SdFat/src/FatLib/fstream.cpp

/**
 * Copyright (c) 20011-2017 Bill Greiman
 * This file is part of the SdFat library for SD memory cards.
 *
 * MIT License
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */
#include "fstream.h"
//==============================================================================
/// @cond SHOW_PROTECTED
int16_t FatStreamBase::getch() {
  uint8_t c;
  int8_t s = read(&c, 1);
  if (s != 1) {
    if (s < 0) {
      setstate(badbit);
    } else {
      setstate(eofbit);
    }
    return -1;
  }
  if (c != '\r' || (getmode() & ios::binary)) {
    return c;
  }
  s = read(&c, 1);
  if (s == 1 && c == '\n') {
    return c;
  }
  if (s == 1) {
    seekCur(-1);
  }
  return '\r';
}
//------------------------------------------------------------------------------
void FatStreamBase::open(const char* path, ios::openmode mode) {
  uint8_t flags;
  switch (mode & (app | in | out | trunc)) {
  case app | in:
  case app | in | out:
    flags = O_RDWR | O_APPEND | O_CREAT;
    break;

  case app:
  case app | out:
    flags = O_WRITE | O_APPEND | O_CREAT;
    break;

  case in:
    flags = O_READ;
    break;

  case in | out:
    flags = O_RDWR;
    break;

  case in | out | trunc:
    flags = O_RDWR | O_TRUNC | O_CREAT;
    break;

  case out:
  case out | trunc:
    flags = O_WRITE | O_TRUNC | O_CREAT;
    break;

  default:
    goto fail;
  }
  if (mode & ios::ate) {
    flags |= O_AT_END;
  }
  if (!FatFile::open(path, flags)) {
    goto fail;
  }
  setmode(mode);
  clear();
  return;

fail:
  FatFile::close();
  setstate(failbit);
  return;
}
//------------------------------------------------------------------------------
void FatStreamBase::putch(char c) {
  if (c == '\n' && !(getmode() & ios::binary)) {
    write('\r');
  }
  write(c);
  if (getWriteError()) {
    setstate(badbit);
  }
}
//------------------------------------------------------------------------------
void FatStreamBase::putstr(const char* str) {
  size_t n = 0;
  while (1) {
    char c = str[n];
    if (c == '\0' || (c == '\n' && !(getmode() & ios::binary))) {
      if (n > 0) {
        write(str, n);
      }
      if (c == '\0') {
        break;
      }
      write('\r');
      str += n;
      n = 0;
    }
    n++;
  }
  if (getWriteError()) {
    setstate(badbit);
  }
}
//------------------------------------------------------------------------------
/** Internal do not use
 * \param[in] off
 * \param[in] way
 */
bool FatStreamBase::seekoff(off_type off, seekdir way) {
  pos_type pos;
  switch (way) {
  case beg:
    pos = off;
    break;

  case cur:
    pos = curPosition() + off;
    break;

  case end:
    pos = fileSize() + off;
    break;

  default:
    return false;
  }
  return seekpos(pos);
}
//------------------------------------------------------------------------------
/** Internal do not use
 * \param[in] pos
 */
bool FatStreamBase::seekpos(pos_type pos) {
  return seekSet(pos);
}
//------------------------------------------------------------------------------
int FatStreamBase::write(const void* buf, size_t n) {
  return FatFile::write(buf, n);
}
//------------------------------------------------------------------------------
void FatStreamBase::write(char c) {
  write(&c, 1);
}
/// @endcond