1 files changed, 0 insertions, 51 deletions
diff --git a/src/shared/fsutil.c b/src/shared/fsutil.c
deleted file mode 100644
index 05ca44a..0000000
--- a/src/shared/fsutil.c
+++ /dev/null
@@ -1,51 +0,0 @@
-#include <assert.h>
-#include <camellia/fsutil.h>
-#include <limits.h>
-
-void fs_normslice(long *restrict offset, size_t *restrict length, size_t max, bool expand)
-{
-	assert(max <= (size_t)LONG_MAX);
-
-	if (*offset < 0) {
-		/* Negative offsets are relative to EOF + 1.
-		 * Thus:
-		 *   write(-1) writes right after the file ends; atomic append
-		 *   write(-n) writes, overriding the last (n-1) bytes
-		 *   read(-n)  reads the last (n-1) bytes
-		 */
-		*offset += max + 1;
-		if (*offset < 0) {
-			/* cursor went before the file, EOF */
-			*length = 0;
-			*offset = max;
-			goto end;
-		}
-	}
-
-	if (expand) {
-		/* This is a write() to a file with a dynamic size.
-		 * We don't care if it goes past the current size, because the
-		 * driver can handle expanding it. */
-	} else {
-		/* This operation can't extend the file, it's either:
-		 *  - any read()
-		 *  - a write() to a file with a static size (e.g. a framebuffer)
-		 * *offset and *length describe a slice of a buffer with length max,
-		 * so their sum must not overflow it. */
-		if ((size_t)*offset <= max) {
-			size_t maxlen = max - (size_t)*offset;
-			if (*length > maxlen)
-				*length = maxlen;
-		} else {
-			/* regular EOF */
-			*length = 0;
-			*offset = max;
-			goto end;
-		}
-	}
-
-end:
-	assert(0 <= *offset);
-	if (!expand)
-		assert(*offset + *length <= max);
-}