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tighten code according to tag invariant

This commit is contained in:
Lev Walkin 2012-09-04 17:11:27 -07:00
parent aed43c8bcc
commit 30520ab335
1 changed files with 23 additions and 11 deletions
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34
skeletons/asn_codecs_prim.c
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@ -143,20 +143,26 @@ struct xdp_arg_s {
int want_more;
};
/*
* Since some kinds of primitive values can be encoded using value-specific
* tags (<MINUS-INFINITY>, <enum-element>, etc), the primitive decoder must
* be supplied with such tags to parse them as needed.
*/
static int
xer_decode__unexpected_tag(void *key, const void *chunk_buf, size_t chunk_size) {
struct xdp_arg_s *arg = (struct xdp_arg_s *)key;
enum xer_pbd_rval bret;
if(arg->decoded_something) {
if(xer_is_whitespace(chunk_buf, chunk_size))
return 0; /* Skip it. */
/*
* Decoding was done once already. Prohibit doing it again.
*/
/*
* The chunk_buf is guaranteed to start at '<'.
*/
assert(chunk_size && ((const char *)chunk_buf)[0] == 0x3c);
/*
* Decoding was performed once already. Prohibit doing it again.
*/
if(arg->decoded_something)
return -1;
}
bret = arg->prim_body_decoder(arg->type_descriptor,
arg->struct_key, chunk_buf, chunk_size);
@ -177,13 +183,19 @@ xer_decode__unexpected_tag(void *key, const void *chunk_buf, size_t chunk_size)
}
static ssize_t
xer_decode__body(void *key, const void *chunk_buf, size_t chunk_size, int have_more) {
xer_decode__primitive_body(void *key, const void *chunk_buf, size_t chunk_size, int have_more) {
struct xdp_arg_s *arg = (struct xdp_arg_s *)key;
enum xer_pbd_rval bret;
if(arg->decoded_something) {
if(xer_is_whitespace(chunk_buf, chunk_size))
if(xer_is_whitespace(chunk_buf, chunk_size)) {
/*
* Example:
* "<INTEGER>123<!--/--> </INTEGER>"
* ^- chunk_buf position.
*/
return chunk_size;
}
/*
* Decoding was done once already. Prohibit doing it again.
*/
@ -253,7 +265,7 @@ xer_decode_primitive(asn_codec_ctx_t *opt_codec_ctx,
rc = xer_decode_general(opt_codec_ctx, &s_ctx, &s_arg,
xml_tag, buf_ptr, size,
xer_decode__unexpected_tag, xer_decode__body);
xer_decode__unexpected_tag, xer_decode__primitive_body);
switch(rc.code) {
case RC_OK:
if(!s_arg.decoded_something) {