diff options
Diffstat (limited to 'nuttx/fs/nxffs/nxffs_util.c')
-rw-r--r-- | nuttx/fs/nxffs/nxffs_util.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/nuttx/fs/nxffs/nxffs_util.c b/nuttx/fs/nxffs/nxffs_util.c deleted file mode 100644 index f424e71e0..000000000 --- a/nuttx/fs/nxffs/nxffs_util.c +++ /dev/null @@ -1,181 +0,0 @@ -/**************************************************************************** - * fs/nxffs/nxffs_util.c - * - * Copyright (C) 2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * References: Linux/Documentation/filesystems/romfs.txt - * - * 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 <string.h> - -#include "nxffs.h" - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Public Types - ****************************************************************************/ - -/**************************************************************************** - * Public Variables - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: nxffs_rdle16 - * - * Description: - * Get a (possibly unaligned) 16-bit little endian value. - * - * Input Parameters: - * val - A pointer to the first byte of the little endian value. - * - * Returned Value: - * A uint16_t representing the whole 16-bit integer value - * - ****************************************************************************/ - -uint16_t nxffs_rdle16(FAR const uint8_t *val) -{ - return (uint16_t)val[1] << 8 | (uint16_t)val[0]; -} - -/**************************************************************************** - * Name: nxffs_wrle16 - * - * Description: - * Put a (possibly unaligned) 16-bit little endian value. - * - * Input Parameters: - * dest - A pointer to the first byte to save the little endian value. - * val - The 16-bit value to be saved. - * - * Returned Value: - * None - * - ****************************************************************************/ - -void nxffs_wrle16(uint8_t *dest, uint16_t val) -{ - dest[0] = val & 0xff; /* Little endian means LS byte first in byte stream */ - dest[1] = val >> 8; -} - -/**************************************************************************** - * Name: nxffs_rdle32 - * - * Description: - * Get a (possibly unaligned) 32-bit little endian value. - * - * Input Parameters: - * val - A pointer to the first byte of the little endian value. - * - * Returned Value: - * A uint32_t representing the whole 32-bit integer value - * - ****************************************************************************/ - -uint32_t nxffs_rdle32(FAR const uint8_t *val) -{ - /* Little endian means LS halfword first in byte stream */ - - return (uint32_t)nxffs_rdle16(&val[2]) << 16 | (uint32_t)nxffs_rdle16(val); -} - -/**************************************************************************** - * Name: nxffs_wrle32 - * - * Description: - * Put a (possibly unaligned) 32-bit little endian value. - * - * Input Parameters: - * dest - A pointer to the first byte to save the little endian value. - * val - The 32-bit value to be saved. - * - * Returned Value: - * None - * - ****************************************************************************/ - -void nxffs_wrle32(uint8_t *dest, uint32_t val) -{ - /* Little endian means LS halfword first in byte stream */ - - nxffs_wrle16(dest, (uint16_t)(val & 0xffff)); - nxffs_wrle16(dest+2, (uint16_t)(val >> 16)); -} - -/**************************************************************************** - * Name: nxffs_erased - * - * Description: - * Check if a block of memory is in the erased state. - * - * Input Parameters: - * buffer - Address of the start of the memory to check. - * buflen - The number of bytes to check. - * - * Returned Values: - * The number of erased bytes found at the beginning of the memory region. - * - ****************************************************************************/ - -size_t nxffs_erased(FAR const uint8_t *buffer, size_t buflen) -{ - size_t nerased = 0; - - for (; nerased < buflen; nerased++) - { - if (*buffer != CONFIG_NXFFS_ERASEDSTATE) - { - break; - } - buffer++; - } - - return nerased; -} |