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authorMiles Bader <miles@gnu.org>1996-09-23 16:57:27 +0000
committerMiles Bader <miles@gnu.org>1996-09-23 16:57:27 +0000
commit89511598743cc9bb3ca59916cb690e1734863089 (patch)
tree5d7962028caa4c613e4d6da8ff5cde576b176724
parent99b0295f2f50c00676eb4612691c755e0d252ead (diff)
(zero_open, zero_validate_name):
New functions. (zero_class): Use them. (store_zero_class): Renamed from zero_class; export.
-rw-r--r--libstore/zero.c41
1 files changed, 35 insertions, 6 deletions
diff --git a/libstore/zero.c b/libstore/zero.c
index 4706f418..c75675d1 100644
--- a/libstore/zero.c
+++ b/libstore/zero.c
@@ -93,7 +93,7 @@ zero_encode (const struct store *store, struct store_enc *enc)
}
error_t
-zero_decode (struct store_enc *enc, struct store_class *classes,
+zero_decode (struct store_enc *enc, const struct store_class *const *classes,
struct store **store)
{
off_t size;
@@ -109,21 +109,50 @@ zero_decode (struct store_enc *enc, struct store_class *classes,
return store_zero_create (size, flags, store);
}
+
+static error_t
+zero_open (const char *name, int flags,
+ const struct store_class *const *classes,
+ struct store **store)
+{
+ if (name)
+ {
+ char *end;
+ size_t size = strtoul (name, &end, 0);
+ if (end == name)
+ return EINVAL;
+ return store_zero_create (size, flags, store);
+ }
+ else
+ return store_zero_create (~(size_t)0, flags, store);
+}
+
+static error_t
+zero_validate_name (const char *name, const struct store_class *const *classes)
+{
+ if (name)
+ {
+ char *end;
+ strtoul (name, &end, 0);
+ return end == name ? EINVAL : 0;
+ }
+ else
+ return 0; /* `maximum size' */
+}
-static struct store_class
-zero_class =
+struct store_class
+store_zero_class =
{
STORAGE_ZERO, "zero", zero_read, zero_write,
zero_allocate_encoding, zero_encode, zero_decode,
- 0, 0, 0, 0, zero_remap
+ 0, 0, 0, 0, zero_remap, zero_open, zero_validate_name
};
-_STORE_STD_CLASS (zero_class);
/* Return a new zero store SIZE bytes long in STORE. */
error_t
store_zero_create (size_t size, int flags, struct store **store)
{
struct store_run run = { 0, size };
- *store = _make_store (&zero_class, MACH_PORT_NULL, flags, 1, &run, 1, 0);
+ *store = _make_store (&store_zero_class, MACH_PORT_NULL, flags, 1, &run, 1, 0);
return *store ? 0 : ENOMEM;
}