Annotation of parser3/src/classes/string.C, revision 1.103
1.24 paf 1: /** @file
2: Parser: @b string parser class.
3:
1.96 paf 4: Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
1.97 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.24 paf 6:
1.103 ! paf 7: $Id: string.C,v 1.102 2002/04/15 11:34:24 paf Exp $
1.1 paf 8: */
9:
1.43 paf 10: #include "classes.h"
1.1 paf 11: #include "pa_request.h"
12: #include "pa_vdouble.h"
13: #include "pa_vint.h"
1.17 paf 14: #include "pa_vtable.h"
1.25 paf 15: #include "pa_vbool.h"
1.27 paf 16: #include "pa_string.h"
1.53 parser 17: #include "pa_sql_connection.h"
1.71 parser 18: #include "pa_dictionary.h"
1.1 paf 19:
1.41 paf 20: // class
21:
22: class MString : public Methoded {
23: public:
24: MString(Pool& pool);
1.44 paf 25: public: // Methoded
1.53 parser 26: bool used_directly() { return true; }
1.41 paf 27: };
1.1 paf 28:
29: // methods
30:
1.47 paf 31: static void _length(Request& r, const String& method_name, MethodParams *) {
1.1 paf 32: Pool& pool=r.pool();
1.103 ! paf 33: double result=r.self->get_string()->size();
! 34: r.write_no_lang(*new(pool) VDouble(pool, result));
1.1 paf 35: }
36:
1.72 parser 37: static void _int(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 38: Pool& pool=r.pool();
1.72 parser 39: int converted;
1.81 parser 40: Value *default_code=params->size()>0?
41: default_code=¶ms->as_junction(0, "default must be int"):0; // (default)
1.84 parser 42: try {
1.72 parser 43: converted=r.self->as_int();
1.84 parser 44: } catch(...) { // convert problem
45: if(!default_code) // we have a problem when no default
46: /*re*/throw;
47: else
1.99 paf 48: converted=r.process_to_value(*default_code).as_int();
1.72 parser 49: }
1.103 ! paf 50: r.write_no_lang(*new(pool) VInt(pool, converted));
1.1 paf 51: }
52:
1.72 parser 53: static void _double(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 54: Pool& pool=r.pool();
1.72 parser 55: double converted;
1.81 parser 56: Value *default_code=params->size()>0?
57: default_code=¶ms->as_junction(0, "default must be double"):0; // (default)
1.84 parser 58: try {
1.72 parser 59: converted=r.self->as_double();
1.84 parser 60: } catch(...) { // convert problem
61: if(!default_code) // we have a problem when no default
62: /*re*/throw;
63: else
1.99 paf 64: converted=r.process_to_value(*default_code).as_double();
1.72 parser 65: }
66:
1.103 ! paf 67: r.write_no_lang(*new(pool) VDouble(pool, converted));
1.1 paf 68: }
69:
1.38 paf 70: /*not static*/void _string_format(Request& r, const String& method_name, MethodParams *params) {
1.9 paf 71: Pool& pool=r.pool();
72:
1.95 paf 73: Value& fmt_maybe_code=params->get(0);
74: // for some time due to stupid {} in original design
1.99 paf 75: const String& fmt=r.process_to_string(fmt_maybe_code);
1.9 paf 76:
1.95 paf 77: char *buf=format(pool, r.self->as_double(), fmt.cstr());
1.63 parser 78:
79: String result(pool);
80: result.APPEND_CLEAN(buf, 0,
81: method_name.origin().file,
82: method_name.origin().line);
83: r.write_no_lang(result);
1.9 paf 84: }
1.11 paf 85:
1.38 paf 86: static void _left(Request& r, const String&, MethodParams *params) {
1.15 paf 87: Pool& pool=r.pool();
88:
1.78 parser 89: size_t n=(size_t)params->as_int(0, "n must be int", r);
1.15 paf 90:
91: const String& string=*static_cast<VString *>(r.self)->get_string();
1.102 paf 92: r.write_assign_lang(string.mid(0, n));
1.15 paf 93: }
94:
1.38 paf 95: static void _right(Request& r, const String&, MethodParams *params) {
1.15 paf 96: Pool& pool=r.pool();
97:
1.78 parser 98: size_t n=(size_t)params->as_int(0, "n must be int", r);
1.15 paf 99:
100: const String& string=*static_cast<VString *>(r.self)->get_string();
1.102 paf 101: r.write_assign_lang(string.mid(string.size()-n, string.size()));
1.15 paf 102: }
103:
1.38 paf 104: static void _mid(Request& r, const String&, MethodParams *params) {
1.15 paf 105: Pool& pool=r.pool();
106:
1.83 parser 107: const String& string=*static_cast<VString *>(r.self)->get_string();
108:
1.78 parser 109: size_t p=(size_t)params->as_int(0, "p must be int", r);
1.83 parser 110: size_t n=params->size()>1?
111: (size_t)params->as_int(1, "n must be int", r):string.size();
1.15 paf 112:
1.102 paf 113: r.write_assign_lang(string.mid(p, p+n));
1.15 paf 114: }
115:
1.38 paf 116: static void _pos(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 117: Pool& pool=r.pool();
118:
1.59 parser 119: Value& substr=params->as_no_junction(0, "substr must not be code");
1.16 paf 120:
121: const String& string=*static_cast<VString *>(r.self)->get_string();
122: r.write_assign_lang(*new(pool) VInt(pool, string.pos(substr.as_string())));
123: }
124:
1.38 paf 125: static void split_list(Request& r, const String& method_name, MethodParams *params,
1.23 paf 126: const String& string,
127: Array& result) {
1.59 parser 128: Value& delim_value=params->as_no_junction(0, "delimiter must not be code");
1.23 paf 129:
1.45 paf 130: string.split(result, 0, delim_value.as_string());
1.19 paf 131: }
132:
1.38 paf 133: static void _lsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 134: Pool& pool=r.pool();
135: const String& string=*static_cast<VString *>(r.self)->get_string();
136:
1.61 parser 137: Array pieces(pool);
138: split_list(r, method_name, params, string, pieces);
139:
140: Array& columns=*new(pool) Array(pool);
141: columns+=new(pool) String(pool, "piece");
1.19 paf 142:
1.21 paf 143: Table& table=*new(pool) Table(pool, &string,
1.61 parser 144: &columns, pieces.size());
1.69 parser 145: Array_iter i(pieces);
146: while(i.has_next()) {
1.61 parser 147: Array& row=*new(pool) Array(pool);
1.69 parser 148: row+=i.next();
1.61 parser 149: table+=&row;
150: }
1.19 paf 151: r.write_no_lang(*new(pool) VTable(pool, &table));
152: }
153:
1.38 paf 154: static void _rsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 155: Pool& pool=r.pool();
156: const String& string=*static_cast<VString *>(r.self)->get_string();
157:
1.61 parser 158: Array pieces(pool);
159: split_list(r, method_name, params, string, pieces);
1.19 paf 160:
1.61 parser 161: Array& columns=*new(pool) Array(pool);
162: columns+=new(pool) String(pool, "piece");
1.21 paf 163:
164: Table& table=*new(pool) Table(pool, &string,
1.61 parser 165: &columns, pieces.size());
166: for(int i=pieces.size(); --i>=0; ) {
167: Array& row=*new(pool) Array(pool);
168: row+=pieces.get(i);
169: table+=&row;
170: }
1.17 paf 171:
1.19 paf 172: r.write_no_lang(*new(pool) VTable(pool, &table));
1.17 paf 173: }
174:
1.33 paf 175: static void search_action(Table& table, Array *row, int, int, void *) {
1.28 paf 176: if(row)
177: table+=row;
1.27 paf 178: }
179:
1.74 parser 180: #ifndef DOXYGEN
1.27 paf 181: struct Replace_action_info {
1.30 paf 182: Request *request; const String *origin;
1.31 paf 183: const String *src; String *dest;
1.27 paf 184: Value *replacement_code;
1.29 paf 185: const String *post_match;
1.27 paf 186: };
1.74 parser 187: #endif
1.33 paf 188: static void replace_action(Table& table, Array *row, int start, int finish,
1.31 paf 189: void *info) {
1.27 paf 190: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.31 paf 191: if(row) { // begin&middle
192: // piece from last match['start'] to beginning of this match['finish']
193: if(start!=finish)
1.37 paf 194: *ai.dest << ai.src->mid(start, finish);//ai.dest->APPEND_CONST("-");
1.51 parser 195: // store found parts in one-record VTable
1.32 paf 196: if(table.size()) // middle
197: table.put(0, row);
198: else // begin
1.30 paf 199: table+=row;
200: { // execute 'replacement_code' in 'table' context
201: VTable& vtable=*new(table.pool()) VTable(table.pool(), &table);
202:
203: Junction *junction=ai.replacement_code->get_junction();
1.66 parser 204: Value *saved_match_var_value=junction->root->get_element(*match_var_name);
205: junction->root->put_element(*match_var_name, &vtable);
1.101 paf 206: const String& replaced=ai.request->process_to_string(*ai.replacement_code);
1.66 parser 207: junction->root->put_element(*match_var_name, saved_match_var_value);
1.30 paf 208:
1.34 paf 209: /*
1.31 paf 210: ai.dest->APPEND_CONST("(");
1.37 paf 211: *ai.dest << *(String *)row->get(1/*match* /);
1.31 paf 212: ai.dest->APPEND_CONST(")");
1.34 paf 213: */
1.99 paf 214: *ai.dest << replaced;
1.29 paf 215: }
216: ai.post_match=(String *)row->get(2/*post_match*/);
217: } else // end
1.37 paf 218: *ai.dest << *ai.post_match;
1.27 paf 219: }
220:
1.50 parser 221: /// @todo use pcre:study somehow
1.38 paf 222: static void _match(Request& r, const String& method_name, MethodParams *params) {
1.24 paf 223: Pool& pool=r.pool();
1.28 paf 224: const String& src=*static_cast<VString *>(r.self)->get_string();
1.24 paf 225:
1.59 parser 226: Value& regexp=params->as_no_junction(0, "regexp must not be code");
1.38 paf 227:
228: const String *options=
229: params->size()>1?
1.59 parser 230: ¶ms->as_no_junction(1, "options must not be code").as_string():0;
1.24 paf 231:
232: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.25 paf 233: Table *table;
1.27 paf 234: if(params->size()<3) { // search
1.64 parser 235: bool was_global;
1.92 paf 236: bool matched=src.match(
1.39 paf 237: &method_name,
1.32 paf 238: regexp.as_string(), options,
1.27 paf 239: &table,
1.64 parser 240: search_action, 0,
241: &was_global);
1.102 paf 242: Value *result;
1.60 parser 243: // matched
1.64 parser 244: // not (just matched[3=pre/match/post], no substrings) or Global search
245: if(table->columns()->size()>3 || was_global)
246: result=new(pool) VTable(pool, table); // table of pre/match/post+substrings
247: else
248: result=new(pool) VBool(pool, matched);
1.102 paf 249: r.write_assign_lang(*result);
1.27 paf 250: } else { // replace
1.91 paf 251: Value& replacement_code=params->as_junction(2, "replacement param must be code");
1.24 paf 252:
1.102 paf 253: String& result=*new(pool) String(pool);
1.27 paf 254: Replace_action_info replace_action_info={
1.30 paf 255: &r, &method_name,
1.102 paf 256: &src, &result,
1.28 paf 257: &replacement_code,
1.29 paf 258: &src
1.27 paf 259: };
1.92 paf 260: src.match(
1.39 paf 261: &method_name,
1.99 paf 262: r.process_to_string(regexp), options,
1.27 paf 263: &table,
1.33 paf 264: replace_action, &replace_action_info);
1.102 paf 265: r.write_assign_lang(result);
1.27 paf 266: }
1.24 paf 267: }
268:
1.49 parser 269: static void change_case(Request& r, const String& method_name, MethodParams *params,
270: String::Change_case_kind kind) {
271: Pool& pool=r.pool();
272: const String& src=*static_cast<VString *>(r.self)->get_string();
273:
1.102 paf 274: r.write_assign_lang(src.change_case(pool, kind));
1.49 parser 275: }
276: static void _upper(Request& r, const String& method_name, MethodParams *params) {
277: change_case(r, method_name, params, String::CC_UPPER);
278: }
279: static void _lower(Request& r, const String& method_name, MethodParams *params) {
280: change_case(r, method_name, params, String::CC_LOWER);
281: }
282:
1.65 parser 283: #ifndef DOXYGEN
284: class String_sql_event_handlers : public SQL_Driver_query_event_handlers {
285: public:
286: String_sql_event_handlers(Pool& apool,
287: const String& astatement_string, const char *astatement_cstr) :
288: pool(apool),
289: statement_string(astatement_string),
290: statement_cstr(astatement_cstr),
291: got_column(false), got_cell(false) {
292: result=new(pool) String(pool);
293: }
294:
295: void add_column(void *ptr, size_t size) {
296: if(got_column)
1.98 paf 297: throw Exception("parser.runtime",
1.65 parser 298: &statement_string,
299: "result must contain exactly one column");
300: got_column=true;
301: }
302: void before_rows() { /* ignore */ }
303: void add_row() { /* ignore */ }
304: void add_row_cell(void *ptr, size_t size) {
305: if(got_cell)
1.98 paf 306: throw Exception("parser.runtime",
1.65 parser 307: &statement_string,
308: "result must not contain more then one row");
309: got_cell=true;
310:
311: result->APPEND_TAINTED((const char *)ptr, size, statement_cstr, 0);
312: }
313:
314: private:
315: Pool& pool;
316: const String& statement_string; const char *statement_cstr;
317: bool got_column;
318: public:
319: bool got_cell;
320: String *result;
321: };
322: #endif
1.70 parser 323: const String* sql_result_string(Request& r, const String& method_name, MethodParams *params,
1.81 parser 324: Hash *& options, Value *& default_code) {
1.53 parser 325: Pool& pool=r.pool();
326:
1.59 parser 327: Value& statement=params->as_junction(0, "statement must be code");
1.53 parser 328:
1.70 parser 329: ulong limit=0;
330: ulong offset=0;
1.81 parser 331: default_code=0;
1.70 parser 332: if(params->size()>1) {
1.73 parser 333: Value& voptions=params->as_no_junction(1, "options must be hash, not code");
334: if(voptions.is_defined())
1.85 parser 335: if(options=voptions.get_hash(&method_name)) {
1.73 parser 336: if(Value *vlimit=(Value *)options->get(*sql_limit_name))
1.99 paf 337: limit=(ulong)r.process_to_value(*vlimit).as_double();
1.73 parser 338: if(Value *voffset=(Value *)options->get(*sql_offset_name))
1.99 paf 339: offset=(ulong)r.process_to_value(*voffset).as_double();
1.81 parser 340: if(default_code=(Value *)options->get(*sql_default_name)) {
341: if(!default_code->get_junction())
1.98 paf 342: throw Exception("parser.runtime",
1.81 parser 343: &method_name,
344: "default option must be code");
345: }
1.73 parser 346: } else
1.98 paf 347: throw Exception("parser.runtime",
1.73 parser 348: &method_name,
349: "options must be hash");
1.70 parser 350: } else
351: options=0;
352:
1.53 parser 353: Temp_lang temp_lang(r, String::UL_SQL);
1.99 paf 354: const String& statement_string=r.process_to_string(statement);
1.53 parser 355: const char *statement_cstr=
1.93 paf 356: statement_string.cstr(String::UL_UNSPECIFIED, r.connection(&method_name));
1.65 parser 357: String_sql_event_handlers handlers(pool, statement_string, statement_cstr);
1.84 parser 358: try {
1.93 paf 359: r.connection(&method_name)->query(
1.70 parser 360: statement_cstr, offset, limit,
1.65 parser 361: handlers);
1.84 parser 362: } catch(const Exception& e) { // query problem
363: // give more specific source [were url]
1.98 paf 364: throw Exception("sql.execute",
1.84 parser 365: &statement_string,
366: "%s", e.comment());
1.53 parser 367: }
368:
1.65 parser 369: if(!handlers.got_cell)
370: return 0; // no lines, caller should return second param[default value]
1.62 parser 371:
1.65 parser 372: return handlers.result;
1.53 parser 373: }
374:
375: static void _sql(Request& r, const String& method_name, MethodParams *params) {
376: Pool& pool=r.pool();
377:
1.70 parser 378: Hash *options;
1.81 parser 379: Value *default_code;
380: const String *string=sql_result_string(r, method_name, params, options, default_code);
1.62 parser 381: if(!string) {
1.81 parser 382: if(default_code) {
1.99 paf 383: string=&r.process_to_string(*default_code);
1.81 parser 384: if(!string)
385: string=new(pool) String(pool);
1.68 parser 386: } else
1.98 paf 387: throw Exception("parser.runtime",
1.68 parser 388: &method_name,
1.81 parser 389: "produced no result, but no default option specified");
1.62 parser 390: }
1.100 paf 391:
1.102 paf 392: r.write_assign_lang(*string);
1.53 parser 393: }
394:
1.71 parser 395: static void _replace(Request& r, const String& method_name, MethodParams *params) {
396: Pool& pool=r.pool();
397: const String& src=*static_cast<VString *>(r.self)->get_string();
398:
399: Table *table=params->as_no_junction(0, "parameter must not be code").get_table();
400: if(!table)
1.98 paf 401: throw Exception("parser.runtime",
1.71 parser 402: &method_name,
403: "parameter must be table");
404:
405: Dictionary dict(*table);
1.102 paf 406: r.write_assign_lang(src.replace(pool, dict));
1.71 parser 407: }
1.79 parser 408:
409: static void _save(Request& r, const String& method_name, MethodParams *params) {
1.87 paf 410: const String& file_name=params->as_string(params->size()-1,
411: "file name must be string");
1.79 parser 412:
413: const String& src=*static_cast<VString *>(r.self)->get_string();
414:
1.87 paf 415: bool do_append=false;
416: if(params->size()>1) {
417: const String& mode=params->as_string(0, "mode must be string");
418: if(mode=="append")
419: do_append=true;
420: else
1.98 paf 421: throw Exception("parser.runtime",
1.87 paf 422: &mode,
423: "unknown mode, must be 'append'");
424: }
425:
1.79 parser 426: // write
1.89 paf 427: const char *buf=src.cstr(String::UL_UNSPECIFIED);
1.94 paf 428: file_write(r.absolute(file_name),
1.89 paf 429: buf, strlen(buf), true, do_append);
1.79 parser 430: }
431:
1.41 paf 432: // constructor
433:
1.103 ! paf 434: MString::MString(Pool& apool) : Methoded(apool, "string") {
1.1 paf 435: // ^string.length[]
1.41 paf 436: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 437:
1.1 paf 438: // ^string.int[]
1.72 parser 439: // ^string.int(default)
440: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);
1.1 paf 441: // ^string.double[]
1.72 parser 442: // ^string.double(default)
443: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);
1.9 paf 444:
1.24 paf 445: // ^string.format{format}
1.41 paf 446: add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 447:
1.15 paf 448: // ^string.left(n)
1.41 paf 449: add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 450: // ^string.right(n)
1.41 paf 451: add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 452: // ^string.mid(p;n)
1.82 parser 453: add_native_method("mid", Method::CT_DYNAMIC, _mid, 1, 2);
1.16 paf 454:
455: // ^string.pos[substr]
1.41 paf 456: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 457:
458: // ^string.lsplit[delim]
1.41 paf 459: add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 460: // ^string.rsplit[delim]
1.41 paf 461: add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 462:
1.32 paf 463: // ^string.match[regexp][options]
464: // ^string.match[regexp][options]{replacement-code}
1.41 paf 465: add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.49 parser 466:
467: // ^string.toupper[]
468: add_native_method("upper", Method::CT_DYNAMIC, _upper, 0, 0);
469: // ^string.tolower[]
470: add_native_method("lower", Method::CT_DYNAMIC, _lower, 0, 0);
1.53 parser 471:
1.70 parser 472: // ^sql[query]
473: // ^sql[query][$.limit(1) $.offset(2) $.default[n/a]]
1.67 parser 474: add_native_method("sql", Method::CT_STATIC, _sql, 1, 2);
1.71 parser 475:
476: // ^string.replace[table]
477: add_native_method("replace", Method::CT_DYNAMIC, _replace, 1, 1);
1.79 parser 478:
479: // ^string.save[file]
1.87 paf 480: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 2);
1.2 paf 481: }
1.1 paf 482:
1.41 paf 483: // global variable
484:
485: Methoded *string_class;
486:
487: // creator
488:
489: Methoded *MString_create(Pool& pool) {
490: return string_class=new(pool) MString(pool);
491: }
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