X-Git-Url: https://git.stg.codes/stg.git/blobdiff_plain/46b0747592074017ff0ea4b33d4a7194235886e5..148f79dce19457e24754501db6844bc363c6f3fb:/libs/smux/per_encoder.c

diff --git a/libs/smux/per_encoder.c b/libs/smux/per_encoder.c
index 614dd233..47f3c916 100644
--- a/libs/smux/per_encoder.c
+++ b/libs/smux/per_encoder.c
@@ -2,41 +2,11 @@
 #include <asn_internal.h>
 #include <per_encoder.h>
 
-/* Flush partially filled buffer */
-static int _uper_encode_flush_outp(asn_per_outp_t *po);
+static asn_enc_rval_t uper_encode_internal(asn_TYPE_descriptor_t *td, asn_per_constraints_t *, void *sptr, asn_app_consume_bytes_f *cb, void *app_key);
 
 asn_enc_rval_t
 uper_encode(asn_TYPE_descriptor_t *td, void *sptr, asn_app_consume_bytes_f *cb, void *app_key) {
-	asn_per_outp_t po;
-	asn_enc_rval_t er;
-
-	/*
-	 * Invoke type-specific encoder.
-	 */
-	if(!td || !td->uper_encoder)
-		_ASN_ENCODE_FAILED;	/* PER is not compiled in */
-
-	po.buffer = po.tmpspace;
-	po.nboff = 0;
-	po.nbits = 8 * sizeof(po.tmpspace);
-	po.outper = cb;
-	po.op_key = app_key;
-	po.flushed_bytes = 0;
-
-	er = td->uper_encoder(td, 0, sptr, &po);
-	if(er.encoded != -1) {
-		size_t bits_to_flush;
-
-		bits_to_flush = ((po.buffer - po.tmpspace) << 3) + po.nboff;
-
-		/* Set number of bits encoded to a firm value */
-		er.encoded = (po.flushed_bytes << 3) + bits_to_flush;
-
-		if(_uper_encode_flush_outp(&po))
-			_ASN_ENCODE_FAILED;
-	}
-
-	return er;
+	return uper_encode_internal(td, 0, sptr, cb, app_key);
 }
 
 /*
@@ -63,20 +33,71 @@ asn_enc_rval_t
 uper_encode_to_buffer(asn_TYPE_descriptor_t *td, void *sptr, void *buffer, size_t buffer_size) {
 	enc_to_buf_arg key;
 
-	/*
-	 * Invoke type-specific encoder.
-	 */
-	if(!td || !td->uper_encoder)
-		_ASN_ENCODE_FAILED;	/* PER is not compiled in */
-
 	key.buffer = buffer;
 	key.left = buffer_size;
 
-	ASN_DEBUG("Encoding \"%s\" using UNALIGNED PER", td->name);
+	if(td) ASN_DEBUG("Encoding \"%s\" using UNALIGNED PER", td->name);
 
-	return uper_encode(td, sptr, encode_to_buffer_cb, &key);
+	return uper_encode_internal(td, 0, sptr, encode_to_buffer_cb, &key);
+}
+
+typedef struct enc_dyn_arg {
+	void *buffer;
+	size_t length;
+	size_t allocated;
+} enc_dyn_arg;
+static int
+encode_dyn_cb(const void *buffer, size_t size, void *key) {
+	enc_dyn_arg *arg = key;
+	if(arg->length + size >= arg->allocated) {
+		void *p;
+		arg->allocated = arg->allocated ? (arg->allocated << 2) : size;
+		p = REALLOC(arg->buffer, arg->allocated);
+		if(!p) {
+			FREEMEM(arg->buffer);
+			memset(arg, 0, sizeof(*arg));
+			return -1;
+		}
+		arg->buffer = p;
+	}
+	memcpy(((char *)arg->buffer) + arg->length, buffer, size);
+	arg->length += size;
+	return 0;
 }
+ssize_t
+uper_encode_to_new_buffer(asn_TYPE_descriptor_t *td, asn_per_constraints_t *constraints, void *sptr, void **buffer_r) {
+	asn_enc_rval_t er;
+	enc_dyn_arg key;
+
+	memset(&key, 0, sizeof(key));
+
+	er = uper_encode_internal(td, constraints, sptr, encode_dyn_cb, &key);
+	switch(er.encoded) {
+	case -1:
+		FREEMEM(key.buffer);
+		return -1;
+	case 0:
+		FREEMEM(key.buffer);
+		key.buffer = MALLOC(1);
+		if(key.buffer) {
+			*(char *)key.buffer = '\0';
+			*buffer_r = key.buffer;
+			return 1;
+		} else {
+			return -1;
+		}
+	default:
+		*buffer_r = key.buffer;
+		ASN_DEBUG("Complete encoded in %ld bits", (long)er.encoded);
+		return ((er.encoded + 7) >> 3);
+	}
+}
+
+/*
+ * Internally useful functions.
+ */
 
+/* Flush partially filled buffer */
 static int
 _uper_encode_flush_outp(asn_per_outp_t *po) {
 	uint8_t *buf;
@@ -93,3 +114,38 @@ _uper_encode_flush_outp(asn_per_outp_t *po) {
 
 	return po->outper(po->tmpspace, buf - po->tmpspace, po->op_key);
 }
+
+static asn_enc_rval_t
+uper_encode_internal(asn_TYPE_descriptor_t *td, asn_per_constraints_t *constraints, void *sptr, asn_app_consume_bytes_f *cb, void *app_key) {
+	asn_per_outp_t po;
+	asn_enc_rval_t er;
+
+	/*
+	 * Invoke type-specific encoder.
+	 */
+	if(!td || !td->uper_encoder)
+		ASN__ENCODE_FAILED;	/* PER is not compiled in */
+
+	po.buffer = po.tmpspace;
+	po.nboff = 0;
+	po.nbits = 8 * sizeof(po.tmpspace);
+	po.outper = cb;
+	po.op_key = app_key;
+	po.flushed_bytes = 0;
+
+	er = td->uper_encoder(td, constraints, sptr, &po);
+	if(er.encoded != -1) {
+		size_t bits_to_flush;
+
+		bits_to_flush = ((po.buffer - po.tmpspace) << 3) + po.nboff;
+
+		/* Set number of bits encoded to a firm value */
+		er.encoded = (po.flushed_bytes << 3) + bits_to_flush;
+
+		if(_uper_encode_flush_outp(&po))
+			ASN__ENCODE_FAILED;
+	}
+
+	return er;
+}
+