Defer zstream NUL termination to end And don't terminate if there isn't space for it (since it's binary data, it's not worth a reallocation).
diff --git a/src/zstream.c b/src/zstream.c
index 82ae5e6..85fa2e0 100644
--- a/src/zstream.c
+++ b/src/zstream.c
@@ -134,7 +134,7 @@ int git_zstream_deflatebuf(git_buf *out, const void *in, size_t in_len)
while (!git_zstream_done(&zs)) {
size_t step = git_zstream_suggest_output_len(&zs), written;
- if ((error = git_buf_grow(out, out->asize + step + 1)) < 0)
+ if ((error = git_buf_grow(out, out->asize + step)) < 0)
goto done;
written = out->asize - out->size;
@@ -144,9 +144,12 @@ int git_zstream_deflatebuf(git_buf *out, const void *in, size_t in_len)
goto done;
out->size += written;
- out->ptr[out->size] = '\0';
}
+ /* NULL terminate for consistency if possible */
+ if (out->size < out->asize)
+ out->ptr[out->size] = '\0';
+
done:
git_zstream_free(&zs);
return error;