概要
cscの作法、調べてみた。
練習問題やってみた。
練習問題
俺言語インタープリタを作れ。
写真
サンプルコード
using System;
using System.Windows.Forms;
using System.Drawing;
class form1: Form {
TextBox bo1;
byte[] ram = new byte[256];
byte Rmd = 233; // random no address
byte Bnd = 234; // line no saigo no address
byte Pcc = 235; // program counter no address
byte Lbf = 237; // buf no saisyo
byte Ptr; // genzaino pointer
byte Cur; // line pointer
byte c; // atai
byte adr; // ver no address
byte adr2; // ver2 no address
byte val; // var no atai
form1() {
Text = "oregengo";
ClientSize = new Size(400, 600);
bo1 = new TextBox();
bo1.Location = new Point(50, 50);
bo1.Width = 300;
bo1.Height = 450;
bo1.Multiline = true;
bo1.Text = "10 a=1\r\n30 b=a/15\r\n40 #=%=0*120\r\n50 b=a/5\r\n60 #=%=0*140\r\n70 b=a/3\r\n80 #=%=0*160\r\n90 ?=a\r\n100 #=a<100*180\r\n110 #=300\r\n120 ?=\"fizzbuzz \"\r\n130 #=180\r\n140 ?=\"buzz \"\r\n150 #=180\r\n160 ?=\"fizz \"\r\n180 a=a+1\r\n190 #=30\r\n#=1\r\n";
Controls.AddRange(new Control[] {
bo1
});
Button btn1 = new Button();
btn1.Location = new Point(50, 20);
btn1.Text = "run";
btn1.Click += btn1_Click;
Controls.AddRange(new Control[] {
btn1
});
}
void btn1_Click(object sender, System.EventArgs e) {
run();
}
byte READB(byte adr) {
byte v = ram[adr];
return v;
}
void WRITEB(byte adr, byte data) {
ram[adr] = data;
}
void putchar(byte b) {
char c = Convert.ToChar(b);
bo1.Text += c;
}
void put(byte b) {
bo1.Text += b + " ";
}
void crlf() {
putchar(Convert.ToByte('\r'));
putchar(Convert.ToByte('\n'));
}
byte putl(byte pt, byte d) {
while (READB(pt) != d)
{
putchar(READB(pt++));
}
return pt;
}
void putlp(byte d) {
while (READB(Ptr) != d)
{
putchar(READB(Ptr++));
}
}
void term() {
byte cc;
cc = READB(Ptr++);
byte val2 = val;
factr();
if (cc == Convert.ToByte('*'))
{
val = Convert.ToByte(val2 * val);
}
else if (cc == Convert.ToByte('+'))
{
val = Convert.ToByte(val2 + val);
}
else if (cc == Convert.ToByte('-'))
{
val = Convert.ToByte(val2 - val);
}
else if (cc == Convert.ToByte('/'))
{
WRITEB(Rmd, Convert.ToByte(val2 % val));
val = Convert.ToByte(val2 / val);
}
else if (cc == Convert.ToByte('='))
{
if (val2 == val) val = 1;
else val = 0;
}
else if (cc == Convert.ToByte('^'))
{
val = Convert.ToByte(val2 ^ val);
}
else if (cc == Convert.ToByte('&'))
{
val = Convert.ToByte(val2 & val);
}
else if (cc == Convert.ToByte('|'))
{
val = Convert.ToByte(val2 | val);
}
else if (cc == Convert.ToByte('>'))
{
if (val2 >= val) val = 1;
else val = 0;
}
else
{
if (val2 < val) val = 1;
else val = 0;
}
}
void factr() {
byte cc;
if (READB(Ptr) == Convert.ToByte('\0'))
{
val = 0;
return;
}
if (getnm2()) return;
cc = READB(Ptr++);
if (cc == Convert.ToByte('$'))
{
Random r = new Random();
val = Convert.ToByte(r.Next(10));
}
else if (cc == Convert.ToByte(':'))
{
val = Convert.ToByte('\t');
}
else if (cc == Convert.ToByte(';'))
{
val = Convert.ToByte('\n');
}
else
{
Ptr--;
getvr2();
val = READB(adr2);
Ptr++;
}
}
void expr() {
byte cc;
factr();
while ((cc = READB(Ptr)) != Convert.ToByte('\0'))
{
term();
}
Ptr++;
}
void getvr2() {
byte cc = READB(Ptr);
if (cc == Convert.ToByte('a')) adr2 = 230;
else if (cc == Convert.ToByte('#')) adr2 = Pcc;
else if (cc == Convert.ToByte('b')) adr2 = 231;
else if (cc == Convert.ToByte('c')) adr2 = 232;
else if (cc == Convert.ToByte('%')) adr2 = Rmd;
else adr2 = 230;
}
void getvr() {
c = READB(Ptr);
if (c == Convert.ToByte('a')) adr = 230;
else if (c == Convert.ToByte('#')) adr = Pcc;
else if (c == Convert.ToByte('b')) adr = 231;
else if (c == Convert.ToByte('c')) adr = 232;
else adr = 230;
}
void ordr() {
getvr();
Ptr++;
Ptr++;
if (READB(Ptr) == Convert.ToByte('"'))
{
Ptr++;
putlp(Convert.ToByte('"'));
}
else
{
expr();
if (c == Convert.ToByte('$'))
{
}
else if (c == Convert.ToByte('?'))
{
put(val);
}
else
{
WRITEB(adr, val);
}
}
}
byte nxtln(byte pt) {
for (pt += 1; READB(pt++) != Convert.ToByte('\0'););
return pt;
}
bool fndln() {
for (Cur = 0; Cur != READB(Bnd); Cur = nxtln(Cur))
{
if (READB(Cur) == READB(Pcc)) return true;
}
return false;
}
bool nxline() {
for (Cur = 0; Cur != READB(Bnd); Cur = nxtln(Cur))
{
if (READB(Cur) > READB(Pcc)) return true;
}
return false;
}
bool num() {
if (48 <= (READB(Ptr)) && (READB(Ptr)) <= 57) return true;
else return false;
}
bool getnm2() {
byte ch;
if (!num()) return false;
byte n = 0;
do
{
n *= 10;
ch = READB(Ptr++);
n += Convert.ToByte(ch - 48);
} while (num());
val = n;
return true;
}
void run() {
WRITEB(Bnd, 0);
byte i;
byte j;
string str = bo1.Text;
string[] lines = str.Split(new string[] {
"\r\n"
}, StringSplitOptions.None);
for (i = 0; i < lines.Length; i++)
{
if (lines[i].Length < 1) break;
Ptr = Lbf;
for (j = 0; j < lines[i].Length; j++)
{
WRITEB(Ptr++, Convert.ToByte(lines[i][j]));
}
WRITEB(Ptr++, Convert.ToByte('\0'));
byte ima = 0;
Ptr = Lbf;
if (!getnm2())
{
Ptr = Lbf;
WRITEB(Pcc, 0);
for ( ; ; )
{
ima = READB(Pcc);
ordr();
if (READB(Pcc) == 0 && ima == 0)
{
break;
}
else
{
if (READB(Pcc) == 0) WRITEB(Pcc, ima);
if (READB(Pcc) == 1) ima = 1;
if (READB(Pcc) == ima)
{
if (nxline())
{
WRITEB(Pcc, READB(Cur));
Ptr = Convert.ToByte(Cur + 2);
}
else
{
break;
}
}
else
{
if (fndln())
{
WRITEB(Pcc, READB(Cur));
Ptr = Convert.ToByte(Cur + 2);
}
else
{
break;
}
}
}
}
}
else
{
if (val == 0)
{
byte pt;
for (pt = 0; pt < READB(Bnd); pt++)
{
put(READB(pt));
pt += 1;
pt = putl(pt, Convert.ToByte('\0'));
crlf();
}
}
else
{
byte src,
dst,
m,
h;
byte f = 0;
WRITEB(Pcc, val);
if (fndln())
{
src = nxtln(Cur);
for (dst = Cur; src != READB(Bnd); dst++, src++)
{
WRITEB(dst, READB(src));
}
WRITEB(Bnd, dst);
}
if (nxline())
{
f = 1;
}
src = READB(Bnd);
for (m = 2, h = Ptr; READB(h) != Convert.ToByte('\0'); m++)
{
h++;
}
if (m > 2)
{
WRITEB(Bnd, Convert.ToByte(src + m));
if (f == 1)
{
Cur--;
for (dst = READB(Bnd); src != Cur; dst--, src--)
{
WRITEB(dst, READB(src));
}
src++;
}
WRITEB(src, val);
src += 1;
byte k;
for (k = 1; k < m; k++)
{
WRITEB(src++, READB(Ptr++));
}
}
}
}
}
}
[STAThread]
public static void Main() {
Application.Run(new form1());
}
}
以上。