Annotation of parser3/src/classes/root.C, revision 1.56
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:
1.56 ! paf 8: $Id: root.C,v 1.55 2001/04/03 08:23:06 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"
1.1 paf 18:
1.34 paf 19: static void _if(Request& r, const String& method_name, Array *params) {
20: Value& condition_code=*static_cast<Value *>(params->get(0));
21: // forcing ^if(this param type)
22: r.fail_if_junction_(false, condition_code,
23: method_name, "condition must be junction");
1.36 paf 24:
1.34 paf 25: bool condition=r.process(condition_code,
26: 0/*no name*/,
1.51 paf 27: false/*don't intercept string*/).as_bool();
1.6 paf 28: if(condition) {
1.34 paf 29: Value& then_code=*static_cast<Value *>(params->get(1));
1.52 paf 30: // forcing ^if{this param type}
1.34 paf 31: r.fail_if_junction_(false, then_code,
32: method_name, "then-parameter must be junction");
33: r.write_pass_lang(r.process(then_code));
1.6 paf 34: } else if(params->size()==3) {
1.34 paf 35: Value& else_code=*static_cast<Value *>(params->get(2));
1.52 paf 36: // forcing ^if{this param type}
1.34 paf 37: r.fail_if_junction_(false, else_code,
38: method_name, "else-parameter must be junction");
39: r.write_pass_lang(r.process(else_code));
1.6 paf 40: }
1.1 paf 41: }
42:
1.22 paf 43: static void _untaint(Request& r, const String& method_name, Array *params) {
1.56 ! paf 44: Pool& pool=r.pool();
! 45:
1.18 paf 46: const String& lang_name=r.process(*static_cast<Value *>(params->get(0))).as_string();
1.15 paf 47: String::Untaint_lang lang=static_cast<String::Untaint_lang>(
1.23 paf 48: untaint_lang_name2enum->get_int(lang_name));
1.15 paf 49: if(!lang)
1.56 ! paf 50: PTHROW(0, 0,
1.15 paf 51: &lang_name,
1.18 paf 52: "invalid untaint language");
1.15 paf 53:
1.24 paf 54: {
55: Value *vbody=static_cast<Value *>(params->get(1));
56: // forcing ^untaint[]{this param type}
1.26 paf 57: r.fail_if_junction_(false, *vbody,
58: method_name, "body must be junction");
1.24 paf 59:
1.42 paf 60: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
61: r.write_pass_lang(r.process(*vbody)); // process marking tainted with that lang
62: }
63: }
64:
65: static void _taint(Request& r, const String& method_name, Array *params) {
1.56 ! paf 66: Pool& pool=r.pool();
! 67:
1.54 paf 68: String::Untaint_lang lang;
69: if(params->size()==1)
70: lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set
71: else {
72: const String& lang_name=r.process(*static_cast<Value *>(params->get(0))).as_string();
73: lang=static_cast<String::Untaint_lang>(
74: untaint_lang_name2enum->get_int(lang_name));
75: if(!lang)
1.56 ! paf 76: PTHROW(0, 0,
1.42 paf 77: &lang_name,
78: "invalid taint language");
1.54 paf 79: }
1.42 paf 80:
81: {
1.54 paf 82: Value *vbody=static_cast<Value *>(params->get(params->size()-1));
83: // forcing {this param type}
84: r.fail_if_junction_(true, *vbody, method_name, "body must not be junction");
1.42 paf 85:
1.44 paf 86: // set temporarily as-is language
1.54 paf 87: Temp_lang temp_lang(r, String::UL_PASS_APPENDED);
1.44 paf 88: String result(r.pool());
89: result.append(
90: r.process(*vbody).as_string(), // process marking tainted with that lang
1.45 paf 91: lang, true); // force result language to specified
1.42 paf 92: r.write_pass_lang(result);
1.24 paf 93: }
1.15 paf 94: }
95:
1.22 paf 96: static void _process(Request& r, const String& method_name, Array *params) {
1.20 paf 97: // calculate pseudo file name of processed chars
98: // would be something like "/some/file(4) process"
1.18 paf 99: char place[MAX_STRING];
100: #ifndef NO_STRING_ORIGIN
1.25 paf 101: const Origin& origin=method_name.origin();
1.18 paf 102: snprintf(place, MAX_STRING, "%s(%d) %s",
103: origin.file, 1+origin.line,
1.22 paf 104: method_name.cstr());
1.18 paf 105: #else
1.22 paf 106: strncpy(place, MAX_STRING, method_name.cstr());
1.18 paf 107: #endif
108:
1.38 paf 109: VStateless_class& self_class=*r.self->get_class();
1.22 paf 110: {
111: // temporary zero @main so to maybe-replace it in processed code
1.50 paf 112: Temp_method temp_method_main(self_class, *main_method_name, 0);
113: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
114: Temp_method temp_method_auto(self_class, *auto_method_name, 0);
1.22 paf 115:
1.25 paf 116: // evaluate source to process
117: const String& source=
118: r.process(*static_cast<Value *>(params->get(0))).as_string();
119:
1.22 paf 120: // process source code, append processed methods to 'self' class
121: // maybe-define new @main
122: r.use_buf(source.cstr(), place, &self_class);
123:
124: // maybe-execute @main[]
125: if(const Method *method=self_class.get_method(*main_method_name)) {
126: // execute!
127: r.execute(*method->parser_code);
128: }
1.18 paf 129: }
130: }
131:
1.26 paf 132: static void _rem(Request& r, const String& method_name, Array *params) {
1.27 paf 133: // forcing ^rem{this param type}
1.26 paf 134: r.fail_if_junction_(false, *static_cast<Value *>(params->get(0)),
135: method_name, "body must be junction");
136: }
1.18 paf 137:
1.27 paf 138: static void _while(Request& r, const String& method_name, Array *params) {
1.56 ! paf 139: Pool& pool=r.pool();
! 140:
1.27 paf 141: Value& vcondition=*static_cast<Value *>(params->get(0));
142: // forcing ^while(this param type){}
143: r.fail_if_junction_(false, vcondition,
144: method_name, "condition must be junction");
145:
146: Value& body=*static_cast<Value *>(params->get(1));
147: // forcing ^while(){this param type}
148: r.fail_if_junction_(false, body,
149: method_name, "body must be junction");
150:
151: // while...
152: int endless_loop_count=0;
153: while(true) {
154: if(++endless_loop_count>=1973) // endless loop?
1.56 ! paf 155: PTHROW(0, 0,
1.27 paf 156: &method_name,
157: "endless loop detected");
158:
159: bool condition=
160: r.process(
161: vcondition,
162: 0/*no name*/,
1.51 paf 163: false/*don't intercept string*/).as_bool();
1.27 paf 164: if(!condition) // ...condition is true
165: break;
166:
167: // write processed body
168: r.write_pass_lang(r.process(body));
169: }
170: }
171:
1.28 paf 172: static void _use(Request& r, const String& method_name, Array *params) {
173: Value& vfile=*static_cast<Value *>(params->get(0));
174: // forcing ^rem{this param type}
175: r.fail_if_junction_(true, vfile,
176: method_name, "file name must not be junction");
177:
1.49 paf 178: r.use_file(r.absolute(vfile.as_string()));
1.28 paf 179: }
180:
1.31 paf 181: static void _for(Request& r, const String& method_name, Array *params) {
182: // ^for[i;from-number;to-number-inclusive]{code}[delim]
183:
184: Pool& pool=r.pool();
185: const String& var_name=r.process(*static_cast<Value *>(params->get(0))).as_string();
1.51 paf 186: int from=(int)r.process(*static_cast<Value *>(params->get(1))).as_double();
187: int to=(int)r.process(*static_cast<Value *>(params->get(2))).as_double();
1.31 paf 188: Value& body_code=*static_cast<Value *>(params->get(3));
189: // forcing ^menu{this param type}
190: r.fail_if_junction_(false, body_code,
191: method_name, "body must be junction");
192: Value *delim_code=params->size()==3+1+1?static_cast<Value *>(params->get(3+1)):0;
193:
194: bool need_delim=false;
1.37 paf 195: VInt *vint=new(pool) VInt(pool, 0);
1.31 paf 196: int endless_loop_count=0;
1.37 paf 197: for(int i=from; i<=to; i++) {
1.31 paf 198: if(++endless_loop_count>=2001) // endless loop?
1.56 ! paf 199: PTHROW(0, 0,
1.31 paf 200: &method_name,
201: "endless loop detected");
1.37 paf 202: vint->set_int(i);
1.31 paf 203: r.wcontext->put_element(var_name, vint);
204:
205: Value& processed_body=r.process(body_code);
206: if(delim_code) { // delimiter set?
207: const String *string=processed_body.get_string();
208: if(need_delim && string && string->size()) // need delim & iteration produced string?
209: r.write_pass_lang(r.process(*delim_code));
210: need_delim=true;
211: }
212: r.write_pass_lang(processed_body);
213: }
214: }
215:
1.33 paf 216: static void _eval(Request& r, const String& method_name, Array *params) {
217: Value& expr=*static_cast<Value *>(params->get(0));
218: r.fail_if_junction_(false, expr,
219: method_name, "need expression");
220: // evaluate expresion
221: Value *result=r.process(expr,
222: 0/*no name*/,
1.51 paf 223: true/*don't intercept string*/).as_expr_result();
1.33 paf 224: if(params->size()==2) {
225: Value& fmt=*static_cast<Value *>(params->get(1));
226: // forcing ^format[this param type]
227: r.fail_if_junction_(true, fmt,
228: method_name, "fmt must not be junction");
229:
230: Pool& pool=r.pool();
1.41 paf 231: String& string=*new(pool) String(pool);
1.51 paf 232: string.APPEND_CONST(format(pool, result->as_double(), fmt.as_string().cstr()));
1.41 paf 233: result=new(pool) VString(string);
1.33 paf 234: }
1.40 paf 235: r.write_no_lang(*result);
1.33 paf 236: }
1.31 paf 237:
238:
1.29 paf 239: typedef double (*math_one_double_op_func_ptr)(double);
240: static double round(double op) { return floor(op+0.5); }
241: static double sign(double op) { return op > 0 ? 1 : ( op < 0 ? -1 : 0 ); }
242:
1.37 paf 243: static void double_one_op(
1.30 paf 244: Request& r,
245: const String& method_name, Array *params,
246: math_one_double_op_func_ptr func) {
1.29 paf 247: Pool& pool=r.pool();
248: Value& param=*static_cast<Value *>(params->get(0));
249:
250: // forcing ^round(this param type)
251: r.fail_if_junction_(false, param,
252: method_name, "parameter must be expression");
253:
1.51 paf 254: Value& result=*new(pool) VDouble(pool, (*func)(r.process(param).as_double()));
1.40 paf 255: r.write_no_lang(result);
1.29 paf 256: }
257:
258: static void _round(Request& r, const String& method_name, Array *params) {
1.37 paf 259: double_one_op(r, method_name, params, &round);
1.29 paf 260: }
261:
262: static void _floor(Request& r, const String& method_name, Array *params) {
1.37 paf 263: double_one_op(r, method_name, params, &floor);
1.29 paf 264: }
265:
266: static void _ceiling(Request& r, const String& method_name, Array *params) {
1.37 paf 267: double_one_op(r, method_name, params, &ceil);
1.29 paf 268: }
269:
270: static void _abs(Request& r, const String& method_name, Array *params) {
1.37 paf 271: double_one_op(r, method_name, params, &fabs);
1.29 paf 272: }
273:
274: static void _sign(Request& r, const String& method_name, Array *params) {
1.37 paf 275: double_one_op(r, method_name, params, &sign);
1.29 paf 276: }
1.40 paf 277:
1.56 ! paf 278: /// ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
! 279: /**
! 280: @test make params not Array but something with useful method for extracting,
! 281: with typecast and junction/not test
! 282: */
! 283: static void _connect(Request& r, const String& method_name, Array *params) {
! 284: Pool& pool=r.pool();
! 285:
! 286: Value& connect_string=*static_cast<Value *>(params->get(0));
! 287: r.fail_if_junction_(true, connect_string,
! 288: method_name, "connect string must not be junction");
! 289:
! 290: Value& body_code=*static_cast<Value *>(params->get(1));
! 291: r.fail_if_junction_(false, body_code,
! 292: method_name, "body must be junction");
! 293:
! 294: // remember/set current connection
! 295: const String *saved_connection=r.connection;
! 296: r.connection=&connect_string.as_string();
! 297:
! 298: bool need_rethrow=false; Exception rethrow_me;
! 299: PTRY {
! 300: r.write_assign_lang(r.process(body_code));
! 301: }
! 302: PCATCH(e) { // connect/process problem
! 303: rethrow_me=e; need_rethrow=true;
! 304: }
! 305: PEND_CATCH
! 306:
! 307: // FINALLY
! 308: if(need_rethrow)
! 309: ;//rollback
! 310: else
! 311: ;//commit
! 312:
! 313: // recall current connection from remembered
! 314: r.connection=saved_connection;
! 315:
! 316: if(need_rethrow) // were there an exception for us to rethrow?
! 317: PTHROW(rethrow_me.type(), rethrow_me.code(),
! 318: rethrow_me.problem_source(),
! 319: rethrow_me.comment());
! 320: }
! 321:
1.40 paf 322: // initialize
1.29 paf 323:
1.38 paf 324: void initialize_root_class(Pool& pool, VStateless_class& vclass) {
1.15 paf 325: // ^if(condition){code-when-true}
326: // ^if(condition){code-when-true}{code-when-false}
1.53 paf 327: vclass.add_native_method("if", Method::CT_ANY, _if, 2, 3);
1.15 paf 328:
1.42 paf 329: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.53 paf 330: vclass.add_native_method("untaint", Method::CT_ANY, _untaint, 2, 2);
1.42 paf 331:
332: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
1.54 paf 333: vclass.add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
1.18 paf 334:
335: // ^process[code]
1.53 paf 336: vclass.add_native_method("process", Method::CT_ANY, _process, 1, 1);
1.26 paf 337:
338: // ^rem{code}
1.53 paf 339: vclass.add_native_method("rem", Method::CT_ANY, _rem, 1, 1);
1.27 paf 340:
341: // ^while(condition){code}
1.53 paf 342: vclass.add_native_method("while", Method::CT_ANY, _while, 2, 2);
1.28 paf 343:
344: // ^use[file]
1.53 paf 345: vclass.add_native_method("use", Method::CT_ANY, _use, 1, 1);
1.29 paf 346:
1.31 paf 347: // ^for[i;from-number;to-number-inclusive]{code}[delim]
1.53 paf 348: vclass.add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
1.33 paf 349:
350: // ^eval(expr)
351: // ^eval(expr)[format]
1.53 paf 352: vclass.add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
1.31 paf 353:
1.29 paf 354:
355: // math functions
356:
357: // ^round(expr)
1.53 paf 358: vclass.add_native_method("round", Method::CT_ANY, _round, 1, 1);
1.29 paf 359:
360: // ^floor(expr)
1.53 paf 361: vclass.add_native_method("floor", Method::CT_ANY, _floor, 1, 1);
1.29 paf 362:
363: // ^ceiling(expr)
1.53 paf 364: vclass.add_native_method("ceiling", Method::CT_ANY, _ceiling, 1, 1);
1.29 paf 365:
366: // ^abs(expr)
1.53 paf 367: vclass.add_native_method("abs", Method::CT_ANY, _abs, 1, 1);
1.29 paf 368:
369: // ^sign(expr)
1.53 paf 370: vclass.add_native_method("sign", Method::CT_ANY, _sign, 1, 1);
1.56 ! paf 371:
! 372:
! 373: // connect
! 374:
! 375: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
! 376: vclass.add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
! 377:
1.1 paf 378: }
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