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mariadb/strings/ctype.c
Alexander Barkov 62e137d4d7 Merge remote-tracking branch 'origin/10.4' into 10.5
2023-04-05 16:16:19 +04:00

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/* Copyright (c) 2000, 2013, Oracle and/or its affiliates.
Copyright (c) 2009, 2020, MariaDB Corporation.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
#include "strings_def.h"
#include <m_ctype.h>
#include <my_xml.h>
/*
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
*/
const char charset_name_latin2[]= "latin2";
const char charset_name_utf8[]= "utf8";
const char charset_name_utf16[]= "utf16";
const char charset_name_utf32[]= "utf32";
const char charset_name_ucs2[]= "ucs2";
const char charset_name_utf8mb4[]= "utf8mb4";
/*
Avoid using my_snprintf
We cannot use my_snprintf() here, because ctype.o is
used to build conf_to_src, which must require minimum
dependency.
*/
#undef my_snprinf
#define my_snprintf "We cannot use my_snprintf in this file"
int (*my_string_stack_guard)(int)= NULL;
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
/* Special purpose commands */
#define _CS_UCA_VERSION 100
#define _CS_CL_SUPPRESS_CONTRACTIONS 101
#define _CS_CL_OPTIMIZE 102
#define _CS_CL_SHIFT_AFTER_METHOD 103
#define _CS_CL_RULES_IMPORT 104
#define _CS_CL_RULES_IMPORT_SOURCE 105
/* Collation Settings */
#define _CS_ST_SETTINGS 200
#define _CS_ST_STRENGTH 201
#define _CS_ST_ALTERNATE 202
#define _CS_ST_BACKWARDS 203
#define _CS_ST_NORMALIZATION 204
#define _CS_ST_CASE_LEVEL 205
#define _CS_ST_CASE_FIRST 206
#define _CS_ST_HIRAGANA_QUATERNARY 207
#define _CS_ST_NUMERIC 208
#define _CS_ST_VARIABLE_TOP 209
#define _CS_ST_MATCH_BOUNDARIES 210
#define _CS_ST_MATCH_STYLE 211
/* Rules */
#define _CS_RULES 300
#define _CS_RESET 301
#define _CS_DIFF1 302
#define _CS_DIFF2 303
#define _CS_DIFF3 304
#define _CS_DIFF4 305
#define _CS_IDENTICAL 306
/* Rules: Expansions */
#define _CS_EXP_X 320
#define _CS_EXP_EXTEND 321
#define _CS_EXP_DIFF1 322
#define _CS_EXP_DIFF2 323
#define _CS_EXP_DIFF3 324
#define _CS_EXP_DIFF4 325
#define _CS_EXP_IDENTICAL 326
/* Rules: Abbreviating Ordering Specifications */
#define _CS_A_DIFF1 351
#define _CS_A_DIFF2 352
#define _CS_A_DIFF3 353
#define _CS_A_DIFF4 354
#define _CS_A_IDENTICAL 355
/* Rules: previous context */
#define _CS_CONTEXT 370
/* Rules: Placing Characters Before Others*/
#define _CS_RESET_BEFORE 380
/* Rules: Logical Reset Positions */
#define _CS_RESET_FIRST_PRIMARY_IGNORABLE 401
#define _CS_RESET_LAST_PRIMARY_IGNORABLE 402
#define _CS_RESET_FIRST_SECONDARY_IGNORABLE 403
#define _CS_RESET_LAST_SECONDARY_IGNORABLE 404
#define _CS_RESET_FIRST_TERTIARY_IGNORABLE 405
#define _CS_RESET_LAST_TERTIARY_IGNORABLE 406
#define _CS_RESET_FIRST_TRAILING 407
#define _CS_RESET_LAST_TRAILING 408
#define _CS_RESET_FIRST_VARIABLE 409
#define _CS_RESET_LAST_VARIABLE 410
#define _CS_RESET_FIRST_NON_IGNORABLE 411
#define _CS_RESET_LAST_NON_IGNORABLE 412
static const 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_MISC, "charsets/copyright"},
{_CS_MISC, "charsets/description"},
{_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"},
/* Special purpose commands */
{_CS_UCA_VERSION, "charsets/charset/collation/version"},
{_CS_CL_SUPPRESS_CONTRACTIONS, "charsets/charset/collation/suppress_contractions"},
{_CS_CL_OPTIMIZE, "charsets/charset/collation/optimize"},
{_CS_CL_SHIFT_AFTER_METHOD, "charsets/charset/collation/shift-after-method"},
{_CS_CL_RULES_IMPORT, "charsets/charset/collation/rules/import"},
{_CS_CL_RULES_IMPORT_SOURCE, "charsets/charset/collation/rules/import/source"},
/* Collation Settings */
{_CS_ST_SETTINGS, "charsets/charset/collation/settings"},
{_CS_ST_STRENGTH, "charsets/charset/collation/settings/strength"},
{_CS_ST_ALTERNATE, "charsets/charset/collation/settings/alternate"},
{_CS_ST_BACKWARDS, "charsets/charset/collation/settings/backwards"},
{_CS_ST_NORMALIZATION, "charsets/charset/collation/settings/normalization"},
{_CS_ST_CASE_LEVEL, "charsets/charset/collation/settings/caseLevel"},
{_CS_ST_CASE_FIRST, "charsets/charset/collation/settings/caseFirst"},
{_CS_ST_HIRAGANA_QUATERNARY, "charsets/charset/collation/settings/hiraganaQuaternary"},
{_CS_ST_NUMERIC, "charsets/charset/collation/settings/numeric"},
{_CS_ST_VARIABLE_TOP, "charsets/charset/collation/settings/variableTop"},
{_CS_ST_MATCH_BOUNDARIES, "charsets/charset/collation/settings/match-boundaries"},
{_CS_ST_MATCH_STYLE, "charsets/charset/collation/settings/match-style"},
/* Rules */
{_CS_RULES, "charsets/charset/collation/rules"},
{_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"},
{_CS_DIFF4, "charsets/charset/collation/rules/q"},
{_CS_IDENTICAL, "charsets/charset/collation/rules/i"},
/* Rules: expansions */
{_CS_EXP_X, "charsets/charset/collation/rules/x"},
{_CS_EXP_EXTEND, "charsets/charset/collation/rules/x/extend"},
{_CS_EXP_DIFF1, "charsets/charset/collation/rules/x/p"},
{_CS_EXP_DIFF2, "charsets/charset/collation/rules/x/s"},
{_CS_EXP_DIFF3, "charsets/charset/collation/rules/x/t"},
{_CS_EXP_DIFF4, "charsets/charset/collation/rules/x/q"},
{_CS_EXP_IDENTICAL, "charsets/charset/collation/rules/x/i"},
/* Rules: previous context */
{_CS_CONTEXT, "charsets/charset/collation/rules/x/context"},
/* Rules: Abbreviating Ordering Specifications */
{_CS_A_DIFF1, "charsets/charset/collation/rules/pc"},
{_CS_A_DIFF2, "charsets/charset/collation/rules/sc"},
{_CS_A_DIFF3, "charsets/charset/collation/rules/tc"},
{_CS_A_DIFF4, "charsets/charset/collation/rules/qc"},
{_CS_A_IDENTICAL, "charsets/charset/collation/rules/ic"},
/* Rules: Placing Characters Before Others*/
{_CS_RESET_BEFORE, "charsets/charset/collation/rules/reset/before"},
/* Rules: Logical Reset Positions */
{_CS_RESET_FIRST_NON_IGNORABLE, "charsets/charset/collation/rules/reset/first_non_ignorable"},
{_CS_RESET_LAST_NON_IGNORABLE, "charsets/charset/collation/rules/reset/last_non_ignorable"},
{_CS_RESET_FIRST_PRIMARY_IGNORABLE, "charsets/charset/collation/rules/reset/first_primary_ignorable"},
{_CS_RESET_LAST_PRIMARY_IGNORABLE, "charsets/charset/collation/rules/reset/last_primary_ignorable"},
{_CS_RESET_FIRST_SECONDARY_IGNORABLE, "charsets/charset/collation/rules/reset/first_secondary_ignorable"},
{_CS_RESET_LAST_SECONDARY_IGNORABLE, "charsets/charset/collation/rules/reset/last_secondary_ignorable"},
{_CS_RESET_FIRST_TERTIARY_IGNORABLE, "charsets/charset/collation/rules/reset/first_tertiary_ignorable"},
{_CS_RESET_LAST_TERTIARY_IGNORABLE, "charsets/charset/collation/rules/reset/last_tertiary_ignorable"},
{_CS_RESET_FIRST_TRAILING, "charsets/charset/collation/rules/reset/first_trailing"},
{_CS_RESET_LAST_TRAILING, "charsets/charset/collation/rules/reset/last_trailing"},
{_CS_RESET_FIRST_VARIABLE, "charsets/charset/collation/rules/reset/first_variable"},
{_CS_RESET_LAST_VARIABLE, "charsets/charset/collation/rules/reset/last_variable"},
{0, NULL}
};
static const struct my_cs_file_section_st
*cs_file_sec(const char *attr, size_t len)
{
const struct my_cs_file_section_st *s;
for (s=sec; s->str; s++)
{
if (!strncmp(attr, s->str, len) && s->str[len] == 0)
return s;
}
return NULL;
}
#define MY_CS_CSDESCR_SIZE 64
#define MY_CS_TAILORING_SIZE (32*1024)
#define MY_CS_UCA_VERSION_SIZE 64
#define MY_CS_CONTEXT_SIZE 64
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;
size_t tailoring_length;
size_t tailoring_alloced_length;
char context[MY_CS_CONTEXT_SIZE];
struct charset_info_st cs;
MY_CHARSET_LOADER *loader;
} MY_CHARSET_FILE;
static void
my_charset_file_reset_charset(MY_CHARSET_FILE *i)
{
memset(&i->cs, 0, sizeof(i->cs));
}
static void
my_charset_file_reset_collation(MY_CHARSET_FILE *i)
{
i->tailoring_length= 0;
i->context[0]= '\0';
}
static void
my_charset_file_init(MY_CHARSET_FILE *i)
{
my_charset_file_reset_charset(i);
my_charset_file_reset_collation(i);
i->tailoring= NULL;
i->tailoring_alloced_length= 0;
}
static void
my_charset_file_free(MY_CHARSET_FILE *i)
{
i->loader->free(i->tailoring);
}
static int
my_charset_file_tailoring_realloc(MY_CHARSET_FILE *i, size_t newlen)
{
if (i->tailoring_alloced_length > newlen ||
(i->tailoring= i->loader->realloc(i->tailoring,
(i->tailoring_alloced_length=
(newlen + 32*1024)))))
{
return MY_XML_OK;
}
return MY_XML_ERROR;
}
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
tailoring_append(MY_XML_PARSER *st,
const char *fmt, size_t len, const char *attr)
{
struct my_cs_file_info *i= (struct my_cs_file_info *) st->user_data;
size_t newlen= i->tailoring_length + len + 64; /* 64 for format */
if (MY_XML_OK == my_charset_file_tailoring_realloc(i, newlen))
{
char *dst= i->tailoring + i->tailoring_length;
sprintf(dst, fmt, (int) len, attr);
i->tailoring_length+= strlen(dst);
return MY_XML_OK;
}
return MY_XML_ERROR;
}
static int
tailoring_append2(MY_XML_PARSER *st,
const char *fmt,
size_t len1, const char *attr1,
size_t len2, const char *attr2)
{
struct my_cs_file_info *i= (struct my_cs_file_info *) st->user_data;
size_t newlen= i->tailoring_length + len1 + len2 + 64; /* 64 for format */
if (MY_XML_OK == my_charset_file_tailoring_realloc(i, newlen))
{
char *dst= i->tailoring + i->tailoring_length;
sprintf(dst, fmt, (int) len1, attr1, (int) len2, attr2);
i->tailoring_length+= strlen(dst);
return MY_XML_OK;
}
return MY_XML_ERROR;
}
static size_t
scan_one_character(const char *s, const char *e, my_wc_t *wc)
{
CHARSET_INFO *cs= &my_charset_utf8mb3_general_ci;
if (s >= e)
return 0;
/* Escape sequence: \uXXXX */
if (s[0] == '\\' && s + 2 < e && s[1] == 'u' && my_isxdigit(cs, s[2]))
{
size_t len= 3; /* We have at least one digit */
for (s+= 3; s < e && my_isxdigit(cs, s[0]); s++, len++)
{
}
wc[0]= 0;
return len;
}
else if ((int8) s[0] > 0) /* 7-bit character */
{
wc[0]= 0;
return 1;
}
else /* Non-escaped character */
{
int rc= my_ci_mb_wc(cs, wc, (uchar *) s, (uchar *) e);
if (rc > 0)
return (size_t) rc;
}
return 0;
}
static int
tailoring_append_abbreviation(MY_XML_PARSER *st,
const char *fmt, size_t len, const char *attr)
{
size_t clen;
const char *attrend= attr + len;
my_wc_t wc;
for ( ; (clen= scan_one_character(attr, attrend, &wc)) > 0; attr+= clen)
{
DBUG_ASSERT(attr < attrend);
if (tailoring_append(st, fmt, clen, attr) != MY_XML_OK)
return MY_XML_ERROR;
}
return MY_XML_OK;
}
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;
const struct my_cs_file_section_st *s= cs_file_sec(attr,len);
int state= s ? s->state : 0;
switch (state) {
case 0:
i->loader->reporter(WARNING_LEVEL, "Unknown LDML tag: '%.*s'", len, attr);
break;
case _CS_CHARSET:
my_charset_file_reset_charset(i);
break;
case _CS_COLLATION:
my_charset_file_reset_collation(i);
break;
case _CS_RESET:
return tailoring_append(st, " &", 0, NULL);
default:
break;
}
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;
const 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:
if (i->tailoring_length)
i->cs.tailoring= i->tailoring;
rc= i->loader->add_collation ? i->loader->add_collation(&i->cs) : MY_XML_OK;
break;
/* Rules: Logical Reset Positions */
case _CS_RESET_FIRST_NON_IGNORABLE:
rc= tailoring_append(st, "[first non-ignorable]", 0, NULL);
break;
case _CS_RESET_LAST_NON_IGNORABLE:
rc= tailoring_append(st, "[last non-ignorable]", 0, NULL);
break;
case _CS_RESET_FIRST_PRIMARY_IGNORABLE:
rc= tailoring_append(st, "[first primary ignorable]", 0, NULL);
break;
case _CS_RESET_LAST_PRIMARY_IGNORABLE:
rc= tailoring_append(st, "[last primary ignorable]", 0, NULL);
break;
case _CS_RESET_FIRST_SECONDARY_IGNORABLE:
rc= tailoring_append(st, "[first secondary ignorable]", 0, NULL);
break;
case _CS_RESET_LAST_SECONDARY_IGNORABLE:
rc= tailoring_append(st, "[last secondary ignorable]", 0, NULL);
break;
case _CS_RESET_FIRST_TERTIARY_IGNORABLE:
rc= tailoring_append(st, "[first tertiary ignorable]", 0, NULL);
break;
case _CS_RESET_LAST_TERTIARY_IGNORABLE:
rc= tailoring_append(st, "[last tertiary ignorable]", 0, NULL);
break;
case _CS_RESET_FIRST_TRAILING:
rc= tailoring_append(st, "[first trailing]", 0, NULL);
break;
case _CS_RESET_LAST_TRAILING:
rc= tailoring_append(st, "[last trailing]", 0, NULL);
break;
case _CS_RESET_FIRST_VARIABLE:
rc= tailoring_append(st, "[first variable]", 0, NULL);
break;
case _CS_RESET_LAST_VARIABLE:
rc= tailoring_append(st, "[last variable]", 0, NULL);
break;
default:
rc=MY_XML_OK;
}
return rc;
}
static const char *diff_fmt[5]=
{
"<%.*s",
"<<%.*s",
"<<<%.*s",
"<<<<%.*s",
"=%.*s"
};
static const char *context_diff_fmt[5]=
{
"<%.*s|%.*s",
"<<%.*s|%.*s",
"<<<%.*s|%.*s",
"<<<<%.*s|%.*s",
"=%.*s|%.*s"
};
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;
const struct my_cs_file_section_st *s;
int state= (int)((s= cs_file_sec(st->attr.start,
st->attr.end - st->attr.start)) ?
s->state : 0);
int rc= MY_XML_OK;
switch (state) {
case _CS_MISC:
case _CS_FAMILY:
case _CS_ORDER:
break;
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;
else if (!strncmp("nopad",attr,len))
i->cs.state|= MY_CS_NOPAD;
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.m_ctype=i->ctype;
break;
/* Special purpose commands */
case _CS_UCA_VERSION:
rc= tailoring_append(st, "[version %.*s]", len, attr);
break;
case _CS_CL_RULES_IMPORT_SOURCE:
rc= tailoring_append(st, "[import %.*s]", len, attr);
break;
case _CS_CL_SUPPRESS_CONTRACTIONS:
rc= tailoring_append(st, "[suppress contractions %.*s]", len, attr);
break;
case _CS_CL_OPTIMIZE:
rc= tailoring_append(st, "[optimize %.*s]", len, attr);
break;
case _CS_CL_SHIFT_AFTER_METHOD:
rc= tailoring_append(st, "[shift-after-method %.*s]", len, attr);
break;
/* Collation Settings */
case _CS_ST_STRENGTH:
/* 1, 2, 3, 4, 5, or primary, secondary, tertiary, quaternary, identical */
rc= tailoring_append(st, "[strength %.*s]", len, attr);
if (len && attr[0] >= '1' && attr[0] <= '9')
i->cs.levels_for_order= attr[0] - '0';
break;
case _CS_ST_ALTERNATE:
/* non-ignorable, shifted */
rc= tailoring_append(st, "[alternate %.*s]", len, attr);
break;
case _CS_ST_BACKWARDS:
/* on, off, 2 */
rc= tailoring_append(st, "[backwards %.*s]", len, attr);
break;
case _CS_ST_NORMALIZATION:
/*
TODO for WL#896: check collations for normalization: vi.xml
We want precomposed characters work well at this point.
*/
/* on, off */
rc= tailoring_append(st, "[normalization %.*s]", len, attr);
break;
case _CS_ST_CASE_LEVEL:
/* on, off */
rc= tailoring_append(st, "[caseLevel %.*s]", len, attr);
break;
case _CS_ST_CASE_FIRST:
/* upper, lower, off */
rc= tailoring_append(st, "[caseFirst %.*s]", len, attr);
break;
case _CS_ST_HIRAGANA_QUATERNARY:
/* on, off */
rc= tailoring_append(st, "[hiraganaQ %.*s]", len, attr);
break;
case _CS_ST_NUMERIC:
/* on, off */
rc= tailoring_append(st, "[numeric %.*s]", len, attr);
break;
case _CS_ST_VARIABLE_TOP:
/* TODO for WL#896: check value format */
rc= tailoring_append(st, "[variableTop %.*s]", len, attr);
break;
case _CS_ST_MATCH_BOUNDARIES:
/* none, whole-character, whole-word */
rc= tailoring_append(st, "[match-boundaries %.*s]", len, attr);
break;
case _CS_ST_MATCH_STYLE:
/* minimal, medial, maximal */
rc= tailoring_append(st, "[match-style %.*s]", len, attr);
break;
/* Rules */
case _CS_RESET:
rc= tailoring_append(st, "%.*s", len, attr);
break;
case _CS_DIFF1:
case _CS_DIFF2:
case _CS_DIFF3:
case _CS_DIFF4:
case _CS_IDENTICAL:
rc= tailoring_append(st, diff_fmt[state - _CS_DIFF1], len, attr);
break;
/* Rules: Expansion */
case _CS_EXP_EXTEND:
rc= tailoring_append(st, " / %.*s", len, attr);
break;
case _CS_EXP_DIFF1:
case _CS_EXP_DIFF2:
case _CS_EXP_DIFF3:
case _CS_EXP_DIFF4:
case _CS_EXP_IDENTICAL:
if (i->context[0])
{
rc= tailoring_append2(st, context_diff_fmt[state - _CS_EXP_DIFF1],
strlen(i->context), i->context, len, attr);
i->context[0]= 0;
}
else
rc= tailoring_append(st, diff_fmt[state - _CS_EXP_DIFF1], len, attr);
break;
/* Rules: Context */
case _CS_CONTEXT:
if (len < sizeof(i->context))
{
memcpy(i->context, attr, len);
i->context[len]= '\0';
}
break;
/* Rules: Abbreviating Ordering Specifications */
case _CS_A_DIFF1:
case _CS_A_DIFF2:
case _CS_A_DIFF3:
case _CS_A_DIFF4:
case _CS_A_IDENTICAL:
rc= tailoring_append_abbreviation(st, diff_fmt[state - _CS_A_DIFF1], len, attr);
break;
/* Rules: Placing Characters Before Others */
case _CS_RESET_BEFORE:
/*
TODO for WL#896: Add this check into text customization parser:
It is an error if the strength of the before relation is not identical
to the relation after the reset. We'll need this for WL#896.
*/
rc= tailoring_append(st, "[before %.*s]", len, attr);
break;
default:
break;
}
return rc;
}
my_bool
my_parse_charset_xml(MY_CHARSET_LOADER *loader, const char *buf, size_t len)
{
MY_XML_PARSER p;
struct my_cs_file_info info;
my_bool rc;
my_charset_file_init(&info);
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);
info.loader= loader;
my_xml_set_user_data(&p, (void *) &info);
rc= (my_xml_parse(&p,buf,len) == MY_XML_OK) ? FALSE : TRUE;
my_xml_parser_free(&p);
my_charset_file_free(&info);
if (rc != MY_XML_OK)
{
const char *errstr= my_xml_error_string(&p);
if (sizeof(loader->error) > 32 + strlen(errstr))
{
/* We cannot use my_snprintf() here. See previous comment. */
sprintf(loader->error, "at line %d pos %d: %s",
my_xml_error_lineno(&p)+1,
(int) my_xml_error_pos(&p),
my_xml_error_string(&p));
}
}
return rc;
}
uint
my_string_repertoire_8bit(CHARSET_INFO *cs, const char *str, size_t length)
{
const char *strend;
if ((cs->state & MY_CS_NONASCII) && length > 0)
return MY_REPERTOIRE_UNICODE30;
for (strend= str + length; str < strend; str++)
{
if (((uchar) *str) > 0x7F)
return MY_REPERTOIRE_UNICODE30;
}
return MY_REPERTOIRE_ASCII;
}
static void
my_string_metadata_init(MY_STRING_METADATA *metadata)
{
metadata->repertoire= MY_REPERTOIRE_ASCII;
metadata->char_length= 0;
}
/**
This should probably eventually go as a virtual function into
MY_CHARSET_HANDLER or MY_COLLATION_HANDLER.
*/
static void
my_string_metadata_get_mb(MY_STRING_METADATA *metadata,
CHARSET_INFO *cs, const char *str, ulong length)
{
const char *strend= str + length;
for (my_string_metadata_init(metadata) ;
str < strend;
metadata->char_length++)
{
my_wc_t wc;
int mblen= my_ci_mb_wc(cs, &wc, (const uchar *) str, (const uchar *) strend);
if (mblen > 0) /* Assigned character */
{
if (wc > 0x7F)
metadata->repertoire|= MY_REPERTOIRE_EXTENDED;
str+= mblen;
}
else if (mblen == MY_CS_ILSEQ) /* Bad byte sequence */
{
metadata->repertoire|= MY_REPERTOIRE_EXTENDED;
str++;
}
else if (mblen > MY_CS_TOOSMALL) /* Unassigned character */
{
metadata->repertoire|= MY_REPERTOIRE_EXTENDED;
str+= (-mblen);
}
else /* Incomplete character, premature end-of-line */
{
metadata->repertoire|= MY_REPERTOIRE_EXTENDED; /* Just in case */
break;
}
}
}
/**
Collect string metadata: length in characters and repertoire.
*/
void
my_string_metadata_get(MY_STRING_METADATA *metadata,
CHARSET_INFO *cs, const char *str, size_t length)
{
if (cs->mbmaxlen == 1 && !(cs->state & MY_CS_NONASCII))
{
metadata->char_length= length;
metadata->repertoire= my_string_repertoire_8bit(cs, str, (ulong)length);
}
else
{
my_string_metadata_get_mb(metadata, cs, str, (ulong)length);
}
}
/*
Check repertoire: detect pure ascii strings
*/
my_repertoire_t
my_string_repertoire(CHARSET_INFO *cs, const char *str, size_t length)
{
if (cs->mbminlen == 1 && !(cs->state & MY_CS_NONASCII))
{
return my_string_repertoire_8bit(cs, str, length);
}
else
{
const char *strend= str + length;
my_wc_t wc;
int chlen;
for (;
(chlen= my_ci_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
*/
my_repertoire_t 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 Unicode code point is printable.
*/
static inline my_bool
my_is_printable(my_wc_t wc)
{
/*
Blocks:
U+0000 .. U+001F control
U+0020 .. U+007E printable
U+007F .. U+009F control
U+00A0 .. U+00FF printable
U+0100 .. U+10FFFF As of Unicode-6.1.0, this range does not have any
characters of the "Cc" (Other, control) category.
Should be mostly safe to print.
Except for the surrogate halfs,
which are encoding components, not real characters.
*/
if (wc >= 0x20 && wc <= 0x7E) /* Quickly detect ASCII printable */
return TRUE;
if (wc <= 0x9F) /* The rest of U+0000..U+009F are control characters */
{
/* NL, CR, TAB are Ok */
return (wc == '\r' || wc == '\n' || wc == '\t');
}
/*
Surrogate halfs (when alone) print badly in terminals:
SELECT _ucs2 0xD800;
Let's escape them as well.
*/
if (wc >= 0xD800 && wc <= 0xDFFF)
return FALSE;
return TRUE;
}
static uint to_printable_8bit(uchar *dst, my_wc_t wc, uint bs)
{
/*
This function is used only in context of error messages for now.
All non-BMP characters are currently replaced to question marks
when a message is put into diagnostics area.
*/
DBUG_ASSERT(wc < 0x10000);
*dst++= (char) bs;
*dst++= _dig_vec_upper[(wc >> 12) & 0x0F];
*dst++= _dig_vec_upper[(wc >> 8) & 0x0F];
*dst++= _dig_vec_upper[(wc >> 4) & 0x0F];
*dst++= _dig_vec_upper[wc & 0x0F];
return MY_CS_PRINTABLE_CHAR_LENGTH;
}
static uint my_printable_length(uint bslen, uint diglen)
{
return bslen + (MY_CS_PRINTABLE_CHAR_LENGTH - 1) * diglen;
}
/**
Encode an Unicode character "wc" into a printable string.
This function is suitable for any character set, including
ASCII-incompatible multi-byte character sets, e.g. ucs2, utf16, utf32.
*/
int
my_wc_to_printable_ex(CHARSET_INFO *cs, my_wc_t wc,
uchar *str, uchar *end,
uint bs, uint bslen, uint diglen)
{
uchar *str0;
uint i, length;
uchar tmp[MY_CS_PRINTABLE_CHAR_LENGTH * MY_CS_MBMAXLEN];
if (my_is_printable(wc))
{
int mblen= my_ci_wc_mb(cs, wc, str, end);
if (mblen > 0)
return mblen;
}
if (str + my_printable_length(bslen, diglen) > end)
return MY_CS_TOOSMALLN(my_printable_length(bslen, diglen));
if ((cs->state & MY_CS_NONASCII) == 0)
return to_printable_8bit(str, wc, bs);
length= to_printable_8bit(tmp, wc, bs);
str0= str;
for (i= 0; i < length; i++)
{
uint expected_length= i == 0 ? bslen : diglen;
if (my_ci_wc_mb(cs, tmp[i], str, end) != (int) expected_length)
{
DBUG_ASSERT(0);
return MY_CS_ILSEQ;
}
str+= expected_length;
}
return (int) (str - str0);
}
int
my_wc_to_printable_8bit(CHARSET_INFO *cs, my_wc_t wc,
uchar *str, uchar *end)
{
/*
Special case: swe7 does not have the backslash character.
Use dot instead of backslash for escaping.
*/
uint bs= cs->tab_to_uni && cs->tab_to_uni['\\'] != '\\' ? '.' : '\\';
DBUG_ASSERT(cs->mbminlen == 1);
/*
Additionally, if the original swe7 string contains backslashes,
replace them to dots, so this error message:
Invalid swe7 character string: '\xEF\xBC\xB4'
is displayed as:
Invalid swe7 character string: '.xEF.xBC.xB4'
which is more readable than what would happen without '\'-to-dot mapping:
Invalid swe7 character string: '.005CxEF.005CxBC.005CxB4'
*/
if (bs == '.' && wc == '\\')
wc= '.';
return my_wc_to_printable_ex(cs, wc, str, end, bs, 1, 1);
}
int
my_wc_to_printable_generic(CHARSET_INFO *cs, my_wc_t wc,
uchar *str, uchar *end)
{
return my_wc_to_printable_ex(cs, wc, str, end, '\\',
cs->mbminlen, cs->mbminlen);
}
/*
Convert a string between two character sets.
'to' must be large enough to store (form_length * to_cs->mbmaxlen) bytes.
@param to[OUT] Store result here
@param to_length Size of "to" buffer
@param to_cs Character set of result string
@param from Copy from here
@param from_length Length of the "from" string
@param from_cs Character set of the "from" string
@param errors[OUT] Number of conversion errors
@return Number of bytes copied to 'to' string
*/
uint32
my_convert_using_func(char *to, size_t to_length,
CHARSET_INFO *to_cs, my_charset_conv_wc_mb wc_mb,
const char *from, size_t from_length,
CHARSET_INFO *from_cs, my_charset_conv_mb_wc mb_wc,
uint *errors)
{
int cnvres;
my_wc_t wc;
const uchar *from_end= (const uchar*) from + from_length;
char *to_start= to;
uchar *to_end= (uchar*) to + to_length;
uint error_count= 0;
while (1)
{
if ((cnvres= (*mb_wc)(from_cs, &wc, (uchar*) from, from_end)) > 0)
from+= cnvres;
else if (cnvres == MY_CS_ILSEQ)
{
error_count++;
from++;
wc= '?';
}
else if (cnvres > MY_CS_TOOSMALL)
{
/*
A correct multibyte sequence detected
But it doesn't have Unicode mapping.
*/
error_count++;
from+= (-cnvres);
wc= '?';
}
else
{
if ((uchar *) from >= from_end)
break; /* End of line */
/* Incomplete byte sequence */
error_count++;
from++;
wc= '?';
}
outp:
if ((cnvres= (*wc_mb)(to_cs, wc, (uchar*) to, to_end)) > 0)
to+= cnvres;
else if (cnvres == MY_CS_ILUNI && wc != '?')
{
error_count++;
wc= '?';
goto outp;
}
else
break;
}
*errors= error_count;
return (uint32) (to - to_start);
}
/*
Convert a string between two character sets.
Optimized for quick copying of ASCII characters in the range 0x00..0x7F.
'to' must be large enough to store (form_length * to_cs->mbmaxlen) bytes.
@param to[OUT] Store result here
@param to_length Size of "to" buffer
@param to_cs Character set of result string
@param from Copy from here
@param from_length Length of the "from" string
@param from_cs Character set of the "from" string
@param errors[OUT] Number of conversion errors
@return Number of bytes copied to 'to' string
*/
uint32
my_convert(char *to, uint32 to_length, CHARSET_INFO *to_cs,
const char *from, uint32 from_length,
CHARSET_INFO *from_cs, uint *errors)
{
uint32 length, length2;
/*
If any of the character sets is not ASCII compatible,
immediately switch to slow mb_wc->wc_mb method.
*/
if ((to_cs->state | from_cs->state) & MY_CS_NONASCII)
return my_convert_using_func(to, to_length,
to_cs, to_cs->cset->wc_mb,
from, from_length,
from_cs, from_cs->cset->mb_wc,
errors);
length= length2= MY_MIN(to_length, from_length);
#if defined(__i386__) || defined(__x86_64__)
/*
Special loop for i386, it allows to refer to a
non-aligned memory block as UINT32, which makes
it possible to copy four bytes at once. This
gives about 10% performance improvement comparing
to byte-by-byte loop.
*/
for ( ; length >= 4; length-= 4, from+= 4, to+= 4)
{
if ((*(uint32*)from) & 0x80808080)
break;
*((uint32*) to)= *((const uint32*) from);
}
#endif /* __i386__ */
for (; ; *to++= *from++, length--)
{
if (!length)
{
*errors= 0;
return length2;
}
if (*((unsigned char*) from) > 0x7F) /* A non-ASCII character */
{
uint32 copied_length= length2 - length;
to_length-= copied_length;
from_length-= copied_length;
return copied_length + my_convert_using_func(to, to_length, to_cs,
to_cs->cset->wc_mb,
from, from_length, from_cs,
from_cs->cset->mb_wc,
errors);
}
}
DBUG_ASSERT(FALSE); // Should never get to here
return 0; // Make compiler happy
}
size_t
my_convert_fix(CHARSET_INFO *to_cs, char *to, size_t to_length,
CHARSET_INFO *from_cs, const char *from, size_t from_length,
size_t nchars,
MY_STRCOPY_STATUS *copy_status,
MY_STRCONV_STATUS *conv_status)
{
int cnvres;
my_wc_t wc;
my_charset_conv_mb_wc mb_wc= from_cs->cset->mb_wc;
my_charset_conv_wc_mb wc_mb= to_cs->cset->wc_mb;
const uchar *from_end= (const uchar*) from + from_length;
uchar *to_end= (uchar*) to + to_length;
char *to_start= to;
DBUG_ASSERT(to_cs != &my_charset_bin);
DBUG_ASSERT(from_cs != &my_charset_bin);
copy_status->m_well_formed_error_pos= NULL;
conv_status->m_cannot_convert_error_pos= NULL;
for ( ; nchars; nchars--)
{
const char *from_prev= from;
if ((cnvres= (*mb_wc)(from_cs, &wc, (uchar*) from, from_end)) > 0)
from+= cnvres;
else if (cnvres == MY_CS_ILSEQ)
{
if (!copy_status->m_well_formed_error_pos)
copy_status->m_well_formed_error_pos= from;
from++;
wc= '?';
}
else if (cnvres > MY_CS_TOOSMALL)
{
/*
A correct multibyte sequence detected
But it doesn't have Unicode mapping.
*/
if (!conv_status->m_cannot_convert_error_pos)
conv_status->m_cannot_convert_error_pos= from;
from+= (-cnvres);
wc= '?';
}
else
{
if ((uchar *) from >= from_end)
break; // End of line
// Incomplete byte sequence
if (!copy_status->m_well_formed_error_pos)
copy_status->m_well_formed_error_pos= from;
from++;
wc= '?';
}
outp:
if ((cnvres= (*wc_mb)(to_cs, wc, (uchar*) to, to_end)) > 0)
to+= cnvres;
else if (cnvres == MY_CS_ILUNI && wc != '?')
{
if (!conv_status->m_cannot_convert_error_pos)
conv_status->m_cannot_convert_error_pos= from_prev;
wc= '?';
goto outp;
}
else
{
from= from_prev;
break;
}
}
copy_status->m_source_end_pos= from;
return to - to_start;
}
int my_strnncollsp_nchars_generic(CHARSET_INFO *cs,
const uchar *str1, size_t len1,
const uchar *str2, size_t len2,
size_t nchars,
uint flags)
{
int error;
len1= my_well_formed_length(cs, (const char *) str1,
(const char *) str1 + len1,
nchars, &error);
len2= my_well_formed_length(cs, (const char *) str2,
(const char *) str2 + len2,
nchars, &error);
DBUG_ASSERT((cs->state & MY_CS_NOPAD) == 0);
return cs->coll->strnncollsp(cs, str1, len1, str2, len2);
}
int my_strnncollsp_nchars_generic_8bit(CHARSET_INFO *cs,
const uchar *str1, size_t len1,
const uchar *str2, size_t len2,
size_t nchars,
uint flags)
{
set_if_smaller(len1, nchars);
set_if_smaller(len2, nchars);
DBUG_ASSERT((cs->state & MY_CS_NOPAD) == 0);
return cs->coll->strnncollsp(cs, str1, len1, str2, len2);
}
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