92 lines
1.8 KiB
Lua
92 lines
1.8 KiB
Lua
--[[
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vm16
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====
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Copyright (C) 2019-2022 Joachim Stolberg
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GPL v3
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See LICENSE.txt for more information
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Programmer helper functions
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]]--
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-- for lazy programmers
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local M = minetest.get_meta
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local strfind = string.find
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local strsub = string.sub
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local tinsert = table.insert
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local Cache = {} -- [hash] = {}
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vm16.prog = {}
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function vm16.prog.get_mem(pos)
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local hash = minetest.hash_node_position(pos)
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Cache[hash] = Cache[hash] or {}
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return Cache[hash]
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end
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function vm16.prog.get_linenum(lToken, addr)
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for idx = #lToken, 1, -1 do
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local tok = lToken[idx]
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if tok.address == addr then
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return tok.lineno
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end
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end
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return 0
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end
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function vm16.prog.strsplit(text)
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local list = {}
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local pos = 1
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while true do
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local first, last = strfind(text, "\n", pos)
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if first then -- found?
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tinsert(list, strsub(text, pos, first-1))
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pos = last+1
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else
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tinsert(list, strsub(text, pos))
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break
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end
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end
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return list
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end
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function vm16.prog.to_char(val)
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if val >= 32 and val <= 127 then
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return string.char(val)
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end
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return "."
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end
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function vm16.prog.to_string(val)
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if val > 255 then
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return vm16.prog.to_char(val / 256) .. vm16.prog.to_char(val % 256)
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else
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return vm16.prog.to_char(val)
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end
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end
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--local function get_window(mem, lineno, size)
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-- if mem.scroll_lineno then
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-- return mem.scroll_lineno, mem.scroll_lineno + 16
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-- end
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-- mem.start_idx = mem.start_idx or 1
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-- if lineno > mem.start_idx + 12 then
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-- mem.start_idx = lineno - 12
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-- elseif lineno > 3 and lineno < mem.start_idx + 3 then
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-- mem.start_idx = lineno - 3
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-- end
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-- return mem.start_idx, math.min(mem.start_idx + 16, size)
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--end
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function vm16.prog.get_cpu_def(cpu_pos)
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local node = minetest.get_node(cpu_pos)
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local ndef = minetest.registered_nodes[node.name]
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if ndef and ndef.vm16_cpu then
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return ndef.vm16_cpu
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end
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end
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