Annotation of parser3/src/classes/table.C, revision 1.302
1.20 paf 1: /** @file
1.47 paf 2: Parser: @b table parser class.
1.20 paf 3:
1.286 moko 4: Copyright (c) 2001-2012 Art. Lebedev Studio (http://www.artlebedev.com)
1.144 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.154 paf 6: */
1.221 paf 7:
1.257 misha 8: #if (!defined(NO_STRINGSTREAM) && !defined(FREEBSD4))
1.229 misha 9: #include <sstream>
1.240 misha 10: #endif
1.1 paf 11:
1.105 parser 12: #include "classes.h"
1.182 paf 13: #include "pa_vmethod_frame.h"
14:
1.16 paf 15: #include "pa_common.h"
1.1 paf 16: #include "pa_request.h"
1.265 misha 17: #include "pa_charsets.h"
1.1 paf 18: #include "pa_vtable.h"
1.6 paf 19: #include "pa_vint.h"
1.51 paf 20: #include "pa_sql_connection.h"
1.72 paf 21: #include "pa_vbool.h"
1.277 moko 22: #include "pa_array.h"
1.1 paf 23:
1.302 ! moko 24: volatile const char * IDENT_TABLE_C="$Id: table.C,v 1.301 2014/06/29 06:30:25 misha Exp $";
1.286 moko 25:
1.66 paf 26: // class
27:
1.182 paf 28: class MTable: public Methoded {
1.66 paf 29: public: // VStateless_class
1.264 misha 30: Value* create_new_value(Pool&) { return new VTable(); }
1.66 paf 31: public:
1.182 paf 32: MTable();
1.66 paf 33: };
1.1 paf 34:
1.182 paf 35: // global variable
36:
37: DECLARE_CLASS_VAR(table, new MTable, 0);
38:
39: #define TABLE_REVERSE_NAME "reverse"
40:
41: // globals
42:
1.203 paf 43: String sql_bind_name(SQL_BIND_NAME);
1.214 paf 44: String sql_limit_name(PA_SQL_LIMIT_NAME);
45: String sql_offset_name(PA_SQL_OFFSET_NAME);
1.182 paf 46: String sql_default_name(SQL_DEFAULT_NAME);
47: String sql_distinct_name(SQL_DISTINCT_NAME);
1.227 misha 48: String sql_value_type_name(SQL_VALUE_TYPE_NAME);
1.182 paf 49: String table_reverse_name(TABLE_REVERSE_NAME);
50:
1.1 paf 51: // methods
1.66 paf 52:
1.182 paf 53: static Table::Action_options get_action_options(Request& r, MethodParams& params,
1.268 misha 54: size_t options_index, const Table& source) {
1.176 paf 55: Table::Action_options result;
1.268 misha 56: if(params.count() <= options_index)
1.182 paf 57: return result;
58:
1.288 misha 59: HashStringValue* options=params.as_hash(options_index);
1.176 paf 60: if(!options)
61: return result;
62:
63: result.defined=true;
64: bool defined_offset=false;
65:
66: int valid_options=0;
1.182 paf 67: if(Value* voffset=options->get(sql_offset_name)) {
1.176 paf 68: valid_options++;
69: defined_offset=true;
70: if(voffset->is_string()) {
1.182 paf 71: const String& soffset=*voffset->get_string();
1.176 paf 72: if(soffset == "cur")
73: result.offset=source.current();
74: else
1.226 misha 75: throw Exception(PARSER_RUNTIME,
1.176 paf 76: &soffset,
77: "must be 'cur' string or expression");
78: } else
79: result.offset=r.process_to_value(*voffset).as_int();
80: }
1.182 paf 81: if(Value* vlimit=options->get(sql_limit_name)) {
1.176 paf 82: valid_options++;
83: result.limit=r.process_to_value(*vlimit).as_int();
84: }
1.182 paf 85: if(Value *vreverse=(Value *)options->get(table_reverse_name)) {
86: valid_options++;
87: result.reverse=r.process_to_value(*vreverse).as_bool();
88: if(result.reverse && !defined_offset)
89: result.offset=source.count()-1;
90: }
91:
92: if(valid_options!=options->count())
1.272 misha 93: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.176 paf 94:
95: return result;
96: }
1.180 paf 97: static void check_option_param(bool options_defined,
1.182 paf 98: MethodParams& params, size_t next_param_index,
1.176 paf 99: const char *msg) {
1.182 paf 100: if(next_param_index+(options_defined?1:0) != params.count())
1.226 misha 101: throw Exception(PARSER_RUNTIME,
1.182 paf 102: 0,
1.176 paf 103: "%s", msg);
1.157 paf 104: }
105:
1.236 misha 106: struct TableSeparators {
107: char column; const String* scolumn;
108: char encloser; const String* sencloser;
109:
110: TableSeparators():
1.254 misha 111: column('\t'), scolumn(new String("\t")),
1.236 misha 112: encloser(0), sencloser(0)
113: {}
114: int load( HashStringValue& options ) {
115: int result=0;
116: if(Value* vseparator=options.get(PA_COLUMN_SEPARATOR_NAME)) {
117: scolumn=&vseparator->as_string();
118: if(scolumn->length()!=1)
119: throw Exception(PARSER_RUNTIME,
120: scolumn,
121: "separator must be one character long");
122: column=scolumn->first_char();
123: result++;
124: }
125: if(Value* vencloser=options.get(PA_COLUMN_ENCLOSER_NAME)) {
126: sencloser=&vencloser->as_string();
1.297 moko 127: if(sencloser->is_empty()){
128: encloser=0;
129: } else {
1.236 misha 130: if(sencloser->length()!=1)
131: throw Exception(PARSER_RUNTIME,
132: sencloser,
133: "encloser must be one character long");
134: encloser=sencloser->first_char();
1.297 moko 135: }
1.236 misha 136: result++;
137: }
138: return result;
139: }
140: };
141:
1.182 paf 142: static void _create(Request& r, MethodParams& params) {
1.157 paf 143: // clone/copy part?
1.182 paf 144: if(Table *source=params[0].get_table()) {
1.268 misha 145: Table::Action_options o=get_action_options(r, params, 1, *source);
1.182 paf 146: check_option_param(o.defined, params, 1,
1.176 paf 147: "too many parameters");
1.182 paf 148: GET_SELF(r, VTable).set_table(*new Table(*source, o));
1.157 paf 149: return;
150: }
1.142 paf 151:
1.236 misha 152: size_t data_param_index=0;
153: bool nameless=false;
154:
155: if(params.count()>1) {
156: if(params[0].is_string()){ // can be nameless only
157: const String& snameless=params.as_string(0, "called with more then 1 param, first param may be only string 'nameless' or junction");
158: if(snameless!="nameless")
159: throw Exception(PARSER_RUNTIME,
160: &snameless,
161: "table::create called with more then 1 param, first param may be only 'nameless'");
162: nameless=true;
163: data_param_index++;
164: }
165: }
166:
167: HashStringValue *options=0;
168: TableSeparators separators;
169:
170: size_t options_param_index=data_param_index+1;
171: if(
172: options_param_index<params.count()
1.288 misha 173: && (options=params.as_hash(options_param_index))
1.236 misha 174: ) {
175: // cloning, so that we could change
176: options=new HashStringValue(*options);
177: separators.load(*options);
178: if(separators.encloser){
179: throw Exception(PARSER_RUNTIME,
180: 0,
181: "encloser not supported for table::create yet");
182: }
183: }
184:
185: // data
1.182 paf 186: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
187: const String& data=
1.301 misha 188: r.process_to_string(params.as_junction(data_param_index, "body must be table or code"));
1.44 paf 189:
190: // parse columns
1.182 paf 191: size_t raw_pos_after=0;
192: Table::columns_type columns;
1.236 misha 193:
194: if(nameless){
1.182 paf 195: columns=Table::columns_type(0); // nameless
1.21 paf 196: } else {
1.182 paf 197: columns=Table::columns_type(new ArrayString);
1.44 paf 198:
1.182 paf 199: ArrayString head;
200: data.split(head, raw_pos_after, "\n", String::L_AS_IS, 1);
201: if(head.count()) {
202: size_t col_pos_after=0;
1.285 misha 203: if(head[0]->is_empty())
204: *columns += new String();
205: else
206: head[0]->split(*columns, col_pos_after, *separators.scolumn, String::L_AS_IS);
1.182 paf 207: }
1.44 paf 208: }
209:
1.182 paf 210: Table& table=*new Table(columns);
1.44 paf 211: // parse cells
1.182 paf 212:
213: ArrayString rows;
214: data.split(rows, raw_pos_after, "\n", String::L_AS_IS);
215: Array_iterator<const String*> i(rows);
1.98 parser 216: while(i.has_next()) {
1.182 paf 217: Table::element_type row(new ArrayString);
1.252 misha 218: const String& string=*i.next();
1.118 parser 219: // remove comment lines
1.252 misha 220: if(string.is_empty())
1.44 paf 221: continue;
222:
1.182 paf 223: size_t col_pos_after=0;
1.236 misha 224: string.split(*row, col_pos_after, *separators.scolumn, String::L_AS_IS);
1.182 paf 225: table+=row;
1.17 paf 226: }
1.1 paf 227:
1.44 paf 228: // replace any previous table value
1.182 paf 229: GET_SELF(r, VTable).set_table(table);
1.44 paf 230: }
231:
1.187 paf 232: struct lsplit_result {
233: char* piece;
234: char delim;
235:
236: operator bool() { return piece!=0; }
237: };
238:
239: inline lsplit_result lsplit(char* string, char delim1, char delim2) {
240: lsplit_result result;
1.273 misha 241: if(string) {
1.187 paf 242: char delims[]={delim1, delim2, 0};
243: if(char* v=strpbrk(string, delims)) {
244: result.delim=*v;
245: *v=0;
246: result.piece=v+1;
247: return result;
248: }
1.273 misha 249: }
1.187 paf 250: result.piece=0;
251: result.delim=0;
1.273 misha 252: return result;
1.187 paf 253: }
254:
255: inline lsplit_result lsplit(char* *string_ref, char delim1, char delim2) {
1.273 misha 256: lsplit_result result;
1.187 paf 257: result.piece=*string_ref;
258: lsplit_result next=lsplit(*string_ref, delim1, delim2);
259: result.delim=next.delim;
260: *string_ref=next.piece;
1.273 misha 261: return result;
1.187 paf 262: }
263:
264: static lsplit_result lsplit(char** string_ref, char delim1, char delim2, char encloser) {
265: lsplit_result result;
266:
1.273 misha 267: if(char* string=*string_ref) {
1.187 paf 268: if(encloser && *string==encloser) {
1.273 misha 269: string++;
1.187 paf 270:
271: char *read;
272: char *write;
273: write=read=string;
274: char c;
1.290 moko 275: // we are enclosed, searching for second encloser
276: while(c=*read++) {
1.187 paf 277: if(c==encloser) {
1.290 moko 278: if(*read==encloser) // double-encloser stands for encloser
1.187 paf 279: read++;
1.290 moko 280: else
281: break; // note: skipping encloser
1.187 paf 282: }
283: *write++=c;
284: }
1.290 moko 285: // we are no longer enclosed, searching for delimiter, skipping extra enclosers
286: while(c=*read++) {
287: if(c==delim1 || c==delim2) {
288: result.delim=c;
289: break;
290: } else if(c!=encloser)
291: *write++=c;
292: }
1.187 paf 293: *write=0; // terminate
294: *string_ref=c? read: 0;
295: result.piece=string;
296: return result;
297: } else
298: return lsplit(string_ref, delim1, delim2);
1.273 misha 299: }
1.187 paf 300: result.piece=0;
1.273 misha 301: return result;
1.187 paf 302: }
303:
304: static void skip_empty_and_comment_lines( char** data_ref ) {
305: if(char *data=*data_ref) {
306: while( char c=*data ) {
307: if( c== '\n' || c == '#' ) {
308: /*nowhere=*/getrow(&data); // remove empty&comment lines
1.199 paf 309: if(!(*data_ref=data))
310: break;
1.187 paf 311: continue;
312: }
313: break;
314: }
315: }
316: }
317:
1.273 misha 318: static void skip_empty_lines( char** data_ref ) {
319: if(char *data=*data_ref) {
320: while( char c=*data ) {
321: if( c== '\n' ) {
322: /*nowhere=*/getrow(&data); // remove empty lines
323: if(!(*data_ref=data))
324: break;
325: continue;
326: }
327: break;
328: }
329: }
330: }
331:
332: typedef void (*Skip_lines_action)(char** data_ref);
333:
1.182 paf 334: static void _load(Request& r, MethodParams& params) {
1.232 misha 335: const String& first_param=params.as_string(0, FILE_NAME_MUST_BE_STRING);
1.168 paf 336: int filename_param_index=0;
337: bool nameless=first_param=="nameless";
338: if(nameless)
339: filename_param_index++;
1.182 paf 340: size_t options_param_index=filename_param_index+1;
1.186 paf 341:
342: HashStringValue *options=0;
1.187 paf 343: TableSeparators separators;
1.186 paf 344: if(options_param_index<params.count()
1.288 misha 345: && (options=params.as_hash(options_param_index))) {
1.186 paf 346: // cloning, so that we could change [to simplify checks on params inside file_read_text
347: options=new HashStringValue(*options);
1.187 paf 348: separators.load(*options);
1.186 paf 349: }
350:
1.44 paf 351: // loading text
1.247 misha 352: char *data=file_load_text(r,
1.232 misha 353: r.absolute(params.as_string(filename_param_index, FILE_NAME_MUST_BE_STRING)),
1.168 paf 354: true,
1.186 paf 355: options
1.168 paf 356: );
1.44 paf 357:
1.273 misha 358: Skip_lines_action skip_lines_action = (separators.column=='#' || separators.encloser=='#') ? skip_empty_lines : skip_empty_and_comment_lines;
359:
1.1 paf 360: // parse columns
1.182 paf 361: Table::columns_type columns;
1.168 paf 362: if(nameless) {
1.182 paf 363: columns=Table::columns_type(0); // nameless
1.1 paf 364: } else {
1.182 paf 365: columns=Table::columns_type(new ArrayString);
1.1 paf 366:
1.273 misha 367: skip_lines_action(&data);
1.187 paf 368: while( lsplit_result sr=lsplit(&data, separators.column, '\n', separators.encloser) ) {
1.256 misha 369: *columns+=new String(sr.piece, String::L_TAINTED);
1.187 paf 370: if(sr.delim=='\n')
371: break;
1.139 paf 372: }
1.1 paf 373: }
1.187 paf 374:
375: Table& table=*new Table(columns);
1.219 paf 376: int columns_count=columns? columns->count(): 0;
1.1 paf 377:
378: // parse cells
1.218 paf 379: Table::element_type row(new ArrayString(columns_count));
1.273 misha 380: skip_lines_action(&data);
1.187 paf 381: while( lsplit_result sr=lsplit(&data, separators.column, '\n', separators.encloser) ) {
1.201 paf 382: if(!*sr.piece && !sr.delim && !row->count()) // append last empty column [if without \n]
383: break;
1.256 misha 384: *row+=new String(sr.piece, String::L_TAINTED);
1.187 paf 385: if(sr.delim=='\n') {
386: table+=row;
1.218 paf 387: row=new ArrayString(columns_count);
1.273 misha 388: skip_lines_action(&data);
1.1 paf 389: }
1.187 paf 390: }
391: // last line [if without \n]
392: if(row->count())
1.1 paf 393: table+=row;
1.187 paf 394:
1.1 paf 395: // replace any previous table value
1.182 paf 396: GET_SELF(r, VTable).set_table(table);
1.1 paf 397: }
1.2 paf 398:
1.257 misha 399: #if (!defined(NO_STRINGSTREAM) && !defined(FREEBSD4))
1.297 moko 400: #define USE_STRINGSTREAM
401: #endif
1.241 misha 402:
1.297 moko 403: #ifdef USE_STRINGSTREAM
1.269 misha 404: #include "gc_allocator.h"
405:
406: typedef std::basic_stringstream<char, std::char_traits<char>, gc_allocator<char> > pa_stringstream;
407: typedef std::basic_string<char, std::char_traits<char>, gc_allocator<char> > pa_string;
408:
1.298 moko 409: static void enclose( pa_stringstream& to, const String* from, char encloser ) {
1.297 moko 410: if(from){
1.257 misha 411: to<<encloser;
1.188 paf 412: // while we have 'encloser'...
1.189 paf 413: size_t pos_after=0;
1.297 moko 414: for( size_t pos_before; (pos_before=from->pos( encloser, pos_after ))!=STRING_NOT_FOUND; pos_after=pos_before) {
1.220 paf 415: pos_before++; // including first encloser (and skipping it for next pos)
1.297 moko 416: to<<from->mid(pos_after, pos_before).cstr();
1.257 misha 417: to<<encloser; // doubling encloser
1.188 paf 418: }
419: // last piece
1.297 moko 420: size_t from_length=from->length();
1.188 paf 421: if(pos_after<from_length)
1.297 moko 422: to<<from->mid(pos_after, from_length).cstr();
423: to<<encloser;
424: } else {
425: to<<encloser<<encloser;
426: }
427: }
428:
429: static void table_to_csv(pa_stringstream& result, Table& table, TableSeparators& separators, bool output_column_names) {
430: if(output_column_names) {
431: if(table.columns()) { // named table
432: if(separators.encloser){
433: for(Array_iterator<const String*> i(*table.columns()); i.has_next(); ) {
1.298 moko 434: enclose( result, i.next(), separators.encloser );
1.297 moko 435: if(i.has_next())
436: result<<separators.column;
437: }
438: } else {
439: for(Array_iterator<const String*> i(*table.columns()); i.has_next(); ) {
440: result<<i.next()->cstr();
441: if(i.has_next())
442: result<<separators.column;
443: }
444: }
445: } else { // nameless table [we were asked to output column names]
446: if(int lsize=table.count()?table[0]->count():0)
447: for(int column=0; column<lsize; column++) {
448: if(separators.encloser) {
449: result<<separators.encloser<<column<<separators.encloser;
450: } else {
451: result<<column;
452: }
453: if(column<lsize-1){
454: result<<separators.column;
455: }
456: }
457: else
458: result<<"empty nameless table";
459: }
460: result<<'\n';
461: }
1.188 paf 462:
1.297 moko 463: // process data lines
464: Array_iterator<ArrayString*> i(table);
465: if(separators.encloser){
466: while(i.has_next()) {
467: for(Array_iterator<const String*> c(*i.next()); c.has_next(); ) {
1.298 moko 468: enclose( result, c.next(), separators.encloser );
1.297 moko 469: if(c.has_next())
470: result<<separators.column;
471: }
472: result<<'\n';
473: }
474: } else {
475: while(i.has_next()) {
476: for(Array_iterator<const String*> c(*i.next()); c.has_next(); ) {
477: result<<c.next()->cstr();
478: if(c.has_next())
479: result<<separators.column;
480: }
481: result<<'\n';
482: }
483: }
1.188 paf 484: }
485:
1.241 misha 486: #else
487:
1.298 moko 488: void enclose( String& to, const String* from, char encloser, const String* sencloser ) {
1.297 moko 489: if(from){
1.257 misha 490: to<<*sencloser;
1.224 misha 491: // while we have 'encloser'...
492: size_t pos_after=0;
1.297 moko 493: for( size_t pos_before; (pos_before=from->pos( encloser, pos_after ))!=STRING_NOT_FOUND; pos_after=pos_before) {
1.224 misha 494: pos_before++; // including first encloser (and skipping it for next pos)
1.297 moko 495: to<<from->mid(pos_after, pos_before);
1.257 misha 496: to<<*sencloser; // doubling encloser
1.224 misha 497: }
498: // last piece
1.297 moko 499: size_t from_length=from->length();
1.224 misha 500: if(pos_after<from_length)
1.297 moko 501: to<<from->mid(pos_after, from_length);
1.257 misha 502: to<<*sencloser;
1.297 moko 503: } else {
504: to<<*sencloser<<*sencloser;
505: }
1.224 misha 506: }
507:
1.297 moko 508: static void table_to_csv(String& result, Table& table, TableSeparators& separators, bool output_column_names) {
509: if(output_column_names) {
510: if(table.columns()) { // named table
511: if(separators.encloser) {
512: for(Array_iterator<const String*> i(*table.columns()); i.has_next(); ) {
1.298 moko 513: enclose( result, i.next(), separators.encloser, separators.sencloser );
1.297 moko 514: if(i.has_next())
515: result<<*separators.scolumn;
516: }
517: } else {
518: for(Array_iterator<const String*> i(*table.columns()); i.has_next(); ) {
519: result<<*i.next();
520: if(i.has_next())
521: result<<*separators.scolumn;
522: }
523: }
524: } else { // nameless table [we were asked to output column names]
525: if(int lsize=table.count()?table[0]->count():0)
526: for(int column=0; column<lsize; column++) {
1.298 moko 527: if(separators.encloser) {
528: result<<*separators.sencloser<<String::Body::Format(column)<<*separators.sencloser;
529: } else {
530: result<<String::Body::Format(column);
531: }
532: if(column<lsize-1){
533: result<<*separators.scolumn;
534: }
1.297 moko 535: }
536: else
537: result.append_help_length("empty nameless table", 0, String::L_CLEAN);
538: }
539: result.append_know_length("\n", 1, String::L_CLEAN);
540: }
541:
542: // data lines
543: Array_iterator<ArrayString*> i(table);
544: if(separators.encloser){
545: while(i.has_next()) {
546: for(Array_iterator<const String*> c(*i.next()); c.has_next(); ) {
1.298 moko 547: enclose( result, c.next(), separators.encloser, separators.sencloser );
1.297 moko 548: if(c.has_next())
549: result<<*separators.scolumn;
550: }
551: result.append_know_length("\n", 1, String::L_CLEAN);
552: }
553: } else {
554: while(i.has_next()) {
555: for(Array_iterator<const String*> c(*i.next()); c.has_next(); ) {
556: result<<*c.next();
557: if(c.has_next())
558: result<<*separators.scolumn;
559: }
560: result.append_know_length("\n", 1, String::L_CLEAN);
561: }
562: }
563: }
1.257 misha 564: #endif // don't use stringstream
1.241 misha 565:
1.297 moko 566:
1.241 misha 567: static void _save(Request& r, MethodParams& params) {
1.237 misha 568: const String& first_arg=params.as_string(0, FIRST_ARG_MUST_NOT_BE_CODE);
1.188 paf 569: size_t param_index=1;
570:
571: bool do_append=false;
572: bool output_column_names=true;
573:
574: // mode?
575: if(first_arg=="append")
576: do_append=true;
577: else if(first_arg=="nameless")
578: output_column_names=false;
579: else
580: --param_index;
581:
1.232 misha 582: const String& file_name=params.as_string(param_index++, FILE_NAME_MUST_NOT_BE_CODE);
1.246 misha 583: String file_spec=r.absolute(file_name);
584:
585: if(do_append && file_exist(file_spec))
586: output_column_names=false;
1.188 paf 587:
588: TableSeparators separators;
1.281 misha 589: if(param_index<params.count())
1.288 misha 590: if(HashStringValue* options=params.as_hash(param_index++)) {
1.281 misha 591: int valid_options=separators.load(*options);
592: if(valid_options!=options->count())
593: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.222 paf 594: }
1.281 misha 595:
1.188 paf 596: if(param_index<params.count())
1.226 misha 597: throw Exception(PARSER_RUNTIME,
1.188 paf 598: 0,
599: "bad mode (must be nameless or append)");
1.22 paf 600:
1.182 paf 601: Table& table=GET_SELF(r, VTable).table();
1.31 paf 602:
1.297 moko 603: #ifdef USE_STRINGSTREAM
1.269 misha 604: pa_stringstream ost(std::stringstream::out);
1.257 misha 605:
1.297 moko 606: table_to_csv(ost, table, separators, output_column_names);
1.31 paf 607:
608: // write
1.269 misha 609: pa_string data=ost.str();
1.257 misha 610: const char* data_cstr=data.c_str();
1.267 misha 611: file_write(r.charsets, file_spec, data_cstr, data.length(), true /* as text */, do_append);
1.241 misha 612: #else
1.257 misha 613: String sdata;
1.224 misha 614:
1.297 moko 615: table_to_csv(sdata, table, separators, output_column_names);
1.224 misha 616:
617: // write
1.257 misha 618: const char* data_cstr=sdata.cstr();
1.297 moko 619: file_write(r.charsets, file_spec, data_cstr, sdata.length(), true /* as text */, do_append);
1.257 misha 620: if(*data_cstr) // not empty (when empty it's not heap memory)
621: pa_free((void*)data_cstr); // not needed anymore
1.297 moko 622: #endif
623: }
624:
625: static void _csv_string(Request& r, MethodParams& params) {
626: bool output_column_names=true;
627: size_t param_index=0;
628: if(params.count()>0 && params[0].is_string()) {
629: if(params.as_string(0, FIRST_ARG_MUST_NOT_BE_CODE)=="nameless") {
630: output_column_names=false;
631: param_index++;
632: } else {
633: throw Exception(PARSER_RUNTIME,
634: 0,
635: "bad mode (must be nameless)");
636: }
1.224 misha 637: }
1.240 misha 638:
1.297 moko 639: TableSeparators separators;
640: if(param_index<params.count())
641: if(HashStringValue* options=params.as_hash(param_index++)) {
642: int valid_options=separators.load(*options);
643: if(valid_options!=options->count())
644: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
645: }
646:
647: Table& table=GET_SELF(r, VTable).table();
648:
649: #ifdef USE_STRINGSTREAM
650: pa_stringstream ost(std::stringstream::out);
651:
652: table_to_csv(ost, table, separators, output_column_names);
653:
654: r.write_no_lang(*new VString(*new String(pa_strdup(ost.str().c_str()), String::L_CLEAN)));
655: #else
656: String sdata;
657:
658: table_to_csv(sdata, table, separators, output_column_names);
659:
660: r.write_no_lang(*new VString(*new String(sdata.cstr(), String::L_CLEAN)));
661: #endif
1.224 misha 662: }
663:
1.280 misha 664: static void _count(Request& r, MethodParams& params) {
665: Table& table=GET_SELF(r, VTable).table();
666: size_t result=0;
667: if(params.count()) {
668: const String& param=params.as_string(0, PARAMETER_MUST_BE_STRING);
669: if(param == "columns")
670: result = table.columns() ? table.columns()->count() : 0;
671: else if(param == "cells")
672: result = table.count() ? table[table.current()]->count() : 0;
673: else if(param == "rows") // synonim for ^table.count[]
674: result = table.count();
675: else
676: throw Exception(PARSER_RUNTIME, ¶m, "parameter must be 'columns', 'cells' and 'rows' only");
677: } else
678: result = table.count();
679:
1.182 paf 680: r.write_no_lang(*new VInt(result));
1.6 paf 681: }
682:
1.182 paf 683: static void _line(Request& r, MethodParams&) {
684: int result=1+GET_SELF(r, VTable).table().current();
685: r.write_no_lang(*new VInt(result));
1.6 paf 686: }
687:
1.182 paf 688: static void _offset(Request& r, MethodParams& params) {
689: Table& table=GET_SELF(r, VTable).table();
690: if(params.count()) {
1.133 paf 691: bool absolute=false;
1.182 paf 692: if(params.count()>1) {
693: const String& whence=params.as_string(0, "whence must be string");
1.133 paf 694: if(whence=="cur")
1.134 paf 695: absolute=false;
1.133 paf 696: else if(whence=="set")
1.134 paf 697: absolute=true;
1.133 paf 698: else
1.226 misha 699: throw Exception(PARSER_RUNTIME,
1.134 paf 700: &whence,
701: "is invalid whence, valid are 'cur' or 'set'");
1.157 paf 702: }
1.133 paf 703:
1.211 paf 704: int offset=params.as_int(params.count()-1, "offset must be expression", r);
705: table.offset(absolute, offset);
1.151 paf 706: } else
1.182 paf 707: r.write_no_lang(*new VInt(table.current()));
1.6 paf 708: }
709:
1.182 paf 710: static void _menu(Request& r, MethodParams& params) {
1.263 misha 711: InCycle temp(r);
1.221 paf 712:
1.182 paf 713: Value& body_code=params.as_junction(0, "body must be code");
1.7 paf 714:
1.182 paf 715: Value* delim_maybe_code=params.count()>1?¶ms[1]:0;
1.7 paf 716:
1.182 paf 717: Table& table=GET_SELF(r, VTable).table();
1.293 misha 718: size_t saved_current=table.current();
719: size_t size=table.count();
1.7 paf 720:
1.251 misha 721: if(delim_maybe_code) { // delimiter set
1.250 misha 722: bool need_delim=false;
1.293 misha 723: for(size_t row=0; row<size; row++) {
1.250 misha 724: table.set_current(row);
725:
726: StringOrValue sv_processed=r.process(body_code);
727: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
728:
729: const String* s_processed=sv_processed.get_string();
1.251 misha 730: if(s_processed && !s_processed->is_empty()) { // we have body
1.250 misha 731: if(need_delim) // need delim & iteration produced string?
732: r.write_pass_lang(r.process(*delim_maybe_code));
733: else
734: need_delim=true;
735: }
736:
737: r.write_pass_lang(sv_processed);
1.242 misha 738:
1.250 misha 739: if(lskip==Request::SKIP_BREAK)
740: break;
741: }
742: } else {
1.293 misha 743: for(size_t row=0; row<size; row++) {
1.250 misha 744: table.set_current(row);
745:
746: r.process_write(body_code);
747: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
748:
749: if(lskip==Request::SKIP_BREAK)
750: break;
1.7 paf 751: }
752: }
1.99 parser 753: table.set_current(saved_current);
1.7 paf 754: }
755:
1.110 parser 756: #ifndef DOXYGEN
1.74 paf 757: struct Row_info {
1.166 paf 758: Request *r;
1.74 paf 759: Table *table;
1.182 paf 760: Value* key_code;
761: size_t key_field;
762: Array<int>* value_fields;
763: HashStringValue* hash;
1.174 paf 764: Table2hash_distint distinct;
1.182 paf 765: size_t row;
1.227 misha 766: Table2hash_value_type value_type;
1.74 paf 767: };
1.110 parser 768: #endif
1.182 paf 769: static void table_row_to_hash(Table::element_type row, Row_info *info) {
770: const String* key;
771: if(info->key_code) {
772: info->table->set_current(info->row++); // change context row
773: StringOrValue sv_processed=info->r->process(*info->key_code);
1.166 paf 774: key=&sv_processed.as_string();
1.227 misha 775: } else {
1.182 paf 776: key=info->key_field<row->count()?row->get(info->key_field):0;
1.227 misha 777: }
1.166 paf 778:
779: if(!key)
780: return; // ignore rows without key [too-short-record_array if-indexed]
1.74 paf 781:
1.243 misha 782: bool exist=false;
783: switch(info->value_type) {
784: case C_STRING: {
1.271 misha 785: size_t index=info->value_fields->get(0);
786: exist=info->hash->put_dont_replace(*key, (index < row->count()) ? new VString(*row->get(index)) : new VString());
1.243 misha 787: break;
1.227 misha 788: }
1.243 misha 789: case C_HASH: {
1.182 paf 790: VHash* vhash=new VHash;
791: HashStringValue& hash=vhash->hash();
792: for(Array_iterator<int> i(*info->value_fields); i.has_next(); ) {
793: size_t value_field=i.next();
794: if(value_field<row->count())
1.174 paf 795: hash.put(
1.182 paf 796: *info->table->columns()->get(value_field),
797: new VString(*row->get(value_field)));
1.174 paf 798: }
799:
1.227 misha 800: exist=info->hash->put_dont_replace(*key, vhash);
1.243 misha 801: break;
1.174 paf 802: }
1.243 misha 803: case C_TABLE: {
804: VTable* vtable=(VTable*)info->hash->get(*key); // table exist?
1.174 paf 805: Table* table;
1.227 misha 806: if(vtable) {
1.243 misha 807: if(info->distinct==D_ILLEGAL) {
808: exist=true;
809: break;
810: }
1.174 paf 811: table=vtable->get_table();
1.227 misha 812: } else {
1.174 paf 813: // no? creating table of same structure as source
1.179 paf 814: Table::Action_options table_options(0, 0);
1.182 paf 815: table=new Table(*info->table, table_options/*no rows, just structure*/);
816: info->hash->put(*key, new VTable(table));
1.174 paf 817: }
1.182 paf 818: *table+=row;
1.243 misha 819: break;
1.174 paf 820: }
1.74 paf 821: }
1.227 misha 822: if(exist && info->distinct==D_ILLEGAL)
823: throw Exception(PARSER_RUNTIME,
824: key,
825: "duplicate key");
1.74 paf 826: }
1.235 misha 827:
828: Table2hash_value_type get_value_type(Value& vvalue_type){
829: if(vvalue_type.is_string()) {
830: const String& svalue_type=*vvalue_type.get_string();
831: if(svalue_type == "table"){
832: return C_TABLE;
833: } else if (svalue_type == "string") {
834: return C_STRING;
835: } else if (svalue_type == "hash") {
836: return C_HASH;
837: } else {
838: throw Exception(PARSER_RUNTIME,
839: &svalue_type,
840: "must be 'hash', 'table' or 'string'");
841: }
842: } else {
843: throw Exception(PARSER_RUNTIME,
844: 0,
845: "'type' must be hash");
846: }
847: }
848:
1.182 paf 849: static void _hash(Request& r, MethodParams& params) {
850: Table& self_table=GET_SELF(r, VTable).table();
851: VHash& result=*new VHash;
1.238 misha 852: if(Table::columns_type columns=self_table.columns()){
1.182 paf 853: if(columns->count()>0) {
1.174 paf 854: Table2hash_distint distinct=D_ILLEGAL;
1.227 misha 855: Table2hash_value_type value_type=C_HASH;
1.182 paf 856: int param_index=params.count()-1;
1.166 paf 857: if(param_index>0) {
1.289 misha 858: if(HashStringValue* options=params.as_no_junction(param_index, PARAM_MUST_NOT_BE_CODE).get_hash()){ // can't use .as_has because the 2nd param could be table so .as_hash throws an error
1.166 paf 859: --param_index;
860: int valid_options=0;
1.238 misha 861: if(Value* vdistinct_code=options->get(sql_distinct_name)) { // $.distinct ?
1.166 paf 862: valid_options++;
1.174 paf 863: Value& vdistinct_value=r.process_to_value(*vdistinct_code);
864: if(vdistinct_value.is_string()) {
865: const String& sdistinct=*vdistinct_value.get_string();
1.227 misha 866: if(sdistinct=="tables") {
867: value_type=C_TABLE;
868: distinct=D_FIRST;
1.238 misha 869: } else {
1.226 misha 870: throw Exception(PARSER_RUNTIME,
1.174 paf 871: &sdistinct,
872: "must be 'tables' or true/false");
1.238 misha 873: }
874: } else {
1.174 paf 875: distinct=vdistinct_value.as_bool()?D_FIRST:D_ILLEGAL;
1.238 misha 876: }
1.166 paf 877: }
1.238 misha 878: if(Value* vvalue_type_code=options->get(sql_value_type_name)) { // $.type ?
879: if(value_type==C_TABLE) // $.distinct[tables] already was specified
1.227 misha 880: throw Exception(PARSER_RUNTIME,
881: 0,
1.238 misha 882: "you can't specify $.distinct[tables] and $.type[] together");
883:
884: valid_options++;
885: value_type=get_value_type(r.process_to_value(*vvalue_type_code));
886: }
1.226 misha 887:
1.182 paf 888: if(valid_options!=options->count())
1.272 misha 889: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.163 paf 890: }
891: }
1.238 misha 892:
1.289 misha 893: if(param_index==2) // options was specified but not as hash
894: throw Exception(PARSER_RUNTIME, 0, "options must be hash");
895:
1.182 paf 896: Array<int> value_fields;
1.238 misha 897: if(param_index==0){ // list of columns wasn't specified
898: if(value_type==C_STRING) // $.type[string]
899: throw Exception(PARSER_RUNTIME,
900: 0,
901: "you must specify one value field with option $.type[string]");
902:
903: for(size_t i=0; i<columns->count(); i++) // by all columns, including key
904: value_fields+=i;
905:
906: } else { // list of columns was specified
1.227 misha 907: if(value_type==C_TABLE)
908: throw Exception(PARSER_RUNTIME,
1.174 paf 909: 0,
1.238 misha 910: "you can't specify value field(s) with option $.distinct[tables] or $.type[tables]");
911:
1.182 paf 912: Value& value_fields_param=params.as_no_junction(param_index, "value field(s) must not be code");
1.238 misha 913: if(value_fields_param.is_string()) { // one column as string was specified
914: value_fields+=self_table.column_name2index(*value_fields_param.get_string(), true);
915: } else if(Table* value_fields_table=value_fields_param.get_table()) { // list of columns were specified in table
916: for(Array_iterator<Table::element_type> i(*value_fields_table); i.has_next(); ) {
917: const String& value_field_name =*i.next()->get(0);
918: value_fields +=self_table.column_name2index(value_field_name, true);
1.123 parser 919: }
920: } else
1.226 misha 921: throw Exception(PARSER_RUNTIME,
1.182 paf 922: 0,
1.226 misha 923: "value field(s) must be string or table");
1.239 misha 924: }
1.74 paf 925:
1.227 misha 926: if(value_type==C_STRING && value_fields.count()!=1)
927: throw Exception(PARSER_RUNTIME,
928: 0,
1.238 misha 929: "you can specify only one value field with option $.type[string]");
1.182 paf 930:
931: {
932: Value* key_param=¶ms[0];
1.193 paf 933: Row_info info={
934: &r,
935: &self_table,
936: /*key_code=*/key_param->get_junction()?key_param:0,
1.197 paf 937: /*key_field=*/0/*filled below*/,
1.193 paf 938: &value_fields,
939: &result.hash(),
940: distinct,
1.227 misha 941: /*row=*/0,
942: value_type
1.193 paf 943: };
1.195 paf 944: info.key_field=(info.key_code?-1
945: :self_table.column_name2index(key_param->as_string(), true));
1.182 paf 946:
947: int saved_current=self_table.current();
948: self_table.for_each(table_row_to_hash, &info);
949: self_table.set_current(saved_current);
1.207 paf 950:
951: result.extract_default();
1.182 paf 952: }
1.74 paf 953: }
1.238 misha 954: }
1.97 parser 955: r.write_no_lang(result);
1.74 paf 956: }
957:
1.110 parser 958: #ifndef DOXYGEN
1.78 paf 959: struct Table_seq_item {
1.182 paf 960: ArrayString* row;
1.34 paf 961: union {
1.182 paf 962: const char *c_str;
1.34 paf 963: double d;
964: } value;
1.32 paf 965: };
1.110 parser 966: #endif
1.34 paf 967: static int sort_cmp_string(const void *a, const void *b) {
968: return strcmp(
1.78 paf 969: static_cast<const Table_seq_item *>(a)->value.c_str,
970: static_cast<const Table_seq_item *>(b)->value.c_str
1.34 paf 971: );
972: }
973: static int sort_cmp_double(const void *a, const void *b) {
1.78 paf 974: double va=static_cast<const Table_seq_item *>(a)->value.d;
975: double vb=static_cast<const Table_seq_item *>(b)->value.d;
1.34 paf 976: if(va<vb)
977: return -1;
978: else if(va>vb)
979: return +1;
980: else
981: return 0;
982: }
1.182 paf 983: static void _sort(Request& r, MethodParams& params) {
984: Value& key_maker=params.as_junction(0, "key-maker must be code");
1.61 paf 985:
1.182 paf 986: bool reverse=params.count()>1/*..[desc|asc|]*/?
987: reverse=params.as_no_junction(1, "order must not be code").as_string()=="desc":
1.104 parser 988: false; // default=asc
1.32 paf 989:
1.182 paf 990: Table& old_table=GET_SELF(r, VTable).table();
991: Table& new_table=*new Table(old_table.columns());
1.34 paf 992:
1.182 paf 993: Table_seq_item* seq=new(PointerFreeGC) Table_seq_item[old_table.count()];
1.34 paf 994: int i;
995:
996: // calculate key values
997: bool key_values_are_strings=true;
1.182 paf 998: int old_count=old_table.count();
999: for(i=0; i<old_count; i++) {
1.101 parser 1000: old_table.set_current(i);
1.32 paf 1001: // calculate key value
1.182 paf 1002: seq[i].row=old_table[i];
1.287 moko 1003: Value& value=r.process_to_value(key_maker);
1.34 paf 1004: if(i==0) // determining key values type by first one
1005: key_values_are_strings=value.is_string();
1006:
1007: if(key_values_are_strings)
1008: seq[i].value.c_str=value.as_string().cstr();
1009: else
1.287 moko 1010: seq[i].value.d=value.as_expr_result().as_double();
1.32 paf 1011: }
1.265 misha 1012:
1013: // @todo: handle this elsewhere
1014: if(r.charsets.source().NAME()=="KOI8-R" && key_values_are_strings) {
1015: for(i=0; i<old_count; i++)
1016: if(*seq[i].value.c_str)
1017: seq[i].value.c_str=Charset::transcode(seq[i].value.c_str, r.charsets.source(), UTF8_charset).cstr();
1018: }
1019:
1.266 misha 1020: // sort keys
1.295 moko 1021: qsort(seq, old_count, sizeof(Table_seq_item), key_values_are_strings?sort_cmp_string:sort_cmp_double);
1.32 paf 1022:
1.34 paf 1023: // reorder table as they require in 'seq'
1.182 paf 1024: for(i=0; i<old_count; i++)
1025: new_table+=Table::element_type(seq[reverse?old_count-1-i:i].row);
1026:
1027: delete[] seq;
1.32 paf 1028:
1.116 parser 1029: // replace any previous table value
1.182 paf 1030: GET_SELF(r, VTable).set_table(new_table);
1.32 paf 1031: }
1032:
1.176 paf 1033: #ifndef DOXYGEN
1.182 paf 1034: struct Expression_is_true_info {
1.176 paf 1035: Request* r;
1036: Value* expression_code;
1037: };
1038: #endif
1.275 misha 1039:
1.191 paf 1040: static bool expression_is_true(Table&, Expression_is_true_info* info) {
1041: return info->r->process_to_value(*info->expression_code).as_bool();
1.176 paf 1042: }
1.275 misha 1043:
1044: static bool _locate_expression(Table& table, Request& r, MethodParams& params) {
1.182 paf 1045: Value& expression_code=params.as_junction(0, "must be expression");
1.275 misha 1046: const size_t options_index=1;
1047: Table::Action_options o=get_action_options(r, params, options_index, table);
1048: check_option_param(o.defined, params, options_index, "locate by expression only has parameters: expression and, maybe, options");
1.145 paf 1049:
1.182 paf 1050: Expression_is_true_info info={&r, &expression_code};
1051: return table.table_first_that(expression_is_true, &info, o);
1.145 paf 1052: }
1.275 misha 1053:
1054: static bool _locate_name_value(Table& table, Request& r, MethodParams& params) {
1.182 paf 1055: const String& name=params.as_string(0, "column name must be string");
1.232 misha 1056: const String& value=params.as_string(1, VALUE_MUST_BE_STRING);
1.275 misha 1057: const size_t options_index=2;
1058: Table::Action_options o=get_action_options(r, params, options_index, table);
1059: check_option_param(o.defined, params, options_index, "locate by name has parameters: name, value and, maybe, options");
1060:
1.182 paf 1061: return table.locate(name, value, o);
1062: }
1.275 misha 1063:
1.182 paf 1064: static void _locate(Request& r, MethodParams& params) {
1065: Table& table=GET_SELF(r, VTable).table();
1.72 paf 1066:
1.291 moko 1067: bool result=params[0].get_junction() || (params.count() == 1) ?
1.275 misha 1068: _locate_expression(table, r, params) :
1069: _locate_name_value(table, r, params);
1.249 misha 1070: r.write_no_lang(VBool::get(result));
1.145 paf 1071: }
1.182 paf 1072:
1073:
1.191 paf 1074: static void _flip(Request& r, MethodParams&) {
1.182 paf 1075: Table& old_table=GET_SELF(r, VTable).table();
1.184 paf 1076: Table& new_table=*new Table(0);
1.182 paf 1077: if(size_t old_count=old_table.count())
1.270 misha 1078: if(size_t old_cols=old_table.columns()?old_table.columns()->count():old_table[0]->count())
1.182 paf 1079: for(size_t column=0; column<old_cols; column++) {
1080: Table::element_type new_row(new ArrayString(old_count));
1081: for(size_t i=0; i<old_count; i++) {
1082: Table::element_type old_row=old_table[i];
1083: *new_row+=column<old_row->count()?old_row->get(column):new String;
1.39 paf 1084: }
1.182 paf 1085: new_table+=new_row;
1.39 paf 1086: }
1087:
1.182 paf 1088: r.write_no_lang(*new VTable(&new_table));
1.39 paf 1089: }
1090:
1.293 misha 1091: static void _foreach(Request& r, MethodParams& params) {
1092: InCycle temp(r);
1093:
1094: const String& rownum_name=params.as_string(0, "rownum-var name must be string");
1095: const String& value_name=params.as_string(1, "value-var name must be string");
1096:
1097: Value& body_code=params.as_junction(2, "body must be code");
1098:
1099: Value* delim_maybe_code=params.count()>3?¶ms[3]:0;
1100:
1101: Table& table=GET_SELF(r, VTable).table();
1102: size_t saved_current=table.current();
1103: size_t size=table.count();
1104:
1105: const String* rownum_var_name=rownum_name.is_empty()? 0 : &rownum_name;
1106: const String* value_var_name=value_name.is_empty()? 0 : &value_name;
1107:
1108: Value* var_context=r.get_method_frame()->caller();
1109:
1110: if(delim_maybe_code) { // delimiter set
1111: bool need_delim=false;
1112: for(size_t row=0; row<size; row++) {
1113: table.set_current(row);
1114:
1115: if(rownum_var_name)
1.299 moko 1116: r.put_element(*var_context, *rownum_var_name, new VString(*new String(String::Body::Format(row), String::L_CLEAN)));
1.293 misha 1117: if(value_var_name)
1.299 moko 1118: r.put_element(*var_context, *value_var_name, new VTable(&table));
1.293 misha 1119:
1120: StringOrValue sv_processed=r.process(body_code);
1121: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1122:
1123: const String* s_processed=sv_processed.get_string();
1124: if(s_processed && !s_processed->is_empty()) { // we have body
1125: if(need_delim) // need delim & iteration produced string?
1126: r.write_pass_lang(r.process(*delim_maybe_code));
1127: else
1128: need_delim=true;
1129: }
1130:
1131: r.write_pass_lang(sv_processed);
1132:
1133: if(lskip==Request::SKIP_BREAK)
1134: break;
1135: }
1136: } else {
1137: for(size_t row=0; row<size; row++) {
1138: table.set_current(row);
1139:
1140: if(rownum_var_name)
1.300 moko 1141: r.put_element(*var_context, *rownum_var_name, new VString(*new String(String::Body::Format(row), String::L_CLEAN)));
1.293 misha 1142: if(value_var_name)
1.300 moko 1143: r.put_element(*var_context, *value_var_name, new VTable(&table));
1.293 misha 1144:
1145: r.process_write(body_code);
1146: Request::Skip lskip=r.get_skip(); r.set_skip(Request::SKIP_NOTHING);
1147:
1148: if(lskip==Request::SKIP_BREAK)
1149: break;
1150: }
1151: }
1152: table.set_current(saved_current);
1153: }
1154:
1.182 paf 1155: static void _append(Request& r, MethodParams& params) {
1156: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
1.266 misha 1157: const String& string=r.process_to_string(params[0]);
1.41 paf 1158:
1159: // parse cells
1.182 paf 1160: Table::element_type row=new ArrayString;
1161: size_t pos_after=0;
1162: string.split(*row, pos_after, "\t", String::L_AS_IS);
1.41 paf 1163:
1.182 paf 1164: GET_SELF(r, VTable).table()+=row;
1.41 paf 1165: }
1166:
1.182 paf 1167: static void join_named_row(Table& src, Table* dest) {
1168: Table::columns_type dest_columns=dest->columns();
1169: size_t dest_columns_count=dest_columns->count();
1170: Table::element_type dest_row(new ArrayString(dest_columns_count));
1171: for(size_t dest_column=0; dest_column<dest_columns_count; dest_column++) {
1172: const String* src_item=src.item(*dest_columns->get(dest_column));
1173: *dest_row+=src_item?src_item:new String;
1174: }
1175: *dest+=dest_row;
1176: }
1177: static void join_nameless_row(Table& src, Table* dest) {
1178: *dest+=src[src.current()];
1179: }
1180: static void _join(Request& r, MethodParams& params) {
1.288 misha 1181: Table& src=*params.as_table(0, "source");
1.176 paf 1182:
1.268 misha 1183: Table::Action_options o=get_action_options(r, params, 1, src);
1.288 misha 1184: check_option_param(o.defined, params, 1, "invalid extra parameter");
1.42 paf 1185:
1.182 paf 1186: Table& dest=GET_SELF(r, VTable).table();
1.42 paf 1187: if(&src == &dest)
1.226 misha 1188: throw Exception(PARSER_RUNTIME,
1.182 paf 1189: 0,
1.42 paf 1190: "source and destination are same table");
1191:
1.193 paf 1192: if(dest.columns()) // dest is named
1.182 paf 1193: src.table_for_each(join_named_row, &dest, o);
1194: else // dest is nameless
1195: src.table_for_each(join_nameless_row, &dest, o);
1.42 paf 1196: }
1197:
1.94 parser 1198: #ifndef DOXYGEN
1.169 paf 1199: class Table_sql_event_handlers: public SQL_Driver_query_event_handlers {
1.182 paf 1200: ArrayString& columns;
1.218 paf 1201: int columns_count;
1.182 paf 1202: ArrayString* row;
1.94 parser 1203: public:
1.182 paf 1204: Table* table;
1205: public:
1206: Table_sql_event_handlers() :
1207: columns(*new ArrayString), row(0), table(0) {
1.94 parser 1208: }
1209:
1.279 misha 1210: bool add_column(SQL_Error& error, const char *str, size_t ) {
1.170 paf 1211: try {
1.274 moko 1212: columns+=new String(str, String::L_TAINTED /* no length as 0x00 can be inside */);
1.170 paf 1213: return false;
1214: } catch(...) {
1215: error=SQL_Error("exception occured in Table_sql_event_handlers::add_column");
1216: return true;
1217: }
1218: }
1219: bool before_rows(SQL_Error& error) {
1220: try {
1.182 paf 1221: table=new Table(&columns);
1.218 paf 1222: columns_count=columns.count();
1.170 paf 1223: return false;
1224: } catch(...) {
1225: error=SQL_Error("exception occured in Table_sql_event_handlers::before_rows");
1226: return true;
1227: }
1228: }
1229: bool add_row(SQL_Error& error) {
1230: try {
1.218 paf 1231: *table+=row=new ArrayString(columns_count);
1.170 paf 1232: return false;
1233: } catch(...) {
1234: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row");
1235: return true;
1236: }
1237: }
1.279 misha 1238: bool add_row_cell(SQL_Error& error, const char* str, size_t ) {
1.170 paf 1239: try {
1.292 misha 1240: *row+=str?new String(str, String::L_TAINTED /* no length as 0x00 can be inside */):&String::Empty;
1.170 paf 1241: return false;
1242: } catch(...) {
1243: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row_cell");
1244: return true;
1245: }
1.94 parser 1246: }
1247: };
1248: #endif
1.204 paf 1249:
1250: static void marshal_bind(
1251: HashStringValue::key_type aname,
1252: HashStringValue::value_type avalue,
1253: SQL_Driver::Placeholder** pptr)
1254: {
1255: SQL_Driver::Placeholder& ph=**pptr;
1256: ph.name=aname.cstr();
1.261 misha 1257: ph.value=avalue->as_string().untaint_cstr(String::L_AS_IS);
1.204 paf 1258: ph.is_null=avalue->get_class()==void_class;
1259: ph.were_updated=false;
1260:
1261: (*pptr)++;
1262: }
1263:
1264: // not static, used elsewhere
1265: int marshal_binds(HashStringValue& hash, SQL_Driver::Placeholder*& placeholders) {
1266: int hash_count=hash.count();
1.302 ! moko 1267: placeholders=new SQL_Driver::Placeholder[hash_count];
1.204 paf 1268: SQL_Driver::Placeholder* ptr=placeholders;
1.221 paf 1269: hash.for_each<SQL_Driver::Placeholder**>(marshal_bind, &ptr);
1.204 paf 1270: return hash_count;
1271: }
1272:
1273: // not static, used elsewhere
1274: void unmarshal_bind_updates(HashStringValue& hash, int placeholder_count, SQL_Driver::Placeholder* placeholders) {
1275: SQL_Driver::Placeholder* ph=placeholders;
1276: for(int i=0; i<placeholder_count; i++, ph++)
1277: if(ph->were_updated) {
1278: Value* value;
1279: if(ph->is_null)
1.248 misha 1280: value=VVoid::get();
1.204 paf 1281: else
1.256 misha 1282: value=new VString(*new String(ph->value, String::L_TAINTED));
1.204 paf 1283: hash.put(ph->name, value);
1284: }
1285: }
1286:
1.182 paf 1287: static void _sql(Request& r, MethodParams& params) {
1288: Value& statement=params.as_junction(0, "statement must be code");
1.49 paf 1289:
1.204 paf 1290: HashStringValue* bind=0;
1.244 misha 1291: ulong limit=SQL_NO_LIMIT;
1.100 parser 1292: ulong offset=0;
1.281 misha 1293: if(params.count()>1)
1.288 misha 1294: if(HashStringValue* options=params.as_hash(1, "sql options")) {
1.281 misha 1295: int valid_options=0;
1296: if(Value* vbind=options->get(sql_bind_name)) {
1297: valid_options++;
1298: bind=vbind->get_hash();
1299: }
1300: if(Value* vlimit=options->get(sql_limit_name)) {
1301: valid_options++;
1302: limit=(ulong)r.process_to_value(*vlimit).as_double();
1303: }
1304: if(Value* voffset=options->get(sql_offset_name)) {
1305: valid_options++;
1306: offset=(ulong)r.process_to_value(*voffset).as_double();
1307: }
1308: if(valid_options!=options->count())
1309: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1310: }
1.49 paf 1311:
1.204 paf 1312: SQL_Driver::Placeholder* placeholders=0;
1313: uint placeholders_count=0;
1314: if(bind)
1315: placeholders_count=marshal_binds(*bind, placeholders);
1316:
1.182 paf 1317: Temp_lang temp_lang(r, String::L_SQL);
1318: const String& statement_string=r.process_to_string(statement);
1.262 misha 1319: const char* statement_cstr=statement_string.untaint_cstr(r.flang, r.connection());
1.260 misha 1320:
1.182 paf 1321: Table_sql_event_handlers handlers;
1.294 moko 1322:
1.182 paf 1323: r.connection()->query(
1.203 paf 1324: statement_cstr,
1.208 paf 1325: placeholders_count, placeholders,
1.203 paf 1326: offset, limit,
1.160 paf 1327: handlers,
1328: statement_string);
1.135 paf 1329:
1.204 paf 1330: if(bind)
1331: unmarshal_bind_updates(*bind, placeholders_count, placeholders);
1.96 parser 1332:
1.182 paf 1333: Table& result=
1334: handlers.table?*handlers.table: // query resulted in table? return it
1335: *new Table(Table::columns_type(0)); // query returned no table, fake it
1.49 paf 1336:
1337: // replace any previous table value
1.182 paf 1338: GET_SELF(r, VTable).set_table(result);
1.49 paf 1339: }
1340:
1.233 misha 1341: static void _columns(Request& r, MethodParams& params) {
1342: const String* column_column_name;
1343: if(params.count()>0)
1344: column_column_name=¶ms.as_string(0, COLUMN_NAME_MUST_BE_STRING);
1345: else
1346: column_column_name=new String("column");
1.88 parser 1347:
1.182 paf 1348: Table::columns_type result_columns(new ArrayString);
1.233 misha 1349: *result_columns+=column_column_name;
1.182 paf 1350: Table& result_table=*new Table(result_columns);
1.88 parser 1351:
1.182 paf 1352: Table& source_table=GET_SELF(r, VTable).table();
1353: if(Table::columns_type source_columns=source_table.columns()) {
1354: for(Array_iterator<const String*> i(*source_columns); i.has_next(); ) {
1355: Table::element_type result_row(new ArrayString);
1356: *result_row+=i.next();
1357: result_table+=result_row;
1.88 parser 1358: }
1359: }
1360:
1.182 paf 1361: r.write_no_lang(*new VTable(&result_table));
1.88 parser 1362: }
1363:
1.182 paf 1364: static void _select(Request& r, MethodParams& params) {
1.231 misha 1365: Value& vcondition=params.as_expression(0, "condition must be number, bool or expression");
1.148 paf 1366:
1.182 paf 1367: Table& source_table=GET_SELF(r, VTable).table();
1.148 paf 1368:
1.277 moko 1369: int limit=source_table.count();
1.282 misha 1370: int offset=0;
1371: bool reverse=false;
1.278 moko 1372:
1.281 misha 1373: if(params.count()>1)
1374: if(HashStringValue* options=params.as_hash(1)) {
1375: int valid_options=0;
1376: if(Value* vlimit=options->get(sql_limit_name)) {
1377: valid_options++;
1378: limit=r.process_to_value(*vlimit).as_int();
1379: }
1380: if(Value* voffset=options->get(sql_offset_name)) {
1381: valid_options++;
1382: offset=r.process_to_value(*voffset).as_int();
1383: }
1384: if(Value* vreverse=options->get(table_reverse_name)) {
1385: valid_options++;
1386: reverse=r.process_to_value(*vreverse).as_bool();
1387: }
1388: if(valid_options!=options->count())
1.288 misha 1389: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.281 misha 1390: }
1391:
1392: Table& result_table=*new Table(source_table.columns());
1.277 moko 1393:
1.283 misha 1394: size_t size=source_table.count();
1395: if(offset<0)
1396: offset+=size;
1.284 misha 1397: if(size && limit>0 && offset>=0 && (size_t)offset<size){
1.282 misha 1398: size_t saved_current=source_table.current();
1399: size_t appended=0;
1400:
1401: if(reverse){
1402: for(size_t row=size-1; result_table.count() < (size_t)limit; row--) {
1403: source_table.set_current(row);
1404:
1405: bool condition=r.process_to_value(vcondition, false/*don't intercept string*/).as_bool();
1406:
1407: if(condition && ++appended > (size_t)offset) // ...condition is true, adding to the result
1408: result_table+=source_table[row];
1409: if(row==0) break;
1410: }
1411: } else {
1412: for(size_t row=0; row < size && result_table.count() < (size_t)limit; row++) {
1413: source_table.set_current(row);
1.148 paf 1414:
1.282 misha 1415: bool condition=r.process_to_value(vcondition, false/*don't intercept string*/).as_bool();
1.277 moko 1416:
1.282 misha 1417: if(condition && ++appended > (size_t)offset) // ...condition is true, adding to the result
1418: result_table+=source_table[row];
1419: }
1.277 moko 1420: }
1.282 misha 1421: source_table.set_current(saved_current);
1.148 paf 1422: }
1423:
1.182 paf 1424: r.write_no_lang(*new VTable(&result_table));
1.148 paf 1425: }
1426:
1.66 paf 1427: // constructor
1428:
1.182 paf 1429: MTable::MTable(): Methoded("table") {
1.142 paf 1430: // ^table::create{data}
1431: // ^table::create[nameless]{data}
1432: // ^table::create[table]
1.236 misha 1433: add_native_method("create", Method::CT_DYNAMIC, _create, 1, 3);
1.142 paf 1434: // old name for compatibility with <= v 1.141 2002/01/25 11:33:45 paf
1.236 misha 1435: add_native_method("set", Method::CT_DYNAMIC, _create, 1, 3);
1.2 paf 1436:
1.142 paf 1437: // ^table::load[file]
1438: // ^table::load[nameless;file]
1.168 paf 1439: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 3);
1.22 paf 1440:
1441: // ^table.save[file]
1442: // ^table.save[nameless;file]
1.188 paf 1443: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 3);
1.6 paf 1444:
1.224 misha 1445: // add_native_method("save_old", Method::CT_DYNAMIC, _save_old, 1, 3);
1446:
1.297 moko 1447: // ^table.csv-string[]
1448: // ^table.csv-string[nameless]
1449: // ^table.csv-string[nameless;$.encloser["] $.separator[,]]
1450: add_native_method("csv-string", Method::CT_DYNAMIC, _csv_string, 0, 2);
1451:
1.6 paf 1452: // ^table.count[]
1.280 misha 1453: // ^table.count[rows]
1454: // ^table.count[columns]
1455: // ^table.count[cells]
1456: add_native_method("count", Method::CT_DYNAMIC, _count, 0, 1);
1.6 paf 1457:
1458: // ^table.line[]
1.66 paf 1459: add_native_method("line", Method::CT_DYNAMIC, _line, 0, 0);
1.6 paf 1460:
1.10 paf 1461: // ^table.offset[]
1.133 paf 1462: // ^table.offset(offset)
1463: // ^table.offset[cur|set](offset)
1464: add_native_method("offset", Method::CT_DYNAMIC, _offset, 0, 2);
1.7 paf 1465:
1.10 paf 1466: // ^table.menu{code}
1467: // ^table.menu{code}[delim]
1.66 paf 1468: add_native_method("menu", Method::CT_DYNAMIC, _menu, 1, 2);
1.74 paf 1469:
1.239 misha 1470: // ^table.hash[key field name]
1471: // ^table.hash[key field name][value field name(s) string/table]
1.163 paf 1472: add_native_method("hash", Method::CT_DYNAMIC, _hash, 1, 3);
1.32 paf 1473:
1.102 parser 1474: // ^table.sort{string-key-maker} ^table.sort{string-key-maker}[desc|asc]
1475: // ^table.sort(numeric-key-maker) ^table.sort(numeric-key-maker)[desc|asc]
1.66 paf 1476: add_native_method("sort", Method::CT_DYNAMIC, _sort, 1, 2);
1.8 paf 1477:
1.36 paf 1478: // ^table.locate[field;value]
1.176 paf 1479: add_native_method("locate", Method::CT_DYNAMIC, _locate, 1, 3);
1.39 paf 1480:
1481: // ^table.flip[]
1.66 paf 1482: add_native_method("flip", Method::CT_DYNAMIC, _flip, 0, 0);
1.41 paf 1483:
1.293 misha 1484: // ^table.foreach[row-num;value]{code}
1485: // ^table.foreach[row-num;value]{code}[delim]
1486: add_native_method("foreach", Method::CT_DYNAMIC, _foreach, 3, 4);
1487:
1.41 paf 1488: // ^table.append{r{tab}e{tab}c{tab}o{tab}r{tab}d}
1.66 paf 1489: add_native_method("append", Method::CT_DYNAMIC, _append, 1, 1);
1.42 paf 1490:
1.157 paf 1491: // ^table.join[table][$.limit(10) $.offset(1) $.offset[cur] ]
1492: add_native_method("join", Method::CT_DYNAMIC, _join, 1, 2);
1.49 paf 1493:
1494:
1.239 misha 1495: // ^table::sql[query]
1496: // ^table::sql[query][$.limit(1) $.offset(2)]
1.100 parser 1497: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.88 parser 1498:
1.239 misha 1499: // ^table.columns[[column name]]
1.233 misha 1500: add_native_method("columns", Method::CT_DYNAMIC, _columns, 0, 1);
1.148 paf 1501:
1502: // ^table.select(expression) = table
1.277 moko 1503: add_native_method("select", Method::CT_DYNAMIC, _select, 1, 2);
1.40 paf 1504: }
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