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| version 1.7, 2008/06/27 17:36:30 | version 1.16, 2019/11/30 21:51:35 |
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| Line 3 | Line 3 |
| (c) Dmitry "Creator" Bobrik, 2004 | (c) Dmitry "Creator" Bobrik, 2004 |
| */ | */ |
| //static const char *RCSId="$Id$"; | |
| #include "config_includes.h" | #include "config_includes.h" |
| #include "pa_sql_driver.h" | #include "pa_sql_driver.h" |
| //#include "windows.h" // for messagebox | |
| volatile const char * IDENT_PARSER3SQLITE_C="$Id$" IDENT_PA_SQL_DRIVER_H; | |
| #define NO_CLIENT_LONG_LONG | #define NO_CLIENT_LONG_LONG |
| #include "sqlite3.h" | #include "sqlite3.h" |
| Line 54 struct Connection { | Line 54 struct Connection { |
| const char* client_charset; | const char* client_charset; |
| bool multi_statements; | bool multi_statements; |
| bool autocommit; | bool autocommit; |
| int busy_timeout; | |
| }; | }; |
| Line 78 public: | Line 79 public: |
| /** connect | /** connect |
| @param url | @param url |
| format: @b [localhost/]dbfile? | format: @b db-file|:memory:|temporary:? |
| autocommit=1& | autocommit=1& // =0 disable autocommit. in this case 1 connect == 1 transaction. |
| multi_statements=0& | // or you can use begin/commit|rollback explicitly |
| ClientCharset=UTF-8 | multi_statements=0& // =1 allow many statements in 1 query |
| ClientCharset=UTF-8 // will transcode to/from specified charset instead of UTF-8 (default for sqlite) | |
| */ | */ |
| void connect( | void connect( |
| char *url, | char *url, |
| Line 93 public: | Line 95 public: |
| *connection_ref=&connection; | *connection_ref=&connection; |
| connection.services=&services; | connection.services=&services; |
| connection.client_charset=SQLITE_DEFAULT_CHARSET; | connection.client_charset=SQLITE_DEFAULT_CHARSET; |
| connection.multi_statements=false; | connection.multi_statements=false; |
| connection.autocommit=true; | connection.autocommit=true; |
| connection.busy_timeout=4000; | |
| char* db_path=0; | char* db_path=0; |
| char* db=url; | char* db=url; |
| char* options=lsplit(db, '?'); | char* options=lsplit(db, '?'); |
| if(strcmp(db, ":memory:")==0){ // in-memory table | if(strcmp(db, ":memory:")==0){ // in-memory temporary DB |
| db_path=db; | db_path=db; |
| } else if(strcmp(db, ":temporary:")==0){ // on disk temporary table (in :memory: style) | } else if(strcmp(db, ":temporary:")==0){ // on-disk temporary DB |
| // do nothing: empty path mean temporary table on disk | // do nothing: empty path mean temporary table on disk |
| } else { // build path to DB-file from document_root (as anywhere in parser) | } else { |
| if(char* document_root=(char*)services.request_document_root()){ | char* document_root=(char*)services.request_document_root(); |
| db_path=(char*)services.malloc_atomic(strlen(document_root)+strlen(db)+1+1); | if(!document_root) // path to DB-file which was specified by user is path from document_root as anywhere in parser |
| db_path=strncpy(db_path, document_root, MAX_STRING); | services._throw("document_root is empty"); |
| db_path=strncat(db_path, "/", MAX_STRING); | |
| } else { | db_path=(char*)services.malloc_atomic(strlen(document_root)+1+strlen(db)+1); |
| // if document root empty -- build path from executable file | strcpy(db_path, document_root); |
| db_path=(char*)services.malloc_atomic(strlen(db)+2+1); | strcat(db_path, "/"); |
| db_path=strncpy(db_path, "./", MAX_STRING); | strcat(db_path, db); |
| } | |
| db_path=strncat(db_path, db, strlen(db)); | |
| } | } |
| //services._throw(db_path); | //services._throw(db_path); |
| Line 124 public: | Line 125 public: |
| if(char* key=lsplit(&options, '&')){ | if(char* key=lsplit(&options, '&')){ |
| if(*key) { | if(*key) { |
| if(char* value=lsplit(key, '=')){ | if(char* value=lsplit(key, '=')){ |
| if(strcasecmp(key, "multi_statements")==0) { | if(strcasecmp(key, "multi_statements")==0){ |
| if(atoi(value)!=0) | if(atoi(value)!=0) |
| connection.multi_statements=true; | connection.multi_statements=true; |
| } else if(strcasecmp(key, "busy_timeout")==0){ | |
| connection.busy_timeout=atoi(value); | |
| } else if(strcasecmp(key, "autocommit")==0){ | } else if(strcasecmp(key, "autocommit")==0){ |
| if(atoi(value)==0) | if(atoi(value)==0) |
| connection.autocommit=false; | connection.autocommit=false; |
| continue; | } else if(strcmp(key, "ClientCharset")==0){ |
| } else if(strcmp(key, "ClientCharset")==0){ // transcoding with parser. | |
| // by default we always transcode to UTF-8 (sqlite default) | |
| // so use this option only if you already stored data in your sqlite DB | |
| // in wrong encoding (1251 for ex.) | |
| toupper_str(value, value, strlen(value)); | toupper_str(value, value, strlen(value)); |
| connection.client_charset=value; | connection.client_charset=value; |
| continue; | |
| } else | } else |
| services._throw("unknown connect option" /*key*/); | services._throw("unknown connect option" /*key*/); |
| } else | } else |
| Line 164 public: | Line 162 public: |
| _throw(connection, error_msg); | _throw(connection, error_msg); |
| } | } |
| sqlite3_busy_timeout(connection.handle, connection.busy_timeout); | |
| _begin_transaction(connection); | _begin_transaction(connection); |
| } | } |
| Line 193 public: | Line 193 public: |
| return true; // not needed | return true; // not needed |
| } | } |
| const char* quote(void *aconnection, const char *from, unsigned int length){ | // charset here is services.request_charset(), not connection.client_charset |
| // thus we can't use the sql server quoting support | |
| const char* quote(void *aconnection, const char *str, unsigned int length) | |
| { | |
| const char* from; | |
| const char* from_end=str+length; | |
| size_t quoted=0; | |
| for(from=str; from<from_end; from++){ | |
| if(*from=='\'') | |
| quoted++; | |
| } | |
| if(!quoted) | |
| return str; | |
| Connection& connection=*static_cast<Connection*>(aconnection); | Connection& connection=*static_cast<Connection*>(aconnection); |
| /* | char *result=(char*)connection.services->malloc_atomic(length + quoted + 1); |
| You must allocate the to buffer to be at least length*2+1 bytes long. | char *to = result; |
| In the worse case, each character may need to be encoded as using two bytes, | |
| and you need room for the terminating null byte. | for(from=str; from<from_end; from++){ |
| */ | if(*from=='\'') |
| char *result=(char*)connection.services->malloc_atomic(length*2+1); | *to++= '\''; // ' -> '' |
| char *to=result; | *to++=*from; |
| while(length--) { | |
| if(*from=='\'') { // ' -> '' | |
| *to++='\''; | |
| } else if(*from=='\"') { // " -> "" | |
| *to++='\"'; | |
| } | |
| *to++=*from++; | |
| } | } |
| *to=0; | *to=0; |
| return result; | return result; |
| } | } |
| Line 226 public: | Line 236 public: |
| if(placeholders_count>0) | if(placeholders_count>0) |
| services._throw("bind variables not supported yet"); | services._throw("bind variables not supported yet"); |
| const char* request_charset=services.request_charset(); | |
| const char* client_charset=connection.client_charset; | |
| bool transcode_needed=_transcode_required(connection); | bool transcode_needed=_transcode_required(connection); |
| // transcode query from $request:charset to ?ClientCharset | // transcode query from $request:charset to ?ClientCharset |
| Line 234 public: | Line 246 public: |
| size_t length=strlen(astatement); | size_t length=strlen(astatement); |
| services.transcode(astatement, length, | services.transcode(astatement, length, |
| astatement, length, | astatement, length, |
| services.request_charset(), | request_charset, |
| connection.client_charset); | client_charset); |
| } | } |
| const char *statement; | const char *statement; |
| Line 248 public: | Line 260 public: |
| cur+=statement_size; | cur+=statement_size; |
| cur+=sprintf(cur, " LIMIT "); | cur+=sprintf(cur, " LIMIT "); |
| if(offset) | if(offset) |
| cur+=snprintf(cur, MAX_NUMBER+1, "%u,", offset); | cur+=snprintf(cur, MAX_NUMBER+1, "%lu,", offset); |
| if(limit!=SQL_NO_LIMIT) | if(limit!=SQL_NO_LIMIT) |
| cur+=snprintf(cur, MAX_NUMBER, "%u", limit); | cur+=snprintf(cur, MAX_NUMBER, "%lu", limit); |
| statement=statement_limited; | statement=statement_limited; |
| } else | } else |
| statement=astatement; | statement=astatement; |
| Line 267 public: | Line 279 public: |
| rc=sqlite3_prepare(connection.handle, statement, -1, &SQL, &pzTail); | rc=sqlite3_prepare(connection.handle, statement, -1, &SQL, &pzTail); |
| next_statement_length=strlen(pzTail); | next_statement_length=strlen(pzTail); |
| if(rc!=SQLITE_OK){ | if(rc!=SQLITE_OK){ |
| sqlite3_free((char*)pzTail); | //sqlite3_free((char*)pzTail); |
| _throw(connection, sqlite3_errmsg(connection.handle)); | _throw(connection, sqlite3_errmsg(connection.handle)); |
| } | } |
| if(!connection.multi_statements && next_statement_length>0){ // multi statements was not allowed but pzTail point to not empty one | if(!connection.multi_statements && next_statement_length>0){ // multi statements was not allowed but pzTail point to not empty one |
| sqlite3_free((char*)pzTail); | //sqlite3_free((char*)pzTail); |
| _throw(connection, "multi statements are not allowed in this connection"); | _throw(connection, "multi statements are not allowed until option ?multi_statements=1 in connect string is specified."); |
| } | } |
| #define CHECK(afailed) if(afailed){ failed=true; goto cleanup; } | #define CHECK(afailed) if(afailed){ failed=true; goto cleanup; } |
| Line 293 public: | Line 305 public: |
| if(transcode_needed){ | if(transcode_needed){ |
| services.transcode(str, length, | services.transcode(str, length, |
| str, length, | str, length, |
| connection.client_charset, | client_charset, |
| services.request_charset()); | request_charset); |
| } | } |
| CHECK(handlers.add_column(sql_error, (const char*)str, length)); | CHECK(handlers.add_column(sql_error, (const char*)str, length)); |
| } | } |
| CHECK(handlers.before_rows(sql_error)); | CHECK(handlers.before_rows(sql_error)); |
| int column_type; | |
| const char *str; | const char *str; |
| size_t length=0; | size_t length=0; |
| Line 313 public: | Line 324 public: |
| for(int i=0; i<column_count; i++){ | for(int i=0; i<column_count; i++){ |
| // SQLite allow to get value of any type using sqlite3_column_text function | // SQLite allow to get value of any type using sqlite3_column_text function |
| column_type=sqlite3_column_type(SQL, i); | |
| bool transcode_value=false; | bool transcode_value=false; |
| int column_type=sqlite3_column_type(SQL, i); | |
| switch(column_type){ | switch(column_type){ |
| case SQLITE_NULL: | case SQLITE_NULL: |
| length=0; | length=0; |
| Line 325 public: | Line 336 public: |
| length=(size_t)sqlite3_column_bytes(SQL, i); | length=(size_t)sqlite3_column_bytes(SQL, i); |
| break; | break; |
| case SQLITE_TEXT: // for text transcoding can be required | case SQLITE_TEXT: // for text transcoding can be required |
| default: // anything else? | |
| transcode_value=transcode_needed; | transcode_value=transcode_needed; |
| case SQLITE_INTEGER: | case SQLITE_INTEGER: |
| case SQLITE_FLOAT: | case SQLITE_FLOAT: |
| default: // what else? may be for future purposes | |
| str=(const char*)sqlite3_column_text(SQL, i); | str=(const char*)sqlite3_column_text(SQL, i); |
| length=(size_t)sqlite3_column_bytes(SQL, i); | length=(size_t)sqlite3_column_bytes(SQL, i); |
| break; | break; |
| Line 336 public: | Line 347 public: |
| if(length){ | if(length){ |
| char* strm=(char*)services.malloc_atomic(length+1); | char* strm=(char*)services.malloc_atomic(length+1); |
| memcpy(strm, str, length+1); | memcpy(strm, str, length); |
| strm[length]=0; | |
| str=strm; | str=strm; |
| // transcode cell value from ?ClientCharset to $request:charset | |
| if(transcode_value){ | if(transcode_value){ |
| // transcode cell value from ?ClientCharset to $request:charset | |
| services.transcode(str, length, | services.transcode(str, length, |
| str, length, | str, length, |
| connection.client_charset, | client_charset, |
| services.request_charset()); | request_charset); |
| } | } |
| } else | } else |
| str=0; | str=0; |
| Line 414 private: // sqlite client library funcs | Line 426 private: // sqlite client library funcs |
| typedef int (*t_sqlite3_close)(sqlite3 *); t_sqlite3_close sqlite3_close; | typedef int (*t_sqlite3_close)(sqlite3 *); t_sqlite3_close sqlite3_close; |
| typedef int (*t_sqlite3_busy_timeout)(sqlite3*, int ms); t_sqlite3_busy_timeout sqlite3_busy_timeout; | |
| typedef int (*t_sqlite3_exec)(sqlite3*, const char *sql, sqlite3_callback, void *, char **errmsg); t_sqlite3_exec sqlite3_exec; | typedef int (*t_sqlite3_exec)(sqlite3*, const char *sql, sqlite3_callback, void *, char **errmsg); t_sqlite3_exec sqlite3_exec; |
| typedef void (*t_sqlite3_free)(char *z); t_sqlite3_free sqlite3_free; | typedef void (*t_sqlite3_free)(char *z); t_sqlite3_free sqlite3_free; |
| Line 442 private: // sqlite client library funcs | Line 456 private: // sqlite client library funcs |
| private: // sqlite client library funcs linking | private: // sqlite client library funcs linking |
| const char *dlink(const char *dlopen_file_spec) { | const char *dlink(const char *dlopen_file_spec) { |
| if(lt_dlinit()) | if(lt_dlinit()){ |
| return lt_dlerror(); | if(const char* result=lt_dlerror()) |
| lt_dlhandle handle=lt_dlopen(dlopen_file_spec); | return result; |
| if (!handle) { | return "can not prepare to dynamic loading"; |
| if(const char* result=lt_dlerror()) | } |
| return result; | |
| lt_dlhandle handle=lt_dlopen(dlopen_file_spec); | |
| if(!handle){ | |
| if(const char* result=lt_dlerror()) | |
| return result; | |
| return "can not open the dynamic link module"; | return "can not open the dynamic link module"; |
| } | } |
| Line 462 private: // sqlite client library funcs | Line 480 private: // sqlite client library funcs |
| DLINK(sqlite3_open); | DLINK(sqlite3_open); |
| DLINK(sqlite3_close); | DLINK(sqlite3_close); |
| DLINK(sqlite3_busy_timeout); | |
| DLINK(sqlite3_exec); | DLINK(sqlite3_exec); |
| DLINK(sqlite3_free); | DLINK(sqlite3_free); |
| DLINK(sqlite3_errmsg); | DLINK(sqlite3_errmsg); |