Annotation of parser3/src/classes/hash.C, revision 1.129
1.1 paf 1: /** @file
2: Parser: @b hash parser class.
3:
1.125 moko 4: Copyright (c) 2001-2015 Art. Lebedev Studio (http://www.artlebedev.com)
1.35 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.41 paf 6: */
1.1 paf 7:
8: #include "classes.h"
1.57 paf 9: #include "pa_vmethod_frame.h"
10:
1.1 paf 11: #include "pa_request.h"
1.122 moko 12: #include "pa_charsets.h"
1.1 paf 13: #include "pa_vhash.h"
1.6 parser 14: #include "pa_vvoid.h"
1.2 parser 15: #include "pa_sql_connection.h"
1.9 parser 16: #include "pa_vtable.h"
1.22 parser 17: #include "pa_vbool.h"
1.26 paf 18: #include "pa_vmethod_frame.h"
1.2 parser 19:
1.129 ! moko 20: volatile const char * IDENT_HASH_C="$Id: hash.C,v 1.128 2016/07/04 21:40:00 moko Exp $";
1.113 moko 21:
1.1 paf 22: // class
23:
1.57 paf 24: class MHash: public Methoded {
1.2 parser 25: public: // VStateless_class
1.103 misha 26: Value* create_new_value(Pool&) { return new VHash(); }
1.2 parser 27:
1.1 paf 28: public:
1.57 paf 29: MHash();
1.1 paf 30: };
31:
1.57 paf 32: // global variable
33:
1.126 moko 34: DECLARE_CLASS_VAR(hash, new MHash);
1.57 paf 35:
1.1 paf 36: // methods
37:
1.11 parser 38: #ifndef DOXYGEN
1.52 paf 39: class Hash_sql_event_handlers: public SQL_Driver_query_event_handlers {
1.57 paf 40: const String& statement_string; const char* statement_cstr;
41: bool distinct;
42: HashStringValue& rows_hash;
1.86 misha 43: Value* row_value;
1.57 paf 44: int column_index;
1.86 misha 45: ArrayString& columns;
46: bool one_bool_column;
1.67 paf 47: static VBool only_one_column_value;
1.86 misha 48: Table2hash_value_type value_type;
49: int columns_count;
50: public:
51: Table* empty;
1.11 parser 52: public:
1.57 paf 53: Hash_sql_event_handlers(
1.86 misha 54: const String& astatement_string,
55: const char* astatement_cstr,
1.49 paf 56: bool adistinct,
1.86 misha 57: HashStringValue& arows_hash,
58: Table2hash_value_type avalue_type)
59: :
60: statement_string(astatement_string),
61: statement_cstr(astatement_cstr),
1.49 paf 62: distinct(adistinct),
1.11 parser 63: rows_hash(arows_hash),
1.86 misha 64: value_type(avalue_type),
65: row_value(0),
1.67 paf 66: column_index(0),
1.86 misha 67: one_bool_column(false),
68: columns(*new ArrayString),
69: empty(0) {
1.11 parser 70: }
1.86 misha 71:
1.109 misha 72: bool add_column(SQL_Error& error, const char* str, size_t ) {
1.53 paf 73: try {
1.107 moko 74: columns+=new String(str, String::L_TAINTED /* no length as 0x00 can be inside */);
1.53 paf 75: return false;
76: } catch(...) {
77: error=SQL_Error("exception occured in Hash_sql_event_handlers::add_column");
78: return true;
79: }
1.11 parser 80: }
1.86 misha 81:
1.53 paf 82: bool before_rows(SQL_Error& error) {
1.67 paf 83: if(columns.count()<1) {
1.79 misha 84: error=SQL_Error(PARSER_RUNTIME, "no columns");
1.53 paf 85: return true;
86: }
1.86 misha 87: switch(value_type){
88: case C_STRING: {
89: if(columns.count()>2){
90: error=SQL_Error(PARSER_RUNTIME, "only 2 columns allowed for $.type[string].");
91: return true;
92: }
93: }
94: case C_TABLE: {
95: // create empty table which we'll copy later
96: empty=new Table(&columns);
97: columns_count=columns.count();
98: }
99: case C_HASH: {
100: one_bool_column=columns.count()==1;
101: }
102: }
1.53 paf 103: return false;
1.11 parser 104: }
1.86 misha 105:
1.53 paf 106: bool add_row(SQL_Error& /*error*/) {
1.11 parser 107: column_index=0;
1.53 paf 108: return false;
1.11 parser 109: }
1.86 misha 110:
1.116 misha 111: bool add_row_cell(SQL_Error& error, const char *str, size_t ) {
1.53 paf 112: try {
1.116 misha 113: const String& cell=str?*new String(str, String::L_TAINTED /* no length as 0x00 can be inside */):String::Empty;
1.86 misha 114:
1.69 paf 115: bool duplicate=false;
1.86 misha 116: if(one_bool_column) {
1.69 paf 117: duplicate=rows_hash.put_dont_replace(cell, &only_one_column_value); // put. existed?
118: } else if(column_index==0) {
1.86 misha 119: switch(value_type){
120: case C_HASH: {
121: VHash* row_vhash=new VHash;
122: row_value=row_vhash;
123: duplicate=rows_hash.put_dont_replace(cell, row_vhash); // put. existed?
124: break;
125: }
126: case C_STRING: {
127: VString* row_vstring=new VString();
128: row_value=row_vstring;
129: duplicate=rows_hash.put_dont_replace(cell, row_vstring); // put. existed?
130: break;
131: }
132: case C_TABLE: {
133: VTable* vtable=(VTable*)rows_hash.get(cell);
134: Table* table;
135:
136: if(vtable) { // table with this key exist?
137: if(!distinct) {
138: duplicate=true;
139: break;
140: }
141: table=vtable->get_table();
142: } else {
143: // no? creating table of same structure as source
144: Table::Action_options table_options(0, 0);
145: table=new Table(*empty, table_options/*no rows, just structure*/);
146: vtable=new VTable(table);
147: rows_hash.put(cell, vtable); // put
148: }
149: ArrayString* row=new ArrayString(columns_count);
150: row_value=(Value*)row;
151: *row+=&cell;
152: *table+=row;
153: break;
154: }
155: }
156: } else {
157: switch(value_type) {
158: case C_HASH: {
159: row_value->get_hash()->put(*columns[column_index], new VString(cell));
160: break;
161: }
162: case C_STRING: {
163: VString* row_string=(VString*)row_value;
164: row_string->set_string(cell);
165: break;
166: }
167: case C_TABLE: {
168: ArrayString* row=(ArrayString*)row_value;
169: *row+=&cell;
170: break;
171: }
172: }
173: }
1.69 paf 174:
175: if(duplicate & !distinct) {
1.79 misha 176: error=SQL_Error(PARSER_RUNTIME, "duplicate key");
1.69 paf 177: return true;
178: }
179:
1.53 paf 180: column_index++;
181: return false;
182: } catch(...) {
183: error=SQL_Error("exception occured in Hash_sql_event_handlers::add_row_cell");
184: return true;
185: }
1.11 parser 186: }
187:
188: };
1.67 paf 189: VBool Hash_sql_event_handlers::only_one_column_value(true);
190:
1.11 parser 191: #endif
192:
1.57 paf 193: static void _create_or_add(Request& r, MethodParams& params) {
194: if(params.count()) {
1.111 misha 195: Value& vsrc=params.as_no_junction(0, PARAM_MUST_BE_HASH);
1.115 moko 196: VHash& self=GET_SELF(r, VHash);
197: HashStringValue* src_hash;
198: HashStringValue* self_hash=&(self.hash());
199:
200: if(VHash* src=static_cast<VHash*>(vsrc.as(VHASH_TYPE))) {
1.127 moko 201: src_hash=&(src->hash());
1.115 moko 202:
203: if(src_hash==self_hash) // same: doing nothing
1.66 paf 204: return;
1.72 paf 205:
1.115 moko 206: if(Value* vdefault=src->get_default())
1.129 ! moko 207: self.set_default(vdefault);
1.115 moko 208: } else {
209: src_hash=vsrc.get_hash();
1.66 paf 210: }
1.115 moko 211:
212: if(src_hash)
213: src_hash->for_each<HashStringValue*>(copy_all_overwrite_to, self_hash);
1.20 parser 214: }
215: }
1.22 parser 216:
1.57 paf 217: static void _sub(Request& r, MethodParams& params) {
1.114 misha 218: if(HashStringValue* src=params.as_hash(0, "param")) {
1.66 paf 219: HashStringValue* self=&(GET_SELF(r, VHash).hash());
220: if(src==self) { // same: clearing
221: self->clear();
222: return;
223: }
1.77 paf 224: src->for_each<HashStringValue*>(remove_key_from, self);
1.66 paf 225: }
1.57 paf 226: }
227:
228: static void copy_all_dontoverwrite_to(
1.100 misha 229: HashStringValue::key_type key,
230: HashStringValue::value_type value,
231: HashStringValue* dest) {
1.57 paf 232: dest->put_dont_replace(key, value);
1.22 parser 233: }
1.57 paf 234: static void _union(Request& r, MethodParams& params) {
1.22 parser 235: // dest = copy of self
1.57 paf 236: Value& result=*new VHash(GET_SELF(r, VHash).hash());
1.22 parser 237: // dest += b
1.114 misha 238: if(HashStringValue* src=params.as_hash(0, "param"))
1.77 paf 239: src->for_each<HashStringValue*>(copy_all_dontoverwrite_to, result.get_hash());
1.22 parser 240:
241: // return result
242: r.write_no_lang(result);
243: }
244:
245: #ifndef DOXYGEN
246: struct Copy_intersection_to_info {
1.57 paf 247: HashStringValue* b;
248: HashStringValue* dest;
1.22 parser 249: };
250: #endif
1.57 paf 251: static void copy_intersection_to(
1.100 misha 252: HashStringValue::key_type key,
253: HashStringValue::value_type value,
254: Copy_intersection_to_info *info) {
1.57 paf 255: if(info->b->get(key))
256: info->dest->put_dont_replace(key, value);
1.22 parser 257: }
1.57 paf 258: static void _intersection(Request& r, MethodParams& params) {
259: Value& result=*new VHash;
1.22 parser 260: // dest += b
1.114 misha 261: if(HashStringValue* b=params.as_hash(0, "param")) {
1.57 paf 262: Copy_intersection_to_info info={b, result.get_hash()};
1.77 paf 263: GET_SELF(r, VHash).hash().for_each<Copy_intersection_to_info*>(copy_intersection_to, &info);
1.22 parser 264: }
265:
266: // return result
1.57 paf 267: r.write_no_lang(result);
1.22 parser 268: }
269:
1.57 paf 270: static bool intersects(
1.100 misha 271: HashStringValue::key_type key,
272: HashStringValue::value_type /*value*/,
273: HashStringValue* b) {
1.57 paf 274: return b->get(key)!=0;
1.22 parser 275: }
276:
1.57 paf 277: static void _intersects(Request& r, MethodParams& params) {
278: bool result=false;
279:
1.119 misha 280: if(HashStringValue* b=params.as_hash(0, "param")) {
281: HashStringValue* self=&(GET_SELF(r, VHash).hash());
1.120 misha 282: if(b==self) {
283: r.write_no_lang(VBool::get(true));
284: return;
285: }
1.119 misha 286: result=self->first_that<HashStringValue*>(intersects, b)!=0;
287: }
1.22 parser 288:
289: // return result
1.89 misha 290: r.write_no_lang(VBool::get(result));
1.22 parser 291: }
292:
293:
1.71 paf 294: extern String sql_bind_name;
1.57 paf 295: extern String sql_limit_name;
296: extern String sql_offset_name;
297: extern String sql_default_name;
298: extern String sql_distinct_name;
1.81 misha 299: extern String sql_value_type_name;
300: extern Table2hash_value_type get_value_type(Value& vvalue_type);
1.71 paf 301: extern int marshal_binds(HashStringValue& hash, SQL_Driver::Placeholder*& placeholders);
302: extern void unmarshal_bind_updates(HashStringValue& hash, int placeholder_count, SQL_Driver::Placeholder* placeholders);
303:
1.57 paf 304: static void _sql(Request& r, MethodParams& params) {
305: Value& statement=params.as_junction(0, "statement must be code");
1.2 parser 306:
1.71 paf 307: HashStringValue* bind=0;
1.87 misha 308: ulong limit=SQL_NO_LIMIT;
1.33 paf 309: ulong offset=0;
1.49 paf 310: bool distinct=false;
1.81 misha 311: Table2hash_value_type value_type=C_HASH;
1.110 misha 312: if(params.count()>1)
1.114 misha 313: if(HashStringValue* options=params.as_hash(1, "sql options")) {
1.110 misha 314: int valid_options=0;
315: if(Value* vbind=options->get(sql_bind_name)) {
316: valid_options++;
317: bind=vbind->get_hash();
318: }
319: if(Value* vlimit=options->get(sql_limit_name)) {
320: valid_options++;
321: limit=(ulong)r.process_to_value(*vlimit).as_double();
322: }
323: if(Value* voffset=options->get(sql_offset_name)) {
324: valid_options++;
325: offset=(ulong)r.process_to_value(*voffset).as_double();
326: }
327: if(Value* vdistinct=options->get(sql_distinct_name)) {
328: valid_options++;
329: distinct=r.process_to_value(*vdistinct).as_bool();
330: }
331: if(Value* vvalue_type=options->get(sql_value_type_name)) {
332: valid_options++;
333: value_type=get_value_type(r.process_to_value(*vvalue_type));
334: }
335: if(valid_options!=options->count())
336: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
337: }
1.2 parser 338:
1.71 paf 339: SQL_Driver::Placeholder* placeholders=0;
340: uint placeholders_count=0;
341: if(bind)
342: placeholders_count=marshal_binds(*bind, placeholders);
343:
1.57 paf 344: Temp_lang temp_lang(r, String::L_SQL);
1.37 paf 345: const String& statement_string=r.process_to_string(statement);
1.99 misha 346: const char* statement_cstr=statement_string.untaint_cstr(r.flang, r.connection());
1.97 misha 347:
1.57 paf 348: HashStringValue& hash=GET_SELF(r, VHash).hash();
1.11 parser 349: hash.clear();
1.57 paf 350: Hash_sql_event_handlers handlers(
1.49 paf 351: statement_string, statement_cstr,
352: distinct,
1.86 misha 353: hash,
354: value_type);
1.87 misha 355:
1.57 paf 356: r.connection()->query(
1.70 paf 357: statement_cstr,
1.73 paf 358: placeholders_count, placeholders,
1.70 paf 359: offset, limit,
1.45 paf 360: handlers,
361: statement_string);
1.71 paf 362:
363: if(bind)
364: unmarshal_bind_updates(*bind, placeholders_count, placeholders);
1.2 parser 365: }
366:
1.57 paf 367: static void keys_collector(
1.100 misha 368: HashStringValue::key_type key,
369: HashStringValue::value_type,
370: Table *table) {
371: Table::element_type row(new ArrayString(1));
1.57 paf 372: *row+=new String(key, String::L_TAINTED);
373: *table+=row;
1.9 parser 374: }
1.68 paf 375: static void _keys(Request& r, MethodParams& params) {
376: const String* keys_column_name;
377: if(params.count()>0)
1.81 misha 378: keys_column_name=¶ms.as_string(0, COLUMN_NAME_MUST_BE_STRING);
1.68 paf 379: else
380: keys_column_name=new String("key");
381:
1.101 misha 382: Table::columns_type columns(new ArrayString(1));
1.68 paf 383: *columns+=keys_column_name;
1.57 paf 384: Table* table=new Table(columns);
1.9 parser 385:
1.127 moko 386: GET_SELF(r, VHash).hash().for_each<Table*>(keys_collector, table);
1.9 parser 387:
1.57 paf 388: r.write_no_lang(*new VTable(table));
1.9 parser 389: }
390:
1.57 paf 391: static void _count(Request& r, MethodParams&) {
1.127 moko 392: r.write_no_lang(*new VInt(GET_SELF(r, VHash).hash().count()));
1.16 parser 393: }
394:
1.57 paf 395: static void _delete(Request& r, MethodParams& params) {
1.119 misha 396: if(params.count()>0)
397: GET_SELF(r, VHash).hash().remove(params.as_string(0, "key must be string"));
398: else
399: GET_SELF(r, VHash).hash().clear();
1.25 paf 400: }
401:
1.82 misha 402: static void _contains(Request& r, MethodParams& params) {
1.129 ! moko 403: VHash& self=GET_SELF(r, VHash);
! 404: const String& key_name=params.as_string(0, "key must be string");
! 405: bool result=SYMBOLS_EQ(key_name,_DEFAULT_SYMBOL) ? (self.get_default() != 0) : self.hash().contains(key_name);
1.89 misha 406: r.write_no_lang(VBool::get(result));
1.80 misha 407: }
408:
1.57 paf 409: static void _foreach(Request& r, MethodParams& params) {
1.102 misha 410: InCycle temp(r);
1.77 paf 411:
1.128 moko 412: const String* key_var_name=¶ms.as_string(0, "key-var name must be string");
413: const String* value_var_name=¶ms.as_string(1, "value-var name must be string");
414: Value* body_code=¶ms.as_junction(2, "body must be code");
415: Value* delim_maybe_code=params.count()>3?params.get(3):0;
416: Value& caller=*r.get_method_frame()->caller();
1.85 misha 417:
1.128 moko 418: if(key_var_name->is_empty()) key_var_name=0;
419: if(value_var_name->is_empty()) value_var_name=0;
1.57 paf 420:
421: VHash& self=GET_SELF(r, VHash);
1.127 moko 422: HashStringValue& hash=self.hash();
1.128 moko 423:
424: if(delim_maybe_code){ // delimiter set
425: bool need_delim=false;;
426: for(HashStringValue::Iterator i(hash); i; i.next()){
427: if(key_var_name){
428: VString* vkey=new VString(*new String(i.key(), String::L_TAINTED));
429: r.put_element(caller, *key_var_name, vkey);
430: }
431:
432: if(value_var_name)
433: r.put_element(caller, *value_var_name, i.value());
434:
435: StringOrValue sv_processed=r.process(*body_code);
436: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
437:
438: const String* s_processed=sv_processed.get_string();
439: if(s_processed && !s_processed->is_empty()) { // we have body
440: if(need_delim) // need delim & iteration produced string?
441: r.write_pass_lang(r.process(*delim_maybe_code));
442: else
443: need_delim=true;
444: }
445:
446: r.write_pass_lang(sv_processed);
447:
448: if(lskip==Request::SKIP_BREAK)
449: break;
450: }
451: } else {
452: for(HashStringValue::Iterator i(hash); i; i.next()){
453: if(key_var_name){
454: VString* vkey=new VString(*new String(i.key(), String::L_TAINTED));
455: r.put_element(caller, *key_var_name, vkey);
456: }
457:
458: if(value_var_name)
459: r.put_element(caller, *value_var_name, i.value());
460:
461: r.process_write(*body_code);
462: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
463:
464: if(lskip==Request::SKIP_BREAK)
465: break;
466: }
467: }
1.26 paf 468: }
469:
1.121 misha 470: enum AtResultType {
471: AtResultTypeValue = 0,
472: AtResultTypeKey = 1,
473: AtResultTypeHash = 2
474: };
475:
476: inline Value& SingleElementHash(String::Body akey, Value* avalue) {
477: Value& result=*new VHash;
478: result.put_element(*new String(akey, String::L_TAINTED), avalue);
479: return result;
480: }
481:
1.122 moko 482: #ifndef DOXYGEN
483: struct Hash_seq_item {
484: HashStringValue::Pair *hash_pair;
485: union {
486: const char *c_str;
487: double d;
488: } value;
489: };
490: #endif
491: static int sort_cmp_string(const void *a, const void *b) {
492: return strcmp(
493: static_cast<const Hash_seq_item *>(a)->value.c_str,
494: static_cast<const Hash_seq_item *>(b)->value.c_str
495: );
496: }
497: static int sort_cmp_double(const void *a, const void *b) {
498: double va=static_cast<const Hash_seq_item *>(a)->value.d;
499: double vb=static_cast<const Hash_seq_item *>(b)->value.d;
500: if(va<vb)
501: return -1;
502: else if(va>vb)
503: return +1;
504: else
505: return 0;
506: }
507: static void _sort(Request& r, MethodParams& params){
1.123 moko 508: #ifdef HASH_ORDER
1.122 moko 509: const String& key_var_name=params.as_string(0, "key-var name must be string");
510: const String& value_var_name=params.as_string(1, "value-var name must be string");
511: Value& key_maker=params.as_junction(2, "key-maker must be code");
512: bool reverse=params.count()>3/*..[desc|asc|]*/?
513: reverse=params.as_no_junction(3, "order must not be code").as_string()=="desc":
514: false; // default=asc
515:
516: const String* key_var=key_var_name.is_empty()? 0 : &key_var_name;
517: const String* value_var=value_var_name.is_empty()? 0 : &value_var_name;
518: VMethodFrame* context=r.get_method_frame()->caller();
519:
520: VHash& self=GET_SELF(r, VHash);
1.127 moko 521: HashStringValue& hash=self.hash();
1.122 moko 522: int count=hash.count();
523:
524: Hash_seq_item* seq=new(PointerFreeGC) Hash_seq_item[count];
525: int pos=0;
526: bool key_values_are_strings=true;
527:
528: for(HashStringValue::Iterator i(hash); i; i.next(), pos++ ){
529: if(key_var)
530: r.put_element(*context, *key_var, new VString(*new String(i.key(), String::L_TAINTED)));
531: if(value_var)
532: r.put_element(*context, *value_var, i.value());
533:
534: Value& value=r.process_to_value(key_maker);
535: if(pos==0) // determining key values type by first one
536: key_values_are_strings=value.is_string();
537:
538: seq[pos].hash_pair=i.pair();
539: if(key_values_are_strings)
540: seq[pos].value.c_str=value.as_string().cstr();
541: else
542: seq[pos].value.d=value.as_expr_result().as_double();
543: }
544:
545: // @todo: handle this elsewhere
546: if(r.charsets.source().NAME()=="KOI8-R" && key_values_are_strings)
547: for(pos=0; pos<count; pos++)
548: if(*seq[pos].value.c_str)
549: seq[pos].value.c_str=Charset::transcode(seq[pos].value.c_str, r.charsets.source(), UTF8_charset).cstr();
550:
551: // sort keys
552: qsort(seq, count, sizeof(Hash_seq_item), key_values_are_strings?sort_cmp_string:sort_cmp_double);
553:
554: // reorder hash as required in 'seq'
555: hash.order_clear();
556: if(reverse)
557: for(pos=count-1; pos>=0; pos--)
558: hash.order_next(seq[pos].hash_pair);
559: else
560: for(pos=0; pos<count; pos++)
561: hash.order_next(seq[pos].hash_pair);
562:
563: delete[] seq;
1.123 moko 564: #endif
1.122 moko 565: }
566:
1.105 misha 567: static void _at(Request& r, MethodParams& params) {
1.127 moko 568: HashStringValue& hash=GET_SELF(r, VHash).hash();
1.105 misha 569: size_t count=hash.count();
570:
571: int pos=0;
572:
1.121 misha 573: // misha@
574: // I do not like that type is checked before whence.
575: // But I do not like the idea to move it after whence (where process_to_value can be called) even more.
576: AtResultType result_type=AtResultTypeValue;
577: if(params.count() > 1) {
578: const String& stype=params.as_string(1, "type must be string");
579: if(stype == "key")
580: result_type=AtResultTypeKey;
581: else if(stype == "hash")
582: result_type=AtResultTypeHash;
583: else if(stype != "value")
584: throw Exception(PARSER_RUNTIME, &stype, "type must be 'key', 'value' or 'hash'");
585: }
586:
1.105 misha 587: Value& vwhence=*params.get(0);
1.121 misha 588: if(vwhence.is_string()) {
1.105 misha 589: const String& swhence=*vwhence.get_string();
590: if(swhence == "last")
591: pos=count-1;
592: else if(swhence != "first")
593: throw Exception(PARSER_RUNTIME,
594: &swhence,
595: "whence must be 'first', 'last' or expression");
596: } else {
597: pos=r.process_to_value(vwhence).as_int();
598: if(pos < 0)
599: pos+=count;
600: }
601:
1.106 misha 602: if(count && pos >= 0 && (size_t)pos < count){
1.121 misha 603: switch(result_type) {
604: case AtResultTypeKey:
605: {
1.123 moko 606: #ifdef HASH_ORDER
1.121 misha 607: if(pos == 0) {
608: r.write_assign_lang(*new VString(*new String(hash.first_key(), String::L_TAINTED)));
609: } else if((size_t)pos == count-1) {
610: r.write_assign_lang(*new VString(*new String(hash.last_key(), String::L_TAINTED)));
1.123 moko 611: } else
612: #endif
613: {
1.121 misha 614: for(HashStringValue::Iterator i(hash); i; i.next(), pos-- )
615: if(!pos){
616: r.write_assign_lang(*new VString(*new String(i.key(), String::L_TAINTED)));
617: break;
618: }
619: }
1.105 misha 620: break;
621: }
1.121 misha 622: case AtResultTypeValue:
623: {
1.123 moko 624: #ifdef HASH_ORDER
1.121 misha 625: if(pos == 0) {
626: r.write_assign_lang(*hash.first_value());
627: } else if((size_t)pos == count-1) {
628: r.write_assign_lang(*hash.last_value());
1.123 moko 629: } else
630: #endif
631: {
1.121 misha 632: for(HashStringValue::Iterator i(hash); i; i.next(), pos-- )
633: if(!pos){
634: r.write_assign_lang(*i.value());
635: break;
636: }
637: }
638: break;
639: }
640: case AtResultTypeHash:
641: {
1.123 moko 642: #ifdef HASH_ORDER
1.121 misha 643: if(pos == 0) {
644: r.write_no_lang(SingleElementHash(hash.first_key(), hash.first_value()));
645: } else if((size_t)pos == count-1) {
646: r.write_no_lang(SingleElementHash(hash.last_key(), hash.last_value()));
1.123 moko 647: } else
648: #endif
649: {
1.121 misha 650: for(HashStringValue::Iterator i(hash); i; i.next(), pos-- )
651: if(!pos){
652: r.write_no_lang(SingleElementHash(i.key(), i.value()));
653: break;
654: }
655: }
656: break;
657: }
658: }
1.105 misha 659: }
660: }
661:
1.1 paf 662: // constructor
663:
1.57 paf 664: MHash::MHash(): Methoded("hash")
1.39 paf 665: {
1.21 parser 666: // ^hash::create[[copy_from]]
1.57 paf 667: add_native_method("create", Method::CT_DYNAMIC, _create_or_add, 0, 1);
1.22 parser 668: // ^hash.add[add_from]
1.57 paf 669: add_native_method("add", Method::CT_DYNAMIC, _create_or_add, 1, 1);
1.22 parser 670: // ^hash.sub[sub_from]
671: add_native_method("sub", Method::CT_DYNAMIC, _sub, 1, 1);
672: // ^a.union[b] = hash
673: add_native_method("union", Method::CT_DYNAMIC, _union, 1, 1);
674: // ^a.intersection[b] = hash
675: add_native_method("intersection", Method::CT_DYNAMIC, _intersection, 1, 1);
676: // ^a.intersects[b] = bool
677: add_native_method("intersects", Method::CT_DYNAMIC, _intersects, 1, 1);
1.25 paf 678:
679: // ^a.delete[key]
1.119 misha 680: add_native_method("delete", Method::CT_DYNAMIC, _delete, 0, 1);
1.2 parser 681:
1.82 misha 682: // ^a.contains[key]
683: add_native_method("contains", Method::CT_DYNAMIC, _contains, 1, 1);
684: // backward
685: add_native_method("contain", Method::CT_DYNAMIC, _contains, 1, 1);
1.80 misha 686:
687: // ^hash::sql[query][options hash]
1.33 paf 688: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.2 parser 689:
1.68 paf 690: // ^hash._keys[[column name]]
1.124 moko 691: add_native_method("_keys", Method::CT_DYNAMIC, _keys, 0, 1);
1.16 parser 692:
693: // ^hash._count[]
1.124 moko 694: add_native_method("_count", Method::CT_DYNAMIC, _count, 0, 0);
1.26 paf 695:
696: // ^hash.foreach[key;value]{code}[delim]
697: add_native_method("foreach", Method::CT_DYNAMIC, _foreach, 2+1, 2+1+1);
1.105 misha 698:
1.122 moko 699: // ^hash.sort[key;value]{string-key-maker}[[asc|desc]]
700: // ^hash.sort[key;value](numeric-key-maker)[[asc|desc]]
701: add_native_method("sort", Method::CT_DYNAMIC, _sort, 2+1, 2+1+1);
702:
1.121 misha 703: // ^hash._at[first|last[;'key'|'value'|'hash']]
704: // ^hash._at([-+]offset)[['key'|'value'|'hash']]
705: add_native_method("_at", Method::CT_DYNAMIC, _at, 1, 2);
1.124 moko 706:
707: #ifdef FEATURE_GET_ELEMENT4CALL
708: // aliases without "_"
709: add_native_method("keys", Method::CT_DYNAMIC, _keys, 0, 1);
710: add_native_method("count", Method::CT_DYNAMIC, _count, 0, 0);
711: add_native_method("at", Method::CT_DYNAMIC, _at, 1, 2);
712: #endif
713:
1.1 paf 714: }
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