| // Copyright (C) 2006-2010 David Sugar, Tycho Softworks. |
| // |
| // This file is part of GNU uCommon C++. |
| // |
| // GNU uCommon C++ is free software: you can redistribute it and/or modify |
| // it under the terms of the GNU Lesser General Public License as published |
| // by the Free Software Foundation, either version 3 of the License, or |
| // (at your option) any later version. |
| // |
| // GNU uCommon C++ 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 GNU uCommon C++. If not, see <http://www.gnu.org/licenses/>. |
| |
| /** |
| * Support classes for manipulation of numbers as strings. This is |
| * used for things which parse numbers out of strings, such as in the |
| * date and time classes. Other useful math related functions, templates, |
| * and macros may also be found here. |
| * @file ucommon/numbers.h |
| */ |
| |
| #ifndef _UCOMMON_NUMBERS_H_ |
| #define _UCOMMON_NUMBERS_H_ |
| |
| #ifndef _UCOMMON_CONFIG_H_ |
| #include <ucommon/platform.h> |
| #endif |
| |
| NAMESPACE_UCOMMON |
| |
| /** |
| * A number manipulation class. This is used to extract, convert, |
| * and manage simple numbers that are represented in C ascii strings |
| * in a very quick and optimal way. This class modifies the string |
| * representation each time the value is changed. No math expressions |
| * or explicit comparison operators are supported for the Numbers class |
| * because these are best done by casting to long first. |
| * |
| * @author David Sugar <dyfet@ostel.com> |
| * @short number manipulation. |
| */ |
| class __EXPORT Number |
| { |
| protected: |
| char *buffer; |
| unsigned size; |
| |
| public: |
| /** |
| * Create an instance of a number. |
| * @param buffer or NULL if created internally. |
| * @param size of field if not null terminated. |
| */ |
| Number(char *buffer, unsigned size); |
| |
| /** |
| * Set string based on a new value. |
| * @param value to set. |
| */ |
| void set(long value); |
| |
| /** |
| * Get string buffer representing the number. |
| * @return string buffer. |
| */ |
| inline const char *c_str() const |
| {return buffer;}; |
| |
| /** |
| * Get value of string buffer as a long integer. |
| * @return long integer value of string buffer. |
| */ |
| long get() const; |
| |
| /** |
| * Get value of string buffer as expression of object. |
| * @return long integer value of string buffer. |
| */ |
| inline long operator()() |
| {return get();}; |
| |
| /** |
| * Cast string as long integer and get value of buffer. |
| * @return long integer value of string buffer. |
| */ |
| inline operator long() |
| {return get();}; |
| |
| /** |
| * Cast object as a string to retrieve buffer. |
| * @return string buffer of value. |
| */ |
| inline operator char*() |
| {return buffer;}; |
| |
| /** |
| * Assign a value to the number. This rewrites the string buffer. |
| * @param value to assign. |
| * @return new value of number object assigned. |
| */ |
| long operator=(long value); |
| |
| /** |
| * Assign another number to this number. |
| * @param number to assign to assign. |
| * @return new value of number object assigned. |
| */ |
| long operator=(const Number& number); |
| |
| /** |
| * Add a value to the number. This rewrites the string buffer. |
| * @param value to add. |
| * @return new value of number object. |
| */ |
| long operator+=(const long value); |
| |
| /** |
| * Subtract a value from the number. This rewrites the string buffer. |
| * @param value to subtract. |
| * @return new value of number object. |
| */ |
| long operator-=(const long value); |
| |
| /** |
| * Decrement the number object. This rewrites the string buffer. |
| * @return new value of number object. |
| */ |
| long operator--(); |
| |
| /** |
| * Increment the number object. This rewrites the string buffer. |
| * @return new value of number object. |
| */ |
| long operator++(); |
| |
| inline bool operator==(const long value) const |
| {return get() == value;} |
| |
| inline bool operator!=(const long value) const |
| {return get() != value;} |
| |
| inline bool operator<(const long value) const |
| {return get() < value;} |
| |
| inline bool operator>(const long value) const |
| {return get() > value;} |
| |
| inline bool operator<=(const long value) const |
| {return get() <= value;} |
| |
| inline bool operator>=(const long value) const |
| {return get() >= value;} |
| }; |
| |
| /** |
| * A number manipulation class that maintains a zero lead filled string. |
| * |
| * @author David Sugar <dyfet@ostel.com> |
| * @short zero filled number manipulation. |
| */ |
| class __EXPORT ZNumber : public Number |
| { |
| public: |
| /** |
| * Create a number class for zero fill. |
| * @param pointer to field. |
| * @param size of field to fill. |
| */ |
| ZNumber(char *pointer, unsigned size); |
| |
| /** |
| * Set value of zero filled number. |
| * @param value to set. |
| */ |
| |
| void set(long value); |
| |
| /** |
| * Assign number from value. |
| * @param value to assign. |
| * @return value assigned. |
| */ |
| long operator=(long value); |
| }; |
| |
| /** |
| * A convenience type for number. |
| */ |
| typedef Number number_t; |
| |
| /** |
| * A convenience type for znumber. |
| */ |
| typedef ZNumber znumber_t; |
| |
| /** |
| * Template for absolute value of a type. |
| * @param value to check |
| * @return absolute value |
| */ |
| template<typename T> |
| inline const T abs(const T& value) |
| { |
| if(value < (T)0) |
| return -value; |
| return value; |
| } |
| |
| |
| /** |
| * Template for min value of a type. |
| * @param v1 value to check |
| * @param v2 value to check |
| * @return v1 if < v2, else v2 |
| */ |
| template<typename T> |
| inline const T (min)(const T& v1, const T& v2) |
| { |
| return ((v1 < v2) ? v1 : v2); |
| } |
| |
| /** |
| * Template for max value of a type. |
| * @param v1 value to check |
| * @param v2 value to check |
| * @return v1 if > v2, else v2 |
| */ |
| template<typename T> |
| inline const T (max)(const T& v1, const T& v2) |
| { |
| return ((v1 > v2) ? v1 : v2); |
| } |
| |
| END_NAMESPACE |
| |
| #endif |