From b72837827d9290c7ec50b9e4b9e1a0f194ddccca Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sat, 17 Jul 2021 09:11:12 +0200
Subject: Adding upstream version 1.2.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 include/dnsjit/lib/parseconf.lua | 181 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 181 insertions(+)
 create mode 100644 include/dnsjit/lib/parseconf.lua

(limited to 'include/dnsjit/lib/parseconf.lua')

diff --git a/include/dnsjit/lib/parseconf.lua b/include/dnsjit/lib/parseconf.lua
new file mode 100644
index 0000000..638763b
--- /dev/null
+++ b/include/dnsjit/lib/parseconf.lua
@@ -0,0 +1,181 @@
+-- Copyright (c) 2018-2021, OARC, Inc.
+-- All rights reserved.
+--
+-- This file is part of dnsjit.
+--
+-- dnsjit is free software: you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation, either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- dnsjit is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with dnsjit.  If not, see <http://www.gnu.org/licenses/>.
+
+-- dnsjit.lib.parseconf
+-- Parse simple config files
+--   local conf = require("dnsjit.lib.parseconf").new()
+-- .
+--   conf:func("config_name", function(k,...)
+--       print(k,...)
+--   end)
+-- .
+--   conf:file(file)
+-- .
+--   print(conf:val("another_config_name"))
+--
+-- This module parses simple config files that are based on the config
+-- syntax of DSC, drool and parseconf helper library.
+-- Each config begins with a
+-- .B name
+-- followed by
+-- .B options
+-- and ends with a
+-- .BR ; .
+-- Multiple configs can be given on the same line.
+-- Valid option types are
+-- .IR number ,
+-- .IR float ,
+-- .IR string ,
+-- .IR "quoted string" .
+-- Comments can be added by prefixing the comment with
+-- .BR # .
+-- .SS Example
+--   # Comment
+--   number 12345;
+--   float 123.456;
+--   string string string;
+--   quoted_string "string string string";
+--   multi config; on one line;
+module(...,package.seeall)
+
+local log = require("dnsjit.core.log")
+
+local module_log = log.new("lib.parseconf")
+Parseconf = {}
+
+-- Create a new Parseconf object.
+function Parseconf.new()
+    local self = setmetatable({
+        conf = {},
+        cf = {},
+        _log = log.new("lib.parseconf", module_log),
+    }, { __index = Parseconf })
+
+    self._log:debug("new()")
+
+    return self
+end
+
+-- Return the Log object to control logging of this instance or module.
+function Parseconf:log()
+    if self == nil then
+        return module_log
+    end
+    return self._log
+end
+
+-- Set a function to call when config
+-- .I name
+-- is found.
+function Parseconf:func(name, func)
+    self.cf[name] = func
+end
+
+function Parseconf:part(l, n)
+    local p
+    p = l:match("^(%d+)[%s;]", n)
+    if p then
+        return p, tonumber(p)
+    end
+    p = l:match("^(%d+%.%d+)[%s;]", n)
+    if p then
+        return p, tonumber(p)
+    end
+    p = l:match("^(\"[^\"]+\")[%s;]", n)
+    if p then
+        return p, p:sub(2, -2)
+    end
+    p = l:match("^([^%s;]+)[%s;]", n)
+    if p then
+        return p, p
+    end
+end
+
+function Parseconf:next(l, n)
+    local eol = l:match("^%s*;%s*", n)
+    if eol then
+        return true, eol
+    end
+    local ws = l:match("^%s+", n)
+    if ws then
+        return ws
+    end
+    return false
+end
+
+-- Parse the given file.
+function Parseconf:file(fn)
+    local ln, l
+    ln = 1
+    for l in io.lines(fn) do
+        local c = l:find("#")
+        if c then
+            l = l:sub(1, c - 1)
+        end
+        local e, m = pcall(self.line, self, l)
+        if e == false then
+            error("parse error in "..fn.."["..ln.."]: "..m)
+        end
+        ln = ln + 1
+    end
+end
+
+-- Parse the given line.
+function Parseconf:line(l)
+    local n
+    n = 1
+    while n <= l:len() do
+        local c = nil
+        local va = {}
+        while true do
+            local p, v = self:part(l, n)
+            if not p then
+                error("invalid config at character "..n..": "..l:sub(n))
+            end
+            if not c then
+                c = p
+            else
+                table.insert(va, v)
+            end
+            n = n + p:len()
+            local ws, eol = self:next(l, n)
+            if ws == true then
+                if eol then
+                    n = n + eol:len()
+                end
+                break
+            elseif ws == false then
+                error("invalid config at character "..n..": "..l:sub(n))
+            end
+            n = n + ws:len()
+        end
+        if self.cf[c] then
+            self.cf[c](c, unpack(va))
+        else
+            self.conf[c] = va
+        end
+    end
+end
+
+-- Get the value of a config
+-- .IR name .
+function Parseconf:val(name)
+    return self.conf[name]
+end
+
+return Parseconf
-- 
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