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-rw-r--r--ext/json/lib/json/pure.rb75
1 files changed, 75 insertions, 0 deletions
diff --git a/ext/json/lib/json/pure.rb b/ext/json/lib/json/pure.rb
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+++ b/ext/json/lib/json/pure.rb
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+require 'json/common'
+require 'json/pure/parser'
+require 'json/pure/generator'
+
+module JSON
+ begin
+ require 'iconv'
+ # An iconv instance to convert from UTF8 to UTF16 Big Endian.
+ UTF16toUTF8 = Iconv.new('utf-8', 'utf-16be') # :nodoc:
+ # An iconv instance to convert from UTF16 Big Endian to UTF8.
+ UTF8toUTF16 = Iconv.new('utf-16be', 'utf-8') # :nodoc:
+ UTF8toUTF16.iconv('no bom')
+ rescue Errno::EINVAL, Iconv::InvalidEncoding
+ # Iconv doesn't support big endian utf-16. Let's try to hack this manually
+ # into the converters.
+ begin
+ old_verbose, $VERBSOSE = $VERBOSE, nil
+ # An iconv instance to convert from UTF8 to UTF16 Big Endian.
+ UTF16toUTF8 = Iconv.new('utf-8', 'utf-16') # :nodoc:
+ # An iconv instance to convert from UTF16 Big Endian to UTF8.
+ UTF8toUTF16 = Iconv.new('utf-16', 'utf-8') # :nodoc:
+ UTF8toUTF16.iconv('no bom')
+ if UTF8toUTF16.iconv("\xe2\x82\xac") == "\xac\x20"
+ swapper = Class.new do
+ def initialize(iconv) # :nodoc:
+ @iconv = iconv
+ end
+
+ def iconv(string) # :nodoc:
+ result = @iconv.iconv(string)
+ JSON.swap!(result)
+ end
+ end
+ UTF8toUTF16 = swapper.new(UTF8toUTF16) # :nodoc:
+ end
+ if UTF16toUTF8.iconv("\xac\x20") == "\xe2\x82\xac"
+ swapper = Class.new do
+ def initialize(iconv) # :nodoc:
+ @iconv = iconv
+ end
+
+ def iconv(string) # :nodoc:
+ string = JSON.swap!(string.dup)
+ @iconv.iconv(string)
+ end
+ end
+ UTF16toUTF8 = swapper.new(UTF16toUTF8) # :nodoc:
+ end
+ rescue Errno::EINVAL, Iconv::InvalidEncoding
+ raise MissingUnicodeSupport, "iconv doesn't seem to support UTF-8/UTF-16 conversions"
+ ensure
+ $VERBOSE = old_verbose
+ end
+ rescue LoadError
+ raise MissingUnicodeSupport,
+ "iconv couldn't be loaded, which is required for UTF-8/UTF-16 conversions"
+ end
+
+ # Swap consecutive bytes of _string_ in place.
+ def self.swap!(string) # :nodoc:
+ 0.upto(string.size / 2) do |i|
+ break unless string[2 * i + 1]
+ string[2 * i], string[2 * i + 1] = string[2 * i + 1], string[2 * i]
+ end
+ string
+ end
+
+ # This module holds all the modules/classes that implement JSON's
+ # functionality in pure ruby.
+ module Pure
+ $DEBUG and warn "Using pure library for JSON."
+ JSON.parser = Parser
+ JSON.generator = Generator
+ end
+end