887 lines
21 KiB
C++
887 lines
21 KiB
C++
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/*
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String library for Wiring & Arduino
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...mostly rewritten by Paul Stoffregen...
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Copyright (c) 2009-10 Hernando Barragan. All rights reserved.
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Copyright 2011, Paul Stoffregen, paul@pjrc.com
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "string.h"
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#include <climits>
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#include <cmath>
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#ifdef ARDUINO
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// nothing
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#elif defined(USE_STD_STR)
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// nothing
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#elif defined(USE_ARDUINO_STR) || defined(USE_OWN_ARDUINO_STR)
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/*
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String library for Wiring & Arduino
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...mostly rewritten by Paul Stoffregen...
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Copyright (c) 2009-10 Hernando Barragan. All rights reserved.
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Copyright 2011, Paul Stoffregen, paul@pjrc.com
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "common.h"
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#include "dtostrf.h"
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#include "itoa.h"
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#include "string.h"
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#include <float.h>
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namespace arduino
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{
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/*********************************************/
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/* Static Member Initialisation */
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/*********************************************/
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size_t const String::FLT_MAX_DECIMAL_PLACES;
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size_t const String::DBL_MAX_DECIMAL_PLACES;
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/*********************************************/
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/* Constructors */
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/*********************************************/
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String::String(const char* cstr)
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{
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init();
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if (cstr)
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copy(cstr, static_cast<unsigned int>(strlen(cstr)));
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}
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String::String(const char* cstr, unsigned int length)
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{
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init();
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if (cstr)
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copy(cstr, length);
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}
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String::String(const String& value)
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{
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init();
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*this = value;
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}
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//
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// String::String(const __FlashStringHelper *pstr)
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//{
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// init();
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// *this = pstr;
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//}
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String::String(String&& rval)
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: buffer(rval.buffer), capacity(rval.capacity), len(rval.len)
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{
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rval.buffer = NULL;
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rval.capacity = 0;
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rval.len = 0;
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}
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String::String(char c)
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{
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init();
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char buf[2];
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buf[0] = c;
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buf[1] = 0;
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*this = buf;
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}
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String::String(unsigned char value, unsigned char base)
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{
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init();
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char buf[1 + 8 * sizeof(unsigned char)];
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utoa(value, buf, base);
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*this = buf;
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}
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String::String(int value, unsigned char base)
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{
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init();
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char buf[2 + 8 * sizeof(int)];
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itoa(value, buf, base);
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*this = buf;
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}
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String::String(unsigned int value, unsigned char base)
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{
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init();
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char buf[1 + 8 * sizeof(unsigned int)];
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utoa(value, buf, base);
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*this = buf;
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}
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String::String(long value, unsigned char base)
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{
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init();
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char buf[2 + 8 * sizeof(long)];
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ltoa(value, buf, base);
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*this = buf;
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}
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String::String(unsigned long value, unsigned char base)
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{
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init();
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char buf[1 + 8 * sizeof(unsigned long)];
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ultoa(value, buf, base);
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*this = buf;
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}
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String::String(float value, unsigned char decimalPlaces)
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{
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static size_t const FLOAT_BUF_SIZE = FLT_MAX_10_EXP + FLT_MAX_DECIMAL_PLACES +
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1 /* '-' */ + 1 /* '.' */ + 1 /* '\0' */;
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init();
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char buf[FLOAT_BUF_SIZE];
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decimalPlaces =
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min(decimalPlaces, static_cast<unsigned char>(FLT_MAX_DECIMAL_PLACES));
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*this = dtostrf(value, static_cast<signed char>(decimalPlaces + 2),
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decimalPlaces, buf);
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}
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String::String(double value, unsigned char decimalPlaces)
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{
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static size_t const DOUBLE_BUF_SIZE = DBL_MAX_10_EXP + DBL_MAX_DECIMAL_PLACES +
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1 /* '-' */ + 1 /* '.' */ + 1 /* '\0' */;
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init();
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char buf[DOUBLE_BUF_SIZE];
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decimalPlaces =
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min(decimalPlaces, static_cast<unsigned char>(DBL_MAX_DECIMAL_PLACES));
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// Check if the value is a whole number (no fractional part)
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if (value == floor(value) && value >= INT_MIN && value <= INT_MAX)
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{
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// Format as integer (no decimal places)
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*this = dtostrf(value, 1, 0, buf);
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}
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else
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{
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// Format with specified decimal places
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*this = dtostrf(value, static_cast<signed char>(decimalPlaces + 2),
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decimalPlaces, buf);
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}
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}
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String::~String()
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{
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if (buffer)
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free(buffer);
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}
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/*********************************************/
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/* Memory Management */
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/*********************************************/
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inline void String::init(void)
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{
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buffer = NULL;
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capacity = 0;
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len = 0;
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}
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void String::invalidate(void)
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{
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if (buffer)
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free(buffer);
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buffer = NULL;
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capacity = len = 0;
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}
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bool String::reserve(unsigned int size)
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{
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if (buffer && capacity >= size)
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return 1;
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if (changeBuffer(size))
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{
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if (len == 0)
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buffer[0] = 0;
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return true;
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}
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return false;
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}
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bool String::changeBuffer(unsigned int maxStrLen)
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{
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char* newbuffer = (char*)realloc(buffer, maxStrLen + 1);
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if (newbuffer)
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{
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buffer = newbuffer;
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capacity = maxStrLen;
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return true;
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}
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return false;
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}
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/*********************************************/
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/* Copy and Move */
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/*********************************************/
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String& String::copy(const char* cstr, unsigned int length)
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{
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if (!reserve(length))
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{
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invalidate();
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return *this;
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}
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len = length;
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memcpy(buffer, cstr, length);
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buffer[len] = '\0';
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return *this;
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}
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//
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// String & String::copy(const __FlashStringHelper *pstr, unsigned int length)
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//{
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// if (!reserve(length)) {
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// invalidate();
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// return *this;
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// }
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// len = length;
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// strcpy_P(buffer, (PGM_P)pstr);
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// return *this;
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//}
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void String::move(String& rhs)
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{
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if (this != &rhs)
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{
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free(buffer);
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buffer = rhs.buffer;
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len = rhs.len;
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capacity = rhs.capacity;
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rhs.buffer = NULL;
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rhs.len = 0;
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rhs.capacity = 0;
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}
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}
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String& String::operator=(const String& rhs)
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{
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if (this == &rhs)
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return *this;
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if (rhs.buffer)
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copy(rhs.buffer, rhs.len);
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else
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invalidate();
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return *this;
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}
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String& String::operator=(String&& rval)
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{
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move(rval);
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return *this;
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}
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String& String::operator=(const char* cstr)
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{
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if (cstr)
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copy(cstr, static_cast<unsigned int>(strlen(cstr)));
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else
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invalidate();
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return *this;
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}
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//
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// String & String::operator = (const __FlashStringHelper *pstr)
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//{
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// if (pstr) copy(pstr, strlen_P((PGM_P)pstr));
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// else invalidate();
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//
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// return *this;
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//}
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/*********************************************/
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/* concat */
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/*********************************************/
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bool String::concat(const String& s) { return concat(s.buffer, s.len); }
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bool String::concat(const char* cstr, unsigned int length)
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{
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unsigned int newlen = len + length;
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if (!cstr)
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return false;
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if (length == 0)
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return true;
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if (!reserve(newlen))
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return false;
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memcpy(buffer + len, cstr, length);
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len = newlen;
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buffer[len] = '\0';
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return true;
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}
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bool String::concat(const char* cstr)
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{
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if (!cstr)
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return false;
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return concat(cstr, static_cast<unsigned int>(strlen(cstr)));
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}
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bool String::concat(char c) { return concat(&c, 1); }
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bool String::concat(unsigned char num)
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{
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char buf[1 + 3 * sizeof(unsigned char)];
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itoa(num, buf, 10);
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return concat(buf);
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}
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bool String::concat(int num)
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{
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char buf[2 + 3 * sizeof(int)];
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itoa(num, buf, 10);
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return concat(buf);
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}
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bool String::concat(unsigned int num)
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{
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char buf[1 + 3 * sizeof(unsigned int)];
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utoa(num, buf, 10);
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return concat(buf);
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}
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bool String::concat(long num)
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{
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char buf[2 + 3 * sizeof(long)];
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ltoa(num, buf, 10);
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return concat(buf);
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}
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bool String::concat(unsigned long num)
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{
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char buf[1 + 3 * sizeof(unsigned long)];
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ultoa(num, buf, 10);
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return concat(buf);
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}
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bool String::concat(float num)
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{
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char buf[20];
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char* string = dtostrf(num, 4, 2, buf);
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return concat(string);
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}
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bool String::concat(double num)
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{
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char buf[20];
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char* string = dtostrf(num, 4, 2, buf);
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return concat(string);
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}
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//
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// bool String::concat(const __FlashStringHelper * str)
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//{
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// if (!str) return false;
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// int length = strlen_P((const char *) str);
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// if (length == 0) return true;
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// unsigned int newlen = len + length;
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// if (!reserve(newlen)) return false;
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// strcpy_P(buffer + len, (const char *) str);
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// len = newlen;
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// return true;
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//}
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/*********************************************/
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/* Concatenate */
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/*********************************************/
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StringSumHelper& operator+(const StringSumHelper& lhs, const String& rhs)
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{
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StringSumHelper& a = const_cast<StringSumHelper&>(lhs);
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if (!a.concat(rhs.buffer, rhs.len))
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a.invalidate();
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return a;
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}
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StringSumHelper& operator+(const StringSumHelper& lhs, const char* cstr)
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{
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StringSumHelper& a = const_cast<StringSumHelper&>(lhs);
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if (!cstr || !a.concat(cstr))
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a.invalidate();
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return a;
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}
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StringSumHelper& operator+(const StringSumHelper& lhs, char c)
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{
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StringSumHelper& a = const_cast<StringSumHelper&>(lhs);
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if (!a.concat(c))
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a.invalidate();
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return a;
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}
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StringSumHelper& operator+(const StringSumHelper& lhs, unsigned char num)
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{
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StringSumHelper& a = const_cast<StringSumHelper&>(lhs);
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if (!a.concat(num))
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a.invalidate();
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return a;
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}
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StringSumHelper& operator+(const StringSumHelper& lhs, int num)
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{
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StringSumHelper& a = const_cast<StringSumHelper&>(lhs);
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if (!a.concat(num))
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a.invalidate();
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return a;
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}
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StringSumHelper& operator+(const StringSumHelper& lhs, unsigned int num)
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{
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StringSumHelper& a = const_cast<StringSumHelper&>(lhs);
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if (!a.concat(num))
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a.invalidate();
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return a;
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}
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StringSumHelper& operator+(const StringSumHelper& lhs, long num)
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{
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StringSumHelper& a = const_cast<StringSumHelper&>(lhs);
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if (!a.concat(num))
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a.invalidate();
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return a;
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}
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StringSumHelper& operator+(const StringSumHelper& lhs, unsigned long num)
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{
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StringSumHelper& a = const_cast<StringSumHelper&>(lhs);
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if (!a.concat(num))
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a.invalidate();
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return a;
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}
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StringSumHelper& operator+(const StringSumHelper& lhs, float num)
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{
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StringSumHelper& a = const_cast<StringSumHelper&>(lhs);
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if (!a.concat(num))
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a.invalidate();
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return a;
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}
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StringSumHelper& operator+(const StringSumHelper& lhs, double num)
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{
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StringSumHelper& a = const_cast<StringSumHelper&>(lhs);
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if (!a.concat(num))
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a.invalidate();
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return a;
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}
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//
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// StringSumHelper & operator + (const StringSumHelper &lhs, const
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// __FlashStringHelper *rhs)
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//{
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// StringSumHelper &a = const_cast<StringSumHelper&>(lhs);
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// if (!a.concat(rhs)) a.invalidate();
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// return a;
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//}
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/*********************************************/
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/* Comparison */
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/*********************************************/
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int String::compareTo(const String& s) const
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{
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if (!buffer || !s.buffer)
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{
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if (s.buffer && s.len > 0)
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return 0 - *(unsigned char*)s.buffer;
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if (buffer && len > 0)
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return *(unsigned char*)buffer;
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return 0;
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}
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return strcmp(buffer, s.buffer);
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}
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int String::compareTo(const char* cstr) const
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{
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if (!buffer || !cstr)
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{
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if (cstr && *cstr)
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return 0 - *(unsigned char*)cstr;
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if (buffer && len > 0)
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return *(unsigned char*)buffer;
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return 0;
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}
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return strcmp(buffer, cstr);
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}
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bool String::equals(const String& s2) const
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{
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return (len == s2.len && compareTo(s2) == 0);
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}
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bool String::equals(const char* cstr) const
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{
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if (len == 0)
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return (cstr == NULL || *cstr == 0);
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if (cstr == NULL)
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return buffer[0] == 0;
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return strcmp(buffer, cstr) == 0;
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}
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bool String::equalsIgnoreCase(const String& s2) const
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{
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if (this == &s2)
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return true;
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if (len != s2.len)
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return false;
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if (len == 0)
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return true;
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const char* p1 = buffer;
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const char* p2 = s2.buffer;
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while (*p1)
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{
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if (tolower(*p1++) != tolower(*p2++))
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return false;
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}
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return true;
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}
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bool String::startsWith(const String& s2) const
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{
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if (len < s2.len)
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return false;
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return startsWith(s2, 0);
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}
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bool String::startsWith(const String& s2, unsigned int offset) const
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{
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if (offset > len - s2.len || !buffer || !s2.buffer)
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return false;
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return strncmp(&buffer[offset], s2.buffer, s2.len) == 0;
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}
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bool String::endsWith(const String& s2) const
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{
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if (len < s2.len || !buffer || !s2.buffer)
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return false;
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return strcmp(&buffer[len - s2.len], s2.buffer) == 0;
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}
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|
/*********************************************/
|
|
/* Character Access */
|
|
/*********************************************/
|
|
|
|
char String::charAt(unsigned int loc) const { return operator[](loc); }
|
|
|
|
void String::setCharAt(unsigned int loc, char c)
|
|
{
|
|
if (loc < len)
|
|
buffer[loc] = c;
|
|
}
|
|
|
|
char& String::operator[](unsigned int index)
|
|
{
|
|
static char dummy_writable_char;
|
|
if (index >= len || !buffer)
|
|
{
|
|
dummy_writable_char = 0;
|
|
return dummy_writable_char;
|
|
}
|
|
return buffer[index];
|
|
}
|
|
|
|
char String::operator[](unsigned int index) const
|
|
{
|
|
if (index >= len || !buffer)
|
|
return 0;
|
|
return buffer[index];
|
|
}
|
|
|
|
void String::getBytes(unsigned char* buf, unsigned int bufsize,
|
|
unsigned int index) const
|
|
{
|
|
if (!bufsize || !buf)
|
|
return;
|
|
if (index >= len)
|
|
{
|
|
buf[0] = 0;
|
|
return;
|
|
}
|
|
unsigned int n = bufsize - 1;
|
|
if (n > len - index)
|
|
n = len - index;
|
|
strncpy((char*)buf, buffer + index, n);
|
|
buf[n] = 0;
|
|
}
|
|
|
|
/*********************************************/
|
|
/* Search */
|
|
/*********************************************/
|
|
|
|
int String::indexOf(char c) const { return indexOf(c, 0); }
|
|
|
|
int String::indexOf(char ch, unsigned int fromIndex) const
|
|
{
|
|
if (fromIndex >= len)
|
|
return -1;
|
|
const char* temp = strchr(buffer + fromIndex, ch);
|
|
if (temp == NULL)
|
|
return -1;
|
|
return static_cast<int>(temp - buffer);
|
|
}
|
|
|
|
int String::indexOf(const String& s2) const { return indexOf(s2, 0); }
|
|
|
|
int String::indexOf(const String& s2, unsigned int fromIndex) const
|
|
{
|
|
if (fromIndex >= len)
|
|
return -1;
|
|
const char* found = strstr(buffer + fromIndex, s2.buffer);
|
|
if (found == NULL)
|
|
return -1;
|
|
return static_cast<int>(found - buffer);
|
|
}
|
|
|
|
int String::lastIndexOf(char theChar) const { return lastIndexOf(theChar, len - 1); }
|
|
|
|
int String::lastIndexOf(char ch, unsigned int fromIndex) const
|
|
{
|
|
if (fromIndex >= len)
|
|
return -1;
|
|
char tempchar = buffer[fromIndex + 1];
|
|
buffer[fromIndex + 1] = '\0';
|
|
char* temp = strrchr(buffer, ch);
|
|
buffer[fromIndex + 1] = tempchar;
|
|
if (temp == NULL)
|
|
return -1;
|
|
return static_cast<int>(temp - buffer);
|
|
}
|
|
|
|
int String::lastIndexOf(const String& s2) const
|
|
{
|
|
return lastIndexOf(s2, len - s2.len);
|
|
}
|
|
|
|
int String::lastIndexOf(const String& s2, unsigned int fromIndex) const
|
|
{
|
|
if (s2.len == 0 || len == 0 || s2.len > len)
|
|
return -1;
|
|
if (fromIndex >= len)
|
|
fromIndex = len - 1;
|
|
int found = -1;
|
|
for (char* p = buffer; p <= buffer + fromIndex; p++)
|
|
{
|
|
p = strstr(p, s2.buffer);
|
|
if (!p)
|
|
break;
|
|
if ((unsigned int)(p - buffer) <= fromIndex)
|
|
found = static_cast<int>(p - buffer);
|
|
}
|
|
return found;
|
|
}
|
|
|
|
String String::substring(unsigned int left, unsigned int right) const
|
|
{
|
|
if (left > right)
|
|
{
|
|
unsigned int temp = right;
|
|
right = left;
|
|
left = temp;
|
|
}
|
|
String out;
|
|
if (left >= len)
|
|
return out;
|
|
if (right > len)
|
|
right = len;
|
|
out.copy(buffer + left, right - left);
|
|
return out;
|
|
}
|
|
|
|
/*********************************************/
|
|
/* Modification */
|
|
/*********************************************/
|
|
|
|
void String::replace(char find, char replace)
|
|
{
|
|
if (!buffer)
|
|
return;
|
|
for (char* p = buffer; *p; p++)
|
|
{
|
|
if (*p == find)
|
|
*p = replace;
|
|
}
|
|
}
|
|
|
|
void String::replace(const String& find, const String& replace)
|
|
{
|
|
if (len == 0 || find.len == 0)
|
|
return;
|
|
int diff = replace.len - find.len;
|
|
char* readFrom = buffer;
|
|
char* foundAt;
|
|
if (diff == 0)
|
|
{
|
|
while ((foundAt = strstr(readFrom, find.buffer)) != NULL)
|
|
{
|
|
memcpy(foundAt, replace.buffer, replace.len);
|
|
readFrom = foundAt + replace.len;
|
|
}
|
|
}
|
|
else if (diff < 0)
|
|
{
|
|
unsigned int size = len; // compute size needed for result
|
|
diff = 0 - diff;
|
|
while ((foundAt = strstr(readFrom, find.buffer)) != NULL)
|
|
{
|
|
readFrom = foundAt + find.len;
|
|
size -= diff;
|
|
}
|
|
if (size == len)
|
|
return;
|
|
int index = len - 1;
|
|
while (index >= 0 && (index = lastIndexOf(find, index)) >= 0)
|
|
{
|
|
readFrom = buffer + index + find.len;
|
|
memmove(readFrom - diff, readFrom, len - (readFrom - buffer));
|
|
len -= diff;
|
|
buffer[len] = 0;
|
|
memcpy(buffer + index, replace.buffer, replace.len);
|
|
index--;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
unsigned int size = len; // compute size needed for result
|
|
while ((foundAt = strstr(readFrom, find.buffer)) != NULL)
|
|
{
|
|
readFrom = foundAt + find.len;
|
|
size += diff;
|
|
}
|
|
if (size == len)
|
|
return;
|
|
if (size > capacity && !changeBuffer(size))
|
|
return; // XXX: tell user!
|
|
int index = len - 1;
|
|
while (index >= 0 && (index = lastIndexOf(find, index)) >= 0)
|
|
{
|
|
readFrom = buffer + index + find.len;
|
|
memmove(readFrom + diff, readFrom, len - (readFrom - buffer));
|
|
len += diff;
|
|
buffer[len] = 0;
|
|
memcpy(buffer + index, replace.buffer, replace.len);
|
|
index--;
|
|
}
|
|
}
|
|
}
|
|
|
|
void String::remove(unsigned int index)
|
|
{
|
|
// Pass the biggest integer as the count. The remove method
|
|
// below will take care of truncating it at the end of the
|
|
// string.
|
|
remove(index, (unsigned int)-1);
|
|
}
|
|
|
|
void String::remove(unsigned int index, unsigned int count)
|
|
{
|
|
if (index >= len)
|
|
{
|
|
return;
|
|
}
|
|
if (count <= 0)
|
|
{
|
|
return;
|
|
}
|
|
if (count > len - index)
|
|
{
|
|
count = len - index;
|
|
}
|
|
char* writeTo = buffer + index;
|
|
len = len - count;
|
|
memmove(writeTo, buffer + index + count, len - index);
|
|
buffer[len] = 0;
|
|
}
|
|
|
|
void String::toLowerCase(void)
|
|
{
|
|
if (!buffer)
|
|
return;
|
|
for (char* p = buffer; *p; p++)
|
|
{
|
|
*p = static_cast<char>(tolower(*p));
|
|
}
|
|
}
|
|
|
|
void String::toUpperCase(void)
|
|
{
|
|
if (!buffer)
|
|
return;
|
|
for (char* p = buffer; *p; p++)
|
|
{
|
|
*p = static_cast<char>(toupper(*p));
|
|
}
|
|
}
|
|
|
|
void String::trim(void)
|
|
{
|
|
if (!buffer || len == 0)
|
|
return;
|
|
char* begin = buffer;
|
|
while (isspace(*begin))
|
|
begin++;
|
|
char* end = buffer + len - 1;
|
|
while (isspace(*end) && end >= begin)
|
|
end--;
|
|
len = static_cast<unsigned int>(end + 1 - begin);
|
|
if (begin > buffer)
|
|
memmove(buffer, begin, len);
|
|
buffer[len] = 0;
|
|
}
|
|
|
|
/*********************************************/
|
|
/* Parsing / Conversion */
|
|
/*********************************************/
|
|
|
|
long String::toInt(void) const
|
|
{
|
|
if (buffer)
|
|
return atol(buffer);
|
|
return 0;
|
|
}
|
|
|
|
float String::toFloat(void) const { return float(toDouble()); }
|
|
|
|
double String::toDouble(void) const
|
|
{
|
|
if (buffer)
|
|
return atof(buffer);
|
|
return 0;
|
|
}
|
|
|
|
} // namespace arduino
|
|
|
|
#endif // defined(ARDUINO)
|