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@nobuoka
Created April 12, 2012 17:45
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diff --git a/ext/stringio/stringio.c b/ext/stringio/stringio.c
index 54d36c9..cab9d92 100644
--- a/ext/stringio/stringio.c
+++ b/ext/stringio/stringio.c
@@ -1209,7 +1209,7 @@ strio_putc(VALUE self, VALUE ch)
/*
* call-seq:
- * strio.read([length [, buffer]]) -> string, buffer, or nil
+ * strio.read([length [, outbuf]]) -> string, outbuf, or nil
*
* See IO#read.
*/
diff --git a/io.c b/io.c
index f0c8515..120d8ce 100644
--- a/io.c
+++ b/io.c
@@ -2281,6 +2281,8 @@ io_getpartial(int argc, VALUE *argv, VALUE io, int nonblock)
* It doesn't block if some data available.
* If the optional <i>outbuf</i> argument is present,
* it must reference a String, which will receive the data.
+ * The <i>outbuf</i> is to contain only the received data after the method call
+ * even though it is not empty at the beginning.
* It raises <code>EOFError</code> on end of file.
*
* readpartial is designed for streams such as pipe, socket, tty, etc.
@@ -2351,6 +2353,8 @@ io_readpartial(int argc, VALUE *argv, VALUE io)
*
* If the optional <i>outbuf</i> argument is present,
* it must reference a String, which will receive the data.
+ * The <i>outbuf</i> is to contain only the received data after the method call
+ * even though it is not empty at the beginning.
*
* read_nonblock just calls the read(2) system call.
* It causes all errors the read(2) system call causes: Errno::EWOULDBLOCK, Errno::EINTR, etc.
@@ -2485,7 +2489,7 @@ rb_io_write_nonblock(VALUE io, VALUE str)
/*
* call-seq:
- * ios.read([length [, buffer]]) -> string, buffer, or nil
+ * ios.read([length [, outbuf]]) -> string, outbuf, or nil
*
* Reads <i>length</i> bytes from the I/O stream.
*
@@ -2505,8 +2509,10 @@ rb_io_write_nonblock(VALUE io, VALUE str)
*
* If <i>length</i> is zero, it returns <code>""</code>.
*
- * If the optional <i>buffer</i> argument is present, it must reference
+ * If the optional <i>outbuf</i> argument is present, it must reference
* a String, which will receive the data.
+ * The <i>outbuf</i> is to contain only the received data after the method call
+ * even though it is not empty at the beginning.
*
* At end of file, it returns <code>nil</code> or <code>""</code>
* depend on <i>length</i>.
@@ -4284,6 +4290,8 @@ rb_io_syswrite(VALUE io, VALUE str)
* that read from <em>ios</em> or you may get unpredictable results.
* If the optional <i>outbuf</i> argument is present, it must reference
* a String, which will receive the data.
+ * The <i>outbuf</i> is to contain only the received data after the method call
+ * even though it is not empty at the beginning.
* Raises <code>SystemCallError</code> on error and
* <code>EOFError</code> at end of file.
*
@@ -10335,7 +10343,7 @@ argf_eof(VALUE argf)
/*
* call-seq:
- * ARGF.read([length [, buffer]]) -> string, buffer, or nil
+ * ARGF.read([length [, outbuf]]) -> string, outbuf, or nil
*
* Reads _length_ bytes from ARGF. The files named on the command line
* are concatenated and treated as a single file by this method, so when
@@ -10352,8 +10360,10 @@ argf_eof(VALUE argf)
*
* If _length_ is zero, it returns _""_.
*
- * If the optional _buffer_ argument is present, it must reference a String,
+ * If the optional _outbuf_ argument is present, it must reference a String,
* which will receive the data.
+ * The _outbuf_ is to contain only the received data after the method call
+ * even though it is not empty at the beginning.
*
* For example:
*
@@ -10439,7 +10449,10 @@ static VALUE argf_getpartial(int argc, VALUE *argv, VALUE argf, int nonblock);
* Reads at most _maxlen_ bytes from the ARGF stream. It blocks only if
* +ARGF+ has no data immediately available. If the optional _outbuf_
* argument is present, it must reference a String, which will receive the
- * data. It raises <code>EOFError</code> on end of file.
+ * data.
+ * The _outbuf_ is to contain only the received data after the method call
+ * even though it is not empty at the beginning.
+ * It raises <code>EOFError</code> on end of file.
*
* +readpartial+ is designed for streams such as pipes, sockets, and ttys. It
* blocks only when no data is immediately available. This means that it
diff --git a/test/ruby/test_argf.rb b/test/ruby/test_argf.rb
index 2f1ddf5..284f342 100644
--- a/test/ruby/test_argf.rb
+++ b/test/ruby/test_argf.rb
@@ -446,6 +446,16 @@ class TestArgf < Test::Unit::TestCase
end
end
+ def test_read2_with_not_empty_buffer
+ ruby('-e', <<-SRC, @t1.path, @t2.path, @t3.path) do |f|
+ s = "0123456789"
+ ARGF.read(8, s)
+ p s
+ SRC
+ assert_equal("\"1\\n2\\n3\\n4\\n\"\n", f.read)
+ end
+ end
+
def test_read3
ruby('-e', <<-SRC, @t1.path, @t2.path, @t3.path) do |f|
nil while ARGF.gets
@@ -463,6 +473,8 @@ class TestArgf < Test::Unit::TestCase
loop do
s << ARGF.readpartial(1)
t = ""; ARGF.readpartial(1, t); s << t
+ # not empty buffer
+ u = "abcdef"; ARGF.readpartial(1, u); s << u
end
rescue EOFError
puts s
diff --git a/test/ruby/test_io.rb b/test/ruby/test_io.rb
index 0f4d523..d984252 100644
--- a/test/ruby/test_io.rb
+++ b/test/ruby/test_io.rb
@@ -991,6 +991,16 @@ class TestIO < Test::Unit::TestCase
}
end
+ def test_readpartial_with_not_empty_buffer
+ pipe(proc do |w|
+ w.write "foob"
+ w.close
+ end, proc do |r|
+ r.readpartial(5, s = "01234567")
+ assert_equal("foob", s)
+ end)
+ end
+
def test_readpartial_buffer_error
with_pipe do |r, w|
s = ""
@@ -1026,6 +1036,16 @@ class TestIO < Test::Unit::TestCase
end
end
+ def test_read_with_not_empty_buffer
+ pipe(proc do |w|
+ w.write "foob"
+ w.close
+ end, proc do |r|
+ r.read(nil, s = "01234567")
+ assert_equal("foob", s)
+ end)
+ end
+
def test_read_buffer_error
with_pipe do |r, w|
s = ""
@@ -1047,6 +1067,17 @@ class TestIO < Test::Unit::TestCase
end)
end
+ def test_read_nonblock_with_not_empty_buffer
+ skip "IO#read_nonblock is not supported on file/pipe." if /mswin|bccwin|mingw/ =~ RUBY_PLATFORM
+ pipe(proc do |w|
+ w.write "foob"
+ w.close
+ end, proc do |r|
+ r.read_nonblock(5, s = "01234567")
+ assert_equal("foob", s)
+ end)
+ end
+
def test_read_nonblock_error
return if !have_nonblock?
skip "IO#read_nonblock is not supported on file/pipe." if /mswin|bccwin|mingw/ =~ RUBY_PLATFORM
@@ -1417,6 +1448,16 @@ class TestIO < Test::Unit::TestCase
end
end
+ def test_sysread_with_not_empty_buffer
+ pipe(proc do |w|
+ w.write "foob"
+ w.close
+ end, proc do |r|
+ r.sysread( 5, s = "01234567" )
+ assert_equal( "foob", s )
+ end)
+ end
+
def test_flag
t = make_tempfile
diff --git a/test/stringio/test_stringio.rb b/test/stringio/test_stringio.rb
index 26fcc62..22cba38 100644
--- a/test/stringio/test_stringio.rb
+++ b/test/stringio/test_stringio.rb
@@ -426,6 +426,11 @@ class TestStringIO < Test::Unit::TestCase
s = ""
f.read(nil, s)
assert_equal("\u3042\u3044", s, bug5207)
+ f.rewind
+ # not empty buffer
+ s = "0123456789"
+ f.read(nil, s)
+ assert_equal("\u3042\u3044", s)
end
def test_readpartial
@@ -435,6 +440,10 @@ class TestStringIO < Test::Unit::TestCase
assert_equal("\u3042\u3044", f.readpartial)
f.rewind
assert_equal("\u3042\u3044".force_encoding(Encoding::ASCII_8BIT), f.readpartial(f.size))
+ f.rewind
+ # not empty buffer
+ s = '0123456789'
+ assert_equal("\u3042\u3044".force_encoding(Encoding::ASCII_8BIT), f.readpartial(f.size, s))
end
def test_read_nonblock
@@ -444,6 +453,10 @@ class TestStringIO < Test::Unit::TestCase
assert_equal("\u3042\u3044", f.read_nonblock)
f.rewind
assert_equal("\u3042\u3044".force_encoding(Encoding::ASCII_8BIT), f.read_nonblock(f.size))
+ f.rewind
+ # not empty buffer
+ s = '0123456789'
+ assert_equal("\u3042\u3044".force_encoding(Encoding::ASCII_8BIT), f.read_nonblock(f.size, s))
end
def test_size
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