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1 | /* |
1 | /* |
2 | * Copyright (c) 2006 Martin Decky |
2 | * Copyright (c) 2006 Martin Decky |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup generic |
29 | /** @addtogroup generic |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #include "printf.h" |
35 | #include "printf.h" |
36 | #include "stdarg.h" |
36 | #include "stdarg.h" |
37 | #include <types.h> |
37 | #include <types.h> |
38 | 38 | ||
39 | typedef char *char_ptr; |
39 | typedef char *char_ptr; |
40 | 40 | ||
41 | static char digits[] = "0123456789abcdef"; /**< Hexadecimal characters */ |
41 | static char digits[] = "0123456789abcdef"; /**< Hexadecimal characters */ |
42 | 42 | ||
43 | void puts(const char *str) |
43 | void puts(const char *str) |
44 | { |
44 | { |
45 | int len = 0; |
45 | int len = 0; |
46 | 46 | ||
47 | while (str[len] != 0) |
47 | while (str[len] != 0) |
48 | len++; |
48 | len++; |
49 | 49 | ||
50 | write(str, len); |
50 | write(str, len); |
51 | } |
51 | } |
52 | 52 | ||
53 | 53 | ||
54 | /** Print hexadecimal digits |
54 | /** Print hexadecimal digits |
55 | * |
55 | * |
56 | * Print fixed count of hexadecimal digits from |
56 | * Print fixed count of hexadecimal digits from |
57 | * the number num. The digits are printed in |
57 | * the number num. The digits are printed in |
58 | * natural left-to-right order starting with |
58 | * natural left-to-right order starting with |
59 | * the width-th digit. |
59 | * the width-th digit. |
60 | * |
60 | * |
61 | * @param num Number containing digits. |
61 | * @param num Number containing digits. |
62 | * @param width Count of digits to print. |
62 | * @param width Count of digits to print. |
63 | * |
63 | * |
64 | */ |
64 | */ |
65 | static void print_fixed_hex(const uint64_t num, const int width) |
65 | static void print_fixed_hex(const uint64_t num, const int width) |
66 | { |
66 | { |
67 | int i; |
67 | int i; |
68 | 68 | ||
69 | for (i = width * 8 - 4; i >= 0; i -= 4) |
69 | for (i = width * 8 - 4; i >= 0; i -= 4) |
70 | write(digits + ((num >> i) & 0xf), 1); |
70 | write(digits + ((num >> i) & 0xf), 1); |
71 | } |
71 | } |
72 | 72 | ||
73 | 73 | ||
74 | /** Print number in given base |
74 | /** Print number in given base |
75 | * |
75 | * |
76 | * Print significant digits of a number in given |
76 | * Print significant digits of a number in given |
77 | * base. |
77 | * base. |
78 | * |
78 | * |
79 | * @param num Number to print. |
79 | * @param num Number to print. |
80 | * @param base Base to print the number in (should |
80 | * @param base Base to print the number in (should |
81 | * be in range 2 .. 16). |
81 | * be in range 2 .. 16). |
82 | * |
82 | * |
83 | */ |
83 | */ |
84 | static void print_number(const unative_t num, const unsigned int base) |
84 | static void print_number(const unative_t num, const unsigned int base) |
85 | { |
85 | { |
86 | int val = num; |
86 | int val = num; |
- | 87 | ||
- | 88 | /* This is enough even for base 2. */ |
|
87 | char d[sizeof(unative_t) * 8 + 1]; /* this is good enough even for base == 2 */ |
89 | char d[sizeof(unative_t) * 8 + 1]; |
88 | int i = sizeof(unative_t) * 8 - 1; |
90 | int i = sizeof(unative_t) * 8 - 1; |
89 | 91 | ||
90 | do { |
92 | do { |
91 | d[i--] = digits[val % base]; |
93 | d[i--] = digits[val % base]; |
92 | } while (val /= base); |
94 | } while (val /= base); |
93 | 95 | ||
94 | d[sizeof(unative_t) * 8] = 0; |
96 | d[sizeof(unative_t) * 8] = 0; |
95 | puts(&d[i + 1]); |
97 | puts(&d[i + 1]); |
96 | } |
98 | } |
97 | 99 | ||
98 | 100 | ||
99 | /** General formatted text print |
101 | /** General formatted text print |
100 | * |
102 | * |
101 | * Print text formatted according the fmt parameter |
103 | * Print text formatted according the fmt parameter |
102 | * and variant arguments. Each formatting directive |
104 | * and variant arguments. Each formatting directive |
103 | * begins with \% (percentage) character and one of the |
105 | * begins with \% (percentage) character and one of the |
104 | * following character: |
106 | * following character: |
105 | * |
107 | * |
106 | * \% Prints the percentage character. |
108 | * \% Prints the percentage character. |
107 | * |
109 | * |
108 | * s The next variant argument is treated as char* |
110 | * s The next variant argument is treated as char* |
109 | * and printed as a NULL terminated string. |
111 | * and printed as a NULL terminated string. |
110 | * |
112 | * |
111 | * c The next variant argument is treated as a single char. |
113 | * c The next variant argument is treated as a single char. |
112 | * |
114 | * |
113 | * p The next variant argument is treated as a maximum |
115 | * p The next variant argument is treated as a maximum |
114 | * bit-width integer with respect to architecture |
116 | * bit-width integer with respect to architecture |
115 | * and printed in full hexadecimal width. |
117 | * and printed in full hexadecimal width. |
116 | * |
118 | * |
117 | * P As with 'p', but '0x' is prefixed. |
119 | * P As with 'p', but '0x' is prefixed. |
118 | * |
120 | * |
119 | * q The next variant argument is treated as a 64b integer |
121 | * q The next variant argument is treated as a 64b integer |
120 | * and printed in full hexadecimal width. |
122 | * and printed in full hexadecimal width. |
121 | * |
123 | * |
122 | * Q As with 'q', but '0x' is prefixed. |
124 | * Q As with 'q', but '0x' is prefixed. |
123 | * |
125 | * |
124 | * l The next variant argument is treated as a 32b integer |
126 | * l The next variant argument is treated as a 32b integer |
125 | * and printed in full hexadecimal width. |
127 | * and printed in full hexadecimal width. |
126 | * |
128 | * |
127 | * L As with 'l', but '0x' is prefixed. |
129 | * L As with 'l', but '0x' is prefixed. |
128 | * |
130 | * |
129 | * w The next variant argument is treated as a 16b integer |
131 | * w The next variant argument is treated as a 16b integer |
130 | * and printed in full hexadecimal width. |
132 | * and printed in full hexadecimal width. |
131 | * |
133 | * |
132 | * W As with 'w', but '0x' is prefixed. |
134 | * W As with 'w', but '0x' is prefixed. |
133 | * |
135 | * |
134 | * b The next variant argument is treated as a 8b integer |
136 | * b The next variant argument is treated as a 8b integer |
135 | * and printed in full hexadecimal width. |
137 | * and printed in full hexadecimal width. |
136 | * |
138 | * |
137 | * B As with 'b', but '0x' is prefixed. |
139 | * B As with 'b', but '0x' is prefixed. |
138 | * |
140 | * |
139 | * d The next variant argument is treated as integer |
141 | * d The next variant argument is treated as integer |
140 | * and printed in standard decimal format (only significant |
142 | * and printed in standard decimal format (only significant |
141 | * digits). |
143 | * digits). |
142 | * |
144 | * |
143 | * x The next variant argument is treated as integer |
145 | * x The next variant argument is treated as integer |
144 | * and printed in standard hexadecimal format (only significant |
146 | * and printed in standard hexadecimal format (only significant |
145 | * digits). |
147 | * digits). |
146 | * |
148 | * |
147 | * X As with 'x', but '0x' is prefixed. |
149 | * X As with 'x', but '0x' is prefixed. |
148 | * |
150 | * |
149 | * All other characters from fmt except the formatting directives |
151 | * All other characters from fmt except the formatting directives |
150 | * are printed in verbatim. |
152 | * are printed in verbatim. |
151 | * |
153 | * |
152 | * @param fmt Formatting NULL terminated string. |
154 | * @param fmt Formatting NULL terminated string. |
153 | */ |
155 | */ |
154 | void printf(const char *fmt, ...) |
156 | void printf(const char *fmt, ...) |
155 | { |
157 | { |
156 | int i = 0; |
158 | int i = 0; |
157 | va_list ap; |
159 | va_list ap; |
158 | char c; |
160 | char c; |
159 | 161 | ||
160 | va_start(ap, fmt); |
162 | va_start(ap, fmt); |
161 | 163 | ||
162 | while ((c = fmt[i++])) { |
164 | while ((c = fmt[i++])) { |
163 | switch (c) { |
165 | switch (c) { |
164 | 166 | ||
165 | /* control character */ |
167 | /* control character */ |
- | 168 | case '%': |
|
- | 169 | ||
- | 170 | switch (c = fmt[i++]) { |
|
- | 171 | ||
- | 172 | /* percentile itself */ |
|
166 | case '%': |
173 | case '%': |
- | 174 | break; |
|
- | 175 | ||
- | 176 | /* |
|
- | 177 | * String and character conversions. |
|
- | 178 | */ |
|
- | 179 | case 's': |
|
- | 180 | puts(va_arg(ap, char_ptr)); |
|
- | 181 | goto loop; |
|
- | 182 | ||
- | 183 | case 'c': |
|
- | 184 | c = (char) va_arg(ap, int); |
|
- | 185 | break; |
|
- | 186 | ||
- | 187 | /* |
|
- | 188 | * Hexadecimal conversions with fixed width. |
|
- | 189 | */ |
|
- | 190 | case 'P': |
|
- | 191 | puts("0x"); |
|
- | 192 | case 'p': |
|
- | 193 | print_fixed_hex(va_arg(ap, unative_t), |
|
- | 194 | sizeof(unative_t)); |
|
- | 195 | goto loop; |
|
- | 196 | ||
- | 197 | case 'Q': |
|
- | 198 | puts("0x"); |
|
- | 199 | case 'q': |
|
- | 200 | print_fixed_hex(va_arg(ap, uint64_t), INT64); |
|
- | 201 | goto loop; |
|
- | 202 | ||
- | 203 | case 'L': |
|
- | 204 | puts("0x"); |
|
- | 205 | case 'l': |
|
- | 206 | print_fixed_hex(va_arg(ap, unative_t), INT32); |
|
- | 207 | goto loop; |
|
- | 208 | ||
- | 209 | case 'W': |
|
- | 210 | puts("0x"); |
|
- | 211 | case 'w': |
|
- | 212 | print_fixed_hex(va_arg(ap, unative_t), INT16); |
|
- | 213 | goto loop; |
|
- | 214 | ||
- | 215 | case 'B': |
|
- | 216 | puts("0x"); |
|
- | 217 | case 'b': |
|
- | 218 | print_fixed_hex(va_arg(ap, unative_t), INT8); |
|
- | 219 | goto loop; |
|
- | 220 | ||
- | 221 | /* |
|
- | 222 | * Decimal and hexadecimal conversions. |
|
- | 223 | */ |
|
- | 224 | case 'd': |
|
- | 225 | print_number(va_arg(ap, unative_t), 10); |
|
- | 226 | goto loop; |
|
167 | 227 | ||
168 | switch (c = fmt[i++]) { |
- | |
169 | - | ||
170 | /* percentile itself */ |
- | |
171 | case '%': |
- | |
172 | break; |
- | |
173 | - | ||
174 | /* |
- | |
175 | * String and character conversions. |
- | |
176 | */ |
- | |
177 | case 's': |
- | |
178 | puts(va_arg(ap, char_ptr)); |
- | |
179 | goto loop; |
- | |
180 | - | ||
181 | case 'c': |
- | |
182 | c = (char) va_arg(ap, int); |
- | |
183 | break; |
- | |
184 | - | ||
185 | /* |
- | |
186 | * Hexadecimal conversions with fixed width. |
- | |
187 | */ |
- | |
188 | case 'P': |
- | |
189 | puts("0x"); |
- | |
190 | case 'p': |
- | |
191 | print_fixed_hex(va_arg(ap, unative_t), sizeof(unative_t)); |
- | |
192 | goto loop; |
- | |
193 | - | ||
194 | case 'Q': |
- | |
195 | puts("0x"); |
- | |
196 | case 'q': |
- | |
197 | print_fixed_hex(va_arg(ap, uint64_t), INT64); |
- | |
198 | goto loop; |
- | |
199 | - | ||
200 | case 'L': |
- | |
201 | puts("0x"); |
- | |
202 | case 'l': |
- | |
203 | print_fixed_hex(va_arg(ap, unative_t), INT32); |
- | |
204 | goto loop; |
- | |
205 | - | ||
206 | case 'W': |
- | |
207 | puts("0x"); |
- | |
208 | case 'w': |
- | |
209 | print_fixed_hex(va_arg(ap, unative_t), INT16); |
- | |
210 | goto loop; |
- | |
211 | - | ||
212 | case 'B': |
- | |
213 | puts("0x"); |
- | |
214 | case 'b': |
- | |
215 | print_fixed_hex(va_arg(ap, unative_t), INT8); |
- | |
216 | goto loop; |
- | |
217 | - | ||
218 | /* |
- | |
219 | * Decimal and hexadecimal conversions. |
- | |
220 | */ |
- | |
221 | case 'd': |
- | |
222 | print_number(va_arg(ap, unative_t), 10); |
- | |
223 | goto loop; |
- | |
224 | - | ||
225 | case 'X': |
228 | case 'X': |
226 | puts("0x"); |
229 | puts("0x"); |
227 | case 'x': |
230 | case 'x': |
228 | print_number(va_arg(ap, unative_t), 16); |
231 | print_number(va_arg(ap, unative_t), 16); |
229 | goto loop; |
232 | goto loop; |
230 | 233 | ||
231 | /* |
234 | /* |
232 | * Bad formatting. |
235 | * Bad formatting. |
233 | */ |
236 | */ |
234 | default: |
- | |
235 | goto out; |
- | |
236 | } |
- | |
237 | - | ||
238 | default: |
237 | default: |
- | 238 | goto out; |
|
- | 239 | } |
|
- | 240 | ||
- | 241 | default: |
|
239 | write(&c, 1); |
242 | write(&c, 1); |
240 | } |
243 | } |
241 | - | ||
242 | loop: |
244 | loop: |
243 | ; |
245 | ; |
244 | } |
246 | } |
245 | 247 | ||
246 | out: |
248 | out: |
247 | 249 | ||
248 | va_end(ap); |
250 | va_end(ap); |
249 | } |
251 | } |
250 | 252 | ||
251 | /** @} |
253 | /** @} |
252 | */ |
254 | */ |
253 | 255 |