Annotation of parser3/src/classes/table.C, revision 1.199
1.20 paf 1: /** @file
1.47 paf 2: Parser: @b table parser class.
1.20 paf 3:
1.196 paf 4: Copyright (c) 2001-2004 ArtLebedev Group (http://www.artlebedev.com)
1.144 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.154 paf 6: */
1.20 paf 7:
1.199 ! paf 8: static const char * const IDENT_TABLE_C="$Date: 2004/03/30 08:32:17 $";
1.1 paf 9:
1.105 parser 10: #include "classes.h"
1.182 paf 11: #include "pa_vmethod_frame.h"
12:
1.16 paf 13: #include "pa_common.h"
1.1 paf 14: #include "pa_request.h"
15: #include "pa_vtable.h"
1.6 paf 16: #include "pa_vint.h"
1.51 paf 17: #include "pa_sql_connection.h"
1.72 paf 18: #include "pa_vbool.h"
1.1 paf 19:
1.66 paf 20: // class
21:
1.182 paf 22: class MTable: public Methoded {
1.66 paf 23: public: // VStateless_class
1.191 paf 24: Value* create_new_value(Pool&) { return new VTable(); }
1.66 paf 25:
26: public:
1.182 paf 27: MTable();
1.70 paf 28:
29: public: // Methoded
1.66 paf 30: bool used_directly() { return true; }
31: };
1.1 paf 32:
1.182 paf 33: // global variable
34:
35: DECLARE_CLASS_VAR(table, new MTable, 0);
36:
37: // defines for globals
38:
39: #define SQL_LIMIT_NAME "limit"
40: #define SQL_OFFSET_NAME "offset"
41: #define SQL_DEFAULT_NAME "default"
42: #define SQL_DISTINCT_NAME "distinct"
43: #define TABLE_REVERSE_NAME "reverse"
44:
45: // globals
46:
47: String sql_limit_name(SQL_LIMIT_NAME);
48: String sql_offset_name(SQL_OFFSET_NAME);
49: String sql_default_name(SQL_DEFAULT_NAME);
50: String sql_distinct_name(SQL_DISTINCT_NAME);
51: String table_reverse_name(TABLE_REVERSE_NAME);
52:
1.186 paf 53: // local defines
54:
1.187 paf 55: #define COLUMN_SEPARATOR_NAME "separator"
56: #define COLUMN_ENCLOSER_NAME "encloser"
1.186 paf 57:
58:
1.1 paf 59: // methods
1.66 paf 60:
1.182 paf 61: static Table::Action_options get_action_options(Request& r, MethodParams& params,
62: const Table& source) {
1.176 paf 63: Table::Action_options result;
1.182 paf 64: if(!params.count())
65: return result;
66:
67: Value& maybe_options=params.last();
68: /* can not do it:
69: want to enable ^table::create[$source;
70: # $.option[]
71: ]
72: but there is ^table.locate[name;value]
1.176 paf 73:
1.182 paf 74: if(maybe_options.is_string()) { // allow empty options
75: result.defined=true;
1.176 paf 76: return result;
1.182 paf 77: }
78: */
79: HashStringValue* options=maybe_options.get_hash();
1.176 paf 80: if(!options)
81: return result;
82:
83: result.defined=true;
84: bool defined_offset=false;
85:
86: int valid_options=0;
1.182 paf 87: if(Value* voffset=options->get(sql_offset_name)) {
1.176 paf 88: valid_options++;
89: defined_offset=true;
90: if(voffset->is_string()) {
1.182 paf 91: const String& soffset=*voffset->get_string();
1.176 paf 92: if(soffset == "cur")
93: result.offset=source.current();
94: else
1.164 paf 95: throw Exception("parser.runtime",
1.176 paf 96: &soffset,
97: "must be 'cur' string or expression");
98: } else
99: result.offset=r.process_to_value(*voffset).as_int();
100: }
1.182 paf 101: if(Value* vlimit=options->get(sql_limit_name)) {
1.176 paf 102: valid_options++;
103: result.limit=r.process_to_value(*vlimit).as_int();
104: }
1.182 paf 105: if(Value *vreverse=(Value *)options->get(table_reverse_name)) {
106: valid_options++;
107: result.reverse=r.process_to_value(*vreverse).as_bool();
108: if(result.reverse && !defined_offset)
109: result.offset=source.count()-1;
110: }
111:
112: if(valid_options!=options->count())
1.176 paf 113: throw Exception("parser.runtime",
1.182 paf 114: 0,
1.176 paf 115: "called with invalid option");
116:
117: return result;
118: }
1.180 paf 119: static void check_option_param(bool options_defined,
1.182 paf 120: MethodParams& params, size_t next_param_index,
1.176 paf 121: const char *msg) {
1.182 paf 122: if(next_param_index+(options_defined?1:0) != params.count())
1.176 paf 123: throw Exception("parser.runtime",
1.182 paf 124: 0,
1.176 paf 125: "%s", msg);
1.157 paf 126: }
127:
1.182 paf 128: static void _create(Request& r, MethodParams& params) {
1.157 paf 129: // clone/copy part?
1.182 paf 130: if(Table *source=params[0].get_table()) {
131: Table::Action_options o=get_action_options(r, params, *source);
132: check_option_param(o.defined, params, 1,
1.176 paf 133: "too many parameters");
1.182 paf 134: GET_SELF(r, VTable).set_table(*new Table(*source, o));
1.157 paf 135: return;
136: }
1.142 paf 137:
1.1 paf 138: // data is last parameter
1.182 paf 139: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
140: const String& data=
141: r.process_to_string(params.as_junction(params.count()-1, "body must be code"));
1.44 paf 142:
143: // parse columns
1.182 paf 144: size_t raw_pos_after=0;
145: Table::columns_type columns;
146: if(params.count()==2) {
147: columns=Table::columns_type(0); // nameless
1.21 paf 148: } else {
1.182 paf 149: columns=Table::columns_type(new ArrayString);
1.44 paf 150:
1.182 paf 151: ArrayString head;
152: data.split(head, raw_pos_after, "\n", String::L_AS_IS, 1);
153: if(head.count()) {
154: size_t col_pos_after=0;
155: head[0]->split(*columns, col_pos_after, "\t", String::L_AS_IS);
156: }
1.44 paf 157: }
158:
1.182 paf 159: Table& table=*new Table(columns);
1.44 paf 160: // parse cells
1.182 paf 161:
162: ArrayString rows;
163: data.split(rows, raw_pos_after, "\n", String::L_AS_IS);
164: Array_iterator<const String*> i(rows);
1.98 parser 165: while(i.has_next()) {
1.182 paf 166: Table::element_type row(new ArrayString);
167: const String& string=*i.next();
1.118 parser 168: // remove comment lines
1.182 paf 169: if(!string.length())
1.44 paf 170: continue;
171:
1.182 paf 172: size_t col_pos_after=0;
173: string.split(*row, col_pos_after, "\t", String::L_AS_IS);
174: table+=row;
1.17 paf 175: }
1.1 paf 176:
1.44 paf 177: // replace any previous table value
1.182 paf 178: GET_SELF(r, VTable).set_table(table);
1.44 paf 179: }
180:
1.187 paf 181: struct lsplit_result {
182: char* piece;
183: char delim;
184:
185: operator bool() { return piece!=0; }
186: };
187:
188: inline lsplit_result lsplit(char* string, char delim1, char delim2) {
189: lsplit_result result;
190: if(string) {
191: char delims[]={delim1, delim2, 0};
192: if(char* v=strpbrk(string, delims)) {
193: result.delim=*v;
194: *v=0;
195: result.piece=v+1;
196: return result;
197: }
198: }
199: result.piece=0;
200: result.delim=0;
201: return result;
202: }
203:
204: inline lsplit_result lsplit(char* *string_ref, char delim1, char delim2) {
205: lsplit_result result;
206: result.piece=*string_ref;
207: lsplit_result next=lsplit(*string_ref, delim1, delim2);
208: result.delim=next.delim;
209: *string_ref=next.piece;
210: return result;
211: }
212:
213: static lsplit_result lsplit(char** string_ref, char delim1, char delim2, char encloser) {
214: lsplit_result result;
215:
216: if(char* string=*string_ref) {
217: if(encloser && *string==encloser) {
218: string++;
219:
220: char *read;
221: char *write;
222: write=read=string;
223: char c;
1.193 paf 224: while((c=*read++)) {
1.187 paf 225: if(c==encloser) {
226: char n=*read;
227: if(n==encloser) // double-encloser stands for encloser
228: read++;
229: else if(n==delim1 || n==delim2) {
230: result.delim=n;
231: read++;
232: break;
233: }
234: }
235:
236: *write++=c;
237: }
238: *write=0; // terminate
239: *string_ref=c? read: 0;
240: result.piece=string;
241: return result;
242: } else
243: return lsplit(string_ref, delim1, delim2);
244: }
245: result.piece=0;
246: return result;
247: }
248:
249: static void skip_empty_and_comment_lines( char** data_ref ) {
250: if(char *data=*data_ref) {
251: while( char c=*data ) {
252: if( c== '\n' || c == '#' ) {
253: /*nowhere=*/getrow(&data); // remove empty&comment lines
1.199 ! paf 254: if(!(*data_ref=data))
! 255: break;
1.187 paf 256: continue;
257: }
258: break;
259: }
260: }
261: }
262:
263: struct TableSeparators {
264: char column;
265: char encloser;
1.188 paf 266: const String* sencloser;
1.187 paf 267:
268: TableSeparators() {
269: column='\t';
270: encloser=0;
271: }
272: void load( HashStringValue& options ) {
273: if(Value* vseparator=options.get(COLUMN_SEPARATOR_NAME)) {
274: options.remove(COLUMN_SEPARATOR_NAME);
275: const String& sseparator=vseparator->as_string();
276: if(sseparator.length()!=1)
277: throw Exception("parser.runtime",
278: &sseparator,
279: "separator must be one character long");
280: column=sseparator.first_char();
281: }
282: if(Value* vencloser=options.get(COLUMN_ENCLOSER_NAME)) {
283: options.remove(COLUMN_ENCLOSER_NAME);
1.188 paf 284: sencloser=&vencloser->as_string();
285: if(sencloser->length()!=1)
1.187 paf 286: throw Exception("parser.runtime",
1.188 paf 287: sencloser,
1.187 paf 288: "encloser must be one character long");
1.188 paf 289: encloser=sencloser->first_char();
1.187 paf 290: }
291: }
292: };
293:
1.182 paf 294: static void _load(Request& r, MethodParams& params) {
295: const String& first_param=params.as_string(0, "file name must be string");
1.168 paf 296: int filename_param_index=0;
297: bool nameless=first_param=="nameless";
298: if(nameless)
299: filename_param_index++;
1.182 paf 300: size_t options_param_index=filename_param_index+1;
1.186 paf 301:
302: HashStringValue *options=0;
1.187 paf 303: TableSeparators separators;
1.186 paf 304: if(options_param_index<params.count()
305: && (options=params.as_no_junction(options_param_index, "additional params must be hash").get_hash())) {
306: // cloning, so that we could change [to simplify checks on params inside file_read_text
307: options=new HashStringValue(*options);
1.187 paf 308: separators.load(*options);
1.186 paf 309: }
310:
1.44 paf 311: // loading text
1.182 paf 312: char *data=file_read_text(r.charsets,
313: r.absolute(params.as_string(filename_param_index, "file name must be string")),
1.168 paf 314: true,
1.186 paf 315: options
1.168 paf 316: );
1.44 paf 317:
1.1 paf 318: // parse columns
1.182 paf 319: Table::columns_type columns;
1.168 paf 320: if(nameless) {
1.182 paf 321: columns=Table::columns_type(0); // nameless
1.1 paf 322: } else {
1.182 paf 323: columns=Table::columns_type(new ArrayString);
1.1 paf 324:
1.187 paf 325: skip_empty_and_comment_lines(&data);
326: while( lsplit_result sr=lsplit(&data, separators.column, '\n', separators.encloser) ) {
327: *columns+=new String(sr.piece, 0, true);
328: if(sr.delim=='\n')
329: break;
1.139 paf 330: }
1.1 paf 331: }
1.187 paf 332:
333: Table& table=*new Table(columns);
1.1 paf 334:
335: // parse cells
1.187 paf 336: Table::element_type row(new ArrayString);
337: skip_empty_and_comment_lines(&data);
338: while( lsplit_result sr=lsplit(&data, separators.column, '\n', separators.encloser) ) {
339: if(!sr.delim && !row->count()) // append last empty column [if without \n]
340: break;
341: *row+=new String(sr.piece, 0, true);
342: if(sr.delim=='\n') {
343: table+=row;
344: row=new ArrayString;
345: skip_empty_and_comment_lines(&data);
1.1 paf 346: }
1.187 paf 347: }
348: // last line [if without \n]
349: if(row->count())
1.1 paf 350: table+=row;
1.187 paf 351:
1.1 paf 352: // replace any previous table value
1.182 paf 353: GET_SELF(r, VTable).set_table(table);
1.1 paf 354: }
1.2 paf 355:
1.188 paf 356: static void maybe_enclose( String& to, const String& from, char encloser, const String* sencloser ) {
357: if(encloser) {
358: to<<*sencloser;
359: // while we have 'encloser'...
1.189 paf 360: size_t pos_after=0;
361: for( size_t pos_before; (pos_before=from.pos( encloser, pos_after ))!=STRING_NOT_FOUND; pos_after=pos_before+1) {
1.188 paf 362: to<<from.mid(pos_before+1/*+found encloser*/, pos_after-pos_before);
363: to<<*sencloser; // doubling encloser
364: }
365: // last piece
366: size_t from_length=from.length();
367: if(pos_after<from_length)
368: to<<from.mid(pos_after, from_length);
369:
370: to<<*sencloser;
371: } else
372: to.append(from, String::L_TABLE);
373: }
374:
375:
1.182 paf 376: static void _save(Request& r, MethodParams& params) {
1.188 paf 377: const String& first_arg=params.as_string(0, "first argument must not be code");
378: size_t param_index=1;
379:
380: bool do_append=false;
381: bool output_column_names=true;
382:
383: // mode?
384: if(first_arg=="append")
385: do_append=true;
386: else if(first_arg=="nameless")
387: output_column_names=false;
388: else
389: --param_index;
390:
391: const String& file_name=params.as_string(param_index++, "file name must not be code");
392:
393: TableSeparators separators;
394: if(param_index<params.count()) {
395: if(HashStringValue *options=params.as_no_junction(param_index++, "additional params must be hash").get_hash()) {
396: separators.load(*options);
397: if(options->count())
398: throw Exception("parser.runtime",
399: 0,
400: "invalid option passed");
401: } else
402: throw Exception("parser.runtime",
403: 0,
404: "additional params must be hash (did you spell mode parameter correctly?)");
405:
406: }
407: if(param_index<params.count())
408: throw Exception("parser.runtime",
409: 0,
410: "bad mode (must be nameless or append)");
1.22 paf 411:
1.182 paf 412: Table& table=GET_SELF(r, VTable).table();
1.31 paf 413:
1.182 paf 414: String sdata;
1.188 paf 415: if(output_column_names) {
1.31 paf 416: if(table.columns()) { // named table
1.182 paf 417: for(Array_iterator<const String*> i(*table.columns()); i.has_next(); ) {
1.188 paf 418: maybe_enclose( sdata, *i.next(), separators.encloser, separators.sencloser );
1.98 parser 419: if(i.has_next())
1.182 paf 420: sdata.append_know_length("\t", 1, String::L_CLEAN);
1.31 paf 421: }
1.188 paf 422: } else { // nameless table [we were asked to output column names]
1.182 paf 423: if(int lsize=table.count()?table[0]->count():0)
1.31 paf 424: for(int column=0; column<lsize; column++) {
1.182 paf 425: char *cindex_tab=new(PointerFreeGC) char[MAX_NUMBER];
426: sdata.append_know_length(cindex_tab,
1.185 paf 427: snprintf(cindex_tab, MAX_NUMBER,
428: column<lsize-1?"%d\t":"%d", column),
429: String::L_CLEAN);
1.31 paf 430: }
431: else
1.182 paf 432: sdata.append_help_length("empty nameless table", 0, String::L_CLEAN);
1.31 paf 433: }
1.182 paf 434: sdata.append_know_length("\n", 1, String::L_CLEAN);
1.188 paf 435: }
1.129 paf 436:
1.31 paf 437: // data lines
1.182 paf 438: Array_iterator<ArrayString*> i(table);
1.98 parser 439: while(i.has_next()) {
1.182 paf 440: for(Array_iterator<const String*> c(*i.next()); c.has_next(); ) {
1.188 paf 441: maybe_enclose( sdata, *c.next(), separators.encloser, separators.sencloser );
1.98 parser 442: if(c.has_next())
1.182 paf 443: sdata.append_know_length("\t", 1, String::L_CLEAN);
1.31 paf 444: }
1.182 paf 445: sdata.append_know_length("\n", 1, String::L_CLEAN);
1.31 paf 446: }
447:
448: // write
1.188 paf 449: file_write(r.absolute(file_name),
1.182 paf 450: sdata.cstr(), sdata.length(), true, do_append);
1.22 paf 451: }
452:
1.182 paf 453: static void _count(Request& r, MethodParams&) {
454: int result=GET_SELF(r, VTable).table().count();
455: r.write_no_lang(*new VInt(result));
1.6 paf 456: }
457:
1.182 paf 458: static void _line(Request& r, MethodParams&) {
459: int result=1+GET_SELF(r, VTable).table().current();
460: r.write_no_lang(*new VInt(result));
1.6 paf 461: }
462:
1.182 paf 463: static void _offset(Request& r, MethodParams& params) {
464: Table& table=GET_SELF(r, VTable).table();
465: if(params.count()) {
1.133 paf 466: bool absolute=false;
1.182 paf 467: if(params.count()>1) {
468: const String& whence=params.as_string(0, "whence must be string");
1.133 paf 469: if(whence=="cur")
1.134 paf 470: absolute=false;
1.133 paf 471: else if(whence=="set")
1.134 paf 472: absolute=true;
1.133 paf 473: else
1.146 paf 474: throw Exception("parser.runtime",
1.134 paf 475: &whence,
476: "is invalid whence, valid are 'cur' or 'set'");
1.157 paf 477: }
1.133 paf 478:
1.182 paf 479: Value& offset_expr=params.as_junction(params.count()-1, "offset must be expression");
1.147 paf 480: table.offset(absolute, r.process_to_value(offset_expr).as_int());
1.151 paf 481: } else
1.182 paf 482: r.write_no_lang(*new VInt(table.current()));
1.6 paf 483: }
484:
1.182 paf 485: static void _menu(Request& r, MethodParams& params) {
486: Value& body_code=params.as_junction(0, "body must be code");
1.7 paf 487:
1.182 paf 488: Value* delim_maybe_code=params.count()>1?¶ms[1]:0;
1.7 paf 489:
1.182 paf 490: Table& table=GET_SELF(r, VTable).table();
1.7 paf 491: bool need_delim=false;
1.99 parser 492: int saved_current=table.current();
1.182 paf 493: int size=table.count();
1.99 parser 494: for(int row=0; row<size; row++) {
1.22 paf 495: table.set_current(row);
1.7 paf 496:
1.161 paf 497: StringOrValue sv_processed=r.process(body_code);
1.182 paf 498: const String* s_processed=sv_processed.get_string();
499: if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
1.161 paf 500: if(need_delim) // need delim & iteration produced string?
1.150 paf 501: r.write_pass_lang(r.process(*delim_maybe_code));
1.7 paf 502: need_delim=true;
503: }
1.161 paf 504: r.write_pass_lang(sv_processed);
1.7 paf 505: }
1.99 parser 506: table.set_current(saved_current);
1.7 paf 507: }
508:
1.110 parser 509: #ifndef DOXYGEN
1.174 paf 510: enum Table2hash_distint { D_ILLEGAL, D_FIRST, D_TABLES };
1.74 paf 511: struct Row_info {
1.166 paf 512: Request *r;
1.74 paf 513: Table *table;
1.182 paf 514: Value* key_code;
515: size_t key_field;
516: Array<int>* value_fields;
517: HashStringValue* hash;
1.174 paf 518: Table2hash_distint distinct;
1.182 paf 519: size_t row;
1.74 paf 520: };
1.110 parser 521: #endif
1.182 paf 522: static void table_row_to_hash(Table::element_type row, Row_info *info) {
523: const String* key;
524: if(info->key_code) {
525: info->table->set_current(info->row++); // change context row
526: StringOrValue sv_processed=info->r->process(*info->key_code);
1.166 paf 527: key=&sv_processed.as_string();
528: } else
1.182 paf 529: key=info->key_field<row->count()?row->get(info->key_field):0;
1.166 paf 530:
531: if(!key)
532: return; // ignore rows without key [too-short-record_array if-indexed]
1.74 paf 533:
1.182 paf 534: switch(info->distinct) {
1.174 paf 535: case D_ILLEGAL: case D_FIRST:
536: {
1.182 paf 537: VHash* vhash=new VHash;
538: HashStringValue& hash=vhash->hash();
539: for(Array_iterator<int> i(*info->value_fields); i.has_next(); ) {
540: size_t value_field=i.next();
541: if(value_field<row->count())
1.174 paf 542: hash.put(
1.182 paf 543: *info->table->columns()->get(value_field),
544: new VString(*row->get(value_field)));
1.174 paf 545: }
546:
1.182 paf 547: if(info->hash->put_dont_replace(*key, vhash)) // put. existed?
548: if(info->distinct==D_ILLEGAL)
1.174 paf 549: throw Exception("parser.runtime",
550: key,
551: "duplicate key");
552: }
553: break;
554: case D_TABLES:
555: {
1.182 paf 556: VTable* vtable=(VTable*)info->hash->get(*key); // put. table existed?
1.174 paf 557: Table* table;
558: if(vtable)
559: table=vtable->get_table();
560: else {
561: // no? creating table of same structure as source
1.179 paf 562: Table::Action_options table_options(0, 0);
1.182 paf 563: table=new Table(*info->table, table_options/*no rows, just structure*/);
564: info->hash->put(*key, new VTable(table));
1.174 paf 565: }
1.182 paf 566: *table+=row;
1.174 paf 567: }
568: break;
569: default:
570: throw Exception(0,
571: 0,
1.182 paf 572: "invalid distinct code (#%d)", info->distinct);
1.74 paf 573: }
574: }
1.182 paf 575: static void _hash(Request& r, MethodParams& params) {
576: Table& self_table=GET_SELF(r, VTable).table();
577: VHash& result=*new VHash;
578: if(Table::columns_type columns=self_table.columns())
579: if(columns->count()>0) {
1.174 paf 580: Table2hash_distint distinct=D_ILLEGAL;
1.182 paf 581: int param_index=params.count()-1;
1.166 paf 582: if(param_index>0) {
1.182 paf 583: if(HashStringValue* options=
584: params.as_no_junction(param_index, "param must not be code").get_hash()) {
1.166 paf 585: --param_index;
586: int valid_options=0;
1.182 paf 587: if(Value* vdistinct_code=options->get(sql_distinct_name)) {
1.166 paf 588: valid_options++;
1.174 paf 589: Value& vdistinct_value=r.process_to_value(*vdistinct_code);
590: if(vdistinct_value.is_string()) {
591: const String& sdistinct=*vdistinct_value.get_string();
592: if(sdistinct=="tables")
593: distinct=D_TABLES;
594: else
595: throw Exception("parser.runtime",
596: &sdistinct,
597: "must be 'tables' or true/false");
598: } else
599: distinct=vdistinct_value.as_bool()?D_FIRST:D_ILLEGAL;
1.166 paf 600: }
1.182 paf 601: if(valid_options!=options->count())
1.166 paf 602: throw Exception("parser.runtime",
1.182 paf 603: 0,
1.166 paf 604: "called with invalid option");
1.163 paf 605: }
606: }
607: if(param_index==2) // bad options param type
608: throw Exception("parser.runtime",
1.182 paf 609: 0,
1.163 paf 610: "options must be hash");
611:
1.182 paf 612: Array<int> value_fields;
1.163 paf 613: if(param_index>0) {
1.174 paf 614: if(distinct!=D_ILLEGAL && distinct!=D_FIRST)
615: throw Exception("parser.runtime",
616: 0,
617: "in distinct[tables] mode you may not specify value field(s)");
1.182 paf 618: Value& value_fields_param=params.as_no_junction(param_index, "value field(s) must not be code");
1.123 parser 619: if(value_fields_param.is_string()) {
1.182 paf 620: value_fields+=self_table.column_name2index(
621: *value_fields_param.get_string(), true);
622: } else if(Table* value_fields_table=value_fields_param.get_table()) {
623: for(Array_iterator<Table::element_type> i(*value_fields_table);
624: i.has_next(); ) {
625: const String& value_field_name
626: =*i.next()->get(0);
627: value_fields
628: +=self_table.column_name2index(value_field_name, true);
1.123 parser 629: }
630: } else
1.146 paf 631: throw Exception("parser.runtime",
1.182 paf 632: 0,
1.197 paf 633: "value field(s) must be string or table"
1.123 parser 634: );
635: } else { // by all columns, including key
1.174 paf 636: if(!(distinct!=D_ILLEGAL && distinct!=D_FIRST))
1.182 paf 637: for(size_t i=0; i<columns->count(); i++)
1.174 paf 638: value_fields+=i;
1.74 paf 639: }
640:
1.182 paf 641:
642: {
643: Value* key_param=¶ms[0];
1.193 paf 644: Row_info info={
645: &r,
646: &self_table,
647: /*key_code=*/key_param->get_junction()?key_param:0,
1.197 paf 648: /*key_field=*/0/*filled below*/,
1.193 paf 649: &value_fields,
650: &result.hash(),
651: distinct,
652: /*row=*/0
653: };
1.195 paf 654: info.key_field=(info.key_code?-1
655: :self_table.column_name2index(key_param->as_string(), true));
1.182 paf 656:
657: int saved_current=self_table.current();
658: self_table.for_each(table_row_to_hash, &info);
659: self_table.set_current(saved_current);
660: }
1.74 paf 661: }
1.97 parser 662: r.write_no_lang(result);
1.74 paf 663: }
664:
1.110 parser 665: #ifndef DOXYGEN
1.78 paf 666: struct Table_seq_item {
1.182 paf 667: ArrayString* row;
1.34 paf 668: union {
1.182 paf 669: const char *c_str;
1.34 paf 670: double d;
671: } value;
1.32 paf 672: };
1.110 parser 673: #endif
1.34 paf 674: static int sort_cmp_string(const void *a, const void *b) {
675: return strcmp(
1.78 paf 676: static_cast<const Table_seq_item *>(a)->value.c_str,
677: static_cast<const Table_seq_item *>(b)->value.c_str
1.34 paf 678: );
679: }
680: static int sort_cmp_double(const void *a, const void *b) {
1.78 paf 681: double va=static_cast<const Table_seq_item *>(a)->value.d;
682: double vb=static_cast<const Table_seq_item *>(b)->value.d;
1.34 paf 683: if(va<vb)
684: return -1;
685: else if(va>vb)
686: return +1;
687: else
688: return 0;
689: }
1.182 paf 690: static void _sort(Request& r, MethodParams& params) {
691: Value& key_maker=params.as_junction(0, "key-maker must be code");
1.61 paf 692:
1.182 paf 693: bool reverse=params.count()>1/*..[desc|asc|]*/?
694: reverse=params.as_no_junction(1, "order must not be code").as_string()=="desc":
1.104 parser 695: false; // default=asc
1.32 paf 696:
1.182 paf 697: Table& old_table=GET_SELF(r, VTable).table();
698: Table& new_table=*new Table(old_table.columns());
1.34 paf 699:
1.182 paf 700: Table_seq_item* seq=new(PointerFreeGC) Table_seq_item[old_table.count()];
1.34 paf 701: int i;
702:
703: // calculate key values
704: bool key_values_are_strings=true;
1.182 paf 705: int old_count=old_table.count();
706: for(i=0; i<old_count; i++) {
1.101 parser 707: old_table.set_current(i);
1.32 paf 708: // calculate key value
1.182 paf 709: seq[i].row=old_table[i];
710: Value& value=r.process_to_value(key_maker).as_expr_result(true/*return string as-is*/);
1.34 paf 711: if(i==0) // determining key values type by first one
712: key_values_are_strings=value.is_string();
713:
714: if(key_values_are_strings)
715: seq[i].value.c_str=value.as_string().cstr();
716: else
717: seq[i].value.d=value.as_double();
1.32 paf 718: }
719: // sort keys
1.182 paf 720: _qsort(seq, old_count, sizeof(Table_seq_item),
1.34 paf 721: key_values_are_strings?sort_cmp_string:sort_cmp_double);
1.32 paf 722:
1.34 paf 723: // reorder table as they require in 'seq'
1.182 paf 724: for(i=0; i<old_count; i++)
725: new_table+=Table::element_type(seq[reverse?old_count-1-i:i].row);
726:
727: delete[] seq;
1.32 paf 728:
1.116 parser 729: // replace any previous table value
1.182 paf 730: GET_SELF(r, VTable).set_table(new_table);
1.32 paf 731: }
732:
1.176 paf 733: #ifndef DOXYGEN
1.182 paf 734: struct Expression_is_true_info {
1.176 paf 735: Request* r;
736: Value* expression_code;
737: };
738: #endif
1.191 paf 739: static bool expression_is_true(Table&, Expression_is_true_info* info) {
740: return info->r->process_to_value(*info->expression_code).as_bool();
1.176 paf 741: }
742: static bool _locate_expression(Table& table, Table::Action_options o,
1.182 paf 743: Request& r, MethodParams& params) {
744: check_option_param(o.defined, params, 1,
1.176 paf 745: "locate by expression only has parameters: expression and, maybe, options");
1.182 paf 746: Value& expression_code=params.as_junction(0, "must be expression");
1.145 paf 747:
1.182 paf 748: Expression_is_true_info info={&r, &expression_code};
749: return table.table_first_that(expression_is_true, &info, o);
1.145 paf 750: }
1.176 paf 751: static bool _locate_name_value(Table& table, Table::Action_options o,
1.191 paf 752: Request&, MethodParams& params) {
1.182 paf 753: check_option_param(o.defined, params, 2,
1.176 paf 754: "locate by locate by name has parameters: name, value and, maybe, options");
1.182 paf 755: const String& name=params.as_string(0, "column name must be string");
756: const String& value=params.as_string(1, "value must be string");
757: return table.locate(name, value, o);
758: }
759: static void _locate(Request& r, MethodParams& params) {
760: Table& table=GET_SELF(r, VTable).table();
1.72 paf 761:
1.182 paf 762: Table::Action_options o=get_action_options(r, params, table);
763:
764: bool result=params[0].get_junction()?
765: _locate_expression(table, o, r, params) :
766: _locate_name_value(table, o, r, params);
767: r.write_no_lang(*new VBool(result));
1.145 paf 768: }
1.182 paf 769:
770:
1.191 paf 771: static void _flip(Request& r, MethodParams&) {
1.182 paf 772: Table& old_table=GET_SELF(r, VTable).table();
1.184 paf 773: Table& new_table=*new Table(0);
1.182 paf 774: if(size_t old_count=old_table.count())
775: if(size_t old_cols=old_table[0]->count())
776: for(size_t column=0; column<old_cols; column++) {
777: Table::element_type new_row(new ArrayString(old_count));
778: for(size_t i=0; i<old_count; i++) {
779: Table::element_type old_row=old_table[i];
780: *new_row+=column<old_row->count()?old_row->get(column):new String;
1.39 paf 781: }
1.182 paf 782: new_table+=new_row;
1.39 paf 783: }
784:
1.182 paf 785: r.write_no_lang(*new VTable(&new_table));
1.39 paf 786: }
787:
1.182 paf 788: static void _append(Request& r, MethodParams& params) {
1.134 paf 789: // data
1.182 paf 790: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
791: const String& string=r.process_to_string(params.as_junction(0, "body must be code"));
1.41 paf 792:
793: // parse cells
1.182 paf 794: Table::element_type row=new ArrayString;
795: size_t pos_after=0;
796: string.split(*row, pos_after, "\t", String::L_AS_IS);
1.41 paf 797:
1.182 paf 798: GET_SELF(r, VTable).table()+=row;
1.41 paf 799: }
800:
1.182 paf 801: static void join_named_row(Table& src, Table* dest) {
802: Table::columns_type dest_columns=dest->columns();
803: size_t dest_columns_count=dest_columns->count();
804: Table::element_type dest_row(new ArrayString(dest_columns_count));
805: for(size_t dest_column=0; dest_column<dest_columns_count; dest_column++) {
806: const String* src_item=src.item(*dest_columns->get(dest_column));
807: *dest_row+=src_item?src_item:new String;
808: }
809: *dest+=dest_row;
810: }
811: static void join_nameless_row(Table& src, Table* dest) {
812: *dest+=src[src.current()];
813: }
814: static void _join(Request& r, MethodParams& params) {
815: Table* maybe_src=params.as_no_junction(0, "table ref must not be code").get_table();
1.42 paf 816: if(!maybe_src)
1.146 paf 817: throw Exception("parser.runtime",
1.182 paf 818: 0,
1.42 paf 819: "source is not a table");
1.176 paf 820: Table& src=*maybe_src;
821:
1.182 paf 822: Table::Action_options o=get_action_options(r, params, src);
823: check_option_param(o.defined, params, 1,
1.176 paf 824: "invalid extra parameter");
1.42 paf 825:
1.182 paf 826: Table& dest=GET_SELF(r, VTable).table();
1.42 paf 827: if(&src == &dest)
1.146 paf 828: throw Exception("parser.runtime",
1.182 paf 829: 0,
1.42 paf 830: "source and destination are same table");
831:
1.193 paf 832: if(dest.columns()) // dest is named
1.182 paf 833: src.table_for_each(join_named_row, &dest, o);
834: else // dest is nameless
835: src.table_for_each(join_nameless_row, &dest, o);
1.42 paf 836: }
837:
1.94 parser 838: #ifndef DOXYGEN
1.169 paf 839: class Table_sql_event_handlers: public SQL_Driver_query_event_handlers {
1.182 paf 840: ArrayString& columns;
841: ArrayString* row;
1.94 parser 842: public:
1.182 paf 843: Table* table;
844: public:
845: Table_sql_event_handlers() :
846: columns(*new ArrayString), row(0), table(0) {
1.94 parser 847: }
848:
1.182 paf 849: bool add_column(SQL_Error& error, const char *str, size_t length) {
1.170 paf 850: try {
1.182 paf 851: columns+=new String(str, length, true);
1.170 paf 852: return false;
853: } catch(...) {
854: error=SQL_Error("exception occured in Table_sql_event_handlers::add_column");
855: return true;
856: }
857: }
858: bool before_rows(SQL_Error& error) {
859: try {
1.182 paf 860: table=new Table(&columns);
1.170 paf 861: return false;
862: } catch(...) {
863: error=SQL_Error("exception occured in Table_sql_event_handlers::before_rows");
864: return true;
865: }
866: }
867: bool add_row(SQL_Error& error) {
868: try {
1.182 paf 869: *table+=row=new ArrayString;
1.170 paf 870: return false;
871: } catch(...) {
872: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row");
873: return true;
874: }
875: }
1.182 paf 876: bool add_row_cell(SQL_Error& error, const char* str, size_t length) {
1.170 paf 877: try {
1.182 paf 878: String& cell=*new String;
879: if(length)
880: cell.append_know_length(str, length, String::L_TAINTED);
881: *row+=&cell;
1.170 paf 882: return false;
883: } catch(...) {
884: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row_cell");
885: return true;
886: }
1.94 parser 887: }
888: };
889: #endif
1.182 paf 890: static void _sql(Request& r, MethodParams& params) {
891: Value& statement=params.as_junction(0, "statement must be code");
1.49 paf 892:
1.53 paf 893: ulong limit=0;
1.100 parser 894: ulong offset=0;
1.182 paf 895: if(params.count()>1) {
896: Value& voptions=params.as_no_junction(1, "options must be hash, not code");
1.156 paf 897: if(!voptions.is_string())
1.182 paf 898: if(HashStringValue* options=voptions.get_hash()) {
1.164 paf 899: int valid_options=0;
1.182 paf 900: if(Value* vlimit=options->get(sql_limit_name)) {
1.164 paf 901: valid_options++;
1.147 paf 902: limit=(ulong)r.process_to_value(*vlimit).as_double();
1.164 paf 903: }
1.182 paf 904: if(Value* voffset=options->get(sql_offset_name)) {
1.164 paf 905: valid_options++;
1.147 paf 906: offset=(ulong)r.process_to_value(*voffset).as_double();
1.164 paf 907: }
1.182 paf 908: if(valid_options!=options->count())
1.164 paf 909: throw Exception("parser.runtime",
1.182 paf 910: 0,
1.164 paf 911: "called with invalid option");
1.109 parser 912: } else
1.146 paf 913: throw Exception("parser.runtime",
1.182 paf 914: 0,
1.109 parser 915: "options must be hash");
1.49 paf 916: }
917:
1.182 paf 918: Temp_lang temp_lang(r, String::L_SQL);
919: const String& statement_string=r.process_to_string(statement);
920: const char* statement_cstr=
921: statement_string.cstr(String::L_UNSPECIFIED, r.connection());
922: Table_sql_event_handlers handlers;
1.135 paf 923: #ifdef RESOURCES_DEBUG
924: struct timeval mt[2];
925: //measure:before
926: gettimeofday(&mt[0],NULL);
927: #endif
1.182 paf 928: r.connection()->query(
1.160 paf 929: statement_cstr, offset, limit,
930: handlers,
931: statement_string);
1.135 paf 932:
933: #ifdef RESOURCES_DEBUG
934: //measure:after connect
935: gettimeofday(&mt[1],NULL);
936:
937: double t[2];
938: for(int i=0;i<2;i++)
939: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
940:
941: r.sql_request_time+=t[1]-t[0];
942: #endif
1.96 parser 943:
1.182 paf 944: Table& result=
945: handlers.table?*handlers.table: // query resulted in table? return it
946: *new Table(Table::columns_type(0)); // query returned no table, fake it
1.49 paf 947:
948: // replace any previous table value
1.182 paf 949: GET_SELF(r, VTable).set_table(result);
1.49 paf 950: }
951:
1.182 paf 952: static void _columns(Request& r, MethodParams&) {
1.88 parser 953:
1.182 paf 954: Table::columns_type result_columns(new ArrayString);
955: *result_columns+=new String("column");
956: Table& result_table=*new Table(result_columns);
1.88 parser 957:
1.182 paf 958: Table& source_table=GET_SELF(r, VTable).table();
959: if(Table::columns_type source_columns=source_table.columns()) {
960: for(Array_iterator<const String*> i(*source_columns); i.has_next(); ) {
961: Table::element_type result_row(new ArrayString);
962: *result_row+=i.next();
963: result_table+=result_row;
1.88 parser 964: }
965: }
966:
1.182 paf 967: r.write_no_lang(*new VTable(&result_table));
1.88 parser 968: }
969:
1.182 paf 970: static void _select(Request& r, MethodParams& params) {
971: Value& vcondition=params.as_junction(0, "condition must be expression");
1.148 paf 972:
1.182 paf 973: Table& source_table=GET_SELF(r, VTable).table();
974: Table& result_table=*new Table(source_table.columns());
1.148 paf 975:
976: int saved_current=source_table.current();
1.182 paf 977: int size=source_table.count();
1.148 paf 978: for(int row=0; row<size; row++) {
979: source_table.set_current(row);
980:
1.150 paf 981: bool condition=r.process_to_value(vcondition,
1.148 paf 982: false/*don't intercept string*/).as_bool();
983:
984: if(condition) // ...condition is true=
1.182 paf 985: result_table+=source_table[row]; // =green light to go to result
1.148 paf 986: }
987: source_table.set_current(saved_current);
988:
1.182 paf 989: r.write_no_lang(*new VTable(&result_table));
1.148 paf 990: }
991:
1.66 paf 992: // constructor
993:
1.182 paf 994: MTable::MTable(): Methoded("table") {
1.142 paf 995: // ^table::create{data}
996: // ^table::create[nameless]{data}
997: // ^table::create[table]
998: add_native_method("create", Method::CT_DYNAMIC, _create, 1, 2);
999: // old name for compatibility with <= v 1.141 2002/01/25 11:33:45 paf
1000: add_native_method("set", Method::CT_DYNAMIC, _create, 1, 2);
1.2 paf 1001:
1.142 paf 1002: // ^table::load[file]
1003: // ^table::load[nameless;file]
1.168 paf 1004: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 3);
1.22 paf 1005:
1006: // ^table.save[file]
1007: // ^table.save[nameless;file]
1.188 paf 1008: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 3);
1.6 paf 1009:
1010: // ^table.count[]
1.66 paf 1011: add_native_method("count", Method::CT_DYNAMIC, _count, 0, 0);
1.6 paf 1012:
1013: // ^table.line[]
1.66 paf 1014: add_native_method("line", Method::CT_DYNAMIC, _line, 0, 0);
1.6 paf 1015:
1.10 paf 1016: // ^table.offset[]
1.133 paf 1017: // ^table.offset(offset)
1018: // ^table.offset[cur|set](offset)
1019: add_native_method("offset", Method::CT_DYNAMIC, _offset, 0, 2);
1.7 paf 1020:
1.10 paf 1021: // ^table.menu{code}
1022: // ^table.menu{code}[delim]
1.66 paf 1023: add_native_method("menu", Method::CT_DYNAMIC, _menu, 1, 2);
1.74 paf 1024:
1.79 paf 1025: // ^table:hash[key field name]
1.123 parser 1026: // ^table:hash[key field name][value field name(s) string/table]
1.163 paf 1027: add_native_method("hash", Method::CT_DYNAMIC, _hash, 1, 3);
1.32 paf 1028:
1.102 parser 1029: // ^table.sort{string-key-maker} ^table.sort{string-key-maker}[desc|asc]
1030: // ^table.sort(numeric-key-maker) ^table.sort(numeric-key-maker)[desc|asc]
1.66 paf 1031: add_native_method("sort", Method::CT_DYNAMIC, _sort, 1, 2);
1.8 paf 1032:
1.36 paf 1033: // ^table.locate[field;value]
1.176 paf 1034: add_native_method("locate", Method::CT_DYNAMIC, _locate, 1, 3);
1.39 paf 1035:
1036: // ^table.flip[]
1.66 paf 1037: add_native_method("flip", Method::CT_DYNAMIC, _flip, 0, 0);
1.41 paf 1038:
1039: // ^table.append{r{tab}e{tab}c{tab}o{tab}r{tab}d}
1.66 paf 1040: add_native_method("append", Method::CT_DYNAMIC, _append, 1, 1);
1.42 paf 1041:
1.157 paf 1042: // ^table.join[table][$.limit(10) $.offset(1) $.offset[cur] ]
1043: add_native_method("join", Method::CT_DYNAMIC, _join, 1, 2);
1.49 paf 1044:
1045:
1.100 parser 1046: // ^table:sql[query]
1047: // ^table:sql[query][$.limit(1) $.offset(2)]
1048: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.88 parser 1049:
1050: // ^table:columns[]
1051: add_native_method("columns", Method::CT_DYNAMIC, _columns, 0, 0);
1.148 paf 1052:
1053: // ^table.select(expression) = table
1054: add_native_method("select", Method::CT_DYNAMIC, _select, 1, 1);
1.40 paf 1055: }
E-mail:
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to table.C CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [parser3project] / parser3 / src / classes