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