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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 09:25:10 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 09:25:10 +0000
commit5dced3d1b3deca80e01415a2e35dc7972dcbfae7 (patch)
tree6a403684e0978f0287d7f0ec0e5aab1fd31a59e1 /lib/e2p/parse_num.c
parentInitial commit. (diff)
downloade2fsprogs-5dced3d1b3deca80e01415a2e35dc7972dcbfae7.tar.xz
e2fsprogs-5dced3d1b3deca80e01415a2e35dc7972dcbfae7.zip
Adding upstream version 1.47.0.upstream/1.47.0
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'lib/e2p/parse_num.c')
-rw-r--r--lib/e2p/parse_num.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/lib/e2p/parse_num.c b/lib/e2p/parse_num.c
new file mode 100644
index 0000000..e8d6283
--- /dev/null
+++ b/lib/e2p/parse_num.c
@@ -0,0 +1,91 @@
+/*
+ * parse_num.c - Parse the number of blocks
+ *
+ * Copyright (C) 2004,2005 Theodore Ts'o <tytso@mit.edu>
+ *
+ * %Begin-Header%
+ * This file may be redistributed under the terms of the GNU Library
+ * General Public License, version 2.
+ * %End-Header%
+ */
+
+#include "config.h"
+#include "e2p.h"
+
+#include <stdlib.h>
+
+unsigned long long parse_num_blocks2(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;
+ /* fallthrough */
+ case 'G': case 'g':
+ num <<= 10;
+ /* fallthrough */
+ case 'M': case 'm':
+ num <<= 10;
+ /* fallthrough */
+ case 'K': case 'k':
+ if (log_block_size < 0)
+ num <<= 10;
+ else
+ num >>= log_block_size;
+ break;
+ case 's':
+ if (log_block_size < 0)
+ num <<= 9;
+ else
+ num >>= (1+log_block_size);
+ break;
+ case '\0':
+ break;
+ default:
+ return 0;
+ }
+ return num;
+}
+
+unsigned long parse_num_blocks(const char *arg, int log_block_size)
+{
+ return parse_num_blocks2(arg, log_block_size);
+}
+
+#ifdef DEBUG
+#include <unistd.h>
+#include <stdio.h>
+
+main(int argc, char **argv)
+{
+ unsigned long num;
+ int log_block_size = 0;
+
+ if (argc != 2 && argc != 3) {
+ fprintf(stderr, "Usage: %s arg [log_block_size]\n", argv[0]);
+ exit(1);
+ }
+
+ if (argc == 3) {
+ char *p;
+
+ log_block_size = strtol(argv[2], &p, 0);
+ if (*p) {
+ fprintf(stderr, "Bad log_block_size: %s\n", argv[2]);
+ exit(1);
+ }
+ }
+
+ num = parse_num_blocks(argv[1], log_block_size);
+
+ printf("Parsed number: %lu\n", num);
+ exit(0);
+}
+#endif