348f1cefbd
* BUG: Fix a useless and incorrect string initialization in the UTF-8 to UTF-16 internal conversion routine. * BUG: Native functions that return a string must not use the GB.ReturnNull() API, but GB.ReturnVoidString() instead. Fix the String.LCase() and String.UCase() functions accordingly. * BUG: Date() function takes one argument, or at least three arguments now. git-svn-id: svn://localhost/gambas/trunk@4213 867c0c6c-44f3-4631-809d-bfa615b0a4ec
729 lines
15 KiB
C
729 lines
15 KiB
C
/***************************************************************************
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gbx_c_string.c
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(c) 2000-2011 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., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, 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 "gb_common_case.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_subr.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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#define UNICODE_INVALID 0xFFFFFFFFU
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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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/***************************************************************************/
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#define utf8_get_char_length(_c) ((int)_char_length[(unsigned char)(_c)])
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int STRING_get_utf8_char_length(unsigned char c)
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{
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return utf8_get_char_length(c);
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}
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static int utf8_get_length(const char *str, int len)
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{
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int ulen;
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int i;
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ulen = 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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ulen++;
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}
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return ulen;
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}
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static uint utf8_to_unicode(const char *str, int len)
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{
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uint unicode;
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switch (len)
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{
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case 2:
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unicode = (str[1] & 0x3F) + ((str[0] & 0x1F) << 6);
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if (unicode < 0x80)
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goto _INVALID;
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break;
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case 3:
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unicode = (str[2] & 0x3F) + ((str[1] & 0x3F) << 6) + ((str[0] & 0xF) << 12);
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if (unicode < 0x800)
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goto _INVALID;
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break;
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case 4:
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unicode = (str[3] & 0x3F) + ((str[2] & 0x3F) << 6) + ((str[1] & 0x3F) << 12) + ((str[0] & 0x7) << 18);
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if (unicode < 0x10000)
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goto _INVALID;
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break;
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case 5:
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unicode = (str[4] & 0x3F) + ((str[3] & 0x3F) << 6) + ((str[2] & 0x3F) << 12) + ((str[1] & 0x3F) << 18) + ((str[0] & 0x3) << 24);
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if (unicode < 0x200000)
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goto _INVALID;
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break;
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case 6:
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unicode = (str[5] & 0x3F) + ((str[4] & 0x3F) << 6) + ((str[3] & 0x3F) << 12) + ((str[2] & 0x3F) << 18) + ((str[1] & 0x3F) << 24) + ((str[0] & 0x1) << 30);
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if (unicode < 0x4000000)
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goto _INVALID;
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break;
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default:
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unicode = str[0];
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break;
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}
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return unicode;
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_INVALID:
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return UNICODE_INVALID;
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}
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static void utf8_from_unicode(uint code, char *str)
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{
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if (code < 0x80)
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str[0] = code;
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else if (code < 0x800)
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{
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str[0] = (code >> 6) | 0xC0;
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str[1] = (code & 0x3F) | 0x80;
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}
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else if (code < 0x10000)
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{
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str[0] = (code >> 12) | 0xE0;
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str[1] = ((code >> 6) & 0x3F) | 0x80;
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str[2] = (code & 0x3F) | 0x80;
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}
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else if (code < 0x200000)
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{
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str[0] = (code >> 18) | 0xF0;
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str[1] = ((code >> 12) & 0x3F) | 0x80;
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str[2] = ((code >> 6) & 0x3F) | 0x80;
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str[3] = (code & 0x3F) | 0x80;
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}
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else if (code < 0x4000000)
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{
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str[0] = (code >> 24) | 0xF8;
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str[1] = ((code >> 18) & 0x3F) | 0x80;
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str[2] = ((code >> 12) & 0x3F) | 0x80;
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str[3] = ((code >> 6) & 0x3F) | 0x80;
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str[4] = (code & 0x3F) | 0x80;
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}
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else if (code < 0x80000000)
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{
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str[0] = (code >> 31) | 0xFC;
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str[1] = ((code >> 24) & 0x3F)| 0x80;
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str[2] = ((code >> 18) & 0x3F) | 0x80;
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str[3] = ((code >> 12) & 0x3F) | 0x80;
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str[4] = ((code >> 6) & 0x3F) | 0x80;
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str[5] = (code & 0x3F) | 0x80;
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}
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else
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str[0] = 0;
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}
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/***************************************************************************/
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char *STRING_utf8_current = NULL;
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#define UTF8_POS_COUNT 256
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static short _utf8_pos[UTF8_POS_COUNT];
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static int _utf8_last_pos;
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static int utf8_get_pos(const char *str, int len, int index)
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{
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int i, pos;
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if (index <= 0)
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return 0;
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if (str != STRING_utf8_current)
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{
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STRING_utf8_current = (char *)str;
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_utf8_last_pos = 0;
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_utf8_pos[0] = 0;
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}
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if (index > len)
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index = len;
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if (index <= _utf8_last_pos)
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return _utf8_pos[index];
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pos = _utf8_pos[_utf8_last_pos];
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while (_utf8_last_pos < (UTF8_POS_COUNT - 1))
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{
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pos += utf8_get_char_length(str[pos]);
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_utf8_pos[++_utf8_last_pos] = pos;
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if (index == _utf8_last_pos)
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return pos;
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}
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for (i = UTF8_POS_COUNT - 1; i < index; i++)
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pos += utf8_get_char_length(str[pos]);
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return pos;
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}
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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 <= 0)
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return 0;
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if (byte > len)
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byte = len;
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return utf8_get_length(str, byte);
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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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return utf8_get_pos(str, len, index - 1) + 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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GB_ReturnInteger(utf8_get_length(STRING(str), LENGTH(str)));
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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 String_Mid(ushort code)
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{
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char *str;
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int start, length;
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int len, ulen;
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bool null;
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SUBR_ENTER();
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null = SUBR_check_string(PARAM);
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VALUE_conv_integer(&PARAM[1]);
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start = PARAM[1]._integer.value - 1;
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if (start < 0)
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THROW(E_ARG);
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if (null)
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goto _SUBR_MID_FIN;
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str = PARAM->_string.addr + PARAM->_string.start;
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len = PARAM->_string.len;
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ulen = utf8_get_pos(str, len, start);
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if (ulen >= len)
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{
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VOID_STRING(PARAM);
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goto _SUBR_MID_FIN;
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}
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PARAM->_string.start += ulen;
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//str += ulen;
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//len -= ulen;
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if (NPARAM == 2)
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{
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ulen = len - ulen;
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}
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else
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{
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VALUE_conv_integer(&PARAM[2]);
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length = PARAM[2]._integer.value;
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if (length < 0)
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length += utf8_get_length(str, len) - start;
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if (length == 1)
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ulen = utf8_get_char_length(str[ulen]);
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else
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ulen = utf8_get_pos(str, len, start + length) - ulen;
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}
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if (ulen <= 0)
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{
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VOID_STRING(PARAM);
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}
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else
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PARAM->_string.len = ulen;
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_SUBR_MID_FIN:
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SP -= NPARAM;
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SP++;
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}
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static void String_Left(ushort code)
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{
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int val;
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char *str;
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int len, ulen;
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SUBR_ENTER();
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if (!SUBR_check_string(PARAM))
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{
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if (NPARAM == 1)
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val = 1;
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else
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{
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VALUE_conv_integer(&PARAM[1]);
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val = PARAM[1]._integer.value;
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}
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str = PARAM->_string.addr + PARAM->_string.start;
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len = PARAM->_string.len;
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if (val < 0)
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val += utf8_get_length(str, len);
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ulen = utf8_get_pos(str, len, val);
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PARAM->_string.len = ulen;
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}
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SP -= NPARAM;
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SP++;
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}
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static void String_Right(ushort code)
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{
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int val;
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char *str;
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int len, ulen;
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SUBR_ENTER();
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if (!SUBR_check_string(PARAM))
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{
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if (NPARAM == 1)
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val = 1;
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else
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{
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VALUE_conv_integer(&PARAM[1]);
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val = PARAM[1]._integer.value;
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}
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str = PARAM->_string.addr + PARAM->_string.start;
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len = PARAM->_string.len;
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if (val < 0)
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val = (-val);
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else
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val = utf8_get_length(str, len) - val;
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ulen = utf8_get_pos(str, len, val);
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PARAM->_string.start += ulen;
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PARAM->_string.len -= ulen;
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}
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SP -= NPARAM;
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SP++;
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}
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bool STRING_convert_to_unicode(wchar_t **pwstr, int *pwlen, const char *str, int len)
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{
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char *result;
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int wlen = utf8_get_length(str, len);
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int i, lc;
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wchar_t *wstr;
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result = STRING_new_temp(NULL, wlen * sizeof(wchar_t) + 3);
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wstr = (wchar_t *)result;
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for (i = 0; i < wlen; i++)
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{
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lc = utf8_get_char_length(*str);
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wstr[i] = (wchar_t)utf8_to_unicode(str, lc);
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if (wstr[i] == UNICODE_INVALID)
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return TRUE;
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str += lc;
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}
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wstr[wlen] = 0;
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*pwstr = wstr;
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*pwlen = wlen;
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return FALSE;
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}
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static bool convert_to_unicode(wchar_t **wstr, int *wlen, const char *str, int len, bool upper)
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{
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wchar_t *wtemp;
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int i, l;
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if (len == 0)
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{
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*wstr = NULL;
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*wlen = 0;
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return FALSE;
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}
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if (STRING_convert_to_unicode(&wtemp, &l, str, len))
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return TRUE;
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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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*wstr = wtemp;
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*wlen = l;
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return FALSE;
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}
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static void convert_string(char *str, int len, bool upper)
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{
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char *result;
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char *p, *pe;
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char c;
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int lc;
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wchar_t wc;
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if (len <= 0)
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{
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GB_ReturnVoidString();
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return;
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}
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result = STRING_new_temp(str, len);
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p = result;
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pe = &result[len];
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if (upper)
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{
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while (p < pe)
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{
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c = *p;
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lc = utf8_get_char_length(c);
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if (lc == 1)
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{
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*p = toupper(c);
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p++;
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}
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else
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{
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wc = (wchar_t)utf8_to_unicode(p, lc);
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wc = towupper(wc);
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// We suppose that the conversion does not change the number of bytes!
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utf8_from_unicode((uint)wc, p);
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//if (utf8_get_char_length(*p) != lc)
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// fprintf(stderr, "convert_string: not the same number of bytes!\n");
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p += lc;
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}
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}
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}
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else
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{
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while (p < pe)
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{
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c = *p;
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lc = utf8_get_char_length(c);
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if (lc == 1)
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{
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*p = tolower(c);
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p++;
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}
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else
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{
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wc = (wchar_t)utf8_to_unicode(p, lc);
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wc = towlower(wc);
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// We suppose that the conversion does not change the number of bytes!
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utf8_from_unicode((uint)wc, p);
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//if (utf8_get_char_length(*p) != lc)
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// fprintf(stderr, "convert_string: not the same number of bytes!\n");
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p += lc;
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}
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}
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}
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GB_ReturnString(result);
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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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|
|
|
char temp[8];
|
|
|
|
utf8_from_unicode(VARG(code), temp);
|
|
temp[utf8_get_char_length(temp[0])] = 0;
|
|
GB_ReturnNewZeroString(temp);
|
|
|
|
END_METHOD
|
|
|
|
|
|
BEGIN_METHOD(String_Code, GB_STRING str; GB_INTEGER index)
|
|
|
|
char *str;
|
|
int len, index, pos, lc;
|
|
|
|
index = VARGOPT(index, 1);
|
|
if (index < 1)
|
|
{
|
|
GB_ReturnInteger(0);
|
|
return;
|
|
}
|
|
|
|
str = STRING(str);
|
|
len = LENGTH(str);
|
|
pos = utf8_get_pos(str, len, index - 1);
|
|
lc = utf8_get_char_length(str[pos]);
|
|
|
|
GB_ReturnInteger(utf8_to_unicode(&str[pos], lc));
|
|
|
|
END_METHOD
|
|
|
|
static void string_search(const char *str, int len, const char *pattern, int lenp, int start, bool right, bool nocase)
|
|
{
|
|
int pos;
|
|
|
|
if (start)
|
|
start = index_to_byte(str, len, start);
|
|
|
|
if (!nocase)
|
|
{
|
|
pos = STRING_search(str, len, pattern, lenp, start, right, FALSE);
|
|
pos = byte_to_index(str, len, pos);
|
|
}
|
|
else
|
|
{
|
|
wchar_t *wstr;
|
|
int lstr;
|
|
wchar_t *wpattern;
|
|
int lpattern;
|
|
|
|
if (convert_to_unicode(&wstr, &lstr, str, len, TRUE))
|
|
goto __ERROR;
|
|
|
|
if (convert_to_unicode(&wpattern, &lpattern, pattern, lenp, TRUE))
|
|
goto __ERROR;
|
|
|
|
pos = STRING_search((char *)wstr, lstr * sizeof(wchar_t), (char *)wpattern, lpattern * sizeof(wchar_t), start * sizeof(wchar_t), right, FALSE);
|
|
if (pos)
|
|
pos = (pos - 1) / sizeof(wchar_t) + 1;
|
|
}
|
|
|
|
GB_ReturnInteger(pos);
|
|
return;
|
|
|
|
__ERROR:
|
|
|
|
GB_ReturnInteger(0);
|
|
return;
|
|
}
|
|
|
|
BEGIN_METHOD(String_Instr, GB_STRING str; GB_STRING pattern; GB_INTEGER start; GB_INTEGER mode)
|
|
|
|
string_search(STRING(str), LENGTH(str), STRING(pattern), LENGTH(pattern), VARGOPT(start, 0), FALSE, VARGOPT(mode, GB_COMP_BINARY) == GB_COMP_NOCASE);
|
|
|
|
END_METHOD
|
|
|
|
BEGIN_METHOD(String_RInstr, GB_STRING str; GB_STRING pattern; GB_INTEGER start; GB_INTEGER mode)
|
|
|
|
string_search(STRING(str), LENGTH(str), STRING(pattern), LENGTH(pattern), VARGOPT(start, 0), TRUE, VARGOPT(mode, GB_COMP_BINARY) == GB_COMP_NOCASE);
|
|
|
|
END_METHOD
|
|
|
|
BEGIN_METHOD(String_Comp, GB_STRING str1; GB_STRING str2; GB_INTEGER mode)
|
|
|
|
int mode = VARGOPT(mode, GB_COMP_BINARY) | GB_COMP_LANG;
|
|
bool nocase = (mode & GB_COMP_NOCASE) != 0;
|
|
|
|
if (mode & GB_COMP_NATURAL)
|
|
GB_ReturnInteger(COMPARE_string_natural(STRING(str1), LENGTH(str1), STRING(str2), LENGTH(str2), nocase));
|
|
else
|
|
GB_ReturnInteger(COMPARE_string_lang(STRING(str1), LENGTH(str1), STRING(str2), LENGTH(str2), nocase, TRUE));
|
|
|
|
END_METHOD
|
|
|
|
#define IS_VALID(_char) \
|
|
((_char) < 0x110000 && \
|
|
(((_char) & 0xFFFFF800) != 0xD800) && \
|
|
((_char) < 0xFDD0 || (_char) > 0xFDEF) && \
|
|
((_char) & 0xFFFE) != 0xFFFE)
|
|
|
|
BEGIN_METHOD(String_IsValid, GB_STRING str)
|
|
|
|
const uchar *str;
|
|
int len, lc;
|
|
uint unicode;
|
|
bool valid = FALSE;
|
|
int i;
|
|
|
|
str = (const uchar *)STRING(str);
|
|
len = LENGTH(str);
|
|
|
|
while (len)
|
|
{
|
|
lc = utf8_get_char_length(*str);
|
|
len -= lc;
|
|
if (len < 0)
|
|
goto _INVALID;
|
|
|
|
//for (i = 0; i < len; i++)
|
|
// fprintf(stderr, "%02X ", str[i]);
|
|
|
|
for (i = 1; i < lc; i++)
|
|
{
|
|
if ((str[i] & 0xC0) != 0x80)
|
|
goto _INVALID;
|
|
}
|
|
|
|
unicode = utf8_to_unicode((char *)str, lc);
|
|
if (unicode == UNICODE_INVALID)
|
|
goto _INVALID;
|
|
if (!IS_VALID(unicode))
|
|
goto _INVALID;
|
|
|
|
str += lc;
|
|
}
|
|
|
|
valid = TRUE;
|
|
|
|
_INVALID:
|
|
|
|
GB_ReturnBoolean(valid);
|
|
//fprintf(stderr, "\n");
|
|
|
|
END_METHOD
|
|
|
|
#endif
|
|
|
|
GB_DESC NATIVE_String[] =
|
|
{
|
|
GB_DECLARE("String", 0), GB_VIRTUAL_CLASS(),
|
|
|
|
GB_STATIC_METHOD("Len", "i", String_Len, "(String)s"),
|
|
|
|
GB_STATIC_FAST_METHOD("Mid", "s", String_Mid, "(String)s(Start)i[(Length)i]"),
|
|
GB_STATIC_FAST_METHOD("Mid$", "s", String_Mid, "(String)s(Start)i[(Length)i]"),
|
|
GB_STATIC_FAST_METHOD("Left", "s", String_Left, "(String)s[(Length)i]"),
|
|
GB_STATIC_FAST_METHOD("Left$", "s", String_Left, "(String)s[(Length)i]"),
|
|
GB_STATIC_FAST_METHOD("Right", "s", String_Right, "(String)s[(Length)i]"),
|
|
GB_STATIC_FAST_METHOD("Right$", "s", String_Right, "(String)s[(Length)i]"),
|
|
|
|
GB_STATIC_METHOD("Upper", "s", String_Upper, "(String)s"),
|
|
GB_STATIC_METHOD("Upper$", "s", String_Upper, "(String)s"),
|
|
GB_STATIC_METHOD("UCase", "s", String_Upper, "(String)s"),
|
|
GB_STATIC_METHOD("UCase$", "s", String_Upper, "(String)s"),
|
|
GB_STATIC_METHOD("Lower", "s", String_Lower, "(String)s"),
|
|
GB_STATIC_METHOD("Lower$", "s", String_Lower, "(String)s"),
|
|
GB_STATIC_METHOD("LCase", "s", String_Lower, "(String)s"),
|
|
GB_STATIC_METHOD("LCase$", "s", String_Lower, "(String)s"),
|
|
|
|
GB_STATIC_METHOD("InStr", "i", String_Instr, "(String)s(Pattern)s[(From)i(Mode)i]"),
|
|
GB_STATIC_METHOD("RInStr", "i", String_RInstr, "(String)s(Pattern)s[(From)i(Mode)i]"),
|
|
|
|
GB_STATIC_METHOD("Comp", "i", String_Comp, "(String)s(String2)s[(Mode)i]"),
|
|
|
|
GB_STATIC_METHOD("Byte", "i", String_Pos, "(String)s(Index)i"),
|
|
GB_STATIC_METHOD("Pos", "i", String_Pos, "(String)s(Index)i"),
|
|
GB_STATIC_METHOD("Index", "i", String_Index, "(String)s(Byte)i"),
|
|
|
|
GB_STATIC_METHOD("Chr", "s", String_Chr, "(Unicode)i"),
|
|
GB_STATIC_METHOD("Chr$", "s", String_Chr, "(Unicode)i"),
|
|
GB_STATIC_METHOD("Code", "i", String_Code, "(String)s[(Index)i]"),
|
|
|
|
GB_STATIC_METHOD("IsValid", "b", String_IsValid, "(String)s"),
|
|
|
|
GB_END_DECLARE
|
|
};
|