Annotation of parser3/src/classes/table.C, revision 1.47
1.20 paf 1: /** @file
1.47 ! paf 2: Parser: @b table parser class.
1.20 paf 3:
1.1 paf 4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.20 paf 5:
1.1 paf 6: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
7:
1.47 ! paf 8: $Id: table.C,v 1.46 2001/04/03 05:32:02 paf Exp $
1.1 paf 9: */
10:
1.24 paf 11: #include "pa_config_includes.h"
1.16 paf 12: #include "pa_common.h"
1.1 paf 13: #include "pa_request.h"
14: #include "_table.h"
15: #include "pa_vtable.h"
1.6 paf 16: #include "pa_vint.h"
1.1 paf 17:
18: // global var
19:
1.14 paf 20: VStateless_class *table_class;
1.1 paf 21:
22: // methods
1.44 paf 23: static void _set(Request& r, const String& method_name, Array *params) {
1.1 paf 24: Pool& pool=r.pool();
25: // data is last parameter
1.44 paf 26: Value *vdata=static_cast<Value *>(params->get(params->size()-1));
27: // forcing {this body type}
28: r.fail_if_junction_(false, *vdata, method_name, "body must be junction");
29:
1.45 paf 30: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.44 paf 31: const String& data=r.process(*vdata).as_string();
32:
33: size_t pos_after=0;
34: // parse columns
35: Array *columns;
36: if(params->size()==2) {
37: columns=0;
1.21 paf 38: } else {
1.44 paf 39: columns=new(pool) Array(pool);
40:
41: Array head(pool);
42: data.split(head, &pos_after, "\n", 1, String::UL_CLEAN, 1);
43: if(head.size())
44: head.get_string(0)->split(*columns, 0, "\t", 1, String::UL_CLEAN);
45: }
46:
47: Table& table=*new(pool) Table(pool, &method_name, columns);
48: // parse cells
49: Array rows(pool);
50: data.split(rows, &pos_after, "\n", 1, String::UL_CLEAN);
51: int size=rows.quick_size();
52: for(int i=0; i<size; i++) {
53: Array& row=*new(pool) Array(pool);
54: const String& string=*rows.quick_get_string(i);
55: // remove empty lines
56: if(!string.size())
57: continue;
58:
59: string.split(row, 0, "\t", 1, String::UL_CLEAN);
60: table+=&row;
1.17 paf 61: }
1.1 paf 62:
1.44 paf 63: // replace any previous table value
64: static_cast<VTable *>(r.self)->set_table(table);
65: }
66:
67: static void _load(Request& r, const String& method_name, Array *params) {
68: Pool& pool=r.pool();
69: // filename is last parameter
70: Value *vfilename=static_cast<Value *>(params->get(params->size()-1));
71: // forcing [this file name type]
72: r.fail_if_junction_(true, *vfilename,
73: method_name, "file name must not be junction");
74:
75: // forcing untaint language
76: String lfilename(pool);
77: lfilename.append(vfilename->as_string(), String::UL_FILE_NAME, true);
78: // loading text
79: char *data=file_read_text(pool, r.absolute(lfilename));
80:
1.1 paf 81: // parse columns
82: Array *columns;
83: #ifndef NO_STRING_ORIGIN
84: const Origin& origin=method_name.origin();
1.2 paf 85: const char *file=origin.file;
1.1 paf 86: uint line=origin.line;
87: #endif
88: if(params->size()==2) {
89: columns=0;
90: } else {
91: columns=new(pool) Array(pool);
92:
93: if(char *row_chars=getrow(&data))
94: do {
95: String *name=new(pool) String(pool);
1.45 paf 96: name->APPEND_TAINTED(lsplit(&row_chars, '\t'), 0, file, line++);
1.1 paf 97: *columns+=name;
98: } while(row_chars);
99: }
100:
101: // parse cells
1.27 paf 102: Table& table=*new(pool) Table(pool, &method_name, columns);
1.1 paf 103: char *row_chars;
104: while(row_chars=getrow(&data)) {
1.28 paf 105: if(!*row_chars) // remove empty lines
106: continue;
1.1 paf 107: Array *row=new(pool) Array(pool);
108: while(char *cell_chars=lsplit(&row_chars, '\t')) {
109: String *cell=new(pool) String(pool);
1.44 paf 110: cell->APPEND_TAINTED(cell_chars, 0, file, line);
1.1 paf 111: *row+=cell;
112: }
113: line++;
114: table+=row;
115: };
116:
117: // replace any previous table value
1.18 paf 118: static_cast<VTable *>(r.self)->set_table(table);
1.1 paf 119: }
1.2 paf 120:
1.22 paf 121: static void _save(Request& r, const String& method_name, Array *params) {
122: Pool& pool=r.pool();
1.39 paf 123: Value *vtable_name=static_cast<Value *>(params->get(params->size()-1));
1.44 paf 124: // forcing this body type]
1.39 paf 125: r.fail_if_junction_(true, *vtable_name,
1.22 paf 126: method_name, "file name must not be junction");
127:
128: // forcing untaint language
1.39 paf 129: String ltable_name(pool);
130: ltable_name.append(vtable_name->as_string(),
1.23 paf 131: String::UL_FILE_NAME, true);
1.22 paf 132:
1.31 paf 133: Table& table=static_cast<VTable *>(r.self)->table();
134:
135: String sdata(pool);
136: if(params->size()==1) { // not nameless=named output
137: // write out names line
138: if(table.columns()) { // named table
139: for(int column=0; column<table.columns()->size(); column++) {
140: if(column)
141: sdata.APPEND_CONST("\t");
142: sdata.append(*static_cast<String *>(table.columns()->quick_get(column)),
143: String::UL_TABLE);
144: }
145: } else { // nameless table
146: int lsize=table.size()?static_cast<Array *>(table.get(0))->size():0;
147: if(lsize)
148: for(int column=0; column<lsize; column++) {
149: char *cindex_tab=(char *)malloc(MAX_NUMBER);
150: snprintf(cindex_tab, MAX_NUMBER, "%d\t", column);
151: sdata.APPEND_CONST(cindex_tab);
152: }
153: else
154: sdata.APPEND_CONST("empty nameless table");
155: }
156: sdata.APPEND_CONST("\n");
157: }
158: // data lines
159: for(int index=0; index<table.size(); index++) {
160: Array *row=static_cast<Array *>(table.quick_get(index));
161: for(int column=0; column<row->size(); column++) {
162: if(column)
163: sdata.APPEND_CONST("\t");
164: sdata.append(*static_cast<String *>(row->quick_get(column)),
165: String::UL_TABLE);
166: }
167: sdata.APPEND_CONST("\n");
168: }
169:
170: // write
1.39 paf 171: file_write(pool, r.absolute(ltable_name), sdata.cstr(), sdata.size(), true);
1.22 paf 172: }
173:
1.39 paf 174: static void _count(Request& r, const String&method_name, Array *) {
1.6 paf 175: Pool& pool=r.pool();
1.18 paf 176: Value& value=*new(pool) VInt(pool, static_cast<VTable *>(r.self)->table().size());
1.15 paf 177: r.write_no_lang(value);
1.6 paf 178: }
179:
1.39 paf 180: static void _line(Request& r, const String& method_name, Array *) {
1.6 paf 181: Pool& pool=r.pool();
1.37 paf 182: Value& value=*new(pool) VInt(pool, 1+static_cast<VTable *>(r.self)->table().current());
1.15 paf 183: r.write_no_lang(value);
1.6 paf 184: }
185:
1.39 paf 186: static void _offset(Request& r, const String& method_name, Array *params) {
1.6 paf 187: Pool& pool=r.pool();
1.18 paf 188: Table& table=static_cast<VTable *>(r.self)->table();
1.37 paf 189: if(params->size())
190: table.shift((int)r.process(*static_cast<Value *>(params->get(0))).as_double());
191: else {
192: Value& value=*new(pool) VInt(pool, table.current());
1.15 paf 193: r.write_no_lang(value);
1.6 paf 194: }
195: }
196:
1.7 paf 197: static void _menu(Request& r, const String& method_name, Array *params) {
198: Value& body_code=*static_cast<Value *>(params->get(0));
199: // forcing ^menu{this param type}
200: r.fail_if_junction_(false, body_code,
201: method_name, "body must be junction");
202:
203: Value *delim_code=params->size()==2?static_cast<Value *>(params->get(1)):0;
204:
1.18 paf 205: Table& table=static_cast<VTable *>(r.self)->table();
1.7 paf 206: bool need_delim=false;
1.37 paf 207: int saved_current=table.current();
1.22 paf 208: for(int row=0; row<table.size(); row++) {
209: table.set_current(row);
1.7 paf 210:
1.12 paf 211: Value& processed_body=r.process(body_code);
1.7 paf 212: if(delim_code) { // delimiter set?
213: const String *string=processed_body.get_string();
214: if(need_delim && string && string->size()) // need delim & iteration produced string?
215: r.write_pass_lang(r.process(*delim_code));
216: need_delim=true;
217: }
218: r.write_pass_lang(processed_body);
219: }
1.37 paf 220: table.set_current(saved_current);
1.7 paf 221: }
222:
1.39 paf 223: static void _empty(Request& r, const String& method_name, Array *params) {
1.18 paf 224: Table& table=static_cast<VTable *>(r.self)->table();
1.8 paf 225: if(table.size()==0) {
226: Value& value=r.process(*static_cast<Value *>(params->get(0)));
227: r.write_pass_lang(value);
228: } else if(params->size()==2) {
229: Value& value=r.process(*static_cast<Value *>(params->get(1)));
230: r.write_pass_lang(value);
231: }
232: }
1.15 paf 233:
1.29 paf 234: struct Record_info {
235: Pool *pool;
236: Table *table;
237: Hash *hash;
238: };
239: static void store_column_item_to_hash(Array::Item *item, void *info) {
240: Record_info& ri=*static_cast<Record_info *>(info);
241: String& column_name=*static_cast<String *>(item);
242: const String *column_item=ri.table->item(column_name);
243: Value *value;
244: if(column_item)
245: value=new(*ri.pool) VString(*column_item);
246: else
247: value=new(*ri.pool) VUnknown(*ri.pool);
248: ri.hash->put(column_name, value);
249: }
1.39 paf 250: static void _record(Request& r, const String& method_name, Array *params) {
1.29 paf 251: Table& table=static_cast<VTable *>(r.self)->table();
252: if(const Array *columns=table.columns()) {
253: Pool& pool=r.pool();
254: Value& value=*new(pool) VHash(pool);
255: Record_info record_info={&pool, &table, value.get_hash()};
256: columns->for_each(store_column_item_to_hash, &record_info);
257:
258: r.write_no_lang(value);
259: }
260: }
261:
1.34 paf 262: struct Seq_item {
263: Array *row;
264: union {
265: char *c_str;
266: double d;
267: } value;
1.32 paf 268: };
1.34 paf 269: static int sort_cmp_string(const void *a, const void *b) {
270: return strcmp(
271: static_cast<const Seq_item *>(a)->value.c_str,
272: static_cast<const Seq_item *>(b)->value.c_str
273: );
274: }
275: static int sort_cmp_double(const void *a, const void *b) {
276: double va=static_cast<const Seq_item *>(a)->value.d;
277: double vb=static_cast<const Seq_item *>(b)->value.d;
278: if(va<vb)
279: return -1;
280: else if(va>vb)
281: return +1;
282: else
283: return 0;
284: }
1.32 paf 285: static void _sort(Request& r, const String& method_name, Array *params) {
286: Value& key_maker=*(Value *)params->get(0);
287: // forcing ^sort{this} ^sort(or this) param type
288: r.fail_if_junction_(false, key_maker, method_name, "key-maker must be junction");
289:
290: bool reverse;
291: if(params->size()==2) { // ..[asc|desc]
1.35 paf 292: Value& order=*(Value *)params->get(1);
1.32 paf 293: // forcing ..[this param-type]
1.35 paf 294: r.fail_if_junction_(true, order, method_name, "order must not be junction");
295: reverse=order.as_string()=="desc";
1.32 paf 296: } else
297: reverse=false;
298:
299: Table& table=static_cast<VTable *>(r.self)->table();
1.34 paf 300:
301: // anything to sort?
302: if(!table.size())
303: return;
304:
305: Seq_item *seq=(Seq_item *)malloc(sizeof(Seq_item)*table.size());
306: int i;
307:
308: // calculate key values
309: bool key_values_are_strings=true;
310: for(i=0; i<table.size(); i++) {
1.32 paf 311: table.set_current(i);
312: // calculate key value
1.34 paf 313: seq[i].row=(Array *)table.get(i);
314: Value& value=*r.process(key_maker).as_expr_result(true/*return string as-is*/);
315: if(i==0) // determining key values type by first one
316: key_values_are_strings=value.is_string();
317:
318: if(key_values_are_strings)
319: seq[i].value.c_str=value.as_string().cstr();
320: else
321: seq[i].value.d=value.as_double();
1.32 paf 322: }
323: // sort keys
1.34 paf 324: _qsort(seq, table.size(), sizeof(Seq_item),
325: key_values_are_strings?sort_cmp_string:sort_cmp_double);
1.32 paf 326:
1.34 paf 327: // reorder table as they require in 'seq'
328: for(i=0; i<table.size(); i++)
329: table.put(i, seq[reverse?table.size()-1-i:i].row);
1.32 paf 330:
1.34 paf 331: // reset 'current'
1.32 paf 332: table.set_current(0);
333: }
334:
1.39 paf 335: static void _locate(Request& r, const String& method_name, Array *params) {
1.36 paf 336: VTable& vtable=*static_cast<VTable *>(r.self);
337: Table& table=vtable.table();
338: vtable.last_locate_was_successful=table.locate(
339: static_cast<Value *>(params->get(0))->as_string(),
340: static_cast<Value *>(params->get(1))->as_string());
341: }
342:
1.37 paf 343: static void _found(Request& r, const String& method_name, Array *params) {
344: if(static_cast<VTable *>(r.self)->last_locate_was_successful) {
345: Value& then_code=*static_cast<Value *>(params->get(0));
346: // forcing ^found{this param type}
347: r.fail_if_junction_(false, then_code,
348: method_name, "found-parameter must be junction");
349: r.write_pass_lang(r.process(then_code));
350: } else if(params->size()==2) {
351: Value& else_code=*static_cast<Value *>(params->get(1));
352: // forcing ^found{this param type}
353: r.fail_if_junction_(false, else_code,
354: method_name, "not found-parameter must be junction");
355: r.write_pass_lang(r.process(else_code));
356: }
357: }
358:
1.39 paf 359: static void _flip(Request& r, const String& method_name, Array *params) {
360: Pool& pool=r.pool();
361: VTable& vtable=*static_cast<VTable *>(r.self);
362:
363: Table& old_table=*vtable.get_table();
364: Table& new_table=*new(pool) Table(pool, &method_name, 0/*nameless*/);
365: if(old_table.size())
366: if(int old_cols=old_table.at(0).size())
367: for(int column=0; column<old_cols; column++) {
368: Array& new_row=*new(pool) Array(pool, old_table.size());
369: for(int i=0; i<old_table.size(); i++) {
370: const Array& old_row=old_table.at(i);
371: new_row+=column<old_row.size()?old_row.get(column):empty_string;
372: }
373: new_table+=&new_row;
374: }
375:
376: vtable.set_table(new_table);
377: }
378:
1.41 paf 379: static void _append(Request& r, const String& method_name, Array *params) {
380: Pool& pool=r.pool();
381: // data is last parameter
382: Value *value=static_cast<Value *>(params->get(0));
1.46 paf 383: // forcing {this body type}
384: r.fail_if_junction_(false, *value, method_name, "body must be junction");
1.41 paf 385:
1.46 paf 386: const String& string=r.process(*value).as_string();
1.41 paf 387:
388: // parse cells
389: Array& row=*new(pool) Array(pool);
1.46 paf 390: string.split(row, 0, "\t", 1, String::UL_CLEAN);
1.41 paf 391:
392: static_cast<VTable *>(r.self)->table()+=&row;
393: }
394:
1.42 paf 395: static void _join(Request& r, const String& method_name, Array *params) {
396: Pool& pool=r.pool();
397:
398: Value *value=static_cast<Value *>(params->get(0));
399: // forcing [this table ref type]
400: r.fail_if_junction_(true, *value, method_name, "table ref must not be junction");
401:
402: Table *maybe_src=value->get_table();
403: if(!maybe_src)
404: RTHROW(0, 0,
405: &method_name,
406: "source is not a table");
407:
408: Table& src=*maybe_src;
409: Table& dest=static_cast<VTable *>(r.self)->table();
410: if(&src == &dest)
411: RTHROW(0, 0,
412: &method_name,
413: "source and destination are same table");
414:
415: if(const Array *dest_columns=dest.columns()) { // dest is named
416: int saved_src_current=src.current();
417: for(int src_row=0; src_row<src.size(); src_row++) {
418: src.set_current(src_row);
419: Array& dest_row=*new(pool) Array(pool);
420: for(int dest_column=0; dest_column<dest_columns->size(); dest_column++)
421: dest_row+=src.item(*dest_columns->get_string(dest_column));
422: dest+=&dest_row;
423: }
424: src.set_current(saved_src_current);
425: } else { // dest is nameless
426: for(int src_row=0; src_row<src.size(); src_row++)
427: dest+=&src.at(src_row);
428: }
429: }
430:
1.15 paf 431: // initialize
1.8 paf 432:
1.14 paf 433: void initialize_table_class(Pool& pool, VStateless_class& vclass) {
1.22 paf 434: // ^table.set{data}
435: // ^table.set[nameless]{data}
1.40 paf 436: vclass.add_native_method("set", Method::CT_DYNAMIC, _set, 1, 2);
1.2 paf 437:
1.10 paf 438: // ^table.load[file]
439: // ^table.load[nameless;file]
1.40 paf 440: vclass.add_native_method("load", Method::CT_DYNAMIC, _load, 1, 2);
1.22 paf 441:
442: // ^table.save[file]
443: // ^table.save[nameless;file]
1.40 paf 444: vclass.add_native_method("save", Method::CT_DYNAMIC, _save, 1, 2);
1.6 paf 445:
446: // ^table.count[]
1.40 paf 447: vclass.add_native_method("count", Method::CT_DYNAMIC, _count, 0, 0);
1.6 paf 448:
449: // ^table.line[]
1.40 paf 450: vclass.add_native_method("line", Method::CT_DYNAMIC, _line, 0, 0);
1.6 paf 451:
1.10 paf 452: // ^table.offset[]
453: // ^table.offset[offset]
1.40 paf 454: vclass.add_native_method("offset", Method::CT_DYNAMIC, _offset, 0, 1);
1.7 paf 455:
1.10 paf 456: // ^table.menu{code}
457: // ^table.menu{code}[delim]
1.40 paf 458: vclass.add_native_method("menu", Method::CT_DYNAMIC, _menu, 1, 2);
1.8 paf 459:
1.10 paf 460: // ^table.empty{code-when-empty}
461: // ^table.empty{code-when-empty}{code-when-not}
1.40 paf 462: vclass.add_native_method("empty", Method::CT_DYNAMIC, _empty, 1, 2);
1.29 paf 463:
464: // ^table.record[]
1.40 paf 465: vclass.add_native_method("record", Method::CT_DYNAMIC, _record, 0, 0);
1.32 paf 466:
467: // ^table.sort{string-key-maker} ^table.sort{string-key-maker}[asc|desc]
468: // ^table.sort(numeric-key-maker) ^table.sort(numeric-key-maker)[asc|desc]
1.40 paf 469: vclass.add_native_method("sort", Method::CT_DYNAMIC, _sort, 1, 2);
1.8 paf 470:
1.36 paf 471: // ^table.locate[field;value]
1.40 paf 472: vclass.add_native_method("locate", Method::CT_DYNAMIC, _locate, 2, 2);
1.37 paf 473: // ^table.found{when-found}
474: // ^table.found{when-found}{when-not-found}
1.40 paf 475: vclass.add_native_method("found", Method::CT_DYNAMIC, _found, 1, 2);
1.39 paf 476:
477: // ^table.flip[]
1.40 paf 478: vclass.add_native_method("flip", Method::CT_DYNAMIC, _flip, 0, 0);
1.41 paf 479:
480: // ^table.append{r{tab}e{tab}c{tab}o{tab}r{tab}d}
481: vclass.add_native_method("append", Method::CT_DYNAMIC, _append, 1, 1);
1.42 paf 482:
483: // ^table.join[table]
484: vclass.add_native_method("join", Method::CT_DYNAMIC, _join, 1, 1);
1.40 paf 485: }
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