private static int GetTypeLength(string input, int offset, out StringSegment type)
{
if (offset < 0 || offset >= input.Length)
{
type = default(StringSegment);
return(0);
}
var current = offset + HttpTokenParsingRules.GetWhitespaceLength(input, offset);
var typeLength = HttpTokenParsingRules.GetTokenLength(input, current);
if (typeLength == 0)
{
type = default(StringSegment);
return(0);
}
type = new StringSegment(input, current, typeLength);
current += typeLength;
current += HttpTokenParsingRules.GetWhitespaceLength(input, current);
return(current - offset);
}
private static int GetValueLength(string input, int startIndex, out StringSegment value)
{
var current = startIndex;
current++;
current += HttpTokenParsingRules.GetWhitespaceLength(input, current);
var valueLength = HttpTokenParsingRules.GetTokenLength(input, current);
if (valueLength == 0)
{
var result = HttpTokenParsingRules.GetQuotedStringLength(input, current, out valueLength);
if (result != HttpParseResult.Parsed)
{
value = default(StringSegment);
return(0);
}
value = new StringSegment(input, current + 1, valueLength - 2);
}
else
{
value = new StringSegment(input, current, valueLength);
}
current += valueLength;
current += HttpTokenParsingRules.GetWhitespaceLength(input, current);
return(current - startIndex);
}
private static int GetSubtypeLength(string input, int offset, out StringSegment subType)
{
var current = offset;
if (current < 0 || current >= input.Length || input[current] != '/')
{
subType = default(StringSegment);
return(0);
}
current++; // skip delimiter.
current += HttpTokenParsingRules.GetWhitespaceLength(input, current);
var subtypeLength = HttpTokenParsingRules.GetTokenLength(input, current);
if (subtypeLength == 0)
{
subType = default(StringSegment);
return(0);
}
subType = new StringSegment(input, current, subtypeLength);
current += subtypeLength;
current += HttpTokenParsingRules.GetWhitespaceLength(input, current);
return(current - offset);
}
private static int GetNameLength(string input, int startIndex, out StringSegment name)
{
var current = startIndex;
current++; // skip ';'
current += HttpTokenParsingRules.GetWhitespaceLength(input, current);
var nameLength = HttpTokenParsingRules.GetTokenLength(input, current);
if (nameLength == 0)
{
name = default(StringSegment);
return(0);
}
name = new StringSegment(input, current, nameLength);
current += nameLength;
current += HttpTokenParsingRules.GetWhitespaceLength(input, current);
return(current - startIndex);
}