Annotation of sql/mysql/parser3mysql.C, revision 1.21
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: */
1.21 ! paf 13: static const char *RCSId="$Id: parser3mysql.C,v 1.19.2.2 2004/03/26 14:39:14 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:
1.21 ! paf 49: static void toupper_str(char *out, const char *in, size_t size) {
1.19 paf 50: while(size--)
51: *out++=(char)toupper(*in++);
52: }
53:
1.14 paf 54: struct Connection {
1.16 paf 55: SQL_Driver_services* services;
1.15 paf 56:
1.14 paf 57: MYSQL* handle;
1.19 paf 58: const char* cstrClientCharset;
1.14 paf 59: bool autocommit;
60: };
61:
1.1 parser 62: /**
63: MySQL server driver
64: */
65: class MySQL_Driver : public SQL_Driver {
66: public:
67:
68: MySQL_Driver() : SQL_Driver() {
69: }
70:
71: /// get api version
72: int api_version() { return SQL_DRIVER_API_VERSION; }
73: /// initialize driver by loading sql dynamic link library
1.4 paf 74: const char *initialize(char *dlopen_file_spec) {
1.1 parser 75: return dlopen_file_spec?
76: dlink(dlopen_file_spec):"client library column is empty";
77: }
78: /** connect
79: @param used_only_in_connect_url
1.2 parser 80: format: @b user:pass@host[:port]|[/unix/socket]/database?
81: charset=cp1251_koi8&
82: timeout=3&
83: compress=1&
84: named_pipe=1
1.1 parser 85: 3.23.22b
86: Currently the only option for @b character_set_name is cp1251_koi8.
87: WARNING: must be used only to connect, for buffer doesn't live long
88: */
89: void connect(
90: char *used_only_in_connect_url,
91: SQL_Driver_services& services,
1.14 paf 92: void **connection_ref ///< output: Connection*
1.1 parser 93: ) {
94: char *user=used_only_in_connect_url;
95: char *s=lsplit(user, '@');
96: char *host=0;
97: char *unix_socket=0;
98: if(s && s[0]=='[') { // unix socket
99: unix_socket=1+s;
100: s=lsplit(unix_socket, ']');
101: } else { // IP
102: host=s;
103: }
104: char *db=lsplit(s, '/');
105: char *pwd=lsplit(user, ':');
106: char *error_pos=0;
107: char *port_cstr=lsplit(host, ':');
108: int port=port_cstr?strtol(port_cstr, &error_pos, 0):0;
1.2 parser 109: char *options=lsplit(db, '?');
110:
1.19 paf 111: char *cstrBackwardCompAskServerToTranscode=0;
1.1 parser 112:
1.18 paf 113: Connection& connection=*(Connection *)services.malloc(sizeof(Connection));
1.15 paf 114: connection.services=&services;
1.14 paf 115: connection.handle=mysql_init(NULL);
1.19 paf 116: connection.cstrClientCharset=0;
1.14 paf 117: connection.autocommit=true;
1.18 paf 118: *connection_ref=&connection;
1.2 parser 119:
120: while(options) {
121: if(char *key=lsplit(&options, '&')) {
122: if(*key) {
123: if(char *value=lsplit(key, '=')) {
1.19 paf 124: if(strcmp(key, "ClientCharset" ) == 0) {
1.21 ! paf 125: toupper_str(value, value, strlen(value));
1.19 paf 126: connection.cstrClientCharset=value;
127: } else if(strcasecmp(key, "charset")==0) { // left for backward compatibility, consider using ClientCharset
128: cstrBackwardCompAskServerToTranscode=value;
1.2 parser 129: } else if(strcasecmp(key, "timeout")==0) {
130: unsigned int timeout=(unsigned int)atoi(value);
1.14 paf 131: if(mysql_options(connection.handle, MYSQL_OPT_CONNECT_TIMEOUT, (const char *)&timeout)!=0)
132: services._throw(mysql_error(connection.handle));
1.2 parser 133: } else if(strcasecmp(key, "compress")==0) {
134: if(atoi(value))
1.14 paf 135: if(mysql_options(connection.handle, MYSQL_OPT_COMPRESS, 0)!=0)
136: services._throw(mysql_error(connection.handle));
1.2 parser 137: } else if(strcasecmp(key, "named_pipe")==0) {
138: if(atoi(value))
1.14 paf 139: if(mysql_options(connection.handle, MYSQL_OPT_NAMED_PIPE , 0)!=0)
140: services._throw(mysql_error(connection.handle));
141: } else if(strcasecmp(key, "autocommit")==0) {
142: if(atoi(value)==0) {
143: connection.autocommit=false;
144: }
1.2 parser 145: } else
146: services._throw("unknown connect option" /*key*/);
147: } else
148: services._throw("connect option without =value" /*key*/);
149: }
150: }
151: }
152:
1.19 paf 153: if(connection.cstrClientCharset && cstrBackwardCompAskServerToTranscode)
154: services._throw("use 'ClientCharset' option only, "
155: "'charset' option is obsolete and should not be used with new 'ClientCharset' option");
156:
1.14 paf 157: if(!mysql_real_connect(connection.handle,
1.1 parser 158: host, user, pwd, db, port?port:MYSQL_PORT, unix_socket, 0))
1.14 paf 159: services._throw(mysql_error(connection.handle));
1.1 parser 160:
1.19 paf 161: if(cstrBackwardCompAskServerToTranscode) {
1.1 parser 162: // set charset
163: char statement[MAX_STRING]="set CHARACTER SET "; // cp1251_koi8
1.19 paf 164: strncat(statement, cstrBackwardCompAskServerToTranscode, MAX_STRING);
1.1 parser 165:
1.15 paf 166: exec(connection, statement);
1.1 parser 167: }
168:
1.14 paf 169: if(!connection.autocommit)
1.15 paf 170: exec(connection, "set autocommit=0");
1.14 paf 171: }
172:
1.15 paf 173: void exec(Connection& connection, const char* statement) {
1.14 paf 174: if(mysql_query(connection.handle, statement))
1.15 paf 175: connection.services->_throw(mysql_error(connection.handle));
1.14 paf 176: (*mysql_store_result)(connection.handle); // throw out the result [don't need but must call]
1.1 parser 177: }
1.14 paf 178:
179: void disconnect(void *aconnection) {
180: Connection& connection=*static_cast<Connection*>(aconnection);
181:
182: mysql_close(connection.handle);
1.17 paf 183: connection.handle=0;
1.1 parser 184: }
1.15 paf 185: void commit(void *aconnection) {
1.14 paf 186: Connection& connection=*static_cast<Connection*>(aconnection);
1.1 parser 187:
1.14 paf 188: if(!connection.autocommit)
1.15 paf 189: exec(connection, "commit");
1.14 paf 190: }
1.15 paf 191: void rollback(void *aconnection) {
1.14 paf 192: Connection& connection=*static_cast<Connection*>(aconnection);
193:
194: if(!connection.autocommit)
1.15 paf 195: exec(connection, "rollback");
1.14 paf 196: }
197:
1.15 paf 198: bool ping(void *aconnection) {
1.14 paf 199: Connection& connection=*static_cast<Connection*>(aconnection);
200:
201: return mysql_ping(connection.handle)==0;
1.1 parser 202: }
203:
1.15 paf 204: const char* quote(void *aconnection, const char *from, unsigned int length) {
205: Connection& connection=*static_cast<Connection*>(aconnection);
1.1 parser 206: /*
207: 3.23.22b
208: You must allocate the to buffer to be at least length*2+1 bytes long.
209: (In the worse case, each character may need to be encoded as using two bytes,
210: and you need room for the terminating null byte.)
211: */
1.15 paf 212: char *result=(char*)connection.services->malloc_atomic(length*2+1);
1.13 paf 213: mysql_escape_string(result, from, length);
214: return result;
1.1 parser 215: }
216: void query(
1.15 paf 217: void *aconnection,
1.1 parser 218: const char *astatement, unsigned long offset, unsigned long limit,
219: SQL_Driver_query_event_handlers& handlers) {
1.14 paf 220: Connection& connection=*static_cast<Connection*>(aconnection);
1.15 paf 221: SQL_Driver_services& services=*connection.services;
1.20 paf 222: const char* cstrClientCharset=connection.cstrClientCharset;
1.1 parser 223: MYSQL_RES *res=NULL;
224:
1.19 paf 225: // transcode from $request:charset to connect-string?client_charset
1.20 paf 226: if(cstrClientCharset) {
1.19 paf 227: size_t transcoded_statement_size;
228: services.transcode(astatement, strlen(astatement),
229: astatement, transcoded_statement_size,
230: services.request_charset(),
231: cstrClientCharset);
232: }
233:
1.1 parser 234: const char *statement;
235: if(offset || limit) {
236: size_t statement_size=strlen(astatement);
1.13 paf 237: char *statement_limited=(char *)services.malloc_atomic(
1.1 parser 238: statement_size+MAX_NUMBER*2+8/* limit #,#*/+1);
239: char *cur=statement_limited;
240: memcpy(cur, astatement, statement_size); cur+=statement_size;
241: cur+=sprintf(cur, " limit ");
242: if(offset)
243: cur+=snprintf(cur, MAX_NUMBER+1, "%u,", offset);
244: if(limit)
245: cur+=snprintf(cur, MAX_NUMBER, "%u", limit);
246: statement=statement_limited;
247: } else
248: statement=astatement;
249:
1.14 paf 250: if(mysql_query(connection.handle, statement))
251: services._throw(mysql_error(connection.handle));
252: if(!(res=mysql_store_result(connection.handle)) && mysql_field_count(connection.handle))
253: services._throw(mysql_error(connection.handle));
1.1 parser 254: if(!res) // empty result: insert|delete|update|...
255: return;
256:
257: int column_count=mysql_num_fields(res);
258: if(!column_count) // old client
1.14 paf 259: column_count=mysql_field_count(connection.handle);
1.1 parser 260:
261: if(!column_count) {
262: mysql_free_result(res);
263: services._throw("result contains no columns");
264: }
1.8 paf 265:
1.9 paf 266: bool failed=false;
267: SQL_Error sql_error;
268: #define CHECK(afailed) \
269: if(afailed) { \
270: failed=true; \
271: goto cleanup; \
272: }
273:
274: for(int i=0; i<column_count; i++){
1.12 paf 275: if(MYSQL_FIELD *field=mysql_fetch_field(res)) {
1.20 paf 276: size_t length=strlen(field->name);
277: char* strm=(char*)services.malloc_atomic(length+1);
278: memcpy(strm, field->name, length+1);
279: const char* str=strm;
1.19 paf 280:
281: // transcode to $request:charset from connect-string?client_charset
1.20 paf 282: if(cstrClientCharset) {
1.19 paf 283: services.transcode(str, length,
284: str, length,
285: cstrClientCharset,
286: services.request_charset());
287: }
288:
289: CHECK(handlers.add_column(sql_error, str, length));
1.12 paf 290: } else {
291: // seen some broken client,
292: // which reported "44" for column count of response to "select 2+2"
293: column_count=i;
294: break;
295: }
1.9 paf 296: }
1.1 parser 297:
1.9 paf 298: CHECK(handlers.before_rows(sql_error));
299:
300: while(MYSQL_ROW mysql_row=mysql_fetch_row(res)) {
301: CHECK(handlers.add_row(sql_error));
302: unsigned long *lengths=mysql_fetch_lengths(res);
303: for(int i=0; i<column_count; i++){
1.13 paf 304: size_t length=(size_t)lengths[i];
1.20 paf 305: const char* str;
1.13 paf 306: if(length) {
1.20 paf 307: char *strm=(char*)services.malloc_atomic(length+1);
308: memcpy(strm, mysql_row[i], length);
309: strm[length]=0;
310: str=strm;
1.19 paf 311:
312: // transcode to $request:charset from connect-string?client_charset
1.20 paf 313: if(cstrClientCharset)
1.19 paf 314: services.transcode(str, length,
315: str, length,
316: cstrClientCharset,
317: services.request_charset());
1.9 paf 318: } else
1.13 paf 319: str=0;
320: CHECK(handlers.add_row_cell(sql_error, str, length));
1.3 paf 321: }
1.9 paf 322: }
323: cleanup:
1.1 parser 324: mysql_free_result(res);
1.9 paf 325: if(failed)
326: services._throw(sql_error);
1.1 parser 327: }
328:
329: private: // mysql client library funcs
330:
331: typedef MYSQL* (STDCALL *t_mysql_init)(MYSQL *); t_mysql_init mysql_init;
332:
1.2 parser 333: typedef int (STDCALL *t_mysql_options)(MYSQL *mysql, enum mysql_option option, const char *arg); t_mysql_options mysql_options;
334:
1.1 parser 335: typedef MYSQL_RES* (STDCALL *t_mysql_store_result)(MYSQL *); t_mysql_store_result mysql_store_result;
336:
337: typedef int (STDCALL *t_mysql_query)(MYSQL *, const char *q); t_mysql_query mysql_query;
338:
339: typedef char * (STDCALL *t_mysql_error)(MYSQL *); t_mysql_error mysql_error;
340: static char* STDCALL subst_mysql_error(MYSQL *mysql) { return (mysql)->net.last_error; }
341:
342: typedef MYSQL* (STDCALL *t_mysql_real_connect)(MYSQL *, const char *host,
343: const char *user,
344: const char *passwd,
345: const char *db,
346: unsigned int port,
347: const char *unix_socket,
348: unsigned int clientflag); t_mysql_real_connect mysql_real_connect;
349:
350: typedef void (STDCALL *t_mysql_close)(MYSQL *); t_mysql_close mysql_close;
351:
352: typedef int (STDCALL *t_mysql_ping)(MYSQL *); t_mysql_ping mysql_ping;
353:
354: typedef unsigned long (STDCALL *t_mysql_escape_string)(char *to,const char *from,
355: unsigned long from_length); t_mysql_escape_string mysql_escape_string;
356:
357: typedef void (STDCALL *t_mysql_free_result)(MYSQL_RES *result); t_mysql_free_result mysql_free_result;
358:
359: typedef unsigned long* (STDCALL *t_mysql_fetch_lengths)(MYSQL_RES *result); t_mysql_fetch_lengths mysql_fetch_lengths;
360:
361: typedef MYSQL_ROW (STDCALL *t_mysql_fetch_row)(MYSQL_RES *result); t_mysql_fetch_row mysql_fetch_row;
362:
363: typedef MYSQL_FIELD* (STDCALL *t_mysql_fetch_field)(MYSQL_RES *result); t_mysql_fetch_field mysql_fetch_field;
364:
365: typedef unsigned int (STDCALL *t_mysql_num_fields)(MYSQL_RES *); t_mysql_num_fields mysql_num_fields;
366: static unsigned int STDCALL subst_mysql_num_fields(MYSQL_RES *res) { return res->field_count; }
367:
368: typedef unsigned int (STDCALL *t_mysql_field_count)(MYSQL *); t_mysql_field_count mysql_field_count;
369: static unsigned int STDCALL subst_mysql_field_count(MYSQL *mysql) { return mysql->field_count; }
370:
371: private: // mysql client library funcs linking
372:
373: const char *dlink(const char *dlopen_file_spec) {
1.10 paf 374: if(lt_dlinit())
375: return lt_dlerror();
1.1 parser 376: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
377: if (!handle)
378: return "can not open the dynamic link module";
379:
380: #define DSLINK(name, action) \
381: name=(t_##name)lt_dlsym(handle, #name); \
382: if(!name) \
383: action;
384:
385: #define DLINK(name) DSLINK(name, return "function " #name " was not found")
386: #define SLINK(name) DSLINK(name, name=subst_##name)
387:
388: DLINK(mysql_init);
1.2 parser 389: DLINK(mysql_options);
1.1 parser 390: DLINK(mysql_store_result);
391: DLINK(mysql_query);
392: SLINK(mysql_error);
393: DLINK(mysql_real_connect);
394: DLINK(mysql_close);
395: DLINK(mysql_ping);
396: DLINK(mysql_escape_string);
397: DLINK(mysql_free_result);
398: DLINK(mysql_fetch_lengths);
399: DLINK(mysql_fetch_row);
400: DLINK(mysql_fetch_field);
401: SLINK(mysql_num_fields);
402: SLINK(mysql_field_count);
403: return 0;
404: }
405:
406: };
407:
408: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
409: return new MySQL_Driver();
410: }
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