Annotation of parser3/src/classes/hash.C, revision 1.163
1.1 paf 1: /** @file
2: Parser: @b hash parser class.
3:
1.157 moko 4: Copyright (c) 2001-2023 Art. Lebedev Studio (http://www.artlebedev.com)
5: Authors: Konstantin Morshnev <moko@design.ru>, Alexandr Petrosian <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:
1.163 ! moko 20: volatile const char * IDENT_HASH_C="$Id: hash.C,v 1.162 2024/09/28 02:05:19 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: bool distinct;
1.159 moko 41: HashStringValue& result;
1.86 misha 42: Value* row_value;
1.57 paf 43: int column_index;
1.86 misha 44: ArrayString& columns;
45: bool one_bool_column;
46: Table2hash_value_type value_type;
47: int columns_count;
48: public:
49: Table* empty;
1.11 parser 50: public:
1.159 moko 51: Hash_sql_event_handlers(bool adistinct, HashStringValue& aresult, Table2hash_value_type avalue_type):
1.49 paf 52: distinct(adistinct),
1.159 moko 53: result(aresult),
1.86 misha 54: row_value(0),
1.67 paf 55: column_index(0),
1.139 moko 56: columns(*new ArrayString),
1.86 misha 57: one_bool_column(false),
1.139 moko 58: value_type(avalue_type),
1.86 misha 59: empty(0) {
1.11 parser 60: }
1.86 misha 61:
1.109 misha 62: bool add_column(SQL_Error& error, const char* str, size_t ) {
1.53 paf 63: try {
1.107 moko 64: columns+=new String(str, String::L_TAINTED /* no length as 0x00 can be inside */);
1.53 paf 65: return false;
66: } catch(...) {
1.142 moko 67: error=SQL_Error("exception occurred in Hash_sql_event_handlers::add_column");
1.53 paf 68: return true;
69: }
1.11 parser 70: }
1.86 misha 71:
1.53 paf 72: bool before_rows(SQL_Error& error) {
1.67 paf 73: if(columns.count()<1) {
1.145 moko 74: error=SQL_Error("no columns");
1.53 paf 75: return true;
76: }
1.162 moko 77: if(columns.count()==1) {
78: one_bool_column=true;
79: } else {
80: switch(value_type){
81: case C_STRING: {
82: if(columns.count()>2){
83: error=SQL_Error("only 2 columns allowed for $.type[string].");
84: return true;
85: }
86: break;
87: }
88: case C_TABLE: {
89: // create empty table which we'll copy later
90: empty=new Table(&columns);
91: columns_count=columns.count();
1.163 ! moko 92: break;
1.86 misha 93: }
94: }
95: }
1.53 paf 96: return false;
1.11 parser 97: }
1.86 misha 98:
1.53 paf 99: bool add_row(SQL_Error& /*error*/) {
1.11 parser 100: column_index=0;
1.53 paf 101: return false;
1.11 parser 102: }
1.86 misha 103:
1.116 misha 104: bool add_row_cell(SQL_Error& error, const char *str, size_t ) {
1.53 paf 105: try {
1.145 moko 106: const String& cell=str ? *new String(str, String::L_TAINTED /* no length as 0x00 can be inside */) : String::Empty;
1.86 misha 107:
1.69 paf 108: bool duplicate=false;
1.86 misha 109: if(one_bool_column) {
1.159 moko 110: duplicate=result.put_dont_replace(cell, &VBool::get(true)); // put. existed?
1.69 paf 111: } else if(column_index==0) {
1.86 misha 112: switch(value_type){
113: case C_HASH: {
114: VHash* row_vhash=new VHash;
115: row_value=row_vhash;
1.159 moko 116: duplicate=result.put_dont_replace(cell, row_vhash); // put. existed?
1.86 misha 117: break;
118: }
119: case C_STRING: {
120: VString* row_vstring=new VString();
121: row_value=row_vstring;
1.159 moko 122: duplicate=result.put_dont_replace(cell, row_vstring); // put. existed?
1.86 misha 123: break;
124: }
125: case C_TABLE: {
1.159 moko 126: VTable* vtable=(VTable*)result.get(cell);
1.86 misha 127:
128: if(vtable) { // table with this key exist?
129: if(!distinct) {
130: duplicate=true;
131: break;
132: }
133: } else {
134: // no? creating table of same structure as source
135: Table::Action_options table_options(0, 0);
1.160 moko 136: vtable=new VTable(new Table(*empty, table_options/*no rows, just structure*/));
1.159 moko 137: result.put(cell, vtable); // put
1.86 misha 138: }
139: ArrayString* row=new ArrayString(columns_count);
140: row_value=(Value*)row;
141: *row+=&cell;
1.160 moko 142: *vtable->get_table()+=row;
1.86 misha 143: break;
144: }
145: }
146: } else {
147: switch(value_type) {
148: case C_HASH: {
149: row_value->get_hash()->put(*columns[column_index], new VString(cell));
150: break;
151: }
152: case C_STRING: {
153: VString* row_string=(VString*)row_value;
154: row_string->set_string(cell);
155: break;
156: }
157: case C_TABLE: {
158: ArrayString* row=(ArrayString*)row_value;
159: *row+=&cell;
160: break;
161: }
162: }
163: }
1.69 paf 164:
165: if(duplicate & !distinct) {
1.145 moko 166: error=SQL_Error("duplicate key");
1.69 paf 167: return true;
168: }
169:
1.53 paf 170: column_index++;
171: return false;
172: } catch(...) {
1.142 moko 173: error=SQL_Error("exception occurred in Hash_sql_event_handlers::add_row_cell");
1.53 paf 174: return true;
175: }
1.11 parser 176: }
177:
178: };
1.67 paf 179:
1.11 parser 180: #endif
181:
1.57 paf 182: static void _create_or_add(Request& r, MethodParams& params) {
183: if(params.count()) {
1.111 misha 184: Value& vsrc=params.as_no_junction(0, PARAM_MUST_BE_HASH);
1.130 moko 185: VHashBase& self=GET_SELF(r, VHashBase);
186: HashStringValue* self_hash=&(self.hash());
1.115 moko 187: HashStringValue* src_hash;
188:
1.158 moko 189: if(VHashBase* src=dynamic_cast<VHashBase*>(&vsrc)) {
1.127 moko 190: src_hash=&(src->hash());
1.115 moko 191:
192: if(src_hash==self_hash) // same: doing nothing
1.66 paf 193: return;
1.72 paf 194:
1.115 moko 195: if(Value* vdefault=src->get_default())
1.129 moko 196: self.set_default(vdefault);
1.115 moko 197: } else {
198: src_hash=vsrc.get_hash();
1.66 paf 199: }
1.115 moko 200:
201: if(src_hash)
1.138 moko 202: for(HashStringValue::Iterator i(*src_hash); i; i.next())
203: self_hash->put(i.key(), i.value());
1.20 parser 204: }
205: }
1.22 parser 206:
1.57 paf 207: static void _sub(Request& r, MethodParams& params) {
1.114 misha 208: if(HashStringValue* src=params.as_hash(0, "param")) {
1.130 moko 209: HashStringValue* self=&(GET_SELF(r, VHashBase).hash());
1.66 paf 210: if(src==self) { // same: clearing
211: self->clear();
212: return;
213: }
1.138 moko 214: for(HashStringValue::Iterator i(*src); i; i.next())
215: self->remove(i.key());
1.66 paf 216: }
1.57 paf 217: }
218:
1.130 moko 219: static void copy_all_dontoverwrite_to(HashStringValue::key_type key, HashStringValue::value_type value, HashStringValue* dest) {
1.57 paf 220: dest->put_dont_replace(key, value);
1.22 parser 221: }
1.57 paf 222: static void _union(Request& r, MethodParams& params) {
1.22 parser 223: // dest = copy of self
1.130 moko 224: Value& result=*new VHash(GET_SELF(r, VHashBase).hash());
1.22 parser 225: // dest += b
1.114 misha 226: if(HashStringValue* src=params.as_hash(0, "param"))
1.77 paf 227: src->for_each<HashStringValue*>(copy_all_dontoverwrite_to, result.get_hash());
1.22 parser 228:
229: // return result
1.137 moko 230: r.write(result);
1.22 parser 231: }
232:
233: #ifndef DOXYGEN
234: struct Copy_intersection_to_info {
1.57 paf 235: HashStringValue* b;
236: HashStringValue* dest;
1.22 parser 237: };
238: #endif
1.155 moko 239:
240: static void copy_intersection_by_arg(HashStringValue::key_type key, HashStringValue::value_type, Copy_intersection_to_info *info) {
241: if(HashStringValue::value_type value=info->b->get(key))
242: info->dest->put_dont_replace(key, value);
243: }
244:
245: static void copy_intersection_by_self(HashStringValue::key_type key, HashStringValue::value_type value, Copy_intersection_to_info *info) {
1.57 paf 246: if(info->b->get(key))
247: info->dest->put_dont_replace(key, value);
1.22 parser 248: }
1.155 moko 249:
1.57 paf 250: static void _intersection(Request& r, MethodParams& params) {
251: Value& result=*new VHash;
1.155 moko 252:
1.156 moko 253: bool order_by_arg=false;
1.155 moko 254: if(params.count()>1)
255: if(HashStringValue* options=params.as_hash(1, "options")) {
256: int valid_options=0;
257: if(Value* vorder=options->get("order")) {
258: const String &sorder=r.process(*vorder).as_string();
1.156 moko 259: if(sorder == "arg")
260: order_by_arg=true;
261: else if(sorder != "self")
1.155 moko 262: throw Exception(PARSER_RUNTIME, &sorder, "'order' must be 'self' or 'arg'");
263: valid_options++;
264: }
265: if(valid_options!=options->count())
266: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
267: }
268:
1.114 misha 269: if(HashStringValue* b=params.as_hash(0, "param")) {
1.155 moko 270: if(order_by_arg){
271: Copy_intersection_to_info info={&GET_SELF(r, VHashBase).hash(), result.get_hash()};
272: b->for_each<Copy_intersection_to_info*>(copy_intersection_by_arg, &info);
273: } else {
274: Copy_intersection_to_info info={b, result.get_hash()};
275: GET_SELF(r, VHashBase).hash().for_each<Copy_intersection_to_info*>(copy_intersection_by_self, &info);
276: }
1.22 parser 277: }
278:
1.137 moko 279: r.write(result);
1.22 parser 280: }
281:
1.130 moko 282: static bool intersects( HashStringValue::key_type key, HashStringValue::value_type /*value*/, HashStringValue* b) {
1.57 paf 283: return b->get(key)!=0;
1.22 parser 284: }
285:
1.57 paf 286: static void _intersects(Request& r, MethodParams& params) {
287: bool result=false;
288:
1.119 misha 289: if(HashStringValue* b=params.as_hash(0, "param")) {
1.130 moko 290: HashStringValue* self=&(GET_SELF(r, VHashBase).hash());
1.120 misha 291: if(b==self) {
1.137 moko 292: r.write(VBool::get(true));
1.120 misha 293: return;
294: }
1.119 misha 295: result=self->first_that<HashStringValue*>(intersects, b)!=0;
296: }
1.22 parser 297:
298: // return result
1.137 moko 299: r.write(VBool::get(result));
1.22 parser 300: }
301:
302:
1.81 misha 303: extern Table2hash_value_type get_value_type(Value& vvalue_type);
1.71 paf 304: extern int marshal_binds(HashStringValue& hash, SQL_Driver::Placeholder*& placeholders);
305: extern void unmarshal_bind_updates(HashStringValue& hash, int placeholder_count, SQL_Driver::Placeholder* placeholders);
306:
1.57 paf 307: static void _sql(Request& r, MethodParams& params) {
308: Value& statement=params.as_junction(0, "statement must be code");
1.2 parser 309:
1.71 paf 310: HashStringValue* bind=0;
1.87 misha 311: ulong limit=SQL_NO_LIMIT;
1.33 paf 312: ulong offset=0;
1.49 paf 313: bool distinct=false;
1.81 misha 314: Table2hash_value_type value_type=C_HASH;
1.110 misha 315: if(params.count()>1)
1.114 misha 316: if(HashStringValue* options=params.as_hash(1, "sql options")) {
1.110 misha 317: int valid_options=0;
1.161 moko 318: for(HashStringValue::Iterator i(*options); i; i.next() ){
319: String::Body key=i.key();
320: Value* value=i.value();
321: if(key == sql_bind_name) {
322: bind=value->get_hash();
323: valid_options++;
324: } else if(key == sql_limit_name) {
325: limit=(ulong)r.process(*value).as_double();
326: valid_options++;
327: } else if(key == sql_offset_name) {
328: offset=(ulong)r.process(*value).as_double();
329: valid_options++;
330: } else if (key == sql_distinct_name) {
331: distinct=r.process(*value).as_bool();
332: valid_options++;
333: } else if (key == sql_value_type_name) {
334: value_type=get_value_type(r.process(*value));
335: valid_options++;
336: }
1.110 misha 337: }
338: if(valid_options!=options->count())
339: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
340: }
1.2 parser 341:
1.71 paf 342: SQL_Driver::Placeholder* placeholders=0;
343: uint placeholders_count=0;
344: if(bind)
345: placeholders_count=marshal_binds(*bind, placeholders);
346:
1.37 paf 347: const String& statement_string=r.process_to_string(statement);
1.136 moko 348: const char* statement_cstr=statement_string.untaint_cstr(String::L_SQL, r.connection());
1.97 misha 349:
1.130 moko 350: HashStringValue& hash=GET_SELF(r, VHashBase).hash();
1.145 moko 351: hash.clear();
352: Hash_sql_event_handlers handlers(distinct, hash, value_type);
353:
354: r.connection()->query(statement_cstr, placeholders_count, placeholders, offset, limit, handlers, statement_string);
1.71 paf 355:
356: if(bind)
357: unmarshal_bind_updates(*bind, placeholders_count, placeholders);
1.2 parser 358: }
359:
1.130 moko 360: static void keys_collector(HashStringValue::key_type key, HashStringValue::value_type, Table *table) {
1.100 misha 361: Table::element_type row(new ArrayString(1));
1.57 paf 362: *row+=new String(key, String::L_TAINTED);
363: *table+=row;
1.9 parser 364: }
1.68 paf 365: static void _keys(Request& r, MethodParams& params) {
366: const String* keys_column_name;
367: if(params.count()>0)
1.81 misha 368: keys_column_name=¶ms.as_string(0, COLUMN_NAME_MUST_BE_STRING);
1.68 paf 369: else
370: keys_column_name=new String("key");
371:
1.101 misha 372: Table::columns_type columns(new ArrayString(1));
1.68 paf 373: *columns+=keys_column_name;
1.57 paf 374: Table* table=new Table(columns);
1.9 parser 375:
1.130 moko 376: GET_SELF(r, VHashBase).hash().for_each<Table*>(keys_collector, table);
1.9 parser 377:
1.137 moko 378: r.write(*new VTable(table));
1.9 parser 379: }
380:
1.57 paf 381: static void _count(Request& r, MethodParams&) {
1.137 moko 382: r.write(*new VInt(GET_SELF(r, VHashBase).hash().count()));
1.16 parser 383: }
384:
1.57 paf 385: static void _delete(Request& r, MethodParams& params) {
1.119 misha 386: if(params.count()>0)
1.130 moko 387: GET_SELF(r, VHashBase).hash().remove(params.as_string(0, "key must be string"));
1.119 misha 388: else
1.130 moko 389: GET_SELF(r, VHashBase).hash().clear();
1.25 paf 390: }
391:
1.82 misha 392: static void _contains(Request& r, MethodParams& params) {
1.130 moko 393: VHashBase& self=GET_SELF(r, VHashBase);
1.129 moko 394: const String& key_name=params.as_string(0, "key must be string");
395: bool result=SYMBOLS_EQ(key_name,_DEFAULT_SYMBOL) ? (self.get_default() != 0) : self.hash().contains(key_name);
1.137 moko 396: r.write(VBool::get(result));
1.80 misha 397: }
398:
1.57 paf 399: static void _foreach(Request& r, MethodParams& params) {
1.102 misha 400: InCycle temp(r);
1.77 paf 401:
1.128 moko 402: const String* key_var_name=¶ms.as_string(0, "key-var name must be string");
403: const String* value_var_name=¶ms.as_string(1, "value-var name must be string");
404: Value* body_code=¶ms.as_junction(2, "body must be code");
1.134 moko 405: Value* delim_maybe_code=params.count()>3?¶ms[3]:0;
1.128 moko 406: Value& caller=*r.get_method_frame()->caller();
1.85 misha 407:
1.128 moko 408: if(key_var_name->is_empty()) key_var_name=0;
409: if(value_var_name->is_empty()) value_var_name=0;
1.57 paf 410:
1.130 moko 411: HashStringValue& hash=GET_SELF(r, VHashBase).hash();
1.128 moko 412:
413: if(delim_maybe_code){ // delimiter set
414: bool need_delim=false;;
415: for(HashStringValue::Iterator i(hash); i; i.next()){
416: if(key_var_name){
417: VString* vkey=new VString(*new String(i.key(), String::L_TAINTED));
418: r.put_element(caller, *key_var_name, vkey);
419: }
420:
421: if(value_var_name)
422: r.put_element(caller, *value_var_name, i.value());
423:
1.132 moko 424: Value& sv_processed=r.process(*body_code);
1.140 moko 425: TempSkip4Delimiter skip(r);
1.128 moko 426:
427: const String* s_processed=sv_processed.get_string();
428: if(s_processed && !s_processed->is_empty()) { // we have body
429: if(need_delim) // need delim & iteration produced string?
1.137 moko 430: r.write(r.process(*delim_maybe_code));
1.128 moko 431: else
432: need_delim=true;
433: }
434:
1.137 moko 435: r.write(sv_processed);
1.128 moko 436:
1.140 moko 437: if(skip.check_break())
1.128 moko 438: break;
439: }
440: } else {
441: for(HashStringValue::Iterator i(hash); i; i.next()){
442: if(key_var_name){
443: VString* vkey=new VString(*new String(i.key(), String::L_TAINTED));
444: r.put_element(caller, *key_var_name, vkey);
445: }
446:
447: if(value_var_name)
448: r.put_element(caller, *value_var_name, i.value());
449:
450: r.process_write(*body_code);
451:
1.140 moko 452: if(r.check_skip_break())
1.128 moko 453: break;
454: }
455: }
1.26 paf 456: }
457:
1.121 misha 458: enum AtResultType {
459: AtResultTypeValue = 0,
460: AtResultTypeKey = 1,
461: AtResultTypeHash = 2
462: };
463:
464: inline Value& SingleElementHash(String::Body akey, Value* avalue) {
465: Value& result=*new VHash;
466: result.put_element(*new String(akey, String::L_TAINTED), avalue);
467: return result;
468: }
469:
1.122 moko 470: #ifndef DOXYGEN
1.143 moko 471: struct Hash_seq_item : public PA_Allocated {
1.122 moko 472: HashStringValue::Pair *hash_pair;
473: union {
474: const char *c_str;
475: double d;
476: } value;
477: };
478: #endif
479: static int sort_cmp_string(const void *a, const void *b) {
480: return strcmp(
481: static_cast<const Hash_seq_item *>(a)->value.c_str,
482: static_cast<const Hash_seq_item *>(b)->value.c_str
483: );
484: }
485: static int sort_cmp_double(const void *a, const void *b) {
486: double va=static_cast<const Hash_seq_item *>(a)->value.d;
487: double vb=static_cast<const Hash_seq_item *>(b)->value.d;
488: if(va<vb)
489: return -1;
490: else if(va>vb)
491: return +1;
492: else
493: return 0;
494: }
495: static void _sort(Request& r, MethodParams& params){
1.123 moko 496: #ifdef HASH_ORDER
1.122 moko 497: const String& key_var_name=params.as_string(0, "key-var name must be string");
498: const String& value_var_name=params.as_string(1, "value-var name must be string");
499: Value& key_maker=params.as_junction(2, "key-maker must be code");
1.139 moko 500: bool reverse=params.count()>3 /*..[desc|asc|]*/ && params.as_no_junction(3, "order must not be code").as_string()=="desc"; // default=asc
1.122 moko 501:
502: const String* key_var=key_var_name.is_empty()? 0 : &key_var_name;
503: const String* value_var=value_var_name.is_empty()? 0 : &value_var_name;
504: VMethodFrame* context=r.get_method_frame()->caller();
505:
1.130 moko 506: HashStringValue& hash=GET_SELF(r, VHashBase).hash();
1.122 moko 507: int count=hash.count();
508:
1.143 moko 509: Hash_seq_item* seq=new Hash_seq_item[count];
1.122 moko 510: int pos=0;
511: bool key_values_are_strings=true;
512:
513: for(HashStringValue::Iterator i(hash); i; i.next(), pos++ ){
514: if(key_var)
515: r.put_element(*context, *key_var, new VString(*new String(i.key(), String::L_TAINTED)));
516: if(value_var)
517: r.put_element(*context, *value_var, i.value());
518:
1.133 moko 519: Value& value=r.process(key_maker);
1.122 moko 520: if(pos==0) // determining key values type by first one
521: key_values_are_strings=value.is_string();
522:
523: seq[pos].hash_pair=i.pair();
524: if(key_values_are_strings)
525: seq[pos].value.c_str=value.as_string().cstr();
526: else
527: seq[pos].value.d=value.as_expr_result().as_double();
528: }
529:
530: // @todo: handle this elsewhere
531: if(r.charsets.source().NAME()=="KOI8-R" && key_values_are_strings)
532: for(pos=0; pos<count; pos++)
533: if(*seq[pos].value.c_str)
1.131 moko 534: seq[pos].value.c_str=Charset::transcode(seq[pos].value.c_str, r.charsets.source(), pa_UTF8_charset).cstr();
1.122 moko 535:
536: // sort keys
537: qsort(seq, count, sizeof(Hash_seq_item), key_values_are_strings?sort_cmp_string:sort_cmp_double);
538:
539: // reorder hash as required in 'seq'
540: hash.order_clear();
541: if(reverse)
542: for(pos=count-1; pos>=0; pos--)
543: hash.order_next(seq[pos].hash_pair);
544: else
545: for(pos=0; pos<count; pos++)
546: hash.order_next(seq[pos].hash_pair);
547:
548: delete[] seq;
1.123 moko 549: #endif
1.122 moko 550: }
551:
1.105 misha 552: static void _at(Request& r, MethodParams& params) {
1.130 moko 553: HashStringValue& hash=GET_SELF(r, VHashBase).hash();
1.105 misha 554: size_t count=hash.count();
555:
556: int pos=0;
557:
1.121 misha 558: // misha@
559: // I do not like that type is checked before whence.
1.133 moko 560: // But I do not like the idea to move it after whence (where process can be called) even more.
1.121 misha 561: AtResultType result_type=AtResultTypeValue;
562: if(params.count() > 1) {
563: const String& stype=params.as_string(1, "type must be string");
564: if(stype == "key")
565: result_type=AtResultTypeKey;
566: else if(stype == "hash")
567: result_type=AtResultTypeHash;
568: else if(stype != "value")
569: throw Exception(PARSER_RUNTIME, &stype, "type must be 'key', 'value' or 'hash'");
570: }
571:
1.134 moko 572: Value& vwhence=params[0];
1.121 misha 573: if(vwhence.is_string()) {
1.105 misha 574: const String& swhence=*vwhence.get_string();
575: if(swhence == "last")
576: pos=count-1;
577: else if(swhence != "first")
578: throw Exception(PARSER_RUNTIME,
579: &swhence,
580: "whence must be 'first', 'last' or expression");
581: } else {
1.133 moko 582: pos=r.process(vwhence).as_int();
1.105 misha 583: if(pos < 0)
584: pos+=count;
585: }
586:
1.106 misha 587: if(count && pos >= 0 && (size_t)pos < count){
1.121 misha 588: switch(result_type) {
589: case AtResultTypeKey:
590: {
1.123 moko 591: #ifdef HASH_ORDER
1.121 misha 592: if(pos == 0) {
1.137 moko 593: r.write(*new VString(*new String(hash.first_key(), String::L_TAINTED)));
1.121 misha 594: } else if((size_t)pos == count-1) {
1.137 moko 595: r.write(*new VString(*new String(hash.last_key(), String::L_TAINTED)));
1.123 moko 596: } else
597: #endif
598: {
1.121 misha 599: for(HashStringValue::Iterator i(hash); i; i.next(), pos-- )
600: if(!pos){
1.137 moko 601: r.write(*new VString(*new String(i.key(), String::L_TAINTED)));
1.121 misha 602: break;
603: }
604: }
1.105 misha 605: break;
606: }
1.121 misha 607: case AtResultTypeValue:
608: {
1.123 moko 609: #ifdef HASH_ORDER
1.121 misha 610: if(pos == 0) {
1.137 moko 611: r.write(*hash.first_value());
1.121 misha 612: } else if((size_t)pos == count-1) {
1.137 moko 613: r.write(*hash.last_value());
1.123 moko 614: } else
615: #endif
616: {
1.121 misha 617: for(HashStringValue::Iterator i(hash); i; i.next(), pos-- )
618: if(!pos){
1.137 moko 619: r.write(*i.value());
1.121 misha 620: break;
621: }
622: }
623: break;
624: }
625: case AtResultTypeHash:
626: {
1.123 moko 627: #ifdef HASH_ORDER
1.121 misha 628: if(pos == 0) {
1.137 moko 629: r.write(SingleElementHash(hash.first_key(), hash.first_value()));
1.121 misha 630: } else if((size_t)pos == count-1) {
1.137 moko 631: r.write(SingleElementHash(hash.last_key(), hash.last_value()));
1.123 moko 632: } else
633: #endif
634: {
1.121 misha 635: for(HashStringValue::Iterator i(hash); i; i.next(), pos-- )
636: if(!pos){
1.137 moko 637: r.write(SingleElementHash(i.key(), i.value()));
1.121 misha 638: break;
639: }
640: }
641: break;
642: }
643: }
1.105 misha 644: }
645: }
646:
1.147 moko 647: extern String table_reverse_name;
648:
649: static void _select(Request& r, MethodParams& params) {
1.154 moko 650: InCycle temp(r);
1.147 moko 651: const String* key_var_name=¶ms.as_string(0, "key-var name must be string");
652: const String* value_var_name=¶ms.as_string(1, "value-var name must be string");
653: Value& vcondition=params.as_expression(2, "condition must be number, bool or expression");
654:
655: if(key_var_name->is_empty()) key_var_name=0;
656: if(value_var_name->is_empty()) value_var_name=0;
657:
658: HashStringValue& source_hash=GET_SELF(r, VHashBase).hash();
659: Value& caller=*r.get_method_frame()->caller();
660:
661: int limit=source_hash.count();
662: bool reverse=false;
1.149 moko 663: bool copy_default=false;
1.147 moko 664:
665: if(params.count()>3)
666: if(HashStringValue* options=params.as_hash(3)) {
667: int valid_options=0;
668: if(Value* vlimit=options->get(sql_limit_name)) {
669: valid_options++;
670: limit=r.process(*vlimit).as_int();
671: }
672: if(Value* vreverse=options->get(table_reverse_name)) {
673: valid_options++;
674: reverse=r.process(*vreverse).as_bool();
675: }
1.149 moko 676: if(Value* vcopy_default=options->get(sql_default_name)) {
677: valid_options++;
678: copy_default=r.process(*vcopy_default).as_bool();
679: }
1.147 moko 680: if(valid_options!=options->count())
681: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
682: }
683:
684: HashStringValue& result_hash=*new HashStringValue();
685:
686: if(limit>0){
1.154 moko 687:
1.147 moko 688: #ifdef HASH_ORDER
689: if(reverse){
690: for(HashStringValue::ReverseIterator i(source_hash); i; i.prev()){
691: if(key_var_name)
692: r.put_element(caller, *key_var_name, new VString(*new String(i.key(), String::L_TAINTED)));
693: if(value_var_name)
694: r.put_element(caller, *value_var_name, i.value());
695:
1.154 moko 696: bool condition=r.process(vcondition).as_bool();
697:
698: if(r.check_skip_break())
699: break;
700:
701: if(condition){
1.147 moko 702: result_hash.put(i.key(), i.value());
703: if(!--limit)
704: break;
705: }
706: }
707: } else {
708: #else
709: {
710: #endif
711: for(HashStringValue::Iterator i(source_hash); i; i.next() ){
712: if(key_var_name)
713: r.put_element(caller, *key_var_name, new VString(*new String(i.key(), String::L_TAINTED)));
714: if(value_var_name)
715: r.put_element(caller, *value_var_name, i.value());
716:
1.154 moko 717: bool condition=r.process(vcondition).as_bool();
718:
719: if(r.check_skip_break())
720: break;
721:
722: if(condition){
1.147 moko 723: result_hash.put(i.key(), i.value());
724: if(!--limit)
725: break;
726: }
727: }
728: }
729: }
730:
1.149 moko 731: VHash *result=new VHash(result_hash);
732: if(copy_default){
733: result->set_default(GET_SELF(r, VHashBase).get_default());
734: }
735:
736: r.write(*result);
1.147 moko 737: }
738:
739: static void _reverse(Request& r, MethodParams& params) {
1.148 moko 740: VHashBase& self=GET_SELF(r, VHashBase);
741: HashStringValue& source_hash=self.hash();
1.147 moko 742: HashStringValue& result_hash=*new HashStringValue();
743:
744: #ifdef HASH_ORDER
745: for(HashStringValue::ReverseIterator i(source_hash); i; i.prev())
746: result_hash.put(i.key(), i.value());
747: #else
748: for(HashStringValue::Iterator i(source_hash); i; i.next() )
749: result_hash.put(i.key(), i.value());
750: #endif
1.148 moko 751:
752: VHashBase& result=*new VHash(result_hash);
753: if(Value* vdefault=self.get_default())
754: result.set_default(vdefault);
755:
756: r.write(result);
1.147 moko 757: }
758:
1.150 moko 759:
760: static void _rename(Request& r, MethodParams& params) {
1.151 moko 761: HashStringValue& hash=GET_SELF(r, VHashBase).hash();
762:
763: if(params.count()>1){
764: const String& key_from=params.as_string(0, "from key must be string");
765: const String& key_to=params.as_string(1, "to key must be string");
766:
767: hash.rename(key_from, key_to);
1.152 moko 768: } else {
1.153 moko 769: HashStringValue* names=params.as_hash(0,"single parameter");
1.150 moko 770:
1.151 moko 771: for(HashStringValue::Iterator i(*names); i; i.next())
772: hash.rename(i.key(), i.value()->as_string());
773: }
1.150 moko 774: }
775:
776:
1.1 paf 777: // constructor
778:
1.57 paf 779: MHash::MHash(): Methoded("hash")
1.39 paf 780: {
1.21 parser 781: // ^hash::create[[copy_from]]
1.57 paf 782: add_native_method("create", Method::CT_DYNAMIC, _create_or_add, 0, 1);
1.22 parser 783: // ^hash.add[add_from]
1.57 paf 784: add_native_method("add", Method::CT_DYNAMIC, _create_or_add, 1, 1);
1.22 parser 785: // ^hash.sub[sub_from]
786: add_native_method("sub", Method::CT_DYNAMIC, _sub, 1, 1);
787: // ^a.union[b] = hash
788: add_native_method("union", Method::CT_DYNAMIC, _union, 1, 1);
1.155 moko 789: // ^a.intersection[b][options hash] = hash
790: add_native_method("intersection", Method::CT_DYNAMIC, _intersection, 1, 2);
1.22 parser 791: // ^a.intersects[b] = bool
792: add_native_method("intersects", Method::CT_DYNAMIC, _intersects, 1, 1);
1.25 paf 793:
794: // ^a.delete[key]
1.119 misha 795: add_native_method("delete", Method::CT_DYNAMIC, _delete, 0, 1);
1.2 parser 796:
1.82 misha 797: // ^a.contains[key]
798: add_native_method("contains", Method::CT_DYNAMIC, _contains, 1, 1);
799: // backward
800: add_native_method("contain", Method::CT_DYNAMIC, _contains, 1, 1);
1.80 misha 801:
802: // ^hash::sql[query][options hash]
1.33 paf 803: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.2 parser 804:
1.68 paf 805: // ^hash._keys[[column name]]
1.124 moko 806: add_native_method("_keys", Method::CT_DYNAMIC, _keys, 0, 1);
1.16 parser 807:
808: // ^hash._count[]
1.124 moko 809: add_native_method("_count", Method::CT_DYNAMIC, _count, 0, 0);
1.26 paf 810:
811: // ^hash.foreach[key;value]{code}[delim]
812: add_native_method("foreach", Method::CT_DYNAMIC, _foreach, 2+1, 2+1+1);
1.105 misha 813:
1.122 moko 814: // ^hash.sort[key;value]{string-key-maker}[[asc|desc]]
815: // ^hash.sort[key;value](numeric-key-maker)[[asc|desc]]
1.147 moko 816: add_native_method("sort", Method::CT_DYNAMIC, _sort, 3, 4);
817:
818: // ^hash.select[key;value](bool-condition)[options hash]
819: add_native_method("select", Method::CT_DYNAMIC, _select, 3, 4);
820:
821: // ^hash.reverse[]
822: add_native_method("reverse", Method::CT_DYNAMIC, _reverse, 0, 0);
1.122 moko 823:
1.121 misha 824: // ^hash._at[first|last[;'key'|'value'|'hash']]
825: // ^hash._at([-+]offset)[['key'|'value'|'hash']]
826: add_native_method("_at", Method::CT_DYNAMIC, _at, 1, 2);
1.124 moko 827:
1.150 moko 828: // ^hash.rename[from;to]
1.151 moko 829: // ^hash.rename[ $.from[to] ... ]
830: add_native_method("rename", Method::CT_DYNAMIC, _rename, 1, 2);
1.150 moko 831:
1.124 moko 832: #ifdef FEATURE_GET_ELEMENT4CALL
833: // aliases without "_"
834: add_native_method("keys", Method::CT_DYNAMIC, _keys, 0, 1);
835: add_native_method("count", Method::CT_DYNAMIC, _count, 0, 0);
836: add_native_method("at", Method::CT_DYNAMIC, _at, 1, 2);
837: #endif
838:
1.1 paf 839: }
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