[SOURCE]Protección contra los nombres inapropriados

Create.h:
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#pragma once

namespace Programador
{
struct PMSG_CHARCREATE
{
PBMSG_HEAD h;
BYTE subcode;
char Name[10];
BYTE ClassSkin;
};

struct PMSG_GUILDINFOSAVE
{
PBMSG_HEAD h;
BYTE btGuildType;
char GuildName[8];
BYTE Mark[32];
};

class Create
{
public:
static bool checkString(std::string szString, std::string szPattern, bool szIgnoreSpace);
static void Character(PMSG_CHARCREATE* lpMsg, DWORD dwIndex);
static void Guild(DWORD dwIndex, PMSG_GUILDINFOSAVE* lpMsg);
};
}
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Create.cpp:
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#include "Create.h"

namespace Programador
{
bool Create::checkString(std::string szString, std::string szPattern, bool szIgnoreSpace)
{
DWORD dwCount = 0;
std::string szReg = "", szCharacter = "";

if(szPattern[0] != '[' || szPattern[(szPattern.length() - 1)] != ']')
{
return false;
}

for(int i = 1; i < (int)szPattern.length(); i++)
{
if(szPattern[i] == ']')
{
if(!szReg.empty())
{
szCharacter += szReg;
}

break;
}

if(!szPattern.compare(i, 3, "A-Z"))
{
szCharacter += "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
i += 2;
}
else if(!szPattern.compare(i, 3, "a-z"))
{
szCharacter += "abcdefghijklmnopqrstuvwxyz";
i += 2;
}
else if(!szPattern.compare(i, 3, "0-9"))
{
szCharacter += "0123456789";
i += 2;
}
else
{
szReg += szPattern[i];
}
}

for(int n = 0; n < (int)szString.length(); n++)
{
if(szString[n] == ' ' && szIgnoreSpace)
{
dwCount++;
continue;
}

for(int y = 0; y < (int)szCharacter.length(); y++)
{
if(szString[n] == szCharacter[y])
{
dwCount++;
break;
}
}
}

if(dwCount == (DWORD)szString.length())
{
return true;
}

return false;
}

void Create::Character(PMSG_CHARCREATE* lpMsg, DWORD dwIndex)
{
if(checkString(lpMsg->Name, "[A-Za-z0-9_-]", false))
{
ServerCharacterFailSend(dwIndex, lpMsg->Name);
return;
}

ServerCreateCharacter(lpMsg, dwIndex);
}

void Create::Guild(DWORD dwIndex, PMSG_GUILDINFOSAVE* lpMsg)
{
if(checkString(lpMsg->GuildName, "[A-Za-z0-9_-]", false))
{
return;
}

ServerCreateGuild(dwIndex, lpMsg);
}
}--------------------------------------------------------------------------------------------