+/*
+ * Copyright (c) 2017 Lev Walkin <vlm@lionet.info>.
+ * All rights reserved.
+ * Redistribution and modifications are permitted subject to BSD license.
+ */
+#include <asn_internal.h>
+#include <BIT_STRING.h>
+
+/*
+ * BIT STRING specific contents printer.
+ */
+int
+BIT_STRING_print(const asn_TYPE_descriptor_t *td, const void *sptr, int ilevel,
+ asn_app_consume_bytes_f *cb, void *app_key) {
+ const char * const h2c = "0123456789ABCDEF";
+ char scratch[64];
+ const BIT_STRING_t *st = (const BIT_STRING_t *)sptr;
+ uint8_t *buf;
+ uint8_t *end;
+ char *p = scratch;
+
+ (void)td; /* Unused argument */
+
+ if(!st || !st->buf)
+ return (cb("<absent>", 8, app_key) < 0) ? -1 : 0;
+
+ ilevel++;
+ buf = st->buf;
+ end = buf + st->size;
+
+ /*
+ * Hexadecimal dump.
+ */
+ for(; buf < end; buf++) {
+ if((buf - st->buf) % 16 == 0 && (st->size > 16)
+ && buf != st->buf) {
+ _i_INDENT(1);
+ /* Dump the string */
+ if(cb(scratch, p - scratch, app_key) < 0) return -1;
+ p = scratch;
+ }
+ *p++ = h2c[*buf >> 4];
+ *p++ = h2c[*buf & 0x0F];
+ *p++ = 0x20;
+ }
+
+ if(p > scratch) {
+ p--; /* Eat the tailing space */
+
+ if((st->size > 16)) {
+ _i_INDENT(1);
+ }
+
+ /* Dump the incomplete 16-bytes row */
+ if(cb(scratch, p - scratch, app_key) < 0)
+ return -1;
+ }
+
+ if(st->bits_unused) {
+ int ret = snprintf(scratch, sizeof(scratch), " (%d bit%s unused)",
+ st->bits_unused, st->bits_unused == 1 ? "" : "s");
+ assert(ret > 0 && ret < (ssize_t)sizeof(scratch));
+ if(ret > 0 && ret < (ssize_t)sizeof(scratch)
+ && cb(scratch, ret, app_key) < 0)
+ return -1;
+ }
+
+ return 0;
+}