IterExtensions15C

Removing a TRE without using an iterator:

if ( nitf_Extensions_exists( ext, TRE_NAME ) )
{
    nitf_Extensions_removeTREsByName(ext, TRE_NAME);
}

Walking through an Extensions segment and removing (and re-inserting a TRE)

extIter = nitf_Extensions_begin(ext);
endIter = nitf_Extensions_end(ext);

while (nitf_ExtensionsIterator_notEqualTo(&extIter, &endIter) )
{
    nitf_TRE* tre = nitf_ExtensionsIterator_get(&extIter);
    if ( strcmp( tre->tag, TRE_NAME) == 0 )
    {
         if ( (tre = nitf_Extensions_remove(ext, &extIter, &lerror)) == NULL)
         {
              nitf_Error_print(&lerror, stdout, "Couldnt blow away %s!\n", tre->tag);
              goto CATCH_ERROR;
         }

         if (! nitf_Extensions_insert(ext, &extIter, tre, &lerror) )
         {
              nitf_Error_print(&lerror, stdout, "Couldnt insert %s\n", tre->tag);
              goto CATCH_ERROR;  
             
         }

    }
               
    nitf_ExtensionsIterator_increment(&extIter);
}