173 lines
4.1 KiB
C++
173 lines
4.1 KiB
C++
/**
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* Copyright (c) 2011-2018 Bill Greiman
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* This file is part of the SdFat library for SD memory cards.
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*
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* MIT License
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef bufstream_h
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#define bufstream_h
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/**
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* \file
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* \brief \ref ibufstream and \ref obufstream classes
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*/
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#include <string.h>
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#include "iostream.h"
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//==============================================================================
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/**
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* \class ibufstream
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* \brief parse a char string
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*/
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class ibufstream : public istream {
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public:
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/** Constructor */
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ibufstream() : m_buf(0), m_len(0) {}
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/** Constructor
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* \param[in] str pointer to string to be parsed
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* Warning: The string will not be copied so must stay in scope.
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*/
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explicit ibufstream(const char* str) {
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init(str);
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}
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/** Initialize an ibufstream
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* \param[in] str pointer to string to be parsed
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* Warning: The string will not be copied so must stay in scope.
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*/
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void init(const char* str) {
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m_buf = str;
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m_len = strlen(m_buf);
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m_pos = 0;
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clear();
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}
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protected:
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/// @cond SHOW_PROTECTED
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int16_t getch() {
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if (m_pos < m_len) {
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return m_buf[m_pos++];
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}
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setstate(eofbit);
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return -1;
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}
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void getpos(FatPos_t *pos) {
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pos->position = m_pos;
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}
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bool seekoff(off_type off, seekdir way) {
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(void)off;
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(void)way;
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return false;
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}
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bool seekpos(pos_type pos) {
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if (pos < m_len) {
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m_pos = pos;
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return true;
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}
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return false;
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}
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void setpos(FatPos_t *pos) {
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m_pos = pos->position;
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}
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pos_type tellpos() {
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return m_pos;
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}
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/// @endcond
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private:
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const char* m_buf;
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size_t m_len;
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size_t m_pos;
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};
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//==============================================================================
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/**
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* \class obufstream
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* \brief format a char string
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*/
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class obufstream : public ostream {
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public:
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/** constructor */
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obufstream() : m_in(0) {}
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/** Constructor
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* \param[in] buf buffer for formatted string
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* \param[in] size buffer size
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*/
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obufstream(char *buf, size_t size) {
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init(buf, size);
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}
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/** Initialize an obufstream
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* \param[in] buf buffer for formatted string
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* \param[in] size buffer size
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*/
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void init(char *buf, size_t size) {
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m_buf = buf;
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buf[0] = '\0';
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m_size = size;
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m_in = 0;
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}
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/** \return a pointer to the buffer */
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char* buf() {
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return m_buf;
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}
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/** \return the length of the formatted string */
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size_t length() {
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return m_in;
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}
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protected:
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/// @cond SHOW_PROTECTED
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void putch(char c) {
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if (m_in >= (m_size - 1)) {
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setstate(badbit);
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return;
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}
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m_buf[m_in++] = c;
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m_buf[m_in] = '\0';
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}
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void putstr(const char *str) {
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while (*str) {
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putch(*str++);
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}
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}
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bool seekoff(off_type off, seekdir way) {
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(void)off;
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(void)way;
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return false;
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}
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bool seekpos(pos_type pos) {
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if (pos > m_in) {
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return false;
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}
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m_in = pos;
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m_buf[m_in] = '\0';
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return true;
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}
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bool sync() {
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return true;
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}
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pos_type tellpos() {
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return m_in;
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}
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/// @endcond
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private:
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char *m_buf;
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size_t m_size;
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size_t m_in;
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};
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#endif // bufstream_h
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