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#
# This file is part of ruby-ffi.
# For licensing, see LICENSE.SPECS
#
require File.expand_path(File.join(File.dirname(__FILE__), "spec_helper"))
MemoryPointer = FFI::MemoryPointer
describe "MemoryPointer#total" do
it "MemoryPointer.new(:char, 1).total == 1" do
expect(MemoryPointer.new(:char, 1).total).to eq 1
end
it "MemoryPointer.new(:short, 1).total == 2" do
expect(MemoryPointer.new(:short, 1).total).to eq 2
end
it "MemoryPointer.new(:int, 1).total == 4" do
expect(MemoryPointer.new(:int, 1).total).to eq 4
end
it "MemoryPointer.new(:long_long, 1).total == 8" do
expect(MemoryPointer.new(:long_long, 1).total).to eq 8
end
it "MemoryPointer.new(1024).total == 1024" do
expect(MemoryPointer.new(1024).total).to eq 1024
end
end
describe "MemoryPointer#clear" do
it "should clear the memory" do
ptr = MemoryPointer.new(:long)
ptr.write_long 1234
expect(ptr.read_long).to eq(1234)
ptr.clear
expect(ptr.read_long).to eq(0)
end
it "should deny changes when frozen" do
skip "not yet supported on TruffleRuby" if RUBY_ENGINE == "truffleruby"
skip "not yet supported on JRuby" if RUBY_ENGINE == "jruby"
ptr = MemoryPointer.new(:long).freeze
expect{ ptr.clear }.to raise_error(RuntimeError, /memory write/)
end
end
describe "MemoryPointer#read_array_of_long" do
it "foo" do
ptr = MemoryPointer.new(:long, 1024)
ptr[0].write_long 1234
ptr[1].write_long 5678
l = ptr.read_array_of_long(2)
expect(l[0]).to eq 1234
expect(l[1]).to eq 5678
end
end
describe "MemoryPointer argument" do
module Ptr
extend FFI::Library
ffi_lib FFI::Platform::LIBC
attach_function :memset, [ :pointer, :int, :ulong ], :pointer
attach_function :memcpy, [ :pointer, :pointer, :ulong ], :pointer
end
it "Pointer passed correctly" do
p = MemoryPointer.new :int, 1
ret = Ptr.memset(p, 0, p.total)
expect(ret).to eq p
end
it "Data passed to native function" do
p = MemoryPointer.new :int, 1
p2 = MemoryPointer.new :int, 1
p2.put_int(0, 0x5eadbeef)
Ptr.memcpy(p, p2, p.total)
expect(p.get_int(0)).to eq p2.get_int(0)
expect(p2.get_int(0)).not_to eql 0
end
end
describe "MemoryPointer return value" do
module Stdio
extend FFI::Library
ffi_lib FFI::Platform::LIBC
attach_function :fopen, [ :string, :string ], :pointer
attach_function :fclose, [ :pointer ], :int
attach_function :fwrite, [ :pointer, :ulong, :ulong, :string ], :ulong
end
it "fopen returns non-nil" do
fp = Stdio.fopen("/dev/null", "w")
expect(fp).to_not be_nil
expect(Stdio.fclose(fp)).to eq 0 unless fp.nil? or fp.null?
end
end
describe "#autorelease" do
it "should be true by default" do
expect(MemoryPointer.new(8).autorelease?).to be true
end
it "should return false when autorelease=(false)" do
ptr = MemoryPointer.new(8)
ptr.autorelease = false
expect(ptr.autorelease?).to be false
ptr.free
end
it "should deny changes when frozen" do
skip "not yet supported on TruffleRuby" if RUBY_ENGINE == "truffleruby"
skip "not yet supported on JRuby" if RUBY_ENGINE == "jruby"
ptr = MemoryPointer.new(8).freeze
expect{ ptr.autorelease = false }.to raise_error(FrozenError)
end
end
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