86 lines
2.9 KiB
Lua
86 lines
2.9 KiB
Lua
----------------------
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-- --
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-- PARSER --
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-- --
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----------------------
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local function assemble(source)
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local proto = {
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constants = {},
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functions = {},
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}
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local section = ''
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local current_f_id = 0
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local next_label = nil
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for line in source:gmatch("([^\n]+)") do
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local line = line:gsub("%s*;.*$", "") -- remove comments
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line = line:match("^%s*(.-)%s*$") -- trim
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if #line == 0 then goto continue end
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if line == ".const" then
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section = 'const'
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elseif line:match("%.func%s+%d+") then
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section = 'function'
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local f_id = tonumber(line:match("%.func%s+(%d+)"))
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proto.functions[f_id] = {}
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current_f_id = f_id
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elseif section == 'const' then
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local k, v = line:match("^%s*(%d+)%s*:%s*(.+)$")
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if not k then error("Invalid row for constant: " .. line) end
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if v:sub(1, 1) == '"' then
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proto.constants[tonumber(k)] = line:match('"(.*)"')
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else
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proto.constants[tonumber(k)] = tonumber(v)
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end
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elseif section == 'function' then
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local regexes = {
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"^%s*(%a+)%s+(%d+)%s*$", -- instruction + parameter
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"^%s*(%a+)%s+(@[%a_][%a%d_]*)%s*$", -- instruction + label
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"^%s*(%a+)%s*$", -- instruction only
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"^(@[%a_][%a%d_]*):%s*$", -- label
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}
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local match = false
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for i,regex in ipairs(regexes) do
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local inst, par = line:match(regex)
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if inst then
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match = true
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if i == 1 then -- instruction + parameter
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table.insert(proto.functions[current_f_id], { inst, tonumber(par), labels = next_label })
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elseif i == 2 then -- instruction + label
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table.insert(proto.functions[current_f_id], { inst, par, labels = next_label })
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elseif i == 3 then -- instruction only
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table.insert(proto.functions[current_f_id], { inst, labels = next_label })
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elseif i == 4 then -- label
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if not next_label then
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next_label = { inst }
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else
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table.insert(next_label, inst)
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end
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end
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if i ~= 4 then
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next_label = nil
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end
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end
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end
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if not match then error("Invalid instruction: " .. line) end
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end
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::continue::
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end
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return proto
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end
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----------------------
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-- --
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-- GENERIC --
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-- --
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----------------------
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return function(source)
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print('test')
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return { 0, 1, 2, 3, 4 }
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end |