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Diffstat (limited to 'sal/inc/rtl/math.h')
| -rw-r--r-- | sal/inc/rtl/math.h | 397 |
1 files changed, 397 insertions, 0 deletions
diff --git a/sal/inc/rtl/math.h b/sal/inc/rtl/math.h new file mode 100644 index 000000000000..12f528a36e6d --- /dev/null +++ b/sal/inc/rtl/math.h @@ -0,0 +1,397 @@ +/************************************************************************* + * + * $RCSfile: math.h,v $ + * + * $Revision: 1.1 $ + * + * last change: $Author: sb $ $Date: 2002-11-04 15:21:35 $ + * + * The Contents of this file are made available subject to the terms of + * either of the following licenses + * + * - GNU Lesser General Public License Version 2.1 + * - Sun Industry Standards Source License Version 1.1 + * + * Sun Microsystems Inc., October, 2000 + * + * GNU Lesser General Public License Version 2.1 + * ============================================= + * Copyright 2000 by Sun Microsystems, Inc. + * 901 San Antonio Road, Palo Alto, CA 94303, USA + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software Foundation. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + * + * Sun Industry Standards Source License Version 1.1 + * ================================================= + * The contents of this file are subject to the Sun Industry Standards + * Source License Version 1.1 (the "License"); You may not use this file + * except in compliance with the License. You may obtain a copy of the + * License at http://www.openoffice.org/license.html. + * + * Software provided under this License is provided on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, + * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS, + * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING. + * See the License for the specific provisions governing your rights and + * obligations concerning the Software. + * + * The Initial Developer of the Original Code is: Sun Microsystems, Inc. + * + * Copyright: 2002 by Sun Microsystems, Inc. + * + * All Rights Reserved. + * + * Contributor(s): _______________________________________ + * + * + ************************************************************************/ + +#if !defined INCLUDED_RTL_MATH_H +#define INCLUDED_RTL_MATH_H + +#include "rtl/ustring.h" +#include "sal/types.h" + +#if defined __cplusplus +extern "C" { +#endif /* __cplusplus */ + +/** Formatting modes for rtl_math_doubleToString and rtl_math_doubleToUString. + */ +enum rtl_math_StringFormat +{ + /** Like sprintf() %E. + */ + rtl_math_StringFormat_E, + + /** Like sprintf() %f. + */ + rtl_math_StringFormat_F, + + /** Like sprintf() %G, 'F' or 'E' format is used depending on which one is + more compact. + */ + rtl_math_StringFormat_G, + + /** Automatic, 'F' or 'E' format is used depending on the numeric value to + be formatted. + */ + rtl_math_StringFormat_Automatic, + + /** @internal + */ + rtl_math_StringFormat_FORCE_EQUAL_SIZE = SAL_MAX_ENUM +}; + +/** Status for rtl_math_stringToDouble and rtl_math_uStringToDouble. + */ +enum rtl_math_ConversionStatus +{ + /** Conversion was successful. + */ + rtl_math_ConversionStatus_Ok, + + /** Conversion caused overflow or underflow. + */ + rtl_math_ConversionStatus_OutOfRange, + + /** @internal + */ + rtl_math_ConversionStatus_FORCE_EQUAL_SIZE = SAL_MAX_ENUM +}; + +/** Rounding modes for rtl_math_round. + */ +enum rtl_math_RoundingMode +{ + /** Like HalfUp, but corrects roundoff errors, preferred. + */ + rtl_math_RoundingMode_Corrected, + + /** Floor of absolute value, signed return (commercial). + */ + rtl_math_RoundingMode_Down, + + /** Ceil of absolute value, signed return (commercial). + */ + rtl_math_RoundingMode_Up, + + /** Floor of signed value. + */ + rtl_math_RoundingMode_Floor, + + /** Ceil of signed value. + */ + rtl_math_RoundingMode_Ceiling, + + /** Frac <= 0.5 ? floor of abs : ceil of abs, signed return. + */ + rtl_math_RoundingMode_HalfDown, + + /** Frac < 0.5 ? floor of abs : ceil of abs, signed return (mathematical). + */ + rtl_math_RoundingMode_HalfUp, + + /** IEEE rounding mode (statistical). + */ + rtl_math_RoundingMode_HalfEven, + + /** @internal + */ + rtl_math_RoundingMode_FORCE_EQUAL_SIZE = SAL_MAX_ENUM +}; + +/** Conversions analogous to sprintf() using internal rounding. + + +/-HUGE_VAL are converted to "1.#INF" and "-1.#INF", NAN values are + converted to "1.#NAN" and "-1.#NAN", of course using cDecSeparator instead + of '.'. + + @param pResult + Returns the resulting byte string. Must itself not be null, and must point + to either null or a valid string. + + @param pResultCapacity + If null, pResult is considered to point to immutable strings, and a new + string will be allocated in pResult. + If non-null, it points to the current capacity of pResult, which is + considered to point to a string buffer (pResult must not itself be null in + this case, and must point to a string that has room for the given capacity). + The string representation of the given double value is appended to pResult. + If pResult's current capacity is too small, a new string buffer will be + allocated in pResult as necessary, and pResultCapacity will contain the new + capacity on return. + + @param nResultOffset + If pResult is used as a string buffer (i.e., pResultCapacity is non-null), + nResultOffset specifies the insertion offset within the buffer. Ignored + otherwise. + + @param fValue + The value to convert. + + @param eFormat + The format to use. If eFormat == rtl_math_StringFormat_G and + nDecPlaces < 0, the default number (currently 6) of decimals is generated. + If eFormat == rtl_math_StringFormat_Automatic and nDecPlaces < 0, the + highest number of significant decimals possible is generated. + + @param nDecPlaces + The number of decimals to be generated. Must be non-negative, expect as + described for the eFormat parameter. + + @param cDecSeparator + The decimal separator. + + @param pGroups + Either null (no grouping is used), or a null-terminated list of group + lengths. Each group length must be strictly positive. If the number of + digits in a conversion exceeds the specified range, the last (highest) group + length is repeated as needed. + + @param cGroupSeparator + The group separator. Ignored if pGroups is null. + + @param bEraseTrailingDecZeros + Trailing zeros in decimal places are erased. + */ +void SAL_CALL rtl_math_doubleToString(rtl_String ** pResult, + sal_Int32 * pResultCapacity, + sal_Int32 nResultOffset, double fValue, + enum rtl_math_StringFormat eFormat, + sal_Int32 nDecPlaces, + sal_Char cDecSeparator, + sal_Int32 const * pGroups, + sal_Char cGroupSeparator, + sal_Bool bEraseTrailingDecZeros) + SAL_THROW_EXTERN_C(); + +/** Conversions analogous to sprintf() using internal rounding. + + +/-HUGE_VAL are converted to "1.#INF" and "-1.#INF", NAN values are + converted to "1.#NAN" and "-1.#NAN", of course using cDecSeparator instead + of '.'. + + @param pResult + Returns the resulting Unicode string. Must itself not be null, and must + point to either null or a valid string. + + @param pResultCapacity + If null, pResult is considered to point to immutable strings, and a new + string will be allocated in pResult. + If non-null, it points to the current capacity of pResult, which is + considered to point to a string buffer (pResult must not itself be null in + this case, and must point to a string that has room for the given capacity). + The string representation of the given double value is appended to pResult. + If pResult's current capacity is too small, a new string buffer will be + allocated in pResult as necessary, and pResultCapacity will contain the new + capacity on return. + + @param nResultOffset + If pResult is used as a string buffer (i.e., pResultCapacity is non-null), + nResultOffset specifies the insertion offset within the buffer. Ignored + otherwise. + + @param fValue + The value to convert. + + @param eFormat + The format to use. If eFormat == rtl_math_StringFormat_G and + nDecPlaces < 0, the default number (currently 6) of decimals is generated. + If eFormat == rtl_math_StringFormat_Automatic and nDecPlaces < 0, the + highest number of significant decimals possible is generated. + + @param nDecPlaces + The number of decimals to be generated. Must be non-negative, expect as + described for the eFormat parameter. + + @param cDecSeparator + The decimal separator. + + @param pGroups + Either null (no grouping is used), or a null-terminated list of group + lengths. Each group length must be strictly positive. If the number of + digits in a conversion exceeds the specified range, the last (highest) group + length is repeated as needed. + + @param cGroupSeparator + The group separator. Ignored if pGroups is null. + + @param bEraseTrailingDecZeros + Trailing zeros in decimal places are erased. + */ +void SAL_CALL rtl_math_doubleToUString(rtl_uString ** pResult, + sal_Int32 * pResultCapacity, + sal_Int32 nResultOffset, double fValue, + enum rtl_math_StringFormat eFormat, + sal_Int32 nDecPlaces, + sal_Unicode cDecSeparator, + sal_Int32 const * pGroups, + sal_Unicode cGroupSeparator, + sal_Bool bEraseTrailingDecZeros) + SAL_THROW_EXTERN_C(); + +/** Conversion analogous to strtod(), convert a string representing a + decimal number into a double value. + + Leading tabs (0x09) and spaces (0x20) are eaten. Overflow returns + +/-HUGE_VAL, underflow 0. In both cases pStatus is set to + rtl_math_ConversionStatus_OutOfRange, otherwise to + rtl_math_ConversionStatus_Ok. "+/-1.#INF" is recognized as +/-HUGE_VAL, + pStatus is set to rtl_math_ConversionStatus_OutOfRange. "+/-1.#NAN" is + recognized and the value is set to +/-NAN, pStatus is set to + rtl_math_ConversionStatus_Ok. + + @param pBegin + Points to the start of the byte string to convert. Must not be null. + + @param pEnd + Points one past the end of the byte string to convert. The condition + pEnd >= pBegin must hold. + + @param cDecSeparator + The decimal separator. + + @param cGroupSeparator + The group (aka thousands) separator. + + @param pStatus + If non-null, returns the status of the conversion. + + @param pParsedEnd + If non-null, returns one past the position of the last character parsed + away. Thus if [pBegin..pEnd) only contains the numerical string to be + parsed, *pParsedEnd == pEnd on return. + */ +double SAL_CALL rtl_math_stringToDouble( + sal_Char const * pBegin, sal_Char const * pEnd, sal_Char cDecSeparator, + sal_Char cGroupSeparator, enum rtl_math_ConversionStatus * pStatus, + sal_Char const ** pParsedEnd) SAL_THROW_EXTERN_C(); + +/** Conversion analogous to strtod(), convert a string representing a + decimal number into a double value. + + Leading tabs (U+0009) and spaces (U+0020) are eaten. Overflow returns + +/-HUGE_VAL, underflow 0. In both cases pStatus is set to + rtl_math_ConversionStatus_OutOfRange, otherwise to + rtl_math_ConversionStatus_Ok. "+/-1.#INF" is recognized as +/-HUGE_VAL, + pStatus is set to rtl_math_ConversionStatus_OutOfRange. "+/-1.#NAN" is + recognized and the value is set to +/-NAN, pStatus is set to + rtl_math_ConversionStatus_Ok. + + @param pBegin + Points to the start of the Unicode string to convert. Must not be null. + + @param pEnd + Points one past the end of the Unicode string to convert. The condition + pEnd >= pBegin must hold. + + @param cDecSeparator + The decimal separator. + + @param cGroupSeparator + The group (aka thousands) separator. + + @param pStatus + If non-null, returns the status of the conversion. + + @param pParsedEnd + If non-null, returns one past the position of the last character parsed + away. Thus if [pBegin..pEnd) only contains the numerical string to be + parsed, *pParsedEnd == pEnd on return. + */ +double SAL_CALL rtl_math_uStringToDouble( + sal_Unicode const * pBegin, sal_Unicode const * pEnd, + sal_Unicode cDecSeparator, sal_Unicode cGroupSeparator, + enum rtl_math_ConversionStatus * pStatus, sal_Unicode const ** pParsedEnd) + SAL_THROW_EXTERN_C(); + +/** Rounds a double value. + + @param fValue + Specifies the value to be rounded. + + @param nDecPlaces + Specifies the decimal place where rounding occurs. Must be in the range + -20 to +20, inclusive. Negative if rounding occurs before the decimal + point. + + @param eMode + Specifies the rounding mode. + */ +double SAL_CALL rtl_math_round(double fValue, int nDecPlaces, + enum rtl_math_RoundingMode eMode) + SAL_THROW_EXTERN_C(); + +/** Scales fVal to a power of 10 without calling pow() or div() for nExp values + between -16 and +16, providing a faster method. + + @param fValue + The value to be raised. + + @param nExp + The exponent. + + @return + fVal * pow(10.0, nExp) + */ +double SAL_CALL rtl_math_pow10Exp(double fValue, int nExp) SAL_THROW_EXTERN_C(); + +#if defined __cplusplus +} +#endif /* __cplusplus */ + +#endif /* INCLUDED_RTL_MATH_H */ |