Annotation of parser3/src/classes/math.C, revision 1.24.2.12.2.9
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:
1.24.2.12.2.9! (paf 8:: static const char* IDENT_MATH_C="$Date: 2003/03/26 13:46:57 $";
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: }
1.24.2.12.2.9! (paf 55:: static void _random(Request& r, MethodParams& params) {
! 56:: Value& range=params.as_junction(0, "range must be expression");
1.24.2.12.2.6 (paf 57:: double top=r.process_to_value(range).as_double();
58:: if(top<=1)
1.16 paf 59: throw Exception("parser.runtime",
1.24.2.12.2.6 (paf 60:: 0,
1.20 paf 61: "top must be above 1(%g)", top);
1.1 parser 62:
1.24.2.12.2.6 (paf 63:: r.write_no_lang(*new VInt(_random(uint(top))));
1.1 parser 64: }
65:
66:
1.20 paf 67: typedef double(*math1_func_ptr)(double);
1.3 parser 68: static double frac(double param) { return param-trunc(param); }
69: static double degrees(double param) { return param /PI *180; }
70: static double radians(double param) { return param /180 *PI; }
1.1 parser 71:
1.24.2.12.2.9! (paf 72:: static void math1(Request& r, MethodParams& params, math1_func_ptr func) {
! 73:: Value& param=params.as_junction(0, "parameter must be expression");
1.1 parser 74:
1.24.2.12.2.6 (paf 75:: double result=func(r.process_to_value(param).as_double());
76:: r.write_no_lang(*new VDouble(result));
1.1 parser 77: }
78:
79: #define MATH1(name) \
1.24.2.12.2.9! (paf 80:: static void _##name(Request& r, MethodParams& params) {\
1.24.2.12.2.6 (paf 81:: math1(r, params, &name);\
1.1 parser 82: }
83: #define MATH1P(name_parser, name_c) \
1.24.2.12.2.9! (paf 84:: static void _##name_parser(Request& r, MethodParams& params) {\
1.24.2.12.2.6 (paf 85:: math1(r, params, &name_c);\
1.1 parser 86: }
87: MATH1(round); MATH1(floor); MATH1P(ceiling, ceil);
1.3 parser 88: MATH1(trunc); MATH1(frac);
1.1 parser 89: MATH1P(abs, fabs); MATH1(sign);
90: MATH1(exp); MATH1(log);
91: MATH1(sin); MATH1(asin);
92: MATH1(cos); MATH1(acos);
93: MATH1(tan); MATH1(atan);
1.3 parser 94: MATH1(degrees); MATH1(radians);
1.1 parser 95: MATH1(sqrt);
96:
97:
98: typedef double (*math2_func_ptr)(double, double);
1.24.2.12.2.9! (paf 99:: static void math2(Request& r, MethodParams& params, math2_func_ptr func) {
! 100:: Value& a=params.as_junction(0, "parameter must be expression");
! 101:: Value& b=params.as_junction(1, "parameter must be expression");
1.1 parser 102:
1.24.2.6 paf 103: double result=func(
1.24.2.12.2.6 (paf 104:: r.process_to_value(a).as_double(),
105:: r.process_to_value(b).as_double());
106:: r.write_no_lang(*new VDouble(result));
1.1 parser 107: }
108:
109: #define MATH2(name) \
1.24.2.12.2.9! (paf 110:: static void _##name(Request& r, MethodParams& params) {\
1.24.2.12.2.6 (paf 111:: math2(r, params, &name);\
1.1 parser 112: }
113: MATH2(pow);
114:
1.20 paf 115: inline bool is_salt_body_char(int c) {
116: return isalnum(c) || c == '.' || c=='/';
117: }
1.24.2.2 paf 118: static size_t calc_prefix_size(const char* salt) {
1.20 paf 119: if(size_t salt_size=strlen(salt)) {
120: if(!is_salt_body_char(salt[0])) { // $... {...
1.24.2.2 paf 121: const char* cur=salt+1; // skip
1.20 paf 122: while(is_salt_body_char(*cur++)) // ...$ ...}
123: ;
124: return cur-salt;
125: } else
126: return 0;
127: } else
128: return 0;
129: }
1.24.2.12.2.9! (paf 130:: static void _crypt(Request& r, MethodParams& params) {
! 131:: const char* password=params.as_string(0, "password must be string").cstr();
! 132:: const char* maybe_bodyless_salt=params.as_string(1, "salt must be string").cstr();
1.20 paf 133:
134: size_t prefix_size=calc_prefix_size(maybe_bodyless_salt);
1.24.2.2 paf 135: const char* normal_salt;
1.20 paf 136: char normalize_buf[MAX_STRING];
137: if(prefix_size==strlen(maybe_bodyless_salt)) { // bodyless?
138: strncpy(normalize_buf, maybe_bodyless_salt, MAX_STRING-MAX_SALT-1);
139: char *cur=normalize_buf+strlen(normalize_buf);
140: // sould add up MAX_SALT random chars
141: static unsigned char itoa64[] = /* 0 ... 63 => ASCII - 64 */
142: "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
143: for(int i=0; i<MAX_SALT; i++)
144: *cur++=itoa64[_random(64)];
145: *cur=0;
146: normal_salt=normalize_buf;
147: } else
148: normal_salt=maybe_bodyless_salt;
1.19 paf 149:
150: /* FreeBSD style MD5 string
151: */
1.20 paf 152: if(strncmp(normal_salt, PA_MD5PW_ID, PA_MD5PW_IDLEN) == 0) {
1.19 paf 153: const size_t sample_size=120;
1.24.2.12.2.7 (paf 154:: char *sample_buf=new(PointerFreeGC) char[sample_size];
1.24.2.12.2.6 (paf 155:: pa_MD5Encode((const unsigned char *)password,
1.20 paf 156: (const unsigned char *)normal_salt, sample_buf, sample_size);
1.24.2.6 paf 157: String sample(sample_buf);
158: r.write_pass_lang(sample);
1.20 paf 159: } else {
160: #ifdef HAVE_CRYPT
1.24.2.6 paf 161: const char* static_sample_buf=crypt(password, normal_salt);
162: if(!static_sample_buf // nothing generated
163: || !static_sample_buf[0] // generated nothing
164: || strncmp(static_sample_buf, normal_salt, prefix_size)!=0) // salt prefix not preserved
1.20 paf 165: throw Exception("parser.runtime",
1.24.2.12.2.8 (paf 166:: 0,
167:: "crypt on this platform does not support '%.*s' salt prefix", prefix_size, normal_salt);
1.20 paf 168:
1.24.2.12.2.8 (paf 169:: r.write_pass_lang(String(pa_strdup(static_sample_buf)));
1.20 paf 170: #else
1.19 paf 171: throw Exception("parser.runtime",
1.24.2.12.2.6 (paf 172:: 0,
1.19 paf 173: "salt must start with '" PA_MD5PW_ID "'");
1.20 paf 174: #endif
175: }
1.19 paf 176: }
177:
1.1 parser 178: // constructor
179:
1.24.2.6 paf 180: MMath::MMath(): Methoded("math") {
1.1 parser 181: // ^FUNC(expr)
182: #define ADD1(name) \
183: add_native_method(#name, Method::CT_STATIC, _##name, 1, 1)
184:
185: ADD1(round); ADD1(floor); ADD1(ceiling);
1.3 parser 186: ADD1(trunc); ADD1(frac);
1.1 parser 187: ADD1(abs); ADD1(sign);
188: ADD1(exp); ADD1(log);
189: ADD1(sin); ADD1(asin);
190: ADD1(cos); ADD1(acos);
191: ADD1(tan); ADD1(atan);
1.3 parser 192: ADD1(degrees); ADD1(radians);
1.1 parser 193: ADD1(sqrt);
1.3 parser 194: ADD1(random);
1.1 parser 195:
196: #define ADD2(name) \
197: add_native_method(#name, Method::CT_STATIC, _##name, 2, 2)
198:
199: // ^pow(x;y)
200: ADD2(pow);
201:
1.19 paf 202: // ^crypt[password;salt]
203: ADD2(crypt);
1.5 parser 204: }
205:
206: // in MSVC each thread has it's own pseudo-random sequence
207: // in win32 apache each thread can handle multiple requests
208: // so to get proper randoms we remember random generated in one thread
209: void MMath::configure_admin(Request&) {
210: // setting seed
211: srand(
1.14 paf 212: randomizer
1.5 parser 213: #ifdef WIN32
1.14 paf 214: ^ GetCurrentThreadId()
1.5 parser 215: #else
1.14 paf 216: ^ getpid()
1.5 parser 217: #endif
1.20 paf 218: ^(unsigned int)time(NULL)
1.5 parser 219: );
220: if(!randomizer)
221: randomizer=rand();
1.1 parser 222: }
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