Annotation of parser3/src/classes/op.C, revision 1.7
1.1 paf 1: /** @file
2: Parser: @b ROOT parser class.
3:
4: Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
5:
6: Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
7:
1.7 ! paf 8: $Id: op.C,v 1.6 2001/04/15 13:12:17 paf Exp $
1.1 paf 9: */
10:
11: #include "pa_config_includes.h"
12: #include <math.h>
13:
14: #include "pa_common.h"
15: #include "pa_request.h"
1.2 paf 16: #include "_op.h"
1.1 paf 17: #include "pa_vint.h"
18: #include "pa_sql_connection.h"
19:
1.5 paf 20: static void _if(Request& r, const String&, MethodParams *params) {
21: Value& condition_code=params->get(0);
1.1 paf 22:
23: bool condition=r.process(condition_code,
24: 0/*no name*/,
25: false/*don't intercept string*/).as_bool();
1.6 paf 26: if(condition)
1.5 paf 27: r.write_pass_lang(r.process(params->get(1)));
1.6 paf 28: else if(params->size()==3)
1.5 paf 29: r.write_pass_lang(r.process(params->get(2)));
1.1 paf 30: }
31:
1.5 paf 32: static void _untaint(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 33: Pool& pool=r.pool();
34:
1.5 paf 35: const String& lang_name=r.process(params->get(0)).as_string();
1.1 paf 36: String::Untaint_lang lang=static_cast<String::Untaint_lang>(
37: untaint_lang_name2enum->get_int(lang_name));
38: if(!lang)
39: PTHROW(0, 0,
40: &lang_name,
41: "invalid untaint language");
42:
43: {
1.5 paf 44: Value& vbody=params->get_junction(1, "body must be code");
1.1 paf 45:
46: Temp_lang temp_lang(r, lang); // set temporarily specified ^untaint[language;
1.5 paf 47: r.write_pass_lang(r.process(vbody)); // process marking tainted with that lang
1.1 paf 48: }
49: }
50:
1.5 paf 51: static void _taint(Request& r, const String&, MethodParams *params) {
1.1 paf 52: Pool& pool=r.pool();
53:
54: String::Untaint_lang lang;
55: if(params->size()==1)
56: lang=String::UL_TAINTED; // mark as simply 'tainted'. useful in table:set
57: else {
1.3 paf 58: const String& lang_name=
1.5 paf 59: r.process(params->get(0)).as_string();
1.1 paf 60: lang=static_cast<String::Untaint_lang>(
61: untaint_lang_name2enum->get_int(lang_name));
62: if(!lang)
63: PTHROW(0, 0,
1.3 paf 64: &lang_name,
65: "invalid taint language");
1.1 paf 66: }
67:
68: {
1.5 paf 69: Value& vbody=params->get_no_junction(params->size()-1, "body must not be code");
1.1 paf 70:
71: String result(r.pool());
72: result.append(
73: vbody.as_string(), // process marking tainted with that lang
74: lang, true); // force result language to specified
75: r.write_pass_lang(result);
76: }
77: }
78:
1.5 paf 79: static void _process(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 80: // calculate pseudo file name of processed chars
81: // would be something like "/some/file(4) process"
82: char place[MAX_STRING];
83: #ifndef NO_STRING_ORIGIN
84: const Origin& origin=method_name.origin();
85: snprintf(place, MAX_STRING, "%s(%d) %s",
86: origin.file, 1+origin.line,
87: method_name.cstr());
88: #else
89: strncpy(place, MAX_STRING, method_name.cstr());
90: #endif
91:
92: VStateless_class& self_class=*r.self->get_class();
93: {
94: // temporary zero @main so to maybe-replace it in processed code
95: Temp_method temp_method_main(self_class, *main_method_name, 0);
96: // temporary zero @auto so it wouldn't be auto-called in Request::use_buf
97: Temp_method temp_method_auto(self_class, *auto_method_name, 0);
98:
99: // evaluate source to process
100: const String& source=
1.5 paf 101: r.process(params->get(0)).as_string();
1.1 paf 102:
103: // process source code, append processed methods to 'self' class
104: // maybe-define new @main
105: r.use_buf(source.cstr(), place, &self_class);
106:
107: // maybe-execute @main[]
108: if(const Method *method=self_class.get_method(*main_method_name)) {
109: // execute!
110: r.execute(*method->parser_code);
111: }
112: }
113: }
114:
1.5 paf 115: static void _rem(Request& r, const String&, MethodParams *params) {
116: params->get_junction(0, "body must be code");
1.1 paf 117: }
118:
1.5 paf 119: static void _while(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 120: Pool& pool=r.pool();
121:
1.5 paf 122: Value& vcondition=params->get_junction(0, "condition must be expression");
123: Value& body=params->get_junction(1, "body must be code");
1.1 paf 124:
125: // while...
126: int endless_loop_count=0;
127: while(true) {
128: if(++endless_loop_count>=1973) // endless loop?
129: PTHROW(0, 0,
130: &method_name,
131: "endless loop detected");
132:
133: bool condition=
134: r.process(
135: vcondition,
136: 0/*no name*/,
137: false/*don't intercept string*/).as_bool();
138: if(!condition) // ...condition is true
139: break;
140:
141: // write processed body
142: r.write_pass_lang(r.process(body));
143: }
144: }
145:
1.5 paf 146: static void _use(Request& r, const String& method_name, MethodParams *params) {
147: Value& vfile=params->get_no_junction(0, "file name must not be code");
1.1 paf 148: r.use_file(r.absolute(vfile.as_string()));
149: }
150:
1.4 paf 151: /// ^for[i;from-number;to-number-inclusive]{code}[delim]
1.5 paf 152: static void _for(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 153: Pool& pool=r.pool();
1.5 paf 154: const String& var_name=r.process(params->get(0)).as_string();
155: int from=(int)r.process(params->get(1)).as_double();
156: int to=(int)r.process(params->get(2)).as_double();
157: Value& body_code=params->get_junction(3, "body must be code");
158: Value *delim_code=params->size()==3+1+1?¶ms->get(3+1):0;
1.1 paf 159:
160: bool need_delim=false;
161: VInt *vint=new(pool) VInt(pool, 0);
162: int endless_loop_count=0;
163: for(int i=from; i<=to; i++) {
164: if(++endless_loop_count>=2001) // endless loop?
165: PTHROW(0, 0,
166: &method_name,
167: "endless loop detected");
168: vint->set_int(i);
1.4 paf 169: r.root->put_element(var_name, vint);
1.1 paf 170:
171: Value& processed_body=r.process(body_code);
172: if(delim_code) { // delimiter set?
173: const String *string=processed_body.get_string();
174: if(need_delim && string && string->size()) // need delim & iteration produced string?
175: r.write_pass_lang(r.process(*delim_code));
176: need_delim=true;
177: }
178: r.write_pass_lang(processed_body);
179: }
180: }
181:
1.5 paf 182: static void _eval(Request& r, const String&, MethodParams *params) {
183: Value& expr=params->get_junction(0, "need expression");
1.1 paf 184: // evaluate expresion
185: Value *result=r.process(expr,
186: 0/*no name*/,
187: true/*don't intercept string*/).as_expr_result();
188: if(params->size()==2) {
1.5 paf 189: Value& fmt=params->get_no_junction(1, "fmt must not be code");
1.1 paf 190:
191: Pool& pool=r.pool();
192: String& string=*new(pool) String(pool);
193: string.APPEND_CONST(format(pool, result->as_double(), fmt.as_string().cstr()));
194: result=new(pool) VString(string);
195: }
196: r.write_no_lang(*result);
197: }
198:
199:
200: typedef double (*math_one_double_op_func_ptr)(double);
201: static double round(double op) { return floor(op+0.5); }
202: static double sign(double op) { return op > 0 ? 1 : ( op < 0 ? -1 : 0 ); }
203:
204: static void double_one_op(
205: Request& r,
1.5 paf 206: const String& method_name, MethodParams *params,
1.1 paf 207: math_one_double_op_func_ptr func) {
208: Pool& pool=r.pool();
1.5 paf 209: Value& param=params->get_junction(0, "parameter must be expression");
1.1 paf 210:
211: Value& result=*new(pool) VDouble(pool, (*func)(r.process(param).as_double()));
212: r.write_no_lang(result);
213: }
214:
1.5 paf 215: static void _round(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 216: double_one_op(r, method_name, params, &round);
217: }
218:
1.5 paf 219: static void _floor(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 220: double_one_op(r, method_name, params, &floor);
221: }
222:
1.5 paf 223: static void _ceiling(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 224: double_one_op(r, method_name, params, &ceil);
225: }
226:
1.5 paf 227: static void _abs(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 228: double_one_op(r, method_name, params, &fabs);
229: }
230:
1.5 paf 231: static void _sign(Request& r, const String& method_name, MethodParams *params) {
1.1 paf 232: double_one_op(r, method_name, params, &sign);
233: }
234:
235: /// ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
1.5 paf 236: static void _connect(Request& r, const String&, MethodParams *params) {
1.1 paf 237: Pool& pool=r.pool();
238:
1.5 paf 239: Value& url=params->get_no_junction(0, "url must not be code");
240: Value& body_code=params->get_junction(1, "body must be code");
1.1 paf 241:
242: // connect
243: SQL_Connection& connection=SQL_driver_manager->get_connection(
244: url.as_string(), r.protocol2library);
245:
246: Exception rethrow_me;
247: // remember/set current connection
248: SQL_Connection *saved_connection=r.connection;
249: r.connection=&connection;
250: // execute body
251: bool body_failed=false;
252: PTRY
253: r.write_assign_lang(r.process(body_code));
254: PCATCH(e) { // connect/process problem
255: rethrow_me=e; body_failed=true;
256: }
257: PEND_CATCH
258:
259: bool finalizer_failed=false;
260: PTRY
261: // FINALLY
262: if(body_failed)
263: connection.rollback();
264: else
265: connection.commit();
266: PCATCH(e) { // commit/rollback problem
267: rethrow_me=e; finalizer_failed=true;
268: }
269: PEND_CATCH
270:
271: // close connection [cache it]
272: connection.close();
273: // recall current connection from remembered
274: r.connection=saved_connection;
275:
276: if(body_failed || finalizer_failed) // were there an exception for us to rethrow?
277: PTHROW(rethrow_me.type(), rethrow_me.code(),
278: rethrow_me.problem_source(),
279: rethrow_me.comment());
280: }
281:
282: // initialize
283:
1.2 paf 284: void initialize_op_class(Pool& pool, VStateless_class& vclass) {
1.1 paf 285: // ^if(condition){code-when-true}
286: // ^if(condition){code-when-true}{code-when-false}
287: vclass.add_native_method("if", Method::CT_ANY, _if, 2, 3);
288:
289: // ^untaint[as-is|uri|sql|js|html|html-typo]{code}
290: vclass.add_native_method("untaint", Method::CT_ANY, _untaint, 2, 2);
291:
292: // ^taint[as-is|uri|sql|js|html|html-typo]{code}
293: vclass.add_native_method("taint", Method::CT_ANY, _taint, 1, 2);
294:
295: // ^process[code]
296: vclass.add_native_method("process", Method::CT_ANY, _process, 1, 1);
297:
298: // ^rem{code}
299: vclass.add_native_method("rem", Method::CT_ANY, _rem, 1, 1);
300:
301: // ^while(condition){code}
302: vclass.add_native_method("while", Method::CT_ANY, _while, 2, 2);
303:
304: // ^use[file]
305: vclass.add_native_method("use", Method::CT_ANY, _use, 1, 1);
306:
307: // ^for[i;from-number;to-number-inclusive]{code}[delim]
308: vclass.add_native_method("for", Method::CT_ANY, _for, 3+1, 3+1+1);
309:
310: // ^eval(expr)
311: // ^eval(expr)[format]
312: vclass.add_native_method("eval", Method::CT_ANY, _eval, 1, 2);
313:
314:
315: // math functions
316:
317: // ^round(expr)
318: vclass.add_native_method("round", Method::CT_ANY, _round, 1, 1);
319:
320: // ^floor(expr)
321: vclass.add_native_method("floor", Method::CT_ANY, _floor, 1, 1);
322:
323: // ^ceiling(expr)
324: vclass.add_native_method("ceiling", Method::CT_ANY, _ceiling, 1, 1);
325:
326: // ^abs(expr)
327: vclass.add_native_method("abs", Method::CT_ANY, _abs, 1, 1);
328:
329: // ^sign(expr)
330: vclass.add_native_method("sign", Method::CT_ANY, _sign, 1, 1);
331:
332:
333: // connect
334:
335: // ^connect[protocol://user:pass@host[:port]/database]{code with ^sql-s}
336: vclass.add_native_method("connect", Method::CT_ANY, _connect, 2, 2);
337:
338: }
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