Annotation of parser3/src/classes/table.C, revision 1.153
1.20 paf 1: /** @file
1.47 paf 2: Parser: @b table parser class.
1.20 paf 3:
1.143 paf 4: Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
1.144 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.20 paf 6:
1.153 ! paf 7: $Id: table.C,v 1.152 2002/04/25 09:39:45 paf Exp $
1.1 paf 8: */
9:
1.105 parser 10: #include "classes.h"
1.16 paf 11: #include "pa_common.h"
1.1 paf 12: #include "pa_request.h"
13: #include "pa_vtable.h"
1.6 paf 14: #include "pa_vint.h"
1.51 paf 15: #include "pa_sql_connection.h"
1.72 paf 16: #include "pa_vbool.h"
1.1 paf 17:
1.66 paf 18: // class
19:
20: class MTable : public Methoded {
21: public: // VStateless_class
22: Value *create_new_value(Pool& pool) { return new(pool) VTable(pool); }
23:
24: public:
25: MTable(Pool& pool);
1.70 paf 26:
27: public: // Methoded
1.66 paf 28: bool used_directly() { return true; }
29: };
1.1 paf 30:
31: // methods
1.66 paf 32:
1.142 paf 33: static void _create(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 34: Pool& pool=r.pool();
1.142 paf 35: // clone?
36: if(params->size()==1)
37: if(const Table *source=params->get(0).get_table()) {
38: static_cast<VTable *>(r.self)->set_table(*new(pool) Table(*source));
39: return;
40: }
41:
1.1 paf 42: // data is last parameter
1.45 paf 43: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.134 paf 44: const String& data=
1.147 paf 45: r.process_to_string(params->as_junction(params->size()-1, "body must be code"));
1.44 paf 46:
47: size_t pos_after=0;
48: // parse columns
49: Array *columns;
50: if(params->size()==2) {
51: columns=0;
1.21 paf 52: } else {
1.44 paf 53: columns=new(pool) Array(pool);
54:
55: Array head(pool);
1.137 paf 56: data.split(head, &pos_after, "\n", 1, String::UL_AS_IS, 1);
1.44 paf 57: if(head.size())
1.137 paf 58: head.get_string(0)->split(*columns, 0, "\t", 1, String::UL_AS_IS);
1.44 paf 59: }
60:
61: Table& table=*new(pool) Table(pool, &method_name, columns);
62: // parse cells
63: Array rows(pool);
1.137 paf 64: data.split(rows, &pos_after, "\n", 1, String::UL_AS_IS);
1.98 parser 65: Array_iter i(rows);
66: while(i.has_next()) {
1.44 paf 67: Array& row=*new(pool) Array(pool);
1.98 parser 68: const String& string=*i.next_string();
1.118 parser 69: // remove comment lines
70: if(!string.size())
1.44 paf 71: continue;
72:
1.137 paf 73: string.split(row, 0, "\t", 1, String::UL_AS_IS);
1.44 paf 74: table+=&row;
1.17 paf 75: }
1.1 paf 76:
1.44 paf 77: // replace any previous table value
78: static_cast<VTable *>(r.self)->set_table(table);
79: }
80:
1.61 paf 81: static void _load(Request& r, const String& method_name, MethodParams *params) {
1.44 paf 82: Pool& pool=r.pool();
83: // filename is last parameter
1.125 parser 84: Value& vfile_name=params->as_no_junction(params->size()-1,
1.61 paf 85: "file name must not be code");
1.44 paf 86:
87: // loading text
1.125 parser 88: char *data=file_read_text(pool, r.absolute(vfile_name.as_string()));
1.44 paf 89:
1.1 paf 90: // parse columns
91: Array *columns;
92: #ifndef NO_STRING_ORIGIN
93: const Origin& origin=method_name.origin();
1.2 paf 94: const char *file=origin.file;
1.1 paf 95: uint line=origin.line;
96: #endif
97: if(params->size()==2) {
1.139 paf 98: columns=0; // nameless
1.1 paf 99: } else {
100: columns=new(pool) Array(pool);
101:
1.139 paf 102: while(char *row_chars=getrow(&data)) {
103: // remove empty&comment lines
104: if(!*row_chars || *row_chars == '#')
105: continue;
1.1 paf 106: do {
107: String *name=new(pool) String(pool);
1.45 paf 108: name->APPEND_TAINTED(lsplit(&row_chars, '\t'), 0, file, line++);
1.1 paf 109: *columns+=name;
110: } while(row_chars);
1.139 paf 111:
112: break;
113: }
1.1 paf 114: }
115:
116: // parse cells
1.27 paf 117: Table& table=*new(pool) Table(pool, &method_name, columns);
1.1 paf 118: char *row_chars;
119: while(row_chars=getrow(&data)) {
1.118 parser 120: // remove empty&comment lines
121: if(!*row_chars || *row_chars == '#')
1.28 paf 122: continue;
1.1 paf 123: Array *row=new(pool) Array(pool);
124: while(char *cell_chars=lsplit(&row_chars, '\t')) {
125: String *cell=new(pool) String(pool);
1.44 paf 126: cell->APPEND_TAINTED(cell_chars, 0, file, line);
1.1 paf 127: *row+=cell;
128: }
1.107 parser 129: #ifndef NO_STRING_ORIGIN
1.1 paf 130: line++;
1.107 parser 131: #endif
1.1 paf 132: table+=row;
133: };
134:
135: // replace any previous table value
1.18 paf 136: static_cast<VTable *>(r.self)->set_table(table);
1.1 paf 137: }
1.2 paf 138:
1.146 paf 139: /// @todo "x\nx" "xxx""xx"
1.61 paf 140: static void _save(Request& r, const String& method_name, MethodParams *params) {
1.22 paf 141: Pool& pool=r.pool();
1.125 parser 142: Value& vfile_name=params->as_no_junction(params->size()-1,
1.61 paf 143: "file name must not be code");
1.22 paf 144:
1.31 paf 145: Table& table=static_cast<VTable *>(r.self)->table();
146:
1.129 paf 147: bool do_append=false;
1.31 paf 148: String sdata(pool);
1.129 paf 149: if(params->size()==1) { // named output
1.31 paf 150: // write out names line
151: if(table.columns()) { // named table
1.98 parser 152: Array_iter i(*table.columns());
153: while(i.has_next()) {
154: sdata.append(*i.next_string(), //*static_cast<String *>(table.columns()->quick_get(column)),
155: String::UL_TABLE);
156: if(i.has_next())
1.31 paf 157: sdata.APPEND_CONST("\t");
158: }
159: } else { // nameless table
1.98 parser 160: if(int lsize=table.size()?static_cast<Array *>(table.get(0))->size():0)
1.31 paf 161: for(int column=0; column<lsize; column++) {
1.106 parser 162: char *cindex_tab=(char *)pool.malloc(MAX_NUMBER);
1.31 paf 163: snprintf(cindex_tab, MAX_NUMBER, "%d\t", column);
164: sdata.APPEND_CONST(cindex_tab);
165: }
166: else
167: sdata.APPEND_CONST("empty nameless table");
168: }
169: sdata.APPEND_CONST("\n");
1.129 paf 170: } else { // mode specified
171: const String& mode=params->as_string(0, "mode must be string");
172: if(mode=="append")
173: do_append=true;
174: else if(mode=="nameless")
175: /*ok, already skipped names output*/;
176: else
1.146 paf 177: throw Exception("parser.runtime",
1.129 paf 178: &mode,
179: "unknown mode, must be 'append'");
180:
1.31 paf 181: }
182: // data lines
1.98 parser 183: Array_iter i(table);
184: while(i.has_next()) {
185: Array_iter c(*static_cast<Array *>(i.next()));
186: while(c.has_next()) {
1.153 ! paf 187: if(const String *s=c.next_string())
! 188: sdata.append(*s,
! 189: String::UL_TABLE);
1.98 parser 190: if(c.has_next())
1.31 paf 191: sdata.APPEND_CONST("\t");
192: }
193: sdata.APPEND_CONST("\n");
194: }
195:
196: // write
1.141 paf 197: file_write(r.absolute(vfile_name.as_string()),
1.129 paf 198: sdata.cstr(), sdata.size(), true, do_append);
1.22 paf 199: }
200:
1.93 parser 201: static void _count(Request& r, const String& method_name, MethodParams *) {
1.6 paf 202: Pool& pool=r.pool();
1.151 paf 203: int result=static_cast<VTable *>(r.self)->table().size();
204: r.write_no_lang(*new(pool) VInt(pool, result));
1.6 paf 205: }
206:
1.61 paf 207: static void _line(Request& r, const String& method_name, MethodParams *) {
1.6 paf 208: Pool& pool=r.pool();
1.151 paf 209: int result=1+static_cast<VTable *>(r.self)->table().current();
210: r.write_no_lang(*new(pool) VInt(pool, result));
1.6 paf 211: }
212:
1.61 paf 213: static void _offset(Request& r, const String& method_name, MethodParams *params) {
1.6 paf 214: Pool& pool=r.pool();
1.18 paf 215: Table& table=static_cast<VTable *>(r.self)->table();
1.74 paf 216: if(params->size()) {
1.133 paf 217: bool absolute=false;
218: if(params->size()>1) {
219: const String& whence=params->as_string(0, "whence must be string");
220: if(whence=="cur")
1.134 paf 221: absolute=false;
1.133 paf 222: else if(whence=="set")
1.134 paf 223: absolute=true;
1.133 paf 224: else
1.146 paf 225: throw Exception("parser.runtime",
1.134 paf 226: &whence,
227: "is invalid whence, valid are 'cur' or 'set'");
228: }
1.133 paf 229:
230: Value& offset_expr=params->as_junction(params->size()-1, "offset must be expression");
1.147 paf 231: table.offset(absolute, r.process_to_value(offset_expr).as_int());
1.151 paf 232: } else
233: r.write_no_lang(*new(pool) VInt(pool, table.current()));
1.6 paf 234: }
235:
1.61 paf 236: static void _menu(Request& r, const String& method_name, MethodParams *params) {
1.90 parser 237: Value& body_code=params->as_junction(0, "body must be code");
1.7 paf 238:
1.122 parser 239: Value *delim_maybe_code=params->size()>1?¶ms->get(1):0;
1.7 paf 240:
1.148 paf 241: Table& table=static_cast<VTable *>(r.self)->table();
1.7 paf 242: bool need_delim=false;
1.99 parser 243: int saved_current=table.current();
244: int size=table.size();
245: for(int row=0; row<size; row++) {
1.22 paf 246: table.set_current(row);
1.7 paf 247:
1.150 paf 248: StringOrValue processed_body=r.process(body_code);
1.121 parser 249: if(delim_maybe_code) { // delimiter set?
1.7 paf 250: const String *string=processed_body.get_string();
251: if(need_delim && string && string->size()) // need delim & iteration produced string?
1.150 paf 252: r.write_pass_lang(r.process(*delim_maybe_code));
1.7 paf 253: need_delim=true;
254: }
255: r.write_pass_lang(processed_body);
256: }
1.99 parser 257: table.set_current(saved_current);
1.7 paf 258: }
259:
1.110 parser 260: #ifndef DOXYGEN
1.74 paf 261: struct Row_info {
262: Table *table;
263: int key_field;
264: Array *value_fields;
265: Hash *hash;
266: };
1.110 parser 267: #endif
1.74 paf 268: static void table_row_to_hash(Array::Item *value, void *info) {
269: Array& row=*static_cast<Array *>(value);
270: Row_info& ri=*static_cast<Row_info *>(info);
271: Pool& pool=ri.table->pool();
272:
1.76 paf 273: if(ri.key_field<row.size()) {
274: VHash& result=*new(pool) VHash(pool);
1.128 parser 275: Hash& hash=*result.get_hash(0);
1.74 paf 276: for(int i=0; i<ri.value_fields->size(); i++) {
277: int value_field=ri.value_fields->get_int(i);
278: if(value_field<row.size())
279: hash.put(
1.91 parser 280: *ri.table->columns()->get_string(value_field),
1.74 paf 281: new(pool) VString(*row.get_string(value_field)));
282: }
283:
1.77 paf 284: ri.hash->put(*row.get_string(ri.key_field), &result);
1.74 paf 285: }
286: }
287: static void _hash(Request& r, const String& method_name, MethodParams *params) {
1.97 parser 288: Pool& pool=r.pool();
1.123 parser 289: Table& self_table=static_cast<VTable *>(r.self)->table();
1.97 parser 290: Value& result=*new(pool) VHash(pool);
1.152 paf 291: if(const Array *columns=self_table.columns())
292: if(columns->size()>0) {
1.90 parser 293: const String& key_field_name=params->as_no_junction(0,
1.74 paf 294: "key field name must not be code").as_string();
1.123 parser 295: int key_field=self_table.column_name2index(key_field_name, true);
296:
297: Array value_fields(pool);
298: if(params->size()>1) {
299: Value& value_fields_param=params->as_no_junction(1, "value field(s) must not be code");
300: if(value_fields_param.is_string()) {
301: value_fields+=self_table.column_name2index(value_fields_param.as_string(), true);
302: } else if(Table *value_fields_table=value_fields_param.get_table()) {
303: for(int i=0; i<value_fields_table->size(); i++) {
304: const String& value_field_name=
305: *static_cast<Array *>(value_fields_table->get(i))->get_string(0);
306: value_fields+=self_table.column_name2index(value_field_name, true);
307: }
308: } else
1.146 paf 309: throw Exception("parser.runtime",
1.123 parser 310: &method_name,
311: "value field(s) must be string or self_table"
312: );
313: } else { // by all columns, including key
1.74 paf 314: for(int i=0; i<columns->size(); i++)
1.123 parser 315: value_fields+=i;
1.74 paf 316: }
317:
318: // integers: key_field & value_fields
1.128 parser 319: Row_info row_info={&self_table, key_field, &value_fields, result.get_hash(0)};
1.123 parser 320: self_table.for_each(table_row_to_hash, &row_info);
1.74 paf 321: }
1.97 parser 322: r.write_no_lang(result);
1.74 paf 323: }
324:
1.110 parser 325: #ifndef DOXYGEN
1.78 paf 326: struct Table_seq_item {
1.34 paf 327: Array *row;
328: union {
329: char *c_str;
330: double d;
331: } value;
1.32 paf 332: };
1.110 parser 333: #endif
1.34 paf 334: static int sort_cmp_string(const void *a, const void *b) {
335: return strcmp(
1.78 paf 336: static_cast<const Table_seq_item *>(a)->value.c_str,
337: static_cast<const Table_seq_item *>(b)->value.c_str
1.34 paf 338: );
339: }
340: static int sort_cmp_double(const void *a, const void *b) {
1.78 paf 341: double va=static_cast<const Table_seq_item *>(a)->value.d;
342: double vb=static_cast<const Table_seq_item *>(b)->value.d;
1.34 paf 343: if(va<vb)
344: return -1;
345: else if(va>vb)
346: return +1;
347: else
348: return 0;
349: }
1.61 paf 350: static void _sort(Request& r, const String& method_name, MethodParams *params) {
1.101 parser 351: Pool& pool=r.pool();
1.90 parser 352: Value& key_maker=params->as_junction(0, "key-maker must be code");
1.61 paf 353:
1.122 parser 354: bool reverse=params->size()>1/*..[desc|asc|]*/?
1.103 parser 355: reverse=params->as_no_junction(1, "order must not be code").as_string()=="desc":
1.104 parser 356: false; // default=asc
1.32 paf 357:
1.101 parser 358: Table& old_table=static_cast<VTable *>(r.self)->table();
359: Table& new_table=*new(pool) Table(pool, &method_name, old_table.columns());
1.34 paf 360:
1.101 parser 361: Table_seq_item *seq=(Table_seq_item *)pool.malloc(sizeof(Table_seq_item)*old_table.size());
1.34 paf 362: int i;
363:
364: // calculate key values
365: bool key_values_are_strings=true;
1.101 parser 366: // save 'current'
367: int saved_current=old_table.current();
368: for(i=0; i<old_table.size(); i++) {
369: old_table.set_current(i);
1.32 paf 370: // calculate key value
1.101 parser 371: seq[i].row=(MethodParams *)old_table.get(i);
1.147 paf 372: Value& value=*r.process_to_value(key_maker).as_expr_result(true/*return string as-is*/);
1.34 paf 373: if(i==0) // determining key values type by first one
374: key_values_are_strings=value.is_string();
375:
376: if(key_values_are_strings)
377: seq[i].value.c_str=value.as_string().cstr();
378: else
379: seq[i].value.d=value.as_double();
1.32 paf 380: }
1.101 parser 381: // restore 'current'
382: old_table.set_current(saved_current);
1.32 paf 383: // sort keys
1.101 parser 384: _qsort(seq, old_table.size(), sizeof(Table_seq_item),
1.34 paf 385: key_values_are_strings?sort_cmp_string:sort_cmp_double);
1.32 paf 386:
1.34 paf 387: // reorder table as they require in 'seq'
1.101 parser 388: for(i=0; i<old_table.size(); i++)
389: new_table+=seq[reverse?old_table.size()-1-i:i].row;
1.32 paf 390:
1.116 parser 391: // replace any previous table value
392: static_cast<VTable *>(r.self)->set_table(new_table);
1.32 paf 393: }
394:
1.145 paf 395: static bool _locate_expression(Request& r, const String& method_name, MethodParams *params) {
396: if(params->size()>1)
1.146 paf 397: throw Exception("parser.runtime",
1.145 paf 398: &method_name,
399: "locate by expression has only one parameter - expression");
400:
401: Value& expression_code=params->as_junction(0, "must be expression");
402:
1.148 paf 403: Table& table=static_cast<VTable *>(r.self)->table();
1.145 paf 404: int saved_current=table.current();
405: int size=table.size();
406: for(int row=0; row<size; row++) {
407: table.set_current(row);
408:
1.147 paf 409: if(r.process_to_value(expression_code).as_bool())
1.145 paf 410: return true;
411: }
412: table.set_current(saved_current);
413: return false;
414: }
415: static bool _locate_name_value(Request& r, const String& method_name, MethodParams *params) {
416: if(params->size()>2)
1.146 paf 417: throw Exception("parser.runtime",
1.145 paf 418: &method_name,
419: "locate by name and value has only two parameters - name and value");
1.72 paf 420:
1.148 paf 421: Table& table=static_cast<VTable *>(r.self)->table();
1.145 paf 422: return table.locate(
1.120 parser 423: params->as_string(0, "column name must be string"),
424: params->as_string(1, "value must be string")
1.145 paf 425: );
426: }
427: static void _locate(Request& r, const String& method_name, MethodParams *params) {
428: Pool& pool=r.pool();
1.151 paf 429: bool result=params->get(0).get_junction()?
1.145 paf 430: _locate_expression(r, method_name, params) :
1.151 paf 431: _locate_name_value(r, method_name, params);
432: r.write_no_lang(*new(pool) VBool(pool, result));
1.37 paf 433: }
434:
1.61 paf 435: static void _flip(Request& r, const String& method_name, MethodParams *params) {
1.39 paf 436: Pool& pool=r.pool();
1.148 paf 437: Table& old_table=static_cast<VTable *>(r.self)->table();
1.39 paf 438: Table& new_table=*new(pool) Table(pool, &method_name, 0/*nameless*/);
439: if(old_table.size())
440: if(int old_cols=old_table.at(0).size())
441: for(int column=0; column<old_cols; column++) {
442: Array& new_row=*new(pool) Array(pool, old_table.size());
443: for(int i=0; i<old_table.size(); i++) {
444: const Array& old_row=old_table.at(i);
1.126 parser 445: new_row+=column<old_row.size()?old_row.get(column):new(pool) String(pool);
1.39 paf 446: }
447: new_table+=&new_row;
448: }
449:
1.99 parser 450: r.write_no_lang(*new(pool) VTable(pool, &new_table));
1.39 paf 451: }
452:
1.61 paf 453: static void _append(Request& r, const String& method_name, MethodParams *params) {
1.41 paf 454: Pool& pool=r.pool();
1.134 paf 455: // data
456: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.61 paf 457: const String& string=
1.147 paf 458: r.process_to_string(params->as_junction(0, "body must be code"));
1.41 paf 459:
460: // parse cells
461: Array& row=*new(pool) Array(pool);
1.137 paf 462: string.split(row, 0, "\t", 1, String::UL_AS_IS);
1.41 paf 463:
1.148 paf 464: static_cast<VTable *>(r.self)->table()+=&row;
1.41 paf 465: }
466:
1.61 paf 467: static void _join(Request& r, const String& method_name, MethodParams *params) {
1.42 paf 468: Pool& pool=r.pool();
469:
1.90 parser 470: Table *maybe_src=params->as_no_junction(0, "table ref must not be code").get_table();
1.42 paf 471: if(!maybe_src)
1.146 paf 472: throw Exception("parser.runtime",
1.91 parser 473: &method_name,
1.42 paf 474: "source is not a table");
475:
476: Table& src=*maybe_src;
477: Table& dest=static_cast<VTable *>(r.self)->table();
478: if(&src == &dest)
1.146 paf 479: throw Exception("parser.runtime",
1.91 parser 480: &method_name,
1.42 paf 481: "source and destination are same table");
482:
483: if(const Array *dest_columns=dest.columns()) { // dest is named
484: int saved_src_current=src.current();
485: for(int src_row=0; src_row<src.size(); src_row++) {
486: src.set_current(src_row);
487: Array& dest_row=*new(pool) Array(pool);
1.140 paf 488: for(int dest_column=0; dest_column<dest_columns->size(); dest_column++) {
489: const String *src_item=src.item(*dest_columns->get_string(dest_column));
490: dest_row+=src_item?src_item:new(pool) String(pool);
491: }
1.42 paf 492: dest+=&dest_row;
493: }
494: src.set_current(saved_src_current);
495: } else { // dest is nameless
496: for(int src_row=0; src_row<src.size(); src_row++)
497: dest+=&src.at(src_row);
498: }
499: }
500:
1.94 parser 501: #ifndef DOXYGEN
502: class Table_sql_event_handlers : public SQL_Driver_query_event_handlers {
503: public:
504: Table_sql_event_handlers(Pool& apool, const String& amethod_name,
505: const String& astatement_string, const char *astatement_cstr) :
506: pool(apool),
507: method_name(amethod_name),
508: statement_string(astatement_string),
509: statement_cstr(astatement_cstr),
510: columns(*new(pool) Array(pool)),
1.134 paf 511: row(0),
1.94 parser 512: table(0)
513: {
514: }
515:
516: void add_column(void *ptr, size_t size) {
517: String *column=new(pool) String(pool);
518: column->APPEND_TAINTED(
519: (const char *)ptr, size,
520: statement_cstr, 0);
521: columns+=column;
522: }
523: void before_rows() {
524: table=new(pool) Table(pool, &method_name, &columns);
525: }
526: void add_row() {
527: (*table)+=(row=new(pool) Array(pool));
528: }
529: void add_row_cell(void *ptr, size_t size) {
530: String *cell=new(pool) String(pool);
531: if(size)
532: cell->APPEND_TAINTED(
533: (const char *)ptr, size,
1.134 paf 534: statement_cstr, table->size()-1);
1.94 parser 535: (*row)+=cell;
536: }
537:
538: private:
539: Pool& pool;
540: const String& method_name;
541: const String& statement_string; const char *statement_cstr;
542: Array& columns;
543: Array *row;
544: public:
545: Table *table;
546: };
547: #endif
1.61 paf 548: static void _sql(Request& r, const String& method_name, MethodParams *params) {
1.49 paf 549: Pool& pool=r.pool();
550:
1.90 parser 551: Value& statement=params->as_junction(0, "statement must be code");
1.49 paf 552:
1.53 paf 553: ulong limit=0;
1.100 parser 554: ulong offset=0;
1.49 paf 555: if(params->size()>1) {
1.109 parser 556: Value& voptions=params->as_no_junction(1, "options must be hash, not code");
557: if(voptions.is_defined())
1.128 parser 558: if(Hash *options=voptions.get_hash(&method_name)) {
1.109 parser 559: if(Value *vlimit=(Value *)options->get(*sql_limit_name))
1.147 paf 560: limit=(ulong)r.process_to_value(*vlimit).as_double();
1.109 parser 561: if(Value *voffset=(Value *)options->get(*sql_offset_name))
1.147 paf 562: offset=(ulong)r.process_to_value(*voffset).as_double();
1.109 parser 563: } else
1.146 paf 564: throw Exception("parser.runtime",
1.109 parser 565: &method_name,
566: "options must be hash");
1.49 paf 567: }
568:
1.54 paf 569: Temp_lang temp_lang(r, String::UL_SQL);
1.147 paf 570: const String& statement_string=r.process_to_string(statement);
1.55 paf 571: const char *statement_cstr=
1.138 paf 572: statement_string.cstr(String::UL_UNSPECIFIED, r.connection(&method_name));
1.94 parser 573: Table_sql_event_handlers handlers(pool, method_name,
574: statement_string, statement_cstr);
1.127 parser 575: try {
1.135 paf 576: #ifdef RESOURCES_DEBUG
577: struct timeval mt[2];
578: //measure:before
579: gettimeofday(&mt[0],NULL);
580: #endif
1.138 paf 581: r.connection(&method_name)->query(
1.91 parser 582: statement_cstr, offset, limit,
1.94 parser 583: handlers);
1.135 paf 584:
585: #ifdef RESOURCES_DEBUG
586: //measure:after connect
587: gettimeofday(&mt[1],NULL);
588:
589: double t[2];
590: for(int i=0;i<2;i++)
591: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
592:
593: r.sql_request_time+=t[1]-t[0];
594: #endif
1.127 parser 595: } catch(const Exception& e) { // query problem
596: // more specific source [were url]
1.146 paf 597: throw Exception("sql.execute",
1.127 parser 598: &statement_string,
599: "%s", e.comment());
1.52 paf 600: }
1.96 parser 601:
602: Table *result=
603: handlers.table?handlers.table: // query resulted in table? return it
604: new(pool) Table(pool, &method_name, 0); // query returned no table, fake it
1.49 paf 605:
606: // replace any previous table value
1.96 parser 607: static_cast<VTable *>(r.self)->set_table(*result);
1.49 paf 608: }
609:
1.88 parser 610: static void _columns(Request& r, const String& method_name, MethodParams *) {
611: Pool& pool=r.pool();
612:
613: Array& result_columns=*new(pool) Array(pool);
1.89 parser 614: result_columns+=new(pool) String(pool, "column");
1.88 parser 615: Table& result_table=*new(pool) Table(pool, &method_name, &result_columns);
616:
617: Table& source_table=static_cast<VTable *>(r.self)->table();
618: if(const Array *source_columns=source_table.columns()) {
1.98 parser 619: Array_iter i(*source_columns);
620: while(i.has_next()) {
1.88 parser 621: Array& result_row=*new(pool) Array(pool);
1.98 parser 622: result_row+=i.next();
1.88 parser 623: result_table+=&result_row;
624: }
625: }
626:
1.151 paf 627: r.write_no_lang(*new(pool) VTable(pool, &result_table));
1.88 parser 628: }
629:
1.148 paf 630: static void _select(Request& r, const String& method_name, MethodParams *params) {
631: Pool& pool=r.pool();
632:
633: Value& vcondition=params->as_junction(0, "condition must be expression");
634:
635: Table& source_table=static_cast<VTable *>(r.self)->table();
636: Table& result_table=*new(pool) Table(pool,
637: source_table.origin_string(),
638: source_table.columns()
639: );
640:
641: int saved_current=source_table.current();
642: int size=source_table.size();
643: for(int row=0; row<size; row++) {
644: source_table.set_current(row);
645:
1.150 paf 646: bool condition=r.process_to_value(vcondition,
1.149 paf 647: /*0/*no name* /,*/
1.148 paf 648: false/*don't intercept string*/).as_bool();
649:
650: if(condition) // ...condition is true=
651: result_table+=&source_table.at(row); // =green light to go to result
652: }
653: source_table.set_current(saved_current);
654:
1.151 paf 655: r.write_no_lang(*new(pool) VTable(pool, &result_table));
1.148 paf 656: }
657:
1.66 paf 658: // constructor
659:
1.151 paf 660: MTable::MTable(Pool& apool) : Methoded(apool, "table") {
1.142 paf 661: // ^table::create{data}
662: // ^table::create[nameless]{data}
663: // ^table::create[table]
664: add_native_method("create", Method::CT_DYNAMIC, _create, 1, 2);
665: // old name for compatibility with <= v 1.141 2002/01/25 11:33:45 paf
666: add_native_method("set", Method::CT_DYNAMIC, _create, 1, 2);
1.2 paf 667:
1.142 paf 668: // ^table::load[file]
669: // ^table::load[nameless;file]
1.66 paf 670: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 2);
1.22 paf 671:
672: // ^table.save[file]
673: // ^table.save[nameless;file]
1.66 paf 674: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 2);
1.6 paf 675:
676: // ^table.count[]
1.66 paf 677: add_native_method("count", Method::CT_DYNAMIC, _count, 0, 0);
1.6 paf 678:
679: // ^table.line[]
1.66 paf 680: add_native_method("line", Method::CT_DYNAMIC, _line, 0, 0);
1.6 paf 681:
1.10 paf 682: // ^table.offset[]
1.133 paf 683: // ^table.offset(offset)
684: // ^table.offset[cur|set](offset)
685: add_native_method("offset", Method::CT_DYNAMIC, _offset, 0, 2);
1.7 paf 686:
1.10 paf 687: // ^table.menu{code}
688: // ^table.menu{code}[delim]
1.66 paf 689: add_native_method("menu", Method::CT_DYNAMIC, _menu, 1, 2);
1.74 paf 690:
1.79 paf 691: // ^table:hash[key field name]
1.123 parser 692: // ^table:hash[key field name][value field name(s) string/table]
693: add_native_method("hash", Method::CT_DYNAMIC, _hash, 1, 2);
1.32 paf 694:
1.102 parser 695: // ^table.sort{string-key-maker} ^table.sort{string-key-maker}[desc|asc]
696: // ^table.sort(numeric-key-maker) ^table.sort(numeric-key-maker)[desc|asc]
1.66 paf 697: add_native_method("sort", Method::CT_DYNAMIC, _sort, 1, 2);
1.8 paf 698:
1.36 paf 699: // ^table.locate[field;value]
1.145 paf 700: add_native_method("locate", Method::CT_DYNAMIC, _locate, 1, 2);
1.39 paf 701:
702: // ^table.flip[]
1.66 paf 703: add_native_method("flip", Method::CT_DYNAMIC, _flip, 0, 0);
1.41 paf 704:
705: // ^table.append{r{tab}e{tab}c{tab}o{tab}r{tab}d}
1.66 paf 706: add_native_method("append", Method::CT_DYNAMIC, _append, 1, 1);
1.42 paf 707:
708: // ^table.join[table]
1.66 paf 709: add_native_method("join", Method::CT_DYNAMIC, _join, 1, 1);
1.49 paf 710:
711:
1.100 parser 712: // ^table:sql[query]
713: // ^table:sql[query][$.limit(1) $.offset(2)]
714: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.88 parser 715:
716: // ^table:columns[]
717: add_native_method("columns", Method::CT_DYNAMIC, _columns, 0, 0);
1.148 paf 718:
719: // ^table.select(expression) = table
720: add_native_method("select", Method::CT_DYNAMIC, _select, 1, 1);
1.66 paf 721: }
722:
723: // global variable
724:
725: Methoded *table_class;
726:
727: // creator
728:
729: Methoded *MTable_create(Pool& pool) {
730: return table_class=new(pool) MTable(pool);
1.40 paf 731: }
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