Annotation of parser3/src/classes/root.C, revision 1.60
1.55 paf 1: /** @file
2: Parser: @b ROOT parser class.
3:
1.10 paf 4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.55 paf 5:
1.12 paf 6: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.10 paf 7:
1.60 ! paf 8: $Id: root.C,v 1.59 2001/04/05 08:09:17 paf Exp $
1.1 paf 9: */
10:
1.48 paf 11: #include "pa_config_includes.h"
1.29 paf 12: #include <math.h>
1.18 paf 13:
1.46 paf 14: #include "pa_common.h"
1.1 paf 15: #include "pa_request.h"
1.8 paf 16: #include "_root.h"
1.31 paf 17: #include "pa_vint.h"
1.58 paf 18: #include "pa_sql_connection.h"
1.1 paf 19:
1.34 paf 20: static void _if(Request& r, const String& method_name, Array *params) {
21: Value& condition_code=*static_cast<Value *>(params->get(0));
22: // forcing ^if(this param type)
23: r.fail_if_junction_(false, condition_code,
24: method_name, "condition must be junction");
1.36 paf 25:
1.34 paf 26: bool condition=r.process(condition_code,
27: 0/*no name*/,
1.51 paf 28: false/*don't intercept string*/).as_bool();
1.6 paf 29: if(condition) {
1.34 paf 30: Value& then_code=*static_cast<Value *>(params->get(1));
1.52 paf 31: // forcing ^if{this param type}
1.34 paf 32: r.fail_if_junction_(false, then_code,
33: method_name, "then-parameter must be junction");
34: r.write_pass_lang(r.process(then_code));
1.6 paf 35: } else if(params->size()==3) {
1.34 paf 36: Value& else_code=*static_cast<Value *>(params->get(2));
1.52 paf 37: // forcing ^if{this param type}
1.34 paf 38: r.fail_if_junction_(false, else_code,
39: method_name, "else-parameter must be junction");
40: r.write_pass_lang(r.process(else_code));
1.6 paf 41: }
1.1 paf 42: }
43:
1.22 paf 44: static void _untaint(Request& r, const String& method_name, Array *params) {
1.56 paf 45: Pool& pool=r.pool();
46:
1.18 paf 47: const String& lang_name=r.process(*static_cast<Value *>(params->get(0))).as_string();
1.15 paf 48: String::Untaint_lang lang=static_cast<String::Untaint_lang>(
1.23 paf 49: untaint_lang_name2enum->get_int(lang_name));
1.15 paf 50: if(!lang)
1.56 paf 51: PTHROW(0, 0,
1.15 paf 52: &lang_name,
1.18 paf 53: "invalid untaint language");
1.15 paf 54:
1.24 paf 55: {
56: Value *vbody=static_cast<Value *>(params->get(1));
57: // forcing ^untaint[]{this param type}
1.26 paf 58: r.fail_if_junction_(false, *vbody,
59: method_name, "body must be junction");
1.24 paf 60:
1.42 paf 61: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
62: r.write_pass_lang(r.process(*vbody)); // process marking tainted with that lang
63: }
64: }
65:
66: static void _taint(Request& r, const String& method_name, Array *params) {
1.56 paf 67: Pool& pool=r.pool();
68:
1.54 paf 69: String::Untaint_lang lang;
70: if(params->size()==1)
71: lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set
72: else {
73: const String& lang_name=r.process(*static_cast<Value *>(params->get(0))).as_string();
74: lang=static_cast<String::Untaint_lang>(
75: untaint_lang_name2enum->get_int(lang_name));
76: if(!lang)
1.56 paf 77: PTHROW(0, 0,
1.42 paf 78: &lang_name,
79: "invalid taint language");
1.54 paf 80: }
1.42 paf 81:
82: {
1.60 ! paf 83: Value& vbody=*static_cast<Value *>(params->get(params->size()-1));
! 84: // forcing [this param type]
! 85: r.fail_if_junction_(true, vbody, method_name, "body must not be junction");
1.42 paf 86:
1.44 paf 87: String result(r.pool());
88: result.append(
1.60 ! paf 89: vbody.as_string(), // process marking tainted with that lang
1.45 paf 90: lang, true); // force result language to specified
1.42 paf 91: r.write_pass_lang(result);
1.24 paf 92: }
1.15 paf 93: }
94:
1.22 paf 95: static void _process(Request& r, const String& method_name, Array *params) {
1.20 paf 96: // calculate pseudo file name of processed chars
97: // would be something like "/some/file(4) process"
1.18 paf 98: char place[MAX_STRING];
99: #ifndef NO_STRING_ORIGIN
1.25 paf 100: const Origin& origin=method_name.origin();
1.18 paf 101: snprintf(place, MAX_STRING, "%s(%d) %s",
102: origin.file, 1+origin.line,
1.22 paf 103: method_name.cstr());
1.18 paf 104: #else
1.22 paf 105: strncpy(place, MAX_STRING, method_name.cstr());
1.18 paf 106: #endif
107:
1.38 paf 108: VStateless_class& self_class=*r.self->get_class();
1.22 paf 109: {
110: // temporary zero @main so to maybe-replace it in processed code
1.50 paf 111: Temp_method temp_method_main(self_class, *main_method_name, 0);
112: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
113: Temp_method temp_method_auto(self_class, *auto_method_name, 0);
1.22 paf 114:
1.25 paf 115: // evaluate source to process
116: const String& source=
117: r.process(*static_cast<Value *>(params->get(0))).as_string();
118:
1.22 paf 119: // process source code, append processed methods to 'self' class
120: // maybe-define new @main
121: r.use_buf(source.cstr(), place, &self_class);
122:
123: // maybe-execute @main[]
124: if(const Method *method=self_class.get_method(*main_method_name)) {
125: // execute!
126: r.execute(*method->parser_code);
127: }
1.18 paf 128: }
129: }
130:
1.26 paf 131: static void _rem(Request& r, const String& method_name, Array *params) {
1.27 paf 132: // forcing ^rem{this param type}
1.26 paf 133: r.fail_if_junction_(false, *static_cast<Value *>(params->get(0)),
134: method_name, "body must be junction");
135: }
1.18 paf 136:
1.27 paf 137: static void _while(Request& r, const String& method_name, Array *params) {
1.56 paf 138: Pool& pool=r.pool();
139:
1.27 paf 140: Value& vcondition=*static_cast<Value *>(params->get(0));
141: // forcing ^while(this param type){}
142: r.fail_if_junction_(false, vcondition,
143: method_name, "condition must be junction");
144:
145: Value& body=*static_cast<Value *>(params->get(1));
146: // forcing ^while(){this param type}
147: r.fail_if_junction_(false, body,
148: method_name, "body must be junction");
149:
150: // while...
151: int endless_loop_count=0;
152: while(true) {
153: if(++endless_loop_count>=1973) // endless loop?
1.56 paf 154: PTHROW(0, 0,
1.27 paf 155: &method_name,
156: "endless loop detected");
157:
158: bool condition=
159: r.process(
160: vcondition,
161: 0/*no name*/,
1.51 paf 162: false/*don't intercept string*/).as_bool();
1.27 paf 163: if(!condition) // ...condition is true
164: break;
165:
166: // write processed body
167: r.write_pass_lang(r.process(body));
168: }
169: }
170:
1.28 paf 171: static void _use(Request& r, const String& method_name, Array *params) {
172: Value& vfile=*static_cast<Value *>(params->get(0));
173: // forcing ^rem{this param type}
174: r.fail_if_junction_(true, vfile,
175: method_name, "file name must not be junction");
176:
1.49 paf 177: r.use_file(r.absolute(vfile.as_string()));
1.28 paf 178: }
179:
1.31 paf 180: static void _for(Request& r, const String& method_name, Array *params) {
181: // ^for[i;from-number;to-number-inclusive]{code}[delim]
182:
183: Pool& pool=r.pool();
184: const String& var_name=r.process(*static_cast<Value *>(params->get(0))).as_string();
1.51 paf 185: int from=(int)r.process(*static_cast<Value *>(params->get(1))).as_double();
186: int to=(int)r.process(*static_cast<Value *>(params->get(2))).as_double();
1.31 paf 187: Value& body_code=*static_cast<Value *>(params->get(3));
188: // forcing ^menu{this param type}
189: r.fail_if_junction_(false, body_code,
190: method_name, "body must be junction");
191: Value *delim_code=params->size()==3+1+1?static_cast<Value *>(params->get(3+1)):0;
192:
193: bool need_delim=false;
1.37 paf 194: VInt *vint=new(pool) VInt(pool, 0);
1.31 paf 195: int endless_loop_count=0;
1.37 paf 196: for(int i=from; i<=to; i++) {
1.31 paf 197: if(++endless_loop_count>=2001) // endless loop?
1.56 paf 198: PTHROW(0, 0,
1.31 paf 199: &method_name,
200: "endless loop detected");
1.37 paf 201: vint->set_int(i);
1.31 paf 202: r.wcontext->put_element(var_name, vint);
203:
204: Value& processed_body=r.process(body_code);
205: if(delim_code) { // delimiter set?
206: const String *string=processed_body.get_string();
207: if(need_delim && string && string->size()) // need delim & iteration produced string?
208: r.write_pass_lang(r.process(*delim_code));
209: need_delim=true;
210: }
211: r.write_pass_lang(processed_body);
212: }
213: }
214:
1.33 paf 215: static void _eval(Request& r, const String& method_name, Array *params) {
216: Value& expr=*static_cast<Value *>(params->get(0));
217: r.fail_if_junction_(false, expr,
218: method_name, "need expression");
219: // evaluate expresion
220: Value *result=r.process(expr,
221: 0/*no name*/,
1.51 paf 222: true/*don't intercept string*/).as_expr_result();
1.33 paf 223: if(params->size()==2) {
224: Value& fmt=*static_cast<Value *>(params->get(1));
225: // forcing ^format[this param type]
226: r.fail_if_junction_(true, fmt,
227: method_name, "fmt must not be junction");
228:
229: Pool& pool=r.pool();
1.41 paf 230: String& string=*new(pool) String(pool);
1.51 paf 231: string.APPEND_CONST(format(pool, result->as_double(), fmt.as_string().cstr()));
1.41 paf 232: result=new(pool) VString(string);
1.33 paf 233: }
1.40 paf 234: r.write_no_lang(*result);
1.33 paf 235: }
1.31 paf 236:
237:
1.29 paf 238: typedef double (*math_one_double_op_func_ptr)(double);
239: static double round(double op) { return floor(op+0.5); }
240: static double sign(double op) { return op > 0 ? 1 : ( op < 0 ? -1 : 0 ); }
241:
1.37 paf 242: static void double_one_op(
1.30 paf 243: Request& r,
244: const String& method_name, Array *params,
245: math_one_double_op_func_ptr func) {
1.29 paf 246: Pool& pool=r.pool();
247: Value& param=*static_cast<Value *>(params->get(0));
248:
249: // forcing ^round(this param type)
250: r.fail_if_junction_(false, param,
251: method_name, "parameter must be expression");
252:
1.51 paf 253: Value& result=*new(pool) VDouble(pool, (*func)(r.process(param).as_double()));
1.40 paf 254: r.write_no_lang(result);
1.29 paf 255: }
256:
257: static void _round(Request& r, const String& method_name, Array *params) {
1.37 paf 258: double_one_op(r, method_name, params, &round);
1.29 paf 259: }
260:
261: static void _floor(Request& r, const String& method_name, Array *params) {
1.37 paf 262: double_one_op(r, method_name, params, &floor);
1.29 paf 263: }
264:
265: static void _ceiling(Request& r, const String& method_name, Array *params) {
1.37 paf 266: double_one_op(r, method_name, params, &ceil);
1.29 paf 267: }
268:
269: static void _abs(Request& r, const String& method_name, Array *params) {
1.37 paf 270: double_one_op(r, method_name, params, &fabs);
1.29 paf 271: }
272:
273: static void _sign(Request& r, const String& method_name, Array *params) {
1.37 paf 274: double_one_op(r, method_name, params, &sign);
1.29 paf 275: }
1.40 paf 276:
1.56 paf 277: /// ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
278: /**
279: @test make params not Array but something with useful method for extracting,
280: with typecast and junction/not test
281: */
282: static void _connect(Request& r, const String& method_name, Array *params) {
283: Pool& pool=r.pool();
284:
1.57 paf 285: Value& url=*static_cast<Value *>(params->get(0));
286: r.fail_if_junction_(true, url,
287: method_name, "url must not be junction");
1.56 paf 288:
289: Value& body_code=*static_cast<Value *>(params->get(1));
290: r.fail_if_junction_(false, body_code,
291: method_name, "body must be junction");
292:
1.59 paf 293: // connect
1.58 paf 294: SQL_Connection& connection=SQL_driver_manager->get_connection(
295: url.as_string(), r.protocol2library);
296:
297: Exception rethrow_me;
1.56 paf 298: // remember/set current connection
1.57 paf 299: SQL_Connection *saved_connection=r.connection;
1.58 paf 300: r.connection=&connection;
301: // execute body
302: bool body_failed=false;
303: PTRY
1.56 paf 304: r.write_assign_lang(r.process(body_code));
305: PCATCH(e) { // connect/process problem
1.58 paf 306: rethrow_me=e; body_failed=true;
307: }
308: PEND_CATCH
309:
310: bool finalizer_failed=false;
311: PTRY
312: // FINALLY
313: if(body_failed)
314: connection.rollback();
315: else
316: connection.commit();
317: PCATCH(e) { // commit/rollback problem
318: rethrow_me=e; finalizer_failed=true;
1.56 paf 319: }
320: PEND_CATCH
321:
1.58 paf 322: // close connection [cache it]
323: connection.close();
1.56 paf 324: // recall current connection from remembered
325: r.connection=saved_connection;
326:
1.58 paf 327: if(body_failed || finalizer_failed) // were there an exception for us to rethrow?
1.56 paf 328: PTHROW(rethrow_me.type(), rethrow_me.code(),
329: rethrow_me.problem_source(),
330: rethrow_me.comment());
331: }
332:
1.40 paf 333: // initialize
1.29 paf 334:
1.38 paf 335: void initialize_root_class(Pool& pool, VStateless_class& vclass) {
1.15 paf 336: // ^if(condition){code-when-true}
337: // ^if(condition){code-when-true}{code-when-false}
1.53 paf 338: vclass.add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.15 paf 339:
1.42 paf 340: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.53 paf 341: vclass.add_native_method("untaint", Method::CT_ANY, _untaint, 2, 2);
1.42 paf 342:
343: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.54 paf 344: vclass.add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.18 paf 345:
346: // ^process[code]
1.53 paf 347: vclass.add_native_method("process", Method::CT_ANY, _process, 1, 1);
1.26 paf 348:
349: // ^rem{code}
1.53 paf 350: vclass.add_native_method("rem", Method::CT_ANY, _rem, 1, 1);
1.27 paf 351:
352: // ^while(condition){code}
1.53 paf 353: vclass.add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.28 paf 354:
355: // ^use[file]
1.53 paf 356: vclass.add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.29 paf 357:
1.31 paf 358: // ^for[i;from-number;to-number-inclusive]{code}[delim]
1.53 paf 359: vclass.add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.33 paf 360:
361: // ^eval(expr)
362: // ^eval(expr)[format]
1.53 paf 363: vclass.add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.31 paf 364:
1.29 paf 365:
366: // math functions
367:
368: // ^round(expr)
1.53 paf 369: vclass.add_native_method("round", Method::CT_ANY, _round, 1, 1);
1.29 paf 370:
371: // ^floor(expr)
1.53 paf 372: vclass.add_native_method("floor", Method::CT_ANY, _floor, 1, 1);
1.29 paf 373:
374: // ^ceiling(expr)
1.53 paf 375: vclass.add_native_method("ceiling", Method::CT_ANY, _ceiling, 1, 1);
1.29 paf 376:
377: // ^abs(expr)
1.53 paf 378: vclass.add_native_method("abs", Method::CT_ANY, _abs, 1, 1);
1.29 paf 379:
380: // ^sign(expr)
1.53 paf 381: vclass.add_native_method("sign", Method::CT_ANY, _sign, 1, 1);
1.56 paf 382:
383:
384: // connect
385:
386: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
387: vclass.add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
388:
1.1 paf 389: }
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