Annotation of parser3/src/classes/hash.C, revision 1.78
1.1 paf 1: /** @file
2: Parser: @b hash parser class.
3:
1.75 paf 4: Copyright (c) 2001-2005 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:
1.78 ! paf 8: static const char * const IDENT_HASH_C="$Date: 2006/04/09 13:38:46 $";
1.1 paf 9:
10: #include "classes.h"
1.57 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:
1.57 paf 23: class MHash: public Methoded {
1.2 parser 24: public: // VStateless_class
1.74 paf 25: Value* create_new_value(Pool&, HashStringValue&) { return new VHash(); }
1.2 parser 26:
1.1 paf 27: public:
1.57 paf 28: MHash();
1.1 paf 29: public: // Methoded
1.2 parser 30: bool used_directly() { return true; }
1.1 paf 31: };
32:
1.57 paf 33: // global variable
34:
35: DECLARE_CLASS_VAR(hash, new MHash, 0);
36:
1.77 paf 37: // externs
38:
39: extern String cycle_data_name;
40:
1.1 paf 41: // methods
42:
1.11 parser 43: #ifndef DOXYGEN
1.52 paf 44: class Hash_sql_event_handlers: public SQL_Driver_query_event_handlers {
1.57 paf 45: const String& statement_string; const char* statement_cstr;
46: bool distinct;
47: HashStringValue& rows_hash;
48: HashStringValue* row_hash;
49: int column_index;
50: ArrayString columns;
1.67 paf 51: bool only_one_column;
52: static VBool only_one_column_value;
1.11 parser 53: public:
1.57 paf 54: Hash_sql_event_handlers(
55: const String& astatement_string, const char* astatement_cstr,
1.49 paf 56: bool adistinct,
1.57 paf 57: HashStringValue& arows_hash):
58: statement_string(astatement_string), statement_cstr(astatement_cstr),
1.49 paf 59: distinct(adistinct),
1.11 parser 60: rows_hash(arows_hash),
1.57 paf 61: row_hash(0),
1.67 paf 62: column_index(0),
63: only_one_column(false) {
1.11 parser 64: }
1.57 paf 65: bool add_column(SQL_Error& error, const char* str, size_t length) {
1.53 paf 66: try {
1.57 paf 67: columns+=new String(str, length, true);
1.53 paf 68: return false;
69: } catch(...) {
70: error=SQL_Error("exception occured in Hash_sql_event_handlers::add_column");
71: return true;
72: }
1.11 parser 73: }
1.53 paf 74: bool before_rows(SQL_Error& error) {
1.67 paf 75: if(columns.count()<1) {
76: error=SQL_Error("parser.runtime", "no columns");
1.53 paf 77: return true;
78: }
1.67 paf 79: only_one_column=columns.count()==1;
1.53 paf 80:
81: return false;
1.11 parser 82: }
1.53 paf 83: bool add_row(SQL_Error& /*error*/) {
1.11 parser 84: column_index=0;
1.53 paf 85: return false;
1.11 parser 86: }
1.57 paf 87: bool add_row_cell(SQL_Error& error, const char *ptr, size_t length) {
1.53 paf 88: try {
1.57 paf 89: String& cell=*new String;
90: if(length)
91: cell.append_know_length(ptr, length, String::L_TAINTED);
1.69 paf 92: bool duplicate=false;
93: if(only_one_column) {
94: duplicate=rows_hash.put_dont_replace(cell, &only_one_column_value); // put. existed?
95: } else if(column_index==0) {
1.57 paf 96: VHash* row_vhash=new VHash;
97: row_hash=&row_vhash->hash();
1.69 paf 98: duplicate=rows_hash.put_dont_replace(cell, row_vhash); // put. existed?
1.53 paf 99: } else
1.57 paf 100: row_hash->put(*columns[column_index], new VString(cell));
1.69 paf 101:
102: if(duplicate & !distinct) {
103: error=SQL_Error("parser.runtime", "duplicate key");
104: return true;
105: }
106:
1.53 paf 107: column_index++;
108: return false;
109: } catch(...) {
110: error=SQL_Error("exception occured in Hash_sql_event_handlers::add_row_cell");
111: return true;
112: }
1.11 parser 113: }
114:
115: };
1.67 paf 116: VBool Hash_sql_event_handlers::only_one_column_value(true);
117:
1.11 parser 118: #endif
119:
1.57 paf 120: static void copy_all_overwrite_to(
121: HashStringValue::key_type key,
122: HashStringValue::value_type value,
123: HashStringValue* dest) {
124: dest->put(key, value);
125: }
126: static void _create_or_add(Request& r, MethodParams& params) {
127: if(params.count()) {
1.66 paf 128: Value& vsrc=params.as_no_junction(0, "param must be hash");
129: if(HashStringValue* src=vsrc.get_hash()) {
1.72 paf 130: VHash& self=GET_SELF(r, VHash);
131: HashStringValue* self_hash=&(self.hash());
132: if(src==self_hash) // same: doing nothing
1.66 paf 133: return;
1.77 paf 134: src->for_each<HashStringValue*>(copy_all_overwrite_to, self_hash);
1.72 paf 135:
136: if(VHash* vhash_src=static_cast<VHash*>(vsrc.as(VHASH_TYPE, false)))
1.78 ! paf 137: {
! 138: if(Value* vdefault=vhash_src->get_default())
! 139: {
! 140: if(vdefault->is_defined())
! 141: {
! 142: self.set_default(vdefault);
! 143: }
! 144: }
! 145: }
1.66 paf 146: }
1.20 parser 147: }
148: }
1.22 parser 149:
1.57 paf 150: static void remove_key_from(
151: HashStringValue::key_type key,
152: HashStringValue::value_type /*value*/,
153: HashStringValue* dest) {
154: dest->remove(key);
155: }
156: static void _sub(Request& r, MethodParams& params) {
1.66 paf 157: Value& vsrc=params.as_no_junction(0, "param must be hash");
158: if(HashStringValue* src=vsrc.get_hash()) {
159: HashStringValue* self=&(GET_SELF(r, VHash).hash());
160: if(src==self) { // same: clearing
161: self->clear();
162: return;
163: }
1.77 paf 164: src->for_each<HashStringValue*>(remove_key_from, self);
1.66 paf 165: }
1.57 paf 166: }
167:
168: static void copy_all_dontoverwrite_to(
169: HashStringValue::key_type key,
170: HashStringValue::value_type value,
171: HashStringValue* dest) {
172: dest->put_dont_replace(key, value);
1.22 parser 173: }
1.57 paf 174: static void _union(Request& r, MethodParams& params) {
1.22 parser 175: // dest = copy of self
1.57 paf 176: Value& result=*new VHash(GET_SELF(r, VHash).hash());
1.22 parser 177: // dest += b
1.66 paf 178: Value& vsrc=params.as_no_junction(0, "param must be hash");
179: if(HashStringValue* src=vsrc.get_hash())
1.77 paf 180: src->for_each<HashStringValue*>(copy_all_dontoverwrite_to, result.get_hash());
1.22 parser 181:
182: // return result
183: r.write_no_lang(result);
184: }
185:
186: #ifndef DOXYGEN
187: struct Copy_intersection_to_info {
1.57 paf 188: HashStringValue* b;
189: HashStringValue* dest;
1.22 parser 190: };
191: #endif
1.57 paf 192: static void copy_intersection_to(
193: HashStringValue::key_type key,
194: HashStringValue::value_type value,
195: Copy_intersection_to_info *info) {
196: if(info->b->get(key))
197: info->dest->put_dont_replace(key, value);
1.22 parser 198: }
1.57 paf 199: static void _intersection(Request& r, MethodParams& params) {
200: Value& result=*new VHash;
1.22 parser 201: // dest += b
1.57 paf 202: Value& vb=params.as_no_junction(0, "param must be hash");
203: if(HashStringValue* b=vb.get_hash()) {
204: Copy_intersection_to_info info={b, result.get_hash()};
1.77 paf 205: GET_SELF(r, VHash).hash().for_each<Copy_intersection_to_info*>(copy_intersection_to, &info);
1.22 parser 206: }
207:
208: // return result
1.57 paf 209: r.write_no_lang(result);
1.22 parser 210: }
211:
1.57 paf 212: static bool intersects(
213: HashStringValue::key_type key,
214: HashStringValue::value_type /*value*/,
215: HashStringValue* b) {
216: return b->get(key)!=0;
1.22 parser 217: }
218:
1.57 paf 219: static void _intersects(Request& r, MethodParams& params) {
220: bool result=false;
221:
222: Value& vb=params.as_no_junction(0, "param must be hash");
223: if(HashStringValue* b=vb.get_hash())
1.77 paf 224: result=GET_SELF(r, VHash).hash().first_that<HashStringValue*>(intersects, b)!=0;
1.22 parser 225:
226: // return result
1.57 paf 227: r.write_no_lang(*new VBool(result));
1.22 parser 228: }
229:
230:
1.71 paf 231: extern String sql_bind_name;
1.57 paf 232: extern String sql_limit_name;
233: extern String sql_offset_name;
234: extern String sql_default_name;
235: extern String sql_distinct_name;
1.71 paf 236: extern int marshal_binds(HashStringValue& hash, SQL_Driver::Placeholder*& placeholders);
237: extern void unmarshal_bind_updates(HashStringValue& hash, int placeholder_count, SQL_Driver::Placeholder* placeholders);
238:
1.57 paf 239: static void _sql(Request& r, MethodParams& params) {
240: Value& statement=params.as_junction(0, "statement must be code");
1.2 parser 241:
1.71 paf 242: HashStringValue* bind=0;
1.2 parser 243: ulong limit=0;
1.33 paf 244: ulong offset=0;
1.49 paf 245: bool distinct=false;
1.57 paf 246: if(params.count()>1) {
247: Value& voptions=params.as_no_junction(1, "options must be hash, not code");
1.76 paf 248: if(voptions.is_defined() && !voptions.is_string())
1.57 paf 249: if(HashStringValue* options=voptions.get_hash()) {
1.49 paf 250: int valid_options=0;
1.71 paf 251: if(Value* vbind=options->get(sql_bind_name)) {
252: valid_options++;
253: bind=vbind->get_hash();
254: }
1.57 paf 255: if(Value* vlimit=options->get(sql_limit_name)) {
1.49 paf 256: valid_options++;
1.37 paf 257: limit=(ulong)r.process_to_value(*vlimit).as_double();
1.49 paf 258: }
1.57 paf 259: if(Value* voffset=options->get(sql_offset_name)) {
1.49 paf 260: valid_options++;
1.37 paf 261: offset=(ulong)r.process_to_value(*voffset).as_double();
1.49 paf 262: }
1.57 paf 263: if(Value* vdistinct=options->get(sql_distinct_name)) {
1.49 paf 264: valid_options++;
265: distinct=r.process_to_value(*vdistinct).as_bool();
266: }
1.57 paf 267: if(valid_options!=options->count())
1.49 paf 268: throw Exception("parser.runtime",
1.57 paf 269: 0,
1.49 paf 270: "called with invalid option");
1.33 paf 271: } else
1.36 paf 272: throw Exception("parser.runtime",
1.57 paf 273: 0,
1.33 paf 274: "options must be hash");
1.2 parser 275: }
276:
1.71 paf 277: SQL_Driver::Placeholder* placeholders=0;
278: uint placeholders_count=0;
279: if(bind)
280: placeholders_count=marshal_binds(*bind, placeholders);
281:
1.57 paf 282: Temp_lang temp_lang(r, String::L_SQL);
1.37 paf 283: const String& statement_string=r.process_to_string(statement);
1.57 paf 284: const char* statement_cstr=
285: statement_string.cstr(String::L_UNSPECIFIED, r.connection());
286: HashStringValue& hash=GET_SELF(r, VHash).hash();
1.11 parser 287: hash.clear();
1.57 paf 288: Hash_sql_event_handlers handlers(
1.49 paf 289: statement_string, statement_cstr,
290: distinct,
291: hash);
1.57 paf 292: r.connection()->query(
1.70 paf 293: statement_cstr,
1.73 paf 294: placeholders_count, placeholders,
1.70 paf 295: offset, limit,
1.45 paf 296: handlers,
297: statement_string);
1.71 paf 298:
299: if(bind)
300: unmarshal_bind_updates(*bind, placeholders_count, placeholders);
1.2 parser 301: }
302:
1.57 paf 303: static void keys_collector(
304: HashStringValue::key_type key,
1.61 paf 305: HashStringValue::value_type,
1.57 paf 306: Table *table) {
307: Table::element_type row(new ArrayString);
308: *row+=new String(key, String::L_TAINTED);
309: *table+=row;
1.9 parser 310: }
1.68 paf 311: static void _keys(Request& r, MethodParams& params) {
312: const String* keys_column_name;
313: if(params.count()>0)
314: keys_column_name=¶ms.as_string(0, "column name must be string");
315: else
316: keys_column_name=new String("key");
317:
1.57 paf 318: Table::columns_type columns(new ArrayString);
1.68 paf 319: *columns+=keys_column_name;
1.57 paf 320: Table* table=new Table(columns);
1.9 parser 321:
1.77 paf 322: GET_SELF(r, VHash).hash().for_each<Table*>(keys_collector, table);
1.9 parser 323:
1.57 paf 324: r.write_no_lang(*new VTable(table));
1.9 parser 325: }
326:
1.57 paf 327: static void _count(Request& r, MethodParams&) {
328: r.write_no_lang(*new VInt(GET_SELF(r, VHash).hash().count()));
1.16 parser 329: }
330:
1.57 paf 331: static void _delete(Request& r, MethodParams& params) {
1.25 paf 332:
1.57 paf 333: GET_SELF(r, VHash).hash().remove(params.as_string(0, "key must be string"));
1.25 paf 334: }
335:
1.26 paf 336: #ifndef DOXYGEN
1.59 paf 337: struct Foreach_info {
1.26 paf 338: Request *r;
339: const String* key_var_name;
340: const String* value_var_name;
1.57 paf 341: Value* body_code;
342: Value* delim_maybe_code;
1.26 paf 343:
1.57 paf 344: VString* vkey;
1.26 paf 345: bool need_delim;
346: };
347: #endif
1.77 paf 348: static bool one_foreach_cycle(
1.57 paf 349: HashStringValue::key_type akey,
350: HashStringValue::value_type avalue,
1.59 paf 351: Foreach_info *info) {
1.57 paf 352: info->vkey->set_string(*new String(akey, String::L_TAINTED));
353: Value& ncontext=*info->r->get_method_frame()->caller();
1.74 paf 354: ncontext.put_element(ncontext, *info->key_var_name, info->vkey, false);
355: ncontext.put_element(ncontext, *info->value_var_name, avalue, false);
1.57 paf 356:
357: StringOrValue sv_processed=info->r->process(*info->body_code);
1.77 paf 358: Request::Skip lskip=info->r->get_skip(); info->r->set_skip(Request::SKIP_NOTHING);
1.57 paf 359: const String* s_processed=sv_processed.get_string();
360: if(info->delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
361: if(info->need_delim) // need delim & iteration produced string?
362: info->r->write_pass_lang(info->r->process(*info->delim_maybe_code));
363: info->need_delim=true;
1.26 paf 364: }
1.57 paf 365: info->r->write_pass_lang(sv_processed);
1.77 paf 366:
367: return lskip==Request::SKIP_BREAK;
1.26 paf 368: }
1.57 paf 369: static void _foreach(Request& r, MethodParams& params) {
1.77 paf 370: Temp_hash_value<const String::Body, void*>
371: cycle_data_setter(r.classes_conf, cycle_data_name, /*any not null flag*/&r);
372:
1.63 paf 373: Foreach_info info={
374: &r,
375: ¶ms.as_string(0, "key-var name must be string"),
376: ¶ms.as_string(1, "value-var name must be string"),
377: ¶ms.as_junction(2, "body must be code"),
378: params.count()>3?params.get(3):0,
1.64 paf 379: /*vkey=*/new VString,
1.63 paf 380: false
381: };
1.57 paf 382:
383: VHash& self=GET_SELF(r, VHash);
384: HashStringValue& hash=self.hash();
1.28 paf 385: VHash_lock lock(self);
1.77 paf 386: hash.first_that<Foreach_info*>(one_foreach_cycle, &info);
1.26 paf 387: }
388:
1.1 paf 389: // constructor
390:
1.57 paf 391: MHash::MHash(): Methoded("hash")
1.39 paf 392: {
1.21 parser 393: // ^hash::create[[copy_from]]
1.57 paf 394: add_native_method("create", Method::CT_DYNAMIC, _create_or_add, 0, 1);
1.22 parser 395: // ^hash.add[add_from]
1.57 paf 396: add_native_method("add", Method::CT_DYNAMIC, _create_or_add, 1, 1);
1.22 parser 397: // ^hash.sub[sub_from]
398: add_native_method("sub", Method::CT_DYNAMIC, _sub, 1, 1);
399: // ^a.union[b] = hash
400: add_native_method("union", Method::CT_DYNAMIC, _union, 1, 1);
401: // ^a.intersection[b] = hash
402: add_native_method("intersection", Method::CT_DYNAMIC, _intersection, 1, 1);
403: // ^a.intersects[b] = bool
404: add_native_method("intersects", Method::CT_DYNAMIC, _intersects, 1, 1);
1.25 paf 405:
406: // ^a.delete[key]
407: add_native_method("delete", Method::CT_DYNAMIC, _delete, 1, 1);
1.2 parser 408:
1.71 paf 409: // ^hash:sql[query][options hash]
1.33 paf 410: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.2 parser 411:
1.68 paf 412: // ^hash._keys[[column name]]
413: add_native_method("_keys", Method::CT_DYNAMIC, _keys, 0, 1);
1.16 parser 414:
415: // ^hash._count[]
416: add_native_method("_count", Method::CT_DYNAMIC, _count, 0, 0);
1.26 paf 417:
418: // ^hash.foreach[key;value]{code}[delim]
419: add_native_method("foreach", Method::CT_DYNAMIC, _foreach, 2+1, 2+1+1);
1.1 paf 420: }
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