ab02801d76
Fixes #171 Under Windows, it is very hard to make a symlink and by default git won't make one to the Arduino API directory, causing annoying build errors. Avoid the issue by duplicating the ArduinoAPI directory explicitly and using CI to verify that there are no differences between the two.
768 lines
17 KiB
C++
768 lines
17 KiB
C++
/*
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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 "Common.h"
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#include "itoa.h"
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#include "deprecated-avr-comp/avr/dtostrf.h"
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#include <float.h>
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namespace arduino {
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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) copy(cstr, 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) 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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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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#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
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String::String(String &&rval)
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{
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init();
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move(rval);
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}
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String::String(StringSumHelper &&rval)
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{
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init();
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move(rval);
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}
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#endif
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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 + 1 /* '-' */ + 1 /* '.' */ + 1 /* '\0' */;
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init();
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char buf[FLOAT_BUF_SIZE];
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decimalPlaces = min(decimalPlaces, FLT_MAX_DECIMAL_PLACES);
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*this = dtostrf(value, (decimalPlaces + 2), 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 + 1 /* '-' */ + 1 /* '.' */ + 1 /* '\0' */;
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init();
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char buf[DOUBLE_BUF_SIZE];
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decimalPlaces = min(decimalPlaces, DBL_MAX_DECIMAL_PLACES);
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*this = dtostrf(value, (decimalPlaces + 2), decimalPlaces, buf);
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}
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String::~String()
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{
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if (buffer) 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) free(buffer);
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buffer = NULL;
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capacity = len = 0;
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}
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unsigned char String::reserve(unsigned int size)
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{
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if (buffer && capacity >= size) return 1;
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if (changeBuffer(size)) {
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if (len == 0) buffer[0] = 0;
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return 1;
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}
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return 0;
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}
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unsigned char 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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buffer = newbuffer;
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capacity = maxStrLen;
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return 1;
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}
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return 0;
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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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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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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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#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
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void String::move(String &rhs)
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{
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if (buffer) {
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if (rhs && capacity >= rhs.len) {
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memcpy(buffer, rhs.buffer, rhs.len);
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len = rhs.len;
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buffer[len] = '\0';
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rhs.len = 0;
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return;
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} else {
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free(buffer);
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}
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}
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buffer = rhs.buffer;
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capacity = rhs.capacity;
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len = rhs.len;
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rhs.buffer = NULL;
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rhs.capacity = 0;
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rhs.len = 0;
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}
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#endif
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String & String::operator = (const String &rhs)
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{
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if (this == &rhs) return *this;
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if (rhs.buffer) copy(rhs.buffer, rhs.len);
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else invalidate();
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return *this;
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}
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#if __cplusplus >= 201103L || defined(__GXX_EXPERIMENTAL_CXX0X__)
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String & String::operator = (String &&rval)
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{
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if (this != &rval) move(rval);
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return *this;
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}
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String & String::operator = (StringSumHelper &&rval)
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{
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if (this != &rval) move(rval);
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return *this;
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}
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#endif
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String & String::operator = (const char *cstr)
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{
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if (cstr) copy(cstr, strlen(cstr));
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else invalidate();
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return *this;
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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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return *this;
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}
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/*********************************************/
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/* concat */
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/*********************************************/
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unsigned char String::concat(const String &s)
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{
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return concat(s.buffer, s.len);
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}
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unsigned char 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) return 0;
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if (length == 0) return 1;
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if (!reserve(newlen)) return 0;
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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 1;
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}
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unsigned char String::concat(const char *cstr)
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{
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if (!cstr) return 0;
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return concat(cstr, strlen(cstr));
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}
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unsigned char String::concat(char c)
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{
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return concat(&c, 1);
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}
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unsigned char 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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unsigned char 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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unsigned char 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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unsigned char 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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unsigned char 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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unsigned char 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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unsigned char 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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unsigned char String::concat(const __FlashStringHelper * str)
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{
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if (!str) return 0;
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int length = strlen_P((const char *) str);
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if (length == 0) return 1;
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unsigned int newlen = len + length;
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if (!reserve(newlen)) return 0;
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strcpy_P(buffer + len, (const char *) str);
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len = newlen;
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return 1;
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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)) 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)) 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)) 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)) 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)) 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)) 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)) 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)) 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)) 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)) a.invalidate();
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return a;
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}
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StringSumHelper & operator + (const StringSumHelper &lhs, const __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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if (s.buffer && s.len > 0) return 0 - *(unsigned char *)s.buffer;
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if (buffer && len > 0) 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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if (cstr && *cstr) return 0 - *(unsigned char *)cstr;
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if (buffer && len > 0) 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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unsigned char 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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unsigned char String::equals(const char *cstr) const
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{
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if (len == 0) return (cstr == NULL || *cstr == 0);
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if (cstr == NULL) return buffer[0] == 0;
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return strcmp(buffer, cstr) == 0;
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}
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unsigned char String::equalsIgnoreCase( const String &s2 ) const
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{
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if (this == &s2) return 1;
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if (len != s2.len) return 0;
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if (len == 0) return 1;
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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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if (tolower(*p1++) != tolower(*p2++)) return 0;
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}
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return 1;
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}
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unsigned char String::startsWith( const String &s2 ) const
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{
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if (len < s2.len) return 0;
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return startsWith(s2, 0);
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}
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unsigned char 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) return 0;
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return strncmp( &buffer[offset], s2.buffer, s2.len ) == 0;
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}
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unsigned char String::endsWith( const String &s2 ) const
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{
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if ( len < s2.len || !buffer || !s2.buffer) return 0;
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return strcmp(&buffer[len - s2.len], s2.buffer) == 0;
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}
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/*********************************************/
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/* Character Access */
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/*********************************************/
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char String::charAt(unsigned int loc) const
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{
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return operator[](loc);
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}
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void String::setCharAt(unsigned int loc, char c)
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{
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if (loc < len) buffer[loc] = c;
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}
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char & String::operator[](unsigned int index)
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{
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static char dummy_writable_char;
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if (index >= len || !buffer) {
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dummy_writable_char = 0;
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return dummy_writable_char;
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}
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return buffer[index];
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}
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char String::operator[]( unsigned int index ) const
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{
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if (index >= len || !buffer) return 0;
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return buffer[index];
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}
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void String::getBytes(unsigned char *buf, unsigned int bufsize, unsigned int index) const
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{
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if (!bufsize || !buf) return;
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if (index >= len) {
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buf[0] = 0;
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return;
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}
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unsigned int n = bufsize - 1;
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if (n > len - index) n = len - index;
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strncpy((char *)buf, buffer + index, n);
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buf[n] = 0;
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}
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/*********************************************/
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/* Search */
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/*********************************************/
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int String::indexOf(char c) const
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{
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return indexOf(c, 0);
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}
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int String::indexOf( char ch, unsigned int fromIndex ) const
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{
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if (fromIndex >= len) return -1;
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const char* temp = strchr(buffer + fromIndex, ch);
|
|
if (temp == NULL) return -1;
|
|
return 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 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 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 = 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
|
|
while ((foundAt = strstr(readFrom, find.buffer)) != NULL) {
|
|
readFrom = foundAt + find.len;
|
|
diff = 0 - diff;
|
|
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 = tolower(*p);
|
|
}
|
|
}
|
|
|
|
void String::toUpperCase(void)
|
|
{
|
|
if (!buffer) return;
|
|
for (char *p = buffer; *p; p++) {
|
|
*p = 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 = 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
|