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#include "common.hh"
static int g_LastStatusRefresh;
static char g_StatusString[KB(2)];
struct XMLBuffer{
char *Data;
int Size;
int Position;
};
static void XMLNullTerminate(XMLBuffer *Buffer){
ASSERT(Buffer->Size > 0);
if(Buffer->Position < Buffer->Size){
Buffer->Data[Buffer->Position] = 0;
}else{
Buffer->Data[Buffer->Size - 1] = 0;
}
}
static void XMLAppendChar(XMLBuffer *Buffer, char Ch){
if(Buffer->Position < Buffer->Size){
Buffer->Data[Buffer->Position] = Ch;
}
Buffer->Position += 1;
}
static void XMLAppendNumber(XMLBuffer *Buffer, int64 Num){
if(Num == 0){
XMLAppendChar(Buffer, '0');
return;
}
if(Num < 0){
XMLAppendChar(Buffer, '-');
Num = -Num;
}
char String[64] = {};
int StringLen = 0;
while(Num > 0){
ASSERT(StringLen < (int)sizeof(String));
String[StringLen] = (Num % 10) + '0';
Num = (Num / 10);
StringLen += 1;
}
for(int i = 0; i < StringLen; i += 1){
XMLAppendChar(Buffer, String[(StringLen - 1) - i]);
}
}
static void XMLAppendString(XMLBuffer *Buffer, const char *String){
const char *P = String;
while(P[0]){
XMLAppendChar(Buffer, P[0]);
P += 1;
}
}
static void XMLAppendStringEscaped(XMLBuffer *Buffer, const char *String){
const char *P = String;
while(P[0]){
switch(P[0]){
case '\t': XMLAppendString(Buffer, "	"); break;
case '\n': XMLAppendString(Buffer, " "); break;
case '"': XMLAppendString(Buffer, """); break;
case '&': XMLAppendString(Buffer, "&"); break;
case '\'': XMLAppendString(Buffer, "'"); break;
case '<': XMLAppendString(Buffer, "<"); break;
case '>': XMLAppendString(Buffer, ">"); break;
default: XMLAppendChar(Buffer, P[0]); break;
}
P += 1;
}
}
static void XMLAppendStringFV(XMLBuffer *Buffer, const char *Format, va_list Args){
const char *P = Format;
while(P[0]){
// IMPORTANT(fusion): This function only implements a small subset of
// the printf syntax.
if(P[0] == '%'){
P += 1;
// IMPORTANT(fusion): Small integral parameters such as char and short
// are promoted to int, similar to how they're promoted in arithmetic
// operations. This means there are only really 4 and 8 bytes integers.
int Length = 4;
if(P[0] == 'h' && P[1] == 'h'){
P += 2;
}else if(P[0] == 'l' && P[1] == 'l'){
Length = 8;
P += 2;
}else if(P[0] == 'h'){
P += 1;
}else if(P[0] == 'l'){
Length = 8;
P += 1;
}
switch(P[0]){
case '%':{
XMLAppendChar(Buffer, '%');
break;
}
case 'c':{
int Ch = va_arg(Args, int);
XMLAppendChar(Buffer, (char)Ch);
break;
}
case 'd':{
int64 Num = (Length == 4 ? va_arg(Args, int) : va_arg(Args, int64));
XMLAppendNumber(Buffer, Num);
break;
}
case 's':{
const char *String = va_arg(Args, const char*);
XMLAppendStringEscaped(Buffer, String);
break;
}
default:{
LOG_ERR("Invalid XML format specifier \"%c\"", P[0]);
break;
}
}
if(P[0]){
P += 1;
}
}else{
XMLAppendChar(Buffer, P[0]);
P += 1;
}
}
}
static void XMLAppendStringF(XMLBuffer *Buffer, const char *Format, ...){
va_list Args;
va_start(Args, Format);
XMLAppendStringFV(Buffer, Format, Args);
va_end(Args);
}
const char *GetStatusString(void){
int TimeNow = (int)time(NULL);
if((TimeNow - g_LastStatusRefresh) >= g_Config.MinStatusInterval){
const char *WorldName = "";
int Uptime = 0;
int NumPlayers = 0;
int MaxPlayers = 0;
int OnlinePeak = 0;
TWorld World = {};
if(GetWorld(g_Config.StatusWorld, &World) == 0){
WorldName = World.Name;
if(World.LastStartup != 0 && World.LastStartup > World.LastShutdown){
Uptime = TimeNow - World.LastStartup;
}
NumPlayers = World.NumPlayers;
MaxPlayers = World.MaxPlayers;
OnlinePeak = World.OnlinePeak;
// IMPORTANT(fusion): This could be a common behaviour but, on OTSERVLIST,
// the server will show as OFFLINE if the the online peak is less than
// the number of online players. This shouldn't usually be a problem since
// the online character list and online peak are updated together in the
// same CREATE_PLAYERLIST query, but is something to keep in mind.
if(OnlinePeak < NumPlayers){
OnlinePeak = NumPlayers;
}
}else{
LOG_ERR("Failed to query world data...");
}
// NOTE(fusion): Skip line with MOTD hash.
const char *Motd = g_Config.Motd;
while(Motd[0]){
if(Motd[0] == '\n'){
Motd += 1;
break;
}
Motd += 1;
}
XMLBuffer Buffer = {};
Buffer.Data = g_StatusString;
Buffer.Size = sizeof(g_StatusString);
XMLAppendString(&Buffer, "<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
XMLAppendString(&Buffer, "<tsqp version=\"1.0\">");
XMLAppendStringF(&Buffer,
"<serverinfo servername=\"%s\" uptime=\"%d\" url=\"%s\""
" location=\"%s\" server=\"%s\" version=\"%s\""
" client=\"%s\"/>",
WorldName, Uptime, g_Config.Url, g_Config.Location,
g_Config.ServerType, g_Config.ServerVersion,
g_Config.ClientVersion);
XMLAppendStringF(&Buffer,
"<players online=\"%d\" max=\"%d\" peak=\"%d\"/>",
NumPlayers, MaxPlayers, OnlinePeak);
XMLAppendStringF(&Buffer, "<motd>%s</motd>", Motd);
XMLAppendString(&Buffer, "</tsqp>");
XMLNullTerminate(&Buffer);
g_LastStatusRefresh = TimeNow;
}
return g_StatusString;
}
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