Class: FWI::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/fwi/parser.rb

Constant Summary collapse

TYPE_MAP = 
{
    "float64"   => :float64,
    "float32"   => :float32,
    "u64"       => :u64,
    "u32"       => :u32,
    "u16"       => :u16,
    "u8"        => :u8,
    "i64"       => :i64,
    "i32"       => :i32,
    "i16"       => :i16,
    "i8"        => :i8,
    "string"    => :string,
    "bool"      => :bool,

    "blank"     => :blank,

    "float"     => :float32,
    "double"    => :float64,
    "ulong"     => :u64,
    "long"      => :i64,
    "uint"      => :u32,
    "int"       => :i32,
    "ushort"    => :u16,
    "short"     => :i16,
    "char"      => :i8,
    "uchar"     => :u8,
    "byte"      => :i8,
    "ubyte"     => :u8,
    "boolean"   => :bool,
    "bit"       => :bool
}
TYPE_SIZES = 
{
    :float64 => 8,
    :u64 => 8,
    :i64 => 8,

    :float32 => 4,
    :u32 => 4,
    :i32 => 4,

    :u16 => 2,
    :i16 => 2,

    :u8 => 1,
    :i8 => 1
}

Instance Method Summary collapse

Instance Method Details

#bitmap(lex) ⇒ Object 



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# File 'lib/fwi/parser.rb', line 251

def bitmap lex
    lex[:block_order].each do |block_name|
        block = lex
        block_name.split("::").each { |x| block = block[:members][x] }
        
        bools, nonbools = block[:members].partition { |el| el[:type] == :bool && el[:array].nil? }
        idx = 0

        bools.each_slice(8) do |byte|
            byte.each_with_index do |bitvalue, i|
                bitvalue[:bit_index] = i
                bitvalue[:index] = idx
            end
            idx += 1
        end

        nonbools.each do |member|
            t = member[:type]
            n = member[:name]

            arraysize = 1
            arraysize = member[:array] unless member[:array].nil?

            if t == :bool
                # It must be a boolean array.
                total_size = (arraysize / 8.to_f).ceil
                member[:index] = idx
                member[:size] = total_size
                idx += total_size
            elsif t == :blank
                idx += arraysize
            elsif t == :string
                typesize = member[:attributes][0].to_i
                len = typesize * arraysize
                member[:index] = idx
                member[:size] = len
                member[:typesize] = typesize
                idx += len
            elsif t == :reference
                if member[:element_type] == :block
                    referenced = lex
                    member[:element_name].split("::").each { |a| referenced = referenced[:members][a] }
                    
                    size = referenced[:size] * arraysize
                    member[:size] = size
                    member[:index] = idx
                    member[:typesize] = referenced[:size]
                    idx += size
                elsif member[:element_type] == :enum
                    member[:size] = arraysize
                    member[:typesize] = 1
                    member[:index] = idx
                    idx += arraysize
                end
            else
                size = TYPE_SIZES[t] * arraysize
                member[:size] = size
                member[:index] = idx
                member[:typesize] = TYPE_SIZES[t]
                idx += size
            end
        end
        
        # Remove :blank types
        block[:members].each_index.select { |i| block[:members][i][:type] == :blank }.each { |x| block[:members].delete_at(x) }
        
        # Final Size
        block[:size] = idx
    end
    lex
end

#lex(src_file, src_dir) ⇒ Object

Do the initial parsing on the file



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# File 'lib/fwi/parser.rb', line 59

def lex src_file, src_dir
    src = File.read(File.join(src_dir, src_file))
    hash = { 
        :members => {}, 
        :files => { 
            src_file => { 
                :imports => [],
                :enums => [],
                :blocks => []
            } 
        }, 
        :block_order => [] 
    }
    file = hash[:files][src_file]

    _blevel = []
    hashobj = lambda do
        hr = hash
        _blevel.select { |n| n[:type] == :namespace }.each do |ns|
            hr = hr[:members][ns[:name]]
        end
        hr
    end

    namespacedive = lambda do |fqn|
        hr = hash
        comp = fqn.split("::")
        _blevel.select { |x| x[:type] == :namespace }.each do |b|
            return nil if hr.nil?
            hr = hr[:members][b[:name]]
        end
        comp.each do |c|
            return nil if hr.nil?
            hr = hr[:members][c]
        end
        hr
    end

    rootdive = lambda do |fqn|
        hr = hash
        comp = fqn.split("::")
        comp.each do |a|
            return nil if hr.nil?
            hr = hr[:members][a]
        end
        hr
    end

    current_fqn = lambda do
        _blevel.select { |n| n[:type] == :namespace }.map { |n| n[:name] }.join("::")
    end

    findtype = lambda do |tn|
        return tn unless rootdive[tn].nil?
        unless namespacedive[tn].nil?
            return [current_fqn[], tn].join("::")
        end
        usings = _blevel.each_index.map { |x| Hash[x, _blevel[x]] if _blevel[x][:type] == :using }.reject(&:nil?)
        usings.size.times do |time|
            afqn = [usings.first(time + 1).map { |x| x.values[0][:name] }, tn].join("::")
            return afqn unless rootdive[afqn].nil?
            return [current_fqn[], afqn].join("::") unless namespacedive[afqn].nil?
        end
        nil
    end

    _enumidx = 0

    src.each_line.map(&:strip).reject { |l| l.start_with?("//") || l.start_with?("#") }.each do |line|
        tok = line.split(/\s+/).reject(&:empty?)
        unless _blevel.empty? || tok[0] == "}"
            cur = _blevel.last
            b_name = cur[:name]
            b_type = cur[:type]
            h = hashobj[][:members][b_name]

            if b_type == :block
                type, vals = line.split(/\s+/, 2)

                next if vals.nil?
                vals.split(/\s*,\s*/).each do |splitcomma|
                    name, *attrib = splitcomma.split(/\s+/).reject(&:empty?)
                    array_match = /(.+)\[([0-9]+)\]/.match(name)
                    arrlen = 1

                    unless array_match.nil?
                        name = array_match[1]
                        arrlen = array_match[2].to_i
                    end

                    type_s = TYPE_MAP[type]
                    m = { :type => type_s, :name => name, :original_type => type }
                    m[:attributes] = attrib
                    m[:attribute_map] = Hash[attrib.select { |x| x.is_a?(String) && x.include?("=") }.map { |x| x.split(/\s*=\s*/, 2) }]

                    if m[:type].nil?
                        fqn = findtype[type]
                        throw "Can't find type: #{type}" if fqn.nil?
                        m[:type] = :reference
                        m[:element_name] = fqn
                        m[:element_type] = rootdive[fqn][:type]

                        spl = fqn.split("::")
                        spl_cu = current_fqn[].split("::")

                        min = spl - spl_cu
                        if min.empty?
                            m[:reltype] = fqn
                        else
                            m[:reltype] = min.join("::")
                        end
                    end

                    unless arrlen == 1
                        m[:array] = arrlen
                    end
                    h[:members] << m
                end
            elsif b_type == :enum
                line.split(",").each do |ln|
                    a, b, c = ln.split(/\s+/).reject(&:empty?)

                    if !b.nil? && b == "="
                        _enumidx = c.to_i
                    end
                    h[:members] << { :name => a, :val => _enumidx}
                    _enumidx = _enumidx + 1
                end
            end
        end
        
        if tok[0] == "}"
            _blevel.pop
        elsif tok[0] == "namespace"
            if tok[2] == "{"
                hashobj[][:members][tok[1]] = { :type => :namespace, :members => {} }
                _blevel << { :type => :namespace, :name => tok[1] }
            else
                tok[1].split("::").each do |ns|
                    hashobj[][:members][ns] = { :type => :namespace, :members => {} }
                    _blevel << { :type => :namespace, :name => ns }
                end
            end
        elsif tok[0] == "block"
            cur = current_fqn[]
            fulltype = tok[1]
            fulltype = cur + "::" + tok[1] unless cur.empty?

            hashobj[][:members][tok[1]] = { 
                :type => :block, 
                :members => [], 
                :file => src_file,
                :fulltype => fulltype
            }

            # Block Order is used by the bitmap generator to decide what order to process block sizes
            # and references in. This means that declaration order matters
            hash[:block_order] << fulltype
            file[:blocks] << fulltype

            _blevel << { :type => :block, :name => tok[1] }
        elsif tok[0] == "enum"
            cur = current_fqn[]
            fulltype = tok[1]
            fulltype = cur + "::" + tok[1] unless cur.empty?

            hashobj[][:members][tok[1]] = { 
                :type => :enum, 
                :members => [], 
                :file => src_file,
                :fulltype => fulltype
            }
            _enumidx = 0
            _blevel << { :type => :enum, :name => tok[1] }

            file[:enums] << fulltype
        elsif tok[0] == "using" && tok[1] == "namespace"
            if tok[3] == "{"
                _blevel << { :type => :using, :name => tok[2] }
            else
                tok[2].split("::").each do |ns|
                    _blevel << { :type => :using, :name => ns }
                end
            end
        elsif tok[0] == "import"
            file[:imports] << tok[1]
            hash = hash.deep_merge(lex(tok[1], src_dir))
        end
    end
    hash
end