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gisi: Add constructor for sub-iterators 

This is needed for decoding messages that include sub-blocks within
sub-blocks.
This commit is contained in:
Aki Niemi 2010-11-23 16:09:37 +02:00
parent 188bbc5d3b
commit ca3f646f8f
2 changed files with 36 additions and 0 deletions
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31
gisi/iter.c
View File

@ -76,6 +76,37 @@ void g_isi_sb_iter_init(GIsiSubBlockIter *iter, const GIsiMessage *msg,
iter->sub_blocks = len > used ? iter->start[-1] : 0;
}
void g_isi_sb_subiter_init(GIsiSubBlockIter *outer, GIsiSubBlockIter *inner,
size_t used)
{
size_t len = g_isi_sb_iter_get_len(outer);
if (outer->start + len > outer->end ||
outer->start + used > outer->end)
len = used = 0;
inner->start = outer->start + used;
inner->end = inner->start + len;
inner->longhdr = FALSE;
inner->sub_blocks = len > used ? inner->start[-1] : 0;
}
void g_isi_sb_subiter_init_full(GIsiSubBlockIter *outer, GIsiSubBlockIter *inner,
size_t used, gboolean longhdr,
uint16_t sub_blocks)
{
size_t len = g_isi_sb_iter_get_len(outer);
if (outer->start + len > outer->end ||
outer->start + used > outer->end)
len = used = 0;
inner->start = outer->start + used;
inner->end = inner->start + len;
inner->longhdr = longhdr;
inner->sub_blocks = len > used ? sub_blocks : 0;
}
gboolean g_isi_sb_iter_is_valid(const GIsiSubBlockIter *iter)
{
if (iter == NULL)

5
gisi/iter.h
View File

@ -43,6 +43,11 @@ void g_isi_sb_iter_init(GIsiSubBlockIter *iter, const GIsiMessage *msg,
void g_isi_sb_iter_init_full(GIsiSubBlockIter *iter, const GIsiMessage *msg,
size_t used, gboolean longhdr,
uint16_t sub_blocks);
void g_isi_sb_subiter_init(GIsiSubBlockIter *outer, GIsiSubBlockIter *inner,
size_t used);
void g_isi_sb_subiter_init_full(GIsiSubBlockIter *outer, GIsiSubBlockIter *inner,
size_t used, gboolean longhdr,
uint16_t sub_blocks);
gboolean g_isi_sb_iter_is_valid(const GIsiSubBlockIter *iter);
gboolean g_isi_sb_iter_next(GIsiSubBlockIter *iter);