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codeparrot

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#ifndef NDEBUG
static bool leftsideismergeable(Exonnode *nodeA, Exonnode *nodeB)
{
switch (getleftsidestatus(nodeA, nodeB))
{
case MERGEABLE_LEFTSIDE_A_BEFORE_B:
case MERGEABLE_LEFTSIDE_A_EQUALS_B:
case MERGEABLE_LEFTSIDE_A_AFTER_B:
return true;
case NON_MERGEABLE_LEFTSIDE:
return false;
default:
gt_assert(0);
return false;
}
}
#endif
static Rightsidestatus getrightsidestatus(Exonnode *nodeA, Exonnode *nodeB)
{
/* ...-----[
...------- */
if (nodeA->range.end < nodeB->range.end && nodeA->rightmergeable)
return MERGEABLE_RIGHTSIDE_A_BEFORE_B;
/* ...-------
...------- */
if (nodeA->range.end == nodeB->range.end)
return MERGEABLE_RIGHTSIDE_A_EQUALS_B;
/* ...-------
...-----[ */
if (nodeA->range.end > nodeB->range.end && nodeB->rightmergeable)
return MERGEABLE_RIGHTSIDE_A_AFTER_B;
return NON_MERGEABLE_RIGHTSIDE;
}
#ifndef NDEBUG
static bool rightsideismergeable(Exonnode *nodeA, Exonnode *nodeB)
{
switch (getrightsidestatus(nodeA, nodeB)) {
case MERGEABLE_RIGHTSIDE_A_BEFORE_B:
case MERGEABLE_RIGHTSIDE_A_EQUALS_B:
case MERGEABLE_RIGHTSIDE_A_AFTER_B:
return true;
case NON_MERGEABLE_RIGHTSIDE:
return false;
default:
gt_assert(0);
return false;
}
}
#endif
#ifndef NDEBUG
static bool nodesaremergeable(Exonnode *nodeA, Exonnode *nodeB)
{
if (gt_range_overlap(&nodeA->range, &nodeB->range) &&
leftsideismergeable(nodeA, nodeB) &&
rightsideismergeable(nodeA, nodeB)) {
return true;
}
return false;
}
#endif
static void mergeleftside(Exonnode *nodeA, Exonnode *nodeB)
{
switch (getleftsidestatus(nodeA, nodeB)) {
case MERGEABLE_LEFTSIDE_A_BEFORE_B:
/* -------...
]-----...
nothing to do */
break;
case MERGEABLE_LEFTSIDE_A_EQUALS_B:
/* -------...
-------... */
if (!nodeA->leftmergeable || !nodeB->leftmergeable)
nodeA->leftmergeable = false;
break;
case MERGEABLE_LEFTSIDE_A_AFTER_B:
/* ]-----...
-------... */
nodeA->range.start = nodeB->range.start;
nodeA->leftmergeable = nodeB->leftmergeable;
break;
case NON_MERGEABLE_LEFTSIDE:
default: gt_assert(0);
}
}
static void mergerightside(Exonnode *nodeA, Exonnode *nodeB)
{
switch (getrightsidestatus(nodeA, nodeB)) {
case MERGEABLE_RIGHTSIDE_A_BEFORE_B:
/* ...-----[
...------- */
nodeA->range.end = nodeB->range.end;