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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: */
10: static const char *RCSId="$Id: parser3oracle.C,v 1.19 2001/09/14 15:41:59 parser Exp $";
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:
41: static char *lsplit(char *string, char delim) {
42: if(string) {
43: char *v=strchr(string, delim);
44: if(v) {
45: *v=0;
46: return v+1;
47: }
48: }
49: return 0;
50: }
51:
52: #ifndef DOXYGEN
53: struct OracleSQL_connection_struct {
54: jmp_buf mark; char error[MAX_STRING];
55: OCIEnv *envhp;
56: OCIServer *srvhp;
57: OCIError *errhp;
58: OCISvcCtx *svchp;
59: OCISession *usrhp;
60: };
61:
62: struct OracleSQL_query_lobs {
63: struct return_rows {
64: struct return_row {
65: OCILobLocator *locator; ub4 len;
66: int ind;
67: ub2 rcode;
68: } *row;
69: int count;
70: };
71: struct cbf_context_struct {
72: SQL_Driver_services *services;
73: OracleSQL_connection_struct *cs;
74: return_rows *rows;
75: };
76: struct Item {
77: const char *name_ptr; size_t name_size;
78: char *data_ptr; size_t data_size;
79: OCILobLocator *locator;
80: OCIBind *bind;
81: return_rows rows;
82: } items[MAX_IN_LOBS];
83: int count;
84: };
85: #endif
86:
87: // forwards
88: void check(
89: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
90: const char *step, sword status);
91: static sb4 cbf_no_data(
92: dvoid *ctxp,
93: OCIBind *bindp,
94: ub4 iter, ub4 index,
95: dvoid **bufpp,
96: ub4 *alenpp,
97: ub1 *piecep,
98: dvoid **indpp);
99: static sb4 cbf_get_data(dvoid *ctxp,
100: OCIBind *bindp,
101: ub4 iter, ub4 index,
102: dvoid **bufpp,
103: ub4 **alenp,
104: ub1 *piecep,
105: dvoid **indpp,
106: ub2 **rcodepp);
107: void tolower(char *out, const char *in, size_t size);
108:
109: /**
110: OracleSQL server driver
111: @test NLS_LANG=AMERICAN_AMERICA.CL8MSWIN1251
112: */
113: class OracleSQL_Driver : public SQL_Driver {
114: public:
115:
116: OracleSQL_Driver() : SQL_Driver() {
117: }
118:
119: /// get api version
120: int api_version() { return SQL_DRIVER_API_VERSION; }
121: /// initialize driver by loading sql dynamic link library
122: const char *initialize(const char *dlopen_file_spec) {
123:
124: const char *error=dlopen_file_spec?
125: dlink(dlopen_file_spec):"client library column is empty";
126: if(!error) {
127:
128: // error="OCIInitialize replacer";/*
129: OCIInitialize((ub4)OCI_THREADED, (dvoid *)0,
130: (dvoid * (*)(void *, unsigned int))0,
131: (dvoid * (*)(void*, void*, unsigned int))0,
132: (void (*)(void*, void*))0 );
133:
134: // */
135: }
136:
137: return error;
138: }
139:
140: /** connect
141: @param used_only_in_connect_url
142: format: @b user:pass@service
143: */
144: void connect(
145: char *used_only_in_connect_url,
146: SQL_Driver_services& services,
147: void **connection ///< output: OracleSQL_connection_struct *
148: ) {
149: // connections are cross-request, do not use services._alloc [linked with request]
150: OracleSQL_connection_struct &cs=
151: *(OracleSQL_connection_struct *)::calloc(sizeof(OracleSQL_connection_struct), 1);
152:
153: char *user=used_only_in_connect_url;
154: char *service=lsplit(user, '@');
155: char *pwd=lsplit(user, ':');
156:
157: if(!(user && pwd && service))
158: services._throw("mailformed connect part, must be 'user:pass@service'");
159:
160: if(setjmp(cs.mark))
161: services._throw(cs.error);
162:
163: // Allocate and initialize OCIError handle, attempt #1
164: /*
165: grabbed from sample
166: /server.804/a58234/oci_func.htm#446192
167: but doc
168: /server.804/a58234/oci_func.htm#446100
169: doesnt have this param listed as allowed
170: 8.1.6 client library barks as OCI_INVALID_HANDLE
171: and debugging revealed that OCI_HTYPE_ENV param value is invalid
172: later in doc
173: /server.804/a58234/oci_func.htm#446192
174: on OCIEnvInit thay say
175: "No changes are done to an already initialized handle"
176: think, this is some sort of backward compatibility wonder.
177: leaving as it is, and without check()
178: */
179: OCIHandleAlloc((dvoid *)NULL, (dvoid **) &cs.envhp, (ub4)OCI_HTYPE_ENV, 0, 0);
180: // Initialize an environment handle, attempt #2
181: check(services, cs, "EnvInit", OCIEnvInit(
182: &cs.envhp, (ub4)OCI_DEFAULT, 0, 0));
183: // Allocate and initialize OCIError handle
184: check(services, cs, "HandleAlloc errhp", OCIHandleAlloc(
185: (dvoid *)cs.envhp, (dvoid **) &cs.errhp, (ub4)OCI_HTYPE_ERROR, 0, 0));
186: // Allocate and initialize OCIServer handle
187: check(services, cs, "HandleAlloc srvhp", OCIHandleAlloc(
188: (dvoid *)cs.envhp, (dvoid **) &cs.srvhp, (ub4)OCI_HTYPE_SERVER, 0, 0));
189: // Attach to a 'service'; initialize server context handle
190: check(services, cs, "ServerAttach", OCIServerAttach(
191: cs.srvhp, cs.errhp, (text *)service, (sb4)strlen(service), (ub4)OCI_DEFAULT));
192: // Allocate and initialize OCISvcCtx handle
193: check(services, cs, "HandleAlloc svchp", OCIHandleAlloc(
194: (dvoid *)cs.envhp, (dvoid **) &cs.svchp, (ub4)OCI_HTYPE_SVCCTX, 0, 0));
195: // set attribute server context in the service context
196: check(services, cs, "AttrSet server-service", OCIAttrSet(
197: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
198: (dvoid *)cs.srvhp, (ub4)0,
199: (ub4)OCI_ATTR_SERVER, (OCIError *)cs.errhp));
200: // allocate a user context handle
201: check(services, cs, "HandleAlloc usrhp", OCIHandleAlloc(
202: (dvoid *)cs.envhp, (dvoid **)&cs.usrhp, (ub4)OCI_HTYPE_SESSION, 0, 0));
203: // set 'user' name
204: check(services, cs, "AttrSet user-session", OCIAttrSet(
205: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
206: (dvoid *)user, (ub4)strlen(user),
207: OCI_ATTR_USERNAME, cs.errhp));
208: // set 'pwd' password
209: check(services, cs, "AttrSet pwd-session", OCIAttrSet(
210: (dvoid *)cs.usrhp, (ub4)OCI_HTYPE_SESSION,
211: (dvoid *)pwd, (ub4)strlen(pwd),
212: OCI_ATTR_PASSWORD, cs.errhp));
213: // Authenticate a user
214: check(services, cs, "SessionBegin", OCISessionBegin(
215: cs.svchp, cs.errhp, cs.usrhp,
216: OCI_CRED_RDBMS, OCI_DEFAULT));
217: // remember connection in session
218: check(services, cs, "AttrSet service-session", OCIAttrSet(
219: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX,
220: (dvoid *)cs.usrhp, (ub4)0,
221: OCI_ATTR_SESSION, cs.errhp));
222:
223: // return created connection
224: *(OracleSQL_connection_struct **)connection=&cs;
225: }
226: void disconnect(void *connection) {
227:
228: return;
229:
230:
231: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
232: // Terminate a user session
233: OCISessionEnd(
234: cs.svchp, cs.errhp, cs.usrhp, (ub4)OCI_DEFAULT);
235: // Detach from a server; uninitialize server context handle
236: OCIServerDetach(
237: cs.srvhp, cs.errhp, (ub4)OCI_DEFAULT);
238: // Free a previously allocated handles
239: /*
240: oci will free them up as belonging to env
241: OCIHandleFree(
242: (dvoid *)cs.srvhp, (ub4)OCI_HTYPE_SERVER);
243: OCIHandleFree(
244: (dvoid *)cs.svchp, (ub4)OCI_HTYPE_SVCCTX);
245: OCIHandleFree(
246: (dvoid *)cs.errhp, (ub4)OCI_HTYPE_ERROR);
247: */
248: OCIHandleFree(
249: (dvoid *)cs.envhp, (ub4)OCI_HTYPE_ENV);
250:
251: // connections are cross-request, do not use services._alloc [linked with request]
252: ::free(&cs);
253: }
254: void commit(SQL_Driver_services& services, void *connection) {
255: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
256: if(setjmp(cs.mark))
257: services._throw(cs.error);
258:
259: check(services, cs, "commit", OCITransCommit(cs.svchp, cs.errhp, 0));
260: }
261: void rollback(SQL_Driver_services& services, void *connection) {
262: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
263: if(setjmp(cs.mark))
264: services._throw(cs.error);
265:
266: check(services, cs, "rollback", OCITransRollback(cs.svchp, cs.errhp, 0));
267: }
268:
269: bool ping(SQL_Driver_services&, void *connection) {
270: // maybe OCIServerVersion?
271: return true;
272: }
273:
274: unsigned int quote(
275: SQL_Driver_services&, void *,
276: char *to, const char *from, unsigned int length) {
277: /*
278: it's already UNTAINT_TIMES_BIGGER
279: */
280: unsigned int result=length;
281: while(length--) {
282: switch(*from) {
283: case '\'': // "'" -> "''"
284: *to++='\'';
285: break;
286: case '\\': // "\" -> "\\"
287: *to++='\'';
288: break;
289: }
290: *to++=*from++;
291: }
292: return result;
293: }
294: void query(
295: SQL_Driver_services& services, void *connection,
296: const char *astatement, unsigned long offset, unsigned long limit,
297: SQL_Driver_query_event_handlers& handlers) {
298:
299: OracleSQL_connection_struct &cs=*(OracleSQL_connection_struct *)connection;
300: OracleSQL_query_lobs lobs={{0}, 0};
301: OCIStmt *stmthp=0;
302:
303: bool failed=false;
304: if(setjmp(cs.mark)) {
305: failed=true;
306: goto cleanup;
307: } else {
308: const char *statement=preprocess_statement(services, cs,
309: astatement, lobs);
310:
311: check(services, cs, "HandleAlloc STMT", OCIHandleAlloc(
312: (dvoid *)cs.envhp, (dvoid **) &stmthp, (ub4)OCI_HTYPE_STMT, 0, 0));
313: check(services, cs, "syntax",
314: OCIStmtPrepare(stmthp, cs.errhp, (unsigned char *)statement,
315: (ub4)strlen((char *)statement),
316: (ub4)OCI_NTV_SYNTAX, (ub4)OCI_DEFAULT));
317: {
318: for(int i=0; i<lobs.count; i++) {
319: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
320: (dvoid *)cs.envhp, (dvoid **)&lobs.items[i].locator, (ub4)OCI_DTYPE_LOB, 0, 0));
321:
322: check(services, cs, "bind output", OCIBindByPos(stmthp,
323: &lobs.items[i].bind, cs.errhp,
324: (ub4)1+i,
325: (dvoid *)&lobs.items[i].locator,
326: (sword)sizeof (lobs.items[i].locator), SQLT_CLOB, (dvoid *)0,
327: (ub2 *)0, (ub2 *)0, (ub4)0, (ub4 *)0, OCI_DATA_AT_EXEC));
328:
329: lobs.items[i].rows.count=0;
330: OracleSQL_query_lobs::cbf_context_struct cbf_context={
331: &services, &cs, &lobs.items[i].rows};
332: check(services, cs, "bind dynamic", OCIBindDynamic(
333: lobs.items[i].bind, cs.errhp,
334: (dvoid *) &cbf_context, cbf_no_data,
335: (dvoid *) &cbf_context, cbf_get_data));
336: }
337: }
338:
339: execute_prepared(services, cs,
340: statement, stmthp, lobs,
341: offset, limit, handlers);
342: }
343: cleanup: // no check call after this point!
344: {
345: for(int i=0; i<lobs.count; i++) {
346: /* free var locator */
347: if(OCILobLocator *locator=lobs.items[i].locator)
348: OCIDescriptorFree((dvoid *)locator, (ub4)OCI_DTYPE_LOB);
349:
350: /* free rows descriptors */
351: OracleSQL_query_lobs::return_rows &rows=lobs.items[i].rows;
352: for(int r=0; r<rows.count; r++)
353: OCIDescriptorFree((dvoid *)rows.row[r].locator, (ub4)OCI_DTYPE_LOB);
354: }
355: }
356: if(stmthp)
357: OCIHandleFree((dvoid *)stmthp, (ub4)OCI_HTYPE_STMT);
358:
359: if(failed)
360: services._throw(cs.error);
361: }
362:
363: private: // private funcs
364:
365: const char *preprocess_statement(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
366: const char *astatement, OracleSQL_query_lobs &lobs) {
367: size_t statement_size=strlen(astatement);
368:
369: char *result=(char *)services.malloc(statement_size
370: +MAX_STRING // in case of short 'strings'
371: +11/* returning */+6/* into */+(MAX_LOB_NAME_LENGTH+2/*:, */)*2/*ret into*/*MAX_IN_LOBS
372: +1);
373: const char *o=astatement;
374:
375: // /**xxx**/'literal' -> EMPTY_CLOB_FUNC_CALL
376: char *n=result;
377: while(*o) {
378: if(
379: o[0]=='/' &&
380: o[1]=='*' &&
381: o[2]=='*') { // name start
382: o+=3;
383: const char *name_begin=o;
384: while(*o)
385: if(
386: o[0]=='*' &&
387: o[1]=='*' &&
388: o[2]=='/' &&
389: o[3]=='\'') { // name end
390: const char *name_end=o;
391: o+=4;
392: OracleSQL_query_lobs::Item &item=lobs.items[lobs.count++];
393: item.name_ptr=name_begin; item.name_size=name_end-name_begin;
394: item.data_ptr=(char *)services.malloc(statement_size/*max*/); item.data_size=0;
395:
396: const char *start=o;
397: bool escaped=false;
398: while(*o && !(o[0]=='\'' && o[1]!='\'' && !escaped)) {
399: escaped=*o=='\\' || (o[0]=='\'' && o[1]=='\'');
400: if(escaped) {
401: // write pending, skip "\" or "'"
402: if(size_t size=o-start) {
403: memcpy(item.data_ptr+item.data_size, start, size);
404: item.data_size+=size;
405: }
406: start=++o;
407: } else
408: o++;
409: }
410: if(size_t size=o-start) {
411: memcpy(item.data_ptr+item.data_size, start, size);
412: item.data_size+=size;
413: }
414: if(*o)
415: o++; // skip "'"
416:
417: n+=sprintf(n, EMPTY_CLOB_FUNC_CALL);
418: break;
419: } else
420: o++; // /**skip**/'xxx'
421: } else
422: *n++=*o++;
423: }
424: *n=0;
425:
426: if(lobs.count) {
427: int i;
428: n+=sprintf(n, " returning ");
429: for(i=0; i<lobs.count; i++) {
430: if(i)
431: *n++=',';
432: n+=sprintf(n, "%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
433: /*memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
434: n+=lobs.items[i].name_size;*/
435: }
436: n+=sprintf(n, " into ");
437: for(i=0; i<lobs.count; i++) {
438: if(i)
439: *n++='x';
440: n+=sprintf(n, ":%.*s", lobs.items[i].name_size, lobs.items[i].name_ptr);
441: /**n++=':';
442: memcpy(n, lobs.items[i].name_ptr, lobs.items[i].name_size);
443: n+=lobs.items[i].name_size;*/
444: }
445: }
446:
447: return result;
448: }
449:
450: void execute_prepared(
451: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
452: const char *statement, OCIStmt *stmthp, OracleSQL_query_lobs &lobs,
453: unsigned long offset, unsigned long limit,
454: SQL_Driver_query_event_handlers& handlers) {
455:
456: ub2 stmt_type=0; // UNKNOWN
457: /*
458: //gpfs on sun. paf 000818
459: //Zanyway, this is needed before.
460: check(services, cs, "get stmt type", OCIAttrGet(
461: (dvoid *)stmthp, (ub4)OCI_HTYPE_STMT, (ub1 *)&stmt_type,
462: (ub4 *)0, OCI_ATTR_STMT_TYPE, cs.errhp));
463: */
464: if(strncasecmp(statement, "select", 6)==0)
465: stmt_type=OCI_STMT_SELECT;
466: else if(strncasecmp(statement, "insert", 6)==0)
467: stmt_type=OCI_STMT_INSERT;
468: else if(strncasecmp(statement, "update", 6)==0)
469: stmt_type=OCI_STMT_UPDATE;
470:
471: sword status=OCIStmtExecute(cs.svchp, stmthp, cs.errhp,
472: (ub4)stmt_type==OCI_STMT_SELECT?0:1, (ub4)0,
473: (OCISnapshot *)NULL,
474: (OCISnapshot *)NULL, (ub4)OCI_DEFAULT);
475:
476: if(status!=OCI_NO_DATA)
477: check(services, cs, "execute", status);
478:
479: {
480: for(int i=0; i<lobs.count; i++)
481: if(ub4 bytes_to_write=lobs.items[i].data_size) {
482: OracleSQL_query_lobs::return_rows *rows=&lobs.items[i].rows;
483: for(int r=0; r<rows->count; r++) {
484: OCILobLocator *locator=rows->row[r].locator;
485: check(services, cs, "lobwrite", OCILobWrite (
486: cs.svchp, cs.errhp,
487: locator, &bytes_to_write, 1,
488: (dvoid *)lobs.items[i].data_ptr, (ub4)bytes_to_write, OCI_ONE_PIECE,
489: (dvoid *)0, 0, (ub2)0,
490: (ub1) SQLCS_IMPLICIT));
491: }
492: }
493: }
494:
495: switch(stmt_type) {
496: case OCI_STMT_SELECT:
497: fetch_table(services, cs,
498: stmthp, offset, limit,
499: handlers);
500: break;
501: default:
502: /*
503: case OCI_STMT_INSERT:
504: case OCI_STMT_UPDATE:
505: */
506: break;
507: }
508: }
509:
510: void fetch_table(SQL_Driver_services& services, OracleSQL_connection_struct &cs,
511: OCIStmt *stmthp, unsigned long offset, unsigned long limit,
512: SQL_Driver_query_event_handlers& handlers) {
513:
514: OCIParam *mypard;
515: ub2 dtype;
516: text *col_name;
517:
518: struct {
519: ub2 type;
520: char *str;
521: OCILobLocator *var;
522: OCIDefine *def;
523: sb2 indicator;
524: } cols[MAX_COLS]={0};
525: int column_count=0;
526:
527: bool failed=false;
528: jmp_buf saved_mark; memcpy(saved_mark, cs.mark, sizeof(jmp_buf));
529: if(setjmp(cs.mark)) {
530: failed=true;
531: goto cleanup;
532: } else {
533: // idea of preincrementing is that at error time all handles would free up
534: while(++column_count<=MAX_COLS) {
535: /* get next descriptor, if there is one */
536: if(OCIParamGet(stmthp, OCI_HTYPE_STMT, cs.errhp, (void **)&mypard,
537: (ub4) column_count)!=OCI_SUCCESS)
538: break;
539:
540: /* Retrieve the data type attribute */
541: check(services, cs, "get type", OCIAttrGet(
542: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
543: (dvoid*) &dtype, (ub4 *)0, (ub4)OCI_ATTR_DATA_TYPE,
544: (OCIError *)cs.errhp));
545:
546: /* Retrieve the column name attribute */
547: ub4 col_name_len;
548: check(services, cs, "get name", OCIAttrGet(
549: (dvoid*) mypard, (ub4)OCI_DTYPE_PARAM,
550: (dvoid**) &col_name, (ub4 *) &col_name_len, (ub4)OCI_ATTR_NAME,
551: (OCIError *)cs.errhp));
552:
553: {
554: size_t size=(size_t)col_name_len;
555: char *ptr=(char *)services.malloc(size);
556: tolower(ptr, (char *)col_name, size);
557: handlers.add_column(ptr, size);
558: }
559:
560: ub2 coerce_type=dtype;
561: sb4 size=0;
562: void *ptr;
563:
564: switch(dtype) {
565: case SQLT_CLOB:
566: {
567: check(services, cs, "alloc output var desc", OCIDescriptorAlloc(
568: (dvoid *)cs.envhp, (dvoid **)(ptr=&cols[column_count-1].var),
569: (ub4)OCI_DTYPE_LOB,
570: 0, (dvoid **)0));
571:
572: size=0;
573: break;
574: }
575: default:
576: coerce_type=SQLT_STR;
577: ptr=cols[column_count-1].str=(char *)services.malloc(MAX_OUT_STRING_LENGTH+1);
578: size=MAX_OUT_STRING_LENGTH;
579: break;
580: }
581:
582: cols[column_count-1].type=coerce_type;
583:
584: check(services, cs, "DefineByPos", OCIDefineByPos(
585: stmthp, &cols[column_count-1].def, cs.errhp,
586: column_count, (ub1 *) ptr, size,
587: coerce_type, (dvoid *) &cols[column_count-1].indicator,
588: (ub2 *)0, (ub2 *)0, OCI_DEFAULT));
589: }
590:
591: handlers.before_rows();
592:
593: for(unsigned long row=0; !limit||row<limit+offset; row++) {
594: sword status=OCIStmtFetch(stmthp, cs.errhp, (ub4)1, (ub4)OCI_FETCH_NEXT,
595: (ub4)OCI_DEFAULT);
596: if(status!=OCI_SUCCESS) {
597: if(status!=OCI_NO_DATA)
598: check(services, cs, "fetch", status);
599: break;
600: }
601: if(row>=offset) {
602: handlers.add_row();
603: for(int i=0; i<column_count; i++) {
604: size_t size;
605: void *ptr;
606: if(cols[i].indicator) { // NULL?
607: size=0;
608: ptr=0;
609: } else // not NULL
610: switch(cols[i].type) {
611: case SQLT_CLOB:
612: {
613: ub4 amtp=4096000000UL;
614: ub4 offset=1;
615: ub4 loblen=0;
616: OCILobLocator *var=(OCILobLocator *)cols[i].var;
617: OCILobGetLength(cs.svchp, cs.errhp, var, &loblen);
618: if(loblen) {
619: size=(size_t)loblen;
620: ptr=services.malloc(size);
621: check(services, cs, "lobread", OCILobRead(cs.svchp, cs.errhp,
622: var, &amtp, offset, (dvoid *) ptr,
623: loblen, (dvoid *)0,
624: 0,
625: (ub2)0, (ub1) SQLCS_IMPLICIT));
626: }
627: break;
628: }
629: default:
630: if(const char *str=cols[i].str) {
631: size=strlen(str);
632: ptr=services.malloc(size);
633: memcpy(ptr, str, size);
634: } else {
635: size=0;
636: ptr=0;
637: }
638: break;
639: }
640: handlers.add_row_cell(ptr, size);
641: }
642: }
643: }
644: }
645:
646: cleanup: // no check call after this point!
647: for(int i=0; i<column_count; i++) {
648: switch(cols[i].type) {
649: case SQLT_CLOB:
650: /* free var locator */
651: OCIDescriptorFree((dvoid *) cols[i].var, (ub4)OCI_DTYPE_LOB);
652: break;
653: default:
654: break;
655: }
656: }
657:
658: if(failed) // need rethrow?
659: longjmp(saved_mark, 1);
660: }
661:
662: private: // conn client library funcs
663:
664: friend void check(
665: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
666: const char *step, sword status);
667: friend sb4 cbf_get_data(dvoid *ctxp,
668: OCIBind *bindp,
669: ub4 iter, ub4 index,
670: dvoid **bufpp,
671: ub4 **alenp,
672: ub1 *piecep,
673: dvoid **indpp,
674: ub2 **rcodepp);
675:
676:
677: #define OCI_DECL(name, params) \
678: typedef sword (*t_OCI##name)params; t_OCI##name OCI##name
679:
680: OCI_DECL(Initialize, (ub4 mode, dvoid *ctxp,
681: dvoid * (*malocfp)(dvoid *ctxp, size_t size),
682: dvoid * (*ralocfp)(dvoid *ctxp, dvoid *memptr, size_t newsize),
683: void (*mfreefp)(dvoid *ctxp, dvoid *memptr) ));
684:
685: OCI_DECL(EnvInit, (OCIEnv **envp, ub4 mode,
686: size_t xtramem_sz, dvoid **usrmempp));
687:
688: OCI_DECL(AttrGet, (CONST dvoid *trgthndlp, ub4 trghndltyp,
689: dvoid *attributep, ub4 *sizep, ub4 attrtype,
690: OCIError *errhp));
691:
692: OCI_DECL(AttrSet, (dvoid *trgthndlp, ub4 trghndltyp, dvoid *attributep,
693: ub4 size, ub4 attrtype, OCIError *errhp));
694:
695: OCI_DECL(BindByPos, (OCIStmt *stmtp, OCIBind **bindp, OCIError *errhp,
696: ub4 position, dvoid *valuep, sb4 value_sz,
697: ub2 dty, dvoid *indp, ub2 *alenp, ub2 *rcodep,
698: ub4 maxarr_len, ub4 *curelep, ub4 mode));
699:
700: OCI_DECL(BindDynamic, (OCIBind *bindp, OCIError *errhp, dvoid *ictxp,
701: OCICallbackInBind icbfp, dvoid *octxp,
702: OCICallbackOutBind ocbfp));
703:
704: OCI_DECL(DefineByPos, (OCIStmt *stmtp, OCIDefine **defnp, OCIError *errhp,
705: ub4 position, dvoid *valuep, sb4 value_sz, ub2 dty,
706: dvoid *indp, ub2 *rlenp, ub2 *rcodep, ub4 mode));
707:
708: OCI_DECL(DescriptorAlloc, (CONST dvoid *parenth, dvoid **descpp,
709: CONST ub4 type, CONST size_t xtramem_sz,
710: dvoid **usrmempp));
711:
712: OCI_DECL(DescriptorFree, (dvoid *descp, CONST ub4 type));
713:
714:
715: OCI_DECL(ErrorGet, (dvoid *hndlp, ub4 recordno, OraText *sqlstate,
716: sb4 *errcodep, OraText *bufp, ub4 bufsiz, ub4 type));
717:
718: OCI_DECL(HandleAlloc, (CONST dvoid *parenth, dvoid **hndlpp, CONST ub4 type,
719: CONST size_t xtramem_sz, dvoid **usrmempp));
720:
721: OCI_DECL(HandleFree, (dvoid *hndlp, CONST ub4 type));
722:
723: OCI_DECL(LobGetLength, (OCISvcCtx *svchp, OCIError *errhp,
724: OCILobLocator *locp,
725: ub4 *lenp));
726:
727: OCI_DECL(LobRead, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
728: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 bufl,
729: dvoid *ctxp, sb4 (*cbfp)(dvoid *ctxp,
730: CONST dvoid *bufp,
731: ub4 len,
732: ub1 piece),
733: ub2 csid, ub1 csfrm));
734:
735: OCI_DECL(LobWrite, (OCISvcCtx *svchp, OCIError *errhp, OCILobLocator *locp,
736: ub4 *amtp, ub4 offset, dvoid *bufp, ub4 buflen,
737: ub1 piece, dvoid *ctxp,
738: sb4 (*cbfp)(dvoid *ctxp,
739: dvoid *bufp,
740: ub4 *len,
741: ub1 *piece),
742: ub2 csid, ub1 csfrm));
743:
744: OCI_DECL(ParamGet, (CONST dvoid *hndlp, ub4 htype, OCIError *errhp,
745: dvoid **parmdpp, ub4 pos));
746:
747: OCI_DECL(ServerAttach, (OCIServer *srvhp, OCIError *errhp,
748: CONST OraText *dblink, sb4 dblink_len, ub4 mode));
749:
750: OCI_DECL(ServerDetach, (OCIServer *srvhp, OCIError *errhp, ub4 mode));
751:
752: OCI_DECL(SessionBegin, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
753: ub4 credt, ub4 mode));
754:
755: OCI_DECL(SessionEnd, (OCISvcCtx *svchp, OCIError *errhp, OCISession *usrhp,
756: ub4 mode));
757:
758: OCI_DECL(StmtExecute, (OCISvcCtx *svchp, OCIStmt *stmtp, OCIError *errhp,
759: ub4 iters, ub4 rowoff, CONST OCISnapshot *snap_in,
760: OCISnapshot *snap_out, ub4 mode));
761:
762: OCI_DECL(StmtFetch, (OCIStmt *stmtp, OCIError *errhp, ub4 nrows,
763: ub2 orientation, ub4 mode));
764:
765: OCI_DECL(StmtPrepare, (OCIStmt *stmtp, OCIError *errhp, CONST OraText *stmt,
766: ub4 stmt_len, ub4 language, ub4 mode));
767:
768: OCI_DECL(TransCommit, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
769:
770: OCI_DECL(TransRollback, (OCISvcCtx *svchp, OCIError *errhp, ub4 flags));
771:
772: private: // conn client library funcs linking
773:
774: const char *dlink(const char *dlopen_file_spec) {
775: if(lt_dlinit())
776:
777: return lt_dlerror();
778:
779:
780:
781: lt_dlhandle handle=lt_dlopen(dlopen_file_spec);
782:
783: //return "hren31";
784:
785: if(!handle)
786: return lt_dlerror(); //"can not open the dynamic link module";
787:
788: #define DSLINK(name, action) \
789: name=(t_##name)lt_dlsym(handle, #name); \
790: if(!name) \
791: action;
792:
793: #define OCI_LINK(name) DSLINK(OCI##name, return "function OCI" #name " was not found")
794:
795: OCI_LINK(Initialize);
796: OCI_LINK(EnvInit);
797: OCI_LINK(AttrGet); OCI_LINK(AttrSet);
798: OCI_LINK(BindByPos); OCI_LINK(BindDynamic);
799: OCI_LINK(DefineByPos);
800: OCI_LINK(DescriptorAlloc); OCI_LINK(DescriptorFree);
801: OCI_LINK(ErrorGet);
802: OCI_LINK(HandleAlloc); OCI_LINK(HandleFree);
803: OCI_LINK(LobGetLength);
804: OCI_LINK(LobRead); OCI_LINK(LobWrite);
805: OCI_LINK(ParamGet);
806: OCI_LINK(ServerAttach); OCI_LINK(ServerDetach);
807: OCI_LINK(SessionBegin); OCI_LINK(SessionEnd);
808: OCI_LINK(StmtExecute); OCI_LINK(StmtFetch); OCI_LINK(StmtPrepare);
809: OCI_LINK(TransCommit); OCI_LINK(TransRollback);
810:
811: return 0;
812: }
813:
814: } *OracleSQL_driver;
815:
816: void check(
817: SQL_Driver_services& services, OracleSQL_connection_struct &cs,
818: const char *step, sword status) {
819:
820: const char *msg;
821: char reason[MAX_STRING/2];
822:
823: switch (status) {
824: case OCI_SUCCESS:
825: return; // hurrah
826: case OCI_ERROR:
827: {
828: sb4 errcode;
829: if(OracleSQL_driver->OCIErrorGet((dvoid *)cs.errhp, (ub4)1, (text *)NULL, &errcode,
830: (text *)reason, (ub4)sizeof(reason), OCI_HTYPE_ERROR)==OCI_SUCCESS)
831: msg=reason;
832: else
833: msg="[can not get error description]";
834: break;
835: }
836: case OCI_SUCCESS_WITH_INFO:
837: msg="SUCCESS_WITH_INFO"; break;
838: case OCI_NEED_DATA:
839: msg="NEED_DATA"; break;
840: case OCI_NO_DATA:
841: msg="NODATA"; break;
842: case OCI_INVALID_HANDLE:
843: msg="INVALID_HANDLE"; break;
844: case OCI_STILL_EXECUTING:
845: msg="STILL_EXECUTE"; break;
846: case OCI_CONTINUE:
847: msg="CONTINUE"; break;
848: default:
849: msg="unknown"; break;
850: }
851:
852: snprintf(cs.error, sizeof(cs.error), "%s (%s, %d)",
853: msg, step, (int)status);
854: longjmp(cs.mark, 1);
855: }
856:
857:
858: /* ----------------------------------------------------------------- */
859: /* Intbind callback that does not do any data input. */
860: /* ----------------------------------------------------------------- */
861: static sb4 cbf_no_data(
862: dvoid *ctxp,
863: OCIBind *bindp,
864: ub4 iter, ub4 index,
865: dvoid **bufpp,
866: ub4 *alenpp,
867: ub1 *piecep,
868: dvoid **indpp) {
869: *bufpp=(dvoid *)0;
870: *alenpp=0;
871: static sb2 null_ind=-1;
872: *indpp=(dvoid *) &null_ind;
873: *piecep=OCI_ONE_PIECE;
874:
875: return OCI_CONTINUE;
876: }
877:
878: /* ----------------------------------------------------------------- */
879: /* Outbind callback for returning data. */
880: /* ----------------------------------------------------------------- */
881: static sb4 cbf_get_data(dvoid *ctxp,
882: OCIBind *bindp,
883: ub4 iter, ub4 index,
884: dvoid **bufpp,
885: ub4 **alenp,
886: ub1 *piecep,
887: dvoid **indpp,
888: ub2 **rcodepp) {
889: OracleSQL_query_lobs::cbf_context_struct &context=
890: *(OracleSQL_query_lobs::cbf_context_struct *)ctxp;
891:
892: if(index==0) {
893: static ub4 rows;
894: check(*context.services, *context.cs, "AttrGet cbf_get_data ROWS_RETURNED",
895: OracleSQL_driver->OCIAttrGet(
896: (CONST dvoid *) bindp, OCI_HTYPE_BIND, (dvoid *)&rows,
897: (ub4 *)sizeof(ub2), OCI_ATTR_ROWS_RETURNED, context.cs->errhp)) ;
898: context.rows->count=(ub2)rows;
899: context.rows->row=(OracleSQL_query_lobs::return_rows::return_row *)
900: context.services->malloc(sizeof(OracleSQL_query_lobs::return_rows::return_row)*rows);
901: }
902:
903: OracleSQL_query_lobs::return_rows::return_row &var=context.rows->row[index];
904:
905: check(*context.services, *context.cs, "alloc output var desc dynamic", OracleSQL_driver->OCIDescriptorAlloc(
906: (dvoid *) context.cs->envhp, (dvoid **)&var.locator,
907: (ub4)OCI_DTYPE_LOB,
908: 0, (dvoid **)0));
909:
910: *bufpp=var.locator;
911: *alenp=&var.len;
912: *indpp=(dvoid *) &var.ind;
913: *piecep=OCI_ONE_PIECE;
914: *rcodepp=&var.rcode;
915:
916: return OCI_CONTINUE;
917: }
918:
919: void tolower(char *out, const char *in, size_t size) {
920: while(size--)
921: *out++=tolower(*in++);
922: }
923:
924: extern "C" SQL_Driver *SQL_DRIVER_CREATE() {
925: //_asm int 3;
926: return OracleSQL_driver=new OracleSQL_Driver();
927: }