141 lines
3.6 KiB
C
141 lines
3.6 KiB
C
/****************************************************************************
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* apps/system/hexed/src/hexword.c
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* hexed word command
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*
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* Copyright (c) 2011, B.ZaaR, All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* The names of contributors may not be used to endorse or promote
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* products derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "bfile.h"
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#include "hexed.h"
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/****************************************************************************
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* Public Data
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****************************************************************************/
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int g_wordsize;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/* Set the word size */
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static int setword(FAR struct command_s *cmd, int optc, char *opt)
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{
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char *s;
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size_t v;
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/* NULL option */
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if (opt == NULL)
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{
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return -EFAULT;
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}
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v = strtoll(opt, &s, 0x10);
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/* No value set in option */
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if (s == opt)
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{
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return -EINVAL;
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}
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/* Set global word size */
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if (optc == 0)
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{
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if (v >= WORD_64)
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{
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g_wordsize = WORD_64;
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}
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else if (v >= WORD_32)
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{
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g_wordsize = WORD_32;
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}
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else if (v >= WORD_16)
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{
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g_wordsize = WORD_16;
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}
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else
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{
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g_wordsize = WORD_8;
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}
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optc = 0; /* no more options accepted */
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}
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else
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{
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/* Too many options specified */
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return -E2BIG;
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}
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return optc;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/* Word command */
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int hexword(FAR struct command_s *cmd, int optc, char *opt)
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{
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/* Invalid command */
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if (cmd == NULL || cmd->id != CMD_WORD)
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{
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return -EINVAL;
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}
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/* Set word size */
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if (optc >= 0)
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{
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optc = setword(cmd, optc, opt);
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}
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else
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{
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optc = 0;
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}
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return optc;
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}
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