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-rw-r--r--libkeccak_generalised_sum_fd.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/libkeccak_generalised_sum_fd.c b/libkeccak_generalised_sum_fd.c
index 7c4df54..879371b 100644
--- a/libkeccak_generalised_sum_fd.c
+++ b/libkeccak_generalised_sum_fd.c
@@ -19,16 +19,20 @@ libkeccak_generalised_sum_fd(int fd, struct libkeccak_state *restrict state, con
const char *restrict suffix, void *restrict hashsum)
{
ssize_t got;
+#ifndef _WIN32
struct stat attr;
+#endif
size_t blksize = 4096;
void *restrict chunk;
if (libkeccak_state_initialise(state, spec) < 0)
return -1;
+#ifndef _WIN32
if (fstat(fd, &attr) == 0)
if (attr.st_blksize > 0)
blksize = (size_t)attr.st_blksize;
+#endif
chunk = alloca(blksize);