/* This function returns the name of the datum shift file which was/would be
used to convert the supplied point. */
Const char *CSsourceRgf93ToNtf (struct csRgf93ToNtf_* __This,Const double* llRgf93)
{
int status;
const char *cp;
struct csRgf93ToNtfEntry_* dtEntryPtr;
struct csRgf93ToNtfTxt_ *txtDatumPtr;
double lclLlNtf [3];
cp = NULL;
dtEntryPtr = CSselectRgf93ToNtf (__This,dtRgf93ToNtfTxt,llRgf93);
if (dtEntryPtr != NULL)
{
cp = CSsourceRgf93ToNtfEntry (dtEntryPtr,llRgf93);
txtDatumPtr = dtEntryPtr->pointers.txtDatumPtr;
status = CScalcRgf93ToNtfTxt (txtDatumPtr,lclLlNtf,llRgf93);
if (status == 0)
{
dtEntryPtr = CSselectRgf93ToNtf (__This,dtRgf93ToNtfC2,lclLlNtf);
if (dtEntryPtr != NULL)
{
cp = dtEntryPtr->pointers.c2DatumPtr->gridPtr->sourceId;
}
}
}
else if (__This->fallback != NULL)
{
cp = CSsourceFallback (__This->fallback);
}
return cp;
}
Const char *CSsourceAts77ToCsrs (struct csAts77ToCsrs_* __This,Const double ll_77 [2])
{
const char *cp;
struct csAts77ToCsrsEntry_* dtEntryPtr;
cp = NULL;
if (__This->cachePtr != NULL)
{
cp = CSsourceLLGridCellCache (__This->cachePtr,ll_77);
}
if (cp == NULL)
{
dtEntryPtr = CSselectAts77ToCsrs (__This,ll_77);
if (dtEntryPtr != NULL)
{
cp = CSsourceAts77ToCsrsEntry (dtEntryPtr,ll_77);
}
}
if (cp == NULL && __This->fallback != NULL)
{
cp = CSsourceFallback (__This->fallback);
}
return cp;
}
Const char *CSsourceEd50ToEtrf89 (struct csEd50ToEtrf89_* __This,Const double ll_50 [2])
{
const char *cp;
struct csEd50ToEtrf89Entry_* dtEntryPtr;
cp = NULL;
if (__This->cachePtr != NULL)
{
cp = CSsourceLLGridCellCache (__This->cachePtr,ll_50);
}
if (cp == NULL)
{
dtEntryPtr = CSselectEd50ToEtrf89 (__This,ll_50);
if (dtEntryPtr != NULL)
{
cp = CSsourceEd50ToEtrf89Entry (dtEntryPtr,ll_50);
}
}
if (cp == NULL && __This->fallback != NULL)
{
cp = CSsourceFallback (__This->fallback);
}
return cp;
}