busybox/libbb/parse_number.c

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/* vi: set sw=4 ts=4: */
/*
* Utility routines.
*
* Copyright (C) many different people. If you wrote this, please
* acknowledge your work.
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "libbb.h"
unsigned long parse_number(const char *numstr,
const struct suffix_mult *suffixes)
{
const struct suffix_mult *sm;
unsigned long int ret;
int len;
char *end;
ret = strtoul(numstr, &end, 10);
if (numstr == end)
error_msg_and_die("invalid number `%s'", numstr);
while (end[0] != '\0') {
sm = suffixes;
while ( sm != 0 ) {
if(sm->suffix) {
len = strlen(sm->suffix);
if (strncmp(sm->suffix, end, len) == 0) {
ret *= sm->mult;
end += len;
break;
}
sm++;
} else
sm = 0;
}
if (sm == 0)
error_msg_and_die("invalid number `%s'", numstr);
}
return ret;
}
/* END CODE */
/*
Local Variables:
c-file-style: "linux"
c-basic-offset: 4
tab-width: 4
End:
*/