Annotation of sql/mysql/parser3mysql.C, revision 1.30
1.1 parser 1: /** @file
2: Parser MySQL driver.
3:
1.11 paf 4: Copyright(c) 2001, 2003 ArtLebedev Group (http://www.artlebedev.com)
1.1 parser 5:
1.7 paf 6: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 parser 7:
8: 2001.07.30 using MySQL 3.23.22b
1.3 paf 9:
10: 2001.11.06 numrows on "HP-UX istok1 B.11.00 A 9000/869 448594332 two-user license"
11: 3.23.42 & 4.0.0.alfa never worked, both subst & .sl version returned 0
1.1 parser 12: */
1.30 ! misha 13: static const char *RCSId="$Id: parser3mysql.C,v 1.29 2008-01-25 19:00:52 misha Exp $";
1.1 parser 14:
15: #include "config_includes.h"
16:
17: #include "pa_sql_driver.h"
18:
19: #define NO_CLIENT_LONG_LONG
20: #include "mysql.h"
21: #include "ltdl.h"
22:
23: #define MAX_STRING 0x400
24: #define MAX_NUMBER 20
25:
26: #if _MSC_VER
27: # define snprintf _snprintf
1.2 parser 28: # define strcasecmp _stricmp
1.1 parser 29: #endif
30:
31: static char *lsplit(char *string, char delim) {
32: if(string) {
33: char *v=strchr(string, delim);
34: if(v) {
35: *v=0;
36: return v+1;
37: }
38: }
39: return 0;
40: }
41:
1.2 parser 42: static char *lsplit(char **string_ref, char delim) {
43: char *result=*string_ref;
44: char *next=lsplit(*string_ref, delim);
45: *string_ref=next;
46: return result;
47: }
48:
1.26 paf 49: static char* rsplit(char* string, char delim) {
50: if(string) {
51: char* v=strrchr(string, delim);
52: if(v) {
53: *v=0;
54: return v+1;
55: }
56: }
57: return NULL;
58: }
59:
1.21 paf 60: static void toupper_str(char *out, const char *in, size_t size) {
1.19 paf 61: while(size--)
62: *out++=(char)toupper(*in++);
63: }
64:
1.14 paf 65: struct Connection {
1.16 paf 66: SQL_Driver_services* services;
1.15 paf 67:
1.14 paf 68: MYSQL* handle;
1.19 paf 69: const char* cstrClientCharset;
1.14 paf 70: bool autocommit;
71: };
72:
1.29 misha 73:
1.1 parser 74: /**
75: MySQL server driver
76: */
77: class MySQL_Driver : public SQL_Driver {
78: public:
79:
1.29 misha 80: MySQL_Driver() : SQL_Driver() {}
81:
82: ~MySQL_Driver() {
83: if(mysql_server_end)
84: mysql_server_end();
1.1 parser 85: }
86:
87: /// get api version
88: int api_version() { return SQL_DRIVER_API_VERSION; }
89: /// initialize driver by loading sql dynamic link library
1.4 paf 90: const char *initialize(char *dlopen_file_spec) {
1.1 parser 91: return dlopen_file_spec?
92: dlink(dlopen_file_spec):"client library column is empty";
93: }
94: /** connect
1.23 paf 95: @param url
1.2 parser 96: format: @b user:pass@host[:port]|[/unix/socket]/database?
97: charset=cp1251_koi8&
98: timeout=3&
99: compress=1&
100: named_pipe=1
1.1 parser 101: 3.23.22b
1.28 misha 102: Currently the only option for @b character_set_name is cp1251_koi8.
103: WARNING: must be used only to connect, for buffer doesn't live long
104: 4.1+ accept not only 'cp1251_koi8' but 'cp1251', 'utf8' and much more
105: it can be usable for transcoding using sql server
1.1 parser 106: */
107: void connect(
1.23 paf 108: char *url,
1.1 parser 109: SQL_Driver_services& services,
1.14 paf 110: void **connection_ref ///< output: Connection*
1.1 parser 111: ) {
1.23 paf 112: char *user=url;
1.26 paf 113: char *s=rsplit(user, '@');
1.1 parser 114: char *host=0;
115: char *unix_socket=0;
116: if(s && s[0]=='[') { // unix socket
117: unix_socket=1+s;
118: s=lsplit(unix_socket, ']');
119: } else { // IP
120: host=s;
121: }
122: char *db=lsplit(s, '/');
123: char *pwd=lsplit(user, ':');
124: char *error_pos=0;
125: char *port_cstr=lsplit(host, ':');
126: int port=port_cstr?strtol(port_cstr, &error_pos, 0):0;
1.2 parser 127: char *options=lsplit(db, '?');
128:
1.19 paf 129: char *cstrBackwardCompAskServerToTranscode=0;
1.1 parser 130:
1.18 paf 131: Connection& connection=*(Connection *)services.malloc(sizeof(Connection));
1.15 paf 132: connection.services=&services;
1.14 paf 133: connection.handle=mysql_init(NULL);
1.19 paf 134: connection.cstrClientCharset=0;
1.14 paf 135: connection.autocommit=true;
1.18 paf 136: *connection_ref=&connection;
1.2 parser 137:
138: while(options) {
139: if(char *key=lsplit(&options, '&')) {
140: if(*key) {
141: if(char *value=lsplit(key, '=')) {
1.19 paf 142: if(strcmp(key, "ClientCharset" ) == 0) {
1.21 paf 143: toupper_str(value, value, strlen(value));
1.19 paf 144: connection.cstrClientCharset=value;
145: } else if(strcasecmp(key, "charset")==0) { // left for backward compatibility, consider using ClientCharset
146: cstrBackwardCompAskServerToTranscode=value;
1.2 parser 147: } else if(strcasecmp(key, "timeout")==0) {
148: unsigned int timeout=(unsigned int)atoi(value);
1.14 paf 149: if(mysql_options(connection.handle, MYSQL_OPT_CONNECT_TIMEOUT, (const char *)&timeout)!=0)
150: services._throw(mysql_error(connection.handle));
1.2 parser 151: } else if(strcasecmp(key, "compress")==0) {
152: if(atoi(value))
1.14 paf 153: if(mysql_options(connection.handle, MYSQL_OPT_COMPRESS, 0)!=0)
154: services._throw(mysql_error(connection.handle));
1.2 parser 155: } else if(strcasecmp(key, "named_pipe")==0) {
156: if(atoi(value))
1.14 paf 157: if(mysql_options(connection.handle, MYSQL_OPT_NAMED_PIPE , 0)!=0)
158: services._throw(mysql_error(connection.handle));
159: } else if(strcasecmp(key, "autocommit")==0) {
160: if(atoi(value)==0) {
161: connection.autocommit=false;
162: }
1.2 parser 163: } else
164: services._throw("unknown connect option" /*key*/);
165: } else
166: services._throw("connect option without =value" /*key*/);
167: }
168: }
169: }
170:
1.28 misha 171: // if(connection.cstrClientCharset && cstrBackwardCompAskServerToTranscode)
172: // services._throw("use 'ClientCharset' option only, "
173: // "'charset' option is obsolete and should not be used with new 'ClientCharset' option");
1.19 paf 174:
1.14 paf 175: if(!mysql_real_connect(connection.handle,
1.30 ! misha 176: host, user, pwd, db, port?port:MYSQL_PORT, unix_socket, CLIENT_MULTI_RESULTS))
1.14 paf 177: services._throw(mysql_error(connection.handle));
1.1 parser 178:
1.19 paf 179: if(cstrBackwardCompAskServerToTranscode) {
1.1 parser 180: // set charset
1.28 misha 181: char statement[MAX_STRING]="set CHARACTER SET ";
1.19 paf 182: strncat(statement, cstrBackwardCompAskServerToTranscode, MAX_STRING);
1.1 parser 183:
1.15 paf 184: exec(connection, statement);
1.1 parser 185: }
186:
1.14 paf 187: if(!connection.autocommit)
1.15 paf 188: exec(connection, "set autocommit=0");
1.14 paf 189: }
190:
1.15 paf 191: void exec(Connection& connection, const char* statement) {
1.14 paf 192: if(mysql_query(connection.handle, statement))
1.15 paf 193: connection.services->_throw(mysql_error(connection.handle));
1.14 paf 194: (*mysql_store_result)(connection.handle); // throw out the result [don't need but must call]
1.1 parser 195: }
1.14 paf 196:
197: void disconnect(void *aconnection) {
198: Connection& connection=*static_cast<Connection*>(aconnection);
199:
200: mysql_close(connection.handle);
1.17 paf 201: connection.handle=0;
1.1 parser 202: }
1.15 paf 203: void commit(void *aconnection) {
1.22 paf 204: //_asm int 3;
1.14 paf 205: Connection& connection=*static_cast<Connection*>(aconnection);
1.1 parser 206:
1.14 paf 207: if(!connection.autocommit)
1.15 paf 208: exec(connection, "commit");
1.14 paf 209: }
1.15 paf 210: void rollback(void *aconnection) {
1.14 paf 211: Connection& connection=*static_cast<Connection*>(aconnection);
212:
213: if(!connection.autocommit)
1.15 paf 214: exec(connection, "rollback");
1.14 paf 215: }
216:
1.15 paf 217: bool ping(void *aconnection) {
1.14 paf 218: Connection& connection=*static_cast<Connection*>(aconnection);
219:
220: return mysql_ping(connection.handle)==0;
1.1 parser 221: }
222:
1.15 paf 223: const char* quote(void *aconnection, const char *from, unsigned int length) {
224: Connection& connection=*static_cast<Connection*>(aconnection);
1.1 parser 225: /*
226: 3.23.22b
227: You must allocate the to buffer to be at least length*2+1 bytes long.
228: (In the worse case, each character may need to be encoded as using two bytes,
229: and you need room for the terminating null byte.)
230: */
1.15 paf 231: char *result=(char*)connection.services->malloc_atomic(length*2+1);
1.13 paf 232: mysql_escape_string(result, from, length);
233: return result;
1.1 parser 234: }
1.24 paf 235: void query(void *aconnection,
236: const char *astatement,
237: size_t placeholders_count, Placeholder* placeholders,
238: unsigned long offset, unsigned long limit,
1.1 parser 239: SQL_Driver_query_event_handlers& handlers) {
1.14 paf 240: Connection& connection=*static_cast<Connection*>(aconnection);
1.15 paf 241: SQL_Driver_services& services=*connection.services;
1.20 paf 242: const char* cstrClientCharset=connection.cstrClientCharset;
1.1 parser 243: MYSQL_RES *res=NULL;
1.24 paf 244:
245: if(placeholders_count>0)
246: services._throw("bind variables not supported (yet)");
1.1 parser 247:
1.19 paf 248: // transcode from $request:charset to connect-string?client_charset
1.20 paf 249: if(cstrClientCharset) {
1.19 paf 250: size_t transcoded_statement_size;
251: services.transcode(astatement, strlen(astatement),
252: astatement, transcoded_statement_size,
253: services.request_charset(),
254: cstrClientCharset);
255: }
256:
1.1 parser 257: const char *statement;
258: if(offset || limit) {
259: size_t statement_size=strlen(astatement);
1.13 paf 260: char *statement_limited=(char *)services.malloc_atomic(
1.1 parser 261: statement_size+MAX_NUMBER*2+8/* limit #,#*/+1);
262: char *cur=statement_limited;
263: memcpy(cur, astatement, statement_size); cur+=statement_size;
264: cur+=sprintf(cur, " limit ");
265: if(offset)
266: cur+=snprintf(cur, MAX_NUMBER+1, "%u,", offset);
267: if(limit)
268: cur+=snprintf(cur, MAX_NUMBER, "%u", limit);
269: statement=statement_limited;
270: } else
271: statement=astatement;
272:
1.14 paf 273: if(mysql_query(connection.handle, statement))
274: services._throw(mysql_error(connection.handle));
275: if(!(res=mysql_store_result(connection.handle)) && mysql_field_count(connection.handle))
276: services._throw(mysql_error(connection.handle));
1.1 parser 277: if(!res) // empty result: insert|delete|update|...
278: return;
279:
280: int column_count=mysql_num_fields(res);
281: if(!column_count) // old client
1.14 paf 282: column_count=mysql_field_count(connection.handle);
1.1 parser 283:
284: if(!column_count) {
285: mysql_free_result(res);
286: services._throw("result contains no columns");
287: }
1.8 paf 288:
1.9 paf 289: bool failed=false;
290: SQL_Error sql_error;
291: #define CHECK(afailed) \
292: if(afailed) { \
293: failed=true; \
294: goto cleanup; \
295: }
296:
297: for(int i=0; i<column_count; i++){
1.12 paf 298: if(MYSQL_FIELD *field=mysql_fetch_field(res)) {
1.20 paf 299: size_t length=strlen(field->name);
300: char* strm=(char*)services.malloc_atomic(length+1);
301: memcpy(strm, field->name, length+1);
302: const char* str=strm;
1.19 paf 303:
304: // transcode to $request:charset from connect-string?client_charset
1.20 paf 305: if(cstrClientCharset) {
1.19 paf 306: services.transcode(str, length,
307: str, length,
308: cstrClientCharset,
309: services.request_charset());
310: }
311:
312: CHECK(handlers.add_column(sql_error, str, length));
1.12 paf 313: } else {
314: // seen some broken client,
315: // which reported "44" for column count of response to "select 2+2"
316: column_count=i;
317: break;
318: }
1.9 paf 319: }
1.1 parser 320:
1.9 paf 321: CHECK(handlers.before_rows(sql_error));
322:
323: while(MYSQL_ROW mysql_row=mysql_fetch_row(res)) {
324: CHECK(handlers.add_row(sql_error));
325: unsigned long *lengths=mysql_fetch_lengths(res);
326: for(int i=0; i<column_count; i++){
1.13 paf 327: size_t length=(size_t)lengths[i];
1.20 paf 328: const char* str;
1.13 paf 329: if(length) {
1.20 paf 330: char *strm=(char*)services.malloc_atomic(length+1);
331: memcpy(strm, mysql_row[i], length);
332: strm[length]=0;
333: str=strm;
1.19 paf 334:
335: // transcode to $request:charset from connect-string?client_charset
1.20 paf 336: if(cstrClientCharset)
1.19 paf 337: services.transcode(str, length,
338: str, length,
339: cstrClientCharset,
340: services.request_charset());
1.9 paf 341: } else
1.13 paf 342: str=0;
343: CHECK(handlers.add_row_cell(sql_error, str, length));
1.3 paf 344: }
1.9 paf 345: }
346: cleanup:
1.1 parser 347: mysql_free_result(res);
1.9 paf 348: if(failed)
349: services._throw(sql_error);
1.1 parser 350: }
351:
352: private: // mysql client library funcs
353:
354: typedef MYSQL* (STDCALL *t_mysql_init)(MYSQL *); t_mysql_init mysql_init;
355:
1.29 misha 356: typedef void (STDCALL *t_mysql_server_end)(); t_mysql_server_end mysql_server_end;
357:
1.2 parser 358: typedef int (STDCALL *t_mysql_options)(MYSQL *mysql, enum mysql_option option, const char *arg); t_mysql_options mysql_options;
359:
1.1 parser 360: typedef MYSQL_RES* (STDCALL *t_mysql_store_result)(MYSQL *); t_mysql_store_result mysql_store_result;
361:
362: typedef int (STDCALL *t_mysql_query)(MYSQL *, const char *q); t_mysql_query mysql_query;
363:
364: typedef char * (STDCALL *t_mysql_error)(MYSQL *); t_mysql_error mysql_error;
365: static char* STDCALL subst_mysql_error(MYSQL *mysql) { return (mysql)->net.last_error; }
366:
367: typedef MYSQL* (STDCALL *t_mysql_real_connect)(MYSQL *, const char *host,
368: const char *user,
369: const char *passwd,
370: const char *db,
371: unsigned int port,
372: const char *unix_socket,
373: unsigned int clientflag); t_mysql_real_connect mysql_real_connect;
374:
375: typedef void (STDCALL *t_mysql_close)(MYSQL *); t_mysql_close mysql_close;
376:
377: typedef int (STDCALL *t_mysql_ping)(MYSQL *); t_mysql_ping mysql_ping;
378:
379: typedef unsigned long (STDCALL *t_mysql_escape_string)(char *to,const char *from,
380: unsigned long from_length); t_mysql_escape_string mysql_escape_string;
381:
382: typedef void (STDCALL *t_mysql_free_result)(MYSQL_RES *result); t_mysql_free_result mysql_free_result;
383:
384: typedef unsigned long* (STDCALL *t_mysql_fetch_lengths)(MYSQL_RES *result); t_mysql_fetch_lengths mysql_fetch_lengths;
385:
386: typedef MYSQL_ROW (STDCALL *t_mysql_fetch_row)(MYSQL_RES *result); t_mysql_fetch_row mysql_fetch_row;
387:
388: typedef MYSQL_FIELD* (STDCALL *t_mysql_fetch_field)(MYSQL_RES *result); t_mysql_fetch_field mysql_fetch_field;
389:
390: typedef unsigned int (STDCALL *t_mysql_num_fields)(MYSQL_RES *); t_mysql_num_fields mysql_num_fields;
391: static unsigned int STDCALL subst_mysql_num_fields(MYSQL_RES *res) { return res->field_count; }
392:
393: typedef unsigned int (STDCALL *t_mysql_field_count)(MYSQL *); t_mysql_field_count mysql_field_count;
394: static unsigned int STDCALL subst_mysql_field_count(MYSQL *mysql) { return mysql->field_count; }
395:
396: private: // mysql client library funcs linking
397:
398: const char *dlink(const char *dlopen_file_spec) {
1.10 paf 399: if(lt_dlinit())
400: return lt_dlerror();
1.1 parser 401: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
1.25 paf 402: if (!handle) {
403: if(const char* result=lt_dlerror())
404: return result;
405:
1.1 parser 406: return "can not open the dynamic link module";
1.25 paf 407: }
1.1 parser 408:
1.29 misha 409: #define GLINK(name) \
410: name=(t_##name)lt_dlsym(handle, #name);
411:
1.1 parser 412: #define DSLINK(name, action) \
1.29 misha 413: GLINK(name) \
1.1 parser 414: if(!name) \
415: action;
416:
417: #define DLINK(name) DSLINK(name, return "function " #name " was not found")
418: #define SLINK(name) DSLINK(name, name=subst_##name)
419:
420: DLINK(mysql_init);
1.29 misha 421: GLINK(mysql_server_end);
1.2 parser 422: DLINK(mysql_options);
1.1 parser 423: DLINK(mysql_store_result);
424: DLINK(mysql_query);
425: SLINK(mysql_error);
426: DLINK(mysql_real_connect);
427: DLINK(mysql_close);
428: DLINK(mysql_ping);
429: DLINK(mysql_escape_string);
430: DLINK(mysql_free_result);
431: DLINK(mysql_fetch_lengths);
432: DLINK(mysql_fetch_row);
433: DLINK(mysql_fetch_field);
434: SLINK(mysql_num_fields);
435: SLINK(mysql_field_count);
436: return 0;
437: }
438:
439: };
440:
441: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
1.29 misha 442: static MySQL_Driver Driver;
443: return &Driver;
1.1 parser 444: }
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