Return to debug.c CVS log

Up to [Research Unix] / researchv9 / libc / gen

Annotation of researchv9/libc/gen/debug.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Scaled down version of C Library printf.
        !             3:  * Only %s %u %d (==%u) %o %x %D are recognized.
        !             4:  * Used to print diagnostic information
        !             5:  * directly on console tty.
        !             6:  * Since it is not interrupt driven,
        !             7:  * all system activities are pretty much
        !             8:  * suspended.
        !             9:  * Printf should not be used for chit-chat.
        !            10:  */
        !            11: /* VARARGS1 */
        !            12: _printf(fmt, x1)
        !            13: register char *fmt;
        !            14: unsigned x1;
        !            15: {
        !            16:        register c;
        !            17:        register unsigned *adx;
        !            18:        char *s;
        !            19: 
        !            20:        adx = &x1;
        !            21: loop:
        !            22:        while((c = *fmt++) != '%') {
        !            23:                if(c == '\0')
        !            24:                        return;
        !            25:                _putchar(c);
        !            26:        }
        !            27:        c = *fmt++;
        !            28:        if(c == 'd' || c == 'u' || c == 'o' || c == 'x')
        !            29:                _printn((long)*adx, c=='o'? 8: (c=='x'? 16:10));
        !            30:        else if(c == 's') {
        !            31:                s = (char *)*adx;
        !            32:                while(c = *s++)
        !            33:                        _putchar(c);
        !            34:                adx++;
        !            35:        } else if (c=='D' || c=='O' || c =='X') {
        !            36:                _printn(*(long *)adx, c=='O'? 8: (c=='X'? 16:10));
        !            37:                adx += (sizeof(long) / sizeof(int)) - 1;
        !            38:        }
        !            39:        adx++;
        !            40:        goto loop;
        !            41: }
        !            42: 
        !            43: /*
        !            44:  * Print an unsigned integer in base b.
        !            45:  */
        !            46: _printn(n, b)
        !            47: long n;
        !            48: {
        !            49:        register long a;
        !            50: 
        !            51:        if (n<0) {      /* shouldn't happen */
        !            52:                _putchar('-');
        !            53:                n = -n;
        !            54:        }
        !            55:        if(a = n/b)
        !            56:                _printn(a, b);
        !            57:        _putchar("0123456789ABCDEF"[(int)(n%b)]);
        !            58: }
        !            59: 
        !            60: _putchar(c)
        !            61: char c;
        !            62: {
        !            63:        write(1,&c,1);
        !            64: }

This archive runs on limited infrastructure. Preserving old code on modern bandwidth. Automated agents are requested to crawl responsibly.