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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; |
323 | jermar | 61 | } |
228 | cejka | 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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323 | jermar | 67 | } |
266 | cejka | 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 | |||
323 | jermar | 75 | print_double(num,modifier+1,precision); /* modifier+1 = E => F or e => f */ |
264 | cejka | 76 | putchar(modifier); |
77 | if (exponent<0) { |
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78 | putchar('-'); |
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79 | exponent*=-1; |
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323 | jermar | 80 | } |
264 | cejka | 81 | print_number(exponent,10); |
82 | return; |
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323 | jermar | 83 | } |
264 | cejka | 84 | |
323 | jermar | 85 | /* TODO: rounding constant - when we got fraction >= 0.5, we must increment last printed number */ |
228 | cejka | 86 | |
323 | jermar | 87 | /* |
88 | * Here is a problem with cumulative error while printing big double values -> we will divide |
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89 | * the number with a power of 10, print new number with better method for small numbers and |
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90 | * then print decimal point at correct position. |
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91 | */ |
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228 | cejka | 92 | |
93 | fmath_fint(fmath_get_decimal_exponent(num),&intval); |
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94 | |||
95 | exponent=(intval>0.0?intval:0); |
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96 | |||
97 | precision+=exponent; |
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98 | |||
99 | if (exponent>0) num = num / ((fmath_dpow(10.0,exponent))); |
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100 | |||
101 | num=fmath_fint(num,&intval); |
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102 | |||
103 | if (precision>0) { |
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104 | counter=precision-1; |
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105 | if (exponent>0) counter++; |
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106 | |||
107 | if (counter>=DEFAULT_DOUBLE_BUFFER_SIZE) { |
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108 | counter=DEFAULT_DOUBLE_BUFFER_SIZE; |
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109 | } |
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110 | exponenttmp=exponent; |
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111 | while(counter>=0) { |
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112 | num *= 10.0; |
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113 | num = fmath_fint(num,&intval2); |
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114 | buf[counter--]=((int)intval2)+'0'; |
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115 | exponenttmp--; |
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116 | if ((exponenttmp==0)&&(counter>=0)) buf[counter--]='.'; |
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117 | } |
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118 | counter=precision; |
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119 | if ((exponent==0)&&(counter<DEFAULT_DOUBLE_BUFFER_SIZE)) buf[counter]='.'; |
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120 | counter++; |
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121 | } else { |
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122 | counter=0; |
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123 | } |
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124 | |||
276 | cejka | 125 | in1=intval; |
126 | if (in1==0.0) { |
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228 | cejka | 127 | if (counter<DEFAULT_DOUBLE_BUFFER_SIZE) buf[counter++]='0'; |
128 | } else { |
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129 | while(( in1>0 )&&(counter<DEFAULT_DOUBLE_BUFFER_SIZE)) { |
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130 | |||
131 | in2=in1; |
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132 | in1/=10; |
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133 | buf[counter]=in2-in1*10 + '0'; |
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134 | counter++; |
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135 | } |
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136 | } |
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137 | |||
138 | counter = (counter>=DEFAULT_DOUBLE_BUFFER_SIZE?DEFAULT_DOUBLE_BUFFER_SIZE:counter); |
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139 | while (counter>0) { |
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140 | putchar(buf[--counter]); |
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323 | jermar | 141 | } |
228 | cejka | 142 | return; |
143 | } |
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144 | |||
61 | decky | 145 | /** Print NULL terminated string |
146 | * |
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147 | * Print characters from str using putchar() until |
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405 | jermar | 148 | * \\0 character is reached. |
61 | decky | 149 | * |
150 | * @param str Characters to print. |
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151 | * |
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152 | */ |
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63 | decky | 153 | void print_str(const char *str) |
1 | jermar | 154 | { |
68 | decky | 155 | int i = 0; |
1 | jermar | 156 | char c; |
68 | decky | 157 | |
1 | jermar | 158 | while (c = str[i++]) |
68 | decky | 159 | putchar(c); |
1 | jermar | 160 | } |
161 | |||
162 | |||
61 | decky | 163 | /** Print hexadecimal digits |
164 | * |
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165 | * Print fixed count of hexadecimal digits from |
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166 | * the number num. The digits are printed in |
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167 | * natural left-to-right order starting with |
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168 | * the width-th digit. |
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169 | * |
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170 | * @param num Number containing digits. |
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171 | * @param width Count of digits to print. |
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172 | * |
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1 | jermar | 173 | */ |
181 | cejka | 174 | void print_fixed_hex(const __u64 num, const int width) |
1 | jermar | 175 | { |
176 | int i; |
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177 | |||
178 | for (i = width*8 - 4; i >= 0; i -= 4) |
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179 | putchar(digits[(num>>i) & 0xf]); |
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180 | } |
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181 | |||
61 | decky | 182 | |
183 | /** Print number in given base |
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184 | * |
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185 | * Print significant digits of a number in given |
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186 | * base. |
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187 | * |
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188 | * @param num Number to print. |
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189 | * @param base Base to print the number in (should |
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190 | * be in range 2 .. 16). |
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191 | * |
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1 | jermar | 192 | */ |
68 | decky | 193 | void print_number(const __native num, const unsigned int base) |
63 | decky | 194 | { |
195 | int val = num; |
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42 | jermar | 196 | char d[sizeof(__native)*8+1]; /* this is good enough even for base == 2 */ |
68 | decky | 197 | int i = sizeof(__native)*8-1; |
198 | |||
1 | jermar | 199 | do { |
63 | decky | 200 | d[i--] = digits[val % base]; |
201 | } while (val /= base); |
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1 | jermar | 202 | |
42 | jermar | 203 | d[sizeof(__native)*8] = 0; |
1 | jermar | 204 | print_str(&d[i + 1]); |
205 | } |
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206 | |||
61 | decky | 207 | |
208 | /** General formatted text print |
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209 | * |
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210 | * Print text formatted according the fmt parameter |
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211 | * and variant arguments. Each formatting directive |
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405 | jermar | 212 | * begins with \% (percentage) character and one of the |
61 | decky | 213 | * following character: |
214 | * |
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405 | jermar | 215 | * \% Prints the percentage character. |
216 | * |
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66 | jermar | 217 | * s The next variant argument is treated as char* |
61 | decky | 218 | * and printed as a NULL terminated string. |
405 | jermar | 219 | * |
66 | jermar | 220 | * c The next variant argument is treated as a single char. |
405 | jermar | 221 | * |
77 | jermar | 222 | * p The next variant argument is treated as a maximum |
223 | * bit-width integer with respect to architecture |
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224 | * and printed in full hexadecimal width. |
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405 | jermar | 225 | * |
77 | jermar | 226 | * P As with 'p', but '0x' is prefixed. |
405 | jermar | 227 | * |
77 | jermar | 228 | * q The next variant argument is treated as a 64b integer |
229 | * and printed in full hexadecimal width. |
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405 | jermar | 230 | * |
77 | jermar | 231 | * Q As with 'q', but '0x' is prefixed. |
405 | jermar | 232 | * |
66 | jermar | 233 | * l The next variant argument is treated as a 32b integer |
61 | decky | 234 | * and printed in full hexadecimal width. |
405 | jermar | 235 | * |
61 | decky | 236 | * L As with 'l', but '0x' is prefixed. |
405 | jermar | 237 | * |
66 | jermar | 238 | * w The next variant argument is treated as a 16b integer |
61 | decky | 239 | * and printed in full hexadecimal width. |
405 | jermar | 240 | * |
61 | decky | 241 | * W As with 'w', but '0x' is prefixed. |
405 | jermar | 242 | * |
66 | jermar | 243 | * b The next variant argument is treated as a 8b integer |
61 | decky | 244 | * and printed in full hexadecimal width. |
405 | jermar | 245 | * |
246 | * B As with 'b', but '0x' is prefixed. |
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247 | * |
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66 | jermar | 248 | * d The next variant argument is treated as integer |
61 | decky | 249 | * and printed in standard decimal format (only significant |
250 | * digits). |
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405 | jermar | 251 | * |
66 | jermar | 252 | * x The next variant argument is treated as integer |
61 | decky | 253 | * and printed in standard hexadecimal format (only significant |
254 | * digits). |
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405 | jermar | 255 | * |
61 | decky | 256 | * X As with 'x', but '0x' is prefixed. |
405 | jermar | 257 | * |
323 | jermar | 258 | * . The decimal number following period will be treated as precision |
259 | * for printing floating point numbers. One of 'e', 'E', 'f' or 'F' |
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260 | * must follow. |
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405 | jermar | 261 | * |
323 | jermar | 262 | * e The next variant argument is treated as double precision float |
263 | * and printed in exponent notation with only one digit before decimal point |
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264 | * in specified precision. The exponent sign is printed as 'e'. |
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405 | jermar | 265 | * |
323 | jermar | 266 | * E As with 'e', but the exponent sign is printed as 'E'. |
405 | jermar | 267 | * |
323 | jermar | 268 | * f The next variant argument is treated as double precision float |
269 | * and printed in decimal notation in specified precision. |
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405 | jermar | 270 | * |
323 | jermar | 271 | * F As with 'f'. |
61 | decky | 272 | * |
273 | * All other characters from fmt except the formatting directives |
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274 | * are printed in verbatim. |
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275 | * |
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276 | * @param fmt Formatting NULL terminated string. |
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1 | jermar | 277 | */ |
63 | decky | 278 | void printf(const char *fmt, ...) |
1 | jermar | 279 | { |
40 | jermar | 280 | int irqpri, i = 0; |
281 | va_list ap; |
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282 | char c; |
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264 | cejka | 283 | |
284 | __u16 precision; |
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285 | |||
40 | jermar | 286 | va_start(ap, fmt); |
287 | |||
413 | jermar | 288 | irqpri = interrupts_disable(); |
1 | jermar | 289 | spinlock_lock(&printflock); |
40 | jermar | 290 | |
1 | jermar | 291 | while (c = fmt[i++]) { |
292 | switch (c) { |
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293 | |||
294 | /* control character */ |
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295 | case '%': |
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323 | jermar | 296 | precision = DEFAULT_DOUBLE_PRECISION; |
297 | if (fmt[i]=='.') { |
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298 | precision=0; |
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299 | c=fmt[++i]; |
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300 | while((c>='0')&&(c<='9')) { |
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301 | precision = precision*10 + c - '0'; |
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264 | cejka | 302 | c=fmt[++i]; |
303 | } |
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323 | jermar | 304 | } |
264 | cejka | 305 | |
323 | jermar | 306 | switch (c = fmt[i++]) { |
1 | jermar | 307 | |
323 | jermar | 308 | /* percentile itself */ |
309 | case '%': |
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310 | break; |
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1 | jermar | 311 | |
323 | jermar | 312 | /* |
313 | * String and character conversions. |
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314 | */ |
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315 | case 's': |
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316 | print_str(va_arg(ap, char_ptr)); |
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317 | goto loop; |
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1 | jermar | 318 | |
323 | jermar | 319 | case 'c': |
320 | c = (char) va_arg(ap, int); |
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321 | break; |
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1 | jermar | 322 | |
323 | jermar | 323 | /* |
324 | * Hexadecimal conversions with fixed width. |
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325 | */ |
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326 | case 'P': |
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327 | print_str("0x"); |
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328 | case 'p': |
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329 | print_fixed_hex(va_arg(ap, __native), sizeof(__native)); |
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330 | goto loop; |
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77 | jermar | 331 | |
323 | jermar | 332 | case 'Q': |
333 | print_str("0x"); |
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334 | case 'q': |
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335 | print_fixed_hex(va_arg(ap, __u64), INT64); |
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336 | goto loop; |
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77 | jermar | 337 | |
323 | jermar | 338 | case 'L': |
339 | print_str("0x"); |
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340 | case 'l': |
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341 | print_fixed_hex(va_arg(ap, __native), INT32); |
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342 | goto loop; |
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1 | jermar | 343 | |
323 | jermar | 344 | case 'W': |
345 | print_str("0x"); |
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346 | case 'w': |
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347 | print_fixed_hex(va_arg(ap, __native), INT16); |
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348 | goto loop; |
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1 | jermar | 349 | |
323 | jermar | 350 | case 'B': |
351 | print_str("0x"); |
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352 | case 'b': |
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353 | print_fixed_hex(va_arg(ap, __native), INT8); |
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354 | goto loop; |
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1 | jermar | 355 | |
323 | jermar | 356 | /* |
357 | * Floating point conversions. |
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358 | */ |
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359 | case 'F': |
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360 | print_double(va_arg(ap, double),'F',precision); |
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361 | goto loop; |
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264 | cejka | 362 | |
323 | jermar | 363 | case 'f': |
364 | print_double(va_arg(ap, double),'f',precision); |
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365 | goto loop; |
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264 | cejka | 366 | |
323 | jermar | 367 | case 'E': |
368 | print_double(va_arg(ap, double),'E',precision); |
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369 | goto loop; |
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370 | case 'e': |
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371 | print_double(va_arg(ap, double),'e',precision); |
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372 | goto loop; |
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264 | cejka | 373 | |
323 | jermar | 374 | /* |
375 | * Decimal and hexadecimal conversions. |
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376 | */ |
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377 | case 'd': |
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378 | print_number(va_arg(ap, __native), 10); |
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379 | goto loop; |
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1 | jermar | 380 | |
323 | jermar | 381 | case 'X': |
382 | print_str("0x"); |
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383 | case 'x': |
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384 | print_number(va_arg(ap, __native), 16); |
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385 | goto loop; |
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1 | jermar | 386 | |
323 | jermar | 387 | /* |
388 | * Bad formatting. |
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389 | */ |
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390 | default: |
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391 | goto out; |
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392 | } |
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1 | jermar | 393 | |
394 | default: putchar(c); |
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395 | } |
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396 | |||
397 | loop: |
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398 | ; |
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399 | } |
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400 | |||
401 | out: |
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402 | spinlock_unlock(&printflock); |
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413 | jermar | 403 | interrupts_restore(irqpri); |
40 | jermar | 404 | |
405 | va_end(ap); |
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1 | jermar | 406 | } |