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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 | |
| 61 | decky | 35 | static char digits[] = "0123456789abcdef"; /**< Hexadecimal characters */ |
| 36 | static spinlock_t printflock; /**< printf spinlock */ |
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| 1 | jermar | 37 | |
| 61 | decky | 38 | |
| 39 | /** Print NULL terminated string |
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| 40 | * |
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| 41 | * Print characters from str using putchar() until |
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| 42 | * \x00 character is reached. |
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| 43 | * |
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| 44 | * @param str Characters to print. |
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| 45 | * |
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| 46 | */ |
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| 63 | decky | 47 | void print_str(const char *str) |
| 1 | jermar | 48 | { |
| 49 | int i = 0; |
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| 50 | char c; |
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| 51 | |||
| 52 | while (c = str[i++]) |
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| 53 | putchar(c); |
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| 54 | } |
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| 55 | |||
| 56 | |||
| 61 | decky | 57 | /** Print hexadecimal digits |
| 58 | * |
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| 59 | * Print fixed count of hexadecimal digits from |
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| 60 | * the number num. The digits are printed in |
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| 61 | * natural left-to-right order starting with |
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| 62 | * the width-th digit. |
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| 63 | * |
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| 64 | * @param num Number containing digits. |
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| 65 | * @param width Count of digits to print. |
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| 66 | * |
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| 1 | jermar | 67 | */ |
| 63 | decky | 68 | void print_fixed_hex(const __native num, const int width) |
| 1 | jermar | 69 | { |
| 70 | int i; |
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| 71 | |||
| 72 | for (i = width*8 - 4; i >= 0; i -= 4) |
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| 73 | putchar(digits[(num>>i) & 0xf]); |
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| 74 | } |
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| 75 | |||
| 61 | decky | 76 | |
| 77 | /** Print number in given base |
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| 78 | * |
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| 79 | * Print significant digits of a number in given |
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| 80 | * base. |
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| 81 | * |
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| 82 | * @param num Number to print. |
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| 83 | * @param base Base to print the number in (should |
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| 84 | * be in range 2 .. 16). |
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| 85 | * |
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| 1 | jermar | 86 | */ |
| 63 | decky | 87 | void print_number(const __native num, const int base) |
| 88 | { |
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| 89 | int val = num; |
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| 42 | jermar | 90 | char d[sizeof(__native)*8+1]; /* this is good enough even for base == 2 */ |
| 91 | int i = sizeof(__native)*8-1; |
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| 1 | jermar | 92 | |
| 93 | do { |
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| 63 | decky | 94 | d[i--] = digits[val % base]; |
| 95 | } while (val /= base); |
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| 1 | jermar | 96 | |
| 42 | jermar | 97 | d[sizeof(__native)*8] = 0; |
| 1 | jermar | 98 | print_str(&d[i + 1]); |
| 99 | } |
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| 100 | |||
| 61 | decky | 101 | |
| 102 | /** General formatted text print |
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| 103 | * |
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| 104 | * Print text formatted according the fmt parameter |
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| 105 | * and variant arguments. Each formatting directive |
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| 106 | * begins with % (percentage) character and one of the |
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| 107 | * following character: |
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| 108 | * |
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| 109 | * % Prints the percentage character. |
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| 110 | * s The next variant argument is threated as char* |
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| 111 | * and printed as a NULL terminated string. |
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| 112 | * c The next variant argument is threated as a single char. |
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| 113 | * l The next variant argument is threated as a 32b integer |
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| 114 | * and printed in full hexadecimal width. |
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| 115 | * L As with 'l', but '0x' is prefixed. |
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| 116 | * w The next variant argument is threated as a 16b integer |
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| 117 | * and printed in full hexadecimal width. |
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| 118 | * W As with 'w', but '0x' is prefixed. |
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| 119 | * b The next variant argument is threated as a 8b integer |
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| 120 | * and printed in full hexadecimal width. |
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| 121 | * N As with 'b', but '0x' is prefixed. |
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| 122 | * d The next variant argument is threated as integer |
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| 123 | * and printed in standard decimal format (only significant |
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| 124 | * digits). |
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| 125 | * x The next variant argument is threated as integer |
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| 126 | * and printed in standard hexadecimal format (only significant |
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| 127 | * digits). |
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| 128 | * X As with 'x', but '0x' is prefixed. |
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| 129 | * |
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| 130 | * All other characters from fmt except the formatting directives |
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| 131 | * are printed in verbatim. |
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| 132 | * |
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| 133 | * @param fmt Formatting NULL terminated string. |
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| 134 | * |
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| 1 | jermar | 135 | */ |
| 63 | decky | 136 | void printf(const char *fmt, ...) |
| 1 | jermar | 137 | { |
| 40 | jermar | 138 | int irqpri, i = 0; |
| 139 | va_list ap; |
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| 140 | char c; |
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| 1 | jermar | 141 | |
| 40 | jermar | 142 | va_start(ap, fmt); |
| 143 | |||
| 1 | jermar | 144 | irqpri = cpu_priority_high(); |
| 145 | spinlock_lock(&printflock); |
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| 40 | jermar | 146 | |
| 1 | jermar | 147 | while (c = fmt[i++]) { |
| 148 | switch (c) { |
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| 149 | |||
| 150 | /* control character */ |
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| 151 | case '%': |
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| 152 | switch (c = fmt[i++]) { |
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| 153 | |||
| 154 | /* percentile itself */ |
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| 155 | case '%': |
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| 156 | break; |
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| 157 | |||
| 158 | /* |
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| 159 | * String and character conversions. |
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| 160 | */ |
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| 161 | case 's': |
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| 40 | jermar | 162 | print_str(va_arg(ap, char_ptr)); |
| 1 | jermar | 163 | goto loop; |
| 164 | |||
| 165 | case 'c': |
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| 42 | jermar | 166 | c = (char) va_arg(ap, int); |
| 1 | jermar | 167 | break; |
| 168 | |||
| 169 | /* |
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| 170 | * Hexadecimal conversions with fixed width. |
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| 171 | */ |
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| 172 | case 'L': |
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| 173 | print_str("0x"); |
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| 174 | case 'l': |
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| 40 | jermar | 175 | print_fixed_hex(va_arg(ap, __native), INT32); |
| 1 | jermar | 176 | goto loop; |
| 177 | |||
| 178 | case 'W': |
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| 179 | print_str("0x"); |
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| 180 | case 'w': |
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| 40 | jermar | 181 | print_fixed_hex(va_arg(ap, __native), INT16); |
| 1 | jermar | 182 | goto loop; |
| 183 | |||
| 184 | case 'B': |
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| 185 | print_str("0x"); |
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| 186 | case 'b': |
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| 40 | jermar | 187 | print_fixed_hex(va_arg(ap, __native), INT8); |
| 1 | jermar | 188 | goto loop; |
| 189 | |||
| 190 | /* |
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| 191 | * Decimal and hexadecimal conversions. |
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| 192 | */ |
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| 193 | case 'd': |
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| 40 | jermar | 194 | print_number(va_arg(ap, __native), 10); |
| 1 | jermar | 195 | goto loop; |
| 196 | |||
| 197 | case 'X': |
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| 198 | print_str("0x"); |
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| 199 | case 'x': |
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| 40 | jermar | 200 | print_number(va_arg(ap, __native), 16); |
| 1 | jermar | 201 | goto loop; |
| 202 | |||
| 203 | /* |
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| 204 | * Bad formatting. |
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| 205 | */ |
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| 206 | default: |
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| 207 | goto out; |
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| 208 | } |
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| 209 | |||
| 210 | default: putchar(c); |
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| 211 | } |
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| 212 | |||
| 213 | loop: |
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| 214 | ; |
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| 215 | } |
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| 216 | |||
| 217 | out: |
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| 218 | spinlock_unlock(&printflock); |
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| 219 | cpu_priority_restore(irqpri); |
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| 40 | jermar | 220 | |
| 221 | va_end(ap); |
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| 1 | jermar | 222 | } |