Annotation of parser3/src/classes/hash.C, revision 1.74
1.1 paf 1: /** @file
2: Parser: @b hash parser class.
3:
1.65 paf 4: Copyright (c) 2001-2004 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:
1.74 ! paf 8: static const char * const IDENT_HASH_C="$Date: 2005/07/28 10:02:26 $";
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:
1.1 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 {
1.57 paf 41: const String& statement_string; const char* statement_cstr;
42: bool distinct;
43: HashStringValue& rows_hash;
44: HashStringValue* row_hash;
45: int column_index;
46: ArrayString columns;
1.67 paf 47: bool only_one_column;
48: static VBool only_one_column_value;
1.11 parser 49: public:
1.57 paf 50: Hash_sql_event_handlers(
51: const String& astatement_string, const char* astatement_cstr,
1.49 paf 52: bool adistinct,
1.57 paf 53: HashStringValue& arows_hash):
54: statement_string(astatement_string), statement_cstr(astatement_cstr),
1.49 paf 55: distinct(adistinct),
1.11 parser 56: rows_hash(arows_hash),
1.57 paf 57: row_hash(0),
1.67 paf 58: column_index(0),
59: only_one_column(false) {
1.11 parser 60: }
1.57 paf 61: bool add_column(SQL_Error& error, const char* str, size_t length) {
1.53 paf 62: try {
1.57 paf 63: columns+=new String(str, length, true);
1.53 paf 64: return false;
65: } catch(...) {
66: error=SQL_Error("exception occured in Hash_sql_event_handlers::add_column");
67: return true;
68: }
1.11 parser 69: }
1.53 paf 70: bool before_rows(SQL_Error& error) {
1.67 paf 71: if(columns.count()<1) {
72: error=SQL_Error("parser.runtime", "no columns");
1.53 paf 73: return true;
74: }
1.67 paf 75: only_one_column=columns.count()==1;
1.53 paf 76:
77: return false;
1.11 parser 78: }
1.53 paf 79: bool add_row(SQL_Error& /*error*/) {
1.11 parser 80: column_index=0;
1.53 paf 81: return false;
1.11 parser 82: }
1.57 paf 83: bool add_row_cell(SQL_Error& error, const char *ptr, size_t length) {
1.53 paf 84: try {
1.57 paf 85: String& cell=*new String;
86: if(length)
87: cell.append_know_length(ptr, length, String::L_TAINTED);
1.69 paf 88: bool duplicate=false;
89: if(only_one_column) {
90: duplicate=rows_hash.put_dont_replace(cell, &only_one_column_value); // put. existed?
91: } else if(column_index==0) {
1.57 paf 92: VHash* row_vhash=new VHash;
93: row_hash=&row_vhash->hash();
1.69 paf 94: duplicate=rows_hash.put_dont_replace(cell, row_vhash); // put. existed?
1.53 paf 95: } else
1.57 paf 96: row_hash->put(*columns[column_index], new VString(cell));
1.69 paf 97:
98: if(duplicate & !distinct) {
99: error=SQL_Error("parser.runtime", "duplicate key");
100: return true;
101: }
102:
1.53 paf 103: column_index++;
104: return false;
105: } catch(...) {
106: error=SQL_Error("exception occured in Hash_sql_event_handlers::add_row_cell");
107: return true;
108: }
1.11 parser 109: }
110:
111: };
1.67 paf 112: VBool Hash_sql_event_handlers::only_one_column_value(true);
113:
1.11 parser 114: #endif
115:
1.57 paf 116: static void copy_all_overwrite_to(
117: HashStringValue::key_type key,
118: HashStringValue::value_type value,
119: HashStringValue* dest) {
120: dest->put(key, value);
121: }
122: static void _create_or_add(Request& r, MethodParams& params) {
123: if(params.count()) {
1.66 paf 124: Value& vsrc=params.as_no_junction(0, "param must be hash");
125: if(HashStringValue* src=vsrc.get_hash()) {
1.72 paf 126: VHash& self=GET_SELF(r, VHash);
127: HashStringValue* self_hash=&(self.hash());
128: if(src==self_hash) // same: doing nothing
1.66 paf 129: return;
1.72 paf 130: src->for_each(copy_all_overwrite_to, self_hash);
131:
132: if(VHash* vhash_src=static_cast<VHash*>(vsrc.as(VHASH_TYPE, false)))
133: self.set_default(vhash_src->get_default());
1.66 paf 134: }
1.20 parser 135: }
136: }
1.22 parser 137:
1.57 paf 138: static void remove_key_from(
139: HashStringValue::key_type key,
140: HashStringValue::value_type /*value*/,
141: HashStringValue* dest) {
142: dest->remove(key);
143: }
144: static void _sub(Request& r, MethodParams& params) {
1.66 paf 145: Value& vsrc=params.as_no_junction(0, "param must be hash");
146: if(HashStringValue* src=vsrc.get_hash()) {
147: HashStringValue* self=&(GET_SELF(r, VHash).hash());
148: if(src==self) { // same: clearing
149: self->clear();
150: return;
151: }
152: src->for_each(remove_key_from, self);
153: }
1.57 paf 154: }
155:
156: static void copy_all_dontoverwrite_to(
157: HashStringValue::key_type key,
158: HashStringValue::value_type value,
159: HashStringValue* dest) {
160: dest->put_dont_replace(key, value);
1.22 parser 161: }
1.57 paf 162: static void _union(Request& r, MethodParams& params) {
1.22 parser 163: // dest = copy of self
1.57 paf 164: Value& result=*new VHash(GET_SELF(r, VHash).hash());
1.22 parser 165: // dest += b
1.66 paf 166: Value& vsrc=params.as_no_junction(0, "param must be hash");
167: if(HashStringValue* src=vsrc.get_hash())
168: src->for_each(copy_all_dontoverwrite_to, result.get_hash());
1.22 parser 169:
170: // return result
171: r.write_no_lang(result);
172: }
173:
174: #ifndef DOXYGEN
175: struct Copy_intersection_to_info {
1.57 paf 176: HashStringValue* b;
177: HashStringValue* dest;
1.22 parser 178: };
179: #endif
1.57 paf 180: static void copy_intersection_to(
181: HashStringValue::key_type key,
182: HashStringValue::value_type value,
183: Copy_intersection_to_info *info) {
184: if(info->b->get(key))
185: info->dest->put_dont_replace(key, value);
1.22 parser 186: }
1.57 paf 187: static void _intersection(Request& r, MethodParams& params) {
188: Value& result=*new VHash;
1.22 parser 189: // dest += b
1.57 paf 190: Value& vb=params.as_no_junction(0, "param must be hash");
191: if(HashStringValue* b=vb.get_hash()) {
192: Copy_intersection_to_info info={b, result.get_hash()};
193: GET_SELF(r, VHash).hash().for_each(copy_intersection_to, &info);
1.22 parser 194: }
195:
196: // return result
1.57 paf 197: r.write_no_lang(result);
1.22 parser 198: }
199:
1.57 paf 200: static bool intersects(
201: HashStringValue::key_type key,
202: HashStringValue::value_type /*value*/,
203: HashStringValue* b) {
204: return b->get(key)!=0;
1.22 parser 205: }
206:
1.57 paf 207: static void _intersects(Request& r, MethodParams& params) {
208: bool result=false;
209:
210: Value& vb=params.as_no_junction(0, "param must be hash");
211: if(HashStringValue* b=vb.get_hash())
212: result=GET_SELF(r, VHash).hash().first_that(intersects, b)!=0;
1.22 parser 213:
214: // return result
1.57 paf 215: r.write_no_lang(*new VBool(result));
1.22 parser 216: }
217:
218:
1.71 paf 219: extern String sql_bind_name;
1.57 paf 220: extern String sql_limit_name;
221: extern String sql_offset_name;
222: extern String sql_default_name;
223: extern String sql_distinct_name;
1.71 paf 224: extern int marshal_binds(HashStringValue& hash, SQL_Driver::Placeholder*& placeholders);
225: extern void unmarshal_bind_updates(HashStringValue& hash, int placeholder_count, SQL_Driver::Placeholder* placeholders);
226:
1.57 paf 227: static void _sql(Request& r, MethodParams& params) {
228: Value& statement=params.as_junction(0, "statement must be code");
1.2 parser 229:
1.71 paf 230: HashStringValue* bind=0;
1.2 parser 231: ulong limit=0;
1.33 paf 232: ulong offset=0;
1.49 paf 233: bool distinct=false;
1.57 paf 234: if(params.count()>1) {
235: Value& voptions=params.as_no_junction(1, "options must be hash, not code");
1.43 paf 236: if(!voptions.is_string())
1.57 paf 237: if(HashStringValue* options=voptions.get_hash()) {
1.49 paf 238: int valid_options=0;
1.71 paf 239: if(Value* vbind=options->get(sql_bind_name)) {
240: valid_options++;
241: bind=vbind->get_hash();
242: }
1.57 paf 243: if(Value* vlimit=options->get(sql_limit_name)) {
1.49 paf 244: valid_options++;
1.37 paf 245: limit=(ulong)r.process_to_value(*vlimit).as_double();
1.49 paf 246: }
1.57 paf 247: if(Value* voffset=options->get(sql_offset_name)) {
1.49 paf 248: valid_options++;
1.37 paf 249: offset=(ulong)r.process_to_value(*voffset).as_double();
1.49 paf 250: }
1.57 paf 251: if(Value* vdistinct=options->get(sql_distinct_name)) {
1.49 paf 252: valid_options++;
253: distinct=r.process_to_value(*vdistinct).as_bool();
254: }
1.57 paf 255: if(valid_options!=options->count())
1.49 paf 256: throw Exception("parser.runtime",
1.57 paf 257: 0,
1.49 paf 258: "called with invalid option");
1.33 paf 259: } else
1.36 paf 260: throw Exception("parser.runtime",
1.57 paf 261: 0,
1.33 paf 262: "options must be hash");
1.2 parser 263: }
264:
1.71 paf 265: SQL_Driver::Placeholder* placeholders=0;
266: uint placeholders_count=0;
267: if(bind)
268: placeholders_count=marshal_binds(*bind, placeholders);
269:
1.57 paf 270: Temp_lang temp_lang(r, String::L_SQL);
1.37 paf 271: const String& statement_string=r.process_to_string(statement);
1.57 paf 272: const char* statement_cstr=
273: statement_string.cstr(String::L_UNSPECIFIED, r.connection());
274: HashStringValue& hash=GET_SELF(r, VHash).hash();
1.11 parser 275: hash.clear();
1.57 paf 276: Hash_sql_event_handlers handlers(
1.49 paf 277: statement_string, statement_cstr,
278: distinct,
279: hash);
1.57 paf 280: r.connection()->query(
1.70 paf 281: statement_cstr,
1.73 paf 282: placeholders_count, placeholders,
1.70 paf 283: offset, limit,
1.45 paf 284: handlers,
285: statement_string);
1.71 paf 286:
287: if(bind)
288: unmarshal_bind_updates(*bind, placeholders_count, placeholders);
1.2 parser 289: }
290:
1.57 paf 291: static void keys_collector(
292: HashStringValue::key_type key,
1.61 paf 293: HashStringValue::value_type,
1.57 paf 294: Table *table) {
295: Table::element_type row(new ArrayString);
296: *row+=new String(key, String::L_TAINTED);
297: *table+=row;
1.9 parser 298: }
1.68 paf 299: static void _keys(Request& r, MethodParams& params) {
300: const String* keys_column_name;
301: if(params.count()>0)
302: keys_column_name=¶ms.as_string(0, "column name must be string");
303: else
304: keys_column_name=new String("key");
305:
1.57 paf 306: Table::columns_type columns(new ArrayString);
1.68 paf 307: *columns+=keys_column_name;
1.57 paf 308: Table* table=new Table(columns);
1.9 parser 309:
1.57 paf 310: GET_SELF(r, VHash).hash().for_each(keys_collector, table);
1.9 parser 311:
1.57 paf 312: r.write_no_lang(*new VTable(table));
1.9 parser 313: }
314:
1.57 paf 315: static void _count(Request& r, MethodParams&) {
316: r.write_no_lang(*new VInt(GET_SELF(r, VHash).hash().count()));
1.16 parser 317: }
318:
1.57 paf 319: static void _delete(Request& r, MethodParams& params) {
1.25 paf 320:
1.57 paf 321: GET_SELF(r, VHash).hash().remove(params.as_string(0, "key must be string"));
1.25 paf 322: }
323:
1.26 paf 324: #ifndef DOXYGEN
1.59 paf 325: struct Foreach_info {
1.26 paf 326: Request *r;
327: const String* key_var_name;
328: const String* value_var_name;
1.57 paf 329: Value* body_code;
330: Value* delim_maybe_code;
1.26 paf 331:
1.57 paf 332: VString* vkey;
1.26 paf 333: bool need_delim;
334: };
335: #endif
1.57 paf 336: static void one_foreach_cycle(
337: HashStringValue::key_type akey,
338: HashStringValue::value_type avalue,
1.59 paf 339: Foreach_info *info) {
1.57 paf 340: info->vkey->set_string(*new String(akey, String::L_TAINTED));
341: Value& ncontext=*info->r->get_method_frame()->caller();
1.74 ! paf 342: ncontext.put_element(ncontext, *info->key_var_name, info->vkey, false);
! 343: ncontext.put_element(ncontext, *info->value_var_name, avalue, false);
1.57 paf 344:
345: StringOrValue sv_processed=info->r->process(*info->body_code);
346: const String* s_processed=sv_processed.get_string();
347: if(info->delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
348: if(info->need_delim) // need delim & iteration produced string?
349: info->r->write_pass_lang(info->r->process(*info->delim_maybe_code));
350: info->need_delim=true;
1.26 paf 351: }
1.57 paf 352: info->r->write_pass_lang(sv_processed);
1.26 paf 353: }
1.57 paf 354: static void _foreach(Request& r, MethodParams& params) {
1.63 paf 355: Foreach_info info={
356: &r,
357: ¶ms.as_string(0, "key-var name must be string"),
358: ¶ms.as_string(1, "value-var name must be string"),
359: ¶ms.as_junction(2, "body must be code"),
360: params.count()>3?params.get(3):0,
1.64 paf 361: /*vkey=*/new VString,
1.63 paf 362: false
363: };
1.57 paf 364:
365: VHash& self=GET_SELF(r, VHash);
366: HashStringValue& hash=self.hash();
1.28 paf 367: VHash_lock lock(self);
368: hash.for_each(one_foreach_cycle, &info);
1.26 paf 369: }
370:
1.1 paf 371: // constructor
372:
1.57 paf 373: MHash::MHash(): Methoded("hash")
1.39 paf 374: {
1.21 parser 375: // ^hash::create[[copy_from]]
1.57 paf 376: add_native_method("create", Method::CT_DYNAMIC, _create_or_add, 0, 1);
1.22 parser 377: // ^hash.add[add_from]
1.57 paf 378: add_native_method("add", Method::CT_DYNAMIC, _create_or_add, 1, 1);
1.22 parser 379: // ^hash.sub[sub_from]
380: add_native_method("sub", Method::CT_DYNAMIC, _sub, 1, 1);
381: // ^a.union[b] = hash
382: add_native_method("union", Method::CT_DYNAMIC, _union, 1, 1);
383: // ^a.intersection[b] = hash
384: add_native_method("intersection", Method::CT_DYNAMIC, _intersection, 1, 1);
385: // ^a.intersects[b] = bool
386: add_native_method("intersects", Method::CT_DYNAMIC, _intersects, 1, 1);
1.25 paf 387:
388: // ^a.delete[key]
389: add_native_method("delete", Method::CT_DYNAMIC, _delete, 1, 1);
1.2 parser 390:
1.71 paf 391: // ^hash:sql[query][options hash]
1.33 paf 392: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.2 parser 393:
1.68 paf 394: // ^hash._keys[[column name]]
395: add_native_method("_keys", Method::CT_DYNAMIC, _keys, 0, 1);
1.16 parser 396:
397: // ^hash._count[]
398: add_native_method("_count", Method::CT_DYNAMIC, _count, 0, 0);
1.26 paf 399:
400: // ^hash.foreach[key;value]{code}[delim]
401: add_native_method("foreach", Method::CT_DYNAMIC, _foreach, 2+1, 2+1+1);
1.1 paf 402: }
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