123 lines
2.9 KiB
C
123 lines
2.9 KiB
C
/****************************************************************************
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* apps/system/i2c/i2c_hexdump.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <stdio.h>
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#include <inttypes.h>
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#include <ctype.h>
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#include "i2ctool.h"
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: hexdump_line
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****************************************************************************/
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static int hexdump_line(FAR FILE *ostream, FAR void *addr, int len)
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{
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int i;
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FAR uint8_t *p;
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if (len <= 0)
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{
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return 0;
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}
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/* print at most 16 chars */
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if (len > 16)
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{
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len = 16;
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}
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/* print hex */
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for (i = 0, p = addr; i < len; ++i, ++p)
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{
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if (i % 8 == 0)
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{
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fputc(' ', ostream);
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}
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fprintf(ostream, "%02x ", *p);
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}
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/* pad if necessary */
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if (i <= 8)
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{
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fputc(' ', ostream);
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}
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while (i++ < 16)
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{
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fputs(" ", ostream);
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}
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/* print ASCII */
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fputs(" |", ostream);
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for (i = 0, p = addr; i < len; ++i, ++p)
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{
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fputc(isprint(*p) ? *p : '.', ostream);
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}
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/* pad if necessary */
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while (i++ < 16)
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{
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fputc(' ', ostream);
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}
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fputs("|\n", ostream);
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return len;
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}
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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void i2ctool_hexdump(FAR FILE *outstream, FAR void *addr, int len)
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{
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int nbytes;
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FAR uint8_t *p = addr;
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/* print one line at a time */
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while (len > 0)
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{
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/* print address */
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fprintf(outstream, "%08tx ", p - (uint8_t *)addr);
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/* print one line of data */
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nbytes = hexdump_line(outstream, p, len);
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len -= nbytes;
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p += nbytes;
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}
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}
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