Annotation of parser3/src/classes/root.C, revision 1.31
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:
1.31 ! paf 6: $Id: root.C,v 1.30 2001/03/12 20:36:52 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"
1.1 paf 15:
1.18 paf 16: static void _if(Request& r, const String&, Array *params) {
1.2 paf 17: bool condition=
1.18 paf 18: r.process(
1.6 paf 19: *static_cast<Value *>(params->get(0)),
1.11 paf 20: 0/*no name*/,
1.14 paf 21: false/*don't intercept string*/).get_bool();
1.6 paf 22: if(condition) {
1.18 paf 23: Value& value=r.process(*static_cast<Value *>(params->get(1)));
1.22 paf 24: r.write_pass_lang(value);
1.6 paf 25: } else if(params->size()==3) {
1.18 paf 26: Value& value=r.process(*static_cast<Value *>(params->get(2)));
1.22 paf 27: r.write_pass_lang(value);
1.6 paf 28: }
1.1 paf 29: }
30:
1.22 paf 31: static void _untaint(Request& r, const String& method_name, Array *params) {
1.18 paf 32: const String& lang_name=r.process(*static_cast<Value *>(params->get(0))).as_string();
1.15 paf 33: String::Untaint_lang lang=static_cast<String::Untaint_lang>(
1.23 paf 34: untaint_lang_name2enum->get_int(lang_name));
1.15 paf 35: if(!lang)
36: R_THROW(0, 0,
37: &lang_name,
1.18 paf 38: "invalid untaint language");
1.15 paf 39:
1.24 paf 40: {
41: Temp_lang temp_lang(r, lang);
42: Value *vbody=static_cast<Value *>(params->get(1));
43: // forcing ^untaint[]{this param type}
1.26 paf 44: r.fail_if_junction_(false, *vbody,
45: method_name, "body must be junction");
1.24 paf 46:
47: r.write_pass_lang(r.process(*vbody));
48: }
1.15 paf 49: }
50:
51:
1.22 paf 52: static void _process(Request& r, const String& method_name, Array *params) {
1.20 paf 53: // calculate pseudo file name of processed chars
54: // would be something like "/some/file(4) process"
1.18 paf 55: char place[MAX_STRING];
56: #ifndef NO_STRING_ORIGIN
1.25 paf 57: const Origin& origin=method_name.origin();
1.18 paf 58: snprintf(place, MAX_STRING, "%s(%d) %s",
59: origin.file, 1+origin.line,
1.22 paf 60: method_name.cstr());
1.18 paf 61: #else
1.22 paf 62: strncpy(place, MAX_STRING, method_name.cstr());
1.18 paf 63: #endif
64:
1.20 paf 65: VClass& self_class=*r.self->get_class();
1.22 paf 66: {
67: // temporary zero @main so to maybe-replace it in processed code
68: Temp_method temp_method(self_class, *main_method_name, 0);
69:
1.25 paf 70: // evaluate source to process
71: const String& source=
72: r.process(*static_cast<Value *>(params->get(0))).as_string();
73:
1.22 paf 74: // process source code, append processed methods to 'self' class
75: // maybe-define new @main
76: r.use_buf(source.cstr(), place, &self_class);
77:
78: // maybe-execute @main[]
79: if(const Method *method=self_class.get_method(*main_method_name)) {
80: // execute!
81: r.execute(*method->parser_code);
82: }
1.18 paf 83: }
84: }
85:
1.26 paf 86: static void _rem(Request& r, const String& method_name, Array *params) {
1.27 paf 87: // forcing ^rem{this param type}
1.26 paf 88: r.fail_if_junction_(false, *static_cast<Value *>(params->get(0)),
89: method_name, "body must be junction");
90: }
1.18 paf 91:
1.27 paf 92: static void _while(Request& r, const String& method_name, Array *params) {
93: Value& vcondition=*static_cast<Value *>(params->get(0));
94: // forcing ^while(this param type){}
95: r.fail_if_junction_(false, vcondition,
96: method_name, "condition must be junction");
97:
98: Value& body=*static_cast<Value *>(params->get(1));
99: // forcing ^while(){this param type}
100: r.fail_if_junction_(false, body,
101: method_name, "body must be junction");
102:
103: // while...
104: int endless_loop_count=0;
105: while(true) {
106: if(++endless_loop_count>=1973) // endless loop?
107: R_THROW(0, 0,
108: &method_name,
109: "endless loop detected");
110:
111: bool condition=
112: r.process(
113: vcondition,
114: 0/*no name*/,
115: false/*don't intercept string*/).get_bool();
116: if(!condition) // ...condition is true
117: break;
118:
119: // write processed body
120: r.write_pass_lang(r.process(body));
121: }
122: }
123:
1.28 paf 124: static void _use(Request& r, const String& method_name, Array *params) {
125: Value& vfile=*static_cast<Value *>(params->get(0));
126: // forcing ^rem{this param type}
127: r.fail_if_junction_(true, vfile,
128: method_name, "file name must not be junction");
129:
130: char *file=vfile.as_string().cstr();
131: r.use_file(r.absolute(file));
132: }
133:
1.31 ! paf 134: static void _for(Request& r, const String& method_name, Array *params) {
! 135: // ^for[i;from-number;to-number-inclusive]{code}[delim]
! 136:
! 137: Pool& pool=r.pool();
! 138: const String& var_name=r.process(*static_cast<Value *>(params->get(0))).as_string();
! 139: int from=(int)r.process(*static_cast<Value *>(params->get(1))).get_double();
! 140: int to=(int)r.process(*static_cast<Value *>(params->get(2))).get_double();
! 141: Value& body_code=*static_cast<Value *>(params->get(3));
! 142: // forcing ^menu{this param type}
! 143: r.fail_if_junction_(false, body_code,
! 144: method_name, "body must be junction");
! 145: Value *delim_code=params->size()==3+1+1?static_cast<Value *>(params->get(3+1)):0;
! 146:
! 147: bool need_delim=false;
! 148: int endless_loop_count=0;
! 149: for(VInt *vint=new(pool) VInt(pool, from); vint->get_int()<=to; vint->inc()) {
! 150: if(++endless_loop_count>=2001) // endless loop?
! 151: R_THROW(0, 0,
! 152: &method_name,
! 153: "endless loop detected");
! 154: r.wcontext->put_element(var_name, vint);
! 155:
! 156: Value& processed_body=r.process(body_code);
! 157: if(delim_code) { // delimiter set?
! 158: const String *string=processed_body.get_string();
! 159: if(need_delim && string && string->size()) // need delim & iteration produced string?
! 160: r.write_pass_lang(r.process(*delim_code));
! 161: need_delim=true;
! 162: }
! 163: r.write_pass_lang(processed_body);
! 164: }
! 165: }
! 166:
! 167:
! 168:
1.29 paf 169: typedef double (*math_one_double_op_func_ptr)(double);
170: static double round(double op) { return floor(op+0.5); }
171: static double sign(double op) { return op > 0 ? 1 : ( op < 0 ? -1 : 0 ); }
172:
173: static void _math_one_double_op(
1.30 paf 174: Request& r,
175: const String& method_name, Array *params,
176: math_one_double_op_func_ptr func) {
1.29 paf 177: Pool& pool=r.pool();
178: Value& param=*static_cast<Value *>(params->get(0));
179:
180: // forcing ^round(this param type)
181: r.fail_if_junction_(false, param,
182: method_name, "parameter must be expression");
183:
184: Value& result=*new(pool) VDouble(pool, (*func)(r.process(param).get_double()));
185: r.wcontext->write(result, String::Untaint_lang::NO /*always object, not string*/);
186: }
187:
188: static void _round(Request& r, const String& method_name, Array *params) {
189: _math_one_double_op(r, method_name, params, &round);
190: }
191:
192: static void _floor(Request& r, const String& method_name, Array *params) {
193: _math_one_double_op(r, method_name, params, &floor);
194: }
195:
196: static void _ceiling(Request& r, const String& method_name, Array *params) {
197: _math_one_double_op(r, method_name, params, &ceil);
198: }
199:
200: static void _abs(Request& r, const String& method_name, Array *params) {
201: _math_one_double_op(r, method_name, params, &fabs);
202: }
203:
204: static void _sign(Request& r, const String& method_name, Array *params) {
205: _math_one_double_op(r, method_name, params, &sign);
206: }
207:
1.7 paf 208: void initialize_root_class(Pool& pool, VClass& vclass) {
1.15 paf 209: // ^if(condition){code-when-true}
210: // ^if(condition){code-when-true}{code-when-false}
211: vclass.add_native_method("if", _if, 2, 3);
212:
213: // ^untaint[as-is|sql|js|html|html-typo]{code}
214: vclass.add_native_method("untaint", _untaint, 2, 2);
1.18 paf 215:
216: // ^process[code]
217: vclass.add_native_method("process", _process, 1, 1);
1.26 paf 218:
219: // ^rem{code}
220: vclass.add_native_method("rem", _rem, 1, 1);
1.27 paf 221:
222: // ^while(condition){code}
223: vclass.add_native_method("while", _while, 2, 2);
1.28 paf 224:
225: // ^use[file]
226: vclass.add_native_method("use", _use, 1, 1);
1.29 paf 227:
1.31 ! paf 228: // ^for[i;from-number;to-number-inclusive]{code}[delim]
! 229: vclass.add_native_method("for", _for, 3+1, 3+1+1);
! 230:
1.29 paf 231:
232: // math functions
233:
234: // ^round(expr)
235: vclass.add_native_method("round", _round, 1, 1);
236:
237: // ^floor(expr)
238: vclass.add_native_method("floor", _floor, 1, 1);
239:
240: // ^ceiling(expr)
241: vclass.add_native_method("ceiling", _ceiling, 1, 1);
242:
243: // ^abs(expr)
244: vclass.add_native_method("abs", _abs, 1, 1);
245:
246: // ^sign(expr)
247: vclass.add_native_method("sign", _sign, 1, 1);
1.1 paf 248: }
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