On Thursday, 18 October 2012 at 11:26:13 UTC, monarch_dodra wrote:
NOT a final version.
With correct-er utf string support. In theory, non-ascii
characters are illegal, but it makes for safer code, and better
diagnosis.
//----
ubyte[] decode(string s)
{
ubyte[] ret;;
while(s.length)
{
while( s.front == ' ' || s.front == '_' )
{
s.popFront();
if (!s.length) assert(0, text("Premature end of
string."));;
}
dchar c1 = s.front;
if (!std.ascii.isHexDigit(c1)) assert(0, text("Unexpected
character ", c1, "."));
c1 = std.ascii.toUpper(c1);
s.popFront();
if (!s.length) assert(0, text("Premature end of string
after ", c1, "."));
dchar c2 = s.front;
if (!std.ascii.isHexDigit(c2)) assert(0, text("Unexpected
character ", c2, " after ", c1, "."));
c2 = std.ascii.toUpper(c2);
s.popFront();
ubyte val;
if('0' <= c2 && c2 <= '9') val += (c2 - '0');
if('A' <= c2 && c2 <= 'F') val += (c2 - 'A' + 10);
if('0' <= c1 && c1 <= '9') val += ((c1 - '0')*16);
if('A' <= c1 && c1 <= 'F') val += ((c1 - 'A' + 10)*16);
ret ~= val;
}
return ret;
}
//----
