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39 lines
828 B
C
39 lines
828 B
C
/* vi: set sw=4 ts=4: */
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/*
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* Copyright (C) 2003-2004 Erik Andersen <andersen@codepoet.org>
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <getopt.h>
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#include <errno.h>
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#include <assert.h>
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#include <ctype.h>
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#include "libbb.h"
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long bb_xgetlarg(const char *arg, int base, long lower, long upper)
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{
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long result;
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char *endptr;
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int errno_save = errno;
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assert(arg!=NULL);
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/* Don't allow leading whitespace.
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* Wrap isspace in () to make sure we call the
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* function rather than the macro. */
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if ((isspace)(*arg)) {
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bb_show_usage();
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}
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errno = 0;
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result = strtol(arg, &endptr, base);
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if (errno != 0 || *endptr!='\0' || endptr==arg || result < lower || result > upper)
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bb_show_usage();
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errno = errno_save;
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return result;
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}
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