Annotation of parser3/src/sql/mysql/parser3mysql.C, revision 1.26
1.1 paf 1: /** @file
1.15 paf 2: Parser MySQL driver.
1.1 paf 3:
1.7 paf 4: Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com)
1.1 paf 5:
1.7 paf 6: Author: Alexander Petrosyan <paf@design.ru>(http://design.ru/paf)
1.1 paf 7: */
1.26 ! parser 8: static const char *RCSId="$Id: parser3mysql.C,v 1.25 2001/07/23 11:19:25 parser Exp $";
1.1 paf 9:
1.14 paf 10: #include "config_includes.h"
1.4 paf 11:
1.1 paf 12: #include "pa_sql_driver.h"
1.14 paf 13:
14: #define NO_CLIENT_LONG_LONG
1.4 paf 15: #include "mysql.h"
1.14 paf 16: #include "ltdl.h"
1.1 paf 17:
1.9 paf 18: #define MAX_STRING 0x400
1.11 paf 19: #define MAX_NUMBER 20
1.9 paf 20:
1.11 paf 21: #if _MSC_VER
22: # define snprintf _snprintf
23: #endif
24:
25: static char *lsplit(char *string, char delim) {
1.4 paf 26: if(string) {
27: char *v=strchr(string, delim);
28: if(v) {
29: *v=0;
30: return v+1;
31: }
32: }
33: return 0;
34: }
35:
1.6 paf 36: /**
37: MySQL server driver
38: */
1.1 paf 39: class MySQL_Driver : public SQL_Driver {
40: public:
41:
1.4 paf 42: MySQL_Driver() : SQL_Driver() {
1.3 paf 43: }
1.1 paf 44:
45: /// get api version
1.6 paf 46: int api_version() { return SQL_DRIVER_API_VERSION; }
1.14 paf 47: /// initialize driver by loading sql dynamic link library
48: const char *initialize(const char *dlopen_file_spec) {
1.26 ! parser 49: return dlopen_file_spec?
! 50: dlink(dlopen_file_spec):"client library column is empty";
1.14 paf 51: }
1.16 parser 52: /** connect
1.18 parser 53: @param used_only_in_connect_url
1.21 parser 54: format: @b user:pass@host[:port]|[/unix/socket]/database/charset
1.16 parser 55: 3.23.22b
56: Currently the only option for @b character_set_name is cp1251_koi8.
57: WARNING: must be used only to connect, for buffer doesn't live long
58: */
1.6 paf 59: void connect(
1.18 parser 60: char *used_only_in_connect_url,
61: SQL_Driver_services& services,
1.6 paf 62: void **connection ///< output: MYSQL *
1.5 paf 63: ) {
1.18 parser 64: char *user=used_only_in_connect_url;
1.20 parser 65: char *s=lsplit(user, '@');
66: char *host=0;
67: char *unix_socket=0;
68: if(s && s[0]=='[') { // unix socket
69: unix_socket=1+s;
70: s=lsplit(unix_socket, ']');
71: } else { // IP
72: host=s;
73: }
74: char *db=lsplit(s, '/');
1.4 paf 75: char *pwd=lsplit(user, ':');
76: char *error_pos=0;
77: char *port_cstr=lsplit(host, ':');
78: int port=port_cstr?strtol(port_cstr, &error_pos, 0):0;
1.9 paf 79: char *charset=lsplit(db, '/');
1.4 paf 80:
81: MYSQL *mysql=mysql_init(NULL);
82: if(!mysql_real_connect(mysql,
1.20 parser 83: host, user, pwd, db, port?port:MYSQL_PORT, unix_socket, 0))
1.18 parser 84: services._throw(mysql_error(mysql));
1.4 paf 85:
1.9 paf 86: if(charset) {
87: // set charset
88: char statement[MAX_STRING]="set CHARACTER SET "; // cp1251_koi8
89: strncat(statement, charset, MAX_STRING);
90:
91: if(mysql_query(mysql, statement))
1.18 parser 92: services._throw(mysql_error(mysql));
1.14 paf 93: (*mysql_store_result)(mysql); // throw out the result [don't need but must call]
1.9 paf 94: }
95:
1.6 paf 96: *(MYSQL **)connection=mysql;
1.1 paf 97: }
1.18 parser 98: void disconnect(SQL_Driver_services&, void *connection) {
1.6 paf 99: mysql_close((MYSQL *)connection);
1.1 paf 100: }
1.18 parser 101: void commit(SQL_Driver_services&, void *) {}
102: void rollback(SQL_Driver_services&, void *) {}
1.7 paf 103:
1.18 parser 104: bool ping(SQL_Driver_services&, void *connection) {
1.8 paf 105: return mysql_ping((MYSQL *)connection)==0;
106: }
107:
1.18 parser 108: unsigned int quote(
109: SQL_Driver_services&, void *connection,
1.9 paf 110: char *to, const char *from, unsigned int length) {
111: /*
112: 3.23.22b
113: You must allocate the to buffer to be at least length*2+1 bytes long.
114: (In the worse case, each character may need to be encoded as using two bytes,
115: and you need room for the terminating null byte.)
116:
117: it's already UNTAINT_TIMES_BIGGER
118: */
1.14 paf 119: return (*mysql_escape_string)(to, from, length);
1.9 paf 120: }
1.18 parser 121: void query(
122: SQL_Driver_services& services, void *connection,
1.11 paf 123: const char *astatement, unsigned long offset, unsigned long limit,
1.25 parser 124: SQL_Driver_query_event_handlers& handlers) {
1.7 paf 125:
126: MYSQL *mysql=(MYSQL *)connection;
127: MYSQL_RES *res=NULL;
1.8 paf 128:
1.11 paf 129: const char *statement;
130: if(offset || limit) {
131: size_t statement_size=strlen(astatement);
1.18 parser 132: char *statement_limited=(char *)services.malloc(
1.11 paf 133: statement_size+MAX_NUMBER*2+8/* limit #,#*/+1);
134: char *cur=statement_limited;
135: memcpy(cur, astatement, statement_size); cur+=statement_size;
136: cur+=sprintf(cur, " limit ");
137: if(offset)
1.13 paf 138: cur+=snprintf(cur, MAX_NUMBER+1, "%u,", offset);
1.11 paf 139: if(limit)
1.13 paf 140: cur+=snprintf(cur, MAX_NUMBER, "%u", limit);
1.11 paf 141: statement=statement_limited;
142: } else
143: statement=astatement;
144:
1.7 paf 145: if(mysql_query(mysql, statement))
1.18 parser 146: services._throw(mysql_error(mysql));
1.7 paf 147: if(!(res=mysql_store_result(mysql)) && mysql_field_count(mysql))
1.18 parser 148: services._throw(mysql_error(mysql));
1.25 parser 149: if(!res) // empty result: insert|delete|update|...
1.7 paf 150: return;
151:
1.26 ! parser 152: int column_count=mysql_num_fields(res);
1.25 parser 153: if(!column_count) // old client
154: column_count=mysql_field_count(mysql);
1.14 paf 155:
1.25 parser 156: if(!column_count)
1.19 parser 157: services._throw("result contains no columns");
158:
1.26 ! parser 159: for(int i=0; i<column_count; i++){
1.7 paf 160: MYSQL_FIELD *field=mysql_fetch_field(res);
161: size_t size=strlen(field->name);
1.25 parser 162: void *ptr=services.malloc(size);
163: memcpy(ptr, field->name, size);
164: handlers.add_column(ptr, size);
1.7 paf 165: }
1.25 parser 166:
167: handlers.before_rows();
1.7 paf 168:
1.25 parser 169: if(unsigned long row_count=(unsigned long)mysql_num_rows(res))
170: for(unsigned long r=0; r<row_count; r++)
1.19 parser 171: if(MYSQL_ROW mysql_row=mysql_fetch_row(res)) { // never false..
1.25 parser 172: handlers.add_row();
1.19 parser 173: unsigned long *lengths=mysql_fetch_lengths(res);
1.26 ! parser 174: for(int i=0; i<column_count; i++){
1.19 parser 175: size_t size=(size_t)lengths[i];
1.25 parser 176: void *ptr;
1.24 parser 177: if(size) {
1.25 parser 178: ptr=services.malloc(size);
179: memcpy(ptr, mysql_row[i], size);
1.24 parser 180: } else
1.25 parser 181: ptr=0;
182: handlers.add_row_cell(ptr, size);
1.19 parser 183: }
1.7 paf 184: }
1.19 parser 185:
1.7 paf 186: mysql_free_result(res);
187: }
1.14 paf 188:
189: private: // mysql client library funcs
190:
191: typedef MYSQL* (STDCALL *t_mysql_init)(MYSQL *); t_mysql_init mysql_init;
192:
193: typedef MYSQL_RES* (STDCALL *t_mysql_store_result)(MYSQL *); t_mysql_store_result mysql_store_result;
194:
195: typedef int (STDCALL *t_mysql_query)(MYSQL *, const char *q); t_mysql_query mysql_query;
196:
197: typedef char * (STDCALL *t_mysql_error)(MYSQL *); t_mysql_error mysql_error;
198: static char* STDCALL subst_mysql_error(MYSQL *mysql) { return (mysql)->net.last_error; }
199:
200: typedef MYSQL* (STDCALL *t_mysql_real_connect)(MYSQL *, const char *host,
201: const char *user,
202: const char *passwd,
203: const char *db,
204: unsigned int port,
205: const char *unix_socket,
206: unsigned int clientflag); t_mysql_real_connect mysql_real_connect;
207:
208: typedef void (STDCALL *t_mysql_close)(MYSQL *); t_mysql_close mysql_close;
209:
210: typedef int (STDCALL *t_mysql_ping)(MYSQL *); t_mysql_ping mysql_ping;
211:
212: typedef unsigned long (STDCALL *t_mysql_escape_string)(char *to,const char *from,
213: unsigned long from_length); t_mysql_escape_string mysql_escape_string;
214:
215: typedef void (STDCALL *t_mysql_free_result)(MYSQL_RES *result); t_mysql_free_result mysql_free_result;
216:
217: typedef unsigned long* (STDCALL *t_mysql_fetch_lengths)(MYSQL_RES *result); t_mysql_fetch_lengths mysql_fetch_lengths;
218:
219: typedef MYSQL_ROW (STDCALL *t_mysql_fetch_row)(MYSQL_RES *result); t_mysql_fetch_row mysql_fetch_row;
220:
221: typedef MYSQL_FIELD* (STDCALL *t_mysql_fetch_field)(MYSQL_RES *result); t_mysql_fetch_field mysql_fetch_field;
222:
223: typedef my_ulonglong (STDCALL *t_mysql_num_rows)(MYSQL_RES *); t_mysql_num_rows mysql_num_rows;
224: static my_ulonglong STDCALL subst_mysql_num_rows(MYSQL_RES *res) { return res->row_count; }
225:
226: typedef unsigned int (STDCALL *t_mysql_num_fields)(MYSQL_RES *); t_mysql_num_fields mysql_num_fields;
227: static unsigned int STDCALL subst_mysql_num_fields(MYSQL_RES *res) { return res->field_count; }
228:
229: typedef unsigned int (STDCALL *t_mysql_field_count)(MYSQL *); t_mysql_field_count mysql_field_count;
230: static unsigned int STDCALL subst_mysql_field_count(MYSQL *mysql) { return mysql->field_count; }
231:
232: private: // mysql client library funcs linking
233:
234: const char *dlink(const char *dlopen_file_spec) {
235: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
236: if (!handle)
237: return "can not open the dynamic link module";
238:
239: #define DSLINK(name, action) \
240: name=(t_##name)lt_dlsym(handle, #name); \
241: if(!name) \
242: action;
243:
244: #define DLINK(name) DSLINK(name, return "function " #name " was not found")
245: #define SLINK(name) DSLINK(name, name=subst_##name)
246:
247: DLINK(mysql_init);
248: DLINK(mysql_store_result);
249: DLINK(mysql_query);
250: SLINK(mysql_error);
251: DLINK(mysql_real_connect);
252: DLINK(mysql_close);
253: DLINK(mysql_ping);
254: DLINK(mysql_escape_string);
255: DLINK(mysql_free_result);
256: DLINK(mysql_fetch_lengths);
257: DLINK(mysql_fetch_row);
258: DLINK(mysql_fetch_field);
259: SLINK(mysql_num_rows);
260: SLINK(mysql_num_fields);
261: SLINK(mysql_field_count);
262: return 0;
263: }
264:
1.1 paf 265: };
266:
267: extern "C" SQL_Driver *create() {
268: return new MySQL_Driver();
269: }
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