dedup

commit ec866bc6c38a907bd94f3954119217c36eac50f3
parent be0f2c397e37e4c59132931c4b3d522a9ed493ff
Author: sin <sin@2f30.org>
Date:   Thu, 25 Apr 2019 14:06:35 +0100

Implement srewind() to rewind the snapshot entry offset

Diffstat:
M
snap.c
 | 
10
++++++++++
M
snap.h
 | 
1
+

2 files changed, 11 insertions(+), 0 deletions(-)
diff --git a/snap.c b/snap.c
@@ -128,6 +128,7 @@ screat(char *path, int mode, struct sctx **sctx)
 		close(fd);
 		return -1;
 	}
+
 	SLIST_INIT(&(*sctx)->mdhead);
 	(*sctx)->mdnext = NULL;
 	(*sctx)->fd = fd;
@@ -203,6 +204,15 @@ sput(struct sctx *sctx, unsigned char *md)
 }
 
 int
+srewind(struct sctx *sctx)
+{
+	if (sctx == NULL)
+		return -1;
+	sctx->mdnext = NULL;
+	return 0;
+}
+
+int
 ssync(struct sctx *sctx)
 {
 	struct mdnode *mdnode;
diff --git a/snap.h b/snap.h
@@ -4,5 +4,6 @@ extern int screat(char *path, int mode, struct sctx **sctx);
 extern int sopen(char *path, int flags, int mode, struct sctx **sctx);
 extern int sget(struct sctx *sctx, unsigned char *md);
 extern int sput(struct sctx *sctx, unsigned char *md);
+extern int srewind(struct sctx *sctx);
 extern int ssync(struct sctx *sctx);
 extern int sclose(struct sctx *sctx);