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authoryhfudev2015-06-10 14:51:09 -0400
committeryhfudev2015-06-10 14:51:09 -0400
commitd8302371e63a1f26f517370295ab40cc1cc7032a (patch)
tree2d702d19e8800beecd841f51a6246c7e6a01e6f8 /WString.h
downloadaur-d8302371e63a1f26f517370295ab40cc1cc7032a.tar.gz
Initial import
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+/*
+ WString.h - String library for Wiring & Arduino
+ ...mostly rewritten by Paul Stoffregen...
+ Copyright (c) 2009-10 Hernando Barragan. All right reserved.
+ Copyright 2011, Paul Stoffregen, paul@pjrc.com
+
+ This library 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 2.1 of the License, or (at your option) any later version.
+
+ 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+*/
+
+#ifndef String_class_h
+#define String_class_h
+#ifdef __cplusplus
+
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+//#include <avr/pgmspace.h>
+
+// When compiling programs with this class, the following gcc parameters
+// dramatically increase performance and memory (RAM) efficiency, typically
+// with little or no increase in code size.
+// -felide-constructors
+// -std=c++0x
+
+class __FlashStringHelper;
+#define F(string_literal) (reinterpret_cast<const __FlashStringHelper *>(PSTR(string_literal)))
+
+// An inherited class for holding the result of a concatenation. These
+// result objects are assumed to be writable by subsequent concatenations.
+class StringSumHelper;
+
+// The string class
+class String
+{
+ // use a function pointer to allow for "if (s)" without the
+ // complications of an operator bool(). for more information, see:
+ // http://www.artima.com/cppsource/safebool.html
+ typedef void (String::*StringIfHelperType)() const;
+ void StringIfHelper() const {}
+
+public:
+ // constructors
+ // creates a copy of the initial value.
+ // if the initial value is null or invalid, or if memory allocation
+ // fails, the string will be marked as invalid (i.e. "if (s)" will
+ // be false).
+ String(const char *cstr = "");
+ String(const String &str);
+ String(const __FlashStringHelper *str);
+ #ifdef __GXX_EXPERIMENTAL_CXX0X__
+ String(String &&rval);
+ String(StringSumHelper &&rval);
+ #endif
+ explicit String(char c);
+ explicit String(unsigned char, unsigned char base=10);
+ explicit String(int, unsigned char base=10);
+ explicit String(unsigned int, unsigned char base=10);
+ explicit String(long, unsigned char base=10);
+ explicit String(unsigned long, unsigned char base=10);
+ explicit String(float, unsigned char decimalPlaces=2);
+ explicit String(double, unsigned char decimalPlaces=2);
+ ~String(void);
+
+ // memory management
+ // return true on success, false on failure (in which case, the string
+ // is left unchanged). reserve(0), if successful, will validate an
+ // invalid string (i.e., "if (s)" will be true afterwards)
+ unsigned char reserve(unsigned int size);
+ inline unsigned int length(void) const {return len;}
+
+ // creates a copy of the assigned value. if the value is null or
+ // invalid, or if the memory allocation fails, the string will be
+ // marked as invalid ("if (s)" will be false).
+ String & operator = (const String &rhs);
+ String & operator = (const char *cstr);
+ String & operator = (const __FlashStringHelper *str);
+ #ifdef __GXX_EXPERIMENTAL_CXX0X__
+ String & operator = (String &&rval);
+ String & operator = (StringSumHelper &&rval);
+ #endif
+
+ // concatenate (works w/ built-in types)
+
+ // returns true on success, false on failure (in which case, the string
+ // is left unchanged). if the argument is null or invalid, the
+ // concatenation is considered unsucessful.
+ unsigned char concat(const String &str);
+ unsigned char concat(const char *cstr);
+ unsigned char concat(char c);
+ unsigned char concat(unsigned char c);
+ unsigned char concat(int num);
+ unsigned char concat(unsigned int num);
+ unsigned char concat(long num);
+ unsigned char concat(unsigned long num);
+ unsigned char concat(float num);
+ unsigned char concat(double num);
+ unsigned char concat(const __FlashStringHelper * str);
+
+ // if there's not enough memory for the concatenated value, the string
+ // will be left unchanged (but this isn't signalled in any way)
+ String & operator += (const String &rhs) {concat(rhs); return (*this);}
+ String & operator += (const char *cstr) {concat(cstr); return (*this);}
+ String & operator += (char c) {concat(c); return (*this);}
+ String & operator += (unsigned char num) {concat(num); return (*this);}
+ String & operator += (int num) {concat(num); return (*this);}
+ String & operator += (unsigned int num) {concat(num); return (*this);}
+ String & operator += (long num) {concat(num); return (*this);}
+ String & operator += (unsigned long num) {concat(num); return (*this);}
+ String & operator += (float num) {concat(num); return (*this);}
+ String & operator += (double num) {concat(num); return (*this);}
+ String & operator += (const __FlashStringHelper *str){concat(str); return (*this);}
+
+ friend StringSumHelper & operator + (const StringSumHelper &lhs, const String &rhs);
+ friend StringSumHelper & operator + (const StringSumHelper &lhs, const char *cstr);
+ friend StringSumHelper & operator + (const StringSumHelper &lhs, char c);
+ friend StringSumHelper & operator + (const StringSumHelper &lhs, unsigned char num);
+ friend StringSumHelper & operator + (const StringSumHelper &lhs, int num);
+ friend StringSumHelper & operator + (const StringSumHelper &lhs, unsigned int num);
+ friend StringSumHelper & operator + (const StringSumHelper &lhs, long num);
+ friend StringSumHelper & operator + (const StringSumHelper &lhs, unsigned long num);
+ friend StringSumHelper & operator + (const StringSumHelper &lhs, float num);
+ friend StringSumHelper & operator + (const StringSumHelper &lhs, double num);
+ friend StringSumHelper & operator + (const StringSumHelper &lhs, const __FlashStringHelper *rhs);
+
+ // comparison (only works w/ Strings and "strings")
+ operator StringIfHelperType() const { return buffer ? &String::StringIfHelper : 0; }
+ int compareTo(const String &s) const;
+ unsigned char equals(const String &s) const;
+ unsigned char equals(const char *cstr) const;
+ unsigned char operator == (const String &rhs) const {return equals(rhs);}
+ unsigned char operator == (const char *cstr) const {return equals(cstr);}
+ unsigned char operator != (const String &rhs) const {return !equals(rhs);}
+ unsigned char operator != (const char *cstr) const {return !equals(cstr);}
+ unsigned char operator < (const String &rhs) const;
+ unsigned char operator > (const String &rhs) const;
+ unsigned char operator <= (const String &rhs) const;
+ unsigned char operator >= (const String &rhs) const;
+ unsigned char equalsIgnoreCase(const String &s) const;
+ unsigned char startsWith( const String &prefix) const;
+ unsigned char startsWith(const String &prefix, unsigned int offset) const;
+ unsigned char endsWith(const String &suffix) const;
+
+ // character acccess
+ char charAt(unsigned int index) const;
+ void setCharAt(unsigned int index, char c);
+ char operator [] (unsigned int index) const;
+ char& operator [] (unsigned int index);
+ void getBytes(unsigned char *buf, unsigned int bufsize, unsigned int index=0) const;
+ void toCharArray(char *buf, unsigned int bufsize, unsigned int index=0) const
+ {getBytes((unsigned char *)buf, bufsize, index);}
+ const char * c_str() const { return buffer; }
+
+ // search
+ int indexOf( char ch ) const;
+ int indexOf( char ch, unsigned int fromIndex ) const;
+ int indexOf( const String &str ) const;
+ int indexOf( const String &str, unsigned int fromIndex ) const;
+ int lastIndexOf( char ch ) const;
+ int lastIndexOf( char ch, unsigned int fromIndex ) const;
+ int lastIndexOf( const String &str ) const;
+ int lastIndexOf( const String &str, unsigned int fromIndex ) const;
+ String substring( unsigned int beginIndex ) const { return substring(beginIndex, len); };
+ String substring( unsigned int beginIndex, unsigned int endIndex ) const;
+
+ // modification
+ void replace(char find, char replace);
+ void replace(const String& find, const String& replace);
+ void remove(unsigned int index);
+ void remove(unsigned int index, unsigned int count);
+ void toLowerCase(void);
+ void toUpperCase(void);
+ void trim(void);
+
+ // parsing/conversion
+ long toInt(void) const;
+ float toFloat(void) const;
+
+protected:
+ char *buffer; // the actual char array
+ unsigned int capacity; // the array length minus one (for the '\0')
+ unsigned int len; // the String length (not counting the '\0')
+protected:
+ void init(void);
+ void invalidate(void);
+ unsigned char changeBuffer(unsigned int maxStrLen);
+ unsigned char concat(const char *cstr, unsigned int length);
+
+ // copy and move
+ String & copy(const char *cstr, unsigned int length);
+ String & copy(const __FlashStringHelper *pstr, unsigned int length);
+ #ifdef __GXX_EXPERIMENTAL_CXX0X__
+ void move(String &rhs);
+ #endif
+};
+
+class StringSumHelper : public String
+{
+public:
+ StringSumHelper(const String &s) : String(s) {}
+ StringSumHelper(const char *p) : String(p) {}
+ StringSumHelper(char c) : String(c) {}
+ StringSumHelper(unsigned char num) : String(num) {}
+ StringSumHelper(int num) : String(num) {}
+ StringSumHelper(unsigned int num) : String(num) {}
+ StringSumHelper(long num) : String(num) {}
+ StringSumHelper(unsigned long num) : String(num) {}
+ StringSumHelper(float num) : String(num) {}
+ StringSumHelper(double num) : String(num) {}
+};
+
+#endif // __cplusplus
+#endif // String_class_h