Annotation of parser3/src/classes/table.C, revision 1.214
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: */
1.214 ! paf 7: static const char * const IDENT_TABLE_C="$Date: 2005/11/16 14:18:05 $";
1.1 paf 8:
1.105 parser 9: #include "classes.h"
1.182 paf 10: #include "pa_vmethod_frame.h"
11:
1.16 paf 12: #include "pa_common.h"
1.1 paf 13: #include "pa_request.h"
14: #include "pa_vtable.h"
1.6 paf 15: #include "pa_vint.h"
1.51 paf 16: #include "pa_sql_connection.h"
1.72 paf 17: #include "pa_vbool.h"
1.1 paf 18:
1.66 paf 19: // class
20:
1.182 paf 21: class MTable: public Methoded {
1.66 paf 22: public: // VStateless_class
1.209 paf 23: Value* create_new_value(Pool&, HashStringValue&) { return new VTable(); }
1.66 paf 24:
25: public:
1.182 paf 26: MTable();
1.70 paf 27:
28: public: // Methoded
1.66 paf 29: bool used_directly() { return true; }
30: };
1.1 paf 31:
1.182 paf 32: // global variable
33:
34: DECLARE_CLASS_VAR(table, new MTable, 0);
35:
36: // defines for globals
37:
1.203 paf 38: #define SQL_BIND_NAME "bind"
1.182 paf 39: #define SQL_DEFAULT_NAME "default"
40: #define SQL_DISTINCT_NAME "distinct"
41: #define TABLE_REVERSE_NAME "reverse"
42:
43: // globals
44:
1.203 paf 45: String sql_bind_name(SQL_BIND_NAME);
1.214 ! paf 46: String sql_limit_name(PA_SQL_LIMIT_NAME);
! 47: String sql_offset_name(PA_SQL_OFFSET_NAME);
1.182 paf 48: String sql_default_name(SQL_DEFAULT_NAME);
49: String sql_distinct_name(SQL_DISTINCT_NAME);
50: String table_reverse_name(TABLE_REVERSE_NAME);
51:
1.1 paf 52: // methods
1.66 paf 53:
1.182 paf 54: static Table::Action_options get_action_options(Request& r, MethodParams& params,
55: const Table& source) {
1.176 paf 56: Table::Action_options result;
1.182 paf 57: if(!params.count())
58: return result;
59:
60: Value& maybe_options=params.last();
61: /* can not do it:
62: want to enable ^table::create[$source;
63: # $.option[]
64: ]
65: but there is ^table.locate[name;value]
1.176 paf 66:
1.212 paf 67: ...if(voptions.is_defined() && !voptions.is_string()))
1.182 paf 68: if(maybe_options.is_string()) { // allow empty options
69: result.defined=true;
1.176 paf 70: return result;
1.182 paf 71: }
72: */
73: HashStringValue* options=maybe_options.get_hash();
1.176 paf 74: if(!options)
75: return result;
76:
77: result.defined=true;
78: bool defined_offset=false;
79:
80: int valid_options=0;
1.182 paf 81: if(Value* voffset=options->get(sql_offset_name)) {
1.176 paf 82: valid_options++;
83: defined_offset=true;
84: if(voffset->is_string()) {
1.182 paf 85: const String& soffset=*voffset->get_string();
1.176 paf 86: if(soffset == "cur")
87: result.offset=source.current();
88: else
1.164 paf 89: throw Exception("parser.runtime",
1.176 paf 90: &soffset,
91: "must be 'cur' string or expression");
92: } else
93: result.offset=r.process_to_value(*voffset).as_int();
94: }
1.182 paf 95: if(Value* vlimit=options->get(sql_limit_name)) {
1.176 paf 96: valid_options++;
97: result.limit=r.process_to_value(*vlimit).as_int();
98: }
1.182 paf 99: if(Value *vreverse=(Value *)options->get(table_reverse_name)) {
100: valid_options++;
101: result.reverse=r.process_to_value(*vreverse).as_bool();
102: if(result.reverse && !defined_offset)
103: result.offset=source.count()-1;
104: }
105:
106: if(valid_options!=options->count())
1.176 paf 107: throw Exception("parser.runtime",
1.182 paf 108: 0,
1.176 paf 109: "called with invalid option");
110:
111: return result;
112: }
1.180 paf 113: static void check_option_param(bool options_defined,
1.182 paf 114: MethodParams& params, size_t next_param_index,
1.176 paf 115: const char *msg) {
1.182 paf 116: if(next_param_index+(options_defined?1:0) != params.count())
1.176 paf 117: throw Exception("parser.runtime",
1.182 paf 118: 0,
1.176 paf 119: "%s", msg);
1.157 paf 120: }
121:
1.182 paf 122: static void _create(Request& r, MethodParams& params) {
1.157 paf 123: // clone/copy part?
1.182 paf 124: if(Table *source=params[0].get_table()) {
125: Table::Action_options o=get_action_options(r, params, *source);
126: check_option_param(o.defined, params, 1,
1.176 paf 127: "too many parameters");
1.182 paf 128: GET_SELF(r, VTable).set_table(*new Table(*source, o));
1.157 paf 129: return;
130: }
1.142 paf 131:
1.1 paf 132: // data is last parameter
1.182 paf 133: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
134: const String& data=
135: r.process_to_string(params.as_junction(params.count()-1, "body must be code"));
1.44 paf 136:
137: // parse columns
1.182 paf 138: size_t raw_pos_after=0;
139: Table::columns_type columns;
140: if(params.count()==2) {
1.213 paf 141: String snameless=params.as_string(0, "called with two params, first param may only be string 'nameless'");
142: if(snameless!="nameless")
143: throw Exception("parser.runtime",
144: &snameless,
145: "table::create called with two params, first param may only be 'nameless'");
1.182 paf 146: columns=Table::columns_type(0); // nameless
1.21 paf 147: } else {
1.182 paf 148: columns=Table::columns_type(new ArrayString);
1.44 paf 149:
1.182 paf 150: ArrayString head;
151: data.split(head, raw_pos_after, "\n", String::L_AS_IS, 1);
152: if(head.count()) {
153: size_t col_pos_after=0;
154: head[0]->split(*columns, col_pos_after, "\t", String::L_AS_IS);
155: }
1.44 paf 156: }
157:
1.182 paf 158: Table& table=*new Table(columns);
1.44 paf 159: // parse cells
1.182 paf 160:
161: ArrayString rows;
162: data.split(rows, raw_pos_after, "\n", String::L_AS_IS);
163: Array_iterator<const String*> i(rows);
1.98 parser 164: while(i.has_next()) {
1.182 paf 165: Table::element_type row(new ArrayString);
166: const String& string=*i.next();
1.118 parser 167: // remove comment lines
1.182 paf 168: if(!string.length())
1.44 paf 169: continue;
170:
1.182 paf 171: size_t col_pos_after=0;
172: string.split(*row, col_pos_after, "\t", String::L_AS_IS);
173: table+=row;
1.17 paf 174: }
1.1 paf 175:
1.44 paf 176: // replace any previous table value
1.182 paf 177: GET_SELF(r, VTable).set_table(table);
1.44 paf 178: }
179:
1.187 paf 180: struct lsplit_result {
181: char* piece;
182: char delim;
183:
184: operator bool() { return piece!=0; }
185: };
186:
187: inline lsplit_result lsplit(char* string, char delim1, char delim2) {
188: lsplit_result result;
189: if(string) {
190: char delims[]={delim1, delim2, 0};
191: if(char* v=strpbrk(string, delims)) {
192: result.delim=*v;
193: *v=0;
194: result.piece=v+1;
195: return result;
196: }
197: }
198: result.piece=0;
199: result.delim=0;
200: return result;
201: }
202:
203: inline lsplit_result lsplit(char* *string_ref, char delim1, char delim2) {
204: lsplit_result result;
205: result.piece=*string_ref;
206: lsplit_result next=lsplit(*string_ref, delim1, delim2);
207: result.delim=next.delim;
208: *string_ref=next.piece;
209: return result;
210: }
211:
212: static lsplit_result lsplit(char** string_ref, char delim1, char delim2, char encloser) {
213: lsplit_result result;
214:
215: if(char* string=*string_ref) {
216: if(encloser && *string==encloser) {
217: string++;
218:
219: char *read;
220: char *write;
221: write=read=string;
222: char c;
1.193 paf 223: while((c=*read++)) {
1.187 paf 224: if(c==encloser) {
225: char n=*read;
226: if(n==encloser) // double-encloser stands for encloser
227: read++;
228: else if(n==delim1 || n==delim2) {
229: result.delim=n;
230: read++;
231: break;
232: }
233: }
234:
235: *write++=c;
236: }
237: *write=0; // terminate
238: *string_ref=c? read: 0;
239: result.piece=string;
240: return result;
241: } else
242: return lsplit(string_ref, delim1, delim2);
243: }
244: result.piece=0;
245: return result;
246: }
247:
248: static void skip_empty_and_comment_lines( char** data_ref ) {
249: if(char *data=*data_ref) {
250: while( char c=*data ) {
251: if( c== '\n' || c == '#' ) {
252: /*nowhere=*/getrow(&data); // remove empty&comment lines
1.199 paf 253: if(!(*data_ref=data))
254: break;
1.187 paf 255: continue;
256: }
257: break;
258: }
259: }
260: }
261:
262: struct TableSeparators {
1.206 paf 263: char column; const String* scolumn;
264: char encloser; const String* sencloser;
265:
266: TableSeparators():
267: column('\t'), scolumn(new String("\t", false)),
268: encloser(0), sencloser(0)
269: {}
1.214 ! paf 270: int load( HashStringValue& options ) {
! 271: int result=0;
! 272: if(Value* vseparator=options.get(PA_COLUMN_SEPARATOR_NAME)) {
1.206 paf 273: scolumn=&vseparator->as_string();
274: if(scolumn->length()!=1)
1.187 paf 275: throw Exception("parser.runtime",
1.206 paf 276: scolumn,
1.187 paf 277: "separator must be one character long");
1.206 paf 278: column=scolumn->first_char();
1.214 ! paf 279: result++;
1.187 paf 280: }
1.214 ! paf 281: if(Value* vencloser=options.get(PA_COLUMN_ENCLOSER_NAME)) {
1.188 paf 282: sencloser=&vencloser->as_string();
283: if(sencloser->length()!=1)
1.187 paf 284: throw Exception("parser.runtime",
1.188 paf 285: sencloser,
1.187 paf 286: "encloser must be one character long");
1.188 paf 287: encloser=sencloser->first_char();
1.214 ! paf 288: result++;
1.187 paf 289: }
1.214 ! paf 290: return result;
1.187 paf 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) ) {
1.201 paf 339: if(!*sr.piece && !sr.delim && !row->count()) // append last empty column [if without \n]
340: break;
1.187 paf 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);
1.214 ! paf 363: to<<*sencloser; to<<*sencloser; // doubling encloser
1.188 paf 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
1.202 paf 372: to<<from;
1.188 paf 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()) {
1.214 ! paf 396: int valid_options=separators.load(*options);
! 397: if(valid_options!=options->count())
1.188 paf 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())
1.206 paf 420: sdata<<*separators.scolumn;
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,
1.206 paf 428: column<lsize-1?"%d%c":"%d", column, separators.column),
1.185 paf 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())
1.206 paf 443: sdata<<*separators.scolumn;
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:
1.211 paf 479: int offset=params.as_int(params.count()-1, "offset must be expression", r);
480: table.offset(absolute, offset);
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);
1.207 paf 660:
661: result.extract_default();
1.182 paf 662: }
1.74 paf 663: }
1.97 parser 664: r.write_no_lang(result);
1.74 paf 665: }
666:
1.110 parser 667: #ifndef DOXYGEN
1.78 paf 668: struct Table_seq_item {
1.182 paf 669: ArrayString* row;
1.34 paf 670: union {
1.182 paf 671: const char *c_str;
1.34 paf 672: double d;
673: } value;
1.32 paf 674: };
1.110 parser 675: #endif
1.34 paf 676: static int sort_cmp_string(const void *a, const void *b) {
677: return strcmp(
1.78 paf 678: static_cast<const Table_seq_item *>(a)->value.c_str,
679: static_cast<const Table_seq_item *>(b)->value.c_str
1.34 paf 680: );
681: }
682: static int sort_cmp_double(const void *a, const void *b) {
1.78 paf 683: double va=static_cast<const Table_seq_item *>(a)->value.d;
684: double vb=static_cast<const Table_seq_item *>(b)->value.d;
1.34 paf 685: if(va<vb)
686: return -1;
687: else if(va>vb)
688: return +1;
689: else
690: return 0;
691: }
1.182 paf 692: static void _sort(Request& r, MethodParams& params) {
693: Value& key_maker=params.as_junction(0, "key-maker must be code");
1.61 paf 694:
1.182 paf 695: bool reverse=params.count()>1/*..[desc|asc|]*/?
696: reverse=params.as_no_junction(1, "order must not be code").as_string()=="desc":
1.104 parser 697: false; // default=asc
1.32 paf 698:
1.182 paf 699: Table& old_table=GET_SELF(r, VTable).table();
700: Table& new_table=*new Table(old_table.columns());
1.34 paf 701:
1.182 paf 702: Table_seq_item* seq=new(PointerFreeGC) Table_seq_item[old_table.count()];
1.34 paf 703: int i;
704:
705: // calculate key values
706: bool key_values_are_strings=true;
1.182 paf 707: int old_count=old_table.count();
708: for(i=0; i<old_count; i++) {
1.101 parser 709: old_table.set_current(i);
1.32 paf 710: // calculate key value
1.182 paf 711: seq[i].row=old_table[i];
712: Value& value=r.process_to_value(key_maker).as_expr_result(true/*return string as-is*/);
1.34 paf 713: if(i==0) // determining key values type by first one
714: key_values_are_strings=value.is_string();
715:
716: if(key_values_are_strings)
717: seq[i].value.c_str=value.as_string().cstr();
718: else
719: seq[i].value.d=value.as_double();
1.32 paf 720: }
721: // sort keys
1.182 paf 722: _qsort(seq, old_count, sizeof(Table_seq_item),
1.34 paf 723: key_values_are_strings?sort_cmp_string:sort_cmp_double);
1.32 paf 724:
1.34 paf 725: // reorder table as they require in 'seq'
1.182 paf 726: for(i=0; i<old_count; i++)
727: new_table+=Table::element_type(seq[reverse?old_count-1-i:i].row);
728:
729: delete[] seq;
1.32 paf 730:
1.116 parser 731: // replace any previous table value
1.182 paf 732: GET_SELF(r, VTable).set_table(new_table);
1.32 paf 733: }
734:
1.176 paf 735: #ifndef DOXYGEN
1.182 paf 736: struct Expression_is_true_info {
1.176 paf 737: Request* r;
738: Value* expression_code;
739: };
740: #endif
1.191 paf 741: static bool expression_is_true(Table&, Expression_is_true_info* info) {
742: return info->r->process_to_value(*info->expression_code).as_bool();
1.176 paf 743: }
744: static bool _locate_expression(Table& table, Table::Action_options o,
1.182 paf 745: Request& r, MethodParams& params) {
746: check_option_param(o.defined, params, 1,
1.176 paf 747: "locate by expression only has parameters: expression and, maybe, options");
1.182 paf 748: Value& expression_code=params.as_junction(0, "must be expression");
1.145 paf 749:
1.182 paf 750: Expression_is_true_info info={&r, &expression_code};
751: return table.table_first_that(expression_is_true, &info, o);
1.145 paf 752: }
1.176 paf 753: static bool _locate_name_value(Table& table, Table::Action_options o,
1.191 paf 754: Request&, MethodParams& params) {
1.182 paf 755: check_option_param(o.defined, params, 2,
1.176 paf 756: "locate by locate by name has parameters: name, value and, maybe, options");
1.182 paf 757: const String& name=params.as_string(0, "column name must be string");
758: const String& value=params.as_string(1, "value must be string");
759: return table.locate(name, value, o);
760: }
761: static void _locate(Request& r, MethodParams& params) {
762: Table& table=GET_SELF(r, VTable).table();
1.72 paf 763:
1.182 paf 764: Table::Action_options o=get_action_options(r, params, table);
765:
766: bool result=params[0].get_junction()?
767: _locate_expression(table, o, r, params) :
768: _locate_name_value(table, o, r, params);
769: r.write_no_lang(*new VBool(result));
1.145 paf 770: }
1.182 paf 771:
772:
1.191 paf 773: static void _flip(Request& r, MethodParams&) {
1.182 paf 774: Table& old_table=GET_SELF(r, VTable).table();
1.184 paf 775: Table& new_table=*new Table(0);
1.182 paf 776: if(size_t old_count=old_table.count())
777: if(size_t old_cols=old_table[0]->count())
778: for(size_t column=0; column<old_cols; column++) {
779: Table::element_type new_row(new ArrayString(old_count));
780: for(size_t i=0; i<old_count; i++) {
781: Table::element_type old_row=old_table[i];
782: *new_row+=column<old_row->count()?old_row->get(column):new String;
1.39 paf 783: }
1.182 paf 784: new_table+=new_row;
1.39 paf 785: }
786:
1.182 paf 787: r.write_no_lang(*new VTable(&new_table));
1.39 paf 788: }
789:
1.182 paf 790: static void _append(Request& r, MethodParams& params) {
1.134 paf 791: // data
1.182 paf 792: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
793: const String& string=r.process_to_string(params.as_junction(0, "body must be code"));
1.41 paf 794:
795: // parse cells
1.182 paf 796: Table::element_type row=new ArrayString;
797: size_t pos_after=0;
798: string.split(*row, pos_after, "\t", String::L_AS_IS);
1.41 paf 799:
1.182 paf 800: GET_SELF(r, VTable).table()+=row;
1.41 paf 801: }
802:
1.182 paf 803: static void join_named_row(Table& src, Table* dest) {
804: Table::columns_type dest_columns=dest->columns();
805: size_t dest_columns_count=dest_columns->count();
806: Table::element_type dest_row(new ArrayString(dest_columns_count));
807: for(size_t dest_column=0; dest_column<dest_columns_count; dest_column++) {
808: const String* src_item=src.item(*dest_columns->get(dest_column));
809: *dest_row+=src_item?src_item:new String;
810: }
811: *dest+=dest_row;
812: }
813: static void join_nameless_row(Table& src, Table* dest) {
814: *dest+=src[src.current()];
815: }
816: static void _join(Request& r, MethodParams& params) {
817: Table* maybe_src=params.as_no_junction(0, "table ref must not be code").get_table();
1.42 paf 818: if(!maybe_src)
1.146 paf 819: throw Exception("parser.runtime",
1.182 paf 820: 0,
1.42 paf 821: "source is not a table");
1.176 paf 822: Table& src=*maybe_src;
823:
1.182 paf 824: Table::Action_options o=get_action_options(r, params, src);
825: check_option_param(o.defined, params, 1,
1.176 paf 826: "invalid extra parameter");
1.42 paf 827:
1.182 paf 828: Table& dest=GET_SELF(r, VTable).table();
1.42 paf 829: if(&src == &dest)
1.146 paf 830: throw Exception("parser.runtime",
1.182 paf 831: 0,
1.42 paf 832: "source and destination are same table");
833:
1.193 paf 834: if(dest.columns()) // dest is named
1.182 paf 835: src.table_for_each(join_named_row, &dest, o);
836: else // dest is nameless
837: src.table_for_each(join_nameless_row, &dest, o);
1.42 paf 838: }
839:
1.94 parser 840: #ifndef DOXYGEN
1.169 paf 841: class Table_sql_event_handlers: public SQL_Driver_query_event_handlers {
1.182 paf 842: ArrayString& columns;
843: ArrayString* row;
1.94 parser 844: public:
1.182 paf 845: Table* table;
846: public:
847: Table_sql_event_handlers() :
848: columns(*new ArrayString), row(0), table(0) {
1.94 parser 849: }
850:
1.182 paf 851: bool add_column(SQL_Error& error, const char *str, size_t length) {
1.170 paf 852: try {
1.182 paf 853: columns+=new String(str, length, true);
1.170 paf 854: return false;
855: } catch(...) {
856: error=SQL_Error("exception occured in Table_sql_event_handlers::add_column");
857: return true;
858: }
859: }
860: bool before_rows(SQL_Error& error) {
861: try {
1.182 paf 862: table=new Table(&columns);
1.170 paf 863: return false;
864: } catch(...) {
865: error=SQL_Error("exception occured in Table_sql_event_handlers::before_rows");
866: return true;
867: }
868: }
869: bool add_row(SQL_Error& error) {
870: try {
1.182 paf 871: *table+=row=new ArrayString;
1.170 paf 872: return false;
873: } catch(...) {
874: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row");
875: return true;
876: }
877: }
1.182 paf 878: bool add_row_cell(SQL_Error& error, const char* str, size_t length) {
1.170 paf 879: try {
1.182 paf 880: String& cell=*new String;
881: if(length)
882: cell.append_know_length(str, length, String::L_TAINTED);
883: *row+=&cell;
1.170 paf 884: return false;
885: } catch(...) {
886: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row_cell");
887: return true;
888: }
1.94 parser 889: }
890: };
891: #endif
1.204 paf 892:
893: static void marshal_bind(
894: HashStringValue::key_type aname,
895: HashStringValue::value_type avalue,
896: SQL_Driver::Placeholder** pptr)
897: {
898: SQL_Driver::Placeholder& ph=**pptr;
899: ph.name=aname.cstr();
1.205 paf 900: ph.value=avalue->as_string().cstr(String::L_UNSPECIFIED);
1.204 paf 901: ph.is_null=avalue->get_class()==void_class;
902: ph.were_updated=false;
903:
904: (*pptr)++;
905: }
906:
907: // not static, used elsewhere
908: int marshal_binds(HashStringValue& hash, SQL_Driver::Placeholder*& placeholders) {
909: int hash_count=hash.count();
910: placeholders=new(UseGC) SQL_Driver::Placeholder[hash_count];
911: SQL_Driver::Placeholder* ptr=placeholders;
912: hash.for_each(marshal_bind, &ptr);
913: return hash_count;
914: }
915:
916: // not static, used elsewhere
917: void unmarshal_bind_updates(HashStringValue& hash, int placeholder_count, SQL_Driver::Placeholder* placeholders) {
918: SQL_Driver::Placeholder* ph=placeholders;
919: for(int i=0; i<placeholder_count; i++, ph++)
920: if(ph->were_updated) {
921: Value* value;
922: if(ph->is_null)
923: value=new VVoid();
924: else
925: if(ph->value)
926: value=new VString(*new String(ph->value, 0, true/*tainted*/));
927: else
928: value=new VString(*new String());
929: hash.put(ph->name, value);
930: }
931: }
932:
1.182 paf 933: static void _sql(Request& r, MethodParams& params) {
934: Value& statement=params.as_junction(0, "statement must be code");
1.49 paf 935:
1.204 paf 936: HashStringValue* bind=0;
1.53 paf 937: ulong limit=0;
1.100 parser 938: ulong offset=0;
1.182 paf 939: if(params.count()>1) {
940: Value& voptions=params.as_no_junction(1, "options must be hash, not code");
1.212 paf 941: if(voptions.is_defined() && !voptions.is_string())
1.182 paf 942: if(HashStringValue* options=voptions.get_hash()) {
1.164 paf 943: int valid_options=0;
1.204 paf 944: if(Value* vbind=options->get(sql_bind_name)) {
945: valid_options++;
946: bind=vbind->get_hash();
947: }
1.182 paf 948: if(Value* vlimit=options->get(sql_limit_name)) {
1.164 paf 949: valid_options++;
1.147 paf 950: limit=(ulong)r.process_to_value(*vlimit).as_double();
1.164 paf 951: }
1.182 paf 952: if(Value* voffset=options->get(sql_offset_name)) {
1.164 paf 953: valid_options++;
1.147 paf 954: offset=(ulong)r.process_to_value(*voffset).as_double();
1.164 paf 955: }
1.182 paf 956: if(valid_options!=options->count())
1.164 paf 957: throw Exception("parser.runtime",
1.182 paf 958: 0,
1.164 paf 959: "called with invalid option");
1.109 parser 960: } else
1.146 paf 961: throw Exception("parser.runtime",
1.182 paf 962: 0,
1.109 parser 963: "options must be hash");
1.49 paf 964: }
965:
1.204 paf 966: SQL_Driver::Placeholder* placeholders=0;
967: uint placeholders_count=0;
968: if(bind)
969: placeholders_count=marshal_binds(*bind, placeholders);
970:
1.182 paf 971: Temp_lang temp_lang(r, String::L_SQL);
972: const String& statement_string=r.process_to_string(statement);
973: const char* statement_cstr=
974: statement_string.cstr(String::L_UNSPECIFIED, r.connection());
975: Table_sql_event_handlers handlers;
1.135 paf 976: #ifdef RESOURCES_DEBUG
977: struct timeval mt[2];
978: //measure:before
979: gettimeofday(&mt[0],NULL);
980: #endif
1.182 paf 981: r.connection()->query(
1.203 paf 982: statement_cstr,
1.208 paf 983: placeholders_count, placeholders,
1.203 paf 984: offset, limit,
1.160 paf 985: handlers,
986: statement_string);
1.135 paf 987:
988: #ifdef RESOURCES_DEBUG
989: //measure:after connect
990: gettimeofday(&mt[1],NULL);
991:
992: double t[2];
993: for(int i=0;i<2;i++)
994: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
995:
996: r.sql_request_time+=t[1]-t[0];
997: #endif
1.204 paf 998:
999: if(bind)
1000: unmarshal_bind_updates(*bind, placeholders_count, placeholders);
1.96 parser 1001:
1.182 paf 1002: Table& result=
1003: handlers.table?*handlers.table: // query resulted in table? return it
1004: *new Table(Table::columns_type(0)); // query returned no table, fake it
1.49 paf 1005:
1006: // replace any previous table value
1.182 paf 1007: GET_SELF(r, VTable).set_table(result);
1.49 paf 1008: }
1009:
1.182 paf 1010: static void _columns(Request& r, MethodParams&) {
1.88 parser 1011:
1.182 paf 1012: Table::columns_type result_columns(new ArrayString);
1013: *result_columns+=new String("column");
1014: Table& result_table=*new Table(result_columns);
1.88 parser 1015:
1.182 paf 1016: Table& source_table=GET_SELF(r, VTable).table();
1017: if(Table::columns_type source_columns=source_table.columns()) {
1018: for(Array_iterator<const String*> i(*source_columns); i.has_next(); ) {
1019: Table::element_type result_row(new ArrayString);
1020: *result_row+=i.next();
1021: result_table+=result_row;
1.88 parser 1022: }
1023: }
1024:
1.182 paf 1025: r.write_no_lang(*new VTable(&result_table));
1.88 parser 1026: }
1027:
1.182 paf 1028: static void _select(Request& r, MethodParams& params) {
1029: Value& vcondition=params.as_junction(0, "condition must be expression");
1.148 paf 1030:
1.182 paf 1031: Table& source_table=GET_SELF(r, VTable).table();
1032: Table& result_table=*new Table(source_table.columns());
1.148 paf 1033:
1034: int saved_current=source_table.current();
1.182 paf 1035: int size=source_table.count();
1.148 paf 1036: for(int row=0; row<size; row++) {
1037: source_table.set_current(row);
1038:
1.150 paf 1039: bool condition=r.process_to_value(vcondition,
1.148 paf 1040: false/*don't intercept string*/).as_bool();
1041:
1042: if(condition) // ...condition is true=
1.182 paf 1043: result_table+=source_table[row]; // =green light to go to result
1.148 paf 1044: }
1045: source_table.set_current(saved_current);
1046:
1.182 paf 1047: r.write_no_lang(*new VTable(&result_table));
1.148 paf 1048: }
1049:
1.66 paf 1050: // constructor
1051:
1.182 paf 1052: MTable::MTable(): Methoded("table") {
1.142 paf 1053: // ^table::create{data}
1054: // ^table::create[nameless]{data}
1055: // ^table::create[table]
1056: add_native_method("create", Method::CT_DYNAMIC, _create, 1, 2);
1057: // old name for compatibility with <= v 1.141 2002/01/25 11:33:45 paf
1058: add_native_method("set", Method::CT_DYNAMIC, _create, 1, 2);
1.2 paf 1059:
1.142 paf 1060: // ^table::load[file]
1061: // ^table::load[nameless;file]
1.168 paf 1062: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 3);
1.22 paf 1063:
1064: // ^table.save[file]
1065: // ^table.save[nameless;file]
1.188 paf 1066: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 3);
1.6 paf 1067:
1068: // ^table.count[]
1.66 paf 1069: add_native_method("count", Method::CT_DYNAMIC, _count, 0, 0);
1.6 paf 1070:
1071: // ^table.line[]
1.66 paf 1072: add_native_method("line", Method::CT_DYNAMIC, _line, 0, 0);
1.6 paf 1073:
1.10 paf 1074: // ^table.offset[]
1.133 paf 1075: // ^table.offset(offset)
1076: // ^table.offset[cur|set](offset)
1077: add_native_method("offset", Method::CT_DYNAMIC, _offset, 0, 2);
1.7 paf 1078:
1.10 paf 1079: // ^table.menu{code}
1080: // ^table.menu{code}[delim]
1.66 paf 1081: add_native_method("menu", Method::CT_DYNAMIC, _menu, 1, 2);
1.74 paf 1082:
1.79 paf 1083: // ^table:hash[key field name]
1.123 parser 1084: // ^table:hash[key field name][value field name(s) string/table]
1.163 paf 1085: add_native_method("hash", Method::CT_DYNAMIC, _hash, 1, 3);
1.32 paf 1086:
1.102 parser 1087: // ^table.sort{string-key-maker} ^table.sort{string-key-maker}[desc|asc]
1088: // ^table.sort(numeric-key-maker) ^table.sort(numeric-key-maker)[desc|asc]
1.66 paf 1089: add_native_method("sort", Method::CT_DYNAMIC, _sort, 1, 2);
1.8 paf 1090:
1.36 paf 1091: // ^table.locate[field;value]
1.176 paf 1092: add_native_method("locate", Method::CT_DYNAMIC, _locate, 1, 3);
1.39 paf 1093:
1094: // ^table.flip[]
1.66 paf 1095: add_native_method("flip", Method::CT_DYNAMIC, _flip, 0, 0);
1.41 paf 1096:
1097: // ^table.append{r{tab}e{tab}c{tab}o{tab}r{tab}d}
1.66 paf 1098: add_native_method("append", Method::CT_DYNAMIC, _append, 1, 1);
1.42 paf 1099:
1.157 paf 1100: // ^table.join[table][$.limit(10) $.offset(1) $.offset[cur] ]
1101: add_native_method("join", Method::CT_DYNAMIC, _join, 1, 2);
1.49 paf 1102:
1103:
1.100 parser 1104: // ^table:sql[query]
1105: // ^table:sql[query][$.limit(1) $.offset(2)]
1106: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.88 parser 1107:
1108: // ^table:columns[]
1109: add_native_method("columns", Method::CT_DYNAMIC, _columns, 0, 0);
1.148 paf 1110:
1111: // ^table.select(expression) = table
1112: add_native_method("select", Method::CT_DYNAMIC, _select, 1, 1);
1.40 paf 1113: }
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