Annotation of parser3/src/classes/math.C, revision 1.24.2.12.2.11
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:
1.24.2.12.2.1 (paf 8:): static const char* IDENT_MATH_C="$Date: 2003/04/03 13:00:34 $";
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: }
1.24.2.12.2.1 (paf 55:): #define MAX_UINT 0xFFFFFFFFu
1.24.2.12.2.9 (paf 56:: static void _random(Request& r, MethodParams& params) {
57:: Value& range=params.as_junction(0, "range must be expression");
1.24.2.12.2.6 (paf 58:: double top=r.process_to_value(range).as_double();
1.24.2.12.2.1 (paf 59:): if(top<=0 || top>MAX_UINT)
1.16 paf 60: throw Exception("parser.runtime",
1.24.2.12.2.6 (paf 61:: 0,
1.24.2.12.2.1 (paf 62:): "top(%g) must be [1..%u]", top, MAX_UINT);
1.1 parser 63:
1.24.2.12.2.6 (paf 64:: r.write_no_lang(*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:
1.24.2.12.2.9 (paf 73:: static void math1(Request& r, MethodParams& params, math1_func_ptr func) {
74:: Value& param=params.as_junction(0, "parameter must be expression");
1.1 parser 75:
1.24.2.12.2.6 (paf 76:: double result=func(r.process_to_value(param).as_double());
77:: r.write_no_lang(*new VDouble(result));
1.1 parser 78: }
79:
80: #define MATH1(name) \
1.24.2.12.2.9 (paf 81:: static void _##name(Request& r, MethodParams& params) {\
1.24.2.12.2.6 (paf 82:: math1(r, params, &name);\
1.1 parser 83: }
84: #define MATH1P(name_parser, name_c) \
1.24.2.12.2.9 (paf 85:: static void _##name_parser(Request& r, MethodParams& params) {\
1.24.2.12.2.6 (paf 86:: math1(r, params, &name_c);\
1.1 parser 87: }
88: MATH1(round); MATH1(floor); MATH1P(ceiling, ceil);
1.3 parser 89: MATH1(trunc); MATH1(frac);
1.1 parser 90: MATH1P(abs, fabs); MATH1(sign);
91: MATH1(exp); MATH1(log);
92: MATH1(sin); MATH1(asin);
93: MATH1(cos); MATH1(acos);
94: MATH1(tan); MATH1(atan);
1.3 parser 95: MATH1(degrees); MATH1(radians);
1.1 parser 96: MATH1(sqrt);
97:
98:
99: typedef double (*math2_func_ptr)(double, double);
1.24.2.12.2.9 (paf 100:: static void math2(Request& r, MethodParams& params, math2_func_ptr func) {
101:: Value& a=params.as_junction(0, "parameter must be expression");
102:: Value& b=params.as_junction(1, "parameter must be expression");
1.1 parser 103:
1.24.2.6 paf 104: double result=func(
1.24.2.12.2.6 (paf 105:: r.process_to_value(a).as_double(),
106:: r.process_to_value(b).as_double());
107:: r.write_no_lang(*new VDouble(result));
1.1 parser 108: }
109:
110: #define MATH2(name) \
1.24.2.12.2.9 (paf 111:: static void _##name(Request& r, MethodParams& params) {\
1.24.2.12.2.6 (paf 112:: math2(r, params, &name);\
1.1 parser 113: }
114: MATH2(pow);
115:
1.20 paf 116: inline bool is_salt_body_char(int c) {
117: return isalnum(c) || c == '.' || c=='/';
118: }
1.24.2.2 paf 119: static size_t calc_prefix_size(const char* salt) {
1.20 paf 120: if(size_t salt_size=strlen(salt)) {
121: if(!is_salt_body_char(salt[0])) { // $... {...
1.24.2.2 paf 122: const char* cur=salt+1; // skip
1.20 paf 123: while(is_salt_body_char(*cur++)) // ...$ ...}
124: ;
125: return cur-salt;
126: } else
127: return 0;
128: } else
129: return 0;
130: }
1.24.2.12.2.9 (paf 131:: static void _crypt(Request& r, MethodParams& params) {
132:: const char* password=params.as_string(0, "password must be string").cstr();
133:: const char* maybe_bodyless_salt=params.as_string(1, "salt must be string").cstr();
1.20 paf 134:
135: size_t prefix_size=calc_prefix_size(maybe_bodyless_salt);
1.24.2.2 paf 136: const char* normal_salt;
1.20 paf 137: char normalize_buf[MAX_STRING];
138: if(prefix_size==strlen(maybe_bodyless_salt)) { // bodyless?
139: strncpy(normalize_buf, maybe_bodyless_salt, MAX_STRING-MAX_SALT-1);
140: char *cur=normalize_buf+strlen(normalize_buf);
141: // sould add up MAX_SALT random chars
142: static unsigned char itoa64[] = /* 0 ... 63 => ASCII - 64 */
143: "./0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz";
144: for(int i=0; i<MAX_SALT; i++)
145: *cur++=itoa64[_random(64)];
146: *cur=0;
147: normal_salt=normalize_buf;
148: } else
149: normal_salt=maybe_bodyless_salt;
1.19 paf 150:
151: /* FreeBSD style MD5 string
152: */
1.20 paf 153: if(strncmp(normal_salt, PA_MD5PW_ID, PA_MD5PW_IDLEN) == 0) {
1.19 paf 154: const size_t sample_size=120;
1.24.2.12.2.7 (paf 155:: char *sample_buf=new(PointerFreeGC) char[sample_size];
1.24.2.12.2.6 (paf 156:: pa_MD5Encode((const unsigned char *)password,
1.20 paf 157: (const unsigned char *)normal_salt, sample_buf, sample_size);
1.24.2.6 paf 158: String sample(sample_buf);
159: r.write_pass_lang(sample);
1.20 paf 160: } else {
161: #ifdef HAVE_CRYPT
1.24.2.6 paf 162: const char* static_sample_buf=crypt(password, normal_salt);
163: if(!static_sample_buf // nothing generated
164: || !static_sample_buf[0] // generated nothing
165: || strncmp(static_sample_buf, normal_salt, prefix_size)!=0) // salt prefix not preserved
1.20 paf 166: throw Exception("parser.runtime",
1.24.2.12.2.8 (paf 167:: 0,
168:: "crypt on this platform does not support '%.*s' salt prefix", prefix_size, normal_salt);
1.20 paf 169:
1.24.2.12.2.8 (paf 170:: r.write_pass_lang(String(pa_strdup(static_sample_buf)));
1.20 paf 171: #else
1.19 paf 172: throw Exception("parser.runtime",
1.24.2.12.2.6 (paf 173:: 0,
1.19 paf 174: "salt must start with '" PA_MD5PW_ID "'");
1.20 paf 175: #endif
176: }
1.19 paf 177: }
178:
1.1 parser 179: // constructor
180:
1.24.2.6 paf 181: MMath::MMath(): Methoded("math") {
1.1 parser 182: // ^FUNC(expr)
183: #define ADD1(name) \
184: add_native_method(#name, Method::CT_STATIC, _##name, 1, 1)
185:
186: ADD1(round); ADD1(floor); ADD1(ceiling);
1.3 parser 187: ADD1(trunc); ADD1(frac);
1.1 parser 188: ADD1(abs); ADD1(sign);
189: ADD1(exp); ADD1(log);
190: ADD1(sin); ADD1(asin);
191: ADD1(cos); ADD1(acos);
192: ADD1(tan); ADD1(atan);
1.3 parser 193: ADD1(degrees); ADD1(radians);
1.1 parser 194: ADD1(sqrt);
1.3 parser 195: ADD1(random);
1.1 parser 196:
197: #define ADD2(name) \
198: add_native_method(#name, Method::CT_STATIC, _##name, 2, 2)
199:
200: // ^pow(x;y)
201: ADD2(pow);
202:
1.19 paf 203: // ^crypt[password;salt]
204: ADD2(crypt);
1.5 parser 205: }
206:
207: // in MSVC each thread has it's own pseudo-random sequence
208: // in win32 apache each thread can handle multiple requests
209: // so to get proper randoms we remember random generated in one thread
210: void MMath::configure_admin(Request&) {
211: // setting seed
212: srand(
1.14 paf 213: randomizer
1.5 parser 214: #ifdef WIN32
1.14 paf 215: ^ GetCurrentThreadId()
1.5 parser 216: #else
1.14 paf 217: ^ getpid()
1.5 parser 218: #endif
1.20 paf 219: ^(unsigned int)time(NULL)
1.5 parser 220: );
221: if(!randomizer)
222: randomizer=rand();
1.1 parser 223: }
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