Annotation of parser3/src/classes/op.C, revision 1.83
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:
1.83 ! paf 7: $Id: op.C,v 1.82 2002/04/15 06:45:55 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)
1.81 paf 49: r.write_pass_lang(r.process_to_value(params->as_junction(1, "'then' parameter must be code")));
1.50 parser 50: else if(params->size()>2)
1.81 paf 51: r.write_pass_lang(r.process_to_value(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;
1.81 paf 73: r.write_pass_lang(r.process_to_value(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
127: const String& source=
1.81 paf 128: r.process_to_string(params->as_junction(0, "body must be code"));
1.1 paf 129:
130: // process source code, append processed methods to 'self' class
131: // maybe-define new @main
1.67 paf 132: r.use_buf(
133: source.cstr(String::UL_UNSPECIFIED, r.connection(0)),
134: place,
135: &self_class);
1.1 paf 136:
1.73 paf 137: // main_method
138: main_method=self_class.get_method(*main_method_name);
139: }
140: // after restoring current-request-lang
141: // maybe-execute @main[]
142: if(main_method) {
143: // execute!
144: r.execute(*main_method->parser_code);
1.1 paf 145: }
146: }
147:
1.5 paf 148: static void _rem(Request& r, const String&, MethodParams *params) {
1.34 parser 149: params->as_junction(0, "body must be code");
1.1 paf 150: }
151:
1.5 paf 152: static void _while(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 153: Pool& pool=r.pool();
154:
1.34 parser 155: Value& vcondition=params->as_junction(0, "condition must be expression");
156: Value& body=params->as_junction(1, "body must be code");
1.1 paf 157:
158: // while...
159: int endless_loop_count=0;
160: while(true) {
1.18 parser 161: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.78 paf 162: throw Exception("parser.runtime",
1.1 paf 163: &method_name,
164: "endless loop detected");
165:
166: bool condition=
1.81 paf 167: r.process_to_value(
1.1 paf 168: vcondition,
1.83 ! paf 169: /*0/*no name* /,*/
1.1 paf 170: false/*don't intercept string*/).as_bool();
171: if(!condition) // ...condition is true
172: break;
173:
174: // write processed body
1.81 paf 175: r.write_pass_lang(r.process_to_value(body));
1.1 paf 176: }
177: }
178:
1.5 paf 179: static void _use(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 180: Value& vfile=params->as_no_junction(0, "file name must not be code");
1.37 parser 181: r.use_file(vfile.as_string());
1.1 paf 182: }
183:
1.5 paf 184: static void _for(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 185: Pool& pool=r.pool();
1.48 parser 186: const String& var_name=params->as_string(0, "var name must be string");
187: int from=params->as_int(1, "from must be int", r);
188: int to=params->as_int(2, "to must be int", r);
1.34 parser 189: Value& body_code=params->as_junction(3, "body must be code");
1.50 parser 190: Value *delim_maybe_code=params->size()>4?¶ms->get(4):0;
1.1 paf 191:
1.57 paf 192: if(to-from>=MAX_LOOPS) // too long loop?
1.78 paf 193: throw Exception("parser.runtime",
1.57 paf 194: &method_name,
195: "endless loop detected");
196:
1.1 paf 197: bool need_delim=false;
198: VInt *vint=new(pool) VInt(pool, 0);
199: for(int i=from; i<=to; i++) {
200: vint->set_int(i);
1.56 paf 201: r.root->put_element(var_name, vint);
1.1 paf 202:
1.81 paf 203: Value& processed_body=r.process_to_value(body_code);
1.49 parser 204: if(delim_maybe_code) { // delimiter set?
1.1 paf 205: const String *string=processed_body.get_string();
206: if(need_delim && string && string->size()) // need delim & iteration produced string?
1.81 paf 207: r.write_pass_lang(r.process_to_string(*delim_maybe_code));
1.1 paf 208: need_delim=true;
209: }
210: r.write_pass_lang(processed_body);
211: }
212: }
213:
1.15 paf 214: static void _eval(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 215: Value& expr=params->as_junction(0, "need expression");
1.1 paf 216: // evaluate expresion
1.81 paf 217: Value *result=r.process_to_value(expr,
1.83 ! paf 218: /*0/*no name YET* /,*/
1.1 paf 219: true/*don't intercept string*/).as_expr_result();
1.50 parser 220: if(params->size()>1) {
1.34 parser 221: Value& fmt=params->as_no_junction(1, "fmt must not be code");
1.1 paf 222:
223: Pool& pool=r.pool();
224: String& string=*new(pool) String(pool);
225: string.APPEND_CONST(format(pool, result->as_double(), fmt.as_string().cstr()));
226: result=new(pool) VString(string);
227: }
1.16 paf 228: result->set_name(method_name);
1.1 paf 229: r.write_no_lang(*result);
230: }
231:
1.42 parser 232: static void _connect(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 233: Pool& pool=r.pool();
1.63 paf 234: #ifdef RESOURCES_DEBUG
235: struct timeval mt[2];
236: #endif
1.34 parser 237: Value& url=params->as_no_junction(0, "url must not be code");
238: Value& body_code=params->as_junction(1, "body must be code");
1.1 paf 239:
1.19 parser 240: Table *protocol2driver_and_client=
1.35 parser 241: static_cast<Table *>(r.classes_conf.get(r.OP.name()));
1.11 paf 242:
1.63 paf 243: #ifdef RESOURCES_DEBUG
244: //measure:before
245: gettimeofday(&mt[0],NULL);
246: #endif
1.1 paf 247: // connect
1.67 paf 248: SQL_Connection_ptr connection=SQL_driver_manager->get_connection(
1.42 parser 249: url.as_string(), method_name, protocol2driver_and_client);
1.1 paf 250:
1.63 paf 251: #ifdef RESOURCES_DEBUG
252: //measure:after connect
253: gettimeofday(&mt[1],NULL);
254:
255: double t[2];
256: for(int i=0;i<2;i++)
257: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
258:
259: r.sql_connect_time+=t[1]-t[0];
260: #endif
1.67 paf 261: Temp_connection temp_connection(r, connection.get());
1.1 paf 262: // execute body
1.53 parser 263: try {
1.81 paf 264: r.write_assign_lang(r.process_to_value(body_code));
1.75 paf 265: } catch(...) { // process problem
1.67 paf 266: connection->mark_to_rollback();
267: /*re*/throw;
1.1 paf 268: }
269: }
270:
1.41 parser 271: #ifndef DOXYGEN
1.28 parser 272: struct Switch_data {
1.82 paf 273: Request *r;
1.28 parser 274: Value *searching;
275: Value *found;
276: Value *_default;
277: };
1.41 parser 278: #endif
1.28 parser 279: static void _switch(Request& r, const String&, MethodParams *params) {
1.82 paf 280: Switch_data data={&r, &r.process_to_value(params->get(0))};
1.79 paf 281: Temp_hash_value switch_data_setter(r.classes_conf, *switch_data_name, &data);
1.28 parser 282:
1.83 ! paf 283: Value& cases_code=params->as_junction(1, "switch cases must be code");
1.82 paf 284: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
285: // because of stacked WWrapper used there as wcontext
1.83 ! paf 286: r.process(
! 287: cases_code,
! 288: true/*intercept_string*/
1.82 paf 289: );
1.83 ! paf 290: if(Value *selected_code=data.found ? data.found : data._default) {
! 291: // setting code context, would execute in ^switch[...]{>>context<<}
! 292: selected_code->get_junction()->change_context(cases_code.get_junction());
! 293: r.write_pass_lang(r.process_to_value(*selected_code));
! 294: }
1.28 parser 295: }
296:
1.38 parser 297: static void _case(Request& r, const String& method_name, MethodParams *params) {
298: Pool& pool=r.pool();
299:
300: Switch_data *data=static_cast<Switch_data *>(r.classes_conf.get(*switch_data_name));
301: if(!data)
1.78 paf 302: throw Exception("parser.runtime",
1.38 parser 303: &method_name,
304: "without switch");
1.28 parser 305:
306: int count=params->size();
1.34 parser 307: Value *code=¶ms->as_junction(--count, "case result must be code");
1.83 ! paf 308:
! 309: // killing context for safety, would execute in ^switch[...]{>>context<<}
! 310: // reason: context is stacked, and it would become invalid afterwards
! 311: code->get_junction()->change_context(0);
! 312:
1.28 parser 313: for(int i=0; i<count; i++) {
1.81 paf 314: Value& value=r.process_to_value(params->get(i));
1.28 parser 315:
1.82 paf 316: if(value.as_string() == CASE_DEFAULT_VALUE) {
1.38 parser 317: data->_default=code;
1.28 parser 318: break;
319: }
320:
321: bool matches;
1.38 parser 322: if(data->searching->is_string())
323: matches=data->searching->as_string() == value.as_string();
1.28 parser 324: else
1.38 parser 325: matches=data->searching->as_double() == value.as_double();
1.28 parser 326:
327: if(matches) {
1.82 paf 328: if(data->found)
329: throw Exception("parser.runtime",
330: &method_name,
331: "duplicate found");
332:
1.38 parser 333: data->found=code;
1.28 parser 334: break;
335: }
336: }
337: }
338:
1.63 paf 339: // cache--
340:
341: // consts
342:
1.79 paf 343: const int DATA_STRING_SERIALIZED_VERSION=0x0002;
1.63 paf 344:
345: // helper types
346:
347: #ifndef DOXYGEN
348: struct Data_string_serialized_prolog {
349: int version;
1.79 paf 350: time_t expires;
1.63 paf 351: };
352: #endif
353:
1.68 paf 354: void cache_delete(const String& file_spec) {
355: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 356: }
1.69 paf 357:
358: #ifndef DOXYGEN
1.79 paf 359: struct Cache_data {
360: time_t expires;
361: };
1.69 paf 362: struct Locked_process_and_cache_put_action_info {
363: Request *r;
1.79 paf 364: Cache_data *data;
1.81 paf 365: Value *body_code; const String *evaluated_body;
1.69 paf 366: };
367: #endif
368: static void locked_process_and_cache_put_action(int f, void *context) {
369: Locked_process_and_cache_put_action_info& info=
370: *static_cast<Locked_process_and_cache_put_action_info *>(context);
371:
372: // body->process
1.81 paf 373: info.evaluated_body=&info.r->process_to_string(*info.body_code);
1.69 paf 374:
1.79 paf 375: // expiration time not spoiled by ^cache(0) or something?
376: if(info.data->expires > time(0)) {
377: // string -serialize> buffer
378: void *data; size_t data_size;
1.81 paf 379: info.evaluated_body->serialize(
1.79 paf 380: sizeof(Data_string_serialized_prolog),
381: data, data_size);
382: Data_string_serialized_prolog& prolog=
383: *static_cast<Data_string_serialized_prolog *>(data);
384: prolog.version=DATA_STRING_SERIALIZED_VERSION;
385: prolog.expires=info.data->expires;
386:
387: // buffer -write> file
388: write(f, data, data_size);
389: } else // expired!
390: info.data->expires=0; // flag it so that could be easily checked by caller
1.69 paf 391: }
1.81 paf 392: const String *locked_process_and_cache_put(Request& r,
1.69 paf 393: Value& body_code,
1.79 paf 394: Cache_data& data,
1.69 paf 395: const String& file_spec) {
396: Locked_process_and_cache_put_action_info info={
397: &r,
1.81 paf 398: &data,
399: &body_code
1.69 paf 400: };
401:
1.81 paf 402: const String *result=file_write_action_under_lock(
1.69 paf 403: file_spec,
404: "cache_put", locked_process_and_cache_put_action, &info,
405: false/*as_text*/,
406: false/*do_append*/,
1.81 paf 407: false/*block*/) ? info.evaluated_body: 0;
1.79 paf 408: if(data.expires==0)
409: cache_delete(file_spec);
410: return result;
1.63 paf 411: }
1.79 paf 412: String *cache_get(Pool& pool, const String& file_spec, time_t now) {
1.63 paf 413: void* data; size_t data_size;
1.72 paf 414: if(file_read(pool, file_spec,
1.63 paf 415: data, data_size,
416: false/*as_text*/,
1.69 paf 417: false/*fail_on_read_problem*/)
1.72 paf 418: && data_size/* ignore reads which are empty due to
419: non-unary open+lockEX conflict with lockSH */) {
1.63 paf 420:
1.72 paf 421: Data_string_serialized_prolog& prolog=
422: *static_cast<Data_string_serialized_prolog *>(data);
1.63 paf 423:
1.72 paf 424: String *result=new(pool) String(pool);
425: if(
426: data_size>=sizeof(Data_string_serialized_prolog)
427: && prolog.version==DATA_STRING_SERIALIZED_VERSION
1.79 paf 428: && prolog.expires > now
1.72 paf 429: && result->deserialize(
430: sizeof(Data_string_serialized_prolog), data, data_size, file_spec.cstr()))
431: return result;
432: }
1.63 paf 433:
1.72 paf 434: return 0;
1.63 paf 435: }
1.79 paf 436: static time_t as_expires(Request& r, const String& method_name, MethodParams *params,
437: int index, time_t now) {
438: time_t result;
439: Value& vlifespan_or_expires=params->get(index);
440: if(strcmp(vlifespan_or_expires.type(), VDATE_TYPE)==0)
441: result=static_cast<VDate&>(vlifespan_or_expires).get_time();
442: else
443: result=now+(time_t)params->as_double(index, "lifespan must be date or number", r);
444:
445: return result;
446: }
447: static const String as_file_spec(Request&r, MethodParams *params, int index) {
448: return r.absolute(params->as_string(index, "filespec must be string"));
449: }
1.63 paf 450: static void _cache(Request& r, const String& method_name, MethodParams *params) {
451: Pool& pool=r.pool();
1.79 paf 452: time_t now=time(0);
453:
454: // ^cache[filename] ^cache(seconds) ^cache[expires date]
455: if(params->size()==1) {
456: if(params->get(0).is_string()) { // filename?
457: cache_delete(as_file_spec(r, params, 0));
458: return;
459: }
460:
461: // secods|expires date
462: Cache_data *data=static_cast<Cache_data *>(r.classes_conf.get(*cache_data_name));
463: if(!data)
464: throw Exception("parser.runtime",
465: &method_name,
466: "expire-time reducing instruction without cache");
467:
468: time_t expires=as_expires(r, method_name, params, 0, now);
469: if(expires < data->expires)
470: data->expires=expires;
471:
472: return;
473: }
1.63 paf 474:
475: // file_spec, expires, body code
1.65 paf 476: const String &file_spec=r.absolute(params->as_string(0, "filespec must be string"));
477:
1.79 paf 478: Cache_data data;
479: Temp_hash_value cache_data_setter(r.classes_conf, *cache_data_name, &data);
480: data.expires=as_expires(r, method_name, params, 1, now);
1.63 paf 481: Value& body_code=params->as_junction(2, "body must be code");
482:
1.79 paf 483: if(data.expires>now) { // valid 'expires' specified? try cached copy...
1.69 paf 484: // hence we don't hope to have unary create/lockEX
485: // we need some plan to live in a life like that, so...
486: // worst races plan:
487: // A B
488: // open
489: // |open
490: // lockSH
491: // |nonblocking-lockEX fails
492: // unlockSH
493: // close, cache_get returns 0
494: // open
495: // nonblocking-lockEX succeeds; process, write, close
496: // |retry1: open
497: // ...
498: // |lockSH succeeds; ...
499:
500: for(int retry=0; retry<2; retry++) {
1.79 paf 501: if(String *cached_body=cache_get(pool, file_spec, now)) { // have cached copy?
502: // write it out
503: r.write_assign_lang(*cached_body);
504: // happy with it
505: return;
506: }
1.69 paf 507:
508: // non-blocked lock; process; cache it
1.81 paf 509: if(const String*processed_body=
510: locked_process_and_cache_put(r, body_code, data, file_spec)) {
1.63 paf 511: // write it out
1.69 paf 512: r.write_assign_lang(*processed_body);
1.63 paf 513: // happy with it
514: return;
1.69 paf 515: } else { // somebody writing result right now
516: pa_sleep(0, 500000); // waiting half a second
517: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 518: }
1.69 paf 519: }
1.78 paf 520: throw Exception(0,
1.69 paf 521: &file_spec,
522: "locking problem");
523: } else {
1.79 paf 524: // instructed not to cache; forget cached copy
1.68 paf 525: cache_delete(file_spec);
1.69 paf 526: // process
1.81 paf 527: const String& processed_body=r.process_to_string(body_code);
1.69 paf 528: // write it out
529: r.write_assign_lang(processed_body);
530: // happy with it
531: return;
532: }
533: // never reached
1.63 paf 534: }
535:
1.74 paf 536: // also used in pa_request.C to pass param to @unhandled_exception
537: VHash& exception2vhash(Pool& pool, const Exception& e) {
538: VHash& result=*new(pool) VHash(pool);
539: Hash& hash=result.hash(0);
1.78 paf 540: if(const char *type=e.type())
541: hash.put(*exception_type_part_name, new(pool) VString(*new(pool) String(pool, type)));
1.76 paf 542: if(const String *asource=e.problem_source()) {
543: String& source=*new(pool) String(pool);
544: source.append(*asource, String::UL_TAINTED, true/*forced*/);
545: result.set_name(source);
1.74 paf 546:
1.76 paf 547: hash.put(*exception_source_part_name, new(pool) VString(source));
1.74 paf 548: #ifndef NO_STRING_ORIGIN
1.76 paf 549: const Origin& origin=source.origin();
1.74 paf 550: hash.put(*new(pool) String(pool, "file"),
551: new(pool) VString(*new(pool) String(pool, origin.file)));
552: hash.put(*new(pool) String(pool, "lineno"),
553: new(pool) VInt(pool, 1+origin.line));
554: #endif
555: }
556: if(const char *ecomment=e.comment()) {
557: int comment_size=strlen(ecomment);
558: char *pcomment=(char *)pool.malloc(comment_size);
559: memcpy(pcomment, ecomment, comment_size);
560: hash.put(*exception_comment_part_name,
1.76 paf 561: new(pool) VString(*new(pool) String(pool, pcomment, comment_size, true/*tainted*/)));
1.74 paf 562: }
563: hash.put(*exception_handled_part_name,
564: new(pool) VBool(pool, false));
565:
566: return result;
567: }
568:
569: static void _try_operator(Request& r, const String& method_name, MethodParams *params) {
570: Pool& pool=r.pool();
571:
572: Value& body_code=params->as_junction(0, "body_code must be code");
573: Value& catch_code=params->as_junction(1, "catch_code must be code");
574:
575: Value *result;
576:
577: // taking snapshot of request processing status
1.77 paf 578: //int ssexception_trace=r.exception_trace.top_index();
579: int sstack=r.stack.top_index();
1.74 paf 580: Value *sself=r.self, *sroot=r.root, *srcontext=r.rcontext;
581: WContext *swcontext=r.wcontext;
582: try {
1.81 paf 583: result=&r.process_to_value(body_code);
1.74 paf 584: } catch(const Exception& e) {
585: // restoring request processing status
1.77 paf 586: //r.exception_trace.top_index(ssexception_trace);
587: r.stack.top_index(sstack);
1.74 paf 588: r.self=sself; r.root=sroot, r.rcontext=srcontext; r.wcontext=swcontext;
1.77 paf 589:
1.74 paf 590:
591: VHash& vhash=exception2vhash(pool, e);
592:
593: Junction *junction=catch_code.get_junction();
594: Value *saved_exception_var_value=junction->root->get_element(*exception_var_name);
595: junction->root->put_element(*exception_var_name, &vhash);
1.81 paf 596: result=&r.process_to_value(catch_code);
1.74 paf 597: bool handled=false;
598: if(Value *value=static_cast<Value *>(vhash.hash(0).get(*exception_handled_part_name)))
599: handled=value->as_bool();
600: junction->root->put_element(*exception_var_name, saved_exception_var_value);
601:
602: if(!handled)
603: throw(e); // rethrow
604: }
605: // write it out
606: r.write_pass_lang(*result);
607: }
608:
609: static void _throw_operator(Request& r, const String& method_name, MethodParams *params) {
610: Pool& pool=r.pool();
611:
612: if(params->size()==1) {
613: Value& param0=params->get(0);
614: if(Hash *hash=param0.get_hash(&method_name)) {
1.78 paf 615: const char *type=0;
1.74 paf 616: if(Value *value=static_cast<Value *>(hash->get(*exception_type_part_name)))
1.78 paf 617: type=value->as_string().cstr();
1.74 paf 618: const String *source=0;
619: if(Value *value=static_cast<Value *>(hash->get(*exception_source_part_name)))
620: source=&value->as_string();
621: const char *comment=0;
622: if(Value *value=
623: static_cast<Value *>(hash->get(*exception_comment_part_name)))
624: comment=value->as_string().cstr();
625:
1.78 paf 626: throw Exception(type,
1.74 paf 627: source?source:&method_name,
628: comment);
629: } else
1.78 paf 630: throw Exception("parser.runtime",
1.74 paf 631: &method_name,
632: "one-param version has hash param");
633: } else {
1.78 paf 634: const char *type=params->as_string(0, "type must be string").cstr();
1.74 paf 635: const String& source=params->as_string(1, "source must be string");
636: const char *comment=params->as_string(2, "comment must be string").cstr();
1.78 paf 637: throw Exception(type, &source, comment);
1.74 paf 638: }
639: }
640:
1.10 paf 641: // constructor
642:
1.11 paf 643: MOP::MOP(Pool& apool) : Methoded(apool),
644: main_sql_name(apool, MAIN_SQL_NAME),
645: main_sql_drivers_name(apool, MAIN_SQL_DRIVERS_NAME)
646: {
1.10 paf 647: set_name(*NEW String(pool(), OP_CLASS_NAME));
1.28 parser 648:
1.1 paf 649: // ^if(condition){code-when-true}
650: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 651: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 652:
653: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 654: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 655:
656: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 657: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 658:
659: // ^process[code]
1.10 paf 660: add_native_method("process", Method::CT_ANY, _process, 1, 1);
1.1 paf 661:
662: // ^rem{code}
1.51 parser 663: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 664:
665: // ^while(condition){code}
1.10 paf 666: add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.1 paf 667:
668: // ^use[file]
1.10 paf 669: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 670:
1.54 paf 671: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 672: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 673:
674: // ^eval(expr)
675: // ^eval(expr)[format]
1.10 paf 676: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 677:
1.1 paf 678: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 679: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
680:
1.63 paf 681:
1.65 paf 682: // ^cache[file_spec] delete cache
1.63 paf 683: // ^cache[file_spec](time){code} time=0 no cache
1.65 paf 684: add_native_method("cache", Method::CT_ANY, _cache, 1, 3);
1.63 paf 685:
1.28 parser 686: // switch
687:
688: // ^switch[value]{cases}
689: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
690:
691: // ^case[value]{code}
1.51 parser 692: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 693:
694: // try-catch
695:
696: // ^try{code}{catch code}
697: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
698: // ^throw[$exception hash]
699: // ^throw[type;source;comment]
700: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
701:
1.10 paf 702: }
1.11 paf 703:
704: // constructor & configurator
1.1 paf 705:
1.10 paf 706: Methoded *MOP_create(Pool& pool) {
1.35 parser 707: return new(pool) MOP(pool);
1.11 paf 708: }
709:
710: void MOP::configure_user(Request& r) {
711: Pool& pool=r.pool();
712:
713: // $MAIN:SQL.drivers
714: if(Value *sql=r.main_class->get_element(main_sql_name))
715: if(Value *element=sql->get_element(main_sql_drivers_name))
716: if(Table *protocol2library=element->get_table())
717: r.classes_conf.put(name(), protocol2library);
1.1 paf 718: }
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