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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 | |
264 | cejka | 44 | void print_double(double num, __u8 modifier, __u16 precision) |
228 | cejka | 45 | { |
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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264 | cejka | 51 | |
228 | cejka | 52 | /* |
53 | if (fmath_is_nan(num)) { |
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54 | print_str("NaN"); |
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55 | return; |
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56 | } |
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57 | */ |
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58 | |||
59 | if (fmath_is_negative(num)) { |
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60 | putchar('-'); |
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61 | } |
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62 | |||
63 | num=fmath_abs(num); |
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64 | |||
264 | cejka | 65 | if ((modifier=='E')||(modifier=='e')) { |
66 | intval2=fmath_fint(fmath_get_decimal_exponent(num),&intval); |
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67 | exponent=intval; |
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68 | if ((intval2<0.0)&&(exponent<0)) exponent--; |
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69 | num = num / ((fmath_dpow(10.0,exponent))); |
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70 | |||
71 | print_double(num,modifier+1,precision); //modifier+1 = E => F or e => f |
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72 | putchar(modifier); |
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73 | if (exponent<0) { |
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74 | putchar('-'); |
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75 | exponent*=-1; |
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76 | } |
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77 | print_number(exponent,10); |
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78 | return; |
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79 | } |
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80 | |||
81 | |||
228 | cejka | 82 | /* |
83 | if (fmath_is_infinity(num)) { |
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84 | print_str("Inf"); |
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85 | } |
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86 | */ |
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87 | //TODO: rounding constant - when we got fraction >= 0.5, we must increment last printed number |
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88 | |||
89 | /* Here is problem with cumulative error while printing big double values -> we will divide |
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90 | 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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91 | |||
92 | fmath_fint(fmath_get_decimal_exponent(num),&intval); |
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93 | |||
94 | exponent=(intval>0.0?intval:0); |
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95 | |||
96 | precision+=exponent; |
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97 | |||
98 | if (exponent>0) num = num / ((fmath_dpow(10.0,exponent))); |
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99 | |||
100 | num=fmath_fint(num,&intval); |
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101 | |||
102 | if (precision>0) { |
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103 | counter=precision-1; |
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104 | if (exponent>0) counter++; |
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105 | |||
106 | if (counter>=DEFAULT_DOUBLE_BUFFER_SIZE) { |
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107 | counter=DEFAULT_DOUBLE_BUFFER_SIZE; |
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108 | } |
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109 | exponenttmp=exponent; |
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110 | while(counter>=0) { |
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111 | num *= 10.0; |
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112 | num = fmath_fint(num,&intval2); |
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113 | buf[counter--]=((int)intval2)+'0'; |
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114 | exponenttmp--; |
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115 | if ((exponenttmp==0)&&(counter>=0)) buf[counter--]='.'; |
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116 | } |
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117 | counter=precision; |
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118 | if ((exponent==0)&&(counter<DEFAULT_DOUBLE_BUFFER_SIZE)) buf[counter]='.'; |
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119 | counter++; |
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120 | } else { |
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121 | counter=0; |
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122 | } |
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123 | |||
124 | if (intval==0.0) { |
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125 | if (counter<DEFAULT_DOUBLE_BUFFER_SIZE) buf[counter++]='0'; |
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126 | } else { |
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127 | in1=intval; |
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128 | while(( in1>0 )&&(counter<DEFAULT_DOUBLE_BUFFER_SIZE)) { |
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129 | |||
130 | in2=in1; |
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131 | in1/=10; |
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132 | buf[counter]=in2-in1*10 + '0'; |
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133 | counter++; |
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134 | } |
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135 | } |
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136 | |||
137 | counter = (counter>=DEFAULT_DOUBLE_BUFFER_SIZE?DEFAULT_DOUBLE_BUFFER_SIZE:counter); |
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138 | while (counter>0) { |
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139 | putchar(buf[--counter]); |
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140 | }; |
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141 | return; |
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142 | } |
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143 | |||
61 | decky | 144 | /** Print NULL terminated string |
145 | * |
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146 | * Print characters from str using putchar() until |
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147 | * \x00 character is reached. |
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148 | * |
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149 | * @param str Characters to print. |
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150 | * |
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151 | */ |
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63 | decky | 152 | void print_str(const char *str) |
1 | jermar | 153 | { |
68 | decky | 154 | int i = 0; |
1 | jermar | 155 | char c; |
68 | decky | 156 | |
1 | jermar | 157 | while (c = str[i++]) |
68 | decky | 158 | putchar(c); |
1 | jermar | 159 | } |
160 | |||
161 | |||
61 | decky | 162 | /** Print hexadecimal digits |
163 | * |
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164 | * Print fixed count of hexadecimal digits from |
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165 | * the number num. The digits are printed in |
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166 | * natural left-to-right order starting with |
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167 | * the width-th digit. |
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168 | * |
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169 | * @param num Number containing digits. |
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170 | * @param width Count of digits to print. |
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171 | * |
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1 | jermar | 172 | */ |
181 | cejka | 173 | void print_fixed_hex(const __u64 num, const int width) |
1 | jermar | 174 | { |
175 | int i; |
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176 | |||
177 | for (i = width*8 - 4; i >= 0; i -= 4) |
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178 | putchar(digits[(num>>i) & 0xf]); |
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179 | } |
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180 | |||
61 | decky | 181 | |
182 | /** Print number in given base |
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183 | * |
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184 | * Print significant digits of a number in given |
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185 | * base. |
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186 | * |
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187 | * @param num Number to print. |
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188 | * @param base Base to print the number in (should |
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189 | * be in range 2 .. 16). |
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190 | * |
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1 | jermar | 191 | */ |
68 | decky | 192 | void print_number(const __native num, const unsigned int base) |
63 | decky | 193 | { |
194 | int val = num; |
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42 | jermar | 195 | char d[sizeof(__native)*8+1]; /* this is good enough even for base == 2 */ |
68 | decky | 196 | int i = sizeof(__native)*8-1; |
197 | |||
1 | jermar | 198 | do { |
63 | decky | 199 | d[i--] = digits[val % base]; |
200 | } while (val /= base); |
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1 | jermar | 201 | |
42 | jermar | 202 | d[sizeof(__native)*8] = 0; |
1 | jermar | 203 | print_str(&d[i + 1]); |
204 | } |
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205 | |||
61 | decky | 206 | |
207 | /** General formatted text print |
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208 | * |
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209 | * Print text formatted according the fmt parameter |
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210 | * and variant arguments. Each formatting directive |
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211 | * begins with % (percentage) character and one of the |
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212 | * following character: |
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213 | * |
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214 | * % Prints the percentage character. |
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66 | jermar | 215 | * s The next variant argument is treated as char* |
61 | decky | 216 | * and printed as a NULL terminated string. |
66 | jermar | 217 | * c The next variant argument is treated as a single char. |
77 | jermar | 218 | * p The next variant argument is treated as a maximum |
219 | * bit-width integer with respect to architecture |
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220 | * and printed in full hexadecimal width. |
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221 | * P As with 'p', but '0x' is prefixed. |
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222 | * q The next variant argument is treated as a 64b integer |
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223 | * and printed in full hexadecimal width. |
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224 | * Q As with 'q', but '0x' is prefixed. |
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66 | jermar | 225 | * l The next variant argument is treated as a 32b integer |
61 | decky | 226 | * and printed in full hexadecimal width. |
227 | * L As with 'l', but '0x' is prefixed. |
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66 | jermar | 228 | * w The next variant argument is treated as a 16b integer |
61 | decky | 229 | * and printed in full hexadecimal width. |
230 | * W As with 'w', but '0x' is prefixed. |
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66 | jermar | 231 | * b The next variant argument is treated as a 8b integer |
61 | decky | 232 | * and printed in full hexadecimal width. |
233 | * N As with 'b', but '0x' is prefixed. |
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66 | jermar | 234 | * d The next variant argument is treated as integer |
61 | decky | 235 | * and printed in standard decimal format (only significant |
236 | * digits). |
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66 | jermar | 237 | * x The next variant argument is treated as integer |
61 | decky | 238 | * and printed in standard hexadecimal format (only significant |
239 | * digits). |
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240 | * X As with 'x', but '0x' is prefixed. |
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241 | * |
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242 | * All other characters from fmt except the formatting directives |
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243 | * are printed in verbatim. |
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244 | * |
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245 | * @param fmt Formatting NULL terminated string. |
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246 | * |
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1 | jermar | 247 | */ |
63 | decky | 248 | void printf(const char *fmt, ...) |
1 | jermar | 249 | { |
40 | jermar | 250 | int irqpri, i = 0; |
251 | va_list ap; |
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252 | char c; |
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264 | cejka | 253 | |
254 | __u16 precision; |
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255 | |||
40 | jermar | 256 | va_start(ap, fmt); |
257 | |||
1 | jermar | 258 | irqpri = cpu_priority_high(); |
259 | spinlock_lock(&printflock); |
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40 | jermar | 260 | |
1 | jermar | 261 | while (c = fmt[i++]) { |
262 | switch (c) { |
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263 | |||
264 | cejka | 264 | |
265 | |||
1 | jermar | 266 | /* control character */ |
267 | case '%': |
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264 | cejka | 268 | |
269 | precision = DEFAULT_DOUBLE_PRECISION; |
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270 | if (fmt[i]=='.') { |
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271 | precision=0; |
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272 | c=fmt[++i]; |
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273 | while((c>='0')&&(c<='9')) { |
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274 | precision = precision*10 + c - '0'; |
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275 | c=fmt[++i]; |
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276 | } |
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277 | |||
278 | } |
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279 | |||
1 | jermar | 280 | switch (c = fmt[i++]) { |
281 | |||
282 | /* percentile itself */ |
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283 | case '%': |
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284 | break; |
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285 | |||
286 | /* |
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287 | * String and character conversions. |
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288 | */ |
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289 | case 's': |
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40 | jermar | 290 | print_str(va_arg(ap, char_ptr)); |
1 | jermar | 291 | goto loop; |
292 | |||
293 | case 'c': |
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42 | jermar | 294 | c = (char) va_arg(ap, int); |
1 | jermar | 295 | break; |
296 | |||
297 | /* |
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298 | * Hexadecimal conversions with fixed width. |
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299 | */ |
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77 | jermar | 300 | case 'P': |
301 | print_str("0x"); |
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302 | case 'p': |
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303 | print_fixed_hex(va_arg(ap, __native), sizeof(__native)); |
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304 | goto loop; |
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305 | |||
306 | case 'Q': |
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307 | print_str("0x"); |
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308 | case 'q': |
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181 | cejka | 309 | print_fixed_hex(va_arg(ap, __u64), INT64); |
77 | jermar | 310 | goto loop; |
311 | |||
1 | jermar | 312 | case 'L': |
313 | print_str("0x"); |
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314 | case 'l': |
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40 | jermar | 315 | print_fixed_hex(va_arg(ap, __native), INT32); |
1 | jermar | 316 | goto loop; |
317 | |||
318 | case 'W': |
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319 | print_str("0x"); |
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320 | case 'w': |
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40 | jermar | 321 | print_fixed_hex(va_arg(ap, __native), INT16); |
1 | jermar | 322 | goto loop; |
323 | |||
324 | case 'B': |
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325 | print_str("0x"); |
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326 | case 'b': |
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40 | jermar | 327 | print_fixed_hex(va_arg(ap, __native), INT8); |
1 | jermar | 328 | goto loop; |
329 | |||
330 | /* |
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228 | cejka | 331 | * Floating point conversions. |
332 | */ |
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333 | |||
334 | case 'F': |
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264 | cejka | 335 | print_double(va_arg(ap, double),'F',precision); |
336 | goto loop; |
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337 | |||
228 | cejka | 338 | case 'f': |
264 | cejka | 339 | print_double(va_arg(ap, double),'f',precision); |
228 | cejka | 340 | goto loop; |
264 | cejka | 341 | |
342 | case 'E': |
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343 | print_double(va_arg(ap, double),'E',precision); |
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344 | goto loop; |
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345 | case 'e': |
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346 | print_double(va_arg(ap, double),'e',precision); |
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347 | goto loop; |
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348 | |||
228 | cejka | 349 | /* |
1 | jermar | 350 | * Decimal and hexadecimal conversions. |
351 | */ |
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352 | case 'd': |
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40 | jermar | 353 | print_number(va_arg(ap, __native), 10); |
1 | jermar | 354 | goto loop; |
355 | |||
356 | case 'X': |
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357 | print_str("0x"); |
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358 | case 'x': |
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40 | jermar | 359 | print_number(va_arg(ap, __native), 16); |
1 | jermar | 360 | goto loop; |
361 | |||
362 | /* |
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363 | * Bad formatting. |
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364 | */ |
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365 | default: |
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366 | goto out; |
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367 | } |
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368 | |||
369 | default: putchar(c); |
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370 | } |
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371 | |||
372 | loop: |
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373 | ; |
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374 | } |
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375 | |||
376 | out: |
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377 | spinlock_unlock(&printflock); |
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378 | cpu_priority_restore(irqpri); |
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40 | jermar | 379 | |
380 | va_end(ap); |
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1 | jermar | 381 | } |