Annotation of parser3/src/classes/table.C, revision 1.212
1.20 paf 1: /** @file
1.47 paf 2: Parser: @b table parser class.
1.20 paf 3:
1.210 paf 4: Copyright (c) 2001-2005 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:
1.212 ! paf 8: static const char * const IDENT_TABLE_C="$Date: 2005/08/26 11:12:45 $";
1.1 paf 9:
1.105 parser 10: #include "classes.h"
1.182 paf 11: #include "pa_vmethod_frame.h"
12:
1.16 paf 13: #include "pa_common.h"
1.1 paf 14: #include "pa_request.h"
15: #include "pa_vtable.h"
1.6 paf 16: #include "pa_vint.h"
1.51 paf 17: #include "pa_sql_connection.h"
1.72 paf 18: #include "pa_vbool.h"
1.1 paf 19:
1.66 paf 20: // class
21:
1.182 paf 22: class MTable: public Methoded {
1.66 paf 23: public: // VStateless_class
1.209 paf 24: Value* create_new_value(Pool&, HashStringValue&) { return new VTable(); }
1.66 paf 25:
26: public:
1.182 paf 27: MTable();
1.70 paf 28:
29: public: // Methoded
1.66 paf 30: bool used_directly() { return true; }
31: };
1.1 paf 32:
1.182 paf 33: // global variable
34:
35: DECLARE_CLASS_VAR(table, new MTable, 0);
36:
37: // defines for globals
38:
1.203 paf 39: #define SQL_BIND_NAME "bind"
1.182 paf 40: #define SQL_LIMIT_NAME "limit"
41: #define SQL_OFFSET_NAME "offset"
42: #define SQL_DEFAULT_NAME "default"
43: #define SQL_DISTINCT_NAME "distinct"
44: #define TABLE_REVERSE_NAME "reverse"
45:
46: // globals
47:
1.203 paf 48: String sql_bind_name(SQL_BIND_NAME);
1.182 paf 49: String sql_limit_name(SQL_LIMIT_NAME);
50: String sql_offset_name(SQL_OFFSET_NAME);
51: String sql_default_name(SQL_DEFAULT_NAME);
52: String sql_distinct_name(SQL_DISTINCT_NAME);
53: String table_reverse_name(TABLE_REVERSE_NAME);
54:
1.186 paf 55: // local defines
56:
1.187 paf 57: #define COLUMN_SEPARATOR_NAME "separator"
58: #define COLUMN_ENCLOSER_NAME "encloser"
1.186 paf 59:
60:
1.1 paf 61: // methods
1.66 paf 62:
1.182 paf 63: static Table::Action_options get_action_options(Request& r, MethodParams& params,
64: const Table& source) {
1.176 paf 65: Table::Action_options result;
1.182 paf 66: if(!params.count())
67: return result;
68:
69: Value& maybe_options=params.last();
70: /* can not do it:
71: want to enable ^table::create[$source;
72: # $.option[]
73: ]
74: but there is ^table.locate[name;value]
1.176 paf 75:
1.212 ! paf 76: ...if(voptions.is_defined() && !voptions.is_string()))
1.182 paf 77: if(maybe_options.is_string()) { // allow empty options
78: result.defined=true;
1.176 paf 79: return result;
1.182 paf 80: }
81: */
82: HashStringValue* options=maybe_options.get_hash();
1.176 paf 83: if(!options)
84: return result;
85:
86: result.defined=true;
87: bool defined_offset=false;
88:
89: int valid_options=0;
1.182 paf 90: if(Value* voffset=options->get(sql_offset_name)) {
1.176 paf 91: valid_options++;
92: defined_offset=true;
93: if(voffset->is_string()) {
1.182 paf 94: const String& soffset=*voffset->get_string();
1.176 paf 95: if(soffset == "cur")
96: result.offset=source.current();
97: else
1.164 paf 98: throw Exception("parser.runtime",
1.176 paf 99: &soffset,
100: "must be 'cur' string or expression");
101: } else
102: result.offset=r.process_to_value(*voffset).as_int();
103: }
1.182 paf 104: if(Value* vlimit=options->get(sql_limit_name)) {
1.176 paf 105: valid_options++;
106: result.limit=r.process_to_value(*vlimit).as_int();
107: }
1.182 paf 108: if(Value *vreverse=(Value *)options->get(table_reverse_name)) {
109: valid_options++;
110: result.reverse=r.process_to_value(*vreverse).as_bool();
111: if(result.reverse && !defined_offset)
112: result.offset=source.count()-1;
113: }
114:
115: if(valid_options!=options->count())
1.176 paf 116: throw Exception("parser.runtime",
1.182 paf 117: 0,
1.176 paf 118: "called with invalid option");
119:
120: return result;
121: }
1.180 paf 122: static void check_option_param(bool options_defined,
1.182 paf 123: MethodParams& params, size_t next_param_index,
1.176 paf 124: const char *msg) {
1.182 paf 125: if(next_param_index+(options_defined?1:0) != params.count())
1.176 paf 126: throw Exception("parser.runtime",
1.182 paf 127: 0,
1.176 paf 128: "%s", msg);
1.157 paf 129: }
130:
1.182 paf 131: static void _create(Request& r, MethodParams& params) {
1.157 paf 132: // clone/copy part?
1.182 paf 133: if(Table *source=params[0].get_table()) {
134: Table::Action_options o=get_action_options(r, params, *source);
135: check_option_param(o.defined, params, 1,
1.176 paf 136: "too many parameters");
1.182 paf 137: GET_SELF(r, VTable).set_table(*new Table(*source, o));
1.157 paf 138: return;
139: }
1.142 paf 140:
1.1 paf 141: // data is last parameter
1.182 paf 142: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
143: const String& data=
144: r.process_to_string(params.as_junction(params.count()-1, "body must be code"));
1.44 paf 145:
146: // parse columns
1.182 paf 147: size_t raw_pos_after=0;
148: Table::columns_type columns;
149: if(params.count()==2) {
150: columns=Table::columns_type(0); // nameless
1.21 paf 151: } else {
1.182 paf 152: columns=Table::columns_type(new ArrayString);
1.44 paf 153:
1.182 paf 154: ArrayString head;
155: data.split(head, raw_pos_after, "\n", String::L_AS_IS, 1);
156: if(head.count()) {
157: size_t col_pos_after=0;
158: head[0]->split(*columns, col_pos_after, "\t", String::L_AS_IS);
159: }
1.44 paf 160: }
161:
1.182 paf 162: Table& table=*new Table(columns);
1.44 paf 163: // parse cells
1.182 paf 164:
165: ArrayString rows;
166: data.split(rows, raw_pos_after, "\n", String::L_AS_IS);
167: Array_iterator<const String*> i(rows);
1.98 parser 168: while(i.has_next()) {
1.182 paf 169: Table::element_type row(new ArrayString);
170: const String& string=*i.next();
1.118 parser 171: // remove comment lines
1.182 paf 172: if(!string.length())
1.44 paf 173: continue;
174:
1.182 paf 175: size_t col_pos_after=0;
176: string.split(*row, col_pos_after, "\t", String::L_AS_IS);
177: table+=row;
1.17 paf 178: }
1.1 paf 179:
1.44 paf 180: // replace any previous table value
1.182 paf 181: GET_SELF(r, VTable).set_table(table);
1.44 paf 182: }
183:
1.187 paf 184: struct lsplit_result {
185: char* piece;
186: char delim;
187:
188: operator bool() { return piece!=0; }
189: };
190:
191: inline lsplit_result lsplit(char* string, char delim1, char delim2) {
192: lsplit_result result;
193: if(string) {
194: char delims[]={delim1, delim2, 0};
195: if(char* v=strpbrk(string, delims)) {
196: result.delim=*v;
197: *v=0;
198: result.piece=v+1;
199: return result;
200: }
201: }
202: result.piece=0;
203: result.delim=0;
204: return result;
205: }
206:
207: inline lsplit_result lsplit(char* *string_ref, char delim1, char delim2) {
208: lsplit_result result;
209: result.piece=*string_ref;
210: lsplit_result next=lsplit(*string_ref, delim1, delim2);
211: result.delim=next.delim;
212: *string_ref=next.piece;
213: return result;
214: }
215:
216: static lsplit_result lsplit(char** string_ref, char delim1, char delim2, char encloser) {
217: lsplit_result result;
218:
219: if(char* string=*string_ref) {
220: if(encloser && *string==encloser) {
221: string++;
222:
223: char *read;
224: char *write;
225: write=read=string;
226: char c;
1.193 paf 227: while((c=*read++)) {
1.187 paf 228: if(c==encloser) {
229: char n=*read;
230: if(n==encloser) // double-encloser stands for encloser
231: read++;
232: else if(n==delim1 || n==delim2) {
233: result.delim=n;
234: read++;
235: break;
236: }
237: }
238:
239: *write++=c;
240: }
241: *write=0; // terminate
242: *string_ref=c? read: 0;
243: result.piece=string;
244: return result;
245: } else
246: return lsplit(string_ref, delim1, delim2);
247: }
248: result.piece=0;
249: return result;
250: }
251:
252: static void skip_empty_and_comment_lines( char** data_ref ) {
253: if(char *data=*data_ref) {
254: while( char c=*data ) {
255: if( c== '\n' || c == '#' ) {
256: /*nowhere=*/getrow(&data); // remove empty&comment lines
1.199 paf 257: if(!(*data_ref=data))
258: break;
1.187 paf 259: continue;
260: }
261: break;
262: }
263: }
264: }
265:
266: struct TableSeparators {
1.206 paf 267: char column; const String* scolumn;
268: char encloser; const String* sencloser;
269:
270: TableSeparators():
271: column('\t'), scolumn(new String("\t", false)),
272: encloser(0), sencloser(0)
273: {}
1.187 paf 274: void load( HashStringValue& options ) {
275: if(Value* vseparator=options.get(COLUMN_SEPARATOR_NAME)) {
276: options.remove(COLUMN_SEPARATOR_NAME);
1.206 paf 277: scolumn=&vseparator->as_string();
278: if(scolumn->length()!=1)
1.187 paf 279: throw Exception("parser.runtime",
1.206 paf 280: scolumn,
1.187 paf 281: "separator must be one character long");
1.206 paf 282: column=scolumn->first_char();
1.187 paf 283: }
284: if(Value* vencloser=options.get(COLUMN_ENCLOSER_NAME)) {
285: options.remove(COLUMN_ENCLOSER_NAME);
1.188 paf 286: sencloser=&vencloser->as_string();
287: if(sencloser->length()!=1)
1.187 paf 288: throw Exception("parser.runtime",
1.188 paf 289: sencloser,
1.187 paf 290: "encloser must be one character long");
1.188 paf 291: encloser=sencloser->first_char();
1.187 paf 292: }
293: }
294: };
295:
1.182 paf 296: static void _load(Request& r, MethodParams& params) {
297: const String& first_param=params.as_string(0, "file name must be string");
1.168 paf 298: int filename_param_index=0;
299: bool nameless=first_param=="nameless";
300: if(nameless)
301: filename_param_index++;
1.182 paf 302: size_t options_param_index=filename_param_index+1;
1.186 paf 303:
304: HashStringValue *options=0;
1.187 paf 305: TableSeparators separators;
1.186 paf 306: if(options_param_index<params.count()
307: && (options=params.as_no_junction(options_param_index, "additional params must be hash").get_hash())) {
308: // cloning, so that we could change [to simplify checks on params inside file_read_text
309: options=new HashStringValue(*options);
1.187 paf 310: separators.load(*options);
1.186 paf 311: }
312:
1.44 paf 313: // loading text
1.182 paf 314: char *data=file_read_text(r.charsets,
315: r.absolute(params.as_string(filename_param_index, "file name must be string")),
1.168 paf 316: true,
1.186 paf 317: options
1.168 paf 318: );
1.44 paf 319:
1.1 paf 320: // parse columns
1.182 paf 321: Table::columns_type columns;
1.168 paf 322: if(nameless) {
1.182 paf 323: columns=Table::columns_type(0); // nameless
1.1 paf 324: } else {
1.182 paf 325: columns=Table::columns_type(new ArrayString);
1.1 paf 326:
1.187 paf 327: skip_empty_and_comment_lines(&data);
328: while( lsplit_result sr=lsplit(&data, separators.column, '\n', separators.encloser) ) {
329: *columns+=new String(sr.piece, 0, true);
330: if(sr.delim=='\n')
331: break;
1.139 paf 332: }
1.1 paf 333: }
1.187 paf 334:
335: Table& table=*new Table(columns);
1.1 paf 336:
337: // parse cells
1.187 paf 338: Table::element_type row(new ArrayString);
339: skip_empty_and_comment_lines(&data);
340: while( lsplit_result sr=lsplit(&data, separators.column, '\n', separators.encloser) ) {
1.201 paf 341: if(!*sr.piece && !sr.delim && !row->count()) // append last empty column [if without \n]
342: break;
1.187 paf 343: *row+=new String(sr.piece, 0, true);
344: if(sr.delim=='\n') {
345: table+=row;
346: row=new ArrayString;
347: skip_empty_and_comment_lines(&data);
1.1 paf 348: }
1.187 paf 349: }
350: // last line [if without \n]
351: if(row->count())
1.1 paf 352: table+=row;
1.187 paf 353:
1.1 paf 354: // replace any previous table value
1.182 paf 355: GET_SELF(r, VTable).set_table(table);
1.1 paf 356: }
1.2 paf 357:
1.188 paf 358: static void maybe_enclose( String& to, const String& from, char encloser, const String* sencloser ) {
359: if(encloser) {
360: to<<*sencloser;
361: // while we have 'encloser'...
1.189 paf 362: size_t pos_after=0;
363: for( size_t pos_before; (pos_before=from.pos( encloser, pos_after ))!=STRING_NOT_FOUND; pos_after=pos_before+1) {
1.188 paf 364: to<<from.mid(pos_before+1/*+found encloser*/, pos_after-pos_before);
365: to<<*sencloser; // doubling encloser
366: }
367: // last piece
368: size_t from_length=from.length();
369: if(pos_after<from_length)
370: to<<from.mid(pos_after, from_length);
371:
372: to<<*sencloser;
373: } else
1.202 paf 374: to<<from;
1.188 paf 375: }
376:
377:
1.182 paf 378: static void _save(Request& r, MethodParams& params) {
1.188 paf 379: const String& first_arg=params.as_string(0, "first argument must not be code");
380: size_t param_index=1;
381:
382: bool do_append=false;
383: bool output_column_names=true;
384:
385: // mode?
386: if(first_arg=="append")
387: do_append=true;
388: else if(first_arg=="nameless")
389: output_column_names=false;
390: else
391: --param_index;
392:
393: const String& file_name=params.as_string(param_index++, "file name must not be code");
394:
395: TableSeparators separators;
396: if(param_index<params.count()) {
397: if(HashStringValue *options=params.as_no_junction(param_index++, "additional params must be hash").get_hash()) {
398: separators.load(*options);
399: if(options->count())
400: throw Exception("parser.runtime",
401: 0,
402: "invalid option passed");
403: } else
404: throw Exception("parser.runtime",
405: 0,
406: "additional params must be hash (did you spell mode parameter correctly?)");
407:
408: }
409: if(param_index<params.count())
410: throw Exception("parser.runtime",
411: 0,
412: "bad mode (must be nameless or append)");
1.22 paf 413:
1.182 paf 414: Table& table=GET_SELF(r, VTable).table();
1.31 paf 415:
1.182 paf 416: String sdata;
1.188 paf 417: if(output_column_names) {
1.31 paf 418: if(table.columns()) { // named table
1.182 paf 419: for(Array_iterator<const String*> i(*table.columns()); i.has_next(); ) {
1.188 paf 420: maybe_enclose( sdata, *i.next(), separators.encloser, separators.sencloser );
1.98 parser 421: if(i.has_next())
1.206 paf 422: sdata<<*separators.scolumn;
1.31 paf 423: }
1.188 paf 424: } else { // nameless table [we were asked to output column names]
1.182 paf 425: if(int lsize=table.count()?table[0]->count():0)
1.31 paf 426: for(int column=0; column<lsize; column++) {
1.182 paf 427: char *cindex_tab=new(PointerFreeGC) char[MAX_NUMBER];
428: sdata.append_know_length(cindex_tab,
1.185 paf 429: snprintf(cindex_tab, MAX_NUMBER,
1.206 paf 430: column<lsize-1?"%d%c":"%d", column, separators.column),
1.185 paf 431: String::L_CLEAN);
1.31 paf 432: }
433: else
1.182 paf 434: sdata.append_help_length("empty nameless table", 0, String::L_CLEAN);
1.31 paf 435: }
1.182 paf 436: sdata.append_know_length("\n", 1, String::L_CLEAN);
1.188 paf 437: }
1.129 paf 438:
1.31 paf 439: // data lines
1.182 paf 440: Array_iterator<ArrayString*> i(table);
1.98 parser 441: while(i.has_next()) {
1.182 paf 442: for(Array_iterator<const String*> c(*i.next()); c.has_next(); ) {
1.188 paf 443: maybe_enclose( sdata, *c.next(), separators.encloser, separators.sencloser );
1.98 parser 444: if(c.has_next())
1.206 paf 445: sdata<<*separators.scolumn;
1.31 paf 446: }
1.182 paf 447: sdata.append_know_length("\n", 1, String::L_CLEAN);
1.31 paf 448: }
449:
450: // write
1.188 paf 451: file_write(r.absolute(file_name),
1.182 paf 452: sdata.cstr(), sdata.length(), true, do_append);
1.22 paf 453: }
454:
1.182 paf 455: static void _count(Request& r, MethodParams&) {
456: int result=GET_SELF(r, VTable).table().count();
457: r.write_no_lang(*new VInt(result));
1.6 paf 458: }
459:
1.182 paf 460: static void _line(Request& r, MethodParams&) {
461: int result=1+GET_SELF(r, VTable).table().current();
462: r.write_no_lang(*new VInt(result));
1.6 paf 463: }
464:
1.182 paf 465: static void _offset(Request& r, MethodParams& params) {
466: Table& table=GET_SELF(r, VTable).table();
467: if(params.count()) {
1.133 paf 468: bool absolute=false;
1.182 paf 469: if(params.count()>1) {
470: const String& whence=params.as_string(0, "whence must be string");
1.133 paf 471: if(whence=="cur")
1.134 paf 472: absolute=false;
1.133 paf 473: else if(whence=="set")
1.134 paf 474: absolute=true;
1.133 paf 475: else
1.146 paf 476: throw Exception("parser.runtime",
1.134 paf 477: &whence,
478: "is invalid whence, valid are 'cur' or 'set'");
1.157 paf 479: }
1.133 paf 480:
1.211 paf 481: int offset=params.as_int(params.count()-1, "offset must be expression", r);
482: table.offset(absolute, offset);
1.151 paf 483: } else
1.182 paf 484: r.write_no_lang(*new VInt(table.current()));
1.6 paf 485: }
486:
1.182 paf 487: static void _menu(Request& r, MethodParams& params) {
488: Value& body_code=params.as_junction(0, "body must be code");
1.7 paf 489:
1.182 paf 490: Value* delim_maybe_code=params.count()>1?¶ms[1]:0;
1.7 paf 491:
1.182 paf 492: Table& table=GET_SELF(r, VTable).table();
1.7 paf 493: bool need_delim=false;
1.99 parser 494: int saved_current=table.current();
1.182 paf 495: int size=table.count();
1.99 parser 496: for(int row=0; row<size; row++) {
1.22 paf 497: table.set_current(row);
1.7 paf 498:
1.161 paf 499: StringOrValue sv_processed=r.process(body_code);
1.182 paf 500: const String* s_processed=sv_processed.get_string();
501: if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
1.161 paf 502: if(need_delim) // need delim & iteration produced string?
1.150 paf 503: r.write_pass_lang(r.process(*delim_maybe_code));
1.7 paf 504: need_delim=true;
505: }
1.161 paf 506: r.write_pass_lang(sv_processed);
1.7 paf 507: }
1.99 parser 508: table.set_current(saved_current);
1.7 paf 509: }
510:
1.110 parser 511: #ifndef DOXYGEN
1.174 paf 512: enum Table2hash_distint { D_ILLEGAL, D_FIRST, D_TABLES };
1.74 paf 513: struct Row_info {
1.166 paf 514: Request *r;
1.74 paf 515: Table *table;
1.182 paf 516: Value* key_code;
517: size_t key_field;
518: Array<int>* value_fields;
519: HashStringValue* hash;
1.174 paf 520: Table2hash_distint distinct;
1.182 paf 521: size_t row;
1.74 paf 522: };
1.110 parser 523: #endif
1.182 paf 524: static void table_row_to_hash(Table::element_type row, Row_info *info) {
525: const String* key;
526: if(info->key_code) {
527: info->table->set_current(info->row++); // change context row
528: StringOrValue sv_processed=info->r->process(*info->key_code);
1.166 paf 529: key=&sv_processed.as_string();
530: } else
1.182 paf 531: key=info->key_field<row->count()?row->get(info->key_field):0;
1.166 paf 532:
533: if(!key)
534: return; // ignore rows without key [too-short-record_array if-indexed]
1.74 paf 535:
1.182 paf 536: switch(info->distinct) {
1.174 paf 537: case D_ILLEGAL: case D_FIRST:
538: {
1.182 paf 539: VHash* vhash=new VHash;
540: HashStringValue& hash=vhash->hash();
541: for(Array_iterator<int> i(*info->value_fields); i.has_next(); ) {
542: size_t value_field=i.next();
543: if(value_field<row->count())
1.174 paf 544: hash.put(
1.182 paf 545: *info->table->columns()->get(value_field),
546: new VString(*row->get(value_field)));
1.174 paf 547: }
548:
1.182 paf 549: if(info->hash->put_dont_replace(*key, vhash)) // put. existed?
550: if(info->distinct==D_ILLEGAL)
1.174 paf 551: throw Exception("parser.runtime",
552: key,
553: "duplicate key");
554: }
555: break;
556: case D_TABLES:
557: {
1.182 paf 558: VTable* vtable=(VTable*)info->hash->get(*key); // put. table existed?
1.174 paf 559: Table* table;
560: if(vtable)
561: table=vtable->get_table();
562: else {
563: // no? creating table of same structure as source
1.179 paf 564: Table::Action_options table_options(0, 0);
1.182 paf 565: table=new Table(*info->table, table_options/*no rows, just structure*/);
566: info->hash->put(*key, new VTable(table));
1.174 paf 567: }
1.182 paf 568: *table+=row;
1.174 paf 569: }
570: break;
571: default:
572: throw Exception(0,
573: 0,
1.182 paf 574: "invalid distinct code (#%d)", info->distinct);
1.74 paf 575: }
576: }
1.182 paf 577: static void _hash(Request& r, MethodParams& params) {
578: Table& self_table=GET_SELF(r, VTable).table();
579: VHash& result=*new VHash;
580: if(Table::columns_type columns=self_table.columns())
581: if(columns->count()>0) {
1.174 paf 582: Table2hash_distint distinct=D_ILLEGAL;
1.182 paf 583: int param_index=params.count()-1;
1.166 paf 584: if(param_index>0) {
1.182 paf 585: if(HashStringValue* options=
586: params.as_no_junction(param_index, "param must not be code").get_hash()) {
1.166 paf 587: --param_index;
588: int valid_options=0;
1.182 paf 589: if(Value* vdistinct_code=options->get(sql_distinct_name)) {
1.166 paf 590: valid_options++;
1.174 paf 591: Value& vdistinct_value=r.process_to_value(*vdistinct_code);
592: if(vdistinct_value.is_string()) {
593: const String& sdistinct=*vdistinct_value.get_string();
594: if(sdistinct=="tables")
595: distinct=D_TABLES;
596: else
597: throw Exception("parser.runtime",
598: &sdistinct,
599: "must be 'tables' or true/false");
600: } else
601: distinct=vdistinct_value.as_bool()?D_FIRST:D_ILLEGAL;
1.166 paf 602: }
1.182 paf 603: if(valid_options!=options->count())
1.166 paf 604: throw Exception("parser.runtime",
1.182 paf 605: 0,
1.166 paf 606: "called with invalid option");
1.163 paf 607: }
608: }
609: if(param_index==2) // bad options param type
610: throw Exception("parser.runtime",
1.182 paf 611: 0,
1.163 paf 612: "options must be hash");
613:
1.182 paf 614: Array<int> value_fields;
1.163 paf 615: if(param_index>0) {
1.174 paf 616: if(distinct!=D_ILLEGAL && distinct!=D_FIRST)
617: throw Exception("parser.runtime",
618: 0,
619: "in distinct[tables] mode you may not specify value field(s)");
1.182 paf 620: Value& value_fields_param=params.as_no_junction(param_index, "value field(s) must not be code");
1.123 parser 621: if(value_fields_param.is_string()) {
1.182 paf 622: value_fields+=self_table.column_name2index(
623: *value_fields_param.get_string(), true);
624: } else if(Table* value_fields_table=value_fields_param.get_table()) {
625: for(Array_iterator<Table::element_type> i(*value_fields_table);
626: i.has_next(); ) {
627: const String& value_field_name
628: =*i.next()->get(0);
629: value_fields
630: +=self_table.column_name2index(value_field_name, true);
1.123 parser 631: }
632: } else
1.146 paf 633: throw Exception("parser.runtime",
1.182 paf 634: 0,
1.197 paf 635: "value field(s) must be string or table"
1.123 parser 636: );
637: } else { // by all columns, including key
1.174 paf 638: if(!(distinct!=D_ILLEGAL && distinct!=D_FIRST))
1.182 paf 639: for(size_t i=0; i<columns->count(); i++)
1.174 paf 640: value_fields+=i;
1.74 paf 641: }
642:
1.182 paf 643:
644: {
645: Value* key_param=¶ms[0];
1.193 paf 646: Row_info info={
647: &r,
648: &self_table,
649: /*key_code=*/key_param->get_junction()?key_param:0,
1.197 paf 650: /*key_field=*/0/*filled below*/,
1.193 paf 651: &value_fields,
652: &result.hash(),
653: distinct,
654: /*row=*/0
655: };
1.195 paf 656: info.key_field=(info.key_code?-1
657: :self_table.column_name2index(key_param->as_string(), true));
1.182 paf 658:
659: int saved_current=self_table.current();
660: self_table.for_each(table_row_to_hash, &info);
661: self_table.set_current(saved_current);
1.207 paf 662:
663: result.extract_default();
1.182 paf 664: }
1.74 paf 665: }
1.97 parser 666: r.write_no_lang(result);
1.74 paf 667: }
668:
1.110 parser 669: #ifndef DOXYGEN
1.78 paf 670: struct Table_seq_item {
1.182 paf 671: ArrayString* row;
1.34 paf 672: union {
1.182 paf 673: const char *c_str;
1.34 paf 674: double d;
675: } value;
1.32 paf 676: };
1.110 parser 677: #endif
1.34 paf 678: static int sort_cmp_string(const void *a, const void *b) {
679: return strcmp(
1.78 paf 680: static_cast<const Table_seq_item *>(a)->value.c_str,
681: static_cast<const Table_seq_item *>(b)->value.c_str
1.34 paf 682: );
683: }
684: static int sort_cmp_double(const void *a, const void *b) {
1.78 paf 685: double va=static_cast<const Table_seq_item *>(a)->value.d;
686: double vb=static_cast<const Table_seq_item *>(b)->value.d;
1.34 paf 687: if(va<vb)
688: return -1;
689: else if(va>vb)
690: return +1;
691: else
692: return 0;
693: }
1.182 paf 694: static void _sort(Request& r, MethodParams& params) {
695: Value& key_maker=params.as_junction(0, "key-maker must be code");
1.61 paf 696:
1.182 paf 697: bool reverse=params.count()>1/*..[desc|asc|]*/?
698: reverse=params.as_no_junction(1, "order must not be code").as_string()=="desc":
1.104 parser 699: false; // default=asc
1.32 paf 700:
1.182 paf 701: Table& old_table=GET_SELF(r, VTable).table();
702: Table& new_table=*new Table(old_table.columns());
1.34 paf 703:
1.182 paf 704: Table_seq_item* seq=new(PointerFreeGC) Table_seq_item[old_table.count()];
1.34 paf 705: int i;
706:
707: // calculate key values
708: bool key_values_are_strings=true;
1.182 paf 709: int old_count=old_table.count();
710: for(i=0; i<old_count; i++) {
1.101 parser 711: old_table.set_current(i);
1.32 paf 712: // calculate key value
1.182 paf 713: seq[i].row=old_table[i];
714: Value& value=r.process_to_value(key_maker).as_expr_result(true/*return string as-is*/);
1.34 paf 715: if(i==0) // determining key values type by first one
716: key_values_are_strings=value.is_string();
717:
718: if(key_values_are_strings)
719: seq[i].value.c_str=value.as_string().cstr();
720: else
721: seq[i].value.d=value.as_double();
1.32 paf 722: }
723: // sort keys
1.182 paf 724: _qsort(seq, old_count, sizeof(Table_seq_item),
1.34 paf 725: key_values_are_strings?sort_cmp_string:sort_cmp_double);
1.32 paf 726:
1.34 paf 727: // reorder table as they require in 'seq'
1.182 paf 728: for(i=0; i<old_count; i++)
729: new_table+=Table::element_type(seq[reverse?old_count-1-i:i].row);
730:
731: delete[] seq;
1.32 paf 732:
1.116 parser 733: // replace any previous table value
1.182 paf 734: GET_SELF(r, VTable).set_table(new_table);
1.32 paf 735: }
736:
1.176 paf 737: #ifndef DOXYGEN
1.182 paf 738: struct Expression_is_true_info {
1.176 paf 739: Request* r;
740: Value* expression_code;
741: };
742: #endif
1.191 paf 743: static bool expression_is_true(Table&, Expression_is_true_info* info) {
744: return info->r->process_to_value(*info->expression_code).as_bool();
1.176 paf 745: }
746: static bool _locate_expression(Table& table, Table::Action_options o,
1.182 paf 747: Request& r, MethodParams& params) {
748: check_option_param(o.defined, params, 1,
1.176 paf 749: "locate by expression only has parameters: expression and, maybe, options");
1.182 paf 750: Value& expression_code=params.as_junction(0, "must be expression");
1.145 paf 751:
1.182 paf 752: Expression_is_true_info info={&r, &expression_code};
753: return table.table_first_that(expression_is_true, &info, o);
1.145 paf 754: }
1.176 paf 755: static bool _locate_name_value(Table& table, Table::Action_options o,
1.191 paf 756: Request&, MethodParams& params) {
1.182 paf 757: check_option_param(o.defined, params, 2,
1.176 paf 758: "locate by locate by name has parameters: name, value and, maybe, options");
1.182 paf 759: const String& name=params.as_string(0, "column name must be string");
760: const String& value=params.as_string(1, "value must be string");
761: return table.locate(name, value, o);
762: }
763: static void _locate(Request& r, MethodParams& params) {
764: Table& table=GET_SELF(r, VTable).table();
1.72 paf 765:
1.182 paf 766: Table::Action_options o=get_action_options(r, params, table);
767:
768: bool result=params[0].get_junction()?
769: _locate_expression(table, o, r, params) :
770: _locate_name_value(table, o, r, params);
771: r.write_no_lang(*new VBool(result));
1.145 paf 772: }
1.182 paf 773:
774:
1.191 paf 775: static void _flip(Request& r, MethodParams&) {
1.182 paf 776: Table& old_table=GET_SELF(r, VTable).table();
1.184 paf 777: Table& new_table=*new Table(0);
1.182 paf 778: if(size_t old_count=old_table.count())
779: if(size_t old_cols=old_table[0]->count())
780: for(size_t column=0; column<old_cols; column++) {
781: Table::element_type new_row(new ArrayString(old_count));
782: for(size_t i=0; i<old_count; i++) {
783: Table::element_type old_row=old_table[i];
784: *new_row+=column<old_row->count()?old_row->get(column):new String;
1.39 paf 785: }
1.182 paf 786: new_table+=new_row;
1.39 paf 787: }
788:
1.182 paf 789: r.write_no_lang(*new VTable(&new_table));
1.39 paf 790: }
791:
1.182 paf 792: static void _append(Request& r, MethodParams& params) {
1.134 paf 793: // data
1.182 paf 794: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
795: const String& string=r.process_to_string(params.as_junction(0, "body must be code"));
1.41 paf 796:
797: // parse cells
1.182 paf 798: Table::element_type row=new ArrayString;
799: size_t pos_after=0;
800: string.split(*row, pos_after, "\t", String::L_AS_IS);
1.41 paf 801:
1.182 paf 802: GET_SELF(r, VTable).table()+=row;
1.41 paf 803: }
804:
1.182 paf 805: static void join_named_row(Table& src, Table* dest) {
806: Table::columns_type dest_columns=dest->columns();
807: size_t dest_columns_count=dest_columns->count();
808: Table::element_type dest_row(new ArrayString(dest_columns_count));
809: for(size_t dest_column=0; dest_column<dest_columns_count; dest_column++) {
810: const String* src_item=src.item(*dest_columns->get(dest_column));
811: *dest_row+=src_item?src_item:new String;
812: }
813: *dest+=dest_row;
814: }
815: static void join_nameless_row(Table& src, Table* dest) {
816: *dest+=src[src.current()];
817: }
818: static void _join(Request& r, MethodParams& params) {
819: Table* maybe_src=params.as_no_junction(0, "table ref must not be code").get_table();
1.42 paf 820: if(!maybe_src)
1.146 paf 821: throw Exception("parser.runtime",
1.182 paf 822: 0,
1.42 paf 823: "source is not a table");
1.176 paf 824: Table& src=*maybe_src;
825:
1.182 paf 826: Table::Action_options o=get_action_options(r, params, src);
827: check_option_param(o.defined, params, 1,
1.176 paf 828: "invalid extra parameter");
1.42 paf 829:
1.182 paf 830: Table& dest=GET_SELF(r, VTable).table();
1.42 paf 831: if(&src == &dest)
1.146 paf 832: throw Exception("parser.runtime",
1.182 paf 833: 0,
1.42 paf 834: "source and destination are same table");
835:
1.193 paf 836: if(dest.columns()) // dest is named
1.182 paf 837: src.table_for_each(join_named_row, &dest, o);
838: else // dest is nameless
839: src.table_for_each(join_nameless_row, &dest, o);
1.42 paf 840: }
841:
1.94 parser 842: #ifndef DOXYGEN
1.169 paf 843: class Table_sql_event_handlers: public SQL_Driver_query_event_handlers {
1.182 paf 844: ArrayString& columns;
845: ArrayString* row;
1.94 parser 846: public:
1.182 paf 847: Table* table;
848: public:
849: Table_sql_event_handlers() :
850: columns(*new ArrayString), row(0), table(0) {
1.94 parser 851: }
852:
1.182 paf 853: bool add_column(SQL_Error& error, const char *str, size_t length) {
1.170 paf 854: try {
1.182 paf 855: columns+=new String(str, length, true);
1.170 paf 856: return false;
857: } catch(...) {
858: error=SQL_Error("exception occured in Table_sql_event_handlers::add_column");
859: return true;
860: }
861: }
862: bool before_rows(SQL_Error& error) {
863: try {
1.182 paf 864: table=new Table(&columns);
1.170 paf 865: return false;
866: } catch(...) {
867: error=SQL_Error("exception occured in Table_sql_event_handlers::before_rows");
868: return true;
869: }
870: }
871: bool add_row(SQL_Error& error) {
872: try {
1.182 paf 873: *table+=row=new ArrayString;
1.170 paf 874: return false;
875: } catch(...) {
876: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row");
877: return true;
878: }
879: }
1.182 paf 880: bool add_row_cell(SQL_Error& error, const char* str, size_t length) {
1.170 paf 881: try {
1.182 paf 882: String& cell=*new String;
883: if(length)
884: cell.append_know_length(str, length, String::L_TAINTED);
885: *row+=&cell;
1.170 paf 886: return false;
887: } catch(...) {
888: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row_cell");
889: return true;
890: }
1.94 parser 891: }
892: };
893: #endif
1.204 paf 894:
895: static void marshal_bind(
896: HashStringValue::key_type aname,
897: HashStringValue::value_type avalue,
898: SQL_Driver::Placeholder** pptr)
899: {
900: SQL_Driver::Placeholder& ph=**pptr;
901: ph.name=aname.cstr();
1.205 paf 902: ph.value=avalue->as_string().cstr(String::L_UNSPECIFIED);
1.204 paf 903: ph.is_null=avalue->get_class()==void_class;
904: ph.were_updated=false;
905:
906: (*pptr)++;
907: }
908:
909: // not static, used elsewhere
910: int marshal_binds(HashStringValue& hash, SQL_Driver::Placeholder*& placeholders) {
911: int hash_count=hash.count();
912: placeholders=new(UseGC) SQL_Driver::Placeholder[hash_count];
913: SQL_Driver::Placeholder* ptr=placeholders;
914: hash.for_each(marshal_bind, &ptr);
915: return hash_count;
916: }
917:
918: // not static, used elsewhere
919: void unmarshal_bind_updates(HashStringValue& hash, int placeholder_count, SQL_Driver::Placeholder* placeholders) {
920: SQL_Driver::Placeholder* ph=placeholders;
921: for(int i=0; i<placeholder_count; i++, ph++)
922: if(ph->were_updated) {
923: Value* value;
924: if(ph->is_null)
925: value=new VVoid();
926: else
927: if(ph->value)
928: value=new VString(*new String(ph->value, 0, true/*tainted*/));
929: else
930: value=new VString(*new String());
931: hash.put(ph->name, value);
932: }
933: }
934:
1.182 paf 935: static void _sql(Request& r, MethodParams& params) {
936: Value& statement=params.as_junction(0, "statement must be code");
1.49 paf 937:
1.204 paf 938: HashStringValue* bind=0;
1.53 paf 939: ulong limit=0;
1.100 parser 940: ulong offset=0;
1.182 paf 941: if(params.count()>1) {
942: Value& voptions=params.as_no_junction(1, "options must be hash, not code");
1.212 ! paf 943: if(voptions.is_defined() && !voptions.is_string())
1.182 paf 944: if(HashStringValue* options=voptions.get_hash()) {
1.164 paf 945: int valid_options=0;
1.204 paf 946: if(Value* vbind=options->get(sql_bind_name)) {
947: valid_options++;
948: bind=vbind->get_hash();
949: }
1.182 paf 950: if(Value* vlimit=options->get(sql_limit_name)) {
1.164 paf 951: valid_options++;
1.147 paf 952: limit=(ulong)r.process_to_value(*vlimit).as_double();
1.164 paf 953: }
1.182 paf 954: if(Value* voffset=options->get(sql_offset_name)) {
1.164 paf 955: valid_options++;
1.147 paf 956: offset=(ulong)r.process_to_value(*voffset).as_double();
1.164 paf 957: }
1.182 paf 958: if(valid_options!=options->count())
1.164 paf 959: throw Exception("parser.runtime",
1.182 paf 960: 0,
1.164 paf 961: "called with invalid option");
1.109 parser 962: } else
1.146 paf 963: throw Exception("parser.runtime",
1.182 paf 964: 0,
1.109 parser 965: "options must be hash");
1.49 paf 966: }
967:
1.204 paf 968: SQL_Driver::Placeholder* placeholders=0;
969: uint placeholders_count=0;
970: if(bind)
971: placeholders_count=marshal_binds(*bind, placeholders);
972:
1.182 paf 973: Temp_lang temp_lang(r, String::L_SQL);
974: const String& statement_string=r.process_to_string(statement);
975: const char* statement_cstr=
976: statement_string.cstr(String::L_UNSPECIFIED, r.connection());
977: Table_sql_event_handlers handlers;
1.135 paf 978: #ifdef RESOURCES_DEBUG
979: struct timeval mt[2];
980: //measure:before
981: gettimeofday(&mt[0],NULL);
982: #endif
1.182 paf 983: r.connection()->query(
1.203 paf 984: statement_cstr,
1.208 paf 985: placeholders_count, placeholders,
1.203 paf 986: offset, limit,
1.160 paf 987: handlers,
988: statement_string);
1.135 paf 989:
990: #ifdef RESOURCES_DEBUG
991: //measure:after connect
992: gettimeofday(&mt[1],NULL);
993:
994: double t[2];
995: for(int i=0;i<2;i++)
996: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
997:
998: r.sql_request_time+=t[1]-t[0];
999: #endif
1.204 paf 1000:
1001: if(bind)
1002: unmarshal_bind_updates(*bind, placeholders_count, placeholders);
1.96 parser 1003:
1.182 paf 1004: Table& result=
1005: handlers.table?*handlers.table: // query resulted in table? return it
1006: *new Table(Table::columns_type(0)); // query returned no table, fake it
1.49 paf 1007:
1008: // replace any previous table value
1.182 paf 1009: GET_SELF(r, VTable).set_table(result);
1.49 paf 1010: }
1011:
1.182 paf 1012: static void _columns(Request& r, MethodParams&) {
1.88 parser 1013:
1.182 paf 1014: Table::columns_type result_columns(new ArrayString);
1015: *result_columns+=new String("column");
1016: Table& result_table=*new Table(result_columns);
1.88 parser 1017:
1.182 paf 1018: Table& source_table=GET_SELF(r, VTable).table();
1019: if(Table::columns_type source_columns=source_table.columns()) {
1020: for(Array_iterator<const String*> i(*source_columns); i.has_next(); ) {
1021: Table::element_type result_row(new ArrayString);
1022: *result_row+=i.next();
1023: result_table+=result_row;
1.88 parser 1024: }
1025: }
1026:
1.182 paf 1027: r.write_no_lang(*new VTable(&result_table));
1.88 parser 1028: }
1029:
1.182 paf 1030: static void _select(Request& r, MethodParams& params) {
1031: Value& vcondition=params.as_junction(0, "condition must be expression");
1.148 paf 1032:
1.182 paf 1033: Table& source_table=GET_SELF(r, VTable).table();
1034: Table& result_table=*new Table(source_table.columns());
1.148 paf 1035:
1036: int saved_current=source_table.current();
1.182 paf 1037: int size=source_table.count();
1.148 paf 1038: for(int row=0; row<size; row++) {
1039: source_table.set_current(row);
1040:
1.150 paf 1041: bool condition=r.process_to_value(vcondition,
1.148 paf 1042: false/*don't intercept string*/).as_bool();
1043:
1044: if(condition) // ...condition is true=
1.182 paf 1045: result_table+=source_table[row]; // =green light to go to result
1.148 paf 1046: }
1047: source_table.set_current(saved_current);
1048:
1.182 paf 1049: r.write_no_lang(*new VTable(&result_table));
1.148 paf 1050: }
1051:
1.66 paf 1052: // constructor
1053:
1.182 paf 1054: MTable::MTable(): Methoded("table") {
1.142 paf 1055: // ^table::create{data}
1056: // ^table::create[nameless]{data}
1057: // ^table::create[table]
1058: add_native_method("create", Method::CT_DYNAMIC, _create, 1, 2);
1059: // old name for compatibility with <= v 1.141 2002/01/25 11:33:45 paf
1060: add_native_method("set", Method::CT_DYNAMIC, _create, 1, 2);
1.2 paf 1061:
1.142 paf 1062: // ^table::load[file]
1063: // ^table::load[nameless;file]
1.168 paf 1064: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 3);
1.22 paf 1065:
1066: // ^table.save[file]
1067: // ^table.save[nameless;file]
1.188 paf 1068: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 3);
1.6 paf 1069:
1070: // ^table.count[]
1.66 paf 1071: add_native_method("count", Method::CT_DYNAMIC, _count, 0, 0);
1.6 paf 1072:
1073: // ^table.line[]
1.66 paf 1074: add_native_method("line", Method::CT_DYNAMIC, _line, 0, 0);
1.6 paf 1075:
1.10 paf 1076: // ^table.offset[]
1.133 paf 1077: // ^table.offset(offset)
1078: // ^table.offset[cur|set](offset)
1079: add_native_method("offset", Method::CT_DYNAMIC, _offset, 0, 2);
1.7 paf 1080:
1.10 paf 1081: // ^table.menu{code}
1082: // ^table.menu{code}[delim]
1.66 paf 1083: add_native_method("menu", Method::CT_DYNAMIC, _menu, 1, 2);
1.74 paf 1084:
1.79 paf 1085: // ^table:hash[key field name]
1.123 parser 1086: // ^table:hash[key field name][value field name(s) string/table]
1.163 paf 1087: add_native_method("hash", Method::CT_DYNAMIC, _hash, 1, 3);
1.32 paf 1088:
1.102 parser 1089: // ^table.sort{string-key-maker} ^table.sort{string-key-maker}[desc|asc]
1090: // ^table.sort(numeric-key-maker) ^table.sort(numeric-key-maker)[desc|asc]
1.66 paf 1091: add_native_method("sort", Method::CT_DYNAMIC, _sort, 1, 2);
1.8 paf 1092:
1.36 paf 1093: // ^table.locate[field;value]
1.176 paf 1094: add_native_method("locate", Method::CT_DYNAMIC, _locate, 1, 3);
1.39 paf 1095:
1096: // ^table.flip[]
1.66 paf 1097: add_native_method("flip", Method::CT_DYNAMIC, _flip, 0, 0);
1.41 paf 1098:
1099: // ^table.append{r{tab}e{tab}c{tab}o{tab}r{tab}d}
1.66 paf 1100: add_native_method("append", Method::CT_DYNAMIC, _append, 1, 1);
1.42 paf 1101:
1.157 paf 1102: // ^table.join[table][$.limit(10) $.offset(1) $.offset[cur] ]
1103: add_native_method("join", Method::CT_DYNAMIC, _join, 1, 2);
1.49 paf 1104:
1105:
1.100 parser 1106: // ^table:sql[query]
1107: // ^table:sql[query][$.limit(1) $.offset(2)]
1108: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.88 parser 1109:
1110: // ^table:columns[]
1111: add_native_method("columns", Method::CT_DYNAMIC, _columns, 0, 0);
1.148 paf 1112:
1113: // ^table.select(expression) = table
1114: add_native_method("select", Method::CT_DYNAMIC, _select, 1, 1);
1.40 paf 1115: }
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