ddnet/src/engine/shared/config.cpp

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/* (c) Magnus Auvinen. See licence.txt in the root of the distribution for more information. */
/* If you are missing that file, acquire a complete release at teeworlds.com. */
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#include <engine/config.h>
#include <engine/shared/config.h>
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#include <engine/shared/protocol.h>
#include <engine/storage.h>
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CConfiguration g_Config;
class CConfig : public IConfig
{
IStorage *m_pStorage;
IOHANDLE m_ConfigFile;
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bool m_Failed;
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struct CCallback
{
SAVECALLBACKFUNC m_pfnFunc;
void *m_pUserData;
};
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enum
{
MAX_CALLBACKS = 16
};
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CCallback m_aCallbacks[MAX_CALLBACKS];
int m_NumCallbacks;
void EscapeParam(char *pDst, const char *pSrc, int Size)
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{
str_escape(&pDst, pSrc, pDst + Size);
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}
public:
CConfig()
{
m_ConfigFile = 0;
m_NumCallbacks = 0;
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m_Failed = false;
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}
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virtual void Init()
{
m_pStorage = Kernel()->RequestInterface<IStorage>();
Reset();
}
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virtual void Reset()
{
#define MACRO_CONFIG_INT(Name, ScriptName, def, min, max, flags, desc) g_Config.m_##Name = def;
#define MACRO_CONFIG_COL(Name, ScriptName, def, flags, desc) MACRO_CONFIG_INT(Name, ScriptName, def, 0, 0, flags, desc)
#define MACRO_CONFIG_STR(Name, ScriptName, len, def, flags, desc) str_copy(g_Config.m_##Name, def, len);
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#include "config_variables.h"
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#undef MACRO_CONFIG_INT
#undef MACRO_CONFIG_COL
#undef MACRO_CONFIG_STR
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}
virtual bool Save()
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{
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if(!m_pStorage || !g_Config.m_ClSaveSettings)
return true;
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char aConfigFileTmp[64];
str_format(aConfigFileTmp, sizeof(aConfigFileTmp), CONFIG_FILE ".%d.tmp", pid());
m_ConfigFile = m_pStorage->OpenFile(aConfigFileTmp, IOFLAG_WRITE, IStorage::TYPE_SAVE);
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if(!m_ConfigFile)
{
dbg_msg("config", "ERROR: opening %s failed", aConfigFileTmp);
return false;
}
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m_Failed = false;
char aLineBuf[1024 * 2];
char aEscapeBuf[1024 * 2];
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#define MACRO_CONFIG_INT(Name, ScriptName, def, min, max, flags, desc) \
if((flags)&CFGFLAG_SAVE && g_Config.m_##Name != def) \
{ \
str_format(aLineBuf, sizeof(aLineBuf), "%s %i", #ScriptName, g_Config.m_##Name); \
WriteLine(aLineBuf); \
}
#define MACRO_CONFIG_COL(Name, ScriptName, def, flags, desc) \
if((flags)&CFGFLAG_SAVE && g_Config.m_##Name != def) \
{ \
str_format(aLineBuf, sizeof(aLineBuf), "%s %u", #ScriptName, g_Config.m_##Name); \
WriteLine(aLineBuf); \
}
#define MACRO_CONFIG_STR(Name, ScriptName, len, def, flags, desc) \
if((flags)&CFGFLAG_SAVE && str_comp(g_Config.m_##Name, def) != 0) \
{ \
EscapeParam(aEscapeBuf, g_Config.m_##Name, sizeof(aEscapeBuf)); \
str_format(aLineBuf, sizeof(aLineBuf), "%s \"%s\"", #ScriptName, aEscapeBuf); \
WriteLine(aLineBuf); \
}
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#include "config_variables.h"
#undef MACRO_CONFIG_INT
#undef MACRO_CONFIG_COL
#undef MACRO_CONFIG_STR
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for(int i = 0; i < m_NumCallbacks; i++)
m_aCallbacks[i].m_pfnFunc(this, m_aCallbacks[i].m_pUserData);
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if(io_close(m_ConfigFile) != 0)
m_Failed = true;
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m_ConfigFile = 0;
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if(m_Failed)
{
dbg_msg("config", "ERROR: writing to %s failed", aConfigFileTmp);
return false;
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}
if(!m_pStorage->RenameFile(aConfigFileTmp, CONFIG_FILE, IStorage::TYPE_SAVE))
{
dbg_msg("config", "ERROR: renaming %s to " CONFIG_FILE " failed", aConfigFileTmp);
return false;
}
return true;
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}
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virtual void RegisterCallback(SAVECALLBACKFUNC pfnFunc, void *pUserData)
{
dbg_assert(m_NumCallbacks < MAX_CALLBACKS, "too many config callbacks");
m_aCallbacks[m_NumCallbacks].m_pfnFunc = pfnFunc;
m_aCallbacks[m_NumCallbacks].m_pUserData = pUserData;
m_NumCallbacks++;
}
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virtual void WriteLine(const char *pLine)
{
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if(!m_ConfigFile ||
io_write(m_ConfigFile, pLine, str_length(pLine)) != static_cast<unsigned>(str_length(pLine)) ||
#if defined(CONF_FAMILY_WINDOWS)
io_write_newline(m_ConfigFile) != 2)
#else
io_write_newline(m_ConfigFile) != 1)
#endif
m_Failed = true;
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}
};
IConfig *CreateConfig() { return new CConfig; }