Annotation of parser3/src/classes/string.C, revision 1.83
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)
1.75 parser 5: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.24 paf 6:
1.83 ! parser 7: $Id: string.C,v 1.82 2001/10/16 14:49:16 parser 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: // 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;
1.81 parser 46: Value *default_code=params->size()>0?
47: default_code=¶ms->as_junction(0, "default must be int"):0; // (default)
1.72 parser 48: PTRY {
49: converted=r.self->as_int();
50: }
51: PCATCH(e) { // convert problem
1.81 parser 52: if(convert_problem=!default_code) { // we have a problem when no default
1.72 parser 53: rethrow_me=e;
54: converted=0;
55: } else
1.81 parser 56: converted=r.process(*default_code).as_int();
1.72 parser 57: }
58: PEND_CATCH
59: if(convert_problem)
60: PTHROW(rethrow_me.type(), rethrow_me.code(),
61: rethrow_me.problem_source(),
62: rethrow_me.comment());
63:
64: Value& result=*new(pool) VInt(pool, converted);
1.47 paf 65: result.set_name(method_name);
66: r.write_no_lang(result);
1.1 paf 67: }
68:
1.72 parser 69: static void _double(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 70: Pool& pool=r.pool();
1.72 parser 71: bool convert_problem=false; Exception rethrow_me;
72: double converted;
1.81 parser 73: Value *default_code=params->size()>0?
74: default_code=¶ms->as_junction(0, "default must be double"):0; // (default)
1.72 parser 75: PTRY {
76: converted=r.self->as_double();
77: }
78: PCATCH(e) { // convert problem
1.81 parser 79: if(convert_problem=!default_code) { // we have a problem when no default
1.72 parser 80: rethrow_me=e;
81: converted=0;
82: } else
1.81 parser 83: converted=r.process(*default_code).as_double();
1.72 parser 84: }
85: PEND_CATCH
86: if(convert_problem)
87: PTHROW(rethrow_me.type(), rethrow_me.code(),
88: rethrow_me.problem_source(),
89: rethrow_me.comment());
90:
91: Value& result=*new(pool) VDouble(pool, converted);
1.47 paf 92: result.set_name(method_name);
93: r.write_no_lang(result);
1.1 paf 94: }
95:
1.38 paf 96: /*not static*/void _string_format(Request& r, const String& method_name, MethodParams *params) {
1.9 paf 97: Pool& pool=r.pool();
98:
1.59 parser 99: Value& fmt=params->as_junction(0, "fmt must be code");
1.9 paf 100:
1.24 paf 101: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
102: char *buf=format(pool, r.self->as_double(), r.process(fmt).as_string().cstr());
1.63 parser 103:
104: String result(pool);
105: result.APPEND_CLEAN(buf, 0,
106: method_name.origin().file,
107: method_name.origin().line);
108: r.write_no_lang(result);
1.9 paf 109: }
1.11 paf 110:
1.38 paf 111: static void _left(Request& r, const String&, MethodParams *params) {
1.15 paf 112: Pool& pool=r.pool();
113:
1.78 parser 114: size_t n=(size_t)params->as_int(0, "n must be int", r);
1.15 paf 115:
116: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 117: r.write_assign_lang(*new(pool) VString(string.mid(0, n)));
1.15 paf 118: }
119:
1.38 paf 120: static void _right(Request& r, const String&, MethodParams *params) {
1.15 paf 121: Pool& pool=r.pool();
122:
1.78 parser 123: size_t n=(size_t)params->as_int(0, "n must be int", r);
1.15 paf 124:
125: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 126: r.write_assign_lang(*new(pool) VString(string.mid(string.size()-n, string.size())));
1.15 paf 127: }
128:
1.38 paf 129: static void _mid(Request& r, const String&, MethodParams *params) {
1.15 paf 130: Pool& pool=r.pool();
131:
1.83 ! parser 132: const String& string=*static_cast<VString *>(r.self)->get_string();
! 133:
1.78 parser 134: size_t p=(size_t)params->as_int(0, "p must be int", r);
1.83 ! parser 135: size_t n=params->size()>1?
! 136: (size_t)params->as_int(1, "n must be int", r):string.size();
1.15 paf 137:
1.35 paf 138: r.write_assign_lang(*new(pool) VString(string.mid(p, p+n)));
1.15 paf 139: }
140:
1.38 paf 141: static void _pos(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 142: Pool& pool=r.pool();
143:
1.59 parser 144: Value& substr=params->as_no_junction(0, "substr must not be code");
1.16 paf 145:
146: const String& string=*static_cast<VString *>(r.self)->get_string();
147: r.write_assign_lang(*new(pool) VInt(pool, string.pos(substr.as_string())));
148: }
149:
1.38 paf 150: static void split_list(Request& r, const String& method_name, MethodParams *params,
1.23 paf 151: const String& string,
152: Array& result) {
1.59 parser 153: Value& delim_value=params->as_no_junction(0, "delimiter must not be code");
1.23 paf 154:
1.45 paf 155: string.split(result, 0, delim_value.as_string());
1.19 paf 156: }
157:
1.38 paf 158: static void _lsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 159: Pool& pool=r.pool();
160: const String& string=*static_cast<VString *>(r.self)->get_string();
161:
1.61 parser 162: Array pieces(pool);
163: split_list(r, method_name, params, string, pieces);
164:
165: Array& columns=*new(pool) Array(pool);
166: columns+=new(pool) String(pool, "piece");
1.19 paf 167:
1.21 paf 168: Table& table=*new(pool) Table(pool, &string,
1.61 parser 169: &columns, pieces.size());
1.69 parser 170: Array_iter i(pieces);
171: while(i.has_next()) {
1.61 parser 172: Array& row=*new(pool) Array(pool);
1.69 parser 173: row+=i.next();
1.61 parser 174: table+=&row;
175: }
1.19 paf 176: r.write_no_lang(*new(pool) VTable(pool, &table));
177: }
178:
1.38 paf 179: static void _rsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 180: Pool& pool=r.pool();
181: const String& string=*static_cast<VString *>(r.self)->get_string();
182:
1.61 parser 183: Array pieces(pool);
184: split_list(r, method_name, params, string, pieces);
1.19 paf 185:
1.61 parser 186: Array& columns=*new(pool) Array(pool);
187: columns+=new(pool) String(pool, "piece");
1.21 paf 188:
189: Table& table=*new(pool) Table(pool, &string,
1.61 parser 190: &columns, pieces.size());
191: for(int i=pieces.size(); --i>=0; ) {
192: Array& row=*new(pool) Array(pool);
193: row+=pieces.get(i);
194: table+=&row;
195: }
1.17 paf 196:
1.19 paf 197: r.write_no_lang(*new(pool) VTable(pool, &table));
1.17 paf 198: }
199:
1.33 paf 200: static void search_action(Table& table, Array *row, int, int, void *) {
1.28 paf 201: if(row)
202: table+=row;
1.27 paf 203: }
204:
1.74 parser 205: #ifndef DOXYGEN
1.27 paf 206: struct Replace_action_info {
1.30 paf 207: Request *request; const String *origin;
1.31 paf 208: const String *src; String *dest;
1.27 paf 209: Value *replacement_code;
1.29 paf 210: const String *post_match;
1.27 paf 211: };
1.74 parser 212: #endif
1.33 paf 213: static void replace_action(Table& table, Array *row, int start, int finish,
1.31 paf 214: void *info) {
1.27 paf 215: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.31 paf 216: if(row) { // begin&middle
217: // piece from last match['start'] to beginning of this match['finish']
218: if(start!=finish)
1.37 paf 219: *ai.dest << ai.src->mid(start, finish);//ai.dest->APPEND_CONST("-");
1.51 parser 220: // store found parts in one-record VTable
1.32 paf 221: if(table.size()) // middle
222: table.put(0, row);
223: else // begin
1.30 paf 224: table+=row;
225: { // execute 'replacement_code' in 'table' context
226: VTable& vtable=*new(table.pool()) VTable(table.pool(), &table);
227: vtable.set_name(*ai.origin);
228:
229: Junction *junction=ai.replacement_code->get_junction();
1.66 parser 230: Value *saved_match_var_value=junction->root->get_element(*match_var_name);
231: junction->root->put_element(*match_var_name, &vtable);
1.30 paf 232: Value& replaced=ai.request->process(*ai.replacement_code, ai.origin, false);
1.66 parser 233: junction->root->put_element(*match_var_name, saved_match_var_value);
1.30 paf 234:
1.34 paf 235: /*
1.31 paf 236: ai.dest->APPEND_CONST("(");
1.37 paf 237: *ai.dest << *(String *)row->get(1/*match* /);
1.31 paf 238: ai.dest->APPEND_CONST(")");
1.34 paf 239: */
1.37 paf 240: *ai.dest << replaced.as_string();
1.29 paf 241: }
242: ai.post_match=(String *)row->get(2/*post_match*/);
243: } else // end
1.37 paf 244: *ai.dest << *ai.post_match;
1.27 paf 245: }
246:
1.50 parser 247: /// @todo use pcre:study somehow
1.38 paf 248: static void _match(Request& r, const String& method_name, MethodParams *params) {
1.24 paf 249: Pool& pool=r.pool();
1.28 paf 250: const String& src=*static_cast<VString *>(r.self)->get_string();
1.24 paf 251:
1.59 parser 252: Value& regexp=params->as_no_junction(0, "regexp must not be code");
1.38 paf 253:
254: const String *options=
255: params->size()>1?
1.59 parser 256: ¶ms->as_no_junction(1, "options must not be code").as_string():0;
1.24 paf 257:
1.27 paf 258: Value *result;
1.24 paf 259: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.25 paf 260: Table *table;
1.27 paf 261: if(params->size()<3) { // search
1.64 parser 262: bool was_global;
1.76 parser 263: bool matched=src.match(r.pcre_tables(),
1.39 paf 264: &method_name,
1.32 paf 265: regexp.as_string(), options,
1.27 paf 266: &table,
1.64 parser 267: search_action, 0,
268: &was_global);
1.60 parser 269: // matched
1.64 parser 270: // not (just matched[3=pre/match/post], no substrings) or Global search
271: if(table->columns()->size()>3 || was_global)
272: result=new(pool) VTable(pool, table); // table of pre/match/post+substrings
273: else
274: result=new(pool) VBool(pool, matched);
1.27 paf 275: } else { // replace
1.59 parser 276: Value& replacement_code=params->as_junction(2, "replacement code must be code");
1.24 paf 277:
1.28 paf 278: String& dest=*new(pool) String(pool);
1.27 paf 279: Replace_action_info replace_action_info={
1.30 paf 280: &r, &method_name,
1.31 paf 281: &src, &dest,
1.28 paf 282: &replacement_code,
1.29 paf 283: &src
1.27 paf 284: };
1.76 parser 285: src.match(r.pcre_tables(),
1.39 paf 286: &method_name,
1.27 paf 287: r.process(regexp).as_string(), options,
288: &table,
1.33 paf 289: replace_action, &replace_action_info);
1.28 paf 290: result=new(pool) VString(dest);
1.27 paf 291: }
1.26 paf 292: result->set_name(method_name);
1.34 paf 293: r.write_assign_lang(*result);
1.24 paf 294: }
295:
1.49 parser 296: static void change_case(Request& r, const String& method_name, MethodParams *params,
297: String::Change_case_kind kind) {
298: Pool& pool=r.pool();
299: const String& src=*static_cast<VString *>(r.self)->get_string();
300:
1.76 parser 301: r.write_assign_lang(*new(pool) VString(src.change_case(pool, r.pcre_tables(),
1.49 parser 302: kind)));
303: }
304: static void _upper(Request& r, const String& method_name, MethodParams *params) {
305: change_case(r, method_name, params, String::CC_UPPER);
306: }
307: static void _lower(Request& r, const String& method_name, MethodParams *params) {
308: change_case(r, method_name, params, String::CC_LOWER);
309: }
310:
1.65 parser 311: #ifndef DOXYGEN
312: class String_sql_event_handlers : public SQL_Driver_query_event_handlers {
313: public:
314: String_sql_event_handlers(Pool& apool,
315: const String& astatement_string, const char *astatement_cstr) :
316: pool(apool),
317: statement_string(astatement_string),
318: statement_cstr(astatement_cstr),
319: got_column(false), got_cell(false) {
320: result=new(pool) String(pool);
321: }
322:
323: void add_column(void *ptr, size_t size) {
324: if(got_column)
325: PTHROW(0, 0,
326: &statement_string,
327: "result must contain exactly one column");
328: got_column=true;
329: }
330: void before_rows() { /* ignore */ }
331: void add_row() { /* ignore */ }
332: void add_row_cell(void *ptr, size_t size) {
333: if(got_cell)
334: PTHROW(0, 0,
335: &statement_string,
336: "result must not contain more then one row");
337: got_cell=true;
338:
339: result->APPEND_TAINTED((const char *)ptr, size, statement_cstr, 0);
340: }
341:
342: private:
343: Pool& pool;
344: const String& statement_string; const char *statement_cstr;
345: bool got_column;
346: public:
347: bool got_cell;
348: String *result;
349: };
350: #endif
1.70 parser 351: const String* sql_result_string(Request& r, const String& method_name, MethodParams *params,
1.81 parser 352: Hash *& options, Value *& default_code) {
1.53 parser 353: Pool& pool=r.pool();
354:
355: if(!r.connection)
356: PTHROW(0, 0,
357: &method_name,
358: "without connect");
359:
1.59 parser 360: Value& statement=params->as_junction(0, "statement must be code");
1.53 parser 361:
1.70 parser 362: ulong limit=0;
363: ulong offset=0;
1.81 parser 364: default_code=0;
1.70 parser 365: if(params->size()>1) {
1.73 parser 366: Value& voptions=params->as_no_junction(1, "options must be hash, not code");
367: if(voptions.is_defined())
368: if(options=voptions.get_hash()) {
369: if(Value *vlimit=(Value *)options->get(*sql_limit_name))
370: limit=(ulong)r.process(*vlimit).as_double();
371: if(Value *voffset=(Value *)options->get(*sql_offset_name))
372: offset=(ulong)r.process(*voffset).as_double();
1.81 parser 373: if(default_code=(Value *)options->get(*sql_default_name)) {
374: if(!default_code->get_junction())
375: PTHROW(0, 0,
376: &method_name,
377: "default option must be code");
378: }
1.73 parser 379: } else
380: PTHROW(0, 0,
381: &method_name,
382: "options must be hash");
1.70 parser 383: } else
384: options=0;
385:
1.53 parser 386: Temp_lang temp_lang(r, String::UL_SQL);
387: const String& statement_string=r.process(statement).as_string();
388: const char *statement_cstr=
389: statement_string.cstr(String::UL_UNSPECIFIED, r.connection);
1.65 parser 390: String_sql_event_handlers handlers(pool, statement_string, statement_cstr);
1.53 parser 391: bool need_rethrow=false; Exception rethrow_me;
392: PTRY {
393: r.connection->query(
1.70 parser 394: statement_cstr, offset, limit,
1.65 parser 395: handlers);
1.53 parser 396: }
397: PCATCH(e) { // query problem
398: rethrow_me=e; need_rethrow=true;
399: }
400: PEND_CATCH
401: if(need_rethrow)
402: PTHROW(rethrow_me.type(), rethrow_me.code(),
403: &statement_string, // setting more specific source [were url]
404: rethrow_me.comment());
405:
1.65 parser 406: if(!handlers.got_cell)
407: return 0; // no lines, caller should return second param[default value]
1.62 parser 408:
1.65 parser 409: return handlers.result;
1.53 parser 410: }
411:
412: static void _sql(Request& r, const String& method_name, MethodParams *params) {
413: Pool& pool=r.pool();
414:
1.70 parser 415: Hash *options;
1.81 parser 416: Value *default_code;
417: const String *string=sql_result_string(r, method_name, params, options, default_code);
1.62 parser 418: if(!string) {
1.81 parser 419: if(default_code) {
420: string=r.process(*default_code).get_string();
421: if(!string)
422: string=new(pool) String(pool);
1.68 parser 423: } else
424: PTHROW(0, 0,
425: &method_name,
1.81 parser 426: "produced no result, but no default option specified");
1.62 parser 427: }
428: VString& result=*new(pool) VString(*string);
1.53 parser 429: result.set_name(method_name);
430: r.write_assign_lang(result);
431: }
432:
1.71 parser 433: static void _replace(Request& r, const String& method_name, MethodParams *params) {
434: Pool& pool=r.pool();
435: const String& src=*static_cast<VString *>(r.self)->get_string();
436:
437: Table *table=params->as_no_junction(0, "parameter must not be code").get_table();
438: if(!table)
439: PTHROW(0, 0,
440: &method_name,
441: "parameter must be table");
442:
443: Dictionary dict(*table);
444: r.write_assign_lang(*new(pool) VString(src.replace(pool, dict)));
445: }
1.79 parser 446:
447: static void _save(Request& r, const String& method_name, MethodParams *params) {
448: Pool& pool=r.pool();
449: Value& vfile_name=params->as_no_junction(0,
450: "file name must not be code");
451:
452: const String& src=*static_cast<VString *>(r.self)->get_string();
453:
454: // write
455: file_write(pool, r.absolute(vfile_name.as_string()),
456: src.cstr(String::UL_AS_IS), src.size(), true);
457: }
458:
1.41 paf 459: // constructor
460:
461: MString::MString(Pool& apool) : Methoded(apool) {
462: set_name(*NEW String(pool(), STRING_CLASS_NAME));
463:
1.9 paf 464:
1.1 paf 465: // ^string.length[]
1.41 paf 466: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 467:
1.1 paf 468: // ^string.int[]
1.72 parser 469: // ^string.int(default)
470: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);
1.1 paf 471: // ^string.double[]
1.72 parser 472: // ^string.double(default)
473: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);
1.9 paf 474:
1.24 paf 475: // ^string.format{format}
1.41 paf 476: add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 477:
1.15 paf 478: // ^string.left(n)
1.41 paf 479: add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 480: // ^string.right(n)
1.41 paf 481: add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 482: // ^string.mid(p;n)
1.82 parser 483: add_native_method("mid", Method::CT_DYNAMIC, _mid, 1, 2);
1.16 paf 484:
485: // ^string.pos[substr]
1.41 paf 486: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 487:
488: // ^string.lsplit[delim]
1.41 paf 489: add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 490: // ^string.rsplit[delim]
1.41 paf 491: add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 492:
1.32 paf 493: // ^string.match[regexp][options]
494: // ^string.match[regexp][options]{replacement-code}
1.41 paf 495: add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.49 parser 496:
497: // ^string.toupper[]
498: add_native_method("upper", Method::CT_DYNAMIC, _upper, 0, 0);
499: // ^string.tolower[]
500: add_native_method("lower", Method::CT_DYNAMIC, _lower, 0, 0);
1.53 parser 501:
1.70 parser 502: // ^sql[query]
503: // ^sql[query][$.limit(1) $.offset(2) $.default[n/a]]
1.67 parser 504: add_native_method("sql", Method::CT_STATIC, _sql, 1, 2);
1.71 parser 505:
506: // ^string.replace[table]
507: add_native_method("replace", Method::CT_DYNAMIC, _replace, 1, 1);
1.79 parser 508:
509: // ^string.save[file]
510: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 1);
1.2 paf 511: }
1.1 paf 512:
1.41 paf 513: // global variable
514:
515: Methoded *string_class;
516:
517: // creator
518:
519: Methoded *MString_create(Pool& pool) {
520: return string_class=new(pool) MString(pool);
521: }
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