465 lines
15 KiB
Lua
Executable file
465 lines
15 KiB
Lua
Executable file
--[[
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/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2017 William Wilgus
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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]]
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if ... == nil then rb.splash(rb.HZ * 3, "use 'require'") end
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require("printtable")
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local _clr = require("color")
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local _lcd = require("lcd")
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local _print = require("print")
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local _timer = require("timer")
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require("actions")
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local CANCEL_BUTTON = rb.actions.PLA_CANCEL
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--------------------------------------------------------------------------------
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-- builds an index of byte position of every line at each bufsz increment
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-- in filename; bufsz == 1 would be every line; saves to filename.ext.idx_ext
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-- lnbyte should be nil for text files and number of bytes per line for binary
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local function build_file_index(filename, idx_ext, bufsz, lnbyte)
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if not filename then return end
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local file = io.open('/' .. filename, "r") --read
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if not file then _lcd:splashf(100, "Can't open %s", filename) return end
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local fsz = file:seek("end")
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local fsz_kb = fsz / 1024
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local count
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local ltable = {0} --first index is the beginning of the file
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local timer = _timer()
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local fread
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_lcd:splashf(100, "Indexing file %d Kb", (fsz / 1024))
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if lnbyte then
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fread = function(f) return f:read(lnbyte) end
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else
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lnbyte = -1
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fread = function(f) return f:read("*l") end
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end
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file:seek("set", 0)
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for i = 1, fsz do
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if i % bufsz == 0 then
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local loc = file:seek()
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ltable[#ltable + 1] = loc
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_lcd:splashf(1, "Parsing %d of %d Kb", loc / 1024, fsz_kb)
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end
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if rb.get_plugin_action(0) == CANCEL_BUTTON then
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return
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end
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if not fread(file) then
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count = i
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break
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end
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end
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local fileidx = io.open('/' .. filename .. idx_ext, "w+") -- write/erase
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if fileidx then
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fileidx:write(fsz .. "\n")
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fileidx:write(count .. "\n")
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fileidx:write(bufsz .. "\n")
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fileidx:write(lnbyte .. "\n")
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fileidx:write(table.concat(ltable, "\n"))
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fileidx:close()
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_lcd:splashf(100, "Finished in %d seconds", timer.stop() / rb.HZ)
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collectgarbage("collect")
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else
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error("unable to save index file")
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end
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end -- build_file_index
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--------------------------------------------------------------------------------
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--- returns size of original file, total lines buffersize, and table filled
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-- with line offsets in index file -> filename
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local function load_index_file(filename)
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local filesz, count, bufsz, lnbyte
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local ltable
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local fileidx = io.open('/' .. filename, "r") --read
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if fileidx then
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local idx = -3
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ltable = {}
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fileidx:seek("set", 0)
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for line in fileidx:lines() do
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if idx == -3 then
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filesz = tonumber(line)
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elseif idx == -2 then
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count = tonumber(line)
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elseif idx == -1 then
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bufsz = tonumber(line)
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elseif idx == 0 then
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lnbyte = tonumber(line)
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else
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ltable[idx] = tonumber(line)
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end
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idx = idx + 1
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end
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fileidx:close()
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end
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return lnbyte, filesz, count, bufsz, ltable
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end -- load_index_file
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--------------------------------------------------------------------------------
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-- creates a fixed index with fixed line lengths, perfect for viewing hex files
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-- not so great for reading text files but works as a fallback
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local function load_fixed_index(bytesperline, filesz, bufsz)
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local lnbyte = bytesperline
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local count = (filesz + lnbyte - 1) / lnbyte + 1
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local idx_t = {} -- build index
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for i = 0, filesz, bufsz do
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idx_t[#idx_t + 1] = lnbyte * i
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end
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return lnbyte, filesz, count, bufsz, idx_t
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end -- load_fixed_index
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--------------------------------------------------------------------------------
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-- uses print_table to display a whole file
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function print_file(filename, maxlinelen, settings)
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if not filename then return end
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local file = io.open('/' .. filename or "", "r") --read
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if not file then _lcd:splashf(100, "Can't open %s", filename) return end
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maxlinelen = 33
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local hstr = filename
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local ftable = {}
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table.insert(ftable, 1, hstr)
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local tline = #ftable + 1
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local remln = maxlinelen
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local posln = 1
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for line in file:lines() do
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if line then
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if maxlinelen then
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if line == "" then
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ftable[tline] = ftable[tline] or ""
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tline = tline + 1
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remln = maxlinelen
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else
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line = line:match("%w.+") or ""
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end
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local linelen = line:len()
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while linelen > 0 do
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local fsp = line:find("%s", posln + remln - 5) or 0x0
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fsp = fsp - (posln + remln)
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if fsp >= 0 then
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local fspr = fsp
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fsp = line:find("%s", posln + remln) or linelen
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fsp = fsp - (posln + remln)
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if math.abs(fspr) < fsp then fsp = fspr end
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end
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if fsp > 5 or fsp < -5 then fsp = 0 end
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local str = line:sub(posln, posln + remln + fsp)
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local slen = str:len()
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ftable[tline] = ftable[tline] or ""
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ftable[tline] = ftable[tline] .. str
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linelen = linelen - slen
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if linelen > 0 then
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tline = tline + 1
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posln = posln + slen
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remln = maxlinelen
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--loop continues
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else
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ftable[tline] = ftable[tline] .. " "
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remln = maxlinelen - slen
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posln = 1
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--loop ends
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end
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end
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else
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ftable[#ftable + 1] = line
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end
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end
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end
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file:close()
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_lcd:clear()
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_print.clear()
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if not settings then
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settings = {}
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settings.justify = "center"
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settings.wrap = true
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settings.msel = true
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end
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settings.hasheader = true
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settings.co_routine = nil
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local sel =
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print_table(ftable, #ftable, settings)
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_lcd:splashf(rb.HZ * 2, "%d items {%s}", #sel, table.concat(sel, ", "))
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ftable = nil
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end -- print_file
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--------------------------------------------------------------------------------
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-- uses print_table to display a portion of a file
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function print_file_increment(filename, settings)
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if not filename then return end
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local file = io.open('/' .. filename, "r") --read
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if not file then _lcd:splashf(100, "Can't open %s", filename) return end
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local fsz = file:seek("end")
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local bsz = 1023
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--if small file do it the easier way and load whole file to table
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if fsz < 60 * 1024 then
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file:close()
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print_file(filename, settings)
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return
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end
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local ext = ".idx"
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local lnbyte, filesz, count, bufsz, idx_t = load_index_file(filename .. ext)
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if not idx_t or fsz ~= filesz then -- build file index
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build_file_index(filename, ext, bsz)
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lnbyte, filesz, count, bufsz, idx_t = load_index_file(filename .. ext)
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end
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-- if invalid or user canceled creation fallback to a fixed index
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if not idx_t or fsz ~= filesz or count <= 0 then
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_lcd:splashf(rb.HZ * 5, "Unable to read file index %s", filename .. ext)
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lnbyte, filesz, count, bufsz, idx_t = load_fixed_index(32, fsz, bsz)
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end
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if not idx_t or fsz ~= filesz or count <= 0 then
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_lcd:splashf(rb.HZ * 5, "Unable to load file %s", filename)
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return
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end
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local hstr = filename
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local file_t = setmetatable({},{__mode = "kv"}) --weak keys and values
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-- this allows them to be garbage collected as space is needed
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-- rebuilds when needed
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local ovf = 0
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local lpos = 1
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local timer = _timer()
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file:seek("set", 0)
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function print_co()
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while true do
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collectgarbage("step")
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file_t[1] = hstr --position 1 is ALWAYS header/title
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for i = 1, bufsz + ovf do
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file_t[lpos + i] = file:read ("*l")
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end
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ovf = 0
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lpos = lpos + bufsz
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local bpos = coroutine.yield()
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if bpos <= lpos then -- roll over or scroll up
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bpos = (bpos - bufsz) + bpos % bufsz
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timer:check(true)
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end
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lpos = bpos - bpos % bufsz
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if lpos < 1 then
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lpos = 1
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elseif lpos > count - bufsz then -- partial fill
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ovf = count - bufsz - lpos
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end
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--get position in file of the nearest indexed line
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file:seek("set", idx_t[bpos / bufsz + 1])
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-- on really large files if it has been more than 10 minutes
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-- since the user scrolled up the screen wipe out the prior
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-- items to free memory
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if lpos % 5000 == 0 and timer:check() > rb.HZ * 600 then
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for i = 1, lpos - 100 do
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file_t[i] = nil
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end
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end
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end
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end
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co = coroutine.create(print_co)
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_lcd:clear()
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_print.clear()
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if not settings then
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settings = {}
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settings.justify = "center"
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settings.wrap = true
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end
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settings.hasheader = true
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settings.co_routine = co
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settings.msel = false
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table.insert(file_t, 1, hstr) --position 1 is header/title
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local sel =
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print_table(file_t, count, settings)
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file:close()
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idx_t = nil
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file_t = nil
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return sel
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end --print_file_increment
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--------------------------------------------------------------------------------
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function print_file_hex(filename, bytesperline, settings)
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if not filename then return end
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local file = io.open('/' .. filename, "r") --read
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if not file then _lcd:splashf(100, "Can't open %s", filename) return end
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local hstr = filename
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local bpl = bytesperline
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local fsz = file:seek("end")
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--[[
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local filesz = file:seek("end")
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local bufsz = 1023
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local lnbyte = bytesperline
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local count = (filesz + lnbyte - 1) / lnbyte + 1
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local idx_t = {} -- build index
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for i = 0, filesz, bufsz do
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idx_t[#idx_t + 1] = lnbyte * i
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end]]
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local lnbyte, filesz, count, bufsz, idx_t = load_fixed_index(bpl, fsz, 1023)
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local file_t = setmetatable({},{__mode = "kv"}) --weak keys and values
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-- this allows them to be garbage collected as space is needed
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-- rebuilds when needed
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local ovf = 0
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local lpos = 1
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local timer = _timer()
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file:seek("set", 0)
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function hex_co()
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while true do
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collectgarbage("step")
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file_t[1] = hstr --position 1 is ALWAYS header/title
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for i = 1, bufsz + ovf do
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local pos = file:seek()
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local s = file:read (lnbyte)
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if not s then -- EOF
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file_t[lpos + i] = ""
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break;
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end
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local s_len = s:len()
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if s_len > 0 then
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local fmt = "0x%04X: " .. string.rep("%02X ", s_len)
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local schrs = " " .. s:gsub("(%c)", " . ")
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file_t[lpos + i] = string.format(fmt, pos, s:byte(1, s_len)) ..
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schrs
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else
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file_t[lpos + i] = string.format("0x%04X: ", pos)
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end
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end
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ovf = 0
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lpos = lpos + bufsz
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local bpos = coroutine.yield()
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if bpos < lpos then -- roll over or scroll up
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bpos = (bpos - bufsz) + bpos % bufsz
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timer:check(true)
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end
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lpos = bpos - bpos % bufsz
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if lpos < 1 then
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lpos = 1
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elseif lpos > count - bufsz then -- partial fill
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ovf = count - bufsz - lpos
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end
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--get position in file of the nearest indexed line
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file:seek("set", idx_t[bpos / bufsz + 1])
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-- on really large files if it has been more than 10 minutes
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-- since the user scrolled up the screen wipe out the prior
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-- items to free memory
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if lpos % 10000 == 0 and timer:check() > rb.HZ * 600 then
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for i = 1, lpos - 100 do
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file_t[i] = nil
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end
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end
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end
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end
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co = coroutine.create(hex_co)
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local function repl(char)
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local ret = ""
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if char:sub(1,2) == "0x" then
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return string.format("%dd:", tonumber(char:sub(3, -2), 16))
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else
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return string.format("%03d ", tonumber(char, 16))
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end
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end
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_lcd:clear()
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_print.clear()
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local sel, start, vcur = 1
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table.insert(file_t, 1, hstr) --position 1 is header/title
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if not settings then
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settings = {}
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settings.justify = "left"
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settings.wrap = true
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settings.msel = false
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settings.hfgc = _clr.set( 0, 000, 000, 000)
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settings.hbgc = _clr.set(-1, 255, 255, 255)
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settings.ifgc = _clr.set(-1, 255, 255, 255)
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settings.ibgc = _clr.set( 0, 000, 000, 000)
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settings.iselc = _clr.set( 1, 000, 200, 100)
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end
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settings.hasheader = true
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settings.co_routine = co
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settings.start = start
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settings.curpos = vcur
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while sel > 0 do
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settings.start = start
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settings.curpos = vcur
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sel, start, vcur = print_table(file_t, count, settings)
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if sel > 1 and file_t[sel] then -- flips between hex and decimal
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local s = file_t[sel]
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if s:sub(-1) == "\b" then
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file_t[sel] = nil
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ovf = -(bufsz - 1)
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coroutine.resume(co, sel) --rebuild this item
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else
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s = s:gsub("(0x%x+:)", repl) .. "\b"
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file_t[sel] = s:gsub("(%x%x%s)", repl) .. "\b"
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end
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end
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end
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file:close()
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idx_t = nil
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file_t = nil
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return sel
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end -- print_file_hex
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--------------------------------------------------------------------------------
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