Annotation of parser3/src/classes/string.C, revision 1.104
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:
1.104 ! paf 7: $Id: string.C,v 1.103 2002/04/18 10:51:00 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:
1.104 ! paf 175: static void search_action(Table& table, Array *row, int, int, 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;
185: };
1.74 parser 186: #endif
1.104 ! paf 187: static void replace_action(Table& table, Array *row,
! 188: int prestart, int prefinish,
! 189: int poststart, int postfinish,
! 190: void *info) {
1.27 paf 191: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.31 paf 192: if(row) { // begin&middle
1.104 ! paf 193: // piece from last match['prestart'] to beginning of this match['prefinish']
! 194: if(prestart!=prefinish)
! 195: *ai.dest << ai.src->mid(prestart, prefinish);//ai.dest->APPEND_CONST("-");
1.51 parser 196: // store found parts in one-record VTable
1.32 paf 197: if(table.size()) // middle
198: table.put(0, row);
199: else // begin
1.30 paf 200: table+=row;
201: { // execute 'replacement_code' in 'table' context
202: VTable& vtable=*new(table.pool()) VTable(table.pool(), &table);
203:
204: Junction *junction=ai.replacement_code->get_junction();
1.66 parser 205: Value *saved_match_var_value=junction->root->get_element(*match_var_name);
206: junction->root->put_element(*match_var_name, &vtable);
1.101 paf 207: const String& replaced=ai.request->process_to_string(*ai.replacement_code);
1.66 parser 208: junction->root->put_element(*match_var_name, saved_match_var_value);
1.30 paf 209:
1.34 paf 210: /*
1.31 paf 211: ai.dest->APPEND_CONST("(");
1.37 paf 212: *ai.dest << *(String *)row->get(1/*match* /);
1.31 paf 213: ai.dest->APPEND_CONST(")");
1.34 paf 214: */
1.99 paf 215: *ai.dest << replaced;
1.29 paf 216: }
217: } else // end
1.104 ! paf 218: *ai.dest << ai.src->mid(poststart, postfinish);
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,
1.104 ! paf 257: &replacement_code
1.27 paf 258: };
1.92 paf 259: src.match(
1.39 paf 260: &method_name,
1.99 paf 261: r.process_to_string(regexp), options,
1.27 paf 262: &table,
1.33 paf 263: replace_action, &replace_action_info);
1.102 paf 264: r.write_assign_lang(result);
1.27 paf 265: }
1.24 paf 266: }
267:
1.49 parser 268: static void change_case(Request& r, const String& method_name, MethodParams *params,
269: String::Change_case_kind kind) {
270: Pool& pool=r.pool();
271: const String& src=*static_cast<VString *>(r.self)->get_string();
272:
1.102 paf 273: r.write_assign_lang(src.change_case(pool, kind));
1.49 parser 274: }
275: static void _upper(Request& r, const String& method_name, MethodParams *params) {
276: change_case(r, method_name, params, String::CC_UPPER);
277: }
278: static void _lower(Request& r, const String& method_name, MethodParams *params) {
279: change_case(r, method_name, params, String::CC_LOWER);
280: }
281:
1.65 parser 282: #ifndef DOXYGEN
283: class String_sql_event_handlers : public SQL_Driver_query_event_handlers {
284: public:
285: String_sql_event_handlers(Pool& apool,
286: const String& astatement_string, const char *astatement_cstr) :
287: pool(apool),
288: statement_string(astatement_string),
289: statement_cstr(astatement_cstr),
290: got_column(false), got_cell(false) {
291: result=new(pool) String(pool);
292: }
293:
294: void add_column(void *ptr, size_t size) {
295: if(got_column)
1.98 paf 296: throw Exception("parser.runtime",
1.65 parser 297: &statement_string,
298: "result must contain exactly one column");
299: got_column=true;
300: }
301: void before_rows() { /* ignore */ }
302: void add_row() { /* ignore */ }
303: void add_row_cell(void *ptr, size_t size) {
304: if(got_cell)
1.98 paf 305: throw Exception("parser.runtime",
1.65 parser 306: &statement_string,
307: "result must not contain more then one row");
308: got_cell=true;
309:
310: result->APPEND_TAINTED((const char *)ptr, size, statement_cstr, 0);
311: }
312:
313: private:
314: Pool& pool;
315: const String& statement_string; const char *statement_cstr;
316: bool got_column;
317: public:
318: bool got_cell;
319: String *result;
320: };
321: #endif
1.70 parser 322: const String* sql_result_string(Request& r, const String& method_name, MethodParams *params,
1.81 parser 323: Hash *& options, Value *& default_code) {
1.53 parser 324: Pool& pool=r.pool();
325:
1.59 parser 326: Value& statement=params->as_junction(0, "statement must be code");
1.53 parser 327:
1.70 parser 328: ulong limit=0;
329: ulong offset=0;
1.81 parser 330: default_code=0;
1.70 parser 331: if(params->size()>1) {
1.73 parser 332: Value& voptions=params->as_no_junction(1, "options must be hash, not code");
333: if(voptions.is_defined())
1.85 parser 334: if(options=voptions.get_hash(&method_name)) {
1.73 parser 335: if(Value *vlimit=(Value *)options->get(*sql_limit_name))
1.99 paf 336: limit=(ulong)r.process_to_value(*vlimit).as_double();
1.73 parser 337: if(Value *voffset=(Value *)options->get(*sql_offset_name))
1.99 paf 338: offset=(ulong)r.process_to_value(*voffset).as_double();
1.81 parser 339: if(default_code=(Value *)options->get(*sql_default_name)) {
340: if(!default_code->get_junction())
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();
396: const String& src=*static_cast<VString *>(r.self)->get_string();
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:
412: const String& src=*static_cast<VString *>(r.self)->get_string();
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:
1.41 paf 431: // constructor
432:
1.103 paf 433: MString::MString(Pool& apool) : Methoded(apool, "string") {
1.1 paf 434: // ^string.length[]
1.41 paf 435: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 436:
1.1 paf 437: // ^string.int[]
1.72 parser 438: // ^string.int(default)
439: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);
1.1 paf 440: // ^string.double[]
1.72 parser 441: // ^string.double(default)
442: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);
1.9 paf 443:
1.24 paf 444: // ^string.format{format}
1.41 paf 445: add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 446:
1.15 paf 447: // ^string.left(n)
1.41 paf 448: add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 449: // ^string.right(n)
1.41 paf 450: add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 451: // ^string.mid(p;n)
1.82 parser 452: add_native_method("mid", Method::CT_DYNAMIC, _mid, 1, 2);
1.16 paf 453:
454: // ^string.pos[substr]
1.41 paf 455: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 456:
457: // ^string.lsplit[delim]
1.41 paf 458: add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 459: // ^string.rsplit[delim]
1.41 paf 460: add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 461:
1.32 paf 462: // ^string.match[regexp][options]
463: // ^string.match[regexp][options]{replacement-code}
1.41 paf 464: add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.49 parser 465:
466: // ^string.toupper[]
467: add_native_method("upper", Method::CT_DYNAMIC, _upper, 0, 0);
468: // ^string.tolower[]
469: add_native_method("lower", Method::CT_DYNAMIC, _lower, 0, 0);
1.53 parser 470:
1.70 parser 471: // ^sql[query]
472: // ^sql[query][$.limit(1) $.offset(2) $.default[n/a]]
1.67 parser 473: add_native_method("sql", Method::CT_STATIC, _sql, 1, 2);
1.71 parser 474:
475: // ^string.replace[table]
476: add_native_method("replace", Method::CT_DYNAMIC, _replace, 1, 1);
1.79 parser 477:
478: // ^string.save[file]
1.87 paf 479: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 2);
1.2 paf 480: }
1.1 paf 481:
1.41 paf 482: // global variable
483:
484: Methoded *string_class;
485:
486: // creator
487:
488: Methoded *MString_create(Pool& pool) {
489: return string_class=new(pool) MString(pool);
490: }
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