748 lines
13 KiB
C
748 lines
13 KiB
C
/* $Id$
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Part of SWI-Prolog
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Author: Jan Wielemaker
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define _ISOC99_SOURCE 1 /* fwprintf(), etc prototypes */
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#define UTIL_H_IMPLEMENTATION
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#include "util.h"
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#include <unistd.h>
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#include <ctype.h>
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#include <wctype.h>
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#include <stdlib.h>
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#ifdef HAVE_MALLOC_H
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#include <malloc.h>
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_IO_H
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#include <io.h>
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#endif
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <assert.h>
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#include "utf8.h"
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size_t
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istrlen(const ichar *s)
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{ size_t len =0;
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while(*s++)
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len++;
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return len;
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}
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ichar *
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istrdup(const ichar *s)
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{ if ( s )
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{ ichar *dup = sgml_malloc((istrlen(s)+1)*sizeof(ichar));
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ichar *d = dup;
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while(*s)
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*d++ = *s++;
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*d = 0;
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return dup;
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} else
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{ return NULL;
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}
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}
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ichar *
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istrndup(const ichar *s, int len)
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{ ichar *dup = sgml_malloc((len+1)*sizeof(ichar));
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ichar *d = dup;
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while(--len >= 0)
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*d++ = *s++;
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*d = 0;
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return dup;
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}
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ichar *
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istrcpy(ichar *d, const ichar *s)
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{ ichar *r = d;
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while(*s)
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*d++ = *s++;
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*d = 0;
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return r;
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}
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ichar *
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istrcat(ichar *d, const ichar *s)
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{ ichar *r = d;
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d += istrlen(d);
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istrcpy(d, s);
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return r;
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}
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ichar *
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istrncpy(ichar *d, const ichar *s, size_t len)
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{ ichar *r = d;
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while(*s && len-- > 0)
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*d++ = *s++;
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return r;
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}
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int
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istrcaseeq(const ichar *s1, const ichar *s2)
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{ ichar c;
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while ((c = *s1++) != '\0')
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{ if (towlower(*s2++) != towlower(c))
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return FALSE;
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}
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return *s2 == '\0';
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}
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int
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istreq(const ichar *s1, const ichar *s2)
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{ while(*s1 && *s1 == *s2)
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s1++, s2++;
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if ( *s1 == 0 && *s2 == 0 )
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return TRUE;
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return FALSE;
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}
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int
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istrncaseeq(const ichar *s1, const ichar *s2, int len)
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{ while(--len >= 0 && towlower(*s1) == towlower(*s2))
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s1++, s2++;
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if ( len < 0 )
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return TRUE;
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return FALSE;
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}
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int
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istrprefix(const ichar *pref, const ichar *s)
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{ while(*pref && *pref == *s)
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pref++, s++;
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if ( *pref == 0 )
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return TRUE;
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return FALSE;
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}
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ichar *
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istrchr(const ichar *s, int c)
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{ for( ; *s; s++ )
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{ if ( c == *s )
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return (ichar *)s;
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}
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return NULL;
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}
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ichar *
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istrupper(ichar *s)
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{ ichar *r = s;
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for( ; *s; s++)
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*s = toupper(*s);
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return r;
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}
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ichar *
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istrlower(ichar *s)
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{ ichar *r = s;
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for( ; *s; s++)
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*s = towlower(*s);
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return r;
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}
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int
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istrhash(const ichar *t, int tsize)
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{ unsigned int value = 0;
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unsigned int shift = 5;
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while(*t)
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{ unsigned int c = *t++;
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c -= 'a';
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value ^= c << (shift & 0xf);
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shift ^= c;
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}
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value = value ^ (value >> 16);
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return value % tsize;
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}
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int
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istrcasehash(const ichar *t, int tsize)
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{ unsigned int value = 0;
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unsigned int shift = 5;
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while(*t)
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{ unsigned int c = towlower(*t++); /* case insensitive */
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c -= 'a';
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value ^= c << (shift & 0xf);
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shift ^= c;
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}
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value = value ^ (value >> 16);
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return value % tsize;
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}
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int
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istrtol(const ichar *s, long *val)
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{ long v;
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ichar *e;
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if ( *s )
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{ v = wcstol(s, &e, 10);
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if ( !e[0] && errno != ERANGE )
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{ *val = v;
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return TRUE;
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}
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}
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return FALSE;
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}
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/*******************************
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* INPUT CHARACTER BUFFER *
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*******************************/
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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Input character buffer is used to collect data between SGML markup, such
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as <...>
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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icharbuf *
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new_icharbuf()
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{ icharbuf *buf = sgml_malloc(sizeof(*buf));
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buf->allocated = 0;
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buf->size = 0;
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buf->data = NULL;
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return buf;
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}
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void
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free_icharbuf(icharbuf *buf)
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{ if ( buf->data )
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sgml_free(buf->data);
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sgml_free(buf);
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}
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void
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__add_icharbuf(icharbuf *buf, int chr)
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{ if ( buf->size == buf->allocated )
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{ buf->allocated = (buf->allocated ? buf->allocated*2 : 128);
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if ( buf->data )
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buf->data = sgml_realloc(buf->data, buf->allocated*sizeof(ichar));
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else
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buf->data = sgml_malloc(buf->allocated*sizeof(ichar));
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}
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buf->data[buf->size++] = chr;
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}
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void
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del_icharbuf(icharbuf *buf)
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{ if ( buf->size > 0 )
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buf->size--;
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}
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void
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terminate_icharbuf(icharbuf *buf)
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{ add_icharbuf(buf, '\0');
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buf->size--;
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}
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void
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empty_icharbuf(icharbuf *buf)
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{ buf->size = 0;
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}
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/*******************************
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* OUTPUT CHARACTER BUFFER *
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*******************************/
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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Output character buffer deals with two representations: ISO Latin-1 and
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UCS. It starts life as ISO Latin-1 and is upgraded to UCS as the first
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character that doesn't fit ISO Latin-1 is added to the buffer.
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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ocharbuf *
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init_ocharbuf(ocharbuf *buf)
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{ buf->size = 0;
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buf->allocated = sizeof(buf->localbuf)/sizeof(wchar_t);
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buf->data.w = buf->localbuf;
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return buf;
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}
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ocharbuf *
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new_ocharbuf()
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{ ocharbuf *buf = sgml_malloc(sizeof(*buf));
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return init_ocharbuf(buf);
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}
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void
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free_ocharbuf(ocharbuf *buf)
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{ if ( buf->data.w && buf->data.w != buf->localbuf )
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sgml_free(buf->data.w);
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sgml_free(buf);
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}
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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Make sure the data of the buffer is malloc'ed and nul-terminated.
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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ocharbuf *
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malloc_ocharbuf(ocharbuf *buf)
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{ if ( buf->data.w == buf->localbuf )
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{ int bytes = (buf->size+1) * sizeof(wchar_t);
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buf->data.w = sgml_malloc(bytes);
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memcpy(buf->data.w, buf->localbuf, bytes);
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buf->data.w[buf->size] = 0;
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} else
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terminate_ocharbuf(buf);
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return buf;
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}
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void
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add_ocharbuf(ocharbuf *buf, int chr)
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{ if ( buf->size == buf->allocated )
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{ buf->allocated *= 2;
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if ( buf->data.w != (wchar_t*)buf->localbuf )
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{ buf->data.w = sgml_realloc(buf->data.w, buf->allocated*sizeof(wchar_t));
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} else
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{ buf->data.w = sgml_malloc(buf->allocated*sizeof(wchar_t));
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memcpy(buf->data.w, buf->localbuf, sizeof(buf->localbuf));
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}
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}
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buf->data.w[buf->size++] = chr;
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}
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void
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del_ocharbuf(ocharbuf *buf)
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{ if ( buf->size > 0 )
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buf->size--;
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}
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void
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terminate_ocharbuf(ocharbuf *buf)
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{ add_ocharbuf(buf, '\0');
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buf->size--;
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}
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/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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empty_ocharbuf() frees the associated buffer after a big lump has been
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in it. Otherwise it simply sets the size to 0.
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- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
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void
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empty_ocharbuf(ocharbuf *buf)
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{ buf->size = 0;
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if ( buf->allocated > 8192 )
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{ assert(buf->data.w != buf->localbuf);
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sgml_free(buf->data.w);
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buf->allocated = sizeof(buf->localbuf)/sizeof(wchar_t);
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buf->data.w = buf->localbuf;
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}
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}
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/*******************************
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* BUFFER RING *
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*******************************/
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#define RINGSIZE 16
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static void *ring[RINGSIZE];
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static int ringp;
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wchar_t *
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str2ring(const wchar_t *in)
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{ wchar_t *copy = sgml_malloc((wcslen(in)+1)*sizeof(wchar_t));
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if ( !copy )
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{ sgml_nomem();
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return NULL;
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}
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wcscpy(copy, in);
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if ( ring[ringp] )
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sgml_free(ring[ringp]);
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ring[ringp++] = copy;
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if ( ringp == RINGSIZE )
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ringp = 0;
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return copy;
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}
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void *
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ringallo(size_t size)
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{ char *result = sgml_malloc(size);
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if ( ring[ringp] )
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sgml_free(ring[ringp]);
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ring[ringp++] = result;
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if ( ringp == RINGSIZE )
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ringp = 0;
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return result;
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}
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/*******************************
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* MISC *
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*******************************/
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wchar_t const *
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str_summary(wchar_t const *s, int len)
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{ wchar_t *buf;
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size_t l = wcslen(s);
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if ( l < (size_t)len )
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return s;
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buf = ringallo((len + 10)*sizeof(wchar_t));
|
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wcsncpy(buf, s, len-5);
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wcscpy(&buf[len-5], L" ... ");
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wcscpy(&buf[len], &s[l-5]);
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return buf;
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}
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wchar_t *
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utf8towcs(const char *in)
|
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{ size_t sl = strlen(in);
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size_t len = utf8_strlen(in, sl);
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wchar_t *buf = sgml_malloc((len + 1)*sizeof(wchar_t));
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const char *e = in+sl;
|
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int i;
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for(i=0; in < e;)
|
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{ int chr;
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|
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in = utf8_get_char(in, &chr);
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buf[i++] = chr;
|
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}
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|
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buf[i] = 0;
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return buf;
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}
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|
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char *
|
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wcstoutf8(const wchar_t *in)
|
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{ size_t size = 0;
|
|
const wchar_t *s;
|
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char *rc, *o;
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|
|
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for(s=in; *s; s++)
|
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{ char buf[6];
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|
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if ( *s >= 0x80 )
|
|
{ char *o2 = utf8_put_char(buf, *s);
|
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size += o2-buf;
|
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} else
|
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{ size++;
|
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}
|
|
}
|
|
|
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rc = sgml_malloc(size+1);
|
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for(o=rc, s=in; *s; s++)
|
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{ o = utf8_put_char(o, *s);
|
|
}
|
|
*o = '\0';
|
|
|
|
return rc;
|
|
}
|
|
|
|
|
|
/*******************************
|
|
* FILES *
|
|
*******************************/
|
|
|
|
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
|
|
Load a file into memory. This would be so easy if we didn't had to deal
|
|
with &#RE/&#RS handling that forces us to create the proper record start
|
|
and end.
|
|
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
|
|
|
|
#ifndef O_BINARY
|
|
#define O_BINARY 0
|
|
#endif
|
|
|
|
FILE *
|
|
wfopen(const wchar_t *name, const char *mode)
|
|
{ size_t mbl = wcstombs(NULL, name, 0);
|
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|
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if ( mbl > 0 )
|
|
{ char *mbs = sgml_malloc(mbl+1);
|
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FILE *f;
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|
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wcstombs(mbs, name, mbl+1);
|
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f = fopen(mbs, mode);
|
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sgml_free(mbs);
|
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|
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return f;
|
|
}
|
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|
|
return NULL;
|
|
}
|
|
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|
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static int
|
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wopen(const wchar_t *name, int flags)
|
|
{ size_t mbl = wcstombs(NULL, name, 0);
|
|
|
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if ( mbl > 0 )
|
|
{ char *mbs = sgml_malloc(mbl+1);
|
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int fd;
|
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|
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wcstombs(mbs, name, mbl+1);
|
|
fd = open(mbs, flags);
|
|
sgml_free(mbs);
|
|
|
|
return fd;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
ichar *
|
|
load_sgml_file_to_charp(const ichar *file, int normalise_rsre, size_t *length)
|
|
{ int fd;
|
|
|
|
if ( (fd = wopen(file, O_RDONLY|O_BINARY)) >= 0 )
|
|
{ struct stat buf;
|
|
|
|
if ( fstat(fd, &buf) == 0 )
|
|
{ size_t len = buf.st_size;
|
|
char *r = sgml_malloc(len+1);
|
|
|
|
if ( r )
|
|
{ char *s = r;
|
|
|
|
while(len>0)
|
|
{ int n;
|
|
|
|
if ( (n=(int)read(fd, s, (unsigned int)len)) < 0 )
|
|
{ close(fd); /* I/O error */
|
|
sgml_free(r);
|
|
return NULL;
|
|
} else if ( n == 0 )
|
|
break;
|
|
len -= n;
|
|
s += n;
|
|
}
|
|
|
|
len = s-r;
|
|
*s = '\0'; /* ensure closing EOS */
|
|
close(fd);
|
|
|
|
{ int nl;
|
|
int last_is_lf;
|
|
ichar *r2, *t;
|
|
|
|
if ( normalise_rsre )
|
|
{ last_is_lf = (len > 0 && s[-1] == '\n');
|
|
for(s=r, nl=0; *s; s++)
|
|
{ if ( *s == '\n' && s>r && s[-1] != '\r' )
|
|
nl++;
|
|
}
|
|
} else
|
|
{ nl = 0;
|
|
last_is_lf = 0;
|
|
}
|
|
|
|
r2 = sgml_malloc((len+nl+1)*sizeof(ichar));
|
|
for(s=r, t=r2; *s; s++)
|
|
{ if ( *s == '\n' )
|
|
{ if ( s>r && s[-1] != '\r' )
|
|
*t++ = CR;
|
|
*t++ = LF;
|
|
} else
|
|
*t++ = *s;
|
|
}
|
|
len = t-r2;
|
|
*t = '\0';
|
|
|
|
if ( last_is_lf )
|
|
r2[--len] = '\0'; /* delete last LF */
|
|
|
|
if ( length )
|
|
*length = len;
|
|
sgml_free(r);
|
|
return r2;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/*******************************
|
|
* ALLOCATION *
|
|
*******************************/
|
|
|
|
#ifdef _WINDOWS
|
|
#include <windows.h>
|
|
#endif
|
|
|
|
void
|
|
sgml_nomem()
|
|
{ fprintf(stderr, "SGML: Fatal: out of memory\n");
|
|
|
|
#ifdef _WINDOWS
|
|
MessageBox(NULL, "SGML: Fatal: out of memory", "SGML", MB_OK|MB_TASKMODAL);
|
|
#endif
|
|
|
|
exit(1);
|
|
}
|
|
|
|
|
|
void *
|
|
sgml_malloc(size_t size)
|
|
{ void *mem;
|
|
|
|
if ( size == 0 )
|
|
return NULL;
|
|
|
|
if ( (mem = malloc(size)) )
|
|
return mem;
|
|
|
|
sgml_nomem();
|
|
return NULL;
|
|
}
|
|
|
|
|
|
void *
|
|
sgml_realloc(void *old, size_t size)
|
|
{ void *mem;
|
|
|
|
if ( old )
|
|
{ if ( (mem = realloc(old, size)) )
|
|
return mem;
|
|
} else
|
|
{ if ( (mem = malloc(size)) )
|
|
return mem;
|
|
}
|
|
|
|
sgml_nomem();
|
|
return NULL;
|
|
}
|
|
|
|
|
|
void *
|
|
sgml_calloc(size_t n, size_t size)
|
|
{ void *mem;
|
|
|
|
if ( (mem=calloc(n, size)) )
|
|
return mem;
|
|
|
|
sgml_nomem();
|
|
return NULL;
|
|
}
|
|
|
|
|
|
void
|
|
sgml_free(void *mem)
|
|
{ if ( mem )
|
|
free(mem);
|
|
}
|
|
|
|
|
|
/*******************************
|
|
* DEBUG *
|
|
*******************************/
|
|
|
|
void
|
|
wputs(ichar *s)
|
|
{ fwprintf(stderr, L"%ls", s);
|
|
}
|