Annotation of parser3/src/classes/hash.C, revision 1.133
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:
1.133 ! moko 20: volatile const char * IDENT_HASH_C="$Id: hash.C,v 1.132 2016/09/29 18:49:42 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);
1.130 moko 196: VHashBase& self=GET_SELF(r, VHashBase);
197: HashStringValue* self_hash=&(self.hash());
1.115 moko 198: HashStringValue* src_hash;
199:
1.130 moko 200: if(VHashBase* src=static_cast<VHashBase*>(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")) {
1.130 moko 219: HashStringValue* self=&(GET_SELF(r, VHashBase).hash());
1.66 paf 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:
1.130 moko 228: static void copy_all_dontoverwrite_to(HashStringValue::key_type key, HashStringValue::value_type value, HashStringValue* dest) {
1.57 paf 229: dest->put_dont_replace(key, value);
1.22 parser 230: }
1.57 paf 231: static void _union(Request& r, MethodParams& params) {
1.22 parser 232: // dest = copy of self
1.130 moko 233: Value& result=*new VHash(GET_SELF(r, VHashBase).hash());
1.22 parser 234: // dest += b
1.114 misha 235: if(HashStringValue* src=params.as_hash(0, "param"))
1.77 paf 236: src->for_each<HashStringValue*>(copy_all_dontoverwrite_to, result.get_hash());
1.22 parser 237:
238: // return result
239: r.write_no_lang(result);
240: }
241:
242: #ifndef DOXYGEN
243: struct Copy_intersection_to_info {
1.57 paf 244: HashStringValue* b;
245: HashStringValue* dest;
1.22 parser 246: };
247: #endif
1.130 moko 248: static void copy_intersection_to(HashStringValue::key_type key, HashStringValue::value_type value, Copy_intersection_to_info *info) {
1.57 paf 249: if(info->b->get(key))
250: info->dest->put_dont_replace(key, value);
1.22 parser 251: }
1.57 paf 252: static void _intersection(Request& r, MethodParams& params) {
253: Value& result=*new VHash;
1.22 parser 254: // dest += b
1.114 misha 255: if(HashStringValue* b=params.as_hash(0, "param")) {
1.57 paf 256: Copy_intersection_to_info info={b, result.get_hash()};
1.130 moko 257: GET_SELF(r, VHashBase).hash().for_each<Copy_intersection_to_info*>(copy_intersection_to, &info);
1.22 parser 258: }
259:
260: // return result
1.57 paf 261: r.write_no_lang(result);
1.22 parser 262: }
263:
1.130 moko 264: static bool intersects( HashStringValue::key_type key, HashStringValue::value_type /*value*/, HashStringValue* b) {
1.57 paf 265: return b->get(key)!=0;
1.22 parser 266: }
267:
1.57 paf 268: static void _intersects(Request& r, MethodParams& params) {
269: bool result=false;
270:
1.119 misha 271: if(HashStringValue* b=params.as_hash(0, "param")) {
1.130 moko 272: HashStringValue* self=&(GET_SELF(r, VHashBase).hash());
1.120 misha 273: if(b==self) {
274: r.write_no_lang(VBool::get(true));
275: return;
276: }
1.119 misha 277: result=self->first_that<HashStringValue*>(intersects, b)!=0;
278: }
1.22 parser 279:
280: // return result
1.89 misha 281: r.write_no_lang(VBool::get(result));
1.22 parser 282: }
283:
284:
1.71 paf 285: extern String sql_bind_name;
1.57 paf 286: extern String sql_limit_name;
287: extern String sql_offset_name;
288: extern String sql_default_name;
289: extern String sql_distinct_name;
1.81 misha 290: extern String sql_value_type_name;
291: extern Table2hash_value_type get_value_type(Value& vvalue_type);
1.71 paf 292: extern int marshal_binds(HashStringValue& hash, SQL_Driver::Placeholder*& placeholders);
293: extern void unmarshal_bind_updates(HashStringValue& hash, int placeholder_count, SQL_Driver::Placeholder* placeholders);
294:
1.57 paf 295: static void _sql(Request& r, MethodParams& params) {
296: Value& statement=params.as_junction(0, "statement must be code");
1.2 parser 297:
1.71 paf 298: HashStringValue* bind=0;
1.87 misha 299: ulong limit=SQL_NO_LIMIT;
1.33 paf 300: ulong offset=0;
1.49 paf 301: bool distinct=false;
1.81 misha 302: Table2hash_value_type value_type=C_HASH;
1.110 misha 303: if(params.count()>1)
1.114 misha 304: if(HashStringValue* options=params.as_hash(1, "sql options")) {
1.110 misha 305: int valid_options=0;
306: if(Value* vbind=options->get(sql_bind_name)) {
307: valid_options++;
308: bind=vbind->get_hash();
309: }
310: if(Value* vlimit=options->get(sql_limit_name)) {
311: valid_options++;
1.133 ! moko 312: limit=(ulong)r.process(*vlimit).as_double();
1.110 misha 313: }
314: if(Value* voffset=options->get(sql_offset_name)) {
315: valid_options++;
1.133 ! moko 316: offset=(ulong)r.process(*voffset).as_double();
1.110 misha 317: }
318: if(Value* vdistinct=options->get(sql_distinct_name)) {
319: valid_options++;
1.133 ! moko 320: distinct=r.process(*vdistinct).as_bool();
1.110 misha 321: }
322: if(Value* vvalue_type=options->get(sql_value_type_name)) {
323: valid_options++;
1.133 ! moko 324: value_type=get_value_type(r.process(*vvalue_type));
1.110 misha 325: }
326: if(valid_options!=options->count())
327: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
328: }
1.2 parser 329:
1.71 paf 330: SQL_Driver::Placeholder* placeholders=0;
331: uint placeholders_count=0;
332: if(bind)
333: placeholders_count=marshal_binds(*bind, placeholders);
334:
1.57 paf 335: Temp_lang temp_lang(r, String::L_SQL);
1.37 paf 336: const String& statement_string=r.process_to_string(statement);
1.99 misha 337: const char* statement_cstr=statement_string.untaint_cstr(r.flang, r.connection());
1.97 misha 338:
1.130 moko 339: HashStringValue& hash=GET_SELF(r, VHashBase).hash();
1.11 parser 340: hash.clear();
1.57 paf 341: Hash_sql_event_handlers handlers(
1.49 paf 342: statement_string, statement_cstr,
343: distinct,
1.86 misha 344: hash,
345: value_type);
1.87 misha 346:
1.57 paf 347: r.connection()->query(
1.70 paf 348: statement_cstr,
1.73 paf 349: placeholders_count, placeholders,
1.70 paf 350: offset, limit,
1.45 paf 351: handlers,
352: statement_string);
1.71 paf 353:
354: if(bind)
355: unmarshal_bind_updates(*bind, placeholders_count, placeholders);
1.2 parser 356: }
357:
1.130 moko 358: static void keys_collector(HashStringValue::key_type key, HashStringValue::value_type, Table *table) {
1.100 misha 359: Table::element_type row(new ArrayString(1));
1.57 paf 360: *row+=new String(key, String::L_TAINTED);
361: *table+=row;
1.9 parser 362: }
1.68 paf 363: static void _keys(Request& r, MethodParams& params) {
364: const String* keys_column_name;
365: if(params.count()>0)
1.81 misha 366: keys_column_name=¶ms.as_string(0, COLUMN_NAME_MUST_BE_STRING);
1.68 paf 367: else
368: keys_column_name=new String("key");
369:
1.101 misha 370: Table::columns_type columns(new ArrayString(1));
1.68 paf 371: *columns+=keys_column_name;
1.57 paf 372: Table* table=new Table(columns);
1.9 parser 373:
1.130 moko 374: GET_SELF(r, VHashBase).hash().for_each<Table*>(keys_collector, table);
1.9 parser 375:
1.57 paf 376: r.write_no_lang(*new VTable(table));
1.9 parser 377: }
378:
1.57 paf 379: static void _count(Request& r, MethodParams&) {
1.130 moko 380: r.write_no_lang(*new VInt(GET_SELF(r, VHashBase).hash().count()));
1.16 parser 381: }
382:
1.57 paf 383: static void _delete(Request& r, MethodParams& params) {
1.119 misha 384: if(params.count()>0)
1.130 moko 385: GET_SELF(r, VHashBase).hash().remove(params.as_string(0, "key must be string"));
1.119 misha 386: else
1.130 moko 387: GET_SELF(r, VHashBase).hash().clear();
1.25 paf 388: }
389:
1.82 misha 390: static void _contains(Request& r, MethodParams& params) {
1.130 moko 391: VHashBase& self=GET_SELF(r, VHashBase);
1.129 moko 392: const String& key_name=params.as_string(0, "key must be string");
393: bool result=SYMBOLS_EQ(key_name,_DEFAULT_SYMBOL) ? (self.get_default() != 0) : self.hash().contains(key_name);
1.89 misha 394: r.write_no_lang(VBool::get(result));
1.80 misha 395: }
396:
1.57 paf 397: static void _foreach(Request& r, MethodParams& params) {
1.102 misha 398: InCycle temp(r);
1.77 paf 399:
1.128 moko 400: const String* key_var_name=¶ms.as_string(0, "key-var name must be string");
401: const String* value_var_name=¶ms.as_string(1, "value-var name must be string");
402: Value* body_code=¶ms.as_junction(2, "body must be code");
403: Value* delim_maybe_code=params.count()>3?params.get(3):0;
404: Value& caller=*r.get_method_frame()->caller();
1.85 misha 405:
1.128 moko 406: if(key_var_name->is_empty()) key_var_name=0;
407: if(value_var_name->is_empty()) value_var_name=0;
1.57 paf 408:
1.130 moko 409: HashStringValue& hash=GET_SELF(r, VHashBase).hash();
1.128 moko 410:
411: if(delim_maybe_code){ // delimiter set
412: bool need_delim=false;;
413: for(HashStringValue::Iterator i(hash); i; i.next()){
414: if(key_var_name){
415: VString* vkey=new VString(*new String(i.key(), String::L_TAINTED));
416: r.put_element(caller, *key_var_name, vkey);
417: }
418:
419: if(value_var_name)
420: r.put_element(caller, *value_var_name, i.value());
421:
1.132 moko 422: Value& sv_processed=r.process(*body_code);
1.128 moko 423: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
424:
425: const String* s_processed=sv_processed.get_string();
426: if(s_processed && !s_processed->is_empty()) { // we have body
427: if(need_delim) // need delim & iteration produced string?
428: r.write_pass_lang(r.process(*delim_maybe_code));
429: else
430: need_delim=true;
431: }
432:
433: r.write_pass_lang(sv_processed);
434:
435: if(lskip==Request::SKIP_BREAK)
436: break;
437: }
438: } else {
439: for(HashStringValue::Iterator i(hash); i; i.next()){
440: if(key_var_name){
441: VString* vkey=new VString(*new String(i.key(), String::L_TAINTED));
442: r.put_element(caller, *key_var_name, vkey);
443: }
444:
445: if(value_var_name)
446: r.put_element(caller, *value_var_name, i.value());
447:
448: r.process_write(*body_code);
449: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
450:
451: if(lskip==Request::SKIP_BREAK)
452: break;
453: }
454: }
1.26 paf 455: }
456:
1.121 misha 457: enum AtResultType {
458: AtResultTypeValue = 0,
459: AtResultTypeKey = 1,
460: AtResultTypeHash = 2
461: };
462:
463: inline Value& SingleElementHash(String::Body akey, Value* avalue) {
464: Value& result=*new VHash;
465: result.put_element(*new String(akey, String::L_TAINTED), avalue);
466: return result;
467: }
468:
1.122 moko 469: #ifndef DOXYGEN
470: struct Hash_seq_item {
471: HashStringValue::Pair *hash_pair;
472: union {
473: const char *c_str;
474: double d;
475: } value;
476: };
477: #endif
478: static int sort_cmp_string(const void *a, const void *b) {
479: return strcmp(
480: static_cast<const Hash_seq_item *>(a)->value.c_str,
481: static_cast<const Hash_seq_item *>(b)->value.c_str
482: );
483: }
484: static int sort_cmp_double(const void *a, const void *b) {
485: double va=static_cast<const Hash_seq_item *>(a)->value.d;
486: double vb=static_cast<const Hash_seq_item *>(b)->value.d;
487: if(va<vb)
488: return -1;
489: else if(va>vb)
490: return +1;
491: else
492: return 0;
493: }
494: static void _sort(Request& r, MethodParams& params){
1.123 moko 495: #ifdef HASH_ORDER
1.122 moko 496: const String& key_var_name=params.as_string(0, "key-var name must be string");
497: const String& value_var_name=params.as_string(1, "value-var name must be string");
498: Value& key_maker=params.as_junction(2, "key-maker must be code");
499: bool reverse=params.count()>3/*..[desc|asc|]*/?
500: reverse=params.as_no_junction(3, "order must not be code").as_string()=="desc":
501: false; // default=asc
502:
503: const String* key_var=key_var_name.is_empty()? 0 : &key_var_name;
504: const String* value_var=value_var_name.is_empty()? 0 : &value_var_name;
505: VMethodFrame* context=r.get_method_frame()->caller();
506:
1.130 moko 507: HashStringValue& hash=GET_SELF(r, VHashBase).hash();
1.122 moko 508: int count=hash.count();
509:
510: Hash_seq_item* seq=new(PointerFreeGC) Hash_seq_item[count];
511: int pos=0;
512: bool key_values_are_strings=true;
513:
514: for(HashStringValue::Iterator i(hash); i; i.next(), pos++ ){
515: if(key_var)
516: r.put_element(*context, *key_var, new VString(*new String(i.key(), String::L_TAINTED)));
517: if(value_var)
518: r.put_element(*context, *value_var, i.value());
519:
1.133 ! moko 520: Value& value=r.process(key_maker);
1.122 moko 521: if(pos==0) // determining key values type by first one
522: key_values_are_strings=value.is_string();
523:
524: seq[pos].hash_pair=i.pair();
525: if(key_values_are_strings)
526: seq[pos].value.c_str=value.as_string().cstr();
527: else
528: seq[pos].value.d=value.as_expr_result().as_double();
529: }
530:
531: // @todo: handle this elsewhere
532: if(r.charsets.source().NAME()=="KOI8-R" && key_values_are_strings)
533: for(pos=0; pos<count; pos++)
534: if(*seq[pos].value.c_str)
1.131 moko 535: seq[pos].value.c_str=Charset::transcode(seq[pos].value.c_str, r.charsets.source(), pa_UTF8_charset).cstr();
1.122 moko 536:
537: // sort keys
538: qsort(seq, count, sizeof(Hash_seq_item), key_values_are_strings?sort_cmp_string:sort_cmp_double);
539:
540: // reorder hash as required in 'seq'
541: hash.order_clear();
542: if(reverse)
543: for(pos=count-1; pos>=0; pos--)
544: hash.order_next(seq[pos].hash_pair);
545: else
546: for(pos=0; pos<count; pos++)
547: hash.order_next(seq[pos].hash_pair);
548:
549: delete[] seq;
1.123 moko 550: #endif
1.122 moko 551: }
552:
1.105 misha 553: static void _at(Request& r, MethodParams& params) {
1.130 moko 554: HashStringValue& hash=GET_SELF(r, VHashBase).hash();
1.105 misha 555: size_t count=hash.count();
556:
557: int pos=0;
558:
1.121 misha 559: // misha@
560: // I do not like that type is checked before whence.
1.133 ! moko 561: // But I do not like the idea to move it after whence (where process can be called) even more.
1.121 misha 562: AtResultType result_type=AtResultTypeValue;
563: if(params.count() > 1) {
564: const String& stype=params.as_string(1, "type must be string");
565: if(stype == "key")
566: result_type=AtResultTypeKey;
567: else if(stype == "hash")
568: result_type=AtResultTypeHash;
569: else if(stype != "value")
570: throw Exception(PARSER_RUNTIME, &stype, "type must be 'key', 'value' or 'hash'");
571: }
572:
1.105 misha 573: Value& vwhence=*params.get(0);
1.121 misha 574: if(vwhence.is_string()) {
1.105 misha 575: const String& swhence=*vwhence.get_string();
576: if(swhence == "last")
577: pos=count-1;
578: else if(swhence != "first")
579: throw Exception(PARSER_RUNTIME,
580: &swhence,
581: "whence must be 'first', 'last' or expression");
582: } else {
1.133 ! moko 583: pos=r.process(vwhence).as_int();
1.105 misha 584: if(pos < 0)
585: pos+=count;
586: }
587:
1.106 misha 588: if(count && pos >= 0 && (size_t)pos < count){
1.121 misha 589: switch(result_type) {
590: case AtResultTypeKey:
591: {
1.123 moko 592: #ifdef HASH_ORDER
1.121 misha 593: if(pos == 0) {
594: r.write_assign_lang(*new VString(*new String(hash.first_key(), String::L_TAINTED)));
595: } else if((size_t)pos == count-1) {
596: r.write_assign_lang(*new VString(*new String(hash.last_key(), String::L_TAINTED)));
1.123 moko 597: } else
598: #endif
599: {
1.121 misha 600: for(HashStringValue::Iterator i(hash); i; i.next(), pos-- )
601: if(!pos){
602: r.write_assign_lang(*new VString(*new String(i.key(), String::L_TAINTED)));
603: break;
604: }
605: }
1.105 misha 606: break;
607: }
1.121 misha 608: case AtResultTypeValue:
609: {
1.123 moko 610: #ifdef HASH_ORDER
1.121 misha 611: if(pos == 0) {
612: r.write_assign_lang(*hash.first_value());
613: } else if((size_t)pos == count-1) {
614: r.write_assign_lang(*hash.last_value());
1.123 moko 615: } else
616: #endif
617: {
1.121 misha 618: for(HashStringValue::Iterator i(hash); i; i.next(), pos-- )
619: if(!pos){
620: r.write_assign_lang(*i.value());
621: break;
622: }
623: }
624: break;
625: }
626: case AtResultTypeHash:
627: {
1.123 moko 628: #ifdef HASH_ORDER
1.121 misha 629: if(pos == 0) {
630: r.write_no_lang(SingleElementHash(hash.first_key(), hash.first_value()));
631: } else if((size_t)pos == count-1) {
632: r.write_no_lang(SingleElementHash(hash.last_key(), hash.last_value()));
1.123 moko 633: } else
634: #endif
635: {
1.121 misha 636: for(HashStringValue::Iterator i(hash); i; i.next(), pos-- )
637: if(!pos){
638: r.write_no_lang(SingleElementHash(i.key(), i.value()));
639: break;
640: }
641: }
642: break;
643: }
644: }
1.105 misha 645: }
646: }
647:
1.1 paf 648: // constructor
649:
1.57 paf 650: MHash::MHash(): Methoded("hash")
1.39 paf 651: {
1.21 parser 652: // ^hash::create[[copy_from]]
1.57 paf 653: add_native_method("create", Method::CT_DYNAMIC, _create_or_add, 0, 1);
1.22 parser 654: // ^hash.add[add_from]
1.57 paf 655: add_native_method("add", Method::CT_DYNAMIC, _create_or_add, 1, 1);
1.22 parser 656: // ^hash.sub[sub_from]
657: add_native_method("sub", Method::CT_DYNAMIC, _sub, 1, 1);
658: // ^a.union[b] = hash
659: add_native_method("union", Method::CT_DYNAMIC, _union, 1, 1);
660: // ^a.intersection[b] = hash
661: add_native_method("intersection", Method::CT_DYNAMIC, _intersection, 1, 1);
662: // ^a.intersects[b] = bool
663: add_native_method("intersects", Method::CT_DYNAMIC, _intersects, 1, 1);
1.25 paf 664:
665: // ^a.delete[key]
1.119 misha 666: add_native_method("delete", Method::CT_DYNAMIC, _delete, 0, 1);
1.2 parser 667:
1.82 misha 668: // ^a.contains[key]
669: add_native_method("contains", Method::CT_DYNAMIC, _contains, 1, 1);
670: // backward
671: add_native_method("contain", Method::CT_DYNAMIC, _contains, 1, 1);
1.80 misha 672:
673: // ^hash::sql[query][options hash]
1.33 paf 674: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.2 parser 675:
1.68 paf 676: // ^hash._keys[[column name]]
1.124 moko 677: add_native_method("_keys", Method::CT_DYNAMIC, _keys, 0, 1);
1.16 parser 678:
679: // ^hash._count[]
1.124 moko 680: add_native_method("_count", Method::CT_DYNAMIC, _count, 0, 0);
1.26 paf 681:
682: // ^hash.foreach[key;value]{code}[delim]
683: add_native_method("foreach", Method::CT_DYNAMIC, _foreach, 2+1, 2+1+1);
1.105 misha 684:
1.122 moko 685: // ^hash.sort[key;value]{string-key-maker}[[asc|desc]]
686: // ^hash.sort[key;value](numeric-key-maker)[[asc|desc]]
687: add_native_method("sort", Method::CT_DYNAMIC, _sort, 2+1, 2+1+1);
688:
1.121 misha 689: // ^hash._at[first|last[;'key'|'value'|'hash']]
690: // ^hash._at([-+]offset)[['key'|'value'|'hash']]
691: add_native_method("_at", Method::CT_DYNAMIC, _at, 1, 2);
1.124 moko 692:
693: #ifdef FEATURE_GET_ELEMENT4CALL
694: // aliases without "_"
695: add_native_method("keys", Method::CT_DYNAMIC, _keys, 0, 1);
696: add_native_method("count", Method::CT_DYNAMIC, _count, 0, 0);
697: add_native_method("at", Method::CT_DYNAMIC, _at, 1, 2);
698: #endif
699:
1.1 paf 700: }
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