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-rw-r--r--libbb/parse_number.c74
1 files changed, 74 insertions, 0 deletions
diff --git a/libbb/parse_number.c b/libbb/parse_number.c
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+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * Copyright (C) tons of folks. Tracking down who wrote what
+ * isn't something I'm going to worry about... If you wrote something
+ * here, please feel free to 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
+ *
+ * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
+ * Permission has been granted to redistribute this code under the GPL.
+ *
+ */
+
+#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:
+*/