Annotation of parser3/src/classes/table.C, revision 1.187
1.20 paf 1: /** @file
1.47 paf 2: Parser: @b table parser class.
1.20 paf 3:
1.182 paf 4: Copyright (c) 2001-2003 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:
1.187 ! paf 8: static const char* IDENT_TABLE_C="$Date: 2003/11/03 13:20:30 $";
1.1 paf 9:
1.105 parser 10: #include "classes.h"
1.182 paf 11: #include "pa_vmethod_frame.h"
12:
1.16 paf 13: #include "pa_common.h"
1.1 paf 14: #include "pa_request.h"
15: #include "pa_vtable.h"
1.6 paf 16: #include "pa_vint.h"
1.51 paf 17: #include "pa_sql_connection.h"
1.72 paf 18: #include "pa_vbool.h"
1.1 paf 19:
1.66 paf 20: // class
21:
1.182 paf 22: class MTable: public Methoded {
1.66 paf 23: public: // VStateless_class
1.182 paf 24: Value* create_new_value() { return new VTable(); }
1.66 paf 25:
26: public:
1.182 paf 27: MTable();
1.70 paf 28:
29: public: // Methoded
1.66 paf 30: bool used_directly() { return true; }
31: };
1.1 paf 32:
1.182 paf 33: // global variable
34:
35: DECLARE_CLASS_VAR(table, new MTable, 0);
36:
37: // defines for globals
38:
39: #define SQL_LIMIT_NAME "limit"
40: #define SQL_OFFSET_NAME "offset"
41: #define SQL_DEFAULT_NAME "default"
42: #define SQL_DISTINCT_NAME "distinct"
43: #define TABLE_REVERSE_NAME "reverse"
44:
45: // globals
46:
47: String sql_limit_name(SQL_LIMIT_NAME);
48: String sql_offset_name(SQL_OFFSET_NAME);
49: String sql_default_name(SQL_DEFAULT_NAME);
50: String sql_distinct_name(SQL_DISTINCT_NAME);
51: String table_reverse_name(TABLE_REVERSE_NAME);
52:
1.186 paf 53: // local defines
54:
1.187 ! paf 55: #define COLUMN_SEPARATOR_NAME "separator"
! 56: #define COLUMN_ENCLOSER_NAME "encloser"
1.186 paf 57:
58:
1.1 paf 59: // methods
1.66 paf 60:
1.182 paf 61: static Table::Action_options get_action_options(Request& r, MethodParams& params,
62: const Table& source) {
1.176 paf 63: Table::Action_options result;
1.182 paf 64: if(!params.count())
65: return result;
66:
67: Value& maybe_options=params.last();
68: /* can not do it:
69: want to enable ^table::create[$source;
70: # $.option[]
71: ]
72: but there is ^table.locate[name;value]
1.176 paf 73:
1.182 paf 74: if(maybe_options.is_string()) { // allow empty options
75: result.defined=true;
1.176 paf 76: return result;
1.182 paf 77: }
78: */
79: HashStringValue* options=maybe_options.get_hash();
1.176 paf 80: if(!options)
81: return result;
82:
83: result.defined=true;
84: bool defined_offset=false;
85:
86: int valid_options=0;
1.182 paf 87: if(Value* voffset=options->get(sql_offset_name)) {
1.176 paf 88: valid_options++;
89: defined_offset=true;
90: if(voffset->is_string()) {
1.182 paf 91: const String& soffset=*voffset->get_string();
1.176 paf 92: if(soffset == "cur")
93: result.offset=source.current();
94: else
1.164 paf 95: throw Exception("parser.runtime",
1.176 paf 96: &soffset,
97: "must be 'cur' string or expression");
98: } else
99: result.offset=r.process_to_value(*voffset).as_int();
100: }
1.182 paf 101: if(Value* vlimit=options->get(sql_limit_name)) {
1.176 paf 102: valid_options++;
103: result.limit=r.process_to_value(*vlimit).as_int();
104: }
1.182 paf 105: if(Value *vreverse=(Value *)options->get(table_reverse_name)) {
106: valid_options++;
107: result.reverse=r.process_to_value(*vreverse).as_bool();
108: if(result.reverse && !defined_offset)
109: result.offset=source.count()-1;
110: }
111:
112: if(valid_options!=options->count())
1.176 paf 113: throw Exception("parser.runtime",
1.182 paf 114: 0,
1.176 paf 115: "called with invalid option");
116:
117: return result;
118: }
1.180 paf 119: static void check_option_param(bool options_defined,
1.182 paf 120: MethodParams& params, size_t next_param_index,
1.176 paf 121: const char *msg) {
1.182 paf 122: if(next_param_index+(options_defined?1:0) != params.count())
1.176 paf 123: throw Exception("parser.runtime",
1.182 paf 124: 0,
1.176 paf 125: "%s", msg);
1.157 paf 126: }
127:
1.182 paf 128: static void _create(Request& r, MethodParams& params) {
1.157 paf 129: // clone/copy part?
1.182 paf 130: if(Table *source=params[0].get_table()) {
131: Table::Action_options o=get_action_options(r, params, *source);
132: check_option_param(o.defined, params, 1,
1.176 paf 133: "too many parameters");
1.182 paf 134: GET_SELF(r, VTable).set_table(*new Table(*source, o));
1.157 paf 135: return;
136: }
1.142 paf 137:
1.1 paf 138: // data is last parameter
1.182 paf 139: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
140: const String& data=
141: r.process_to_string(params.as_junction(params.count()-1, "body must be code"));
1.44 paf 142:
143: // parse columns
1.182 paf 144: size_t raw_pos_after=0;
145: Table::columns_type columns;
146: if(params.count()==2) {
147: columns=Table::columns_type(0); // nameless
1.21 paf 148: } else {
1.182 paf 149: columns=Table::columns_type(new ArrayString);
1.44 paf 150:
1.182 paf 151: ArrayString head;
152: data.split(head, raw_pos_after, "\n", String::L_AS_IS, 1);
153: if(head.count()) {
154: size_t col_pos_after=0;
155: head[0]->split(*columns, col_pos_after, "\t", String::L_AS_IS);
156: }
1.44 paf 157: }
158:
1.182 paf 159: Table& table=*new Table(columns);
1.44 paf 160: // parse cells
1.182 paf 161:
162: ArrayString rows;
163: data.split(rows, raw_pos_after, "\n", String::L_AS_IS);
164: Array_iterator<const String*> i(rows);
1.98 parser 165: while(i.has_next()) {
1.182 paf 166: Table::element_type row(new ArrayString);
167: const String& string=*i.next();
1.118 parser 168: // remove comment lines
1.182 paf 169: if(!string.length())
1.44 paf 170: continue;
171:
1.182 paf 172: size_t col_pos_after=0;
173: string.split(*row, col_pos_after, "\t", String::L_AS_IS);
174: table+=row;
1.17 paf 175: }
1.1 paf 176:
1.44 paf 177: // replace any previous table value
1.182 paf 178: GET_SELF(r, VTable).set_table(table);
1.44 paf 179: }
180:
1.187 ! paf 181: static char* remove_encloser(char* cstr, char encloser) {
1.186 paf 182: if(cstr[0]!=encloser)
183: return cstr;
184:
185: size_t length=strlen(cstr);
186: if(length<2 || cstr[length-1]!=encloser)
187: return cstr;
188:
189: // 'string'
190:
191: cstr[length-1]=0;
192: cstr++;
193:
194: // double-encloser stands for encloser
195: char *read;
196: char *write;
197: write=read=cstr;
198: while(char c=*read++) {
199: if(c==encloser && *read==encloser)
200: read++;
201:
202: *write++=c;
203: }
204: *write=0; // terminate
205:
206: return cstr;
207: }
208:
1.187 ! paf 209: struct lsplit_result {
! 210: char* piece;
! 211: char delim;
! 212:
! 213: operator bool() { return piece!=0; }
! 214: };
! 215:
! 216: inline lsplit_result lsplit(char* string, char delim1, char delim2) {
! 217: lsplit_result result;
! 218: if(string) {
! 219: char delims[]={delim1, delim2, 0};
! 220: if(char* v=strpbrk(string, delims)) {
! 221: result.delim=*v;
! 222: *v=0;
! 223: result.piece=v+1;
! 224: return result;
! 225: }
! 226: }
! 227: result.piece=0;
! 228: result.delim=0;
! 229: return result;
! 230: }
! 231:
! 232: inline lsplit_result lsplit(char* *string_ref, char delim1, char delim2) {
! 233: lsplit_result result;
! 234: result.piece=*string_ref;
! 235: lsplit_result next=lsplit(*string_ref, delim1, delim2);
! 236: result.delim=next.delim;
! 237: *string_ref=next.piece;
! 238: return result;
! 239: }
! 240:
! 241: static lsplit_result lsplit(char** string_ref, char delim1, char delim2, char encloser) {
! 242: lsplit_result result;
! 243:
! 244: if(char* string=*string_ref) {
! 245: if(encloser && *string==encloser) {
! 246: string++;
! 247:
! 248: char *read;
! 249: char *write;
! 250: write=read=string;
! 251: char c;
! 252: while(c=*read++) {
! 253: if(c==encloser) {
! 254: char n=*read;
! 255: if(n==encloser) // double-encloser stands for encloser
! 256: read++;
! 257: else if(n==delim1 || n==delim2) {
! 258: result.delim=n;
! 259: read++;
! 260: break;
! 261: }
! 262: }
! 263:
! 264: *write++=c;
! 265: }
! 266: *write=0; // terminate
! 267: *string_ref=c? read: 0;
! 268: result.piece=string;
! 269: return result;
! 270: } else
! 271: return lsplit(string_ref, delim1, delim2);
! 272: }
! 273: result.piece=0;
! 274: return result;
! 275: }
! 276:
! 277: static void skip_empty_and_comment_lines( char** data_ref ) {
! 278: if(char *data=*data_ref) {
! 279: while( char c=*data ) {
! 280: if( c== '\n' || c == '#' ) {
! 281: /*nowhere=*/getrow(&data); // remove empty&comment lines
! 282: *data_ref=data;
! 283: continue;
! 284: }
! 285: break;
! 286: }
! 287: }
! 288: }
! 289:
! 290: struct TableSeparators {
! 291: char column;
! 292: char encloser;
! 293:
! 294: TableSeparators() {
! 295: column='\t';
! 296: encloser=0;
! 297: }
! 298: void load( HashStringValue& options ) {
! 299: if(Value* vseparator=options.get(COLUMN_SEPARATOR_NAME)) {
! 300: options.remove(COLUMN_SEPARATOR_NAME);
! 301: const String& sseparator=vseparator->as_string();
! 302: if(sseparator.length()!=1)
! 303: throw Exception("parser.runtime",
! 304: &sseparator,
! 305: "separator must be one character long");
! 306: column=sseparator.first_char();
! 307: }
! 308: if(Value* vencloser=options.get(COLUMN_ENCLOSER_NAME)) {
! 309: options.remove(COLUMN_ENCLOSER_NAME);
! 310: const String& sencloser=vencloser->as_string();
! 311: if(sencloser.length()!=1)
! 312: throw Exception("parser.runtime",
! 313: &sencloser,
! 314: "encloser must be one character long");
! 315: encloser=sencloser.first_char();
! 316: }
! 317: }
! 318: };
! 319:
1.182 paf 320: static void _load(Request& r, MethodParams& params) {
321: const String& first_param=params.as_string(0, "file name must be string");
1.168 paf 322: int filename_param_index=0;
323: bool nameless=first_param=="nameless";
324: if(nameless)
325: filename_param_index++;
1.182 paf 326: size_t options_param_index=filename_param_index+1;
1.186 paf 327:
328: HashStringValue *options=0;
1.187 ! paf 329: TableSeparators separators;
1.186 paf 330: if(options_param_index<params.count()
331: && (options=params.as_no_junction(options_param_index, "additional params must be hash").get_hash())) {
332: // cloning, so that we could change [to simplify checks on params inside file_read_text
333: options=new HashStringValue(*options);
1.187 ! paf 334: separators.load(*options);
1.186 paf 335: }
336:
1.44 paf 337: // loading text
1.182 paf 338: char *data=file_read_text(r.charsets,
339: r.absolute(params.as_string(filename_param_index, "file name must be string")),
1.168 paf 340: true,
1.186 paf 341: options
1.168 paf 342: );
1.44 paf 343:
1.1 paf 344: // parse columns
1.182 paf 345: Table::columns_type columns;
1.168 paf 346: if(nameless) {
1.182 paf 347: columns=Table::columns_type(0); // nameless
1.1 paf 348: } else {
1.182 paf 349: columns=Table::columns_type(new ArrayString);
1.1 paf 350:
1.187 ! paf 351: skip_empty_and_comment_lines(&data);
! 352: while( lsplit_result sr=lsplit(&data, separators.column, '\n', separators.encloser) ) {
! 353: *columns+=new String(sr.piece, 0, true);
! 354: if(sr.delim=='\n')
! 355: break;
1.139 paf 356: }
1.1 paf 357: }
1.187 ! paf 358:
! 359: Table& table=*new Table(columns);
1.1 paf 360:
361: // parse cells
1.187 ! paf 362: Table::element_type row(new ArrayString);
! 363: skip_empty_and_comment_lines(&data);
! 364: while( lsplit_result sr=lsplit(&data, separators.column, '\n', separators.encloser) ) {
! 365: if(!sr.delim && !row->count()) // append last empty column [if without \n]
! 366: break;
! 367: *row+=new String(sr.piece, 0, true);
! 368: if(sr.delim=='\n') {
! 369: table+=row;
! 370: row=new ArrayString;
! 371: skip_empty_and_comment_lines(&data);
1.1 paf 372: }
1.187 ! paf 373: }
! 374: // last line [if without \n]
! 375: if(row->count())
1.1 paf 376: table+=row;
1.187 ! paf 377:
1.1 paf 378: // replace any previous table value
1.182 paf 379: GET_SELF(r, VTable).set_table(table);
1.1 paf 380: }
1.2 paf 381:
1.146 paf 382: /// @todo "x\nx" "xxx""xx"
1.182 paf 383: static void _save(Request& r, MethodParams& params) {
384: Value& vfile_name=params.as_no_junction(params.count()-1, "file name must not be code");
1.22 paf 385:
1.182 paf 386: Table& table=GET_SELF(r, VTable).table();
1.31 paf 387:
1.129 paf 388: bool do_append=false;
1.182 paf 389: String sdata;
390: if(params.count()==1) { // named output
1.31 paf 391: // write out names line
392: if(table.columns()) { // named table
1.182 paf 393: for(Array_iterator<const String*> i(*table.columns()); i.has_next(); ) {
394: sdata.append(*i.next(), String::L_TABLE);
1.98 parser 395: if(i.has_next())
1.182 paf 396: sdata.append_know_length("\t", 1, String::L_CLEAN);
1.31 paf 397: }
398: } else { // nameless table
1.182 paf 399: if(int lsize=table.count()?table[0]->count():0)
1.31 paf 400: for(int column=0; column<lsize; column++) {
1.182 paf 401: char *cindex_tab=new(PointerFreeGC) char[MAX_NUMBER];
402: sdata.append_know_length(cindex_tab,
1.185 paf 403: snprintf(cindex_tab, MAX_NUMBER,
404: column<lsize-1?"%d\t":"%d", column),
405: String::L_CLEAN);
1.31 paf 406: }
407: else
1.182 paf 408: sdata.append_help_length("empty nameless table", 0, String::L_CLEAN);
1.31 paf 409: }
1.182 paf 410: sdata.append_know_length("\n", 1, String::L_CLEAN);
1.129 paf 411: } else { // mode specified
1.182 paf 412: const String& mode=params.as_string(0, "mode must be string");
1.129 paf 413: if(mode=="append")
414: do_append=true;
415: else if(mode=="nameless")
416: /*ok, already skipped names output*/;
417: else
1.146 paf 418: throw Exception("parser.runtime",
1.129 paf 419: &mode,
420: "unknown mode, must be 'append'");
421:
1.31 paf 422: }
423: // data lines
1.182 paf 424: Array_iterator<ArrayString*> i(table);
1.98 parser 425: while(i.has_next()) {
1.182 paf 426: for(Array_iterator<const String*> c(*i.next()); c.has_next(); ) {
427: sdata.append(*c.next(), String::L_TABLE);
1.98 parser 428: if(c.has_next())
1.182 paf 429: sdata.append_know_length("\t", 1, String::L_CLEAN);
1.31 paf 430: }
1.182 paf 431: sdata.append_know_length("\n", 1, String::L_CLEAN);
1.31 paf 432: }
433:
434: // write
1.141 paf 435: file_write(r.absolute(vfile_name.as_string()),
1.182 paf 436: sdata.cstr(), sdata.length(), true, do_append);
1.22 paf 437: }
438:
1.182 paf 439: static void _count(Request& r, MethodParams&) {
440: int result=GET_SELF(r, VTable).table().count();
441: r.write_no_lang(*new VInt(result));
1.6 paf 442: }
443:
1.182 paf 444: static void _line(Request& r, MethodParams&) {
445: int result=1+GET_SELF(r, VTable).table().current();
446: r.write_no_lang(*new VInt(result));
1.6 paf 447: }
448:
1.182 paf 449: static void _offset(Request& r, MethodParams& params) {
450: Table& table=GET_SELF(r, VTable).table();
451: if(params.count()) {
1.133 paf 452: bool absolute=false;
1.182 paf 453: if(params.count()>1) {
454: const String& whence=params.as_string(0, "whence must be string");
1.133 paf 455: if(whence=="cur")
1.134 paf 456: absolute=false;
1.133 paf 457: else if(whence=="set")
1.134 paf 458: absolute=true;
1.133 paf 459: else
1.146 paf 460: throw Exception("parser.runtime",
1.134 paf 461: &whence,
462: "is invalid whence, valid are 'cur' or 'set'");
1.157 paf 463: }
1.133 paf 464:
1.182 paf 465: Value& offset_expr=params.as_junction(params.count()-1, "offset must be expression");
1.147 paf 466: table.offset(absolute, r.process_to_value(offset_expr).as_int());
1.151 paf 467: } else
1.182 paf 468: r.write_no_lang(*new VInt(table.current()));
1.6 paf 469: }
470:
1.182 paf 471: static void _menu(Request& r, MethodParams& params) {
472: Value& body_code=params.as_junction(0, "body must be code");
1.7 paf 473:
1.182 paf 474: Value* delim_maybe_code=params.count()>1?¶ms[1]:0;
1.7 paf 475:
1.182 paf 476: Table& table=GET_SELF(r, VTable).table();
1.7 paf 477: bool need_delim=false;
1.99 parser 478: int saved_current=table.current();
1.182 paf 479: int size=table.count();
1.99 parser 480: for(int row=0; row<size; row++) {
1.22 paf 481: table.set_current(row);
1.7 paf 482:
1.161 paf 483: StringOrValue sv_processed=r.process(body_code);
1.182 paf 484: const String* s_processed=sv_processed.get_string();
485: if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
1.161 paf 486: if(need_delim) // need delim & iteration produced string?
1.150 paf 487: r.write_pass_lang(r.process(*delim_maybe_code));
1.7 paf 488: need_delim=true;
489: }
1.161 paf 490: r.write_pass_lang(sv_processed);
1.7 paf 491: }
1.99 parser 492: table.set_current(saved_current);
1.7 paf 493: }
494:
1.110 parser 495: #ifndef DOXYGEN
1.174 paf 496: enum Table2hash_distint { D_ILLEGAL, D_FIRST, D_TABLES };
1.74 paf 497: struct Row_info {
1.166 paf 498: Request *r;
1.74 paf 499: Table *table;
1.182 paf 500: Value* key_code;
501: size_t key_field;
502: Array<int>* value_fields;
503: HashStringValue* hash;
1.174 paf 504: Table2hash_distint distinct;
1.182 paf 505: size_t row;
1.74 paf 506: };
1.110 parser 507: #endif
1.182 paf 508: static void table_row_to_hash(Table::element_type row, Row_info *info) {
509: const String* key;
510: if(info->key_code) {
511: info->table->set_current(info->row++); // change context row
512: StringOrValue sv_processed=info->r->process(*info->key_code);
1.166 paf 513: key=&sv_processed.as_string();
514: } else
1.182 paf 515: key=info->key_field<row->count()?row->get(info->key_field):0;
1.166 paf 516:
517: if(!key)
518: return; // ignore rows without key [too-short-record_array if-indexed]
1.74 paf 519:
1.182 paf 520: switch(info->distinct) {
1.174 paf 521: case D_ILLEGAL: case D_FIRST:
522: {
1.182 paf 523: VHash* vhash=new VHash;
524: HashStringValue& hash=vhash->hash();
525: for(Array_iterator<int> i(*info->value_fields); i.has_next(); ) {
526: size_t value_field=i.next();
527: if(value_field<row->count())
1.174 paf 528: hash.put(
1.182 paf 529: *info->table->columns()->get(value_field),
530: new VString(*row->get(value_field)));
1.174 paf 531: }
532:
1.182 paf 533: if(info->hash->put_dont_replace(*key, vhash)) // put. existed?
534: if(info->distinct==D_ILLEGAL)
1.174 paf 535: throw Exception("parser.runtime",
536: key,
537: "duplicate key");
538: }
539: break;
540: case D_TABLES:
541: {
1.182 paf 542: VTable* vtable=(VTable*)info->hash->get(*key); // put. table existed?
1.174 paf 543: Table* table;
544: if(vtable)
545: table=vtable->get_table();
546: else {
547: // no? creating table of same structure as source
1.179 paf 548: Table::Action_options table_options(0, 0);
1.182 paf 549: table=new Table(*info->table, table_options/*no rows, just structure*/);
550: info->hash->put(*key, new VTable(table));
1.174 paf 551: }
1.182 paf 552: *table+=row;
1.174 paf 553: }
554: break;
555: default:
556: throw Exception(0,
557: 0,
1.182 paf 558: "invalid distinct code (#%d)", info->distinct);
1.74 paf 559: }
560: }
1.182 paf 561: static void _hash(Request& r, MethodParams& params) {
562: Table& self_table=GET_SELF(r, VTable).table();
563: VHash& result=*new VHash;
564: if(Table::columns_type columns=self_table.columns())
565: if(columns->count()>0) {
1.174 paf 566: Table2hash_distint distinct=D_ILLEGAL;
1.182 paf 567: int param_index=params.count()-1;
1.166 paf 568: if(param_index>0) {
1.182 paf 569: if(HashStringValue* options=
570: params.as_no_junction(param_index, "param must not be code").get_hash()) {
1.166 paf 571: --param_index;
572: int valid_options=0;
1.182 paf 573: if(Value* vdistinct_code=options->get(sql_distinct_name)) {
1.166 paf 574: valid_options++;
1.174 paf 575: Value& vdistinct_value=r.process_to_value(*vdistinct_code);
576: if(vdistinct_value.is_string()) {
577: const String& sdistinct=*vdistinct_value.get_string();
578: if(sdistinct=="tables")
579: distinct=D_TABLES;
580: else
581: throw Exception("parser.runtime",
582: &sdistinct,
583: "must be 'tables' or true/false");
584: } else
585: distinct=vdistinct_value.as_bool()?D_FIRST:D_ILLEGAL;
1.166 paf 586: }
1.182 paf 587: if(valid_options!=options->count())
1.166 paf 588: throw Exception("parser.runtime",
1.182 paf 589: 0,
1.166 paf 590: "called with invalid option");
1.163 paf 591: }
592: }
593: if(param_index==2) // bad options param type
594: throw Exception("parser.runtime",
1.182 paf 595: 0,
1.163 paf 596: "options must be hash");
597:
1.182 paf 598: Array<int> value_fields;
1.163 paf 599: if(param_index>0) {
1.174 paf 600: if(distinct!=D_ILLEGAL && distinct!=D_FIRST)
601: throw Exception("parser.runtime",
602: 0,
603: "in distinct[tables] mode you may not specify value field(s)");
1.182 paf 604: Value& value_fields_param=params.as_no_junction(param_index, "value field(s) must not be code");
1.123 parser 605: if(value_fields_param.is_string()) {
1.182 paf 606: value_fields+=self_table.column_name2index(
607: *value_fields_param.get_string(), true);
608: } else if(Table* value_fields_table=value_fields_param.get_table()) {
609: for(Array_iterator<Table::element_type> i(*value_fields_table);
610: i.has_next(); ) {
611: const String& value_field_name
612: =*i.next()->get(0);
613: value_fields
614: +=self_table.column_name2index(value_field_name, true);
1.123 parser 615: }
616: } else
1.146 paf 617: throw Exception("parser.runtime",
1.182 paf 618: 0,
1.123 parser 619: "value field(s) must be string or self_table"
620: );
621: } else { // by all columns, including key
1.174 paf 622: if(!(distinct!=D_ILLEGAL && distinct!=D_FIRST))
1.182 paf 623: for(size_t i=0; i<columns->count(); i++)
1.174 paf 624: value_fields+=i;
1.74 paf 625: }
626:
1.182 paf 627:
628: {
629: Row_info info={0};
630: info.r=&r;
631: info.table=&self_table;
632: Value* key_param=¶ms[0];
633: info.key_code=key_param->get_junction()?key_param:0;
634: info.key_field=info.key_code?-1
635: :self_table.column_name2index(key_param->as_string(), true);
636: info.value_fields=&value_fields;
637: info.hash=&result.hash();
638: info.distinct=distinct;
639: info.row=0;
640:
641: int saved_current=self_table.current();
642: self_table.for_each(table_row_to_hash, &info);
643: self_table.set_current(saved_current);
644: }
1.74 paf 645: }
1.97 parser 646: r.write_no_lang(result);
1.74 paf 647: }
648:
1.110 parser 649: #ifndef DOXYGEN
1.78 paf 650: struct Table_seq_item {
1.182 paf 651: ArrayString* row;
1.34 paf 652: union {
1.182 paf 653: const char *c_str;
1.34 paf 654: double d;
655: } value;
1.32 paf 656: };
1.110 parser 657: #endif
1.34 paf 658: static int sort_cmp_string(const void *a, const void *b) {
659: return strcmp(
1.78 paf 660: static_cast<const Table_seq_item *>(a)->value.c_str,
661: static_cast<const Table_seq_item *>(b)->value.c_str
1.34 paf 662: );
663: }
664: static int sort_cmp_double(const void *a, const void *b) {
1.78 paf 665: double va=static_cast<const Table_seq_item *>(a)->value.d;
666: double vb=static_cast<const Table_seq_item *>(b)->value.d;
1.34 paf 667: if(va<vb)
668: return -1;
669: else if(va>vb)
670: return +1;
671: else
672: return 0;
673: }
1.182 paf 674: static void _sort(Request& r, MethodParams& params) {
675: Value& key_maker=params.as_junction(0, "key-maker must be code");
1.61 paf 676:
1.182 paf 677: bool reverse=params.count()>1/*..[desc|asc|]*/?
678: reverse=params.as_no_junction(1, "order must not be code").as_string()=="desc":
1.104 parser 679: false; // default=asc
1.32 paf 680:
1.182 paf 681: Table& old_table=GET_SELF(r, VTable).table();
682: Table& new_table=*new Table(old_table.columns());
1.34 paf 683:
1.182 paf 684: Table_seq_item* seq=new(PointerFreeGC) Table_seq_item[old_table.count()];
1.34 paf 685: int i;
686:
687: // calculate key values
688: bool key_values_are_strings=true;
1.182 paf 689: int old_count=old_table.count();
690: for(i=0; i<old_count; i++) {
1.101 parser 691: old_table.set_current(i);
1.32 paf 692: // calculate key value
1.182 paf 693: seq[i].row=old_table[i];
694: Value& value=r.process_to_value(key_maker).as_expr_result(true/*return string as-is*/);
1.34 paf 695: if(i==0) // determining key values type by first one
696: key_values_are_strings=value.is_string();
697:
698: if(key_values_are_strings)
699: seq[i].value.c_str=value.as_string().cstr();
700: else
701: seq[i].value.d=value.as_double();
1.32 paf 702: }
703: // sort keys
1.182 paf 704: _qsort(seq, old_count, sizeof(Table_seq_item),
1.34 paf 705: key_values_are_strings?sort_cmp_string:sort_cmp_double);
1.32 paf 706:
1.34 paf 707: // reorder table as they require in 'seq'
1.182 paf 708: for(i=0; i<old_count; i++)
709: new_table+=Table::element_type(seq[reverse?old_count-1-i:i].row);
710:
711: delete[] seq;
1.32 paf 712:
1.116 parser 713: // replace any previous table value
1.182 paf 714: GET_SELF(r, VTable).set_table(new_table);
1.32 paf 715: }
716:
1.176 paf 717: #ifndef DOXYGEN
1.182 paf 718: struct Expression_is_true_info {
1.176 paf 719: Request* r;
720: Value* expression_code;
721: };
722: #endif
1.182 paf 723: static bool expression_is_true(Table& self, void* ainfo) {
724: Expression_is_true_info& info=*static_cast<Expression_is_true_info*>(ainfo);
1.176 paf 725: return info.r->process_to_value(*info.expression_code).as_bool();
726: }
727: static bool _locate_expression(Table& table, Table::Action_options o,
1.182 paf 728: Request& r, MethodParams& params) {
729: check_option_param(o.defined, params, 1,
1.176 paf 730: "locate by expression only has parameters: expression and, maybe, options");
1.182 paf 731: Value& expression_code=params.as_junction(0, "must be expression");
1.145 paf 732:
1.182 paf 733: Expression_is_true_info info={&r, &expression_code};
734: return table.table_first_that(expression_is_true, &info, o);
1.145 paf 735: }
1.176 paf 736: static bool _locate_name_value(Table& table, Table::Action_options o,
1.182 paf 737: Request& r, MethodParams& params) {
738: check_option_param(o.defined, params, 2,
1.176 paf 739: "locate by locate by name has parameters: name, value and, maybe, options");
1.182 paf 740: const String& name=params.as_string(0, "column name must be string");
741: const String& value=params.as_string(1, "value must be string");
742: return table.locate(name, value, o);
743: }
744: static void _locate(Request& r, MethodParams& params) {
745: Table& table=GET_SELF(r, VTable).table();
1.72 paf 746:
1.182 paf 747: Table::Action_options o=get_action_options(r, params, table);
748:
749: bool result=params[0].get_junction()?
750: _locate_expression(table, o, r, params) :
751: _locate_name_value(table, o, r, params);
752: r.write_no_lang(*new VBool(result));
1.145 paf 753: }
1.182 paf 754:
755:
756: static void _flip(Request& r, MethodParams& params) {
757: Table& old_table=GET_SELF(r, VTable).table();
1.184 paf 758: Table& new_table=*new Table(0);
1.182 paf 759: if(size_t old_count=old_table.count())
760: if(size_t old_cols=old_table[0]->count())
761: for(size_t column=0; column<old_cols; column++) {
762: Table::element_type new_row(new ArrayString(old_count));
763: for(size_t i=0; i<old_count; i++) {
764: Table::element_type old_row=old_table[i];
765: *new_row+=column<old_row->count()?old_row->get(column):new String;
1.39 paf 766: }
1.182 paf 767: new_table+=new_row;
1.39 paf 768: }
769:
1.182 paf 770: r.write_no_lang(*new VTable(&new_table));
1.39 paf 771: }
772:
1.182 paf 773: static void _append(Request& r, MethodParams& params) {
1.134 paf 774: // data
1.182 paf 775: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
776: const String& string=r.process_to_string(params.as_junction(0, "body must be code"));
1.41 paf 777:
778: // parse cells
1.182 paf 779: Table::element_type row=new ArrayString;
780: size_t pos_after=0;
781: string.split(*row, pos_after, "\t", String::L_AS_IS);
1.41 paf 782:
1.182 paf 783: GET_SELF(r, VTable).table()+=row;
1.41 paf 784: }
785:
1.182 paf 786: static void join_named_row(Table& src, Table* dest) {
787: Table::columns_type dest_columns=dest->columns();
788: size_t dest_columns_count=dest_columns->count();
789: Table::element_type dest_row(new ArrayString(dest_columns_count));
790: for(size_t dest_column=0; dest_column<dest_columns_count; dest_column++) {
791: const String* src_item=src.item(*dest_columns->get(dest_column));
792: *dest_row+=src_item?src_item:new String;
793: }
794: *dest+=dest_row;
795: }
796: static void join_nameless_row(Table& src, Table* dest) {
797: *dest+=src[src.current()];
798: }
799: static void _join(Request& r, MethodParams& params) {
800: Table* maybe_src=params.as_no_junction(0, "table ref must not be code").get_table();
1.42 paf 801: if(!maybe_src)
1.146 paf 802: throw Exception("parser.runtime",
1.182 paf 803: 0,
1.42 paf 804: "source is not a table");
1.176 paf 805: Table& src=*maybe_src;
806:
1.182 paf 807: Table::Action_options o=get_action_options(r, params, src);
808: check_option_param(o.defined, params, 1,
1.176 paf 809: "invalid extra parameter");
1.42 paf 810:
1.182 paf 811: Table& dest=GET_SELF(r, VTable).table();
1.42 paf 812: if(&src == &dest)
1.146 paf 813: throw Exception("parser.runtime",
1.182 paf 814: 0,
1.42 paf 815: "source and destination are same table");
816:
1.182 paf 817: if(Table::columns_type dest_columns=dest.columns()) // dest is named
818: src.table_for_each(join_named_row, &dest, o);
819: else // dest is nameless
820: src.table_for_each(join_nameless_row, &dest, o);
1.42 paf 821: }
822:
1.94 parser 823: #ifndef DOXYGEN
1.169 paf 824: class Table_sql_event_handlers: public SQL_Driver_query_event_handlers {
1.182 paf 825: ArrayString& columns;
826: ArrayString* row;
1.94 parser 827: public:
1.182 paf 828: Table* table;
829: public:
830: Table_sql_event_handlers() :
831: columns(*new ArrayString), row(0), table(0) {
1.94 parser 832: }
833:
1.182 paf 834: bool add_column(SQL_Error& error, const char *str, size_t length) {
1.170 paf 835: try {
1.182 paf 836: columns+=new String(str, length, true);
1.170 paf 837: return false;
838: } catch(...) {
839: error=SQL_Error("exception occured in Table_sql_event_handlers::add_column");
840: return true;
841: }
842: }
843: bool before_rows(SQL_Error& error) {
844: try {
1.182 paf 845: table=new Table(&columns);
1.170 paf 846: return false;
847: } catch(...) {
848: error=SQL_Error("exception occured in Table_sql_event_handlers::before_rows");
849: return true;
850: }
851: }
852: bool add_row(SQL_Error& error) {
853: try {
1.182 paf 854: *table+=row=new ArrayString;
1.170 paf 855: return false;
856: } catch(...) {
857: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row");
858: return true;
859: }
860: }
1.182 paf 861: bool add_row_cell(SQL_Error& error, const char* str, size_t length) {
1.170 paf 862: try {
1.182 paf 863: String& cell=*new String;
864: if(length)
865: cell.append_know_length(str, length, String::L_TAINTED);
866: *row+=&cell;
1.170 paf 867: return false;
868: } catch(...) {
869: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row_cell");
870: return true;
871: }
1.94 parser 872: }
873: };
874: #endif
1.182 paf 875: static void _sql(Request& r, MethodParams& params) {
876: Value& statement=params.as_junction(0, "statement must be code");
1.49 paf 877:
1.53 paf 878: ulong limit=0;
1.100 parser 879: ulong offset=0;
1.182 paf 880: if(params.count()>1) {
881: Value& voptions=params.as_no_junction(1, "options must be hash, not code");
1.156 paf 882: if(!voptions.is_string())
1.182 paf 883: if(HashStringValue* options=voptions.get_hash()) {
1.164 paf 884: int valid_options=0;
1.182 paf 885: if(Value* vlimit=options->get(sql_limit_name)) {
1.164 paf 886: valid_options++;
1.147 paf 887: limit=(ulong)r.process_to_value(*vlimit).as_double();
1.164 paf 888: }
1.182 paf 889: if(Value* voffset=options->get(sql_offset_name)) {
1.164 paf 890: valid_options++;
1.147 paf 891: offset=(ulong)r.process_to_value(*voffset).as_double();
1.164 paf 892: }
1.182 paf 893: if(valid_options!=options->count())
1.164 paf 894: throw Exception("parser.runtime",
1.182 paf 895: 0,
1.164 paf 896: "called with invalid option");
1.109 parser 897: } else
1.146 paf 898: throw Exception("parser.runtime",
1.182 paf 899: 0,
1.109 parser 900: "options must be hash");
1.49 paf 901: }
902:
1.182 paf 903: Temp_lang temp_lang(r, String::L_SQL);
904: const String& statement_string=r.process_to_string(statement);
905: const char* statement_cstr=
906: statement_string.cstr(String::L_UNSPECIFIED, r.connection());
907: Table_sql_event_handlers handlers;
1.135 paf 908: #ifdef RESOURCES_DEBUG
909: struct timeval mt[2];
910: //measure:before
911: gettimeofday(&mt[0],NULL);
912: #endif
1.182 paf 913: r.connection()->query(
1.160 paf 914: statement_cstr, offset, limit,
915: handlers,
916: statement_string);
1.135 paf 917:
918: #ifdef RESOURCES_DEBUG
919: //measure:after connect
920: gettimeofday(&mt[1],NULL);
921:
922: double t[2];
923: for(int i=0;i<2;i++)
924: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
925:
926: r.sql_request_time+=t[1]-t[0];
927: #endif
1.96 parser 928:
1.182 paf 929: Table& result=
930: handlers.table?*handlers.table: // query resulted in table? return it
931: *new Table(Table::columns_type(0)); // query returned no table, fake it
1.49 paf 932:
933: // replace any previous table value
1.182 paf 934: GET_SELF(r, VTable).set_table(result);
1.49 paf 935: }
936:
1.182 paf 937: static void _columns(Request& r, MethodParams&) {
1.88 parser 938:
1.182 paf 939: Table::columns_type result_columns(new ArrayString);
940: *result_columns+=new String("column");
941: Table& result_table=*new Table(result_columns);
1.88 parser 942:
1.182 paf 943: Table& source_table=GET_SELF(r, VTable).table();
944: if(Table::columns_type source_columns=source_table.columns()) {
945: for(Array_iterator<const String*> i(*source_columns); i.has_next(); ) {
946: Table::element_type result_row(new ArrayString);
947: *result_row+=i.next();
948: result_table+=result_row;
1.88 parser 949: }
950: }
951:
1.182 paf 952: r.write_no_lang(*new VTable(&result_table));
1.88 parser 953: }
954:
1.182 paf 955: static void _select(Request& r, MethodParams& params) {
956: Value& vcondition=params.as_junction(0, "condition must be expression");
1.148 paf 957:
1.182 paf 958: Table& source_table=GET_SELF(r, VTable).table();
959: Table& result_table=*new Table(source_table.columns());
1.148 paf 960:
961: int saved_current=source_table.current();
1.182 paf 962: int size=source_table.count();
1.148 paf 963: for(int row=0; row<size; row++) {
964: source_table.set_current(row);
965:
1.150 paf 966: bool condition=r.process_to_value(vcondition,
1.149 paf 967: /*0/*no name* /,*/
1.148 paf 968: false/*don't intercept string*/).as_bool();
969:
970: if(condition) // ...condition is true=
1.182 paf 971: result_table+=source_table[row]; // =green light to go to result
1.148 paf 972: }
973: source_table.set_current(saved_current);
974:
1.182 paf 975: r.write_no_lang(*new VTable(&result_table));
1.148 paf 976: }
977:
1.66 paf 978: // constructor
979:
1.182 paf 980: MTable::MTable(): Methoded("table") {
1.142 paf 981: // ^table::create{data}
982: // ^table::create[nameless]{data}
983: // ^table::create[table]
984: add_native_method("create", Method::CT_DYNAMIC, _create, 1, 2);
985: // old name for compatibility with <= v 1.141 2002/01/25 11:33:45 paf
986: add_native_method("set", Method::CT_DYNAMIC, _create, 1, 2);
1.2 paf 987:
1.142 paf 988: // ^table::load[file]
989: // ^table::load[nameless;file]
1.168 paf 990: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 3);
1.22 paf 991:
992: // ^table.save[file]
993: // ^table.save[nameless;file]
1.66 paf 994: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 2);
1.6 paf 995:
996: // ^table.count[]
1.66 paf 997: add_native_method("count", Method::CT_DYNAMIC, _count, 0, 0);
1.6 paf 998:
999: // ^table.line[]
1.66 paf 1000: add_native_method("line", Method::CT_DYNAMIC, _line, 0, 0);
1.6 paf 1001:
1.10 paf 1002: // ^table.offset[]
1.133 paf 1003: // ^table.offset(offset)
1004: // ^table.offset[cur|set](offset)
1005: add_native_method("offset", Method::CT_DYNAMIC, _offset, 0, 2);
1.7 paf 1006:
1.10 paf 1007: // ^table.menu{code}
1008: // ^table.menu{code}[delim]
1.66 paf 1009: add_native_method("menu", Method::CT_DYNAMIC, _menu, 1, 2);
1.74 paf 1010:
1.79 paf 1011: // ^table:hash[key field name]
1.123 parser 1012: // ^table:hash[key field name][value field name(s) string/table]
1.163 paf 1013: add_native_method("hash", Method::CT_DYNAMIC, _hash, 1, 3);
1.32 paf 1014:
1.102 parser 1015: // ^table.sort{string-key-maker} ^table.sort{string-key-maker}[desc|asc]
1016: // ^table.sort(numeric-key-maker) ^table.sort(numeric-key-maker)[desc|asc]
1.66 paf 1017: add_native_method("sort", Method::CT_DYNAMIC, _sort, 1, 2);
1.8 paf 1018:
1.36 paf 1019: // ^table.locate[field;value]
1.176 paf 1020: add_native_method("locate", Method::CT_DYNAMIC, _locate, 1, 3);
1.39 paf 1021:
1022: // ^table.flip[]
1.66 paf 1023: add_native_method("flip", Method::CT_DYNAMIC, _flip, 0, 0);
1.41 paf 1024:
1025: // ^table.append{r{tab}e{tab}c{tab}o{tab}r{tab}d}
1.66 paf 1026: add_native_method("append", Method::CT_DYNAMIC, _append, 1, 1);
1.42 paf 1027:
1.157 paf 1028: // ^table.join[table][$.limit(10) $.offset(1) $.offset[cur] ]
1029: add_native_method("join", Method::CT_DYNAMIC, _join, 1, 2);
1.49 paf 1030:
1031:
1.100 parser 1032: // ^table:sql[query]
1033: // ^table:sql[query][$.limit(1) $.offset(2)]
1034: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.88 parser 1035:
1036: // ^table:columns[]
1037: add_native_method("columns", Method::CT_DYNAMIC, _columns, 0, 0);
1.148 paf 1038:
1039: // ^table.select(expression) = table
1040: add_native_method("select", Method::CT_DYNAMIC, _select, 1, 1);
1.40 paf 1041: }
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