Annotation of parser3/src/classes/hash.C, revision 1.161
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:
1.161 ! moko 20: volatile const char * IDENT_HASH_C="$Id: hash.C,v 1.160 2024/09/27 20:49:10 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: }
1.86 misha 77: switch(value_type){
78: case C_STRING: {
79: if(columns.count()>2){
1.145 moko 80: error=SQL_Error("only 2 columns allowed for $.type[string].");
1.86 misha 81: return true;
82: }
83: }
84: case C_TABLE: {
85: // create empty table which we'll copy later
86: empty=new Table(&columns);
87: columns_count=columns.count();
88: }
89: case C_HASH: {
90: one_bool_column=columns.count()==1;
91: }
92: }
1.53 paf 93: return false;
1.11 parser 94: }
1.86 misha 95:
1.53 paf 96: bool add_row(SQL_Error& /*error*/) {
1.11 parser 97: column_index=0;
1.53 paf 98: return false;
1.11 parser 99: }
1.86 misha 100:
1.116 misha 101: bool add_row_cell(SQL_Error& error, const char *str, size_t ) {
1.53 paf 102: try {
1.145 moko 103: const String& cell=str ? *new String(str, String::L_TAINTED /* no length as 0x00 can be inside */) : String::Empty;
1.86 misha 104:
1.69 paf 105: bool duplicate=false;
1.86 misha 106: if(one_bool_column) {
1.159 moko 107: duplicate=result.put_dont_replace(cell, &VBool::get(true)); // put. existed?
1.69 paf 108: } else if(column_index==0) {
1.86 misha 109: switch(value_type){
110: case C_HASH: {
111: VHash* row_vhash=new VHash;
112: row_value=row_vhash;
1.159 moko 113: duplicate=result.put_dont_replace(cell, row_vhash); // put. existed?
1.86 misha 114: break;
115: }
116: case C_STRING: {
117: VString* row_vstring=new VString();
118: row_value=row_vstring;
1.159 moko 119: duplicate=result.put_dont_replace(cell, row_vstring); // put. existed?
1.86 misha 120: break;
121: }
122: case C_TABLE: {
1.159 moko 123: VTable* vtable=(VTable*)result.get(cell);
1.86 misha 124:
125: if(vtable) { // table with this key exist?
126: if(!distinct) {
127: duplicate=true;
128: break;
129: }
130: } else {
131: // no? creating table of same structure as source
132: Table::Action_options table_options(0, 0);
1.160 moko 133: vtable=new VTable(new Table(*empty, table_options/*no rows, just structure*/));
1.159 moko 134: result.put(cell, vtable); // put
1.86 misha 135: }
136: ArrayString* row=new ArrayString(columns_count);
137: row_value=(Value*)row;
138: *row+=&cell;
1.160 moko 139: *vtable->get_table()+=row;
1.86 misha 140: break;
141: }
142: }
143: } else {
144: switch(value_type) {
145: case C_HASH: {
146: row_value->get_hash()->put(*columns[column_index], new VString(cell));
147: break;
148: }
149: case C_STRING: {
150: VString* row_string=(VString*)row_value;
151: row_string->set_string(cell);
152: break;
153: }
154: case C_TABLE: {
155: ArrayString* row=(ArrayString*)row_value;
156: *row+=&cell;
157: break;
158: }
159: }
160: }
1.69 paf 161:
162: if(duplicate & !distinct) {
1.145 moko 163: error=SQL_Error("duplicate key");
1.69 paf 164: return true;
165: }
166:
1.53 paf 167: column_index++;
168: return false;
169: } catch(...) {
1.142 moko 170: error=SQL_Error("exception occurred in Hash_sql_event_handlers::add_row_cell");
1.53 paf 171: return true;
172: }
1.11 parser 173: }
174:
175: };
1.67 paf 176:
1.11 parser 177: #endif
178:
1.57 paf 179: static void _create_or_add(Request& r, MethodParams& params) {
180: if(params.count()) {
1.111 misha 181: Value& vsrc=params.as_no_junction(0, PARAM_MUST_BE_HASH);
1.130 moko 182: VHashBase& self=GET_SELF(r, VHashBase);
183: HashStringValue* self_hash=&(self.hash());
1.115 moko 184: HashStringValue* src_hash;
185:
1.158 moko 186: if(VHashBase* src=dynamic_cast<VHashBase*>(&vsrc)) {
1.127 moko 187: src_hash=&(src->hash());
1.115 moko 188:
189: if(src_hash==self_hash) // same: doing nothing
1.66 paf 190: return;
1.72 paf 191:
1.115 moko 192: if(Value* vdefault=src->get_default())
1.129 moko 193: self.set_default(vdefault);
1.115 moko 194: } else {
195: src_hash=vsrc.get_hash();
1.66 paf 196: }
1.115 moko 197:
198: if(src_hash)
1.138 moko 199: for(HashStringValue::Iterator i(*src_hash); i; i.next())
200: self_hash->put(i.key(), i.value());
1.20 parser 201: }
202: }
1.22 parser 203:
1.57 paf 204: static void _sub(Request& r, MethodParams& params) {
1.114 misha 205: if(HashStringValue* src=params.as_hash(0, "param")) {
1.130 moko 206: HashStringValue* self=&(GET_SELF(r, VHashBase).hash());
1.66 paf 207: if(src==self) { // same: clearing
208: self->clear();
209: return;
210: }
1.138 moko 211: for(HashStringValue::Iterator i(*src); i; i.next())
212: self->remove(i.key());
1.66 paf 213: }
1.57 paf 214: }
215:
1.130 moko 216: static void copy_all_dontoverwrite_to(HashStringValue::key_type key, HashStringValue::value_type value, HashStringValue* dest) {
1.57 paf 217: dest->put_dont_replace(key, value);
1.22 parser 218: }
1.57 paf 219: static void _union(Request& r, MethodParams& params) {
1.22 parser 220: // dest = copy of self
1.130 moko 221: Value& result=*new VHash(GET_SELF(r, VHashBase).hash());
1.22 parser 222: // dest += b
1.114 misha 223: if(HashStringValue* src=params.as_hash(0, "param"))
1.77 paf 224: src->for_each<HashStringValue*>(copy_all_dontoverwrite_to, result.get_hash());
1.22 parser 225:
226: // return result
1.137 moko 227: r.write(result);
1.22 parser 228: }
229:
230: #ifndef DOXYGEN
231: struct Copy_intersection_to_info {
1.57 paf 232: HashStringValue* b;
233: HashStringValue* dest;
1.22 parser 234: };
235: #endif
1.155 moko 236:
237: static void copy_intersection_by_arg(HashStringValue::key_type key, HashStringValue::value_type, Copy_intersection_to_info *info) {
238: if(HashStringValue::value_type value=info->b->get(key))
239: info->dest->put_dont_replace(key, value);
240: }
241:
242: static void copy_intersection_by_self(HashStringValue::key_type key, HashStringValue::value_type value, Copy_intersection_to_info *info) {
1.57 paf 243: if(info->b->get(key))
244: info->dest->put_dont_replace(key, value);
1.22 parser 245: }
1.155 moko 246:
1.57 paf 247: static void _intersection(Request& r, MethodParams& params) {
248: Value& result=*new VHash;
1.155 moko 249:
1.156 moko 250: bool order_by_arg=false;
1.155 moko 251: if(params.count()>1)
252: if(HashStringValue* options=params.as_hash(1, "options")) {
253: int valid_options=0;
254: if(Value* vorder=options->get("order")) {
255: const String &sorder=r.process(*vorder).as_string();
1.156 moko 256: if(sorder == "arg")
257: order_by_arg=true;
258: else if(sorder != "self")
1.155 moko 259: throw Exception(PARSER_RUNTIME, &sorder, "'order' must be 'self' or 'arg'");
260: valid_options++;
261: }
262: if(valid_options!=options->count())
263: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
264: }
265:
1.114 misha 266: if(HashStringValue* b=params.as_hash(0, "param")) {
1.155 moko 267: if(order_by_arg){
268: Copy_intersection_to_info info={&GET_SELF(r, VHashBase).hash(), result.get_hash()};
269: b->for_each<Copy_intersection_to_info*>(copy_intersection_by_arg, &info);
270: } else {
271: Copy_intersection_to_info info={b, result.get_hash()};
272: GET_SELF(r, VHashBase).hash().for_each<Copy_intersection_to_info*>(copy_intersection_by_self, &info);
273: }
1.22 parser 274: }
275:
1.137 moko 276: r.write(result);
1.22 parser 277: }
278:
1.130 moko 279: static bool intersects( HashStringValue::key_type key, HashStringValue::value_type /*value*/, HashStringValue* b) {
1.57 paf 280: return b->get(key)!=0;
1.22 parser 281: }
282:
1.57 paf 283: static void _intersects(Request& r, MethodParams& params) {
284: bool result=false;
285:
1.119 misha 286: if(HashStringValue* b=params.as_hash(0, "param")) {
1.130 moko 287: HashStringValue* self=&(GET_SELF(r, VHashBase).hash());
1.120 misha 288: if(b==self) {
1.137 moko 289: r.write(VBool::get(true));
1.120 misha 290: return;
291: }
1.119 misha 292: result=self->first_that<HashStringValue*>(intersects, b)!=0;
293: }
1.22 parser 294:
295: // return result
1.137 moko 296: r.write(VBool::get(result));
1.22 parser 297: }
298:
299:
1.81 misha 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;
1.161 ! moko 315: for(HashStringValue::Iterator i(*options); i; i.next() ){
! 316: String::Body key=i.key();
! 317: Value* value=i.value();
! 318: if(key == sql_bind_name) {
! 319: bind=value->get_hash();
! 320: valid_options++;
! 321: } else if(key == sql_limit_name) {
! 322: limit=(ulong)r.process(*value).as_double();
! 323: valid_options++;
! 324: } else if(key == sql_offset_name) {
! 325: offset=(ulong)r.process(*value).as_double();
! 326: valid_options++;
! 327: } else if (key == sql_distinct_name) {
! 328: distinct=r.process(*value).as_bool();
! 329: valid_options++;
! 330: } else if (key == sql_value_type_name) {
! 331: value_type=get_value_type(r.process(*value));
! 332: valid_options++;
! 333: }
1.110 misha 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:
1.37 paf 344: const String& statement_string=r.process_to_string(statement);
1.136 moko 345: const char* statement_cstr=statement_string.untaint_cstr(String::L_SQL, r.connection());
1.97 misha 346:
1.130 moko 347: HashStringValue& hash=GET_SELF(r, VHashBase).hash();
1.145 moko 348: hash.clear();
349: Hash_sql_event_handlers handlers(distinct, hash, value_type);
350:
351: r.connection()->query(statement_cstr, placeholders_count, placeholders, offset, limit, handlers, statement_string);
1.71 paf 352:
353: if(bind)
354: unmarshal_bind_updates(*bind, placeholders_count, placeholders);
1.2 parser 355: }
356:
1.130 moko 357: static void keys_collector(HashStringValue::key_type key, HashStringValue::value_type, Table *table) {
1.100 misha 358: Table::element_type row(new ArrayString(1));
1.57 paf 359: *row+=new String(key, String::L_TAINTED);
360: *table+=row;
1.9 parser 361: }
1.68 paf 362: static void _keys(Request& r, MethodParams& params) {
363: const String* keys_column_name;
364: if(params.count()>0)
1.81 misha 365: keys_column_name=¶ms.as_string(0, COLUMN_NAME_MUST_BE_STRING);
1.68 paf 366: else
367: keys_column_name=new String("key");
368:
1.101 misha 369: Table::columns_type columns(new ArrayString(1));
1.68 paf 370: *columns+=keys_column_name;
1.57 paf 371: Table* table=new Table(columns);
1.9 parser 372:
1.130 moko 373: GET_SELF(r, VHashBase).hash().for_each<Table*>(keys_collector, table);
1.9 parser 374:
1.137 moko 375: r.write(*new VTable(table));
1.9 parser 376: }
377:
1.57 paf 378: static void _count(Request& r, MethodParams&) {
1.137 moko 379: r.write(*new VInt(GET_SELF(r, VHashBase).hash().count()));
1.16 parser 380: }
381:
1.57 paf 382: static void _delete(Request& r, MethodParams& params) {
1.119 misha 383: if(params.count()>0)
1.130 moko 384: GET_SELF(r, VHashBase).hash().remove(params.as_string(0, "key must be string"));
1.119 misha 385: else
1.130 moko 386: GET_SELF(r, VHashBase).hash().clear();
1.25 paf 387: }
388:
1.82 misha 389: static void _contains(Request& r, MethodParams& params) {
1.130 moko 390: VHashBase& self=GET_SELF(r, VHashBase);
1.129 moko 391: const String& key_name=params.as_string(0, "key must be string");
392: bool result=SYMBOLS_EQ(key_name,_DEFAULT_SYMBOL) ? (self.get_default() != 0) : self.hash().contains(key_name);
1.137 moko 393: r.write(VBool::get(result));
1.80 misha 394: }
395:
1.57 paf 396: static void _foreach(Request& r, MethodParams& params) {
1.102 misha 397: InCycle temp(r);
1.77 paf 398:
1.128 moko 399: const String* key_var_name=¶ms.as_string(0, "key-var name must be string");
400: const String* value_var_name=¶ms.as_string(1, "value-var name must be string");
401: Value* body_code=¶ms.as_junction(2, "body must be code");
1.134 moko 402: Value* delim_maybe_code=params.count()>3?¶ms[3]:0;
1.128 moko 403: Value& caller=*r.get_method_frame()->caller();
1.85 misha 404:
1.128 moko 405: if(key_var_name->is_empty()) key_var_name=0;
406: if(value_var_name->is_empty()) value_var_name=0;
1.57 paf 407:
1.130 moko 408: HashStringValue& hash=GET_SELF(r, VHashBase).hash();
1.128 moko 409:
410: if(delim_maybe_code){ // delimiter set
411: bool need_delim=false;;
412: for(HashStringValue::Iterator i(hash); i; i.next()){
413: if(key_var_name){
414: VString* vkey=new VString(*new String(i.key(), String::L_TAINTED));
415: r.put_element(caller, *key_var_name, vkey);
416: }
417:
418: if(value_var_name)
419: r.put_element(caller, *value_var_name, i.value());
420:
1.132 moko 421: Value& sv_processed=r.process(*body_code);
1.140 moko 422: TempSkip4Delimiter skip(r);
1.128 moko 423:
424: const String* s_processed=sv_processed.get_string();
425: if(s_processed && !s_processed->is_empty()) { // we have body
426: if(need_delim) // need delim & iteration produced string?
1.137 moko 427: r.write(r.process(*delim_maybe_code));
1.128 moko 428: else
429: need_delim=true;
430: }
431:
1.137 moko 432: r.write(sv_processed);
1.128 moko 433:
1.140 moko 434: if(skip.check_break())
1.128 moko 435: break;
436: }
437: } else {
438: for(HashStringValue::Iterator i(hash); i; i.next()){
439: if(key_var_name){
440: VString* vkey=new VString(*new String(i.key(), String::L_TAINTED));
441: r.put_element(caller, *key_var_name, vkey);
442: }
443:
444: if(value_var_name)
445: r.put_element(caller, *value_var_name, i.value());
446:
447: r.process_write(*body_code);
448:
1.140 moko 449: if(r.check_skip_break())
1.128 moko 450: break;
451: }
452: }
1.26 paf 453: }
454:
1.121 misha 455: enum AtResultType {
456: AtResultTypeValue = 0,
457: AtResultTypeKey = 1,
458: AtResultTypeHash = 2
459: };
460:
461: inline Value& SingleElementHash(String::Body akey, Value* avalue) {
462: Value& result=*new VHash;
463: result.put_element(*new String(akey, String::L_TAINTED), avalue);
464: return result;
465: }
466:
1.122 moko 467: #ifndef DOXYGEN
1.143 moko 468: struct Hash_seq_item : public PA_Allocated {
1.122 moko 469: HashStringValue::Pair *hash_pair;
470: union {
471: const char *c_str;
472: double d;
473: } value;
474: };
475: #endif
476: static int sort_cmp_string(const void *a, const void *b) {
477: return strcmp(
478: static_cast<const Hash_seq_item *>(a)->value.c_str,
479: static_cast<const Hash_seq_item *>(b)->value.c_str
480: );
481: }
482: static int sort_cmp_double(const void *a, const void *b) {
483: double va=static_cast<const Hash_seq_item *>(a)->value.d;
484: double vb=static_cast<const Hash_seq_item *>(b)->value.d;
485: if(va<vb)
486: return -1;
487: else if(va>vb)
488: return +1;
489: else
490: return 0;
491: }
492: static void _sort(Request& r, MethodParams& params){
1.123 moko 493: #ifdef HASH_ORDER
1.122 moko 494: const String& key_var_name=params.as_string(0, "key-var name must be string");
495: const String& value_var_name=params.as_string(1, "value-var name must be string");
496: Value& key_maker=params.as_junction(2, "key-maker must be code");
1.139 moko 497: 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 498:
499: const String* key_var=key_var_name.is_empty()? 0 : &key_var_name;
500: const String* value_var=value_var_name.is_empty()? 0 : &value_var_name;
501: VMethodFrame* context=r.get_method_frame()->caller();
502:
1.130 moko 503: HashStringValue& hash=GET_SELF(r, VHashBase).hash();
1.122 moko 504: int count=hash.count();
505:
1.143 moko 506: Hash_seq_item* seq=new Hash_seq_item[count];
1.122 moko 507: int pos=0;
508: bool key_values_are_strings=true;
509:
510: for(HashStringValue::Iterator i(hash); i; i.next(), pos++ ){
511: if(key_var)
512: r.put_element(*context, *key_var, new VString(*new String(i.key(), String::L_TAINTED)));
513: if(value_var)
514: r.put_element(*context, *value_var, i.value());
515:
1.133 moko 516: Value& value=r.process(key_maker);
1.122 moko 517: if(pos==0) // determining key values type by first one
518: key_values_are_strings=value.is_string();
519:
520: seq[pos].hash_pair=i.pair();
521: if(key_values_are_strings)
522: seq[pos].value.c_str=value.as_string().cstr();
523: else
524: seq[pos].value.d=value.as_expr_result().as_double();
525: }
526:
527: // @todo: handle this elsewhere
528: if(r.charsets.source().NAME()=="KOI8-R" && key_values_are_strings)
529: for(pos=0; pos<count; pos++)
530: if(*seq[pos].value.c_str)
1.131 moko 531: seq[pos].value.c_str=Charset::transcode(seq[pos].value.c_str, r.charsets.source(), pa_UTF8_charset).cstr();
1.122 moko 532:
533: // sort keys
534: qsort(seq, count, sizeof(Hash_seq_item), key_values_are_strings?sort_cmp_string:sort_cmp_double);
535:
536: // reorder hash as required in 'seq'
537: hash.order_clear();
538: if(reverse)
539: for(pos=count-1; pos>=0; pos--)
540: hash.order_next(seq[pos].hash_pair);
541: else
542: for(pos=0; pos<count; pos++)
543: hash.order_next(seq[pos].hash_pair);
544:
545: delete[] seq;
1.123 moko 546: #endif
1.122 moko 547: }
548:
1.105 misha 549: static void _at(Request& r, MethodParams& params) {
1.130 moko 550: HashStringValue& hash=GET_SELF(r, VHashBase).hash();
1.105 misha 551: size_t count=hash.count();
552:
553: int pos=0;
554:
1.121 misha 555: // misha@
556: // I do not like that type is checked before whence.
1.133 moko 557: // But I do not like the idea to move it after whence (where process can be called) even more.
1.121 misha 558: AtResultType result_type=AtResultTypeValue;
559: if(params.count() > 1) {
560: const String& stype=params.as_string(1, "type must be string");
561: if(stype == "key")
562: result_type=AtResultTypeKey;
563: else if(stype == "hash")
564: result_type=AtResultTypeHash;
565: else if(stype != "value")
566: throw Exception(PARSER_RUNTIME, &stype, "type must be 'key', 'value' or 'hash'");
567: }
568:
1.134 moko 569: Value& vwhence=params[0];
1.121 misha 570: if(vwhence.is_string()) {
1.105 misha 571: const String& swhence=*vwhence.get_string();
572: if(swhence == "last")
573: pos=count-1;
574: else if(swhence != "first")
575: throw Exception(PARSER_RUNTIME,
576: &swhence,
577: "whence must be 'first', 'last' or expression");
578: } else {
1.133 moko 579: pos=r.process(vwhence).as_int();
1.105 misha 580: if(pos < 0)
581: pos+=count;
582: }
583:
1.106 misha 584: if(count && pos >= 0 && (size_t)pos < count){
1.121 misha 585: switch(result_type) {
586: case AtResultTypeKey:
587: {
1.123 moko 588: #ifdef HASH_ORDER
1.121 misha 589: if(pos == 0) {
1.137 moko 590: r.write(*new VString(*new String(hash.first_key(), String::L_TAINTED)));
1.121 misha 591: } else if((size_t)pos == count-1) {
1.137 moko 592: r.write(*new VString(*new String(hash.last_key(), String::L_TAINTED)));
1.123 moko 593: } else
594: #endif
595: {
1.121 misha 596: for(HashStringValue::Iterator i(hash); i; i.next(), pos-- )
597: if(!pos){
1.137 moko 598: r.write(*new VString(*new String(i.key(), String::L_TAINTED)));
1.121 misha 599: break;
600: }
601: }
1.105 misha 602: break;
603: }
1.121 misha 604: case AtResultTypeValue:
605: {
1.123 moko 606: #ifdef HASH_ORDER
1.121 misha 607: if(pos == 0) {
1.137 moko 608: r.write(*hash.first_value());
1.121 misha 609: } else if((size_t)pos == count-1) {
1.137 moko 610: r.write(*hash.last_value());
1.123 moko 611: } else
612: #endif
613: {
1.121 misha 614: for(HashStringValue::Iterator i(hash); i; i.next(), pos-- )
615: if(!pos){
1.137 moko 616: r.write(*i.value());
1.121 misha 617: break;
618: }
619: }
620: break;
621: }
622: case AtResultTypeHash:
623: {
1.123 moko 624: #ifdef HASH_ORDER
1.121 misha 625: if(pos == 0) {
1.137 moko 626: r.write(SingleElementHash(hash.first_key(), hash.first_value()));
1.121 misha 627: } else if((size_t)pos == count-1) {
1.137 moko 628: r.write(SingleElementHash(hash.last_key(), 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){
1.137 moko 634: r.write(SingleElementHash(i.key(), i.value()));
1.121 misha 635: break;
636: }
637: }
638: break;
639: }
640: }
1.105 misha 641: }
642: }
643:
1.147 moko 644: extern String table_reverse_name;
645:
646: static void _select(Request& r, MethodParams& params) {
1.154 moko 647: InCycle temp(r);
1.147 moko 648: const String* key_var_name=¶ms.as_string(0, "key-var name must be string");
649: const String* value_var_name=¶ms.as_string(1, "value-var name must be string");
650: Value& vcondition=params.as_expression(2, "condition must be number, bool or expression");
651:
652: if(key_var_name->is_empty()) key_var_name=0;
653: if(value_var_name->is_empty()) value_var_name=0;
654:
655: HashStringValue& source_hash=GET_SELF(r, VHashBase).hash();
656: Value& caller=*r.get_method_frame()->caller();
657:
658: int limit=source_hash.count();
659: bool reverse=false;
1.149 moko 660: bool copy_default=false;
1.147 moko 661:
662: if(params.count()>3)
663: if(HashStringValue* options=params.as_hash(3)) {
664: int valid_options=0;
665: if(Value* vlimit=options->get(sql_limit_name)) {
666: valid_options++;
667: limit=r.process(*vlimit).as_int();
668: }
669: if(Value* vreverse=options->get(table_reverse_name)) {
670: valid_options++;
671: reverse=r.process(*vreverse).as_bool();
672: }
1.149 moko 673: if(Value* vcopy_default=options->get(sql_default_name)) {
674: valid_options++;
675: copy_default=r.process(*vcopy_default).as_bool();
676: }
1.147 moko 677: if(valid_options!=options->count())
678: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
679: }
680:
681: HashStringValue& result_hash=*new HashStringValue();
682:
683: if(limit>0){
1.154 moko 684:
1.147 moko 685: #ifdef HASH_ORDER
686: if(reverse){
687: for(HashStringValue::ReverseIterator i(source_hash); i; i.prev()){
688: if(key_var_name)
689: r.put_element(caller, *key_var_name, new VString(*new String(i.key(), String::L_TAINTED)));
690: if(value_var_name)
691: r.put_element(caller, *value_var_name, i.value());
692:
1.154 moko 693: bool condition=r.process(vcondition).as_bool();
694:
695: if(r.check_skip_break())
696: break;
697:
698: if(condition){
1.147 moko 699: result_hash.put(i.key(), i.value());
700: if(!--limit)
701: break;
702: }
703: }
704: } else {
705: #else
706: {
707: #endif
708: for(HashStringValue::Iterator i(source_hash); i; i.next() ){
709: if(key_var_name)
710: r.put_element(caller, *key_var_name, new VString(*new String(i.key(), String::L_TAINTED)));
711: if(value_var_name)
712: r.put_element(caller, *value_var_name, i.value());
713:
1.154 moko 714: bool condition=r.process(vcondition).as_bool();
715:
716: if(r.check_skip_break())
717: break;
718:
719: if(condition){
1.147 moko 720: result_hash.put(i.key(), i.value());
721: if(!--limit)
722: break;
723: }
724: }
725: }
726: }
727:
1.149 moko 728: VHash *result=new VHash(result_hash);
729: if(copy_default){
730: result->set_default(GET_SELF(r, VHashBase).get_default());
731: }
732:
733: r.write(*result);
1.147 moko 734: }
735:
736: static void _reverse(Request& r, MethodParams& params) {
1.148 moko 737: VHashBase& self=GET_SELF(r, VHashBase);
738: HashStringValue& source_hash=self.hash();
1.147 moko 739: HashStringValue& result_hash=*new HashStringValue();
740:
741: #ifdef HASH_ORDER
742: for(HashStringValue::ReverseIterator i(source_hash); i; i.prev())
743: result_hash.put(i.key(), i.value());
744: #else
745: for(HashStringValue::Iterator i(source_hash); i; i.next() )
746: result_hash.put(i.key(), i.value());
747: #endif
1.148 moko 748:
749: VHashBase& result=*new VHash(result_hash);
750: if(Value* vdefault=self.get_default())
751: result.set_default(vdefault);
752:
753: r.write(result);
1.147 moko 754: }
755:
1.150 moko 756:
757: static void _rename(Request& r, MethodParams& params) {
1.151 moko 758: HashStringValue& hash=GET_SELF(r, VHashBase).hash();
759:
760: if(params.count()>1){
761: const String& key_from=params.as_string(0, "from key must be string");
762: const String& key_to=params.as_string(1, "to key must be string");
763:
764: hash.rename(key_from, key_to);
1.152 moko 765: } else {
1.153 moko 766: HashStringValue* names=params.as_hash(0,"single parameter");
1.150 moko 767:
1.151 moko 768: for(HashStringValue::Iterator i(*names); i; i.next())
769: hash.rename(i.key(), i.value()->as_string());
770: }
1.150 moko 771: }
772:
773:
1.1 paf 774: // constructor
775:
1.57 paf 776: MHash::MHash(): Methoded("hash")
1.39 paf 777: {
1.21 parser 778: // ^hash::create[[copy_from]]
1.57 paf 779: add_native_method("create", Method::CT_DYNAMIC, _create_or_add, 0, 1);
1.22 parser 780: // ^hash.add[add_from]
1.57 paf 781: add_native_method("add", Method::CT_DYNAMIC, _create_or_add, 1, 1);
1.22 parser 782: // ^hash.sub[sub_from]
783: add_native_method("sub", Method::CT_DYNAMIC, _sub, 1, 1);
784: // ^a.union[b] = hash
785: add_native_method("union", Method::CT_DYNAMIC, _union, 1, 1);
1.155 moko 786: // ^a.intersection[b][options hash] = hash
787: add_native_method("intersection", Method::CT_DYNAMIC, _intersection, 1, 2);
1.22 parser 788: // ^a.intersects[b] = bool
789: add_native_method("intersects", Method::CT_DYNAMIC, _intersects, 1, 1);
1.25 paf 790:
791: // ^a.delete[key]
1.119 misha 792: add_native_method("delete", Method::CT_DYNAMIC, _delete, 0, 1);
1.2 parser 793:
1.82 misha 794: // ^a.contains[key]
795: add_native_method("contains", Method::CT_DYNAMIC, _contains, 1, 1);
796: // backward
797: add_native_method("contain", Method::CT_DYNAMIC, _contains, 1, 1);
1.80 misha 798:
799: // ^hash::sql[query][options hash]
1.33 paf 800: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.2 parser 801:
1.68 paf 802: // ^hash._keys[[column name]]
1.124 moko 803: add_native_method("_keys", Method::CT_DYNAMIC, _keys, 0, 1);
1.16 parser 804:
805: // ^hash._count[]
1.124 moko 806: add_native_method("_count", Method::CT_DYNAMIC, _count, 0, 0);
1.26 paf 807:
808: // ^hash.foreach[key;value]{code}[delim]
809: add_native_method("foreach", Method::CT_DYNAMIC, _foreach, 2+1, 2+1+1);
1.105 misha 810:
1.122 moko 811: // ^hash.sort[key;value]{string-key-maker}[[asc|desc]]
812: // ^hash.sort[key;value](numeric-key-maker)[[asc|desc]]
1.147 moko 813: add_native_method("sort", Method::CT_DYNAMIC, _sort, 3, 4);
814:
815: // ^hash.select[key;value](bool-condition)[options hash]
816: add_native_method("select", Method::CT_DYNAMIC, _select, 3, 4);
817:
818: // ^hash.reverse[]
819: add_native_method("reverse", Method::CT_DYNAMIC, _reverse, 0, 0);
1.122 moko 820:
1.121 misha 821: // ^hash._at[first|last[;'key'|'value'|'hash']]
822: // ^hash._at([-+]offset)[['key'|'value'|'hash']]
823: add_native_method("_at", Method::CT_DYNAMIC, _at, 1, 2);
1.124 moko 824:
1.150 moko 825: // ^hash.rename[from;to]
1.151 moko 826: // ^hash.rename[ $.from[to] ... ]
827: add_native_method("rename", Method::CT_DYNAMIC, _rename, 1, 2);
1.150 moko 828:
1.124 moko 829: #ifdef FEATURE_GET_ELEMENT4CALL
830: // aliases without "_"
831: add_native_method("keys", Method::CT_DYNAMIC, _keys, 0, 1);
832: add_native_method("count", Method::CT_DYNAMIC, _count, 0, 0);
833: add_native_method("at", Method::CT_DYNAMIC, _at, 1, 2);
834: #endif
835:
1.1 paf 836: }
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