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407 lines
10 KiB
407 lines
10 KiB
/* Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
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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; version 2 of the License.
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#include <my_global.h>
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#include <m_ctype.h>
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#include <my_xml.h>
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#ifndef SCO
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#include <m_string.h>
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#endif
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/*
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This files implements routines which parse XML based
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character set and collation description files.
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Unicode collations are encoded according to
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Unicode Technical Standard #35
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Locale Data Markup Language (LDML)
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http://www.unicode.org/reports/tr35/
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and converted into ICU string according to
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Collation Customization
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http://oss.software.ibm.com/icu/userguide/Collate_Customization.html
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*/
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static char *mstr(char *str,const char *src,size_t l1,size_t l2)
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{
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l1= l1<l2 ? l1 : l2;
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memcpy(str,src,l1);
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str[l1]='\0';
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return str;
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}
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struct my_cs_file_section_st
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{
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int state;
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const char *str;
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};
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#define _CS_MISC 1
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#define _CS_ID 2
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#define _CS_CSNAME 3
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#define _CS_FAMILY 4
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#define _CS_ORDER 5
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#define _CS_COLNAME 6
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#define _CS_FLAG 7
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#define _CS_CHARSET 8
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#define _CS_COLLATION 9
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#define _CS_UPPERMAP 10
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#define _CS_LOWERMAP 11
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#define _CS_UNIMAP 12
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#define _CS_COLLMAP 13
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#define _CS_CTYPEMAP 14
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#define _CS_PRIMARY_ID 15
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#define _CS_BINARY_ID 16
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#define _CS_CSDESCRIPT 17
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#define _CS_RESET 18
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#define _CS_DIFF1 19
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#define _CS_DIFF2 20
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#define _CS_DIFF3 21
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static struct my_cs_file_section_st sec[] =
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{
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{_CS_MISC, "xml"},
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{_CS_MISC, "xml/version"},
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{_CS_MISC, "xml/encoding"},
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{_CS_MISC, "charsets"},
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{_CS_MISC, "charsets/max-id"},
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{_CS_CHARSET, "charsets/charset"},
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{_CS_PRIMARY_ID, "charsets/charset/primary-id"},
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{_CS_BINARY_ID, "charsets/charset/binary-id"},
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{_CS_CSNAME, "charsets/charset/name"},
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{_CS_FAMILY, "charsets/charset/family"},
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{_CS_CSDESCRIPT, "charsets/charset/description"},
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{_CS_MISC, "charsets/charset/alias"},
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{_CS_MISC, "charsets/charset/ctype"},
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{_CS_CTYPEMAP, "charsets/charset/ctype/map"},
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{_CS_MISC, "charsets/charset/upper"},
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{_CS_UPPERMAP, "charsets/charset/upper/map"},
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{_CS_MISC, "charsets/charset/lower"},
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{_CS_LOWERMAP, "charsets/charset/lower/map"},
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{_CS_MISC, "charsets/charset/unicode"},
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{_CS_UNIMAP, "charsets/charset/unicode/map"},
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{_CS_COLLATION, "charsets/charset/collation"},
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{_CS_COLNAME, "charsets/charset/collation/name"},
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{_CS_ID, "charsets/charset/collation/id"},
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{_CS_ORDER, "charsets/charset/collation/order"},
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{_CS_FLAG, "charsets/charset/collation/flag"},
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{_CS_COLLMAP, "charsets/charset/collation/map"},
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{_CS_RESET, "charsets/charset/collation/rules/reset"},
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{_CS_DIFF1, "charsets/charset/collation/rules/p"},
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{_CS_DIFF2, "charsets/charset/collation/rules/s"},
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{_CS_DIFF3, "charsets/charset/collation/rules/t"},
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{0, NULL}
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};
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static struct my_cs_file_section_st * cs_file_sec(const char *attr, size_t len)
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{
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struct my_cs_file_section_st *s;
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for (s=sec; s->str; s++)
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{
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if (!strncmp(attr,s->str,len))
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return s;
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}
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return NULL;
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}
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#define MY_CS_CSDESCR_SIZE 64
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#define MY_CS_TAILORING_SIZE 1024
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typedef struct my_cs_file_info
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{
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char csname[MY_CS_NAME_SIZE];
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char name[MY_CS_NAME_SIZE];
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uchar ctype[MY_CS_CTYPE_TABLE_SIZE];
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uchar to_lower[MY_CS_TO_LOWER_TABLE_SIZE];
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uchar to_upper[MY_CS_TO_UPPER_TABLE_SIZE];
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uchar sort_order[MY_CS_SORT_ORDER_TABLE_SIZE];
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uint16 tab_to_uni[MY_CS_TO_UNI_TABLE_SIZE];
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char comment[MY_CS_CSDESCR_SIZE];
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char tailoring[MY_CS_TAILORING_SIZE];
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size_t tailoring_length;
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CHARSET_INFO cs;
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int (*add_collation)(CHARSET_INFO *cs);
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} MY_CHARSET_LOADER;
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static int fill_uchar(uchar *a,uint size,const char *str, size_t len)
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{
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uint i= 0;
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const char *s, *b, *e=str+len;
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for (s=str ; s < e ; i++)
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{
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for ( ; (s < e) && strchr(" \t\r\n",s[0]); s++) ;
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b=s;
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for ( ; (s < e) && !strchr(" \t\r\n",s[0]); s++) ;
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if (s == b || i > size)
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break;
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a[i]= (uchar) strtoul(b,NULL,16);
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}
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return 0;
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}
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static int fill_uint16(uint16 *a,uint size,const char *str, size_t len)
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{
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uint i= 0;
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const char *s, *b, *e=str+len;
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for (s=str ; s < e ; i++)
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{
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for ( ; (s < e) && strchr(" \t\r\n",s[0]); s++) ;
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b=s;
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for ( ; (s < e) && !strchr(" \t\r\n",s[0]); s++) ;
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if (s == b || i > size)
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break;
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a[i]= (uint16) strtol(b,NULL,16);
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}
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return 0;
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}
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static int cs_enter(MY_XML_PARSER *st,const char *attr, size_t len)
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{
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struct my_cs_file_info *i= (struct my_cs_file_info *)st->user_data;
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struct my_cs_file_section_st *s= cs_file_sec(attr,len);
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if ( s && (s->state == _CS_CHARSET))
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bzero(&i->cs,sizeof(i->cs));
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if (s && (s->state == _CS_COLLATION))
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i->tailoring_length= 0;
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return MY_XML_OK;
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}
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static int cs_leave(MY_XML_PARSER *st,const char *attr, size_t len)
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{
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struct my_cs_file_info *i= (struct my_cs_file_info *)st->user_data;
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struct my_cs_file_section_st *s= cs_file_sec(attr,len);
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int state= s ? s->state : 0;
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int rc;
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switch(state){
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case _CS_COLLATION:
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rc= i->add_collation ? i->add_collation(&i->cs) : MY_XML_OK;
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break;
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default:
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rc=MY_XML_OK;
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}
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return rc;
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}
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static int cs_value(MY_XML_PARSER *st,const char *attr, size_t len)
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{
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struct my_cs_file_info *i= (struct my_cs_file_info *)st->user_data;
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struct my_cs_file_section_st *s;
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int state= (int)((s=cs_file_sec(st->attr, strlen(st->attr))) ? s->state :
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0);
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switch (state) {
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case _CS_ID:
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i->cs.number= strtol(attr,(char**)NULL,10);
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break;
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case _CS_BINARY_ID:
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i->cs.binary_number= strtol(attr,(char**)NULL,10);
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break;
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case _CS_PRIMARY_ID:
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i->cs.primary_number= strtol(attr,(char**)NULL,10);
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break;
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case _CS_COLNAME:
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i->cs.name=mstr(i->name,attr,len,MY_CS_NAME_SIZE-1);
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break;
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case _CS_CSNAME:
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i->cs.csname=mstr(i->csname,attr,len,MY_CS_NAME_SIZE-1);
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break;
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case _CS_CSDESCRIPT:
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i->cs.comment=mstr(i->comment,attr,len,MY_CS_CSDESCR_SIZE-1);
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break;
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case _CS_FLAG:
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if (!strncmp("primary",attr,len))
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i->cs.state|= MY_CS_PRIMARY;
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else if (!strncmp("binary",attr,len))
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i->cs.state|= MY_CS_BINSORT;
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else if (!strncmp("compiled",attr,len))
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i->cs.state|= MY_CS_COMPILED;
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break;
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case _CS_UPPERMAP:
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fill_uchar(i->to_upper,MY_CS_TO_UPPER_TABLE_SIZE,attr,len);
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i->cs.to_upper=i->to_upper;
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break;
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case _CS_LOWERMAP:
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fill_uchar(i->to_lower,MY_CS_TO_LOWER_TABLE_SIZE,attr,len);
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i->cs.to_lower=i->to_lower;
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break;
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case _CS_UNIMAP:
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fill_uint16(i->tab_to_uni,MY_CS_TO_UNI_TABLE_SIZE,attr,len);
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i->cs.tab_to_uni=i->tab_to_uni;
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break;
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case _CS_COLLMAP:
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fill_uchar(i->sort_order,MY_CS_SORT_ORDER_TABLE_SIZE,attr,len);
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i->cs.sort_order=i->sort_order;
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break;
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case _CS_CTYPEMAP:
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fill_uchar(i->ctype,MY_CS_CTYPE_TABLE_SIZE,attr,len);
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i->cs.ctype=i->ctype;
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break;
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case _CS_RESET:
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case _CS_DIFF1:
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case _CS_DIFF2:
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case _CS_DIFF3:
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{
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/*
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Convert collation description from
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Locale Data Markup Language (LDML)
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into ICU Collation Customization expression.
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*/
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char arg[16];
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const char *cmd[]= {"&","<","<<","<<<"};
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i->cs.tailoring= i->tailoring;
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mstr(arg,attr,len,sizeof(arg)-1);
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if (i->tailoring_length + 20 < sizeof(i->tailoring))
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{
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char *dst= i->tailoring_length + i->tailoring;
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i->tailoring_length+= sprintf(dst," %s %s",cmd[state-_CS_RESET],arg);
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}
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}
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}
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return MY_XML_OK;
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}
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my_bool my_parse_charset_xml(const char *buf, size_t len,
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int (*add_collation)(CHARSET_INFO *cs))
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{
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MY_XML_PARSER p;
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struct my_cs_file_info i;
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my_bool rc;
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my_xml_parser_create(&p);
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my_xml_set_enter_handler(&p,cs_enter);
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my_xml_set_value_handler(&p,cs_value);
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my_xml_set_leave_handler(&p,cs_leave);
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i.add_collation= add_collation;
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my_xml_set_user_data(&p,(void*)&i);
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rc= (my_xml_parse(&p,buf,len) == MY_XML_OK) ? FALSE : TRUE;
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my_xml_parser_free(&p);
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return rc;
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}
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/*
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Check repertoire: detect pure ascii strings
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*/
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uint
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my_string_repertoire(CHARSET_INFO *cs, const char *str, ulong length)
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{
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const char *strend= str + length;
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if (cs->mbminlen == 1)
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{
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for ( ; str < strend; str++)
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{
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if (((uchar) *str) > 0x7F)
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return MY_REPERTOIRE_UNICODE30;
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}
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}
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else
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{
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my_wc_t wc;
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int chlen;
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for (;
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(chlen= cs->cset->mb_wc(cs, &wc, (uchar*) str, (uchar*) strend)) > 0;
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str+= chlen)
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{
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if (wc > 0x7F)
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return MY_REPERTOIRE_UNICODE30;
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}
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}
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return MY_REPERTOIRE_ASCII;
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}
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/*
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Returns repertoire for charset
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*/
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uint my_charset_repertoire(CHARSET_INFO *cs)
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{
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return cs->state & MY_CS_PUREASCII ?
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MY_REPERTOIRE_ASCII : MY_REPERTOIRE_UNICODE30;
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}
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/*
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Detect whether a character set is ASCII compatible.
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Returns TRUE for:
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- all 8bit character sets whose Unicode mapping of 0x7B is '{'
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(ignores swe7 which maps 0x7B to "LATIN LETTER A WITH DIAERESIS")
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- all multi-byte character sets having mbminlen == 1
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(ignores ucs2 whose mbminlen is 2)
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TODO:
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When merging to 5.2, this function should be changed
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to check a new flag MY_CS_NONASCII,
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return (cs->flag & MY_CS_NONASCII) ? 0 : 1;
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This flag was previously added into 5.2 under terms
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of WL#3759 "Optimize identifier conversion in client-server protocol"
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especially to mark character sets not compatible with ASCII.
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We won't backport this flag to 5.0 or 5.1.
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This function is Ok for 5.0 and 5.1, because we're not going
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to introduce new tricky character sets between 5.0 and 5.2.
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*/
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my_bool
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my_charset_is_ascii_based(CHARSET_INFO *cs)
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{
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return
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(cs->mbmaxlen == 1 && cs->tab_to_uni && cs->tab_to_uni['{'] == '{') ||
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(cs->mbminlen == 1 && cs->mbmaxlen > 1);
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}
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/*
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Detect if a character set is 8bit,
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and it is pure ascii, i.e. doesn't have
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characters outside U+0000..U+007F
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This functions is shared between "conf_to_src"
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and dynamic charsets loader in "mysqld".
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*/
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my_bool
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my_charset_is_8bit_pure_ascii(CHARSET_INFO *cs)
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{
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size_t code;
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if (!cs->tab_to_uni)
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return 0;
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for (code= 0; code < 256; code++)
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{
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if (cs->tab_to_uni[code] > 0x7F)
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return 0;
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}
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return 1;
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}
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