preconv_encode() can take a const input buffer;

diff from <christos at NetBSD>

1 files changed, 6 insertions, 6 deletions

diff --git a/preconv.c b/preconv.c
index 32132817..9a310198 100644
--- a/preconv.c
+++ b/preconv.c
@@ -26,14 +26,14 @@
 #include "libmandoc.h"
 
 int
-preconv_encode(struct buf *ib, size_t *ii, struct buf *ob, size_t *oi,
+preconv_encode(const struct buf *ib, size_t *ii, struct buf *ob, size_t *oi,
     int *filenc)
 {
-	unsigned char	*cu;
-	int		 nby;
-	unsigned int	 accum;
+	const unsigned char	*cu;
+	int			 nby;
+	unsigned int		 accum;
 
-	cu = (unsigned char *)ib->buf + *ii;
+	cu = (const unsigned char *)ib->buf + *ii;
 	assert(*cu & 0x80);
 
 	if ( ! (*filenc & MPARSE_UTF8))
@@ -90,7 +90,7 @@ preconv_encode(struct buf *ib, size_t *ii, struct buf *ob, size_t *oi,
 	assert(accum < 0xd800 || accum > 0xdfff);
 
 	*oi += snprintf(ob->buf + *oi, 11, "\\[u%.4X]", accum);
-	*ii = (char *)cu - ib->buf;
+	*ii = (const char *)cu - ib->buf;
 	*filenc &= ~MPARSE_LATIN1;
 	return 1;