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MGMDB/MySQL/ctype.c
GRMrGecko 5d14fcdcae MGMDB Start
2011-10-02 20:48:43 -05:00

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/* Copyright (C) 2000 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include <my_global.h>
#include <m_ctype.h>
#include <my_xml.h>
#ifndef SCO
#include <m_string.h>
#endif
/*
This files implements routines which parse XML based
character set and collation description files.
Unicode collations are encoded according to
Unicode Technical Standard #35
Locale Data Markup Language (LDML)
http://www.unicode.org/reports/tr35/
and converted into ICU string according to
Collation Customization
http://oss.software.ibm.com/icu/userguide/Collate_Customization.html
*/
static char *mstr(char *str,const char *src,size_t l1,size_t l2)
{
l1= l1<l2 ? l1 : l2;
memcpy(str,src,l1);
str[l1]='\0';
return str;
}
struct my_cs_file_section_st
{
int state;
const char *str;
};
#define _CS_MISC 1
#define _CS_ID 2
#define _CS_CSNAME 3
#define _CS_FAMILY 4
#define _CS_ORDER 5
#define _CS_COLNAME 6
#define _CS_FLAG 7
#define _CS_CHARSET 8
#define _CS_COLLATION 9
#define _CS_UPPERMAP 10
#define _CS_LOWERMAP 11
#define _CS_UNIMAP 12
#define _CS_COLLMAP 13
#define _CS_CTYPEMAP 14
#define _CS_PRIMARY_ID 15
#define _CS_BINARY_ID 16
#define _CS_CSDESCRIPT 17
#define _CS_RESET 18
#define _CS_DIFF1 19
#define _CS_DIFF2 20
#define _CS_DIFF3 21
static struct my_cs_file_section_st sec[] =
{
{_CS_MISC, "xml"},
{_CS_MISC, "xml/version"},
{_CS_MISC, "xml/encoding"},
{_CS_MISC, "charsets"},
{_CS_MISC, "charsets/max-id"},
{_CS_CHARSET, "charsets/charset"},
{_CS_PRIMARY_ID, "charsets/charset/primary-id"},
{_CS_BINARY_ID, "charsets/charset/binary-id"},
{_CS_CSNAME, "charsets/charset/name"},
{_CS_FAMILY, "charsets/charset/family"},
{_CS_CSDESCRIPT, "charsets/charset/description"},
{_CS_MISC, "charsets/charset/alias"},
{_CS_MISC, "charsets/charset/ctype"},
{_CS_CTYPEMAP, "charsets/charset/ctype/map"},
{_CS_MISC, "charsets/charset/upper"},
{_CS_UPPERMAP, "charsets/charset/upper/map"},
{_CS_MISC, "charsets/charset/lower"},
{_CS_LOWERMAP, "charsets/charset/lower/map"},
{_CS_MISC, "charsets/charset/unicode"},
{_CS_UNIMAP, "charsets/charset/unicode/map"},
{_CS_COLLATION, "charsets/charset/collation"},
{_CS_COLNAME, "charsets/charset/collation/name"},
{_CS_ID, "charsets/charset/collation/id"},
{_CS_ORDER, "charsets/charset/collation/order"},
{_CS_FLAG, "charsets/charset/collation/flag"},
{_CS_COLLMAP, "charsets/charset/collation/map"},
{_CS_RESET, "charsets/charset/collation/rules/reset"},
{_CS_DIFF1, "charsets/charset/collation/rules/p"},
{_CS_DIFF2, "charsets/charset/collation/rules/s"},
{_CS_DIFF3, "charsets/charset/collation/rules/t"},
{0, NULL}
};
static struct my_cs_file_section_st * cs_file_sec(const char *attr, size_t len)
{
struct my_cs_file_section_st *s;
for (s=sec; s->str; s++)
{
if (!strncmp(attr,s->str,len))
return s;
}
return NULL;
}
#define MY_CS_CSDESCR_SIZE 64
#define MY_CS_TAILORING_SIZE 1024
typedef struct my_cs_file_info
{
char csname[MY_CS_NAME_SIZE];
char name[MY_CS_NAME_SIZE];
uchar ctype[MY_CS_CTYPE_TABLE_SIZE];
uchar to_lower[MY_CS_TO_LOWER_TABLE_SIZE];
uchar to_upper[MY_CS_TO_UPPER_TABLE_SIZE];
uchar sort_order[MY_CS_SORT_ORDER_TABLE_SIZE];
uint16 tab_to_uni[MY_CS_TO_UNI_TABLE_SIZE];
char comment[MY_CS_CSDESCR_SIZE];
char tailoring[MY_CS_TAILORING_SIZE];
size_t tailoring_length;
CHARSET_INFO cs;
int (*add_collation)(CHARSET_INFO *cs);
} MY_CHARSET_LOADER;
static int fill_uchar(uchar *a,uint size,const char *str, size_t len)
{
uint i= 0;
const char *s, *b, *e=str+len;
for (s=str ; s < e ; i++)
{
for ( ; (s < e) && strchr(" \t\r\n",s[0]); s++) ;
b=s;
for ( ; (s < e) && !strchr(" \t\r\n",s[0]); s++) ;
if (s == b || i > size)
break;
a[i]= (uchar) strtoul(b,NULL,16);
}
return 0;
}
static int fill_uint16(uint16 *a,uint size,const char *str, size_t len)
{
uint i= 0;
const char *s, *b, *e=str+len;
for (s=str ; s < e ; i++)
{
for ( ; (s < e) && strchr(" \t\r\n",s[0]); s++) ;
b=s;
for ( ; (s < e) && !strchr(" \t\r\n",s[0]); s++) ;
if (s == b || i > size)
break;
a[i]= (uint16) strtol(b,NULL,16);
}
return 0;
}
static int cs_enter(MY_XML_PARSER *st,const char *attr, size_t len)
{
struct my_cs_file_info *i= (struct my_cs_file_info *)st->user_data;
struct my_cs_file_section_st *s= cs_file_sec(attr,len);
if ( s && (s->state == _CS_CHARSET))
bzero(&i->cs,sizeof(i->cs));
if (s && (s->state == _CS_COLLATION))
i->tailoring_length= 0;
return MY_XML_OK;
}
static int cs_leave(MY_XML_PARSER *st,const char *attr, size_t len)
{
struct my_cs_file_info *i= (struct my_cs_file_info *)st->user_data;
struct my_cs_file_section_st *s= cs_file_sec(attr,len);
int state= s ? s->state : 0;
int rc;
switch(state){
case _CS_COLLATION:
rc= i->add_collation ? i->add_collation(&i->cs) : MY_XML_OK;
break;
default:
rc=MY_XML_OK;
}
return rc;
}
static int cs_value(MY_XML_PARSER *st,const char *attr, size_t len)
{
struct my_cs_file_info *i= (struct my_cs_file_info *)st->user_data;
struct my_cs_file_section_st *s;
int state= (int)((s=cs_file_sec(st->attr, strlen(st->attr))) ? s->state :
0);
switch (state) {
case _CS_ID:
i->cs.number= strtol(attr,(char**)NULL,10);
break;
case _CS_BINARY_ID:
i->cs.binary_number= strtol(attr,(char**)NULL,10);
break;
case _CS_PRIMARY_ID:
i->cs.primary_number= strtol(attr,(char**)NULL,10);
break;
case _CS_COLNAME:
i->cs.name=mstr(i->name,attr,len,MY_CS_NAME_SIZE-1);
break;
case _CS_CSNAME:
i->cs.csname=mstr(i->csname,attr,len,MY_CS_NAME_SIZE-1);
break;
case _CS_CSDESCRIPT:
i->cs.comment=mstr(i->comment,attr,len,MY_CS_CSDESCR_SIZE-1);
break;
case _CS_FLAG:
if (!strncmp("primary",attr,len))
i->cs.state|= MY_CS_PRIMARY;
else if (!strncmp("binary",attr,len))
i->cs.state|= MY_CS_BINSORT;
else if (!strncmp("compiled",attr,len))
i->cs.state|= MY_CS_COMPILED;
break;
case _CS_UPPERMAP:
fill_uchar(i->to_upper,MY_CS_TO_UPPER_TABLE_SIZE,attr,len);
i->cs.to_upper=i->to_upper;
break;
case _CS_LOWERMAP:
fill_uchar(i->to_lower,MY_CS_TO_LOWER_TABLE_SIZE,attr,len);
i->cs.to_lower=i->to_lower;
break;
case _CS_UNIMAP:
fill_uint16(i->tab_to_uni,MY_CS_TO_UNI_TABLE_SIZE,attr,len);
i->cs.tab_to_uni=i->tab_to_uni;
break;
case _CS_COLLMAP:
fill_uchar(i->sort_order,MY_CS_SORT_ORDER_TABLE_SIZE,attr,len);
i->cs.sort_order=i->sort_order;
break;
case _CS_CTYPEMAP:
fill_uchar(i->ctype,MY_CS_CTYPE_TABLE_SIZE,attr,len);
i->cs.ctype=i->ctype;
break;
case _CS_RESET:
case _CS_DIFF1:
case _CS_DIFF2:
case _CS_DIFF3:
{
/*
Convert collation description from
Locale Data Markup Language (LDML)
into ICU Collation Customization expression.
*/
char arg[16];
const char *cmd[]= {"&","<","<<","<<<"};
i->cs.tailoring= i->tailoring;
mstr(arg,attr,len,sizeof(arg)-1);
if (i->tailoring_length + 20 < sizeof(i->tailoring))
{
char *dst= i->tailoring_length + i->tailoring;
i->tailoring_length+= sprintf(dst," %s %s",cmd[state-_CS_RESET],arg);
}
}
}
return MY_XML_OK;
}
my_bool my_parse_charset_xml(const char *buf, size_t len,
int (*add_collation)(CHARSET_INFO *cs))
{
MY_XML_PARSER p;
struct my_cs_file_info i;
my_bool rc;
my_xml_parser_create(&p);
my_xml_set_enter_handler(&p,cs_enter);
my_xml_set_value_handler(&p,cs_value);
my_xml_set_leave_handler(&p,cs_leave);
i.add_collation= add_collation;
my_xml_set_user_data(&p,(void*)&i);
rc= (my_xml_parse(&p,buf,len) == MY_XML_OK) ? FALSE : TRUE;
my_xml_parser_free(&p);
return rc;
}
/*
Check repertoire: detect pure ascii strings
*/
uint
my_string_repertoire(CHARSET_INFO *cs, const char *str, ulong length)
{
const char *strend= str + length;
if (cs->mbminlen == 1)
{
for ( ; str < strend; str++)
{
if (((uchar) *str) > 0x7F)
return MY_REPERTOIRE_UNICODE30;
}
}
else
{
my_wc_t wc;
int chlen;
for (;
(chlen= cs->cset->mb_wc(cs, &wc, (uchar*) str, (uchar*) strend)) > 0;
str+= chlen)
{
if (wc > 0x7F)
return MY_REPERTOIRE_UNICODE30;
}
}
return MY_REPERTOIRE_ASCII;
}
/*
Returns repertoire for charset
*/
uint my_charset_repertoire(CHARSET_INFO *cs)
{
return cs->state & MY_CS_PUREASCII ?
MY_REPERTOIRE_ASCII : MY_REPERTOIRE_UNICODE30;
}
/*
Detect whether a character set is ASCII compatible.
Returns TRUE for:
- all 8bit character sets whose Unicode mapping of 0x7B is '{'
(ignores swe7 which maps 0x7B to "LATIN LETTER A WITH DIAERESIS")
- all multi-byte character sets having mbminlen == 1
(ignores ucs2 whose mbminlen is 2)
TODO:
When merging to 5.2, this function should be changed
to check a new flag MY_CS_NONASCII,
return (cs->flag & MY_CS_NONASCII) ? 0 : 1;
This flag was previously added into 5.2 under terms
of WL#3759 "Optimize identifier conversion in client-server protocol"
especially to mark character sets not compatible with ASCII.
We won't backport this flag to 5.0 or 5.1.
This function is Ok for 5.0 and 5.1, because we're not going
to introduce new tricky character sets between 5.0 and 5.2.
*/
my_bool
my_charset_is_ascii_based(CHARSET_INFO *cs)
{
return
(cs->mbmaxlen == 1 && cs->tab_to_uni && cs->tab_to_uni['{'] == '{') ||
(cs->mbminlen == 1 && cs->mbmaxlen > 1);
}
/*
Detect if a character set is 8bit,
and it is pure ascii, i.e. doesn't have
characters outside U+0000..U+007F
This functions is shared between "conf_to_src"
and dynamic charsets loader in "mysqld".
*/
my_bool
my_charset_is_8bit_pure_ascii(CHARSET_INFO *cs)
{
size_t code;
if (!cs->tab_to_uni)
return 0;
for (code= 0; code < 256; code++)
{
if (cs->tab_to_uni[code] > 0x7F)
return 0;
}
return 1;
}
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