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1.1 parser 1: /** @file
2: Parser MySQL driver.
3:
1.9.4.1 ! 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: */
1.9.4.1 ! paf 13: static const char *RCSId="$Id: parser3mysql.C,v 1.12 2003/01/31 09:33:15 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:
1.1 parser 49: /**
50: MySQL server driver
51: */
52: class MySQL_Driver : public SQL_Driver {
53: public:
54:
55: MySQL_Driver() : SQL_Driver() {
56: }
57:
58: /// get api version
59: int api_version() { return SQL_DRIVER_API_VERSION; }
60: /// initialize driver by loading sql dynamic link library
1.4 paf 61: const char *initialize(char *dlopen_file_spec) {
1.1 parser 62: return dlopen_file_spec?
63: dlink(dlopen_file_spec):"client library column is empty";
64: }
65: /** connect
66: @param used_only_in_connect_url
1.2 parser 67: format: @b user:pass@host[:port]|[/unix/socket]/database?
68: charset=cp1251_koi8&
69: timeout=3&
70: compress=1&
71: named_pipe=1
1.1 parser 72: 3.23.22b
73: Currently the only option for @b character_set_name is cp1251_koi8.
74: WARNING: must be used only to connect, for buffer doesn't live long
75: */
76: void connect(
77: char *used_only_in_connect_url,
78: SQL_Driver_services& services,
79: void **connection ///< output: MYSQL *
80: ) {
81: char *user=used_only_in_connect_url;
82: char *s=lsplit(user, '@');
83: char *host=0;
84: char *unix_socket=0;
85: if(s && s[0]=='[') { // unix socket
86: unix_socket=1+s;
87: s=lsplit(unix_socket, ']');
88: } else { // IP
89: host=s;
90: }
91: char *db=lsplit(s, '/');
92: char *pwd=lsplit(user, ':');
93: char *error_pos=0;
94: char *port_cstr=lsplit(host, ':');
95: int port=port_cstr?strtol(port_cstr, &error_pos, 0):0;
1.2 parser 96: char *options=lsplit(db, '?');
97:
98: char *charset=0;
1.1 parser 99:
100: MYSQL *mysql=mysql_init(NULL);
1.2 parser 101:
102: while(options) {
103: if(char *key=lsplit(&options, '&')) {
104: if(*key) {
105: if(char *value=lsplit(key, '=')) {
106: if(strcasecmp(key, "charset")==0) {
107: charset=value;
108: } else if(strcasecmp(key, "timeout")==0) {
109: unsigned int timeout=(unsigned int)atoi(value);
110: if(mysql_options(mysql, MYSQL_OPT_CONNECT_TIMEOUT, (const char *)&timeout)!=0)
111: services._throw(mysql_error(mysql));
112: } else if(strcasecmp(key, "compress")==0) {
113: if(atoi(value))
114: if(mysql_options(mysql, MYSQL_OPT_COMPRESS, 0)!=0)
115: services._throw(mysql_error(mysql));
116: } else if(strcasecmp(key, "named_pipe")==0) {
117: if(atoi(value))
118: if(mysql_options(mysql, MYSQL_OPT_NAMED_PIPE , 0)!=0)
119: services._throw(mysql_error(mysql));
120: } else
121: services._throw("unknown connect option" /*key*/);
122: } else
123: services._throw("connect option without =value" /*key*/);
124: }
125: }
126: }
127:
1.1 parser 128: if(!mysql_real_connect(mysql,
129: host, user, pwd, db, port?port:MYSQL_PORT, unix_socket, 0))
130: services._throw(mysql_error(mysql));
131:
1.2 parser 132: if(charset) {
1.1 parser 133: // set charset
134: char statement[MAX_STRING]="set CHARACTER SET "; // cp1251_koi8
135: strncat(statement, charset, MAX_STRING);
136:
137: if(mysql_query(mysql, statement))
138: services._throw(mysql_error(mysql));
139: (*mysql_store_result)(mysql); // throw out the result [don't need but must call]
140: }
141:
142: *(MYSQL **)connection=mysql;
143: }
144: void disconnect(void *connection) {
145: mysql_close((MYSQL *)connection);
146: }
147: void commit(SQL_Driver_services&, void *) {}
148: void rollback(SQL_Driver_services&, void *) {}
149:
150: bool ping(SQL_Driver_services&, void *connection) {
151: return mysql_ping((MYSQL *)connection)==0;
152: }
153:
154: unsigned int quote(
155: SQL_Driver_services&, void *connection,
156: char *to, const char *from, unsigned int length) {
157: /*
158: 3.23.22b
159: You must allocate the to buffer to be at least length*2+1 bytes long.
160: (In the worse case, each character may need to be encoded as using two bytes,
161: and you need room for the terminating null byte.)
162: */
1.5 paf 163: if(to) // store mode
164: return mysql_escape_string(to, from, length);
165: else // estimate mode
166: return length*2+1;
1.1 parser 167: }
168: void query(
169: SQL_Driver_services& services, void *connection,
170: const char *astatement, unsigned long offset, unsigned long limit,
171: SQL_Driver_query_event_handlers& handlers) {
172:
173: MYSQL *mysql=(MYSQL *)connection;
174: MYSQL_RES *res=NULL;
175:
176: const char *statement;
177: if(offset || limit) {
178: size_t statement_size=strlen(astatement);
179: char *statement_limited=(char *)services.malloc(
180: statement_size+MAX_NUMBER*2+8/* limit #,#*/+1);
181: char *cur=statement_limited;
182: memcpy(cur, astatement, statement_size); cur+=statement_size;
183: cur+=sprintf(cur, " limit ");
184: if(offset)
185: cur+=snprintf(cur, MAX_NUMBER+1, "%u,", offset);
186: if(limit)
187: cur+=snprintf(cur, MAX_NUMBER, "%u", limit);
188: statement=statement_limited;
189: } else
190: statement=astatement;
191:
192: if(mysql_query(mysql, statement))
193: services._throw(mysql_error(mysql));
194: if(!(res=mysql_store_result(mysql)) && mysql_field_count(mysql))
195: services._throw(mysql_error(mysql));
196: if(!res) // empty result: insert|delete|update|...
197: return;
198:
199: int column_count=mysql_num_fields(res);
200: if(!column_count) // old client
201: column_count=mysql_field_count(mysql);
202:
203: if(!column_count) {
204: mysql_free_result(res);
205: services._throw("result contains no columns");
206: }
1.8 paf 207:
1.9 paf 208: bool failed=false;
209: SQL_Error sql_error;
210: #define CHECK(afailed) \
211: if(afailed) { \
212: failed=true; \
213: goto cleanup; \
214: }
215:
216: for(int i=0; i<column_count; i++){
1.9.4.1 ! paf 217: if(MYSQL_FIELD *field=mysql_fetch_field(res)) {
! 218: size_t size=strlen(field->name);
! 219: void *ptr=services.malloc(size);
! 220: memcpy(ptr, field->name, size);
! 221: CHECK(handlers.add_column(sql_error, ptr, size));
! 222: } else {
! 223: // seen some broken client,
! 224: // which reported "44" for column count of response to "select 2+2"
! 225: column_count=i;
! 226: break;
! 227: }
1.9 paf 228: }
1.1 parser 229:
1.9 paf 230: CHECK(handlers.before_rows(sql_error));
231:
232: while(MYSQL_ROW mysql_row=mysql_fetch_row(res)) {
233: CHECK(handlers.add_row(sql_error));
234: unsigned long *lengths=mysql_fetch_lengths(res);
235: for(int i=0; i<column_count; i++){
236: size_t size=(size_t)lengths[i];
237: void *ptr;
238: if(size) {
239: ptr=services.malloc(size);
240: memcpy(ptr, mysql_row[i], size);
241: } else
242: ptr=0;
243: CHECK(handlers.add_row_cell(sql_error, ptr, size));
1.3 paf 244: }
1.9 paf 245: }
246: cleanup:
1.1 parser 247: mysql_free_result(res);
1.9 paf 248: if(failed)
249: services._throw(sql_error);
1.1 parser 250: }
251:
252: private: // mysql client library funcs
253:
254: typedef MYSQL* (STDCALL *t_mysql_init)(MYSQL *); t_mysql_init mysql_init;
255:
1.2 parser 256: typedef int (STDCALL *t_mysql_options)(MYSQL *mysql, enum mysql_option option, const char *arg); t_mysql_options mysql_options;
257:
1.1 parser 258: typedef MYSQL_RES* (STDCALL *t_mysql_store_result)(MYSQL *); t_mysql_store_result mysql_store_result;
259:
260: typedef int (STDCALL *t_mysql_query)(MYSQL *, const char *q); t_mysql_query mysql_query;
261:
262: typedef char * (STDCALL *t_mysql_error)(MYSQL *); t_mysql_error mysql_error;
263: static char* STDCALL subst_mysql_error(MYSQL *mysql) { return (mysql)->net.last_error; }
264:
265: typedef MYSQL* (STDCALL *t_mysql_real_connect)(MYSQL *, const char *host,
266: const char *user,
267: const char *passwd,
268: const char *db,
269: unsigned int port,
270: const char *unix_socket,
271: unsigned int clientflag); t_mysql_real_connect mysql_real_connect;
272:
273: typedef void (STDCALL *t_mysql_close)(MYSQL *); t_mysql_close mysql_close;
274:
275: typedef int (STDCALL *t_mysql_ping)(MYSQL *); t_mysql_ping mysql_ping;
276:
277: typedef unsigned long (STDCALL *t_mysql_escape_string)(char *to,const char *from,
278: unsigned long from_length); t_mysql_escape_string mysql_escape_string;
279:
280: typedef void (STDCALL *t_mysql_free_result)(MYSQL_RES *result); t_mysql_free_result mysql_free_result;
281:
282: typedef unsigned long* (STDCALL *t_mysql_fetch_lengths)(MYSQL_RES *result); t_mysql_fetch_lengths mysql_fetch_lengths;
283:
284: typedef MYSQL_ROW (STDCALL *t_mysql_fetch_row)(MYSQL_RES *result); t_mysql_fetch_row mysql_fetch_row;
285:
286: typedef MYSQL_FIELD* (STDCALL *t_mysql_fetch_field)(MYSQL_RES *result); t_mysql_fetch_field mysql_fetch_field;
287:
288: typedef unsigned int (STDCALL *t_mysql_num_fields)(MYSQL_RES *); t_mysql_num_fields mysql_num_fields;
289: static unsigned int STDCALL subst_mysql_num_fields(MYSQL_RES *res) { return res->field_count; }
290:
291: typedef unsigned int (STDCALL *t_mysql_field_count)(MYSQL *); t_mysql_field_count mysql_field_count;
292: static unsigned int STDCALL subst_mysql_field_count(MYSQL *mysql) { return mysql->field_count; }
293:
294: private: // mysql client library funcs linking
295:
296: const char *dlink(const char *dlopen_file_spec) {
1.9.4.1 ! paf 297: if(lt_dlinit())
! 298: return lt_dlerror();
1.1 parser 299: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
300: if (!handle)
301: return "can not open the dynamic link module";
302:
303: #define DSLINK(name, action) \
304: name=(t_##name)lt_dlsym(handle, #name); \
305: if(!name) \
306: action;
307:
308: #define DLINK(name) DSLINK(name, return "function " #name " was not found")
309: #define SLINK(name) DSLINK(name, name=subst_##name)
310:
311: DLINK(mysql_init);
1.2 parser 312: DLINK(mysql_options);
1.1 parser 313: DLINK(mysql_store_result);
314: DLINK(mysql_query);
315: SLINK(mysql_error);
316: DLINK(mysql_real_connect);
317: DLINK(mysql_close);
318: DLINK(mysql_ping);
319: DLINK(mysql_escape_string);
320: DLINK(mysql_free_result);
321: DLINK(mysql_fetch_lengths);
322: DLINK(mysql_fetch_row);
323: DLINK(mysql_fetch_field);
324: SLINK(mysql_num_fields);
325: SLINK(mysql_field_count);
326: return 0;
327: }
328:
329: };
330:
331: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
332: return new MySQL_Driver();
333: }