/// <summary>
/// Will call 'token' for every found token/specifier.
/// First argument is the substring, second argument is true if this is a literal.
/// </summary>
public static void TokenizeFormatString(string format, TokenDelegate token)
{
if (string.IsNullOrEmpty(format))
{
return;
}
bool isQuote = false;
int idx = 0;
int idxStart = 0;
char currentChar = '\0';
for (; idx < format.Length; ++idx)
{
char c = format[idx];
if (idx != idxStart)
{
bool needsFlush = (!isQuote && (c != currentChar || c == '%')) || c == '\'' || c == '\\';
if (needsFlush)
{
token(idxStart, idx - idxStart, isQuote);
idxStart = idx;
}
}
if (c == '\'')
{
isQuote = !isQuote;
idxStart = idx + 1;
continue;
}
if (c == '\\')
{
if (idx == format.Length - 1)
{
throw new FormatException();
}
token(idx + 1, 1, true);
idx += 1;
idxStart = idx + 1;
continue;
}
if (!isQuote && c == '%')
{
if (idx == format.Length - 1)
{
throw new FormatException();
}
token(idx + 1, 1, false);
idx += 1;
idxStart = idx + 1;
continue;
}
currentChar = c;
}
if (isQuote)
{
throw new FormatException();
}
if (idxStart != idx)
{
token(idxStart, idx - idxStart, false);
}
}
/// <summary>
/// Will call 'token' for every found token/specifier.
/// First argument is the substring, second argument is true if this is a literal.
/// </summary>
public static void TokenizeFormatString(string format, TokenDelegate token)
{
if (string.IsNullOrEmpty(format))
return;
bool isQuote = false;
int idx = 0;
int idxStart = 0;
char currentChar = '\0';
for (; idx < format.Length; ++idx)
{
char c = format[idx];
if (idx != idxStart)
{
bool needsFlush = (!isQuote && (c != currentChar || c == '%')) || c == '\'' || c == '\\' ;
if (needsFlush)
{
token(idxStart, idx - idxStart, isQuote);
idxStart = idx;
}
}
if (c == '\'')
{
isQuote = !isQuote;
idxStart = idx + 1;
continue;
}
if (c == '\\')
{
if(idx == format.Length - 1)
throw new FormatException();
token(idx + 1, 1, true);
idx += 1;
idxStart = idx + 1;
continue;
}
if (!isQuote && c == '%')
{
if (idx == format.Length - 1)
throw new FormatException();
token(idx + 1, 1, false);
idx += 1;
idxStart = idx + 1;
continue;
}
currentChar = c;
}
if(isQuote)
throw new FormatException();
if (idxStart != idx)
{
token(idxStart, idx - idxStart, false);
}
}
