Annotation of parser3/src/classes/op.C, revision 1.86
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:
1.86 ! paf 7: $Id: op.C,v 1.85 2002/04/15 12:03:31 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"
1.79 paf 15: #include "pa_vdate.h"
1.1 paf 16:
1.18 parser 17: // limits
18:
19: #define MAX_LOOPS 10000
20:
1.10 paf 21: // defines
22:
23: #define OP_CLASS_NAME "OP"
1.82 paf 24: #define CASE_DEFAULT_VALUE "DEFAULT"
1.11 paf 25:
1.10 paf 26: // class
27:
28: class MOP : public Methoded {
29: public:
30: MOP(Pool& pool);
1.11 paf 31: public: // Methoded
1.10 paf 32: bool used_directly() { return true; }
1.11 paf 33: void configure_user(Request& r);
1.36 parser 34:
1.11 paf 35: private:
36: String main_sql_name;
37: String main_sql_drivers_name;
1.10 paf 38: };
39:
40: // methods
41:
1.5 paf 42: static void _if(Request& r, const String&, MethodParams *params) {
1.48 parser 43: Value& condition_code=params->as_junction(0, "condition must be expression");
1.1 paf 44:
1.81 paf 45: bool condition=r.process_to_value(condition_code,
1.83 paf 46: /*0/*no name* /,*/
1.1 paf 47: false/*don't intercept string*/).as_bool();
1.6 paf 48: if(condition)
1.85 paf 49: r.write_pass_lang(r.process(params->as_junction(1, "'then' parameter must be code")));
1.50 parser 50: else if(params->size()>2)
1.85 paf 51: r.write_pass_lang(r.process(params->as_junction(2, "'else' parameter must be code")));
1.1 paf 52: }
53:
1.5 paf 54: static void _untaint(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 55: Pool& pool=r.pool();
56:
1.60 paf 57: uchar lang;
1.59 paf 58: if(params->size()==1)
59: lang=String::UL_AS_IS; // mark as simply 'tainted'. useful in html from sql
60: else {
61: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 62: lang=untaint_lang_name2enum->get_int(lang_name);
1.59 paf 63: if(!lang)
1.78 paf 64: throw Exception(0,
1.59 paf 65: &lang_name,
66: "invalid taint language");
67: }
1.1 paf 68:
69: {
1.59 paf 70: Value& vbody=params->as_junction(params->size()-1, "body must be code");
1.1 paf 71:
72: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.86 ! paf 73: r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang
1.1 paf 74: }
75: }
76:
1.5 paf 77: static void _taint(Request& r, const String&, MethodParams *params) {
1.1 paf 78: Pool& pool=r.pool();
79:
1.60 paf 80: uchar lang;
1.1 paf 81: if(params->size()==1)
82: lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set
83: else {
1.48 parser 84: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 85: lang=untaint_lang_name2enum->get_int(lang_name);
1.1 paf 86: if(!lang)
1.78 paf 87: throw Exception(0,
1.3 paf 88: &lang_name,
89: "invalid taint language");
1.1 paf 90: }
91:
92: {
1.34 parser 93: Value& vbody=params->as_no_junction(params->size()-1, "body must not be code");
1.1 paf 94:
95: String result(r.pool());
96: result.append(
97: vbody.as_string(), // process marking tainted with that lang
98: lang, true); // force result language to specified
99: r.write_pass_lang(result);
100: }
101: }
102:
1.5 paf 103: static void _process(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 104: // calculate pseudo file name of processed chars
105: // would be something like "/some/file(4) process"
106: char place[MAX_STRING];
107: #ifndef NO_STRING_ORIGIN
108: const Origin& origin=method_name.origin();
109: snprintf(place, MAX_STRING, "%s(%d) %s",
110: origin.file, 1+origin.line,
111: method_name.cstr());
112: #else
1.39 parser 113: strncpy(place, method_name.cstr(), MAX_STRING-1); place[MAX_STRING-1]=0;
1.1 paf 114: #endif
115:
116: VStateless_class& self_class=*r.self->get_class();
1.73 paf 117: const Method *main_method;
1.1 paf 118: {
1.73 paf 119: // temporary remove language change
120: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.1 paf 121: // temporary zero @main so to maybe-replace it in processed code
122: Temp_method temp_method_main(self_class, *main_method_name, 0);
123: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
124: Temp_method temp_method_auto(self_class, *auto_method_name, 0);
125:
126: // evaluate source to process
1.86 ! paf 127: const String& source=r.process_to_string(params->as_junction(0, "body must be code"));
1.1 paf 128:
129: // process source code, append processed methods to 'self' class
130: // maybe-define new @main
1.67 paf 131: r.use_buf(
132: source.cstr(String::UL_UNSPECIFIED, r.connection(0)),
133: place,
134: &self_class);
1.1 paf 135:
1.73 paf 136: // main_method
137: main_method=self_class.get_method(*main_method_name);
138: }
139: // after restoring current-request-lang
140: // maybe-execute @main[]
141: if(main_method) {
142: // execute!
143: r.execute(*main_method->parser_code);
1.1 paf 144: }
145: }
146:
1.5 paf 147: static void _rem(Request& r, const String&, MethodParams *params) {
1.34 parser 148: params->as_junction(0, "body must be code");
1.1 paf 149: }
150:
1.5 paf 151: static void _while(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 152: Pool& pool=r.pool();
153:
1.34 parser 154: Value& vcondition=params->as_junction(0, "condition must be expression");
155: Value& body=params->as_junction(1, "body must be code");
1.1 paf 156:
157: // while...
158: int endless_loop_count=0;
159: while(true) {
1.18 parser 160: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.78 paf 161: throw Exception("parser.runtime",
1.1 paf 162: &method_name,
163: "endless loop detected");
164:
1.86 ! paf 165: bool condition=r.process_to_value(vcondition,
1.83 paf 166: /*0/*no name* /,*/
1.1 paf 167: false/*don't intercept string*/).as_bool();
168: if(!condition) // ...condition is true
169: break;
170:
171: // write processed body
1.86 ! paf 172: r.write_pass_lang(r.process(body));
1.1 paf 173: }
174: }
175:
1.5 paf 176: static void _use(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 177: Value& vfile=params->as_no_junction(0, "file name must not be code");
1.37 parser 178: r.use_file(vfile.as_string());
1.1 paf 179: }
180:
1.5 paf 181: static void _for(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 182: Pool& pool=r.pool();
1.48 parser 183: const String& var_name=params->as_string(0, "var name must be string");
184: int from=params->as_int(1, "from must be int", r);
185: int to=params->as_int(2, "to must be int", r);
1.34 parser 186: Value& body_code=params->as_junction(3, "body must be code");
1.50 parser 187: Value *delim_maybe_code=params->size()>4?¶ms->get(4):0;
1.1 paf 188:
1.57 paf 189: if(to-from>=MAX_LOOPS) // too long loop?
1.78 paf 190: throw Exception("parser.runtime",
1.57 paf 191: &method_name,
192: "endless loop detected");
193:
1.1 paf 194: bool need_delim=false;
195: VInt *vint=new(pool) VInt(pool, 0);
196: for(int i=from; i<=to; i++) {
197: vint->set_int(i);
1.56 paf 198: r.root->put_element(var_name, vint);
1.1 paf 199:
1.86 ! paf 200: StringOrValue processed_body=r.process(body_code);
1.49 parser 201: if(delim_maybe_code) { // delimiter set?
1.1 paf 202: const String *string=processed_body.get_string();
203: if(need_delim && string && string->size()) // need delim & iteration produced string?
1.86 ! paf 204: r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 205: need_delim=true;
206: }
207: r.write_pass_lang(processed_body);
208: }
209: }
210:
1.15 paf 211: static void _eval(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 212: Value& expr=params->as_junction(0, "need expression");
1.1 paf 213: // evaluate expresion
1.81 paf 214: Value *result=r.process_to_value(expr,
1.83 paf 215: /*0/*no name YET* /,*/
1.1 paf 216: true/*don't intercept string*/).as_expr_result();
1.50 parser 217: if(params->size()>1) {
1.34 parser 218: Value& fmt=params->as_no_junction(1, "fmt must not be code");
1.1 paf 219:
220: Pool& pool=r.pool();
221: String& string=*new(pool) String(pool);
222: string.APPEND_CONST(format(pool, result->as_double(), fmt.as_string().cstr()));
223: result=new(pool) VString(string);
224: }
1.16 paf 225: result->set_name(method_name);
1.1 paf 226: r.write_no_lang(*result);
227: }
228:
1.42 parser 229: static void _connect(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 230: Pool& pool=r.pool();
1.63 paf 231: #ifdef RESOURCES_DEBUG
232: struct timeval mt[2];
233: #endif
1.34 parser 234: Value& url=params->as_no_junction(0, "url must not be code");
235: Value& body_code=params->as_junction(1, "body must be code");
1.1 paf 236:
1.19 parser 237: Table *protocol2driver_and_client=
1.35 parser 238: static_cast<Table *>(r.classes_conf.get(r.OP.name()));
1.11 paf 239:
1.63 paf 240: #ifdef RESOURCES_DEBUG
241: //measure:before
242: gettimeofday(&mt[0],NULL);
243: #endif
1.1 paf 244: // connect
1.67 paf 245: SQL_Connection_ptr connection=SQL_driver_manager->get_connection(
1.42 parser 246: url.as_string(), method_name, protocol2driver_and_client);
1.1 paf 247:
1.63 paf 248: #ifdef RESOURCES_DEBUG
249: //measure:after connect
250: gettimeofday(&mt[1],NULL);
251:
252: double t[2];
253: for(int i=0;i<2;i++)
254: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
255:
256: r.sql_connect_time+=t[1]-t[0];
257: #endif
1.67 paf 258: Temp_connection temp_connection(r, connection.get());
1.1 paf 259: // execute body
1.53 parser 260: try {
1.86 ! paf 261: r.write_assign_lang(r.process(body_code));
1.75 paf 262: } catch(...) { // process problem
1.67 paf 263: connection->mark_to_rollback();
264: /*re*/throw;
1.1 paf 265: }
266: }
267:
1.41 parser 268: #ifndef DOXYGEN
1.28 parser 269: struct Switch_data {
1.82 paf 270: Request *r;
1.28 parser 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) {
1.82 paf 277: Switch_data data={&r, &r.process_to_value(params->get(0))};
1.79 paf 278: Temp_hash_value switch_data_setter(r.classes_conf, *switch_data_name, &data);
1.28 parser 279:
1.83 paf 280: Value& cases_code=params->as_junction(1, "switch cases must be code");
1.82 paf 281: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
282: // because of stacked WWrapper used there as wcontext
1.84 paf 283: r.process(cases_code, true/*intercept_string*/);
1.83 paf 284: if(Value *selected_code=data.found ? data.found : data._default) {
285: // setting code context, would execute in ^switch[...]{>>context<<}
286: selected_code->get_junction()->change_context(cases_code.get_junction());
1.86 ! paf 287: r.write_pass_lang(r.process(*selected_code));
1.83 paf 288: }
1.28 parser 289: }
290:
1.38 parser 291: static void _case(Request& r, const String& method_name, MethodParams *params) {
292: Pool& pool=r.pool();
293:
294: Switch_data *data=static_cast<Switch_data *>(r.classes_conf.get(*switch_data_name));
295: if(!data)
1.78 paf 296: throw Exception("parser.runtime",
1.38 parser 297: &method_name,
298: "without switch");
1.28 parser 299:
300: int count=params->size();
1.34 parser 301: Value *code=¶ms->as_junction(--count, "case result must be code");
1.83 paf 302:
303: // killing context for safety, would execute in ^switch[...]{>>context<<}
304: // reason: context is stacked, and it would become invalid afterwards
305: code->get_junction()->change_context(0);
306:
1.28 parser 307: for(int i=0; i<count; i++) {
1.81 paf 308: Value& value=r.process_to_value(params->get(i));
1.28 parser 309:
1.82 paf 310: if(value.as_string() == CASE_DEFAULT_VALUE) {
1.38 parser 311: data->_default=code;
1.28 parser 312: break;
313: }
314:
315: bool matches;
1.38 parser 316: if(data->searching->is_string())
317: matches=data->searching->as_string() == value.as_string();
1.28 parser 318: else
1.38 parser 319: matches=data->searching->as_double() == value.as_double();
1.28 parser 320:
321: if(matches) {
1.82 paf 322: if(data->found)
323: throw Exception("parser.runtime",
324: &method_name,
325: "duplicate found");
326:
1.38 parser 327: data->found=code;
1.28 parser 328: break;
329: }
330: }
331: }
332:
1.63 paf 333: // cache--
334:
335: // consts
336:
1.79 paf 337: const int DATA_STRING_SERIALIZED_VERSION=0x0002;
1.63 paf 338:
339: // helper types
340:
341: #ifndef DOXYGEN
342: struct Data_string_serialized_prolog {
343: int version;
1.79 paf 344: time_t expires;
1.63 paf 345: };
346: #endif
347:
1.68 paf 348: void cache_delete(const String& file_spec) {
349: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 350: }
1.69 paf 351:
352: #ifndef DOXYGEN
1.79 paf 353: struct Cache_data {
354: time_t expires;
355: };
1.69 paf 356: struct Locked_process_and_cache_put_action_info {
357: Request *r;
1.79 paf 358: Cache_data *data;
1.81 paf 359: Value *body_code; const String *evaluated_body;
1.69 paf 360: };
361: #endif
362: static void locked_process_and_cache_put_action(int f, void *context) {
363: Locked_process_and_cache_put_action_info& info=
364: *static_cast<Locked_process_and_cache_put_action_info *>(context);
365:
366: // body->process
1.81 paf 367: info.evaluated_body=&info.r->process_to_string(*info.body_code);
1.69 paf 368:
1.79 paf 369: // expiration time not spoiled by ^cache(0) or something?
370: if(info.data->expires > time(0)) {
371: // string -serialize> buffer
372: void *data; size_t data_size;
1.81 paf 373: info.evaluated_body->serialize(
1.79 paf 374: sizeof(Data_string_serialized_prolog),
375: data, data_size);
376: Data_string_serialized_prolog& prolog=
377: *static_cast<Data_string_serialized_prolog *>(data);
378: prolog.version=DATA_STRING_SERIALIZED_VERSION;
379: prolog.expires=info.data->expires;
380:
381: // buffer -write> file
382: write(f, data, data_size);
383: } else // expired!
384: info.data->expires=0; // flag it so that could be easily checked by caller
1.69 paf 385: }
1.81 paf 386: const String *locked_process_and_cache_put(Request& r,
1.69 paf 387: Value& body_code,
1.79 paf 388: Cache_data& data,
1.69 paf 389: const String& file_spec) {
390: Locked_process_and_cache_put_action_info info={
391: &r,
1.81 paf 392: &data,
393: &body_code
1.69 paf 394: };
395:
1.81 paf 396: const String *result=file_write_action_under_lock(
1.69 paf 397: file_spec,
398: "cache_put", locked_process_and_cache_put_action, &info,
399: false/*as_text*/,
400: false/*do_append*/,
1.81 paf 401: false/*block*/) ? info.evaluated_body: 0;
1.79 paf 402: if(data.expires==0)
403: cache_delete(file_spec);
404: return result;
1.63 paf 405: }
1.79 paf 406: String *cache_get(Pool& pool, const String& file_spec, time_t now) {
1.63 paf 407: void* data; size_t data_size;
1.72 paf 408: if(file_read(pool, file_spec,
1.63 paf 409: data, data_size,
410: false/*as_text*/,
1.69 paf 411: false/*fail_on_read_problem*/)
1.72 paf 412: && data_size/* ignore reads which are empty due to
413: non-unary open+lockEX conflict with lockSH */) {
1.63 paf 414:
1.72 paf 415: Data_string_serialized_prolog& prolog=
416: *static_cast<Data_string_serialized_prolog *>(data);
1.63 paf 417:
1.72 paf 418: String *result=new(pool) String(pool);
419: if(
420: data_size>=sizeof(Data_string_serialized_prolog)
421: && prolog.version==DATA_STRING_SERIALIZED_VERSION
1.79 paf 422: && prolog.expires > now
1.72 paf 423: && result->deserialize(
424: sizeof(Data_string_serialized_prolog), data, data_size, file_spec.cstr()))
425: return result;
426: }
1.63 paf 427:
1.72 paf 428: return 0;
1.63 paf 429: }
1.79 paf 430: static time_t as_expires(Request& r, const String& method_name, MethodParams *params,
431: int index, time_t now) {
432: time_t result;
433: Value& vlifespan_or_expires=params->get(index);
434: if(strcmp(vlifespan_or_expires.type(), VDATE_TYPE)==0)
435: result=static_cast<VDate&>(vlifespan_or_expires).get_time();
436: else
437: result=now+(time_t)params->as_double(index, "lifespan must be date or number", r);
438:
439: return result;
440: }
441: static const String as_file_spec(Request&r, MethodParams *params, int index) {
442: return r.absolute(params->as_string(index, "filespec must be string"));
443: }
1.63 paf 444: static void _cache(Request& r, const String& method_name, MethodParams *params) {
445: Pool& pool=r.pool();
1.79 paf 446: time_t now=time(0);
447:
448: // ^cache[filename] ^cache(seconds) ^cache[expires date]
449: if(params->size()==1) {
450: if(params->get(0).is_string()) { // filename?
451: cache_delete(as_file_spec(r, params, 0));
452: return;
453: }
454:
455: // secods|expires date
456: Cache_data *data=static_cast<Cache_data *>(r.classes_conf.get(*cache_data_name));
457: if(!data)
458: throw Exception("parser.runtime",
459: &method_name,
460: "expire-time reducing instruction without cache");
461:
462: time_t expires=as_expires(r, method_name, params, 0, now);
463: if(expires < data->expires)
464: data->expires=expires;
465:
466: return;
467: }
1.63 paf 468:
469: // file_spec, expires, body code
1.65 paf 470: const String &file_spec=r.absolute(params->as_string(0, "filespec must be string"));
471:
1.79 paf 472: Cache_data data;
473: Temp_hash_value cache_data_setter(r.classes_conf, *cache_data_name, &data);
474: data.expires=as_expires(r, method_name, params, 1, now);
1.63 paf 475: Value& body_code=params->as_junction(2, "body must be code");
476:
1.79 paf 477: if(data.expires>now) { // valid 'expires' specified? try cached copy...
1.69 paf 478: // hence we don't hope to have unary create/lockEX
479: // we need some plan to live in a life like that, so...
480: // worst races plan:
481: // A B
482: // open
483: // |open
484: // lockSH
485: // |nonblocking-lockEX fails
486: // unlockSH
487: // close, cache_get returns 0
488: // open
489: // nonblocking-lockEX succeeds; process, write, close
490: // |retry1: open
491: // ...
492: // |lockSH succeeds; ...
493:
494: for(int retry=0; retry<2; retry++) {
1.79 paf 495: if(String *cached_body=cache_get(pool, file_spec, now)) { // have cached copy?
496: // write it out
497: r.write_assign_lang(*cached_body);
498: // happy with it
499: return;
500: }
1.69 paf 501:
502: // non-blocked lock; process; cache it
1.81 paf 503: if(const String*processed_body=
504: locked_process_and_cache_put(r, body_code, data, file_spec)) {
1.63 paf 505: // write it out
1.69 paf 506: r.write_assign_lang(*processed_body);
1.63 paf 507: // happy with it
508: return;
1.69 paf 509: } else { // somebody writing result right now
510: pa_sleep(0, 500000); // waiting half a second
511: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 512: }
1.69 paf 513: }
1.78 paf 514: throw Exception(0,
1.69 paf 515: &file_spec,
516: "locking problem");
517: } else {
1.79 paf 518: // instructed not to cache; forget cached copy
1.68 paf 519: cache_delete(file_spec);
1.69 paf 520: // process
1.81 paf 521: const String& processed_body=r.process_to_string(body_code);
1.69 paf 522: // write it out
523: r.write_assign_lang(processed_body);
524: // happy with it
525: return;
526: }
527: // never reached
1.63 paf 528: }
529:
1.74 paf 530: // also used in pa_request.C to pass param to @unhandled_exception
531: VHash& exception2vhash(Pool& pool, const Exception& e) {
532: VHash& result=*new(pool) VHash(pool);
533: Hash& hash=result.hash(0);
1.78 paf 534: if(const char *type=e.type())
535: hash.put(*exception_type_part_name, new(pool) VString(*new(pool) String(pool, type)));
1.76 paf 536: if(const String *asource=e.problem_source()) {
537: String& source=*new(pool) String(pool);
538: source.append(*asource, String::UL_TAINTED, true/*forced*/);
539: result.set_name(source);
1.74 paf 540:
1.76 paf 541: hash.put(*exception_source_part_name, new(pool) VString(source));
1.74 paf 542: #ifndef NO_STRING_ORIGIN
1.76 paf 543: const Origin& origin=source.origin();
1.74 paf 544: hash.put(*new(pool) String(pool, "file"),
545: new(pool) VString(*new(pool) String(pool, origin.file)));
546: hash.put(*new(pool) String(pool, "lineno"),
547: new(pool) VInt(pool, 1+origin.line));
548: #endif
549: }
550: if(const char *ecomment=e.comment()) {
551: int comment_size=strlen(ecomment);
552: char *pcomment=(char *)pool.malloc(comment_size);
553: memcpy(pcomment, ecomment, comment_size);
554: hash.put(*exception_comment_part_name,
1.76 paf 555: new(pool) VString(*new(pool) String(pool, pcomment, comment_size, true/*tainted*/)));
1.74 paf 556: }
557: hash.put(*exception_handled_part_name,
558: new(pool) VBool(pool, false));
559:
560: return result;
561: }
562:
563: static void _try_operator(Request& r, const String& method_name, MethodParams *params) {
564: Pool& pool=r.pool();
565:
566: Value& body_code=params->as_junction(0, "body_code must be code");
567: Value& catch_code=params->as_junction(1, "catch_code must be code");
568:
1.86 ! paf 569: StringOrValue result;
1.74 paf 570:
571: // taking snapshot of request processing status
1.77 paf 572: //int ssexception_trace=r.exception_trace.top_index();
573: int sstack=r.stack.top_index();
1.74 paf 574: Value *sself=r.self, *sroot=r.root, *srcontext=r.rcontext;
575: WContext *swcontext=r.wcontext;
576: try {
1.86 ! paf 577: result=r.process(body_code);
1.74 paf 578: } catch(const Exception& e) {
579: // restoring request processing status
1.77 paf 580: //r.exception_trace.top_index(ssexception_trace);
581: r.stack.top_index(sstack);
1.74 paf 582: r.self=sself; r.root=sroot, r.rcontext=srcontext; r.wcontext=swcontext;
1.77 paf 583:
1.74 paf 584:
585: VHash& vhash=exception2vhash(pool, e);
586:
587: Junction *junction=catch_code.get_junction();
588: Value *saved_exception_var_value=junction->root->get_element(*exception_var_name);
589: junction->root->put_element(*exception_var_name, &vhash);
1.86 ! paf 590: result=r.process(catch_code);
1.74 paf 591: bool handled=false;
592: if(Value *value=static_cast<Value *>(vhash.hash(0).get(*exception_handled_part_name)))
593: handled=value->as_bool();
594: junction->root->put_element(*exception_var_name, saved_exception_var_value);
595:
596: if(!handled)
597: throw(e); // rethrow
598: }
599: // write it out
1.86 ! paf 600: r.write_pass_lang(result);
1.74 paf 601: }
602:
603: static void _throw_operator(Request& r, const String& method_name, MethodParams *params) {
604: Pool& pool=r.pool();
605:
606: if(params->size()==1) {
607: Value& param0=params->get(0);
608: if(Hash *hash=param0.get_hash(&method_name)) {
1.78 paf 609: const char *type=0;
1.74 paf 610: if(Value *value=static_cast<Value *>(hash->get(*exception_type_part_name)))
1.78 paf 611: type=value->as_string().cstr();
1.74 paf 612: const String *source=0;
613: if(Value *value=static_cast<Value *>(hash->get(*exception_source_part_name)))
614: source=&value->as_string();
615: const char *comment=0;
616: if(Value *value=
617: static_cast<Value *>(hash->get(*exception_comment_part_name)))
618: comment=value->as_string().cstr();
619:
1.78 paf 620: throw Exception(type,
1.74 paf 621: source?source:&method_name,
622: comment);
623: } else
1.78 paf 624: throw Exception("parser.runtime",
1.74 paf 625: &method_name,
626: "one-param version has hash param");
627: } else {
1.78 paf 628: const char *type=params->as_string(0, "type must be string").cstr();
1.74 paf 629: const String& source=params->as_string(1, "source must be string");
630: const char *comment=params->as_string(2, "comment must be string").cstr();
1.78 paf 631: throw Exception(type, &source, comment);
1.74 paf 632: }
633: }
634:
1.10 paf 635: // constructor
636:
1.11 paf 637: MOP::MOP(Pool& apool) : Methoded(apool),
638: main_sql_name(apool, MAIN_SQL_NAME),
639: main_sql_drivers_name(apool, MAIN_SQL_DRIVERS_NAME)
640: {
1.10 paf 641: set_name(*NEW String(pool(), OP_CLASS_NAME));
1.28 parser 642:
1.1 paf 643: // ^if(condition){code-when-true}
644: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 645: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 646:
647: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 648: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 649:
650: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 651: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 652:
653: // ^process[code]
1.10 paf 654: add_native_method("process", Method::CT_ANY, _process, 1, 1);
1.1 paf 655:
656: // ^rem{code}
1.51 parser 657: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 658:
659: // ^while(condition){code}
1.10 paf 660: add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.1 paf 661:
662: // ^use[file]
1.10 paf 663: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 664:
1.54 paf 665: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 666: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 667:
668: // ^eval(expr)
669: // ^eval(expr)[format]
1.10 paf 670: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 671:
1.1 paf 672: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 673: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
674:
1.63 paf 675:
1.65 paf 676: // ^cache[file_spec] delete cache
1.63 paf 677: // ^cache[file_spec](time){code} time=0 no cache
1.65 paf 678: add_native_method("cache", Method::CT_ANY, _cache, 1, 3);
1.63 paf 679:
1.28 parser 680: // switch
681:
682: // ^switch[value]{cases}
683: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
684:
685: // ^case[value]{code}
1.51 parser 686: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 687:
688: // try-catch
689:
690: // ^try{code}{catch code}
691: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
692: // ^throw[$exception hash]
693: // ^throw[type;source;comment]
694: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
695:
1.10 paf 696: }
1.11 paf 697:
698: // constructor & configurator
1.1 paf 699:
1.10 paf 700: Methoded *MOP_create(Pool& pool) {
1.35 parser 701: return new(pool) MOP(pool);
1.11 paf 702: }
703:
704: void MOP::configure_user(Request& r) {
705: Pool& pool=r.pool();
706:
707: // $MAIN:SQL.drivers
708: if(Value *sql=r.main_class->get_element(main_sql_name))
709: if(Value *element=sql->get_element(main_sql_drivers_name))
710: if(Table *protocol2library=element->get_table())
711: r.classes_conf.put(name(), protocol2library);
1.1 paf 712: }
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