instance method
IO::Buffer#xor!
source.xor!(mask) → io_buffer
io_buffer.c
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static VALUE
io_buffer_xor_inplace(VALUE self, VALUE mask)
{
struct rb_io_buffer *buffer = NULL;
TypedData_Get_Struct(self, struct rb_io_buffer, &rb_io_buffer_type, buffer);
struct rb_io_buffer *mask_buffer = NULL;
TypedData_Get_Struct(mask, struct rb_io_buffer, &rb_io_buffer_type, mask_buffer);
io_buffer_check_mask(mask_buffer);
io_buffer_check_overlaps(buffer, mask_buffer);
void *base;
size_t size;
io_buffer_get_bytes_for_writing(buffer, &base, &size);
memory_xor_inplace(base, size, mask_buffer->base, mask_buffer->size);
return self;
}
Modify the source buffer in place by applying the binary XOR operation to the source, using the mask, repeating as necessary.
Example
source = IO::Buffer.for("1234567890").dup # Make a read/write copy. # => # #<IO::Buffer 0x000056307a25b3e0+10 INTERNAL> # 0x00000000 31 32 33 34 35 36 37 38 39 30 1234567890 source.xor!(IO::Buffer.for("\xFF\x00\x00\xFF")) # => # #<IO::Buffer 0x000056307a25b3e0+10 INTERNAL> # 0x00000000 ce 32 33 cb ca 36 37 c7 c6 30 .23..67..0