Annotation of parser3/src/classes/math.C, revision 1.24.2.12.2.5
1.1 parser 1: /** @file
2: Parser: @b math parser class.
3:
1.24.2.2 paf 4: Copyright(c) 2001-2003 ArtLebedev Group(http://www.artlebedev.com)
1.20 paf 5: Author: Alexandr Petrosian <paf@design.ru>(http://paf.design.ru)
1.22 paf 6: */
1.1 parser 7:
1.24.2.12.2.5! (paf 8:: static const char* IDENT_MATH_C="$Date: 2003/03/21 13:42:27 $";
1.24.2.4 paf 9:
10: #include "pa_vmethod_frame.h"
1.1 parser 11:
12: #include "pa_common.h"
13: #include "pa_vint.h"
1.2 parser 14: #include "pa_vmath.h"
1.1 parser 15: #include "pa_request.h"
1.19 paf 16: #include "pa_md5.h"
1.1 parser 17:
1.5 parser 18: #ifdef WIN32
1.19 paf 19: // for threadID
1.5 parser 20: # include <windows.h>
21: #endif
22:
1.24.2.12 paf 23: #ifdef HAVE_CRYPT
24: # ifdef HAVE_CRYPT_H
25: # include <crypt.h>
26: # endif
27: #else
1.24.2.12.2.3 (paf 28:: extern char *crypt(const char* , const char* );
1.20 paf 29: #endif
30:
1.1 parser 31: // defines
32:
1.20 paf 33: #define MAX_SALT 8
1.1 parser 34:
35: // class
36:
1.24.2.8 paf 37: class MMath: public Methoded {
1.1 parser 38: public:
1.24.2.6 paf 39: MMath();
1.5 parser 40: void configure_admin(Request& r);
41:
1.1 parser 42: public: // Methoded
1.15 paf 43: bool used_directly() { return false; }
1.1 parser 44: };
45:
1.24.2.6 paf 46: // global variables
47:
1.24.2.10 paf 48: DECLARE_CLASS_VAR(math, 0 /*fictive*/, new MMath);
1.24.2.6 paf 49:
1.1 parser 50: // methods
1.5 parser 51: static unsigned int randomizer=0;
1.20 paf 52: static inline int _random(uint top) {
53: return (int)(((double)((randomizer=rand())% RAND_MAX)) / RAND_MAX * top );
54: }
1.24.2.12.2.5! (paf 55:: static void _random(Request& r, MethodParams* params) {
1.1 parser 56:
1.24.2.12.2.4 (paf 57:: Value* range=params->as_junction(0, "range must be expression");
1.24.2.6 paf 58: double top=r.process_to_value(range)->as_double();
1.14 paf 59: if(top<=1)
1.16 paf 60: throw Exception("parser.runtime",
1.24.2.5 paf 61: method_name,
1.20 paf 62: "top must be above 1(%g)", top);
1.1 parser 63:
1.24.2.12.2.4 (paf 64:: r.write_no_lang(Value*(new VInt(_random(uint(top)))));
1.1 parser 65: }
66:
67:
1.20 paf 68: typedef double(*math1_func_ptr)(double);
1.3 parser 69: static double frac(double param) { return param-trunc(param); }
70: static double degrees(double param) { return param /PI *180; }
71: static double radians(double param) { return param /180 *PI; }
1.1 parser 72:
73: static void math1(Request& r,
1.24.2.12.2.1 (paf 74:: const String& method_name, MethodParams* params,
1.1 parser 75: math1_func_ptr func) {
1.24.2.12.2.4 (paf 76:: Value* param=params->as_junction(0, "parameter must be expression");
1.1 parser 77:
1.24.2.6 paf 78: double result=func(r.process_to_value(param)->as_double());
1.24.2.12.2.4 (paf 79:: r.write_no_lang(Value*(new VDouble(result)));
1.1 parser 80: }
81:
82: #define MATH1(name) \
1.24.2.12.2.5! (paf 83:: static void _##name(Request& r, MethodParams* params) {\
1.1 parser 84: math1(r, method_name, params, &name);\
85: }
86: #define MATH1P(name_parser, name_c) \
1.24.2.12.2.5! (paf 87:: static void _##name_parser(Request& r, MethodParams* params) {\
1.1 parser 88: math1(r, method_name, params, &name_c);\
89: }
90: MATH1(round); MATH1(floor); MATH1P(ceiling, ceil);
1.3 parser 91: MATH1(trunc); MATH1(frac);
1.1 parser 92: MATH1P(abs, fabs); MATH1(sign);
93: MATH1(exp); MATH1(log);
94: MATH1(sin); MATH1(asin);
95: MATH1(cos); MATH1(acos);
96: MATH1(tan); MATH1(atan);
1.3 parser 97: MATH1(degrees); MATH1(radians);
1.1 parser 98: MATH1(sqrt);
99:
100:
101: typedef double (*math2_func_ptr)(double, double);
102: static void math2(Request& r,
1.24.2.12.2.1 (paf 103:: const String& method_name, MethodParams* params,
1.1 parser 104: math2_func_ptr func) {
1.24.2.12.2.4 (paf 105:: Value* a=params->as_junction(0, "parameter must be expression");
106:: Value* b=params->as_junction(1, "parameter must be expression");
1.1 parser 107:
1.24.2.6 paf 108: double result=func(
109: r.process_to_value(a)->as_double(),
110: r.process_to_value(b)->as_double());
1.24.2.12.2.4 (paf 111:: r.write_no_lang(Value*(new VDouble(result)));
1.1 parser 112: }
113:
114: #define MATH2(name) \
1.24.2.12.2.5! (paf 115:: static void _##name(Request& r, MethodParams* params) {\
1.1 parser 116: math2(r, method_name, params, &name);\
117: }
118: MATH2(pow);
119:
1.20 paf 120: inline bool is_salt_body_char(int c) {
121: return isalnum(c) || c == '.' || c=='/';
122: }
1.24.2.2 paf 123: static size_t calc_prefix_size(const char* salt) {
1.20 paf 124: if(size_t salt_size=strlen(salt)) {
125: if(!is_salt_body_char(salt[0])) { // $... {...
1.24.2.2 paf 126: const char* cur=salt+1; // skip
1.20 paf 127: while(is_salt_body_char(*cur++)) // ...$ ...}
128: ;
129: return cur-salt;
130: } else
131: return 0;
132: } else
133: return 0;
134: }
1.24.2.12.2.5! (paf 135:: static void _crypt(Request& r, MethodParams* params) {
1.24.2.12.2.1 (paf 136:: const char* password=params->as_string(0, "password must be string")->cstr();
137:: const char* maybe_bodyless_salt=params->as_string(1, "salt must be string")->cstr();
1.20 paf 138:
139: size_t prefix_size=calc_prefix_size(maybe_bodyless_salt);
1.24.2.2 paf 140: const char* normal_salt;
1.20 paf 141: char normalize_buf[MAX_STRING];
142: if(prefix_size==strlen(maybe_bodyless_salt)) { // bodyless?
143: strncpy(normalize_buf, maybe_bodyless_salt, MAX_STRING-MAX_SALT-1);
144: char *cur=normalize_buf+strlen(normalize_buf);
145: // sould add up MAX_SALT random chars
146: static unsigned char itoa64[] = /* 0 ... 63 => ASCII - 64 */
147: "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
148: for(int i=0; i<MAX_SALT; i++)
149: *cur++=itoa64[_random(64)];
150: *cur=0;
151: normal_salt=normalize_buf;
152: } else
153: normal_salt=maybe_bodyless_salt;
1.19 paf 154:
155: /* FreeBSD style MD5 string
156: */
1.20 paf 157: if(strncmp(normal_salt, PA_MD5PW_ID, PA_MD5PW_IDLEN) == 0) {
1.19 paf 158: const size_t sample_size=120;
1.24.2.12.2.1 (paf 159:: char *sample_buf=new char[sample_size];
1.24.2.6 paf 160: pa_MD5Encode((const unsigned char *)password.get(),
1.20 paf 161: (const unsigned char *)normal_salt, sample_buf, sample_size);
1.24.2.6 paf 162: String sample(sample_buf);
163: r.write_pass_lang(sample);
1.20 paf 164: } else {
165: #ifdef HAVE_CRYPT
1.24.2.6 paf 166: const char* static_sample_buf=crypt(password, normal_salt);
167: if(!static_sample_buf // nothing generated
168: || !static_sample_buf[0] // generated nothing
169: || strncmp(static_sample_buf, normal_salt, prefix_size)!=0) // salt prefix not preserved
1.20 paf 170: throw Exception("parser.runtime",
1.24.2.5 paf 171: method_name,
1.21 paf 172: "on this platform does not support '%.*s' salt prefix", prefix_size, normal_salt);
1.20 paf 173:
1.24.2.11 paf 174: r.write_pass_lang(String(pool.copy(static_sample_buf)));
1.20 paf 175: #else
1.19 paf 176: throw Exception("parser.runtime",
1.24.2.5 paf 177: method_name,
1.19 paf 178: "salt must start with '" PA_MD5PW_ID "'");
1.20 paf 179: #endif
180: }
1.19 paf 181: }
182:
1.1 parser 183: // constructor
184:
1.24.2.6 paf 185: MMath::MMath(): Methoded("math") {
1.1 parser 186: // ^FUNC(expr)
187: #define ADD1(name) \
188: add_native_method(#name, Method::CT_STATIC, _##name, 1, 1)
189:
190: ADD1(round); ADD1(floor); ADD1(ceiling);
1.3 parser 191: ADD1(trunc); ADD1(frac);
1.1 parser 192: ADD1(abs); ADD1(sign);
193: ADD1(exp); ADD1(log);
194: ADD1(sin); ADD1(asin);
195: ADD1(cos); ADD1(acos);
196: ADD1(tan); ADD1(atan);
1.3 parser 197: ADD1(degrees); ADD1(radians);
1.1 parser 198: ADD1(sqrt);
1.3 parser 199: ADD1(random);
1.1 parser 200:
201: #define ADD2(name) \
202: add_native_method(#name, Method::CT_STATIC, _##name, 2, 2)
203:
204: // ^pow(x;y)
205: ADD2(pow);
206:
1.19 paf 207: // ^crypt[password;salt]
208: ADD2(crypt);
1.5 parser 209: }
210:
211: // in MSVC each thread has it's own pseudo-random sequence
212: // in win32 apache each thread can handle multiple requests
213: // so to get proper randoms we remember random generated in one thread
214: void MMath::configure_admin(Request&) {
215: // setting seed
216: srand(
1.14 paf 217: randomizer
1.5 parser 218: #ifdef WIN32
1.14 paf 219: ^ GetCurrentThreadId()
1.5 parser 220: #else
1.14 paf 221: ^ getpid()
1.5 parser 222: #endif
1.20 paf 223: ^(unsigned int)time(NULL)
1.5 parser 224: );
225: if(!randomizer)
226: randomizer=rand();
1.1 parser 227: }
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