Annotation of parser3/src/classes/string.C, revision 1.73
1.24 paf 1: /** @file
2: Parser: @b string parser class.
3:
1.4 paf 4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.24 paf 5:
1.5 paf 6: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.1 paf 7: */
1.73 ! parser 8: static const char *RCSId="$Id: string.C,v 1.72 2001/08/31 09:26:12 parser Exp $";
1.1 paf 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: // defines
1.1 paf 21:
1.41 paf 22: #define STRING_CLASS_NAME "string"
23:
24: // class
25:
26: class MString : public Methoded {
27: public:
28: MString(Pool& pool);
1.44 paf 29: public: // Methoded
1.53 parser 30: bool used_directly() { return true; }
1.41 paf 31: };
1.1 paf 32:
33: // methods
34:
1.47 paf 35: static void _length(Request& r, const String& method_name, MethodParams *) {
1.1 paf 36: Pool& pool=r.pool();
1.47 paf 37: Value& result=*new(pool) VDouble(pool, r.self->get_string()->size());
38: result.set_name(method_name);
39: r.write_no_lang(result);
1.1 paf 40: }
41:
1.72 parser 42: static void _int(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 43: Pool& pool=r.pool();
1.72 parser 44: bool convert_problem=false; Exception rethrow_me;
45: int converted;
46: PTRY {
47: converted=r.self->as_int();
48: }
49: PCATCH(e) { // convert problem
50: if(convert_problem=params->size()==0) { // we have a problem when do not have default
51: rethrow_me=e;
52: converted=0;
53: } else
54: converted=params->as_int(0, r); // (default)
55: }
56: PEND_CATCH
57: if(convert_problem)
58: PTHROW(rethrow_me.type(), rethrow_me.code(),
59: rethrow_me.problem_source(),
60: rethrow_me.comment());
61:
62: Value& result=*new(pool) VInt(pool, converted);
1.47 paf 63: result.set_name(method_name);
64: r.write_no_lang(result);
1.1 paf 65: }
66:
1.72 parser 67: static void _double(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 68: Pool& pool=r.pool();
1.72 parser 69: bool convert_problem=false; Exception rethrow_me;
70: double converted;
71: PTRY {
72: converted=r.self->as_double();
73: }
74: PCATCH(e) { // convert problem
75: if(convert_problem=params->size()==0) { // we have a problem when do not have default
76: rethrow_me=e;
77: converted=0;
78: } else
79: converted=params->as_double(0, r); // (default)
80: }
81: PEND_CATCH
82: if(convert_problem)
83: PTHROW(rethrow_me.type(), rethrow_me.code(),
84: rethrow_me.problem_source(),
85: rethrow_me.comment());
86:
87: Value& result=*new(pool) VDouble(pool, converted);
1.47 paf 88: result.set_name(method_name);
89: r.write_no_lang(result);
1.1 paf 90: }
91:
1.38 paf 92: /*not static*/void _string_format(Request& r, const String& method_name, MethodParams *params) {
1.9 paf 93: Pool& pool=r.pool();
94:
1.59 parser 95: Value& fmt=params->as_junction(0, "fmt must be code");
1.9 paf 96:
1.24 paf 97: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
98: char *buf=format(pool, r.self->as_double(), r.process(fmt).as_string().cstr());
1.63 parser 99:
100: String result(pool);
101: result.APPEND_CLEAN(buf, 0,
102: method_name.origin().file,
103: method_name.origin().line);
104: r.write_no_lang(result);
1.9 paf 105: }
1.11 paf 106:
1.38 paf 107: static void _left(Request& r, const String&, MethodParams *params) {
1.15 paf 108: Pool& pool=r.pool();
109:
1.38 paf 110: size_t n=(size_t)r.process(params->get(0)).as_double();
1.15 paf 111:
112: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 113: r.write_assign_lang(*new(pool) VString(string.mid(0, n)));
1.15 paf 114: }
115:
1.38 paf 116: static void _right(Request& r, const String&, MethodParams *params) {
1.15 paf 117: Pool& pool=r.pool();
118:
1.38 paf 119: size_t n=(size_t)r.process(params->get(0)).as_double();
1.15 paf 120:
121: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 122: r.write_assign_lang(*new(pool) VString(string.mid(string.size()-n, string.size())));
1.15 paf 123: }
124:
1.38 paf 125: static void _mid(Request& r, const String&, MethodParams *params) {
1.15 paf 126: Pool& pool=r.pool();
127:
1.38 paf 128: size_t p=(size_t)r.process(params->get(0)).as_double();
129: size_t n=(size_t)r.process(params->get(1)).as_double();
1.15 paf 130:
131: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 132: r.write_assign_lang(*new(pool) VString(string.mid(p, p+n)));
1.15 paf 133: }
134:
1.38 paf 135: static void _pos(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 136: Pool& pool=r.pool();
137:
1.59 parser 138: Value& substr=params->as_no_junction(0, "substr must not be code");
1.16 paf 139:
140: const String& string=*static_cast<VString *>(r.self)->get_string();
141: r.write_assign_lang(*new(pool) VInt(pool, string.pos(substr.as_string())));
142: }
143:
1.38 paf 144: static void split_list(Request& r, const String& method_name, MethodParams *params,
1.23 paf 145: const String& string,
146: Array& result) {
1.59 parser 147: Value& delim_value=params->as_no_junction(0, "delimiter must not be code");
1.23 paf 148:
1.45 paf 149: string.split(result, 0, delim_value.as_string());
1.19 paf 150: }
151:
1.38 paf 152: static void _lsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 153: Pool& pool=r.pool();
154: const String& string=*static_cast<VString *>(r.self)->get_string();
155:
1.61 parser 156: Array pieces(pool);
157: split_list(r, method_name, params, string, pieces);
158:
159: Array& columns=*new(pool) Array(pool);
160: columns+=new(pool) String(pool, "piece");
1.19 paf 161:
1.21 paf 162: Table& table=*new(pool) Table(pool, &string,
1.61 parser 163: &columns, pieces.size());
1.69 parser 164: Array_iter i(pieces);
165: while(i.has_next()) {
1.61 parser 166: Array& row=*new(pool) Array(pool);
1.69 parser 167: row+=i.next();
1.61 parser 168: table+=&row;
169: }
1.19 paf 170: r.write_no_lang(*new(pool) VTable(pool, &table));
171: }
172:
1.38 paf 173: static void _rsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 174: Pool& pool=r.pool();
175: const String& string=*static_cast<VString *>(r.self)->get_string();
176:
1.61 parser 177: Array pieces(pool);
178: split_list(r, method_name, params, string, pieces);
1.19 paf 179:
1.61 parser 180: Array& columns=*new(pool) Array(pool);
181: columns+=new(pool) String(pool, "piece");
1.21 paf 182:
183: Table& table=*new(pool) Table(pool, &string,
1.61 parser 184: &columns, pieces.size());
185: for(int i=pieces.size(); --i>=0; ) {
186: Array& row=*new(pool) Array(pool);
187: row+=pieces.get(i);
188: table+=&row;
189: }
1.17 paf 190:
1.19 paf 191: r.write_no_lang(*new(pool) VTable(pool, &table));
1.17 paf 192: }
193:
1.33 paf 194: static void search_action(Table& table, Array *row, int, int, void *) {
1.28 paf 195: if(row)
196: table+=row;
1.27 paf 197: }
198:
1.40 paf 199: /// used by string: _match / replace_action
1.27 paf 200: struct Replace_action_info {
1.30 paf 201: Request *request; const String *origin;
1.31 paf 202: const String *src; String *dest;
1.27 paf 203: Value *replacement_code;
1.29 paf 204: const String *post_match;
1.27 paf 205: };
1.33 paf 206: static void replace_action(Table& table, Array *row, int start, int finish,
1.31 paf 207: void *info) {
1.27 paf 208: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.31 paf 209: if(row) { // begin&middle
210: // piece from last match['start'] to beginning of this match['finish']
211: if(start!=finish)
1.37 paf 212: *ai.dest << ai.src->mid(start, finish);//ai.dest->APPEND_CONST("-");
1.51 parser 213: // store found parts in one-record VTable
1.32 paf 214: if(table.size()) // middle
215: table.put(0, row);
216: else // begin
1.30 paf 217: table+=row;
218: { // execute 'replacement_code' in 'table' context
219: VTable& vtable=*new(table.pool()) VTable(table.pool(), &table);
220: vtable.set_name(*ai.origin);
221:
222: Junction *junction=ai.replacement_code->get_junction();
1.66 parser 223: Value *saved_match_var_value=junction->root->get_element(*match_var_name);
224: junction->root->put_element(*match_var_name, &vtable);
1.30 paf 225: Value& replaced=ai.request->process(*ai.replacement_code, ai.origin, false);
1.66 parser 226: junction->root->put_element(*match_var_name, saved_match_var_value);
1.30 paf 227:
1.34 paf 228: /*
1.31 paf 229: ai.dest->APPEND_CONST("(");
1.37 paf 230: *ai.dest << *(String *)row->get(1/*match* /);
1.31 paf 231: ai.dest->APPEND_CONST(")");
1.34 paf 232: */
1.37 paf 233: *ai.dest << replaced.as_string();
1.29 paf 234: }
235: ai.post_match=(String *)row->get(2/*post_match*/);
236: } else // end
1.37 paf 237: *ai.dest << *ai.post_match;
1.27 paf 238: }
239:
1.50 parser 240: /// @todo use pcre:study somehow
1.38 paf 241: static void _match(Request& r, const String& method_name, MethodParams *params) {
1.24 paf 242: Pool& pool=r.pool();
1.28 paf 243: const String& src=*static_cast<VString *>(r.self)->get_string();
1.24 paf 244:
1.59 parser 245: Value& regexp=params->as_no_junction(0, "regexp must not be code");
1.38 paf 246:
247: const String *options=
248: params->size()>1?
1.59 parser 249: ¶ms->as_no_junction(1, "options must not be code").as_string():0;
1.24 paf 250:
1.27 paf 251: Value *result;
1.24 paf 252: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.25 paf 253: Table *table;
1.27 paf 254: if(params->size()<3) { // search
1.64 parser 255: bool was_global;
1.60 parser 256: bool matched=src.match(r.pcre_tables,
1.39 paf 257: &method_name,
1.32 paf 258: regexp.as_string(), options,
1.27 paf 259: &table,
1.64 parser 260: search_action, 0,
261: &was_global);
1.60 parser 262: // matched
1.64 parser 263: // not (just matched[3=pre/match/post], no substrings) or Global search
264: if(table->columns()->size()>3 || was_global)
265: result=new(pool) VTable(pool, table); // table of pre/match/post+substrings
266: else
267: result=new(pool) VBool(pool, matched);
1.27 paf 268: } else { // replace
1.59 parser 269: Value& replacement_code=params->as_junction(2, "replacement code must be code");
1.24 paf 270:
1.28 paf 271: String& dest=*new(pool) String(pool);
1.27 paf 272: Replace_action_info replace_action_info={
1.30 paf 273: &r, &method_name,
1.31 paf 274: &src, &dest,
1.28 paf 275: &replacement_code,
1.29 paf 276: &src
1.27 paf 277: };
1.39 paf 278: src.match(r.pcre_tables,
279: &method_name,
1.27 paf 280: r.process(regexp).as_string(), options,
281: &table,
1.33 paf 282: replace_action, &replace_action_info);
1.28 paf 283: result=new(pool) VString(dest);
1.27 paf 284: }
1.26 paf 285: result->set_name(method_name);
1.34 paf 286: r.write_assign_lang(*result);
1.24 paf 287: }
288:
1.49 parser 289: static void change_case(Request& r, const String& method_name, MethodParams *params,
290: String::Change_case_kind kind) {
291: Pool& pool=r.pool();
292: const String& src=*static_cast<VString *>(r.self)->get_string();
293:
294: r.write_assign_lang(*new(pool) VString(src.change_case(pool, r.pcre_tables,
295: kind)));
296: }
297: static void _upper(Request& r, const String& method_name, MethodParams *params) {
298: change_case(r, method_name, params, String::CC_UPPER);
299: }
300: static void _lower(Request& r, const String& method_name, MethodParams *params) {
301: change_case(r, method_name, params, String::CC_LOWER);
302: }
303:
1.65 parser 304: #ifndef DOXYGEN
305: class String_sql_event_handlers : public SQL_Driver_query_event_handlers {
306: public:
307: String_sql_event_handlers(Pool& apool,
308: const String& astatement_string, const char *astatement_cstr) :
309: pool(apool),
310: statement_string(astatement_string),
311: statement_cstr(astatement_cstr),
312: got_column(false), got_cell(false) {
313: result=new(pool) String(pool);
314: }
315:
316: void add_column(void *ptr, size_t size) {
317: if(got_column)
318: PTHROW(0, 0,
319: &statement_string,
320: "result must contain exactly one column");
321: got_column=true;
322: }
323: void before_rows() { /* ignore */ }
324: void add_row() { /* ignore */ }
325: void add_row_cell(void *ptr, size_t size) {
326: if(got_cell)
327: PTHROW(0, 0,
328: &statement_string,
329: "result must not contain more then one row");
330: got_cell=true;
331:
332: result->APPEND_TAINTED((const char *)ptr, size, statement_cstr, 0);
333: }
334:
335: private:
336: Pool& pool;
337: const String& statement_string; const char *statement_cstr;
338: bool got_column;
339: public:
340: bool got_cell;
341: String *result;
342: };
343: #endif
1.70 parser 344: const String* sql_result_string(Request& r, const String& method_name, MethodParams *params,
345: Hash *&options) {
1.53 parser 346: Pool& pool=r.pool();
347:
348: if(!r.connection)
349: PTHROW(0, 0,
350: &method_name,
351: "without connect");
352:
1.59 parser 353: Value& statement=params->as_junction(0, "statement must be code");
1.53 parser 354:
1.70 parser 355: ulong limit=0;
356: ulong offset=0;
357: if(params->size()>1) {
1.73 ! parser 358: Value& voptions=params->as_no_junction(1, "options must be hash, not code");
! 359: if(voptions.is_defined())
! 360: if(options=voptions.get_hash()) {
! 361: if(Value *vlimit=(Value *)options->get(*sql_limit_name))
! 362: limit=(ulong)r.process(*vlimit).as_double();
! 363: if(Value *voffset=(Value *)options->get(*sql_offset_name))
! 364: offset=(ulong)r.process(*voffset).as_double();
! 365: } else
! 366: PTHROW(0, 0,
! 367: &method_name,
! 368: "options must be hash");
1.70 parser 369: } else
370: options=0;
371:
1.53 parser 372: Temp_lang temp_lang(r, String::UL_SQL);
373: const String& statement_string=r.process(statement).as_string();
374: const char *statement_cstr=
375: statement_string.cstr(String::UL_UNSPECIFIED, r.connection);
1.65 parser 376: String_sql_event_handlers handlers(pool, statement_string, statement_cstr);
1.53 parser 377: bool need_rethrow=false; Exception rethrow_me;
378: PTRY {
379: r.connection->query(
1.70 parser 380: statement_cstr, offset, limit,
1.65 parser 381: handlers);
1.53 parser 382: }
383: PCATCH(e) { // query problem
384: rethrow_me=e; need_rethrow=true;
385: }
386: PEND_CATCH
387: if(need_rethrow)
388: PTHROW(rethrow_me.type(), rethrow_me.code(),
389: &statement_string, // setting more specific source [were url]
390: rethrow_me.comment());
391:
1.65 parser 392: if(!handlers.got_cell)
393: return 0; // no lines, caller should return second param[default value]
1.62 parser 394:
1.65 parser 395: return handlers.result;
1.53 parser 396: }
397:
398: static void _sql(Request& r, const String& method_name, MethodParams *params) {
399: Pool& pool=r.pool();
400:
1.70 parser 401: Hash *options;
402: const String *string=sql_result_string(r, method_name, params, options);
1.62 parser 403: if(!string) {
1.70 parser 404: if(options) {
405: if(Value *vdefault=(Value *)options->get(*sql_default_name)) {
406: if(!vdefault->get_junction())
407: PTHROW(0, 0,
408: &method_name,
409: "default option must be code");
410: string=r.process(*vdefault).get_string();
411: if(!string)
412: string=empty_string;
413: } else
414: PTHROW(0, 0,
415: &method_name,
416: "produced no result, but no default option specified");
1.68 parser 417: } else
418: PTHROW(0, 0,
419: &method_name,
1.70 parser 420: "produced no result, but no options (no default) specified");
1.62 parser 421: }
422: VString& result=*new(pool) VString(*string);
1.53 parser 423: result.set_name(method_name);
424: r.write_assign_lang(result);
425: }
426:
1.71 parser 427: static void _replace(Request& r, const String& method_name, MethodParams *params) {
428: Pool& pool=r.pool();
429: const String& src=*static_cast<VString *>(r.self)->get_string();
430:
431: Table *table=params->as_no_junction(0, "parameter must not be code").get_table();
432: if(!table)
433: PTHROW(0, 0,
434: &method_name,
435: "parameter must be table");
436:
437: Dictionary dict(*table);
438: r.write_assign_lang(*new(pool) VString(src.replace(pool, dict)));
439: }
1.41 paf 440: // constructor
441:
442: MString::MString(Pool& apool) : Methoded(apool) {
443: set_name(*NEW String(pool(), STRING_CLASS_NAME));
444:
1.9 paf 445:
1.1 paf 446: // ^string.length[]
1.41 paf 447: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 448:
1.1 paf 449: // ^string.int[]
1.72 parser 450: // ^string.int(default)
451: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);
1.1 paf 452: // ^string.double[]
1.72 parser 453: // ^string.double(default)
454: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);
1.9 paf 455:
1.24 paf 456: // ^string.format{format}
1.41 paf 457: add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 458:
1.15 paf 459: // ^string.left(n)
1.41 paf 460: add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 461: // ^string.right(n)
1.41 paf 462: add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 463: // ^string.mid(p;n)
1.41 paf 464: add_native_method("mid", Method::CT_DYNAMIC, _mid, 2, 2);
1.16 paf 465:
466: // ^string.pos[substr]
1.41 paf 467: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 468:
469: // ^string.lsplit[delim]
1.41 paf 470: add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 471: // ^string.rsplit[delim]
1.41 paf 472: add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 473:
1.32 paf 474: // ^string.match[regexp][options]
475: // ^string.match[regexp][options]{replacement-code}
1.41 paf 476: add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.49 parser 477:
478: // ^string.toupper[]
479: add_native_method("upper", Method::CT_DYNAMIC, _upper, 0, 0);
480: // ^string.tolower[]
481: add_native_method("lower", Method::CT_DYNAMIC, _lower, 0, 0);
1.53 parser 482:
1.70 parser 483: // ^sql[query]
484: // ^sql[query][$.limit(1) $.offset(2) $.default[n/a]]
1.67 parser 485: add_native_method("sql", Method::CT_STATIC, _sql, 1, 2);
1.71 parser 486:
487: // ^string.replace[table]
488: add_native_method("replace", Method::CT_DYNAMIC, _replace, 1, 1);
1.2 paf 489: }
1.1 paf 490:
1.41 paf 491: // global variable
492:
493: Methoded *string_class;
494:
495: // creator
496:
497: Methoded *MString_create(Pool& pool) {
498: return string_class=new(pool) MString(pool);
499: }
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