Annotation of parser3/src/sql/mysql/parser3mysql.C, revision 1.21
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:
1.21 ! parser 8: $Id: parser3mysql.C,v 1.20 2001/05/17 17:10:12 parser Exp $
1.1 paf 9: */
10:
1.14 paf 11: #include "config_includes.h"
1.4 paf 12:
1.1 paf 13: #include "pa_sql_driver.h"
1.14 paf 14:
15: #define NO_CLIENT_LONG_LONG
1.4 paf 16: #include "mysql.h"
1.14 paf 17: #include "ltdl.h"
1.1 paf 18:
1.9 paf 19: #define MAX_STRING 0x400
1.11 paf 20: #define MAX_NUMBER 20
1.9 paf 21:
1.11 paf 22: #if _MSC_VER
23: # define snprintf _snprintf
24: #endif
25:
26: static char *lsplit(char *string, char delim) {
1.4 paf 27: if(string) {
28: char *v=strchr(string, delim);
29: if(v) {
30: *v=0;
31: return v+1;
32: }
33: }
34: return 0;
35: }
36:
1.6 paf 37: /**
38: MySQL server driver
39: */
1.1 paf 40: class MySQL_Driver : public SQL_Driver {
41: public:
42:
1.4 paf 43: MySQL_Driver() : SQL_Driver() {
1.3 paf 44: }
1.1 paf 45:
46: /// get api version
1.6 paf 47: int api_version() { return SQL_DRIVER_API_VERSION; }
1.14 paf 48: /// initialize driver by loading sql dynamic link library
49: const char *initialize(const char *dlopen_file_spec) {
50: return dlink(dlopen_file_spec);
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,
1.7 paf 124: unsigned int *column_count, Cell **columns,
125: unsigned long *row_count, Cell ***rows) {
126:
127: MYSQL *mysql=(MYSQL *)connection;
128: MYSQL_RES *res=NULL;
1.8 paf 129:
1.11 paf 130: const char *statement;
131: if(offset || limit) {
132: size_t statement_size=strlen(astatement);
1.18 parser 133: char *statement_limited=(char *)services.malloc(
1.11 paf 134: statement_size+MAX_NUMBER*2+8/* limit #,#*/+1);
135: char *cur=statement_limited;
136: memcpy(cur, astatement, statement_size); cur+=statement_size;
137: cur+=sprintf(cur, " limit ");
138: if(offset)
1.13 paf 139: cur+=snprintf(cur, MAX_NUMBER+1, "%u,", offset);
1.11 paf 140: if(limit)
1.13 paf 141: cur+=snprintf(cur, MAX_NUMBER, "%u", limit);
1.11 paf 142: statement=statement_limited;
143: } else
144: statement=astatement;
145:
1.7 paf 146: if(mysql_query(mysql, statement))
1.18 parser 147: services._throw(mysql_error(mysql));
1.7 paf 148: if(!(res=mysql_store_result(mysql)) && mysql_field_count(mysql))
1.18 parser 149: services._throw(mysql_error(mysql));
1.7 paf 150: if(!res) {
151: // empty result
152: *row_count=0;
153: *column_count=0;
154: return;
155: }
156:
157: *column_count=mysql_num_fields(res);
1.14 paf 158: if(!*column_count) // old client
159: *column_count=mysql_field_count(mysql);
160:
1.19 parser 161: if(!*column_count)
162: services._throw("result contains no columns");
163:
1.18 parser 164: *columns=(Cell *)services.malloc(sizeof(Cell)*(*column_count));
1.7 paf 165: for(unsigned int i=0; i<(*column_count); i++){
166: MYSQL_FIELD *field=mysql_fetch_field(res);
167: size_t size=strlen(field->name);
168: (*columns)[i].size=size;
1.18 parser 169: (*columns)[i].ptr=services.malloc(size);
1.7 paf 170: memcpy((*columns)[i].ptr, field->name, size);
171: }
172:
1.19 parser 173: if(*row_count=(unsigned long)mysql_num_rows(res)) {
174: *rows=(Cell **)services.malloc(sizeof(Cell *)*(*row_count));
175:
176: for(unsigned long r=0; r<(*row_count); r++)
177: if(MYSQL_ROW mysql_row=mysql_fetch_row(res)) { // never false..
178: unsigned long *lengths=mysql_fetch_lengths(res);
179: Cell *row=(Cell *)malloc(sizeof(Cell)*(*column_count));
180: (*rows)[r]=row;
181: for(unsigned int i=0; i<(*column_count); i++){
182: size_t size=(size_t)lengths[i];
183: row[i].size=size;
184: row[i].ptr=services.malloc(size);
185: memcpy(row[i].ptr, mysql_row[i], size);
186: }
1.7 paf 187: }
1.19 parser 188: } else
189: *rows=0;
190:
1.7 paf 191: mysql_free_result(res);
192: }
1.14 paf 193:
194: private: // mysql client library funcs
195:
196: typedef MYSQL* (STDCALL *t_mysql_init)(MYSQL *); t_mysql_init mysql_init;
197:
198: typedef MYSQL_RES* (STDCALL *t_mysql_store_result)(MYSQL *); t_mysql_store_result mysql_store_result;
199:
200: typedef int (STDCALL *t_mysql_query)(MYSQL *, const char *q); t_mysql_query mysql_query;
201:
202: typedef char * (STDCALL *t_mysql_error)(MYSQL *); t_mysql_error mysql_error;
203: static char* STDCALL subst_mysql_error(MYSQL *mysql) { return (mysql)->net.last_error; }
204:
205: typedef MYSQL* (STDCALL *t_mysql_real_connect)(MYSQL *, const char *host,
206: const char *user,
207: const char *passwd,
208: const char *db,
209: unsigned int port,
210: const char *unix_socket,
211: unsigned int clientflag); t_mysql_real_connect mysql_real_connect;
212:
213: typedef void (STDCALL *t_mysql_close)(MYSQL *); t_mysql_close mysql_close;
214:
215: typedef int (STDCALL *t_mysql_ping)(MYSQL *); t_mysql_ping mysql_ping;
216:
217: typedef unsigned long (STDCALL *t_mysql_escape_string)(char *to,const char *from,
218: unsigned long from_length); t_mysql_escape_string mysql_escape_string;
219:
220: typedef void (STDCALL *t_mysql_free_result)(MYSQL_RES *result); t_mysql_free_result mysql_free_result;
221:
222: typedef unsigned long* (STDCALL *t_mysql_fetch_lengths)(MYSQL_RES *result); t_mysql_fetch_lengths mysql_fetch_lengths;
223:
224: typedef MYSQL_ROW (STDCALL *t_mysql_fetch_row)(MYSQL_RES *result); t_mysql_fetch_row mysql_fetch_row;
225:
226: typedef MYSQL_FIELD* (STDCALL *t_mysql_fetch_field)(MYSQL_RES *result); t_mysql_fetch_field mysql_fetch_field;
227:
228: typedef my_ulonglong (STDCALL *t_mysql_num_rows)(MYSQL_RES *); t_mysql_num_rows mysql_num_rows;
229: static my_ulonglong STDCALL subst_mysql_num_rows(MYSQL_RES *res) { return res->row_count; }
230:
231: typedef unsigned int (STDCALL *t_mysql_num_fields)(MYSQL_RES *); t_mysql_num_fields mysql_num_fields;
232: static unsigned int STDCALL subst_mysql_num_fields(MYSQL_RES *res) { return res->field_count; }
233:
234: typedef unsigned int (STDCALL *t_mysql_field_count)(MYSQL *); t_mysql_field_count mysql_field_count;
235: static unsigned int STDCALL subst_mysql_field_count(MYSQL *mysql) { return mysql->field_count; }
236:
237: private: // mysql client library funcs linking
238:
239: const char *dlink(const char *dlopen_file_spec) {
240: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
241: if (!handle)
242: return "can not open the dynamic link module";
243:
244: #define DSLINK(name, action) \
245: name=(t_##name)lt_dlsym(handle, #name); \
246: if(!name) \
247: action;
248:
249: #define DLINK(name) DSLINK(name, return "function " #name " was not found")
250: #define SLINK(name) DSLINK(name, name=subst_##name)
251:
252: DLINK(mysql_init);
253: DLINK(mysql_store_result);
254: DLINK(mysql_query);
255: SLINK(mysql_error);
256: DLINK(mysql_real_connect);
257: DLINK(mysql_close);
258: DLINK(mysql_ping);
259: DLINK(mysql_escape_string);
260: DLINK(mysql_free_result);
261: DLINK(mysql_fetch_lengths);
262: DLINK(mysql_fetch_row);
263: DLINK(mysql_fetch_field);
264: SLINK(mysql_num_rows);
265: SLINK(mysql_num_fields);
266: SLINK(mysql_field_count);
267: return 0;
268: }
269:
1.1 paf 270: };
271:
272: extern "C" SQL_Driver *create() {
273: return new MySQL_Driver();
274: }
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