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00019 #ifndef __QINT_H__
00020 #define __QINT_H__
00021
00022 #if defined (CS_IEEE_DOUBLE_FORMAT)
00023
00106 #ifdef CS_BIG_ENDIAN
00107 # define CS_LOWER_WORD_BYTE 4
00108 #else
00109 # define CS_LOWER_WORD_BYTE 0
00110 #endif
00111
00112 #define CS_LONG_AT_BYTE(x,b) *(long *)(((char *)&x) + b)
00113
00120 #define FIST_MAGIC_QINT (65536.0 * 65536.0 * 16.0)
00121
00123
00128 #ifdef CS_QINT_WORKAROUND
00129 static inline long QInt (double inval)
00130 {
00131 union { double dtemp; long result; } x;
00132
00133 x.dtemp = FIST_MAGIC_QINT + inval;
00134 x.result = CS_LONG_AT_BYTE (x.dtemp, 2);
00135 return x.result < 0 ? (x.result >> 1) + 1 : x.result;
00136 }
00137 #else
00138 static inline long QInt (double inval)
00139 {
00140 double dtemp = FIST_MAGIC_QINT + inval;
00141
00142
00143 long result = CS_LONG_AT_BYTE (dtemp, 2);
00144 return result < 0 ? (result >> 1) + 1 : result;
00145 }
00146 #endif
00147
00152 #define FIST_MAGIC_QROUND (((65536.0 * 65536.0 * 16.0) + (65536.0 * 0.5)) * 65536.0)
00153
00155 static inline long QRound (double inval)
00156 {
00157 double dtemp = FIST_MAGIC_QROUND + inval;
00158 return CS_LONG_AT_BYTE (dtemp, CS_LOWER_WORD_BYTE) - 0x80000000;
00159 }
00160
00165 #define FIST_MAGIC_QINT8 (((65536.0 * 16.0) + 0.5) * 65536.0 * 256.0)
00166
00168 inline long QInt8 (float inval)
00169 {
00170 double dtemp = FIST_MAGIC_QINT8 + inval;
00171 return CS_LONG_AT_BYTE (dtemp, CS_LOWER_WORD_BYTE) - 0x80000000;
00172 }
00173
00178 #define FIST_MAGIC_QINT16 (((65536.0 * 16.0) + 0.5) * 65536.0)
00179
00181 inline long QInt16 (float inval)
00182 {
00183 double dtemp = FIST_MAGIC_QINT16 + inval;
00184 return CS_LONG_AT_BYTE (dtemp, CS_LOWER_WORD_BYTE) - 0x80000000;
00185 }
00186
00191 #define FIST_MAGIC_QINT24 (((65536.0 * 16.0) + 0.5) * 256.0)
00192
00193 inline long QInt24 (float inval)
00194 {
00195 double dtemp = FIST_MAGIC_QINT24 + inval;
00196 return CS_LONG_AT_BYTE (dtemp, CS_LOWER_WORD_BYTE) - 0x80000000;
00197 }
00198
00199 #else
00200
00201 #define QRound(x) (int ((x) + ((x < 0) ? -0.5 : +0.5)))
00202 #define QInt(x) (int (x))
00203 #define QInt8(x) (int ((x)*256.))
00204 #define QInt16(x) (int ((x)*65536.))
00205 #define QInt24(x) (int ((x)*16777216.))
00206
00207 #endif
00208
00209 #endif // __QINT_H__