This is similar to is_bundle, but checks an in-memory buffer
rather than a file. It also works on a partial buffer,
checking only the bundle signature. This means the result is
a three-way conditional: yes, no, or "we do not have enough
data yet".
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
bundle.c | 14 ++++++++++++++
bundle.h | 1 +
2 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/bundle.c b/bundle.c
index e48fe2f..6f911bc 100644
--- a/bundle.c
+++ b/bundle.c
@@ -122,6 +122,20 @@ int is_bundle(const char *path, int quiet)
return (fd >= 0);
}
+int is_bundle_buf(const char *s, int len)
+{
+ if (len > strlen(bundle_signature))
+ len = strlen(bundle_signature);
+ /* If we don't match what we already have, then definitely not. */
+ if (memcmp(s, bundle_signature, len))
+ return 0;
+ /* If we have enough bytes, we can say yes */
+ if (len == strlen(bundle_signature))
+ return 1;
+ /* otherwise, we can only say "maybe" */
+ return -1;
+}
+
static int list_refs(struct ref_list *r, int argc, const char **argv)
{
int i;
diff --git a/bundle.h b/bundle.h
index 675cc97..8bec44d 100644
--- a/bundle.h
+++ b/bundle.h
@@ -15,6 +15,7 @@ struct bundle_header {
};
int is_bundle(const char *path, int quiet);
+int is_bundle_buf(const char *s, int len);
int read_bundle_header(const char *path, struct bundle_header *header);
int create_bundle(struct bundle_header *header, const char *path,
int argc, const char **argv);
--
1.7.7.2.7.g9f96f
--
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