Merge remote-tracking branch 'github/master'

[stg.git] / libs / smux / per_encoder.c

diff --git a/libs/smux/per_encoder.c b/libs/smux/per_encoder.c
index 614dd23331d482a05b973f790449359e7f503768..86aec4ea56e48d5f8c8bb322ea58c1ffa90fd1fe 100644 (file)
--- a/libs/smux/per_encoder.c
+++ b/libs/smux/per_encoder.c
@@ -2,41 +2,49 @@
 #include <asn_internal.h>
 #include <per_encoder.h>
 
-/* Flush partially filled buffer */
 static int _uper_encode_flush_outp(asn_per_outp_t *po);
 
-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;
-       }
+static int
+ignore_output(const void *data, size_t size, void *app_key) {
+    (void)data;
+    (void)size;
+    (void)app_key;
+    return 0;
+}
 
-       return er;
+asn_enc_rval_t
+uper_encode(const asn_TYPE_descriptor_t *td,
+            const asn_per_constraints_t *constraints, const 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->op->uper_encoder)
+        ASN__ENCODE_FAILED;    /* PER is not compiled in */
+
+    po.buffer = po.tmpspace;
+    po.nboff = 0;
+    po.nbits = 8 * sizeof(po.tmpspace);
+    po.output = cb ? cb : ignore_output;
+    po.op_key = app_key;
+    po.flushed_bytes = 0;
+
+    er = td->op->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;
 }
 
 /*
@@ -60,23 +68,84 @@ static int encode_to_buffer_cb(const void *buffer, size_t size, void *key) {
 }
 
 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;
+uper_encode_to_buffer(const asn_TYPE_descriptor_t *td,
+                      const asn_per_constraints_t *constraints,
+                      const 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;
 
-       key.buffer = buffer;
-       key.left = buffer_size;
+    if(td) ASN_DEBUG("Encoding \"%s\" using UNALIGNED PER", td->name);
 
-       ASN_DEBUG("Encoding \"%s\" using UNALIGNED PER", td->name);
+    return uper_encode(td, constraints, sptr, encode_to_buffer_cb, &key);
+}
 
-       return uper_encode(td, 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) {
+        size_t new_size = arg->allocated ? arg->allocated : 8;
+        void *p;
+
+        do {
+            new_size <<= 2;
+        } while(arg->length + size >= new_size);
+
+        p = REALLOC(arg->buffer, new_size);
+        if(!p) {
+            FREEMEM(arg->buffer);
+            memset(arg, 0, sizeof(*arg));
+            return -1;
+        }
+        arg->buffer = p;
+        arg->allocated = new_size;
+    }
+    memcpy(((char *)arg->buffer) + arg->length, buffer, size);
+    arg->length += size;
+    return 0;
+}
+ssize_t
+uper_encode_to_new_buffer(const asn_TYPE_descriptor_t *td,
+                          const asn_per_constraints_t *constraints,
+                          const void *sptr, void **buffer_r) {
+    asn_enc_rval_t er;
+       enc_dyn_arg key;
+
+       memset(&key, 0, sizeof(key));
+
+       er = uper_encode(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;
@@ -91,5 +160,6 @@ _uper_encode_flush_outp(asn_per_outp_t *po) {
                buf++;
        }
 
-       return po->outper(po->tmpspace, buf - po->tmpspace, po->op_key);
+       return po->output(po->tmpspace, buf - po->tmpspace, po->op_key);
 }
+