Annotation of parser3/src/classes/string.C, revision 1.70
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: */
1.70 ! parser 8: static const char *RCSId="$Id: string.C,v 1.69 2001/08/02 09:58:33 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"
1.1 paf 18:
1.41 paf 19: // defines
1.1 paf 20:
1.41 paf 21: #define STRING_CLASS_NAME "string"
22:
23: // class
24:
25: class MString : public Methoded {
26: public:
27: MString(Pool& pool);
1.44 paf 28: public: // Methoded
1.53 parser 29: bool used_directly() { return true; }
1.41 paf 30: };
1.1 paf 31:
32: // methods
33:
1.47 paf 34: static void _length(Request& r, const String& method_name, MethodParams *) {
1.1 paf 35: Pool& pool=r.pool();
1.47 paf 36: Value& result=*new(pool) VDouble(pool, r.self->get_string()->size());
37: result.set_name(method_name);
38: r.write_no_lang(result);
1.1 paf 39: }
40:
1.47 paf 41: static void _int(Request& r, const String& method_name, MethodParams *) {
1.1 paf 42: Pool& pool=r.pool();
1.48 parser 43: Value& result=*new(pool) VInt(pool, r.self->as_int());
1.47 paf 44: result.set_name(method_name);
45: r.write_no_lang(result);
1.1 paf 46: }
47:
1.47 paf 48: static void _double(Request& r, const String& method_name, MethodParams *) {
1.1 paf 49: Pool& pool=r.pool();
1.47 paf 50: Value& result=*new(pool) VDouble(pool, r.self->as_double());
51: result.set_name(method_name);
52: r.write_no_lang(result);
1.1 paf 53: }
54:
1.38 paf 55: /*not static*/void _string_format(Request& r, const String& method_name, MethodParams *params) {
1.9 paf 56: Pool& pool=r.pool();
57:
1.59 parser 58: Value& fmt=params->as_junction(0, "fmt must be code");
1.9 paf 59:
1.24 paf 60: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
61: char *buf=format(pool, r.self->as_double(), r.process(fmt).as_string().cstr());
1.63 parser 62:
63: String result(pool);
64: result.APPEND_CLEAN(buf, 0,
65: method_name.origin().file,
66: method_name.origin().line);
67: r.write_no_lang(result);
1.9 paf 68: }
1.11 paf 69:
1.38 paf 70: static void _left(Request& r, const String&, MethodParams *params) {
1.15 paf 71: Pool& pool=r.pool();
72:
1.38 paf 73: size_t n=(size_t)r.process(params->get(0)).as_double();
1.15 paf 74:
75: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 76: r.write_assign_lang(*new(pool) VString(string.mid(0, n)));
1.15 paf 77: }
78:
1.38 paf 79: static void _right(Request& r, const String&, MethodParams *params) {
1.15 paf 80: Pool& pool=r.pool();
81:
1.38 paf 82: size_t n=(size_t)r.process(params->get(0)).as_double();
1.15 paf 83:
84: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 85: r.write_assign_lang(*new(pool) VString(string.mid(string.size()-n, string.size())));
1.15 paf 86: }
87:
1.38 paf 88: static void _mid(Request& r, const String&, MethodParams *params) {
1.15 paf 89: Pool& pool=r.pool();
90:
1.38 paf 91: size_t p=(size_t)r.process(params->get(0)).as_double();
92: size_t n=(size_t)r.process(params->get(1)).as_double();
1.15 paf 93:
94: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 95: r.write_assign_lang(*new(pool) VString(string.mid(p, p+n)));
1.15 paf 96: }
97:
1.38 paf 98: static void _pos(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 99: Pool& pool=r.pool();
100:
1.59 parser 101: Value& substr=params->as_no_junction(0, "substr must not be code");
1.16 paf 102:
103: const String& string=*static_cast<VString *>(r.self)->get_string();
104: r.write_assign_lang(*new(pool) VInt(pool, string.pos(substr.as_string())));
105: }
106:
1.38 paf 107: static void split_list(Request& r, const String& method_name, MethodParams *params,
1.23 paf 108: const String& string,
109: Array& result) {
1.59 parser 110: Value& delim_value=params->as_no_junction(0, "delimiter must not be code");
1.23 paf 111:
1.45 paf 112: string.split(result, 0, delim_value.as_string());
1.19 paf 113: }
114:
1.38 paf 115: static void _lsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 116: Pool& pool=r.pool();
117: const String& string=*static_cast<VString *>(r.self)->get_string();
118:
1.61 parser 119: Array pieces(pool);
120: split_list(r, method_name, params, string, pieces);
121:
122: Array& columns=*new(pool) Array(pool);
123: columns+=new(pool) String(pool, "piece");
1.19 paf 124:
1.21 paf 125: Table& table=*new(pool) Table(pool, &string,
1.61 parser 126: &columns, pieces.size());
1.69 parser 127: Array_iter i(pieces);
128: while(i.has_next()) {
1.61 parser 129: Array& row=*new(pool) Array(pool);
1.69 parser 130: row+=i.next();
1.61 parser 131: table+=&row;
132: }
1.19 paf 133: r.write_no_lang(*new(pool) VTable(pool, &table));
134: }
135:
1.38 paf 136: static void _rsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 137: Pool& pool=r.pool();
138: const String& string=*static_cast<VString *>(r.self)->get_string();
139:
1.61 parser 140: Array pieces(pool);
141: split_list(r, method_name, params, string, pieces);
1.19 paf 142:
1.61 parser 143: Array& columns=*new(pool) Array(pool);
144: columns+=new(pool) String(pool, "piece");
1.21 paf 145:
146: Table& table=*new(pool) Table(pool, &string,
1.61 parser 147: &columns, pieces.size());
148: for(int i=pieces.size(); --i>=0; ) {
149: Array& row=*new(pool) Array(pool);
150: row+=pieces.get(i);
151: table+=&row;
152: }
1.17 paf 153:
1.19 paf 154: r.write_no_lang(*new(pool) VTable(pool, &table));
1.17 paf 155: }
156:
1.33 paf 157: static void search_action(Table& table, Array *row, int, int, void *) {
1.28 paf 158: if(row)
159: table+=row;
1.27 paf 160: }
161:
1.40 paf 162: /// used by string: _match / replace_action
1.27 paf 163: struct Replace_action_info {
1.30 paf 164: Request *request; const String *origin;
1.31 paf 165: const String *src; String *dest;
1.27 paf 166: Value *replacement_code;
1.29 paf 167: const String *post_match;
1.27 paf 168: };
1.33 paf 169: static void replace_action(Table& table, Array *row, int start, int finish,
1.31 paf 170: void *info) {
1.27 paf 171: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.31 paf 172: if(row) { // begin&middle
173: // piece from last match['start'] to beginning of this match['finish']
174: if(start!=finish)
1.37 paf 175: *ai.dest << ai.src->mid(start, finish);//ai.dest->APPEND_CONST("-");
1.51 parser 176: // store found parts in one-record VTable
1.32 paf 177: if(table.size()) // middle
178: table.put(0, row);
179: else // begin
1.30 paf 180: table+=row;
181: { // execute 'replacement_code' in 'table' context
182: VTable& vtable=*new(table.pool()) VTable(table.pool(), &table);
183: vtable.set_name(*ai.origin);
184:
185: Junction *junction=ai.replacement_code->get_junction();
1.66 parser 186: Value *saved_match_var_value=junction->root->get_element(*match_var_name);
187: junction->root->put_element(*match_var_name, &vtable);
1.30 paf 188: Value& replaced=ai.request->process(*ai.replacement_code, ai.origin, false);
1.66 parser 189: junction->root->put_element(*match_var_name, saved_match_var_value);
1.30 paf 190:
1.34 paf 191: /*
1.31 paf 192: ai.dest->APPEND_CONST("(");
1.37 paf 193: *ai.dest << *(String *)row->get(1/*match* /);
1.31 paf 194: ai.dest->APPEND_CONST(")");
1.34 paf 195: */
1.37 paf 196: *ai.dest << replaced.as_string();
1.29 paf 197: }
198: ai.post_match=(String *)row->get(2/*post_match*/);
199: } else // end
1.37 paf 200: *ai.dest << *ai.post_match;
1.27 paf 201: }
202:
1.50 parser 203: /// @todo use pcre:study somehow
1.38 paf 204: static void _match(Request& r, const String& method_name, MethodParams *params) {
1.24 paf 205: Pool& pool=r.pool();
1.28 paf 206: const String& src=*static_cast<VString *>(r.self)->get_string();
1.24 paf 207:
1.59 parser 208: Value& regexp=params->as_no_junction(0, "regexp must not be code");
1.38 paf 209:
210: const String *options=
211: params->size()>1?
1.59 parser 212: ¶ms->as_no_junction(1, "options must not be code").as_string():0;
1.24 paf 213:
1.27 paf 214: Value *result;
1.24 paf 215: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.25 paf 216: Table *table;
1.27 paf 217: if(params->size()<3) { // search
1.64 parser 218: bool was_global;
1.60 parser 219: bool matched=src.match(r.pcre_tables,
1.39 paf 220: &method_name,
1.32 paf 221: regexp.as_string(), options,
1.27 paf 222: &table,
1.64 parser 223: search_action, 0,
224: &was_global);
1.60 parser 225: // matched
1.64 parser 226: // not (just matched[3=pre/match/post], no substrings) or Global search
227: if(table->columns()->size()>3 || was_global)
228: result=new(pool) VTable(pool, table); // table of pre/match/post+substrings
229: else
230: result=new(pool) VBool(pool, matched);
1.27 paf 231: } else { // replace
1.59 parser 232: Value& replacement_code=params->as_junction(2, "replacement code must be code");
1.24 paf 233:
1.28 paf 234: String& dest=*new(pool) String(pool);
1.27 paf 235: Replace_action_info replace_action_info={
1.30 paf 236: &r, &method_name,
1.31 paf 237: &src, &dest,
1.28 paf 238: &replacement_code,
1.29 paf 239: &src
1.27 paf 240: };
1.39 paf 241: src.match(r.pcre_tables,
242: &method_name,
1.27 paf 243: r.process(regexp).as_string(), options,
244: &table,
1.33 paf 245: replace_action, &replace_action_info);
1.28 paf 246: result=new(pool) VString(dest);
1.27 paf 247: }
1.26 paf 248: result->set_name(method_name);
1.34 paf 249: r.write_assign_lang(*result);
1.24 paf 250: }
251:
1.49 parser 252: static void change_case(Request& r, const String& method_name, MethodParams *params,
253: String::Change_case_kind kind) {
254: Pool& pool=r.pool();
255: const String& src=*static_cast<VString *>(r.self)->get_string();
256:
257: r.write_assign_lang(*new(pool) VString(src.change_case(pool, r.pcre_tables,
258: kind)));
259: }
260: static void _upper(Request& r, const String& method_name, MethodParams *params) {
261: change_case(r, method_name, params, String::CC_UPPER);
262: }
263: static void _lower(Request& r, const String& method_name, MethodParams *params) {
264: change_case(r, method_name, params, String::CC_LOWER);
265: }
266:
1.65 parser 267: #ifndef DOXYGEN
268: class String_sql_event_handlers : public SQL_Driver_query_event_handlers {
269: public:
270: String_sql_event_handlers(Pool& apool,
271: const String& astatement_string, const char *astatement_cstr) :
272: pool(apool),
273: statement_string(astatement_string),
274: statement_cstr(astatement_cstr),
275: got_column(false), got_cell(false) {
276: result=new(pool) String(pool);
277: }
278:
279: void add_column(void *ptr, size_t size) {
280: if(got_column)
281: PTHROW(0, 0,
282: &statement_string,
283: "result must contain exactly one column");
284: got_column=true;
285: }
286: void before_rows() { /* ignore */ }
287: void add_row() { /* ignore */ }
288: void add_row_cell(void *ptr, size_t size) {
289: if(got_cell)
290: PTHROW(0, 0,
291: &statement_string,
292: "result must not contain more then one row");
293: got_cell=true;
294:
295: result->APPEND_TAINTED((const char *)ptr, size, statement_cstr, 0);
296: }
297:
298: private:
299: Pool& pool;
300: const String& statement_string; const char *statement_cstr;
301: bool got_column;
302: public:
303: bool got_cell;
304: String *result;
305: };
306: #endif
1.70 ! parser 307: const String* sql_result_string(Request& r, const String& method_name, MethodParams *params,
! 308: Hash *&options) {
1.53 parser 309: Pool& pool=r.pool();
310:
311: if(!r.connection)
312: PTHROW(0, 0,
313: &method_name,
314: "without connect");
315:
1.59 parser 316: Value& statement=params->as_junction(0, "statement must be code");
1.53 parser 317:
1.70 ! parser 318: ulong limit=0;
! 319: ulong offset=0;
! 320: if(params->size()>1) {
! 321: Value& options_param=params->as_no_junction(1, "options must be hash, not code");
! 322: if(options=options_param.get_hash()) {
! 323: if(Value *vlimit=(Value *)options->get(*sql_limit_name))
! 324: limit=(ulong)r.process(*vlimit).as_double();
! 325: if(Value *voffset=(Value *)options->get(*sql_offset_name))
! 326: offset=(ulong)r.process(*voffset).as_double();
! 327: } else
! 328: PTHROW(0, 0,
! 329: &method_name,
! 330: "options must be hash");
! 331: } else
! 332: options=0;
! 333:
1.53 parser 334: Temp_lang temp_lang(r, String::UL_SQL);
335: const String& statement_string=r.process(statement).as_string();
336: const char *statement_cstr=
337: statement_string.cstr(String::UL_UNSPECIFIED, r.connection);
1.65 parser 338: String_sql_event_handlers handlers(pool, statement_string, statement_cstr);
1.53 parser 339: bool need_rethrow=false; Exception rethrow_me;
340: PTRY {
341: r.connection->query(
1.70 ! parser 342: statement_cstr, offset, limit,
1.65 parser 343: handlers);
1.53 parser 344: }
345: PCATCH(e) { // query problem
346: rethrow_me=e; need_rethrow=true;
347: }
348: PEND_CATCH
349: if(need_rethrow)
350: PTHROW(rethrow_me.type(), rethrow_me.code(),
351: &statement_string, // setting more specific source [were url]
352: rethrow_me.comment());
353:
1.65 parser 354: if(!handlers.got_cell)
355: return 0; // no lines, caller should return second param[default value]
1.62 parser 356:
1.65 parser 357: return handlers.result;
1.53 parser 358: }
359:
360: static void _sql(Request& r, const String& method_name, MethodParams *params) {
361: Pool& pool=r.pool();
362:
1.70 ! parser 363: Hash *options;
! 364: const String *string=sql_result_string(r, method_name, params, options);
1.62 parser 365: if(!string) {
1.70 ! parser 366: if(options) {
! 367: if(Value *vdefault=(Value *)options->get(*sql_default_name)) {
! 368: if(!vdefault->get_junction())
! 369: PTHROW(0, 0,
! 370: &method_name,
! 371: "default option must be code");
! 372: string=r.process(*vdefault).get_string();
! 373: if(!string)
! 374: string=empty_string;
! 375: } else
! 376: PTHROW(0, 0,
! 377: &method_name,
! 378: "produced no result, but no default option specified");
1.68 parser 379: } else
380: PTHROW(0, 0,
381: &method_name,
1.70 ! parser 382: "produced no result, but no options (no default) specified");
1.62 parser 383: }
384: VString& result=*new(pool) VString(*string);
1.53 parser 385: result.set_name(method_name);
386: r.write_assign_lang(result);
387: }
388:
1.41 paf 389: // constructor
390:
391: MString::MString(Pool& apool) : Methoded(apool) {
392: set_name(*NEW String(pool(), STRING_CLASS_NAME));
393:
1.9 paf 394:
1.1 paf 395: // ^string.length[]
1.41 paf 396: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 397:
1.1 paf 398: // ^string.int[]
1.41 paf 399: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 0);
1.6 paf 400:
1.1 paf 401: // ^string.double[]
1.41 paf 402: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 0);
1.9 paf 403:
1.24 paf 404: // ^string.format{format}
1.41 paf 405: add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 406:
1.15 paf 407: // ^string.left(n)
1.41 paf 408: add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 409: // ^string.right(n)
1.41 paf 410: add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 411: // ^string.mid(p;n)
1.41 paf 412: add_native_method("mid", Method::CT_DYNAMIC, _mid, 2, 2);
1.16 paf 413:
414: // ^string.pos[substr]
1.41 paf 415: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 416:
417: // ^string.lsplit[delim]
1.41 paf 418: add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 419: // ^string.rsplit[delim]
1.41 paf 420: add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 421:
1.32 paf 422: // ^string.match[regexp][options]
423: // ^string.match[regexp][options]{replacement-code}
1.41 paf 424: add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.49 parser 425:
426: // ^string.toupper[]
427: add_native_method("upper", Method::CT_DYNAMIC, _upper, 0, 0);
428: // ^string.tolower[]
429: add_native_method("lower", Method::CT_DYNAMIC, _lower, 0, 0);
1.53 parser 430:
1.70 ! parser 431: // ^sql[query]
! 432: // ^sql[query][$.limit(1) $.offset(2) $.default[n/a]]
1.67 parser 433: add_native_method("sql", Method::CT_STATIC, _sql, 1, 2);
1.2 paf 434: }
1.1 paf 435:
1.41 paf 436: // global variable
437:
438: Methoded *string_class;
439:
440: // creator
441:
442: Methoded *MString_create(Pool& pool) {
443: return string_class=new(pool) MString(pool);
444: }
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