aclindsa/aedrix-kernel
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Add %b to print() to print integers in binary

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This commit is contained in:
Aaron Lindsay
2012-09-21 11:47:45 -04:00
parent 2bd44726e4
commit 583765fd7c
2 changed files with 13 additions and 0 deletions
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boot/start.s → boot/start.S
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13
kernel/print.c
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@@ -58,6 +58,16 @@ void putx(unsigned int i) {
} }
} }
void putb(unsigned int i) {
int j;
puts("0b");
for (j = 0; j < 32; j++) {
putc((i>>(31-j)) & 1 ? '1' : '0');
}
}
int print(char *fmt, ...) { int print(char *fmt, ...) {
char *c; char *c;
va_list arg; va_list arg;
@@ -81,6 +91,9 @@ int print(char *fmt, ...) {
case 'x': case 'x':
putx(va_arg(arg, unsigned int)); putx(va_arg(arg, unsigned int));
break; break;
case 'b':
putb(va_arg(arg, unsigned int));
break;
default: default:
puts("\nError: print(): Invalid formatting character: '"); puts("\nError: print(): Invalid formatting character: '");
putc(*c); putc(*c);