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author | Jeffrey Wilcke <geffobscura@gmail.com> | 2015-08-30 16:19:10 +0800 |
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committer | Jeffrey Wilcke <geffobscura@gmail.com> | 2015-10-04 07:13:54 +0800 |
commit | 361082ec4b942aea7c01fcb1be1782cb68b6fe3a (patch) | |
tree | d3ed9276cc61d314a6de14de1a61ea2c2d9a70b2 /core/vm/memory.go | |
parent | f7a71996fbbe9cea4445600ffa3c232a6cf42803 (diff) | |
download | dexon-361082ec4b942aea7c01fcb1be1782cb68b6fe3a.tar.gz dexon-361082ec4b942aea7c01fcb1be1782cb68b6fe3a.tar.zst dexon-361082ec4b942aea7c01fcb1be1782cb68b6fe3a.zip |
cmd/evm, core/vm, test: refactored VM and core
* Moved `vm.Transfer` to `core` package and changed execution to call
`env.Transfer` instead of `core.Transfer` directly.
* core/vm: byte code VM moved to jump table instead of switch
* Moved `vm.Transfer` to `core` package and changed execution to call
`env.Transfer` instead of `core.Transfer` directly.
* Byte code VM now shares the same code as the JITVM
* Renamed Context to Contract
* Changed initialiser of state transition & unexported methods
* Removed the Execution object and refactor `Call`, `CallCode` &
`Create` in to their own functions instead of being methods.
* Removed the hard dep on the state for the VM. The VM now
depends on a Database interface returned by the environment. In the
process the core now depends less on the statedb by usage of the env
* Moved `Log` from package `core/state` to package `core/vm`.
Diffstat (limited to 'core/vm/memory.go')
-rw-r--r-- | core/vm/memory.go | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/core/vm/memory.go b/core/vm/memory.go index 0109050d7..101ec75cb 100644 --- a/core/vm/memory.go +++ b/core/vm/memory.go @@ -18,6 +18,7 @@ package vm import "fmt" +// Memory implements ethereum RAM backed by a simple byte slice type Memory struct { store []byte } @@ -26,6 +27,7 @@ func NewMemory() *Memory { return &Memory{nil} } +// Set sets offset + size to value func (m *Memory) Set(offset, size uint64, value []byte) { // length of store may never be less than offset + size. // The store should be resized PRIOR to setting the memory @@ -40,12 +42,14 @@ func (m *Memory) Set(offset, size uint64, value []byte) { } } +// Resize resizes the memory to size func (m *Memory) Resize(size uint64) { if uint64(m.Len()) < size { m.store = append(m.store, make([]byte, size-uint64(m.Len()))...) } } +// Get returns offset + size as a new slice func (self *Memory) Get(offset, size int64) (cpy []byte) { if size == 0 { return nil @@ -61,6 +65,7 @@ func (self *Memory) Get(offset, size int64) (cpy []byte) { return } +// GetPtr returns the offset + size func (self *Memory) GetPtr(offset, size int64) []byte { if size == 0 { return nil @@ -73,10 +78,12 @@ func (self *Memory) GetPtr(offset, size int64) []byte { return nil } +// Len returns the length of the backing slice func (m *Memory) Len() int { return len(m.store) } +// Data returns the backing slice func (m *Memory) Data() []byte { return m.store } |