| 0,0 → 1,160 |
|---|
| /* |
| * Copyright (C) 2001-2004 Jakub Jermar |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * - Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * - The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| #include <putchar.h> |
| #include <print.h> |
| #include <synch/spinlock.h> |
| |
| static char digits[] = "0123456789abcdef"; |
| static spinlock_t printflock; |
| |
| void print_str(char *str) |
| { |
| int i = 0; |
| char c; |
| |
| while (c = str[i++]) |
| putchar(c); |
| } |
| |
| |
| /* |
| * This is a universal function for printing hexadecimal numbers of fixed |
| * width. |
| */ |
| void print_fixed_hex(__u32 num, int width) |
| { |
| int i; |
| |
| for (i = width*8 - 4; i >= 0; i -= 4) |
| putchar(digits[(num>>i) & 0xf]); |
| } |
| |
| /* |
| * This is a universal function for printing decimal and hexadecimal numbers. |
| * It prints only significant digits. |
| */ |
| void print_number(__u32 num, int base) |
| { |
| char d[32+1]; /* this is good enough even for base == 2 */ |
| int i = 31; |
| |
| do { |
| d[i--] = digits[num % base]; |
| } while (num /= base); |
| |
| d[32] = 0; |
| print_str(&d[i + 1]); |
| } |
| |
| /* |
| * This is our function for printing formatted text. |
| * It's much simpler than the user-space one. |
| * We are greateful for this function. |
| */ |
| void printf(char *fmt, ...) |
| { |
| int irqpri, i = 0, pos = 0; |
| char c; |
| |
| irqpri = cpu_priority_high(); |
| spinlock_lock(&printflock); |
| while (c = fmt[i++]) { |
| switch (c) { |
| |
| /* control character */ |
| case '%': |
| switch (c = fmt[i++]) { |
| |
| /* percentile itself */ |
| case '%': |
| break; |
| |
| /* |
| * String and character conversions. |
| */ |
| case 's': |
| print_str((char *) *(((__address *) &fmt + (++pos)))); |
| goto loop; |
| |
| case 'c': |
| c = *((char *) ((__address *)(&fmt + (++pos)))); |
| break; |
| |
| /* |
| * Hexadecimal conversions with fixed width. |
| */ |
| case 'L': |
| print_str("0x"); |
| case 'l': |
| print_fixed_hex(*((__address *)(&fmt + (++pos))),INT32); |
| goto loop; |
| |
| case 'W': |
| print_str("0x"); |
| case 'w': |
| print_fixed_hex(*((__address *)(&fmt + (++pos))),INT16); |
| goto loop; |
| |
| case 'B': |
| print_str("0x"); |
| case 'b': |
| print_fixed_hex(*((__address *)(&fmt + (++pos))),INT8); |
| goto loop; |
| |
| /* |
| * Decimal and hexadecimal conversions. |
| */ |
| case 'd': |
| print_number(*((__address *)(&fmt + (++pos))), 10); |
| goto loop; |
| |
| case 'X': |
| print_str("0x"); |
| case 'x': |
| print_number(*((__address *)(&fmt + (++pos))), 16); |
| goto loop; |
| |
| /* |
| * Bad formatting. |
| */ |
| default: |
| goto out; |
| } |
| |
| default: putchar(c); |
| } |
| |
| loop: |
| ; |
| } |
| |
| out: |
| spinlock_unlock(&printflock); |
| cpu_priority_restore(irqpri); |
| } |