Annotation of parser3/src/classes/op.C, revision 1.75
1.1 paf 1: /** @file
1.9 paf 2: Parser: parser @b operators.
1.1 paf 3:
1.70 paf 4: Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
1.71 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 paf 6:
1.75 ! paf 7: $Id: op.C,v 1.74 2002/03/18 15:29:45 paf Exp $
1.1 paf 8: */
9:
1.13 paf 10: #include "classes.h"
1.1 paf 11: #include "pa_common.h"
12: #include "pa_request.h"
13: #include "pa_vint.h"
14: #include "pa_sql_connection.h"
15:
1.18 parser 16: // limits
17:
18: #define MAX_LOOPS 10000
19:
1.10 paf 20: // defines
21:
22: #define OP_CLASS_NAME "OP"
1.11 paf 23:
1.10 paf 24: // class
25:
26: class MOP : public Methoded {
27: public:
28: MOP(Pool& pool);
1.11 paf 29: public: // Methoded
1.10 paf 30: bool used_directly() { return true; }
1.11 paf 31: void configure_user(Request& r);
1.36 parser 32:
1.11 paf 33: private:
34: String main_sql_name;
35: String main_sql_drivers_name;
1.10 paf 36: };
37:
38: // methods
39:
1.5 paf 40: static void _if(Request& r, const String&, MethodParams *params) {
1.48 parser 41: Value& condition_code=params->as_junction(0, "condition must be expression");
1.1 paf 42:
43: bool condition=r.process(condition_code,
44: 0/*no name*/,
45: false/*don't intercept string*/).as_bool();
1.6 paf 46: if(condition)
1.34 parser 47: r.write_pass_lang(r.process(params->as_junction(1, "'then' parameter must be code")));
1.50 parser 48: else if(params->size()>2)
1.34 parser 49: r.write_pass_lang(r.process(params->as_junction(2, "'else' parameter must be code")));
1.1 paf 50: }
51:
1.5 paf 52: static void _untaint(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 53: Pool& pool=r.pool();
54:
1.60 paf 55: uchar lang;
1.59 paf 56: if(params->size()==1)
57: lang=String::UL_AS_IS; // mark as simply 'tainted'. useful in html from sql
58: else {
59: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 60: lang=untaint_lang_name2enum->get_int(lang_name);
1.59 paf 61: if(!lang)
62: throw Exception(0, 0,
63: &lang_name,
64: "invalid taint language");
65: }
1.1 paf 66:
67: {
1.59 paf 68: Value& vbody=params->as_junction(params->size()-1, "body must be code");
1.1 paf 69:
70: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.5 paf 71: r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang
1.1 paf 72: }
73: }
74:
1.5 paf 75: static void _taint(Request& r, const String&, MethodParams *params) {
1.1 paf 76: Pool& pool=r.pool();
77:
1.60 paf 78: uchar lang;
1.1 paf 79: if(params->size()==1)
80: lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set
81: else {
1.48 parser 82: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 83: lang=untaint_lang_name2enum->get_int(lang_name);
1.1 paf 84: if(!lang)
1.53 parser 85: throw Exception(0, 0,
1.3 paf 86: &lang_name,
87: "invalid taint language");
1.1 paf 88: }
89:
90: {
1.34 parser 91: Value& vbody=params->as_no_junction(params->size()-1, "body must not be code");
1.1 paf 92:
93: String result(r.pool());
94: result.append(
95: vbody.as_string(), // process marking tainted with that lang
96: lang, true); // force result language to specified
97: r.write_pass_lang(result);
98: }
99: }
100:
1.5 paf 101: static void _process(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 102: // calculate pseudo file name of processed chars
103: // would be something like "/some/file(4) process"
104: char place[MAX_STRING];
105: #ifndef NO_STRING_ORIGIN
106: const Origin& origin=method_name.origin();
107: snprintf(place, MAX_STRING, "%s(%d) %s",
108: origin.file, 1+origin.line,
109: method_name.cstr());
110: #else
1.39 parser 111: strncpy(place, method_name.cstr(), MAX_STRING-1); place[MAX_STRING-1]=0;
1.1 paf 112: #endif
113:
114: VStateless_class& self_class=*r.self->get_class();
1.73 paf 115: const Method *main_method;
1.1 paf 116: {
1.73 paf 117: // temporary remove language change
118: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.1 paf 119: // temporary zero @main so to maybe-replace it in processed code
120: Temp_method temp_method_main(self_class, *main_method_name, 0);
121: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
122: Temp_method temp_method_auto(self_class, *auto_method_name, 0);
123:
124: // evaluate source to process
125: const String& source=
1.61 paf 126: r.process(params->as_junction(0, "body must be code")).as_string();
1.1 paf 127:
128: // process source code, append processed methods to 'self' class
129: // maybe-define new @main
1.67 paf 130: r.use_buf(
131: source.cstr(String::UL_UNSPECIFIED, r.connection(0)),
132: place,
133: &self_class);
1.1 paf 134:
1.73 paf 135: // main_method
136: main_method=self_class.get_method(*main_method_name);
137: }
138: // after restoring current-request-lang
139: // maybe-execute @main[]
140: if(main_method) {
141: // execute!
142: r.execute(*main_method->parser_code);
1.1 paf 143: }
144: }
145:
1.5 paf 146: static void _rem(Request& r, const String&, MethodParams *params) {
1.34 parser 147: params->as_junction(0, "body must be code");
1.1 paf 148: }
149:
1.5 paf 150: static void _while(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 151: Pool& pool=r.pool();
152:
1.34 parser 153: Value& vcondition=params->as_junction(0, "condition must be expression");
154: Value& body=params->as_junction(1, "body must be code");
1.1 paf 155:
156: // while...
157: int endless_loop_count=0;
158: while(true) {
1.18 parser 159: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.53 parser 160: throw Exception(0, 0,
1.1 paf 161: &method_name,
162: "endless loop detected");
163:
164: bool condition=
165: r.process(
166: vcondition,
167: 0/*no name*/,
168: false/*don't intercept string*/).as_bool();
169: if(!condition) // ...condition is true
170: break;
171:
172: // write processed body
173: r.write_pass_lang(r.process(body));
174: }
175: }
176:
1.5 paf 177: static void _use(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 178: Value& vfile=params->as_no_junction(0, "file name must not be code");
1.37 parser 179: r.use_file(vfile.as_string());
1.1 paf 180: }
181:
1.5 paf 182: static void _for(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 183: Pool& pool=r.pool();
1.48 parser 184: const String& var_name=params->as_string(0, "var name must be string");
185: int from=params->as_int(1, "from must be int", r);
186: int to=params->as_int(2, "to must be int", r);
1.34 parser 187: Value& body_code=params->as_junction(3, "body must be code");
1.50 parser 188: Value *delim_maybe_code=params->size()>4?¶ms->get(4):0;
1.1 paf 189:
1.57 paf 190: if(to-from>=MAX_LOOPS) // too long loop?
191: throw Exception(0, 0,
192: &method_name,
193: "endless loop detected");
194:
1.1 paf 195: bool need_delim=false;
196: VInt *vint=new(pool) VInt(pool, 0);
197: for(int i=from; i<=to; i++) {
198: vint->set_int(i);
1.56 paf 199: r.root->put_element(var_name, vint);
1.1 paf 200:
201: Value& processed_body=r.process(body_code);
1.49 parser 202: if(delim_maybe_code) { // delimiter set?
1.1 paf 203: const String *string=processed_body.get_string();
204: if(need_delim && string && string->size()) // need delim & iteration produced string?
1.49 parser 205: r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 206: need_delim=true;
207: }
208: r.write_pass_lang(processed_body);
209: }
210: }
211:
1.15 paf 212: static void _eval(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 213: Value& expr=params->as_junction(0, "need expression");
1.1 paf 214: // evaluate expresion
215: Value *result=r.process(expr,
1.16 paf 216: 0/*no name YET*/,
1.1 paf 217: true/*don't intercept string*/).as_expr_result();
1.50 parser 218: if(params->size()>1) {
1.34 parser 219: Value& fmt=params->as_no_junction(1, "fmt must not be code");
1.1 paf 220:
221: Pool& pool=r.pool();
222: String& string=*new(pool) String(pool);
223: string.APPEND_CONST(format(pool, result->as_double(), fmt.as_string().cstr()));
224: result=new(pool) VString(string);
225: }
1.16 paf 226: result->set_name(method_name);
1.1 paf 227: r.write_no_lang(*result);
228: }
229:
1.42 parser 230: static void _connect(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 231: Pool& pool=r.pool();
1.63 paf 232: #ifdef RESOURCES_DEBUG
233: struct timeval mt[2];
234: #endif
1.34 parser 235: Value& url=params->as_no_junction(0, "url must not be code");
236: Value& body_code=params->as_junction(1, "body must be code");
1.1 paf 237:
1.19 parser 238: Table *protocol2driver_and_client=
1.35 parser 239: static_cast<Table *>(r.classes_conf.get(r.OP.name()));
1.11 paf 240:
1.63 paf 241: #ifdef RESOURCES_DEBUG
242: //measure:before
243: gettimeofday(&mt[0],NULL);
244: #endif
1.1 paf 245: // connect
1.67 paf 246: SQL_Connection_ptr connection=SQL_driver_manager->get_connection(
1.42 parser 247: url.as_string(), method_name, protocol2driver_and_client);
1.1 paf 248:
1.63 paf 249: #ifdef RESOURCES_DEBUG
250: //measure:after connect
251: gettimeofday(&mt[1],NULL);
252:
253: double t[2];
254: for(int i=0;i<2;i++)
255: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
256:
257: r.sql_connect_time+=t[1]-t[0];
258: #endif
1.67 paf 259: Temp_connection temp_connection(r, connection.get());
1.1 paf 260: // execute body
1.53 parser 261: try {
1.67 paf 262: r.write_assign_lang(r.process(body_code));
1.75 ! paf 263: } catch(...) { // process problem
1.67 paf 264: connection->mark_to_rollback();
265: /*re*/throw;
1.1 paf 266: }
267: }
268:
1.41 parser 269: #ifndef DOXYGEN
1.28 parser 270: struct Switch_data {
271: Value *searching;
272: Value *found;
273: Value *_default;
274: };
1.41 parser 275: #endif
1.28 parser 276: static void _switch(Request& r, const String&, MethodParams *params) {
277: void *backup=r.classes_conf.get(*switch_data_name);
278: Switch_data data={&r.process(params->get(0))};
279: r.classes_conf.put(*switch_data_name, &data);
280:
1.34 parser 281: r.process(params->as_junction(1, "switch cases must be code")); // and ignore result
1.28 parser 282:
283: r.classes_conf.put(*switch_data_name, backup);
284:
285: if(Value *code=data.found ? data.found : data._default)
286: r.write_pass_lang(r.process(*code));
287: }
288:
1.38 parser 289: static void _case(Request& r, const String& method_name, MethodParams *params) {
290: Pool& pool=r.pool();
291:
292: Switch_data *data=static_cast<Switch_data *>(r.classes_conf.get(*switch_data_name));
293: if(!data)
1.53 parser 294: throw Exception(0, 0,
1.38 parser 295: &method_name,
296: "without switch");
1.28 parser 297:
298: int count=params->size();
1.34 parser 299: Value *code=¶ms->as_junction(--count, "case result must be code");
1.28 parser 300: for(int i=0; i<count; i++) {
301: Value& value=r.process(params->get(i));
302:
1.36 parser 303: if(value.as_string() == *case_default_value) {
1.38 parser 304: data->_default=code;
1.28 parser 305: break;
306: }
307:
308: bool matches;
1.38 parser 309: if(data->searching->is_string())
310: matches=data->searching->as_string() == value.as_string();
1.28 parser 311: else
1.38 parser 312: matches=data->searching->as_double() == value.as_double();
1.28 parser 313:
314: if(matches) {
1.38 parser 315: data->found=code;
1.28 parser 316: break;
317: }
318: }
319: }
320:
1.63 paf 321: // cache--
322:
323: // consts
324:
325: const int DATA_STRING_SERIALIZED_VERSION=0x0001;
326:
327: // helper types
328:
329: #ifndef DOXYGEN
330: struct Data_string_serialized_prolog {
331: int version;
332: };
333: #endif
334:
1.68 paf 335: void cache_delete(const String& file_spec) {
336: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 337: }
1.69 paf 338:
339: #ifndef DOXYGEN
340: struct Locked_process_and_cache_put_action_info {
341: Request *r;
342: Value *body;
343: };
344: #endif
345: static void locked_process_and_cache_put_action(int f, void *context) {
346: Locked_process_and_cache_put_action_info& info=
347: *static_cast<Locked_process_and_cache_put_action_info *>(context);
348:
349: // body->process
350: info.body=&info.r->process(*info.body);
351:
352: // result->string
353: const String& data_string=info.body->as_string();
354:
355: // string -serialize> buffer
1.63 paf 356: void *data; size_t data_size;
357: data_string.serialize(
358: sizeof(Data_string_serialized_prolog),
359: data, data_size);
360: Data_string_serialized_prolog& prolog=
361: *static_cast<Data_string_serialized_prolog *>(data);
362: prolog.version=DATA_STRING_SERIALIZED_VERSION;
1.69 paf 363:
364: // buffer -write> file
365: write(f, data, data_size);
366: }
367: Value *locked_process_and_cache_put(Request& r,
368: Value& body_code,
369: const String& file_spec) {
370: Locked_process_and_cache_put_action_info info={
371: &r,
372: &body_code,
373: };
374:
375: return file_write_action_under_lock(
376: file_spec,
377: "cache_put", locked_process_and_cache_put_action, &info,
378: false/*as_text*/,
379: false/*do_append*/,
380: false/*block*/) ? info.body : 0;
1.63 paf 381: }
382: String *cache_get(Pool& pool, const String& file_spec) {
383: void* data; size_t data_size;
1.72 paf 384: if(file_read(pool, file_spec,
1.63 paf 385: data, data_size,
386: false/*as_text*/,
1.69 paf 387: false/*fail_on_read_problem*/)
1.72 paf 388: && data_size/* ignore reads which are empty due to
389: non-unary open+lockEX conflict with lockSH */) {
1.63 paf 390:
1.72 paf 391: Data_string_serialized_prolog& prolog=
392: *static_cast<Data_string_serialized_prolog *>(data);
1.63 paf 393:
1.72 paf 394: String *result=new(pool) String(pool);
395: if(
396: data_size>=sizeof(Data_string_serialized_prolog)
397: && prolog.version==DATA_STRING_SERIALIZED_VERSION
398: && result->deserialize(
399: sizeof(Data_string_serialized_prolog), data, data_size, file_spec.cstr()))
400: return result;
401: }
1.63 paf 402:
1.72 paf 403: return 0;
1.63 paf 404: }
405: static void _cache(Request& r, const String& method_name, MethodParams *params) {
406: Pool& pool=r.pool();
407:
408: // file_spec, expires, body code
1.65 paf 409: const String &file_spec=r.absolute(params->as_string(0, "filespec must be string"));
410: if(params->size()==1) { // delete
1.68 paf 411: cache_delete(file_spec);
1.65 paf 412: return;
413: }
414:
1.63 paf 415: time_t lifespan=(time_t)params->as_double(1, "lifespan must be number", r);
416: Value& body_code=params->as_junction(2, "body must be code");
417:
418: if(lifespan) { // 'lifespan' specified? try cached copy...
419: size_t size;
420: time_t atime, mtime, ctime;
1.69 paf 421:
422: // hence we don't hope to have unary create/lockEX
423: // we need some plan to live in a life like that, so...
424: // worst races plan:
425: // A B
426: // open
427: // |open
428: // lockSH
429: // |nonblocking-lockEX fails
430: // unlockSH
431: // close, cache_get returns 0
432: // open
433: // nonblocking-lockEX succeeds; process, write, close
434: // |retry1: open
435: // ...
436: // |lockSH succeeds; ...
437:
1.63 paf 438: // {file_spec} modification time
1.69 paf 439: for(int retry=0; retry<2; retry++) {
440: if(file_stat(file_spec, size, atime, mtime, ctime, false/*no exception on error*/)) // exists?
441: if(time(0)-mtime > lifespan) // expired
442: cache_delete(file_spec);
443: else // not expired
444: if(String *cached_body=cache_get(pool, file_spec)) { // have cached copy?
445: // write it out
446: r.write_assign_lang(*cached_body);
447: // happy with it
448: return;
449: }
450:
451: // non-blocked lock; process; cache it
452: if(Value *processed_body=locked_process_and_cache_put(r, body_code, file_spec)) {
1.63 paf 453: // write it out
1.69 paf 454: r.write_assign_lang(*processed_body);
1.63 paf 455: // happy with it
456: return;
1.69 paf 457: } else { // somebody writing result right now
458: pa_sleep(0, 500000); // waiting half a second
459: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 460: }
1.69 paf 461: }
462: throw Exception(0, 0,
463: &file_spec,
464: "locking problem");
465: } else {
466: // 'lifespan'=0, forget cached copy
1.68 paf 467: cache_delete(file_spec);
1.69 paf 468: // process
469: Value& processed_body=r.process(body_code);
470: // write it out
471: r.write_assign_lang(processed_body);
472: // happy with it
473: return;
474: }
475: // never reached
1.63 paf 476: }
477:
1.74 paf 478: // also used in pa_request.C to pass param to @unhandled_exception
479: VHash& exception2vhash(Pool& pool, const Exception& e) {
480: VHash& result=*new(pool) VHash(pool);
481: Hash& hash=result.hash(0);
482: if(const String *type=e.type())
483: hash.put(*exception_type_part_name, new(pool) VString(*type));
484: if(const String *source=e.problem_source()) {
485: result.set_name(*source);
486:
487: hash.put(*exception_source_part_name, new(pool) VString(*source));
488: #ifndef NO_STRING_ORIGIN
489: const Origin& origin=source->origin();
490: hash.put(*new(pool) String(pool, "file"),
491: new(pool) VString(*new(pool) String(pool, origin.file)));
492: hash.put(*new(pool) String(pool, "lineno"),
493: new(pool) VInt(pool, 1+origin.line));
494: #endif
495: }
496: if(const char *ecomment=e.comment()) {
497: int comment_size=strlen(ecomment);
498: char *pcomment=(char *)pool.malloc(comment_size);
499: memcpy(pcomment, ecomment, comment_size);
500: hash.put(*exception_comment_part_name,
501: new(pool) VString(*new(pool) String(pool, pcomment, comment_size)));
502: }
503: hash.put(*exception_handled_part_name,
504: new(pool) VBool(pool, false));
505:
506: return result;
507: }
508:
509: static void _try_operator(Request& r, const String& method_name, MethodParams *params) {
510: Pool& pool=r.pool();
511:
512: Value& body_code=params->as_junction(0, "body_code must be code");
513: Value& catch_code=params->as_junction(1, "catch_code must be code");
514:
515: Value *result;
516:
517: // taking snapshot of request processing status
518: int stop_index=r.stack.top_index();
519: Value *sself=r.self, *sroot=r.root, *srcontext=r.rcontext;
520: WContext *swcontext=r.wcontext;
521: try {
522: result=&r.process(body_code);
523: } catch(const Exception& e) {
524: // restoring request processing status
525: r.stack.top_index(stop_index);
526: r.self=sself; r.root=sroot, r.rcontext=srcontext; r.wcontext=swcontext;
527:
528: VHash& vhash=exception2vhash(pool, e);
529:
530: Junction *junction=catch_code.get_junction();
531: Value *saved_exception_var_value=junction->root->get_element(*exception_var_name);
532: junction->root->put_element(*exception_var_name, &vhash);
533: result=&r.process(catch_code);
534: bool handled=false;
535: if(Value *value=static_cast<Value *>(vhash.hash(0).get(*exception_handled_part_name)))
536: handled=value->as_bool();
537: junction->root->put_element(*exception_var_name, saved_exception_var_value);
538:
539: if(!handled)
540: throw(e); // rethrow
541: }
542: // write it out
543: r.write_pass_lang(*result);
544: }
545:
546: static void _throw_operator(Request& r, const String& method_name, MethodParams *params) {
547: Pool& pool=r.pool();
548:
549: if(params->size()==1) {
550: Value& param0=params->get(0);
551: if(Hash *hash=param0.get_hash(&method_name)) {
552: const String *type=0;
553: if(Value *value=static_cast<Value *>(hash->get(*exception_type_part_name)))
554: type=&value->as_string();
555: const String *source=0;
556: if(Value *value=static_cast<Value *>(hash->get(*exception_source_part_name)))
557: source=&value->as_string();
558: const char *comment=0;
559: if(Value *value=
560: static_cast<Value *>(hash->get(*exception_comment_part_name)))
561: comment=value->as_string().cstr();
562:
563: throw Exception(type, 0,
564: source?source:&method_name,
565: comment);
566: } else
567: throw Exception(0, 0,
568: &method_name,
569: "one-param version has hash param");
570: } else {
571: const String& type=params->as_string(0, "type must be string");
572: const String& source=params->as_string(1, "source must be string");
573: const char *comment=params->as_string(2, "comment must be string").cstr();
574: throw Exception(&type, 0,
575: &source,
576: comment);
577: }
578: }
579:
1.10 paf 580: // constructor
581:
1.11 paf 582: MOP::MOP(Pool& apool) : Methoded(apool),
583: main_sql_name(apool, MAIN_SQL_NAME),
584: main_sql_drivers_name(apool, MAIN_SQL_DRIVERS_NAME)
585: {
1.10 paf 586: set_name(*NEW String(pool(), OP_CLASS_NAME));
1.28 parser 587:
1.1 paf 588: // ^if(condition){code-when-true}
589: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 590: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 591:
592: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 593: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 594:
595: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 596: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 597:
598: // ^process[code]
1.10 paf 599: add_native_method("process", Method::CT_ANY, _process, 1, 1);
1.1 paf 600:
601: // ^rem{code}
1.51 parser 602: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 603:
604: // ^while(condition){code}
1.10 paf 605: add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.1 paf 606:
607: // ^use[file]
1.10 paf 608: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 609:
1.54 paf 610: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 611: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 612:
613: // ^eval(expr)
614: // ^eval(expr)[format]
1.10 paf 615: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 616:
1.1 paf 617: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 618: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
619:
1.63 paf 620:
1.65 paf 621: // ^cache[file_spec] delete cache
1.63 paf 622: // ^cache[file_spec](time){code} time=0 no cache
1.65 paf 623: add_native_method("cache", Method::CT_ANY, _cache, 1, 3);
1.63 paf 624:
1.28 parser 625: // switch
626:
627: // ^switch[value]{cases}
628: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
629:
630: // ^case[value]{code}
1.51 parser 631: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 632:
633: // try-catch
634:
635: // ^try{code}{catch code}
636: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
637: // ^throw[$exception hash]
638: // ^throw[type;source;comment]
639: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
640:
1.10 paf 641: }
1.11 paf 642:
643: // constructor & configurator
1.1 paf 644:
1.10 paf 645: Methoded *MOP_create(Pool& pool) {
1.35 parser 646: return new(pool) MOP(pool);
1.11 paf 647: }
648:
649: void MOP::configure_user(Request& r) {
650: Pool& pool=r.pool();
651:
652: // $MAIN:SQL.drivers
653: if(Value *sql=r.main_class->get_element(main_sql_name))
654: if(Value *element=sql->get_element(main_sql_drivers_name))
655: if(Table *protocol2library=element->get_table())
656: r.classes_conf.put(name(), protocol2library);
1.1 paf 657: }
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