Annotation of parser3/src/classes/table.C, revision 1.208
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:
1.208 ! paf 8: static const char * const IDENT_TABLE_C="$Date: 2004/12/23 14:51:31 $";
1.1 paf 9:
1.105 parser 10: #include "classes.h"
1.182 paf 11: #include "pa_vmethod_frame.h"
12:
1.16 paf 13: #include "pa_common.h"
1.1 paf 14: #include "pa_request.h"
15: #include "pa_vtable.h"
1.6 paf 16: #include "pa_vint.h"
1.51 paf 17: #include "pa_sql_connection.h"
1.72 paf 18: #include "pa_vbool.h"
1.1 paf 19:
1.66 paf 20: // class
21:
1.182 paf 22: class MTable: public Methoded {
1.66 paf 23: public: // VStateless_class
1.191 paf 24: Value* create_new_value(Pool&) { return new VTable(); }
1.66 paf 25:
26: public:
1.182 paf 27: MTable();
1.70 paf 28:
29: public: // Methoded
1.66 paf 30: bool used_directly() { return true; }
31: };
1.1 paf 32:
1.182 paf 33: // global variable
34:
35: DECLARE_CLASS_VAR(table, new MTable, 0);
36:
37: // defines for globals
38:
1.203 paf 39: #define SQL_BIND_NAME "bind"
1.182 paf 40: #define SQL_LIMIT_NAME "limit"
41: #define SQL_OFFSET_NAME "offset"
42: #define SQL_DEFAULT_NAME "default"
43: #define SQL_DISTINCT_NAME "distinct"
44: #define TABLE_REVERSE_NAME "reverse"
45:
46: // globals
47:
1.203 paf 48: String sql_bind_name(SQL_BIND_NAME);
1.182 paf 49: String sql_limit_name(SQL_LIMIT_NAME);
50: String sql_offset_name(SQL_OFFSET_NAME);
51: String sql_default_name(SQL_DEFAULT_NAME);
52: String sql_distinct_name(SQL_DISTINCT_NAME);
53: String table_reverse_name(TABLE_REVERSE_NAME);
54:
1.186 paf 55: // local defines
56:
1.187 paf 57: #define COLUMN_SEPARATOR_NAME "separator"
58: #define COLUMN_ENCLOSER_NAME "encloser"
1.186 paf 59:
60:
1.1 paf 61: // methods
1.66 paf 62:
1.182 paf 63: static Table::Action_options get_action_options(Request& r, MethodParams& params,
64: const Table& source) {
1.176 paf 65: Table::Action_options result;
1.182 paf 66: if(!params.count())
67: return result;
68:
69: Value& maybe_options=params.last();
70: /* can not do it:
71: want to enable ^table::create[$source;
72: # $.option[]
73: ]
74: but there is ^table.locate[name;value]
1.176 paf 75:
1.182 paf 76: if(maybe_options.is_string()) { // allow empty options
77: result.defined=true;
1.176 paf 78: return result;
1.182 paf 79: }
80: */
81: HashStringValue* options=maybe_options.get_hash();
1.176 paf 82: if(!options)
83: return result;
84:
85: result.defined=true;
86: bool defined_offset=false;
87:
88: int valid_options=0;
1.182 paf 89: if(Value* voffset=options->get(sql_offset_name)) {
1.176 paf 90: valid_options++;
91: defined_offset=true;
92: if(voffset->is_string()) {
1.182 paf 93: const String& soffset=*voffset->get_string();
1.176 paf 94: if(soffset == "cur")
95: result.offset=source.current();
96: else
1.164 paf 97: throw Exception("parser.runtime",
1.176 paf 98: &soffset,
99: "must be 'cur' string or expression");
100: } else
101: result.offset=r.process_to_value(*voffset).as_int();
102: }
1.182 paf 103: if(Value* vlimit=options->get(sql_limit_name)) {
1.176 paf 104: valid_options++;
105: result.limit=r.process_to_value(*vlimit).as_int();
106: }
1.182 paf 107: if(Value *vreverse=(Value *)options->get(table_reverse_name)) {
108: valid_options++;
109: result.reverse=r.process_to_value(*vreverse).as_bool();
110: if(result.reverse && !defined_offset)
111: result.offset=source.count()-1;
112: }
113:
114: if(valid_options!=options->count())
1.176 paf 115: throw Exception("parser.runtime",
1.182 paf 116: 0,
1.176 paf 117: "called with invalid option");
118:
119: return result;
120: }
1.180 paf 121: static void check_option_param(bool options_defined,
1.182 paf 122: MethodParams& params, size_t next_param_index,
1.176 paf 123: const char *msg) {
1.182 paf 124: if(next_param_index+(options_defined?1:0) != params.count())
1.176 paf 125: throw Exception("parser.runtime",
1.182 paf 126: 0,
1.176 paf 127: "%s", msg);
1.157 paf 128: }
129:
1.182 paf 130: static void _create(Request& r, MethodParams& params) {
1.157 paf 131: // clone/copy part?
1.182 paf 132: if(Table *source=params[0].get_table()) {
133: Table::Action_options o=get_action_options(r, params, *source);
134: check_option_param(o.defined, params, 1,
1.176 paf 135: "too many parameters");
1.182 paf 136: GET_SELF(r, VTable).set_table(*new Table(*source, o));
1.157 paf 137: return;
138: }
1.142 paf 139:
1.1 paf 140: // data is last parameter
1.182 paf 141: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
142: const String& data=
143: r.process_to_string(params.as_junction(params.count()-1, "body must be code"));
1.44 paf 144:
145: // parse columns
1.182 paf 146: size_t raw_pos_after=0;
147: Table::columns_type columns;
148: if(params.count()==2) {
149: columns=Table::columns_type(0); // nameless
1.21 paf 150: } else {
1.182 paf 151: columns=Table::columns_type(new ArrayString);
1.44 paf 152:
1.182 paf 153: ArrayString head;
154: data.split(head, raw_pos_after, "\n", String::L_AS_IS, 1);
155: if(head.count()) {
156: size_t col_pos_after=0;
157: head[0]->split(*columns, col_pos_after, "\t", String::L_AS_IS);
158: }
1.44 paf 159: }
160:
1.182 paf 161: Table& table=*new Table(columns);
1.44 paf 162: // parse cells
1.182 paf 163:
164: ArrayString rows;
165: data.split(rows, raw_pos_after, "\n", String::L_AS_IS);
166: Array_iterator<const String*> i(rows);
1.98 parser 167: while(i.has_next()) {
1.182 paf 168: Table::element_type row(new ArrayString);
169: const String& string=*i.next();
1.118 parser 170: // remove comment lines
1.182 paf 171: if(!string.length())
1.44 paf 172: continue;
173:
1.182 paf 174: size_t col_pos_after=0;
175: string.split(*row, col_pos_after, "\t", String::L_AS_IS);
176: table+=row;
1.17 paf 177: }
1.1 paf 178:
1.44 paf 179: // replace any previous table value
1.182 paf 180: GET_SELF(r, VTable).set_table(table);
1.44 paf 181: }
182:
1.187 paf 183: struct lsplit_result {
184: char* piece;
185: char delim;
186:
187: operator bool() { return piece!=0; }
188: };
189:
190: inline lsplit_result lsplit(char* string, char delim1, char delim2) {
191: lsplit_result result;
192: if(string) {
193: char delims[]={delim1, delim2, 0};
194: if(char* v=strpbrk(string, delims)) {
195: result.delim=*v;
196: *v=0;
197: result.piece=v+1;
198: return result;
199: }
200: }
201: result.piece=0;
202: result.delim=0;
203: return result;
204: }
205:
206: inline lsplit_result lsplit(char* *string_ref, char delim1, char delim2) {
207: lsplit_result result;
208: result.piece=*string_ref;
209: lsplit_result next=lsplit(*string_ref, delim1, delim2);
210: result.delim=next.delim;
211: *string_ref=next.piece;
212: return result;
213: }
214:
215: static lsplit_result lsplit(char** string_ref, char delim1, char delim2, char encloser) {
216: lsplit_result result;
217:
218: if(char* string=*string_ref) {
219: if(encloser && *string==encloser) {
220: string++;
221:
222: char *read;
223: char *write;
224: write=read=string;
225: char c;
1.193 paf 226: while((c=*read++)) {
1.187 paf 227: if(c==encloser) {
228: char n=*read;
229: if(n==encloser) // double-encloser stands for encloser
230: read++;
231: else if(n==delim1 || n==delim2) {
232: result.delim=n;
233: read++;
234: break;
235: }
236: }
237:
238: *write++=c;
239: }
240: *write=0; // terminate
241: *string_ref=c? read: 0;
242: result.piece=string;
243: return result;
244: } else
245: return lsplit(string_ref, delim1, delim2);
246: }
247: result.piece=0;
248: return result;
249: }
250:
251: static void skip_empty_and_comment_lines( char** data_ref ) {
252: if(char *data=*data_ref) {
253: while( char c=*data ) {
254: if( c== '\n' || c == '#' ) {
255: /*nowhere=*/getrow(&data); // remove empty&comment lines
1.199 paf 256: if(!(*data_ref=data))
257: break;
1.187 paf 258: continue;
259: }
260: break;
261: }
262: }
263: }
264:
265: struct TableSeparators {
1.206 paf 266: char column; const String* scolumn;
267: char encloser; const String* sencloser;
268:
269: TableSeparators():
270: column('\t'), scolumn(new String("\t", false)),
271: encloser(0), sencloser(0)
272: {}
1.187 paf 273: void load( HashStringValue& options ) {
274: if(Value* vseparator=options.get(COLUMN_SEPARATOR_NAME)) {
275: options.remove(COLUMN_SEPARATOR_NAME);
1.206 paf 276: scolumn=&vseparator->as_string();
277: if(scolumn->length()!=1)
1.187 paf 278: throw Exception("parser.runtime",
1.206 paf 279: scolumn,
1.187 paf 280: "separator must be one character long");
1.206 paf 281: column=scolumn->first_char();
1.187 paf 282: }
283: if(Value* vencloser=options.get(COLUMN_ENCLOSER_NAME)) {
284: options.remove(COLUMN_ENCLOSER_NAME);
1.188 paf 285: sencloser=&vencloser->as_string();
286: if(sencloser->length()!=1)
1.187 paf 287: throw Exception("parser.runtime",
1.188 paf 288: sencloser,
1.187 paf 289: "encloser must be one character long");
1.188 paf 290: encloser=sencloser->first_char();
1.187 paf 291: }
292: }
293: };
294:
1.182 paf 295: static void _load(Request& r, MethodParams& params) {
296: const String& first_param=params.as_string(0, "file name must be string");
1.168 paf 297: int filename_param_index=0;
298: bool nameless=first_param=="nameless";
299: if(nameless)
300: filename_param_index++;
1.182 paf 301: size_t options_param_index=filename_param_index+1;
1.186 paf 302:
303: HashStringValue *options=0;
1.187 paf 304: TableSeparators separators;
1.186 paf 305: if(options_param_index<params.count()
306: && (options=params.as_no_junction(options_param_index, "additional params must be hash").get_hash())) {
307: // cloning, so that we could change [to simplify checks on params inside file_read_text
308: options=new HashStringValue(*options);
1.187 paf 309: separators.load(*options);
1.186 paf 310: }
311:
1.44 paf 312: // loading text
1.182 paf 313: char *data=file_read_text(r.charsets,
314: r.absolute(params.as_string(filename_param_index, "file name must be string")),
1.168 paf 315: true,
1.186 paf 316: options
1.168 paf 317: );
1.44 paf 318:
1.1 paf 319: // parse columns
1.182 paf 320: Table::columns_type columns;
1.168 paf 321: if(nameless) {
1.182 paf 322: columns=Table::columns_type(0); // nameless
1.1 paf 323: } else {
1.182 paf 324: columns=Table::columns_type(new ArrayString);
1.1 paf 325:
1.187 paf 326: skip_empty_and_comment_lines(&data);
327: while( lsplit_result sr=lsplit(&data, separators.column, '\n', separators.encloser) ) {
328: *columns+=new String(sr.piece, 0, true);
329: if(sr.delim=='\n')
330: break;
1.139 paf 331: }
1.1 paf 332: }
1.187 paf 333:
334: Table& table=*new Table(columns);
1.1 paf 335:
336: // parse cells
1.187 paf 337: Table::element_type row(new ArrayString);
338: skip_empty_and_comment_lines(&data);
339: while( lsplit_result sr=lsplit(&data, separators.column, '\n', separators.encloser) ) {
1.201 paf 340: if(!*sr.piece && !sr.delim && !row->count()) // append last empty column [if without \n]
341: break;
1.187 paf 342: *row+=new String(sr.piece, 0, true);
343: if(sr.delim=='\n') {
344: table+=row;
345: row=new ArrayString;
346: skip_empty_and_comment_lines(&data);
1.1 paf 347: }
1.187 paf 348: }
349: // last line [if without \n]
350: if(row->count())
1.1 paf 351: table+=row;
1.187 paf 352:
1.1 paf 353: // replace any previous table value
1.182 paf 354: GET_SELF(r, VTable).set_table(table);
1.1 paf 355: }
1.2 paf 356:
1.188 paf 357: static void maybe_enclose( String& to, const String& from, char encloser, const String* sencloser ) {
358: if(encloser) {
359: to<<*sencloser;
360: // while we have 'encloser'...
1.189 paf 361: size_t pos_after=0;
362: for( size_t pos_before; (pos_before=from.pos( encloser, pos_after ))!=STRING_NOT_FOUND; pos_after=pos_before+1) {
1.188 paf 363: to<<from.mid(pos_before+1/*+found encloser*/, pos_after-pos_before);
364: to<<*sencloser; // doubling encloser
365: }
366: // last piece
367: size_t from_length=from.length();
368: if(pos_after<from_length)
369: to<<from.mid(pos_after, from_length);
370:
371: to<<*sencloser;
372: } else
1.202 paf 373: to<<from;
1.188 paf 374: }
375:
376:
1.182 paf 377: static void _save(Request& r, MethodParams& params) {
1.188 paf 378: const String& first_arg=params.as_string(0, "first argument must not be code");
379: size_t param_index=1;
380:
381: bool do_append=false;
382: bool output_column_names=true;
383:
384: // mode?
385: if(first_arg=="append")
386: do_append=true;
387: else if(first_arg=="nameless")
388: output_column_names=false;
389: else
390: --param_index;
391:
392: const String& file_name=params.as_string(param_index++, "file name must not be code");
393:
394: TableSeparators separators;
395: if(param_index<params.count()) {
396: if(HashStringValue *options=params.as_no_junction(param_index++, "additional params must be hash").get_hash()) {
397: separators.load(*options);
398: if(options->count())
399: throw Exception("parser.runtime",
400: 0,
401: "invalid option passed");
402: } else
403: throw Exception("parser.runtime",
404: 0,
405: "additional params must be hash (did you spell mode parameter correctly?)");
406:
407: }
408: if(param_index<params.count())
409: throw Exception("parser.runtime",
410: 0,
411: "bad mode (must be nameless or append)");
1.22 paf 412:
1.182 paf 413: Table& table=GET_SELF(r, VTable).table();
1.31 paf 414:
1.182 paf 415: String sdata;
1.188 paf 416: if(output_column_names) {
1.31 paf 417: if(table.columns()) { // named table
1.182 paf 418: for(Array_iterator<const String*> i(*table.columns()); i.has_next(); ) {
1.188 paf 419: maybe_enclose( sdata, *i.next(), separators.encloser, separators.sencloser );
1.98 parser 420: if(i.has_next())
1.206 paf 421: sdata<<*separators.scolumn;
1.31 paf 422: }
1.188 paf 423: } else { // nameless table [we were asked to output column names]
1.182 paf 424: if(int lsize=table.count()?table[0]->count():0)
1.31 paf 425: for(int column=0; column<lsize; column++) {
1.182 paf 426: char *cindex_tab=new(PointerFreeGC) char[MAX_NUMBER];
427: sdata.append_know_length(cindex_tab,
1.185 paf 428: snprintf(cindex_tab, MAX_NUMBER,
1.206 paf 429: column<lsize-1?"%d%c":"%d", column, separators.column),
1.185 paf 430: String::L_CLEAN);
1.31 paf 431: }
432: else
1.182 paf 433: sdata.append_help_length("empty nameless table", 0, String::L_CLEAN);
1.31 paf 434: }
1.182 paf 435: sdata.append_know_length("\n", 1, String::L_CLEAN);
1.188 paf 436: }
1.129 paf 437:
1.31 paf 438: // data lines
1.182 paf 439: Array_iterator<ArrayString*> i(table);
1.98 parser 440: while(i.has_next()) {
1.182 paf 441: for(Array_iterator<const String*> c(*i.next()); c.has_next(); ) {
1.188 paf 442: maybe_enclose( sdata, *c.next(), separators.encloser, separators.sencloser );
1.98 parser 443: if(c.has_next())
1.206 paf 444: sdata<<*separators.scolumn;
1.31 paf 445: }
1.182 paf 446: sdata.append_know_length("\n", 1, String::L_CLEAN);
1.31 paf 447: }
448:
449: // write
1.188 paf 450: file_write(r.absolute(file_name),
1.182 paf 451: sdata.cstr(), sdata.length(), true, do_append);
1.22 paf 452: }
453:
1.182 paf 454: static void _count(Request& r, MethodParams&) {
455: int result=GET_SELF(r, VTable).table().count();
456: r.write_no_lang(*new VInt(result));
1.6 paf 457: }
458:
1.182 paf 459: static void _line(Request& r, MethodParams&) {
460: int result=1+GET_SELF(r, VTable).table().current();
461: r.write_no_lang(*new VInt(result));
1.6 paf 462: }
463:
1.182 paf 464: static void _offset(Request& r, MethodParams& params) {
465: Table& table=GET_SELF(r, VTable).table();
466: if(params.count()) {
1.133 paf 467: bool absolute=false;
1.182 paf 468: if(params.count()>1) {
469: const String& whence=params.as_string(0, "whence must be string");
1.133 paf 470: if(whence=="cur")
1.134 paf 471: absolute=false;
1.133 paf 472: else if(whence=="set")
1.134 paf 473: absolute=true;
1.133 paf 474: else
1.146 paf 475: throw Exception("parser.runtime",
1.134 paf 476: &whence,
477: "is invalid whence, valid are 'cur' or 'set'");
1.157 paf 478: }
1.133 paf 479:
1.182 paf 480: Value& offset_expr=params.as_junction(params.count()-1, "offset must be expression");
1.147 paf 481: table.offset(absolute, r.process_to_value(offset_expr).as_int());
1.151 paf 482: } else
1.182 paf 483: r.write_no_lang(*new VInt(table.current()));
1.6 paf 484: }
485:
1.182 paf 486: static void _menu(Request& r, MethodParams& params) {
487: Value& body_code=params.as_junction(0, "body must be code");
1.7 paf 488:
1.182 paf 489: Value* delim_maybe_code=params.count()>1?¶ms[1]:0;
1.7 paf 490:
1.182 paf 491: Table& table=GET_SELF(r, VTable).table();
1.7 paf 492: bool need_delim=false;
1.99 parser 493: int saved_current=table.current();
1.182 paf 494: int size=table.count();
1.99 parser 495: for(int row=0; row<size; row++) {
1.22 paf 496: table.set_current(row);
1.7 paf 497:
1.161 paf 498: StringOrValue sv_processed=r.process(body_code);
1.182 paf 499: const String* s_processed=sv_processed.get_string();
500: if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
1.161 paf 501: if(need_delim) // need delim & iteration produced string?
1.150 paf 502: r.write_pass_lang(r.process(*delim_maybe_code));
1.7 paf 503: need_delim=true;
504: }
1.161 paf 505: r.write_pass_lang(sv_processed);
1.7 paf 506: }
1.99 parser 507: table.set_current(saved_current);
1.7 paf 508: }
509:
1.110 parser 510: #ifndef DOXYGEN
1.174 paf 511: enum Table2hash_distint { D_ILLEGAL, D_FIRST, D_TABLES };
1.74 paf 512: struct Row_info {
1.166 paf 513: Request *r;
1.74 paf 514: Table *table;
1.182 paf 515: Value* key_code;
516: size_t key_field;
517: Array<int>* value_fields;
518: HashStringValue* hash;
1.174 paf 519: Table2hash_distint distinct;
1.182 paf 520: size_t row;
1.74 paf 521: };
1.110 parser 522: #endif
1.182 paf 523: static void table_row_to_hash(Table::element_type row, Row_info *info) {
524: const String* key;
525: if(info->key_code) {
526: info->table->set_current(info->row++); // change context row
527: StringOrValue sv_processed=info->r->process(*info->key_code);
1.166 paf 528: key=&sv_processed.as_string();
529: } else
1.182 paf 530: key=info->key_field<row->count()?row->get(info->key_field):0;
1.166 paf 531:
532: if(!key)
533: return; // ignore rows without key [too-short-record_array if-indexed]
1.74 paf 534:
1.182 paf 535: switch(info->distinct) {
1.174 paf 536: case D_ILLEGAL: case D_FIRST:
537: {
1.182 paf 538: VHash* vhash=new VHash;
539: HashStringValue& hash=vhash->hash();
540: for(Array_iterator<int> i(*info->value_fields); i.has_next(); ) {
541: size_t value_field=i.next();
542: if(value_field<row->count())
1.174 paf 543: hash.put(
1.182 paf 544: *info->table->columns()->get(value_field),
545: new VString(*row->get(value_field)));
1.174 paf 546: }
547:
1.182 paf 548: if(info->hash->put_dont_replace(*key, vhash)) // put. existed?
549: if(info->distinct==D_ILLEGAL)
1.174 paf 550: throw Exception("parser.runtime",
551: key,
552: "duplicate key");
553: }
554: break;
555: case D_TABLES:
556: {
1.182 paf 557: VTable* vtable=(VTable*)info->hash->get(*key); // put. table existed?
1.174 paf 558: Table* table;
559: if(vtable)
560: table=vtable->get_table();
561: else {
562: // no? creating table of same structure as source
1.179 paf 563: Table::Action_options table_options(0, 0);
1.182 paf 564: table=new Table(*info->table, table_options/*no rows, just structure*/);
565: info->hash->put(*key, new VTable(table));
1.174 paf 566: }
1.182 paf 567: *table+=row;
1.174 paf 568: }
569: break;
570: default:
571: throw Exception(0,
572: 0,
1.182 paf 573: "invalid distinct code (#%d)", info->distinct);
1.74 paf 574: }
575: }
1.182 paf 576: static void _hash(Request& r, MethodParams& params) {
577: Table& self_table=GET_SELF(r, VTable).table();
578: VHash& result=*new VHash;
579: if(Table::columns_type columns=self_table.columns())
580: if(columns->count()>0) {
1.174 paf 581: Table2hash_distint distinct=D_ILLEGAL;
1.182 paf 582: int param_index=params.count()-1;
1.166 paf 583: if(param_index>0) {
1.182 paf 584: if(HashStringValue* options=
585: params.as_no_junction(param_index, "param must not be code").get_hash()) {
1.166 paf 586: --param_index;
587: int valid_options=0;
1.182 paf 588: if(Value* vdistinct_code=options->get(sql_distinct_name)) {
1.166 paf 589: valid_options++;
1.174 paf 590: Value& vdistinct_value=r.process_to_value(*vdistinct_code);
591: if(vdistinct_value.is_string()) {
592: const String& sdistinct=*vdistinct_value.get_string();
593: if(sdistinct=="tables")
594: distinct=D_TABLES;
595: else
596: throw Exception("parser.runtime",
597: &sdistinct,
598: "must be 'tables' or true/false");
599: } else
600: distinct=vdistinct_value.as_bool()?D_FIRST:D_ILLEGAL;
1.166 paf 601: }
1.182 paf 602: if(valid_options!=options->count())
1.166 paf 603: throw Exception("parser.runtime",
1.182 paf 604: 0,
1.166 paf 605: "called with invalid option");
1.163 paf 606: }
607: }
608: if(param_index==2) // bad options param type
609: throw Exception("parser.runtime",
1.182 paf 610: 0,
1.163 paf 611: "options must be hash");
612:
1.182 paf 613: Array<int> value_fields;
1.163 paf 614: if(param_index>0) {
1.174 paf 615: if(distinct!=D_ILLEGAL && distinct!=D_FIRST)
616: throw Exception("parser.runtime",
617: 0,
618: "in distinct[tables] mode you may not specify value field(s)");
1.182 paf 619: Value& value_fields_param=params.as_no_junction(param_index, "value field(s) must not be code");
1.123 parser 620: if(value_fields_param.is_string()) {
1.182 paf 621: value_fields+=self_table.column_name2index(
622: *value_fields_param.get_string(), true);
623: } else if(Table* value_fields_table=value_fields_param.get_table()) {
624: for(Array_iterator<Table::element_type> i(*value_fields_table);
625: i.has_next(); ) {
626: const String& value_field_name
627: =*i.next()->get(0);
628: value_fields
629: +=self_table.column_name2index(value_field_name, true);
1.123 parser 630: }
631: } else
1.146 paf 632: throw Exception("parser.runtime",
1.182 paf 633: 0,
1.197 paf 634: "value field(s) must be string or table"
1.123 parser 635: );
636: } else { // by all columns, including key
1.174 paf 637: if(!(distinct!=D_ILLEGAL && distinct!=D_FIRST))
1.182 paf 638: for(size_t i=0; i<columns->count(); i++)
1.174 paf 639: value_fields+=i;
1.74 paf 640: }
641:
1.182 paf 642:
643: {
644: Value* key_param=¶ms[0];
1.193 paf 645: Row_info info={
646: &r,
647: &self_table,
648: /*key_code=*/key_param->get_junction()?key_param:0,
1.197 paf 649: /*key_field=*/0/*filled below*/,
1.193 paf 650: &value_fields,
651: &result.hash(),
652: distinct,
653: /*row=*/0
654: };
1.195 paf 655: info.key_field=(info.key_code?-1
656: :self_table.column_name2index(key_param->as_string(), true));
1.182 paf 657:
658: int saved_current=self_table.current();
659: self_table.for_each(table_row_to_hash, &info);
660: self_table.set_current(saved_current);
1.207 paf 661:
662: result.extract_default();
1.182 paf 663: }
1.74 paf 664: }
1.97 parser 665: r.write_no_lang(result);
1.74 paf 666: }
667:
1.110 parser 668: #ifndef DOXYGEN
1.78 paf 669: struct Table_seq_item {
1.182 paf 670: ArrayString* row;
1.34 paf 671: union {
1.182 paf 672: const char *c_str;
1.34 paf 673: double d;
674: } value;
1.32 paf 675: };
1.110 parser 676: #endif
1.34 paf 677: static int sort_cmp_string(const void *a, const void *b) {
678: return strcmp(
1.78 paf 679: static_cast<const Table_seq_item *>(a)->value.c_str,
680: static_cast<const Table_seq_item *>(b)->value.c_str
1.34 paf 681: );
682: }
683: static int sort_cmp_double(const void *a, const void *b) {
1.78 paf 684: double va=static_cast<const Table_seq_item *>(a)->value.d;
685: double vb=static_cast<const Table_seq_item *>(b)->value.d;
1.34 paf 686: if(va<vb)
687: return -1;
688: else if(va>vb)
689: return +1;
690: else
691: return 0;
692: }
1.182 paf 693: static void _sort(Request& r, MethodParams& params) {
694: Value& key_maker=params.as_junction(0, "key-maker must be code");
1.61 paf 695:
1.182 paf 696: bool reverse=params.count()>1/*..[desc|asc|]*/?
697: reverse=params.as_no_junction(1, "order must not be code").as_string()=="desc":
1.104 parser 698: false; // default=asc
1.32 paf 699:
1.182 paf 700: Table& old_table=GET_SELF(r, VTable).table();
701: Table& new_table=*new Table(old_table.columns());
1.34 paf 702:
1.182 paf 703: Table_seq_item* seq=new(PointerFreeGC) Table_seq_item[old_table.count()];
1.34 paf 704: int i;
705:
706: // calculate key values
707: bool key_values_are_strings=true;
1.182 paf 708: int old_count=old_table.count();
709: for(i=0; i<old_count; i++) {
1.101 parser 710: old_table.set_current(i);
1.32 paf 711: // calculate key value
1.182 paf 712: seq[i].row=old_table[i];
713: Value& value=r.process_to_value(key_maker).as_expr_result(true/*return string as-is*/);
1.34 paf 714: if(i==0) // determining key values type by first one
715: key_values_are_strings=value.is_string();
716:
717: if(key_values_are_strings)
718: seq[i].value.c_str=value.as_string().cstr();
719: else
720: seq[i].value.d=value.as_double();
1.32 paf 721: }
722: // sort keys
1.182 paf 723: _qsort(seq, old_count, sizeof(Table_seq_item),
1.34 paf 724: key_values_are_strings?sort_cmp_string:sort_cmp_double);
1.32 paf 725:
1.34 paf 726: // reorder table as they require in 'seq'
1.182 paf 727: for(i=0; i<old_count; i++)
728: new_table+=Table::element_type(seq[reverse?old_count-1-i:i].row);
729:
730: delete[] seq;
1.32 paf 731:
1.116 parser 732: // replace any previous table value
1.182 paf 733: GET_SELF(r, VTable).set_table(new_table);
1.32 paf 734: }
735:
1.176 paf 736: #ifndef DOXYGEN
1.182 paf 737: struct Expression_is_true_info {
1.176 paf 738: Request* r;
739: Value* expression_code;
740: };
741: #endif
1.191 paf 742: static bool expression_is_true(Table&, Expression_is_true_info* info) {
743: return info->r->process_to_value(*info->expression_code).as_bool();
1.176 paf 744: }
745: static bool _locate_expression(Table& table, Table::Action_options o,
1.182 paf 746: Request& r, MethodParams& params) {
747: check_option_param(o.defined, params, 1,
1.176 paf 748: "locate by expression only has parameters: expression and, maybe, options");
1.182 paf 749: Value& expression_code=params.as_junction(0, "must be expression");
1.145 paf 750:
1.182 paf 751: Expression_is_true_info info={&r, &expression_code};
752: return table.table_first_that(expression_is_true, &info, o);
1.145 paf 753: }
1.176 paf 754: static bool _locate_name_value(Table& table, Table::Action_options o,
1.191 paf 755: Request&, MethodParams& params) {
1.182 paf 756: check_option_param(o.defined, params, 2,
1.176 paf 757: "locate by locate by name has parameters: name, value and, maybe, options");
1.182 paf 758: const String& name=params.as_string(0, "column name must be string");
759: const String& value=params.as_string(1, "value must be string");
760: return table.locate(name, value, o);
761: }
762: static void _locate(Request& r, MethodParams& params) {
763: Table& table=GET_SELF(r, VTable).table();
1.72 paf 764:
1.182 paf 765: Table::Action_options o=get_action_options(r, params, table);
766:
767: bool result=params[0].get_junction()?
768: _locate_expression(table, o, r, params) :
769: _locate_name_value(table, o, r, params);
770: r.write_no_lang(*new VBool(result));
1.145 paf 771: }
1.182 paf 772:
773:
1.191 paf 774: static void _flip(Request& r, MethodParams&) {
1.182 paf 775: Table& old_table=GET_SELF(r, VTable).table();
1.184 paf 776: Table& new_table=*new Table(0);
1.182 paf 777: if(size_t old_count=old_table.count())
778: if(size_t old_cols=old_table[0]->count())
779: for(size_t column=0; column<old_cols; column++) {
780: Table::element_type new_row(new ArrayString(old_count));
781: for(size_t i=0; i<old_count; i++) {
782: Table::element_type old_row=old_table[i];
783: *new_row+=column<old_row->count()?old_row->get(column):new String;
1.39 paf 784: }
1.182 paf 785: new_table+=new_row;
1.39 paf 786: }
787:
1.182 paf 788: r.write_no_lang(*new VTable(&new_table));
1.39 paf 789: }
790:
1.182 paf 791: static void _append(Request& r, MethodParams& params) {
1.134 paf 792: // data
1.182 paf 793: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
794: const String& string=r.process_to_string(params.as_junction(0, "body must be code"));
1.41 paf 795:
796: // parse cells
1.182 paf 797: Table::element_type row=new ArrayString;
798: size_t pos_after=0;
799: string.split(*row, pos_after, "\t", String::L_AS_IS);
1.41 paf 800:
1.182 paf 801: GET_SELF(r, VTable).table()+=row;
1.41 paf 802: }
803:
1.182 paf 804: static void join_named_row(Table& src, Table* dest) {
805: Table::columns_type dest_columns=dest->columns();
806: size_t dest_columns_count=dest_columns->count();
807: Table::element_type dest_row(new ArrayString(dest_columns_count));
808: for(size_t dest_column=0; dest_column<dest_columns_count; dest_column++) {
809: const String* src_item=src.item(*dest_columns->get(dest_column));
810: *dest_row+=src_item?src_item:new String;
811: }
812: *dest+=dest_row;
813: }
814: static void join_nameless_row(Table& src, Table* dest) {
815: *dest+=src[src.current()];
816: }
817: static void _join(Request& r, MethodParams& params) {
818: Table* maybe_src=params.as_no_junction(0, "table ref must not be code").get_table();
1.42 paf 819: if(!maybe_src)
1.146 paf 820: throw Exception("parser.runtime",
1.182 paf 821: 0,
1.42 paf 822: "source is not a table");
1.176 paf 823: Table& src=*maybe_src;
824:
1.182 paf 825: Table::Action_options o=get_action_options(r, params, src);
826: check_option_param(o.defined, params, 1,
1.176 paf 827: "invalid extra parameter");
1.42 paf 828:
1.182 paf 829: Table& dest=GET_SELF(r, VTable).table();
1.42 paf 830: if(&src == &dest)
1.146 paf 831: throw Exception("parser.runtime",
1.182 paf 832: 0,
1.42 paf 833: "source and destination are same table");
834:
1.193 paf 835: if(dest.columns()) // dest is named
1.182 paf 836: src.table_for_each(join_named_row, &dest, o);
837: else // dest is nameless
838: src.table_for_each(join_nameless_row, &dest, o);
1.42 paf 839: }
840:
1.94 parser 841: #ifndef DOXYGEN
1.169 paf 842: class Table_sql_event_handlers: public SQL_Driver_query_event_handlers {
1.182 paf 843: ArrayString& columns;
844: ArrayString* row;
1.94 parser 845: public:
1.182 paf 846: Table* table;
847: public:
848: Table_sql_event_handlers() :
849: columns(*new ArrayString), row(0), table(0) {
1.94 parser 850: }
851:
1.182 paf 852: bool add_column(SQL_Error& error, const char *str, size_t length) {
1.170 paf 853: try {
1.182 paf 854: columns+=new String(str, length, true);
1.170 paf 855: return false;
856: } catch(...) {
857: error=SQL_Error("exception occured in Table_sql_event_handlers::add_column");
858: return true;
859: }
860: }
861: bool before_rows(SQL_Error& error) {
862: try {
1.182 paf 863: table=new Table(&columns);
1.170 paf 864: return false;
865: } catch(...) {
866: error=SQL_Error("exception occured in Table_sql_event_handlers::before_rows");
867: return true;
868: }
869: }
870: bool add_row(SQL_Error& error) {
871: try {
1.182 paf 872: *table+=row=new ArrayString;
1.170 paf 873: return false;
874: } catch(...) {
875: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row");
876: return true;
877: }
878: }
1.182 paf 879: bool add_row_cell(SQL_Error& error, const char* str, size_t length) {
1.170 paf 880: try {
1.182 paf 881: String& cell=*new String;
882: if(length)
883: cell.append_know_length(str, length, String::L_TAINTED);
884: *row+=&cell;
1.170 paf 885: return false;
886: } catch(...) {
887: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row_cell");
888: return true;
889: }
1.94 parser 890: }
891: };
892: #endif
1.204 paf 893:
894: static void marshal_bind(
895: HashStringValue::key_type aname,
896: HashStringValue::value_type avalue,
897: SQL_Driver::Placeholder** pptr)
898: {
899: SQL_Driver::Placeholder& ph=**pptr;
900: ph.name=aname.cstr();
1.205 paf 901: ph.value=avalue->as_string().cstr(String::L_UNSPECIFIED);
1.204 paf 902: ph.is_null=avalue->get_class()==void_class;
903: ph.were_updated=false;
904:
905: (*pptr)++;
906: }
907:
908: // not static, used elsewhere
909: int marshal_binds(HashStringValue& hash, SQL_Driver::Placeholder*& placeholders) {
910: int hash_count=hash.count();
911: placeholders=new(UseGC) SQL_Driver::Placeholder[hash_count];
912: SQL_Driver::Placeholder* ptr=placeholders;
913: hash.for_each(marshal_bind, &ptr);
914: return hash_count;
915: }
916:
917: // not static, used elsewhere
918: void unmarshal_bind_updates(HashStringValue& hash, int placeholder_count, SQL_Driver::Placeholder* placeholders) {
919: SQL_Driver::Placeholder* ph=placeholders;
920: for(int i=0; i<placeholder_count; i++, ph++)
921: if(ph->were_updated) {
922: Value* value;
923: if(ph->is_null)
924: value=new VVoid();
925: else
926: if(ph->value)
927: value=new VString(*new String(ph->value, 0, true/*tainted*/));
928: else
929: value=new VString(*new String());
930: hash.put(ph->name, value);
931: }
932: }
933:
1.182 paf 934: static void _sql(Request& r, MethodParams& params) {
935: Value& statement=params.as_junction(0, "statement must be code");
1.49 paf 936:
1.204 paf 937: HashStringValue* bind=0;
1.53 paf 938: ulong limit=0;
1.100 parser 939: ulong offset=0;
1.182 paf 940: if(params.count()>1) {
941: Value& voptions=params.as_no_junction(1, "options must be hash, not code");
1.156 paf 942: if(!voptions.is_string())
1.182 paf 943: if(HashStringValue* options=voptions.get_hash()) {
1.164 paf 944: int valid_options=0;
1.204 paf 945: if(Value* vbind=options->get(sql_bind_name)) {
946: valid_options++;
947: bind=vbind->get_hash();
948: }
1.182 paf 949: if(Value* vlimit=options->get(sql_limit_name)) {
1.164 paf 950: valid_options++;
1.147 paf 951: limit=(ulong)r.process_to_value(*vlimit).as_double();
1.164 paf 952: }
1.182 paf 953: if(Value* voffset=options->get(sql_offset_name)) {
1.164 paf 954: valid_options++;
1.147 paf 955: offset=(ulong)r.process_to_value(*voffset).as_double();
1.164 paf 956: }
1.182 paf 957: if(valid_options!=options->count())
1.164 paf 958: throw Exception("parser.runtime",
1.182 paf 959: 0,
1.164 paf 960: "called with invalid option");
1.109 parser 961: } else
1.146 paf 962: throw Exception("parser.runtime",
1.182 paf 963: 0,
1.109 parser 964: "options must be hash");
1.49 paf 965: }
966:
1.204 paf 967: SQL_Driver::Placeholder* placeholders=0;
968: uint placeholders_count=0;
969: if(bind)
970: placeholders_count=marshal_binds(*bind, placeholders);
971:
1.182 paf 972: Temp_lang temp_lang(r, String::L_SQL);
973: const String& statement_string=r.process_to_string(statement);
974: const char* statement_cstr=
975: statement_string.cstr(String::L_UNSPECIFIED, r.connection());
976: Table_sql_event_handlers handlers;
1.135 paf 977: #ifdef RESOURCES_DEBUG
978: struct timeval mt[2];
979: //measure:before
980: gettimeofday(&mt[0],NULL);
981: #endif
1.182 paf 982: r.connection()->query(
1.203 paf 983: statement_cstr,
1.208 ! paf 984: placeholders_count, placeholders,
1.203 paf 985: offset, limit,
1.160 paf 986: handlers,
987: statement_string);
1.135 paf 988:
989: #ifdef RESOURCES_DEBUG
990: //measure:after connect
991: gettimeofday(&mt[1],NULL);
992:
993: double t[2];
994: for(int i=0;i<2;i++)
995: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
996:
997: r.sql_request_time+=t[1]-t[0];
998: #endif
1.204 paf 999:
1000: if(bind)
1001: unmarshal_bind_updates(*bind, placeholders_count, placeholders);
1.96 parser 1002:
1.182 paf 1003: Table& result=
1004: handlers.table?*handlers.table: // query resulted in table? return it
1005: *new Table(Table::columns_type(0)); // query returned no table, fake it
1.49 paf 1006:
1007: // replace any previous table value
1.182 paf 1008: GET_SELF(r, VTable).set_table(result);
1.49 paf 1009: }
1010:
1.182 paf 1011: static void _columns(Request& r, MethodParams&) {
1.88 parser 1012:
1.182 paf 1013: Table::columns_type result_columns(new ArrayString);
1014: *result_columns+=new String("column");
1015: Table& result_table=*new Table(result_columns);
1.88 parser 1016:
1.182 paf 1017: Table& source_table=GET_SELF(r, VTable).table();
1018: if(Table::columns_type source_columns=source_table.columns()) {
1019: for(Array_iterator<const String*> i(*source_columns); i.has_next(); ) {
1020: Table::element_type result_row(new ArrayString);
1021: *result_row+=i.next();
1022: result_table+=result_row;
1.88 parser 1023: }
1024: }
1025:
1.182 paf 1026: r.write_no_lang(*new VTable(&result_table));
1.88 parser 1027: }
1028:
1.182 paf 1029: static void _select(Request& r, MethodParams& params) {
1030: Value& vcondition=params.as_junction(0, "condition must be expression");
1.148 paf 1031:
1.182 paf 1032: Table& source_table=GET_SELF(r, VTable).table();
1033: Table& result_table=*new Table(source_table.columns());
1.148 paf 1034:
1035: int saved_current=source_table.current();
1.182 paf 1036: int size=source_table.count();
1.148 paf 1037: for(int row=0; row<size; row++) {
1038: source_table.set_current(row);
1039:
1.150 paf 1040: bool condition=r.process_to_value(vcondition,
1.148 paf 1041: false/*don't intercept string*/).as_bool();
1042:
1043: if(condition) // ...condition is true=
1.182 paf 1044: result_table+=source_table[row]; // =green light to go to result
1.148 paf 1045: }
1046: source_table.set_current(saved_current);
1047:
1.182 paf 1048: r.write_no_lang(*new VTable(&result_table));
1.148 paf 1049: }
1050:
1.66 paf 1051: // constructor
1052:
1.182 paf 1053: MTable::MTable(): Methoded("table") {
1.142 paf 1054: // ^table::create{data}
1055: // ^table::create[nameless]{data}
1056: // ^table::create[table]
1057: add_native_method("create", Method::CT_DYNAMIC, _create, 1, 2);
1058: // old name for compatibility with <= v 1.141 2002/01/25 11:33:45 paf
1059: add_native_method("set", Method::CT_DYNAMIC, _create, 1, 2);
1.2 paf 1060:
1.142 paf 1061: // ^table::load[file]
1062: // ^table::load[nameless;file]
1.168 paf 1063: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 3);
1.22 paf 1064:
1065: // ^table.save[file]
1066: // ^table.save[nameless;file]
1.188 paf 1067: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 3);
1.6 paf 1068:
1069: // ^table.count[]
1.66 paf 1070: add_native_method("count", Method::CT_DYNAMIC, _count, 0, 0);
1.6 paf 1071:
1072: // ^table.line[]
1.66 paf 1073: add_native_method("line", Method::CT_DYNAMIC, _line, 0, 0);
1.6 paf 1074:
1.10 paf 1075: // ^table.offset[]
1.133 paf 1076: // ^table.offset(offset)
1077: // ^table.offset[cur|set](offset)
1078: add_native_method("offset", Method::CT_DYNAMIC, _offset, 0, 2);
1.7 paf 1079:
1.10 paf 1080: // ^table.menu{code}
1081: // ^table.menu{code}[delim]
1.66 paf 1082: add_native_method("menu", Method::CT_DYNAMIC, _menu, 1, 2);
1.74 paf 1083:
1.79 paf 1084: // ^table:hash[key field name]
1.123 parser 1085: // ^table:hash[key field name][value field name(s) string/table]
1.163 paf 1086: add_native_method("hash", Method::CT_DYNAMIC, _hash, 1, 3);
1.32 paf 1087:
1.102 parser 1088: // ^table.sort{string-key-maker} ^table.sort{string-key-maker}[desc|asc]
1089: // ^table.sort(numeric-key-maker) ^table.sort(numeric-key-maker)[desc|asc]
1.66 paf 1090: add_native_method("sort", Method::CT_DYNAMIC, _sort, 1, 2);
1.8 paf 1091:
1.36 paf 1092: // ^table.locate[field;value]
1.176 paf 1093: add_native_method("locate", Method::CT_DYNAMIC, _locate, 1, 3);
1.39 paf 1094:
1095: // ^table.flip[]
1.66 paf 1096: add_native_method("flip", Method::CT_DYNAMIC, _flip, 0, 0);
1.41 paf 1097:
1098: // ^table.append{r{tab}e{tab}c{tab}o{tab}r{tab}d}
1.66 paf 1099: add_native_method("append", Method::CT_DYNAMIC, _append, 1, 1);
1.42 paf 1100:
1.157 paf 1101: // ^table.join[table][$.limit(10) $.offset(1) $.offset[cur] ]
1102: add_native_method("join", Method::CT_DYNAMIC, _join, 1, 2);
1.49 paf 1103:
1104:
1.100 parser 1105: // ^table:sql[query]
1106: // ^table:sql[query][$.limit(1) $.offset(2)]
1107: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.88 parser 1108:
1109: // ^table:columns[]
1110: add_native_method("columns", Method::CT_DYNAMIC, _columns, 0, 0);
1.148 paf 1111:
1112: // ^table.select(expression) = table
1113: add_native_method("select", Method::CT_DYNAMIC, _select, 1, 1);
1.40 paf 1114: }
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