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Rev | Author | Line No. | Line |
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1018 | decky | 1 | /* |
2071 | jermar | 2 | * Copyright (c) 2006 Martin Decky |
1018 | decky | 3 | * All rights reserved. |
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 | |||
2465 | jermar | 29 | /** @addtogroup generic |
30 | * @{ |
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31 | */ |
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32 | /** @file |
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33 | */ |
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34 | |||
1018 | decky | 35 | #include "printf.h" |
1763 | jermar | 36 | #include "stdarg.h" |
37 | #include <types.h> |
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1018 | decky | 38 | |
1763 | jermar | 39 | typedef char *char_ptr; |
40 | |||
1018 | decky | 41 | static char digits[] = "0123456789abcdef"; /**< Hexadecimal characters */ |
42 | |||
43 | void puts(const char *str) |
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44 | { |
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45 | int len = 0; |
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46 | |||
47 | while (str[len] != 0) |
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48 | len++; |
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49 | |||
50 | write(str, len); |
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51 | } |
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52 | |||
53 | |||
54 | /** Print hexadecimal digits |
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55 | * |
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56 | * Print fixed count of hexadecimal digits from |
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57 | * the number num. The digits are printed in |
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58 | * natural left-to-right order starting with |
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59 | * the width-th digit. |
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60 | * |
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61 | * @param num Number containing digits. |
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62 | * @param width Count of digits to print. |
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63 | * |
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64 | */ |
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1779 | jermar | 65 | static void print_fixed_hex(const uint64_t num, const int width) |
1018 | decky | 66 | { |
67 | int i; |
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68 | |||
69 | for (i = width * 8 - 4; i >= 0; i -= 4) |
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70 | write(digits + ((num >> i) & 0xf), 1); |
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71 | } |
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72 | |||
73 | |||
74 | /** Print number in given base |
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75 | * |
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76 | * Print significant digits of a number in given |
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77 | * base. |
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78 | * |
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79 | * @param num Number to print. |
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80 | * @param base Base to print the number in (should |
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81 | * be in range 2 .. 16). |
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82 | * |
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83 | */ |
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1779 | jermar | 84 | static void print_number(const unative_t num, const unsigned int base) |
1018 | decky | 85 | { |
86 | int val = num; |
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1779 | jermar | 87 | char d[sizeof(unative_t) * 8 + 1]; /* this is good enough even for base == 2 */ |
88 | int i = sizeof(unative_t) * 8 - 1; |
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1018 | decky | 89 | |
90 | do { |
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91 | d[i--] = digits[val % base]; |
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92 | } while (val /= base); |
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93 | |||
1779 | jermar | 94 | d[sizeof(unative_t) * 8] = 0; |
1018 | decky | 95 | puts(&d[i + 1]); |
96 | } |
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97 | |||
98 | |||
99 | /** General formatted text print |
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100 | * |
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101 | * Print text formatted according the fmt parameter |
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102 | * and variant arguments. Each formatting directive |
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103 | * begins with \% (percentage) character and one of the |
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104 | * following character: |
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105 | * |
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106 | * \% Prints the percentage character. |
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107 | * |
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108 | * s The next variant argument is treated as char* |
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109 | * and printed as a NULL terminated string. |
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110 | * |
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111 | * c The next variant argument is treated as a single char. |
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112 | * |
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113 | * p The next variant argument is treated as a maximum |
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114 | * bit-width integer with respect to architecture |
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115 | * and printed in full hexadecimal width. |
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116 | * |
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117 | * P As with 'p', but '0x' is prefixed. |
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118 | * |
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119 | * q The next variant argument is treated as a 64b integer |
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120 | * and printed in full hexadecimal width. |
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121 | * |
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122 | * Q As with 'q', but '0x' is prefixed. |
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123 | * |
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124 | * l The next variant argument is treated as a 32b integer |
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125 | * and printed in full hexadecimal width. |
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126 | * |
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127 | * L As with 'l', but '0x' is prefixed. |
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128 | * |
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129 | * w The next variant argument is treated as a 16b integer |
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130 | * and printed in full hexadecimal width. |
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131 | * |
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132 | * W As with 'w', but '0x' is prefixed. |
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133 | * |
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134 | * b The next variant argument is treated as a 8b integer |
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135 | * and printed in full hexadecimal width. |
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136 | * |
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137 | * B As with 'b', but '0x' is prefixed. |
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138 | * |
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139 | * d The next variant argument is treated as integer |
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140 | * and printed in standard decimal format (only significant |
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141 | * digits). |
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142 | * |
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143 | * x The next variant argument is treated as integer |
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144 | * and printed in standard hexadecimal format (only significant |
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145 | * digits). |
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146 | * |
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147 | * X As with 'x', but '0x' is prefixed. |
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148 | * |
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149 | * All other characters from fmt except the formatting directives |
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150 | * are printed in verbatim. |
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151 | * |
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152 | * @param fmt Formatting NULL terminated string. |
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153 | */ |
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154 | void printf(const char *fmt, ...) |
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155 | { |
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156 | int i = 0; |
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157 | va_list ap; |
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158 | char c; |
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159 | |||
160 | va_start(ap, fmt); |
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161 | |||
162 | while ((c = fmt[i++])) { |
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163 | switch (c) { |
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164 | |||
165 | /* control character */ |
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166 | case '%': |
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167 | |||
168 | switch (c = fmt[i++]) { |
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169 | |||
170 | /* percentile itself */ |
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171 | case '%': |
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172 | break; |
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173 | |||
174 | /* |
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175 | * String and character conversions. |
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176 | */ |
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177 | case 's': |
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178 | puts(va_arg(ap, char_ptr)); |
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179 | goto loop; |
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180 | |||
181 | case 'c': |
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182 | c = (char) va_arg(ap, int); |
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183 | break; |
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184 | |||
185 | /* |
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186 | * Hexadecimal conversions with fixed width. |
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187 | */ |
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188 | case 'P': |
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189 | puts("0x"); |
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190 | case 'p': |
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1779 | jermar | 191 | print_fixed_hex(va_arg(ap, unative_t), sizeof(unative_t)); |
1018 | decky | 192 | goto loop; |
193 | |||
194 | case 'Q': |
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195 | puts("0x"); |
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196 | case 'q': |
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1779 | jermar | 197 | print_fixed_hex(va_arg(ap, uint64_t), INT64); |
1018 | decky | 198 | goto loop; |
199 | |||
200 | case 'L': |
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201 | puts("0x"); |
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202 | case 'l': |
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1779 | jermar | 203 | print_fixed_hex(va_arg(ap, unative_t), INT32); |
1018 | decky | 204 | goto loop; |
205 | |||
206 | case 'W': |
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207 | puts("0x"); |
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208 | case 'w': |
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1779 | jermar | 209 | print_fixed_hex(va_arg(ap, unative_t), INT16); |
1018 | decky | 210 | goto loop; |
211 | |||
212 | case 'B': |
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213 | puts("0x"); |
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214 | case 'b': |
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1779 | jermar | 215 | print_fixed_hex(va_arg(ap, unative_t), INT8); |
1018 | decky | 216 | goto loop; |
217 | |||
218 | /* |
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219 | * Decimal and hexadecimal conversions. |
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220 | */ |
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221 | case 'd': |
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1779 | jermar | 222 | print_number(va_arg(ap, unative_t), 10); |
1018 | decky | 223 | goto loop; |
224 | |||
225 | case 'X': |
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226 | puts("0x"); |
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227 | case 'x': |
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1779 | jermar | 228 | print_number(va_arg(ap, unative_t), 16); |
1018 | decky | 229 | goto loop; |
230 | |||
231 | /* |
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232 | * Bad formatting. |
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233 | */ |
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234 | default: |
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235 | goto out; |
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236 | } |
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237 | |||
238 | default: |
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239 | write(&c, 1); |
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240 | } |
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241 | |||
242 | loop: |
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243 | ; |
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244 | } |
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245 | |||
246 | out: |
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247 | |||
248 | va_end(ap); |
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249 | } |
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2465 | jermar | 250 | |
251 | /** @} |
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252 | */ |