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Rev | Author | Line No. | Line |
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885 | decky | 1 | /* |
2 | * Copyright (C) 2006 Martin Decky |
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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 "printf.h" |
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30 | #include "ofw.h" |
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31 | |||
32 | static char digits[] = "0123456789abcdef"; /**< Hexadecimal characters */ |
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33 | |||
34 | |||
953 | decky | 35 | void puts(const char *str) |
36 | { |
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37 | int len = 0; |
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38 | |||
39 | while (str[len] != 0) |
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40 | len++; |
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41 | |||
42 | ofw_write(str, len); |
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43 | } |
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44 | |||
45 | |||
885 | decky | 46 | /** Print hexadecimal digits |
47 | * |
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48 | * Print fixed count of hexadecimal digits from |
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49 | * the number num. The digits are printed in |
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50 | * natural left-to-right order starting with |
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51 | * the width-th digit. |
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52 | * |
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53 | * @param num Number containing digits. |
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54 | * @param width Count of digits to print. |
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55 | * |
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56 | */ |
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57 | static void print_fixed_hex(const __u64 num, const int width) |
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58 | { |
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59 | int i; |
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60 | |||
61 | for (i = width * 8 - 4; i >= 0; i -= 4) |
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62 | ofw_write(digits + ((num >> i) & 0xf), 1); |
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63 | } |
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64 | |||
65 | |||
66 | /** Print number in given base |
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67 | * |
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68 | * Print significant digits of a number in given |
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69 | * base. |
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70 | * |
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71 | * @param num Number to print. |
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72 | * @param base Base to print the number in (should |
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73 | * be in range 2 .. 16). |
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74 | * |
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75 | */ |
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76 | static void print_number(const __native num, const unsigned int base) |
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77 | { |
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78 | int val = num; |
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79 | char d[sizeof(__native) * 8 + 1]; /* this is good enough even for base == 2 */ |
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80 | int i = sizeof(__native) * 8 - 1; |
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81 | |||
82 | do { |
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83 | d[i--] = digits[val % base]; |
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84 | } while (val /= base); |
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85 | |||
86 | d[sizeof(__native) * 8] = 0; |
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953 | decky | 87 | puts(&d[i + 1]); |
885 | decky | 88 | } |
89 | |||
90 | |||
91 | /** General formatted text print |
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92 | * |
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93 | * Print text formatted according the fmt parameter |
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94 | * and variant arguments. Each formatting directive |
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95 | * begins with \% (percentage) character and one of the |
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96 | * following character: |
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97 | * |
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98 | * \% Prints the percentage character. |
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99 | * |
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100 | * s The next variant argument is treated as char* |
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101 | * and printed as a NULL terminated string. |
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102 | * |
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103 | * c The next variant argument is treated as a single char. |
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104 | * |
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105 | * p The next variant argument is treated as a maximum |
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106 | * bit-width integer with respect to architecture |
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107 | * and printed in full hexadecimal width. |
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108 | * |
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109 | * P As with 'p', but '0x' is prefixed. |
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110 | * |
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111 | * q The next variant argument is treated as a 64b integer |
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112 | * and printed in full hexadecimal width. |
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113 | * |
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114 | * Q As with 'q', but '0x' is prefixed. |
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115 | * |
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116 | * l The next variant argument is treated as a 32b integer |
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117 | * and printed in full hexadecimal width. |
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118 | * |
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119 | * L As with 'l', but '0x' is prefixed. |
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120 | * |
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121 | * w The next variant argument is treated as a 16b integer |
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122 | * and printed in full hexadecimal width. |
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123 | * |
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124 | * W As with 'w', but '0x' is prefixed. |
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125 | * |
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126 | * b The next variant argument is treated as a 8b integer |
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127 | * and printed in full hexadecimal width. |
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128 | * |
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129 | * B As with 'b', but '0x' is prefixed. |
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130 | * |
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131 | * d The next variant argument is treated as integer |
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132 | * and printed in standard decimal format (only significant |
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133 | * digits). |
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134 | * |
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135 | * x The next variant argument is treated as integer |
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136 | * and printed in standard hexadecimal format (only significant |
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137 | * digits). |
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138 | * |
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139 | * X As with 'x', but '0x' is prefixed. |
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140 | * |
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141 | * All other characters from fmt except the formatting directives |
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142 | * are printed in verbatim. |
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143 | * |
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144 | * @param fmt Formatting NULL terminated string. |
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145 | */ |
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146 | void printf(const char *fmt, ...) |
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147 | { |
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148 | int i = 0; |
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149 | va_list ap; |
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150 | char c; |
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151 | |||
152 | va_start(ap, fmt); |
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153 | |||
154 | while ((c = fmt[i++])) { |
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155 | switch (c) { |
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156 | |||
157 | /* control character */ |
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158 | case '%': |
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159 | |||
160 | switch (c = fmt[i++]) { |
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161 | |||
162 | /* percentile itself */ |
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163 | case '%': |
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164 | break; |
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165 | |||
166 | /* |
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167 | * String and character conversions. |
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168 | */ |
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169 | case 's': |
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953 | decky | 170 | puts(va_arg(ap, char_ptr)); |
885 | decky | 171 | goto loop; |
172 | |||
173 | case 'c': |
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174 | c = (char) va_arg(ap, int); |
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175 | break; |
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176 | |||
177 | /* |
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178 | * Hexadecimal conversions with fixed width. |
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179 | */ |
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180 | case 'P': |
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953 | decky | 181 | puts("0x"); |
885 | decky | 182 | case 'p': |
183 | print_fixed_hex(va_arg(ap, __native), sizeof(__native)); |
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184 | goto loop; |
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185 | |||
186 | case 'Q': |
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953 | decky | 187 | puts("0x"); |
885 | decky | 188 | case 'q': |
189 | print_fixed_hex(va_arg(ap, __u64), INT64); |
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190 | goto loop; |
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191 | |||
192 | case 'L': |
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953 | decky | 193 | puts("0x"); |
885 | decky | 194 | case 'l': |
195 | print_fixed_hex(va_arg(ap, __native), INT32); |
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196 | goto loop; |
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197 | |||
198 | case 'W': |
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953 | decky | 199 | puts("0x"); |
885 | decky | 200 | case 'w': |
201 | print_fixed_hex(va_arg(ap, __native), INT16); |
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202 | goto loop; |
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203 | |||
204 | case 'B': |
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953 | decky | 205 | puts("0x"); |
885 | decky | 206 | case 'b': |
207 | print_fixed_hex(va_arg(ap, __native), INT8); |
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208 | goto loop; |
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209 | |||
210 | /* |
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211 | * Decimal and hexadecimal conversions. |
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212 | */ |
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213 | case 'd': |
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214 | print_number(va_arg(ap, __native), 10); |
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215 | goto loop; |
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216 | |||
217 | case 'X': |
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953 | decky | 218 | puts("0x"); |
885 | decky | 219 | case 'x': |
220 | print_number(va_arg(ap, __native), 16); |
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221 | goto loop; |
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222 | |||
223 | /* |
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224 | * Bad formatting. |
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225 | */ |
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226 | default: |
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227 | goto out; |
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228 | } |
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229 | |||
230 | default: |
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1133 | decky | 231 | if (c == '\n') |
232 | ofw_write("\r", 1); |
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885 | decky | 233 | ofw_write(&c, 1); |
234 | } |
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235 | |||
236 | loop: |
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237 | ; |
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238 | } |
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239 | |||
240 | out: |
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241 | |||
242 | va_end(ap); |
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243 | } |