util.h Source File

00001 /*
00002     Copyright (C) 1998 by Jorrit Tyberghein
00003 
00004     This library is free software; you can redistribute it and/or
00005     modify it under the terms of the GNU Library General Public
00006     License as published by the Free Software Foundation; either
00007     version 2 of the License, or (at your option) any later version.
00008 
00009     This library is distributed in the hope that it will be useful,
00010     but WITHOUT ANY WARRANTY; without even the implied warranty of
00011     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012     Library General Public License for more details.
00013 
00014     You should have received a copy of the GNU Library General Public
00015     License along with this library; if not, write to the Free
00016     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
00017 */
00018 
00019 #ifndef __UTIL_H__
00020 #define __UTIL_H__
00021 
00022 #include <stdio.h>
00023 
00025 long csRndNum (long minRange, long maxRange);
00026 
00033 extern char *csStrNew (const char *s);
00034 
00040 extern void csCombinations (int m, int n,
00041   bool (*callback) (int *vector, int count,
00042   void *arg), void *arg);
00043 
00053 extern char *csExpandName (const char *iName);
00054 
00059 extern void csSplitPath (const char *iPathName, char *oPath, size_t iPathSize,
00060   char *oName, size_t iNameSize);
00061 
00070 extern bool csGlobMatches (const char *fName, const char *fMask);
00071 
00073 static inline void csSwapInt (int &a, int &b)
00074 {
00075   int tmp = a;
00076   a = b; b = tmp;
00077 }
00078 
00080 static inline void csSwapFloat (float &a, float &b)
00081 {
00082   float tmp = a;
00083   a = b; b = tmp;
00084 }
00085 
00087 static inline float csSquareFloat (float x)
00088 {
00089   return x*x;
00090 }
00091 
00093 static inline unsigned long csByteSwap32bit( const unsigned long value )
00094 {
00095   return ((value >> 24 ) & 0x000000FF ) | ((value >> 8) & 0x0000FF00)
00096         | ((value << 8) & 0x00FF0000) | (( value << 24) & 0xFF000000);
00097 }
00098 
00100 static inline unsigned short csByteSwap16bit( const unsigned short value )
00101 {
00102   return (( value >> 8 ) & 0x000000FF ) | (( value << 8 ) & 0x0000FF00 );
00103 }
00104 
00106 void csByteSwap32bitBuffer( register unsigned long* const place,
00107         register unsigned long count );
00108 
00110 void csByteSwap16bitBuffer( register unsigned short* const place,
00111         register unsigned long count );
00112 
00117 int csFindNearestPowerOf2 (int n);
00118 
00120 bool csIsPowerOf2 (int n);
00121 
00123 static inline int csLog2 (int n)
00124 {
00125   int l = 31; unsigned x = 0x80000000;
00126   while (x && !(n & x))
00127     l--, x >>= 1;
00128   return l;
00129 }
00130 
00136 void csFindReplace (char *dest, const char *src, const char *search,
00137   const char *replace, int max);
00138 
00139 #endif // __UTIL_H__