Annotation of parser3/src/classes/table.C, revision 1.182.4.2
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:
1.182.4.2! paf 8: static const char* IDENT_TABLE_C="$Date: 2003/09/23 09:54:28 $";
1.1 paf 9:
1.105 parser 10: #include "classes.h"
1.182 paf 11: #include "pa_vmethod_frame.h"
12:
1.16 paf 13: #include "pa_common.h"
1.1 paf 14: #include "pa_request.h"
15: #include "pa_vtable.h"
1.6 paf 16: #include "pa_vint.h"
1.51 paf 17: #include "pa_sql_connection.h"
1.72 paf 18: #include "pa_vbool.h"
1.1 paf 19:
1.66 paf 20: // class
21:
1.182 paf 22: class MTable: public Methoded {
1.66 paf 23: public: // VStateless_class
1.182 paf 24: Value* create_new_value() { return new VTable(); }
1.66 paf 25:
26: public:
1.182 paf 27: MTable();
1.70 paf 28:
29: public: // Methoded
1.66 paf 30: bool used_directly() { return true; }
31: };
1.1 paf 32:
1.182 paf 33: // global variable
34:
35: DECLARE_CLASS_VAR(table, new MTable, 0);
36:
37: // defines for globals
38:
39: #define SQL_LIMIT_NAME "limit"
40: #define SQL_OFFSET_NAME "offset"
41: #define SQL_DEFAULT_NAME "default"
42: #define SQL_DISTINCT_NAME "distinct"
43: #define TABLE_REVERSE_NAME "reverse"
44:
45: // globals
46:
47: String sql_limit_name(SQL_LIMIT_NAME);
48: String sql_offset_name(SQL_OFFSET_NAME);
49: String sql_default_name(SQL_DEFAULT_NAME);
50: String sql_distinct_name(SQL_DISTINCT_NAME);
51: String table_reverse_name(TABLE_REVERSE_NAME);
52:
1.1 paf 53: // methods
1.66 paf 54:
1.182 paf 55: static Table::Action_options get_action_options(Request& r, MethodParams& params,
56: const Table& source) {
1.176 paf 57: Table::Action_options result;
1.182 paf 58: if(!params.count())
59: return result;
60:
61: Value& maybe_options=params.last();
62: /* can not do it:
63: want to enable ^table::create[$source;
64: # $.option[]
65: ]
66: but there is ^table.locate[name;value]
1.176 paf 67:
1.182 paf 68: if(maybe_options.is_string()) { // allow empty options
69: result.defined=true;
1.176 paf 70: return result;
1.182 paf 71: }
72: */
73: HashStringValue* options=maybe_options.get_hash();
1.176 paf 74: if(!options)
75: return result;
76:
77: result.defined=true;
78: bool defined_offset=false;
79:
80: int valid_options=0;
1.182 paf 81: if(Value* voffset=options->get(sql_offset_name)) {
1.176 paf 82: valid_options++;
83: defined_offset=true;
84: if(voffset->is_string()) {
1.182 paf 85: const String& soffset=*voffset->get_string();
1.176 paf 86: if(soffset == "cur")
87: result.offset=source.current();
88: else
1.164 paf 89: throw Exception("parser.runtime",
1.176 paf 90: &soffset,
91: "must be 'cur' string or expression");
92: } else
93: result.offset=r.process_to_value(*voffset).as_int();
94: }
1.182 paf 95: if(Value* vlimit=options->get(sql_limit_name)) {
1.176 paf 96: valid_options++;
97: result.limit=r.process_to_value(*vlimit).as_int();
98: }
1.182 paf 99: if(Value *vreverse=(Value *)options->get(table_reverse_name)) {
100: valid_options++;
101: result.reverse=r.process_to_value(*vreverse).as_bool();
102: if(result.reverse && !defined_offset)
103: result.offset=source.count()-1;
104: }
105:
106: if(valid_options!=options->count())
1.176 paf 107: throw Exception("parser.runtime",
1.182 paf 108: 0,
1.176 paf 109: "called with invalid option");
110:
111: return result;
112: }
1.180 paf 113: static void check_option_param(bool options_defined,
1.182 paf 114: MethodParams& params, size_t next_param_index,
1.176 paf 115: const char *msg) {
1.182 paf 116: if(next_param_index+(options_defined?1:0) != params.count())
1.176 paf 117: throw Exception("parser.runtime",
1.182 paf 118: 0,
1.176 paf 119: "%s", msg);
1.157 paf 120: }
121:
1.182 paf 122: static void _create(Request& r, MethodParams& params) {
1.157 paf 123: // clone/copy part?
1.182 paf 124: if(Table *source=params[0].get_table()) {
125: Table::Action_options o=get_action_options(r, params, *source);
126: check_option_param(o.defined, params, 1,
1.176 paf 127: "too many parameters");
1.182 paf 128: GET_SELF(r, VTable).set_table(*new Table(*source, o));
1.157 paf 129: return;
130: }
1.142 paf 131:
1.1 paf 132: // data is last parameter
1.182 paf 133: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
134: const String& data=
135: r.process_to_string(params.as_junction(params.count()-1, "body must be code"));
1.44 paf 136:
137: // parse columns
1.182 paf 138: size_t raw_pos_after=0;
139: Table::columns_type columns;
140: if(params.count()==2) {
141: columns=Table::columns_type(0); // nameless
1.21 paf 142: } else {
1.182 paf 143: columns=Table::columns_type(new ArrayString);
1.44 paf 144:
1.182 paf 145: ArrayString head;
146: data.split(head, raw_pos_after, "\n", String::L_AS_IS, 1);
147: if(head.count()) {
148: size_t col_pos_after=0;
149: head[0]->split(*columns, col_pos_after, "\t", String::L_AS_IS);
150: }
1.44 paf 151: }
152:
1.182 paf 153: Table& table=*new Table(columns);
1.44 paf 154: // parse cells
1.182 paf 155:
156: ArrayString rows;
157: data.split(rows, raw_pos_after, "\n", String::L_AS_IS);
158: Array_iterator<const String*> i(rows);
1.98 parser 159: while(i.has_next()) {
1.182 paf 160: Table::element_type row(new ArrayString);
161: const String& string=*i.next();
1.118 parser 162: // remove comment lines
1.182 paf 163: if(!string.length())
1.44 paf 164: continue;
165:
1.182 paf 166: size_t col_pos_after=0;
167: string.split(*row, col_pos_after, "\t", String::L_AS_IS);
168: table+=row;
1.17 paf 169: }
1.1 paf 170:
1.44 paf 171: // replace any previous table value
1.182 paf 172: GET_SELF(r, VTable).set_table(table);
1.44 paf 173: }
174:
1.182 paf 175: static void _load(Request& r, MethodParams& params) {
176: const String& first_param=params.as_string(0, "file name must be string");
1.168 paf 177: int filename_param_index=0;
178: bool nameless=first_param=="nameless";
179: if(nameless)
180: filename_param_index++;
1.182 paf 181: size_t options_param_index=filename_param_index+1;
1.168 paf 182:
1.44 paf 183: // loading text
1.182 paf 184: char *data=file_read_text(r.charsets,
185: r.absolute(params.as_string(filename_param_index, "file name must be string")),
1.168 paf 186: true,
1.182 paf 187: options_param_index<params.count()?params.as_no_junction(options_param_index, "additional params must be hash").get_hash():0
1.168 paf 188: );
1.44 paf 189:
1.1 paf 190: // parse columns
1.182 paf 191: Table::columns_type columns;
1.168 paf 192: if(nameless) {
1.182 paf 193: columns=Table::columns_type(0); // nameless
1.1 paf 194: } else {
1.182 paf 195: columns=Table::columns_type(new ArrayString);
1.1 paf 196:
1.139 paf 197: while(char *row_chars=getrow(&data)) {
198: // remove empty&comment lines
199: if(!*row_chars || *row_chars == '#')
200: continue;
1.1 paf 201: do {
1.182 paf 202: *columns+=new String(lsplit(&row_chars, '\t'), 0, true);
1.1 paf 203: } while(row_chars);
1.139 paf 204:
205: break;
206: }
1.1 paf 207: }
208:
209: // parse cells
1.182.4.2! paf 210: Table& table=*new Table(columns);//что-то очень плохое с realloc'ом: 1000 сильно помогает
1.1 paf 211: char *row_chars;
1.182.4.1 paf 212: int cells=0;
1.1 paf 213: while(row_chars=getrow(&data)) {
1.118 parser 214: // remove empty&comment lines
215: if(!*row_chars || *row_chars == '#')
1.28 paf 216: continue;
1.182 paf 217: Table::element_type row(new ArrayString);
1.1 paf 218: while(char *cell_chars=lsplit(&row_chars, '\t')) {
1.182 paf 219: *row+=new String(cell_chars, 0, true);
1.182.4.1 paf 220: cells++;
1.1 paf 221: }
222: table+=row;
223: };
224:
225: // replace any previous table value
1.182 paf 226: GET_SELF(r, VTable).set_table(table);
1.1 paf 227: }
1.2 paf 228:
1.146 paf 229: /// @todo "x\nx" "xxx""xx"
1.182 paf 230: static void _save(Request& r, MethodParams& params) {
231: Value& vfile_name=params.as_no_junction(params.count()-1, "file name must not be code");
1.22 paf 232:
1.182 paf 233: Table& table=GET_SELF(r, VTable).table();
1.31 paf 234:
1.129 paf 235: bool do_append=false;
1.182 paf 236: String sdata;
237: if(params.count()==1) { // named output
1.31 paf 238: // write out names line
239: if(table.columns()) { // named table
1.182 paf 240: for(Array_iterator<const String*> i(*table.columns()); i.has_next(); ) {
241: sdata.append(*i.next(), String::L_TABLE);
1.98 parser 242: if(i.has_next())
1.182 paf 243: sdata.append_know_length("\t", 1, String::L_CLEAN);
1.31 paf 244: }
245: } else { // nameless table
1.182 paf 246: if(int lsize=table.count()?table[0]->count():0)
1.31 paf 247: for(int column=0; column<lsize; column++) {
1.182 paf 248: char *cindex_tab=new(PointerFreeGC) char[MAX_NUMBER];
249: sdata.append_know_length(cindex_tab,
250: snprintf(cindex_tab, MAX_NUMBER, "%d\t", column),
251: String::L_CLEAN);
1.31 paf 252: }
253: else
1.182 paf 254: sdata.append_help_length("empty nameless table", 0, String::L_CLEAN);
1.31 paf 255: }
1.182 paf 256: sdata.append_know_length("\n", 1, String::L_CLEAN);
1.129 paf 257: } else { // mode specified
1.182 paf 258: const String& mode=params.as_string(0, "mode must be string");
1.129 paf 259: if(mode=="append")
260: do_append=true;
261: else if(mode=="nameless")
262: /*ok, already skipped names output*/;
263: else
1.146 paf 264: throw Exception("parser.runtime",
1.129 paf 265: &mode,
266: "unknown mode, must be 'append'");
267:
1.31 paf 268: }
269: // data lines
1.182 paf 270: Array_iterator<ArrayString*> i(table);
1.98 parser 271: while(i.has_next()) {
1.182 paf 272: for(Array_iterator<const String*> c(*i.next()); c.has_next(); ) {
273: sdata.append(*c.next(), String::L_TABLE);
1.98 parser 274: if(c.has_next())
1.182 paf 275: sdata.append_know_length("\t", 1, String::L_CLEAN);
1.31 paf 276: }
1.182 paf 277: sdata.append_know_length("\n", 1, String::L_CLEAN);
1.31 paf 278: }
279:
280: // write
1.141 paf 281: file_write(r.absolute(vfile_name.as_string()),
1.182 paf 282: sdata.cstr(), sdata.length(), true, do_append);
1.22 paf 283: }
284:
1.182 paf 285: static void _count(Request& r, MethodParams&) {
286: int result=GET_SELF(r, VTable).table().count();
287: r.write_no_lang(*new VInt(result));
1.6 paf 288: }
289:
1.182 paf 290: static void _line(Request& r, MethodParams&) {
291: int result=1+GET_SELF(r, VTable).table().current();
292: r.write_no_lang(*new VInt(result));
1.6 paf 293: }
294:
1.182 paf 295: static void _offset(Request& r, MethodParams& params) {
296: Table& table=GET_SELF(r, VTable).table();
297: if(params.count()) {
1.133 paf 298: bool absolute=false;
1.182 paf 299: if(params.count()>1) {
300: const String& whence=params.as_string(0, "whence must be string");
1.133 paf 301: if(whence=="cur")
1.134 paf 302: absolute=false;
1.133 paf 303: else if(whence=="set")
1.134 paf 304: absolute=true;
1.133 paf 305: else
1.146 paf 306: throw Exception("parser.runtime",
1.134 paf 307: &whence,
308: "is invalid whence, valid are 'cur' or 'set'");
1.157 paf 309: }
1.133 paf 310:
1.182 paf 311: Value& offset_expr=params.as_junction(params.count()-1, "offset must be expression");
1.147 paf 312: table.offset(absolute, r.process_to_value(offset_expr).as_int());
1.151 paf 313: } else
1.182 paf 314: r.write_no_lang(*new VInt(table.current()));
1.6 paf 315: }
316:
1.182 paf 317: static void _menu(Request& r, MethodParams& params) {
318: Value& body_code=params.as_junction(0, "body must be code");
1.7 paf 319:
1.182 paf 320: Value* delim_maybe_code=params.count()>1?¶ms[1]:0;
1.7 paf 321:
1.182 paf 322: Table& table=GET_SELF(r, VTable).table();
1.7 paf 323: bool need_delim=false;
1.99 parser 324: int saved_current=table.current();
1.182 paf 325: int size=table.count();
1.99 parser 326: for(int row=0; row<size; row++) {
1.22 paf 327: table.set_current(row);
1.7 paf 328:
1.161 paf 329: StringOrValue sv_processed=r.process(body_code);
1.182 paf 330: const String* s_processed=sv_processed.get_string();
331: if(delim_maybe_code && s_processed && s_processed->length()) { // delimiter set and we have body
1.161 paf 332: if(need_delim) // need delim & iteration produced string?
1.150 paf 333: r.write_pass_lang(r.process(*delim_maybe_code));
1.7 paf 334: need_delim=true;
335: }
1.161 paf 336: r.write_pass_lang(sv_processed);
1.7 paf 337: }
1.99 parser 338: table.set_current(saved_current);
1.7 paf 339: }
340:
1.110 parser 341: #ifndef DOXYGEN
1.174 paf 342: enum Table2hash_distint { D_ILLEGAL, D_FIRST, D_TABLES };
1.74 paf 343: struct Row_info {
1.166 paf 344: Request *r;
1.74 paf 345: Table *table;
1.182 paf 346: Value* key_code;
347: size_t key_field;
348: Array<int>* value_fields;
349: HashStringValue* hash;
1.174 paf 350: Table2hash_distint distinct;
1.182 paf 351: size_t row;
1.74 paf 352: };
1.110 parser 353: #endif
1.182 paf 354: static void table_row_to_hash(Table::element_type row, Row_info *info) {
355: const String* key;
356: if(info->key_code) {
357: info->table->set_current(info->row++); // change context row
358: StringOrValue sv_processed=info->r->process(*info->key_code);
1.166 paf 359: key=&sv_processed.as_string();
360: } else
1.182 paf 361: key=info->key_field<row->count()?row->get(info->key_field):0;
1.166 paf 362:
363: if(!key)
364: return; // ignore rows without key [too-short-record_array if-indexed]
1.74 paf 365:
1.182 paf 366: switch(info->distinct) {
1.174 paf 367: case D_ILLEGAL: case D_FIRST:
368: {
1.182 paf 369: VHash* vhash=new VHash;
370: HashStringValue& hash=vhash->hash();
371: for(Array_iterator<int> i(*info->value_fields); i.has_next(); ) {
372: size_t value_field=i.next();
373: if(value_field<row->count())
1.174 paf 374: hash.put(
1.182 paf 375: *info->table->columns()->get(value_field),
376: new VString(*row->get(value_field)));
1.174 paf 377: }
378:
1.182 paf 379: if(info->hash->put_dont_replace(*key, vhash)) // put. existed?
380: if(info->distinct==D_ILLEGAL)
1.174 paf 381: throw Exception("parser.runtime",
382: key,
383: "duplicate key");
384: }
385: break;
386: case D_TABLES:
387: {
1.182 paf 388: VTable* vtable=(VTable*)info->hash->get(*key); // put. table existed?
1.174 paf 389: Table* table;
390: if(vtable)
391: table=vtable->get_table();
392: else {
393: // no? creating table of same structure as source
1.179 paf 394: Table::Action_options table_options(0, 0);
1.182 paf 395: table=new Table(*info->table, table_options/*no rows, just structure*/);
396: info->hash->put(*key, new VTable(table));
1.174 paf 397: }
1.182 paf 398: *table+=row;
1.174 paf 399: }
400: break;
401: default:
402: throw Exception(0,
403: 0,
1.182 paf 404: "invalid distinct code (#%d)", info->distinct);
1.74 paf 405: }
406: }
1.182 paf 407: static void _hash(Request& r, MethodParams& params) {
408: Table& self_table=GET_SELF(r, VTable).table();
409: VHash& result=*new VHash;
410: if(Table::columns_type columns=self_table.columns())
411: if(columns->count()>0) {
1.174 paf 412: Table2hash_distint distinct=D_ILLEGAL;
1.182 paf 413: int param_index=params.count()-1;
1.166 paf 414: if(param_index>0) {
1.182 paf 415: if(HashStringValue* options=
416: params.as_no_junction(param_index, "param must not be code").get_hash()) {
1.166 paf 417: --param_index;
418: int valid_options=0;
1.182 paf 419: if(Value* vdistinct_code=options->get(sql_distinct_name)) {
1.166 paf 420: valid_options++;
1.174 paf 421: Value& vdistinct_value=r.process_to_value(*vdistinct_code);
422: if(vdistinct_value.is_string()) {
423: const String& sdistinct=*vdistinct_value.get_string();
424: if(sdistinct=="tables")
425: distinct=D_TABLES;
426: else
427: throw Exception("parser.runtime",
428: &sdistinct,
429: "must be 'tables' or true/false");
430: } else
431: distinct=vdistinct_value.as_bool()?D_FIRST:D_ILLEGAL;
1.166 paf 432: }
1.182 paf 433: if(valid_options!=options->count())
1.166 paf 434: throw Exception("parser.runtime",
1.182 paf 435: 0,
1.166 paf 436: "called with invalid option");
1.163 paf 437: }
438: }
439: if(param_index==2) // bad options param type
440: throw Exception("parser.runtime",
1.182 paf 441: 0,
1.163 paf 442: "options must be hash");
443:
1.182 paf 444: Array<int> value_fields;
1.163 paf 445: if(param_index>0) {
1.174 paf 446: if(distinct!=D_ILLEGAL && distinct!=D_FIRST)
447: throw Exception("parser.runtime",
448: 0,
449: "in distinct[tables] mode you may not specify value field(s)");
1.182 paf 450: Value& value_fields_param=params.as_no_junction(param_index, "value field(s) must not be code");
1.123 parser 451: if(value_fields_param.is_string()) {
1.182 paf 452: value_fields+=self_table.column_name2index(
453: *value_fields_param.get_string(), true);
454: } else if(Table* value_fields_table=value_fields_param.get_table()) {
455: for(Array_iterator<Table::element_type> i(*value_fields_table);
456: i.has_next(); ) {
457: const String& value_field_name
458: =*i.next()->get(0);
459: value_fields
460: +=self_table.column_name2index(value_field_name, true);
1.123 parser 461: }
462: } else
1.146 paf 463: throw Exception("parser.runtime",
1.182 paf 464: 0,
1.123 parser 465: "value field(s) must be string or self_table"
466: );
467: } else { // by all columns, including key
1.174 paf 468: if(!(distinct!=D_ILLEGAL && distinct!=D_FIRST))
1.182 paf 469: for(size_t i=0; i<columns->count(); i++)
1.174 paf 470: value_fields+=i;
1.74 paf 471: }
472:
1.182 paf 473:
474: {
475: Row_info info={0};
476: info.r=&r;
477: info.table=&self_table;
478: Value* key_param=¶ms[0];
479: info.key_code=key_param->get_junction()?key_param:0;
480: info.key_field=info.key_code?-1
481: :self_table.column_name2index(key_param->as_string(), true);
482: info.value_fields=&value_fields;
483: info.hash=&result.hash();
484: info.distinct=distinct;
485: info.row=0;
486:
487: int saved_current=self_table.current();
488: self_table.for_each(table_row_to_hash, &info);
489: self_table.set_current(saved_current);
490: }
1.74 paf 491: }
1.97 parser 492: r.write_no_lang(result);
1.74 paf 493: }
494:
1.110 parser 495: #ifndef DOXYGEN
1.78 paf 496: struct Table_seq_item {
1.182 paf 497: ArrayString* row;
1.34 paf 498: union {
1.182 paf 499: const char *c_str;
1.34 paf 500: double d;
501: } value;
1.32 paf 502: };
1.110 parser 503: #endif
1.34 paf 504: static int sort_cmp_string(const void *a, const void *b) {
505: return strcmp(
1.78 paf 506: static_cast<const Table_seq_item *>(a)->value.c_str,
507: static_cast<const Table_seq_item *>(b)->value.c_str
1.34 paf 508: );
509: }
510: static int sort_cmp_double(const void *a, const void *b) {
1.78 paf 511: double va=static_cast<const Table_seq_item *>(a)->value.d;
512: double vb=static_cast<const Table_seq_item *>(b)->value.d;
1.34 paf 513: if(va<vb)
514: return -1;
515: else if(va>vb)
516: return +1;
517: else
518: return 0;
519: }
1.182 paf 520: static void _sort(Request& r, MethodParams& params) {
521: Value& key_maker=params.as_junction(0, "key-maker must be code");
1.61 paf 522:
1.182 paf 523: bool reverse=params.count()>1/*..[desc|asc|]*/?
524: reverse=params.as_no_junction(1, "order must not be code").as_string()=="desc":
1.104 parser 525: false; // default=asc
1.32 paf 526:
1.182 paf 527: Table& old_table=GET_SELF(r, VTable).table();
528: Table& new_table=*new Table(old_table.columns());
1.34 paf 529:
1.182 paf 530: Table_seq_item* seq=new(PointerFreeGC) Table_seq_item[old_table.count()];
1.34 paf 531: int i;
532:
533: // calculate key values
534: bool key_values_are_strings=true;
1.182 paf 535: int old_count=old_table.count();
536: for(i=0; i<old_count; i++) {
1.101 parser 537: old_table.set_current(i);
1.32 paf 538: // calculate key value
1.182 paf 539: seq[i].row=old_table[i];
540: Value& value=r.process_to_value(key_maker).as_expr_result(true/*return string as-is*/);
1.34 paf 541: if(i==0) // determining key values type by first one
542: key_values_are_strings=value.is_string();
543:
544: if(key_values_are_strings)
545: seq[i].value.c_str=value.as_string().cstr();
546: else
547: seq[i].value.d=value.as_double();
1.32 paf 548: }
549: // sort keys
1.182 paf 550: _qsort(seq, old_count, sizeof(Table_seq_item),
1.34 paf 551: key_values_are_strings?sort_cmp_string:sort_cmp_double);
1.32 paf 552:
1.34 paf 553: // reorder table as they require in 'seq'
1.182 paf 554: for(i=0; i<old_count; i++)
555: new_table+=Table::element_type(seq[reverse?old_count-1-i:i].row);
556:
557: delete[] seq;
1.32 paf 558:
1.116 parser 559: // replace any previous table value
1.182 paf 560: GET_SELF(r, VTable).set_table(new_table);
1.32 paf 561: }
562:
1.176 paf 563: #ifndef DOXYGEN
1.182 paf 564: struct Expression_is_true_info {
1.176 paf 565: Request* r;
566: Value* expression_code;
567: };
568: #endif
1.182 paf 569: static bool expression_is_true(Table& self, void* ainfo) {
570: Expression_is_true_info& info=*static_cast<Expression_is_true_info*>(ainfo);
1.176 paf 571: return info.r->process_to_value(*info.expression_code).as_bool();
572: }
573: static bool _locate_expression(Table& table, Table::Action_options o,
1.182 paf 574: Request& r, MethodParams& params) {
575: check_option_param(o.defined, params, 1,
1.176 paf 576: "locate by expression only has parameters: expression and, maybe, options");
1.182 paf 577: Value& expression_code=params.as_junction(0, "must be expression");
1.145 paf 578:
1.182 paf 579: Expression_is_true_info info={&r, &expression_code};
580: return table.table_first_that(expression_is_true, &info, o);
1.145 paf 581: }
1.176 paf 582: static bool _locate_name_value(Table& table, Table::Action_options o,
1.182 paf 583: Request& r, MethodParams& params) {
584: check_option_param(o.defined, params, 2,
1.176 paf 585: "locate by locate by name has parameters: name, value and, maybe, options");
1.182 paf 586: const String& name=params.as_string(0, "column name must be string");
587: const String& value=params.as_string(1, "value must be string");
588: return table.locate(name, value, o);
589: }
590: static void _locate(Request& r, MethodParams& params) {
591: Table& table=GET_SELF(r, VTable).table();
1.72 paf 592:
1.182 paf 593: Table::Action_options o=get_action_options(r, params, table);
594:
595: bool result=params[0].get_junction()?
596: _locate_expression(table, o, r, params) :
597: _locate_name_value(table, o, r, params);
598: r.write_no_lang(*new VBool(result));
1.145 paf 599: }
1.182 paf 600:
601:
602: static void _flip(Request& r, MethodParams& params) {
603: Table& old_table=GET_SELF(r, VTable).table();
604: Table& new_table=*new Table(old_table.columns());
605: if(size_t old_count=old_table.count())
606: if(size_t old_cols=old_table[0]->count())
607: for(size_t column=0; column<old_cols; column++) {
608: Table::element_type new_row(new ArrayString(old_count));
609: for(size_t i=0; i<old_count; i++) {
610: Table::element_type old_row=old_table[i];
611: *new_row+=column<old_row->count()?old_row->get(column):new String;
1.39 paf 612: }
1.182 paf 613: new_table+=new_row;
1.39 paf 614: }
615:
1.182 paf 616: r.write_no_lang(*new VTable(&new_table));
1.39 paf 617: }
618:
1.182 paf 619: static void _append(Request& r, MethodParams& params) {
1.134 paf 620: // data
1.182 paf 621: Temp_lang temp_lang(r, String::L_PASS_APPENDED);
622: const String& string=r.process_to_string(params.as_junction(0, "body must be code"));
1.41 paf 623:
624: // parse cells
1.182 paf 625: Table::element_type row=new ArrayString;
626: size_t pos_after=0;
627: string.split(*row, pos_after, "\t", String::L_AS_IS);
1.41 paf 628:
1.182 paf 629: GET_SELF(r, VTable).table()+=row;
1.41 paf 630: }
631:
1.182 paf 632: static void join_named_row(Table& src, Table* dest) {
633: Table::columns_type dest_columns=dest->columns();
634: size_t dest_columns_count=dest_columns->count();
635: Table::element_type dest_row(new ArrayString(dest_columns_count));
636: for(size_t dest_column=0; dest_column<dest_columns_count; dest_column++) {
637: const String* src_item=src.item(*dest_columns->get(dest_column));
638: *dest_row+=src_item?src_item:new String;
639: }
640: *dest+=dest_row;
641: }
642: static void join_nameless_row(Table& src, Table* dest) {
643: *dest+=src[src.current()];
644: }
645: static void _join(Request& r, MethodParams& params) {
646: Table* maybe_src=params.as_no_junction(0, "table ref must not be code").get_table();
1.42 paf 647: if(!maybe_src)
1.146 paf 648: throw Exception("parser.runtime",
1.182 paf 649: 0,
1.42 paf 650: "source is not a table");
1.176 paf 651: Table& src=*maybe_src;
652:
1.182 paf 653: Table::Action_options o=get_action_options(r, params, src);
654: check_option_param(o.defined, params, 1,
1.176 paf 655: "invalid extra parameter");
1.42 paf 656:
1.182 paf 657: Table& dest=GET_SELF(r, VTable).table();
1.42 paf 658: if(&src == &dest)
1.146 paf 659: throw Exception("parser.runtime",
1.182 paf 660: 0,
1.42 paf 661: "source and destination are same table");
662:
1.182 paf 663: if(Table::columns_type dest_columns=dest.columns()) // dest is named
664: src.table_for_each(join_named_row, &dest, o);
665: else // dest is nameless
666: src.table_for_each(join_nameless_row, &dest, o);
1.42 paf 667: }
668:
1.94 parser 669: #ifndef DOXYGEN
1.169 paf 670: class Table_sql_event_handlers: public SQL_Driver_query_event_handlers {
1.182 paf 671: ArrayString& columns;
672: ArrayString* row;
1.94 parser 673: public:
1.182 paf 674: Table* table;
675: public:
676: Table_sql_event_handlers() :
677: columns(*new ArrayString), row(0), table(0) {
1.94 parser 678: }
679:
1.182 paf 680: bool add_column(SQL_Error& error, const char *str, size_t length) {
1.170 paf 681: try {
1.182 paf 682: columns+=new String(str, length, true);
1.170 paf 683: return false;
684: } catch(...) {
685: error=SQL_Error("exception occured in Table_sql_event_handlers::add_column");
686: return true;
687: }
688: }
689: bool before_rows(SQL_Error& error) {
690: try {
1.182 paf 691: table=new Table(&columns);
1.170 paf 692: return false;
693: } catch(...) {
694: error=SQL_Error("exception occured in Table_sql_event_handlers::before_rows");
695: return true;
696: }
697: }
698: bool add_row(SQL_Error& error) {
699: try {
1.182 paf 700: *table+=row=new ArrayString;
1.170 paf 701: return false;
702: } catch(...) {
703: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row");
704: return true;
705: }
706: }
1.182 paf 707: bool add_row_cell(SQL_Error& error, const char* str, size_t length) {
1.170 paf 708: try {
1.182 paf 709: String& cell=*new String;
710: if(length)
711: cell.append_know_length(str, length, String::L_TAINTED);
712: *row+=&cell;
1.170 paf 713: return false;
714: } catch(...) {
715: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row_cell");
716: return true;
717: }
1.94 parser 718: }
719: };
720: #endif
1.182 paf 721: static void _sql(Request& r, MethodParams& params) {
722: Value& statement=params.as_junction(0, "statement must be code");
1.49 paf 723:
1.53 paf 724: ulong limit=0;
1.100 parser 725: ulong offset=0;
1.182 paf 726: if(params.count()>1) {
727: Value& voptions=params.as_no_junction(1, "options must be hash, not code");
1.156 paf 728: if(!voptions.is_string())
1.182 paf 729: if(HashStringValue* options=voptions.get_hash()) {
1.164 paf 730: int valid_options=0;
1.182 paf 731: if(Value* vlimit=options->get(sql_limit_name)) {
1.164 paf 732: valid_options++;
1.147 paf 733: limit=(ulong)r.process_to_value(*vlimit).as_double();
1.164 paf 734: }
1.182 paf 735: if(Value* voffset=options->get(sql_offset_name)) {
1.164 paf 736: valid_options++;
1.147 paf 737: offset=(ulong)r.process_to_value(*voffset).as_double();
1.164 paf 738: }
1.182 paf 739: if(valid_options!=options->count())
1.164 paf 740: throw Exception("parser.runtime",
1.182 paf 741: 0,
1.164 paf 742: "called with invalid option");
1.109 parser 743: } else
1.146 paf 744: throw Exception("parser.runtime",
1.182 paf 745: 0,
1.109 parser 746: "options must be hash");
1.49 paf 747: }
748:
1.182 paf 749: Temp_lang temp_lang(r, String::L_SQL);
750: const String& statement_string=r.process_to_string(statement);
751: const char* statement_cstr=
752: statement_string.cstr(String::L_UNSPECIFIED, r.connection());
753: Table_sql_event_handlers handlers;
1.135 paf 754: #ifdef RESOURCES_DEBUG
755: struct timeval mt[2];
756: //measure:before
757: gettimeofday(&mt[0],NULL);
758: #endif
1.182 paf 759: r.connection()->query(
1.160 paf 760: statement_cstr, offset, limit,
761: handlers,
762: statement_string);
1.135 paf 763:
764: #ifdef RESOURCES_DEBUG
765: //measure:after connect
766: gettimeofday(&mt[1],NULL);
767:
768: double t[2];
769: for(int i=0;i<2;i++)
770: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
771:
772: r.sql_request_time+=t[1]-t[0];
773: #endif
1.96 parser 774:
1.182 paf 775: Table& result=
776: handlers.table?*handlers.table: // query resulted in table? return it
777: *new Table(Table::columns_type(0)); // query returned no table, fake it
1.49 paf 778:
779: // replace any previous table value
1.182 paf 780: GET_SELF(r, VTable).set_table(result);
1.49 paf 781: }
782:
1.182 paf 783: static void _columns(Request& r, MethodParams&) {
1.88 parser 784:
1.182 paf 785: Table::columns_type result_columns(new ArrayString);
786: *result_columns+=new String("column");
787: Table& result_table=*new Table(result_columns);
1.88 parser 788:
1.182 paf 789: Table& source_table=GET_SELF(r, VTable).table();
790: if(Table::columns_type source_columns=source_table.columns()) {
791: for(Array_iterator<const String*> i(*source_columns); i.has_next(); ) {
792: Table::element_type result_row(new ArrayString);
793: *result_row+=i.next();
794: result_table+=result_row;
1.88 parser 795: }
796: }
797:
1.182 paf 798: r.write_no_lang(*new VTable(&result_table));
1.88 parser 799: }
800:
1.182 paf 801: static void _select(Request& r, MethodParams& params) {
802: Value& vcondition=params.as_junction(0, "condition must be expression");
1.148 paf 803:
1.182 paf 804: Table& source_table=GET_SELF(r, VTable).table();
805: Table& result_table=*new Table(source_table.columns());
1.148 paf 806:
807: int saved_current=source_table.current();
1.182 paf 808: int size=source_table.count();
1.148 paf 809: for(int row=0; row<size; row++) {
810: source_table.set_current(row);
811:
1.150 paf 812: bool condition=r.process_to_value(vcondition,
1.149 paf 813: /*0/*no name* /,*/
1.148 paf 814: false/*don't intercept string*/).as_bool();
815:
816: if(condition) // ...condition is true=
1.182 paf 817: result_table+=source_table[row]; // =green light to go to result
1.148 paf 818: }
819: source_table.set_current(saved_current);
820:
1.182 paf 821: r.write_no_lang(*new VTable(&result_table));
1.148 paf 822: }
823:
1.66 paf 824: // constructor
825:
1.182 paf 826: MTable::MTable(): Methoded("table") {
1.142 paf 827: // ^table::create{data}
828: // ^table::create[nameless]{data}
829: // ^table::create[table]
830: add_native_method("create", Method::CT_DYNAMIC, _create, 1, 2);
831: // old name for compatibility with <= v 1.141 2002/01/25 11:33:45 paf
832: add_native_method("set", Method::CT_DYNAMIC, _create, 1, 2);
1.2 paf 833:
1.142 paf 834: // ^table::load[file]
835: // ^table::load[nameless;file]
1.168 paf 836: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 3);
1.22 paf 837:
838: // ^table.save[file]
839: // ^table.save[nameless;file]
1.66 paf 840: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 2);
1.6 paf 841:
842: // ^table.count[]
1.66 paf 843: add_native_method("count", Method::CT_DYNAMIC, _count, 0, 0);
1.6 paf 844:
845: // ^table.line[]
1.66 paf 846: add_native_method("line", Method::CT_DYNAMIC, _line, 0, 0);
1.6 paf 847:
1.10 paf 848: // ^table.offset[]
1.133 paf 849: // ^table.offset(offset)
850: // ^table.offset[cur|set](offset)
851: add_native_method("offset", Method::CT_DYNAMIC, _offset, 0, 2);
1.7 paf 852:
1.10 paf 853: // ^table.menu{code}
854: // ^table.menu{code}[delim]
1.66 paf 855: add_native_method("menu", Method::CT_DYNAMIC, _menu, 1, 2);
1.74 paf 856:
1.79 paf 857: // ^table:hash[key field name]
1.123 parser 858: // ^table:hash[key field name][value field name(s) string/table]
1.163 paf 859: add_native_method("hash", Method::CT_DYNAMIC, _hash, 1, 3);
1.32 paf 860:
1.102 parser 861: // ^table.sort{string-key-maker} ^table.sort{string-key-maker}[desc|asc]
862: // ^table.sort(numeric-key-maker) ^table.sort(numeric-key-maker)[desc|asc]
1.66 paf 863: add_native_method("sort", Method::CT_DYNAMIC, _sort, 1, 2);
1.8 paf 864:
1.36 paf 865: // ^table.locate[field;value]
1.176 paf 866: add_native_method("locate", Method::CT_DYNAMIC, _locate, 1, 3);
1.39 paf 867:
868: // ^table.flip[]
1.66 paf 869: add_native_method("flip", Method::CT_DYNAMIC, _flip, 0, 0);
1.41 paf 870:
871: // ^table.append{r{tab}e{tab}c{tab}o{tab}r{tab}d}
1.66 paf 872: add_native_method("append", Method::CT_DYNAMIC, _append, 1, 1);
1.42 paf 873:
1.157 paf 874: // ^table.join[table][$.limit(10) $.offset(1) $.offset[cur] ]
875: add_native_method("join", Method::CT_DYNAMIC, _join, 1, 2);
1.49 paf 876:
877:
1.100 parser 878: // ^table:sql[query]
879: // ^table:sql[query][$.limit(1) $.offset(2)]
880: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.88 parser 881:
882: // ^table:columns[]
883: add_native_method("columns", Method::CT_DYNAMIC, _columns, 0, 0);
1.148 paf 884:
885: // ^table.select(expression) = table
886: add_native_method("select", Method::CT_DYNAMIC, _select, 1, 1);
1.40 paf 887: }
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