Annotation of parser3/src/classes/root.C, revision 1.46.2.1
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:
1.46.2.1! paf 6: $Id: root.C,v 1.46 2001/03/19 16:06:13 paf Exp $
1.1 paf 7: */
8:
1.18 paf 9: #include <string.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
1.46.2.1! 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
102: Temp_method temp_method(self_class, *main_method_name, 0);
103:
1.25 paf 104: // evaluate source to process
105: const String& source=
106: r.process(*static_cast<Value *>(params->get(0))).as_string();
107:
1.22 paf 108: // process source code, append processed methods to 'self' class
109: // maybe-define new @main
110: r.use_buf(source.cstr(), place, &self_class);
111:
112: // maybe-execute @main[]
113: if(const Method *method=self_class.get_method(*main_method_name)) {
114: // execute!
115: r.execute(*method->parser_code);
116: }
1.18 paf 117: }
118: }
119:
1.26 paf 120: static void _rem(Request& r, const String& method_name, Array *params) {
1.27 paf 121: // forcing ^rem{this param type}
1.26 paf 122: r.fail_if_junction_(false, *static_cast<Value *>(params->get(0)),
123: method_name, "body must be junction");
124: }
1.18 paf 125:
1.27 paf 126: static void _while(Request& r, const String& method_name, Array *params) {
127: Value& vcondition=*static_cast<Value *>(params->get(0));
128: // forcing ^while(this param type){}
129: r.fail_if_junction_(false, vcondition,
130: method_name, "condition must be junction");
131:
132: Value& body=*static_cast<Value *>(params->get(1));
133: // forcing ^while(){this param type}
134: r.fail_if_junction_(false, body,
135: method_name, "body must be junction");
136:
137: // while...
138: int endless_loop_count=0;
139: while(true) {
140: if(++endless_loop_count>=1973) // endless loop?
1.39 paf 141: RTHROW(0, 0,
1.27 paf 142: &method_name,
143: "endless loop detected");
144:
145: bool condition=
146: r.process(
147: vcondition,
148: 0/*no name*/,
149: false/*don't intercept string*/).get_bool();
150: if(!condition) // ...condition is true
151: break;
152:
153: // write processed body
154: r.write_pass_lang(r.process(body));
155: }
156: }
157:
1.28 paf 158: static void _use(Request& r, const String& method_name, Array *params) {
159: Value& vfile=*static_cast<Value *>(params->get(0));
160: // forcing ^rem{this param type}
161: r.fail_if_junction_(true, vfile,
162: method_name, "file name must not be junction");
163:
164: char *file=vfile.as_string().cstr();
165: r.use_file(r.absolute(file));
166: }
167:
1.31 paf 168: static void _for(Request& r, const String& method_name, Array *params) {
169: // ^for[i;from-number;to-number-inclusive]{code}[delim]
170:
171: Pool& pool=r.pool();
172: const String& var_name=r.process(*static_cast<Value *>(params->get(0))).as_string();
173: int from=(int)r.process(*static_cast<Value *>(params->get(1))).get_double();
174: int to=(int)r.process(*static_cast<Value *>(params->get(2))).get_double();
175: Value& body_code=*static_cast<Value *>(params->get(3));
176: // forcing ^menu{this param type}
177: r.fail_if_junction_(false, body_code,
178: method_name, "body must be junction");
179: Value *delim_code=params->size()==3+1+1?static_cast<Value *>(params->get(3+1)):0;
180:
181: bool need_delim=false;
1.37 paf 182: VInt *vint=new(pool) VInt(pool, 0);
1.31 paf 183: int endless_loop_count=0;
1.37 paf 184: for(int i=from; i<=to; i++) {
1.31 paf 185: if(++endless_loop_count>=2001) // endless loop?
1.39 paf 186: RTHROW(0, 0,
1.31 paf 187: &method_name,
188: "endless loop detected");
1.37 paf 189: vint->set_int(i);
1.31 paf 190: r.wcontext->put_element(var_name, vint);
191:
192: Value& processed_body=r.process(body_code);
193: if(delim_code) { // delimiter set?
194: const String *string=processed_body.get_string();
195: if(need_delim && string && string->size()) // need delim & iteration produced string?
196: r.write_pass_lang(r.process(*delim_code));
197: need_delim=true;
198: }
199: r.write_pass_lang(processed_body);
200: }
201: }
202:
1.33 paf 203: static void _eval(Request& r, const String& method_name, Array *params) {
204: Value& expr=*static_cast<Value *>(params->get(0));
205: r.fail_if_junction_(false, expr,
206: method_name, "need expression");
207: // evaluate expresion
208: Value *result=r.process(expr,
209: 0/*no name*/,
210: true/*don't intercept string*/).get_expr_result();
211: if(params->size()==2) {
212: Value& fmt=*static_cast<Value *>(params->get(1));
213: // forcing ^format[this param type]
214: r.fail_if_junction_(true, fmt,
215: method_name, "fmt must not be junction");
216:
217: Pool& pool=r.pool();
1.41 paf 218: String& string=*new(pool) String(pool);
219: string.APPEND_CONST(format(pool, result->get_double(), fmt.as_string().cstr()));
220: result=new(pool) VString(string);
1.33 paf 221: }
1.40 paf 222: r.write_no_lang(*result);
1.33 paf 223: }
1.31 paf 224:
225:
1.29 paf 226: typedef double (*math_one_double_op_func_ptr)(double);
227: static double round(double op) { return floor(op+0.5); }
228: static double sign(double op) { return op > 0 ? 1 : ( op < 0 ? -1 : 0 ); }
229:
1.37 paf 230: static void double_one_op(
1.30 paf 231: Request& r,
232: const String& method_name, Array *params,
233: math_one_double_op_func_ptr func) {
1.29 paf 234: Pool& pool=r.pool();
235: Value& param=*static_cast<Value *>(params->get(0));
236:
237: // forcing ^round(this param type)
238: r.fail_if_junction_(false, param,
239: method_name, "parameter must be expression");
240:
241: Value& result=*new(pool) VDouble(pool, (*func)(r.process(param).get_double()));
1.40 paf 242: r.write_no_lang(result);
1.29 paf 243: }
244:
245: static void _round(Request& r, const String& method_name, Array *params) {
1.37 paf 246: double_one_op(r, method_name, params, &round);
1.29 paf 247: }
248:
249: static void _floor(Request& r, const String& method_name, Array *params) {
1.37 paf 250: double_one_op(r, method_name, params, &floor);
1.29 paf 251: }
252:
253: static void _ceiling(Request& r, const String& method_name, Array *params) {
1.37 paf 254: double_one_op(r, method_name, params, &ceil);
1.29 paf 255: }
256:
257: static void _abs(Request& r, const String& method_name, Array *params) {
1.37 paf 258: double_one_op(r, method_name, params, &fabs);
1.29 paf 259: }
260:
261: static void _sign(Request& r, const String& method_name, Array *params) {
1.37 paf 262: double_one_op(r, method_name, params, &sign);
1.29 paf 263: }
1.40 paf 264:
265: // initialize
1.29 paf 266:
1.38 paf 267: void initialize_root_class(Pool& pool, VStateless_class& vclass) {
1.15 paf 268: // ^if(condition){code-when-true}
269: // ^if(condition){code-when-true}{code-when-false}
270: vclass.add_native_method("if", _if, 2, 3);
271:
1.42 paf 272: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
1.15 paf 273: vclass.add_native_method("untaint", _untaint, 2, 2);
1.42 paf 274:
275: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
276: vclass.add_native_method("taint", _taint, 2, 2);
1.18 paf 277:
278: // ^process[code]
279: vclass.add_native_method("process", _process, 1, 1);
1.26 paf 280:
281: // ^rem{code}
282: vclass.add_native_method("rem", _rem, 1, 1);
1.27 paf 283:
284: // ^while(condition){code}
285: vclass.add_native_method("while", _while, 2, 2);
1.28 paf 286:
287: // ^use[file]
288: vclass.add_native_method("use", _use, 1, 1);
1.29 paf 289:
1.31 paf 290: // ^for[i;from-number;to-number-inclusive]{code}[delim]
291: vclass.add_native_method("for", _for, 3+1, 3+1+1);
1.33 paf 292:
293: // ^eval(expr)
294: // ^eval(expr)[format]
295: vclass.add_native_method("eval", _eval, 1, 2);
1.31 paf 296:
1.29 paf 297:
298: // math functions
299:
300: // ^round(expr)
301: vclass.add_native_method("round", _round, 1, 1);
302:
303: // ^floor(expr)
304: vclass.add_native_method("floor", _floor, 1, 1);
305:
306: // ^ceiling(expr)
307: vclass.add_native_method("ceiling", _ceiling, 1, 1);
308:
309: // ^abs(expr)
310: vclass.add_native_method("abs", _abs, 1, 1);
311:
312: // ^sign(expr)
313: vclass.add_native_method("sign", _sign, 1, 1);
1.1 paf 314: }
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