Annotation of parser3/src/classes/string.C, revision 1.102
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)
1.97 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.24 paf 6:
1.102 ! paf 7: $Id: string.C,v 1.101 2002/04/15 10:35:21 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
1.99 paf 53: converted=r.process_to_value(*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
1.99 paf 72: converted=r.process_to_value(*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
1.99 paf 85: const String& fmt=r.process_to_string(fmt_maybe_code);
1.9 paf 86:
1.95 paf 87: char *buf=format(pool, r.self->as_double(), fmt.cstr());
1.63 parser 88:
89: String result(pool);
90: result.APPEND_CLEAN(buf, 0,
91: method_name.origin().file,
92: method_name.origin().line);
93: r.write_no_lang(result);
1.9 paf 94: }
1.11 paf 95:
1.38 paf 96: static void _left(Request& r, const String&, MethodParams *params) {
1.15 paf 97: Pool& pool=r.pool();
98:
1.78 parser 99: size_t n=(size_t)params->as_int(0, "n must be int", r);
1.15 paf 100:
101: const String& string=*static_cast<VString *>(r.self)->get_string();
1.102 ! paf 102: r.write_assign_lang(string.mid(0, n));
1.15 paf 103: }
104:
1.38 paf 105: static void _right(Request& r, const String&, MethodParams *params) {
1.15 paf 106: Pool& pool=r.pool();
107:
1.78 parser 108: size_t n=(size_t)params->as_int(0, "n must be int", r);
1.15 paf 109:
110: const String& string=*static_cast<VString *>(r.self)->get_string();
1.102 ! paf 111: r.write_assign_lang(string.mid(string.size()-n, string.size()));
1.15 paf 112: }
113:
1.38 paf 114: static void _mid(Request& r, const String&, MethodParams *params) {
1.15 paf 115: Pool& pool=r.pool();
116:
1.83 parser 117: const String& string=*static_cast<VString *>(r.self)->get_string();
118:
1.78 parser 119: size_t p=(size_t)params->as_int(0, "p must be int", r);
1.83 parser 120: size_t n=params->size()>1?
121: (size_t)params->as_int(1, "n must be int", r):string.size();
1.15 paf 122:
1.102 ! paf 123: r.write_assign_lang(string.mid(p, p+n));
1.15 paf 124: }
125:
1.38 paf 126: static void _pos(Request& r, const String& method_name, MethodParams *params) {
1.16 paf 127: Pool& pool=r.pool();
128:
1.59 parser 129: Value& substr=params->as_no_junction(0, "substr must not be code");
1.16 paf 130:
131: const String& string=*static_cast<VString *>(r.self)->get_string();
132: r.write_assign_lang(*new(pool) VInt(pool, string.pos(substr.as_string())));
133: }
134:
1.38 paf 135: static void split_list(Request& r, const String& method_name, MethodParams *params,
1.23 paf 136: const String& string,
137: Array& result) {
1.59 parser 138: Value& delim_value=params->as_no_junction(0, "delimiter must not be code");
1.23 paf 139:
1.45 paf 140: string.split(result, 0, delim_value.as_string());
1.19 paf 141: }
142:
1.38 paf 143: static void _lsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 144: Pool& pool=r.pool();
145: const String& string=*static_cast<VString *>(r.self)->get_string();
146:
1.61 parser 147: Array pieces(pool);
148: split_list(r, method_name, params, string, pieces);
149:
150: Array& columns=*new(pool) Array(pool);
151: columns+=new(pool) String(pool, "piece");
1.19 paf 152:
1.21 paf 153: Table& table=*new(pool) Table(pool, &string,
1.61 parser 154: &columns, pieces.size());
1.69 parser 155: Array_iter i(pieces);
156: while(i.has_next()) {
1.61 parser 157: Array& row=*new(pool) Array(pool);
1.69 parser 158: row+=i.next();
1.61 parser 159: table+=&row;
160: }
1.19 paf 161: r.write_no_lang(*new(pool) VTable(pool, &table));
162: }
163:
1.38 paf 164: static void _rsplit(Request& r, const String& method_name, MethodParams *params) {
1.19 paf 165: Pool& pool=r.pool();
166: const String& string=*static_cast<VString *>(r.self)->get_string();
167:
1.61 parser 168: Array pieces(pool);
169: split_list(r, method_name, params, string, pieces);
1.19 paf 170:
1.61 parser 171: Array& columns=*new(pool) Array(pool);
172: columns+=new(pool) String(pool, "piece");
1.21 paf 173:
174: Table& table=*new(pool) Table(pool, &string,
1.61 parser 175: &columns, pieces.size());
176: for(int i=pieces.size(); --i>=0; ) {
177: Array& row=*new(pool) Array(pool);
178: row+=pieces.get(i);
179: table+=&row;
180: }
1.17 paf 181:
1.19 paf 182: r.write_no_lang(*new(pool) VTable(pool, &table));
1.17 paf 183: }
184:
1.33 paf 185: static void search_action(Table& table, Array *row, int, int, void *) {
1.28 paf 186: if(row)
187: table+=row;
1.27 paf 188: }
189:
1.74 parser 190: #ifndef DOXYGEN
1.27 paf 191: struct Replace_action_info {
1.30 paf 192: Request *request; const String *origin;
1.31 paf 193: const String *src; String *dest;
1.27 paf 194: Value *replacement_code;
1.29 paf 195: const String *post_match;
1.27 paf 196: };
1.74 parser 197: #endif
1.33 paf 198: static void replace_action(Table& table, Array *row, int start, int finish,
1.31 paf 199: void *info) {
1.27 paf 200: Replace_action_info& ai=*static_cast<Replace_action_info *>(info);
1.31 paf 201: if(row) { // begin&middle
202: // piece from last match['start'] to beginning of this match['finish']
203: if(start!=finish)
1.37 paf 204: *ai.dest << ai.src->mid(start, finish);//ai.dest->APPEND_CONST("-");
1.51 parser 205: // store found parts in one-record VTable
1.32 paf 206: if(table.size()) // middle
207: table.put(0, row);
208: else // begin
1.30 paf 209: table+=row;
210: { // execute 'replacement_code' in 'table' context
211: VTable& vtable=*new(table.pool()) VTable(table.pool(), &table);
212: vtable.set_name(*ai.origin);
213:
214: Junction *junction=ai.replacement_code->get_junction();
1.66 parser 215: Value *saved_match_var_value=junction->root->get_element(*match_var_name);
216: junction->root->put_element(*match_var_name, &vtable);
1.101 paf 217: const String& replaced=ai.request->process_to_string(*ai.replacement_code);
1.66 parser 218: junction->root->put_element(*match_var_name, saved_match_var_value);
1.30 paf 219:
1.34 paf 220: /*
1.31 paf 221: ai.dest->APPEND_CONST("(");
1.37 paf 222: *ai.dest << *(String *)row->get(1/*match* /);
1.31 paf 223: ai.dest->APPEND_CONST(")");
1.34 paf 224: */
1.99 paf 225: *ai.dest << replaced;
1.29 paf 226: }
227: ai.post_match=(String *)row->get(2/*post_match*/);
228: } else // end
1.37 paf 229: *ai.dest << *ai.post_match;
1.27 paf 230: }
231:
1.50 parser 232: /// @todo use pcre:study somehow
1.38 paf 233: static void _match(Request& r, const String& method_name, MethodParams *params) {
1.24 paf 234: Pool& pool=r.pool();
1.28 paf 235: const String& src=*static_cast<VString *>(r.self)->get_string();
1.24 paf 236:
1.59 parser 237: Value& regexp=params->as_no_junction(0, "regexp must not be code");
1.38 paf 238:
239: const String *options=
240: params->size()>1?
1.59 parser 241: ¶ms->as_no_junction(1, "options must not be code").as_string():0;
1.24 paf 242:
243: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.25 paf 244: Table *table;
1.27 paf 245: if(params->size()<3) { // search
1.64 parser 246: bool was_global;
1.92 paf 247: bool matched=src.match(
1.39 paf 248: &method_name,
1.32 paf 249: regexp.as_string(), options,
1.27 paf 250: &table,
1.64 parser 251: search_action, 0,
252: &was_global);
1.102 ! paf 253: Value *result;
1.60 parser 254: // matched
1.64 parser 255: // not (just matched[3=pre/match/post], no substrings) or Global search
256: if(table->columns()->size()>3 || was_global)
257: result=new(pool) VTable(pool, table); // table of pre/match/post+substrings
258: else
259: result=new(pool) VBool(pool, matched);
1.102 ! paf 260: result->set_name(method_name);
! 261: r.write_assign_lang(*result);
1.27 paf 262: } else { // replace
1.91 paf 263: Value& replacement_code=params->as_junction(2, "replacement param must be code");
1.24 paf 264:
1.102 ! paf 265: String& result=*new(pool) String(pool);
1.27 paf 266: Replace_action_info replace_action_info={
1.30 paf 267: &r, &method_name,
1.102 ! paf 268: &src, &result,
1.28 paf 269: &replacement_code,
1.29 paf 270: &src
1.27 paf 271: };
1.92 paf 272: src.match(
1.39 paf 273: &method_name,
1.99 paf 274: r.process_to_string(regexp), options,
1.27 paf 275: &table,
1.33 paf 276: replace_action, &replace_action_info);
1.102 ! paf 277: r.write_assign_lang(result);
1.27 paf 278: }
1.24 paf 279: }
280:
1.49 parser 281: static void change_case(Request& r, const String& method_name, MethodParams *params,
282: String::Change_case_kind kind) {
283: Pool& pool=r.pool();
284: const String& src=*static_cast<VString *>(r.self)->get_string();
285:
1.102 ! paf 286: r.write_assign_lang(src.change_case(pool, kind));
1.49 parser 287: }
288: static void _upper(Request& r, const String& method_name, MethodParams *params) {
289: change_case(r, method_name, params, String::CC_UPPER);
290: }
291: static void _lower(Request& r, const String& method_name, MethodParams *params) {
292: change_case(r, method_name, params, String::CC_LOWER);
293: }
294:
1.65 parser 295: #ifndef DOXYGEN
296: class String_sql_event_handlers : public SQL_Driver_query_event_handlers {
297: public:
298: String_sql_event_handlers(Pool& apool,
299: const String& astatement_string, const char *astatement_cstr) :
300: pool(apool),
301: statement_string(astatement_string),
302: statement_cstr(astatement_cstr),
303: got_column(false), got_cell(false) {
304: result=new(pool) String(pool);
305: }
306:
307: void add_column(void *ptr, size_t size) {
308: if(got_column)
1.98 paf 309: throw Exception("parser.runtime",
1.65 parser 310: &statement_string,
311: "result must contain exactly one column");
312: got_column=true;
313: }
314: void before_rows() { /* ignore */ }
315: void add_row() { /* ignore */ }
316: void add_row_cell(void *ptr, size_t size) {
317: if(got_cell)
1.98 paf 318: throw Exception("parser.runtime",
1.65 parser 319: &statement_string,
320: "result must not contain more then one row");
321: got_cell=true;
322:
323: result->APPEND_TAINTED((const char *)ptr, size, statement_cstr, 0);
324: }
325:
326: private:
327: Pool& pool;
328: const String& statement_string; const char *statement_cstr;
329: bool got_column;
330: public:
331: bool got_cell;
332: String *result;
333: };
334: #endif
1.70 parser 335: const String* sql_result_string(Request& r, const String& method_name, MethodParams *params,
1.81 parser 336: Hash *& options, Value *& default_code) {
1.53 parser 337: Pool& pool=r.pool();
338:
1.59 parser 339: Value& statement=params->as_junction(0, "statement must be code");
1.53 parser 340:
1.70 parser 341: ulong limit=0;
342: ulong offset=0;
1.81 parser 343: default_code=0;
1.70 parser 344: if(params->size()>1) {
1.73 parser 345: Value& voptions=params->as_no_junction(1, "options must be hash, not code");
346: if(voptions.is_defined())
1.85 parser 347: if(options=voptions.get_hash(&method_name)) {
1.73 parser 348: if(Value *vlimit=(Value *)options->get(*sql_limit_name))
1.99 paf 349: limit=(ulong)r.process_to_value(*vlimit).as_double();
1.73 parser 350: if(Value *voffset=(Value *)options->get(*sql_offset_name))
1.99 paf 351: offset=(ulong)r.process_to_value(*voffset).as_double();
1.81 parser 352: if(default_code=(Value *)options->get(*sql_default_name)) {
353: if(!default_code->get_junction())
1.98 paf 354: throw Exception("parser.runtime",
1.81 parser 355: &method_name,
356: "default option must be code");
357: }
1.73 parser 358: } else
1.98 paf 359: throw Exception("parser.runtime",
1.73 parser 360: &method_name,
361: "options must be hash");
1.70 parser 362: } else
363: options=0;
364:
1.53 parser 365: Temp_lang temp_lang(r, String::UL_SQL);
1.99 paf 366: const String& statement_string=r.process_to_string(statement);
1.53 parser 367: const char *statement_cstr=
1.93 paf 368: statement_string.cstr(String::UL_UNSPECIFIED, r.connection(&method_name));
1.65 parser 369: String_sql_event_handlers handlers(pool, statement_string, statement_cstr);
1.84 parser 370: try {
1.93 paf 371: r.connection(&method_name)->query(
1.70 parser 372: statement_cstr, offset, limit,
1.65 parser 373: handlers);
1.84 parser 374: } catch(const Exception& e) { // query problem
375: // give more specific source [were url]
1.98 paf 376: throw Exception("sql.execute",
1.84 parser 377: &statement_string,
378: "%s", e.comment());
1.53 parser 379: }
380:
1.65 parser 381: if(!handlers.got_cell)
382: return 0; // no lines, caller should return second param[default value]
1.62 parser 383:
1.65 parser 384: return handlers.result;
1.53 parser 385: }
386:
387: static void _sql(Request& r, const String& method_name, MethodParams *params) {
388: Pool& pool=r.pool();
389:
1.70 parser 390: Hash *options;
1.81 parser 391: Value *default_code;
392: const String *string=sql_result_string(r, method_name, params, options, default_code);
1.62 parser 393: if(!string) {
1.81 parser 394: if(default_code) {
1.99 paf 395: string=&r.process_to_string(*default_code);
1.81 parser 396: if(!string)
397: string=new(pool) String(pool);
1.68 parser 398: } else
1.98 paf 399: throw Exception("parser.runtime",
1.68 parser 400: &method_name,
1.81 parser 401: "produced no result, but no default option specified");
1.62 parser 402: }
1.100 paf 403:
1.102 ! paf 404: r.write_assign_lang(*string);
1.53 parser 405: }
406:
1.71 parser 407: static void _replace(Request& r, const String& method_name, MethodParams *params) {
408: Pool& pool=r.pool();
409: const String& src=*static_cast<VString *>(r.self)->get_string();
410:
411: Table *table=params->as_no_junction(0, "parameter must not be code").get_table();
412: if(!table)
1.98 paf 413: throw Exception("parser.runtime",
1.71 parser 414: &method_name,
415: "parameter must be table");
416:
417: Dictionary dict(*table);
1.102 ! paf 418: r.write_assign_lang(src.replace(pool, dict));
1.71 parser 419: }
1.79 parser 420:
421: static void _save(Request& r, const String& method_name, MethodParams *params) {
1.87 paf 422: const String& file_name=params->as_string(params->size()-1,
423: "file name must be string");
1.79 parser 424:
425: const String& src=*static_cast<VString *>(r.self)->get_string();
426:
1.87 paf 427: bool do_append=false;
428: if(params->size()>1) {
429: const String& mode=params->as_string(0, "mode must be string");
430: if(mode=="append")
431: do_append=true;
432: else
1.98 paf 433: throw Exception("parser.runtime",
1.87 paf 434: &mode,
435: "unknown mode, must be 'append'");
436: }
437:
1.79 parser 438: // write
1.89 paf 439: const char *buf=src.cstr(String::UL_UNSPECIFIED);
1.94 paf 440: file_write(r.absolute(file_name),
1.89 paf 441: buf, strlen(buf), true, do_append);
1.79 parser 442: }
443:
1.41 paf 444: // constructor
445:
446: MString::MString(Pool& apool) : Methoded(apool) {
447: set_name(*NEW String(pool(), STRING_CLASS_NAME));
448:
1.9 paf 449:
1.1 paf 450: // ^string.length[]
1.41 paf 451: add_native_method("length", Method::CT_DYNAMIC, _length, 0, 0);
1.6 paf 452:
1.1 paf 453: // ^string.int[]
1.72 parser 454: // ^string.int(default)
455: add_native_method("int", Method::CT_DYNAMIC, _int, 0, 1);
1.1 paf 456: // ^string.double[]
1.72 parser 457: // ^string.double(default)
458: add_native_method("double", Method::CT_DYNAMIC, _double, 0, 1);
1.9 paf 459:
1.24 paf 460: // ^string.format{format}
1.41 paf 461: add_native_method("format", Method::CT_DYNAMIC, _string_format, 1, 1);
1.14 paf 462:
1.15 paf 463: // ^string.left(n)
1.41 paf 464: add_native_method("left", Method::CT_DYNAMIC, _left, 1, 1);
1.15 paf 465: // ^string.right(n)
1.41 paf 466: add_native_method("right", Method::CT_DYNAMIC, _right, 1, 1);
1.15 paf 467: // ^string.mid(p;n)
1.82 parser 468: add_native_method("mid", Method::CT_DYNAMIC, _mid, 1, 2);
1.16 paf 469:
470: // ^string.pos[substr]
1.41 paf 471: add_native_method("pos", Method::CT_DYNAMIC, _pos, 1, 1);
1.17 paf 472:
473: // ^string.lsplit[delim]
1.41 paf 474: add_native_method("lsplit", Method::CT_DYNAMIC, _lsplit, 1, 1);
1.19 paf 475: // ^string.rsplit[delim]
1.41 paf 476: add_native_method("rsplit", Method::CT_DYNAMIC, _rsplit, 1, 1);
1.24 paf 477:
1.32 paf 478: // ^string.match[regexp][options]
479: // ^string.match[regexp][options]{replacement-code}
1.41 paf 480: add_native_method("match", Method::CT_DYNAMIC, _match, 1, 3);
1.49 parser 481:
482: // ^string.toupper[]
483: add_native_method("upper", Method::CT_DYNAMIC, _upper, 0, 0);
484: // ^string.tolower[]
485: add_native_method("lower", Method::CT_DYNAMIC, _lower, 0, 0);
1.53 parser 486:
1.70 parser 487: // ^sql[query]
488: // ^sql[query][$.limit(1) $.offset(2) $.default[n/a]]
1.67 parser 489: add_native_method("sql", Method::CT_STATIC, _sql, 1, 2);
1.71 parser 490:
491: // ^string.replace[table]
492: add_native_method("replace", Method::CT_DYNAMIC, _replace, 1, 1);
1.79 parser 493:
494: // ^string.save[file]
1.87 paf 495: add_native_method("save", Method::CT_DYNAMIC, _save, 1, 2);
1.2 paf 496: }
1.1 paf 497:
1.41 paf 498: // global variable
499:
500: Methoded *string_class;
501:
502: // creator
503:
504: Methoded *MString_create(Pool& pool) {
505: return string_class=new(pool) MString(pool);
506: }
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