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Add krb5_storage_truncate

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git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@24226 ec53bebd-3082-4978-b11e-865c3cabbd6b
This commit is contained in:
Love Hörnquist Åstrand
2009-01-11 21:39:41 +00:00
parent c85a02340e
commit a54887f054
4 changed files with 52 additions and 0 deletions
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24
lib/krb5/store_emem.c
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@@ -104,6 +104,29 @@ emem_seek(krb5_storage *sp, off_t offset, int whence)
return s->ptr - s->base;
}
static int
emem_trunc(krb5_storage *sp, off_t offset)
{
emem_storage *s = (emem_storage*)sp->data;
/*
* If offset is larget then current size, or current size is
* shrunk more then half of the current size, adjust buffer.
*/
if (offset > s->size || s->size / 2 > offset ) {
void *base;
base = realloc(s->base, offset);
if(base == NULL)
return ENOMEM;
if (offset > s->size)
memset(s->len, 0, offset);
s->size = offset;
s->base = base;
}
s->len = offset;
return 0;
}
static void
emem_free(krb5_storage *sp)
{
@@ -142,6 +165,7 @@ krb5_storage_emem(void)
sp->fetch = emem_fetch;
sp->store = emem_store;
sp->seek = emem_seek;
sp->trunc = emem_trunc;
sp->free = emem_free;
return sp;
}