Annotation of parser3/src/sql/mysql/parser3mysql.C, revision 1.19
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:
1.19 ! parser 8: $Id: parser3mysql.C,v 1.18 2001/05/17 13:23:28 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
1.16 parser 54: format: @b user:pass@host[:port]/database/charset
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;
1.4 paf 65: char *host=lsplit(user, '@');
66: char *db=lsplit(host, '/');
67: char *pwd=lsplit(user, ':');
68: char *error_pos=0;
69: char *port_cstr=lsplit(host, ':');
70: int port=port_cstr?strtol(port_cstr, &error_pos, 0):0;
1.9 paf 71: char *charset=lsplit(db, '/');
1.4 paf 72:
73: MYSQL *mysql=mysql_init(NULL);
74: if(!mysql_real_connect(mysql,
75: host, user, pwd, db, port?port:MYSQL_PORT, NULL, 0))
1.18 parser 76: services._throw(mysql_error(mysql));
1.4 paf 77:
1.9 paf 78: if(charset) {
79: // set charset
80: char statement[MAX_STRING]="set CHARACTER SET "; // cp1251_koi8
81: strncat(statement, charset, MAX_STRING);
82:
83: if(mysql_query(mysql, statement))
1.18 parser 84: services._throw(mysql_error(mysql));
1.14 paf 85: (*mysql_store_result)(mysql); // throw out the result [don't need but must call]
1.9 paf 86: }
87:
1.6 paf 88: *(MYSQL **)connection=mysql;
1.1 paf 89: }
1.18 parser 90: void disconnect(SQL_Driver_services&, void *connection) {
1.6 paf 91: mysql_close((MYSQL *)connection);
1.1 paf 92: }
1.18 parser 93: void commit(SQL_Driver_services&, void *) {}
94: void rollback(SQL_Driver_services&, void *) {}
1.7 paf 95:
1.18 parser 96: bool ping(SQL_Driver_services&, void *connection) {
1.8 paf 97: return mysql_ping((MYSQL *)connection)==0;
98: }
99:
1.18 parser 100: unsigned int quote(
101: SQL_Driver_services&, void *connection,
1.9 paf 102: char *to, const char *from, unsigned int length) {
103: /*
104: 3.23.22b
105: You must allocate the to buffer to be at least length*2+1 bytes long.
106: (In the worse case, each character may need to be encoded as using two bytes,
107: and you need room for the terminating null byte.)
108:
109: it's already UNTAINT_TIMES_BIGGER
110: */
1.14 paf 111: return (*mysql_escape_string)(to, from, length);
1.9 paf 112: }
1.18 parser 113: void query(
114: SQL_Driver_services& services, void *connection,
1.11 paf 115: const char *astatement, unsigned long offset, unsigned long limit,
1.7 paf 116: unsigned int *column_count, Cell **columns,
117: unsigned long *row_count, Cell ***rows) {
118:
119: MYSQL *mysql=(MYSQL *)connection;
120: MYSQL_RES *res=NULL;
1.8 paf 121:
1.11 paf 122: const char *statement;
123: if(offset || limit) {
124: size_t statement_size=strlen(astatement);
1.18 parser 125: char *statement_limited=(char *)services.malloc(
1.11 paf 126: statement_size+MAX_NUMBER*2+8/* limit #,#*/+1);
127: char *cur=statement_limited;
128: memcpy(cur, astatement, statement_size); cur+=statement_size;
129: cur+=sprintf(cur, " limit ");
130: if(offset)
1.13 paf 131: cur+=snprintf(cur, MAX_NUMBER+1, "%u,", offset);
1.11 paf 132: if(limit)
1.13 paf 133: cur+=snprintf(cur, MAX_NUMBER, "%u", limit);
1.11 paf 134: statement=statement_limited;
135: } else
136: statement=astatement;
137:
1.7 paf 138: if(mysql_query(mysql, statement))
1.18 parser 139: services._throw(mysql_error(mysql));
1.7 paf 140: if(!(res=mysql_store_result(mysql)) && mysql_field_count(mysql))
1.18 parser 141: services._throw(mysql_error(mysql));
1.7 paf 142: if(!res) {
143: // empty result
144: *row_count=0;
145: *column_count=0;
146: return;
147: }
148:
149: *column_count=mysql_num_fields(res);
1.14 paf 150: if(!*column_count) // old client
151: *column_count=mysql_field_count(mysql);
152:
1.19 ! parser 153: if(!*column_count)
! 154: services._throw("result contains no columns");
! 155:
1.18 parser 156: *columns=(Cell *)services.malloc(sizeof(Cell)*(*column_count));
1.7 paf 157: for(unsigned int i=0; i<(*column_count); i++){
158: MYSQL_FIELD *field=mysql_fetch_field(res);
159: size_t size=strlen(field->name);
160: (*columns)[i].size=size;
1.18 parser 161: (*columns)[i].ptr=services.malloc(size);
1.7 paf 162: memcpy((*columns)[i].ptr, field->name, size);
163: }
164:
1.19 ! parser 165: if(*row_count=(unsigned long)mysql_num_rows(res)) {
! 166: *rows=(Cell **)services.malloc(sizeof(Cell *)*(*row_count));
! 167:
! 168: for(unsigned long r=0; r<(*row_count); r++)
! 169: if(MYSQL_ROW mysql_row=mysql_fetch_row(res)) { // never false..
! 170: unsigned long *lengths=mysql_fetch_lengths(res);
! 171: Cell *row=(Cell *)malloc(sizeof(Cell)*(*column_count));
! 172: (*rows)[r]=row;
! 173: for(unsigned int i=0; i<(*column_count); i++){
! 174: size_t size=(size_t)lengths[i];
! 175: row[i].size=size;
! 176: row[i].ptr=services.malloc(size);
! 177: memcpy(row[i].ptr, mysql_row[i], size);
! 178: }
1.7 paf 179: }
1.19 ! parser 180: } else
! 181: *rows=0;
! 182:
1.7 paf 183: mysql_free_result(res);
184: }
1.14 paf 185:
186: private: // mysql client library funcs
187:
188: typedef MYSQL* (STDCALL *t_mysql_init)(MYSQL *); t_mysql_init mysql_init;
189:
190: typedef MYSQL_RES* (STDCALL *t_mysql_store_result)(MYSQL *); t_mysql_store_result mysql_store_result;
191:
192: typedef int (STDCALL *t_mysql_query)(MYSQL *, const char *q); t_mysql_query mysql_query;
193:
194: typedef char * (STDCALL *t_mysql_error)(MYSQL *); t_mysql_error mysql_error;
195: static char* STDCALL subst_mysql_error(MYSQL *mysql) { return (mysql)->net.last_error; }
196:
197: typedef MYSQL* (STDCALL *t_mysql_real_connect)(MYSQL *, const char *host,
198: const char *user,
199: const char *passwd,
200: const char *db,
201: unsigned int port,
202: const char *unix_socket,
203: unsigned int clientflag); t_mysql_real_connect mysql_real_connect;
204:
205: typedef void (STDCALL *t_mysql_close)(MYSQL *); t_mysql_close mysql_close;
206:
207: typedef int (STDCALL *t_mysql_ping)(MYSQL *); t_mysql_ping mysql_ping;
208:
209: typedef unsigned long (STDCALL *t_mysql_escape_string)(char *to,const char *from,
210: unsigned long from_length); t_mysql_escape_string mysql_escape_string;
211:
212: typedef void (STDCALL *t_mysql_free_result)(MYSQL_RES *result); t_mysql_free_result mysql_free_result;
213:
214: typedef unsigned long* (STDCALL *t_mysql_fetch_lengths)(MYSQL_RES *result); t_mysql_fetch_lengths mysql_fetch_lengths;
215:
216: typedef MYSQL_ROW (STDCALL *t_mysql_fetch_row)(MYSQL_RES *result); t_mysql_fetch_row mysql_fetch_row;
217:
218: typedef MYSQL_FIELD* (STDCALL *t_mysql_fetch_field)(MYSQL_RES *result); t_mysql_fetch_field mysql_fetch_field;
219:
220: typedef my_ulonglong (STDCALL *t_mysql_num_rows)(MYSQL_RES *); t_mysql_num_rows mysql_num_rows;
221: static my_ulonglong STDCALL subst_mysql_num_rows(MYSQL_RES *res) { return res->row_count; }
222:
223: typedef unsigned int (STDCALL *t_mysql_num_fields)(MYSQL_RES *); t_mysql_num_fields mysql_num_fields;
224: static unsigned int STDCALL subst_mysql_num_fields(MYSQL_RES *res) { return res->field_count; }
225:
226: typedef unsigned int (STDCALL *t_mysql_field_count)(MYSQL *); t_mysql_field_count mysql_field_count;
227: static unsigned int STDCALL subst_mysql_field_count(MYSQL *mysql) { return mysql->field_count; }
228:
229: private: // mysql client library funcs linking
230:
231: const char *dlink(const char *dlopen_file_spec) {
232: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
233: if (!handle)
234: return "can not open the dynamic link module";
235:
236: #define DSLINK(name, action) \
237: name=(t_##name)lt_dlsym(handle, #name); \
238: if(!name) \
239: action;
240:
241: #define DLINK(name) DSLINK(name, return "function " #name " was not found")
242: #define SLINK(name) DSLINK(name, name=subst_##name)
243:
244: DLINK(mysql_init);
245: DLINK(mysql_store_result);
246: DLINK(mysql_query);
247: SLINK(mysql_error);
248: DLINK(mysql_real_connect);
249: DLINK(mysql_close);
250: DLINK(mysql_ping);
251: DLINK(mysql_escape_string);
252: DLINK(mysql_free_result);
253: DLINK(mysql_fetch_lengths);
254: DLINK(mysql_fetch_row);
255: DLINK(mysql_fetch_field);
256: SLINK(mysql_num_rows);
257: SLINK(mysql_num_fields);
258: SLINK(mysql_field_count);
259: return 0;
260: }
261:
1.1 paf 262: };
263:
264: extern "C" SQL_Driver *create() {
265: return new MySQL_Driver();
266: }
E-mail:
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to parser3mysql.C CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [parser3project] / parser3 / src / sql / mysql