fileSetPos+fileWrite.

[GTX]

How can I write a code with fileSetPos and NOT removing/overwriting further bytes? An example:

I have meta.xml:

  
<meta> 
    <file src="gta_tree_palm2.txd" /> 
    <file src="veg_palm02.dff" /> 
    <file src="music.mp3"></file> 
    <script src="client.lua" type="client"></script> 
    <info gamemodes="race" type="map" name="arr" author="t" version="1.0.0"></info> 
    <map src="arr.map" dimension="0"></map> 
    <settings> 
        <setting name="#skins" value='[ "cj" ]'></setting> 
        <setting name="#maxplayers" value="[ 128 ]"></setting> 
        <setting name="#gamespeed" value="[ 1 ]"></setting> 
        <setting name="#ghostmode" value='[ "true" ]'></setting> 
        <setting name="#time" value="5:20"></setting> 
        <setting name="#vehicleweapons" value='[ "true" ]'></setting> 
        <setting name="#minplayers" value="[ 0 ]"></setting> 
        <setting name="#weather" value="[ 2 ]"></setting> 
        <setting name="#gravity" value="[ 0.008000 ]"></setting> 
        <setting name="#waveheight" value="[ 0 ]"></setting> 
        <setting name="#respawntime" value="[ 5 ]"></setting> 
        <setting name="#locked_time" value="[ true ]"></setting> 
        <setting name="#duration" value="[ 1800 ]"></setting> 
        <setting name="#respawn" value='[ "none" ]'></setting> 
    </settings> 
</meta> 
  

And I want to put the code below after without removing and

  
<script src="common_messages.lua"/> 
<script src="common_messages.lua" type="client"/> 
  

So, it must look like this:

  
<meta> 
    <script src="common_messages.lua"/> 
    <script src="common_messages.lua" type="client"/> 
    <file src="gta_tree_palm2.txd" /> 
    <file src="veg_palm02.dff" /> 
    <file src="music.mp3"></file> 
    <script src="client.lua" type="client"></script> 
    <info gamemodes="race" type="map" name="arr" author="t" version="1.0.0"></info> 
    <map src="arr.map" dimension="0"></map> 
    <settings> 
        <setting name="#skins" value='[ "cj" ]'></setting> 
        <setting name="#maxplayers" value="[ 128 ]"></setting> 
        <setting name="#gamespeed" value="[ 1 ]"></setting> 
        <setting name="#ghostmode" value='[ "true" ]'></setting> 
        <setting name="#time" value="5:20"></setting> 
        <setting name="#vehicleweapons" value='[ "true" ]'></setting> 
        <setting name="#minplayers" value="[ 0 ]"></setting> 
        <setting name="#weather" value="[ 2 ]"></setting> 
        <setting name="#gravity" value="[ 0.008000 ]"></setting> 
        <setting name="#waveheight" value="[ 0 ]"></setting> 
        <setting name="#respawntime" value="[ 5 ]"></setting> 
        <setting name="#locked_time" value="[ true ]"></setting> 
        <setting name="#duration" value="[ 1800 ]"></setting> 
        <setting name="#respawn" value='[ "none" ]'></setting> 
    </settings> 
</meta> 
  

My recent code looks like this:

local file = fileOpen(":"..getResourceName(v).."/".."meta.xml") 
if file then 
    fileSetPos(file, 0) 
    if fileWrite(file, "<meta>", "    \n<script src=\"common_messages.lua\" type=\"client\"/>", "    \n<script src=\"common_messages.lua\" type=\"server\"/>") then 
    end 
    fileClose(file) 
end 

But it overwrites code after tag. (And meta tag itself, but that doesn't matter as I put it in again.)

Any idea? Thanks in advance.

[IIYAMA]

https://wiki.multitheftauto.com/wiki/FileGetSize

and start writing after that.

[ixjf]

Or rather use the XML functions.

[GTX]

Or rather use the XML functions.

If so, how? As far as I know, I can't decide where node will be (I want it at the start).

[Saml1er]

  
function LoadMyFile () 
local pxml = xmlLoadFile(":"..getResourceName(v).."/".."meta.xml") 
if pxml 
    local Xnode = xmlNodeGetChildren(pxml)  
    for _,v in ipairs(Xnode) do 
      if xmlNodeGetName(v) == "script" and xmlNodeGetAttribute(v, "src") == "common_messages.lua" then  
Exist_check = true 
else  
Exist_check = nil 
 end 
    end 
    if not  Exist_check then -- make sure it doesn't exist 
      local Snode = xmlCreateChild(pxml, "script") 
      xmlNodeSetAttribute(Snode, "src", "common_messages.lua") 
      xmlNodeSetAttribute(Snode, "type", "server")  
      xmlSaveFile(pxml) 
        end   
    xmlUnloadFile(pxml) 
            end 
  
LoadMyFile () -- Call the function  

[Alexs]

Or rather use the XML functions.

The file functions are faster than XML functions.

[ixjf]

I think that's a bit obvious. It has to parse the XML file, file functions are for raw editing. Performance vs. readability, elegance and relatively low complexity - the latter clearly wins. You will most certainly not notice the performance impact.

[50p]

In this example, you can read the whole file and store it in a variable. Then use my string function below to add whatever you want, where ever you want. After that write the new string back to the file.

function string.insert( str, val, pos ) -- eg: string.insert( "Hello and welcome", " Boss", 6 ); will return "Hello Boss and welcome" 
    pos = pos or #str; 
    return str:sub(1, pos-1) .. tostring(val) .. str:sub( pos, #str );  
end 

[GTX]

Thanks 50p but I can't store a string into variable. That's because meta.xml has those " in it.

I tried that but it didn't work:

  
if file then 
    fileSetPos(file, 0) 
    local index = 0 
    while string.char(string.byte(fileRead(file, 1))) ~= ">" do 
        index = index + 1 
        fileSetPos(file, index) 
    end 
    fileSetPos(file, index) 
    local buffer = fileRead(file, fileGetSize(file)) 
    if buffer then 
        fileClose(file) 
        fileDelete(":"..getResourceName(v).."/".."meta.xml") 
        local newFile = fileCreate(":"..getResourceName(v).."/".."meta.xml") 
        if fileWrite(newFile, "<meta>", "\n<script src=\"common_messages.lua\" type=\"client\"/>", "\n<script src=\"common_messages.lua\" type=\"server\"/>") then 
        end 
        fileSetPos(newFile, fileGetSize(newFile)) 
        if fileWrite(newFile, buffer) then 
            outputChatBox("Done") 
        end 
    end 
end 
  

[GTX]

I apologize for double post.

I made it working but now it got even worse.

I don't know if this is a bug or what. When I fileWrite a meta and do /refreshall, it says: Couldn't parse meta for etc...

All I know (for now) meta was converted to UNIX (I'm not sure what is it, but I think it is kind of EOL conversion...). Before it was Dos/Windows. (This 'conversions' can be seen in Notepad++).

Wondering now, how to fix that?

[Bonsai]

Why is the position of those nodes important?

Just wondering.

Are you sure its because of some conversion? Have u tried to convert it back in Notepad and check if it works?

Maybe there is just some syntax error.

[GTX]

Nah. I double-triple checked. Working meta is same as non-working meta.

Position of those nodes is important because my common_messages.lua is having wrapper, which disables outputChatBox function.

[Bonsai]

If you use a custom resource loading system couldn't you just pretend its at the first position?

Actually you wouldn't even have to add it to any map then.

Just noticed that other topic about cancel outputChatBox was made by you

[ixjf]

You could rather block all resources from calling outputChatBox except the ones you want, through ACL. I suppose the default group for all resources and users is "Default" - block access to the function:

<right name="function.outputChatBox" access="false"/> 

.. and then add the resources you want to have access to the function to another group that allows access to it.

[GTX]

Alright, I made it working. All I had to do is put \r\n to define new lines. (I think MTA hates Unix EOL conversions at meta). Thank you all for your time.