Annotation of parser3/src/classes/string.C, revision 1.62
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: */
1.62 ! parser 8: static const char *RCSId="$Id: string.C,v 1.61 2001/07/11 16:32:13 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());
1.9 paf 62:
1.12 paf 63: r.write_no_lang(String(pool, buf));
1.9 paf 64: }
1.11 paf 65:
1.38 paf 66: static void _left(Request& r, const String&, MethodParams *params) {
1.15 paf 67: Pool& pool=r.pool();
68:
1.38 paf 69: size_t n=(size_t)r.process(params->get(0)).as_double();
1.15 paf 70:
71: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 72: r.write_assign_lang(*new(pool) VString(string.mid(0, n)));
1.15 paf 73: }
74:
1.38 paf 75: static void _right(Request& r, const String&, MethodParams *params) {
1.15 paf 76: Pool& pool=r.pool();
77:
1.38 paf 78: size_t n=(size_t)r.process(params->get(0)).as_double();
1.15 paf 79:
80: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 81: r.write_assign_lang(*new(pool) VString(string.mid(string.size()-n, string.size())));
1.15 paf 82: }
83:
1.38 paf 84: static void _mid(Request& r, const String&, MethodParams *params) {
1.15 paf 85: Pool& pool=r.pool();
86:
1.38 paf 87: size_t p=(size_t)r.process(params->get(0)).as_double();
88: size_t n=(size_t)r.process(params->get(1)).as_double();
1.15 paf 89:
90: const String& string=*static_cast<VString *>(r.self)->get_string();
1.35 paf 91: r.write_assign_lang(*new(pool) VString(string.mid(p, p+n)));
1.15 paf 92: }
93:
1.38 paf 94: static void _pos(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 95: Pool& pool=r.pool();
96:
1.59 parser 97: Value& substr=params->as_no_junction(0, "substr must not be code");
1.16 paf 98:
99: const String& string=*static_cast<VString *>(r.self)->get_string();
100: r.write_assign_lang(*new(pool) VInt(pool, string.pos(substr.as_string())));
101: }
102:
1.38 paf 103: static void split_list(Request& r, const String& method_name, MethodParams *params,
1.23 paf 104: const String& string,
105: Array& result) {
1.59 parser 106: Value& delim_value=params->as_no_junction(0, "delimiter must not be code");
1.23 paf 107:
1.45 paf 108: string.split(result, 0, delim_value.as_string());
1.19 paf 109: }
110:
1.38 paf 111: static void _lsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 112: Pool& pool=r.pool();
113: const String& string=*static_cast<VString *>(r.self)->get_string();
114:
1.61 parser 115: Array pieces(pool);
116: split_list(r, method_name, params, string, pieces);
117:
118: Array& columns=*new(pool) Array(pool);
119: columns+=new(pool) String(pool, "piece");
1.19 paf 120:
1.21 paf 121: Table& table=*new(pool) Table(pool, &string,
1.61 parser 122: &columns, pieces.size());
123: int size=pieces.quick_size();
124: for(int i=0; i<size; i++) {
125: Array& row=*new(pool) Array(pool);
126: row+=pieces.quick_get(i);
127: table+=&row;
128: }
1.19 paf 129: r.write_no_lang(*new(pool) VTable(pool, &table));
130: }
131:
1.38 paf 132: static void _rsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 133: Pool& pool=r.pool();
134: const String& string=*static_cast<VString *>(r.self)->get_string();
135:
1.61 parser 136: Array pieces(pool);
137: split_list(r, method_name, params, string, pieces);
1.19 paf 138:
1.61 parser 139: Array& columns=*new(pool) Array(pool);
140: columns+=new(pool) String(pool, "piece");
1.21 paf 141:
142: Table& table=*new(pool) Table(pool, &string,
1.61 parser 143: &columns, pieces.size());
144: for(int i=pieces.size(); --i>=0; ) {
145: Array& row=*new(pool) Array(pool);
146: row+=pieces.get(i);
147: table+=&row;
148: }
1.17 paf 149:
1.19 paf 150: r.write_no_lang(*new(pool) VTable(pool, &table));
1.17 paf 151: }
152:
1.33 paf 153: static void search_action(Table& table, Array *row, int, int, void *) {
1.28 paf 154: if(row)
155: table+=row;
1.27 paf 156: }
157:
1.40 paf 158: /// used by string: _match / replace_action
1.27 paf 159: struct Replace_action_info {
1.30 paf 160: Request *request; const String *origin;
1.31 paf 161: const String *src; String *dest;
1.27 paf 162: Value *replacement_code;
1.29 paf 163: const String *post_match;
1.27 paf 164: };
1.33 paf 165: static void replace_action(Table& table, Array *row, int start, int finish,
1.31 paf 166: void *info) {
1.27 paf 167: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.31 paf 168: if(row) { // begin&middle
169: // piece from last match['start'] to beginning of this match['finish']
170: if(start!=finish)
1.37 paf 171: *ai.dest << ai.src->mid(start, finish);//ai.dest->APPEND_CONST("-");
1.51 parser 172: // store found parts in one-record VTable
1.32 paf 173: if(table.size()) // middle
174: table.put(0, row);
175: else // begin
1.30 paf 176: table+=row;
177: { // execute 'replacement_code' in 'table' context
178: VTable& vtable=*new(table.pool()) VTable(table.pool(), &table);
179: vtable.set_name(*ai.origin);
180:
181: Junction *junction=ai.replacement_code->get_junction();
1.52 parser 182: junction->rcontext=/*must be some way to get to
183: outside world junction->root=*/&vtable;
1.30 paf 184: Value& replaced=ai.request->process(*ai.replacement_code, ai.origin, false);
185:
1.34 paf 186: /*
1.31 paf 187: ai.dest->APPEND_CONST("(");
1.37 paf 188: *ai.dest << *(String *)row->get(1/*match* /);
1.31 paf 189: ai.dest->APPEND_CONST(")");
1.34 paf 190: */
1.37 paf 191: *ai.dest << replaced.as_string();
1.29 paf 192: }
193: ai.post_match=(String *)row->get(2/*post_match*/);
194: } else // end
1.37 paf 195: *ai.dest << *ai.post_match;
1.27 paf 196: }
197:
1.50 parser 198: /// @todo use pcre:study somehow
1.38 paf 199: static void _match(Request& r, const String& method_name, MethodParams *params) {
1.24 paf 200: Pool& pool=r.pool();
1.28 paf 201: const String& src=*static_cast<VString *>(r.self)->get_string();
1.24 paf 202:
1.59 parser 203: Value& regexp=params->as_no_junction(0, "regexp must not be code");
1.38 paf 204:
205: const String *options=
206: params->size()>1?
1.59 parser 207: ¶ms->as_no_junction(1, "options must not be code").as_string():0;
1.24 paf 208:
1.27 paf 209: Value *result;
1.24 paf 210: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.25 paf 211: Table *table;
1.27 paf 212: if(params->size()<3) { // search
1.60 parser 213: bool matched=src.match(r.pcre_tables,
1.39 paf 214: &method_name,
1.32 paf 215: regexp.as_string(), options,
1.27 paf 216: &table,
1.60 parser 217: search_action, 0);
218: // matched
219: if(table->columns()->size()==3 && // just matched[3=pre/match/post], no substrings
220: table->size()<=1) // just one row, not /g_lobal search
221: result=new(pool) VBool(pool, matched);
222: else // table of pre/match/post+substrings
223: result=new(pool) VTable(pool, table);
1.27 paf 224: } else { // replace
1.59 parser 225: Value& replacement_code=params->as_junction(2, "replacement code must be code");
1.24 paf 226:
1.28 paf 227: String& dest=*new(pool) String(pool);
1.27 paf 228: Replace_action_info replace_action_info={
1.30 paf 229: &r, &method_name,
1.31 paf 230: &src, &dest,
1.28 paf 231: &replacement_code,
1.29 paf 232: &src
1.27 paf 233: };
1.39 paf 234: src.match(r.pcre_tables,
235: &method_name,
1.27 paf 236: r.process(regexp).as_string(), options,
237: &table,
1.33 paf 238: replace_action, &replace_action_info);
1.28 paf 239: result=new(pool) VString(dest);
1.27 paf 240: }
1.26 paf 241: result->set_name(method_name);
1.34 paf 242: r.write_assign_lang(*result);
1.24 paf 243: }
244:
1.49 parser 245: static void change_case(Request& r, const String& method_name, MethodParams *params,
246: String::Change_case_kind kind) {
247: Pool& pool=r.pool();
248: const String& src=*static_cast<VString *>(r.self)->get_string();
249:
250: r.write_assign_lang(*new(pool) VString(src.change_case(pool, r.pcre_tables,
251: kind)));
252: }
253: static void _upper(Request& r, const String& method_name, MethodParams *params) {
254: change_case(r, method_name, params, String::CC_UPPER);
255: }
256: static void _lower(Request& r, const String& method_name, MethodParams *params) {
257: change_case(r, method_name, params, String::CC_LOWER);
258: }
259:
1.62 ! parser 260: const String* sql_result_string(Request& r, const String& method_name, MethodParams *params) {
1.53 parser 261: Pool& pool=r.pool();
262:
263: if(!r.connection)
264: PTHROW(0, 0,
265: &method_name,
266: "without connect");
267:
1.59 parser 268: Value& statement=params->as_junction(0, "statement must be code");
1.53 parser 269:
1.62 ! parser 270: ulong offset=(ulong)(params->size()>2?params->as_int(2, r):0);
1.53 parser 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,
1.56 parser 297: "result must contain exactly one column");
1.53 parser 298:
1.62 ! parser 299: if(!sql_row_count)
! 300: return 0; // no lines, should return second param[default value]
! 301:
! 302: if(sql_row_count>1)
1.53 parser 303: PTHROW(0, 0,
304: &statement_string,
1.62 ! parser 305: "result must not contain more then one row");
1.53 parser 306:
1.62 ! parser 307: String *result=new(pool) String(pool);
1.53 parser 308: SQL_Driver::Cell& cell=sql_rows[0][0];
1.62 ! parser 309: result->APPEND_TAINTED(
1.53 parser 310: (const char *)cell.ptr, cell.size,
311: statement_cstr, 0);
312:
313: return result;
314: }
315:
316: static void _sql(Request& r, const String& method_name, MethodParams *params) {
317: Pool& pool=r.pool();
318:
1.62 ! parser 319: const String *string=sql_result_string(r, method_name, params);
! 320: if(!string) {
! 321: Value& default_code=params->as_junction(1, "default result must code");
! 322: Value& processed_code=r.process(default_code);
! 323: string=processed_code.get_string();
! 324: if(!string)
! 325: string=empty_string;
! 326: }
! 327: VString& result=*new(pool) VString(*string);
1.53 parser 328: result.set_name(method_name);
329: r.write_assign_lang(result);
330: }
331:
1.41 paf 332: // constructor
333:
334: MString::MString(Pool& apool) : Methoded(apool) {
335: set_name(*NEW String(pool(), STRING_CLASS_NAME));
336:
1.9 paf 337:
1.1 paf 338: // ^string.length[]
1.41 paf 339: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 340:
1.1 paf 341: // ^string.int[]
1.41 paf 342: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 0);
1.6 paf 343:
1.1 paf 344: // ^string.double[]
1.41 paf 345: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 0);
1.9 paf 346:
1.24 paf 347: // ^string.format{format}
1.41 paf 348: add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 349:
1.15 paf 350: // ^string.left(n)
1.41 paf 351: add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 352: // ^string.right(n)
1.41 paf 353: add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 354: // ^string.mid(p;n)
1.41 paf 355: add_native_method("mid", Method::CT_DYNAMIC, _mid, 2, 2);
1.16 paf 356:
357: // ^string.pos[substr]
1.41 paf 358: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 359:
360: // ^string.lsplit[delim]
1.41 paf 361: add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 362: // ^string.rsplit[delim]
1.41 paf 363: add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 364:
1.32 paf 365: // ^string.match[regexp][options]
366: // ^string.match[regexp][options]{replacement-code}
1.41 paf 367: add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.49 parser 368:
369: // ^string.toupper[]
370: add_native_method("upper", Method::CT_DYNAMIC, _upper, 0, 0);
371: // ^string.tolower[]
372: add_native_method("lower", Method::CT_DYNAMIC, _lower, 0, 0);
1.53 parser 373:
1.62 ! parser 374: // ^string:sql[query]{default}
! 375: // ^string:sql[query]{default}(offset)
! 376: add_native_method("sql", Method::CT_STATIC, _sql, 2, 3);
1.2 paf 377: }
1.1 paf 378:
1.41 paf 379: // global variable
380:
381: Methoded *string_class;
382:
383: // creator
384:
385: Methoded *MString_create(Pool& pool) {
386: return string_class=new(pool) MString(pool);
387: }
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