1282 lines
29 KiB
C
1282 lines
29 KiB
C
/* $Id$
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Part of SWI-Prolog
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Author: Jan Wielemaker and Anjo Anjewierden
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E-mail: jan@swi.psy.uva.nl
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WWW: http://www.swi-prolog.org
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Copyright (C): 1985-2002, University of Amsterdam
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "pl-incl.h"
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#include "pl-ctype.h"
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#include "pl-utf8.h"
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#include "pl-codelist.h"
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#include <errno.h>
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#include <stdio.h>
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#if HAVE_LIMITS_H
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#include <limits.h> /* solaris compatibility */
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#endif
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#undef LD
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#define LD LOCAL_LD
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/*******************************
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* UNIFIED TEXT STUFF *
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*******************************/
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static inline size_t
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bufsize_text(PL_chars_t *text, size_t len)
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{ size_t unit;
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switch(text->encoding)
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{ case ENC_ISO_LATIN_1:
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case ENC_ASCII:
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case ENC_UTF8:
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case ENC_ANSI:
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unit = sizeof(char);
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break;
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case ENC_WCHAR:
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unit = sizeof(pl_wchar_t);
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break;
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default:
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assert(0);
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unit = sizeof(char); /*NOTREACHED*/
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}
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return len*unit;
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}
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void
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PL_save_text(PL_chars_t *text, int flags)
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{ if ( (flags & BUF_MALLOC) && text->storage != PL_CHARS_MALLOC )
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{ size_t bl = bufsize_text(text, text->length+1);
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void *new = PL_malloc(bl);
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memcpy(new, text->text.t, bl);
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text->text.t = new;
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text->storage = PL_CHARS_MALLOC;
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} else if ( text->storage == PL_CHARS_LOCAL )
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{ Buffer b = findBuffer(BUF_RING);
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size_t bl = bufsize_text(text, text->length+1);
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addMultipleBuffer(b, text->text.t, bl, char);
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text->text.t = baseBuffer(b, char);
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text->storage = PL_CHARS_RING;
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} else if ( text->storage == PL_CHARS_MALLOC )
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{ Buffer b = findBuffer(BUF_RING);
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size_t bl = bufsize_text(text, text->length+1);
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addMultipleBuffer(b, text->text.t, bl, char);
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PL_free_text(text);
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text->text.t = baseBuffer(b, char);
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text->storage = PL_CHARS_RING;
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}
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}
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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PL_from_stack_text() moves a string from the stack, so it won't get
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corrupted if GC/shift comes along.
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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static void
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PL_from_stack_text(PL_chars_t *text)
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{ if ( text->storage == PL_CHARS_STACK )
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{ size_t bl = bufsize_text(text, text->length+1);
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if ( bl < sizeof(text->buf) )
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{ memcpy(text->buf, text->text.t, bl);
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text->text.t = text->buf;
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text->storage = PL_CHARS_LOCAL;
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} else
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{ Buffer b = findBuffer(BUF_RING);
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addMultipleBuffer(b, text->text.t, bl, char);
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text->text.t = baseBuffer(b, char);
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text->storage = PL_CHARS_RING;
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}
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}
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}
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#define INT64_DIGITS 20
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static char *
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ui64toa(uint64_t val, char *out)
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{ char tmpBuf[INT64_DIGITS + 1];
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char *ptrOrg = tmpBuf + INT64_DIGITS;
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char *ptr = ptrOrg;
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size_t nbDigs;
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do
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{ int rem = val % 10;
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*--ptr = rem + '0';
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val /= 10;
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} while ( val );
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nbDigs = ptrOrg - ptr;
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memcpy(out, ptr, nbDigs);
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out += nbDigs;
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*out = '\0';
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return out; /* points to the END */
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};
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static char *
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i64toa(int64_t val, char *out)
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{ if ( val < 0 )
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{ *out++ = '-';
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val = -val;
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}
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return ui64toa((uint64_t)val, out);
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}
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int
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PL_get_text__LD(term_t l, PL_chars_t *text, int flags ARG_LD)
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{ word w = valHandle(l);
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if ( (flags & CVT_ATOM) && isAtom(w) )
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#if __YAP_PROLOG__
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{ if ( !get_atom_ptr_text(AtomOfTerm(w), text) )
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#else
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{ if ( !get_atom_text(w, text) )
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#endif
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goto maybe_write;
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} else if ( (flags & CVT_STRING) && isString(w) )
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{ if ( !get_string_text(w, text PASS_LD) )
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goto maybe_write;
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PL_from_stack_text(text);
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} else if ( (flags & CVT_INTEGER) && isInteger(w) )
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{ number n;
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PL_get_number(l, &n);
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switch(n.type)
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{ case V_INTEGER:
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{ char *ep = i64toa(n.value.i, text->buf);
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text->text.t = text->buf;
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text->length = ep-text->text.t;
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text->storage = PL_CHARS_LOCAL;
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break;
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}
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#ifdef O_GMP
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case V_MPZ:
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{ size_t sz = mpz_sizeinbase(n.value.mpz, 10) + 2;
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Buffer b = findBuffer(BUF_RING);
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if ( !growBuffer(b, sz) )
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outOfCore();
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mpz_get_str(b->base, 10, n.value.mpz);
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b->top = b->base + strlen(b->base);
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text->text.t = baseBuffer(b, char);
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text->length = entriesBuffer(b, char);
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text->storage = PL_CHARS_RING;
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break;
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}
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#endif
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default:
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assert(0);
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}
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text->encoding = ENC_ISO_LATIN_1;
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text->canonical = TRUE;
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} else if ( (flags & CVT_FLOAT) && isFloat(w) )
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{ format_float(valFloat(w), text->buf);
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text->text.t = text->buf;
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text->length = strlen(text->text.t);
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text->encoding = ENC_ISO_LATIN_1;
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text->storage = PL_CHARS_LOCAL;
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text->canonical = TRUE;
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} else if ( (flags & CVT_LIST) )
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{ Buffer b;
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CVT_result result;
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if ( (b = codes_or_chars_to_buffer(l, BUF_RING, FALSE, &result)) )
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{ text->length = entriesBuffer(b, char);
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addBuffer(b, EOS, char);
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text->text.t = baseBuffer(b, char);
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text->encoding = ENC_ISO_LATIN_1;
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} else if ( result.status == CVT_wide &&
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(b = codes_or_chars_to_buffer(l, BUF_RING, TRUE, &result)) )
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{ text->length = entriesBuffer(b, pl_wchar_t);
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addBuffer(b, EOS, pl_wchar_t);
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text->text.w = baseBuffer(b, pl_wchar_t);
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text->encoding = ENC_WCHAR;
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} else if ( (flags & (CVT_WRITE|CVT_WRITE_CANONICAL)) )
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{ goto case_write;
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} else
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{ if ( (flags & CVT_VARNOFAIL) && result.status == CVT_partial )
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return 2;
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if ( (flags & CVT_EXCEPTION) )
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{ switch(result.status)
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{ case CVT_partial:
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return PL_error(NULL, 0, NULL, ERR_INSTANTIATION);
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case CVT_nolist:
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goto error;
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case CVT_nocode:
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case CVT_nochar:
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{ term_t culprit = PL_new_term_ref();
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atom_t type;
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#if __YAP_PROLOG__
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YAP_PutInSlot(culprit, result.culprit);
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#else
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*valTermRef(culprit) = result.culprit;
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#endif
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if ( result.status == CVT_nocode )
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type = ATOM_character_code;
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else
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type = ATOM_character;
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return PL_error(NULL, 0, NULL, ERR_TYPE, type, culprit);
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}
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default:
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break;
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}
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}
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goto error;
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}
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text->storage = PL_CHARS_RING;
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text->canonical = TRUE;
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} else if ( (flags & CVT_VARIABLE) && isVar(w) )
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{ text->text.t = varName(l, text->buf);
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text->length = strlen(text->text.t);
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text->encoding = ENC_ISO_LATIN_1;
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text->storage = PL_CHARS_LOCAL;
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text->canonical = TRUE;
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} else if ( (flags & (CVT_WRITE|CVT_WRITE_CANONICAL)) )
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{ IOENC encodings[3];
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IOENC *enc;
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char *r;
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int wflags;
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case_write:
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encodings[0] = ENC_ISO_LATIN_1;
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encodings[1] = ENC_WCHAR;
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encodings[2] = ENC_UNKNOWN;
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if ( (flags&CVT_WRITEQ) == CVT_WRITEQ )
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wflags = PL_WRT_QUOTED|PL_WRT_NUMBERVARS;
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else if ( (flags&CVT_WRITE_CANONICAL) )
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wflags = PL_WRT_QUOTED|PL_WRT_IGNOREOPS|PL_WRT_NUMBERVARS;
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else
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wflags = PL_WRT_NUMBERVARS;
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for(enc = encodings; *enc != ENC_UNKNOWN; enc++)
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{ size_t size;
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IOSTREAM *fd;
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r = text->buf;
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size = sizeof(text->buf);
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fd = Sopenmem(&r, &size, "w");
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fd->encoding = *enc;
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if ( PL_write_term(fd, l, 1200, wflags) &&
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Sputcode(EOS, fd) >= 0 &&
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Sflush(fd) >= 0 )
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{ text->encoding = *enc;
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text->storage = (r == text->buf ? PL_CHARS_LOCAL : PL_CHARS_MALLOC);
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text->canonical = TRUE;
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if ( *enc == ENC_ISO_LATIN_1 )
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{ text->length = size-1;
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text->text.t = r;
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} else
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{ text->length = (size/sizeof(pl_wchar_t))-1;
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text->text.w = (pl_wchar_t *)r;
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}
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Sclose(fd);
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return TRUE;
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} else
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{ Sclose(fd);
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if ( r != text->buf )
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Sfree(r);
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}
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}
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goto error;
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} else
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{ goto error;
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}
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succeed;
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maybe_write:
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if ( (flags & (CVT_WRITE|CVT_WRITE_CANONICAL)) )
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goto case_write;
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error:
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if ( canBind(w) && (flags & CVT_VARNOFAIL) )
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return 2;
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if ( (flags & CVT_EXCEPTION) )
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{ atom_t expected;
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if ( (flags & CVT_LIST) && !(flags&(CVT_ATOM|CVT_NUMBER)) )
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expected = ATOM_list; /* List and/or string object */
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else if ( flags & CVT_LIST )
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expected = ATOM_text;
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else if ( flags & CVT_NUMBER )
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expected = ATOM_atomic;
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else
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expected = ATOM_atom;
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return PL_error(NULL, 0, NULL, ERR_TYPE, expected, l);
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}
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fail;
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}
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atom_t
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textToAtom(PL_chars_t *text)
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{ if ( !PL_canonise_text(text) )
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return 0;
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if ( text->encoding == ENC_ISO_LATIN_1 )
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{ return lookupAtom(text->text.t, text->length);
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} else
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{ return lookupUCSAtom(text->text.w, text->length);
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}
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}
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word
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textToString(PL_chars_t *text)
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{ if ( !PL_canonise_text(text) )
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return 0;
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if ( text->encoding == ENC_ISO_LATIN_1 )
|
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{ return globalString(text->length, text->text.t);
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} else
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{ return globalWString(text->length, text->text.w);
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}
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}
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int
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PL_unify_text(term_t term, term_t tail, PL_chars_t *text, int type)
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{ switch(type)
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{ case PL_ATOM:
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{ atom_t a = textToAtom(text);
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if ( a )
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{ int rval = _PL_unify_atomic(term, a);
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PL_unregister_atom(a);
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return rval;
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}
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return FALSE;
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}
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case PL_STRING:
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{ word w = textToString(text);
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|
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if ( w )
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return _PL_unify_atomic(term, w);
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else
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return FALSE;
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}
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case PL_CODE_LIST:
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case PL_CHAR_LIST:
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{ if ( text->length == 0 )
|
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{ if ( tail )
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{ GET_LD
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PL_put_term(tail, term);
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return TRUE;
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} else
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{ return PL_unify_nil(term);
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}
|
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} else
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{ GET_LD
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term_t l = PL_new_term_ref();
|
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Word p0, p;
|
|
|
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switch(text->encoding)
|
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{ case ENC_ISO_LATIN_1:
|
|
{ const unsigned char *s = (const unsigned char *)text->text.t;
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const unsigned char *e = &s[text->length];
|
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|
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if ( !(p0 = p = INIT_SEQ_STRING(text->length)) )
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return FALSE;
|
|
|
|
if ( type == PL_CODE_LIST ) {
|
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for( ; s < e; s++)
|
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p = EXTEND_SEQ_CODES(p, *s);
|
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} else {
|
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for( ; s < e; s++)
|
|
p = EXTEND_SEQ_CHARS(p, *s);
|
|
}
|
|
break;
|
|
}
|
|
case ENC_WCHAR:
|
|
{ const pl_wchar_t *s = (const pl_wchar_t *)text->text.t;
|
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const pl_wchar_t *e = &s[text->length];
|
|
|
|
if ( !(p0 = p = INIT_SEQ_STRING(text->length)) )
|
|
return FALSE;
|
|
|
|
if ( type == PL_CODE_LIST ) {
|
|
for( ; s < e; s++)
|
|
p = EXTEND_SEQ_CODES(p, *s);
|
|
} else {
|
|
for( ; s < e; s++)
|
|
p = EXTEND_SEQ_CHARS(p, *s);
|
|
}
|
|
break;
|
|
}
|
|
case ENC_UTF8:
|
|
{ const char *s = text->text.t;
|
|
const char *e = &s[text->length];
|
|
size_t len = utf8_strlen(s, text->length);
|
|
|
|
if ( !(p0 = p = INIT_SEQ_STRING(len)) )
|
|
return FALSE;
|
|
|
|
if ( type == PL_CODE_LIST ) {
|
|
while (s < e) {
|
|
int chr;
|
|
|
|
s = utf8_get_char(s, &chr);
|
|
p = EXTEND_SEQ_CODES(p, chr);
|
|
}
|
|
} else {
|
|
while (s < e) {
|
|
int chr;
|
|
|
|
s = utf8_get_char(s, &chr);
|
|
p = EXTEND_SEQ_CHARS(p, chr);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case ENC_ANSI:
|
|
{ const char *s = text->text.t;
|
|
size_t rc, n = text->length;
|
|
size_t len = 0;
|
|
mbstate_t mbs;
|
|
wchar_t wc;
|
|
|
|
memset(&mbs, 0, sizeof(mbs));
|
|
while( n > 0 )
|
|
{ if ( (rc=mbrtowc(&wc, s, n, &mbs)) == (size_t)-1 || rc == 0 )
|
|
return PL_error(NULL, 0, "cannot represent text in current locale",
|
|
ERR_REPRESENTATION, ATOM_encoding);
|
|
|
|
len++;
|
|
n -= rc;
|
|
s += rc;
|
|
}
|
|
|
|
if ( !(p0 = p = INIT_SEQ_STRING(len)) )
|
|
return FALSE;
|
|
|
|
n = text->length;
|
|
s = text->text.t;
|
|
memset(&mbs, 0, sizeof(mbs));
|
|
while(n > 0)
|
|
{ rc = mbrtowc(&wc, s, n, &mbs);
|
|
|
|
if ( type == PL_CODE_LIST )
|
|
p = EXTEND_SEQ_CODES(p, wc);
|
|
else
|
|
p = EXTEND_SEQ_CHARS(p, wc);
|
|
|
|
s += rc;
|
|
n -= rc;
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
{ assert(0);
|
|
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
return CLOSE_SEQ_STRING(p, p0, tail, term, l );
|
|
}
|
|
}
|
|
default:
|
|
{ assert(0);
|
|
|
|
return FALSE;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
int
|
|
PL_unify_text_range(term_t term, PL_chars_t *text,
|
|
size_t offset, size_t len, int type)
|
|
{ if ( offset == 0 && len == text->length )
|
|
{ return PL_unify_text(term, 0, text, type);
|
|
} else
|
|
{ PL_chars_t sub;
|
|
int rc;
|
|
|
|
if ( offset > text->length || offset + len > text->length )
|
|
return FALSE;
|
|
|
|
if ( len == 1 && type == PL_ATOM )
|
|
{ GET_LD
|
|
int c;
|
|
|
|
if ( text->encoding == ENC_ISO_LATIN_1 )
|
|
c = text->text.t[offset]&0xff;
|
|
else
|
|
c = text->text.w[offset];
|
|
|
|
return PL_unify_atom(term, codeToAtom(c));
|
|
}
|
|
|
|
sub.length = len;
|
|
sub.storage = PL_CHARS_HEAP;
|
|
if ( text->encoding == ENC_ISO_LATIN_1 )
|
|
{ sub.text.t = text->text.t+offset;
|
|
sub.encoding = ENC_ISO_LATIN_1;
|
|
sub.canonical = TRUE;
|
|
} else
|
|
{ sub.text.w = text->text.w+offset;
|
|
sub.encoding = ENC_WCHAR;
|
|
sub.canonical = FALSE;
|
|
}
|
|
|
|
rc = PL_unify_text(term, 0, &sub, type);
|
|
|
|
PL_free_text(&sub);
|
|
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
|
|
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
|
int PL_promote_text(PL_chars_t *text)
|
|
|
|
Promote a text to USC if it is currently 8-bit text.
|
|
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
|
|
|
|
int
|
|
PL_promote_text(PL_chars_t *text)
|
|
{ if ( text->encoding != ENC_WCHAR )
|
|
{ if ( text->storage == PL_CHARS_MALLOC )
|
|
{ pl_wchar_t *new = PL_malloc(sizeof(pl_wchar_t)*(text->length+1));
|
|
pl_wchar_t *t = new;
|
|
const unsigned char *s = (const unsigned char *)text->text.t;
|
|
const unsigned char *e = &s[text->length];
|
|
|
|
while(s<e)
|
|
{ *t++ = *s++;
|
|
}
|
|
*t = EOS;
|
|
|
|
PL_free(text->text.t);
|
|
text->text.w = new;
|
|
|
|
text->encoding = ENC_WCHAR;
|
|
} else if ( text->storage == PL_CHARS_LOCAL &&
|
|
(text->length+1)*sizeof(pl_wchar_t) < sizeof(text->buf) )
|
|
{ unsigned char buf[sizeof(text->buf)];
|
|
unsigned char *f = buf;
|
|
unsigned char *e = &buf[text->length];
|
|
pl_wchar_t *t = (pl_wchar_t*)text->buf;
|
|
|
|
memcpy(buf, text->buf, text->length*sizeof(char));
|
|
while(f<e)
|
|
{ *t++ = *f++;
|
|
}
|
|
*t = EOS;
|
|
text->encoding = ENC_WCHAR;
|
|
} else
|
|
{ Buffer b = findBuffer(BUF_RING);
|
|
const unsigned char *s = (const unsigned char *)text->text.t;
|
|
const unsigned char *e = &s[text->length];
|
|
|
|
for( ; s<e; s++)
|
|
addBuffer(b, *s, pl_wchar_t);
|
|
addBuffer(b, EOS, pl_wchar_t);
|
|
|
|
text->text.w = baseBuffer(b, pl_wchar_t);
|
|
text->encoding = ENC_WCHAR;
|
|
text->storage = PL_CHARS_RING;
|
|
}
|
|
}
|
|
|
|
succeed;
|
|
}
|
|
|
|
|
|
int
|
|
PL_demote_text(PL_chars_t *text)
|
|
{ if ( text->encoding != ENC_ISO_LATIN_1 )
|
|
{ if ( text->storage == PL_CHARS_MALLOC )
|
|
{ char *new = PL_malloc(sizeof(char)*(text->length+1));
|
|
char *t = new;
|
|
const pl_wchar_t *s = (const pl_wchar_t *)text->text.t;
|
|
const pl_wchar_t *e = &s[text->length];
|
|
|
|
while(s<e)
|
|
{ if ( *s > 0xff )
|
|
{ PL_free(new);
|
|
return FALSE;
|
|
}
|
|
*t++ = *s++ & 0xff;
|
|
}
|
|
*t = EOS;
|
|
|
|
PL_free(text->text.t);
|
|
text->text.t = new;
|
|
|
|
text->encoding = ENC_ISO_LATIN_1;
|
|
} else if ( text->storage == PL_CHARS_LOCAL )
|
|
{ pl_wchar_t buf[sizeof(text->buf)/sizeof(pl_wchar_t)];
|
|
pl_wchar_t *f = buf;
|
|
pl_wchar_t *e = &buf[text->length];
|
|
char *t = text->buf;
|
|
|
|
memcpy(buf, text->buf, text->length*sizeof(pl_wchar_t));
|
|
while(f<e)
|
|
{ if ( *f > 0xff )
|
|
return FALSE;
|
|
*t++ = *f++ & 0xff;
|
|
}
|
|
*t = EOS;
|
|
text->encoding = ENC_ISO_LATIN_1;
|
|
} else
|
|
{ Buffer b = findBuffer(BUF_RING);
|
|
const pl_wchar_t *s = (const pl_wchar_t*)text->text.w;
|
|
const pl_wchar_t *e = &s[text->length];
|
|
|
|
for( ; s<e; s++)
|
|
{ if ( *s > 0xff )
|
|
{ unfindBuffer(BUF_RING);
|
|
return FALSE;
|
|
}
|
|
addBuffer(b, *s&0xff, char);
|
|
}
|
|
addBuffer(b, EOS, char);
|
|
|
|
text->text.t = baseBuffer(b, char);
|
|
text->storage = PL_CHARS_RING;
|
|
text->encoding = ENC_ISO_LATIN_1;
|
|
}
|
|
}
|
|
|
|
succeed;
|
|
}
|
|
|
|
|
|
static int
|
|
can_demote(PL_chars_t *text)
|
|
{ if ( text->encoding != ENC_ISO_LATIN_1 )
|
|
{ const pl_wchar_t *w = (const pl_wchar_t*)text->text.w;
|
|
const pl_wchar_t *e = &w[text->length];
|
|
|
|
for(; w<e; w++)
|
|
{ if ( *w > 0xff )
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
|
Convert text to 8-bit according to flags. May hold REP_UTF8 to convert
|
|
to UTF-8, REP_MB to convert to locale 8-bit representation or nothing to
|
|
convert to ISO Latin-1. This predicate can fail of the text cannot be
|
|
represented.
|
|
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
|
|
|
|
static int
|
|
wctobuffer(wchar_t c, mbstate_t *mbs, Buffer buf)
|
|
{ char b[PL_MB_LEN_MAX];
|
|
size_t n;
|
|
|
|
if ( (n=wcrtomb(b, c, mbs)) != (size_t)-1 )
|
|
{ size_t i;
|
|
|
|
for(i=0; i<n; i++)
|
|
addBuffer(buf, b[i], char);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE; /* cannot represent */
|
|
}
|
|
|
|
|
|
static void
|
|
utf8tobuffer(wchar_t c, Buffer buf)
|
|
{ if ( c <= 0x7f )
|
|
{ addBuffer(buf, (char)c, char);
|
|
} else
|
|
{ char b[6];
|
|
char *e = b;
|
|
const char *s;
|
|
|
|
e = utf8_put_char(e, c);
|
|
for(s=b; s<e; s++)
|
|
addBuffer(buf, *s, char);
|
|
}
|
|
}
|
|
|
|
|
|
int
|
|
PL_mb_text(PL_chars_t *text, int flags)
|
|
{ int norep = -1;
|
|
IOENC target = ((flags&REP_UTF8) ? ENC_UTF8 :
|
|
(flags&REP_MB) ? ENC_ANSI : ENC_ISO_LATIN_1);
|
|
|
|
if ( text->encoding != target )
|
|
{ Buffer b = findBuffer(BUF_RING);
|
|
|
|
switch(text->encoding)
|
|
{ case ENC_ISO_LATIN_1:
|
|
{ const unsigned char *s = (const unsigned char*)text->text.t;
|
|
const unsigned char *e = &s[text->length];
|
|
|
|
if ( target == ENC_UTF8 )
|
|
{ for( ; s<e; s++)
|
|
{ utf8tobuffer(*s, b);
|
|
}
|
|
addBuffer(b, 0, char);
|
|
} else /* if ( target == ENC_MB ) */
|
|
{ mbstate_t mbs;
|
|
|
|
memset(&mbs, 0, sizeof(mbs));
|
|
for( ; s<e; s++)
|
|
{ if ( !wctobuffer(*s, &mbs, b) )
|
|
{ unfindBuffer(BUF_RING);
|
|
norep = *s;
|
|
goto rep_error;
|
|
}
|
|
}
|
|
wctobuffer(0, &mbs, b);
|
|
}
|
|
|
|
break;
|
|
}
|
|
case ENC_UTF8:
|
|
{ const char *s = (const char*)text->text.t;
|
|
const char *e = &s[text->length];
|
|
|
|
if ( target == ENC_ISO_LATIN_1 )
|
|
{ for( ; s<e; )
|
|
{ int ch;
|
|
s = _PL__utf8_get_char(s, &ch);
|
|
if (ch > 0xff) {
|
|
unfindBuffer(BUF_RING);
|
|
norep = *s;
|
|
goto rep_error;
|
|
}
|
|
addBuffer(b, ch, char);
|
|
}
|
|
addBuffer(b, 0, char);
|
|
|
|
} else
|
|
{ mbstate_t mbs;
|
|
|
|
memset(&mbs, 0, sizeof(mbs));
|
|
for( ; s<e; )
|
|
{ int ch;
|
|
s = _PL__utf8_get_char(s, &ch);
|
|
if ( !wctobuffer(ch, &mbs, b) )
|
|
{ unfindBuffer(BUF_RING);
|
|
norep = ch;
|
|
goto rep_error;
|
|
}
|
|
}
|
|
wctobuffer(0, &mbs, b);
|
|
}
|
|
break;
|
|
}
|
|
case ENC_WCHAR:
|
|
{ if ( target == ENC_ISO_LATIN_1 )
|
|
{ return PL_demote_text(text);
|
|
} else
|
|
{ const pl_wchar_t *w = (const pl_wchar_t*)text->text.w;
|
|
const pl_wchar_t *e = &w[text->length];
|
|
|
|
if ( target == ENC_UTF8 )
|
|
{ for( ; w<e; w++)
|
|
{ utf8tobuffer(*w, b);
|
|
}
|
|
addBuffer(b, 0, char);
|
|
} else /* if ( target == ENC_MB ) */
|
|
{ mbstate_t mbs;
|
|
|
|
memset(&mbs, 0, sizeof(mbs));
|
|
for( ; w<e; w++)
|
|
{ if ( !wctobuffer(*w, &mbs, b) )
|
|
{ unfindBuffer(BUF_RING);
|
|
norep = *w;
|
|
goto rep_error;
|
|
}
|
|
}
|
|
wctobuffer(0, &mbs, b);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
{ assert(0);
|
|
fail;
|
|
}
|
|
}
|
|
|
|
text->length = sizeOfBuffer(b)-1;
|
|
text->text.t = baseBuffer(b, char);
|
|
text->encoding = target;
|
|
text->storage = PL_CHARS_RING;
|
|
}
|
|
|
|
succeed;
|
|
|
|
rep_error:
|
|
if ( (flags & CVT_EXCEPTION) )
|
|
{ char msg[128];
|
|
|
|
sprintf(msg,
|
|
"Cannot represent char U%04x using %s encoding",
|
|
norep,
|
|
target == ENC_ISO_LATIN_1 ? "ISO Latin-1" : "current locale");
|
|
|
|
return PL_error(NULL, 0, msg, ERR_REPRESENTATION, ATOM_encoding);
|
|
}
|
|
|
|
fail;
|
|
}
|
|
|
|
|
|
int
|
|
PL_canonise_text(PL_chars_t *text)
|
|
{ if ( !text->canonical )
|
|
{ switch(text->encoding )
|
|
{ case ENC_ISO_LATIN_1:
|
|
break; /* nothing to do */
|
|
case ENC_WCHAR:
|
|
{ const pl_wchar_t *w = (const pl_wchar_t*)text->text.w;
|
|
const pl_wchar_t *e = &w[text->length];
|
|
|
|
for(; w<e; w++)
|
|
{ if ( *w > 0xff )
|
|
return TRUE;
|
|
}
|
|
|
|
return PL_demote_text(text);
|
|
}
|
|
case ENC_UTF8:
|
|
{ const char *s = text->text.t;
|
|
const char *e = &s[text->length];
|
|
|
|
while(s<e && !(*s & 0x80))
|
|
s++;
|
|
if ( s == e )
|
|
{ text->encoding = ENC_ISO_LATIN_1;
|
|
text->canonical = TRUE;
|
|
} else
|
|
{ int chr;
|
|
int wide = FALSE;
|
|
size_t len = s - text->text.t;
|
|
|
|
while(s<e)
|
|
{ s = utf8_get_char(s, &chr);
|
|
if ( chr > 0xff ) /* requires wide characters */
|
|
wide = TRUE;
|
|
len++;
|
|
}
|
|
|
|
s = (const char *)text->text.t;
|
|
text->length = len;
|
|
|
|
if ( wide )
|
|
{ pl_wchar_t *to = PL_malloc(sizeof(pl_wchar_t)*(len+1));
|
|
|
|
text->text.w = to;
|
|
while(s<e)
|
|
{ s = utf8_get_char(s, &chr);
|
|
*to++ = chr;
|
|
}
|
|
*to = EOS;
|
|
|
|
text->encoding = ENC_WCHAR;
|
|
text->storage = PL_CHARS_MALLOC;
|
|
} else
|
|
{ char *to = PL_malloc(len+1);
|
|
|
|
text->text.t = to;
|
|
while(s<e)
|
|
{ s = utf8_get_char(s, &chr);
|
|
*to++ = chr;
|
|
}
|
|
*to = EOS;
|
|
|
|
text->encoding = ENC_ISO_LATIN_1;
|
|
text->storage = PL_CHARS_MALLOC;
|
|
}
|
|
|
|
text->canonical = TRUE;
|
|
}
|
|
|
|
succeed;
|
|
}
|
|
case ENC_ANSI:
|
|
{ mbstate_t mbs;
|
|
size_t len = 0;
|
|
int iso = TRUE;
|
|
char *s = text->text.t;
|
|
size_t rc, n = text->length;
|
|
wchar_t wc;
|
|
|
|
memset(&mbs, 0, sizeof(mbs));
|
|
while( n > 0 )
|
|
{ if ( (rc=mbrtowc(&wc, s, n, &mbs)) == (size_t)-1 || rc == 0)
|
|
return FALSE; /* encoding error */
|
|
|
|
if ( wc > 0xff )
|
|
iso = FALSE;
|
|
len++;
|
|
n -= rc;
|
|
s += rc;
|
|
}
|
|
|
|
if ( n == 0 )
|
|
{ const char *from = text->text.t;
|
|
void *do_free;
|
|
|
|
n = text->length;
|
|
memset(&mbs, 0, sizeof(mbs));
|
|
|
|
if ( text->storage == PL_CHARS_MALLOC )
|
|
do_free = text->text.t;
|
|
else
|
|
do_free = NULL;
|
|
|
|
if ( iso )
|
|
{ char *to;
|
|
|
|
text->encoding = ENC_ISO_LATIN_1;
|
|
if ( len+1 < sizeof(text->buf) )
|
|
{ text->text.t = text->buf;
|
|
text->storage = PL_CHARS_LOCAL;
|
|
} else
|
|
{ text->text.t = PL_malloc(len+1);
|
|
text->storage = PL_CHARS_MALLOC;
|
|
}
|
|
|
|
to = text->text.t;
|
|
while( n > 0 )
|
|
{ rc = mbrtowc(&wc, from, n, &mbs);
|
|
|
|
*to++ = (char)wc;
|
|
n -= rc;
|
|
from += rc;
|
|
}
|
|
*to = EOS;
|
|
} else
|
|
{ wchar_t *to;
|
|
char b2[sizeof(text->buf)];
|
|
|
|
text->encoding = ENC_WCHAR;
|
|
if ( len+1 < sizeof(text->buf)/sizeof(wchar_t) )
|
|
{ if ( text->text.t == text->buf )
|
|
{ memcpy(b2, text->buf, sizeof(text->buf));
|
|
from = b2;
|
|
}
|
|
text->text.w = (wchar_t*)text->buf;
|
|
} else
|
|
{ text->text.w = PL_malloc((len+1)*sizeof(wchar_t));
|
|
text->storage = PL_CHARS_MALLOC;
|
|
}
|
|
|
|
to = text->text.w;
|
|
while( n > 0 )
|
|
{ rc = mbrtowc(&wc, from, n, &mbs);
|
|
|
|
*to++ = wc;
|
|
n -= rc;
|
|
from += rc;
|
|
}
|
|
*to = EOS;
|
|
}
|
|
|
|
text->length = len;
|
|
text->canonical = TRUE;
|
|
if ( do_free )
|
|
PL_free(do_free);
|
|
|
|
succeed;
|
|
}
|
|
|
|
fail;
|
|
}
|
|
default:
|
|
assert(0);
|
|
}
|
|
}
|
|
|
|
succeed;
|
|
}
|
|
|
|
|
|
void
|
|
PL_free_text(PL_chars_t *text)
|
|
{ if ( text->storage == PL_CHARS_MALLOC )
|
|
PL_free(text->text.t);
|
|
}
|
|
|
|
|
|
void
|
|
PL_text_recode(PL_chars_t *text, IOENC encoding)
|
|
{ if ( text->encoding != encoding )
|
|
{ switch(encoding)
|
|
{ case ENC_UTF8:
|
|
{ switch(text->encoding)
|
|
{ case ENC_ASCII:
|
|
text->encoding = ENC_UTF8;
|
|
break;
|
|
case ENC_ISO_LATIN_1:
|
|
{ Buffer b = findBuffer(BUF_RING);
|
|
const unsigned char *s = (const unsigned char *)text->text.t;
|
|
const unsigned char *e = &s[text->length];
|
|
char tmp[8];
|
|
|
|
for( ; s<e; s++)
|
|
{ if ( *s&0x80 )
|
|
{ const char *end = utf8_put_char(tmp, *s);
|
|
const char *q = tmp;
|
|
|
|
for(q=tmp; q<end; q++)
|
|
addBuffer(b, *q, char);
|
|
} else
|
|
{ addBuffer(b, *s, char);
|
|
}
|
|
}
|
|
PL_free_text(text);
|
|
text->length = entriesBuffer(b, char);
|
|
addBuffer(b, EOS, char);
|
|
text->text.t = baseBuffer(b, char);
|
|
text->encoding = ENC_UTF8;
|
|
text->storage = PL_CHARS_RING;
|
|
|
|
break;
|
|
}
|
|
case ENC_WCHAR:
|
|
{ Buffer b = findBuffer(BUF_RING);
|
|
const pl_wchar_t *s = text->text.w;
|
|
const pl_wchar_t *e = &s[text->length];
|
|
char tmp[8];
|
|
|
|
for( ; s<e; s++)
|
|
{ if ( *s > 0x7f )
|
|
{ const char *end = utf8_put_char(tmp, (int)*s);
|
|
const char *q = tmp;
|
|
|
|
for(q=tmp; q<end; q++)
|
|
addBuffer(b, *q&0xff, char);
|
|
} else
|
|
{ addBuffer(b, *s&0xff, char);
|
|
}
|
|
}
|
|
PL_free_text(text);
|
|
text->length = entriesBuffer(b, char);
|
|
addBuffer(b, EOS, char);
|
|
text->text.t = baseBuffer(b, char);
|
|
text->encoding = ENC_UTF8;
|
|
text->storage = PL_CHARS_RING;
|
|
|
|
break;
|
|
}
|
|
default:
|
|
assert(0);
|
|
}
|
|
break;
|
|
default:
|
|
assert(0);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
|
PL_cmp_text(PL_chars_t *t1, size_t o1,
|
|
PL_chars_t *t2, size_t o2,
|
|
size_t len)
|
|
|
|
Compares two substrings of two text representations.
|
|
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
|
|
|
|
int
|
|
PL_cmp_text(PL_chars_t *t1, size_t o1, PL_chars_t *t2, size_t o2,
|
|
size_t len)
|
|
{ ssize_t l = len;
|
|
int ifeq = 0;
|
|
|
|
if ( l > (ssize_t)(t1->length - o1) )
|
|
{ l = t1->length - o1;
|
|
ifeq = CMP_LESS; /* first is short */
|
|
}
|
|
if ( l > (ssize_t)(t2->length - o2) )
|
|
{ l = t2->length - o2;
|
|
if ( ifeq == 0 )
|
|
ifeq = CMP_GREATER;
|
|
}
|
|
|
|
if ( l == 0 ) /* too long offsets */
|
|
return ifeq;
|
|
|
|
if ( t1->encoding == ENC_ISO_LATIN_1 && t2->encoding == ENC_ISO_LATIN_1 )
|
|
{ const unsigned char *s = (const unsigned char *)t1->text.t+o1;
|
|
const unsigned char *q = (const unsigned char *)t2->text.t+o2;
|
|
|
|
for(; l-- > 0 && *s == *q; s++, q++ )
|
|
;
|
|
if ( l < 0 )
|
|
return ifeq;
|
|
else
|
|
return *s > *q ? CMP_GREATER : CMP_LESS;
|
|
} else if ( t1->encoding == ENC_WCHAR && t2->encoding == ENC_WCHAR )
|
|
{ const pl_wchar_t *s = t1->text.w+o1;
|
|
const pl_wchar_t *q = t2->text.w+o2;
|
|
|
|
for(; l-- > 0 && *s == *q; s++, q++ )
|
|
;
|
|
if ( l < 0 )
|
|
return ifeq;
|
|
else
|
|
return *s > *q ? CMP_GREATER : CMP_LESS;
|
|
} else if ( t1->encoding == ENC_ISO_LATIN_1 && t2->encoding == ENC_WCHAR )
|
|
{ const unsigned char *s = (const unsigned char *)t1->text.t+o1;
|
|
const pl_wchar_t *q = t2->text.w+o2;
|
|
|
|
for(; l-- > 0 && *s == *q; s++, q++ )
|
|
;
|
|
if ( l < 0 )
|
|
return ifeq;
|
|
else
|
|
return *s > *q ? CMP_GREATER : CMP_LESS;
|
|
} else
|
|
{ const pl_wchar_t *s = t1->text.w+o1;
|
|
const unsigned char *q = (const unsigned char *)t2->text.t+o2;
|
|
|
|
for(; l-- > 0 && *s == *q; s++, q++ )
|
|
;
|
|
if ( l < 0 )
|
|
return ifeq;
|
|
else
|
|
return *s > *q ? CMP_GREATER : CMP_LESS;
|
|
}
|
|
}
|
|
|
|
|
|
int
|
|
PL_concat_text(int n, PL_chars_t **text, PL_chars_t *result)
|
|
{ size_t total_length = 0;
|
|
int latin = TRUE;
|
|
int i;
|
|
|
|
for(i=0; i<n; i++)
|
|
{ if ( latin && !can_demote(text[i]) )
|
|
latin = FALSE;
|
|
total_length += text[i]->length;
|
|
}
|
|
|
|
result->canonical = TRUE;
|
|
result->length = total_length;
|
|
|
|
if ( latin )
|
|
{ char *to;
|
|
|
|
result->encoding = ENC_ISO_LATIN_1;
|
|
if ( total_length+1 < sizeof(result->buf) )
|
|
{ result->text.t = result->buf;
|
|
result->storage = PL_CHARS_LOCAL;
|
|
} else
|
|
{ result->text.t = PL_malloc(total_length+1);
|
|
result->storage = PL_CHARS_MALLOC;
|
|
}
|
|
|
|
for(to=result->text.t, i=0; i<n; i++)
|
|
{ memcpy(to, text[i]->text.t, text[i]->length);
|
|
to += text[i]->length;
|
|
}
|
|
*to = EOS;
|
|
} else
|
|
{ pl_wchar_t *to;
|
|
|
|
result->encoding = ENC_WCHAR;
|
|
if ( total_length+1 < sizeof(result->buf)/sizeof(pl_wchar_t) )
|
|
{ result->text.w = (pl_wchar_t*)result->buf;
|
|
result->storage = PL_CHARS_LOCAL;
|
|
} else
|
|
{ result->text.w = PL_malloc((total_length+1)*sizeof(pl_wchar_t));
|
|
result->storage = PL_CHARS_MALLOC;
|
|
}
|
|
|
|
for(to=result->text.w, i=0; i<n; i++)
|
|
{ if ( text[i]->encoding == ENC_WCHAR )
|
|
{ memcpy(to, text[i]->text.w, text[i]->length*sizeof(pl_wchar_t));
|
|
to += text[i]->length;
|
|
} else
|
|
{ const unsigned char *f = (const unsigned char *)text[i]->text.t;
|
|
const unsigned char *e = &f[text[i]->length];
|
|
|
|
while(f<e)
|
|
*to++ = *f++;
|
|
}
|
|
}
|
|
assert((size_t)(to-result->text.w) == total_length);
|
|
*to = EOS;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
IOSTREAM *
|
|
Sopen_text(PL_chars_t *txt, const char *mode)
|
|
{ IOSTREAM *stream;
|
|
|
|
if ( !streq(mode, "r") )
|
|
{ errno = EINVAL;
|
|
return NULL;
|
|
}
|
|
|
|
stream = Sopen_string(NULL,
|
|
txt->text.t,
|
|
bufsize_text(txt, txt->length),
|
|
mode);
|
|
stream->encoding = txt->encoding;
|
|
|
|
return stream;
|
|
}
|