Annotation of parser3/src/classes/root.C, revision 1.50
1.1 paf 1: /*
1.10 paf 2: Parser
3: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
1.12 paf 4: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
1.10 paf 5:
1.50 ! paf 6: $Id: root.C,v 1.49 2001/03/24 15:57:57 paf Exp $
1.1 paf 7: */
8:
1.48 paf 9: #include "pa_config_includes.h"
1.29 paf 10: #include <math.h>
1.18 paf 11:
1.46 paf 12: #include "pa_common.h"
1.1 paf 13: #include "pa_request.h"
1.8 paf 14: #include "_root.h"
1.31 paf 15: #include "pa_vint.h"
1.1 paf 16:
1.34 paf 17: static void _if(Request& r, const String& method_name, Array *params) {
18: Value& condition_code=*static_cast<Value *>(params->get(0));
19: // forcing ^if(this param type)
20: r.fail_if_junction_(false, condition_code,
21: method_name, "condition must be junction");
1.36 paf 22:
1.34 paf 23: bool condition=r.process(condition_code,
24: 0/*no name*/,
25: false/*don't intercept string*/).get_bool();
1.6 paf 26: if(condition) {
1.34 paf 27: Value& then_code=*static_cast<Value *>(params->get(1));
28: // forcing ^if(this param type)
29: r.fail_if_junction_(false, then_code,
30: method_name, "then-parameter must be junction");
31: r.write_pass_lang(r.process(then_code));
1.6 paf 32: } else if(params->size()==3) {
1.34 paf 33: Value& else_code=*static_cast<Value *>(params->get(2));
34: // forcing ^if(this param type)
35: r.fail_if_junction_(false, else_code,
36: method_name, "else-parameter must be junction");
37: r.write_pass_lang(r.process(else_code));
1.6 paf 38: }
1.1 paf 39: }
40:
1.22 paf 41: static void _untaint(Request& r, const String& method_name, Array *params) {
1.18 paf 42: const String& lang_name=r.process(*static_cast<Value *>(params->get(0))).as_string();
1.15 paf 43: String::Untaint_lang lang=static_cast<String::Untaint_lang>(
1.23 paf 44: untaint_lang_name2enum->get_int(lang_name));
1.15 paf 45: if(!lang)
1.39 paf 46: RTHROW(0, 0,
1.15 paf 47: &lang_name,
1.18 paf 48: "invalid untaint language");
1.15 paf 49:
1.24 paf 50: {
51: Value *vbody=static_cast<Value *>(params->get(1));
52: // forcing ^untaint[]{this param type}
1.26 paf 53: r.fail_if_junction_(false, *vbody,
54: method_name, "body must be junction");
1.24 paf 55:
1.42 paf 56: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
57: r.write_pass_lang(r.process(*vbody)); // process marking tainted with that lang
58: }
59: }
60:
61: static void _taint(Request& r, const String& method_name, Array *params) {
62: const String& lang_name=r.process(*static_cast<Value *>(params->get(0))).as_string();
63: String::Untaint_lang lang=static_cast<String::Untaint_lang>(
64: untaint_lang_name2enum->get_int(lang_name));
65: if(!lang)
66: RTHROW(0, 0,
67: &lang_name,
68: "invalid taint language");
69:
70: {
71: Value *vbody=static_cast<Value *>(params->get(1));
72: // forcing ^untaint[]{this param type}
1.43 paf 73: r.fail_if_junction_(true, *vbody,
74: method_name, "body must not be junction");
1.42 paf 75:
1.44 paf 76: // set temporarily as-is language
1.47 paf 77: Temp_lang temp_lang(r, String::UL_AS_IS);
1.44 paf 78: String result(r.pool());
79: result.append(
80: r.process(*vbody).as_string(), // process marking tainted with that lang
1.45 paf 81: lang, true); // force result language to specified
1.42 paf 82: r.write_pass_lang(result);
1.24 paf 83: }
1.15 paf 84: }
85:
1.22 paf 86: static void _process(Request& r, const String& method_name, Array *params) {
1.20 paf 87: // calculate pseudo file name of processed chars
88: // would be something like "/some/file(4) process"
1.18 paf 89: char place[MAX_STRING];
90: #ifndef NO_STRING_ORIGIN
1.25 paf 91: const Origin& origin=method_name.origin();
1.18 paf 92: snprintf(place, MAX_STRING, "%s(%d) %s",
93: origin.file, 1+origin.line,
1.22 paf 94: method_name.cstr());
1.18 paf 95: #else
1.22 paf 96: strncpy(place, MAX_STRING, method_name.cstr());
1.18 paf 97: #endif
98:
1.38 paf 99: VStateless_class& self_class=*r.self->get_class();
1.22 paf 100: {
101: // temporary zero @main so to maybe-replace it in processed code
1.50 ! paf 102: Temp_method temp_method_main(self_class, *main_method_name, 0);
! 103: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
! 104: Temp_method temp_method_auto(self_class, *auto_method_name, 0);
1.22 paf 105:
1.25 paf 106: // evaluate source to process
107: const String& source=
108: r.process(*static_cast<Value *>(params->get(0))).as_string();
109:
1.22 paf 110: // process source code, append processed methods to 'self' class
111: // maybe-define new @main
112: r.use_buf(source.cstr(), place, &self_class);
113:
114: // maybe-execute @main[]
115: if(const Method *method=self_class.get_method(*main_method_name)) {
116: // execute!
117: r.execute(*method->parser_code);
118: }
1.18 paf 119: }
120: }
121:
1.26 paf 122: static void _rem(Request& r, const String& method_name, Array *params) {
1.27 paf 123: // forcing ^rem{this param type}
1.26 paf 124: r.fail_if_junction_(false, *static_cast<Value *>(params->get(0)),
125: method_name, "body must be junction");
126: }
1.18 paf 127:
1.27 paf 128: static void _while(Request& r, const String& method_name, Array *params) {
129: Value& vcondition=*static_cast<Value *>(params->get(0));
130: // forcing ^while(this param type){}
131: r.fail_if_junction_(false, vcondition,
132: method_name, "condition must be junction");
133:
134: Value& body=*static_cast<Value *>(params->get(1));
135: // forcing ^while(){this param type}
136: r.fail_if_junction_(false, body,
137: method_name, "body must be junction");
138:
139: // while...
140: int endless_loop_count=0;
141: while(true) {
142: if(++endless_loop_count>=1973) // endless loop?
1.39 paf 143: RTHROW(0, 0,
1.27 paf 144: &method_name,
145: "endless loop detected");
146:
147: bool condition=
148: r.process(
149: vcondition,
150: 0/*no name*/,
151: false/*don't intercept string*/).get_bool();
152: if(!condition) // ...condition is true
153: break;
154:
155: // write processed body
156: r.write_pass_lang(r.process(body));
157: }
158: }
159:
1.28 paf 160: static void _use(Request& r, const String& method_name, Array *params) {
161: Value& vfile=*static_cast<Value *>(params->get(0));
162: // forcing ^rem{this param type}
163: r.fail_if_junction_(true, vfile,
164: method_name, "file name must not be junction");
165:
1.49 paf 166: r.use_file(r.absolute(vfile.as_string()));
1.28 paf 167: }
168:
1.31 paf 169: static void _for(Request& r, const String& method_name, Array *params) {
170: // ^for[i;from-number;to-number-inclusive]{code}[delim]
171:
172: Pool& pool=r.pool();
173: const String& var_name=r.process(*static_cast<Value *>(params->get(0))).as_string();
174: int from=(int)r.process(*static_cast<Value *>(params->get(1))).get_double();
175: int to=(int)r.process(*static_cast<Value *>(params->get(2))).get_double();
176: Value& body_code=*static_cast<Value *>(params->get(3));
177: // forcing ^menu{this param type}
178: r.fail_if_junction_(false, body_code,
179: method_name, "body must be junction");
180: Value *delim_code=params->size()==3+1+1?static_cast<Value *>(params->get(3+1)):0;
181:
182: bool need_delim=false;
1.37 paf 183: VInt *vint=new(pool) VInt(pool, 0);
1.31 paf 184: int endless_loop_count=0;
1.37 paf 185: for(int i=from; i<=to; i++) {
1.31 paf 186: if(++endless_loop_count>=2001) // endless loop?
1.39 paf 187: RTHROW(0, 0,
1.31 paf 188: &method_name,
189: "endless loop detected");
1.37 paf 190: vint->set_int(i);
1.31 paf 191: r.wcontext->put_element(var_name, vint);
192:
193: Value& processed_body=r.process(body_code);
194: if(delim_code) { // delimiter set?
195: const String *string=processed_body.get_string();
196: if(need_delim && string && string->size()) // need delim & iteration produced string?
197: r.write_pass_lang(r.process(*delim_code));
198: need_delim=true;
199: }
200: r.write_pass_lang(processed_body);
201: }
202: }
203:
1.33 paf 204: static void _eval(Request& r, const String& method_name, Array *params) {
205: Value& expr=*static_cast<Value *>(params->get(0));
206: r.fail_if_junction_(false, expr,
207: method_name, "need expression");
208: // evaluate expresion
209: Value *result=r.process(expr,
210: 0/*no name*/,
211: true/*don't intercept string*/).get_expr_result();
212: if(params->size()==2) {
213: Value& fmt=*static_cast<Value *>(params->get(1));
214: // forcing ^format[this param type]
215: r.fail_if_junction_(true, fmt,
216: method_name, "fmt must not be junction");
217:
218: Pool& pool=r.pool();
1.41 paf 219: String& string=*new(pool) String(pool);
220: string.APPEND_CONST(format(pool, result->get_double(), fmt.as_string().cstr()));
221: result=new(pool) VString(string);
1.33 paf 222: }
1.40 paf 223: r.write_no_lang(*result);
1.33 paf 224: }
1.31 paf 225:
226:
1.29 paf 227: typedef double (*math_one_double_op_func_ptr)(double);
228: static double round(double op) { return floor(op+0.5); }
229: static double sign(double op) { return op > 0 ? 1 : ( op < 0 ? -1 : 0 ); }
230:
1.37 paf 231: static void double_one_op(
1.30 paf 232: Request& r,
233: const String& method_name, Array *params,
234: math_one_double_op_func_ptr func) {
1.29 paf 235: Pool& pool=r.pool();
236: Value& param=*static_cast<Value *>(params->get(0));
237:
238: // forcing ^round(this param type)
239: r.fail_if_junction_(false, param,
240: method_name, "parameter must be expression");
241:
242: Value& result=*new(pool) VDouble(pool, (*func)(r.process(param).get_double()));
1.40 paf 243: r.write_no_lang(result);
1.29 paf 244: }
245:
246: static void _round(Request& r, const String& method_name, Array *params) {
1.37 paf 247: double_one_op(r, method_name, params, &round);
1.29 paf 248: }
249:
250: static void _floor(Request& r, const String& method_name, Array *params) {
1.37 paf 251: double_one_op(r, method_name, params, &floor);
1.29 paf 252: }
253:
254: static void _ceiling(Request& r, const String& method_name, Array *params) {
1.37 paf 255: double_one_op(r, method_name, params, &ceil);
1.29 paf 256: }
257:
258: static void _abs(Request& r, const String& method_name, Array *params) {
1.37 paf 259: double_one_op(r, method_name, params, &fabs);
1.29 paf 260: }
261:
262: static void _sign(Request& r, const String& method_name, Array *params) {
1.37 paf 263: double_one_op(r, method_name, params, &sign);
1.29 paf 264: }
1.40 paf 265:
266: // initialize
1.29 paf 267:
1.38 paf 268: void initialize_root_class(Pool& pool, VStateless_class& vclass) {
1.15 paf 269: // ^if(condition){code-when-true}
270: // ^if(condition){code-when-true}{code-when-false}
271: vclass.add_native_method("if", _if, 2, 3);
272:
1.42 paf 273: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.15 paf 274: vclass.add_native_method("untaint", _untaint, 2, 2);
1.42 paf 275:
276: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
277: vclass.add_native_method("taint", _taint, 2, 2);
1.18 paf 278:
279: // ^process[code]
280: vclass.add_native_method("process", _process, 1, 1);
1.26 paf 281:
282: // ^rem{code}
283: vclass.add_native_method("rem", _rem, 1, 1);
1.27 paf 284:
285: // ^while(condition){code}
286: vclass.add_native_method("while", _while, 2, 2);
1.28 paf 287:
288: // ^use[file]
289: vclass.add_native_method("use", _use, 1, 1);
1.29 paf 290:
1.31 paf 291: // ^for[i;from-number;to-number-inclusive]{code}[delim]
292: vclass.add_native_method("for", _for, 3+1, 3+1+1);
1.33 paf 293:
294: // ^eval(expr)
295: // ^eval(expr)[format]
296: vclass.add_native_method("eval", _eval, 1, 2);
1.31 paf 297:
1.29 paf 298:
299: // math functions
300:
301: // ^round(expr)
302: vclass.add_native_method("round", _round, 1, 1);
303:
304: // ^floor(expr)
305: vclass.add_native_method("floor", _floor, 1, 1);
306:
307: // ^ceiling(expr)
308: vclass.add_native_method("ceiling", _ceiling, 1, 1);
309:
310: // ^abs(expr)
311: vclass.add_native_method("abs", _abs, 1, 1);
312:
313: // ^sign(expr)
314: vclass.add_native_method("sign", _sign, 1, 1);
1.1 paf 315: }
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