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-rw-r--r--util-linux/e2p/parse_num.c64
1 files changed, 64 insertions, 0 deletions
diff --git a/util-linux/e2p/parse_num.c b/util-linux/e2p/parse_num.c
new file mode 100644
index 0000000..3910e70
--- /dev/null
+++ b/util-linux/e2p/parse_num.c
@@ -0,0 +1,64 @@
+/*
+ * parse_num.c - Parse the number of blocks
+ *
+ * Copyright (C) 2004,2005 Theodore Ts'o <tytso@mit.edu>
+ *
+ * This file can be redistributed under the terms of the GNU Library General
+ * Public License
+ */
+
+#include "e2p.h"
+
+#include <stdlib.h>
+
+unsigned long parse_num_blocks(const char *arg, int log_block_size)
+{
+ char *p;
+ unsigned long long num;
+
+ num = strtoull(arg, &p, 0);
+
+ if (p[0] && p[1])
+ return 0;
+
+ switch (*p) { /* Using fall-through logic */
+ case 'T': case 't':
+ num <<= 10;
+ case 'G': case 'g':
+ num <<= 10;
+ case 'M': case 'm':
+ num <<= 10;
+ case 'K': case 'k':
+ num >>= log_block_size;
+ break;
+ case 's':
+ num >>= 1;
+ break;
+ case '\0':
+ break;
+ default:
+ return 0;
+ }
+ return num;
+}
+
+#ifdef DEBUG
+#include <unistd.h>
+#include <stdio.h>
+
+main(int argc, char **argv)
+{
+ unsigned long num;
+ int log_block_size = 0;
+
+ if (argc != 2) {
+ fprintf(stderr, "Usage: %s arg\n", argv[0]);
+ exit(1);
+ }
+
+ num = parse_num_blocks(argv[1], log_block_size);
+
+ printf("Parsed number: %lu\n", num);
+ exit(0);
+}
+#endif