Rev 1199 | Go to most recent revision | Only display areas with differences | Ignore whitespace | Details | Blame | Last modification | View Log | RSS feed
| Rev 1199 | Rev 1225 | ||
|---|---|---|---|
| 1 | /* |
1 | /* |
| 2 | * Copyright (C) 2001-2004 Jakub Jermar |
2 | * Copyright (C) 2001-2004 Jakub Jermar |
| 3 | * Copyright (C) 2006 Josef Cejka |
3 | * Copyright (C) 2006 Josef Cejka |
| 4 | * All rights reserved. |
4 | * All rights reserved. |
| 5 | * |
5 | * |
| 6 | * Redistribution and use in source and binary forms, with or without |
6 | * Redistribution and use in source and binary forms, with or without |
| 7 | * modification, are permitted provided that the following conditions |
7 | * modification, are permitted provided that the following conditions |
| 8 | * are met: |
8 | * are met: |
| 9 | * |
9 | * |
| 10 | * - Redistributions of source code must retain the above copyright |
10 | * - Redistributions of source code must retain the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer. |
11 | * notice, this list of conditions and the following disclaimer. |
| 12 | * - Redistributions in binary form must reproduce the above copyright |
12 | * - Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
14 | * documentation and/or other materials provided with the distribution. |
| 15 | * - The name of the author may not be used to endorse or promote products |
15 | * - The name of the author may not be used to endorse or promote products |
| 16 | * derived from this software without specific prior written permission. |
16 | * derived from this software without specific prior written permission. |
| 17 | * |
17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
28 | */ |
| 29 | 29 | ||
| 30 | #include <stdio.h> |
30 | #include <stdio.h> |
| 31 | #include <unistd.h> |
31 | #include <unistd.h> |
| 32 | #include <io/io.h> |
32 | #include <io/io.h> |
| 33 | #include <stdarg.h> |
33 | #include <stdarg.h> |
| 34 | #include <ctype.h> |
34 | #include <ctype.h> |
| 35 | #include <string.h> |
35 | #include <string.h> |
| 36 | 36 | ||
| 37 | #define __PRINTF_FLAG_PREFIX 0x00000001 /* show prefixes 0x or 0*/ |
37 | #define __PRINTF_FLAG_PREFIX 0x00000001 /* show prefixes 0x or 0*/ |
| 38 | #define __PRINTF_FLAG_SIGNED 0x00000002 /* signed / unsigned number */ |
38 | #define __PRINTF_FLAG_SIGNED 0x00000002 /* signed / unsigned number */ |
| 39 | #define __PRINTF_FLAG_ZEROPADDED 0x00000004 /* print leading zeroes */ |
39 | #define __PRINTF_FLAG_ZEROPADDED 0x00000004 /* print leading zeroes */ |
| 40 | #define __PRINTF_FLAG_LEFTALIGNED 0x00000010 /* align to left */ |
40 | #define __PRINTF_FLAG_LEFTALIGNED 0x00000010 /* align to left */ |
| 41 | #define __PRINTF_FLAG_SHOWPLUS 0x00000020 /* always show + sign */ |
41 | #define __PRINTF_FLAG_SHOWPLUS 0x00000020 /* always show + sign */ |
| 42 | #define __PRINTF_FLAG_SPACESIGN 0x00000040 /* print space instead of plus */ |
42 | #define __PRINTF_FLAG_SPACESIGN 0x00000040 /* print space instead of plus */ |
| 43 | #define __PRINTF_FLAG_BIGCHARS 0x00000080 /* show big characters */ |
43 | #define __PRINTF_FLAG_BIGCHARS 0x00000080 /* show big characters */ |
| 44 | #define __PRINTF_FLAG_NEGATIVE 0x00000100 /* number has - sign */ |
44 | #define __PRINTF_FLAG_NEGATIVE 0x00000100 /* number has - sign */ |
| 45 | 45 | ||
| 46 | #define PRINT_NUMBER_BUFFER_SIZE (64+5) /* Buffer big enought for 64 bit number |
46 | #define PRINT_NUMBER_BUFFER_SIZE (64+5) /* Buffer big enought for 64 bit number |
| 47 | * printed in base 2, sign, prefix and |
47 | * printed in base 2, sign, prefix and |
| 48 | * 0 to terminate string.. (last one is only for better testing |
48 | * 0 to terminate string.. (last one is only for better testing |
| 49 | * end of buffer by zero-filling subroutine) |
49 | * end of buffer by zero-filling subroutine) |
| 50 | */ |
50 | */ |
| 51 | typedef enum { |
51 | typedef enum { |
| 52 | PrintfQualifierByte = 0, |
52 | PrintfQualifierByte = 0, |
| 53 | PrintfQualifierShort, |
53 | PrintfQualifierShort, |
| 54 | PrintfQualifierInt, |
54 | PrintfQualifierInt, |
| 55 | PrintfQualifierLong, |
55 | PrintfQualifierLong, |
| 56 | PrintfQualifierLongLong, |
56 | PrintfQualifierLongLong, |
| 57 | PrintfQualifierSizeT, |
57 | PrintfQualifierSizeT, |
| 58 | PrintfQualifierPointer |
58 | PrintfQualifierPointer |
| 59 | } qualifier_t; |
59 | } qualifier_t; |
| 60 | 60 | ||
| 61 | static char digits_small[] = "0123456789abcdef"; /* Small hexadecimal characters */ |
61 | static char digits_small[] = "0123456789abcdef"; /* Small hexadecimal characters */ |
| 62 | static char digits_big[] = "0123456789ABCDEF"; /* Big hexadecimal characters */ |
62 | static char digits_big[] = "0123456789ABCDEF"; /* Big hexadecimal characters */ |
| 63 | 63 | ||
| 64 | 64 | ||
| 65 | /** Print one formatted character |
65 | /** Print one formatted character |
| 66 | * @param c character to print |
66 | * @param c character to print |
| 67 | * @param width |
67 | * @param width |
| 68 | * @param flags |
68 | * @param flags |
| 69 | * @return number of printed characters or EOF |
69 | * @return number of printed characters or EOF |
| 70 | */ |
70 | */ |
| 71 | static int print_char(char c, int width, uint64_t flags) |
71 | static int print_char(char c, int width, uint64_t flags) |
| 72 | { |
72 | { |
| 73 | int counter = 0; |
73 | int counter = 0; |
| 74 | 74 | ||
| 75 | if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) { |
75 | if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) { |
| 76 | while (--width > 0) { /* one space is consumed by character itself hence predecrement */ |
76 | while (--width > 0) { /* one space is consumed by character itself hence predecrement */ |
| 77 | /* FIXME: painful slow */ |
77 | /* FIXME: painful slow */ |
| 78 | putchar(' '); |
78 | putchar(' '); |
| 79 | ++counter; |
79 | ++counter; |
| 80 | } |
80 | } |
| 81 | } |
81 | } |
| 82 | 82 | ||
| 83 | if (putchar(c) == EOF) { |
83 | if (putchar(c) == EOF) { |
| 84 | return EOF; |
84 | return EOF; |
| 85 | } |
85 | } |
| 86 | 86 | ||
| 87 | while (--width > 0) { /* one space is consumed by character itself hence predecrement */ |
87 | while (--width > 0) { /* one space is consumed by character itself hence predecrement */ |
| 88 | putchar(' '); |
88 | putchar(' '); |
| 89 | ++counter; |
89 | ++counter; |
| 90 | } |
90 | } |
| 91 | 91 | ||
| 92 | return ++counter; |
92 | return ++counter; |
| 93 | } |
93 | } |
| 94 | 94 | ||
| 95 | /** Print one string |
95 | /** Print one string |
| 96 | * @param s string |
96 | * @param s string |
| 97 | * @param width |
97 | * @param width |
| 98 | * @param precision |
98 | * @param precision |
| 99 | * @param flags |
99 | * @param flags |
| 100 | * @return number of printed characters or EOF |
100 | * @return number of printed characters or EOF |
| 101 | */ |
101 | */ |
| 102 | 102 | ||
| 103 | static int print_string(char *s, int width, int precision, uint64_t flags) |
103 | static int print_string(char *s, int width, int precision, uint64_t flags) |
| 104 | { |
104 | { |
| 105 | int counter = 0; |
105 | int counter = 0; |
| 106 | size_t size; |
106 | size_t size; |
| 107 | 107 | ||
| 108 | if (s == NULL) { |
108 | if (s == NULL) { |
| 109 | return putstr("(NULL)"); |
109 | return putstr("(NULL)"); |
| 110 | } |
110 | } |
| 111 | 111 | ||
| 112 | size = strlen(s); |
112 | size = strlen(s); |
| 113 | 113 | ||
| 114 | /* print leading spaces */ |
114 | /* print leading spaces */ |
| 115 | 115 | ||
| 116 | if (precision == 0) |
116 | if (precision == 0) |
| 117 | precision = size; |
117 | precision = size; |
| 118 | 118 | ||
| 119 | width -= precision; |
119 | width -= precision; |
| 120 | 120 | ||
| 121 | if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) { |
121 | if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) { |
| 122 | while (width-- > 0) { |
122 | while (width-- > 0) { |
| 123 | putchar(' '); |
123 | putchar(' '); |
| 124 | counter++; |
124 | counter++; |
| 125 | } |
125 | } |
| 126 | } |
126 | } |
| 127 | 127 | ||
| 128 | while (precision > size) { |
128 | while (precision > size) { |
| 129 | precision--; |
129 | precision--; |
| 130 | putchar(' '); |
130 | putchar(' '); |
| 131 | ++counter; |
131 | ++counter; |
| 132 | } |
132 | } |
| 133 | 133 | ||
| 134 | if (putnchars(s, precision) == EOF) { |
134 | if (putnchars(s, precision) == EOF) { |
| 135 | return EOF; |
135 | return EOF; |
| 136 | } |
136 | } |
| 137 | 137 | ||
| 138 | counter += precision; |
138 | counter += precision; |
| 139 | 139 | ||
| 140 | while (width-- > 0) { |
140 | while (width-- > 0) { |
| 141 | putchar(' '); |
141 | putchar(' '); |
| 142 | ++counter; |
142 | ++counter; |
| 143 | } |
143 | } |
| 144 | 144 | ||
| 145 | return ++counter; |
145 | return ++counter; |
| 146 | } |
146 | } |
| 147 | 147 | ||
| 148 | 148 | ||
| 149 | /** Print number in given base |
149 | /** Print number in given base |
| 150 | * |
150 | * |
| 151 | * Print significant digits of a number in given |
151 | * Print significant digits of a number in given |
| 152 | * base. |
152 | * base. |
| 153 | * |
153 | * |
| 154 | * @param num Number to print. |
154 | * @param num Number to print. |
| 155 | * @param width |
155 | * @param width |
| 156 | * @param precision |
156 | * @param precision |
| 157 | * @param base Base to print the number in (should |
157 | * @param base Base to print the number in (should |
| 158 | * be in range 2 .. 16). |
158 | * be in range 2 .. 16). |
| 159 | * @param flags output modifiers |
159 | * @param flags output modifiers |
| 160 | * @return number of written characters or EOF |
160 | * @return number of written characters or EOF |
| 161 | * |
161 | * |
| 162 | */ |
162 | */ |
| 163 | static int print_number(uint64_t num, int width, int precision, int base , uint64_t flags) |
163 | static int print_number(uint64_t num, int width, int precision, int base , uint64_t flags) |
| 164 | { |
164 | { |
| 165 | char *digits = digits_small; |
165 | char *digits = digits_small; |
| 166 | char d[PRINT_NUMBER_BUFFER_SIZE]; /* this is good enough even for base == 2, prefix and sign */ |
166 | char d[PRINT_NUMBER_BUFFER_SIZE]; /* this is good enough even for base == 2, prefix and sign */ |
| 167 | char *ptr = &d[PRINT_NUMBER_BUFFER_SIZE - 1]; |
167 | char *ptr = &d[PRINT_NUMBER_BUFFER_SIZE - 1]; |
| - | 168 | int size = 0; /* size of number with all prefixes and signs */ |
|
| 168 | int size = 0; |
169 | int number_size; /* size of plain number */ |
| 169 | int written = 0; |
170 | int written = 0; |
| 170 | char sgn; |
171 | char sgn; |
| 171 | 172 | ||
| 172 | if (flags & __PRINTF_FLAG_BIGCHARS) |
173 | if (flags & __PRINTF_FLAG_BIGCHARS) |
| 173 | digits = digits_big; |
174 | digits = digits_big; |
| 174 | 175 | ||
| 175 | *ptr-- = 0; /* Put zero at end of string */ |
176 | *ptr-- = 0; /* Put zero at end of string */ |
| 176 | 177 | ||
| 177 | if (num == 0) { |
178 | if (num == 0) { |
| 178 | *ptr-- = '0'; |
179 | *ptr-- = '0'; |
| 179 | size++; |
180 | size++; |
| 180 | } else { |
181 | } else { |
| 181 | do { |
182 | do { |
| 182 | *ptr-- = digits[num % base]; |
183 | *ptr-- = digits[num % base]; |
| 183 | size++; |
184 | size++; |
| 184 | } while (num /= base); |
185 | } while (num /= base); |
| 185 | } |
186 | } |
| - | 187 | ||
| - | 188 | number_size = size; |
|
| 186 | 189 | ||
| 187 | /* Collect sum of all prefixes/signs/... to calculate padding and leading zeroes */ |
190 | /* Collect sum of all prefixes/signs/... to calculate padding and leading zeroes */ |
| 188 | if (flags & __PRINTF_FLAG_PREFIX) { |
191 | if (flags & __PRINTF_FLAG_PREFIX) { |
| 189 | switch(base) { |
192 | switch(base) { |
| 190 | case 2: /* Binary formating is not standard, but usefull */ |
193 | case 2: /* Binary formating is not standard, but usefull */ |
| 191 | size += 2; |
194 | size += 2; |
| 192 | break; |
195 | break; |
| 193 | case 8: |
196 | case 8: |
| 194 | size++; |
197 | size++; |
| 195 | break; |
198 | break; |
| 196 | case 16: |
199 | case 16: |
| 197 | size += 2; |
200 | size += 2; |
| 198 | break; |
201 | break; |
| 199 | } |
202 | } |
| 200 | } |
203 | } |
| 201 | 204 | ||
| 202 | sgn = 0; |
205 | sgn = 0; |
| 203 | if (flags & __PRINTF_FLAG_SIGNED) { |
206 | if (flags & __PRINTF_FLAG_SIGNED) { |
| 204 | if (flags & __PRINTF_FLAG_NEGATIVE) { |
207 | if (flags & __PRINTF_FLAG_NEGATIVE) { |
| 205 | sgn = '-'; |
208 | sgn = '-'; |
| 206 | size++; |
209 | size++; |
| 207 | } else if (flags & __PRINTF_FLAG_SHOWPLUS) { |
210 | } else if (flags & __PRINTF_FLAG_SHOWPLUS) { |
| 208 | sgn = '+'; |
211 | sgn = '+'; |
| 209 | size++; |
212 | size++; |
| 210 | } else if (flags & __PRINTF_FLAG_SPACESIGN) { |
213 | } else if (flags & __PRINTF_FLAG_SPACESIGN) { |
| 211 | sgn = ' '; |
214 | sgn = ' '; |
| 212 | size++; |
215 | size++; |
| 213 | } |
216 | } |
| 214 | } |
217 | } |
| 215 | 218 | ||
| 216 | if (flags & __PRINTF_FLAG_LEFTALIGNED) { |
219 | if (flags & __PRINTF_FLAG_LEFTALIGNED) { |
| 217 | flags &= ~__PRINTF_FLAG_ZEROPADDED; |
220 | flags &= ~__PRINTF_FLAG_ZEROPADDED; |
| 218 | } |
221 | } |
| 219 | 222 | ||
| 220 | /* if number is leftaligned or precision is specified then zeropadding is ignored */ |
223 | /* if number is leftaligned or precision is specified then zeropadding is ignored */ |
| 221 | if (flags & __PRINTF_FLAG_ZEROPADDED) { |
224 | if (flags & __PRINTF_FLAG_ZEROPADDED) { |
| 222 | if ((precision == 0) && (width > size)) { |
225 | if ((precision == 0) && (width > size)) { |
| 223 | precision = width - size; |
226 | precision = width - size + number_size; |
| 224 | } |
227 | } |
| 225 | } |
228 | } |
| 226 | 229 | ||
| 227 | /* print leading spaces */ |
230 | /* print leading spaces */ |
| 228 | if (size > precision) /* We must print whole number not only a part */ |
231 | if (number_size > precision) /* We must print whole number not only a part */ |
| 229 | precision = size; |
232 | precision = number_size; |
| 230 | 233 | ||
| 231 | width -= precision; |
234 | width -= precision + size - number_size; |
| 232 | 235 | ||
| 233 | if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) { |
236 | if (!(flags & __PRINTF_FLAG_LEFTALIGNED)) { |
| 234 | while (width-- > 0) { |
237 | while (width-- > 0) { |
| 235 | putchar(' '); |
238 | putchar(' '); |
| 236 | written++; |
239 | written++; |
| 237 | } |
240 | } |
| 238 | } |
241 | } |
| 239 | 242 | ||
| 240 | /* print sign */ |
243 | /* print sign */ |
| 241 | if (sgn) { |
244 | if (sgn) { |
| 242 | putchar(sgn); |
245 | putchar(sgn); |
| 243 | written++; |
246 | written++; |
| 244 | } |
247 | } |
| 245 | 248 | ||
| 246 | /* print prefix */ |
249 | /* print prefix */ |
| 247 | 250 | ||
| 248 | if (flags & __PRINTF_FLAG_PREFIX) { |
251 | if (flags & __PRINTF_FLAG_PREFIX) { |
| 249 | switch(base) { |
252 | switch(base) { |
| 250 | case 2: /* Binary formating is not standard, but usefull */ |
253 | case 2: /* Binary formating is not standard, but usefull */ |
| 251 | putchar('0'); |
254 | putchar('0'); |
| 252 | if (flags & __PRINTF_FLAG_BIGCHARS) { |
255 | if (flags & __PRINTF_FLAG_BIGCHARS) { |
| 253 | putchar('B'); |
256 | putchar('B'); |
| 254 | } else { |
257 | } else { |
| 255 | putchar('b'); |
258 | putchar('b'); |
| 256 | } |
259 | } |
| 257 | written += 2; |
260 | written += 2; |
| 258 | break; |
261 | break; |
| 259 | case 8: |
262 | case 8: |
| 260 | putchar('o'); |
263 | putchar('o'); |
| 261 | written++; |
264 | written++; |
| 262 | break; |
265 | break; |
| 263 | case 16: |
266 | case 16: |
| 264 | putchar('0'); |
267 | putchar('0'); |
| 265 | if (flags & __PRINTF_FLAG_BIGCHARS) { |
268 | if (flags & __PRINTF_FLAG_BIGCHARS) { |
| 266 | putchar('X'); |
269 | putchar('X'); |
| 267 | } else { |
270 | } else { |
| 268 | putchar('x'); |
271 | putchar('x'); |
| 269 | } |
272 | } |
| 270 | written += 2; |
273 | written += 2; |
| 271 | break; |
274 | break; |
| 272 | } |
275 | } |
| 273 | } |
276 | } |
| 274 | 277 | ||
| 275 | /* print leading zeroes */ |
278 | /* print leading zeroes */ |
| 276 | precision -= size; |
279 | precision -= number_size; |
| 277 | while (precision-- > 0) { |
280 | while (precision-- > 0) { |
| 278 | putchar('0'); |
281 | putchar('0'); |
| 279 | written++; |
282 | written++; |
| 280 | } |
283 | } |
| 281 | 284 | ||
| 282 | 285 | ||
| 283 | /* print number itself */ |
286 | /* print number itself */ |
| 284 | 287 | ||
| 285 | written += putstr(++ptr); |
288 | written += putstr(++ptr); |
| 286 | 289 | ||
| 287 | /* print ending spaces */ |
290 | /* print ending spaces */ |
| 288 | 291 | ||
| 289 | while (width-- > 0) { |
292 | while (width-- > 0) { |
| 290 | putchar(' '); |
293 | putchar(' '); |
| 291 | written++; |
294 | written++; |
| 292 | } |
295 | } |
| 293 | 296 | ||
| 294 | return written; |
297 | return written; |
| 295 | } |
298 | } |
| 296 | 299 | ||
| 297 | 300 | ||
| 298 | /** General formatted text print |
301 | /** General formatted text print |
| 299 | * |
302 | * |
| 300 | * Print string formatted according the fmt parameter |
303 | * Print string formatted according the fmt parameter |
| 301 | * and variant arguments. Each formatting directive |
304 | * and variant arguments. Each formatting directive |
| 302 | * must have the following form: |
305 | * must have the following form: |
| 303 | * % [ flags ] [ width ] [ .precision ] [ type ] conversion |
306 | * % [ flags ] [ width ] [ .precision ] [ type ] conversion |
| 304 | * |
307 | * |
| 305 | * FLAGS: |
308 | * FLAGS: |
| 306 | * # Force to print prefix. For conversion %o is prefix 0, for %x and %X are prefixes 0x and 0X and for conversion %b is prefix 0b. |
309 | * # Force to print prefix. For conversion %o is prefix 0, for %x and %X are prefixes 0x and 0X and for conversion %b is prefix 0b. |
| 307 | * - Align to left. |
310 | * - Align to left. |
| 308 | * + Print positive sign just as negative. |
311 | * + Print positive sign just as negative. |
| 309 | * (space) If printed number is positive and '+' flag is not set, print space in place of sign. |
312 | * (space) If printed number is positive and '+' flag is not set, print space in place of sign. |
| 310 | * 0 Print 0 as padding instead of spaces. Zeroes are placed between sign and the rest of number. This flag is ignored if '-' flag is specified. |
313 | * 0 Print 0 as padding instead of spaces. Zeroes are placed between sign and the rest of number. This flag is ignored if '-' flag is specified. |
| 311 | * |
314 | * |
| 312 | * WIDTH: |
315 | * WIDTH: |
| 313 | * Specify minimal width of printed argument. If it is bigger, width is ignored. |
316 | * Specify minimal width of printed argument. If it is bigger, width is ignored. |
| 314 | * If width is specified with a '*' character instead of number, width is taken from parameter list. |
317 | * If width is specified with a '*' character instead of number, width is taken from parameter list. |
| 315 | * Int parameter expected before parameter for processed conversion specification. |
318 | * Int parameter expected before parameter for processed conversion specification. |
| 316 | * If this value is negative it is taken its absolute value and the '-' flag is set. |
319 | * If this value is negative it is taken its absolute value and the '-' flag is set. |
| 317 | * |
320 | * |
| 318 | * PRECISION: |
321 | * PRECISION: |
| 319 | * Value precision. For numbers it specifies minimum valid numbers. |
322 | * Value precision. For numbers it specifies minimum valid numbers. |
| 320 | * Smaller numbers are printed with leading zeroes. Bigger numbers are not affected. |
323 | * Smaller numbers are printed with leading zeroes. Bigger numbers are not affected. |
| 321 | * Strings with more than precision characters are cutted of. |
324 | * Strings with more than precision characters are cutted of. |
| 322 | * Just as width could be '*' used instead a number. |
325 | * Just as width could be '*' used instead a number. |
| 323 | * A int value is then expected in parameters. When both width and precision are specified using '*', |
326 | * A int value is then expected in parameters. When both width and precision are specified using '*', |
| 324 | * first parameter is used for width and second one for precision. |
327 | * first parameter is used for width and second one for precision. |
| 325 | * |
328 | * |
| 326 | * TYPE: |
329 | * TYPE: |
| 327 | * hh signed or unsigned char |
330 | * hh signed or unsigned char |
| 328 | * h signed or usigned short |
331 | * h signed or usigned short |
| 329 | * signed or usigned int (default value) |
332 | * signed or usigned int (default value) |
| 330 | * l signed or usigned long int |
333 | * l signed or usigned long int |
| 331 | * ll signed or usigned long long int |
334 | * ll signed or usigned long long int |
| 332 | * z size_t type |
335 | * z size_t type |
| 333 | * |
336 | * |
| 334 | * |
337 | * |
| 335 | * CONVERSIONS: |
338 | * CONVERSIONS: |
| 336 | * |
339 | * |
| 337 | * % Print percentage character. |
340 | * % Print percentage character. |
| 338 | * |
341 | * |
| 339 | * c Print single character. |
342 | * c Print single character. |
| 340 | * |
343 | * |
| 341 | * s Print zero terminated string. If a NULL value is passed as value, "(NULL)" is printed instead. |
344 | * s Print zero terminated string. If a NULL value is passed as value, "(NULL)" is printed instead. |
| 342 | * |
345 | * |
| 343 | * P, p Print value of a pointer. Void * value is expected and it is printed in hexadecimal notation with prefix |
346 | * P, p Print value of a pointer. Void * value is expected and it is printed in hexadecimal notation with prefix |
| 344 | * ( as with %#X or %#x for 32bit or %#X / %#x for 64bit long pointers) |
347 | * ( as with %#X or %#x for 32bit or %#X / %#x for 64bit long pointers) |
| 345 | * |
348 | * |
| 346 | * b Print value as unsigned binary number. Prefix is not printed by default. (Nonstandard extension.) |
349 | * b Print value as unsigned binary number. Prefix is not printed by default. (Nonstandard extension.) |
| 347 | * |
350 | * |
| 348 | * o Print value as unsigned octal number. Prefix is not printed by default. |
351 | * o Print value as unsigned octal number. Prefix is not printed by default. |
| 349 | * |
352 | * |
| 350 | * d,i Print signed decimal number. There is no difference between d and i conversion. |
353 | * d,i Print signed decimal number. There is no difference between d and i conversion. |
| 351 | * |
354 | * |
| 352 | * u Print unsigned decimal number. |
355 | * u Print unsigned decimal number. |
| 353 | * |
356 | * |
| 354 | * X, x Print hexadecimal number with upper- or lower-case. Prefix is not printed by default. |
357 | * X, x Print hexadecimal number with upper- or lower-case. Prefix is not printed by default. |
| 355 | * |
358 | * |
| 356 | * All other characters from fmt except the formatting directives |
359 | * All other characters from fmt except the formatting directives |
| 357 | * are printed in verbatim. |
360 | * are printed in verbatim. |
| 358 | * |
361 | * |
| 359 | * @param fmt Formatting NULL terminated string. |
362 | * @param fmt Formatting NULL terminated string. |
| 360 | * @return count of printed characters or negative value on fail. |
363 | * @return count of printed characters or negative value on fail. |
| 361 | */ |
364 | */ |
| 362 | int printf(const char *fmt, ...) |
365 | int printf(const char *fmt, ...) |
| 363 | { |
366 | { |
| 364 | int i = 0, j = 0; /* i is index of currently processed char from fmt, j is index to the first not printed nonformating character */ |
367 | int i = 0, j = 0; /* i is index of currently processed char from fmt, j is index to the first not printed nonformating character */ |
| 365 | int end; |
368 | int end; |
| 366 | int counter; /* counter of printed characters */ |
369 | int counter; /* counter of printed characters */ |
| 367 | int retval; /* used to store return values from called functions */ |
370 | int retval; /* used to store return values from called functions */ |
| 368 | va_list ap; |
371 | va_list ap; |
| 369 | char c; |
372 | char c; |
| 370 | qualifier_t qualifier; /* type of argument */ |
373 | qualifier_t qualifier; /* type of argument */ |
| 371 | int base; /* base in which will be parameter (numbers only) printed */ |
374 | int base; /* base in which will be parameter (numbers only) printed */ |
| 372 | uint64_t number; /* argument value */ |
375 | uint64_t number; /* argument value */ |
| 373 | size_t size; /* byte size of integer parameter */ |
376 | size_t size; /* byte size of integer parameter */ |
| 374 | int width, precision; |
377 | int width, precision; |
| 375 | uint64_t flags; |
378 | uint64_t flags; |
| 376 | 379 | ||
| 377 | counter = 0; |
380 | counter = 0; |
| 378 | va_start(ap, fmt); |
381 | va_start(ap, fmt); |
| 379 | 382 | ||
| 380 | while ((c = fmt[i])) { |
383 | while ((c = fmt[i])) { |
| 381 | /* control character */ |
384 | /* control character */ |
| 382 | if (c == '%' ) { |
385 | if (c == '%' ) { |
| 383 | /* print common characters if any processed */ |
386 | /* print common characters if any processed */ |
| 384 | if (i > j) { |
387 | if (i > j) { |
| 385 | if ((retval = putnchars(&fmt[j], (size_t)(i - j))) == EOF) { /* error */ |
388 | if ((retval = putnchars(&fmt[j], (size_t)(i - j))) == EOF) { /* error */ |
| 386 | return -counter; |
389 | return -counter; |
| 387 | } |
390 | } |
| 388 | counter += retval; |
391 | counter += retval; |
| 389 | } |
392 | } |
| 390 | 393 | ||
| 391 | j = i; |
394 | j = i; |
| 392 | /* parse modifiers */ |
395 | /* parse modifiers */ |
| 393 | flags = 0; |
396 | flags = 0; |
| 394 | end = 0; |
397 | end = 0; |
| 395 | 398 | ||
| 396 | do { |
399 | do { |
| 397 | ++i; |
400 | ++i; |
| 398 | switch (c = fmt[i]) { |
401 | switch (c = fmt[i]) { |
| 399 | case '#': flags |= __PRINTF_FLAG_PREFIX; break; |
402 | case '#': flags |= __PRINTF_FLAG_PREFIX; break; |
| 400 | case '-': flags |= __PRINTF_FLAG_LEFTALIGNED; break; |
403 | case '-': flags |= __PRINTF_FLAG_LEFTALIGNED; break; |
| 401 | case '+': flags |= __PRINTF_FLAG_SHOWPLUS; break; |
404 | case '+': flags |= __PRINTF_FLAG_SHOWPLUS; break; |
| 402 | case ' ': flags |= __PRINTF_FLAG_SPACESIGN; break; |
405 | case ' ': flags |= __PRINTF_FLAG_SPACESIGN; break; |
| 403 | case '0': flags |= __PRINTF_FLAG_ZEROPADDED; break; |
406 | case '0': flags |= __PRINTF_FLAG_ZEROPADDED; break; |
| 404 | default: end = 1; |
407 | default: end = 1; |
| 405 | }; |
408 | }; |
| 406 | 409 | ||
| 407 | } while (end == 0); |
410 | } while (end == 0); |
| 408 | 411 | ||
| 409 | /* width & '*' operator */ |
412 | /* width & '*' operator */ |
| 410 | width = 0; |
413 | width = 0; |
| 411 | if (isdigit(fmt[i])) { |
414 | if (isdigit(fmt[i])) { |
| 412 | while (isdigit(fmt[i])) { |
415 | while (isdigit(fmt[i])) { |
| 413 | width *= 10; |
416 | width *= 10; |
| 414 | width += fmt[i++] - '0'; |
417 | width += fmt[i++] - '0'; |
| 415 | } |
418 | } |
| 416 | } else if (fmt[i] == '*') { |
419 | } else if (fmt[i] == '*') { |
| 417 | /* get width value from argument list*/ |
420 | /* get width value from argument list*/ |
| 418 | i++; |
421 | i++; |
| 419 | width = (int)va_arg(ap, int); |
422 | width = (int)va_arg(ap, int); |
| 420 | if (width < 0) { |
423 | if (width < 0) { |
| 421 | /* negative width means to set '-' flag */ |
424 | /* negative width means to set '-' flag */ |
| 422 | width *= -1; |
425 | width *= -1; |
| 423 | flags |= __PRINTF_FLAG_LEFTALIGNED; |
426 | flags |= __PRINTF_FLAG_LEFTALIGNED; |
| 424 | } |
427 | } |
| 425 | } |
428 | } |
| 426 | 429 | ||
| 427 | /* precision and '*' operator */ |
430 | /* precision and '*' operator */ |
| 428 | precision = 0; |
431 | precision = 0; |
| 429 | if (fmt[i] == '.') { |
432 | if (fmt[i] == '.') { |
| 430 | ++i; |
433 | ++i; |
| 431 | if (isdigit(fmt[i])) { |
434 | if (isdigit(fmt[i])) { |
| 432 | while (isdigit(fmt[i])) { |
435 | while (isdigit(fmt[i])) { |
| 433 | precision *= 10; |
436 | precision *= 10; |
| 434 | precision += fmt[i++] - '0'; |
437 | precision += fmt[i++] - '0'; |
| 435 | } |
438 | } |
| 436 | } else if (fmt[i] == '*') { |
439 | } else if (fmt[i] == '*') { |
| 437 | /* get precision value from argument list*/ |
440 | /* get precision value from argument list*/ |
| 438 | i++; |
441 | i++; |
| 439 | precision = (int)va_arg(ap, int); |
442 | precision = (int)va_arg(ap, int); |
| 440 | if (precision < 0) { |
443 | if (precision < 0) { |
| 441 | /* negative precision means to ignore it */ |
444 | /* negative precision means to ignore it */ |
| 442 | precision = 0; |
445 | precision = 0; |
| 443 | } |
446 | } |
| 444 | } |
447 | } |
| 445 | } |
448 | } |
| 446 | 449 | ||
| 447 | switch (fmt[i++]) { |
450 | switch (fmt[i++]) { |
| 448 | /** TODO: unimplemented qualifiers: |
451 | /** TODO: unimplemented qualifiers: |
| 449 | * t ptrdiff_t - ISO C 99 |
452 | * t ptrdiff_t - ISO C 99 |
| 450 | */ |
453 | */ |
| 451 | case 'h': /* char or short */ |
454 | case 'h': /* char or short */ |
| 452 | qualifier = PrintfQualifierShort; |
455 | qualifier = PrintfQualifierShort; |
| 453 | if (fmt[i] == 'h') { |
456 | if (fmt[i] == 'h') { |
| 454 | i++; |
457 | i++; |
| 455 | qualifier = PrintfQualifierByte; |
458 | qualifier = PrintfQualifierByte; |
| 456 | } |
459 | } |
| 457 | break; |
460 | break; |
| 458 | case 'l': /* long or long long*/ |
461 | case 'l': /* long or long long*/ |
| 459 | qualifier = PrintfQualifierLong; |
462 | qualifier = PrintfQualifierLong; |
| 460 | if (fmt[i] == 'l') { |
463 | if (fmt[i] == 'l') { |
| 461 | i++; |
464 | i++; |
| 462 | qualifier = PrintfQualifierLongLong; |
465 | qualifier = PrintfQualifierLongLong; |
| 463 | } |
466 | } |
| 464 | break; |
467 | break; |
| 465 | case 'z': /* size_t */ |
468 | case 'z': /* size_t */ |
| 466 | qualifier = PrintfQualifierSizeT; |
469 | qualifier = PrintfQualifierSizeT; |
| 467 | break; |
470 | break; |
| 468 | default: |
471 | default: |
| 469 | qualifier = PrintfQualifierInt; /* default type */ |
472 | qualifier = PrintfQualifierInt; /* default type */ |
| 470 | --i; |
473 | --i; |
| 471 | } |
474 | } |
| 472 | 475 | ||
| 473 | base = 10; |
476 | base = 10; |
| 474 | 477 | ||
| 475 | switch (c = fmt[i]) { |
478 | switch (c = fmt[i]) { |
| 476 | 479 | ||
| 477 | /* |
480 | /* |
| 478 | * String and character conversions. |
481 | * String and character conversions. |
| 479 | */ |
482 | */ |
| 480 | case 's': |
483 | case 's': |
| 481 | if ((retval = print_string(va_arg(ap, char*), width, precision, flags)) == EOF) { |
484 | if ((retval = print_string(va_arg(ap, char*), width, precision, flags)) == EOF) { |
| 482 | return -counter; |
485 | return -counter; |
| 483 | }; |
486 | }; |
| 484 | 487 | ||
| 485 | counter += retval; |
488 | counter += retval; |
| 486 | j = i + 1; |
489 | j = i + 1; |
| 487 | goto next_char; |
490 | goto next_char; |
| 488 | case 'c': |
491 | case 'c': |
| 489 | c = va_arg(ap, unsigned int); |
492 | c = va_arg(ap, unsigned int); |
| 490 | if ((retval = print_char(c, width, flags )) == EOF) { |
493 | if ((retval = print_char(c, width, flags )) == EOF) { |
| 491 | return -counter; |
494 | return -counter; |
| 492 | }; |
495 | }; |
| 493 | 496 | ||
| 494 | counter += retval; |
497 | counter += retval; |
| 495 | j = i + 1; |
498 | j = i + 1; |
| 496 | goto next_char; |
499 | goto next_char; |
| 497 | 500 | ||
| 498 | /* |
501 | /* |
| 499 | * Integer values |
502 | * Integer values |
| 500 | */ |
503 | */ |
| 501 | case 'P': /* pointer */ |
504 | case 'P': /* pointer */ |
| 502 | flags |= __PRINTF_FLAG_BIGCHARS; |
505 | flags |= __PRINTF_FLAG_BIGCHARS; |
| 503 | case 'p': |
506 | case 'p': |
| 504 | flags |= __PRINTF_FLAG_PREFIX; |
507 | flags |= __PRINTF_FLAG_PREFIX; |
| 505 | base = 16; |
508 | base = 16; |
| 506 | qualifier = PrintfQualifierPointer; |
509 | qualifier = PrintfQualifierPointer; |
| 507 | break; |
510 | break; |
| 508 | case 'b': |
511 | case 'b': |
| 509 | base = 2; |
512 | base = 2; |
| 510 | break; |
513 | break; |
| 511 | case 'o': |
514 | case 'o': |
| 512 | base = 8; |
515 | base = 8; |
| 513 | break; |
516 | break; |
| 514 | case 'd': |
517 | case 'd': |
| 515 | case 'i': |
518 | case 'i': |
| 516 | flags |= __PRINTF_FLAG_SIGNED; |
519 | flags |= __PRINTF_FLAG_SIGNED; |
| 517 | case 'u': |
520 | case 'u': |
| 518 | break; |
521 | break; |
| 519 | case 'X': |
522 | case 'X': |
| 520 | flags |= __PRINTF_FLAG_BIGCHARS; |
523 | flags |= __PRINTF_FLAG_BIGCHARS; |
| 521 | case 'x': |
524 | case 'x': |
| 522 | base = 16; |
525 | base = 16; |
| 523 | break; |
526 | break; |
| 524 | /* percentile itself */ |
527 | /* percentile itself */ |
| 525 | case '%': |
528 | case '%': |
| 526 | j = i; |
529 | j = i; |
| 527 | goto next_char; |
530 | goto next_char; |
| 528 | /* |
531 | /* |
| 529 | * Bad formatting. |
532 | * Bad formatting. |
| 530 | */ |
533 | */ |
| 531 | default: |
534 | default: |
| 532 | /* Unknown format |
535 | /* Unknown format |
| 533 | * now, the j is index of '%' so we will |
536 | * now, the j is index of '%' so we will |
| 534 | * print whole bad format sequence |
537 | * print whole bad format sequence |
| 535 | */ |
538 | */ |
| 536 | goto next_char; |
539 | goto next_char; |
| 537 | } |
540 | } |
| 538 | 541 | ||
| 539 | 542 | ||
| 540 | /* Print integers */ |
543 | /* Print integers */ |
| 541 | /* print number */ |
544 | /* print number */ |
| 542 | switch (qualifier) { |
545 | switch (qualifier) { |
| 543 | case PrintfQualifierByte: |
546 | case PrintfQualifierByte: |
| 544 | size = sizeof(unsigned char); |
547 | size = sizeof(unsigned char); |
| 545 | number = (uint64_t)va_arg(ap, unsigned int); |
548 | number = (uint64_t)va_arg(ap, unsigned int); |
| 546 | break; |
549 | break; |
| 547 | case PrintfQualifierShort: |
550 | case PrintfQualifierShort: |
| 548 | size = sizeof(unsigned short); |
551 | size = sizeof(unsigned short); |
| 549 | number = (uint64_t)va_arg(ap, unsigned int); |
552 | number = (uint64_t)va_arg(ap, unsigned int); |
| 550 | break; |
553 | break; |
| 551 | case PrintfQualifierInt: |
554 | case PrintfQualifierInt: |
| 552 | size = sizeof(unsigned int); |
555 | size = sizeof(unsigned int); |
| 553 | number = (uint64_t)va_arg(ap, unsigned int); |
556 | number = (uint64_t)va_arg(ap, unsigned int); |
| 554 | break; |
557 | break; |
| 555 | case PrintfQualifierLong: |
558 | case PrintfQualifierLong: |
| 556 | size = sizeof(unsigned long); |
559 | size = sizeof(unsigned long); |
| 557 | number = (uint64_t)va_arg(ap, unsigned long); |
560 | number = (uint64_t)va_arg(ap, unsigned long); |
| 558 | break; |
561 | break; |
| 559 | case PrintfQualifierLongLong: |
562 | case PrintfQualifierLongLong: |
| 560 | size = sizeof(unsigned long long); |
563 | size = sizeof(unsigned long long); |
| 561 | number = (uint64_t)va_arg(ap, unsigned long long); |
564 | number = (uint64_t)va_arg(ap, unsigned long long); |
| 562 | break; |
565 | break; |
| 563 | case PrintfQualifierPointer: |
566 | case PrintfQualifierPointer: |
| 564 | size = sizeof(void *); |
567 | size = sizeof(void *); |
| 565 | number = (uint64_t)(unsigned long)va_arg(ap, void *); |
568 | number = (uint64_t)(unsigned long)va_arg(ap, void *); |
| 566 | break; |
569 | break; |
| 567 | case PrintfQualifierSizeT: |
570 | case PrintfQualifierSizeT: |
| 568 | size = sizeof(size_t); |
571 | size = sizeof(size_t); |
| 569 | number = (uint64_t)va_arg(ap, size_t); |
572 | number = (uint64_t)va_arg(ap, size_t); |
| 570 | break; |
573 | break; |
| 571 | default: /* Unknown qualifier */ |
574 | default: /* Unknown qualifier */ |
| 572 | return -counter; |
575 | return -counter; |
| 573 | 576 | ||
| 574 | } |
577 | } |
| 575 | 578 | ||
| 576 | if (flags & __PRINTF_FLAG_SIGNED) { |
579 | if (flags & __PRINTF_FLAG_SIGNED) { |
| 577 | if (number & (0x1 << (size*8 - 1))) { |
580 | if (number & (0x1 << (size*8 - 1))) { |
| 578 | flags |= __PRINTF_FLAG_NEGATIVE; |
581 | flags |= __PRINTF_FLAG_NEGATIVE; |
| 579 | 582 | ||
| 580 | if (size == sizeof(uint64_t)) { |
583 | if (size == sizeof(uint64_t)) { |
| 581 | number = -((int64_t)number); |
584 | number = -((int64_t)number); |
| 582 | } else { |
585 | } else { |
| 583 | number = ~number; |
586 | number = ~number; |
| 584 | number &= (~((0xFFFFFFFFFFFFFFFFll) << (size * 8))); |
587 | number &= (~((0xFFFFFFFFFFFFFFFFll) << (size * 8))); |
| 585 | number++; |
588 | number++; |
| 586 | } |
589 | } |
| 587 | } |
590 | } |
| 588 | } |
591 | } |
| 589 | 592 | ||
| 590 | if ((retval = print_number(number, width, precision, base, flags)) == EOF ) { |
593 | if ((retval = print_number(number, width, precision, base, flags)) == EOF ) { |
| 591 | return -counter; |
594 | return -counter; |
| 592 | }; |
595 | }; |
| 593 | 596 | ||
| 594 | counter += retval; |
597 | counter += retval; |
| 595 | j = i + 1; |
598 | j = i + 1; |
| 596 | } |
599 | } |
| 597 | next_char: |
600 | next_char: |
| 598 | 601 | ||
| 599 | ++i; |
602 | ++i; |
| 600 | } |
603 | } |
| 601 | 604 | ||
| 602 | if (i > j) { |
605 | if (i > j) { |
| 603 | if ((retval = putnchars(&fmt[j], (size_t)(i - j))) == EOF) { /* error */ |
606 | if ((retval = putnchars(&fmt[j], (size_t)(i - j))) == EOF) { /* error */ |
| 604 | return -counter; |
607 | return -counter; |
| 605 | } |
608 | } |
| 606 | counter += retval; |
609 | counter += retval; |
| 607 | } |
610 | } |
| 608 | 611 | ||
| 609 | va_end(ap); |
612 | va_end(ap); |
| 610 | return counter; |
613 | return counter; |
| 611 | } |
614 | } |
| 612 | 615 | ||
| 613 | 616 | ||