判断一个char[]里是否包含两个连续的\r\n
public static int ContainsHeaderEndToken(char[] chars, int start, int end) {
bool secondBackslashN = false;
bool firstBackslashR = false;
char expectNextChar = '\r';
for (int i = start; i < end; i++) {
if (firstBackslashR && chars[i] != expectNextChar)
{
firstBackslashR = false;
}
if (chars[i] != expectNextChar) continue;
if (expectNextChar == '\r')
{
firstBackslashR = true;
expectNextChar = '\n';
continue;
}
if(expectNextChar == '\n')
{
if(!secondBackslashN)
{
expectNextChar = '\r';
secondBackslashN = true;
continue;
}
return i-4;
}
}
return -1;
}
bool secondBackslashN = false;
bool firstBackslashR = false;
char expectNextChar = '\r';
for (int i = start; i < end; i++) {
if (firstBackslashR && chars[i] != expectNextChar)
{
firstBackslashR = false;
}
if (chars[i] != expectNextChar) continue;
if (expectNextChar == '\r')
{
firstBackslashR = true;
expectNextChar = '\n';
continue;
}
if(expectNextChar == '\n')
{
if(!secondBackslashN)
{
expectNextChar = '\r';
secondBackslashN = true;
continue;
}
return i-4;
}
}
return -1;
}