Annotation of parser3/src/classes/hash.C, revision 1.29
1.1 paf 1: /** @file
2: Parser: @b hash parser class.
3:
4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.19 parser 5: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.1 paf 6:
1.29 ! paf 7: $Id: hash.C,v 1.28 2001/11/01 15:45:27 paf Exp $
1.1 paf 8: */
9:
10: #include "classes.h"
11: #include "pa_request.h"
12: #include "pa_vhash.h"
1.6 parser 13: #include "pa_vvoid.h"
1.2 parser 14: #include "pa_sql_connection.h"
1.9 parser 15: #include "pa_vtable.h"
1.22 parser 16: #include "pa_vbool.h"
1.26 paf 17: #include "pa_vmethod_frame.h"
1.2 parser 18:
19: // defines
20:
21: #define HASH_CLASS_NAME "hash"
1.1 paf 22:
23: // class
24:
25: class MHash : public Methoded {
1.2 parser 26: public: // VStateless_class
27: Value *create_new_value(Pool& pool) { return new(pool) VHash(pool); }
28:
1.1 paf 29: public:
30: MHash(Pool& pool);
31: public: // Methoded
1.2 parser 32: bool used_directly() { return true; }
1.1 paf 33: };
34:
35: // methods
36:
1.11 parser 37: #ifndef DOXYGEN
38: class Hash_sql_event_handlers : public SQL_Driver_query_event_handlers {
39: public:
40: Hash_sql_event_handlers(Pool& apool, const String& amethod_name,
41: const String& astatement_string, const char *astatement_cstr,
42: Hash& arows_hash) :
43: pool(apool),
44: method_name(amethod_name),
45: statement_string(astatement_string),
46: statement_cstr(astatement_cstr),
47: rows_hash(arows_hash),
48: columns(pool),
49: row_index(0) {
50: }
51: void add_column(void *ptr, size_t size) {
52: String *column=new(pool) String(pool);
53: column->APPEND_TAINTED(
54: (const char *)ptr, size,
55: statement_cstr, 0);
56: columns+=column;
57: }
58: void before_rows() {
59: if(columns.size()<=1)
1.23 parser 60: throw Exception(0, 0,
1.11 parser 61: &method_name,
62: "column count must be more than 1 to create a hash");
63: }
64: void add_row() {
65: column_index=0;
66: }
67: void add_row_cell(void *ptr, size_t size) {
68: String *cell=new(pool) String(pool);
69: if(size)
70: cell->APPEND_TAINTED(
71: (const char *)ptr, size,
72: statement_cstr, row_index++);
73: if(column_index==0) {
74: VHash *row_vhash=new(pool) VHash(pool);
1.24 parser 75: row_hash=row_vhash->get_hash(0);
1.11 parser 76: rows_hash.put(*cell, row_vhash);
77: } else
78: row_hash->put(*columns.get_string(column_index), new(pool) VString(*cell));
1.12 parser 79: column_index++;
1.11 parser 80: }
81:
82: private:
83: Pool& pool;
84: const String& method_name;
85: const String& statement_string; const char *statement_cstr;
86: Hash& rows_hash;
87: Hash *row_hash;
88: int column_index;
89: Array columns;
90: int row_index;
91: };
92: #endif
93:
1.22 parser 94: static void copy_all_overwrite_to(const Hash::Key& key, Hash::Val *value, void *info) {
1.20 parser 95: Hash& dest=*static_cast<Hash *>(info);
96: dest.put(key, value);
97: }
98:
1.22 parser 99: static void _create_or_add(Request& r, const String& method_name, MethodParams *params) {
1.20 parser 100: Pool& pool=r.pool();
101:
102: if(params->size()) {
1.22 parser 103: Value& vb=params->as_no_junction(0, "param must be hash");
1.24 parser 104: if(Hash *b=vb.get_hash(&method_name))
1.28 paf 105: b->for_each(copy_all_overwrite_to, &static_cast<VHash *>(r.self)->hash(&method_name));
1.20 parser 106: }
107: }
108:
1.22 parser 109: static void remove_key_from(const Hash::Key& key, Hash::Val *value, void *info) {
110: Hash& dest=*static_cast<Hash *>(info);
1.25 paf 111: dest.remove(key);
1.22 parser 112: }
113:
114: static void _sub(Request& r, const String& method_name, MethodParams *params) {
115: Pool& pool=r.pool();
116:
117: Value& vb=params->as_no_junction(0, "param must be hash");
1.24 parser 118: if(Hash *b=vb.get_hash(&method_name))
1.28 paf 119: b->for_each(remove_key_from, &static_cast<VHash *>(r.self)->hash(&method_name));
1.22 parser 120: }
121:
122: static void copy_all_dontoverwrite_to(const Hash::Key& key, Hash::Val *value, void *info) {
123: Hash& dest=*static_cast<Hash *>(info);
124: dest.put_dont_replace(key, value);
125: }
126:
127: static void _union(Request& r, const String& method_name, MethodParams *params) {
128: Pool& pool=r.pool();
129:
130: // dest = copy of self
1.28 paf 131: Hash& dest=*new(pool) Hash(static_cast<VHash *>(r.self)->hash(&method_name));
1.22 parser 132: // dest += b
133: Value& vb=params->as_no_junction(0, "param must be hash");
1.24 parser 134: if(Hash *b=vb.get_hash(&method_name))
1.22 parser 135: b->for_each(copy_all_dontoverwrite_to, &dest);
136:
137: // return result
138: Value& result=*new(pool) VHash(pool, dest);
139: result.set_name(method_name);
140: r.write_no_lang(result);
141: }
142:
143: #ifndef DOXYGEN
144: struct Copy_intersection_to_info {
145: Hash *b;
146: Hash *dest;
147: };
148: #endif
149:
150: static void copy_intersection_to(const Hash::Key& key, Hash::Val *value, void *info) {
151: Copy_intersection_to_info& i=*static_cast<Copy_intersection_to_info *>(info);
152:
153: if(i.b->get(key))
154: i.dest->put_dont_replace(key, value);
155: }
156:
157: static void _intersection(Request& r, const String& method_name, MethodParams *params) {
158: Pool& pool=r.pool();
159:
160: // dest = copy of self
161: Hash& dest=*new(pool) Hash(pool);
162: // dest += b
163: Value& vb=params->as_no_junction(0, "param must be hash");
1.24 parser 164: if(Hash *b=vb.get_hash(&method_name)) {
1.22 parser 165: Copy_intersection_to_info info={
166: b,
167: &dest
168: };
1.28 paf 169: static_cast<VHash *>(r.self)->hash(&method_name).for_each(copy_intersection_to, &info);
1.22 parser 170: }
171:
172: // return result
173: Value& result=*new(pool) VHash(pool, dest);
174: result.set_name(method_name);
175: r.write_no_lang(result);
176: }
177:
178: static void *intersects(const Hash::Key& key, Hash::Val *value, void *info) {
179: return static_cast<Hash *>(info)->get(key);
180: }
181:
182: static void _intersects(Request& r, const String& method_name, MethodParams *params) {
183: Pool& pool=r.pool();
184:
185: bool yes=false;
186:
187: // dest = copy of self
188: Hash& dest=*new(pool) Hash(pool);
189: // dest += b
190: Value& vb=params->as_no_junction(0, "param must be hash");
1.24 parser 191: if(Hash *b=vb.get_hash(&method_name))
1.28 paf 192: yes=static_cast<VHash *>(r.self)->hash(&method_name).first_that(intersects, b)!=0;
1.22 parser 193:
194: // return result
195: Value& result=*new(pool) VBool(pool, yes);
196: result.set_name(method_name);
197: r.write_no_lang(result);
198: }
199:
200:
1.2 parser 201: static void _sql(Request& r, const String& method_name, MethodParams *params) {
202: Pool& pool=r.pool();
203:
204: if(!r.connection)
1.23 parser 205: throw Exception(0, 0,
1.2 parser 206: &method_name,
207: "without connect");
208:
1.10 parser 209: Value& statement=params->as_junction(0, "statement must be code");
1.2 parser 210:
211: ulong limit=0;
212: if(params->size()>1) {
1.10 parser 213: Value& limit_code=params->as_junction(1, "limit must be expression");
1.2 parser 214: limit=(uint)r.process(limit_code).as_double();
215: }
216:
217: ulong offset=0;
218: if(params->size()>2) {
1.10 parser 219: Value& offset_code=params->as_junction(2, "offset must be expression");
1.2 parser 220: offset=(ulong)r.process(offset_code).as_double();
221: }
222:
223: Temp_lang temp_lang(r, String::UL_SQL);
224: const String& statement_string=r.process(statement).as_string();
225: const char *statement_cstr=
226: statement_string.cstr(String::UL_UNSPECIFIED, r.connection);
1.28 paf 227: Hash& hash=static_cast<VHash *>(r.self)->hash(&method_name);
1.11 parser 228: hash.clear();
229: Hash_sql_event_handlers handlers(pool, method_name,
230: statement_string, statement_cstr, hash);
1.23 parser 231:
232: r.connection->query(
233: statement_cstr, offset, limit,
234: handlers);
1.2 parser 235: }
236:
1.9 parser 237: static void keys_collector(const Hash::Key& key, Hash::Val *value, void *info) {
238: Table& table=*static_cast<Table *>(info);
239: Pool& pool=table.pool();
240:
241: Array& row=*new(pool) Array(pool);
242: row+=&key;
243: table+=&row;
244: }
245: static void _keys(Request& r, const String& method_name, MethodParams *) {
246: Pool& pool=r.pool();
247:
248: Array& columns=*new(pool) Array(pool);
249: columns+=new(pool) String(pool, "key");
250: Table& table=*new(pool) Table(pool, &method_name, &columns);
251:
1.28 paf 252: static_cast<VHash *>(r.self)->hash(&method_name).for_each(keys_collector, &table);
1.9 parser 253:
254: VTable& result=*new(pool) VTable(pool, &table);
255: result.set_name(method_name);
256: r.write_no_lang(result);
257: }
258:
1.16 parser 259: static void _count(Request& r, const String& method_name, MethodParams *) {
260: Pool& pool=r.pool();
261:
1.28 paf 262: Value& result=*new(pool) VInt(pool, static_cast<VHash *>(r.self)->hash(&method_name).size());
1.22 parser 263: result.set_name(method_name);
264: r.write_no_lang(result);
1.16 parser 265: }
266:
1.25 paf 267: static void _delete(Request& r, const String& method_name, MethodParams *params) {
268: Pool& pool=r.pool();
269:
1.28 paf 270: static_cast<VHash *>(r.self)->hash(&method_name).remove(params->as_string(0, "key must be string"));
1.25 paf 271: }
272:
1.26 paf 273: #ifndef DOXYGEN
274: struct Foreach_info {
275: Request *r;
276: const String* key_var_name;
277: const String* value_var_name;
278: Value *body_code;
279: Value *delim_maybe_code;
280:
281: VString *vkey;
282: bool need_delim;
283: };
284: #endif
285:
286: static void one_foreach_cycle(const Hash::Key& akey, Hash::Val *avalue,
287: void *info) {
288: Foreach_info& i=*static_cast<Foreach_info *>(info);
289:
290: i.vkey->set_string(akey);
1.29 ! paf 291: i.r->root->put_element(*i.key_var_name, i.vkey);
! 292: i.r->root->put_element(*i.value_var_name, static_cast<Value *>(avalue));
1.26 paf 293:
294: Value& processed_body=i.r->process(*i.body_code);
295: if(i.delim_maybe_code) { // delimiter set?
296: const String *string=processed_body.get_string();
297: if(i.need_delim && string && string->size()) // need delim & iteration produced string?
298: i.r->write_pass_lang(i.r->process(*i.delim_maybe_code));
299: i.need_delim=true;
300: }
301: i.r->write_pass_lang(processed_body);
302: }
303: static void _foreach(Request& r, const String& method_name, MethodParams *params) {
304: Pool& pool=r.pool();
305: const String& key_var_name=params->as_string(0, "key-var name must be string");
306: const String& value_var_name=params->as_string(1, "value-var name must be string");
307: Value& body_code=params->as_junction(2, "body must be code");
308: Value *delim_maybe_code=params->size()>3?¶ms->get(3):0;
309:
310: Foreach_info info={
311: &r,
312: &key_var_name, &value_var_name,
313: &body_code,
314: delim_maybe_code,
315:
316: new(pool) VString(pool),
317: false
318: };
1.28 paf 319: VHash& self=*static_cast<VHash *>(r.self);
320: Hash& hash=self.hash(&method_name);
321: VHash_lock lock(self);
322: hash.for_each(one_foreach_cycle, &info);
1.26 paf 323: }
324:
1.1 paf 325: // constructor
326:
327: MHash::MHash(Pool& apool) : Methoded(apool) {
1.2 parser 328: set_name(*NEW String(pool(), HASH_CLASS_NAME));
1.20 parser 329:
1.21 parser 330: // ^hash::create[[copy_from]]
1.22 parser 331: add_native_method("create", Method::CT_DYNAMIC, _create_or_add, 0, 1);
332: // ^hash.add[add_from]
333: add_native_method("add", Method::CT_DYNAMIC, _create_or_add, 1, 1);
334: // ^hash.sub[sub_from]
335: add_native_method("sub", Method::CT_DYNAMIC, _sub, 1, 1);
336: // ^a.union[b] = hash
337: add_native_method("union", Method::CT_DYNAMIC, _union, 1, 1);
338: // ^a.intersection[b] = hash
339: add_native_method("intersection", Method::CT_DYNAMIC, _intersection, 1, 1);
340: // ^a.intersects[b] = bool
341: add_native_method("intersects", Method::CT_DYNAMIC, _intersects, 1, 1);
1.25 paf 342:
343: // ^a.delete[key]
344: add_native_method("delete", Method::CT_DYNAMIC, _delete, 1, 1);
1.2 parser 345:
346: // ^hash:sql[query][(count[;offset])]
347: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 3);
348:
1.14 parser 349: // ^hash._keys[]
1.13 parser 350: add_native_method("_keys", Method::CT_DYNAMIC, _keys, 0, 0);
1.16 parser 351:
352: // ^hash._count[]
353: add_native_method("_count", Method::CT_DYNAMIC, _count, 0, 0);
1.26 paf 354:
355: // ^hash.foreach[key;value]{code}[delim]
356: add_native_method("foreach", Method::CT_DYNAMIC, _foreach, 2+1, 2+1+1);
1.1 paf 357: }
358:
359: // global variable
360:
361: Methoded *hash_base_class;
362:
363: // creator
364:
365: Methoded *MHash_create(Pool& pool) {
366: return hash_base_class=new(pool) MHash(pool);
367: }
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