6f2a3f43a5
* NEW: gb.Text has been deprecated, and a warning is printed each time it is used now. Use gb.IgnoreCase instead. * NEW: Natural string comparison and sorting were implemented. Use the gb.Natural constant for that. git-svn-id: svn://localhost/gambas/trunk@2640 867c0c6c-44f3-4631-809d-bfa615b0a4ec
403 lines
8.6 KiB
C
403 lines
8.6 KiB
C
/***************************************************************************
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gbx_c_string.c
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(c) 2000-2009 Benoît Minisini <gambas@users.sourceforge.net>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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***************************************************************************/
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#define __GBX_C_STRING_C
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#include "gbx_info.h"
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#ifndef GBX_INFO
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#include "gb_common.h"
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#include <wctype.h>
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#include <wchar.h>
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#include <iconv.h>
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#include "gb_error.h"
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#include "gb_table.h"
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#include "gbx_string.h"
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#include "gbx_api.h"
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#include "gbx_exec.h"
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#include "gbx_compare.h"
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#include "gambas.h"
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#include "gbx_c_string.h"
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static const char *_str;
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static int _len;
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static int _pos;
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static int _clen;
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static const char _char_length[256] =
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{
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
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2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
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3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,5,5,5,5,6,6,1,1
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};
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int STRING_get_utf8_char_length(unsigned char c)
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{
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return _char_length[c];
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}
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static void init_conv(const char *str, int len)
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{
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_str = str;
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_len = len;
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_pos = 0;
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_clen = -1;
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}
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static int get_next_pos(void)
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{
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if (_pos >= _len)
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return 0;
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//_pos += get_char_length(&_str[_pos]);
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_pos += _char_length[(unsigned char)_str[_pos]];
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return _pos;
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}
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static int get_pos(int index)
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{
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int i;
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for (i = 1; i < index; i++)
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get_next_pos();
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return _pos;
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}
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static int get_length(void)
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{
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int len;
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int i;
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if (_clen >= 0)
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return _clen;
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len = 0;
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for (i = 0; i < _len; i++)
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{
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if ((_str[i] & 0xC0) != 0x80)
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len++;
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}
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_clen = len;
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return len;
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}
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static int byte_to_index(const char *str, int len, int byte)
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{
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if (byte < 1)
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return 0;
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if (byte > len)
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byte = len;
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init_conv(str, byte);
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return get_length();
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}
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static int index_to_byte(const char *str, int len, int index)
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{
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if (index <= 0)
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return 0;
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init_conv(str, len);
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return get_pos(index) + 1;
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}
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BEGIN_METHOD(string_pos, GB_STRING str; GB_INTEGER index)
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GB_ReturnInteger(index_to_byte(STRING(str), LENGTH(str), VARG(index)));
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END_METHOD
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BEGIN_METHOD(string_len, GB_STRING str)
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init_conv(STRING(str), LENGTH(str));
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GB_ReturnInteger(get_length());
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END_METHOD
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BEGIN_METHOD(string_index, GB_STRING str; GB_INTEGER pos)
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GB_ReturnInteger(byte_to_index(STRING(str), LENGTH(str), VARG(pos)));
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END_METHOD
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static void get_substring(int start, int len)
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{
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int i;
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int pos;
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if (len < 0)
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len += get_length();
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if (len <= 0)
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{
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GB_ReturnNull();
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return;
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}
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for (i = 0; i < start; i++)
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{
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if (get_next_pos() <= 0)
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{
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GB_ReturnNull();
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return;
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}
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}
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pos = _pos;
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for (i = 0; i < len; i++)
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{
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if (get_next_pos() <= 0)
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break;
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}
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GB_ReturnNewString(_str + pos, _pos - pos);
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}
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BEGIN_METHOD(string_mid, GB_STRING str; GB_INTEGER start; GB_INTEGER len)
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int start = VARG(start);
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int len = VARGOPT(len, LENGTH(str));
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if (start < 1)
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{
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GB_Error((char *)E_ARG);
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return;
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}
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init_conv(STRING(str), LENGTH(str));
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get_substring(start - 1, len);
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END_METHOD
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BEGIN_METHOD(string_left, GB_STRING str; GB_INTEGER len)
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int len = VARGOPT(len, 1);
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init_conv(STRING(str), LENGTH(str));
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get_substring(0, len);
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END_METHOD
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BEGIN_METHOD(string_right, GB_STRING str; GB_INTEGER len)
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int len = VARGOPT(len, 1);
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init_conv(STRING(str), LENGTH(str));
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if (len < 0)
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get_substring((-len), LENGTH(str));
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else
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get_substring(get_length() - len, len);
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END_METHOD
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static void convert_string(char *str, int len, bool upper)
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{
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char *temp = NULL;
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int i, l;
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wchar_t *wtemp;
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if (len > 0)
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{
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if (STRING_conv(&temp, str, len, "UTF-8", SC_UNICODE, FALSE))
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goto __ERROR;
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wtemp = (wchar_t *)temp;
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l = wcslen(wtemp);
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if (upper)
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{
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for (i = 0; i < l; i++)
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wtemp[i] = towupper(wtemp[i]);
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}
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else
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{
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for (i = 0; i < l; i++)
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wtemp[i] = towlower(wtemp[i]);
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}
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if (STRING_conv(&temp, temp, l * sizeof(wchar_t), SC_UNICODE, "UTF-8", FALSE))
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goto __ERROR;
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}
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GB_ReturnString(temp);
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return;
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__ERROR:
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GB_ReturnNewString(str, len);
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}
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BEGIN_METHOD(string_lower, GB_STRING str)
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convert_string(STRING(str), LENGTH(str), FALSE);
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END_METHOD
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BEGIN_METHOD(string_upper, GB_STRING str)
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convert_string(STRING(str), LENGTH(str), TRUE);
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END_METHOD
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BEGIN_METHOD(string_chr, GB_INTEGER code)
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const char *charset = EXEC_big_endian ? "UCS-4BE" : "UCS-4LE";
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char *temp;
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STRING_conv(&temp, (char *)(&VARG(code)), sizeof(wchar_t), charset, "UTF-8", TRUE);
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GB_ReturnString(temp);
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END_METHOD
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BEGIN_METHOD(string_code, GB_STRING str; GB_INTEGER index)
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int index, pos, npos;
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const char *charset = EXEC_big_endian ? "UCS-4BE" : "UCS-4LE";
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char *temp;
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index = VARGOPT(index, 1);
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if (index < 1)
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{
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GB_ReturnInteger(0);
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return;
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}
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//{
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// GB_Error((char *)E_ARG);
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// return;
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//}
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init_conv(STRING(str), LENGTH(str));
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pos = get_pos(index);
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npos = get_next_pos();
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if (npos == 0)
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{
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GB_ReturnInteger(0);
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return;
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}
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STRING_conv(&temp, STRING(str) + pos, npos - pos, "UTF-8", charset, TRUE);
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GB_ReturnInteger(*((int *)temp));
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END_METHOD
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static void string_search(const char *str, int len, const char *pattern, int lenp, int start, bool right)
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{
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int pos;
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if (start)
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start = index_to_byte(str, len, start);
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pos = STRING_search(str, len, pattern, lenp, start, right, FALSE);
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GB_ReturnInteger(byte_to_index(str, len, pos));
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}
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BEGIN_METHOD(string_instr, GB_STRING str; GB_STRING pattern; GB_INTEGER start)
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string_search(STRING(str), LENGTH(str), STRING(pattern), LENGTH(pattern), VARGOPT(start, 0), FALSE);
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END_METHOD
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BEGIN_METHOD(string_rinstr, GB_STRING str; GB_STRING pattern; GB_INTEGER start)
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string_search(STRING(str), LENGTH(str), STRING(pattern), LENGTH(pattern), VARGOPT(start, 0), TRUE);
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END_METHOD
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BEGIN_METHOD(string_comp, GB_STRING str1; GB_STRING str2; GB_INTEGER mode)
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bool mode = VARGOPT(mode, GB_COMP_BINARY) != GB_COMP_BINARY;
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GB_ReturnInteger(COMPARE_string_lang(STRING(str1), LENGTH(str1), STRING(str2), LENGTH(str2), mode, TRUE));
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END_METHOD
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#endif
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GB_DESC NATIVE_String[] =
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{
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GB_DECLARE("String", 0), GB_VIRTUAL_CLASS(),
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GB_STATIC_METHOD("Len", "i", string_len, "(String)s"),
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GB_STATIC_METHOD("Mid", "s", string_mid, "(String)s(Start)i[(Length)i]"),
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GB_STATIC_METHOD("Mid$", "s", string_mid, "(String)s(Start)i[(Length)i]"),
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GB_STATIC_METHOD("Left", "s", string_left, "(String)s[(Length)i]"),
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GB_STATIC_METHOD("Left$", "s", string_left, "(String)s[(Length)i]"),
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GB_STATIC_METHOD("Right", "s", string_right, "(String)s[(Length)i]"),
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GB_STATIC_METHOD("Right$", "s", string_right, "(String)s[(Length)i]"),
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GB_STATIC_METHOD("Upper", "s", string_upper, "(String)s"),
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GB_STATIC_METHOD("Upper$", "s", string_upper, "(String)s"),
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GB_STATIC_METHOD("UCase", "s", string_upper, "(String)s"),
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GB_STATIC_METHOD("UCase$", "s", string_upper, "(String)s"),
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GB_STATIC_METHOD("Lower", "s", string_lower, "(String)s"),
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GB_STATIC_METHOD("Lower$", "s", string_lower, "(String)s"),
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GB_STATIC_METHOD("LCase", "s", string_lower, "(String)s"),
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GB_STATIC_METHOD("LCase$", "s", string_lower, "(String)s"),
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GB_STATIC_METHOD("InStr", "i", string_instr, "(String)s(Pattern)s[(From)i]"),
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GB_STATIC_METHOD("RInStr", "i", string_rinstr, "(String)s(Pattern)s[(From)i]"),
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GB_STATIC_METHOD("Comp", "i", string_comp, "(String)s(String2)s[(Mode)i]"),
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GB_STATIC_METHOD("Byte", "i", string_pos, "(String)s(Index)i"),
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GB_STATIC_METHOD("Pos", "i", string_pos, "(String)s(Index)i"),
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GB_STATIC_METHOD("Index", "i", string_index, "(String)s(Byte)i"),
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GB_STATIC_METHOD("Chr", "s", string_chr, "(Unicode)i"),
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GB_STATIC_METHOD("Chr$", "s", string_chr, "(Unicode)i"),
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GB_STATIC_METHOD("Code", "i", string_code, "(String)s[(Index)i]"),
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GB_END_DECLARE
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};
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