X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/feeb8165970889f393d4a1bf2dae2a1505fd5e4c..6842d18650b487249b4ae29d0d7e17231b24cde8:/src/common/extended.c diff --git a/src/common/extended.c b/src/common/extended.c index c691e6b1a5..cf9f95fd2f 100644 --- a/src/common/extended.c +++ b/src/common/extended.c @@ -1,13 +1,11 @@ -#if !defined(__VISAGECPP__) -# pragma warning(disable:4001) /* non standard extension used: single line comment */ -#endif #include "wx/setup.h" + #include #if wxUSE_APPLE_IEEE /* - * C O N V E R T T O I E E E E X T E N D E D + * C O N V E R T T O I E E E E X T E N D E D */ /* Copyright (C) 1988-1991 Apple Computer, Inc. @@ -16,7 +14,7 @@ * Machine-independent I/O routines for IEEE floating-point numbers. * * NaN's and infinities are converted to HUGE_VAL or HUGE, which - * happens to be infinity on IEEE machines. Unfortunately, it is + * happens to be infinity on IEEE machines. Unfortunately, it is * impossible to preserve NaN's in a machine-independent way. * Infinities are, however, preserved on IEEE machines. * @@ -49,67 +47,68 @@ void ConvertToIeeeExtended(double num, unsigned char *bytes) { - int sign; - int expon; - double fMant, fsMant; - unsigned long hiMant, loMant; - - if (num < 0) { - sign = 0x8000; - num *= -1; - } else { - sign = 0; - } - - if (num == 0) { - expon = 0; hiMant = 0; loMant = 0; - } - else { - fMant = frexp(num, &expon); - if ((expon > 16384) || !(fMant < 1)) { /* Infinity or NaN */ - expon = sign|0x7FFF; hiMant = 0; loMant = 0; /* infinity */ - } - else { /* Finite */ - expon += 16382; - if (expon < 0) { /* denormalized */ - fMant = ldexp(fMant, expon); - expon = 0; - } - expon |= sign; - fMant = ldexp(fMant, 32); - fsMant = floor(fMant); - hiMant = FloatToUnsigned(fsMant); - fMant = ldexp(fMant - fsMant, 32); - fsMant = floor(fMant); - loMant = FloatToUnsigned(fsMant); - } - } - - /* disable the warning about 'possible loss of data' & 'conversion between diff types' */ - #ifdef _MSC_VER - #pragma warning(disable: 4244) - #pragma warning(disable: 4135) - #endif /* Visual C++ */ - - bytes[0] = (expon >> 8) & 0xff; - bytes[1] = expon & 0xff; - bytes[2] = (unsigned char) ((hiMant >> 24) & 0xff); - bytes[3] = (unsigned char) ((hiMant >> 16) & 0xff); - bytes[4] = (unsigned char) ((hiMant >> 8) & 0xff); - bytes[5] = (unsigned char) (hiMant & 0xff); - bytes[6] = (unsigned char) ((loMant >> 24) & 0xff); - bytes[7] = (unsigned char) ((loMant >> 16) & 0xff); - bytes[8] = (unsigned char) ((loMant >> 8) & 0xff); - bytes[9] = (unsigned char) (loMant & 0xff); - - #ifdef _MSC_VER - #pragma warning(default: 4244) - #pragma warning(default: 4135) - #endif /* Visual C++ */ + int sign; + int expon; + double fMant, fsMant; + unsigned long hiMant, loMant; + + if (num < 0) { + sign = 0x8000; + num *= -1; + } else { + sign = 0; + } + + if (num == 0) { + expon = 0; hiMant = 0; loMant = 0; + } + else { + fMant = frexp(num, &expon); + if ((expon > 16384) || !(fMant < 1)) { /* Infinity or NaN */ + expon = sign|0x7FFF; hiMant = 0; loMant = 0; /* infinity */ + } + else { /* Finite */ + expon += 16382; + if (expon < 0) { /* denormalized */ + fMant = ldexp(fMant, expon); + expon = 0; + } + expon |= sign; + fMant = ldexp(fMant, 32); + fsMant = floor(fMant); + hiMant = FloatToUnsigned(fsMant); + fMant = ldexp(fMant - fsMant, 32); + fsMant = floor(fMant); + loMant = FloatToUnsigned(fsMant); + } + } + + /* disable the warning about 'possible loss of data' & 'conversion between + * diff types' */ +#ifdef _MSC_VER +#pragma warning(disable: 4244) +#pragma warning(disable: 4135) +#endif /* Visual C++ */ + + bytes[0] = (expon >> 8) & 0xff; + bytes[1] = expon & 0xff; + bytes[2] = (unsigned char) ((hiMant >> 24) & 0xff); + bytes[3] = (unsigned char) ((hiMant >> 16) & 0xff); + bytes[4] = (unsigned char) ((hiMant >> 8) & 0xff); + bytes[5] = (unsigned char) (hiMant & 0xff); + bytes[6] = (unsigned char) ((loMant >> 24) & 0xff); + bytes[7] = (unsigned char) ((loMant >> 16) & 0xff); + bytes[8] = (unsigned char) ((loMant >> 8) & 0xff); + bytes[9] = (unsigned char) (loMant & 0xff); + +#ifdef _MSC_VER +#pragma warning(default: 4244) +#pragma warning(default: 4135) +#endif /* Visual C++ */ } /* - * C O N V E R T F R O M I E E E E X T E N D E D + * C O N V E R T F R O M I E E E E X T E N D E D */ /* @@ -119,16 +118,16 @@ void ConvertToIeeeExtended(double num, unsigned char *bytes) * Machine-independent I/O routines for IEEE floating-point numbers. * * NaN's and infinities are converted to HUGE_VAL or HUGE, which - * happens to be infinity on IEEE machines. Unfortunately, it is + * happens to be infinity on IEEE machines. Unfortunately, it is * impossible to preserve NaN's in a machine-independent way. * Infinities are, however, preserved on IEEE machines. * * These routines have been tested on the following machines: - * Apple Macintosh, MPW 3.1 C compiler - * Apple Macintosh, THINK C compiler - * Silicon Graphics IRIS, MIPS compiler - * Cray X/MP and Y/MP - * Digital Equipment VAX + * Apple Macintosh, MPW 3.1 C compiler + * Apple Macintosh, THINK C compiler + * Silicon Graphics IRIS, MIPS compiler + * Cray X/MP and Y/MP + * Digital Equipment VAX * * * Implemented by Malcolm Slaney and Ken Turkowski. @@ -156,38 +155,38 @@ void ConvertToIeeeExtended(double num, unsigned char *bytes) double ConvertFromIeeeExtended(const unsigned char *bytes) { - double f; - int expon; - unsigned long hiMant, loMant; - - expon = ((bytes[0] & 0x7F) << 8) | (bytes[1] & 0xFF); - hiMant = ((unsigned long)(bytes[2] & 0xFF) << 24) - | ((unsigned long) (bytes[3] & 0xFF) << 16) - | ((unsigned long) (bytes[4] & 0xFF) << 8) - | ((unsigned long) (bytes[5] & 0xFF)); - loMant = ((unsigned long) (bytes[6] & 0xFF) << 24) - | ((unsigned long) (bytes[7] & 0xFF) << 16) - | ((unsigned long) (bytes[8] & 0xFF) << 8) - | ((unsigned long) (bytes[9] & 0xFF)); - - if (expon == 0 && hiMant == 0 && loMant == 0) { - f = 0; - } - else { - if (expon == 0x7FFF) { /* Infinity or NaN */ - f = HUGE_VAL; - } - else { - expon -= 16383; - f = ldexp(UnsignedToFloat(hiMant), expon-=31); - f += ldexp(UnsignedToFloat(loMant), expon-=32); - } - } - - if (bytes[0] & 0x80) - return -f; - else - return f; + double f; + int expon; + unsigned long hiMant, loMant; + + expon = ((bytes[0] & 0x7F) << 8) | (bytes[1] & 0xFF); + hiMant = ((unsigned long)(bytes[2] & 0xFF) << 24) + | ((unsigned long) (bytes[3] & 0xFF) << 16) + | ((unsigned long) (bytes[4] & 0xFF) << 8) + | ((unsigned long) (bytes[5] & 0xFF)); + loMant = ((unsigned long) (bytes[6] & 0xFF) << 24) + | ((unsigned long) (bytes[7] & 0xFF) << 16) + | ((unsigned long) (bytes[8] & 0xFF) << 8) + | ((unsigned long) (bytes[9] & 0xFF)); + + if (expon == 0 && hiMant == 0 && loMant == 0) { + f = 0; + } + else { + if (expon == 0x7FFF) { /* Infinity or NaN */ + f = HUGE_VAL; + } + else { + expon -= 16383; + f = ldexp(UnsignedToFloat(hiMant), expon-=31); + f += ldexp(UnsignedToFloat(loMant), expon-=32); + } + } + + if (bytes[0] & 0x80) + return -f; + else + return f; } #endif /* wxUSE_APPLE_IEEE */