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