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lua/manual/2html
Roberto Ierusalimschy b96b0b5abb Added macro 'luaL_pushfail' 
The macro 'luaL_pushfail' documents all places in the standard libraries
that return nil to signal some kind of failure. It is defined as
'lua_pushnil'. The manual also got a notation (@fail) to document those
returns. The tests were changed to be agnostic regarding whether 'fail'
is 'nil' or 'false'.
2019-08-16 14:58:02 -03:00

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#!/usr/bin/env lua5.3
-- special marks:
-- \1 - paragraph (empty line)
-- \4 - remove spaces around it
-- \3 - ref (followed by label|)
---------------------------------------------------------------
header = [[
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<html>
<head>
<title>Lua 5.4 Reference Manual</title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<link rel="stylesheet" href="lua.css">
<link rel="stylesheet" href="manual.css">
</head>
<body bgcolor="#FFFFFF">
<hr>
<h1>
<a href="http://www.lua.org/home.html"><img src="logo.gif" alt="[Lua logo]" border="0"></a>
Lua 5.4 Reference Manual
</h1>
by Roberto Ierusalimschy, Luiz Henrique de Figueiredo, Waldemar Celes
<p>
<small>
<a href="http://www.lua.org/copyright.html">Copyright</a>
&copy; 2019 Lua.org, PUC-Rio. All rights reserved.
</small>
<hr>
<!-- ====================================================================== -->
<p>
]]
footer = "\n\n</body></html>\n\n"
local seefmt = '(see %s)'
if arg[1] == 'port' then
seefmt = '(ver %s)'
header = string.gsub(header, "by (.-)\n",
"%1\n<p>Tradu&ccedil;&atilde;o: S&eacute;rgio Queiroz de Medeiros", 1)
header = string.gsub(header, "Lua (%d+.%d+) Reference Manual",
"Manual de Refer&ecirc;ncia de Lua %1")
header = string.gsub(header, "All rights reserved",
"Todos os direitos reservados")
end
---------------------------------------------------------------
local function compose (f,g)
assert(f and g)
return function (s) return g(f(s)) end
end
local function concat (f, g)
assert(f and g)
return function (s) return f(s) .. g(s) end
end
local Tag = {}
setmetatable(Tag, {
__index = function (t, tag)
local v = function (n, att)
local e = ""
if type(att) == "table" then
for k,v in pairs(att) do e = string.format('%s %s="%s"', e, k, v) end
end
if n then
return string.format("<%s%s>%s</%s>", tag, e, n, tag)
else
return string.format("<%s%s>", tag, e)
end
end
t[tag] = v
return v
end
})
---------------------------------------------------------------
local labels = {}
local function anchor (text, label, link, textlink)
if labels[label] then
error("label " .. label .. " already defined")
end
labels[label] = {text = textlink, link = link}
return Tag.a(text, {name=link})
end
local function makeref (label)
assert(not string.find(label, "|"))
return string.format("\3%s\3", label)
end
local function ref (label)
local l = labels[label]
if not l then
io.stderr:write("label ", label, " undefined\n")
return "@@@@@@@"
else
return Tag.a(l.text, {href="#"..l.link})
end
end
---------------------------------------------------------------
local function nopara (t)
t = string.gsub(t, "\1", "\n\n")
t = string.gsub(t, "<p>%s*</p>", "")
return t
end
local function fixpara (t)
t = string.gsub(t, "\1", "\n</p>\n\n<p>\n")
t = string.gsub(t, "<p>%s*</p>", "")
return t
end
local function antipara (t)
return "</p>\n" .. t .. "<p>"
end
Tag.pre = compose(Tag.pre, antipara)
Tag.ul = compose(Tag.ul, antipara)
---------------------------------------------------------------
local Gfoots = 0
local footnotes = {}
local line = Tag.hr(nil)
local function dischargefoots ()
if #footnotes == 0 then return "" end
local fn = table.concat(footnotes)
footnotes = {}
return line .. Tag.h3"footnotes:" .. fn .. line
end
local Glists = 0
local listings = {}
local function dischargelist ()
if #listings == 0 then return "" end
local l = listings
listings = {}
return line .. table.concat(l, line..line) .. line
end
---------------------------------------------------------------
local counters = {
h1 = {val = 1},
h2 = {father = "h1", val = 1},
h3 = {father = "h2", val = 1},
listing = {father = "h1", val = 1},
}
local function inccounter (count)
counters[count].val = counters[count].val + 1
for c, v in pairs(counters) do
if v.father == count then v.val = 1 end
end
end
local function getcounter (count)
local c = counters[count]
if c.father then
return getcounter(c.father) .. "." .. c.val
else
return c.val .. ""
end
end
---------------------------------------------------------------
local function fixed (x)
return function () return x end
end
local function id (x) return x end
local function prepos (x, y)
assert(x and y)
return function (s) return string.format("%s%s%s", x, s, y) end
end
local rw = Tag.b
local function LuaName (name)
return Tag.code(name)
end
local function getparam (s)
local i, e = string.find(s, "^[^%s@|]+|")
if not i then return nil, s
else return string.sub(s, i, e - 1), string.sub(s, e + 1)
end
end
local function gettitle (h)
local title, p = assert(string.match(h, "<title>(.-)</title>()"))
return title, string.sub(h, p)
end
local function getparamtitle (what, h, nonum)
local label, title, c, count
label, h = getparam(h)
title, h = gettitle(h)
if not nonum then
count = getcounter(what)
inccounter(what)
c = string.format("%s &ndash; ", count)
else
c = ""
end
label = label or count
if label then
title = anchor(title, label, count, "&sect;"..count)
end
title = string.format("%s%s", c, title)
return title, h
end
local function section (what, nonum)
return function (h)
local title
title, h = getparamtitle(what, h, nonum)
local fn = what == "h1" and dischargefoots() or ""
h = fixpara(Tag.p(h))
return "</p>\n" .. Tag[what](title) .. h .. fn ..
dischargelist() .. "<p>"
end
end
local function verbatim (s)
s = nopara(s)
s = string.gsub(s, "\n", "\n ")
s = string.gsub(s, "\n%s*$", "\n")
return Tag.pre(s)
end
local function verb (s)
return Tag.code(s)
end
local function lua2link (e)
return string.find(e, "luaL?_") and e or "pdf-"..e
end
local verbfixed = verb
local Tex = {
ANSI = function (func)
return "ISO&nbsp;C function " .. Tag.code(func)
end,
At = fixed"@",
B = Tag.b,
bigskip = fixed"",
bignum = id,
C = fixed"",
Ci = prepos("<!-- ", " -->"),
CId = function (func)
return "C&nbsp;function " .. Tag.code(func)
end,
chapter = section"h1",
Char = compose(verbfixed, prepos("'", "'")),
Cdots = fixed"&middot;&middot;&middot;",
Close = fixed"}",
col = Tag.td,
defid = function (name)
local l = lua2link(name)
local c = Tag.code(name)
return anchor(c, l, l, c)
end,
def = Tag.em,
description = compose(nopara, Tag.ul),
Em = fixed("\4" .. "&mdash;" .. "\4"),
emph = Tag.em,
emphx = Tag.em, -- emphasis plus index (if there was an index)
En = fixed("&ndash;"),
format = fixed"",
["false"] = fixed(Tag.b"false"),
id = Tag.code,
idx = Tag.code,
index = fixed"",
Lidx = fixed"", -- Tag.code,
ldots = fixed"...",
x = id,
itemize = compose(nopara, Tag.ul),
leq = fixed"&le;",
Lid = function (s)
return makeref(lua2link(s))
end,
M = Tag.em,
N = function (s) return (string.gsub(s, " ", "&nbsp;")) end,
NE = id, -- tag"foreignphrase",
num = id,
["nil"] = fixed(Tag.b"nil"),
fail = fixed(Tag.b"fail"),
Open = fixed"{",
part = section("h1", true),
Pat = compose(verbfixed, prepos("'", "'")),
preface = section("h1", true),
psect = section("h2", true),
Q = prepos('"', '"'),
refchp = makeref,
refcode = makeref,
refsec = makeref,
pi = fixed"&pi;",
rep = Tag.em, -- compose(prepos("&lt;", "&gt;"), Tag.em),
Rw = rw,
rw = rw,
sb = Tag.sub,
sp = Tag.sup,
St = compose(verbfixed, prepos('"', '"')),
sect1 = section"h1",
sect2 = section"h2",
sect3 = section"h3",
sect4 = section("h4", true),
simplesect = id,
Tab2 = function (s) return Tag.table(s, {border=1}) end,
row = Tag.tr,
title = Tag.title,
todo = Tag.todo,
["true"] = fixed(Tag.b"true"),
T = verb,
item = function (s)
local t, p = string.match(s, "^([^\n|]+)|()")
if t then
s = string.sub(s, p)
s = Tag.b(t..": ") .. s
end
return Tag.li(fixpara(s))
end,
verbatim = verbatim,
manual = id,
-- for the manual
link =function (s)
local l, t = getparam(s)
assert(l)
return string.format("%s (%s)", t, makeref(l))
end,
see = function (s) return string.format(seefmt, makeref(s)) end,
See = makeref,
seeC = function (s)
return string.format(seefmt, makeref(s))
end,
seeF = function (s)
return string.format(seefmt, makeref(lua2link(s)))
end,
APIEntry = function (e)
local h, name
h, e = string.match(e, "^%s*(.-)%s*|(.*)$")
name = string.match(h, "(luaL?_[%w_]+)%)? +%(") or
string.match(h, "luaL?_[%w_]+")
local a = anchor(Tag.code(name), name, name, Tag.code(name))
local apiicmd, ne = string.match(e, "^(.-</span>)(.*)")
--io.stderr:write(e)
if not apiicmd then
return antipara(Tag.hr() .. Tag.h3(a)) .. Tag.pre(h) .. e
else
return antipara(Tag.hr() .. Tag.h3(a)) .. apiicmd .. Tag.pre(h) .. ne
end
end,
LibEntry = function (e)
local h, name
h, e = string.match(e, "^(.-)|(.*)$")
name = string.gsub(h, " (.+", "")
local l = lua2link(name)
local a = anchor(Tag.code(h), l, l, Tag.code(name))
return Tag.hr() .. Tag.h3(a) .. e
end,
Produc = compose(nopara, Tag.pre),
producname = prepos("\t", " ::= "),
Or = fixed" | ",
VerBar = fixed"&#124;", -- vertical bar
OrNL = fixed" | \4",
bnfNter = prepos("", ""),
bnfopt = prepos("[", "]"),
bnfrep = prepos("{", "}"),
bnfter = compose(Tag.b, prepos("&lsquo;", "&rsquo;")),
producbody = function (s)
s = string.gsub(s, "%s+", " ")
s = string.gsub(s, "\4", "\n\t\t")
return s
end,
apii = function (s)
local pop,push,err = string.match(s, "^(.-),(.-),(.*)$")
if pop ~= "?" and string.find(pop, "%W") then
pop = "(" .. pop .. ")"
end
if push ~= "?" and string.find(push, "%W") then
push = "(" .. push .. ")"
end
err = (err == "-") and "&ndash;" or Tag.em(err)
return Tag.span(
string.format("[-%s, +%s, %s]", pop, push, err),
{class="apii"}
)
end,
}
local others = prepos("?? "," ??")
local function trata (t)
t = string.gsub(t, "@(%w+)(%b{})", function (w, f)
f = trata(string.sub(f, 2, -2))
if type(Tex[w]) ~= "function" then
io.stderr:write(w .. "\n")
return others(f)
else
return Tex[w](f, w)
end
end)
return t
end
---------------------------------------------------------------------
---------------------------------------------------------------------
-- read whole book
t = io.read"*a"
t = string.gsub(t, "[<>&\128-\255]",
{["<"] = "&lt;",
[">"] = "&gt;",
["&"] = "&amp;",
["\170"] = "&ordf;",
["\186"] = "&ordm;",
["\192"] = "&Agrave;",
["\193"] = "&Aacute;",
["\194"] = "&Acirc;",
["\195"] = "&Atilde;",
["\199"] = "&Ccedil;",
["\201"] = "&Eacute;",
["\202"] = "&Ecirc;",
["\205"] = "&Iacute;",
["\211"] = "&Oacute;",
["\212"] = "&Ocirc;",
["\218"] = "&Uacute;",
["\224"] = "&agrave;",
["\225"] = "&aacute;",
["\226"] = "&acirc;",
["\227"] = "&atilde;",
["\231"] = "&ccedil;",
["\233"] = "&eacute;",
["\234"] = "&ecirc;",
["\237"] = "&iacute;",
["\243"] = "&oacute;",
["\244"] = "&ocirc;",
["\245"] = "&otilde;",
["\250"] = "&uacute;",
["\252"] = "&uuml;"
})
t = string.gsub(t, "\n\n+", "\1")
-- complete macros with no arguments
t = string.gsub(t, "(@%w+)([^{%w])", "%1{}%2")
t = trata(t)
-- correct references
t = string.gsub(t, "\3(.-)\3", ref)
-- remove extra space (??)
t = string.gsub(t, "%s*\4%s*", "")
t = nopara(t)
-- HTML 3.2 does not need </p> (but complains when it is in wrong places :)
t = string.gsub(t, "</p>", "")
io.write(header, t, footer)
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