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1.1 parser 1: /** @file
2: Parser Oracle driver.
3:
4: Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com)
5:
6: Author: Alexander Petrosyan <paf@design.ru>(http://design.ru/paf)
7:
8: 2001.07.30 using Oracle 8.1.6 [@test tested with Oracle 7.x.x]
9: */
1.5 ! paf 10: static const char *RCSId="$Id: parser3oracle.C,v 1.4 2001/11/10 16:11:24 paf Exp $";
1.1 parser 11:
12: #include "config_includes.h"
13:
14: #include "pa_sql_driver.h"
15:
16: #include <oci.h>
17:
18: #define MAX_COLS 500
19: #define MAX_IN_LOBS 5
20: #define MAX_LOB_NAME_LENGTH 100
21: #define MAX_OUT_STRING_LENGTH 4000
22:
23: #define EMPTY_CLOB_FUNC_CALL "empty_clob()"
24:
25: #include "ltdl.h"
26:
27: #define MAX_STRING 0x400
28: #define MAX_NUMBER 20
29:
30: #if _MSC_VER
31: # define snprintf _snprintf
32: # define strcasecmp _stricmp
33: # define strncasecmp _strnicmp
34: #endif
35:
36: #ifndef max
37: inline int max(int a, int b) { return a>b?a:b; }
38: inline int min(int a, int b){ return a<b?a:b; }
39: #endif
40:
1.5 ! paf 41: /// @test setenv version memory. maybe key/value needs ::malloc?
1.4 paf 42: static int pa_setenv(const char *name, const char *value) {
43: #ifdef HAVE_PUTENV
44: // MEM_LEAK_HERE. refer to EOF man putenv
45: char *buf=(char *)::malloc(strlen(name)+1+strlen(value)+1);
46: strcpy(buf, name);
47: strcat(buf, "=");
48: strcat(buf, value);
1.5 ! paf 49: /*
! 50: if(FILE *f=fopen("f", "at")) {
! 51: fprintf(f, "****************************%s\n", buf);
! 52: // for (char **env = environ; env != NULL && *env != NULL; env++)
! 53: // fputs(*env, f);
! 54:
! 55: fclose(f);
! 56: }
! 57: */
1.4 paf 58: return putenv(buf);
59: #else
60: //#ifdef HAVE_SETENV
61: if(value)
62: return setenv(name, value, 1/*overwrite*/);
63: else {
64: unsetenv(name);
65: return 0;
66: }
67: #endif
68: }
69:
1.1 parser 70: static char *lsplit(char *string, char delim) {
71: if(string) {
72: char *v=strchr(string, delim);
73: if(v) {
74: *v=0;
75: return v+1;
76: }
77: }
78: return 0;
79: }
80:
1.4 paf 81: static char *lsplit(char **string_ref, char delim) {
82: char *result=*string_ref;
83: char *next=lsplit(*string_ref, delim);
84: *string_ref=next;
85: return result;
86: }
87:
1.5 ! paf 88: static const char *pa_setenv(char *options) {
! 89: while(options) {
! 90: if(char *key=lsplit(&options, '&')) {
! 91: if(*key) {
! 92: if(char *value=lsplit(key, '=')) {
! 93: if(strncmp(key, "ORACLE_", 7)==0 // ORACLE_HOME & co
! 94: || strncmp(key, "ORA_", 4)==0 // ORA_ENCRYPT_LOGIN & co
! 95: || strncmp(key, "NLS_", 4)==0 // NLS_LANG & co
! 96: ) {
! 97: if(pa_setenv(key, value)!=0)
! 98: return "problem changing process environment" /*key*/;
! 99: } else
! 100: return "unknown connect option (option must start with ORACLE_, ORA_ or NLS_)" /*key*/;
! 101: } else
! 102: return "connect option without =value" /*key*/;
! 103: }
! 104: }
! 105: }
! 106: return 0;
! 107: }
! 108:
1.1 parser 109: #ifndef DOXYGEN
110: struct OracleSQL_connection_struct {
111: jmp_buf mark; char error[MAX_STRING];
112: OCIEnv *envhp;
113: OCIServer *srvhp;
114: OCIError *errhp;
115: OCISvcCtx *svchp;
116: OCISession *usrhp;
117: };
118:
119: struct OracleSQL_query_lobs {
120: struct return_rows {
121: struct return_row {
122: OCILobLocator *locator; ub4 len;
123: int ind;
124: ub2 rcode;
125: } *row;
126: int count;
127: };
128: struct cbf_context_struct {
129: SQL_Driver_services *services;
130: OracleSQL_connection_struct *cs;
131: return_rows *rows;
132: };
133: struct Item {
134: const char *name_ptr; size_t name_size;
135: char *data_ptr; size_t data_size;
136: OCILobLocator *locator;
137: OCIBind *bind;
138: return_rows rows;
139: } items[MAX_IN_LOBS];
140: int count;
141: };
142: #endif
143:
144: // forwards
145: void check(
146: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
147: const char *step, sword status);
148: static sb4 cbf_no_data(
149: dvoid *ctxp,
150: OCIBind *bindp,
151: ub4 iter, ub4 index,
152: dvoid **bufpp,
153: ub4 *alenpp,
154: ub1 *piecep,
155: dvoid **indpp);
156: static sb4 cbf_get_data(dvoid *ctxp,
157: OCIBind *bindp,
158: ub4 iter, ub4 index,
159: dvoid **bufpp,
160: ub4 **alenp,
161: ub1 *piecep,
162: dvoid **indpp,
163: ub2 **rcodepp);
164: void tolower(char *out, const char *in, size_t size);
165:
166: /**
167: OracleSQL server driver
168: @test NLS_LANG=AMERICAN_AMERICA.CL8MSWIN1251
169: */
170: class OracleSQL_Driver : public SQL_Driver {
171: public:
172:
173: OracleSQL_Driver() : SQL_Driver() {
174: }
175:
176: /// get api version
177: int api_version() { return SQL_DRIVER_API_VERSION; }
178: /// initialize driver by loading sql dynamic link library
1.5 ! paf 179: const char *initialize(char *dlopen_file_spec) {
! 180: char *options=lsplit(dlopen_file_spec, '?');
1.1 parser 181:
182: const char *error=dlopen_file_spec?
183: dlink(dlopen_file_spec):"client library column is empty";
184: if(!error) {
1.5 ! paf 185: error=pa_setenv(options);
1.1 parser 186:
1.5 ! paf 187: if(!error)
! 188: OCIInitialize((ub4)OCI_THREADED/*| OCI_OBJECT*/, (dvoid *)0,
! 189: (dvoid * (*)(void *, unsigned int))0,
! 190: (dvoid * (*)(void*, void*, unsigned int))0,
! 191: (void (*)(void*, void*))0
! 192: );
1.1 parser 193: }
194:
195: return error;
196: }
197:
198: /** connect
199: @param used_only_in_connect_url
1.4 paf 200: format: @b user:pass@service?
201: ORACLE_HOME=/u01/app/oracle/product/8.1.5&
1.5 ! paf 202: ORA_NLS33=/u01/app/oracle/product/8.1.5/ocommon/nls/admin/data&
1.4 paf 203: NLS_LANG=RUSSIAN_AMERICA.CL8MSWIN1251&
204: ORA_ENCRYPT_LOGIN=TRUE
205:
206: @todo environment manupulation doesnt look thread safe
1.1 parser 207: */
208: void connect(
209: char *used_only_in_connect_url,
210: SQL_Driver_services& services,
211: void **connection ///< output: OracleSQL_connection_struct *
212: ) {
213: // connections are cross-request, do not use services._alloc [linked with request]
214: OracleSQL_connection_struct &cs=
215: *(OracleSQL_connection_struct *)::calloc(sizeof(OracleSQL_connection_struct), 1);
216:
217: char *user=used_only_in_connect_url;
218: char *service=lsplit(user, '@');
219: char *pwd=lsplit(user, ':');
1.4 paf 220: char *options=lsplit(service, '?');
1.1 parser 221:
222: if(!(user && pwd && service))
223: services._throw("mailformed connect part, must be 'user:pass@service'");
224:
1.5 ! paf 225: if(const char *error=pa_setenv(options))
! 226: services._throw(error);
1.4 paf 227:
1.1 parser 228: if(setjmp(cs.mark))
229: services._throw(cs.error);
230:
231: // Allocate and initialize OCIError handle, attempt #1
232: /*
233: grabbed from sample
234: /server.804/a58234/oci_func.htm#446192
235: but doc
236: /server.804/a58234/oci_func.htm#446100
237: doesnt have this param listed as allowed
238: 8.1.6 client library barks as OCI_INVALID_HANDLE
239: and debugging revealed that OCI_HTYPE_ENV param value is invalid
240: later in doc
241: /server.804/a58234/oci_func.htm#446192
242: on OCIEnvInit thay say
243: "No changes are done to an already initialized handle"
244: think, this is some sort of backward compatibility wonder.
245: leaving as it is, and without check()
246: */
247: OCIHandleAlloc((dvoid *)NULL, (dvoid **) &cs.envhp, (ub4)OCI_HTYPE_ENV, 0, 0);
248: // Initialize an environment handle, attempt #2
249: check(services, cs, "EnvInit", OCIEnvInit(
250: &cs.envhp, (ub4)OCI_DEFAULT, 0, 0));
251: // Allocate and initialize OCIError handle
252: check(services, cs, "HandleAlloc errhp", OCIHandleAlloc(
253: (dvoid *)cs.envhp, (dvoid **) &cs.errhp, (ub4)OCI_HTYPE_ERROR, 0, 0));
254: // Allocate and initialize OCIServer handle
255: check(services, cs, "HandleAlloc srvhp", OCIHandleAlloc(
256: (dvoid *)cs.envhp, (dvoid **) &cs.srvhp, (ub4)OCI_HTYPE_SERVER, 0, 0));
257: // Attach to a 'service'; initialize server context handle
258: check(services, cs, "ServerAttach", OCIServerAttach(
259: cs.srvhp, cs.errhp, (text *)service, (sb4)strlen(service), (ub4)OCI_DEFAULT));
260: // Allocate and initialize OCISvcCtx handle
261: check(services, cs, "HandleAlloc svchp", OCIHandleAlloc(
262: (dvoid *)cs.envhp, (dvoid **) &cs.svchp, (ub4)OCI_HTYPE_SVCCTX, 0, 0));
263: // set attribute server context in the service context
264: check(services, cs, "AttrSet server-service", OCIAttrSet(
265: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
266: (dvoid *)cs.srvhp, (ub4)0,
267: (ub4)OCI_ATTR_SERVER, (OCIError *)cs.errhp));
268: // allocate a user context handle
269: check(services, cs, "HandleAlloc usrhp", OCIHandleAlloc(
270: (dvoid *)cs.envhp, (dvoid **)&cs.usrhp, (ub4)OCI_HTYPE_SESSION, 0, 0));
271: // set 'user' name
272: check(services, cs, "AttrSet user-session", OCIAttrSet(
273: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
274: (dvoid *)user, (ub4)strlen(user),
275: OCI_ATTR_USERNAME, cs.errhp));
276: // set 'pwd' password
277: check(services, cs, "AttrSet pwd-session", OCIAttrSet(
278: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
279: (dvoid *)pwd, (ub4)strlen(pwd),
280: OCI_ATTR_PASSWORD, cs.errhp));
281: // Authenticate a user
282: check(services, cs, "SessionBegin", OCISessionBegin(
283: cs.svchp, cs.errhp, cs.usrhp,
284: OCI_CRED_RDBMS, OCI_DEFAULT));
285: // remember connection in session
286: check(services, cs, "AttrSet service-session", OCIAttrSet(
287: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
288: (dvoid *)cs.usrhp, (ub4)0,
289: OCI_ATTR_SESSION, cs.errhp));
290:
291: // return created connection
292: *(OracleSQL_connection_struct **)connection=&cs;
293: }
1.2 paf 294: /// @test remove return
1.1 parser 295: void disconnect(void *connection) {
296:
297: return;
298:
299:
300: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
301: // Terminate a user session
302: OCISessionEnd(
303: cs.svchp, cs.errhp, cs.usrhp, (ub4)OCI_DEFAULT);
304: // Detach from a server; uninitialize server context handle
305: OCIServerDetach(
306: cs.srvhp, cs.errhp, (ub4)OCI_DEFAULT);
307: // Free a previously allocated handles
308: /*
309: oci will free them up as belonging to env
310: OCIHandleFree(
311: (dvoid *)cs.srvhp, (ub4)OCI_HTYPE_SERVER);
312: OCIHandleFree(
313: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX);
314: OCIHandleFree(
315: (dvoid *)cs.errhp, (ub4)OCI_HTYPE_ERROR);
316: */
317: OCIHandleFree(
318: (dvoid *)cs.envhp, (ub4)OCI_HTYPE_ENV);
319:
320: // connections are cross-request, do not use services._alloc [linked with request]
321: ::free(&cs);
322: }
323: void commit(SQL_Driver_services& services, void *connection) {
324: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
325: if(setjmp(cs.mark))
326: services._throw(cs.error);
327:
328: check(services, cs, "commit", OCITransCommit(cs.svchp, cs.errhp, 0));
329: }
330: void rollback(SQL_Driver_services& services, void *connection) {
331: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
332: if(setjmp(cs.mark))
333: services._throw(cs.error);
334:
335: check(services, cs, "rollback", OCITransRollback(cs.svchp, cs.errhp, 0));
336: }
337:
338: bool ping(SQL_Driver_services&, void *connection) {
339: // maybe OCIServerVersion?
1.4 paf 340: // select 0 from dual
1.1 parser 341: return true;
342: }
343:
344: unsigned int quote(
345: SQL_Driver_services&, void *,
346: char *to, const char *from, unsigned int length) {
347: /*
348: it's already UNTAINT_TIMES_BIGGER
349: */
350: unsigned int result=length;
351: while(length--) {
352: switch(*from) {
353: case '\'': // "'" -> "''"
354: *to++='\'';
355: break;
356: case '\\': // "\" -> "\\"
357: *to++='\'';
358: break;
359: }
360: *to++=*from++;
361: }
362: return result;
363: }
364: void query(
365: SQL_Driver_services& services, void *connection,
366: const char *astatement, unsigned long offset, unsigned long limit,
367: SQL_Driver_query_event_handlers& handlers) {
368:
369: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
370: OracleSQL_query_lobs lobs={{0}, 0};
371: OCIStmt *stmthp=0;
372:
373: bool failed=false;
374: if(setjmp(cs.mark)) {
375: failed=true;
376: goto cleanup;
377: } else {
378: const char *statement=preprocess_statement(services, cs,
379: astatement, lobs);
380:
381: check(services, cs, "HandleAlloc STMT", OCIHandleAlloc(
382: (dvoid *)cs.envhp, (dvoid **) &stmthp, (ub4)OCI_HTYPE_STMT, 0, 0));
383: check(services, cs, "syntax",
384: OCIStmtPrepare(stmthp, cs.errhp, (unsigned char *)statement,
385: (ub4)strlen((char *)statement),
386: (ub4)OCI_NTV_SYNTAX, (ub4)OCI_DEFAULT));
387: {
388: for(int i=0; i<lobs.count; i++) {
389: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
390: (dvoid *)cs.envhp, (dvoid **)&lobs.items[i].locator, (ub4)OCI_DTYPE_LOB, 0, 0));
391:
392: check(services, cs, "bind output", OCIBindByPos(stmthp,
393: &lobs.items[i].bind, cs.errhp,
394: (ub4)1+i,
395: (dvoid *)&lobs.items[i].locator,
396: (sword)sizeof (lobs.items[i].locator), SQLT_CLOB, (dvoid *)0,
397: (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, OCI_DATA_AT_EXEC));
398:
399: lobs.items[i].rows.count=0;
400: OracleSQL_query_lobs::cbf_context_struct cbf_context={
401: &services, &cs, &lobs.items[i].rows};
402: check(services, cs, "bind dynamic", OCIBindDynamic(
403: lobs.items[i].bind, cs.errhp,
404: (dvoid *) &cbf_context, cbf_no_data,
405: (dvoid *) &cbf_context, cbf_get_data));
406: }
407: }
408:
409: execute_prepared(services, cs,
410: statement, stmthp, lobs,
411: offset, limit, handlers);
412: }
413: cleanup: // no check call after this point!
414: {
415: for(int i=0; i<lobs.count; i++) {
416: /* free var locator */
417: if(OCILobLocator *locator=lobs.items[i].locator)
418: OCIDescriptorFree((dvoid *)locator, (ub4)OCI_DTYPE_LOB);
419:
420: /* free rows descriptors */
421: OracleSQL_query_lobs::return_rows &rows=lobs.items[i].rows;
422: for(int r=0; r<rows.count; r++)
423: OCIDescriptorFree((dvoid *)rows.row[r].locator, (ub4)OCI_DTYPE_LOB);
424: }
425: }
426: if(stmthp)
427: OCIHandleFree((dvoid *)stmthp, (ub4)OCI_HTYPE_STMT);
428:
429: if(failed)
430: services._throw(cs.error);
431: }
432:
433: private: // private funcs
434:
435: const char *preprocess_statement(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
436: const char *astatement, OracleSQL_query_lobs &lobs) {
437: size_t statement_size=strlen(astatement);
438:
439: char *result=(char *)services.malloc(statement_size
440: +MAX_STRING // in case of short 'strings'
441: +11/* returning */+6/* into */+(MAX_LOB_NAME_LENGTH+2/*:, */)*2/*ret into*/*MAX_IN_LOBS
442: +1);
443: const char *o=astatement;
444:
445: // /**xxx**/'literal' -> EMPTY_CLOB_FUNC_CALL
446: char *n=result;
447: while(*o) {
448: if(
449: o[0]=='/' &&
450: o[1]=='*' &&
451: o[2]=='*') { // name start
452: o+=3;
453: const char *name_begin=o;
454: while(*o)
455: if(
456: o[0]=='*' &&
457: o[1]=='*' &&
458: o[2]=='/' &&
459: o[3]=='\'') { // name end
460: const char *name_end=o;
461: o+=4;
462: OracleSQL_query_lobs::Item &item=lobs.items[lobs.count++];
463: item.name_ptr=name_begin; item.name_size=name_end-name_begin;
464: item.data_ptr=(char *)services.malloc(statement_size/*max*/); item.data_size=0;
465:
466: const char *start=o;
467: bool escaped=false;
468: while(*o && !(o[0]=='\'' && o[1]!='\'' && !escaped)) {
469: escaped=*o=='\\' || (o[0]=='\'' && o[1]=='\'');
470: if(escaped) {
471: // write pending, skip "\" or "'"
472: if(size_t size=o-start) {
473: memcpy(item.data_ptr+item.data_size, start, size);
474: item.data_size+=size;
475: }
476: start=++o;
477: } else
478: o++;
479: }
480: if(size_t size=o-start) {
481: memcpy(item.data_ptr+item.data_size, start, size);
482: item.data_size+=size;
483: }
484: if(*o)
485: o++; // skip "'"
486:
487: n+=sprintf(n, EMPTY_CLOB_FUNC_CALL);
488: break;
489: } else
490: o++; // /**skip**/'xxx'
491: } else
492: *n++=*o++;
493: }
494: *n=0;
495:
496: if(lobs.count) {
497: int i;
498: n+=sprintf(n, " returning ");
499: for(i=0; i<lobs.count; i++) {
500: if(i)
501: *n++=',';
502: n+=sprintf(n, "%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
503: /*memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
504: n+=lobs.items[i].name_size;*/
505: }
506: n+=sprintf(n, " into ");
507: for(i=0; i<lobs.count; i++) {
508: if(i)
509: *n++='x';
510: n+=sprintf(n, ":%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
511: /**n++=':';
512: memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
513: n+=lobs.items[i].name_size;*/
514: }
515: }
516:
517: return result;
518: }
519:
520: void execute_prepared(
521: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
522: const char *statement, OCIStmt *stmthp, OracleSQL_query_lobs &lobs,
523: unsigned long offset, unsigned long limit,
524: SQL_Driver_query_event_handlers& handlers) {
525:
526: ub2 stmt_type=0; // UNKNOWN
527: /*
528: //gpfs on sun. paf 000818
529: //Zanyway, this is needed before.
530: check(services, cs, "get stmt type", OCIAttrGet(
531: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT, (ub1 *)&stmt_type,
532: (ub4 *)0, OCI_ATTR_STMT_TYPE, cs.errhp));
533: */
534: if(strncasecmp(statement, "select", 6)==0)
535: stmt_type=OCI_STMT_SELECT;
536: else if(strncasecmp(statement, "insert", 6)==0)
537: stmt_type=OCI_STMT_INSERT;
538: else if(strncasecmp(statement, "update", 6)==0)
539: stmt_type=OCI_STMT_UPDATE;
540:
541: sword status=OCIStmtExecute(cs.svchp, stmthp, cs.errhp,
542: (ub4)stmt_type==OCI_STMT_SELECT?0:1, (ub4)0,
543: (OCISnapshot *)NULL,
544: (OCISnapshot *)NULL, (ub4)OCI_DEFAULT);
545:
546: if(status!=OCI_NO_DATA)
547: check(services, cs, "execute", status);
548:
549: {
550: for(int i=0; i<lobs.count; i++)
551: if(ub4 bytes_to_write=lobs.items[i].data_size) {
552: OracleSQL_query_lobs::return_rows *rows=&lobs.items[i].rows;
553: for(int r=0; r<rows->count; r++) {
554: OCILobLocator *locator=rows->row[r].locator;
555: check(services, cs, "lobwrite", OCILobWrite (
556: cs.svchp, cs.errhp,
557: locator, &bytes_to_write, 1,
558: (dvoid *)lobs.items[i].data_ptr, (ub4)bytes_to_write, OCI_ONE_PIECE,
559: (dvoid *)0, 0, (ub2)0,
560: (ub1) SQLCS_IMPLICIT));
561: }
562: }
563: }
564:
565: switch(stmt_type) {
566: case OCI_STMT_SELECT:
567: fetch_table(services, cs,
568: stmthp, offset, limit,
569: handlers);
570: break;
571: default:
572: /*
573: case OCI_STMT_INSERT:
574: case OCI_STMT_UPDATE:
575: */
576: break;
577: }
578: }
579:
580: void fetch_table(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
581: OCIStmt *stmthp, unsigned long offset, unsigned long limit,
582: SQL_Driver_query_event_handlers& handlers) {
583:
584: OCIParam *mypard;
585: ub2 dtype;
586: text *col_name;
587:
588: struct {
589: ub2 type;
590: char *str;
591: OCILobLocator *var;
592: OCIDefine *def;
593: sb2 indicator;
594: } cols[MAX_COLS]={0};
595: int column_count=0;
596:
597: bool failed=false;
598: jmp_buf saved_mark; memcpy(saved_mark, cs.mark, sizeof(jmp_buf));
599: if(setjmp(cs.mark)) {
600: failed=true;
601: goto cleanup;
602: } else {
603: // idea of preincrementing is that at error time all handles would free up
604: while(++column_count<=MAX_COLS) {
605: /* get next descriptor, if there is one */
606: if(OCIParamGet(stmthp, OCI_HTYPE_STMT, cs.errhp, (void **)&mypard,
1.3 paf 607: (ub4) column_count)!=OCI_SUCCESS) {
608: --column_count;
1.1 parser 609: break;
1.3 paf 610: }
1.1 parser 611:
612: /* Retrieve the data type attribute */
613: check(services, cs, "get type", OCIAttrGet(
614: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
615: (dvoid*) &dtype, (ub4 *)0, (ub4)OCI_ATTR_DATA_TYPE,
616: (OCIError *)cs.errhp));
617:
618: /* Retrieve the column name attribute */
619: ub4 col_name_len;
620: check(services, cs, "get name", OCIAttrGet(
621: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
622: (dvoid**) &col_name, (ub4 *) &col_name_len, (ub4)OCI_ATTR_NAME,
623: (OCIError *)cs.errhp));
624:
625: {
626: size_t size=(size_t)col_name_len;
627: char *ptr=(char *)services.malloc(size);
628: tolower(ptr, (char *)col_name, size);
629: handlers.add_column(ptr, size);
630: }
631:
632: ub2 coerce_type=dtype;
633: sb4 size=0;
634: void *ptr;
635:
636: switch(dtype) {
637: case SQLT_CLOB:
638: {
639: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
640: (dvoid *)cs.envhp, (dvoid **)(ptr=&cols[column_count-1].var),
641: (ub4)OCI_DTYPE_LOB,
642: 0, (dvoid **)0));
643:
644: size=0;
645: break;
646: }
647: default:
648: coerce_type=SQLT_STR;
649: ptr=cols[column_count-1].str=(char *)services.malloc(MAX_OUT_STRING_LENGTH+1);
650: size=MAX_OUT_STRING_LENGTH;
651: break;
652: }
653:
654: cols[column_count-1].type=coerce_type;
655:
656: check(services, cs, "DefineByPos", OCIDefineByPos(
657: stmthp, &cols[column_count-1].def, cs.errhp,
658: column_count, (ub1 *) ptr, size,
659: coerce_type, (dvoid *) &cols[column_count-1].indicator,
660: (ub2 *)0, (ub2 *)0, OCI_DEFAULT));
661: }
662:
663: handlers.before_rows();
664:
665: for(unsigned long row=0; !limit||row<limit+offset; row++) {
666: sword status=OCIStmtFetch(stmthp, cs.errhp, (ub4)1, (ub4)OCI_FETCH_NEXT,
667: (ub4)OCI_DEFAULT);
1.3 paf 668: if(status==OCI_NO_DATA)
1.1 parser 669: break;
1.3 paf 670: check(services, cs, "fetch", status);
671:
1.1 parser 672: if(row>=offset) {
673: handlers.add_row();
674: for(int i=0; i<column_count; i++) {
675: size_t size;
676: void *ptr;
677: if(cols[i].indicator) { // NULL?
678: size=0;
679: ptr=0;
680: } else // not NULL
681: switch(cols[i].type) {
682: case SQLT_CLOB:
683: {
684: ub4 amtp=4096000000UL;
685: ub4 offset=1;
686: ub4 loblen=0;
687: OCILobLocator *var=(OCILobLocator *)cols[i].var;
688: OCILobGetLength(cs.svchp, cs.errhp, var, &loblen);
689: if(loblen) {
690: size=(size_t)loblen;
691: ptr=services.malloc(size);
692: check(services, cs, "lobread", OCILobRead(cs.svchp, cs.errhp,
693: var, &amtp, offset, (dvoid *) ptr,
694: loblen, (dvoid *)0,
695: 0,
696: (ub2)0, (ub1) SQLCS_IMPLICIT));
697: }
698: break;
699: }
700: default:
701: if(const char *str=cols[i].str) {
702: size=strlen(str);
703: ptr=services.malloc(size);
704: memcpy(ptr, str, size);
705: } else {
706: size=0;
707: ptr=0;
708: }
709: break;
710: }
711: handlers.add_row_cell(ptr, size);
712: }
713: }
714: }
715: }
716:
717: cleanup: // no check call after this point!
718: for(int i=0; i<column_count; i++) {
719: switch(cols[i].type) {
720: case SQLT_CLOB:
721: /* free var locator */
722: OCIDescriptorFree((dvoid *) cols[i].var, (ub4)OCI_DTYPE_LOB);
723: break;
724: default:
725: break;
726: }
727: }
728:
729: if(failed) // need rethrow?
730: longjmp(saved_mark, 1);
731: }
732:
733: private: // conn client library funcs
734:
735: friend void check(
736: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
737: const char *step, sword status);
738: friend sb4 cbf_get_data(dvoid *ctxp,
739: OCIBind *bindp,
740: ub4 iter, ub4 index,
741: dvoid **bufpp,
742: ub4 **alenp,
743: ub1 *piecep,
744: dvoid **indpp,
745: ub2 **rcodepp);
746:
747:
748: #define OCI_DECL(name, params) \
749: typedef sword (*t_OCI##name)params; t_OCI##name OCI##name
750:
751: OCI_DECL(Initialize, (ub4 mode, dvoid *ctxp,
752: dvoid * (*malocfp)(dvoid *ctxp, size_t size),
753: dvoid * (*ralocfp)(dvoid *ctxp, dvoid *memptr, size_t newsize),
754: void (*mfreefp)(dvoid *ctxp, dvoid *memptr) ));
755:
756: OCI_DECL(EnvInit, (OCIEnv **envp, ub4 mode,
757: size_t xtramem_sz, dvoid **usrmempp));
758:
759: OCI_DECL(AttrGet, (CONST dvoid *trgthndlp, ub4 trghndltyp,
760: dvoid *attributep, ub4 *sizep, ub4 attrtype,
761: OCIError *errhp));
762:
763: OCI_DECL(AttrSet, (dvoid *trgthndlp, ub4 trghndltyp, dvoid *attributep,
764: ub4 size, ub4 attrtype, OCIError *errhp));
765:
766: OCI_DECL(BindByPos, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
767: ub4 position, dvoid *valuep, sb4 value_sz,
768: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
769: ub4 maxarr_len, ub4 *curelep, ub4 mode));
770:
771: OCI_DECL(BindDynamic, (OCIBind *bindp, OCIError *errhp, dvoid *ictxp,
772: OCICallbackInBind icbfp, dvoid *octxp,
773: OCICallbackOutBind ocbfp));
774:
775: OCI_DECL(DefineByPos, (OCIStmt *stmtp, OCIDefine **defnp, OCIError *errhp,
776: ub4 position, dvoid *valuep, sb4 value_sz, ub2 dty,
777: dvoid *indp, ub2 *rlenp, ub2 *rcodep, ub4 mode));
778:
779: OCI_DECL(DescriptorAlloc, (CONST dvoid *parenth, dvoid **descpp,
780: CONST ub4 type, CONST size_t xtramem_sz,
781: dvoid **usrmempp));
782:
783: OCI_DECL(DescriptorFree, (dvoid *descp, CONST ub4 type));
784:
785:
786: OCI_DECL(ErrorGet, (dvoid *hndlp, ub4 recordno, OraText *sqlstate,
787: sb4 *errcodep, OraText *bufp, ub4 bufsiz, ub4 type));
788:
789: OCI_DECL(HandleAlloc, (CONST dvoid *parenth, dvoid **hndlpp, CONST ub4 type,
790: CONST size_t xtramem_sz, dvoid **usrmempp));
791:
792: OCI_DECL(HandleFree, (dvoid *hndlp, CONST ub4 type));
793:
794: OCI_DECL(LobGetLength, (OCISvcCtx *svchp, OCIError *errhp,
795: OCILobLocator *locp,
796: ub4 *lenp));
797:
798: OCI_DECL(LobRead, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
799: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 bufl,
800: dvoid *ctxp, sb4 (*cbfp)(dvoid *ctxp,
801: CONST dvoid *bufp,
802: ub4 len,
803: ub1 piece),
804: ub2 csid, ub1 csfrm));
805:
806: OCI_DECL(LobWrite, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
807: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 buflen,
808: ub1 piece, dvoid *ctxp,
809: sb4 (*cbfp)(dvoid *ctxp,
810: dvoid *bufp,
811: ub4 *len,
812: ub1 *piece),
813: ub2 csid, ub1 csfrm));
814:
815: OCI_DECL(ParamGet, (CONST dvoid *hndlp, ub4 htype, OCIError *errhp,
816: dvoid **parmdpp, ub4 pos));
817:
818: OCI_DECL(ServerAttach, (OCIServer *srvhp, OCIError *errhp,
819: CONST OraText *dblink, sb4 dblink_len, ub4 mode));
820:
821: OCI_DECL(ServerDetach, (OCIServer *srvhp, OCIError *errhp, ub4 mode));
822:
823: OCI_DECL(SessionBegin, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
824: ub4 credt, ub4 mode));
825:
826: OCI_DECL(SessionEnd, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
827: ub4 mode));
828:
829: OCI_DECL(StmtExecute, (OCISvcCtx *svchp, OCIStmt *stmtp, OCIError *errhp,
830: ub4 iters, ub4 rowoff, CONST OCISnapshot *snap_in,
831: OCISnapshot *snap_out, ub4 mode));
832:
833: OCI_DECL(StmtFetch, (OCIStmt *stmtp, OCIError *errhp, ub4 nrows,
834: ub2 orientation, ub4 mode));
835:
836: OCI_DECL(StmtPrepare, (OCIStmt *stmtp, OCIError *errhp, CONST OraText *stmt,
837: ub4 stmt_len, ub4 language, ub4 mode));
838:
839: OCI_DECL(TransCommit, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
840:
841: OCI_DECL(TransRollback, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
842:
843: private: // conn client library funcs linking
844:
845: const char *dlink(const char *dlopen_file_spec) {
846: if(lt_dlinit())
847:
848: return lt_dlerror();
849:
850:
851:
852: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
853:
854: //return "hren31";
855:
856: if(!handle)
857: return lt_dlerror(); //"can not open the dynamic link module";
858:
859: #define DSLINK(name, action) \
860: name=(t_##name)lt_dlsym(handle, #name); \
861: if(!name) \
862: action;
863:
864: #define OCI_LINK(name) DSLINK(OCI##name, return "function OCI" #name " was not found")
865:
866: OCI_LINK(Initialize);
867: OCI_LINK(EnvInit);
868: OCI_LINK(AttrGet); OCI_LINK(AttrSet);
869: OCI_LINK(BindByPos); OCI_LINK(BindDynamic);
870: OCI_LINK(DefineByPos);
871: OCI_LINK(DescriptorAlloc); OCI_LINK(DescriptorFree);
872: OCI_LINK(ErrorGet);
873: OCI_LINK(HandleAlloc); OCI_LINK(HandleFree);
874: OCI_LINK(LobGetLength);
875: OCI_LINK(LobRead); OCI_LINK(LobWrite);
876: OCI_LINK(ParamGet);
877: OCI_LINK(ServerAttach); OCI_LINK(ServerDetach);
878: OCI_LINK(SessionBegin); OCI_LINK(SessionEnd);
879: OCI_LINK(StmtExecute); OCI_LINK(StmtFetch); OCI_LINK(StmtPrepare);
880: OCI_LINK(TransCommit); OCI_LINK(TransRollback);
881:
882: return 0;
883: }
884:
885: } *OracleSQL_driver;
886:
887: void check(
888: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
889: const char *step, sword status) {
890:
891: const char *msg;
892: char reason[MAX_STRING/2];
893:
894: switch (status) {
895: case OCI_SUCCESS:
896: return; // hurrah
897: case OCI_ERROR:
898: {
899: sb4 errcode;
900: if(OracleSQL_driver->OCIErrorGet((dvoid *)cs.errhp, (ub4)1, (text *)NULL, &errcode,
901: (text *)reason, (ub4)sizeof(reason), OCI_HTYPE_ERROR)==OCI_SUCCESS)
902: msg=reason;
903: else
904: msg="[can not get error description]";
905: break;
906: }
907: case OCI_SUCCESS_WITH_INFO:
908: msg="SUCCESS_WITH_INFO"; break;
909: case OCI_NEED_DATA:
910: msg="NEED_DATA"; break;
911: case OCI_NO_DATA:
912: msg="NODATA"; break;
913: case OCI_INVALID_HANDLE:
914: msg="INVALID_HANDLE"; break;
915: case OCI_STILL_EXECUTING:
916: msg="STILL_EXECUTE"; break;
917: case OCI_CONTINUE:
918: msg="CONTINUE"; break;
919: default:
920: msg="unknown"; break;
921: }
922:
923: snprintf(cs.error, sizeof(cs.error), "%s (%s, %d)",
924: msg, step, (int)status);
925: longjmp(cs.mark, 1);
926: }
927:
928:
929: /* ----------------------------------------------------------------- */
930: /* Intbind callback that does not do any data input. */
931: /* ----------------------------------------------------------------- */
932: static sb4 cbf_no_data(
933: dvoid *ctxp,
934: OCIBind *bindp,
935: ub4 iter, ub4 index,
936: dvoid **bufpp,
937: ub4 *alenpp,
938: ub1 *piecep,
939: dvoid **indpp) {
940: *bufpp=(dvoid *)0;
941: *alenpp=0;
942: static sb2 null_ind=-1;
943: *indpp=(dvoid *) &null_ind;
944: *piecep=OCI_ONE_PIECE;
945:
946: return OCI_CONTINUE;
947: }
948:
949: /* ----------------------------------------------------------------- */
950: /* Outbind callback for returning data. */
951: /* ----------------------------------------------------------------- */
952: static sb4 cbf_get_data(dvoid *ctxp,
953: OCIBind *bindp,
954: ub4 iter, ub4 index,
955: dvoid **bufpp,
956: ub4 **alenp,
957: ub1 *piecep,
958: dvoid **indpp,
959: ub2 **rcodepp) {
960: OracleSQL_query_lobs::cbf_context_struct &context=
961: *(OracleSQL_query_lobs::cbf_context_struct *)ctxp;
962:
963: if(index==0) {
964: static ub4 rows;
965: check(*context.services, *context.cs, "AttrGet cbf_get_data ROWS_RETURNED",
966: OracleSQL_driver->OCIAttrGet(
967: (CONST dvoid *) bindp, OCI_HTYPE_BIND, (dvoid *)&rows,
968: (ub4 *)sizeof(ub2), OCI_ATTR_ROWS_RETURNED, context.cs->errhp)) ;
969: context.rows->count=(ub2)rows;
970: context.rows->row=(OracleSQL_query_lobs::return_rows::return_row *)
971: context.services->malloc(sizeof(OracleSQL_query_lobs::return_rows::return_row)*rows);
972: }
973:
974: OracleSQL_query_lobs::return_rows::return_row &var=context.rows->row[index];
975:
976: check(*context.services, *context.cs, "alloc output var desc dynamic", OracleSQL_driver->OCIDescriptorAlloc(
977: (dvoid *) context.cs->envhp, (dvoid **)&var.locator,
978: (ub4)OCI_DTYPE_LOB,
979: 0, (dvoid **)0));
980:
981: *bufpp=var.locator;
982: *alenp=&var.len;
983: *indpp=(dvoid *) &var.ind;
984: *piecep=OCI_ONE_PIECE;
985: *rcodepp=&var.rcode;
986:
987: return OCI_CONTINUE;
988: }
989:
990: void tolower(char *out, const char *in, size_t size) {
991: while(size--)
992: *out++=tolower(*in++);
993: }
994:
995: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
996: //_asm int 3;
997: return OracleSQL_driver=new OracleSQL_Driver();
998: }