cache-tree: mark istate->cache_changed on prime_cache_tree()

diff --git a/csum-file.c b/csum-file.c
index fc97d6e04528b5c5b55fc211a462f3cb828f3d49..b00b215031174a0f8ee3cd3d51c662d3cacc6b00 100644 (file)
--- a/csum-file.c
+++ b/csum-file.c
@@ -11,7 +11,7 @@
 #include "progress.h"
 #include "csum-file.h"
 
-static void flush(struct sha1file *f, void *buf, unsigned int count)
+static void flush(struct sha1file *f, const void *buf, unsigned int count)
 {
        if (0 <= f->check_fd && count)  {
                unsigned char check_buffer[8192];
@@ -86,13 +86,13 @@ int sha1close(struct sha1file *f, unsigned char *result, unsigned int flags)
        return fd;
 }
 
-int sha1write(struct sha1file *f, void *buf, unsigned int count)
+void sha1write(struct sha1file *f, const void *buf, unsigned int count)
 {
        while (count) {
                unsigned offset = f->offset;
                unsigned left = sizeof(f->buffer) - offset;
                unsigned nr = count > left ? left : count;
-               void *data;
+               const void *data;
 
                if (f->do_crc)
                        f->crc32 = crc32(f->crc32, buf, nr);
@@ -116,7 +116,6 @@ int sha1write(struct sha1file *f, void *buf, unsigned int count)
                }
                f->offset = offset;
        }
-       return 0;
 }
 
 struct sha1file *sha1fd(int fd, const char *name)
@@ -158,6 +157,26 @@ struct sha1file *sha1fd_throughput(int fd, const char *name, struct progress *tp
        return f;
 }
 
+void sha1file_checkpoint(struct sha1file *f, struct sha1file_checkpoint *checkpoint)
+{
+       sha1flush(f);
+       checkpoint->offset = f->total;
+       checkpoint->ctx = f->ctx;
+}
+
+int sha1file_truncate(struct sha1file *f, struct sha1file_checkpoint *checkpoint)
+{
+       off_t offset = checkpoint->offset;
+
+       if (ftruncate(f->fd, offset) ||
+           lseek(f->fd, offset, SEEK_SET) != offset)
+               return -1;
+       f->total = offset;
+       f->ctx = checkpoint->ctx;
+       f->offset = 0; /* sha1flush() was called in checkpoint */
+       return 0;
+}
+
 void crc32_begin(struct sha1file *f)
 {
        f->crc32 = crc32(0, NULL, 0);