diff options
Diffstat (limited to 'nuttx/drivers/bch/bchlib_write.c')
| -rw-r--r-- | nuttx/drivers/bch/bchlib_write.c | 216 |
1 files changed, 0 insertions, 216 deletions
diff --git a/nuttx/drivers/bch/bchlib_write.c b/nuttx/drivers/bch/bchlib_write.c deleted file mode 100644 index 8d7dcf26f..000000000 --- a/nuttx/drivers/bch/bchlib_write.c +++ /dev/null @@ -1,216 +0,0 @@ -/**************************************************************************** - * drivers/bch/bchlib_write.c - * - * Copyright (C) 2008-2009, 2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name NuttX nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include <nuttx/config.h> - -#include <sys/types.h> -#include <stdint.h> -#include <stdbool.h> -#include <string.h> -#include <errno.h> -#include <assert.h> -#include <debug.h> - -#include <nuttx/fs/fs.h> - -#include "bch_internal.h" - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/**************************************************************************** - * Private Function Prototypes - ****************************************************************************/ - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: bchlib_write - * - * Description: - * Write to the block device set-up by bchlib_setup as if it were a character - * device. - * - ****************************************************************************/ - -ssize_t bchlib_write(FAR void *handle, FAR const char *buffer, size_t offset, size_t len) -{ - FAR struct bchlib_s *bch = (FAR struct bchlib_s *)handle; - size_t nsectors; - size_t sector; - uint16_t sectoffset; - size_t nbytes; - size_t byteswritten; - int ret; - - /* Get rid of this special case right away */ - - if (len < 1) - { - return 0; - } - - /* Convert the file position into a sector number an offset. */ - - sector = offset / bch->sectsize; - sectoffset = offset - sector * bch->sectsize; - - if (sector >= bch->nsectors) - { - return -EFBIG; - } - - /* Write the initial partial sector */ - - byteswritten = 0; - if (sectoffset > 0) - { - /* Read the full sector into the sector buffer */ - - bchlib_readsector(bch, sector); - - /* Copy the tail end of the sector from the user buffer */ - - if (sectoffset + len > bch->sectsize) - { - nbytes = bch->sectsize - sectoffset; - } - else - { - nbytes = len; - } - - memcpy(&bch->buffer[sectoffset], buffer, nbytes); - bch->dirty = true; - - /* Adjust pointers and counts */ - - sectoffset = 0; - sector++; - - if (sector >= bch->nsectors) - { - return nbytes; - } - - byteswritten = nbytes; - buffer += nbytes; - len -= nbytes; - } - - /* Then write all of the full sectors following the partial sector - * directly from the user buffer. - */ - - if (len >= bch->sectsize ) - { - nsectors = len / bch->sectsize; - if (sector + nsectors > bch->nsectors) - { - nsectors = bch->nsectors - sector; - } - - /* Write the contiguous sectors */ - - ret = bch->inode->u.i_bops->write(bch->inode, (FAR uint8_t *)buffer, - sector, nsectors); - if (ret < 0) - { - fdbg("Write failed: %d\n", ret); - return ret; - } - - /* Adjust pointers and counts */ - - sectoffset = 0; - sector += nsectors; - - nbytes = nsectors * bch->sectsize; - byteswritten += nbytes; - - if (sector >= bch->nsectors) - { - return byteswritten; - } - - buffer += nbytes; - len -= nbytes; - } - - /* Then write any partial final sector */ - - if (len > 0) - { - /* Read the sector into the sector buffer */ - - bchlib_readsector(bch, sector); - - /* Copy the head end of the sector from the user buffer */ - - memcpy(bch->buffer, buffer, len); - bch->dirty = true; - - /* Adjust counts */ - - byteswritten += len; - } - - /* Finally, flush any cached writes to the device as well */ - - ret = bchlib_flushsector(bch); - if (ret < 0) - { - fdbg("Flush failed: %d\n", ret); - return ret; - } - - return byteswritten; -} - |