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| Rev | Author | Line No. | Line |
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| 1 | jermar | 1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #include <putchar.h> |
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| 30 | #include <print.h> |
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| 31 | #include <synch/spinlock.h> |
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| 40 | jermar | 32 | #include <arch/arg.h> |
| 1 | jermar | 33 | |
| 40 | jermar | 34 | |
| 1 | jermar | 35 | static char digits[] = "0123456789abcdef"; |
| 36 | static spinlock_t printflock; |
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| 37 | |||
| 38 | void print_str(char *str) |
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| 39 | { |
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| 40 | int i = 0; |
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| 41 | char c; |
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| 42 | |||
| 43 | while (c = str[i++]) |
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| 44 | putchar(c); |
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| 45 | } |
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| 46 | |||
| 47 | |||
| 48 | /* |
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| 49 | * This is a universal function for printing hexadecimal numbers of fixed |
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| 50 | * width. |
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| 51 | */ |
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| 52 | void print_fixed_hex(__u32 num, int width) |
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| 53 | { |
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| 54 | int i; |
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| 55 | |||
| 56 | for (i = width*8 - 4; i >= 0; i -= 4) |
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| 57 | putchar(digits[(num>>i) & 0xf]); |
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| 58 | } |
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| 59 | |||
| 60 | /* |
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| 61 | * This is a universal function for printing decimal and hexadecimal numbers. |
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| 62 | * It prints only significant digits. |
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| 63 | */ |
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| 64 | void print_number(__u32 num, int base) |
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| 65 | { |
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| 66 | char d[32+1]; /* this is good enough even for base == 2 */ |
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| 67 | int i = 31; |
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| 68 | |||
| 69 | do { |
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| 70 | d[i--] = digits[num % base]; |
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| 71 | } while (num /= base); |
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| 72 | |||
| 73 | d[32] = 0; |
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| 74 | print_str(&d[i + 1]); |
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| 75 | } |
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| 76 | |||
| 77 | /* |
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| 78 | * This is our function for printing formatted text. |
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| 79 | * It's much simpler than the user-space one. |
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| 80 | * We are greateful for this function. |
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| 81 | */ |
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| 82 | void printf(char *fmt, ...) |
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| 83 | { |
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| 40 | jermar | 84 | int irqpri, i = 0; |
| 85 | va_list ap; |
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| 86 | char c; |
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| 1 | jermar | 87 | |
| 40 | jermar | 88 | va_start(ap, fmt); |
| 89 | |||
| 1 | jermar | 90 | irqpri = cpu_priority_high(); |
| 91 | spinlock_lock(&printflock); |
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| 40 | jermar | 92 | |
| 1 | jermar | 93 | while (c = fmt[i++]) { |
| 94 | switch (c) { |
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| 95 | |||
| 96 | /* control character */ |
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| 97 | case '%': |
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| 98 | switch (c = fmt[i++]) { |
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| 99 | |||
| 100 | /* percentile itself */ |
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| 101 | case '%': |
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| 102 | break; |
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| 103 | |||
| 104 | /* |
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| 105 | * String and character conversions. |
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| 106 | */ |
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| 107 | case 's': |
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| 40 | jermar | 108 | print_str(va_arg(ap, char_ptr)); |
| 1 | jermar | 109 | goto loop; |
| 110 | |||
| 111 | case 'c': |
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| 40 | jermar | 112 | c = va_arg(ap, char); |
| 1 | jermar | 113 | break; |
| 114 | |||
| 115 | /* |
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| 116 | * Hexadecimal conversions with fixed width. |
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| 117 | */ |
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| 118 | case 'L': |
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| 119 | print_str("0x"); |
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| 120 | case 'l': |
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| 40 | jermar | 121 | print_fixed_hex(va_arg(ap, __native), INT32); |
| 1 | jermar | 122 | goto loop; |
| 123 | |||
| 124 | case 'W': |
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| 125 | print_str("0x"); |
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| 126 | case 'w': |
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| 40 | jermar | 127 | print_fixed_hex(va_arg(ap, __native), INT16); |
| 1 | jermar | 128 | goto loop; |
| 129 | |||
| 130 | case 'B': |
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| 131 | print_str("0x"); |
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| 132 | case 'b': |
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| 40 | jermar | 133 | print_fixed_hex(va_arg(ap, __native), INT8); |
| 1 | jermar | 134 | goto loop; |
| 135 | |||
| 136 | /* |
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| 137 | * Decimal and hexadecimal conversions. |
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| 138 | */ |
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| 139 | case 'd': |
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| 40 | jermar | 140 | print_number(va_arg(ap, __native), 10); |
| 1 | jermar | 141 | goto loop; |
| 142 | |||
| 143 | case 'X': |
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| 144 | print_str("0x"); |
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| 145 | case 'x': |
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| 40 | jermar | 146 | print_number(va_arg(ap, __native), 16); |
| 1 | jermar | 147 | goto loop; |
| 148 | |||
| 149 | /* |
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| 150 | * Bad formatting. |
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| 151 | */ |
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| 152 | default: |
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| 153 | goto out; |
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| 154 | } |
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| 155 | |||
| 156 | default: putchar(c); |
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| 157 | } |
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| 158 | |||
| 159 | loop: |
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| 160 | ; |
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| 161 | } |
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| 162 | |||
| 163 | out: |
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| 164 | spinlock_unlock(&printflock); |
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| 165 | cpu_priority_restore(irqpri); |
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| 40 | jermar | 166 | |
| 167 | va_end(ap); |
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| 1 | jermar | 168 | } |