120 lines
3.8 KiB
C
120 lines
3.8 KiB
C
/****************************************************************************
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* tools/rmcr.c
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*
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* Copyright (C) 2019 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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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
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* 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 <stdio.h>
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#include <stdbool.h>
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#include <string.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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* 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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int len;
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int ret = 1;
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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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/* Remove all whitespace (including newline) from the end of the line */
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len = strlen(g_line) - 1;
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while (len >= 0 && isspace(g_line[len]))
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{
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len--;
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}
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/* Put the newline back. len is either -1, or points to the last, non-
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* space character in the line.
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*/
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g_line[len + 1] = '\n';
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g_line[len + 2] = '\0';
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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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