instance method

IO::Buffer#each_byte

each_byte([offset, [count]]) {|byte| ...} → self

each_byte([offset, [count]]) → enumerator

static VALUE
io_buffer_each_byte(int argc, VALUE *argv, VALUE self)
{
    RETURN_ENUMERATOR_KW(self, argc, argv, RB_NO_KEYWORDS);

    const void *base;
    size_t size;

    rb_io_buffer_get_bytes_for_reading(self, &base, &size);

    size_t offset, count;
    io_buffer_extract_offset_count(RB_IO_BUFFER_DATA_TYPE_U8, size, argc, argv, &offset, &count);

    for (size_t i = 0; i < count; i++) {
        unsigned char *value = (unsigned char *)base + i + offset;
        rb_yield(RB_INT2FIX(*value));
    }

    return self;
}

Iterates over the buffer, yielding each byte starting from offset.

If count is given, only count bytes will be yielded.

Example

IO::Buffer.for("Hello World").each_byte(2, 2) do |offset, byte|
  puts "#{offset}: #{byte}"
end
# 2: 108
# 3: 108

See also #each #empty? #copy #external? also in 4.1 · 3.4 · 3.3 · 3.2

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