Annotation of parser3/src/classes/string.C, revision 1.76
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:
1.76 ! parser 7: $Id: string.C,v 1.75 2001/09/26 10:32:25 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;
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:
1.74 parser 199: #ifndef DOXYGEN
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: };
1.74 parser 206: #endif
1.33 paf 207: static void replace_action(Table& table, Array *row, int start, int finish,
1.31 paf 208: void *info) {
1.27 paf 209: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.31 paf 210: if(row) { // begin&middle
211: // piece from last match['start'] to beginning of this match['finish']
212: if(start!=finish)
1.37 paf 213: *ai.dest << ai.src->mid(start, finish);//ai.dest->APPEND_CONST("-");
1.51 parser 214: // store found parts in one-record VTable
1.32 paf 215: if(table.size()) // middle
216: table.put(0, row);
217: else // begin
1.30 paf 218: table+=row;
219: { // execute 'replacement_code' in 'table' context
220: VTable& vtable=*new(table.pool()) VTable(table.pool(), &table);
221: vtable.set_name(*ai.origin);
222:
223: Junction *junction=ai.replacement_code->get_junction();
1.66 parser 224: Value *saved_match_var_value=junction->root->get_element(*match_var_name);
225: junction->root->put_element(*match_var_name, &vtable);
1.30 paf 226: Value& replaced=ai.request->process(*ai.replacement_code, ai.origin, false);
1.66 parser 227: junction->root->put_element(*match_var_name, saved_match_var_value);
1.30 paf 228:
1.34 paf 229: /*
1.31 paf 230: ai.dest->APPEND_CONST("(");
1.37 paf 231: *ai.dest << *(String *)row->get(1/*match* /);
1.31 paf 232: ai.dest->APPEND_CONST(")");
1.34 paf 233: */
1.37 paf 234: *ai.dest << replaced.as_string();
1.29 paf 235: }
236: ai.post_match=(String *)row->get(2/*post_match*/);
237: } else // end
1.37 paf 238: *ai.dest << *ai.post_match;
1.27 paf 239: }
240:
1.50 parser 241: /// @todo use pcre:study somehow
1.38 paf 242: static void _match(Request& r, const String& method_name, MethodParams *params) {
1.24 paf 243: Pool& pool=r.pool();
1.28 paf 244: const String& src=*static_cast<VString *>(r.self)->get_string();
1.24 paf 245:
1.59 parser 246: Value& regexp=params->as_no_junction(0, "regexp must not be code");
1.38 paf 247:
248: const String *options=
249: params->size()>1?
1.59 parser 250: ¶ms->as_no_junction(1, "options must not be code").as_string():0;
1.24 paf 251:
1.27 paf 252: Value *result;
1.24 paf 253: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.25 paf 254: Table *table;
1.27 paf 255: if(params->size()<3) { // search
1.64 parser 256: bool was_global;
1.76 ! parser 257: bool matched=src.match(r.pcre_tables(),
1.39 paf 258: &method_name,
1.32 paf 259: regexp.as_string(), options,
1.27 paf 260: &table,
1.64 parser 261: search_action, 0,
262: &was_global);
1.60 parser 263: // matched
1.64 parser 264: // not (just matched[3=pre/match/post], no substrings) or Global search
265: if(table->columns()->size()>3 || was_global)
266: result=new(pool) VTable(pool, table); // table of pre/match/post+substrings
267: else
268: result=new(pool) VBool(pool, matched);
1.27 paf 269: } else { // replace
1.59 parser 270: Value& replacement_code=params->as_junction(2, "replacement code must be code");
1.24 paf 271:
1.28 paf 272: String& dest=*new(pool) String(pool);
1.27 paf 273: Replace_action_info replace_action_info={
1.30 paf 274: &r, &method_name,
1.31 paf 275: &src, &dest,
1.28 paf 276: &replacement_code,
1.29 paf 277: &src
1.27 paf 278: };
1.76 ! parser 279: src.match(r.pcre_tables(),
1.39 paf 280: &method_name,
1.27 paf 281: r.process(regexp).as_string(), options,
282: &table,
1.33 paf 283: replace_action, &replace_action_info);
1.28 paf 284: result=new(pool) VString(dest);
1.27 paf 285: }
1.26 paf 286: result->set_name(method_name);
1.34 paf 287: r.write_assign_lang(*result);
1.24 paf 288: }
289:
1.49 parser 290: static void change_case(Request& r, const String& method_name, MethodParams *params,
291: String::Change_case_kind kind) {
292: Pool& pool=r.pool();
293: const String& src=*static_cast<VString *>(r.self)->get_string();
294:
1.76 ! parser 295: r.write_assign_lang(*new(pool) VString(src.change_case(pool, r.pcre_tables(),
1.49 parser 296: kind)));
297: }
298: static void _upper(Request& r, const String& method_name, MethodParams *params) {
299: change_case(r, method_name, params, String::CC_UPPER);
300: }
301: static void _lower(Request& r, const String& method_name, MethodParams *params) {
302: change_case(r, method_name, params, String::CC_LOWER);
303: }
304:
1.65 parser 305: #ifndef DOXYGEN
306: class String_sql_event_handlers : public SQL_Driver_query_event_handlers {
307: public:
308: String_sql_event_handlers(Pool& apool,
309: const String& astatement_string, const char *astatement_cstr) :
310: pool(apool),
311: statement_string(astatement_string),
312: statement_cstr(astatement_cstr),
313: got_column(false), got_cell(false) {
314: result=new(pool) String(pool);
315: }
316:
317: void add_column(void *ptr, size_t size) {
318: if(got_column)
319: PTHROW(0, 0,
320: &statement_string,
321: "result must contain exactly one column");
322: got_column=true;
323: }
324: void before_rows() { /* ignore */ }
325: void add_row() { /* ignore */ }
326: void add_row_cell(void *ptr, size_t size) {
327: if(got_cell)
328: PTHROW(0, 0,
329: &statement_string,
330: "result must not contain more then one row");
331: got_cell=true;
332:
333: result->APPEND_TAINTED((const char *)ptr, size, statement_cstr, 0);
334: }
335:
336: private:
337: Pool& pool;
338: const String& statement_string; const char *statement_cstr;
339: bool got_column;
340: public:
341: bool got_cell;
342: String *result;
343: };
344: #endif
1.70 parser 345: const String* sql_result_string(Request& r, const String& method_name, MethodParams *params,
346: Hash *&options) {
1.53 parser 347: Pool& pool=r.pool();
348:
349: if(!r.connection)
350: PTHROW(0, 0,
351: &method_name,
352: "without connect");
353:
1.59 parser 354: Value& statement=params->as_junction(0, "statement must be code");
1.53 parser 355:
1.70 parser 356: ulong limit=0;
357: ulong offset=0;
358: if(params->size()>1) {
1.73 parser 359: Value& voptions=params->as_no_junction(1, "options must be hash, not code");
360: if(voptions.is_defined())
361: if(options=voptions.get_hash()) {
362: if(Value *vlimit=(Value *)options->get(*sql_limit_name))
363: limit=(ulong)r.process(*vlimit).as_double();
364: if(Value *voffset=(Value *)options->get(*sql_offset_name))
365: offset=(ulong)r.process(*voffset).as_double();
366: } else
367: PTHROW(0, 0,
368: &method_name,
369: "options must be hash");
1.70 parser 370: } else
371: options=0;
372:
1.53 parser 373: Temp_lang temp_lang(r, String::UL_SQL);
374: const String& statement_string=r.process(statement).as_string();
375: const char *statement_cstr=
376: statement_string.cstr(String::UL_UNSPECIFIED, r.connection);
1.65 parser 377: String_sql_event_handlers handlers(pool, statement_string, statement_cstr);
1.53 parser 378: bool need_rethrow=false; Exception rethrow_me;
379: PTRY {
380: r.connection->query(
1.70 parser 381: statement_cstr, offset, limit,
1.65 parser 382: handlers);
1.53 parser 383: }
384: PCATCH(e) { // query problem
385: rethrow_me=e; need_rethrow=true;
386: }
387: PEND_CATCH
388: if(need_rethrow)
389: PTHROW(rethrow_me.type(), rethrow_me.code(),
390: &statement_string, // setting more specific source [were url]
391: rethrow_me.comment());
392:
1.65 parser 393: if(!handlers.got_cell)
394: return 0; // no lines, caller should return second param[default value]
1.62 parser 395:
1.65 parser 396: return handlers.result;
1.53 parser 397: }
398:
399: static void _sql(Request& r, const String& method_name, MethodParams *params) {
400: Pool& pool=r.pool();
401:
1.70 parser 402: Hash *options;
403: const String *string=sql_result_string(r, method_name, params, options);
1.62 parser 404: if(!string) {
1.70 parser 405: if(options) {
406: if(Value *vdefault=(Value *)options->get(*sql_default_name)) {
407: if(!vdefault->get_junction())
408: PTHROW(0, 0,
409: &method_name,
410: "default option must be code");
411: string=r.process(*vdefault).get_string();
412: if(!string)
413: string=empty_string;
414: } else
415: PTHROW(0, 0,
416: &method_name,
417: "produced no result, but no default option specified");
1.68 parser 418: } else
419: PTHROW(0, 0,
420: &method_name,
1.70 parser 421: "produced no result, but no options (no default) specified");
1.62 parser 422: }
423: VString& result=*new(pool) VString(*string);
1.53 parser 424: result.set_name(method_name);
425: r.write_assign_lang(result);
426: }
427:
1.71 parser 428: static void _replace(Request& r, const String& method_name, MethodParams *params) {
429: Pool& pool=r.pool();
430: const String& src=*static_cast<VString *>(r.self)->get_string();
431:
432: Table *table=params->as_no_junction(0, "parameter must not be code").get_table();
433: if(!table)
434: PTHROW(0, 0,
435: &method_name,
436: "parameter must be table");
437:
438: Dictionary dict(*table);
439: r.write_assign_lang(*new(pool) VString(src.replace(pool, dict)));
440: }
1.41 paf 441: // constructor
442:
443: MString::MString(Pool& apool) : Methoded(apool) {
444: set_name(*NEW String(pool(), STRING_CLASS_NAME));
445:
1.9 paf 446:
1.1 paf 447: // ^string.length[]
1.41 paf 448: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 449:
1.1 paf 450: // ^string.int[]
1.72 parser 451: // ^string.int(default)
452: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);
1.1 paf 453: // ^string.double[]
1.72 parser 454: // ^string.double(default)
455: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);
1.9 paf 456:
1.24 paf 457: // ^string.format{format}
1.41 paf 458: add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 459:
1.15 paf 460: // ^string.left(n)
1.41 paf 461: add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 462: // ^string.right(n)
1.41 paf 463: add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 464: // ^string.mid(p;n)
1.41 paf 465: add_native_method("mid", Method::CT_DYNAMIC, _mid, 2, 2);
1.16 paf 466:
467: // ^string.pos[substr]
1.41 paf 468: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 469:
470: // ^string.lsplit[delim]
1.41 paf 471: add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 472: // ^string.rsplit[delim]
1.41 paf 473: add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 474:
1.32 paf 475: // ^string.match[regexp][options]
476: // ^string.match[regexp][options]{replacement-code}
1.41 paf 477: add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.49 parser 478:
479: // ^string.toupper[]
480: add_native_method("upper", Method::CT_DYNAMIC, _upper, 0, 0);
481: // ^string.tolower[]
482: add_native_method("lower", Method::CT_DYNAMIC, _lower, 0, 0);
1.53 parser 483:
1.70 parser 484: // ^sql[query]
485: // ^sql[query][$.limit(1) $.offset(2) $.default[n/a]]
1.67 parser 486: add_native_method("sql", Method::CT_STATIC, _sql, 1, 2);
1.71 parser 487:
488: // ^string.replace[table]
489: add_native_method("replace", Method::CT_DYNAMIC, _replace, 1, 1);
1.2 paf 490: }
1.1 paf 491:
1.41 paf 492: // global variable
493:
494: Methoded *string_class;
495:
496: // creator
497:
498: Methoded *MString_create(Pool& pool) {
499: return string_class=new(pool) MString(pool);
500: }
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