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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> |
115 | jermar | 33 | #include <arch/asm.h> |
228 | cejka | 34 | #include <arch/fmath.h> |
35 | |||
195 | vana | 36 | #include <arch.h> |
1 | jermar | 37 | |
61 | decky | 38 | static char digits[] = "0123456789abcdef"; /**< Hexadecimal characters */ |
39 | static spinlock_t printflock; /**< printf spinlock */ |
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1 | jermar | 40 | |
228 | cejka | 41 | #define DEFAULT_DOUBLE_PRECISION 16 |
42 | #define DEFAULT_DOUBLE_BUFFER_SIZE 128 |
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61 | decky | 43 | |
228 | cejka | 44 | void print_double(double num, __u16 precision) |
45 | { |
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46 | double intval,intval2; |
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47 | int counter; |
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48 | int exponent,exponenttmp; |
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49 | unsigned char buf[DEFAULT_DOUBLE_BUFFER_SIZE]; |
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50 | unsigned long in1,in2; |
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51 | /* |
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52 | if (fmath_is_nan(num)) { |
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53 | print_str("NaN"); |
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54 | return; |
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55 | } |
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56 | */ |
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57 | |||
58 | if (fmath_is_negative(num)) { |
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59 | putchar('-'); |
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60 | } |
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61 | |||
62 | num=fmath_abs(num); |
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63 | |||
64 | /* |
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65 | if (fmath_is_infinity(num)) { |
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66 | print_str("Inf"); |
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67 | } |
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68 | */ |
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69 | //TODO: rounding constant - when we got fraction >= 0.5, we must increment last printed number |
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70 | |||
71 | /* Here is problem with cumulative error while printing big double values -> we will divide |
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72 | the number with a power of 10, print new number with better method for small numbers and then print decimal point at correct position */ |
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73 | |||
74 | fmath_fint(fmath_get_decimal_exponent(num),&intval); |
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75 | |||
76 | exponent=(intval>0.0?intval:0); |
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77 | |||
78 | precision+=exponent; |
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79 | |||
80 | if (exponent>0) num = num / ((fmath_dpow(10.0,exponent))); |
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81 | |||
82 | num=fmath_fint(num,&intval); |
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83 | |||
84 | if (precision>0) { |
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85 | counter=precision-1; |
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86 | if (exponent>0) counter++; |
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87 | |||
88 | if (counter>=DEFAULT_DOUBLE_BUFFER_SIZE) { |
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89 | counter=DEFAULT_DOUBLE_BUFFER_SIZE; |
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90 | } |
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91 | exponenttmp=exponent; |
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92 | while(counter>=0) { |
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93 | num *= 10.0; |
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94 | num = fmath_fint(num,&intval2); |
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95 | buf[counter--]=((int)intval2)+'0'; |
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96 | exponenttmp--; |
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97 | if ((exponenttmp==0)&&(counter>=0)) buf[counter--]='.'; |
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98 | } |
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99 | counter=precision; |
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100 | if ((exponent==0)&&(counter<DEFAULT_DOUBLE_BUFFER_SIZE)) buf[counter]='.'; |
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101 | counter++; |
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102 | } else { |
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103 | counter=0; |
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104 | } |
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105 | |||
106 | if (intval==0.0) { |
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107 | if (counter<DEFAULT_DOUBLE_BUFFER_SIZE) buf[counter++]='0'; |
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108 | } else { |
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109 | in1=intval; |
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110 | while(( in1>0 )&&(counter<DEFAULT_DOUBLE_BUFFER_SIZE)) { |
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111 | |||
112 | in2=in1; |
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113 | in1/=10; |
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114 | buf[counter]=in2-in1*10 + '0'; |
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115 | counter++; |
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116 | } |
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117 | } |
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118 | |||
119 | counter = (counter>=DEFAULT_DOUBLE_BUFFER_SIZE?DEFAULT_DOUBLE_BUFFER_SIZE:counter); |
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120 | while (counter>0) { |
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121 | putchar(buf[--counter]); |
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122 | }; |
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123 | return; |
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124 | } |
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125 | |||
61 | decky | 126 | /** Print NULL terminated string |
127 | * |
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128 | * Print characters from str using putchar() until |
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129 | * \x00 character is reached. |
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130 | * |
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131 | * @param str Characters to print. |
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132 | * |
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133 | */ |
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63 | decky | 134 | void print_str(const char *str) |
1 | jermar | 135 | { |
68 | decky | 136 | int i = 0; |
1 | jermar | 137 | char c; |
68 | decky | 138 | |
1 | jermar | 139 | while (c = str[i++]) |
68 | decky | 140 | putchar(c); |
1 | jermar | 141 | } |
142 | |||
143 | |||
61 | decky | 144 | /** Print hexadecimal digits |
145 | * |
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146 | * Print fixed count of hexadecimal digits from |
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147 | * the number num. The digits are printed in |
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148 | * natural left-to-right order starting with |
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149 | * the width-th digit. |
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150 | * |
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151 | * @param num Number containing digits. |
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152 | * @param width Count of digits to print. |
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153 | * |
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1 | jermar | 154 | */ |
181 | cejka | 155 | void print_fixed_hex(const __u64 num, const int width) |
1 | jermar | 156 | { |
157 | int i; |
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158 | |||
159 | for (i = width*8 - 4; i >= 0; i -= 4) |
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160 | putchar(digits[(num>>i) & 0xf]); |
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161 | } |
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162 | |||
61 | decky | 163 | |
164 | /** Print number in given base |
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165 | * |
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166 | * Print significant digits of a number in given |
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167 | * base. |
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168 | * |
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169 | * @param num Number to print. |
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170 | * @param base Base to print the number in (should |
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171 | * be in range 2 .. 16). |
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172 | * |
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1 | jermar | 173 | */ |
68 | decky | 174 | void print_number(const __native num, const unsigned int base) |
63 | decky | 175 | { |
176 | int val = num; |
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42 | jermar | 177 | char d[sizeof(__native)*8+1]; /* this is good enough even for base == 2 */ |
68 | decky | 178 | int i = sizeof(__native)*8-1; |
179 | |||
1 | jermar | 180 | do { |
63 | decky | 181 | d[i--] = digits[val % base]; |
182 | } while (val /= base); |
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1 | jermar | 183 | |
42 | jermar | 184 | d[sizeof(__native)*8] = 0; |
1 | jermar | 185 | print_str(&d[i + 1]); |
186 | } |
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187 | |||
61 | decky | 188 | |
189 | /** General formatted text print |
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190 | * |
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191 | * Print text formatted according the fmt parameter |
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192 | * and variant arguments. Each formatting directive |
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193 | * begins with % (percentage) character and one of the |
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194 | * following character: |
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195 | * |
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196 | * % Prints the percentage character. |
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66 | jermar | 197 | * s The next variant argument is treated as char* |
61 | decky | 198 | * and printed as a NULL terminated string. |
66 | jermar | 199 | * c The next variant argument is treated as a single char. |
77 | jermar | 200 | * p The next variant argument is treated as a maximum |
201 | * bit-width integer with respect to architecture |
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202 | * and printed in full hexadecimal width. |
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203 | * P As with 'p', but '0x' is prefixed. |
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204 | * q The next variant argument is treated as a 64b integer |
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205 | * and printed in full hexadecimal width. |
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206 | * Q As with 'q', but '0x' is prefixed. |
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66 | jermar | 207 | * l The next variant argument is treated as a 32b integer |
61 | decky | 208 | * and printed in full hexadecimal width. |
209 | * L As with 'l', but '0x' is prefixed. |
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66 | jermar | 210 | * w The next variant argument is treated as a 16b integer |
61 | decky | 211 | * and printed in full hexadecimal width. |
212 | * W As with 'w', but '0x' is prefixed. |
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66 | jermar | 213 | * b The next variant argument is treated as a 8b integer |
61 | decky | 214 | * and printed in full hexadecimal width. |
215 | * N As with 'b', but '0x' is prefixed. |
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66 | jermar | 216 | * d The next variant argument is treated as integer |
61 | decky | 217 | * and printed in standard decimal format (only significant |
218 | * digits). |
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66 | jermar | 219 | * x The next variant argument is treated as integer |
61 | decky | 220 | * and printed in standard hexadecimal format (only significant |
221 | * digits). |
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222 | * X As with 'x', but '0x' is prefixed. |
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223 | * |
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224 | * All other characters from fmt except the formatting directives |
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225 | * are printed in verbatim. |
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226 | * |
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227 | * @param fmt Formatting NULL terminated string. |
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228 | * |
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1 | jermar | 229 | */ |
63 | decky | 230 | void printf(const char *fmt, ...) |
1 | jermar | 231 | { |
40 | jermar | 232 | int irqpri, i = 0; |
233 | va_list ap; |
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234 | char c; |
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1 | jermar | 235 | |
40 | jermar | 236 | va_start(ap, fmt); |
237 | |||
1 | jermar | 238 | irqpri = cpu_priority_high(); |
239 | spinlock_lock(&printflock); |
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40 | jermar | 240 | |
1 | jermar | 241 | while (c = fmt[i++]) { |
242 | switch (c) { |
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243 | |||
244 | /* control character */ |
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245 | case '%': |
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246 | switch (c = fmt[i++]) { |
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247 | |||
248 | /* percentile itself */ |
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249 | case '%': |
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250 | break; |
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251 | |||
252 | /* |
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253 | * String and character conversions. |
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254 | */ |
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255 | case 's': |
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40 | jermar | 256 | print_str(va_arg(ap, char_ptr)); |
1 | jermar | 257 | goto loop; |
258 | |||
259 | case 'c': |
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42 | jermar | 260 | c = (char) va_arg(ap, int); |
1 | jermar | 261 | break; |
262 | |||
263 | /* |
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264 | * Hexadecimal conversions with fixed width. |
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265 | */ |
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77 | jermar | 266 | case 'P': |
267 | print_str("0x"); |
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268 | case 'p': |
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269 | print_fixed_hex(va_arg(ap, __native), sizeof(__native)); |
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270 | goto loop; |
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271 | |||
272 | case 'Q': |
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273 | print_str("0x"); |
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274 | case 'q': |
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181 | cejka | 275 | print_fixed_hex(va_arg(ap, __u64), INT64); |
77 | jermar | 276 | goto loop; |
277 | |||
1 | jermar | 278 | case 'L': |
279 | print_str("0x"); |
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280 | case 'l': |
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40 | jermar | 281 | print_fixed_hex(va_arg(ap, __native), INT32); |
1 | jermar | 282 | goto loop; |
283 | |||
284 | case 'W': |
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285 | print_str("0x"); |
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286 | case 'w': |
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40 | jermar | 287 | print_fixed_hex(va_arg(ap, __native), INT16); |
1 | jermar | 288 | goto loop; |
289 | |||
290 | case 'B': |
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291 | print_str("0x"); |
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292 | case 'b': |
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40 | jermar | 293 | print_fixed_hex(va_arg(ap, __native), INT8); |
1 | jermar | 294 | goto loop; |
295 | |||
296 | /* |
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228 | cejka | 297 | * Floating point conversions. |
298 | */ |
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299 | |||
300 | case 'F': |
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301 | case 'f': |
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302 | print_double(va_arg(ap, double),DEFAULT_DOUBLE_PRECISION); |
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303 | goto loop; |
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304 | /* |
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1 | jermar | 305 | * Decimal and hexadecimal conversions. |
306 | */ |
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307 | case 'd': |
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40 | jermar | 308 | print_number(va_arg(ap, __native), 10); |
1 | jermar | 309 | goto loop; |
310 | |||
311 | case 'X': |
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312 | print_str("0x"); |
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313 | case 'x': |
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40 | jermar | 314 | print_number(va_arg(ap, __native), 16); |
1 | jermar | 315 | goto loop; |
316 | |||
317 | /* |
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318 | * Bad formatting. |
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319 | */ |
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320 | default: |
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321 | goto out; |
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322 | } |
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323 | |||
324 | default: putchar(c); |
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325 | } |
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326 | |||
327 | loop: |
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328 | ; |
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329 | } |
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330 | |||
331 | out: |
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332 | spinlock_unlock(&printflock); |
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333 | cpu_priority_restore(irqpri); |
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40 | jermar | 334 | |
335 | va_end(ap); |
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1 | jermar | 336 | } |