Annotation of parser3/src/classes/table.C, revision 1.173
1.20 paf 1: /** @file
1.47 paf 2: Parser: @b table parser class.
1.20 paf 3:
1.172 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:
1.173 ! paf 8: static const char* IDENT_TABLE_C="$Date: 2003/01/21 15:51:07 $";
1.1 paf 9:
1.105 parser 10: #include "classes.h"
1.16 paf 11: #include "pa_common.h"
1.1 paf 12: #include "pa_request.h"
13: #include "pa_vtable.h"
1.6 paf 14: #include "pa_vint.h"
1.51 paf 15: #include "pa_sql_connection.h"
1.72 paf 16: #include "pa_vbool.h"
1.1 paf 17:
1.66 paf 18: // class
19:
20: class MTable : public Methoded {
21: public: // VStateless_class
22: Value *create_new_value(Pool& pool) { return new(pool) VTable(pool); }
23:
24: public:
25: MTable(Pool& pool);
1.70 paf 26:
27: public: // Methoded
1.66 paf 28: bool used_directly() { return true; }
29: };
1.1 paf 30:
31: // methods
1.66 paf 32:
1.157 paf 33: static void get_copy_options(Request& r, const String& method_name, MethodParams *params, int param_index,
34: const Table& source,
35: int& offset,
36: int& limit) {
37: offset=0;
38: limit=0;
39: if(params->size()<=param_index)
40: return;
41:
42: Value& voptions=params->as_no_junction(param_index, "options must be hash, not code");
1.158 paf 43: if(!voptions.is_string()) {
1.157 paf 44: if(Hash *options=voptions.get_hash(&method_name)) {
1.164 paf 45: int valid_options=0;
46: if(Value *voffset=(Value *)options->get(*sql_offset_name)) {
47: valid_options++;
1.157 paf 48: if(voffset->is_string()) {
49: const String& soffset=*voffset->get_string();
50: if(soffset == "cur")
51: offset=source.current();
52: else
53: throw Exception("parser.runtime",
54: &soffset,
55: "must be 'cur' string or expression");
56: } else
57: offset=r.process_to_value(*voffset).as_int();
1.164 paf 58: }
59: if(Value *vlimit=(Value *)options->get(*sql_limit_name)) {
60: valid_options++;
1.157 paf 61: limit=r.process_to_value(*vlimit).as_int();
1.164 paf 62: }
63: if(valid_options!=options->size())
64: throw Exception("parser.runtime",
65: &method_name,
66: "called with invalid option");
1.157 paf 67: } else
68: throw Exception("parser.runtime",
69: &method_name,
70: "options must be hash");
1.158 paf 71: }
72: if(!limit) // zero limit = sould be 'nothing to copy', for methods zero means 'all'
73: limit=-1; // thus fixing
1.157 paf 74: }
75:
1.142 paf 76: static void _create(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 77: Pool& pool=r.pool();
1.157 paf 78: // clone/copy part?
79: if(const Table *source=params->get(0).get_table()) {
80: int offset, limit;
81: get_copy_options(r, method_name, params, 1, *source,
82: offset, limit);
1.165 paf 83: static_cast<VTable *>(r.get_self())->set_table(*new(pool) Table(pool, *source, offset, limit));
1.157 paf 84: return;
85: }
1.142 paf 86:
1.1 paf 87: // data is last parameter
1.45 paf 88: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.134 paf 89: const String& data=
1.147 paf 90: r.process_to_string(params->as_junction(params->size()-1, "body must be code"));
1.44 paf 91:
92: size_t pos_after=0;
93: // parse columns
94: Array *columns;
95: if(params->size()==2) {
96: columns=0;
1.21 paf 97: } else {
1.44 paf 98: columns=new(pool) Array(pool);
99:
100: Array head(pool);
1.137 paf 101: data.split(head, &pos_after, "\n", 1, String::UL_AS_IS, 1);
1.44 paf 102: if(head.size())
1.137 paf 103: head.get_string(0)->split(*columns, 0, "\t", 1, String::UL_AS_IS);
1.44 paf 104: }
105:
106: Table& table=*new(pool) Table(pool, &method_name, columns);
107: // parse cells
108: Array rows(pool);
1.137 paf 109: data.split(rows, &pos_after, "\n", 1, String::UL_AS_IS);
1.98 parser 110: Array_iter i(rows);
111: while(i.has_next()) {
1.44 paf 112: Array& row=*new(pool) Array(pool);
1.98 parser 113: const String& string=*i.next_string();
1.118 parser 114: // remove comment lines
115: if(!string.size())
1.44 paf 116: continue;
117:
1.137 paf 118: string.split(row, 0, "\t", 1, String::UL_AS_IS);
1.44 paf 119: table+=&row;
1.17 paf 120: }
1.1 paf 121:
1.44 paf 122: // replace any previous table value
1.165 paf 123: static_cast<VTable *>(r.get_self())->set_table(table);
1.44 paf 124: }
125:
1.61 paf 126: static void _load(Request& r, const String& method_name, MethodParams *params) {
1.44 paf 127: Pool& pool=r.pool();
1.168 paf 128: const String& first_param=params->as_string(0, "file name must be string");
129: int filename_param_index=0;
130: bool nameless=first_param=="nameless";
131: if(nameless)
132: filename_param_index++;
133: int options_param_index=filename_param_index+1;
134:
1.44 paf 135: // loading text
1.168 paf 136: char *data=file_read_text(pool,
137: r.absolute(params->as_string(filename_param_index, "file name must be string")),
138: true,
139: options_param_index<params->size()?params->as_no_junction(options_param_index, "additional params must be hash").get_hash(&method_name):0
140: );
1.44 paf 141:
1.1 paf 142: // parse columns
143: Array *columns;
144: #ifndef NO_STRING_ORIGIN
145: const Origin& origin=method_name.origin();
1.2 paf 146: const char *file=origin.file;
1.1 paf 147: uint line=origin.line;
148: #endif
1.168 paf 149: if(nameless) {
1.139 paf 150: columns=0; // nameless
1.1 paf 151: } else {
152: columns=new(pool) Array(pool);
153:
1.139 paf 154: while(char *row_chars=getrow(&data)) {
155: // remove empty&comment lines
156: if(!*row_chars || *row_chars == '#')
157: continue;
1.1 paf 158: do {
159: String *name=new(pool) String(pool);
1.45 paf 160: name->APPEND_TAINTED(lsplit(&row_chars, '\t'), 0, file, line++);
1.1 paf 161: *columns+=name;
162: } while(row_chars);
1.139 paf 163:
164: break;
165: }
1.1 paf 166: }
167:
168: // parse cells
1.27 paf 169: Table& table=*new(pool) Table(pool, &method_name, columns);
1.1 paf 170: char *row_chars;
171: while(row_chars=getrow(&data)) {
1.118 parser 172: // remove empty&comment lines
173: if(!*row_chars || *row_chars == '#')
1.28 paf 174: continue;
1.1 paf 175: Array *row=new(pool) Array(pool);
176: while(char *cell_chars=lsplit(&row_chars, '\t')) {
177: String *cell=new(pool) String(pool);
1.44 paf 178: cell->APPEND_TAINTED(cell_chars, 0, file, line);
1.1 paf 179: *row+=cell;
180: }
1.107 parser 181: #ifndef NO_STRING_ORIGIN
1.1 paf 182: line++;
1.107 parser 183: #endif
1.1 paf 184: table+=row;
185: };
186:
187: // replace any previous table value
1.165 paf 188: static_cast<VTable *>(r.get_self())->set_table(table);
1.1 paf 189: }
1.2 paf 190:
1.146 paf 191: /// @todo "x\nx" "xxx""xx"
1.61 paf 192: static void _save(Request& r, const String& method_name, MethodParams *params) {
1.22 paf 193: Pool& pool=r.pool();
1.125 parser 194: Value& vfile_name=params->as_no_junction(params->size()-1,
1.61 paf 195: "file name must not be code");
1.22 paf 196:
1.165 paf 197: Table& table=static_cast<VTable *>(r.get_self())->table(&method_name);
1.31 paf 198:
1.129 paf 199: bool do_append=false;
1.31 paf 200: String sdata(pool);
1.129 paf 201: if(params->size()==1) { // named output
1.31 paf 202: // write out names line
203: if(table.columns()) { // named table
1.98 parser 204: Array_iter i(*table.columns());
205: while(i.has_next()) {
206: sdata.append(*i.next_string(), //*static_cast<String *>(table.columns()->quick_get(column)),
207: String::UL_TABLE);
208: if(i.has_next())
1.31 paf 209: sdata.APPEND_CONST("\t");
210: }
211: } else { // nameless table
1.98 parser 212: if(int lsize=table.size()?static_cast<Array *>(table.get(0))->size():0)
1.31 paf 213: for(int column=0; column<lsize; column++) {
1.106 parser 214: char *cindex_tab=(char *)pool.malloc(MAX_NUMBER);
1.31 paf 215: snprintf(cindex_tab, MAX_NUMBER, "%d\t", column);
216: sdata.APPEND_CONST(cindex_tab);
217: }
218: else
219: sdata.APPEND_CONST("empty nameless table");
220: }
221: sdata.APPEND_CONST("\n");
1.129 paf 222: } else { // mode specified
223: const String& mode=params->as_string(0, "mode must be string");
224: if(mode=="append")
225: do_append=true;
226: else if(mode=="nameless")
227: /*ok, already skipped names output*/;
228: else
1.146 paf 229: throw Exception("parser.runtime",
1.129 paf 230: &mode,
231: "unknown mode, must be 'append'");
232:
1.31 paf 233: }
234: // data lines
1.98 parser 235: Array_iter i(table);
236: while(i.has_next()) {
237: Array_iter c(*static_cast<Array *>(i.next()));
238: while(c.has_next()) {
1.153 paf 239: if(const String *s=c.next_string())
240: sdata.append(*s,
241: String::UL_TABLE);
1.98 parser 242: if(c.has_next())
1.31 paf 243: sdata.APPEND_CONST("\t");
244: }
245: sdata.APPEND_CONST("\n");
246: }
247:
248: // write
1.141 paf 249: file_write(r.absolute(vfile_name.as_string()),
1.129 paf 250: sdata.cstr(), sdata.size(), true, do_append);
1.22 paf 251: }
252:
1.93 parser 253: static void _count(Request& r, const String& method_name, MethodParams *) {
1.6 paf 254: Pool& pool=r.pool();
1.165 paf 255: int result=static_cast<VTable *>(r.get_self())->table(&method_name).size();
1.151 paf 256: r.write_no_lang(*new(pool) VInt(pool, result));
1.6 paf 257: }
258:
1.61 paf 259: static void _line(Request& r, const String& method_name, MethodParams *) {
1.6 paf 260: Pool& pool=r.pool();
1.165 paf 261: int result=1+static_cast<VTable *>(r.get_self())->table(&method_name).current();
1.151 paf 262: r.write_no_lang(*new(pool) VInt(pool, result));
1.6 paf 263: }
264:
1.61 paf 265: static void _offset(Request& r, const String& method_name, MethodParams *params) {
1.6 paf 266: Pool& pool=r.pool();
1.165 paf 267: Table& table=static_cast<VTable *>(r.get_self())->table(&method_name);
1.74 paf 268: if(params->size()) {
1.133 paf 269: bool absolute=false;
270: if(params->size()>1) {
271: const String& whence=params->as_string(0, "whence must be string");
272: if(whence=="cur")
1.134 paf 273: absolute=false;
1.133 paf 274: else if(whence=="set")
1.134 paf 275: absolute=true;
1.133 paf 276: else
1.146 paf 277: throw Exception("parser.runtime",
1.134 paf 278: &whence,
279: "is invalid whence, valid are 'cur' or 'set'");
1.157 paf 280: }
1.133 paf 281:
282: Value& offset_expr=params->as_junction(params->size()-1, "offset must be expression");
1.147 paf 283: table.offset(absolute, r.process_to_value(offset_expr).as_int());
1.151 paf 284: } else
285: r.write_no_lang(*new(pool) VInt(pool, table.current()));
1.6 paf 286: }
287:
1.61 paf 288: static void _menu(Request& r, const String& method_name, MethodParams *params) {
1.90 parser 289: Value& body_code=params->as_junction(0, "body must be code");
1.7 paf 290:
1.122 parser 291: Value *delim_maybe_code=params->size()>1?¶ms->get(1):0;
1.7 paf 292:
1.165 paf 293: Table& table=static_cast<VTable *>(r.get_self())->table(&method_name);
1.7 paf 294: bool need_delim=false;
1.99 parser 295: int saved_current=table.current();
296: int size=table.size();
297: for(int row=0; row<size; row++) {
1.22 paf 298: table.set_current(row);
1.7 paf 299:
1.161 paf 300: StringOrValue sv_processed=r.process(body_code);
301: const String *s_processed=sv_processed.get_string();
302: if(delim_maybe_code && s_processed && s_processed->size()) { // delimiter set and we have body
303: if(need_delim) // need delim & iteration produced string?
1.150 paf 304: r.write_pass_lang(r.process(*delim_maybe_code));
1.7 paf 305: need_delim=true;
306: }
1.161 paf 307: r.write_pass_lang(sv_processed);
1.7 paf 308: }
1.99 parser 309: table.set_current(saved_current);
1.7 paf 310: }
311:
1.110 parser 312: #ifndef DOXYGEN
1.74 paf 313: struct Row_info {
1.166 paf 314: Request *r;
1.74 paf 315: Table *table;
1.166 paf 316: Value *key_code;
1.74 paf 317: int key_field;
318: Array *value_fields;
319: Hash *hash;
1.163 paf 320: bool distinct;
1.167 paf 321: int row;
1.74 paf 322: };
1.110 parser 323: #endif
1.74 paf 324: static void table_row_to_hash(Array::Item *value, void *info) {
325: Array& row=*static_cast<Array *>(value);
326: Row_info& ri=*static_cast<Row_info *>(info);
327: Pool& pool=ri.table->pool();
328:
1.166 paf 329: const String *key;
330: if(ri.key_code) {
1.167 paf 331: ri.table->set_current(ri.row++); // change context row
1.166 paf 332: StringOrValue sv_processed=ri.r->process(*ri.key_code);
333: key=&sv_processed.as_string();
334: } else
335: key=ri.key_field<row.size()?row.get_string(ri.key_field):0;
336:
337: if(!key)
338: return; // ignore rows without key [too-short-record_array if-indexed]
1.74 paf 339:
1.166 paf 340: VHash& result=*new(pool) VHash(pool);
341: Hash& hash=*result.get_hash(0);
342: for(int i=0; i<ri.value_fields->size(); i++) {
343: int value_field=ri.value_fields->get_int(i);
344: if(value_field<row.size())
345: hash.put(
346: *ri.table->columns()->get_string(value_field),
347: new(pool) VString(*row.get_string(value_field)));
1.74 paf 348: }
1.166 paf 349:
350: if(ri.hash->put_dont_replace(*key, &result)) // put. existed?
351: if(!ri.distinct)
352: throw Exception("parser.runtime",
353: key,
354: "duplicate key");
1.74 paf 355: }
356: static void _hash(Request& r, const String& method_name, MethodParams *params) {
1.97 parser 357: Pool& pool=r.pool();
1.165 paf 358: Table& self_table=static_cast<VTable *>(r.get_self())->table(&method_name);
1.97 parser 359: Value& result=*new(pool) VHash(pool);
1.152 paf 360: if(const Array *columns=self_table.columns())
361: if(columns->size()>0) {
1.163 paf 362: bool distinct=false;
363: int param_index=params->size()-1;
1.166 paf 364: if(param_index>0) {
365: if(Hash *options=
366: params->as_no_junction(param_index, "param must not be code").get_hash(0)) {
367: --param_index;
368: int valid_options=0;
369: if(Value *vdistinct=(Value *)options->get(*sql_distinct_name)) {
370: valid_options++;
371: distinct=r.process_to_value(*vdistinct).as_bool();
372: }
373: if(valid_options!=options->size())
374: throw Exception("parser.runtime",
375: &method_name,
376: "called with invalid option");
1.163 paf 377: }
378: }
379: if(param_index==2) // bad options param type
380: throw Exception("parser.runtime",
381: &method_name,
382: "options must be hash");
383:
1.123 parser 384: Array value_fields(pool);
1.163 paf 385: if(param_index>0) {
386: Value& value_fields_param=params->as_no_junction(param_index, "value field(s) must not be code");
1.123 parser 387: if(value_fields_param.is_string()) {
388: value_fields+=self_table.column_name2index(value_fields_param.as_string(), true);
389: } else if(Table *value_fields_table=value_fields_param.get_table()) {
390: for(int i=0; i<value_fields_table->size(); i++) {
391: const String& value_field_name=
392: *static_cast<Array *>(value_fields_table->get(i))->get_string(0);
393: value_fields+=self_table.column_name2index(value_field_name, true);
394: }
395: } else
1.146 paf 396: throw Exception("parser.runtime",
1.123 parser 397: &method_name,
398: "value field(s) must be string or self_table"
399: );
400: } else { // by all columns, including key
1.74 paf 401: for(int i=0; i<columns->size(); i++)
1.123 parser 402: value_fields+=i;
1.74 paf 403: }
404:
1.166 paf 405: Value& key_param=params->get(0);
406: Value *key_code=key_param.get_junction()?&key_param:0;
407: int key_field=key_code?-1
408: :self_table.column_name2index(key_param.as_string(), true);
409:
410: Row_info row_info={&r, &self_table, key_code, key_field, &value_fields, result.get_hash(0), distinct};
411:
412: int saved_current=self_table.current();
1.123 parser 413: self_table.for_each(table_row_to_hash, &row_info);
1.166 paf 414: self_table.set_current(saved_current);
1.74 paf 415: }
1.97 parser 416: r.write_no_lang(result);
1.74 paf 417: }
418:
1.110 parser 419: #ifndef DOXYGEN
1.78 paf 420: struct Table_seq_item {
1.34 paf 421: Array *row;
422: union {
423: char *c_str;
424: double d;
425: } value;
1.32 paf 426: };
1.110 parser 427: #endif
1.34 paf 428: static int sort_cmp_string(const void *a, const void *b) {
429: return strcmp(
1.78 paf 430: static_cast<const Table_seq_item *>(a)->value.c_str,
431: static_cast<const Table_seq_item *>(b)->value.c_str
1.34 paf 432: );
433: }
434: static int sort_cmp_double(const void *a, const void *b) {
1.78 paf 435: double va=static_cast<const Table_seq_item *>(a)->value.d;
436: double vb=static_cast<const Table_seq_item *>(b)->value.d;
1.34 paf 437: if(va<vb)
438: return -1;
439: else if(va>vb)
440: return +1;
441: else
442: return 0;
443: }
1.61 paf 444: static void _sort(Request& r, const String& method_name, MethodParams *params) {
1.101 parser 445: Pool& pool=r.pool();
1.90 parser 446: Value& key_maker=params->as_junction(0, "key-maker must be code");
1.61 paf 447:
1.122 parser 448: bool reverse=params->size()>1/*..[desc|asc|]*/?
1.103 parser 449: reverse=params->as_no_junction(1, "order must not be code").as_string()=="desc":
1.104 parser 450: false; // default=asc
1.32 paf 451:
1.165 paf 452: Table& old_table=static_cast<VTable *>(r.get_self())->table(&method_name);
1.173 ! paf 453: if(old_table.size()==0)
! 454: return;
! 455:
1.101 parser 456: Table& new_table=*new(pool) Table(pool, &method_name, old_table.columns());
1.34 paf 457:
1.101 parser 458: Table_seq_item *seq=(Table_seq_item *)pool.malloc(sizeof(Table_seq_item)*old_table.size());
1.34 paf 459: int i;
460:
461: // calculate key values
462: bool key_values_are_strings=true;
1.101 parser 463: for(i=0; i<old_table.size(); i++) {
464: old_table.set_current(i);
1.32 paf 465: // calculate key value
1.101 parser 466: seq[i].row=(MethodParams *)old_table.get(i);
1.147 paf 467: Value& value=*r.process_to_value(key_maker).as_expr_result(true/*return string as-is*/);
1.34 paf 468: if(i==0) // determining key values type by first one
469: key_values_are_strings=value.is_string();
470:
471: if(key_values_are_strings)
472: seq[i].value.c_str=value.as_string().cstr();
473: else
474: seq[i].value.d=value.as_double();
1.32 paf 475: }
476: // sort keys
1.101 parser 477: _qsort(seq, old_table.size(), sizeof(Table_seq_item),
1.34 paf 478: key_values_are_strings?sort_cmp_string:sort_cmp_double);
1.32 paf 479:
1.34 paf 480: // reorder table as they require in 'seq'
1.101 parser 481: for(i=0; i<old_table.size(); i++)
482: new_table+=seq[reverse?old_table.size()-1-i:i].row;
1.32 paf 483:
1.116 parser 484: // replace any previous table value
1.165 paf 485: static_cast<VTable *>(r.get_self())->set_table(new_table);
1.32 paf 486: }
487:
1.145 paf 488: static bool _locate_expression(Request& r, const String& method_name, MethodParams *params) {
489: if(params->size()>1)
1.146 paf 490: throw Exception("parser.runtime",
1.145 paf 491: &method_name,
492: "locate by expression has only one parameter - expression");
493:
494: Value& expression_code=params->as_junction(0, "must be expression");
495:
1.165 paf 496: Table& table=static_cast<VTable *>(r.get_self())->table(&method_name);
1.145 paf 497: int saved_current=table.current();
498: int size=table.size();
499: for(int row=0; row<size; row++) {
500: table.set_current(row);
501:
1.147 paf 502: if(r.process_to_value(expression_code).as_bool())
1.145 paf 503: return true;
504: }
505: table.set_current(saved_current);
506: return false;
507: }
508: static bool _locate_name_value(Request& r, const String& method_name, MethodParams *params) {
509: if(params->size()>2)
1.146 paf 510: throw Exception("parser.runtime",
1.145 paf 511: &method_name,
512: "locate by name and value has only two parameters - name and value");
1.72 paf 513:
1.165 paf 514: Table& table=static_cast<VTable *>(r.get_self())->table(&method_name);
1.145 paf 515: return table.locate(
1.120 parser 516: params->as_string(0, "column name must be string"),
517: params->as_string(1, "value must be string")
1.145 paf 518: );
519: }
520: static void _locate(Request& r, const String& method_name, MethodParams *params) {
521: Pool& pool=r.pool();
1.151 paf 522: bool result=params->get(0).get_junction()?
1.145 paf 523: _locate_expression(r, method_name, params) :
1.151 paf 524: _locate_name_value(r, method_name, params);
525: r.write_no_lang(*new(pool) VBool(pool, result));
1.37 paf 526: }
527:
1.61 paf 528: static void _flip(Request& r, const String& method_name, MethodParams *params) {
1.39 paf 529: Pool& pool=r.pool();
1.165 paf 530: Table& old_table=static_cast<VTable *>(r.get_self())->table(&method_name);
1.39 paf 531: Table& new_table=*new(pool) Table(pool, &method_name, 0/*nameless*/);
532: if(old_table.size())
533: if(int old_cols=old_table.at(0).size())
534: for(int column=0; column<old_cols; column++) {
535: Array& new_row=*new(pool) Array(pool, old_table.size());
536: for(int i=0; i<old_table.size(); i++) {
537: const Array& old_row=old_table.at(i);
1.126 parser 538: new_row+=column<old_row.size()?old_row.get(column):new(pool) String(pool);
1.39 paf 539: }
540: new_table+=&new_row;
541: }
542:
1.99 parser 543: r.write_no_lang(*new(pool) VTable(pool, &new_table));
1.39 paf 544: }
545:
1.61 paf 546: static void _append(Request& r, const String& method_name, MethodParams *params) {
1.41 paf 547: Pool& pool=r.pool();
1.134 paf 548: // data
549: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.61 paf 550: const String& string=
1.147 paf 551: r.process_to_string(params->as_junction(0, "body must be code"));
1.41 paf 552:
553: // parse cells
554: Array& row=*new(pool) Array(pool);
1.137 paf 555: string.split(row, 0, "\t", 1, String::UL_AS_IS);
1.41 paf 556:
1.165 paf 557: static_cast<VTable *>(r.get_self())->table(&method_name)+=&row;
1.41 paf 558: }
559:
1.61 paf 560: static void _join(Request& r, const String& method_name, MethodParams *params) {
1.42 paf 561: Pool& pool=r.pool();
562:
1.90 parser 563: Table *maybe_src=params->as_no_junction(0, "table ref must not be code").get_table();
1.42 paf 564: if(!maybe_src)
1.146 paf 565: throw Exception("parser.runtime",
1.91 parser 566: &method_name,
1.42 paf 567: "source is not a table");
568:
569: Table& src=*maybe_src;
1.165 paf 570: Table& dest=static_cast<VTable *>(r.get_self())->table(&method_name);
1.42 paf 571: if(&src == &dest)
1.146 paf 572: throw Exception("parser.runtime",
1.91 parser 573: &method_name,
1.42 paf 574: "source and destination are same table");
575:
1.157 paf 576: int offset, limit;
577: get_copy_options(r, method_name, params, 1, src,
578: offset, limit);
579:
1.42 paf 580: if(const Array *dest_columns=dest.columns()) { // dest is named
581: int saved_src_current=src.current();
1.157 paf 582: int m=src.size()-offset;
583: if(!limit || limit>m)
584: limit=m;
585: int end=offset+limit;
586: for(int src_row=offset; src_row<end; src_row++) {
1.42 paf 587: src.set_current(src_row);
588: Array& dest_row=*new(pool) Array(pool);
1.140 paf 589: for(int dest_column=0; dest_column<dest_columns->size(); dest_column++) {
590: const String *src_item=src.item(*dest_columns->get_string(dest_column));
591: dest_row+=src_item?src_item:new(pool) String(pool);
592: }
1.42 paf 593: dest+=&dest_row;
594: }
595: src.set_current(saved_src_current);
596: } else { // dest is nameless
597: for(int src_row=0; src_row<src.size(); src_row++)
598: dest+=&src.at(src_row);
599: }
600: }
601:
1.94 parser 602: #ifndef DOXYGEN
1.169 paf 603: class Table_sql_event_handlers: public SQL_Driver_query_event_handlers {
1.94 parser 604: public:
605: Table_sql_event_handlers(Pool& apool, const String& amethod_name,
606: const String& astatement_string, const char *astatement_cstr) :
607: pool(apool),
608: method_name(amethod_name),
609: statement_string(astatement_string),
610: statement_cstr(astatement_cstr),
611: columns(*new(pool) Array(pool)),
1.134 paf 612: row(0),
1.94 parser 613: table(0)
614: {
615: }
616:
1.170 paf 617: bool add_column(SQL_Error& error, void *ptr, size_t size) {
618: try {
619: String *column=new(pool) String(pool);
620: column->APPEND_TAINTED(
1.94 parser 621: (const char *)ptr, size,
1.170 paf 622: statement_cstr, 0);
623: columns+=column;
624: return false;
625: } catch(...) {
626: error=SQL_Error("exception occured in Table_sql_event_handlers::add_column");
627: return true;
628: }
629: }
630: bool before_rows(SQL_Error& error) {
631: try {
632: table=new(pool) Table(pool, &method_name, &columns);
633: return false;
634: } catch(...) {
635: error=SQL_Error("exception occured in Table_sql_event_handlers::before_rows");
636: return true;
637: }
638: }
639: bool add_row(SQL_Error& error) {
640: try {
641: (*table)+=(row=new(pool) Array(pool));
642: return false;
643: } catch(...) {
644: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row");
645: return true;
646: }
647: }
648: bool add_row_cell(SQL_Error& error, void *ptr, size_t size) {
649: try {
650: String *cell=new(pool) String(pool);
651: if(size)
652: cell->APPEND_TAINTED(
653: (const char *)ptr, size,
654: statement_cstr, table->size()-1);
655: (*row)+=cell;
656: return false;
657: } catch(...) {
658: error=SQL_Error("exception occured in Table_sql_event_handlers::add_row_cell");
659: return true;
660: }
1.94 parser 661: }
662:
663: private:
664: Pool& pool;
665: const String& method_name;
666: const String& statement_string; const char *statement_cstr;
667: Array& columns;
668: Array *row;
669: public:
670: Table *table;
671: };
672: #endif
1.61 paf 673: static void _sql(Request& r, const String& method_name, MethodParams *params) {
1.49 paf 674: Pool& pool=r.pool();
675:
1.90 parser 676: Value& statement=params->as_junction(0, "statement must be code");
1.49 paf 677:
1.53 paf 678: ulong limit=0;
1.100 parser 679: ulong offset=0;
1.49 paf 680: if(params->size()>1) {
1.109 parser 681: Value& voptions=params->as_no_junction(1, "options must be hash, not code");
1.156 paf 682: if(!voptions.is_string())
1.128 parser 683: if(Hash *options=voptions.get_hash(&method_name)) {
1.164 paf 684: int valid_options=0;
685: if(Value *vlimit=(Value *)options->get(*sql_limit_name)) {
686: valid_options++;
1.147 paf 687: limit=(ulong)r.process_to_value(*vlimit).as_double();
1.164 paf 688: }
689: if(Value *voffset=(Value *)options->get(*sql_offset_name)) {
690: valid_options++;
1.147 paf 691: offset=(ulong)r.process_to_value(*voffset).as_double();
1.164 paf 692: }
693: if(valid_options!=options->size())
694: throw Exception("parser.runtime",
695: &method_name,
696: "called with invalid option");
1.109 parser 697: } else
1.146 paf 698: throw Exception("parser.runtime",
1.109 parser 699: &method_name,
700: "options must be hash");
1.49 paf 701: }
702:
1.54 paf 703: Temp_lang temp_lang(r, String::UL_SQL);
1.147 paf 704: const String& statement_string=r.process_to_string(statement);
1.55 paf 705: const char *statement_cstr=
1.138 paf 706: statement_string.cstr(String::UL_UNSPECIFIED, r.connection(&method_name));
1.94 parser 707: Table_sql_event_handlers handlers(pool, method_name,
708: statement_string, statement_cstr);
1.135 paf 709: #ifdef RESOURCES_DEBUG
710: struct timeval mt[2];
711: //measure:before
712: gettimeofday(&mt[0],NULL);
713: #endif
1.160 paf 714: r.connection(&method_name)->query(
715: statement_cstr, offset, limit,
716: handlers,
717: statement_string);
1.135 paf 718:
719: #ifdef RESOURCES_DEBUG
720: //measure:after connect
721: gettimeofday(&mt[1],NULL);
722:
723: double t[2];
724: for(int i=0;i<2;i++)
725: t[i]=mt[i].tv_sec+mt[i].tv_usec/1000000.0;
726:
727: r.sql_request_time+=t[1]-t[0];
728: #endif
1.96 parser 729:
730: Table *result=
731: handlers.table?handlers.table: // query resulted in table? return it
732: new(pool) Table(pool, &method_name, 0); // query returned no table, fake it
1.49 paf 733:
734: // replace any previous table value
1.165 paf 735: static_cast<VTable *>(r.get_self())->set_table(*result);
1.49 paf 736: }
737:
1.88 parser 738: static void _columns(Request& r, const String& method_name, MethodParams *) {
739: Pool& pool=r.pool();
740:
741: Array& result_columns=*new(pool) Array(pool);
1.89 parser 742: result_columns+=new(pool) String(pool, "column");
1.88 parser 743: Table& result_table=*new(pool) Table(pool, &method_name, &result_columns);
744:
1.165 paf 745: Table& source_table=static_cast<VTable *>(r.get_self())->table(&method_name);
1.88 parser 746: if(const Array *source_columns=source_table.columns()) {
1.98 parser 747: Array_iter i(*source_columns);
748: while(i.has_next()) {
1.88 parser 749: Array& result_row=*new(pool) Array(pool);
1.98 parser 750: result_row+=i.next();
1.88 parser 751: result_table+=&result_row;
752: }
753: }
754:
1.151 paf 755: r.write_no_lang(*new(pool) VTable(pool, &result_table));
1.88 parser 756: }
757:
1.148 paf 758: static void _select(Request& r, const String& method_name, MethodParams *params) {
759: Pool& pool=r.pool();
760:
761: Value& vcondition=params->as_junction(0, "condition must be expression");
762:
1.165 paf 763: Table& source_table=static_cast<VTable *>(r.get_self())->table(&method_name);
1.148 paf 764: Table& result_table=*new(pool) Table(pool,
765: source_table.origin_string(),
766: source_table.columns()
767: );
768:
769: int saved_current=source_table.current();
770: int size=source_table.size();
771: for(int row=0; row<size; row++) {
772: source_table.set_current(row);
773:
1.150 paf 774: bool condition=r.process_to_value(vcondition,
1.149 paf 775: /*0/*no name* /,*/
1.148 paf 776: false/*don't intercept string*/).as_bool();
777:
778: if(condition) // ...condition is true=
779: result_table+=&source_table.at(row); // =green light to go to result
780: }
781: source_table.set_current(saved_current);
782:
1.151 paf 783: r.write_no_lang(*new(pool) VTable(pool, &result_table));
1.148 paf 784: }
785:
1.66 paf 786: // constructor
787:
1.151 paf 788: MTable::MTable(Pool& apool) : Methoded(apool, "table") {
1.142 paf 789: // ^table::create{data}
790: // ^table::create[nameless]{data}
791: // ^table::create[table]
792: add_native_method("create", Method::CT_DYNAMIC, _create, 1, 2);
793: // old name for compatibility with <= v 1.141 2002/01/25 11:33:45 paf
794: add_native_method("set", Method::CT_DYNAMIC, _create, 1, 2);
1.2 paf 795:
1.142 paf 796: // ^table::load[file]
797: // ^table::load[nameless;file]
1.168 paf 798: add_native_method("load", Method::CT_DYNAMIC, _load, 1, 3);
1.22 paf 799:
800: // ^table.save[file]
801: // ^table.save[nameless;file]
1.66 paf 802: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 2);
1.6 paf 803:
804: // ^table.count[]
1.66 paf 805: add_native_method("count", Method::CT_DYNAMIC, _count, 0, 0);
1.6 paf 806:
807: // ^table.line[]
1.66 paf 808: add_native_method("line", Method::CT_DYNAMIC, _line, 0, 0);
1.6 paf 809:
1.10 paf 810: // ^table.offset[]
1.133 paf 811: // ^table.offset(offset)
812: // ^table.offset[cur|set](offset)
813: add_native_method("offset", Method::CT_DYNAMIC, _offset, 0, 2);
1.7 paf 814:
1.10 paf 815: // ^table.menu{code}
816: // ^table.menu{code}[delim]
1.66 paf 817: add_native_method("menu", Method::CT_DYNAMIC, _menu, 1, 2);
1.74 paf 818:
1.79 paf 819: // ^table:hash[key field name]
1.123 parser 820: // ^table:hash[key field name][value field name(s) string/table]
1.163 paf 821: add_native_method("hash", Method::CT_DYNAMIC, _hash, 1, 3);
1.32 paf 822:
1.102 parser 823: // ^table.sort{string-key-maker} ^table.sort{string-key-maker}[desc|asc]
824: // ^table.sort(numeric-key-maker) ^table.sort(numeric-key-maker)[desc|asc]
1.66 paf 825: add_native_method("sort", Method::CT_DYNAMIC, _sort, 1, 2);
1.8 paf 826:
1.36 paf 827: // ^table.locate[field;value]
1.145 paf 828: add_native_method("locate", Method::CT_DYNAMIC, _locate, 1, 2);
1.39 paf 829:
830: // ^table.flip[]
1.66 paf 831: add_native_method("flip", Method::CT_DYNAMIC, _flip, 0, 0);
1.41 paf 832:
833: // ^table.append{r{tab}e{tab}c{tab}o{tab}r{tab}d}
1.66 paf 834: add_native_method("append", Method::CT_DYNAMIC, _append, 1, 1);
1.42 paf 835:
1.157 paf 836: // ^table.join[table][$.limit(10) $.offset(1) $.offset[cur] ]
837: add_native_method("join", Method::CT_DYNAMIC, _join, 1, 2);
1.49 paf 838:
839:
1.100 parser 840: // ^table:sql[query]
841: // ^table:sql[query][$.limit(1) $.offset(2)]
842: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.88 parser 843:
844: // ^table:columns[]
845: add_native_method("columns", Method::CT_DYNAMIC, _columns, 0, 0);
1.148 paf 846:
847: // ^table.select(expression) = table
848: add_native_method("select", Method::CT_DYNAMIC, _select, 1, 1);
1.66 paf 849: }
850:
851: // global variable
852:
853: Methoded *table_class;
854:
855: // creator
856:
857: Methoded *MTable_create(Pool& pool) {
858: return table_class=new(pool) MTable(pool);
1.40 paf 859: }
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