public static P5Scalar BitAnd(Runtime runtime, P5Scalar res,
P5Scalar a, P5Scalar b)
{
if (a.IsString(runtime) && b.IsString(runtime))
{
string sa = a.AsString(runtime), sb = b.AsString(runtime);
System.Text.StringBuilder t;
if (sa.Length > sb.Length)
{
t = new System.Text.StringBuilder(sa);
for (int i = 0; i < sb.Length; ++i)
t[i] &= sb[i];
}
else
{
t = new System.Text.StringBuilder(sb);
for (int i = 0; i < sa.Length; ++i)
t[i] &= sa[i];
}
res.SetString(runtime, t.ToString());
}
else
{
// TODO take into account signed/unsigned?
res.SetInteger(runtime, a.AsInteger(runtime) & b.AsInteger(runtime));
}
return res;
}
public static int Transliterate(Runtime runtime, P5Scalar scalar,
string match, string replacement,
int flags)
{
bool complement = (flags & Opcode.FLAG_RX_COMPLEMENT) != 0;
bool delete = (flags & Opcode.FLAG_RX_DELETE) != 0;
bool squeeze = (flags & Opcode.FLAG_RX_SQUEEZE) != 0;
var s = scalar.AsString(runtime);
int count = 0, last_r = -1;
var new_str = new System.Text.StringBuilder();
for (int i = 0; i < s.Length; ++i)
{
int idx = match.IndexOf(s[i]);
int replace = s[i];
if (idx == -1 && complement)
{
if (delete)
replace = -1;
else if (replacement.Length > 0)
replace = replacement[replacement.Length - 1];
if (last_r == replace && squeeze)
replace = -1;
else
last_r = replace;
count += 1;
}
else if (idx != -1 && !complement)
{
if (idx >= replacement.Length && delete)
replace = -1;
else if (idx >= replacement.Length)
replace = replacement[replacement.Length - 1];
else if (idx < replacement.Length)
replace = replacement[idx];
if (last_r == replace && squeeze)
replace = -1;
else
last_r = replace;
count += 1;
}
else
last_r = -1;
if (replace != -1)
new_str.Append((char)replace);
}
scalar.SetString(runtime, new_str.ToString());
return count;
}
public static void ReplaceSubstrings(Runtime runtime, P5Scalar value,
string str,
List<RxReplacement> substrings)
{
for (int i = substrings.Count - 1; i >= 0; --i)
{
// TODO optimize
str = str.Substring(0, substrings[i].Start)
+ substrings[i].String + str.Substring(substrings[i].End);
}
value.SetString(runtime, str);
}
