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/*
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 * trims any space, tab, cr or lf
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 * Copyright (C) 2012-2021 Mateusz Viste
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 */
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#include "trim.h"
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void trim(char *str) {
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  int x, y, firstchar = -1, lastchar = -1;
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  /* find out first and last non-whitespace char */
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  for (x = 0; str[x] != 0; x++) {
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    switch (str[x]) {
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      case ' ':
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      case '\t':
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      case '\n':
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      case '\r':
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        break;
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      default:
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        if (firstchar < 0) firstchar = x;
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        lastchar = x;
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        break;
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    }
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  }
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  /* right trim */
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  str[lastchar + 1] = 0;
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  /* left trim (shift to the left ) */
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  if (firstchar > 0) {
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    y = 0;
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    for (x = firstchar; str[x] != 0; x++) str[y++] = str[x];
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    str[y] = 0;
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  }
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}