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1 | // Copyright (c) 1998-1999 Matra Datavision |
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2 | // Copyright (c) 1999-2014 OPEN CASCADE SAS |
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3 | // |
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4 | // This file is part of Open CASCADE Technology software library. |
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5 | // |
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6 | // This library is free software; you can redistribute it and/or modify it under |
7 | // the terms of the GNU Lesser General Public License version 2.1 as published |
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8 | // by the Free Software Foundation, with special exception defined in the file |
9 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
10 | // distribution for complete text of the license and disclaimer of any warranty. |
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11 | // |
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12 | // Alternatively, this file may be used under the terms of Open CASCADE |
13 | // commercial license or contractual agreement. |
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14 | |
15 | #include <OSD.ixx> |
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16 | #include <Standard_Stream.hxx> |
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17 | #include <stdio.h> |
18 | #include <math.h> |
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19 | #if defined(isfinite) |
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20 | # define finite isfinite |
21 | #endif |
22 | |
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23 | // Convert Real to CString in format e with 16 significant digits. |
24 | // The decimal point character is always a period. |
25 | // The conversion is independant from current locale database |
26 | |
27 | Standard_Boolean OSD::RealToCString(const Standard_Real aReal, |
28 | Standard_PCharacter& aString) |
29 | { |
30 | char *p, *q ; |
31 | |
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32 | if (Sprintf(aString,"%.17e",aReal) <= 0) //BUC60808 |
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33 | return Standard_False ; |
34 | |
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35 | // Suppress "e+00" and unsignificant 0's |
36 | |
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37 | p = strchr(aString,'e'); |
38 | if (p) { |
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39 | if (!strcmp(p,"e+00")) |
40 | *p = 0 ; |
41 | for (q = p-1 ; *q == '0' ; q--) ; |
42 | if (q != p-1) { |
43 | if (*q != '.') q++ ; |
44 | while (*p) |
45 | *q++ = *p++ ; |
46 | *q = 0 ; |
47 | } |
48 | } |
49 | return Standard_True ; |
50 | } |
51 | |
52 | // Make the RealToCString reciprocal conversion. |
53 | |
54 | Standard_Boolean OSD::CStringToReal(const Standard_CString aString, |
55 | Standard_Real& aReal) |
56 | { |
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57 | char *endptr ; |
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58 | aReal = Strtod(aString, &endptr); |
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59 | if (*endptr) |
60 | return Standard_False ; |
61 | return Standard_True; |
62 | } |
63 | |
64 | //======================================================================= |
65 | //function : OSDSecSleep |
66 | //purpose : Cause the process to sleep during a amount of seconds |
67 | //======================================================================= |
68 | |
69 | #ifdef WNT |
70 | # include <Windows.h> |
71 | #if !defined(__CYGWIN32__) && !defined(__MINGW32__) |
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72 | //# include <Mapiwin.h> |
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73 | #endif |
74 | # define _DEXPLEN 11 |
75 | # define _IEEE 1 |
76 | # define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE) |
77 | # define finite _finite |
78 | # define SLEEP(NSEC) Sleep(1000*(NSEC)) |
79 | #else |
80 | # define SLEEP(NSEC) sleep(NSEC) |
81 | #endif |
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82 | #ifndef _WIN32 |
83 | #include <unistd.h> |
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84 | #endif |
85 | |
86 | void OSD::SecSleep(const Standard_Integer aDelay) |
87 | { |
88 | SLEEP(aDelay); |
89 | } |
90 | |
91 | //======================================================================= |
92 | //function : MilliSecSleep |
93 | //purpose : Cause the process to sleep during a amount of milliseconds |
94 | //======================================================================= |
95 | |
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96 | #ifdef _WIN32 |
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97 | |
98 | void OSD::MilliSecSleep(const Standard_Integer aDelay) |
99 | { |
100 | Sleep(aDelay) ; |
101 | } |
102 | |
103 | #else |
104 | |
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105 | #include <sys/time.h> |
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106 | |
107 | void OSD::MilliSecSleep(const Standard_Integer aDelay) |
108 | { |
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109 | struct timeval timeout ; |
110 | |
111 | timeout.tv_sec = aDelay / 1000 ; |
112 | timeout.tv_usec = (aDelay % 1000) * 1000 ; |
113 | |
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114 | select(0,NULL,NULL,NULL,&timeout) ; |
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115 | } |
116 | |
117 | #endif |
118 | |
119 | //======================================================================= |
120 | //function : IsDivisible |
121 | //purpose : |
122 | //======================================================================= |
123 | |
124 | Standard_Boolean OSD::IsDivisible(const Standard_Real theDividend,const Standard_Real theDivisor) |
125 | { |
126 | if ( theDivisor == 0. || ! finite(theDividend) ) return Standard_False; |
127 | // |
128 | // you may divide by infinity |
129 | // |
130 | if (! finite(theDivisor)) return Standard_True; |
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131 | #ifdef OCCT_DEBUG |
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132 | // Standard_Integer aExp1, aExp2; |
133 | // Standard_Real aMant1 = frexp(theDividend, &aExp1); |
134 | // Standard_Real aMant2 = frexp(theDivisor, &aExp2); |
135 | #endif |
136 | // Code de :KL:dev:ref : |
137 | // return ((aExp1-aExp2 < DMAXEXP) || // exponent of the result |
138 | // (aExp1-aExp2 == DMAXEXP && aMant1 < aMant2)) ; |
139 | |
140 | // Code de :KAS:C30 : |
141 | return Standard_True; |
142 | |
143 | |
144 | // this is unacceptable return for Linux because of (temporary?) undefined aExp1 and aExp2. |
145 | // Testing both over and underflow should be (:KL:dev ) : |
146 | |
147 | // return ((aExp1-aExp2 < DMAXEXP) && (aExp1-aExp2 > DMINEXP) || |
148 | // (aExp1-aExp2 == DMAXEXP && aMant1 < aMant2) || |
149 | // (aExp1-aExp2 == DMINEXP && aMant1 > aMant2)) ; |
150 | } |
151 | |
152 | //======================================================================= |
153 | //function : GetExponent |
154 | //purpose : |
155 | //======================================================================= |
156 | |
157 | //Standard_Integer OSD::GetExponent(const Standard_Real aReal) |
158 | Standard_Integer OSD::GetExponent(const Standard_Real ) |
159 | { |
160 | // Code de :KAS:C30 : |
161 | |
162 | cout << "Function OSD::GetExponent() not yet implemented." << endl; |
163 | return 0 ; |
164 | |
165 | // Code de :KL:dev:ref : |
166 | |
167 | // Standard_Integer Exp ; |
168 | |
169 | //// Standard_Real Mant = frexp(aReal, &Exp) ; |
170 | // frexp(aReal, &Exp) ; |
171 | // return Exp ; |
172 | } |
173 | |
174 | //======================================================================= |
175 | //function : GetMantissa |
176 | //purpose : |
177 | //======================================================================= |
178 | |
179 | //Standard_Real OSD::GetMantissa(const Standard_Real aReal) |
180 | Standard_Real OSD::GetMantissa(const Standard_Real ) |
181 | { |
182 | // Code de :KAS:C30 : |
183 | cout << "Function OSD::GetMantissa() not yet implemented." << endl; |
184 | return 0 ; |
185 | |
186 | // Code de :KL:dev:ref : |
187 | |
188 | // Standard_Integer Exp ; |
189 | // return frexp(aReal, &Exp) ; |
190 | } |
191 | |
192 | //======================================================================= |
193 | // Code de :KAS:C30 : |
194 | //======================================================================= |
195 | Standard_Integer OSD::AvailableMemory() |
196 | { |
197 | cout << "Function OSD::AvailableMemory() not yet implemented." << endl; |
198 | return 0 ; |
199 | } |
200 | |
201 | // Code de :KL:dev:ref ??????????????? : |
202 | #if 0 |
203 | //======================================================================= |
204 | //function : AvailableMemory |
205 | //purpose : |
206 | //======================================================================= |
207 | #include <stdlib.h> |
208 | #include <stdio.h> |
209 | #include <malloc.h> |
210 | |
211 | # if defined(SUN) || defined(__sun) || defined(SOLARIS) |
212 | # define SIZE_MAX 0x7fffffff |
213 | # elif defined(__osf__) || defined(DECOSF1) |
214 | # define SIZE_MAX 0x10000000000 |
215 | # elif defined(WNT) |
216 | # define SIZE_MAX 0x7ffdefff |
217 | # else |
218 | # define SIZE_MAX 0xffffffff |
219 | # endif |
220 | |
221 | Standard_Integer OSD::AvailableMemory() |
222 | { |
223 | size_t min = 1024 ; |
224 | size_t max = SIZE_MAX ; |
225 | size_t middle = SIZE_MAX ; |
226 | void * addr ; |
227 | int nballoc = 0 ; |
228 | int nbfree = 0 ; |
229 | |
230 | while (min + 1024 < max) { |
231 | if ((addr = malloc (middle))== (void *)-1) { |
232 | perror("OSD::AvailableMemory()_malloc error :") ; |
233 | return 0 ; |
234 | } |
235 | nballoc++ ; |
236 | if (addr == 0) |
237 | max = middle ; |
238 | else { |
239 | free(addr) ; |
240 | nbfree++ ; |
241 | min = middle ; |
242 | } |
243 | middle = min + ((max - min ) >> 6) * 63 ; |
244 | } |
245 | return min >> 10 ; |
246 | } |
247 | |
248 | #endif |