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lib.b
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lib.b
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char(s, n)
return((s[n/4]>>8*(n%4))&0377); /* s[n/4] */
lchar(s, n, char) {
auto i;
i = 8*(n%4);
char = (char&0377)<<i;
i = inv(0377<<i);
s[(n/4)*4] = s[n/4]&i | char;
}
putchar(char) {
auto c, i;
c = char;
i = 4;
while ((c&0377) != '*e' & (c&0377) != '*0' & i != 0) {
i--;
c =>> 8;
}
write(1, &char, 4-i);
return(char);
}
getchar() {
auto char;
char = 0;
read(1, &char, 1);
return(char);
}
printn(n,b) {
extrn putchar;
auto a;
if (a = n/b)
printn(a, b);
putchar(char("0123456789ABCDEF", n%b));
}
putnumb(n) {
printn(n,10);
putchar('*n');
}
putstr(s) {
auto c, i;
i = 0;
while ((c = char(s,i++)) != '*e')
putchar(c);
}
getstr(s) {
auto c, i;
while ((c = getchar()) != '*n')
lchar(s,i++,c);
lchar(s,i,'*e');
return(s);
}
printf(fmt, x1,x2,x3,x4,x5,x6,x7,x8,x9) {
extrn printn, char, putchar;
auto adx, x, c, i, j;
i = 0;
adx = &x1;
loop:
while((c=char(fmt,i++)) != '%') {
if(c == '*e')
return;
putchar(c);
}
x = *adx++;
switch (c = char(fmt,i++)) {
case 'd':
case 'o':
if(x < 0) {
x = -x;
putchar('-');
}
printn(x, c=='o'?8:10);
goto loop;
case 'x':
if(x < 0) {
x = -x;
putchar('-');
}
printn(x, 16);
goto loop;
case 'c':
putchar(x);
goto loop;
case 's':
j = 0;
while((c=char(x,j++)) != '*e')
putchar(c);
goto loop;
}
putchar('%');
i--;
adx--;
goto loop;
}