131 lines
3.6 KiB
C
131 lines
3.6 KiB
C
/****************************************************************************
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* tools/detab.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 <stdlib.h>
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#include <string.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#define LINE_SIZE 1024
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/****************************************************************************
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* Private Data
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****************************************************************************/
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static char g_line[LINE_SIZE];
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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int main(int argc, char **argv, char **envp)
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{
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FILE *instream;
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FILE *outstream;
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const char *infile;
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const char *outfile;
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int tabsize = 8;
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int tabmask = 7;
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int newpos;
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int pos;
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int ret = 1;
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int i;
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if (argc == 3)
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{
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infile = argv[1];
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outfile = argv[2];
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}
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else if (argc == 4)
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{
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if (strcmp(argv[1], "-4") != 0)
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{
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fprintf(stderr, "ERROR: Unrecognized option\n");
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fprintf(stderr, "Usage: %s [-4] <source-file> <out-file>\n",
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argv[0]);
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return 1;
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}
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tabsize = 4;
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tabmask = 3;
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infile = argv[2];
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outfile = argv[3];
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}
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else
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{
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fprintf(stderr, "ERROR: At least two arguments expected\n");
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fprintf(stderr, "Usage: %s [-4] <source-file> <out-file>\n", argv[0]);
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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(infile, "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(outfile, "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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while (fgets(g_line, LINE_SIZE, instream) != NULL)
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{
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for (pos = 0, i = 0; i < LINE_SIZE && g_line[i] != '\0'; i++)
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{
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if (g_line[i] == '\t')
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{
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newpos = (pos + tabsize) & ~tabmask;
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for (; pos < newpos; pos++)
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{
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fputc(' ', outstream);
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}
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}
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else
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{
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fputc(g_line[i], outstream);
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pos++;
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}
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}
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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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