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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 | |
266 | cejka | 52 | |
228 | cejka | 53 | if (fmath_is_nan(num)) { |
54 | print_str("NaN"); |
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55 | return; |
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56 | } |
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57 | |||
266 | cejka | 58 | if (num<0.0) { |
228 | cejka | 59 | putchar('-'); |
266 | cejka | 60 | num=num*-1.0; |
228 | cejka | 61 | } |
62 | |||
266 | cejka | 63 | |
64 | if (fmath_is_infinity(num)) { |
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65 | print_str("Inf"); |
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66 | return; |
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67 | } |
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68 | |||
264 | cejka | 69 | if ((modifier=='E')||(modifier=='e')) { |
70 | intval2=fmath_fint(fmath_get_decimal_exponent(num),&intval); |
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71 | exponent=intval; |
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276 | cejka | 72 | if ((intval2<0.0)) exponent--; |
264 | cejka | 73 | num = num / ((fmath_dpow(10.0,exponent))); |
74 | |||
75 | print_double(num,modifier+1,precision); //modifier+1 = E => F or e => f |
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76 | putchar(modifier); |
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77 | if (exponent<0) { |
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78 | putchar('-'); |
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79 | exponent*=-1; |
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80 | } |
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81 | print_number(exponent,10); |
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82 | return; |
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83 | } |
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84 | |||
228 | cejka | 85 | //TODO: rounding constant - when we got fraction >= 0.5, we must increment last printed number |
86 | |||
87 | /* Here is problem with cumulative error while printing big double values -> we will divide |
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88 | 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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89 | |||
90 | fmath_fint(fmath_get_decimal_exponent(num),&intval); |
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91 | |||
92 | exponent=(intval>0.0?intval:0); |
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93 | |||
94 | precision+=exponent; |
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95 | |||
96 | if (exponent>0) num = num / ((fmath_dpow(10.0,exponent))); |
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97 | |||
98 | num=fmath_fint(num,&intval); |
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99 | |||
100 | if (precision>0) { |
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101 | counter=precision-1; |
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102 | if (exponent>0) counter++; |
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103 | |||
104 | if (counter>=DEFAULT_DOUBLE_BUFFER_SIZE) { |
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105 | counter=DEFAULT_DOUBLE_BUFFER_SIZE; |
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106 | } |
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107 | exponenttmp=exponent; |
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108 | while(counter>=0) { |
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109 | num *= 10.0; |
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110 | num = fmath_fint(num,&intval2); |
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111 | buf[counter--]=((int)intval2)+'0'; |
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112 | exponenttmp--; |
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113 | if ((exponenttmp==0)&&(counter>=0)) buf[counter--]='.'; |
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114 | } |
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115 | counter=precision; |
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116 | if ((exponent==0)&&(counter<DEFAULT_DOUBLE_BUFFER_SIZE)) buf[counter]='.'; |
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117 | counter++; |
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118 | } else { |
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119 | counter=0; |
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120 | } |
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121 | |||
276 | cejka | 122 | in1=intval; |
123 | if (in1==0.0) { |
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228 | cejka | 124 | if (counter<DEFAULT_DOUBLE_BUFFER_SIZE) buf[counter++]='0'; |
125 | } else { |
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126 | while(( in1>0 )&&(counter<DEFAULT_DOUBLE_BUFFER_SIZE)) { |
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127 | |||
128 | in2=in1; |
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129 | in1/=10; |
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130 | buf[counter]=in2-in1*10 + '0'; |
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131 | counter++; |
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132 | } |
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133 | } |
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134 | |||
135 | counter = (counter>=DEFAULT_DOUBLE_BUFFER_SIZE?DEFAULT_DOUBLE_BUFFER_SIZE:counter); |
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136 | while (counter>0) { |
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137 | putchar(buf[--counter]); |
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138 | }; |
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139 | return; |
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140 | } |
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141 | |||
61 | decky | 142 | /** Print NULL terminated string |
143 | * |
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144 | * Print characters from str using putchar() until |
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145 | * \x00 character is reached. |
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146 | * |
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147 | * @param str Characters to print. |
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148 | * |
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149 | */ |
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63 | decky | 150 | void print_str(const char *str) |
1 | jermar | 151 | { |
68 | decky | 152 | int i = 0; |
1 | jermar | 153 | char c; |
68 | decky | 154 | |
1 | jermar | 155 | while (c = str[i++]) |
68 | decky | 156 | putchar(c); |
1 | jermar | 157 | } |
158 | |||
159 | |||
61 | decky | 160 | /** Print hexadecimal digits |
161 | * |
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162 | * Print fixed count of hexadecimal digits from |
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163 | * the number num. The digits are printed in |
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164 | * natural left-to-right order starting with |
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165 | * the width-th digit. |
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166 | * |
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167 | * @param num Number containing digits. |
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168 | * @param width Count of digits to print. |
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169 | * |
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1 | jermar | 170 | */ |
181 | cejka | 171 | void print_fixed_hex(const __u64 num, const int width) |
1 | jermar | 172 | { |
173 | int i; |
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174 | |||
175 | for (i = width*8 - 4; i >= 0; i -= 4) |
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176 | putchar(digits[(num>>i) & 0xf]); |
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177 | } |
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178 | |||
61 | decky | 179 | |
180 | /** Print number in given base |
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181 | * |
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182 | * Print significant digits of a number in given |
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183 | * base. |
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184 | * |
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185 | * @param num Number to print. |
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186 | * @param base Base to print the number in (should |
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187 | * be in range 2 .. 16). |
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188 | * |
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1 | jermar | 189 | */ |
68 | decky | 190 | void print_number(const __native num, const unsigned int base) |
63 | decky | 191 | { |
192 | int val = num; |
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42 | jermar | 193 | char d[sizeof(__native)*8+1]; /* this is good enough even for base == 2 */ |
68 | decky | 194 | int i = sizeof(__native)*8-1; |
195 | |||
1 | jermar | 196 | do { |
63 | decky | 197 | d[i--] = digits[val % base]; |
198 | } while (val /= base); |
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1 | jermar | 199 | |
42 | jermar | 200 | d[sizeof(__native)*8] = 0; |
1 | jermar | 201 | print_str(&d[i + 1]); |
202 | } |
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203 | |||
61 | decky | 204 | |
205 | /** General formatted text print |
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206 | * |
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207 | * Print text formatted according the fmt parameter |
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208 | * and variant arguments. Each formatting directive |
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209 | * begins with % (percentage) character and one of the |
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210 | * following character: |
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211 | * |
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212 | * % Prints the percentage character. |
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66 | jermar | 213 | * s The next variant argument is treated as char* |
61 | decky | 214 | * and printed as a NULL terminated string. |
66 | jermar | 215 | * c The next variant argument is treated as a single char. |
77 | jermar | 216 | * p The next variant argument is treated as a maximum |
217 | * bit-width integer with respect to architecture |
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218 | * and printed in full hexadecimal width. |
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219 | * P As with 'p', but '0x' is prefixed. |
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220 | * q The next variant argument is treated as a 64b integer |
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221 | * and printed in full hexadecimal width. |
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222 | * Q As with 'q', but '0x' is prefixed. |
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66 | jermar | 223 | * l The next variant argument is treated as a 32b integer |
61 | decky | 224 | * and printed in full hexadecimal width. |
225 | * L As with 'l', but '0x' is prefixed. |
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66 | jermar | 226 | * w The next variant argument is treated as a 16b integer |
61 | decky | 227 | * and printed in full hexadecimal width. |
228 | * W As with 'w', but '0x' is prefixed. |
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66 | jermar | 229 | * b The next variant argument is treated as a 8b integer |
61 | decky | 230 | * and printed in full hexadecimal width. |
231 | * N As with 'b', but '0x' is prefixed. |
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66 | jermar | 232 | * d The next variant argument is treated as integer |
61 | decky | 233 | * and printed in standard decimal format (only significant |
234 | * digits). |
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66 | jermar | 235 | * x The next variant argument is treated as integer |
61 | decky | 236 | * and printed in standard hexadecimal format (only significant |
237 | * digits). |
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238 | * X As with 'x', but '0x' is prefixed. |
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239 | * |
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240 | * All other characters from fmt except the formatting directives |
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241 | * are printed in verbatim. |
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242 | * |
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243 | * @param fmt Formatting NULL terminated string. |
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244 | * |
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1 | jermar | 245 | */ |
63 | decky | 246 | void printf(const char *fmt, ...) |
1 | jermar | 247 | { |
40 | jermar | 248 | int irqpri, i = 0; |
249 | va_list ap; |
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250 | char c; |
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264 | cejka | 251 | |
252 | __u16 precision; |
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253 | |||
40 | jermar | 254 | va_start(ap, fmt); |
255 | |||
1 | jermar | 256 | irqpri = cpu_priority_high(); |
257 | spinlock_lock(&printflock); |
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40 | jermar | 258 | |
1 | jermar | 259 | while (c = fmt[i++]) { |
260 | switch (c) { |
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261 | |||
264 | cejka | 262 | |
263 | |||
1 | jermar | 264 | /* control character */ |
265 | case '%': |
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264 | cejka | 266 | |
267 | precision = DEFAULT_DOUBLE_PRECISION; |
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268 | if (fmt[i]=='.') { |
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269 | precision=0; |
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270 | c=fmt[++i]; |
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271 | while((c>='0')&&(c<='9')) { |
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272 | precision = precision*10 + c - '0'; |
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273 | c=fmt[++i]; |
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274 | } |
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275 | |||
276 | } |
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277 | |||
1 | jermar | 278 | switch (c = fmt[i++]) { |
279 | |||
280 | /* percentile itself */ |
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281 | case '%': |
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282 | break; |
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283 | |||
284 | /* |
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285 | * String and character conversions. |
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286 | */ |
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287 | case 's': |
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40 | jermar | 288 | print_str(va_arg(ap, char_ptr)); |
1 | jermar | 289 | goto loop; |
290 | |||
291 | case 'c': |
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42 | jermar | 292 | c = (char) va_arg(ap, int); |
1 | jermar | 293 | break; |
294 | |||
295 | /* |
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296 | * Hexadecimal conversions with fixed width. |
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297 | */ |
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77 | jermar | 298 | case 'P': |
299 | print_str("0x"); |
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300 | case 'p': |
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301 | print_fixed_hex(va_arg(ap, __native), sizeof(__native)); |
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302 | goto loop; |
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303 | |||
304 | case 'Q': |
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305 | print_str("0x"); |
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306 | case 'q': |
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181 | cejka | 307 | print_fixed_hex(va_arg(ap, __u64), INT64); |
77 | jermar | 308 | goto loop; |
309 | |||
1 | jermar | 310 | case 'L': |
311 | print_str("0x"); |
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312 | case 'l': |
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40 | jermar | 313 | print_fixed_hex(va_arg(ap, __native), INT32); |
1 | jermar | 314 | goto loop; |
315 | |||
316 | case 'W': |
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317 | print_str("0x"); |
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318 | case 'w': |
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40 | jermar | 319 | print_fixed_hex(va_arg(ap, __native), INT16); |
1 | jermar | 320 | goto loop; |
321 | |||
322 | case 'B': |
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323 | print_str("0x"); |
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324 | case 'b': |
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40 | jermar | 325 | print_fixed_hex(va_arg(ap, __native), INT8); |
1 | jermar | 326 | goto loop; |
327 | |||
328 | /* |
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228 | cejka | 329 | * Floating point conversions. |
330 | */ |
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331 | |||
332 | case 'F': |
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264 | cejka | 333 | print_double(va_arg(ap, double),'F',precision); |
334 | goto loop; |
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335 | |||
228 | cejka | 336 | case 'f': |
264 | cejka | 337 | print_double(va_arg(ap, double),'f',precision); |
228 | cejka | 338 | goto loop; |
264 | cejka | 339 | |
340 | case 'E': |
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341 | print_double(va_arg(ap, double),'E',precision); |
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342 | goto loop; |
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343 | case 'e': |
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344 | print_double(va_arg(ap, double),'e',precision); |
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345 | goto loop; |
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346 | |||
228 | cejka | 347 | /* |
1 | jermar | 348 | * Decimal and hexadecimal conversions. |
349 | */ |
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350 | case 'd': |
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40 | jermar | 351 | print_number(va_arg(ap, __native), 10); |
1 | jermar | 352 | goto loop; |
353 | |||
354 | case 'X': |
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355 | print_str("0x"); |
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356 | case 'x': |
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40 | jermar | 357 | print_number(va_arg(ap, __native), 16); |
1 | jermar | 358 | goto loop; |
359 | |||
360 | /* |
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361 | * Bad formatting. |
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362 | */ |
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363 | default: |
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364 | goto out; |
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365 | } |
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366 | |||
367 | default: putchar(c); |
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368 | } |
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369 | |||
370 | loop: |
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371 | ; |
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372 | } |
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373 | |||
374 | out: |
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375 | spinlock_unlock(&printflock); |
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376 | cpu_priority_restore(irqpri); |
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40 | jermar | 377 | |
378 | va_end(ap); |
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1 | jermar | 379 | } |