Annotation of parser3/src/classes/op.C, revision 1.117
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)
1.98 paf 6: */
1.1 paf 7:
1.117 ! paf 8: static const char* IDENT_OP_C="$Date: 2002/10/15 09:42:41 $";
1.1 paf 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"
1.105 paf 16: #include "pa_vmethod_frame.h"
1.1 paf 17:
1.18 parser 18: // limits
19:
20: #define MAX_LOOPS 10000
21:
1.10 paf 22: // defines
23:
1.82 paf 24: #define CASE_DEFAULT_VALUE "DEFAULT"
1.11 paf 25:
1.10 paf 26: // class
27:
1.113 paf 28: class VClassMAIN: public VClass {
1.10 paf 29: public:
1.113 paf 30: VClassMAIN(Pool& apool);
1.10 paf 31: };
32:
33: // methods
34:
1.5 paf 35: static void _if(Request& r, const String&, MethodParams *params) {
1.48 parser 36: Value& condition_code=params->as_junction(0, "condition must be expression");
1.1 paf 37:
1.81 paf 38: bool condition=r.process_to_value(condition_code,
1.83 paf 39: /*0/*no name* /,*/
1.1 paf 40: false/*don't intercept string*/).as_bool();
1.6 paf 41: if(condition)
1.85 paf 42: r.write_pass_lang(r.process(params->as_junction(1, "'then' parameter must be code")));
1.50 parser 43: else if(params->size()>2)
1.85 paf 44: r.write_pass_lang(r.process(params->as_junction(2, "'else' parameter must be code")));
1.1 paf 45: }
46:
1.5 paf 47: static void _untaint(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 48: Pool& pool=r.pool();
49:
1.60 paf 50: uchar lang;
1.59 paf 51: if(params->size()==1)
52: lang=String::UL_AS_IS; // mark as simply 'tainted'. useful in html from sql
53: else {
54: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 55: lang=untaint_lang_name2enum->get_int(lang_name);
1.59 paf 56: if(!lang)
1.78 paf 57: throw Exception(0,
1.59 paf 58: &lang_name,
59: "invalid taint language");
60: }
1.1 paf 61:
62: {
1.59 paf 63: Value& vbody=params->as_junction(params->size()-1, "body must be code");
1.1 paf 64:
65: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.86 paf 66: r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang
1.1 paf 67: }
68: }
69:
1.5 paf 70: static void _taint(Request& r, const String&, MethodParams *params) {
1.1 paf 71: Pool& pool=r.pool();
72:
1.60 paf 73: uchar lang;
1.1 paf 74: if(params->size()==1)
75: lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set
76: else {
1.48 parser 77: const String& lang_name=params->as_string(0, "lang must be string");
1.60 paf 78: lang=untaint_lang_name2enum->get_int(lang_name);
1.1 paf 79: if(!lang)
1.78 paf 80: throw Exception(0,
1.3 paf 81: &lang_name,
82: "invalid taint language");
1.1 paf 83: }
84:
85: {
1.34 parser 86: Value& vbody=params->as_no_junction(params->size()-1, "body must not be code");
1.1 paf 87:
1.90 paf 88: String& result=*new(pool) String(pool);
1.1 paf 89: result.append(
90: vbody.as_string(), // process marking tainted with that lang
91: lang, true); // force result language to specified
92: r.write_pass_lang(result);
93: }
94: }
95:
1.5 paf 96: static void _process(Request& r, const String& method_name, MethodParams *params) {
1.97 paf 97: Pool& pool=r.pool();
1.73 paf 98: const Method *main_method;
1.1 paf 99: {
1.116 paf 100: Value& vjunction=params->as_junction(params->size()-1, "body must be code");
1.114 paf 101:
1.116 paf 102: Value *vtarget;
103: vtarget=params->size()>1?
104: ¶ms->as_no_junction(0, "target must not be code")
105: :r.get_method_frame()->caller();
106: if(!vtarget)
107: throw Exception("parser.runtime",
1.114 paf 108: &method_name,
1.116 paf 109: "no caller"); // can't be, somebody really called ^process
1.114 paf 110:
1.116 paf 111: VStateless_class *target_class=vtarget->get_class();
112: if(!target_class)
113: throw Exception("parser.runtime",
114: &method_name,
115: "no target class");
116:
1.114 paf 117: // evaluate source to process
118: const String& source=r.process_to_string(vjunction);
119:
1.73 paf 120: // temporary remove language change
121: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.1 paf 122: // temporary zero @main so to maybe-replace it in processed code
1.116 paf 123: Temp_method temp_method_main(*target_class, r.main_method_name, 0);
1.1 paf 124: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
1.116 paf 125: Temp_method temp_method_auto(*target_class, *auto_method_name, 0);
1.1 paf 126:
1.101 paf 127: // calculate pseudo file name of processed chars
128: // would be something like "/some/file(4) process"
129: char local_place[MAX_STRING];
130: #ifndef NO_STRING_ORIGIN
131: const Origin& source_origin=source.origin();
132: const Origin& method_origin=method_name.origin();
133: size_t place_size;
134: if(source_origin.file==method_origin.file)
135: place_size=snprintf(local_place, MAX_STRING, "%s(%d) %s", // same file
136: source_origin.file?source_origin.file:"unknown_file", 1+source_origin.line,
137: method_name.cstr())+1;
138: else // different files ^process{external__file_text__or__sql}
139: place_size=snprintf(local_place, MAX_STRING, "%s",
140: source_origin.file?source_origin.file:"unknown_file")+1;
141: #else
142: strncpy(local_place, method_name.cstr(), MAX_STRING-1); place[MAX_STRING-1]=0;
143: size_t place_size=strlen(local_place)+1;
144: #endif
145: char *heap_place=(char *)r.malloc(place_size);
146: memcpy(heap_place, local_place, place_size);
1.1 paf 147:
148: // process source code, append processed methods to 'self' class
149: // maybe-define new @main
1.116 paf 150: r.use_buf(*target_class,
1.67 paf 151: source.cstr(String::UL_UNSPECIFIED, r.connection(0)),
1.97 paf 152: *new(pool) String(pool, heap_place, place_size, true /*tainted*/),
1.113 paf 153: heap_place);
1.1 paf 154:
1.73 paf 155: // main_method
1.116 paf 156: main_method=target_class->get_method(r.main_method_name);
1.73 paf 157: }
158: // after restoring current-request-lang
159: // maybe-execute @main[]
160: if(main_method) {
161: // execute!
162: r.execute(*main_method->parser_code);
1.1 paf 163: }
164: }
165:
1.5 paf 166: static void _rem(Request& r, const String&, MethodParams *params) {
1.34 parser 167: params->as_junction(0, "body must be code");
1.1 paf 168: }
169:
1.5 paf 170: static void _while(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 171: Pool& pool=r.pool();
172:
1.34 parser 173: Value& vcondition=params->as_junction(0, "condition must be expression");
174: Value& body=params->as_junction(1, "body must be code");
1.1 paf 175:
176: // while...
177: int endless_loop_count=0;
178: while(true) {
1.18 parser 179: if(++endless_loop_count>=MAX_LOOPS) // endless loop?
1.78 paf 180: throw Exception("parser.runtime",
1.1 paf 181: &method_name,
182: "endless loop detected");
183:
1.86 paf 184: bool condition=r.process_to_value(vcondition,
1.83 paf 185: /*0/*no name* /,*/
1.1 paf 186: false/*don't intercept string*/).as_bool();
187: if(!condition) // ...condition is true
188: break;
189:
190: // write processed body
1.86 paf 191: r.write_pass_lang(r.process(body));
1.1 paf 192: }
193: }
194:
1.5 paf 195: static void _use(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 196: Value& vfile=params->as_no_junction(0, "file name must not be code");
1.113 paf 197: r.use_file(r.main_class, vfile.as_string());
1.1 paf 198: }
199:
1.5 paf 200: static void _for(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 201: Pool& pool=r.pool();
1.48 parser 202: const String& var_name=params->as_string(0, "var name must be string");
203: int from=params->as_int(1, "from must be int", r);
204: int to=params->as_int(2, "to must be int", r);
1.34 parser 205: Value& body_code=params->as_junction(3, "body must be code");
1.50 parser 206: Value *delim_maybe_code=params->size()>4?¶ms->get(4):0;
1.1 paf 207:
1.57 paf 208: if(to-from>=MAX_LOOPS) // too long loop?
1.78 paf 209: throw Exception("parser.runtime",
1.57 paf 210: &method_name,
211: "endless loop detected");
212:
1.1 paf 213: bool need_delim=false;
214: VInt *vint=new(pool) VInt(pool, 0);
1.117 ! paf 215: r.get_method_frame()->caller()->put_element(var_name, vint, false);
1.1 paf 216: for(int i=from; i<=to; i++) {
217: vint->set_int(i);
218:
1.108 paf 219: StringOrValue sv_processed=r.process(body_code);
220: const String *s_processed=sv_processed.get_string();
221: if(delim_maybe_code && s_processed && s_processed->size()) { // delimiter set and we have body
222: if(need_delim) // need delim & iteration produced string?
1.86 paf 223: r.write_pass_lang(r.process(*delim_maybe_code));
1.1 paf 224: need_delim=true;
225: }
1.108 paf 226: r.write_pass_lang(sv_processed);
1.1 paf 227: }
228: }
229:
1.15 paf 230: static void _eval(Request& r, const String& method_name, MethodParams *params) {
1.34 parser 231: Value& expr=params->as_junction(0, "need expression");
1.1 paf 232: // evaluate expresion
1.91 paf 233: Value *value_result=r.process_to_value(expr,
1.83 paf 234: /*0/*no name YET* /,*/
1.1 paf 235: true/*don't intercept string*/).as_expr_result();
1.50 parser 236: if(params->size()>1) {
1.34 parser 237: Value& fmt=params->as_no_junction(1, "fmt must not be code");
1.1 paf 238:
239: Pool& pool=r.pool();
240: String& string=*new(pool) String(pool);
1.91 paf 241: string.APPEND_CONST(format(pool, value_result->as_double(), fmt.as_string().cstr()));
242: r.write_no_lang(string);
243: } else
244: r.write_no_lang(*value_result);
1.1 paf 245: }
246:
1.42 parser 247: static void _connect(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 248: Pool& pool=r.pool();
1.63 paf 249: #ifdef RESOURCES_DEBUG
250: struct timeval mt[2];
251: #endif
1.34 parser 252: Value& url=params->as_no_junction(0, "url must not be code");
253: Value& body_code=params->as_junction(1, "body must be code");
1.1 paf 254:
1.113 paf 255: Table *protocol2driver_and_client=0;
256: if(Value *sql=r.main_class.get_element(*new(pool) String(pool, MAIN_SQL_NAME), &r.main_class, false)) {
257: if(Value *element=sql->get_element(*new(pool) String(pool, MAIN_SQL_DRIVERS_NAME), sql, false)) {
258: protocol2driver_and_client=element->get_table();
259: }
260: }
1.11 paf 261:
1.63 paf 262: #ifdef RESOURCES_DEBUG
263: //measure:before
264: gettimeofday(&mt[0],NULL);
265: #endif
1.1 paf 266: // connect
1.67 paf 267: SQL_Connection_ptr connection=SQL_driver_manager->get_connection(
1.42 parser 268: url.as_string(), method_name, protocol2driver_and_client);
1.1 paf 269:
1.63 paf 270: #ifdef RESOURCES_DEBUG
271: //measure:after connect
272: gettimeofday(&mt[1],NULL);
273:
274: double t[2];
275: for(int i=0;i<2;i++)
276: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
277:
278: r.sql_connect_time+=t[1]-t[0];
279: #endif
1.67 paf 280: Temp_connection temp_connection(r, connection.get());
1.1 paf 281: // execute body
1.53 parser 282: try {
1.86 paf 283: r.write_assign_lang(r.process(body_code));
1.75 paf 284: } catch(...) { // process problem
1.67 paf 285: connection->mark_to_rollback();
286: /*re*/throw;
1.1 paf 287: }
288: }
289:
1.41 parser 290: #ifndef DOXYGEN
1.28 parser 291: struct Switch_data {
1.82 paf 292: Request *r;
1.28 parser 293: Value *searching;
294: Value *found;
295: Value *_default;
296: };
1.41 parser 297: #endif
1.28 parser 298: static void _switch(Request& r, const String&, MethodParams *params) {
1.82 paf 299: Switch_data data={&r, &r.process_to_value(params->get(0))};
1.79 paf 300: Temp_hash_value switch_data_setter(r.classes_conf, *switch_data_name, &data);
1.28 parser 301:
1.83 paf 302: Value& cases_code=params->as_junction(1, "switch cases must be code");
1.82 paf 303: // execution of found ^case[...]{code} must be in context of ^switch[...]{code}
304: // because of stacked WWrapper used there as wcontext
1.84 paf 305: r.process(cases_code, true/*intercept_string*/);
1.83 paf 306: if(Value *selected_code=data.found ? data.found : data._default) {
307: // setting code context, would execute in ^switch[...]{>>context<<}
1.105 paf 308: //selected_code->get_junction()->change_context(cases_code.get_junction());
1.107 paf 309: r.write_pass_lang(r.process(*selected_code));
1.83 paf 310: }
1.28 parser 311: }
312:
1.38 parser 313: static void _case(Request& r, const String& method_name, MethodParams *params) {
314: Pool& pool=r.pool();
315:
316: Switch_data *data=static_cast<Switch_data *>(r.classes_conf.get(*switch_data_name));
317: if(!data)
1.78 paf 318: throw Exception("parser.runtime",
1.38 parser 319: &method_name,
320: "without switch");
1.28 parser 321:
322: int count=params->size();
1.34 parser 323: Value *code=¶ms->as_junction(--count, "case result must be code");
1.83 paf 324:
325: // killing context for safety, would execute in ^switch[...]{>>context<<}
326: // reason: context is stacked, and it would become invalid afterwards
1.105 paf 327: //code->get_junction()->change_context(0);
1.83 paf 328:
1.28 parser 329: for(int i=0; i<count; i++) {
1.81 paf 330: Value& value=r.process_to_value(params->get(i));
1.28 parser 331:
1.82 paf 332: if(value.as_string() == CASE_DEFAULT_VALUE) {
1.38 parser 333: data->_default=code;
1.28 parser 334: break;
335: }
336:
337: bool matches;
1.38 parser 338: if(data->searching->is_string())
339: matches=data->searching->as_string() == value.as_string();
1.28 parser 340: else
1.38 parser 341: matches=data->searching->as_double() == value.as_double();
1.28 parser 342:
343: if(matches) {
1.82 paf 344: if(data->found)
345: throw Exception("parser.runtime",
346: &method_name,
347: "duplicate found");
348:
1.38 parser 349: data->found=code;
1.28 parser 350: break;
351: }
352: }
353: }
354:
1.63 paf 355: // cache--
356:
357: // consts
358:
1.79 paf 359: const int DATA_STRING_SERIALIZED_VERSION=0x0002;
1.63 paf 360:
361: // helper types
362:
363: #ifndef DOXYGEN
364: struct Data_string_serialized_prolog {
365: int version;
1.79 paf 366: time_t expires;
1.63 paf 367: };
368: #endif
369:
1.68 paf 370: void cache_delete(const String& file_spec) {
371: file_delete(file_spec, false/*fail_on_read_problem*/);
1.63 paf 372: }
1.69 paf 373:
374: #ifndef DOXYGEN
1.79 paf 375: struct Cache_data {
376: time_t expires;
377: };
1.69 paf 378: struct Locked_process_and_cache_put_action_info {
379: Request *r;
1.79 paf 380: Cache_data *data;
1.81 paf 381: Value *body_code; const String *evaluated_body;
1.69 paf 382: };
383: #endif
384: static void locked_process_and_cache_put_action(int f, void *context) {
385: Locked_process_and_cache_put_action_info& info=
386: *static_cast<Locked_process_and_cache_put_action_info *>(context);
387:
388: // body->process
1.81 paf 389: info.evaluated_body=&info.r->process_to_string(*info.body_code);
1.69 paf 390:
1.79 paf 391: // expiration time not spoiled by ^cache(0) or something?
392: if(info.data->expires > time(0)) {
393: // string -serialize> buffer
394: void *data; size_t data_size;
1.81 paf 395: info.evaluated_body->serialize(
1.79 paf 396: sizeof(Data_string_serialized_prolog),
397: data, data_size);
398: Data_string_serialized_prolog& prolog=
399: *static_cast<Data_string_serialized_prolog *>(data);
400: prolog.version=DATA_STRING_SERIALIZED_VERSION;
401: prolog.expires=info.data->expires;
402:
403: // buffer -write> file
404: write(f, data, data_size);
405: } else // expired!
406: info.data->expires=0; // flag it so that could be easily checked by caller
1.69 paf 407: }
1.81 paf 408: const String *locked_process_and_cache_put(Request& r,
1.69 paf 409: Value& body_code,
1.79 paf 410: Cache_data& data,
1.69 paf 411: const String& file_spec) {
412: Locked_process_and_cache_put_action_info info={
413: &r,
1.81 paf 414: &data,
415: &body_code
1.69 paf 416: };
417:
1.81 paf 418: const String *result=file_write_action_under_lock(
1.69 paf 419: file_spec,
420: "cache_put", locked_process_and_cache_put_action, &info,
421: false/*as_text*/,
422: false/*do_append*/,
1.96 paf 423: false/*block*/,
424: false/*fail on lock problem*/) ? info.evaluated_body: 0;
1.100 paf 425: time_t now=time(0);
426: if(data.expires<=now)
1.79 paf 427: cache_delete(file_spec);
428: return result;
1.63 paf 429: }
1.79 paf 430: String *cache_get(Pool& pool, const String& file_spec, time_t now) {
1.63 paf 431: void* data; size_t data_size;
1.72 paf 432: if(file_read(pool, file_spec,
1.63 paf 433: data, data_size,
434: false/*as_text*/,
1.69 paf 435: false/*fail_on_read_problem*/)
1.72 paf 436: && data_size/* ignore reads which are empty due to
437: non-unary open+lockEX conflict with lockSH */) {
1.63 paf 438:
1.72 paf 439: Data_string_serialized_prolog& prolog=
440: *static_cast<Data_string_serialized_prolog *>(data);
1.63 paf 441:
1.72 paf 442: String *result=new(pool) String(pool);
443: if(
444: data_size>=sizeof(Data_string_serialized_prolog)
445: && prolog.version==DATA_STRING_SERIALIZED_VERSION
1.79 paf 446: && prolog.expires > now
1.72 paf 447: && result->deserialize(
448: sizeof(Data_string_serialized_prolog), data, data_size, file_spec.cstr()))
449: return result;
450: }
1.63 paf 451:
1.72 paf 452: return 0;
1.63 paf 453: }
1.79 paf 454: static time_t as_expires(Request& r, const String& method_name, MethodParams *params,
455: int index, time_t now) {
456: time_t result;
457: Value& vlifespan_or_expires=params->get(index);
1.104 paf 458: if(Value *vdate=vlifespan_or_expires.as(VDATE_TYPE, false))
459: result=static_cast<VDate *>(vdate)->get_time();
1.79 paf 460: else
461: result=now+(time_t)params->as_double(index, "lifespan must be date or number", r);
462:
463: return result;
464: }
465: static const String as_file_spec(Request&r, MethodParams *params, int index) {
466: return r.absolute(params->as_string(index, "filespec must be string"));
467: }
1.63 paf 468: static void _cache(Request& r, const String& method_name, MethodParams *params) {
469: Pool& pool=r.pool();
1.79 paf 470: time_t now=time(0);
471:
472: // ^cache[filename] ^cache(seconds) ^cache[expires date]
473: if(params->size()==1) {
474: if(params->get(0).is_string()) { // filename?
475: cache_delete(as_file_spec(r, params, 0));
476: return;
477: }
478:
479: // secods|expires date
480: Cache_data *data=static_cast<Cache_data *>(r.classes_conf.get(*cache_data_name));
481: if(!data)
482: throw Exception("parser.runtime",
483: &method_name,
484: "expire-time reducing instruction without cache");
485:
486: time_t expires=as_expires(r, method_name, params, 0, now);
487: if(expires < data->expires)
488: data->expires=expires;
489:
490: return;
491: }
1.63 paf 492:
493: // file_spec, expires, body code
1.65 paf 494: const String &file_spec=r.absolute(params->as_string(0, "filespec must be string"));
495:
1.79 paf 496: Cache_data data;
497: Temp_hash_value cache_data_setter(r.classes_conf, *cache_data_name, &data);
498: data.expires=as_expires(r, method_name, params, 1, now);
1.63 paf 499: Value& body_code=params->as_junction(2, "body must be code");
500:
1.79 paf 501: if(data.expires>now) { // valid 'expires' specified? try cached copy...
1.69 paf 502: // hence we don't hope to have unary create/lockEX
503: // we need some plan to live in a life like that, so...
504: // worst races plan:
505: // A B
506: // open
507: // |open
508: // lockSH
509: // |nonblocking-lockEX fails
510: // unlockSH
511: // close, cache_get returns 0
512: // open
513: // nonblocking-lockEX succeeds; process, write, close
514: // |retry1: open
515: // ...
516: // |lockSH succeeds; ...
517:
518: for(int retry=0; retry<2; retry++) {
1.79 paf 519: if(String *cached_body=cache_get(pool, file_spec, now)) { // have cached copy?
520: // write it out
521: r.write_assign_lang(*cached_body);
522: // happy with it
523: return;
524: }
1.69 paf 525:
526: // non-blocked lock; process; cache it
1.81 paf 527: if(const String*processed_body=
528: locked_process_and_cache_put(r, body_code, data, file_spec)) {
1.63 paf 529: // write it out
1.69 paf 530: r.write_assign_lang(*processed_body);
1.63 paf 531: // happy with it
532: return;
1.69 paf 533: } else { // somebody writing result right now
534: pa_sleep(0, 500000); // waiting half a second
535: retry=0; // prolonging our wait, than could cache_get it, without processing body_code
1.63 paf 536: }
1.69 paf 537: }
1.78 paf 538: throw Exception(0,
1.69 paf 539: &file_spec,
540: "locking problem");
541: } else {
1.79 paf 542: // instructed not to cache; forget cached copy
1.68 paf 543: cache_delete(file_spec);
1.69 paf 544: // process
1.81 paf 545: const String& processed_body=r.process_to_string(body_code);
1.69 paf 546: // write it out
547: r.write_assign_lang(processed_body);
548: // happy with it
549: return;
550: }
551: // never reached
1.63 paf 552: }
553:
1.74 paf 554: // also used in pa_request.C to pass param to @unhandled_exception
555: VHash& exception2vhash(Pool& pool, const Exception& e) {
556: VHash& result=*new(pool) VHash(pool);
557: Hash& hash=result.hash(0);
1.94 paf 558: if(const char *type=e.type(true))
1.78 paf 559: hash.put(*exception_type_part_name, new(pool) VString(*new(pool) String(pool, type)));
1.76 paf 560: if(const String *asource=e.problem_source()) {
561: String& source=*new(pool) String(pool);
562: source.append(*asource, String::UL_TAINTED, true/*forced*/);
1.74 paf 563:
1.76 paf 564: hash.put(*exception_source_part_name, new(pool) VString(source));
1.74 paf 565: #ifndef NO_STRING_ORIGIN
1.76 paf 566: const Origin& origin=source.origin();
1.89 paf 567: hash.put(*new(pool) String(pool, "file", 0, true),
1.74 paf 568: new(pool) VString(*new(pool) String(pool, origin.file)));
569: hash.put(*new(pool) String(pool, "lineno"),
570: new(pool) VInt(pool, 1+origin.line));
571: #endif
572: }
1.94 paf 573: if(const char *ecomment=e.comment(true)) {
1.74 paf 574: int comment_size=strlen(ecomment);
575: char *pcomment=(char *)pool.malloc(comment_size);
576: memcpy(pcomment, ecomment, comment_size);
577: hash.put(*exception_comment_part_name,
1.76 paf 578: new(pool) VString(*new(pool) String(pool, pcomment, comment_size, true/*tainted*/)));
1.74 paf 579: }
580: hash.put(*exception_handled_part_name,
581: new(pool) VBool(pool, false));
582:
583: return result;
584: }
585:
586: static void _try_operator(Request& r, const String& method_name, MethodParams *params) {
587: Pool& pool=r.pool();
588:
589: Value& body_code=params->as_junction(0, "body_code must be code");
590: Value& catch_code=params->as_junction(1, "catch_code must be code");
591:
1.86 paf 592: StringOrValue result;
1.74 paf 593: try {
1.112 paf 594: Request_context_saver context_saved(r); // taking snapshot of request processing status, restoring it at }
1.86 paf 595: result=r.process(body_code);
1.112 paf 596: context_saved.restore(); // manually restoring context
1.74 paf 597: } catch(const Exception& e) {
598: VHash& vhash=exception2vhash(pool, e);
599:
600: Junction *junction=catch_code.get_junction();
1.105 paf 601: Value *method_frame=junction->method_frame;
602: Value *saved_exception_var_value=method_frame->get_element(*exception_var_name, method_frame, false);
603: junction->method_frame->put_element(*exception_var_name, &vhash, false);
1.86 paf 604: result=r.process(catch_code);
1.74 paf 605: bool handled=false;
606: if(Value *value=static_cast<Value *>(vhash.hash(0).get(*exception_handled_part_name)))
607: handled=value->as_bool();
1.105 paf 608: junction->method_frame->put_element(*exception_var_name, saved_exception_var_value, false);
1.74 paf 609:
610: if(!handled)
611: throw(e); // rethrow
612: }
613: // write it out
1.86 paf 614: r.write_pass_lang(result);
1.74 paf 615: }
616:
617: static void _throw_operator(Request& r, const String& method_name, MethodParams *params) {
618: Pool& pool=r.pool();
619:
620: if(params->size()==1) {
621: Value& param0=params->get(0);
622: if(Hash *hash=param0.get_hash(&method_name)) {
1.78 paf 623: const char *type=0;
1.74 paf 624: if(Value *value=static_cast<Value *>(hash->get(*exception_type_part_name)))
1.78 paf 625: type=value->as_string().cstr();
1.74 paf 626: const String *source=0;
627: if(Value *value=static_cast<Value *>(hash->get(*exception_source_part_name)))
628: source=&value->as_string();
629: const char *comment=0;
630: if(Value *value=
631: static_cast<Value *>(hash->get(*exception_comment_part_name)))
632: comment=value->as_string().cstr();
633:
1.78 paf 634: throw Exception(type,
1.74 paf 635: source?source:&method_name,
636: comment);
637: } else
1.78 paf 638: throw Exception("parser.runtime",
1.74 paf 639: &method_name,
640: "one-param version has hash param");
641: } else {
1.78 paf 642: const char *type=params->as_string(0, "type must be string").cstr();
1.74 paf 643: const String& source=params->as_string(1, "source must be string");
1.92 paf 644: const char *comment=params->size()>2?params->as_string(2, "comment must be string").cstr():0;
1.97 paf 645: throw Exception(type, &source, "%s", comment?comment:"");
1.74 paf 646: }
647: }
648:
1.10 paf 649: // constructor
650:
1.113 paf 651: VClassMAIN::VClassMAIN(Pool& apool): VClass(apool) {
1.1 paf 652: // ^if(condition){code-when-true}
653: // ^if(condition){code-when-true}{code-when-false}
1.10 paf 654: add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.1 paf 655:
656: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.59 paf 657: add_native_method("untaint", Method::CT_ANY, _untaint, 1, 2);
1.1 paf 658:
659: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.10 paf 660: add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.1 paf 661:
662: // ^process[code]
1.116 paf 663: add_native_method("process", Method::CT_ANY, _process, 1, 2);
1.1 paf 664:
665: // ^rem{code}
1.51 parser 666: add_native_method("rem", Method::CT_ANY, _rem, 1, 10000);
1.1 paf 667:
668: // ^while(condition){code}
1.10 paf 669: add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.1 paf 670:
671: // ^use[file]
1.10 paf 672: add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.1 paf 673:
1.54 paf 674: // ^for[i](from-number;to-number-inclusive){code}[delim]
1.10 paf 675: add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.1 paf 676:
677: // ^eval(expr)
678: // ^eval(expr)[format]
1.10 paf 679: add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.52 parser 680:
1.1 paf 681: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.10 paf 682: add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
683:
1.63 paf 684:
1.65 paf 685: // ^cache[file_spec] delete cache
1.63 paf 686: // ^cache[file_spec](time){code} time=0 no cache
1.65 paf 687: add_native_method("cache", Method::CT_ANY, _cache, 1, 3);
1.63 paf 688:
1.28 parser 689: // switch
690:
691: // ^switch[value]{cases}
692: add_native_method("switch", Method::CT_ANY, _switch, 2, 2);
693:
694: // ^case[value]{code}
1.51 parser 695: add_native_method("case", Method::CT_ANY, _case, 2, 10000);
1.74 paf 696:
697: // try-catch
698:
699: // ^try{code}{catch code}
700: add_native_method("try", Method::CT_ANY, _try_operator, 2, 2);
701: // ^throw[$exception hash]
702: // ^throw[type;source;comment]
703: add_native_method("throw", Method::CT_ANY, _throw_operator, 1, 3);
704:
1.10 paf 705: }
1.11 paf 706:
707: // constructor & configurator
1.1 paf 708:
1.113 paf 709: VClass& VClassMAIN_create(Pool& pool) {
710: return *new(pool) VClassMAIN(pool);
1.1 paf 711: }
E-mail:
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to op.C CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [parser3project] / parser3 / src / classes