERROR_CHARACTER_CODE, t, NULL);
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return 0;
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}
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return ch;
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}
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static int get_char_or_code(Term t, bool *is_char) {
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if (!IsAtomTerm(t)) {
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if (!IsIntegerTerm(t)) {
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Yap_Error(TYPE_ERROR_CHARACTER, t, NULL);
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return 0;
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}
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Int ch = IntegerOfTerm(t);
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if (ch < -1) {
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Yap_Error(REPRESENTATION_ERROR_CHARACTER_CODE, t, NULL);
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return 0;
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}
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*is_char = false;
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return ch;
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}
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Atom at = AtomOfTerm(t);
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if (IsWideAtom(at)) {
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wchar_t *s0 = RepAtom(AtomOfTerm(t))->WStrOfAE;
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if (s0[1] != '\0') {
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Yap_Error(REPRESENTATION_ERROR_CHARACTER, t, NULL);
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return 0;
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}
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*is_char = true;
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return s0[0];
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} else {
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char *s0 = RepAtom(AtomOfTerm(t))->StrOfAE;
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if (s0[1] != '\0') {
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Yap_Error(REPRESENTATION_ERROR_CHARACTER, t, NULL);
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return 0;
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}
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*is_char = true;
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return s0[0];
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}
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return 0;
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}
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static Int toupper2(USES_REGS1) {
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bool is_char = false;
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Term t;
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if (!IsVarTerm(t = Deref(ARG1))) {
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Int out = get_char_or_code(t, &is_char), uout;
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if (out < 128)
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uout = toupper(out);
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else
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uout = utf8proc_toupper(out);
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if (is_char)
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return Yap_unify(ARG2, MkCharTerm(uout));
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else
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return Yap_unify(ARG2, MkIntegerTerm(uout));
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} else if (!IsVarTerm(t = Deref(ARG2))) {
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Int uout = get_char_or_code(t, &is_char), out;
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char_kind_t charp = Yap_wide_chtype(uout);
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if (charp == UC) {
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if (uout < 128)
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out = tolower(uout);
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else
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out = utf8proc_tolower(uout);
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} else {
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out = uout;
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}
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if (is_char)
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return Yap_unify(ARG1, MkCharTerm(out));
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else
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return Yap_unify(ARG1, MkIntegerTerm(out));
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} else {
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Yap_Error(INSTANTIATION_ERROR, ARG1, NULL);
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}
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return false;
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}
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static Int tolower2(USES_REGS1) {
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bool is_char = false;
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Term t;
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if (!IsVarTerm(t = Deref(ARG1))) {
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bool is_char = false;
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Int out = get_char_or_code(ARG1, &is_char), uout;
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if (out < 128)
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uout = tolower(out);
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else
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uout = utf8proc_tolower(out);
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if (is_char)
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return Yap_unify(ARG2, MkCharTerm(uout));
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else
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return Yap_unify(ARG2, MkIntegerTerm(uout));
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} else if (IsVarTerm(t = Deref(ARG2))) {
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Int uout = get_char_or_code(t, &is_char), out;
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char_kind_t charp = Yap_wide_chtype(uout);
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if (charp == LC) {
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if (uout < 128)
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out = toupper(uout);
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else
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out = utf8proc_toupper(uout);
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} else {
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out = uout;
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}
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if (is_char)
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return Yap_unify(ARG1, MkCharTerm(out));
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else
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return Yap_unify(ARG1, MkIntegerTerm(out));
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} else {
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Yap_Error(INSTANTIATION_ERROR, ARG1, NULL);
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}
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return false;
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}
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static Int
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p_change_type_of_char(USES_REGS1) { /* change_type_of_char(+char,+type) */
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Term t1 = Deref(ARG1);
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Term t2 = Deref(ARG2);
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if (!IsVarTerm(t1) && !IsIntegerTerm(t1))
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return FALSE;
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if (!IsVarTerm(t2) && !IsIntegerTerm(t2))
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return FALSE;
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Yap_chtype[IntegerOfTerm(t1)] = IntegerOfTerm(t2);
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return TRUE;
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}
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static Int char_type_alnum(USES_REGS1) {
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int ch = get_char(ARG1);
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char_kind_t k = Yap_wide_chtype(ch);
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return k == UC || k == LC || k == NU;
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}
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static Int char_type_alpha(USES_REGS1) {
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int ch = get_char(ARG1);
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char_kind_t k = Yap_wide_chtype(ch);
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return k == UC || k == LC;
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}
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static Int char_type_csym(USES_REGS1) {
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int ch = get_char(ARG1);
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char_kind_t k = Yap_wide_chtype(ch);
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return k >= UC && k <= NU;
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}
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static Int char_type_csymf(USES_REGS1) {
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int ch = get_char(ARG1);
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char_kind_t k = Yap_wide_chtype(ch);
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return k >= UC && k <= LC;
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}
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static Int char_type_ascii(USES_REGS1) {
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int ch = get_char(ARG1);
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return isascii(ch);
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}
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static Int char_type_white(USES_REGS1) {
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int ch = get_char(ARG1);
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if (ch < 256) {
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char_kind_t k = Yap_chtype[ch];
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return k == BS;
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}
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utf8proc_category_t ct = utf8proc_category(ch);
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return ct == UTF8PROC_CATEGORY_ZS;
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}
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static Int char_type_cntrl(USES_REGS1) {
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Int ch = get_char(ARG1);
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char_kind_t k = Yap_wide_chtype(ch);
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return k == BG;
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}
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static Int char_type_digit(USES_REGS1) {
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Int ch = get_char(ARG1);
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char_kind_t k = Yap_wide_chtype(ch);
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return k == NU;
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}
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static Int char_type_xdigit(USES_REGS1) {
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Int ch = get_char(ARG1);
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#if HAVE_ISWXDIGIT
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return iswxdigit(ch);
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#elif HAVE_ISWHEXNUMBER
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return iswhexnumber(ch);
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#else
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return iswdigit(ch) || ((ch >= 'a' && ch <= 'f') && (ch >= 'A' && ch <= 'F'));
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#endif
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}
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static Int char_type_graph(USES_REGS1) {
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Int ch = get_char(ARG1);
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return iswgraph(ch);
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}
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static Int char_type_lower(USES_REGS1) {
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int ch = get_char(ARG1);
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char_kind_t k = Yap_wide_chtype(ch);
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return k == LC;
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}
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static Int char_type_upper(USES_REGS1) {
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int ch = get_char(ARG1);
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char_kind_t k = Yap_wide_chtype(ch);
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return k == UC;
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}
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static Int char_type_punct(USES_REGS1) {
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int ch = get_char(ARG1);
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if (ch < 256) {
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char_kind_t k = Yap_chtype[ch];
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return k >= QT && k <= BK;
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}
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return false;
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}
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static Int char_type_space(USES_REGS1) {
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int ch = get_char(ARG1);
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if (ch < 256) {
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char_kind_t k = Yap_chtype[ch];
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return k == BS;
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}
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utf8proc_category_t ct = utf8proc_category(ch);
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return (ct >= UTF8PROC_CATEGORY_ZS && ct <= UTF8PROC_CATEGORY_PO);
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}
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static Int char_type_end_of_file(USES_REGS1) {
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Int ch = get_char(ARG1);
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return ch == WEOF || ch == -1;
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}
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static Int char_type_end_of_line(USES_REGS1) {
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Int ch = get_char(ARG1);
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if (ch < 256) {
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return ch >= 10 && ch <= 13;
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}
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utf8proc_category_t ct = utf8proc_category(ch);
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return (ct >= UTF8PROC_CATEGORY_ZL && ct <= UTF8PROC_CATEGORY_ZP);
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}
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static Int char_type_newline(USES_REGS1) {
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Int ch = get_char(ARG1);
|
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if (ch < 256) {
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return ch == 10;
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}
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return false;
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}
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|
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static Int char_type_period(USES_REGS1) {
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Int ch = get_char(ARG1);
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return ch == '.' || ch == '!' || ch == '?';
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}
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static Int char_type_quote(USES_REGS1) {
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Int ch = get_char(ARG1);
|
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utf8proc_category_t ct = utf8proc_category(ch);
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return ct == UTF8PROC_CATEGORY_PI || ct == UTF8PROC_CATEGORY_PF;
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}
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static Int char_type_paren(USES_REGS1) {
|
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Int ch = get_char(ARG1);
|
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utf8proc_category_t ct = utf8proc_category(ch);
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return ct == UTF8PROC_CATEGORY_PS || ct == UTF8PROC_CATEGORY_PE;
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}
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|
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static Int char_type_prolog_var_start(USES_REGS1) {
|
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Int ch = get_char(ARG1);
|
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char_kind_t k = Yap_wide_chtype(ch);
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return k == LC || ch == '_';
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}
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|
|
static Int char_type_prolog_atom_start(USES_REGS1) {
|
|
Int ch = get_char(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k == UC;
|
|
}
|
|
|
|
static Int char_type_prolog_identifier_continue(USES_REGS1) {
|
|
int ch = get_char(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k >= UC && k <= NU;
|
|
}
|
|
|
|
static Int char_type_prolog_prolog_symbol(USES_REGS1) {
|
|
int ch = get_char(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k == SL && k == SY;
|
|
}
|
|
|
|
static Int code_type_alnum(USES_REGS1) {
|
|
int ch = get_code(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k == UC || k == LC || k == NU;
|
|
}
|
|
|
|
static Int code_type_alpha(USES_REGS1) {
|
|
int ch = get_code(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k == UC || k == LC;
|
|
}
|
|
|
|
static Int code_type_csym(USES_REGS1) {
|
|
int ch = get_code(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k >= UC && k <= NU;
|
|
}
|
|
|
|
static Int code_type_csymf(USES_REGS1) {
|
|
int ch = get_code(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k >= UC && k <= LC;
|
|
}
|
|
|
|
static Int code_type_ascii(USES_REGS1) {
|
|
int ch = get_code(ARG1);
|
|
return isascii(ch);
|
|
}
|
|
|
|
static Int code_type_white(USES_REGS1) {
|
|
int ch = get_code(ARG1);
|
|
if (ch < 256) {
|
|
char_kind_t k = Yap_chtype[ch];
|
|
return k == BS;
|
|
}
|
|
utf8proc_category_t ct = utf8proc_category(ch);
|
|
return ct == UTF8PROC_CATEGORY_ZS;
|
|
}
|
|
|
|
static Int code_type_cntrl(USES_REGS1) {
|
|
Int ch = get_code(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k == BG;
|
|
}
|
|
|
|
static Int code_type_digit(USES_REGS1) {
|
|
Int ch = get_code(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k == NU;
|
|
}
|
|
|
|
static Int code_type_xdigit(USES_REGS1) {
|
|
Int ch = get_code(ARG1);
|
|
#if HAVE_ISWXDIGIT
|
|
return iswxdigit(ch);
|
|
#elif HAVE_ISWHEXNUMBER
|
|
return iswhexnumber(ch);
|
|
#else
|
|
return iswdigit(ch) || ((ch >= 'a' && ch <= 'f') && (ch >= 'A' && ch <= 'F'));
|
|
#endif
|
|
}
|
|
|
|
static Int code_type_graph(USES_REGS1) {
|
|
Int ch = get_code(ARG1);
|
|
return iswgraph(ch);
|
|
}
|
|
|
|
static Int code_type_lower(USES_REGS1) {
|
|
int ch = get_code(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k == LC;
|
|
}
|
|
|
|
static Int code_type_upper(USES_REGS1) {
|
|
int ch = get_code(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k == UC;
|
|
}
|
|
|
|
static Int code_type_punct(USES_REGS1) {
|
|
int ch = get_char(ARG1);
|
|
if (ch < 256) {
|
|
char_kind_t k = Yap_chtype[ch];
|
|
return k >= QT && k <= BK;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static Int code_type_space(USES_REGS1) {
|
|
int ch = get_code(ARG1);
|
|
if (ch < 256) {
|
|
char_kind_t k = Yap_chtype[ch];
|
|
return k == BS;
|
|
}
|
|
utf8proc_category_t ct = utf8proc_category(ch);
|
|
return (ct >= UTF8PROC_CATEGORY_ZS && ct <= UTF8PROC_CATEGORY_PO);
|
|
}
|
|
|
|
static Int code_type_end_of_file(USES_REGS1) {
|
|
Int ch = get_code(ARG1);
|
|
return ch == WEOF || ch == -1;
|
|
}
|
|
|
|
static Int code_type_end_of_line(USES_REGS1) {
|
|
Int ch = get_code(ARG1);
|
|
if (ch < 256) {
|
|
return ch >= 10 && ch <= 13;
|
|
}
|
|
utf8proc_category_t ct = utf8proc_category(ch);
|
|
return (ct >= UTF8PROC_CATEGORY_ZL && ct <= UTF8PROC_CATEGORY_ZP);
|
|
}
|
|
|
|
static Int code_type_newline(USES_REGS1) {
|
|
Int ch = get_code(ARG1);
|
|
if (ch < 256) {
|
|
return ch == 10;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static Int code_type_period(USES_REGS1) {
|
|
Int ch = get_code(ARG1);
|
|
return ch == '.' || ch == '!' || ch == '?';
|
|
}
|
|
|
|
static Int code_type_quote(USES_REGS1) {
|
|
Int ch = get_code(ARG1);
|
|
utf8proc_category_t ct = utf8proc_category(ch);
|
|
return ct == UTF8PROC_CATEGORY_PI || ct == UTF8PROC_CATEGORY_PF;
|
|
}
|
|
|
|
static Int code_type_paren(USES_REGS1) {
|
|
Int ch = get_code(ARG1);
|
|
utf8proc_category_t ct = utf8proc_category(ch);
|
|
return ct == UTF8PROC_CATEGORY_PS || ct == UTF8PROC_CATEGORY_PE;
|
|
}
|
|
|
|
static Int code_type_prolog_var_start(USES_REGS1) {
|
|
Int ch = get_code(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k == LC || ch == '_';
|
|
}
|
|
|
|
static Int code_type_prolog_atom_start(USES_REGS1) {
|
|
Int ch = get_code(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k == UC;
|
|
}
|
|
|
|
static Int code_type_prolog_identifier_continue(USES_REGS1) {
|
|
int ch = get_code(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k >= UC && k <= NU;
|
|
}
|
|
|
|
static Int code_type_prolog_prolog_symbol(USES_REGS1) {
|
|
int ch = get_code(ARG1);
|
|
char_kind_t k = Yap_wide_chtype(ch);
|
|
return k == SL && k == SY;
|
|
}
|
|
|
|
int ISOWGetc(int sno) {
|
|
int ch = GLOBAL_Stream[sno].stream_wgetc(sno);
|
|
if (ch != EOF && GLOBAL_CharConversionTable != NULL) {
|
|
|
|
if (ch < NUMBER_OF_CHARS) {
|
|
/* only do this in ASCII */
|
|
return GLOBAL_CharConversionTable[ch];
|
|
}
|
|
}
|
|
return ch;
|
|
}
|
|
|
|
static Int p_force_char_conversion(USES_REGS1) {
|
|
int i;
|
|
|
|
/* don't actually enable it until someone tries to add a conversion */
|
|
if (GLOBAL_CharConversionTable2 == NULL)
|
|
return (TRUE);
|
|
for (i = 0; i < MaxStreams; i++) {
|
|
if (!(GLOBAL_Stream[i].status & Free_Stream_f))
|
|
GLOBAL_Stream[i].stream_wgetc_for_read = ISOWGetc;
|
|
}
|
|
GLOBAL_CharConversionTable = GLOBAL_CharConversionTable2;
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int p_disable_char_conversion(USES_REGS1) {
|
|
int i;
|
|
|
|
for (i = 0; i < MaxStreams; i++) {
|
|
if (!(GLOBAL_Stream[i].status & Free_Stream_f))
|
|
GLOBAL_Stream[i].stream_wgetc_for_read = GLOBAL_Stream[i].stream_wgetc;
|
|
}
|
|
GLOBAL_CharConversionTable = NULL;
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int char_conversion(USES_REGS1) {
|
|
Term t = Deref(ARG1), t1 = Deref(ARG2);
|
|
unsigned char *s0, *s1;
|
|
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR, t, "char_conversion/2");
|
|
return (FALSE);
|
|
}
|
|
if (!IsAtomTerm(t)) {
|
|
Yap_Error(REPRESENTATION_ERROR_CHARACTER, t, "char_conversion/2");
|
|
return (FALSE);
|
|
}
|
|
s0 = RepAtom(AtomOfTerm(t))->UStrOfAE;
|
|
if (s0[1] != '\0') {
|
|
Yap_Error(REPRESENTATION_ERROR_CHARACTER, t, "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))->UStrOfAE;
|
|
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 (GLOBAL_CharConversionTable2 == NULL) {
|
|
int i;
|
|
|
|
/* don't create a table if we don't need to */
|
|
if (s0[0] == s1[0])
|
|
return (TRUE);
|
|
GLOBAL_CharConversionTable2 =
|
|
Yap_AllocCodeSpace(NUMBER_OF_CHARS * sizeof(char));
|
|
while (GLOBAL_CharConversionTable2 == NULL) {
|
|
if (!Yap_growheap(FALSE, NUMBER_OF_CHARS * sizeof(char), NULL)) {
|
|
Yap_Error(RESOURCE_ERROR_HEAP, TermNil, LOCAL_ErrorMessage);
|
|
return (FALSE);
|
|
}
|
|
}
|
|
if (trueGlobalPrologFlag(CHAR_CONVERSION_FLAG)) {
|
|
CACHE_REGS
|
|
if (p_force_char_conversion(PASS_REGS1) == FALSE)
|
|
return (FALSE);
|
|
}
|
|
for (i = 0; i < NUMBER_OF_CHARS; i++)
|
|
GLOBAL_CharConversionTable2[i] = i;
|
|
}
|
|
/* just add the new entry */
|
|
GLOBAL_CharConversionTable2[(int)s0[0]] = s1[0];
|
|
/* done */
|
|
return (TRUE);
|
|
}
|
|
|
|
static Int p_current_char_conversion(USES_REGS1) {
|
|
Term t, t1;
|
|
unsigned char *s0, *s1;
|
|
|
|
if (GLOBAL_CharConversionTable == NULL) {
|
|
return (FALSE);
|
|
}
|
|
t = Deref(ARG1);
|
|
if (IsVarTerm(t)) {
|
|
Yap_Error(INSTANTIATION_ERROR, t, "current_char_conversion/2");
|
|
return (FALSE);
|
|
}
|
|
if (!IsAtomTerm(t)) {
|
|
Yap_Error(REPRESENTATION_ERROR_CHARACTER, t, "current_char_conversion/2");
|
|
return (FALSE);
|
|
}
|
|
s0 = RepAtom(AtomOfTerm(t))->UStrOfAE;
|
|
if (s0[1] != '\0') {
|
|
Yap_Error(REPRESENTATION_ERROR_CHARACTER, t, "current_char_conversion/2");
|
|
return (FALSE);
|
|
}
|
|
t1 = Deref(ARG2);
|
|
if (IsVarTerm(t1)) {
|
|
char out[2];
|
|
if (GLOBAL_CharConversionTable[(int)s0[0]] == '\0')
|
|
return (FALSE);
|
|
out[0] = GLOBAL_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))->UStrOfAE;
|
|
if (s1[1] != '\0') {
|
|
Yap_Error(REPRESENTATION_ERROR_CHARACTER, t1, "current_char_conversion/2");
|
|
return (FALSE);
|
|
} else {
|
|
return (GLOBAL_CharConversionTable[(int)s0[0]] == '\0' &&
|
|
GLOBAL_CharConversionTable[(int)s0[0]] == s1[0]);
|
|
}
|
|
}
|
|
|
|
static Int p_all_char_conversions(USES_REGS1) {
|
|
Term out = TermNil;
|
|
int i;
|
|
|
|
if (GLOBAL_CharConversionTable == NULL) {
|
|
return (FALSE);
|
|
}
|
|
for (i = NUMBER_OF_CHARS; i > 0;) {
|
|
i--;
|
|
if (GLOBAL_CharConversionTable[i] != '\0') {
|
|
Term t1, t2;
|
|
char s[2];
|
|
s[1] = '\0';
|
|
s[0] = GLOBAL_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));
|
|
}
|
|
|
|
void Yap_InitChtypes(void) {
|
|
CACHE_REGS
|
|
LOCAL_encoding = DefaultEncoding();
|
|
Yap_InitCPred("$change_type_of_char", 2, p_change_type_of_char,
|
|
SafePredFlag | SyncPredFlag | HiddenPredFlag);
|
|
Yap_InitCPred("toupper", 2, toupper2, SafePredFlag);
|
|
Yap_InitCPred("tolower", 2, tolower2, SafePredFlag);
|
|
Yap_InitCPred("char_conversion", 2, char_conversion, SyncPredFlag);
|
|
|
|
Yap_InitCPred("$get_default_encoding", 1, get_default_encoding,
|
|
SafePredFlag | HiddenPredFlag);
|
|
|
|
Yap_InitCPred("$encoding", 2, p_encoding, SafePredFlag | 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);
|
|
CurrentModule = CHTYPE_MODULE;
|
|
Yap_InitCPred("char_type_alnum", 1, char_type_alnum, SafePredFlag);
|
|
Yap_InitCPred("char_type_alpha", 1, char_type_alpha, SafePredFlag);
|
|
Yap_InitCPred("char_type_csym", 1, char_type_csym, SafePredFlag);
|
|
Yap_InitCPred("char_type_csymf", 1, char_type_csymf, SafePredFlag);
|
|
Yap_InitCPred("char_type_ascii", 1, char_type_ascii, SafePredFlag);
|
|
Yap_InitCPred("char_type_white", 1, char_type_white, SafePredFlag);
|
|
Yap_InitCPred("char_type_cntrl", 1, char_type_cntrl, SafePredFlag);
|
|
Yap_InitCPred("char_type_digit", 1, char_type_digit, SafePredFlag);
|
|
Yap_InitCPred("char_type_xdigit", 1, char_type_xdigit, SafePredFlag);
|
|
Yap_InitCPred("char_type_graph", 1, char_type_graph, SafePredFlag);
|
|
Yap_InitCPred("char_type_lower", 1, char_type_lower, SafePredFlag);
|
|
Yap_InitCPred("char_type_upper", 1, char_type_upper, SafePredFlag);
|
|
Yap_InitCPred("char_type_punct", 1, char_type_punct, SafePredFlag);
|
|
Yap_InitCPred("char_type_space", 1, char_type_space, SafePredFlag);
|
|
Yap_InitCPred("char_type_end_of_file", 1, char_type_end_of_file,
|
|
SafePredFlag);
|
|
Yap_InitCPred("char_type_end_of_line", 1, char_type_end_of_line,
|
|
SafePredFlag);
|
|
Yap_InitCPred("char_type_newline", 1, char_type_newline, SafePredFlag);
|
|
Yap_InitCPred("char_type_period", 1, char_type_period, SafePredFlag);
|
|
Yap_InitCPred("char_type_quote", 1, char_type_quote, SafePredFlag);
|
|
Yap_InitCPred("char_type_paren", 1, char_type_paren, SafePredFlag);
|
|
Yap_InitCPred("char_type_prolog_var_start", 1, char_type_prolog_var_start,
|
|
SafePredFlag);
|
|
Yap_InitCPred("char_type_prolog_atom_start", 1, char_type_prolog_atom_start,
|
|
SafePredFlag);
|
|
Yap_InitCPred("char_type_prolog_identifier_continue", 1,
|
|
char_type_prolog_identifier_continue, SafePredFlag);
|
|
Yap_InitCPred("char_type_prolog_prolog_symbol", 1,
|
|
char_type_prolog_prolog_symbol, SafePredFlag);
|
|
Yap_InitCPred("code_type_alnum", 1, code_type_alnum, SafePredFlag);
|
|
Yap_InitCPred("code_type_alpha", 1, code_type_alpha, SafePredFlag);
|
|
Yap_InitCPred("code_type_csym", 1, code_type_csym, SafePredFlag);
|
|
Yap_InitCPred("code_type_csymf", 1, code_type_csymf, SafePredFlag);
|
|
Yap_InitCPred("code_type_ascii", 1, code_type_ascii, SafePredFlag);
|
|
Yap_InitCPred("code_type_white", 1, code_type_white, SafePredFlag);
|
|
Yap_InitCPred("code_type_cntrl", 1, code_type_cntrl, SafePredFlag);
|
|
Yap_InitCPred("code_type_digit", 1, code_type_digit, SafePredFlag);
|
|
Yap_InitCPred("code_type_xdigit", 1, code_type_xdigit, SafePredFlag);
|
|
Yap_InitCPred("code_type_graph", 1, code_type_graph, SafePredFlag);
|
|
Yap_InitCPred("code_type_lower", 1, code_type_lower, SafePredFlag);
|
|
Yap_InitCPred("code_type_upper", 1, code_type_upper, SafePredFlag);
|
|
Yap_InitCPred("code_type_punct", 1, code_type_punct, SafePredFlag);
|
|
Yap_InitCPred("code_type_space", 1, code_type_space, SafePredFlag);
|
|
Yap_InitCPred("code_type_end_of_file", 1, code_type_end_of_file,
|
|
SafePredFlag);
|
|
Yap_InitCPred("code_type_end_of_line", 1, code_type_end_of_line,
|
|
SafePredFlag);
|
|
Yap_InitCPred("code_type_newline", 1, code_type_newline, SafePredFlag);
|
|
Yap_InitCPred("code_type_period", 1, code_type_period, SafePredFlag);
|
|
Yap_InitCPred("code_type_quote", 1, code_type_quote, SafePredFlag);
|
|
Yap_InitCPred("code_type_paren", 1, code_type_paren, SafePredFlag);
|
|
Yap_InitCPred("code_type_prolog_var_start", 1, code_type_prolog_var_start,
|
|
SafePredFlag);
|
|
Yap_InitCPred("code_type_prolog_atom_start", 1, code_type_prolog_atom_start,
|
|
SafePredFlag);
|
|
Yap_InitCPred("code_type_prolog_identifier_continue", 1,
|
|
code_type_prolog_identifier_continue, SafePredFlag);
|
|
Yap_InitCPred("code_type_prolog_prolog_symbol", 1,
|
|
code_type_prolog_prolog_symbol, SafePredFlag);
|
|
CurrentModule = PROLOG_MODULE;
|
|
}
|