diff options
Diffstat (limited to 'mysys/charset.c')
| -rw-r--r-- | mysys/charset.c | 1609 |
1 files changed, 1609 insertions, 0 deletions
diff --git a/mysys/charset.c b/mysys/charset.c new file mode 100644 index 00000000..67abfe62 --- /dev/null +++ b/mysys/charset.c @@ -0,0 +1,1609 @@ +/* + Copyright (c) 2000, 2011, 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 "mysys_priv.h" +#include "mysys_err.h" +#include <m_ctype.h> +#include <m_string.h> +#include <my_dir.h> +#include <hash.h> +#include <my_xml.h> +#ifdef HAVE_LANGINFO_H +#include <langinfo.h> +#endif +#ifdef HAVE_LOCALE_H +#include <locale.h> +#endif + +extern HASH charset_name_hash; + +/* + The code below implements this functionality: + + - Initializing charset related structures + - Loading dynamic charsets + - Searching for a proper CHARSET_INFO + using charset name, collation name or collation ID + - Setting server default character set +*/ + +static uint +get_collation_number_internal(const char *name) +{ + + CHARSET_INFO **cs; + for (cs= all_charsets; + cs < all_charsets + array_elements(all_charsets); + cs++) + { + if (cs[0] && cs[0]->coll_name.str && + !my_strcasecmp(&my_charset_latin1, cs[0]->coll_name.str, name)) + return cs[0]->number; + } + return 0; +} + + +static my_bool is_multi_byte_ident(CHARSET_INFO *cs, uchar ch) +{ + int chlen= my_ci_charlen(cs, &ch, &ch + 1); + return MY_CS_IS_TOOSMALL(chlen) ? TRUE : FALSE; +} + +static my_bool init_state_maps(struct charset_info_st *cs) +{ + uint i; + uchar *state_map; + uchar *ident_map; + + if (!(cs->state_map= state_map= (uchar*) my_once_alloc(256*2, MYF(MY_WME)))) + return 1; + + cs->ident_map= ident_map= state_map + 256; + + /* Fill state_map with states to get a faster parser */ + for (i=0; i < 256 ; i++) + { + if (my_isalpha(cs,i)) + state_map[i]=(uchar) MY_LEX_IDENT; + else if (my_isdigit(cs,i)) + state_map[i]=(uchar) MY_LEX_NUMBER_IDENT; + else if (is_multi_byte_ident(cs, i)) + state_map[i]=(uchar) MY_LEX_IDENT; + else if (my_isspace(cs,i)) + state_map[i]=(uchar) MY_LEX_SKIP; + else + state_map[i]=(uchar) MY_LEX_CHAR; + } + state_map[(uchar)'_']=state_map[(uchar)'$']=(uchar) MY_LEX_IDENT; + state_map[(uchar)'\'']=(uchar) MY_LEX_STRING; + state_map[(uchar)'.']=(uchar) MY_LEX_REAL_OR_POINT; + state_map[(uchar)'>']=state_map[(uchar)'=']=state_map[(uchar)'!']= (uchar) MY_LEX_CMP_OP; + state_map[(uchar)'<']= (uchar) MY_LEX_LONG_CMP_OP; + state_map[(uchar)'&']=state_map[(uchar)'|']=(uchar) MY_LEX_BOOL; + state_map[(uchar)'#']=(uchar) MY_LEX_COMMENT; + state_map[(uchar)';']=(uchar) MY_LEX_SEMICOLON; + state_map[(uchar)':']=(uchar) MY_LEX_SET_VAR; + state_map[0]=(uchar) MY_LEX_EOL; + state_map[(uchar)'\\']= (uchar) MY_LEX_ESCAPE; + state_map[(uchar)'/']= (uchar) MY_LEX_LONG_COMMENT; + state_map[(uchar)'*']= (uchar) MY_LEX_END_LONG_COMMENT; + state_map[(uchar)'@']= (uchar) MY_LEX_USER_END; + state_map[(uchar) '`']= (uchar) MY_LEX_USER_VARIABLE_DELIMITER; + state_map[(uchar)'"']= (uchar) MY_LEX_STRING_OR_DELIMITER; + state_map[(uchar)'-']= (uchar) MY_LEX_MINUS_OR_COMMENT; + state_map[(uchar)',']= (uchar) MY_LEX_COMMA; + state_map[(uchar)'?']= (uchar) MY_LEX_PLACEHOLDER; + + /* + Create a second map to make it faster to find identifiers + */ + for (i=0; i < 256 ; i++) + { + ident_map[i]= (uchar) (state_map[i] == MY_LEX_IDENT || + state_map[i] == MY_LEX_NUMBER_IDENT); + } + + /* Special handling of hex and binary strings */ + state_map[(uchar)'x']= state_map[(uchar)'X']= (uchar) MY_LEX_IDENT_OR_HEX; + state_map[(uchar)'b']= state_map[(uchar)'B']= (uchar) MY_LEX_IDENT_OR_BIN; + state_map[(uchar)'n']= state_map[(uchar)'N']= (uchar) MY_LEX_IDENT_OR_NCHAR; + return 0; +} + + +static MY_COLLATION_HANDLER *get_simple_collation_handler_by_flags(uint flags) +{ + return flags & MY_CS_BINSORT ? + (flags & MY_CS_NOPAD ? + &my_collation_8bit_nopad_bin_handler : + &my_collation_8bit_bin_handler) : + (flags & MY_CS_NOPAD ? + &my_collation_8bit_simple_nopad_ci_handler : + &my_collation_8bit_simple_ci_handler); +} + + +static void simple_cs_init_functions(struct charset_info_st *cs) +{ + cs->coll= get_simple_collation_handler_by_flags(cs->state); + cs->cset= &my_charset_8bit_handler; +} + + + +static int cs_copy_data(struct charset_info_st *to, CHARSET_INFO *from) +{ + to->number= from->number ? from->number : to->number; + + /* Don't replace csname if already set */ + if (from->cs_name.str && !to->cs_name.str) + { + if (!(to->cs_name.str= my_once_memdup(from->cs_name.str, + from->cs_name.length + 1, + MYF(MY_WME)))) + goto err; + to->cs_name.length= from->cs_name.length; + } + + if (from->coll_name.str) + { + if (!(to->coll_name.str= my_once_memdup(from->coll_name.str, + from->coll_name.length + 1, + MYF(MY_WME)))) + goto err; + to->coll_name.length= from->coll_name.length; + } + + if (from->comment) + if (!(to->comment= my_once_strdup(from->comment,MYF(MY_WME)))) + goto err; + + if (from->m_ctype) + { + if (!(to->m_ctype= (uchar*) my_once_memdup((char*) from->m_ctype, + MY_CS_CTYPE_TABLE_SIZE, + MYF(MY_WME)))) + goto err; + if (init_state_maps(to)) + goto err; + } + if (from->to_lower) + if (!(to->to_lower= (uchar*) my_once_memdup((char*) from->to_lower, + MY_CS_TO_LOWER_TABLE_SIZE, + MYF(MY_WME)))) + goto err; + + if (from->to_upper) + if (!(to->to_upper= (uchar*) my_once_memdup((char*) from->to_upper, + MY_CS_TO_UPPER_TABLE_SIZE, + MYF(MY_WME)))) + goto err; + if (from->sort_order) + { + if (!(to->sort_order= (uchar*) my_once_memdup((char*) from->sort_order, + MY_CS_SORT_ORDER_TABLE_SIZE, + MYF(MY_WME)))) + goto err; + + } + if (from->tab_to_uni) + { + uint sz= MY_CS_TO_UNI_TABLE_SIZE*sizeof(uint16); + if (!(to->tab_to_uni= (uint16*) my_once_memdup((char*)from->tab_to_uni, + sz, MYF(MY_WME)))) + goto err; + } + if (from->tailoring) + if (!(to->tailoring= my_once_strdup(from->tailoring,MYF(MY_WME)))) + goto err; + + return 0; + +err: + return 1; +} + + +static my_bool simple_8bit_charset_data_is_full(CHARSET_INFO *cs) +{ + return cs->m_ctype && cs->to_upper && cs->to_lower && cs->tab_to_uni; +} + + +/** + Inherit missing 8bit charset data from another collation. + Arrays pointed by refcs must be in the permanent memory already, + e.g. static memory, or allocated by my_once_xxx(). +*/ +static void +inherit_charset_data(struct charset_info_st *cs, CHARSET_INFO *refcs) +{ + if (!cs->to_upper) + cs->to_upper= refcs->to_upper; + if (!cs->to_lower) + cs->to_lower= refcs->to_lower; + if (!cs->m_ctype) + cs->m_ctype= refcs->m_ctype; + if (!cs->tab_to_uni) + cs->tab_to_uni= refcs->tab_to_uni; +} + + +static my_bool simple_8bit_collation_data_is_full(CHARSET_INFO *cs) +{ + return cs->sort_order || (cs->state & MY_CS_BINSORT); +} + + +/** + Inherit 8bit simple collation data from another collation. + refcs->sort_order must be in the permanent memory already, + e.g. static memory, or allocated by my_once_xxx(). +*/ +static void +inherit_collation_data(struct charset_info_st *cs, CHARSET_INFO *refcs) +{ + if (!simple_8bit_collation_data_is_full(cs)) + cs->sort_order= refcs->sort_order; +} + + +static my_bool simple_cs_is_full(CHARSET_INFO *cs) +{ + return cs->number && cs->cs_name.str && cs->coll_name.str && + simple_8bit_charset_data_is_full(cs) && + (simple_8bit_collation_data_is_full(cs) || cs->tailoring); +} + + +#if defined(HAVE_UCA_COLLATIONS) && (defined(HAVE_CHARSET_ucs2) || defined(HAVE_CHARSET_utf8mb3)) +/** + Initialize a loaded collation. + @param [OUT] to - The new charset_info_st structure to initialize. + @param [IN] from - A template collation, to fill the missing data from. + @param [IN] loaded - The collation data loaded from the LDML file. + some data may be missing in "loaded". +*/ +static void +copy_uca_collation(struct charset_info_st *to, CHARSET_INFO *from, + CHARSET_INFO *loaded) +{ + to->cset= from->cset; + to->coll= from->coll; + /* + Single-level UCA collation have strnxfrm_multiple=8. + In case of a multi-level UCA collation we use strnxfrm_multiply=4. + That means MY_COLLATION_HANDLER::strnfrmlen() will request the caller + to allocate a buffer smaller size for each level, for performance purpose, + and to fit longer VARCHARs to @@max_sort_length. + This makes filesort produce non-precise order for some rare Unicode + characters that produce more than 4 weights (long expansions). + UCA requires 2 bytes per weight multiplied by the number of levels. + In case of a 2-level collation, each character requires 4*2=8 bytes. + Therefore, the longest VARCHAR that fits into the default @@max_sort_length + is 1024/8=VARCHAR(128). With strnxfrm_multiply==8, only VARCHAR(64) + would fit. + Note, the built-in collation utf8_thai_520_w2 also uses strnxfrm_multiply=4, + for the same purpose. + TODO: we could add a new LDML syntax to choose strxfrm_multiply value. + */ + to->strxfrm_multiply= loaded->levels_for_order > 1 ? + 4 : from->strxfrm_multiply; + to->min_sort_char= from->min_sort_char; + to->max_sort_char= from->max_sort_char; + to->mbminlen= from->mbminlen; + to->mbmaxlen= from->mbmaxlen; + to->state|= MY_CS_AVAILABLE | MY_CS_LOADED | + MY_CS_STRNXFRM | MY_CS_UNICODE; +} +#endif + + +static int add_collation(struct charset_info_st *cs) +{ + if (cs->coll_name.str && + (cs->number || + (cs->number=get_collation_number_internal(cs->coll_name.str))) && + cs->number < array_elements(all_charsets)) + { + struct charset_info_st *newcs; + if (!(newcs= (struct charset_info_st*) all_charsets[cs->number])) + { + if (!(all_charsets[cs->number]= newcs= + (struct charset_info_st*) my_once_alloc(sizeof(CHARSET_INFO),MYF(0)))) + return MY_XML_ERROR; + bzero(newcs,sizeof(CHARSET_INFO)); + } + else + { + /* Don't allow change of csname */ + if (newcs->cs_name.str && strcmp(newcs->cs_name.str, cs->cs_name.str)) + { + my_error(EE_DUPLICATE_CHARSET, MYF(ME_WARNING), + cs->number, cs->cs_name.str, newcs->cs_name.str); + /* + Continue parsing rest of Index.xml. We got an warning in the log + so the user can fix the wrong character set definition. + */ + return MY_XML_OK; + } + } + + if (cs->primary_number == cs->number) + cs->state |= MY_CS_PRIMARY; + + if (cs->binary_number == cs->number) + cs->state |= MY_CS_BINSORT; + + newcs->state|= cs->state; + + if (!(newcs->state & MY_CS_COMPILED)) + { + if (cs_copy_data(newcs,cs)) + return MY_XML_ERROR; + + newcs->levels_for_order= 1; + + if (!strcmp(cs->cs_name.str,"ucs2") ) + { +#if defined(HAVE_CHARSET_ucs2) && defined(HAVE_UCA_COLLATIONS) + copy_uca_collation(newcs, newcs->state & MY_CS_NOPAD ? + &my_charset_ucs2_unicode_nopad_ci : + &my_charset_ucs2_unicode_ci, + cs); + newcs->state|= MY_CS_AVAILABLE | MY_CS_LOADED | MY_CS_NONASCII; +#endif + } + else if (!strcmp(cs->cs_name.str, "utf8") || + !strcmp(cs->cs_name.str, "utf8mb3")) + { +#if defined (HAVE_CHARSET_utf8mb3) && defined(HAVE_UCA_COLLATIONS) + copy_uca_collation(newcs, newcs->state & MY_CS_NOPAD ? + &my_charset_utf8mb3_unicode_nopad_ci : + &my_charset_utf8mb3_unicode_ci, + cs); + newcs->m_ctype= my_charset_utf8mb3_unicode_ci.m_ctype; + if (init_state_maps(newcs)) + return MY_XML_ERROR; +#endif + } + else if (!strcmp(cs->cs_name.str, "utf8mb4")) + { +#if defined (HAVE_CHARSET_utf8mb4) && defined(HAVE_UCA_COLLATIONS) + copy_uca_collation(newcs, newcs->state & MY_CS_NOPAD ? + &my_charset_utf8mb4_unicode_nopad_ci : + &my_charset_utf8mb4_unicode_ci, + cs); + newcs->m_ctype= my_charset_utf8mb4_unicode_ci.m_ctype; + if (init_state_maps(newcs)) + return MY_XML_ERROR; + newcs->state|= MY_CS_AVAILABLE | MY_CS_LOADED; +#endif + } + else if (!strcmp(cs->cs_name.str, "utf16")) + { +#if defined (HAVE_CHARSET_utf16) && defined(HAVE_UCA_COLLATIONS) + copy_uca_collation(newcs, newcs->state & MY_CS_NOPAD ? + &my_charset_utf16_unicode_nopad_ci : + &my_charset_utf16_unicode_ci, + cs); + newcs->state|= MY_CS_AVAILABLE | MY_CS_LOADED | MY_CS_NONASCII; +#endif + } + else if (!strcmp(cs->cs_name.str, "utf32")) + { +#if defined (HAVE_CHARSET_utf32) && defined(HAVE_UCA_COLLATIONS) + copy_uca_collation(newcs, newcs->state & MY_CS_NOPAD ? + &my_charset_utf32_unicode_nopad_ci : + &my_charset_utf32_unicode_ci, + cs); + newcs->state|= MY_CS_AVAILABLE | MY_CS_LOADED | MY_CS_NONASCII; +#endif + } + else + { + simple_cs_init_functions(newcs); + newcs->mbminlen= 1; + newcs->mbmaxlen= 1; + newcs->strxfrm_multiply= 1; + if (simple_cs_is_full(newcs)) + { + newcs->state |= MY_CS_LOADED; + } + } + add_compiled_extra_collation(newcs); + } + else + { + /* + We need the below to make get_charset_name() + and get_charset_number() working even if a + character set has not been really incompiled. + The above functions are used for example + in error message compiler extra/comp_err.c. + If a character set was compiled, this information + will get lost and overwritten in add_compiled_collation(). + */ + newcs->number= cs->number; + if (cs->comment) + if (!(newcs->comment= my_once_strdup(cs->comment,MYF(MY_WME)))) + return MY_XML_ERROR; + if (cs->cs_name.str && ! newcs->cs_name.str) + { + if (!(newcs->cs_name.str= my_once_memdup(cs->cs_name.str, + cs->cs_name.length+1, + MYF(MY_WME)))) + return MY_XML_ERROR; + newcs->cs_name.length= cs->cs_name.length; + } + if (cs->coll_name.str) + { + if (!(newcs->coll_name.str= my_once_memdup(cs->coll_name.str, + cs->coll_name.length+1, + MYF(MY_WME)))) + return MY_XML_ERROR; + newcs->coll_name.length= cs->coll_name.length; + } + } + cs->number= 0; + cs->primary_number= 0; + cs->binary_number= 0; + cs->coll_name.str= 0; + cs->coll_name.length= 0; + cs->state= 0; + cs->sort_order= NULL; + cs->tailoring= NULL; + } + return MY_XML_OK; +} + + +/** + Report character set initialization errors and warnings. + Be silent by default: no warnings on the client side. +*/ +static void +default_reporter(enum loglevel level __attribute__ ((unused)), + const char *format __attribute__ ((unused)), + ...) +{ +} +my_error_reporter my_charset_error_reporter= default_reporter; + + +/** + Wrappers for memory functions my_malloc (and friends) + with C-compatbile API without extra "myf" argument. +*/ +static void * +my_once_alloc_c(size_t size) +{ return my_once_alloc(size, MYF(MY_WME)); } + + +static void * +my_malloc_c(size_t size) +{ return my_malloc(key_memory_charset_loader, size, MYF(MY_WME)); } + + +static void * +my_realloc_c(void *old, size_t size) +{ return my_realloc(key_memory_charset_loader, old, size, MYF(MY_WME|MY_ALLOW_ZERO_PTR)); } + + +/** + Initialize character set loader to use mysys memory management functions. + @param loader Loader to initialize +*/ +void +my_charset_loader_init_mysys(MY_CHARSET_LOADER *loader) +{ + loader->error[0]= '\0'; + loader->once_alloc= my_once_alloc_c; + loader->malloc= my_malloc_c; + loader->realloc= my_realloc_c; + loader->free= my_free; + loader->reporter= my_charset_error_reporter; + loader->add_collation= add_collation; +} + + +#define MY_MAX_ALLOWED_BUF 1024*1024 +#define MY_CHARSET_INDEX "Index.xml" + +const char *charsets_dir= NULL; + + +static my_bool +my_read_charset_file(MY_CHARSET_LOADER *loader, + const char *filename, + myf myflags) +{ + uchar *buf; + int fd; + size_t len, tmp_len; + MY_STAT stat_info; + + if (!my_stat(filename, &stat_info, MYF(myflags)) || + ((len= (uint)stat_info.st_size) > MY_MAX_ALLOWED_BUF) || + !(buf= (uchar*) my_malloc(key_memory_charset_loader,len,myflags))) + return TRUE; + + if ((fd= mysql_file_open(key_file_charset, filename, O_RDONLY, myflags)) < 0) + goto error; + tmp_len= mysql_file_read(fd, buf, len, myflags); + mysql_file_close(fd, myflags); + if (tmp_len != len) + goto error; + + if (my_parse_charset_xml(loader, (char *) buf, len)) + { + my_printf_error(EE_UNKNOWN_CHARSET, "Error while parsing '%s': %s\n", + MYF(0), filename, loader->error); + goto error; + } + + my_free(buf); + return FALSE; + +error: + my_free(buf); + return TRUE; +} + + +char *get_charsets_dir(char *buf) +{ + const char *sharedir= SHAREDIR; + char *res; + DBUG_ENTER("get_charsets_dir"); + + if (charsets_dir != NULL) + strmake(buf, charsets_dir, FN_REFLEN-1); + else + { + if (test_if_hard_path(sharedir) || + is_prefix(sharedir, DEFAULT_CHARSET_HOME)) + strxmov(buf, sharedir, "/", CHARSET_DIR, NullS); + else + strxmov(buf, DEFAULT_CHARSET_HOME, "/", sharedir, "/", CHARSET_DIR, + NullS); + } + res= convert_dirname(buf,buf,NullS); + DBUG_PRINT("info",("charsets dir: '%s'", buf)); + DBUG_RETURN(res); +} + +CHARSET_INFO *all_charsets[MY_ALL_CHARSETS_SIZE]={NULL}; +CHARSET_INFO *default_charset_info = &my_charset_latin1; + + +/* + Add standard character set compiled into the application + All related character sets should share same cname +*/ + +void add_compiled_collation(struct charset_info_st *cs) +{ + DBUG_ASSERT(cs->number < array_elements(all_charsets)); + all_charsets[cs->number]= cs; + cs->state|= MY_CS_AVAILABLE; + if ((my_hash_insert(&charset_name_hash, (uchar*) cs))) + { +#ifndef DBUG_OFF + CHARSET_INFO *org= (CHARSET_INFO*) my_hash_search(&charset_name_hash, + (uchar*) cs->cs_name.str, + cs->cs_name.length); + DBUG_ASSERT(org); + DBUG_ASSERT(org->cs_name.str == cs->cs_name.str); + DBUG_ASSERT(org->cs_name.length == strlen(cs->cs_name.str)); +#endif + } +} + + +/* + Add optional characters sets from ctype-extra.c + + If cname is already in use, replace csname in new object with a pointer to + the already used csname to ensure that all csname's points to the same string + for the same character set. +*/ + + +void add_compiled_extra_collation(struct charset_info_st *cs) +{ + DBUG_ASSERT(cs->number < array_elements(all_charsets)); + all_charsets[cs->number]= cs; + cs->state|= MY_CS_AVAILABLE; + if ((my_hash_insert(&charset_name_hash, (uchar*) cs))) + { + CHARSET_INFO *org= (CHARSET_INFO*) my_hash_search(&charset_name_hash, + (uchar*) cs->cs_name.str, + cs->cs_name.length); + cs->cs_name= org->cs_name; + } +} + + + +static my_pthread_once_t charsets_initialized= MY_PTHREAD_ONCE_INIT; +static my_pthread_once_t charsets_template= MY_PTHREAD_ONCE_INIT; + +typedef struct +{ + ulonglong use_count; +} MY_COLLATION_STATISTICS; + + +static MY_COLLATION_STATISTICS my_collation_statistics[MY_ALL_CHARSETS_SIZE]; + + +my_bool my_collation_is_known_id(uint id) +{ + return id > 0 && id < array_elements(all_charsets) && all_charsets[id] ? + TRUE : FALSE; +} + + +/* + Collation use statistics functions do not lock + counters to avoid mutex contention. This can lose + some counter increments with high thread concurrency. + But this should be Ok, as we don't need exact numbers. +*/ +static inline void my_collation_statistics_inc_use_count(uint id) +{ + DBUG_ASSERT(my_collation_is_known_id(id)); + my_collation_statistics[id].use_count++; +} + + +ulonglong my_collation_statistics_get_use_count(uint id) +{ + DBUG_ASSERT(my_collation_is_known_id(id)); + return my_collation_statistics[id].use_count; +} + + +const char *my_collation_get_tailoring(uint id) +{ + /* all_charsets[id]->tailoring is never changed after server startup. */ + DBUG_ASSERT(my_collation_is_known_id(id)); + return all_charsets[id]->tailoring; +} + + +HASH charset_name_hash; + +static uchar *get_charset_key(const uchar *object, + size_t *size, + my_bool not_used __attribute__((unused))) +{ + CHARSET_INFO *cs= (CHARSET_INFO*) object; + *size= cs->cs_name.length; + return (uchar*) cs->cs_name.str; +} + +static void init_available_charsets(void) +{ + char fname[FN_REFLEN + sizeof(MY_CHARSET_INDEX)]; + struct charset_info_st **cs; + MY_CHARSET_LOADER loader; + DBUG_ENTER("init_available_charsets"); + + bzero((char*) &all_charsets,sizeof(all_charsets)); + bzero((char*) &my_collation_statistics, sizeof(my_collation_statistics)); + + my_hash_init2(key_memory_charsets, &charset_name_hash, 16, + &my_charset_latin1, 64, 0, 0, get_charset_key, + 0, 0, HASH_UNIQUE); + + init_compiled_charsets(MYF(0)); + + /* Copy compiled charsets */ + for (cs= (struct charset_info_st**) all_charsets; + cs < (struct charset_info_st**) all_charsets + + array_elements(all_charsets)-1 ; + cs++) + { + if (*cs) + { + DBUG_ASSERT(cs[0]->mbmaxlen <= MY_CS_MBMAXLEN); + if (cs[0]->m_ctype) + if (init_state_maps(*cs)) + *cs= NULL; + } + } + + my_charset_loader_init_mysys(&loader); + strmov(get_charsets_dir(fname), MY_CHARSET_INDEX); + my_read_charset_file(&loader, fname, MYF(0)); + DBUG_VOID_RETURN; +} + + +void free_charsets(void) +{ + charsets_initialized= charsets_template; + my_hash_free(&charset_name_hash); +} + + +static const char* +get_collation_name_alias(const char *name, char *buf, size_t bufsize, myf flags) +{ + if (!strncasecmp(name, "utf8_", 5)) + { + my_snprintf(buf, bufsize, "utf8mb%c_%s", + flags & MY_UTF8_IS_UTF8MB3 ? '3' : '4', name + 5); + return buf; + } + return NULL; +} + + +uint get_collation_number(const char *name, myf flags) +{ + uint id; + char alias[64]; + my_pthread_once(&charsets_initialized, init_available_charsets); + if ((id= get_collation_number_internal(name))) + return id; + if ((name= get_collation_name_alias(name, alias, sizeof(alias),flags))) + return get_collation_number_internal(name); + return 0; +} + + +static uint +get_charset_number_internal(const char *charset_name, uint cs_flags) +{ + CHARSET_INFO **cs; + + for (cs= all_charsets; + cs < all_charsets + array_elements(all_charsets); + cs++) + { + if ( cs[0] && cs[0]->cs_name.str && (cs[0]->state & cs_flags) && + !my_strcasecmp(&my_charset_latin1, cs[0]->cs_name.str, charset_name)) + return cs[0]->number; + } + return 0; +} + + +uint get_charset_number(const char *charset_name, uint cs_flags, myf flags) +{ + uint id; + const char *new_charset_name= flags & MY_UTF8_IS_UTF8MB3 ? "utf8mb3" : + "utf8mb4"; + my_pthread_once(&charsets_initialized, init_available_charsets); + if ((id= get_charset_number_internal(charset_name, cs_flags))) + return id; + if ((charset_name= !my_strcasecmp(&my_charset_latin1, charset_name, "utf8") ? + new_charset_name : NULL)) + return get_charset_number_internal(charset_name, cs_flags); + return 0; +} + + +const char *get_charset_name(uint charset_number) +{ + my_pthread_once(&charsets_initialized, init_available_charsets); + + if (charset_number < array_elements(all_charsets)) + { + CHARSET_INFO *cs= all_charsets[charset_number]; + + if (cs && (cs->number == charset_number) && cs->coll_name.str) + return cs->coll_name.str; + } + + return "?"; /* this mimics find_type() */ +} + + +static CHARSET_INFO *inheritance_source_by_id(CHARSET_INFO *cs, uint refid) +{ + CHARSET_INFO *refcs; + return refid && refid != cs->number && + (refcs= all_charsets[refid]) && + (refcs->state & MY_CS_AVAILABLE) ? refcs : NULL; +} + + +static CHARSET_INFO *find_collation_data_inheritance_source(CHARSET_INFO *cs, myf flags) +{ + const char *beg, *end; + if (cs->tailoring && + !strncmp(cs->tailoring, "[import ", 8) && + (end= strchr(cs->tailoring + 8, ']')) && + (beg= cs->tailoring + 8) + MY_CS_COLLATION_NAME_SIZE > end) + { + char name[MY_CS_COLLATION_NAME_SIZE + 1]; + memcpy(name, beg, end - beg); + name[end - beg]= '\0'; + return inheritance_source_by_id(cs, get_collation_number(name,MYF(flags))); + } + return NULL; +} + + +static CHARSET_INFO *find_charset_data_inheritance_source(CHARSET_INFO *cs) +{ + uint refid= get_charset_number_internal(cs->cs_name.str, MY_CS_PRIMARY); + return inheritance_source_by_id(cs, refid); +} + + +static CHARSET_INFO * +get_internal_charset(MY_CHARSET_LOADER *loader, uint cs_number, myf flags) +{ + char buf[FN_REFLEN]; + struct charset_info_st *cs; + + DBUG_ASSERT(cs_number < array_elements(all_charsets)); + + if ((cs= (struct charset_info_st*) all_charsets[cs_number])) + { + if (cs->state & MY_CS_READY) /* if CS is already initialized */ + { + my_collation_statistics_inc_use_count(cs_number); + return cs; + } + + /* + To make things thread safe we are not allowing other threads to interfere + while we may changing the cs_info_table + */ + mysql_mutex_lock(&THR_LOCK_charset); + + if (!(cs->state & (MY_CS_COMPILED|MY_CS_LOADED))) /* if CS is not in memory */ + { + MY_CHARSET_LOADER loader; + strxmov(get_charsets_dir(buf), cs->cs_name.str, ".xml", NullS); + my_charset_loader_init_mysys(&loader); + my_read_charset_file(&loader, buf, flags); + } + + if (cs->state & MY_CS_AVAILABLE) + { + if (!(cs->state & MY_CS_READY)) + { + if (!simple_8bit_charset_data_is_full(cs)) + { + CHARSET_INFO *refcs= find_charset_data_inheritance_source(cs); + if (refcs) + inherit_charset_data(cs, refcs); + } + if (!simple_8bit_collation_data_is_full(cs)) + { + CHARSET_INFO *refcl= find_collation_data_inheritance_source(cs, flags); + if (refcl) + inherit_collation_data(cs, refcl); + } + + if (my_ci_init_charset(cs, loader) || + my_ci_init_collation(cs, loader)) + { + cs= NULL; + } + else + cs->state|= MY_CS_READY; + } + my_collation_statistics_inc_use_count(cs_number); + } + else + cs= NULL; + + mysql_mutex_unlock(&THR_LOCK_charset); + } + return cs; +} + + +CHARSET_INFO *get_charset(uint cs_number, myf flags) +{ + CHARSET_INFO *cs= NULL; + + if (cs_number == default_charset_info->number) + return default_charset_info; + + my_pthread_once(&charsets_initialized, init_available_charsets); + + if (cs_number < array_elements(all_charsets)) + { + MY_CHARSET_LOADER loader; + my_charset_loader_init_mysys(&loader); + cs= get_internal_charset(&loader, cs_number, flags); + } + + if (!cs && (flags & MY_WME)) + { + char index_file[FN_REFLEN + sizeof(MY_CHARSET_INDEX)], cs_string[23]; + strmov(get_charsets_dir(index_file),MY_CHARSET_INDEX); + cs_string[0]='#'; + int10_to_str(cs_number, cs_string+1, 10); + my_error(EE_UNKNOWN_CHARSET, MYF(ME_BELL), cs_string, index_file); + } + return cs; +} + + +/** + Find collation by name: extended version of get_charset_by_name() + to return error messages to the caller. + @param loader Character set loader + @param name Collation name + @param flags Flags + @return NULL on error, pointer to collation on success +*/ + +CHARSET_INFO * +my_collation_get_by_name(MY_CHARSET_LOADER *loader, + const char *name, myf flags) +{ + uint cs_number; + CHARSET_INFO *cs; + my_pthread_once(&charsets_initialized, init_available_charsets); + + cs_number= get_collation_number(name,flags); + my_charset_loader_init_mysys(loader); + cs= cs_number ? get_internal_charset(loader, cs_number, flags) : NULL; + + if (!cs && (flags & MY_WME)) + { + char index_file[FN_REFLEN + sizeof(MY_CHARSET_INDEX)]; + strmov(get_charsets_dir(index_file),MY_CHARSET_INDEX); + my_error(EE_UNKNOWN_COLLATION, MYF(ME_BELL), name, index_file); + } + return cs; +} + + +CHARSET_INFO *get_charset_by_name(const char *cs_name, myf flags) +{ + MY_CHARSET_LOADER loader; + my_charset_loader_init_mysys(&loader); + return my_collation_get_by_name(&loader, cs_name, flags); +} + + +/** + Find character set by name: extended version of get_charset_by_csname() + to return error messages to the caller. + @param loader Character set loader + @param name Collation name + @param cs_flags Character set flags (e.g. default or binary collation) + @param flags Flags + @return NULL on error, pointer to collation on success +*/ +CHARSET_INFO * +my_charset_get_by_name(MY_CHARSET_LOADER *loader, + const char *cs_name, uint cs_flags, myf flags) +{ + uint cs_number; + CHARSET_INFO *cs; + DBUG_ENTER("get_charset_by_csname"); + DBUG_PRINT("enter",("name: '%s'", cs_name)); + + my_pthread_once(&charsets_initialized, init_available_charsets); + + cs_number= get_charset_number(cs_name, cs_flags, flags); + cs= cs_number ? get_internal_charset(loader, cs_number, flags) : NULL; + + if (!cs && (flags & MY_WME)) + { + char index_file[FN_REFLEN + sizeof(MY_CHARSET_INDEX)]; + strmov(get_charsets_dir(index_file),MY_CHARSET_INDEX); + my_error(EE_UNKNOWN_CHARSET, MYF(ME_BELL), cs_name, index_file); + } + + DBUG_RETURN(cs); +} + + +CHARSET_INFO * +get_charset_by_csname(const char *cs_name, uint cs_flags, myf flags) +{ + MY_CHARSET_LOADER loader; + my_charset_loader_init_mysys(&loader); + return my_charset_get_by_name(&loader, cs_name, cs_flags, flags); +} + + +/** + Resolve character set by the character set name (utf8, latin1, ...). + + The function tries to resolve character set by the specified name. If + there is character set with the given name, it is assigned to the "cs" + parameter and FALSE is returned. If there is no such character set, + "default_cs" is assigned to the "cs" and TRUE is returned. + + @param[in] cs_name Character set name. + @param[in] default_cs Default character set. + @param[out] cs Variable to store character set. + + @return FALSE if character set was resolved successfully; TRUE if there + is no character set with given name. +*/ + +my_bool resolve_charset(const char *cs_name, + CHARSET_INFO *default_cs, + CHARSET_INFO **cs, + myf flags) +{ + *cs= get_charset_by_csname(cs_name, MY_CS_PRIMARY, flags); + + if (*cs == NULL) + { + *cs= default_cs; + return TRUE; + } + + return FALSE; +} + + +/** + Resolve collation by the collation name (utf8_general_ci, ...). + + The function tries to resolve collation by the specified name. If there + is collation with the given name, it is assigned to the "cl" parameter + and FALSE is returned. If there is no such collation, "default_cl" is + assigned to the "cl" and TRUE is returned. + + @param[out] cl Variable to store collation. + @param[in] cl_name Collation name. + @param[in] default_cl Default collation. + + @return FALSE if collation was resolved successfully; TRUE if there is no + collation with given name. +*/ + +my_bool resolve_collation(const char *cl_name, + CHARSET_INFO *default_cl, + CHARSET_INFO **cl, + myf my_flags) +{ + *cl= get_charset_by_name(cl_name, my_flags); + + if (*cl == NULL) + { + *cl= default_cl; + return TRUE; + } + + return FALSE; +} + + +/* + Escape string with backslashes (\) + + SYNOPSIS + escape_string_for_mysql() + charset_info Charset of the strings + to Buffer for escaped string + to_length Length of destination buffer, or 0 + from The string to escape + length The length of the string to escape + overflow Set to 1 if the escaped string did not fit in + the to buffer + + DESCRIPTION + This escapes the contents of a string by adding backslashes before special + characters, and turning others into specific escape sequences, such as + turning newlines into \n and null bytes into \0. + + NOTE + To maintain compatibility with the old C API, to_length may be 0 to mean + "big enough" + + RETURN VALUES + # The length of the escaped string +*/ + +size_t escape_string_for_mysql(CHARSET_INFO *charset_info, + char *to, size_t to_length, + const char *from, size_t length, + my_bool *overflow) +{ + const char *to_start= to; + const char *end, *to_end=to_start + (to_length ? to_length-1 : 2*length); + *overflow= FALSE; + for (end= from + length; from < end; from++) + { + char escape= 0; +#ifdef USE_MB + int tmp_length= my_ci_charlen(charset_info, (const uchar *) from, (const uchar *) end); + if (tmp_length > 1) + { + if (to + tmp_length > to_end) + { + *overflow= TRUE; + break; + } + while (tmp_length--) + *to++= *from++; + from--; + continue; + } + /* + If the next character appears to begin a multi-byte character, we + escape that first byte of that apparent multi-byte character. (The + character just looks like a multi-byte character -- if it were actually + a multi-byte character, it would have been passed through in the test + above.) + + Without this check, we can create a problem by converting an invalid + multi-byte character into a valid one. For example, 0xbf27 is not + a valid GBK character, but 0xbf5c is. (0x27 = ', 0x5c = \) + */ + if (tmp_length < 1) /* Bad byte sequence */ + escape= *from; + else +#endif + switch (*from) { + case 0: /* Must be escaped for 'mysql' */ + escape= '0'; + break; + case '\n': /* Must be escaped for logs */ + escape= 'n'; + break; + case '\r': + escape= 'r'; + break; + case '\\': + escape= '\\'; + break; + case '\'': + escape= '\''; + break; + case '"': /* Better safe than sorry */ + escape= '"'; + break; + case '\032': /* This gives problems on Win32 */ + escape= 'Z'; + break; + } + if (escape) + { + if (to + 2 > to_end) + { + *overflow= TRUE; + break; + } + *to++= '\\'; + *to++= escape; + } + else + { + if (to + 1 > to_end) + { + *overflow= TRUE; + break; + } + *to++= *from; + } + } + *to= 0; + return (size_t) (to - to_start); +} + + +#ifdef BACKSLASH_MBTAIL +CHARSET_INFO *fs_character_set() +{ + static CHARSET_INFO *fs_cset_cache; + if (fs_cset_cache) + return fs_cset_cache; +#ifdef HAVE_CHARSET_cp932 + else if (GetACP() == 932) + return fs_cset_cache= &my_charset_cp932_japanese_ci; +#endif + else + return fs_cset_cache= &my_charset_bin; +} +#endif + +/* + Escape apostrophes by doubling them up + + SYNOPSIS + escape_quotes_for_mysql() + charset_info Charset of the strings + to Buffer for escaped string + to_length Length of destination buffer, or 0 + from The string to escape + length The length of the string to escape + overflow Set to 1 if the buffer overflows + + DESCRIPTION + This escapes the contents of a string by doubling up any apostrophes that + it contains. This is used when the NO_BACKSLASH_ESCAPES SQL_MODE is in + effect on the server. + + NOTE + To be consistent with escape_string_for_mysql(), to_length may be 0 to + mean "big enough" + + RETURN VALUES + The length of the escaped string +*/ + +size_t escape_quotes_for_mysql(CHARSET_INFO *charset_info, + char *to, size_t to_length, + const char *from, size_t length, + my_bool *overflow) +{ + const char *to_start= to; + const char *end, *to_end=to_start + (to_length ? to_length-1 : 2*length); +#ifdef USE_MB + my_bool use_mb_flag= my_ci_use_mb(charset_info); +#endif + *overflow= FALSE; + for (end= from + length; from < end; from++) + { +#ifdef USE_MB + int tmp_length; + if (use_mb_flag && (tmp_length= my_ismbchar(charset_info, from, end))) + { + if (to + tmp_length > to_end) + { + *overflow= TRUE; + break; + } + while (tmp_length--) + *to++= *from++; + from--; + continue; + } + /* + We don't have the same issue here with a non-multi-byte character being + turned into a multi-byte character by the addition of an escaping + character, because we are only escaping the ' character with itself. + */ +#endif + if (*from == '\'') + { + if (to + 2 > to_end) + { + *overflow= TRUE; + break; + } + *to++= '\''; + *to++= '\''; + } + else + { + if (to + 1 > to_end) + { + *overflow= TRUE; + break; + } + *to++= *from; + } + } + *to= 0; + return (size_t) (to - to_start); +} + + +typedef enum my_cs_match_type_enum +{ + /* MySQL and OS charsets are fully compatible */ + my_cs_exact, + /* MySQL charset is very close to OS charset */ + my_cs_approx, + /* + MySQL knows this charset, but it is not supported as client character set. + */ + my_cs_unsupp +} my_cs_match_type; + + +typedef struct str2str_st +{ + const char* os_name; + const char* my_name; + my_cs_match_type param; +} MY_CSET_OS_NAME; + +static const MY_CSET_OS_NAME charsets[] = +{ +#ifdef _WIN32 + {"cp437", "cp850", my_cs_approx}, + {"cp850", "cp850", my_cs_exact}, + {"cp852", "cp852", my_cs_exact}, + {"cp858", "cp850", my_cs_approx}, + {"cp866", "cp866", my_cs_exact}, + {"cp874", "tis620", my_cs_approx}, + {"cp932", "cp932", my_cs_exact}, + {"cp936", "gbk", my_cs_approx}, + {"cp949", "euckr", my_cs_approx}, + {"cp950", "big5", my_cs_exact}, + {"cp1200", "utf16le", my_cs_unsupp}, + {"cp1201", "utf16", my_cs_unsupp}, + {"cp1250", "cp1250", my_cs_exact}, + {"cp1251", "cp1251", my_cs_exact}, + {"cp1252", "latin1", my_cs_exact}, + {"cp1253", "greek", my_cs_exact}, + {"cp1254", "latin5", my_cs_exact}, + {"cp1255", "hebrew", my_cs_approx}, + {"cp1256", "cp1256", my_cs_exact}, + {"cp1257", "cp1257", my_cs_exact}, + {"cp10000", "macroman", my_cs_exact}, + {"cp10001", "sjis", my_cs_approx}, + {"cp10002", "big5", my_cs_approx}, + {"cp10008", "gb2312", my_cs_approx}, + {"cp10021", "tis620", my_cs_approx}, + {"cp10029", "macce", my_cs_exact}, + {"cp12001", "utf32", my_cs_unsupp}, + {"cp20107", "swe7", my_cs_exact}, + {"cp20127", "latin1", my_cs_approx}, + {"cp20866", "koi8r", my_cs_exact}, + {"cp20932", "ujis", my_cs_exact}, + {"cp20936", "gb2312", my_cs_approx}, + {"cp20949", "euckr", my_cs_approx}, + {"cp21866", "koi8u", my_cs_exact}, + {"cp28591", "latin1", my_cs_approx}, + {"cp28592", "latin2", my_cs_exact}, + {"cp28597", "greek", my_cs_exact}, + {"cp28598", "hebrew", my_cs_exact}, + {"cp28599", "latin5", my_cs_exact}, + {"cp28603", "latin7", my_cs_exact}, +#ifdef UNCOMMENT_THIS_WHEN_WL_4579_IS_DONE + {"cp28605", "latin9", my_cs_exact}, +#endif + {"cp38598", "hebrew", my_cs_exact}, + {"cp51932", "ujis", my_cs_exact}, + {"cp51936", "gb2312", my_cs_exact}, + {"cp51949", "euckr", my_cs_exact}, + {"cp51950", "big5", my_cs_exact}, +#ifdef UNCOMMENT_THIS_WHEN_WL_WL_4024_IS_DONE + {"cp54936", "gb18030", my_cs_exact}, +#endif + {"cp65001", "utf8mb4", my_cs_exact}, + {"cp65001", "utf8mb3", my_cs_approx}, +#else /* not Windows */ + + {"646", "latin1", my_cs_approx}, /* Default on Solaris */ + {"ANSI_X3.4-1968", "latin1", my_cs_approx}, + {"ansi1251", "cp1251", my_cs_exact}, + {"armscii8", "armscii8", my_cs_exact}, + {"armscii-8", "armscii8", my_cs_exact}, + {"ASCII", "latin1", my_cs_approx}, + {"Big5", "big5", my_cs_exact}, + {"cp1251", "cp1251", my_cs_exact}, + {"cp1255", "hebrew", my_cs_approx}, + {"CP866", "cp866", my_cs_exact}, + {"eucCN", "gb2312", my_cs_exact}, + {"euc-CN", "gb2312", my_cs_exact}, + {"eucJP", "ujis", my_cs_exact}, + {"euc-JP", "ujis", my_cs_exact}, + {"eucKR", "euckr", my_cs_exact}, + {"euc-KR", "euckr", my_cs_exact}, +#ifdef UNCOMMENT_THIS_WHEN_WL_WL_4024_IS_DONE + {"gb18030", "gb18030", my_cs_exact}, +#endif + {"gb2312", "gb2312", my_cs_exact}, + {"gbk", "gbk", my_cs_exact}, + {"georgianps", "geostd8", my_cs_exact}, + {"georgian-ps", "geostd8", my_cs_exact}, + {"IBM-1252", "cp1252", my_cs_exact}, + + {"iso88591", "latin1", my_cs_approx}, + {"ISO_8859-1", "latin1", my_cs_approx}, + {"ISO8859-1", "latin1", my_cs_approx}, + {"ISO-8859-1", "latin1", my_cs_approx}, + + {"iso885913", "latin7", my_cs_exact}, + {"ISO_8859-13", "latin7", my_cs_exact}, + {"ISO8859-13", "latin7", my_cs_exact}, + {"ISO-8859-13", "latin7", my_cs_exact}, + +#ifdef UNCOMMENT_THIS_WHEN_WL_4579_IS_DONE + {"iso885915", "latin9", my_cs_exact}, + {"ISO_8859-15", "latin9", my_cs_exact}, + {"ISO8859-15", "latin9", my_cs_exact}, + {"ISO-8859-15", "latin9", my_cs_exact}, +#endif + + {"iso88592", "latin2", my_cs_exact}, + {"ISO_8859-2", "latin2", my_cs_exact}, + {"ISO8859-2", "latin2", my_cs_exact}, + {"ISO-8859-2", "latin2", my_cs_exact}, + + {"iso88597", "greek", my_cs_exact}, + {"ISO_8859-7", "greek", my_cs_exact}, + {"ISO8859-7", "greek", my_cs_exact}, + {"ISO-8859-7", "greek", my_cs_exact}, + + {"iso88598", "hebrew", my_cs_exact}, + {"ISO_8859-8", "hebrew", my_cs_exact}, + {"ISO8859-8", "hebrew", my_cs_exact}, + {"ISO-8859-8", "hebrew", my_cs_exact}, + + {"iso88599", "latin5", my_cs_exact}, + {"ISO_8859-9", "latin5", my_cs_exact}, + {"ISO8859-9", "latin5", my_cs_exact}, + {"ISO-8859-9", "latin5", my_cs_exact}, + + {"koi8r", "koi8r", my_cs_exact}, + {"KOI8-R", "koi8r", my_cs_exact}, + {"koi8u", "koi8u", my_cs_exact}, + {"KOI8-U", "koi8u", my_cs_exact}, + + {"roman8", "hp8", my_cs_exact}, /* Default on HP UX */ + + {"Shift_JIS", "sjis", my_cs_exact}, + {"SJIS", "sjis", my_cs_exact}, + {"shiftjisx0213", "sjis", my_cs_exact}, + + {"tis620", "tis620", my_cs_exact}, + {"tis-620", "tis620", my_cs_exact}, + + {"ujis", "ujis", my_cs_exact}, + + {"US-ASCII", "latin1", my_cs_approx}, + + {"utf8", "utf8", my_cs_exact}, + {"utf-8", "utf8", my_cs_exact}, +#endif + {NULL, NULL, 0} +}; + + +static const char* +my_os_charset_to_mysql_charset(const char* csname) +{ + const MY_CSET_OS_NAME* csp; + for (csp = charsets; csp->os_name; csp++) + { + if (!strcasecmp(csp->os_name, csname)) + { + switch (csp->param) + { + case my_cs_exact: + return csp->my_name; + + case my_cs_approx: + /* + Maybe we should print a warning eventually: + character set correspondence is not exact. + */ + return csp->my_name; + + default: + return NULL; + } + } + } + return NULL; +} + +const char* my_default_csname() +{ + const char* csname = NULL; +#ifdef _WIN32 + char cpbuf[64]; + UINT cp; + if (GetACP() == CP_UTF8) + cp= CP_UTF8; + else + { + cp= GetConsoleCP(); + if (cp == 0) + cp= GetACP(); + } + snprintf(cpbuf, sizeof(cpbuf), "cp%d", (int)cp); + csname = my_os_charset_to_mysql_charset(cpbuf); +#elif defined(HAVE_SETLOCALE) && defined(HAVE_NL_LANGINFO) + if (setlocale(LC_CTYPE, "") && (csname = nl_langinfo(CODESET))) + csname = my_os_charset_to_mysql_charset(csname); +#endif + return csname ? csname : MYSQL_DEFAULT_CHARSET_NAME; +} + + +#ifdef _WIN32 +/** + Extract codepage number from "cpNNNN" string, + and check that this codepage is supported. + + @return 0 - invalid codepage(or unsupported) + > 0 - valid codepage number. +*/ +static UINT get_codepage(const char *s) +{ + UINT cp; + if (s[0] != 'c' || s[1] != 'p') + { + DBUG_ASSERT(0); + return 0; + } + cp= strtoul(s + 2, NULL, 10); + if (!IsValidCodePage(cp)) + { + /* + Can happen also with documented CP, i.e 51936 + Perhaps differs from one machine to another. + */ + return 0; + } + return cp; +} + +static UINT mysql_charset_to_codepage(const char *my_cs_name) +{ + const MY_CSET_OS_NAME *csp; + UINT cp=0,tmp; + for (csp= charsets; csp->os_name; csp++) + { + if (!strcasecmp(csp->my_name, my_cs_name)) + { + switch (csp->param) + { + case my_cs_exact: + tmp= get_codepage(csp->os_name); + if (tmp) + return tmp; + break; + case my_cs_approx: + /* + don't return just yet, perhaps there is a better + (exact) match later. + */ + if (!cp) + cp= get_codepage(csp->os_name); + continue; + + default: + return 0; + } + } + } + return cp; +} + +/** Set console codepage for MariaDB's charset name */ +int my_set_console_cp(const char *csname) +{ + UINT cp; + if (fileno(stdout) < 0 || !isatty(fileno(stdout))) + return 0; + cp= mysql_charset_to_codepage(csname); + if (!cp) + { + /* No compatible os charset.*/ + return -1; + } + + if (GetConsoleOutputCP() != cp && !SetConsoleOutputCP(cp)) + { + return -1; + } + + if (GetConsoleCP() != cp && !SetConsoleCP(cp)) + { + return -1; + } + return 0; +} +#endif |