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/* PSPP - a program for statistical analysis.
Copyright (C) 2006, 2010 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include <ctype.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* Replaces insignificant digits by # to facilitate textual
comparisons. Not a perfect solution to the general-purpose
comparison problem, because rounding that affects earlier
digits can still cause differences. */
int
main (void)
{
bool in_quotes = false;
bool in_exponent = false;
int digits = 0;
for (;;)
{
int c = getchar ();
if (c == EOF)
break;
else if (c == '\n')
in_quotes = false;
else if (c == '"')
{
in_quotes = !in_quotes;
in_exponent = false;
digits = 0;
}
else if (in_quotes && !in_exponent)
{
if (strchr ("+dDeE", c) != NULL || (c == '-' && digits))
in_exponent = true;
else if (strchr ("0123456789}JKLMNOPQR", c) != NULL)
{
if (digits || c >= '1')
digits++;
if (digits > 13)
c = isdigit (c) ? '#' : '@';
}
}
putchar (c);
}
return EXIT_SUCCESS;
}
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