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Diffstat (limited to 'csum-file.c')
-rw-r--r--csum-file.c14
1 files changed, 14 insertions, 0 deletions
diff --git a/csum-file.c b/csum-file.c
index b7174c6c05..7c806ada48 100644
--- a/csum-file.c
+++ b/csum-file.c
@@ -49,6 +49,8 @@ int sha1close(struct sha1file *f, unsigned char *result, int update)
int sha1write(struct sha1file *f, void *buf, unsigned int count)
{
+ if (f->do_crc)
+ f->crc32 = crc32(f->crc32, buf, count);
while (count) {
unsigned offset = f->offset;
unsigned left = sizeof(f->buffer) - offset;
@@ -91,6 +93,7 @@ struct sha1file *sha1create(const char *fmt, ...)
f->fd = fd;
f->error = 0;
f->offset = 0;
+ f->do_crc = 0;
SHA1_Init(&f->ctx);
return f;
}
@@ -111,6 +114,7 @@ struct sha1file *sha1fd(int fd, const char *name)
f->fd = fd;
f->error = 0;
f->offset = 0;
+ f->do_crc = 0;
SHA1_Init(&f->ctx);
return f;
}
@@ -143,4 +147,14 @@ int sha1write_compressed(struct sha1file *f, void *in, unsigned int size)
return size;
}
+void crc32_begin(struct sha1file *f)
+{
+ f->crc32 = crc32(0, Z_NULL, 0);
+ f->do_crc = 1;
+}
+uint32_t crc32_end(struct sha1file *f)
+{
+ f->do_crc = 0;
+ return f->crc32;
+}