summaryrefslogtreecommitdiffstats
path: root/lib/e2p/hashstr.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/e2p/hashstr.c')
-rw-r--r--lib/e2p/hashstr.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/lib/e2p/hashstr.c b/lib/e2p/hashstr.c
new file mode 100644
index 0000000..a73758c
--- /dev/null
+++ b/lib/e2p/hashstr.c
@@ -0,0 +1,72 @@
+/*
+ * feature.c --- convert between features and strings
+ *
+ * Copyright (C) 1999 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+
+#include "e2p.h"
+
+struct hash {
+ int num;
+ const char *string;
+};
+
+static struct hash hash_list[] = {
+ { EXT2_HASH_LEGACY, "legacy" },
+ { EXT2_HASH_HALF_MD4, "half_md4" },
+ { EXT2_HASH_TEA, "tea" },
+ { 0, 0 },
+};
+
+const char *e2p_hash2string(int num)
+{
+ struct hash *p;
+ static char buf[20];
+
+ for (p = hash_list; p->string; p++) {
+ if (num == p->num)
+ return p->string;
+ }
+ sprintf(buf, "HASHALG_%d", num);
+ return buf;
+}
+
+/*
+ * Returns the hash algorithm, or -1 on error
+ */
+int e2p_string2hash(char *string)
+{
+ struct hash *p;
+ char *eptr;
+ int num;
+
+ for (p = hash_list; p->string; p++) {
+ if (!strcasecmp(string, p->string)) {
+ return p->num;
+ }
+ }
+ if (strncasecmp(string, "HASHALG_", 8))
+ return -1;
+
+ if (string[8] == 0)
+ return -1;
+ num = strtol(string+8, &eptr, 10);
+ if (num > 255 || num < 0)
+ return -1;
+ if (*eptr)
+ return -1;
+ return num;
+}
+