Annotation of parser3/src/classes/string.C, revision 1.53
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)
1.4 paf 7:
1.53 ! parser 8: $Id: string.C,v 1.52 2001/05/19 18:35:40 parser Exp $
1.1 paf 9: */
10:
1.43 paf 11: #include "classes.h"
1.1 paf 12: #include "pa_request.h"
13: #include "pa_vdouble.h"
14: #include "pa_vint.h"
1.17 paf 15: #include "pa_vtable.h"
1.25 paf 16: #include "pa_vbool.h"
1.27 paf 17: #include "pa_string.h"
1.53 ! parser 18: #include "pa_sql_connection.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 {
1.53 ! parser 27: public: // VStateless_class
! 28: Value *create_new_value(Pool& pool) { return new(pool) VString(pool); }
! 29:
1.41 paf 30: public:
31: MString(Pool& pool);
1.44 paf 32: public: // Methoded
1.53 ! parser 33: bool used_directly() { return true; }
1.41 paf 34: };
1.1 paf 35:
36: // methods
37:
1.47 paf 38: static void _length(Request& r, const String& method_name, MethodParams *) {
1.1 paf 39: Pool& pool=r.pool();
1.47 paf 40: Value& result=*new(pool) VDouble(pool, r.self->get_string()->size());
41: result.set_name(method_name);
42: r.write_no_lang(result);
1.1 paf 43: }
44:
1.47 paf 45: static void _int(Request& r, const String& method_name, MethodParams *) {
1.1 paf 46: Pool& pool=r.pool();
1.48 parser 47: Value& result=*new(pool) VInt(pool, r.self->as_int());
1.47 paf 48: result.set_name(method_name);
49: r.write_no_lang(result);
1.1 paf 50: }
51:
1.47 paf 52: static void _double(Request& r, const String& method_name, MethodParams *) {
1.1 paf 53: Pool& pool=r.pool();
1.47 paf 54: Value& result=*new(pool) VDouble(pool, r.self->as_double());
55: result.set_name(method_name);
56: r.write_no_lang(result);
1.1 paf 57: }
58:
1.38 paf 59: /*not static*/void _string_format(Request& r, const String& method_name, MethodParams *params) {
1.9 paf 60: Pool& pool=r.pool();
61:
1.38 paf 62: Value& fmt=params->get_junction(0, "fmt must be code");
1.9 paf 63:
1.24 paf 64: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
65: char *buf=format(pool, r.self->as_double(), r.process(fmt).as_string().cstr());
1.9 paf 66:
1.12 paf 67: r.write_no_lang(String(pool, buf));
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:
1.38 paf 101: Value& substr=params->get_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) {
1.38 paf 110: Value& delim_value=params->get_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:
1.21 paf 119: Array& row=*new(pool) Array(pool);
120: split_list(r, method_name, params, string, row);
1.19 paf 121:
1.21 paf 122: Table& table=*new(pool) Table(pool, &string,
123: 0/*nameless*/, 1/*row preallocate(and only)*/);
124: table+=&row;
1.19 paf 125:
126: r.write_no_lang(*new(pool) VTable(pool, &table));
127: }
128:
1.38 paf 129: static void _rsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 130: Pool& pool=r.pool();
131: const String& string=*static_cast<VString *>(r.self)->get_string();
132:
133: Array list(pool);
134: split_list(r, method_name, params, string, list);
135:
1.21 paf 136: Array& row=*new(pool) Array(pool);
137: for(int i=list.size(); --i>=0; )
138: row+=list.get(i);
139:
140: Table& table=*new(pool) Table(pool, &string,
141: 0/*nameless*/, 1/*row preallocate(and only)*/);
142: table+=&row;
1.17 paf 143:
1.19 paf 144: r.write_no_lang(*new(pool) VTable(pool, &table));
1.17 paf 145: }
146:
1.33 paf 147: static void search_action(Table& table, Array *row, int, int, void *) {
1.28 paf 148: if(row)
149: table+=row;
1.27 paf 150: }
151:
1.40 paf 152: /// used by string: _match / replace_action
1.27 paf 153: struct Replace_action_info {
1.30 paf 154: Request *request; const String *origin;
1.31 paf 155: const String *src; String *dest;
1.27 paf 156: Value *replacement_code;
1.29 paf 157: const String *post_match;
1.27 paf 158: };
1.33 paf 159: static void replace_action(Table& table, Array *row, int start, int finish,
1.31 paf 160: void *info) {
1.27 paf 161: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.31 paf 162: if(row) { // begin&middle
163: // piece from last match['start'] to beginning of this match['finish']
164: if(start!=finish)
1.37 paf 165: *ai.dest << ai.src->mid(start, finish);//ai.dest->APPEND_CONST("-");
1.51 parser 166: // store found parts in one-record VTable
1.32 paf 167: if(table.size()) // middle
168: table.put(0, row);
169: else // begin
1.30 paf 170: table+=row;
171: { // execute 'replacement_code' in 'table' context
172: VTable& vtable=*new(table.pool()) VTable(table.pool(), &table);
173: vtable.set_name(*ai.origin);
174:
175: Junction *junction=ai.replacement_code->get_junction();
1.52 parser 176: junction->rcontext=/*must be some way to get to
177: outside world junction->root=*/&vtable;
1.30 paf 178: Value& replaced=ai.request->process(*ai.replacement_code, ai.origin, false);
179:
1.34 paf 180: /*
1.31 paf 181: ai.dest->APPEND_CONST("(");
1.37 paf 182: *ai.dest << *(String *)row->get(1/*match* /);
1.31 paf 183: ai.dest->APPEND_CONST(")");
1.34 paf 184: */
1.37 paf 185: *ai.dest << replaced.as_string();
1.29 paf 186: }
187: ai.post_match=(String *)row->get(2/*post_match*/);
188: } else // end
1.37 paf 189: *ai.dest << *ai.post_match;
1.27 paf 190: }
191:
1.50 parser 192: /// @todo use pcre:study somehow
1.38 paf 193: static void _match(Request& r, const String& method_name, MethodParams *params) {
1.24 paf 194: Pool& pool=r.pool();
1.28 paf 195: const String& src=*static_cast<VString *>(r.self)->get_string();
1.24 paf 196:
1.38 paf 197: Value& regexp=params->get_no_junction(0, "regexp must not be code");
198:
199: const String *options=
200: params->size()>1?
201: ¶ms->get_no_junction(1, "options must not be code").as_string():0;
1.24 paf 202:
1.27 paf 203: Value *result;
1.24 paf 204: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.25 paf 205: Table *table;
1.27 paf 206: if(params->size()<3) { // search
1.39 paf 207: if(src.match(r.pcre_tables,
208: &method_name,
1.32 paf 209: regexp.as_string(), options,
1.27 paf 210: &table,
1.33 paf 211: search_action, 0)) {
1.27 paf 212: // matched
213: if(table->columns()->size()==3 && // just matched[3=pre/match/post], no substrings
214: table->size()==1) // just one row, not /g_lobal search
215: result=new(pool) VBool(pool, true);
216: else // table of pre/match/post+substrings
217: result=new(pool) VTable(pool, table);
218: } else // not matched [not global]
219: result=new(pool) VBool(pool, false);
220: } else { // replace
1.38 paf 221: Value& replacement_code=params->get_junction(2, "replacement code must be code");
1.24 paf 222:
1.28 paf 223: String& dest=*new(pool) String(pool);
1.27 paf 224: Replace_action_info replace_action_info={
1.30 paf 225: &r, &method_name,
1.31 paf 226: &src, &dest,
1.28 paf 227: &replacement_code,
1.29 paf 228: &src
1.27 paf 229: };
1.39 paf 230: src.match(r.pcre_tables,
231: &method_name,
1.27 paf 232: r.process(regexp).as_string(), options,
233: &table,
1.33 paf 234: replace_action, &replace_action_info);
1.28 paf 235: result=new(pool) VString(dest);
1.27 paf 236: }
1.26 paf 237: result->set_name(method_name);
1.34 paf 238: r.write_assign_lang(*result);
1.24 paf 239: }
240:
1.49 parser 241: static void change_case(Request& r, const String& method_name, MethodParams *params,
242: String::Change_case_kind kind) {
243: Pool& pool=r.pool();
244: const String& src=*static_cast<VString *>(r.self)->get_string();
245:
246: r.write_assign_lang(*new(pool) VString(src.change_case(pool, r.pcre_tables,
247: kind)));
248: }
249: static void _upper(Request& r, const String& method_name, MethodParams *params) {
250: change_case(r, method_name, params, String::CC_UPPER);
251: }
252: static void _lower(Request& r, const String& method_name, MethodParams *params) {
253: change_case(r, method_name, params, String::CC_LOWER);
254: }
255:
1.53 ! parser 256: String& sql_result_string(Request& r, const String& method_name, MethodParams *params) {
! 257: Pool& pool=r.pool();
! 258:
! 259: if(!r.connection)
! 260: PTHROW(0, 0,
! 261: &method_name,
! 262: "without connect");
! 263:
! 264: Value& statement=params->get_junction(0, "statement must be code");
! 265:
! 266: ulong offset=0;
! 267: if(params->size()>1) {
! 268: Value& offset_code=params->get_junction(1, "offset must be expression");
! 269: offset=(ulong)r.process(offset_code).as_double();
! 270: }
! 271:
! 272: Temp_lang temp_lang(r, String::UL_SQL);
! 273: const String& statement_string=r.process(statement).as_string();
! 274: const char *statement_cstr=
! 275: statement_string.cstr(String::UL_UNSPECIFIED, r.connection);
! 276: unsigned int sql_column_count; SQL_Driver::Cell *sql_columns;
! 277: unsigned long sql_row_count; SQL_Driver::Cell **sql_rows;
! 278: bool need_rethrow=false; Exception rethrow_me;
! 279: PTRY {
! 280: r.connection->query(
! 281: statement_cstr, offset, 0,
! 282: &sql_column_count, &sql_columns,
! 283: &sql_row_count, &sql_rows);
! 284: }
! 285: PCATCH(e) { // query problem
! 286: rethrow_me=e; need_rethrow=true;
! 287: }
! 288: PEND_CATCH
! 289: if(need_rethrow)
! 290: PTHROW(rethrow_me.type(), rethrow_me.code(),
! 291: &statement_string, // setting more specific source [were url]
! 292: rethrow_me.comment());
! 293:
! 294: if(sql_column_count!=1)
! 295: PTHROW(0, 0,
! 296: &statement_string,
! 297: "result must contain only one column");
! 298:
! 299: if(sql_row_count!=1)
! 300: PTHROW(0, 0,
! 301: &statement_string,
! 302: "result must contain only one row");
! 303:
! 304: String& result=*new(pool) String(pool);
! 305: SQL_Driver::Cell& cell=sql_rows[0][0];
! 306: result.APPEND_TAINTED(
! 307: (const char *)cell.ptr, cell.size,
! 308: statement_cstr, 0);
! 309:
! 310: return result;
! 311: }
! 312:
! 313: static void _sql(Request& r, const String& method_name, MethodParams *params) {
! 314: Pool& pool=r.pool();
! 315:
! 316: VString& result=*new(pool) VString(sql_result_string(r, method_name, params));
! 317: result.set_name(method_name);
! 318: r.write_assign_lang(result);
! 319: }
! 320:
1.41 paf 321: // constructor
322:
323: MString::MString(Pool& apool) : Methoded(apool) {
324: set_name(*NEW String(pool(), STRING_CLASS_NAME));
325:
1.9 paf 326:
1.1 paf 327: // ^string.length[]
1.41 paf 328: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 329:
1.1 paf 330: // ^string.int[]
1.41 paf 331: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 0);
1.6 paf 332:
1.1 paf 333: // ^string.double[]
1.41 paf 334: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 0);
1.9 paf 335:
1.24 paf 336: // ^string.format{format}
1.41 paf 337: add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 338:
1.15 paf 339: // ^string.left(n)
1.41 paf 340: add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 341: // ^string.right(n)
1.41 paf 342: add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 343: // ^string.mid(p;n)
1.41 paf 344: add_native_method("mid", Method::CT_DYNAMIC, _mid, 2, 2);
1.16 paf 345:
346: // ^string.pos[substr]
1.41 paf 347: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 348:
349: // ^string.lsplit[delim]
1.41 paf 350: add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 351: // ^string.rsplit[delim]
1.41 paf 352: add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 353:
1.32 paf 354: // ^string.match[regexp][options]
355: // ^string.match[regexp][options]{replacement-code}
1.41 paf 356: add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.49 parser 357:
358: // ^string.toupper[]
359: add_native_method("upper", Method::CT_DYNAMIC, _upper, 0, 0);
360: // ^string.tolower[]
361: add_native_method("lower", Method::CT_DYNAMIC, _lower, 0, 0);
1.53 ! parser 362:
! 363: // ^string:sql[query]
! 364: // ^string:sql[query](offset)
! 365: add_native_method("sql", Method::CT_DYNAMIC, _sql, 1, 2);
1.2 paf 366: }
1.1 paf 367:
1.41 paf 368: // global variable
369:
370: Methoded *string_class;
371:
372: // creator
373:
374: Methoded *MString_create(Pool& pool) {
375: return string_class=new(pool) MString(pool);
376: }
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