Annotation of parser3/src/classes/hash.C, revision 1.54.2.13.2.7
1.1 paf 1: /** @file
2: Parser: @b hash parser class.
3:
1.54.2.2 paf 4: Copyright (c) 2001-2003 ArtLebedev Group (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:
1.54.2.13.2.7! (paf 8:: static const char* IDENT_HASH_C="$Date: 2003/03/21 15:36:03 $";
1.1 paf 9:
10: #include "classes.h"
1.54.2.4 paf 11: #include "pa_vmethod_frame.h"
12:
1.1 paf 13: #include "pa_request.h"
14: #include "pa_vhash.h"
1.6 parser 15: #include "pa_vvoid.h"
1.2 parser 16: #include "pa_sql_connection.h"
1.9 parser 17: #include "pa_vtable.h"
1.22 parser 18: #include "pa_vbool.h"
1.26 paf 19: #include "pa_vmethod_frame.h"
1.2 parser 20:
1.1 paf 21: // class
22:
1.54.2.6 paf 23: class MHash: public Methoded {
1.2 parser 24: public: // VStateless_class
1.54.2.13.2.5 (paf 25:: Value* create_new_value() { return Value*(new VHash()); }
1.2 parser 26:
1.1 paf 27: public:
1.54.2.6 paf 28: MHash();
1.1 paf 29: public: // Methoded
1.2 parser 30: bool used_directly() { return true; }
1.1 paf 31: };
1.54.2.6 paf 32:
33: // global variable
34:
1.54.2.11 paf 35: DECLARE_CLASS_VAR(hash, new MHash, 0);
1.54.2.6 paf 36:
1.1 paf 37: // methods
38:
1.11 parser 39: #ifndef DOXYGEN
1.52 paf 40: class Hash_sql_event_handlers: public SQL_Driver_query_event_handlers {
1.54.2.13.2.1 (paf 41:: const String& method_name;
42:: const String& statement_string; const char* statement_cstr;
1.54.2.6 paf 43: bool distinct;
44: HashStringValue& rows_hash;
45: HashStringValue* row_hash;
46: int column_index;
47: ArrayString columns;
48: int row_index;
1.11 parser 49: public:
1.54.2.13.2.1 (paf 50:: Hash_sql_event_handlers(const String& amethod_name,
51:: const String& astatement_string, const char* astatement_cstr,
1.49 paf 52: bool adistinct,
1.54.2.6 paf 53: HashStringValue& arows_hash):
1.11 parser 54: method_name(amethod_name),
1.54.2.13 paf 55: statement_string(astatement_string), statement_cstr(astatement_cstr),
1.49 paf 56: distinct(adistinct),
1.11 parser 57: rows_hash(arows_hash),
1.54.2.13.2.7! (paf 58:: row_hash(),
1.54.2.13 paf 59: column_index(0),
60: row_index(0){
1.11 parser 61: }
1.53 paf 62: bool add_column(SQL_Error& error, void *ptr, size_t size) {
63: try {
1.54.2.13.2.1 (paf 64:: const String& column(new String);
1.53 paf 65: column->APPEND_TAINTED(
1.54.2.2 paf 66: (const char* )ptr, size,
1.53 paf 67: statement_cstr, 0);
68: columns+=column;
69:
70: return false;
71: } catch(...) {
72: error=SQL_Error("exception occured in Hash_sql_event_handlers::add_column");
73: return true;
74: }
1.11 parser 75: }
1.53 paf 76: bool before_rows(SQL_Error& error) {
1.54.2.6 paf 77: if(columns.count()<=1) {
1.53 paf 78: error=SQL_Error("parser.runtime",
1.54.2.6 paf 79: /*method_name,*/
1.11 parser 80: "column count must be more than 1 to create a hash");
1.53 paf 81: return true;
82: }
83:
84: return false;
1.11 parser 85: }
1.53 paf 86: bool add_row(SQL_Error& /*error*/) {
1.11 parser 87: column_index=0;
1.53 paf 88: return false;
1.11 parser 89: }
1.53 paf 90: bool add_row_cell(SQL_Error& error, void *ptr, size_t size) {
91: try {
1.54.2.13.2.1 (paf 92:: const String& cell(new String);
1.53 paf 93: if(size)
94: cell->APPEND_TAINTED(
1.54.2.2 paf 95: (const char* )ptr, size,
1.53 paf 96: statement_cstr, row_index++);
97: if(column_index==0) {
1.54.2.13.2.5 (paf 98:: VHash* row_vhash(new VHash);
1.54.2.6 paf 99: row_hash=&row_vhash->hash();
100: if(rows_hash.put_dont_replace(cell, row_vhash)) // put. existed?
1.53 paf 101: if(!distinct) {
102: error=SQL_Error("parser.runtime",
1.54.2.6 paf 103: /*cell,*/
1.53 paf 104: "duplicate key");
105: return true;
106: }
107: } else
1.54.2.13.2.5 (paf 108:: row_hash->put(columns[column_index], Value*(new VString(cell)));
1.53 paf 109: column_index++;
110:
111: return false;
112: } catch(...) {
113: error=SQL_Error("exception occured in Hash_sql_event_handlers::add_row_cell");
114: return true;
115: }
1.11 parser 116: }
117:
118: };
119: #endif
120:
1.54.2.6 paf 121: static void copy_all_overwrite_to(
122: HashStringValue::key_type key,
123: HashStringValue::value_type value,
124: HashStringValue* dest) {
125: dest->put(key, value);
1.20 parser 126: }
1.54.2.13.2.1 (paf 127:: static void _create_or_add(Request& r, const String& method_name, MethodParams* params) {
1.54.2.10 paf 128: if(params->count()) {
1.54.2.13.2.5 (paf 129:: Value* vb=params->as_no_junction(0, "param must be hash");
1.54.2.6 paf 130: if(HashStringValue* b=vb->get_hash(method_name))
131: b->for_each(copy_all_overwrite_to, &(GET_SELF(r, VHash).hash()));
1.20 parser 132: }
133: }
134:
1.54.2.6 paf 135: static void remove_key_from(
136: HashStringValue::key_type key,
137: HashStringValue::value_type /*value*/,
138: HashStringValue* dest) {
139: dest->remove(key);
1.22 parser 140: }
1.54.2.13.2.1 (paf 141:: static void _sub(Request& r, const String& method_name, MethodParams* params) {
1.54.2.13.2.5 (paf 142:: Value* vb=params->as_no_junction(0, "param must be hash");
1.54.2.6 paf 143: if(HashStringValue* b=vb->get_hash(method_name))
144: b->for_each(remove_key_from, &GET_SELF(r, VHash).hash());
1.22 parser 145: }
146:
1.54.2.6 paf 147: static void copy_all_dontoverwrite_to(
148: HashStringValue::key_type key,
149: HashStringValue::value_type value,
150: HashStringValue* dest) {
151: dest->put_dont_replace(key, value);
1.22 parser 152: }
1.54.2.13.2.1 (paf 153:: static void _union(Request& r, const String& method_name, MethodParams* params) {
1.22 parser 154: // dest = copy of self
1.54.2.13.2.5 (paf 155:: Value* result(new VHash(GET_SELF(r, VHash).hash()));
1.22 parser 156: // dest += b
1.54.2.13.2.5 (paf 157:: Value* vb=params->as_no_junction(0, "param must be hash");
1.54.2.6 paf 158: if(HashStringValue* b=vb->get_hash(method_name))
1.54.2.13.2.6 (paf 159:: b->for_each(copy_all_dontoverwrite_to, result->get_hash());
1.22 parser 160:
161: // return result
162: r.write_no_lang(result);
163: }
164:
165: #ifndef DOXYGEN
166: struct Copy_intersection_to_info {
1.54.2.6 paf 167: HashStringValue* b;
168: HashStringValue* dest;
1.22 parser 169: };
170: #endif
1.54.2.6 paf 171: static void copy_intersection_to(
172: HashStringValue::key_type key,
173: HashStringValue::value_type value,
174: Copy_intersection_to_info *info) {
175: if(info->b->get(key))
176: info->dest->put_dont_replace(key, value);
1.22 parser 177: }
1.54.2.13.2.1 (paf 178:: static void _intersection(Request& r, const String& method_name, MethodParams* params) {
1.54.2.13.2.5 (paf 179:: Value* result(new VHash);
1.22 parser 180: // dest += b
1.54.2.13.2.5 (paf 181:: Value* vb=params->as_no_junction(0, "param must be hash");
1.54.2.6 paf 182: if(HashStringValue* b=vb->get_hash(method_name)) {
1.54.2.13.2.6 (paf 183:: Copy_intersection_to_info info={b, result->get_hash()};
1.54.2.6 paf 184: GET_SELF(r, VHash).hash().for_each(copy_intersection_to, &info);
1.22 parser 185: }
186:
187: // return result
1.54.2.6 paf 188: r.write_no_lang(result);
1.22 parser 189: }
190:
1.54.2.6 paf 191: static bool intersects(
192: HashStringValue::key_type key,
193: HashStringValue::value_type /*value*/,
194: HashStringValue* b) {
195: return b->get(key);
1.22 parser 196: }
197:
1.54.2.13.2.1 (paf 198:: static void _intersects(Request& r, const String& method_name, MethodParams* params) {
1.54.2.6 paf 199: bool result=false;
1.22 parser 200:
1.54.2.13.2.5 (paf 201:: Value* vb=params->as_no_junction(0, "param must be hash");
1.54.2.6 paf 202: if(HashStringValue* b=vb->get_hash(method_name))
203: result=GET_SELF(r, VHash).hash().first_that(intersects, b);
1.22 parser 204:
205: // return result
1.54.2.13.2.5 (paf 206:: r.write_no_lang(Value*(new VBool(result)));
1.22 parser 207: }
208:
209:
1.54.2.13.2.1 (paf 210:: extern const String& sql_limit_name;
211:: extern const String& sql_offset_name;
212:: extern const String& sql_default_name;
213:: extern const String& sql_distinct_name;
214:: static void _sql(Request& r, const String& method_name, MethodParams* params) {
1.54.2.13.2.5 (paf 215:: Value* statement=params->as_junction(0, "statement must be code");
1.2 parser 216:
217: ulong limit=0;
1.33 paf 218: ulong offset=0;
1.49 paf 219: bool distinct=false;
1.54.2.10 paf 220: if(params->count()>1) {
1.54.2.13.2.5 (paf 221:: Value* voptions=params->as_no_junction(1, "options must be hash, not code");
1.54.2.6 paf 222: if(!voptions->is_string())
1.54.2.7 paf 223: if(HashStringValue* options=voptions->get_hash(method_name)) {
1.49 paf 224: int valid_options=0;
1.54.2.13.2.5 (paf 225:: if(Value* vlimit=options->get(sql_limit_name)) {
1.49 paf 226: valid_options++;
1.54.2.7 paf 227: limit=(ulong)r.process_to_value(vlimit)->as_double();
1.49 paf 228: }
1.54.2.13.2.5 (paf 229:: if(Value* voffset=options->get(sql_offset_name)) {
1.49 paf 230: valid_options++;
1.54.2.7 paf 231: offset=(ulong)r.process_to_value(voffset)->as_double();
1.49 paf 232: }
1.54.2.13.2.5 (paf 233:: if(Value* vdistinct=options->get(sql_distinct_name)) {
1.49 paf 234: valid_options++;
1.54.2.7 paf 235: distinct=r.process_to_value(vdistinct)->as_bool();
1.49 paf 236: }
1.54.2.7 paf 237: if(valid_options!=options->count())
1.49 paf 238: throw Exception("parser.runtime",
1.54.2.5 paf 239: method_name,
1.49 paf 240: "called with invalid option");
1.33 paf 241: } else
1.36 paf 242: throw Exception("parser.runtime",
1.54.2.5 paf 243: method_name,
1.33 paf 244: "options must be hash");
1.2 parser 245: }
246:
1.54.2.13.2.5 (paf 247:: Temp_lang temp_lang(r, String::L_SQL);
1.54.2.13.2.1 (paf 248:: const String& statement_string=r.process_to_string(statement);
1.54.2.2 paf 249: const char* statement_cstr=
1.54.2.13.2.5 (paf 250:: statement_string->cstr(r.String::L_UNSPECIFIED, r.connection(method_name));
1.54.2.7 paf 251: HashStringValue& hash=GET_SELF(r, VHash).hash(method_name);
1.11 parser 252: hash.clear();
1.54.2.7 paf 253: Hash_sql_event_handlers handlers(method_name,
1.49 paf 254: statement_string, statement_cstr,
255: distinct,
256: hash);
1.54.2.7 paf 257: r.connection(method_name)->query(
1.23 parser 258: statement_cstr, offset, limit,
1.45 paf 259: handlers,
260: statement_string);
1.2 parser 261: }
262:
1.54.2.7 paf 263: static void keys_collector(
264: HashStringValue::key_type key,
265: HashStringValue::value_type value,
266: Table *table) {
267: Table::element_type row(new ArrayString);
268: *row+=key;
1.54.2.12 paf 269: *table+=row;
1.9 parser 270: }
1.54.2.13.2.1 (paf 271:: static void _keys(Request& r, const String& method_name, MethodParams* ) {
1.54.2.7 paf 272: Table::columns_type columns(new ArrayString);
1.54.2.13.2.1 (paf 273:: *columns+=String* (new String("key"));
274:: Table* table(new Table(method_name, columns));
1.9 parser 275:
1.54.2.7 paf 276: GET_SELF(r, VHash).hash(method_name).for_each(keys_collector, table.get());
1.9 parser 277:
1.54.2.13.2.5 (paf 278:: r.write_no_lang(Value*(new VTable(table)));
1.9 parser 279: }
280:
1.54.2.13.2.1 (paf 281:: static void _count(Request& r, const String& method_name, MethodParams* ) {
1.54.2.13.2.5 (paf 282:: r.write_no_lang(Value*(new VInt(GET_SELF(r, VHash).hash(method_name).count())));
1.16 parser 283: }
284:
1.54.2.13.2.1 (paf 285:: static void _delete(Request& r, const String& method_name, MethodParams* params) {
1.25 paf 286:
1.54.2.10 paf 287: GET_SELF(r, VHash).hash(method_name).remove(params->as_string(0, "key must be string"));
1.25 paf 288: }
289:
1.26 paf 290: #ifndef DOXYGEN
291: struct Foreach_info {
292: Request *r;
1.54.2.13.2.1 (paf 293:: const String& key_var_name;
294:: const String& value_var_name;
1.54.2.13.2.5 (paf 295:: Value* body_code;
296:: Value* delim_maybe_code;
1.26 paf 297:
1.54.2.13.2.5 (paf 298:: const VString& vkey;
1.26 paf 299: bool need_delim;
300: };
301: #endif
1.54.2.7 paf 302: static void one_foreach_cycle(
303: HashStringValue::key_type akey,
304: HashStringValue::value_type avalue,
305: Foreach_info *info) {
306: info->vkey->set_string(akey);
307: Value& ncontext=*info->r->get_method_frame()->caller();
308: ncontext.put_element(info->key_var_name, info->vkey, false);
309: ncontext.put_element(info->value_var_name, avalue, false);
310:
311: StringOrValue sv_processed=info->r->process(info->body_code);
1.54.2.13.2.1 (paf 312:: const String& s_processed=sv_processed.get_string();
1.54.2.13.2.4 (paf 313:: if(info->delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
1.54.2.7 paf 314: if(info->need_delim) // need delim & iteration produced string?
315: info->r->write_pass_lang(info->r->process(info->delim_maybe_code));
316: info->need_delim=true;
1.26 paf 317: }
1.54.2.7 paf 318: info->r->write_pass_lang(sv_processed);
1.26 paf 319: }
1.54.2.13.2.1 (paf 320:: static void _foreach(Request& r, const String& method_name, MethodParams* params) {
1.54.2.7 paf 321: Foreach_info info;
322: info.r=&r;
1.54.2.10 paf 323: info.key_var_name=params->as_string(0, "key-var name must be string");
324: info.value_var_name=params->as_string(1, "value-var name must be string");
325: info.body_code=params->as_junction(2, "body must be code");
1.54.2.13.2.5 (paf 326:: info.delim_maybe_code=params->count()>3?params->get(3):0;
1.54.2.13.2.1 (paf 327:: info.vkey=VString* (new VString);
1.54.2.7 paf 328:
329: VHash& self=GET_SELF(r, VHash);
330: HashStringValue& hash=self.hash(method_name);
1.28 paf 331: VHash_lock lock(self);
332: hash.for_each(one_foreach_cycle, &info);
1.26 paf 333: }
334:
1.1 paf 335: // constructor
336:
1.54.2.6 paf 337: MHash::MHash(): Methoded("hash")
1.39 paf 338: {
1.21 parser 339: // ^hash::create[[copy_from]]
1.22 parser 340: add_native_method("create", Method::CT_DYNAMIC, _create_or_add, 0, 1);
341: // ^hash.add[add_from]
342: add_native_method("add", Method::CT_DYNAMIC, _create_or_add, 1, 1);
343: // ^hash.sub[sub_from]
344: add_native_method("sub", Method::CT_DYNAMIC, _sub, 1, 1);
345: // ^a.union[b] = hash
346: add_native_method("union", Method::CT_DYNAMIC, _union, 1, 1);
347: // ^a.intersection[b] = hash
348: add_native_method("intersection", Method::CT_DYNAMIC, _intersection, 1, 1);
349: // ^a.intersects[b] = bool
350: add_native_method("intersects", Method::CT_DYNAMIC, _intersects, 1, 1);
1.25 paf 351:
352: // ^a.delete[key]
353: add_native_method("delete", Method::CT_DYNAMIC, _delete, 1, 1);
1.2 parser 354:
1.33 paf 355: // ^hash:sql[query][$.limit(1) $.offset(2)]
356: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.2 parser 357:
1.14 parser 358: // ^hash._keys[]
1.13 parser 359: add_native_method("_keys", Method::CT_DYNAMIC, _keys, 0, 0);
1.16 parser 360:
361: // ^hash._count[]
362: add_native_method("_count", Method::CT_DYNAMIC, _count, 0, 0);
1.26 paf 363:
364: // ^hash.foreach[key;value]{code}[delim]
365: add_native_method("foreach", Method::CT_DYNAMIC, _foreach, 2+1, 2+1+1);
1.1 paf 366: }
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