Annotation of sql/mysql/parser3mysql.C, revision 1.26
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: */
1.26 ! paf 13: static const char *RCSId="$Id: parser3mysql.C,v 1.25 2004/07/28 14:32:05 paf 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:
1.1 parser 73: /**
74: MySQL server driver
75: */
76: class MySQL_Driver : public SQL_Driver {
77: public:
78:
79: MySQL_Driver() : SQL_Driver() {
80: }
81:
82: /// get api version
83: int api_version() { return SQL_DRIVER_API_VERSION; }
84: /// initialize driver by loading sql dynamic link library
1.4 paf 85: const char *initialize(char *dlopen_file_spec) {
1.1 parser 86: return dlopen_file_spec?
87: dlink(dlopen_file_spec):"client library column is empty";
88: }
89: /** connect
1.23 paf 90: @param url
1.2 parser 91: format: @b user:pass@host[:port]|[/unix/socket]/database?
92: charset=cp1251_koi8&
93: timeout=3&
94: compress=1&
95: named_pipe=1
1.1 parser 96: 3.23.22b
97: Currently the only option for @b character_set_name is cp1251_koi8.
98: WARNING: must be used only to connect, for buffer doesn't live long
99: */
100: void connect(
1.23 paf 101: char *url,
1.1 parser 102: SQL_Driver_services& services,
1.14 paf 103: void **connection_ref ///< output: Connection*
1.1 parser 104: ) {
1.23 paf 105: char *user=url;
1.26 ! paf 106: char *s=rsplit(user, '@');
1.1 parser 107: char *host=0;
108: char *unix_socket=0;
109: if(s && s[0]=='[') { // unix socket
110: unix_socket=1+s;
111: s=lsplit(unix_socket, ']');
112: } else { // IP
113: host=s;
114: }
115: char *db=lsplit(s, '/');
116: char *pwd=lsplit(user, ':');
117: char *error_pos=0;
118: char *port_cstr=lsplit(host, ':');
119: int port=port_cstr?strtol(port_cstr, &error_pos, 0):0;
1.2 parser 120: char *options=lsplit(db, '?');
121:
1.19 paf 122: char *cstrBackwardCompAskServerToTranscode=0;
1.1 parser 123:
1.18 paf 124: Connection& connection=*(Connection *)services.malloc(sizeof(Connection));
1.15 paf 125: connection.services=&services;
1.14 paf 126: connection.handle=mysql_init(NULL);
1.19 paf 127: connection.cstrClientCharset=0;
1.14 paf 128: connection.autocommit=true;
1.18 paf 129: *connection_ref=&connection;
1.2 parser 130:
131: while(options) {
132: if(char *key=lsplit(&options, '&')) {
133: if(*key) {
134: if(char *value=lsplit(key, '=')) {
1.19 paf 135: if(strcmp(key, "ClientCharset" ) == 0) {
1.21 paf 136: toupper_str(value, value, strlen(value));
1.19 paf 137: connection.cstrClientCharset=value;
138: } else if(strcasecmp(key, "charset")==0) { // left for backward compatibility, consider using ClientCharset
139: cstrBackwardCompAskServerToTranscode=value;
1.2 parser 140: } else if(strcasecmp(key, "timeout")==0) {
141: unsigned int timeout=(unsigned int)atoi(value);
1.14 paf 142: if(mysql_options(connection.handle, MYSQL_OPT_CONNECT_TIMEOUT, (const char *)&timeout)!=0)
143: services._throw(mysql_error(connection.handle));
1.2 parser 144: } else if(strcasecmp(key, "compress")==0) {
145: if(atoi(value))
1.14 paf 146: if(mysql_options(connection.handle, MYSQL_OPT_COMPRESS, 0)!=0)
147: services._throw(mysql_error(connection.handle));
1.2 parser 148: } else if(strcasecmp(key, "named_pipe")==0) {
149: if(atoi(value))
1.14 paf 150: if(mysql_options(connection.handle, MYSQL_OPT_NAMED_PIPE , 0)!=0)
151: services._throw(mysql_error(connection.handle));
152: } else if(strcasecmp(key, "autocommit")==0) {
153: if(atoi(value)==0) {
154: connection.autocommit=false;
155: }
1.2 parser 156: } else
157: services._throw("unknown connect option" /*key*/);
158: } else
159: services._throw("connect option without =value" /*key*/);
160: }
161: }
162: }
163:
1.19 paf 164: if(connection.cstrClientCharset && cstrBackwardCompAskServerToTranscode)
165: services._throw("use 'ClientCharset' option only, "
166: "'charset' option is obsolete and should not be used with new 'ClientCharset' option");
167:
1.14 paf 168: if(!mysql_real_connect(connection.handle,
1.1 parser 169: host, user, pwd, db, port?port:MYSQL_PORT, unix_socket, 0))
1.14 paf 170: services._throw(mysql_error(connection.handle));
1.1 parser 171:
1.19 paf 172: if(cstrBackwardCompAskServerToTranscode) {
1.1 parser 173: // set charset
174: char statement[MAX_STRING]="set CHARACTER SET "; // cp1251_koi8
1.19 paf 175: strncat(statement, cstrBackwardCompAskServerToTranscode, MAX_STRING);
1.1 parser 176:
1.15 paf 177: exec(connection, statement);
1.1 parser 178: }
179:
1.14 paf 180: if(!connection.autocommit)
1.15 paf 181: exec(connection, "set autocommit=0");
1.14 paf 182: }
183:
1.15 paf 184: void exec(Connection& connection, const char* statement) {
1.14 paf 185: if(mysql_query(connection.handle, statement))
1.15 paf 186: connection.services->_throw(mysql_error(connection.handle));
1.14 paf 187: (*mysql_store_result)(connection.handle); // throw out the result [don't need but must call]
1.1 parser 188: }
1.14 paf 189:
190: void disconnect(void *aconnection) {
191: Connection& connection=*static_cast<Connection*>(aconnection);
192:
193: mysql_close(connection.handle);
1.17 paf 194: connection.handle=0;
1.1 parser 195: }
1.15 paf 196: void commit(void *aconnection) {
1.22 paf 197: //_asm int 3;
1.14 paf 198: Connection& connection=*static_cast<Connection*>(aconnection);
1.1 parser 199:
1.14 paf 200: if(!connection.autocommit)
1.15 paf 201: exec(connection, "commit");
1.14 paf 202: }
1.15 paf 203: void rollback(void *aconnection) {
1.14 paf 204: Connection& connection=*static_cast<Connection*>(aconnection);
205:
206: if(!connection.autocommit)
1.15 paf 207: exec(connection, "rollback");
1.14 paf 208: }
209:
1.15 paf 210: bool ping(void *aconnection) {
1.14 paf 211: Connection& connection=*static_cast<Connection*>(aconnection);
212:
213: return mysql_ping(connection.handle)==0;
1.1 parser 214: }
215:
1.15 paf 216: const char* quote(void *aconnection, const char *from, unsigned int length) {
217: Connection& connection=*static_cast<Connection*>(aconnection);
1.1 parser 218: /*
219: 3.23.22b
220: You must allocate the to buffer to be at least length*2+1 bytes long.
221: (In the worse case, each character may need to be encoded as using two bytes,
222: and you need room for the terminating null byte.)
223: */
1.15 paf 224: char *result=(char*)connection.services->malloc_atomic(length*2+1);
1.13 paf 225: mysql_escape_string(result, from, length);
226: return result;
1.1 parser 227: }
1.24 paf 228: void query(void *aconnection,
229: const char *astatement,
230: size_t placeholders_count, Placeholder* placeholders,
231: unsigned long offset, unsigned long limit,
1.1 parser 232: SQL_Driver_query_event_handlers& handlers) {
1.14 paf 233: Connection& connection=*static_cast<Connection*>(aconnection);
1.15 paf 234: SQL_Driver_services& services=*connection.services;
1.20 paf 235: const char* cstrClientCharset=connection.cstrClientCharset;
1.1 parser 236: MYSQL_RES *res=NULL;
1.24 paf 237:
238: if(placeholders_count>0)
239: services._throw("bind variables not supported (yet)");
1.1 parser 240:
1.19 paf 241: // transcode from $request:charset to connect-string?client_charset
1.20 paf 242: if(cstrClientCharset) {
1.19 paf 243: size_t transcoded_statement_size;
244: services.transcode(astatement, strlen(astatement),
245: astatement, transcoded_statement_size,
246: services.request_charset(),
247: cstrClientCharset);
248: }
249:
1.1 parser 250: const char *statement;
251: if(offset || limit) {
252: size_t statement_size=strlen(astatement);
1.13 paf 253: char *statement_limited=(char *)services.malloc_atomic(
1.1 parser 254: statement_size+MAX_NUMBER*2+8/* limit #,#*/+1);
255: char *cur=statement_limited;
256: memcpy(cur, astatement, statement_size); cur+=statement_size;
257: cur+=sprintf(cur, " limit ");
258: if(offset)
259: cur+=snprintf(cur, MAX_NUMBER+1, "%u,", offset);
260: if(limit)
261: cur+=snprintf(cur, MAX_NUMBER, "%u", limit);
262: statement=statement_limited;
263: } else
264: statement=astatement;
265:
1.14 paf 266: if(mysql_query(connection.handle, statement))
267: services._throw(mysql_error(connection.handle));
268: if(!(res=mysql_store_result(connection.handle)) && mysql_field_count(connection.handle))
269: services._throw(mysql_error(connection.handle));
1.1 parser 270: if(!res) // empty result: insert|delete|update|...
271: return;
272:
273: int column_count=mysql_num_fields(res);
274: if(!column_count) // old client
1.14 paf 275: column_count=mysql_field_count(connection.handle);
1.1 parser 276:
277: if(!column_count) {
278: mysql_free_result(res);
279: services._throw("result contains no columns");
280: }
1.8 paf 281:
1.9 paf 282: bool failed=false;
283: SQL_Error sql_error;
284: #define CHECK(afailed) \
285: if(afailed) { \
286: failed=true; \
287: goto cleanup; \
288: }
289:
290: for(int i=0; i<column_count; i++){
1.12 paf 291: if(MYSQL_FIELD *field=mysql_fetch_field(res)) {
1.20 paf 292: size_t length=strlen(field->name);
293: char* strm=(char*)services.malloc_atomic(length+1);
294: memcpy(strm, field->name, length+1);
295: const char* str=strm;
1.19 paf 296:
297: // transcode to $request:charset from connect-string?client_charset
1.20 paf 298: if(cstrClientCharset) {
1.19 paf 299: services.transcode(str, length,
300: str, length,
301: cstrClientCharset,
302: services.request_charset());
303: }
304:
305: CHECK(handlers.add_column(sql_error, str, length));
1.12 paf 306: } else {
307: // seen some broken client,
308: // which reported "44" for column count of response to "select 2+2"
309: column_count=i;
310: break;
311: }
1.9 paf 312: }
1.1 parser 313:
1.9 paf 314: CHECK(handlers.before_rows(sql_error));
315:
316: while(MYSQL_ROW mysql_row=mysql_fetch_row(res)) {
317: CHECK(handlers.add_row(sql_error));
318: unsigned long *lengths=mysql_fetch_lengths(res);
319: for(int i=0; i<column_count; i++){
1.13 paf 320: size_t length=(size_t)lengths[i];
1.20 paf 321: const char* str;
1.13 paf 322: if(length) {
1.20 paf 323: char *strm=(char*)services.malloc_atomic(length+1);
324: memcpy(strm, mysql_row[i], length);
325: strm[length]=0;
326: str=strm;
1.19 paf 327:
328: // transcode to $request:charset from connect-string?client_charset
1.20 paf 329: if(cstrClientCharset)
1.19 paf 330: services.transcode(str, length,
331: str, length,
332: cstrClientCharset,
333: services.request_charset());
1.9 paf 334: } else
1.13 paf 335: str=0;
336: CHECK(handlers.add_row_cell(sql_error, str, length));
1.3 paf 337: }
1.9 paf 338: }
339: cleanup:
1.1 parser 340: mysql_free_result(res);
1.9 paf 341: if(failed)
342: services._throw(sql_error);
1.1 parser 343: }
344:
345: private: // mysql client library funcs
346:
347: typedef MYSQL* (STDCALL *t_mysql_init)(MYSQL *); t_mysql_init mysql_init;
348:
1.2 parser 349: typedef int (STDCALL *t_mysql_options)(MYSQL *mysql, enum mysql_option option, const char *arg); t_mysql_options mysql_options;
350:
1.1 parser 351: typedef MYSQL_RES* (STDCALL *t_mysql_store_result)(MYSQL *); t_mysql_store_result mysql_store_result;
352:
353: typedef int (STDCALL *t_mysql_query)(MYSQL *, const char *q); t_mysql_query mysql_query;
354:
355: typedef char * (STDCALL *t_mysql_error)(MYSQL *); t_mysql_error mysql_error;
356: static char* STDCALL subst_mysql_error(MYSQL *mysql) { return (mysql)->net.last_error; }
357:
358: typedef MYSQL* (STDCALL *t_mysql_real_connect)(MYSQL *, const char *host,
359: const char *user,
360: const char *passwd,
361: const char *db,
362: unsigned int port,
363: const char *unix_socket,
364: unsigned int clientflag); t_mysql_real_connect mysql_real_connect;
365:
366: typedef void (STDCALL *t_mysql_close)(MYSQL *); t_mysql_close mysql_close;
367:
368: typedef int (STDCALL *t_mysql_ping)(MYSQL *); t_mysql_ping mysql_ping;
369:
370: typedef unsigned long (STDCALL *t_mysql_escape_string)(char *to,const char *from,
371: unsigned long from_length); t_mysql_escape_string mysql_escape_string;
372:
373: typedef void (STDCALL *t_mysql_free_result)(MYSQL_RES *result); t_mysql_free_result mysql_free_result;
374:
375: typedef unsigned long* (STDCALL *t_mysql_fetch_lengths)(MYSQL_RES *result); t_mysql_fetch_lengths mysql_fetch_lengths;
376:
377: typedef MYSQL_ROW (STDCALL *t_mysql_fetch_row)(MYSQL_RES *result); t_mysql_fetch_row mysql_fetch_row;
378:
379: typedef MYSQL_FIELD* (STDCALL *t_mysql_fetch_field)(MYSQL_RES *result); t_mysql_fetch_field mysql_fetch_field;
380:
381: typedef unsigned int (STDCALL *t_mysql_num_fields)(MYSQL_RES *); t_mysql_num_fields mysql_num_fields;
382: static unsigned int STDCALL subst_mysql_num_fields(MYSQL_RES *res) { return res->field_count; }
383:
384: typedef unsigned int (STDCALL *t_mysql_field_count)(MYSQL *); t_mysql_field_count mysql_field_count;
385: static unsigned int STDCALL subst_mysql_field_count(MYSQL *mysql) { return mysql->field_count; }
386:
387: private: // mysql client library funcs linking
388:
389: const char *dlink(const char *dlopen_file_spec) {
1.10 paf 390: if(lt_dlinit())
391: return lt_dlerror();
1.1 parser 392: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
1.25 paf 393: if (!handle) {
394: if(const char* result=lt_dlerror())
395: return result;
396:
1.1 parser 397: return "can not open the dynamic link module";
1.25 paf 398: }
1.1 parser 399:
400: #define DSLINK(name, action) \
401: name=(t_##name)lt_dlsym(handle, #name); \
402: if(!name) \
403: action;
404:
405: #define DLINK(name) DSLINK(name, return "function " #name " was not found")
406: #define SLINK(name) DSLINK(name, name=subst_##name)
407:
408: DLINK(mysql_init);
1.2 parser 409: DLINK(mysql_options);
1.1 parser 410: DLINK(mysql_store_result);
411: DLINK(mysql_query);
412: SLINK(mysql_error);
413: DLINK(mysql_real_connect);
414: DLINK(mysql_close);
415: DLINK(mysql_ping);
416: DLINK(mysql_escape_string);
417: DLINK(mysql_free_result);
418: DLINK(mysql_fetch_lengths);
419: DLINK(mysql_fetch_row);
420: DLINK(mysql_fetch_field);
421: SLINK(mysql_num_fields);
422: SLINK(mysql_field_count);
423: return 0;
424: }
425:
426: };
427:
428: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
429: return new MySQL_Driver();
430: }
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