148 lines
3.9 KiB
C
148 lines
3.9 KiB
C
/****************************************************************************
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* tools/lowhex.c
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*
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* SPDX-License-Identifier: Apache-2.0
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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 <stdbool.h>
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#include <ctype.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define LINESIZE 1024
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static char g_line[LINESIZE];
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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static inline bool isdelimiter(int ch)
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{
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if (isalnum(ch) || ch == '_')
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{
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return false;
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}
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return true;
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}
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/****************************************************************************
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* Public Data
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****************************************************************************/
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int main(int argc, char **argv)
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{
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FILE *instream;
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FILE *outstream;
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bool delimited;
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bool inhex;
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int ret = 1;
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int i;
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int j;
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if (argc != 3)
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{
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fprintf(stderr, "ERROR: Two arguments expected\n");
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return 1;
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}
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/* Open the source file read-only */
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instream = fopen(argv[1], "r");
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if (instream == NULL)
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{
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fprintf(stderr, "ERROR: Failed to open %s for reading\n", argv[1]);
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return 1;
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}
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/* Open the destination file write-only */
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outstream = fopen(argv[2], "w");
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if (outstream == NULL)
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{
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fprintf(stderr, "ERROR: Failed to open %s for reading\n", argv[2]);
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goto errout_with_instream;
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}
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/* Process each line in the file */
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while ((fgets(g_line, LINESIZE, instream) != NULL))
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{
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/* Search for a '0x' that preceding some delimiting character */
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delimited = true;
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inhex = false;
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for (i = 0;
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i < LINESIZE && g_line[i] != '\n' && g_line[i] != '\0';
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i++)
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{
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if (inhex)
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{
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if (isxdigit(g_line[i]))
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{
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g_line[i] = tolower(g_line[i]);
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}
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else
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{
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inhex = false;
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}
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}
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else if (delimited && g_line[i] == '0')
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{
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j = i + 1;
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if (j < LINESIZE)
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{
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if (g_line[j] == 'x' || g_line[j] == 'X')
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{
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g_line[j] = tolower(g_line[j]);
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inhex = true;
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i = j;
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}
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}
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}
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else
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{
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delimited = isdelimiter(g_line[i]);
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}
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}
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fputs(g_line, outstream);
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}
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ret = 0;
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fclose(outstream);
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errout_with_instream:
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fclose(instream);
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return ret;
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}
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