func check_level1_func(ind *linalg.IndexOpts, fn funcNum, X, Y matrix.Matrix) error {
nX, nY := 0, 0
// this is adapted from cvxopt:blas.c python blas interface
switch fn {
case fnrm2, fasum, fiamax, fscal, fset:
if ind.IncX <= 0 {
return onError("incX illegal, <=0")
}
if ind.OffsetX < 0 {
return onError("offsetX illegal, <0")
}
sizeX := X.NumElements()
if sizeX >= ind.OffsetX+1 {
// calculate default size for N based on X size
nX = 1 + (sizeX-ind.OffsetX-1)/ind.IncX
}
if sizeX < ind.OffsetX+1+(ind.Nx-1)*abs(ind.IncX) {
return onError("X size error")
}
if ind.Nx < 0 {
ind.Nx = nX
}
case fdot, fswap, fcopy, faxpy, faxpby:
// vector X
if ind.IncX <= 0 {
return onError("incX illegal, <=0")
}
if ind.OffsetX < 0 {
return onError("offsetX illegal, <0")
}
sizeX := X.NumElements()
if sizeX >= ind.OffsetX+1 {
// calculate default size for N based on X size
nX = 1 + (sizeX-ind.OffsetX-1)/ind.IncX
}
if sizeX < ind.OffsetX+1+(ind.Nx-1)*abs(ind.IncX) {
return onError("X size error")
}
if ind.Nx < 0 {
ind.Nx = nX
}
// vector Y
if ind.IncY <= 0 {
return onError("incY illegal, <=0")
}
if ind.OffsetY < 0 {
return onError("offsetY illegal, <0")
}
sizeY := Y.NumElements()
if sizeY >= ind.OffsetY+1 {
// calculate default size for N based on Y size
nY = 1 + (sizeY-ind.OffsetY-1)/ind.IncY
}
if ind.Ny < 0 {
ind.Ny = nY
}
if sizeY < ind.OffsetY+1+(ind.Ny-1)*abs(ind.IncY) {
//fmt.Printf("sizeY=%d, inds: %#v\n", sizeY, ind)
return onError("Y size error")
}
case frotg, frotmg, frot, frotm:
}
return nil
}