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-rw-r--r--libwc/ucs.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/libwc/ucs.c b/libwc/ucs.c
index 5d110f3..4fe020d 100644
--- a/libwc/ucs.c
+++ b/libwc/ucs.c
@@ -29,6 +29,7 @@
#include "map/ucs_isupper.map"
#include "map/ucs_case.map"
+#define MAX_TAG_LEN (8 + 1 + 8)
#define MAX_TAG_MAP 0x100
static int n_tag_map = 0;
static char *tag_map[ MAX_TAG_MAP ];
@@ -701,11 +702,12 @@ wtf_push_ucs(Str os, wc_uint32 ucs, wc_status *st)
if (! WcOption.use_language_tag)
return;
if (ucs == WC_C_LANGUAGE_TAG)
- st->tag = Strnew_size(4);
+ st->tag = Strnew_size(MAX_TAG_LEN);
else if (ucs == WC_C_CANCEL_TAG) {
st->tag = NULL;
st->ntag = 0;
- } else if (st->tag && ucs >= WC_C_TAG_SPACE)
+ } else if (st->tag && st->tag->length < MAX_TAG_LEN &&
+ ucs >= WC_C_TAG_SPACE)
Strcat_char(st->tag, (char)(ucs & 0x7f));
return;
}