Annotation of parser3/src/classes/string.C, revision 1.96
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)
1.88 paf 5: Author: Alexander Petrosyan <paf@design.ru> (http://paf.design.ru)
1.24 paf 6:
1.96 ! paf 7: $Id: string.C,v 1.95 2002/02/07 11:31:53 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: // 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: int converted;
1.81 parser 45: Value *default_code=params->size()>0?
46: default_code=¶ms->as_junction(0, "default must be int"):0; // (default)
1.84 parser 47: try {
1.72 parser 48: converted=r.self->as_int();
1.84 parser 49: } catch(...) { // convert problem
50: if(!default_code) // we have a problem when no default
51: /*re*/throw;
52: else
1.81 parser 53: converted=r.process(*default_code).as_int();
1.72 parser 54: }
55:
56: Value& result=*new(pool) VInt(pool, converted);
1.47 paf 57: result.set_name(method_name);
58: r.write_no_lang(result);
1.1 paf 59: }
60:
1.72 parser 61: static void _double(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 62: Pool& pool=r.pool();
1.72 parser 63: double converted;
1.81 parser 64: Value *default_code=params->size()>0?
65: default_code=¶ms->as_junction(0, "default must be double"):0; // (default)
1.84 parser 66: try {
1.72 parser 67: converted=r.self->as_double();
1.84 parser 68: } catch(...) { // convert problem
69: if(!default_code) // we have a problem when no default
70: /*re*/throw;
71: else
1.81 parser 72: converted=r.process(*default_code).as_double();
1.72 parser 73: }
74:
75: Value& result=*new(pool) VDouble(pool, converted);
1.47 paf 76: result.set_name(method_name);
77: r.write_no_lang(result);
1.1 paf 78: }
79:
1.38 paf 80: /*not static*/void _string_format(Request& r, const String& method_name, MethodParams *params) {
1.9 paf 81: Pool& pool=r.pool();
82:
1.95 paf 83: Value& fmt_maybe_code=params->get(0);
84: // for some time due to stupid {} in original design
85: const String& fmt=
86: (fmt_maybe_code.get_junction()?r.process(fmt_maybe_code):fmt_maybe_code).as_string();
1.9 paf 87:
1.95 paf 88: char *buf=format(pool, r.self->as_double(), fmt.cstr());
1.63 parser 89:
90: String result(pool);
91: result.APPEND_CLEAN(buf, 0,
92: method_name.origin().file,
93: method_name.origin().line);
94: r.write_no_lang(result);
1.9 paf 95: }
1.11 paf 96:
1.38 paf 97: static void _left(Request& r, const String&, MethodParams *params) {
1.15 paf 98: Pool& pool=r.pool();
99:
1.78 parser 100: size_t n=(size_t)params->as_int(0, "n must be int", r);
1.15 paf 101:
102: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 103: r.write_assign_lang(*new(pool) VString(string.mid(0, n)));
1.15 paf 104: }
105:
1.38 paf 106: static void _right(Request& r, const String&, MethodParams *params) {
1.15 paf 107: Pool& pool=r.pool();
108:
1.78 parser 109: size_t n=(size_t)params->as_int(0, "n must be int", r);
1.15 paf 110:
111: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 112: r.write_assign_lang(*new(pool) VString(string.mid(string.size()-n, string.size())));
1.15 paf 113: }
114:
1.38 paf 115: static void _mid(Request& r, const String&, MethodParams *params) {
1.15 paf 116: Pool& pool=r.pool();
117:
1.83 parser 118: const String& string=*static_cast<VString *>(r.self)->get_string();
119:
1.78 parser 120: size_t p=(size_t)params->as_int(0, "p must be int", r);
1.83 parser 121: size_t n=params->size()>1?
122: (size_t)params->as_int(1, "n must be int", r):string.size();
1.15 paf 123:
1.35 paf 124: r.write_assign_lang(*new(pool) VString(string.mid(p, p+n)));
1.15 paf 125: }
126:
1.38 paf 127: static void _pos(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 128: Pool& pool=r.pool();
129:
1.59 parser 130: Value& substr=params->as_no_junction(0, "substr must not be code");
1.16 paf 131:
132: const String& string=*static_cast<VString *>(r.self)->get_string();
133: r.write_assign_lang(*new(pool) VInt(pool, string.pos(substr.as_string())));
134: }
135:
1.38 paf 136: static void split_list(Request& r, const String& method_name, MethodParams *params,
1.23 paf 137: const String& string,
138: Array& result) {
1.59 parser 139: Value& delim_value=params->as_no_junction(0, "delimiter must not be code");
1.23 paf 140:
1.45 paf 141: string.split(result, 0, delim_value.as_string());
1.19 paf 142: }
143:
1.38 paf 144: static void _lsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 145: Pool& pool=r.pool();
146: const String& string=*static_cast<VString *>(r.self)->get_string();
147:
1.61 parser 148: Array pieces(pool);
149: split_list(r, method_name, params, string, pieces);
150:
151: Array& columns=*new(pool) Array(pool);
152: columns+=new(pool) String(pool, "piece");
1.19 paf 153:
1.21 paf 154: Table& table=*new(pool) Table(pool, &string,
1.61 parser 155: &columns, pieces.size());
1.69 parser 156: Array_iter i(pieces);
157: while(i.has_next()) {
1.61 parser 158: Array& row=*new(pool) Array(pool);
1.69 parser 159: row+=i.next();
1.61 parser 160: table+=&row;
161: }
1.19 paf 162: r.write_no_lang(*new(pool) VTable(pool, &table));
163: }
164:
1.38 paf 165: static void _rsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 166: Pool& pool=r.pool();
167: const String& string=*static_cast<VString *>(r.self)->get_string();
168:
1.61 parser 169: Array pieces(pool);
170: split_list(r, method_name, params, string, pieces);
1.19 paf 171:
1.61 parser 172: Array& columns=*new(pool) Array(pool);
173: columns+=new(pool) String(pool, "piece");
1.21 paf 174:
175: Table& table=*new(pool) Table(pool, &string,
1.61 parser 176: &columns, pieces.size());
177: for(int i=pieces.size(); --i>=0; ) {
178: Array& row=*new(pool) Array(pool);
179: row+=pieces.get(i);
180: table+=&row;
181: }
1.17 paf 182:
1.19 paf 183: r.write_no_lang(*new(pool) VTable(pool, &table));
1.17 paf 184: }
185:
1.33 paf 186: static void search_action(Table& table, Array *row, int, int, void *) {
1.28 paf 187: if(row)
188: table+=row;
1.27 paf 189: }
190:
1.74 parser 191: #ifndef DOXYGEN
1.27 paf 192: struct Replace_action_info {
1.30 paf 193: Request *request; const String *origin;
1.31 paf 194: const String *src; String *dest;
1.27 paf 195: Value *replacement_code;
1.29 paf 196: const String *post_match;
1.27 paf 197: };
1.74 parser 198: #endif
1.33 paf 199: static void replace_action(Table& table, Array *row, int start, int finish,
1.31 paf 200: void *info) {
1.27 paf 201: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.31 paf 202: if(row) { // begin&middle
203: // piece from last match['start'] to beginning of this match['finish']
204: if(start!=finish)
1.37 paf 205: *ai.dest << ai.src->mid(start, finish);//ai.dest->APPEND_CONST("-");
1.51 parser 206: // store found parts in one-record VTable
1.32 paf 207: if(table.size()) // middle
208: table.put(0, row);
209: else // begin
1.30 paf 210: table+=row;
211: { // execute 'replacement_code' in 'table' context
212: VTable& vtable=*new(table.pool()) VTable(table.pool(), &table);
213: vtable.set_name(*ai.origin);
214:
215: Junction *junction=ai.replacement_code->get_junction();
1.66 parser 216: Value *saved_match_var_value=junction->root->get_element(*match_var_name);
217: junction->root->put_element(*match_var_name, &vtable);
1.30 paf 218: Value& replaced=ai.request->process(*ai.replacement_code, ai.origin, false);
1.66 parser 219: junction->root->put_element(*match_var_name, saved_match_var_value);
1.30 paf 220:
1.34 paf 221: /*
1.31 paf 222: ai.dest->APPEND_CONST("(");
1.37 paf 223: *ai.dest << *(String *)row->get(1/*match* /);
1.31 paf 224: ai.dest->APPEND_CONST(")");
1.34 paf 225: */
1.37 paf 226: *ai.dest << replaced.as_string();
1.29 paf 227: }
228: ai.post_match=(String *)row->get(2/*post_match*/);
229: } else // end
1.37 paf 230: *ai.dest << *ai.post_match;
1.27 paf 231: }
232:
1.50 parser 233: /// @todo use pcre:study somehow
1.38 paf 234: static void _match(Request& r, const String& method_name, MethodParams *params) {
1.24 paf 235: Pool& pool=r.pool();
1.28 paf 236: const String& src=*static_cast<VString *>(r.self)->get_string();
1.24 paf 237:
1.59 parser 238: Value& regexp=params->as_no_junction(0, "regexp must not be code");
1.38 paf 239:
240: const String *options=
241: params->size()>1?
1.59 parser 242: ¶ms->as_no_junction(1, "options must not be code").as_string():0;
1.24 paf 243:
1.27 paf 244: Value *result;
1.24 paf 245: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.25 paf 246: Table *table;
1.27 paf 247: if(params->size()<3) { // search
1.64 parser 248: bool was_global;
1.92 paf 249: bool matched=src.match(
1.39 paf 250: &method_name,
1.32 paf 251: regexp.as_string(), options,
1.27 paf 252: &table,
1.64 parser 253: search_action, 0,
254: &was_global);
1.60 parser 255: // matched
1.64 parser 256: // not (just matched[3=pre/match/post], no substrings) or Global search
257: if(table->columns()->size()>3 || was_global)
258: result=new(pool) VTable(pool, table); // table of pre/match/post+substrings
259: else
260: result=new(pool) VBool(pool, matched);
1.27 paf 261: } else { // replace
1.91 paf 262: Value& replacement_code=params->as_junction(2, "replacement param must be code");
1.24 paf 263:
1.28 paf 264: String& dest=*new(pool) String(pool);
1.27 paf 265: Replace_action_info replace_action_info={
1.30 paf 266: &r, &method_name,
1.31 paf 267: &src, &dest,
1.28 paf 268: &replacement_code,
1.29 paf 269: &src
1.27 paf 270: };
1.92 paf 271: src.match(
1.39 paf 272: &method_name,
1.27 paf 273: r.process(regexp).as_string(), options,
274: &table,
1.33 paf 275: replace_action, &replace_action_info);
1.28 paf 276: result=new(pool) VString(dest);
1.27 paf 277: }
1.26 paf 278: result->set_name(method_name);
1.34 paf 279: r.write_assign_lang(*result);
1.24 paf 280: }
281:
1.49 parser 282: static void change_case(Request& r, const String& method_name, MethodParams *params,
283: String::Change_case_kind kind) {
284: Pool& pool=r.pool();
285: const String& src=*static_cast<VString *>(r.self)->get_string();
286:
1.92 paf 287: r.write_assign_lang(*new(pool) VString(src.change_case(pool,
1.49 parser 288: kind)));
289: }
290: static void _upper(Request& r, const String& method_name, MethodParams *params) {
291: change_case(r, method_name, params, String::CC_UPPER);
292: }
293: static void _lower(Request& r, const String& method_name, MethodParams *params) {
294: change_case(r, method_name, params, String::CC_LOWER);
295: }
296:
1.65 parser 297: #ifndef DOXYGEN
298: class String_sql_event_handlers : public SQL_Driver_query_event_handlers {
299: public:
300: String_sql_event_handlers(Pool& apool,
301: const String& astatement_string, const char *astatement_cstr) :
302: pool(apool),
303: statement_string(astatement_string),
304: statement_cstr(astatement_cstr),
305: got_column(false), got_cell(false) {
306: result=new(pool) String(pool);
307: }
308:
309: void add_column(void *ptr, size_t size) {
310: if(got_column)
1.84 parser 311: throw Exception(0, 0,
1.65 parser 312: &statement_string,
313: "result must contain exactly one column");
314: got_column=true;
315: }
316: void before_rows() { /* ignore */ }
317: void add_row() { /* ignore */ }
318: void add_row_cell(void *ptr, size_t size) {
319: if(got_cell)
1.84 parser 320: throw Exception(0, 0,
1.65 parser 321: &statement_string,
322: "result must not contain more then one row");
323: got_cell=true;
324:
325: result->APPEND_TAINTED((const char *)ptr, size, statement_cstr, 0);
326: }
327:
328: private:
329: Pool& pool;
330: const String& statement_string; const char *statement_cstr;
331: bool got_column;
332: public:
333: bool got_cell;
334: String *result;
335: };
336: #endif
1.70 parser 337: const String* sql_result_string(Request& r, const String& method_name, MethodParams *params,
1.81 parser 338: Hash *& options, Value *& default_code) {
1.53 parser 339: Pool& pool=r.pool();
340:
1.59 parser 341: Value& statement=params->as_junction(0, "statement must be code");
1.53 parser 342:
1.70 parser 343: ulong limit=0;
344: ulong offset=0;
1.81 parser 345: default_code=0;
1.70 parser 346: if(params->size()>1) {
1.73 parser 347: Value& voptions=params->as_no_junction(1, "options must be hash, not code");
348: if(voptions.is_defined())
1.85 parser 349: if(options=voptions.get_hash(&method_name)) {
1.73 parser 350: if(Value *vlimit=(Value *)options->get(*sql_limit_name))
351: limit=(ulong)r.process(*vlimit).as_double();
352: if(Value *voffset=(Value *)options->get(*sql_offset_name))
353: offset=(ulong)r.process(*voffset).as_double();
1.81 parser 354: if(default_code=(Value *)options->get(*sql_default_name)) {
355: if(!default_code->get_junction())
1.84 parser 356: throw Exception(0, 0,
1.81 parser 357: &method_name,
358: "default option must be code");
359: }
1.73 parser 360: } else
1.84 parser 361: throw Exception(0, 0,
1.73 parser 362: &method_name,
363: "options must be hash");
1.70 parser 364: } else
365: options=0;
366:
1.53 parser 367: Temp_lang temp_lang(r, String::UL_SQL);
368: const String& statement_string=r.process(statement).as_string();
369: const char *statement_cstr=
1.93 paf 370: statement_string.cstr(String::UL_UNSPECIFIED, r.connection(&method_name));
1.65 parser 371: String_sql_event_handlers handlers(pool, statement_string, statement_cstr);
1.84 parser 372: try {
1.93 paf 373: r.connection(&method_name)->query(
1.70 parser 374: statement_cstr, offset, limit,
1.65 parser 375: handlers);
1.84 parser 376: } catch(const Exception& e) { // query problem
377: // give more specific source [were url]
378: throw Exception(e.type(), e.code(),
379: &statement_string,
380: "%s", e.comment());
1.53 parser 381: }
382:
1.65 parser 383: if(!handlers.got_cell)
384: return 0; // no lines, caller should return second param[default value]
1.62 parser 385:
1.65 parser 386: return handlers.result;
1.53 parser 387: }
388:
389: static void _sql(Request& r, const String& method_name, MethodParams *params) {
390: Pool& pool=r.pool();
391:
1.70 parser 392: Hash *options;
1.81 parser 393: Value *default_code;
394: const String *string=sql_result_string(r, method_name, params, options, default_code);
1.62 parser 395: if(!string) {
1.81 parser 396: if(default_code) {
397: string=r.process(*default_code).get_string();
398: if(!string)
399: string=new(pool) String(pool);
1.68 parser 400: } else
1.84 parser 401: throw Exception(0, 0,
1.68 parser 402: &method_name,
1.81 parser 403: "produced no result, but no default option specified");
1.62 parser 404: }
405: VString& result=*new(pool) VString(*string);
1.53 parser 406: result.set_name(method_name);
407: r.write_assign_lang(result);
408: }
409:
1.71 parser 410: static void _replace(Request& r, const String& method_name, MethodParams *params) {
411: Pool& pool=r.pool();
412: const String& src=*static_cast<VString *>(r.self)->get_string();
413:
414: Table *table=params->as_no_junction(0, "parameter must not be code").get_table();
415: if(!table)
1.84 parser 416: throw Exception(0, 0,
1.71 parser 417: &method_name,
418: "parameter must be table");
419:
420: Dictionary dict(*table);
421: r.write_assign_lang(*new(pool) VString(src.replace(pool, dict)));
422: }
1.79 parser 423:
424: static void _save(Request& r, const String& method_name, MethodParams *params) {
1.87 paf 425: const String& file_name=params->as_string(params->size()-1,
426: "file name must be string");
1.79 parser 427:
428: const String& src=*static_cast<VString *>(r.self)->get_string();
429:
1.87 paf 430: bool do_append=false;
431: if(params->size()>1) {
432: const String& mode=params->as_string(0, "mode must be string");
433: if(mode=="append")
434: do_append=true;
435: else
436: throw Exception(0, 0,
437: &mode,
438: "unknown mode, must be 'append'");
439: }
440:
1.79 parser 441: // write
1.89 paf 442: const char *buf=src.cstr(String::UL_UNSPECIFIED);
1.94 paf 443: file_write(r.absolute(file_name),
1.89 paf 444: buf, strlen(buf), true, do_append);
1.79 parser 445: }
446:
1.41 paf 447: // constructor
448:
449: MString::MString(Pool& apool) : Methoded(apool) {
450: set_name(*NEW String(pool(), STRING_CLASS_NAME));
451:
1.9 paf 452:
1.1 paf 453: // ^string.length[]
1.41 paf 454: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 455:
1.1 paf 456: // ^string.int[]
1.72 parser 457: // ^string.int(default)
458: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);
1.1 paf 459: // ^string.double[]
1.72 parser 460: // ^string.double(default)
461: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);
1.9 paf 462:
1.24 paf 463: // ^string.format{format}
1.41 paf 464: add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 465:
1.15 paf 466: // ^string.left(n)
1.41 paf 467: add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 468: // ^string.right(n)
1.41 paf 469: add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 470: // ^string.mid(p;n)
1.82 parser 471: add_native_method("mid", Method::CT_DYNAMIC, _mid, 1, 2);
1.16 paf 472:
473: // ^string.pos[substr]
1.41 paf 474: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 475:
476: // ^string.lsplit[delim]
1.41 paf 477: add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 478: // ^string.rsplit[delim]
1.41 paf 479: add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 480:
1.32 paf 481: // ^string.match[regexp][options]
482: // ^string.match[regexp][options]{replacement-code}
1.41 paf 483: add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.49 parser 484:
485: // ^string.toupper[]
486: add_native_method("upper", Method::CT_DYNAMIC, _upper, 0, 0);
487: // ^string.tolower[]
488: add_native_method("lower", Method::CT_DYNAMIC, _lower, 0, 0);
1.53 parser 489:
1.70 parser 490: // ^sql[query]
491: // ^sql[query][$.limit(1) $.offset(2) $.default[n/a]]
1.67 parser 492: add_native_method("sql", Method::CT_STATIC, _sql, 1, 2);
1.71 parser 493:
494: // ^string.replace[table]
495: add_native_method("replace", Method::CT_DYNAMIC, _replace, 1, 1);
1.79 parser 496:
497: // ^string.save[file]
1.87 paf 498: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 2);
1.2 paf 499: }
1.1 paf 500:
1.41 paf 501: // global variable
502:
503: Methoded *string_class;
504:
505: // creator
506:
507: Methoded *MString_create(Pool& pool) {
508: return string_class=new(pool) MString(pool);
509: }
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