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Writing more universal functions so that they can work on multiple types

This commit is contained in:
saxon 2018-07-15 18:56:59 +09:30
parent abd5cc27de
commit 50c3f8c20a
1 changed files with 20 additions and 9 deletions
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29
rtmp/rtmp.go
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@ -472,6 +472,7 @@ func sendPacket(r *C.RTMP, pkt *C.RTMPPacket, queue int) int {
return 1 return 1
} }
/*
func writeN(r *C.RTMP, buffer unsafe.Pointer, n int) int { func writeN(r *C.RTMP, buffer unsafe.Pointer, n int) int {
ptr := buffer ptr := buffer
for n > 0 { for n > 0 {
@ -513,20 +514,30 @@ func writeN(r *C.RTMP, buffer unsafe.Pointer, n int) int {
return n == 0 return n == 0
} }
*/
/*
// TODO: port RTMP_METHOD
func AV_queue(vals **C.RTMP_METHOD, num *int, av *AVal, txn int ) {
var tmp unsafe.Pointer
if (*num & 0x0f) == 0 {
// TODO: work out what to do with the realloc
*vals = C.realloc(*vals, (*num+16) * C.int(int(unsafe.sizeof(RTMP_METHOD))))
}
tmp := C.malloc(av.av_len + 1 )
memmove(tmp, unsafe.Pointer(av.av_val), int(av.av_len))
indxPtr(tpm,av.av_len) = '\0'
}
*/
// memmove copies n bytes from "from" to "to". // memmove copies n bytes from "from" to "to".
//go:linkname memmove runtime.memmove //go:linkname memmove runtime.memmove
func memmove(to, from unsafe.Pointer, n uintptr) func memmove(to, from unsafe.Pointer, n uintptr)
// indxPytetr replicates C array indexing using an unsafe pointer for byte data func indxPtr(ptr unsafe.Pointer, indx, typeSize int) unsafe.Pointer {
func indxBytePtr(ptr unsafe.Pointer, indx int) *byte {
return (*byte)(incPtr(ptr,indx))
}
// indxPytetr replicates C array indexing using an unsafe pointer for int data
func indxIntPtr( ptr unsafe.Pointer, indx int ) *int {
return (*int)(incPtr(ptr,indx))
} }
// sliceToPtr get's the address of the first data element and returns as unsafe // sliceToPtr get's the address of the first data element and returns as unsafe
@ -547,12 +558,12 @@ func ptrToSlice(data unsafe.Pointer, size int) []byte {
} }
// incPtr attempts to replicate C like pointer arithmatic functionality // incPtr attempts to replicate C like pointer arithmatic functionality
func incPtr(ptr unsafe.Pointer, inc int) unsafe.Pointer { func incPtr(ptr unsafe.Pointer, inc, typeSize int) unsafe.Pointer {
return unsafe.Pointer(uintptr(ptr) + uintptr(inc)) return unsafe.Pointer(uintptr(ptr) + uintptr(inc))
} }
// incPtr attempts to replicate C like pointer arithmatic functionality // incPtr attempts to replicate C like pointer arithmatic functionality
func decPtr(ptr unsafe.Pointer, dec int) unsafe.Pointer { func decPtr(ptr unsafe.Pointer, dec, typeSize int) unsafe.Pointer {
return unsafe.Pointer(uintptr(ptr) - uintptr(inc)) return unsafe.Pointer(uintptr(ptr) - uintptr(inc))
} }