Annotation of parser3/src/classes/string.C, revision 1.110
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:
1.110 ! paf 7: $Id: string.C,v 1.109 2002/04/22 14:25:41 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:
1.108 paf 91: const String& string=static_cast<VString *>(r.self)->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:
1.108 paf 100: const String& string=static_cast<VString *>(r.self)->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();
1.109 paf 106: const String& string=*r.self->get_string();
1.83 parser 107:
1.78 parser 108: size_t p=(size_t)params->as_int(0, "p must be int", r);
1.83 parser 109: size_t n=params->size()>1?
110: (size_t)params->as_int(1, "n must be int", r):string.size();
1.15 paf 111:
1.102 paf 112: r.write_assign_lang(string.mid(p, p+n));
1.15 paf 113: }
114:
1.38 paf 115: static void _pos(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 116: Pool& pool=r.pool();
117:
1.59 parser 118: Value& substr=params->as_no_junction(0, "substr must not be code");
1.16 paf 119:
1.108 paf 120: const String& string=static_cast<VString *>(r.self)->string();
1.16 paf 121: r.write_assign_lang(*new(pool) VInt(pool, string.pos(substr.as_string())));
122: }
123:
1.38 paf 124: static void split_list(Request& r, const String& method_name, MethodParams *params,
1.23 paf 125: const String& string,
126: Array& result) {
1.59 parser 127: Value& delim_value=params->as_no_junction(0, "delimiter must not be code");
1.23 paf 128:
1.45 paf 129: string.split(result, 0, delim_value.as_string());
1.19 paf 130: }
131:
1.38 paf 132: static void _lsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 133: Pool& pool=r.pool();
1.109 paf 134: const String& string=*r.self->get_string();
1.19 paf 135:
1.61 parser 136: Array pieces(pool);
137: split_list(r, method_name, params, string, pieces);
138:
139: Array& columns=*new(pool) Array(pool);
140: columns+=new(pool) String(pool, "piece");
1.19 paf 141:
1.21 paf 142: Table& table=*new(pool) Table(pool, &string,
1.61 parser 143: &columns, pieces.size());
1.69 parser 144: Array_iter i(pieces);
145: while(i.has_next()) {
1.61 parser 146: Array& row=*new(pool) Array(pool);
1.69 parser 147: row+=i.next();
1.61 parser 148: table+=&row;
149: }
1.19 paf 150: r.write_no_lang(*new(pool) VTable(pool, &table));
151: }
152:
1.38 paf 153: static void _rsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 154: Pool& pool=r.pool();
1.109 paf 155: const String& string=*r.self->get_string();
1.19 paf 156:
1.61 parser 157: Array pieces(pool);
158: split_list(r, method_name, params, string, pieces);
1.19 paf 159:
1.61 parser 160: Array& columns=*new(pool) Array(pool);
161: columns+=new(pool) String(pool, "piece");
1.21 paf 162:
163: Table& table=*new(pool) Table(pool, &string,
1.61 parser 164: &columns, pieces.size());
165: for(int i=pieces.size(); --i>=0; ) {
166: Array& row=*new(pool) Array(pool);
167: row+=pieces.get(i);
168: table+=&row;
169: }
1.17 paf 170:
1.19 paf 171: r.write_no_lang(*new(pool) VTable(pool, &table));
1.17 paf 172: }
173:
1.104 paf 174: static void search_action(Table& table, Array *row, int, int, int, int, void *) {
1.28 paf 175: if(row)
176: table+=row;
1.27 paf 177: }
178:
1.74 parser 179: #ifndef DOXYGEN
1.27 paf 180: struct Replace_action_info {
1.30 paf 181: Request *request; const String *origin;
1.31 paf 182: const String *src; String *dest;
1.105 paf 183: VTable *vtable;
1.27 paf 184: Value *replacement_code;
185: };
1.74 parser 186: #endif
1.105 paf 187: /// @todo they can do $global[$result] there, getting pointer to later-invalid local var, kill this
1.104 paf 188: static void replace_action(Table& table, Array *row,
189: int prestart, int prefinish,
190: int poststart, int postfinish,
191: void *info) {
1.27 paf 192: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.31 paf 193: if(row) { // begin&middle
1.104 paf 194: // piece from last match['prestart'] to beginning of this match['prefinish']
195: if(prestart!=prefinish)
196: *ai.dest << ai.src->mid(prestart, prefinish);//ai.dest->APPEND_CONST("-");
1.51 parser 197: // store found parts in one-record VTable
1.32 paf 198: if(table.size()) // middle
199: table.put(0, row);
200: else // begin
1.30 paf 201: table+=row;
202: { // execute 'replacement_code' in 'table' context
1.105 paf 203: ai.vtable->set_table(table);
1.30 paf 204:
1.105 paf 205: *ai.dest << ai.request->process_to_string(*ai.replacement_code);
1.29 paf 206: }
207: } else // end
1.104 paf 208: *ai.dest << ai.src->mid(poststart, postfinish);
1.27 paf 209: }
210:
1.50 parser 211: /// @todo use pcre:study somehow
1.38 paf 212: static void _match(Request& r, const String& method_name, MethodParams *params) {
1.24 paf 213: Pool& pool=r.pool();
1.59 parser 214: Value& regexp=params->as_no_junction(0, "regexp must not be code");
1.38 paf 215:
216: const String *options=
217: params->size()>1?
1.59 parser 218: ¶ms->as_no_junction(1, "options must not be code").as_string():0;
1.24 paf 219:
220: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.25 paf 221: Table *table;
1.27 paf 222: if(params->size()<3) { // search
1.106 paf 223: const String& src=static_cast<VString *>(r.self)->string();
224:
1.64 parser 225: bool was_global;
1.109 paf 226: bool matched=src.match(
1.39 paf 227: &method_name,
1.32 paf 228: regexp.as_string(), options,
1.27 paf 229: &table,
1.64 parser 230: search_action, 0,
231: &was_global);
1.102 paf 232: Value *result;
1.60 parser 233: // matched
1.64 parser 234: // not (just matched[3=pre/match/post], no substrings) or Global search
235: if(table->columns()->size()>3 || was_global)
1.105 paf 236: result=new(pool) VTable(pool, table/*TODO: clone this when table would be stacked!*/); // table of pre/match/post+substrings
1.64 parser 237: else
238: result=new(pool) VBool(pool, matched);
1.102 paf 239: r.write_assign_lang(*result);
1.27 paf 240: } else { // replace
1.106 paf 241: char* src_cstr;
1.109 paf 242: const String& src=*r.self->get_string();
1.106 paf 243:
1.91 paf 244: Value& replacement_code=params->as_junction(2, "replacement param must be code");
1.24 paf 245:
1.102 paf 246: String& result=*new(pool) String(pool);
1.105 paf 247: VTable vtable(pool);
1.27 paf 248: Replace_action_info replace_action_info={
1.30 paf 249: &r, &method_name,
1.102 paf 250: &src, &result,
1.105 paf 251: &vtable,
1.104 paf 252: &replacement_code
1.27 paf 253: };
1.105 paf 254: Temp_value_element temp_match_var(
255: *replacement_code.get_junction()->root,
256: *match_var_name, &vtable);
1.109 paf 257: src.match(
1.39 paf 258: &method_name,
1.99 paf 259: r.process_to_string(regexp), options,
1.27 paf 260: &table,
1.33 paf 261: replace_action, &replace_action_info);
1.102 paf 262: r.write_assign_lang(result);
1.27 paf 263: }
1.24 paf 264: }
265:
1.49 parser 266: static void change_case(Request& r, const String& method_name, MethodParams *params,
267: String::Change_case_kind kind) {
268: Pool& pool=r.pool();
1.106 paf 269: const String& src=static_cast<VString *>(r.self)->string();
1.49 parser 270:
1.102 paf 271: r.write_assign_lang(src.change_case(pool, kind));
1.49 parser 272: }
273: static void _upper(Request& r, const String& method_name, MethodParams *params) {
274: change_case(r, method_name, params, String::CC_UPPER);
275: }
276: static void _lower(Request& r, const String& method_name, MethodParams *params) {
277: change_case(r, method_name, params, String::CC_LOWER);
278: }
279:
1.65 parser 280: #ifndef DOXYGEN
281: class String_sql_event_handlers : public SQL_Driver_query_event_handlers {
282: public:
283: String_sql_event_handlers(Pool& apool,
284: const String& astatement_string, const char *astatement_cstr) :
285: pool(apool),
286: statement_string(astatement_string),
287: statement_cstr(astatement_cstr),
288: got_column(false), got_cell(false) {
289: result=new(pool) String(pool);
290: }
291:
292: void add_column(void *ptr, size_t size) {
293: if(got_column)
1.98 paf 294: throw Exception("parser.runtime",
1.65 parser 295: &statement_string,
296: "result must contain exactly one column");
297: got_column=true;
298: }
299: void before_rows() { /* ignore */ }
300: void add_row() { /* ignore */ }
301: void add_row_cell(void *ptr, size_t size) {
302: if(got_cell)
1.98 paf 303: throw Exception("parser.runtime",
1.65 parser 304: &statement_string,
305: "result must not contain more then one row");
306: got_cell=true;
307:
308: result->APPEND_TAINTED((const char *)ptr, size, statement_cstr, 0);
309: }
310:
311: private:
312: Pool& pool;
313: const String& statement_string; const char *statement_cstr;
314: bool got_column;
315: public:
316: bool got_cell;
317: String *result;
318: };
319: #endif
1.70 parser 320: const String* sql_result_string(Request& r, const String& method_name, MethodParams *params,
1.81 parser 321: Hash *& options, Value *& default_code) {
1.53 parser 322: Pool& pool=r.pool();
323:
1.59 parser 324: Value& statement=params->as_junction(0, "statement must be code");
1.53 parser 325:
1.70 parser 326: ulong limit=0;
327: ulong offset=0;
1.81 parser 328: default_code=0;
1.70 parser 329: if(params->size()>1) {
1.73 parser 330: Value& voptions=params->as_no_junction(1, "options must be hash, not code");
331: if(voptions.is_defined())
1.85 parser 332: if(options=voptions.get_hash(&method_name)) {
1.73 parser 333: if(Value *vlimit=(Value *)options->get(*sql_limit_name))
1.99 paf 334: limit=(ulong)r.process_to_value(*vlimit).as_double();
1.73 parser 335: if(Value *voffset=(Value *)options->get(*sql_offset_name))
1.99 paf 336: offset=(ulong)r.process_to_value(*voffset).as_double();
1.81 parser 337: if(default_code=(Value *)options->get(*sql_default_name)) {
1.110 ! paf 338: if(Junction *default_junction=default_code->get_junction())
! 339: default_junction->change_context(statement.get_junction());
! 340: else
1.98 paf 341: throw Exception("parser.runtime",
1.81 parser 342: &method_name,
343: "default option must be code");
344: }
1.73 parser 345: } else
1.98 paf 346: throw Exception("parser.runtime",
1.73 parser 347: &method_name,
348: "options must be hash");
1.70 parser 349: } else
350: options=0;
351:
1.53 parser 352: Temp_lang temp_lang(r, String::UL_SQL);
1.99 paf 353: const String& statement_string=r.process_to_string(statement);
1.53 parser 354: const char *statement_cstr=
1.93 paf 355: statement_string.cstr(String::UL_UNSPECIFIED, r.connection(&method_name));
1.65 parser 356: String_sql_event_handlers handlers(pool, statement_string, statement_cstr);
1.84 parser 357: try {
1.93 paf 358: r.connection(&method_name)->query(
1.70 parser 359: statement_cstr, offset, limit,
1.65 parser 360: handlers);
1.84 parser 361: } catch(const Exception& e) { // query problem
362: // give more specific source [were url]
1.98 paf 363: throw Exception("sql.execute",
1.84 parser 364: &statement_string,
365: "%s", e.comment());
1.53 parser 366: }
367:
1.65 parser 368: if(!handlers.got_cell)
369: return 0; // no lines, caller should return second param[default value]
1.62 parser 370:
1.65 parser 371: return handlers.result;
1.53 parser 372: }
373:
374: static void _sql(Request& r, const String& method_name, MethodParams *params) {
375: Pool& pool=r.pool();
376:
1.70 parser 377: Hash *options;
1.81 parser 378: Value *default_code;
379: const String *string=sql_result_string(r, method_name, params, options, default_code);
1.62 parser 380: if(!string) {
1.81 parser 381: if(default_code) {
1.99 paf 382: string=&r.process_to_string(*default_code);
1.81 parser 383: if(!string)
384: string=new(pool) String(pool);
1.68 parser 385: } else
1.98 paf 386: throw Exception("parser.runtime",
1.68 parser 387: &method_name,
1.81 parser 388: "produced no result, but no default option specified");
1.62 parser 389: }
1.100 paf 390:
1.102 paf 391: r.write_assign_lang(*string);
1.53 parser 392: }
393:
1.71 parser 394: static void _replace(Request& r, const String& method_name, MethodParams *params) {
395: Pool& pool=r.pool();
1.109 paf 396: const String& src=*r.self->get_string();
1.71 parser 397:
398: Table *table=params->as_no_junction(0, "parameter must not be code").get_table();
399: if(!table)
1.98 paf 400: throw Exception("parser.runtime",
1.71 parser 401: &method_name,
402: "parameter must be table");
403:
404: Dictionary dict(*table);
1.102 paf 405: r.write_assign_lang(src.replace(pool, dict));
1.71 parser 406: }
1.79 parser 407:
408: static void _save(Request& r, const String& method_name, MethodParams *params) {
1.87 paf 409: const String& file_name=params->as_string(params->size()-1,
410: "file name must be string");
1.79 parser 411:
1.106 paf 412: const String& src=static_cast<VString *>(r.self)->string();
1.79 parser 413:
1.87 paf 414: bool do_append=false;
415: if(params->size()>1) {
416: const String& mode=params->as_string(0, "mode must be string");
417: if(mode=="append")
418: do_append=true;
419: else
1.98 paf 420: throw Exception("parser.runtime",
1.87 paf 421: &mode,
422: "unknown mode, must be 'append'");
423: }
424:
1.79 parser 425: // write
1.89 paf 426: const char *buf=src.cstr(String::UL_UNSPECIFIED);
1.94 paf 427: file_write(r.absolute(file_name),
1.89 paf 428: buf, strlen(buf), true, do_append);
1.79 parser 429: }
430:
1.109 paf 431: static void _optimize(Request& r, const String& method_name, MethodParams * /*params*/) {
432: r.write_assign_lang(r.self->get_string()->join_chains(r.pool(), 0/*cstr*/));
433: }
434:
1.41 paf 435: // constructor
436:
1.103 paf 437: MString::MString(Pool& apool) : Methoded(apool, "string") {
1.1 paf 438: // ^string.length[]
1.41 paf 439: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 440:
1.1 paf 441: // ^string.int[]
1.72 parser 442: // ^string.int(default)
443: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);
1.1 paf 444: // ^string.double[]
1.72 parser 445: // ^string.double(default)
446: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);
1.9 paf 447:
1.24 paf 448: // ^string.format{format}
1.41 paf 449: add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 450:
1.15 paf 451: // ^string.left(n)
1.41 paf 452: add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 453: // ^string.right(n)
1.41 paf 454: add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 455: // ^string.mid(p;n)
1.82 parser 456: add_native_method("mid", Method::CT_DYNAMIC, _mid, 1, 2);
1.16 paf 457:
458: // ^string.pos[substr]
1.41 paf 459: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 460:
461: // ^string.lsplit[delim]
1.41 paf 462: add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 463: // ^string.rsplit[delim]
1.41 paf 464: add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 465:
1.32 paf 466: // ^string.match[regexp][options]
467: // ^string.match[regexp][options]{replacement-code}
1.41 paf 468: add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.49 parser 469:
470: // ^string.toupper[]
471: add_native_method("upper", Method::CT_DYNAMIC, _upper, 0, 0);
472: // ^string.tolower[]
473: add_native_method("lower", Method::CT_DYNAMIC, _lower, 0, 0);
1.53 parser 474:
1.70 parser 475: // ^sql[query]
476: // ^sql[query][$.limit(1) $.offset(2) $.default[n/a]]
1.67 parser 477: add_native_method("sql", Method::CT_STATIC, _sql, 1, 2);
1.71 parser 478:
479: // ^string.replace[table]
480: add_native_method("replace", Method::CT_DYNAMIC, _replace, 1, 1);
1.79 parser 481:
482: // ^string.save[file]
1.87 paf 483: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 2);
1.109 paf 484:
485: // ^string.optimize[]
486: add_native_method("optimize", Method::CT_DYNAMIC, _optimize, 0, 0);
1.2 paf 487: }
1.1 paf 488:
1.41 paf 489: // global variable
490:
491: Methoded *string_class;
492:
493: // creator
494:
495: Methoded *MString_create(Pool& pool) {
496: return string_class=new(pool) MString(pool);
497: }
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