Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/lib/vsprintf.c |
| 3 | * |
| 4 | * Copyright (C) 1991, 1992 Linus Torvalds |
| 5 | */ |
| 6 | |
| 7 | /* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */ |
| 8 | /* |
| 9 | * Wirzenius wrote this portably, Torvalds fucked it up :-) |
| 10 | */ |
| 11 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 12 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * Fri Jul 13 2001 Crutcher Dunnavant <crutcher+kernel@datastacks.com> |
| 14 | * - changed to provide snprintf and vsnprintf functions |
| 15 | * So Feb 1 16:51:32 CET 2004 Juergen Quade <quade@hsnr.de> |
| 16 | * - scnprintf and vscnprintf |
| 17 | */ |
| 18 | |
| 19 | #include <stdarg.h> |
| 20 | #include <linux/module.h> |
| 21 | #include <linux/types.h> |
| 22 | #include <linux/string.h> |
| 23 | #include <linux/ctype.h> |
| 24 | #include <linux/kernel.h> |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 25 | #include <linux/kallsyms.h> |
| 26 | #include <linux/uaccess.h> |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 27 | #include <linux/ioport.h> |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 28 | #include <net/addrconf.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
Tim Schmielau | 4e57b68 | 2005-10-30 15:03:48 -0800 | [diff] [blame] | 30 | #include <asm/page.h> /* for PAGE_SIZE */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <asm/div64.h> |
James Bottomley | deac93d | 2008-09-03 20:43:36 -0500 | [diff] [blame] | 32 | #include <asm/sections.h> /* for dereference_function_descriptor() */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
Denys Vlasenko | 9b706ae | 2008-02-09 23:24:09 +0100 | [diff] [blame] | 34 | /* Works only for digits and letters, but small and fast */ |
| 35 | #define TOLOWER(x) ((x) | 0x20) |
| 36 | |
Harvey Harrison | aa46a63 | 2008-10-16 13:40:34 -0700 | [diff] [blame] | 37 | static unsigned int simple_guess_base(const char *cp) |
| 38 | { |
| 39 | if (cp[0] == '0') { |
| 40 | if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2])) |
| 41 | return 16; |
| 42 | else |
| 43 | return 8; |
| 44 | } else { |
| 45 | return 10; |
| 46 | } |
| 47 | } |
| 48 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | * simple_strtoull - convert a string to an unsigned long long |
| 51 | * @cp: The start of the string |
| 52 | * @endp: A pointer to the end of the parsed string will be placed here |
| 53 | * @base: The number base to use |
| 54 | */ |
Harvey Harrison | 22d2705 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 55 | unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | { |
Harvey Harrison | aa46a63 | 2008-10-16 13:40:34 -0700 | [diff] [blame] | 57 | unsigned long long result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 58 | |
Harvey Harrison | aa46a63 | 2008-10-16 13:40:34 -0700 | [diff] [blame] | 59 | if (!base) |
| 60 | base = simple_guess_base(cp); |
| 61 | |
| 62 | if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x') |
| 63 | cp += 2; |
| 64 | |
| 65 | while (isxdigit(*cp)) { |
| 66 | unsigned int value; |
| 67 | |
| 68 | value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10; |
| 69 | if (value >= base) |
| 70 | break; |
| 71 | result = result * base + value; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | cp++; |
| 73 | } |
| 74 | if (endp) |
| 75 | *endp = (char *)cp; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 76 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | return result; |
| 78 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 79 | EXPORT_SYMBOL(simple_strtoull); |
| 80 | |
| 81 | /** |
André Goddard Rosa | 922ac25 | 2009-12-14 18:01:01 -0800 | [diff] [blame] | 82 | * simple_strtoul - convert a string to an unsigned long |
| 83 | * @cp: The start of the string |
| 84 | * @endp: A pointer to the end of the parsed string will be placed here |
| 85 | * @base: The number base to use |
| 86 | */ |
| 87 | unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base) |
| 88 | { |
| 89 | return simple_strtoull(cp, endp, base); |
| 90 | } |
| 91 | EXPORT_SYMBOL(simple_strtoul); |
| 92 | |
| 93 | /** |
| 94 | * simple_strtol - convert a string to a signed long |
| 95 | * @cp: The start of the string |
| 96 | * @endp: A pointer to the end of the parsed string will be placed here |
| 97 | * @base: The number base to use |
| 98 | */ |
| 99 | long simple_strtol(const char *cp, char **endp, unsigned int base) |
| 100 | { |
| 101 | if (*cp == '-') |
| 102 | return -simple_strtoul(cp + 1, endp, base); |
| 103 | |
| 104 | return simple_strtoul(cp, endp, base); |
| 105 | } |
| 106 | EXPORT_SYMBOL(simple_strtol); |
| 107 | |
| 108 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | * simple_strtoll - convert a string to a signed long long |
| 110 | * @cp: The start of the string |
| 111 | * @endp: A pointer to the end of the parsed string will be placed here |
| 112 | * @base: The number base to use |
| 113 | */ |
Harvey Harrison | 22d2705 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 114 | long long simple_strtoll(const char *cp, char **endp, unsigned int base) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 116 | if (*cp == '-') |
Harvey Harrison | 22d2705 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 117 | return -simple_strtoull(cp + 1, endp, base); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 118 | |
Harvey Harrison | 22d2705 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 119 | return simple_strtoull(cp, endp, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | } |
| 121 | |
Yi Yang | 06b2a76 | 2008-02-08 04:21:57 -0800 | [diff] [blame] | 122 | /** |
| 123 | * strict_strtoul - convert a string to an unsigned long strictly |
| 124 | * @cp: The string to be converted |
| 125 | * @base: The number base to use |
| 126 | * @res: The converted result value |
| 127 | * |
| 128 | * strict_strtoul converts a string to an unsigned long only if the |
| 129 | * string is really an unsigned long string, any string containing |
| 130 | * any invalid char at the tail will be rejected and -EINVAL is returned, |
| 131 | * only a newline char at the tail is acceptible because people generally |
| 132 | * change a module parameter in the following way: |
| 133 | * |
| 134 | * echo 1024 > /sys/module/e1000/parameters/copybreak |
| 135 | * |
| 136 | * echo will append a newline to the tail. |
| 137 | * |
| 138 | * It returns 0 if conversion is successful and *res is set to the converted |
| 139 | * value, otherwise it returns -EINVAL and *res is set to 0. |
| 140 | * |
| 141 | * simple_strtoul just ignores the successive invalid characters and |
| 142 | * return the converted value of prefix part of the string. |
| 143 | */ |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 144 | int strict_strtoul(const char *cp, unsigned int base, unsigned long *res) |
| 145 | { |
| 146 | char *tail; |
| 147 | unsigned long val; |
| 148 | size_t len; |
| 149 | |
| 150 | *res = 0; |
| 151 | len = strlen(cp); |
| 152 | if (len == 0) |
| 153 | return -EINVAL; |
| 154 | |
| 155 | val = simple_strtoul(cp, &tail, base); |
Pavel Machek | e899aa8 | 2009-01-06 14:40:53 -0800 | [diff] [blame] | 156 | if (tail == cp) |
| 157 | return -EINVAL; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 158 | |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 159 | if ((*tail == '\0') || |
| 160 | ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) { |
| 161 | *res = val; |
| 162 | return 0; |
| 163 | } |
| 164 | |
| 165 | return -EINVAL; |
| 166 | } |
| 167 | EXPORT_SYMBOL(strict_strtoul); |
Yi Yang | 06b2a76 | 2008-02-08 04:21:57 -0800 | [diff] [blame] | 168 | |
| 169 | /** |
| 170 | * strict_strtol - convert a string to a long strictly |
| 171 | * @cp: The string to be converted |
| 172 | * @base: The number base to use |
| 173 | * @res: The converted result value |
| 174 | * |
| 175 | * strict_strtol is similiar to strict_strtoul, but it allows the first |
| 176 | * character of a string is '-'. |
| 177 | * |
| 178 | * It returns 0 if conversion is successful and *res is set to the converted |
| 179 | * value, otherwise it returns -EINVAL and *res is set to 0. |
| 180 | */ |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 181 | int strict_strtol(const char *cp, unsigned int base, long *res) |
| 182 | { |
| 183 | int ret; |
| 184 | if (*cp == '-') { |
| 185 | ret = strict_strtoul(cp + 1, base, (unsigned long *)res); |
| 186 | if (!ret) |
| 187 | *res = -(*res); |
| 188 | } else { |
| 189 | ret = strict_strtoul(cp, base, (unsigned long *)res); |
| 190 | } |
| 191 | |
| 192 | return ret; |
| 193 | } |
| 194 | EXPORT_SYMBOL(strict_strtol); |
Yi Yang | 06b2a76 | 2008-02-08 04:21:57 -0800 | [diff] [blame] | 195 | |
| 196 | /** |
| 197 | * strict_strtoull - convert a string to an unsigned long long strictly |
| 198 | * @cp: The string to be converted |
| 199 | * @base: The number base to use |
| 200 | * @res: The converted result value |
| 201 | * |
| 202 | * strict_strtoull converts a string to an unsigned long long only if the |
| 203 | * string is really an unsigned long long string, any string containing |
| 204 | * any invalid char at the tail will be rejected and -EINVAL is returned, |
| 205 | * only a newline char at the tail is acceptible because people generally |
| 206 | * change a module parameter in the following way: |
| 207 | * |
| 208 | * echo 1024 > /sys/module/e1000/parameters/copybreak |
| 209 | * |
| 210 | * echo will append a newline to the tail of the string. |
| 211 | * |
| 212 | * It returns 0 if conversion is successful and *res is set to the converted |
| 213 | * value, otherwise it returns -EINVAL and *res is set to 0. |
| 214 | * |
| 215 | * simple_strtoull just ignores the successive invalid characters and |
| 216 | * return the converted value of prefix part of the string. |
| 217 | */ |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 218 | int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res) |
| 219 | { |
| 220 | char *tail; |
| 221 | unsigned long long val; |
| 222 | size_t len; |
| 223 | |
| 224 | *res = 0; |
| 225 | len = strlen(cp); |
| 226 | if (len == 0) |
| 227 | return -EINVAL; |
| 228 | |
| 229 | val = simple_strtoull(cp, &tail, base); |
Pavel Machek | e899aa8 | 2009-01-06 14:40:53 -0800 | [diff] [blame] | 230 | if (tail == cp) |
| 231 | return -EINVAL; |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 232 | if ((*tail == '\0') || |
| 233 | ((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) { |
| 234 | *res = val; |
| 235 | return 0; |
| 236 | } |
| 237 | |
| 238 | return -EINVAL; |
| 239 | } |
| 240 | EXPORT_SYMBOL(strict_strtoull); |
Yi Yang | 06b2a76 | 2008-02-08 04:21:57 -0800 | [diff] [blame] | 241 | |
| 242 | /** |
| 243 | * strict_strtoll - convert a string to a long long strictly |
| 244 | * @cp: The string to be converted |
| 245 | * @base: The number base to use |
| 246 | * @res: The converted result value |
| 247 | * |
| 248 | * strict_strtoll is similiar to strict_strtoull, but it allows the first |
| 249 | * character of a string is '-'. |
| 250 | * |
| 251 | * It returns 0 if conversion is successful and *res is set to the converted |
| 252 | * value, otherwise it returns -EINVAL and *res is set to 0. |
| 253 | */ |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 254 | int strict_strtoll(const char *cp, unsigned int base, long long *res) |
| 255 | { |
| 256 | int ret; |
| 257 | if (*cp == '-') { |
| 258 | ret = strict_strtoull(cp + 1, base, (unsigned long long *)res); |
| 259 | if (!ret) |
| 260 | *res = -(*res); |
| 261 | } else { |
| 262 | ret = strict_strtoull(cp, base, (unsigned long long *)res); |
| 263 | } |
Yi Yang | 06b2a76 | 2008-02-08 04:21:57 -0800 | [diff] [blame] | 264 | |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 265 | return ret; |
| 266 | } |
Yi Yang | 06b2a76 | 2008-02-08 04:21:57 -0800 | [diff] [blame] | 267 | EXPORT_SYMBOL(strict_strtoll); |
Yi Yang | 06b2a76 | 2008-02-08 04:21:57 -0800 | [diff] [blame] | 268 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | static int skip_atoi(const char **s) |
| 270 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 271 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | |
| 273 | while (isdigit(**s)) |
| 274 | i = i*10 + *((*s)++) - '0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 275 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | return i; |
| 277 | } |
| 278 | |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 279 | /* Decimal conversion is by far the most typical, and is used |
| 280 | * for /proc and /sys data. This directly impacts e.g. top performance |
| 281 | * with many processes running. We optimize it for speed |
| 282 | * using code from |
| 283 | * http://www.cs.uiowa.edu/~jones/bcd/decimal.html |
| 284 | * (with permission from the author, Douglas W. Jones). */ |
| 285 | |
| 286 | /* Formats correctly any integer in [0,99999]. |
| 287 | * Outputs from one to five digits depending on input. |
| 288 | * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 289 | static char *put_dec_trunc(char *buf, unsigned q) |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 290 | { |
| 291 | unsigned d3, d2, d1, d0; |
| 292 | d1 = (q>>4) & 0xf; |
| 293 | d2 = (q>>8) & 0xf; |
| 294 | d3 = (q>>12); |
| 295 | |
| 296 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); |
| 297 | q = (d0 * 0xcd) >> 11; |
| 298 | d0 = d0 - 10*q; |
| 299 | *buf++ = d0 + '0'; /* least significant digit */ |
| 300 | d1 = q + 9*d3 + 5*d2 + d1; |
| 301 | if (d1 != 0) { |
| 302 | q = (d1 * 0xcd) >> 11; |
| 303 | d1 = d1 - 10*q; |
| 304 | *buf++ = d1 + '0'; /* next digit */ |
| 305 | |
| 306 | d2 = q + 2*d2; |
| 307 | if ((d2 != 0) || (d3 != 0)) { |
| 308 | q = (d2 * 0xd) >> 7; |
| 309 | d2 = d2 - 10*q; |
| 310 | *buf++ = d2 + '0'; /* next digit */ |
| 311 | |
| 312 | d3 = q + 4*d3; |
| 313 | if (d3 != 0) { |
| 314 | q = (d3 * 0xcd) >> 11; |
| 315 | d3 = d3 - 10*q; |
| 316 | *buf++ = d3 + '0'; /* next digit */ |
| 317 | if (q != 0) |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 318 | *buf++ = q + '0'; /* most sign. digit */ |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 319 | } |
| 320 | } |
| 321 | } |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 322 | |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 323 | return buf; |
| 324 | } |
| 325 | /* Same with if's removed. Always emits five digits */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 326 | static char *put_dec_full(char *buf, unsigned q) |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 327 | { |
| 328 | /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ |
| 329 | /* but anyway, gcc produces better code with full-sized ints */ |
| 330 | unsigned d3, d2, d1, d0; |
| 331 | d1 = (q>>4) & 0xf; |
| 332 | d2 = (q>>8) & 0xf; |
| 333 | d3 = (q>>12); |
| 334 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 335 | /* |
| 336 | * Possible ways to approx. divide by 10 |
| 337 | * gcc -O2 replaces multiply with shifts and adds |
| 338 | * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) |
| 339 | * (x * 0x67) >> 10: 1100111 |
| 340 | * (x * 0x34) >> 9: 110100 - same |
| 341 | * (x * 0x1a) >> 8: 11010 - same |
| 342 | * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) |
| 343 | */ |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 344 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); |
| 345 | q = (d0 * 0xcd) >> 11; |
| 346 | d0 = d0 - 10*q; |
| 347 | *buf++ = d0 + '0'; |
| 348 | d1 = q + 9*d3 + 5*d2 + d1; |
| 349 | q = (d1 * 0xcd) >> 11; |
| 350 | d1 = d1 - 10*q; |
| 351 | *buf++ = d1 + '0'; |
| 352 | |
| 353 | d2 = q + 2*d2; |
| 354 | q = (d2 * 0xd) >> 7; |
| 355 | d2 = d2 - 10*q; |
| 356 | *buf++ = d2 + '0'; |
| 357 | |
| 358 | d3 = q + 4*d3; |
| 359 | q = (d3 * 0xcd) >> 11; /* - shorter code */ |
| 360 | /* q = (d3 * 0x67) >> 10; - would also work */ |
| 361 | d3 = d3 - 10*q; |
| 362 | *buf++ = d3 + '0'; |
| 363 | *buf++ = q + '0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 364 | |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 365 | return buf; |
| 366 | } |
| 367 | /* No inlining helps gcc to use registers better */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 368 | static noinline char *put_dec(char *buf, unsigned long long num) |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 369 | { |
| 370 | while (1) { |
| 371 | unsigned rem; |
| 372 | if (num < 100000) |
| 373 | return put_dec_trunc(buf, num); |
| 374 | rem = do_div(num, 100000); |
| 375 | buf = put_dec_full(buf, rem); |
| 376 | } |
| 377 | } |
| 378 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | #define ZEROPAD 1 /* pad with zero */ |
| 380 | #define SIGN 2 /* unsigned/signed long */ |
| 381 | #define PLUS 4 /* show plus */ |
| 382 | #define SPACE 8 /* space if plus */ |
| 383 | #define LEFT 16 /* left justified */ |
Bjorn Helgaas | b89dc5d | 2010-03-05 10:47:31 -0700 | [diff] [blame] | 384 | #define SMALL 32 /* use lowercase in hex (must be 32 == 0x20) */ |
| 385 | #define SPECIAL 64 /* prefix hex with "0x", octal with "0" */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 387 | enum format_type { |
| 388 | FORMAT_TYPE_NONE, /* Just a string part */ |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 389 | FORMAT_TYPE_WIDTH, |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 390 | FORMAT_TYPE_PRECISION, |
| 391 | FORMAT_TYPE_CHAR, |
| 392 | FORMAT_TYPE_STR, |
| 393 | FORMAT_TYPE_PTR, |
| 394 | FORMAT_TYPE_PERCENT_CHAR, |
| 395 | FORMAT_TYPE_INVALID, |
| 396 | FORMAT_TYPE_LONG_LONG, |
| 397 | FORMAT_TYPE_ULONG, |
| 398 | FORMAT_TYPE_LONG, |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 399 | FORMAT_TYPE_UBYTE, |
| 400 | FORMAT_TYPE_BYTE, |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 401 | FORMAT_TYPE_USHORT, |
| 402 | FORMAT_TYPE_SHORT, |
| 403 | FORMAT_TYPE_UINT, |
| 404 | FORMAT_TYPE_INT, |
| 405 | FORMAT_TYPE_NRCHARS, |
| 406 | FORMAT_TYPE_SIZE_T, |
| 407 | FORMAT_TYPE_PTRDIFF |
| 408 | }; |
| 409 | |
| 410 | struct printf_spec { |
Joe Perches | ef0658f | 2010-03-06 17:10:14 -0800 | [diff] [blame] | 411 | u16 type; |
| 412 | s16 field_width; /* width of output field */ |
| 413 | u8 flags; /* flags to number() */ |
| 414 | u8 base; |
| 415 | s8 precision; /* # of digits/chars */ |
| 416 | u8 qualifier; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 417 | }; |
| 418 | |
| 419 | static char *number(char *buf, char *end, unsigned long long num, |
| 420 | struct printf_spec spec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | { |
Denys Vlasenko | 9b706ae | 2008-02-09 23:24:09 +0100 | [diff] [blame] | 422 | /* we are called with base 8, 10 or 16, only, thus don't need "G..." */ |
| 423 | static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */ |
| 424 | |
| 425 | char tmp[66]; |
| 426 | char sign; |
| 427 | char locase; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 428 | int need_pfx = ((spec.flags & SPECIAL) && spec.base != 10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | int i; |
| 430 | |
Denys Vlasenko | 9b706ae | 2008-02-09 23:24:09 +0100 | [diff] [blame] | 431 | /* locase = 0 or 0x20. ORing digits or letters with 'locase' |
| 432 | * produces same digits or (maybe lowercased) letters */ |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 433 | locase = (spec.flags & SMALL); |
| 434 | if (spec.flags & LEFT) |
| 435 | spec.flags &= ~ZEROPAD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | sign = 0; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 437 | if (spec.flags & SIGN) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 438 | if ((signed long long)num < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | sign = '-'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 440 | num = -(signed long long)num; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 441 | spec.field_width--; |
| 442 | } else if (spec.flags & PLUS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | sign = '+'; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 444 | spec.field_width--; |
| 445 | } else if (spec.flags & SPACE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | sign = ' '; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 447 | spec.field_width--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | } |
| 449 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 450 | if (need_pfx) { |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 451 | spec.field_width--; |
| 452 | if (spec.base == 16) |
| 453 | spec.field_width--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 455 | |
| 456 | /* generate full string in tmp[], in reverse order */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | i = 0; |
| 458 | if (num == 0) |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 459 | tmp[i++] = '0'; |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 460 | /* Generic code, for any base: |
| 461 | else do { |
Denys Vlasenko | 9b706ae | 2008-02-09 23:24:09 +0100 | [diff] [blame] | 462 | tmp[i++] = (digits[do_div(num,base)] | locase); |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 463 | } while (num != 0); |
| 464 | */ |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 465 | else if (spec.base != 10) { /* 8 or 16 */ |
| 466 | int mask = spec.base - 1; |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 467 | int shift = 3; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 468 | |
| 469 | if (spec.base == 16) |
| 470 | shift = 4; |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 471 | do { |
Denys Vlasenko | 9b706ae | 2008-02-09 23:24:09 +0100 | [diff] [blame] | 472 | tmp[i++] = (digits[((unsigned char)num) & mask] | locase); |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 473 | num >>= shift; |
| 474 | } while (num); |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 475 | } else { /* base 10 */ |
| 476 | i = put_dec(tmp, num) - tmp; |
| 477 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 478 | |
| 479 | /* printing 100 using %2d gives "100", not "00" */ |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 480 | if (i > spec.precision) |
| 481 | spec.precision = i; |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 482 | /* leading space padding */ |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 483 | spec.field_width -= spec.precision; |
| 484 | if (!(spec.flags & (ZEROPAD+LEFT))) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 485 | while (--spec.field_width >= 0) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 486 | if (buf < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | *buf = ' '; |
| 488 | ++buf; |
| 489 | } |
| 490 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 491 | /* sign */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | if (sign) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 493 | if (buf < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | *buf = sign; |
| 495 | ++buf; |
| 496 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 497 | /* "0x" / "0" prefix */ |
| 498 | if (need_pfx) { |
| 499 | if (buf < end) |
| 500 | *buf = '0'; |
| 501 | ++buf; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 502 | if (spec.base == 16) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 503 | if (buf < end) |
Denys Vlasenko | 9b706ae | 2008-02-09 23:24:09 +0100 | [diff] [blame] | 504 | *buf = ('X' | locase); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | ++buf; |
| 506 | } |
| 507 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 508 | /* zero or space padding */ |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 509 | if (!(spec.flags & LEFT)) { |
| 510 | char c = (spec.flags & ZEROPAD) ? '0' : ' '; |
| 511 | while (--spec.field_width >= 0) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 512 | if (buf < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | *buf = c; |
| 514 | ++buf; |
| 515 | } |
| 516 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 517 | /* hmm even more zero padding? */ |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 518 | while (i <= --spec.precision) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 519 | if (buf < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | *buf = '0'; |
| 521 | ++buf; |
| 522 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 523 | /* actual digits of result */ |
| 524 | while (--i >= 0) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 525 | if (buf < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | *buf = tmp[i]; |
| 527 | ++buf; |
| 528 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 529 | /* trailing space padding */ |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 530 | while (--spec.field_width >= 0) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 531 | if (buf < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | *buf = ' '; |
| 533 | ++buf; |
| 534 | } |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 535 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | return buf; |
| 537 | } |
| 538 | |
André Goddard Rosa | 0f4f81d | 2009-12-14 18:00:55 -0800 | [diff] [blame] | 539 | static char *string(char *buf, char *end, const char *s, struct printf_spec spec) |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 540 | { |
| 541 | int len, i; |
| 542 | |
| 543 | if ((unsigned long)s < PAGE_SIZE) |
André Goddard Rosa | 0f4f81d | 2009-12-14 18:00:55 -0800 | [diff] [blame] | 544 | s = "(null)"; |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 545 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 546 | len = strnlen(s, spec.precision); |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 547 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 548 | if (!(spec.flags & LEFT)) { |
| 549 | while (len < spec.field_width--) { |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 550 | if (buf < end) |
| 551 | *buf = ' '; |
| 552 | ++buf; |
| 553 | } |
| 554 | } |
| 555 | for (i = 0; i < len; ++i) { |
| 556 | if (buf < end) |
| 557 | *buf = *s; |
| 558 | ++buf; ++s; |
| 559 | } |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 560 | while (len < spec.field_width--) { |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 561 | if (buf < end) |
| 562 | *buf = ' '; |
| 563 | ++buf; |
| 564 | } |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 565 | |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 566 | return buf; |
| 567 | } |
| 568 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 569 | static char *symbol_string(char *buf, char *end, void *ptr, |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 570 | struct printf_spec spec, char ext) |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 571 | { |
| 572 | unsigned long value = (unsigned long) ptr; |
| 573 | #ifdef CONFIG_KALLSYMS |
| 574 | char sym[KSYM_SYMBOL_LEN]; |
Steven Rostedt | 91adcd2 | 2009-09-16 20:03:06 -0400 | [diff] [blame] | 575 | if (ext != 'f' && ext != 's') |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 576 | sprint_symbol(sym, value); |
| 577 | else |
| 578 | kallsyms_lookup(value, NULL, NULL, NULL, sym); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 579 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 580 | return string(buf, end, sym, spec); |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 581 | #else |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 582 | spec.field_width = 2 * sizeof(void *); |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 583 | spec.flags |= SPECIAL | SMALL | ZEROPAD; |
| 584 | spec.base = 16; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 585 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 586 | return number(buf, end, value, spec); |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 587 | #endif |
| 588 | } |
| 589 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 590 | static char *resource_string(char *buf, char *end, struct resource *res, |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 591 | struct printf_spec spec, const char *fmt) |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 592 | { |
| 593 | #ifndef IO_RSRC_PRINTK_SIZE |
Bjorn Helgaas | 2840537 | 2009-10-06 15:33:29 -0600 | [diff] [blame] | 594 | #define IO_RSRC_PRINTK_SIZE 6 |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 595 | #endif |
| 596 | |
| 597 | #ifndef MEM_RSRC_PRINTK_SIZE |
Bjorn Helgaas | 2840537 | 2009-10-06 15:33:29 -0600 | [diff] [blame] | 598 | #define MEM_RSRC_PRINTK_SIZE 10 |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 599 | #endif |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 600 | static const struct printf_spec io_spec = { |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 601 | .base = 16, |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 602 | .field_width = IO_RSRC_PRINTK_SIZE, |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 603 | .precision = -1, |
| 604 | .flags = SPECIAL | SMALL | ZEROPAD, |
| 605 | }; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 606 | static const struct printf_spec mem_spec = { |
| 607 | .base = 16, |
| 608 | .field_width = MEM_RSRC_PRINTK_SIZE, |
| 609 | .precision = -1, |
| 610 | .flags = SPECIAL | SMALL | ZEROPAD, |
| 611 | }; |
Bjorn Helgaas | 0f4050c | 2010-03-05 10:47:42 -0700 | [diff] [blame^] | 612 | static const struct printf_spec bus_spec = { |
| 613 | .base = 16, |
| 614 | .field_width = 2, |
| 615 | .precision = -1, |
| 616 | .flags = SMALL | ZEROPAD, |
| 617 | }; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 618 | static const struct printf_spec dec_spec = { |
Bjorn Helgaas | c91d337 | 2009-10-06 15:33:34 -0600 | [diff] [blame] | 619 | .base = 10, |
| 620 | .precision = -1, |
| 621 | .flags = 0, |
| 622 | }; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 623 | static const struct printf_spec str_spec = { |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 624 | .field_width = -1, |
| 625 | .precision = 10, |
| 626 | .flags = LEFT, |
| 627 | }; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 628 | static const struct printf_spec flag_spec = { |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 629 | .base = 16, |
| 630 | .precision = -1, |
| 631 | .flags = SPECIAL | SMALL, |
| 632 | }; |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 633 | |
| 634 | /* 32-bit res (sizeof==4): 10 chars in dec, 10 in hex ("0x" + 8) |
| 635 | * 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */ |
| 636 | #define RSRC_BUF_SIZE ((2 * sizeof(resource_size_t)) + 4) |
| 637 | #define FLAG_BUF_SIZE (2 * sizeof(res->flags)) |
| 638 | #define DECODED_BUF_SIZE sizeof("[mem - 64bit pref disabled]") |
| 639 | #define RAW_BUF_SIZE sizeof("[mem - flags 0x]") |
| 640 | char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE, |
| 641 | 2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)]; |
| 642 | |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 643 | char *p = sym, *pend = sym + sizeof(sym); |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 644 | int decode = (fmt[0] == 'R') ? 1 : 0; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 645 | const struct printf_spec *specp; |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 646 | |
| 647 | *p++ = '['; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 648 | if (res->flags & IORESOURCE_IO) { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 649 | p = string(p, pend, "io ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 650 | specp = &io_spec; |
| 651 | } else if (res->flags & IORESOURCE_MEM) { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 652 | p = string(p, pend, "mem ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 653 | specp = &mem_spec; |
| 654 | } else if (res->flags & IORESOURCE_IRQ) { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 655 | p = string(p, pend, "irq ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 656 | specp = &dec_spec; |
| 657 | } else if (res->flags & IORESOURCE_DMA) { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 658 | p = string(p, pend, "dma ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 659 | specp = &dec_spec; |
Bjorn Helgaas | 0f4050c | 2010-03-05 10:47:42 -0700 | [diff] [blame^] | 660 | } else if (res->flags & IORESOURCE_BUS) { |
| 661 | p = string(p, pend, "bus ", str_spec); |
| 662 | specp = &bus_spec; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 663 | } else { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 664 | p = string(p, pend, "??? ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 665 | specp = &mem_spec; |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 666 | decode = 0; |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 667 | } |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 668 | p = number(p, pend, res->start, *specp); |
Bjorn Helgaas | c91d337 | 2009-10-06 15:33:34 -0600 | [diff] [blame] | 669 | if (res->start != res->end) { |
| 670 | *p++ = '-'; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 671 | p = number(p, pend, res->end, *specp); |
Bjorn Helgaas | c91d337 | 2009-10-06 15:33:34 -0600 | [diff] [blame] | 672 | } |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 673 | if (decode) { |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 674 | if (res->flags & IORESOURCE_MEM_64) |
| 675 | p = string(p, pend, " 64bit", str_spec); |
| 676 | if (res->flags & IORESOURCE_PREFETCH) |
| 677 | p = string(p, pend, " pref", str_spec); |
| 678 | if (res->flags & IORESOURCE_DISABLED) |
| 679 | p = string(p, pend, " disabled", str_spec); |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 680 | } else { |
| 681 | p = string(p, pend, " flags ", str_spec); |
| 682 | p = number(p, pend, res->flags, flag_spec); |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 683 | } |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 684 | *p++ = ']'; |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 685 | *p = '\0'; |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 686 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 687 | return string(buf, end, sym, spec); |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 688 | } |
| 689 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 690 | static char *mac_address_string(char *buf, char *end, u8 *addr, |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 691 | struct printf_spec spec, const char *fmt) |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 692 | { |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 693 | char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")]; |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 694 | char *p = mac_addr; |
| 695 | int i; |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 696 | char separator; |
| 697 | |
| 698 | if (fmt[1] == 'F') { /* FDDI canonical format */ |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 699 | separator = '-'; |
| 700 | } else { |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 701 | separator = ':'; |
| 702 | } |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 703 | |
| 704 | for (i = 0; i < 6; i++) { |
Joe Perches | c8e0006 | 2010-01-11 00:44:14 -0800 | [diff] [blame] | 705 | p = pack_hex_byte(p, addr[i]); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 706 | if (fmt[0] == 'M' && i != 5) |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 707 | *p++ = separator; |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 708 | } |
| 709 | *p = '\0'; |
| 710 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 711 | return string(buf, end, mac_addr, spec); |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 712 | } |
| 713 | |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 714 | static char *ip4_string(char *p, const u8 *addr, const char *fmt) |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 715 | { |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 716 | int i; |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 717 | bool leading_zeros = (fmt[0] == 'i'); |
| 718 | int index; |
| 719 | int step; |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 720 | |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 721 | switch (fmt[2]) { |
| 722 | case 'h': |
| 723 | #ifdef __BIG_ENDIAN |
| 724 | index = 0; |
| 725 | step = 1; |
| 726 | #else |
| 727 | index = 3; |
| 728 | step = -1; |
| 729 | #endif |
| 730 | break; |
| 731 | case 'l': |
| 732 | index = 3; |
| 733 | step = -1; |
| 734 | break; |
| 735 | case 'n': |
| 736 | case 'b': |
| 737 | default: |
| 738 | index = 0; |
| 739 | step = 1; |
| 740 | break; |
| 741 | } |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 742 | for (i = 0; i < 4; i++) { |
| 743 | char temp[3]; /* hold each IP quad in reverse order */ |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 744 | int digits = put_dec_trunc(temp, addr[index]) - temp; |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 745 | if (leading_zeros) { |
| 746 | if (digits < 3) |
| 747 | *p++ = '0'; |
| 748 | if (digits < 2) |
| 749 | *p++ = '0'; |
| 750 | } |
| 751 | /* reverse the digits in the quad */ |
| 752 | while (digits--) |
| 753 | *p++ = temp[digits]; |
| 754 | if (i < 3) |
| 755 | *p++ = '.'; |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 756 | index += step; |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 757 | } |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 758 | *p = '\0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 759 | |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 760 | return p; |
| 761 | } |
| 762 | |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 763 | static char *ip6_compressed_string(char *p, const char *addr) |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 764 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 765 | int i, j, range; |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 766 | unsigned char zerolength[8]; |
| 767 | int longest = 1; |
| 768 | int colonpos = -1; |
| 769 | u16 word; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 770 | u8 hi, lo; |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 771 | bool needcolon = false; |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 772 | bool useIPv4; |
| 773 | struct in6_addr in6; |
| 774 | |
| 775 | memcpy(&in6, addr, sizeof(struct in6_addr)); |
| 776 | |
| 777 | useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 778 | |
| 779 | memset(zerolength, 0, sizeof(zerolength)); |
| 780 | |
| 781 | if (useIPv4) |
| 782 | range = 6; |
| 783 | else |
| 784 | range = 8; |
| 785 | |
| 786 | /* find position of longest 0 run */ |
| 787 | for (i = 0; i < range; i++) { |
| 788 | for (j = i; j < range; j++) { |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 789 | if (in6.s6_addr16[j] != 0) |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 790 | break; |
| 791 | zerolength[i]++; |
| 792 | } |
| 793 | } |
| 794 | for (i = 0; i < range; i++) { |
| 795 | if (zerolength[i] > longest) { |
| 796 | longest = zerolength[i]; |
| 797 | colonpos = i; |
| 798 | } |
| 799 | } |
| 800 | |
| 801 | /* emit address */ |
| 802 | for (i = 0; i < range; i++) { |
| 803 | if (i == colonpos) { |
| 804 | if (needcolon || i == 0) |
| 805 | *p++ = ':'; |
| 806 | *p++ = ':'; |
| 807 | needcolon = false; |
| 808 | i += longest - 1; |
| 809 | continue; |
| 810 | } |
| 811 | if (needcolon) { |
| 812 | *p++ = ':'; |
| 813 | needcolon = false; |
| 814 | } |
| 815 | /* hex u16 without leading 0s */ |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 816 | word = ntohs(in6.s6_addr16[i]); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 817 | hi = word >> 8; |
| 818 | lo = word & 0xff; |
| 819 | if (hi) { |
| 820 | if (hi > 0x0f) |
| 821 | p = pack_hex_byte(p, hi); |
| 822 | else |
| 823 | *p++ = hex_asc_lo(hi); |
André Goddard Rosa | b5ff992 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 824 | p = pack_hex_byte(p, lo); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 825 | } |
André Goddard Rosa | b5ff992 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 826 | else if (lo > 0x0f) |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 827 | p = pack_hex_byte(p, lo); |
| 828 | else |
| 829 | *p++ = hex_asc_lo(lo); |
| 830 | needcolon = true; |
| 831 | } |
| 832 | |
| 833 | if (useIPv4) { |
| 834 | if (needcolon) |
| 835 | *p++ = ':'; |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 836 | p = ip4_string(p, &in6.s6_addr[12], "I4"); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 837 | } |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 838 | *p = '\0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 839 | |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 840 | return p; |
| 841 | } |
| 842 | |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 843 | static char *ip6_string(char *p, const char *addr, const char *fmt) |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 844 | { |
| 845 | int i; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 846 | |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 847 | for (i = 0; i < 8; i++) { |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 848 | p = pack_hex_byte(p, *addr++); |
| 849 | p = pack_hex_byte(p, *addr++); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 850 | if (fmt[0] == 'I' && i != 7) |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 851 | *p++ = ':'; |
| 852 | } |
| 853 | *p = '\0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 854 | |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 855 | return p; |
| 856 | } |
| 857 | |
| 858 | static char *ip6_addr_string(char *buf, char *end, const u8 *addr, |
| 859 | struct printf_spec spec, const char *fmt) |
| 860 | { |
| 861 | char ip6_addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")]; |
| 862 | |
| 863 | if (fmt[0] == 'I' && fmt[2] == 'c') |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 864 | ip6_compressed_string(ip6_addr, addr); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 865 | else |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 866 | ip6_string(ip6_addr, addr, fmt); |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 867 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 868 | return string(buf, end, ip6_addr, spec); |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 869 | } |
| 870 | |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 871 | static char *ip4_addr_string(char *buf, char *end, const u8 *addr, |
| 872 | struct printf_spec spec, const char *fmt) |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 873 | { |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 874 | char ip4_addr[sizeof("255.255.255.255")]; |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 875 | |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 876 | ip4_string(ip4_addr, addr, fmt); |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 877 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 878 | return string(buf, end, ip4_addr, spec); |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 879 | } |
| 880 | |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 881 | static char *uuid_string(char *buf, char *end, const u8 *addr, |
| 882 | struct printf_spec spec, const char *fmt) |
| 883 | { |
| 884 | char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")]; |
| 885 | char *p = uuid; |
| 886 | int i; |
| 887 | static const u8 be[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; |
| 888 | static const u8 le[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15}; |
| 889 | const u8 *index = be; |
| 890 | bool uc = false; |
| 891 | |
| 892 | switch (*(++fmt)) { |
| 893 | case 'L': |
| 894 | uc = true; /* fall-through */ |
| 895 | case 'l': |
| 896 | index = le; |
| 897 | break; |
| 898 | case 'B': |
| 899 | uc = true; |
| 900 | break; |
| 901 | } |
| 902 | |
| 903 | for (i = 0; i < 16; i++) { |
| 904 | p = pack_hex_byte(p, addr[index[i]]); |
| 905 | switch (i) { |
| 906 | case 3: |
| 907 | case 5: |
| 908 | case 7: |
| 909 | case 9: |
| 910 | *p++ = '-'; |
| 911 | break; |
| 912 | } |
| 913 | } |
| 914 | |
| 915 | *p = 0; |
| 916 | |
| 917 | if (uc) { |
| 918 | p = uuid; |
| 919 | do { |
| 920 | *p = toupper(*p); |
| 921 | } while (*(++p)); |
| 922 | } |
| 923 | |
| 924 | return string(buf, end, uuid, spec); |
| 925 | } |
| 926 | |
Linus Torvalds | 4d8a743 | 2008-07-06 16:24:57 -0700 | [diff] [blame] | 927 | /* |
| 928 | * Show a '%p' thing. A kernel extension is that the '%p' is followed |
| 929 | * by an extra set of alphanumeric characters that are extended format |
| 930 | * specifiers. |
| 931 | * |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 932 | * Right now we handle: |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 933 | * |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 934 | * - 'F' For symbolic function descriptor pointers with offset |
| 935 | * - 'f' For simple symbolic function names without offset |
Steven Rostedt | 0efb4d2 | 2009-09-17 09:27:29 -0400 | [diff] [blame] | 936 | * - 'S' For symbolic direct pointers with offset |
| 937 | * - 's' For symbolic direct pointers without offset |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 938 | * - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref] |
| 939 | * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201] |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 940 | * - 'M' For a 6-byte MAC address, it prints the address in the |
| 941 | * usual colon-separated hex notation |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 942 | * - 'm' For a 6-byte MAC address, it prints the hex address without colons |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 943 | * - 'MF' For a 6-byte MAC FDDI address, it prints the address |
Joe Perches | c8e0006 | 2010-01-11 00:44:14 -0800 | [diff] [blame] | 944 | * with a dash-separated hex notation |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 945 | * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way |
| 946 | * IPv4 uses dot-separated decimal without leading 0's (1.2.3.4) |
| 947 | * IPv6 uses colon separated network-order 16 bit hex with leading 0's |
| 948 | * - 'i' [46] for 'raw' IPv4/IPv6 addresses |
| 949 | * IPv6 omits the colons (01020304...0f) |
| 950 | * IPv4 uses dot-separated decimal with leading 0's (010.123.045.006) |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 951 | * - '[Ii]4[hnbl]' IPv4 addresses in host, network, big or little endian order |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 952 | * - 'I6c' for IPv6 addresses printed as specified by |
Uwe Kleine-König | 3f47240 | 2010-01-08 14:43:02 -0800 | [diff] [blame] | 953 | * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 954 | * - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form |
| 955 | * "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" |
| 956 | * Options for %pU are: |
| 957 | * b big endian lower case hex (default) |
| 958 | * B big endian UPPER case hex |
| 959 | * l little endian lower case hex |
| 960 | * L little endian UPPER case hex |
| 961 | * big endian output byte order is: |
| 962 | * [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15] |
| 963 | * little endian output byte order is: |
| 964 | * [3][2][1][0]-[5][4]-[7][6]-[8][9]-[10][11][12][13][14][15] |
| 965 | * |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 966 | * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 |
| 967 | * function pointers are really function descriptors, which contain a |
| 968 | * pointer to the real address. |
Linus Torvalds | 4d8a743 | 2008-07-06 16:24:57 -0700 | [diff] [blame] | 969 | */ |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 970 | static char *pointer(const char *fmt, char *buf, char *end, void *ptr, |
| 971 | struct printf_spec spec) |
Linus Torvalds | 78a8bf6 | 2008-07-06 16:16:15 -0700 | [diff] [blame] | 972 | { |
Linus Torvalds | d97106a | 2009-01-03 11:46:17 -0800 | [diff] [blame] | 973 | if (!ptr) |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 974 | return string(buf, end, "(null)", spec); |
Linus Torvalds | d97106a | 2009-01-03 11:46:17 -0800 | [diff] [blame] | 975 | |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 976 | switch (*fmt) { |
| 977 | case 'F': |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 978 | case 'f': |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 979 | ptr = dereference_function_descriptor(ptr); |
| 980 | /* Fallthrough */ |
| 981 | case 'S': |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 982 | case 's': |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 983 | return symbol_string(buf, end, ptr, spec, *fmt); |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 984 | case 'R': |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 985 | case 'r': |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 986 | return resource_string(buf, end, ptr, spec, fmt); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 987 | case 'M': /* Colon separated: 00:01:02:03:04:05 */ |
| 988 | case 'm': /* Contiguous: 000102030405 */ |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 989 | /* [mM]F (FDDI, bit reversed) */ |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 990 | return mac_address_string(buf, end, ptr, spec, fmt); |
| 991 | case 'I': /* Formatted IP supported |
| 992 | * 4: 1.2.3.4 |
| 993 | * 6: 0001:0203:...:0708 |
| 994 | * 6c: 1::708 or 1::1.2.3.4 |
| 995 | */ |
| 996 | case 'i': /* Contiguous: |
| 997 | * 4: 001.002.003.004 |
| 998 | * 6: 000102...0f |
| 999 | */ |
| 1000 | switch (fmt[1]) { |
| 1001 | case '6': |
| 1002 | return ip6_addr_string(buf, end, ptr, spec, fmt); |
| 1003 | case '4': |
| 1004 | return ip4_addr_string(buf, end, ptr, spec, fmt); |
| 1005 | } |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 1006 | break; |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 1007 | case 'U': |
| 1008 | return uuid_string(buf, end, ptr, spec, fmt); |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 1009 | } |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1010 | spec.flags |= SMALL; |
| 1011 | if (spec.field_width == -1) { |
| 1012 | spec.field_width = 2*sizeof(void *); |
| 1013 | spec.flags |= ZEROPAD; |
Linus Torvalds | 78a8bf6 | 2008-07-06 16:16:15 -0700 | [diff] [blame] | 1014 | } |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1015 | spec.base = 16; |
| 1016 | |
| 1017 | return number(buf, end, (unsigned long) ptr, spec); |
| 1018 | } |
| 1019 | |
| 1020 | /* |
| 1021 | * Helper function to decode printf style format. |
| 1022 | * Each call decode a token from the format and return the |
| 1023 | * number of characters read (or likely the delta where it wants |
| 1024 | * to go on the next call). |
| 1025 | * The decoded token is returned through the parameters |
| 1026 | * |
| 1027 | * 'h', 'l', or 'L' for integer fields |
| 1028 | * 'z' support added 23/7/1999 S.H. |
| 1029 | * 'z' changed to 'Z' --davidm 1/25/99 |
| 1030 | * 't' added for ptrdiff_t |
| 1031 | * |
| 1032 | * @fmt: the format string |
| 1033 | * @type of the token returned |
| 1034 | * @flags: various flags such as +, -, # tokens.. |
| 1035 | * @field_width: overwritten width |
| 1036 | * @base: base of the number (octal, hex, ...) |
| 1037 | * @precision: precision of a number |
| 1038 | * @qualifier: qualifier of a number (long, size_t, ...) |
| 1039 | */ |
| 1040 | static int format_decode(const char *fmt, struct printf_spec *spec) |
| 1041 | { |
| 1042 | const char *start = fmt; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1043 | |
| 1044 | /* we finished early by reading the field width */ |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1045 | if (spec->type == FORMAT_TYPE_WIDTH) { |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1046 | if (spec->field_width < 0) { |
| 1047 | spec->field_width = -spec->field_width; |
| 1048 | spec->flags |= LEFT; |
| 1049 | } |
| 1050 | spec->type = FORMAT_TYPE_NONE; |
| 1051 | goto precision; |
| 1052 | } |
| 1053 | |
| 1054 | /* we finished early by reading the precision */ |
| 1055 | if (spec->type == FORMAT_TYPE_PRECISION) { |
| 1056 | if (spec->precision < 0) |
| 1057 | spec->precision = 0; |
| 1058 | |
| 1059 | spec->type = FORMAT_TYPE_NONE; |
| 1060 | goto qualifier; |
| 1061 | } |
| 1062 | |
| 1063 | /* By default */ |
| 1064 | spec->type = FORMAT_TYPE_NONE; |
| 1065 | |
| 1066 | for (; *fmt ; ++fmt) { |
| 1067 | if (*fmt == '%') |
| 1068 | break; |
| 1069 | } |
| 1070 | |
| 1071 | /* Return the current non-format string */ |
| 1072 | if (fmt != start || !*fmt) |
| 1073 | return fmt - start; |
| 1074 | |
| 1075 | /* Process flags */ |
| 1076 | spec->flags = 0; |
| 1077 | |
| 1078 | while (1) { /* this also skips first '%' */ |
| 1079 | bool found = true; |
| 1080 | |
| 1081 | ++fmt; |
| 1082 | |
| 1083 | switch (*fmt) { |
| 1084 | case '-': spec->flags |= LEFT; break; |
| 1085 | case '+': spec->flags |= PLUS; break; |
| 1086 | case ' ': spec->flags |= SPACE; break; |
| 1087 | case '#': spec->flags |= SPECIAL; break; |
| 1088 | case '0': spec->flags |= ZEROPAD; break; |
| 1089 | default: found = false; |
| 1090 | } |
| 1091 | |
| 1092 | if (!found) |
| 1093 | break; |
| 1094 | } |
| 1095 | |
| 1096 | /* get field width */ |
| 1097 | spec->field_width = -1; |
| 1098 | |
| 1099 | if (isdigit(*fmt)) |
| 1100 | spec->field_width = skip_atoi(&fmt); |
| 1101 | else if (*fmt == '*') { |
| 1102 | /* it's the next argument */ |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1103 | spec->type = FORMAT_TYPE_WIDTH; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1104 | return ++fmt - start; |
| 1105 | } |
| 1106 | |
| 1107 | precision: |
| 1108 | /* get the precision */ |
| 1109 | spec->precision = -1; |
| 1110 | if (*fmt == '.') { |
| 1111 | ++fmt; |
| 1112 | if (isdigit(*fmt)) { |
| 1113 | spec->precision = skip_atoi(&fmt); |
| 1114 | if (spec->precision < 0) |
| 1115 | spec->precision = 0; |
| 1116 | } else if (*fmt == '*') { |
| 1117 | /* it's the next argument */ |
Vegard Nossum | adf26f8 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1118 | spec->type = FORMAT_TYPE_PRECISION; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1119 | return ++fmt - start; |
| 1120 | } |
| 1121 | } |
| 1122 | |
| 1123 | qualifier: |
| 1124 | /* get the conversion qualifier */ |
| 1125 | spec->qualifier = -1; |
André Goddard Rosa | 08562cb | 2009-12-14 18:00:58 -0800 | [diff] [blame] | 1126 | if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || |
| 1127 | TOLOWER(*fmt) == 'z' || *fmt == 't') { |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1128 | spec->qualifier = *fmt++; |
| 1129 | if (unlikely(spec->qualifier == *fmt)) { |
| 1130 | if (spec->qualifier == 'l') { |
| 1131 | spec->qualifier = 'L'; |
| 1132 | ++fmt; |
| 1133 | } else if (spec->qualifier == 'h') { |
| 1134 | spec->qualifier = 'H'; |
| 1135 | ++fmt; |
| 1136 | } |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1137 | } |
| 1138 | } |
| 1139 | |
| 1140 | /* default base */ |
| 1141 | spec->base = 10; |
| 1142 | switch (*fmt) { |
| 1143 | case 'c': |
| 1144 | spec->type = FORMAT_TYPE_CHAR; |
| 1145 | return ++fmt - start; |
| 1146 | |
| 1147 | case 's': |
| 1148 | spec->type = FORMAT_TYPE_STR; |
| 1149 | return ++fmt - start; |
| 1150 | |
| 1151 | case 'p': |
| 1152 | spec->type = FORMAT_TYPE_PTR; |
| 1153 | return fmt - start; |
| 1154 | /* skip alnum */ |
| 1155 | |
| 1156 | case 'n': |
| 1157 | spec->type = FORMAT_TYPE_NRCHARS; |
| 1158 | return ++fmt - start; |
| 1159 | |
| 1160 | case '%': |
| 1161 | spec->type = FORMAT_TYPE_PERCENT_CHAR; |
| 1162 | return ++fmt - start; |
| 1163 | |
| 1164 | /* integer number formats - set up the flags and "break" */ |
| 1165 | case 'o': |
| 1166 | spec->base = 8; |
| 1167 | break; |
| 1168 | |
| 1169 | case 'x': |
| 1170 | spec->flags |= SMALL; |
| 1171 | |
| 1172 | case 'X': |
| 1173 | spec->base = 16; |
| 1174 | break; |
| 1175 | |
| 1176 | case 'd': |
| 1177 | case 'i': |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1178 | spec->flags |= SIGN; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1179 | case 'u': |
| 1180 | break; |
| 1181 | |
| 1182 | default: |
| 1183 | spec->type = FORMAT_TYPE_INVALID; |
| 1184 | return fmt - start; |
| 1185 | } |
| 1186 | |
| 1187 | if (spec->qualifier == 'L') |
| 1188 | spec->type = FORMAT_TYPE_LONG_LONG; |
| 1189 | else if (spec->qualifier == 'l') { |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1190 | if (spec->flags & SIGN) |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1191 | spec->type = FORMAT_TYPE_LONG; |
| 1192 | else |
| 1193 | spec->type = FORMAT_TYPE_ULONG; |
André Goddard Rosa | 08562cb | 2009-12-14 18:00:58 -0800 | [diff] [blame] | 1194 | } else if (TOLOWER(spec->qualifier) == 'z') { |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1195 | spec->type = FORMAT_TYPE_SIZE_T; |
| 1196 | } else if (spec->qualifier == 't') { |
| 1197 | spec->type = FORMAT_TYPE_PTRDIFF; |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1198 | } else if (spec->qualifier == 'H') { |
| 1199 | if (spec->flags & SIGN) |
| 1200 | spec->type = FORMAT_TYPE_BYTE; |
| 1201 | else |
| 1202 | spec->type = FORMAT_TYPE_UBYTE; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1203 | } else if (spec->qualifier == 'h') { |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1204 | if (spec->flags & SIGN) |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1205 | spec->type = FORMAT_TYPE_SHORT; |
| 1206 | else |
| 1207 | spec->type = FORMAT_TYPE_USHORT; |
| 1208 | } else { |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1209 | if (spec->flags & SIGN) |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1210 | spec->type = FORMAT_TYPE_INT; |
| 1211 | else |
| 1212 | spec->type = FORMAT_TYPE_UINT; |
| 1213 | } |
| 1214 | |
| 1215 | return ++fmt - start; |
Linus Torvalds | 78a8bf6 | 2008-07-06 16:16:15 -0700 | [diff] [blame] | 1216 | } |
| 1217 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | /** |
| 1219 | * vsnprintf - Format a string and place it in a buffer |
| 1220 | * @buf: The buffer to place the result into |
| 1221 | * @size: The size of the buffer, including the trailing null space |
| 1222 | * @fmt: The format string to use |
| 1223 | * @args: Arguments for the format string |
| 1224 | * |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1225 | * This function follows C99 vsnprintf, but has some extensions: |
Steven Rostedt | 91adcd2 | 2009-09-16 20:03:06 -0400 | [diff] [blame] | 1226 | * %pS output the name of a text symbol with offset |
| 1227 | * %ps output the name of a text symbol without offset |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 1228 | * %pF output the name of a function pointer with its offset |
| 1229 | * %pf output the name of a function pointer without its offset |
Uwe Kleine-König | 8a79503 | 2009-12-17 15:27:12 -0800 | [diff] [blame] | 1230 | * %pR output the address range in a struct resource with decoded flags |
| 1231 | * %pr output the address range in a struct resource with raw flags |
| 1232 | * %pM output a 6-byte MAC address with colons |
| 1233 | * %pm output a 6-byte MAC address without colons |
| 1234 | * %pI4 print an IPv4 address without leading zeros |
| 1235 | * %pi4 print an IPv4 address with leading zeros |
| 1236 | * %pI6 print an IPv6 address with colons |
| 1237 | * %pi6 print an IPv6 address without colons |
| 1238 | * %pI6c print an IPv6 address as specified by |
Uwe Kleine-König | 3f47240 | 2010-01-08 14:43:02 -0800 | [diff] [blame] | 1239 | * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 |
Uwe Kleine-König | 8a79503 | 2009-12-17 15:27:12 -0800 | [diff] [blame] | 1240 | * %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper |
| 1241 | * case. |
Steven Rostedt | 0efb4d2 | 2009-09-17 09:27:29 -0400 | [diff] [blame] | 1242 | * %n is ignored |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1243 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1244 | * The return value is the number of characters which would |
| 1245 | * be generated for the given input, excluding the trailing |
| 1246 | * '\0', as per ISO C99. If you want to have the exact |
| 1247 | * number of characters written into @buf as return value |
Robert P. J. Day | 72fd4a3 | 2007-02-10 01:45:59 -0800 | [diff] [blame] | 1248 | * (not including the trailing '\0'), use vscnprintf(). If the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | * return is greater than or equal to @size, the resulting |
| 1250 | * string is truncated. |
| 1251 | * |
| 1252 | * Call this function if you are already dealing with a va_list. |
Robert P. J. Day | 72fd4a3 | 2007-02-10 01:45:59 -0800 | [diff] [blame] | 1253 | * You probably want snprintf() instead. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | */ |
| 1255 | int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) |
| 1256 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1257 | unsigned long long num; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1258 | char *str, *end; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1259 | struct printf_spec spec = {0}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1261 | /* Reject out-of-range values early. Large positive sizes are |
| 1262 | used for unknown buffer sizes. */ |
Marcin Slusarz | 2f30b1f9 | 2009-09-21 17:04:29 -0700 | [diff] [blame] | 1263 | if (WARN_ON_ONCE((int) size < 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | |
| 1266 | str = buf; |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1267 | end = buf + size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1268 | |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1269 | /* Make sure end is always >= buf */ |
| 1270 | if (end < buf) { |
| 1271 | end = ((void *)-1); |
| 1272 | size = end - buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | } |
| 1274 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1275 | while (*fmt) { |
| 1276 | const char *old_fmt = fmt; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1277 | int read = format_decode(fmt, &spec); |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1278 | |
| 1279 | fmt += read; |
| 1280 | |
| 1281 | switch (spec.type) { |
| 1282 | case FORMAT_TYPE_NONE: { |
| 1283 | int copy = read; |
| 1284 | if (str < end) { |
| 1285 | if (copy > end - str) |
| 1286 | copy = end - str; |
| 1287 | memcpy(str, old_fmt, copy); |
| 1288 | } |
| 1289 | str += read; |
| 1290 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | } |
| 1292 | |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1293 | case FORMAT_TYPE_WIDTH: |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1294 | spec.field_width = va_arg(args, int); |
| 1295 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1297 | case FORMAT_TYPE_PRECISION: |
| 1298 | spec.precision = va_arg(args, int); |
| 1299 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1300 | |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1301 | case FORMAT_TYPE_CHAR: { |
| 1302 | char c; |
| 1303 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1304 | if (!(spec.flags & LEFT)) { |
| 1305 | while (--spec.field_width > 0) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1306 | if (str < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1307 | *str = ' '; |
| 1308 | ++str; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1309 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | } |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1311 | } |
| 1312 | c = (unsigned char) va_arg(args, int); |
| 1313 | if (str < end) |
| 1314 | *str = c; |
| 1315 | ++str; |
| 1316 | while (--spec.field_width > 0) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1317 | if (str < end) |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1318 | *str = ' '; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1319 | ++str; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1320 | } |
| 1321 | break; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1322 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1323 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1324 | case FORMAT_TYPE_STR: |
| 1325 | str = string(str, end, va_arg(args, char *), spec); |
| 1326 | break; |
| 1327 | |
| 1328 | case FORMAT_TYPE_PTR: |
| 1329 | str = pointer(fmt+1, str, end, va_arg(args, void *), |
| 1330 | spec); |
| 1331 | while (isalnum(*fmt)) |
| 1332 | fmt++; |
| 1333 | break; |
| 1334 | |
| 1335 | case FORMAT_TYPE_PERCENT_CHAR: |
| 1336 | if (str < end) |
| 1337 | *str = '%'; |
| 1338 | ++str; |
| 1339 | break; |
| 1340 | |
| 1341 | case FORMAT_TYPE_INVALID: |
| 1342 | if (str < end) |
| 1343 | *str = '%'; |
| 1344 | ++str; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1345 | break; |
| 1346 | |
| 1347 | case FORMAT_TYPE_NRCHARS: { |
Joe Perches | ef0658f | 2010-03-06 17:10:14 -0800 | [diff] [blame] | 1348 | u8 qualifier = spec.qualifier; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1349 | |
| 1350 | if (qualifier == 'l') { |
| 1351 | long *ip = va_arg(args, long *); |
| 1352 | *ip = (str - buf); |
André Goddard Rosa | 08562cb | 2009-12-14 18:00:58 -0800 | [diff] [blame] | 1353 | } else if (TOLOWER(qualifier) == 'z') { |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1354 | size_t *ip = va_arg(args, size_t *); |
| 1355 | *ip = (str - buf); |
| 1356 | } else { |
| 1357 | int *ip = va_arg(args, int *); |
| 1358 | *ip = (str - buf); |
| 1359 | } |
| 1360 | break; |
| 1361 | } |
| 1362 | |
| 1363 | default: |
| 1364 | switch (spec.type) { |
| 1365 | case FORMAT_TYPE_LONG_LONG: |
| 1366 | num = va_arg(args, long long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1367 | break; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1368 | case FORMAT_TYPE_ULONG: |
| 1369 | num = va_arg(args, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | break; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1371 | case FORMAT_TYPE_LONG: |
| 1372 | num = va_arg(args, long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | break; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1374 | case FORMAT_TYPE_SIZE_T: |
| 1375 | num = va_arg(args, size_t); |
| 1376 | break; |
| 1377 | case FORMAT_TYPE_PTRDIFF: |
| 1378 | num = va_arg(args, ptrdiff_t); |
| 1379 | break; |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1380 | case FORMAT_TYPE_UBYTE: |
| 1381 | num = (unsigned char) va_arg(args, int); |
| 1382 | break; |
| 1383 | case FORMAT_TYPE_BYTE: |
| 1384 | num = (signed char) va_arg(args, int); |
| 1385 | break; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1386 | case FORMAT_TYPE_USHORT: |
| 1387 | num = (unsigned short) va_arg(args, int); |
| 1388 | break; |
| 1389 | case FORMAT_TYPE_SHORT: |
| 1390 | num = (short) va_arg(args, int); |
| 1391 | break; |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1392 | case FORMAT_TYPE_INT: |
| 1393 | num = (int) va_arg(args, int); |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1394 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1395 | default: |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1396 | num = va_arg(args, unsigned int); |
| 1397 | } |
| 1398 | |
| 1399 | str = number(str, end, num, spec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1401 | } |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1402 | |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1403 | if (size > 0) { |
| 1404 | if (str < end) |
| 1405 | *str = '\0'; |
| 1406 | else |
Linus Torvalds | 0a6047e | 2006-06-28 17:09:34 -0700 | [diff] [blame] | 1407 | end[-1] = '\0'; |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1408 | } |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1409 | |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1410 | /* the trailing null byte doesn't count towards the total */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | return str-buf; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1412 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1413 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1414 | EXPORT_SYMBOL(vsnprintf); |
| 1415 | |
| 1416 | /** |
| 1417 | * vscnprintf - Format a string and place it in a buffer |
| 1418 | * @buf: The buffer to place the result into |
| 1419 | * @size: The size of the buffer, including the trailing null space |
| 1420 | * @fmt: The format string to use |
| 1421 | * @args: Arguments for the format string |
| 1422 | * |
| 1423 | * The return value is the number of characters which have been written into |
| 1424 | * the @buf not including the trailing '\0'. If @size is <= 0 the function |
| 1425 | * returns 0. |
| 1426 | * |
| 1427 | * Call this function if you are already dealing with a va_list. |
Robert P. J. Day | 72fd4a3 | 2007-02-10 01:45:59 -0800 | [diff] [blame] | 1428 | * You probably want scnprintf() instead. |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1429 | * |
| 1430 | * See the vsnprintf() documentation for format string extensions over C99. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | */ |
| 1432 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) |
| 1433 | { |
| 1434 | int i; |
| 1435 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1436 | i = vsnprintf(buf, size, fmt, args); |
| 1437 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1438 | return (i >= size) ? (size - 1) : i; |
| 1439 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | EXPORT_SYMBOL(vscnprintf); |
| 1441 | |
| 1442 | /** |
| 1443 | * snprintf - Format a string and place it in a buffer |
| 1444 | * @buf: The buffer to place the result into |
| 1445 | * @size: The size of the buffer, including the trailing null space |
| 1446 | * @fmt: The format string to use |
| 1447 | * @...: Arguments for the format string |
| 1448 | * |
| 1449 | * The return value is the number of characters which would be |
| 1450 | * generated for the given input, excluding the trailing null, |
| 1451 | * as per ISO C99. If the return is greater than or equal to |
| 1452 | * @size, the resulting string is truncated. |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1453 | * |
| 1454 | * See the vsnprintf() documentation for format string extensions over C99. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1455 | */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1456 | int snprintf(char *buf, size_t size, const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | { |
| 1458 | va_list args; |
| 1459 | int i; |
| 1460 | |
| 1461 | va_start(args, fmt); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1462 | i = vsnprintf(buf, size, fmt, args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1463 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1464 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1465 | return i; |
| 1466 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1467 | EXPORT_SYMBOL(snprintf); |
| 1468 | |
| 1469 | /** |
| 1470 | * scnprintf - Format a string and place it in a buffer |
| 1471 | * @buf: The buffer to place the result into |
| 1472 | * @size: The size of the buffer, including the trailing null space |
| 1473 | * @fmt: The format string to use |
| 1474 | * @...: Arguments for the format string |
| 1475 | * |
| 1476 | * The return value is the number of characters written into @buf not including |
Martin Peschke | ea6f328 | 2007-02-12 00:51:56 -0800 | [diff] [blame] | 1477 | * the trailing '\0'. If @size is <= 0 the function returns 0. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | */ |
| 1479 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1480 | int scnprintf(char *buf, size_t size, const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1481 | { |
| 1482 | va_list args; |
| 1483 | int i; |
| 1484 | |
| 1485 | va_start(args, fmt); |
| 1486 | i = vsnprintf(buf, size, fmt, args); |
| 1487 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1488 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1489 | return (i >= size) ? (size - 1) : i; |
| 1490 | } |
| 1491 | EXPORT_SYMBOL(scnprintf); |
| 1492 | |
| 1493 | /** |
| 1494 | * vsprintf - Format a string and place it in a buffer |
| 1495 | * @buf: The buffer to place the result into |
| 1496 | * @fmt: The format string to use |
| 1497 | * @args: Arguments for the format string |
| 1498 | * |
| 1499 | * The function returns the number of characters written |
Robert P. J. Day | 72fd4a3 | 2007-02-10 01:45:59 -0800 | [diff] [blame] | 1500 | * into @buf. Use vsnprintf() or vscnprintf() in order to avoid |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1501 | * buffer overflows. |
| 1502 | * |
| 1503 | * Call this function if you are already dealing with a va_list. |
Robert P. J. Day | 72fd4a3 | 2007-02-10 01:45:59 -0800 | [diff] [blame] | 1504 | * You probably want sprintf() instead. |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1505 | * |
| 1506 | * See the vsnprintf() documentation for format string extensions over C99. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | */ |
| 1508 | int vsprintf(char *buf, const char *fmt, va_list args) |
| 1509 | { |
| 1510 | return vsnprintf(buf, INT_MAX, fmt, args); |
| 1511 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1512 | EXPORT_SYMBOL(vsprintf); |
| 1513 | |
| 1514 | /** |
| 1515 | * sprintf - Format a string and place it in a buffer |
| 1516 | * @buf: The buffer to place the result into |
| 1517 | * @fmt: The format string to use |
| 1518 | * @...: Arguments for the format string |
| 1519 | * |
| 1520 | * The function returns the number of characters written |
Robert P. J. Day | 72fd4a3 | 2007-02-10 01:45:59 -0800 | [diff] [blame] | 1521 | * into @buf. Use snprintf() or scnprintf() in order to avoid |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | * buffer overflows. |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1523 | * |
| 1524 | * See the vsnprintf() documentation for format string extensions over C99. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1525 | */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1526 | int sprintf(char *buf, const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1527 | { |
| 1528 | va_list args; |
| 1529 | int i; |
| 1530 | |
| 1531 | va_start(args, fmt); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1532 | i = vsnprintf(buf, INT_MAX, fmt, args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1533 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1534 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | return i; |
| 1536 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | EXPORT_SYMBOL(sprintf); |
| 1538 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1539 | #ifdef CONFIG_BINARY_PRINTF |
| 1540 | /* |
| 1541 | * bprintf service: |
| 1542 | * vbin_printf() - VA arguments to binary data |
| 1543 | * bstr_printf() - Binary data to text string |
| 1544 | */ |
| 1545 | |
| 1546 | /** |
| 1547 | * vbin_printf - Parse a format string and place args' binary value in a buffer |
| 1548 | * @bin_buf: The buffer to place args' binary value |
| 1549 | * @size: The size of the buffer(by words(32bits), not characters) |
| 1550 | * @fmt: The format string to use |
| 1551 | * @args: Arguments for the format string |
| 1552 | * |
| 1553 | * The format follows C99 vsnprintf, except %n is ignored, and its argument |
| 1554 | * is skiped. |
| 1555 | * |
| 1556 | * The return value is the number of words(32bits) which would be generated for |
| 1557 | * the given input. |
| 1558 | * |
| 1559 | * NOTE: |
| 1560 | * If the return value is greater than @size, the resulting bin_buf is NOT |
| 1561 | * valid for bstr_printf(). |
| 1562 | */ |
| 1563 | int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args) |
| 1564 | { |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1565 | struct printf_spec spec = {0}; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1566 | char *str, *end; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1567 | |
| 1568 | str = (char *)bin_buf; |
| 1569 | end = (char *)(bin_buf + size); |
| 1570 | |
| 1571 | #define save_arg(type) \ |
| 1572 | do { \ |
| 1573 | if (sizeof(type) == 8) { \ |
| 1574 | unsigned long long value; \ |
| 1575 | str = PTR_ALIGN(str, sizeof(u32)); \ |
| 1576 | value = va_arg(args, unsigned long long); \ |
| 1577 | if (str + sizeof(type) <= end) { \ |
| 1578 | *(u32 *)str = *(u32 *)&value; \ |
| 1579 | *(u32 *)(str + 4) = *((u32 *)&value + 1); \ |
| 1580 | } \ |
| 1581 | } else { \ |
| 1582 | unsigned long value; \ |
| 1583 | str = PTR_ALIGN(str, sizeof(type)); \ |
| 1584 | value = va_arg(args, int); \ |
| 1585 | if (str + sizeof(type) <= end) \ |
| 1586 | *(typeof(type) *)str = (type)value; \ |
| 1587 | } \ |
| 1588 | str += sizeof(type); \ |
| 1589 | } while (0) |
| 1590 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1591 | while (*fmt) { |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1592 | int read = format_decode(fmt, &spec); |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1593 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1594 | fmt += read; |
| 1595 | |
| 1596 | switch (spec.type) { |
| 1597 | case FORMAT_TYPE_NONE: |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1598 | case FORMAT_TYPE_INVALID: |
| 1599 | case FORMAT_TYPE_PERCENT_CHAR: |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1600 | break; |
| 1601 | |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1602 | case FORMAT_TYPE_WIDTH: |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1603 | case FORMAT_TYPE_PRECISION: |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1604 | save_arg(int); |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1605 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1606 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1607 | case FORMAT_TYPE_CHAR: |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1608 | save_arg(char); |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1609 | break; |
| 1610 | |
| 1611 | case FORMAT_TYPE_STR: { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1612 | const char *save_str = va_arg(args, char *); |
| 1613 | size_t len; |
André Goddard Rosa | 6c35663 | 2009-12-14 18:00:56 -0800 | [diff] [blame] | 1614 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1615 | if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE |
| 1616 | || (unsigned long)save_str < PAGE_SIZE) |
André Goddard Rosa | 0f4f81d | 2009-12-14 18:00:55 -0800 | [diff] [blame] | 1617 | save_str = "(null)"; |
André Goddard Rosa | 6c35663 | 2009-12-14 18:00:56 -0800 | [diff] [blame] | 1618 | len = strlen(save_str) + 1; |
| 1619 | if (str + len < end) |
| 1620 | memcpy(str, save_str, len); |
| 1621 | str += len; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1622 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1623 | } |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1624 | |
| 1625 | case FORMAT_TYPE_PTR: |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1626 | save_arg(void *); |
| 1627 | /* skip all alphanumeric pointer suffixes */ |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1628 | while (isalnum(*fmt)) |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1629 | fmt++; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1630 | break; |
| 1631 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1632 | case FORMAT_TYPE_NRCHARS: { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1633 | /* skip %n 's argument */ |
Joe Perches | ef0658f | 2010-03-06 17:10:14 -0800 | [diff] [blame] | 1634 | u8 qualifier = spec.qualifier; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1635 | void *skip_arg; |
| 1636 | if (qualifier == 'l') |
| 1637 | skip_arg = va_arg(args, long *); |
André Goddard Rosa | 08562cb | 2009-12-14 18:00:58 -0800 | [diff] [blame] | 1638 | else if (TOLOWER(qualifier) == 'z') |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1639 | skip_arg = va_arg(args, size_t *); |
| 1640 | else |
| 1641 | skip_arg = va_arg(args, int *); |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1642 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1643 | } |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1644 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1645 | default: |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1646 | switch (spec.type) { |
| 1647 | |
| 1648 | case FORMAT_TYPE_LONG_LONG: |
| 1649 | save_arg(long long); |
| 1650 | break; |
| 1651 | case FORMAT_TYPE_ULONG: |
| 1652 | case FORMAT_TYPE_LONG: |
| 1653 | save_arg(unsigned long); |
| 1654 | break; |
| 1655 | case FORMAT_TYPE_SIZE_T: |
| 1656 | save_arg(size_t); |
| 1657 | break; |
| 1658 | case FORMAT_TYPE_PTRDIFF: |
| 1659 | save_arg(ptrdiff_t); |
| 1660 | break; |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1661 | case FORMAT_TYPE_UBYTE: |
| 1662 | case FORMAT_TYPE_BYTE: |
| 1663 | save_arg(char); |
| 1664 | break; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1665 | case FORMAT_TYPE_USHORT: |
| 1666 | case FORMAT_TYPE_SHORT: |
| 1667 | save_arg(short); |
| 1668 | break; |
| 1669 | default: |
| 1670 | save_arg(int); |
| 1671 | } |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1672 | } |
| 1673 | } |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1674 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1675 | return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1676 | #undef save_arg |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1677 | } |
| 1678 | EXPORT_SYMBOL_GPL(vbin_printf); |
| 1679 | |
| 1680 | /** |
| 1681 | * bstr_printf - Format a string from binary arguments and place it in a buffer |
| 1682 | * @buf: The buffer to place the result into |
| 1683 | * @size: The size of the buffer, including the trailing null space |
| 1684 | * @fmt: The format string to use |
| 1685 | * @bin_buf: Binary arguments for the format string |
| 1686 | * |
| 1687 | * This function like C99 vsnprintf, but the difference is that vsnprintf gets |
| 1688 | * arguments from stack, and bstr_printf gets arguments from @bin_buf which is |
| 1689 | * a binary buffer that generated by vbin_printf. |
| 1690 | * |
| 1691 | * The format follows C99 vsnprintf, but has some extensions: |
Steven Rostedt | 0efb4d2 | 2009-09-17 09:27:29 -0400 | [diff] [blame] | 1692 | * see vsnprintf comment for details. |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1693 | * |
| 1694 | * The return value is the number of characters which would |
| 1695 | * be generated for the given input, excluding the trailing |
| 1696 | * '\0', as per ISO C99. If you want to have the exact |
| 1697 | * number of characters written into @buf as return value |
| 1698 | * (not including the trailing '\0'), use vscnprintf(). If the |
| 1699 | * return is greater than or equal to @size, the resulting |
| 1700 | * string is truncated. |
| 1701 | */ |
| 1702 | int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf) |
| 1703 | { |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1704 | struct printf_spec spec = {0}; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1705 | char *str, *end; |
| 1706 | const char *args = (const char *)bin_buf; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1707 | |
Marcin Slusarz | 2f30b1f9 | 2009-09-21 17:04:29 -0700 | [diff] [blame] | 1708 | if (WARN_ON_ONCE((int) size < 0)) |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1709 | return 0; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1710 | |
| 1711 | str = buf; |
| 1712 | end = buf + size; |
| 1713 | |
| 1714 | #define get_arg(type) \ |
| 1715 | ({ \ |
| 1716 | typeof(type) value; \ |
| 1717 | if (sizeof(type) == 8) { \ |
| 1718 | args = PTR_ALIGN(args, sizeof(u32)); \ |
| 1719 | *(u32 *)&value = *(u32 *)args; \ |
| 1720 | *((u32 *)&value + 1) = *(u32 *)(args + 4); \ |
| 1721 | } else { \ |
| 1722 | args = PTR_ALIGN(args, sizeof(type)); \ |
| 1723 | value = *(typeof(type) *)args; \ |
| 1724 | } \ |
| 1725 | args += sizeof(type); \ |
| 1726 | value; \ |
| 1727 | }) |
| 1728 | |
| 1729 | /* Make sure end is always >= buf */ |
| 1730 | if (end < buf) { |
| 1731 | end = ((void *)-1); |
| 1732 | size = end - buf; |
| 1733 | } |
| 1734 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1735 | while (*fmt) { |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1736 | const char *old_fmt = fmt; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1737 | int read = format_decode(fmt, &spec); |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1738 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1739 | fmt += read; |
| 1740 | |
| 1741 | switch (spec.type) { |
| 1742 | case FORMAT_TYPE_NONE: { |
| 1743 | int copy = read; |
| 1744 | if (str < end) { |
| 1745 | if (copy > end - str) |
| 1746 | copy = end - str; |
| 1747 | memcpy(str, old_fmt, copy); |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1748 | } |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1749 | str += read; |
| 1750 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1751 | } |
| 1752 | |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1753 | case FORMAT_TYPE_WIDTH: |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1754 | spec.field_width = get_arg(int); |
| 1755 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1756 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1757 | case FORMAT_TYPE_PRECISION: |
| 1758 | spec.precision = get_arg(int); |
| 1759 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1760 | |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1761 | case FORMAT_TYPE_CHAR: { |
| 1762 | char c; |
| 1763 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1764 | if (!(spec.flags & LEFT)) { |
| 1765 | while (--spec.field_width > 0) { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1766 | if (str < end) |
| 1767 | *str = ' '; |
| 1768 | ++str; |
| 1769 | } |
| 1770 | } |
| 1771 | c = (unsigned char) get_arg(char); |
| 1772 | if (str < end) |
| 1773 | *str = c; |
| 1774 | ++str; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1775 | while (--spec.field_width > 0) { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1776 | if (str < end) |
| 1777 | *str = ' '; |
| 1778 | ++str; |
| 1779 | } |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1780 | break; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1781 | } |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1782 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1783 | case FORMAT_TYPE_STR: { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1784 | const char *str_arg = args; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1785 | args += strlen(str_arg) + 1; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1786 | str = string(str, end, (char *)str_arg, spec); |
| 1787 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1788 | } |
| 1789 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1790 | case FORMAT_TYPE_PTR: |
| 1791 | str = pointer(fmt+1, str, end, get_arg(void *), spec); |
| 1792 | while (isalnum(*fmt)) |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1793 | fmt++; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1794 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1795 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1796 | case FORMAT_TYPE_PERCENT_CHAR: |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1797 | case FORMAT_TYPE_INVALID: |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1798 | if (str < end) |
| 1799 | *str = '%'; |
| 1800 | ++str; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1801 | break; |
| 1802 | |
| 1803 | case FORMAT_TYPE_NRCHARS: |
| 1804 | /* skip */ |
| 1805 | break; |
| 1806 | |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1807 | default: { |
| 1808 | unsigned long long num; |
| 1809 | |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1810 | switch (spec.type) { |
| 1811 | |
| 1812 | case FORMAT_TYPE_LONG_LONG: |
| 1813 | num = get_arg(long long); |
| 1814 | break; |
| 1815 | case FORMAT_TYPE_ULONG: |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1816 | case FORMAT_TYPE_LONG: |
| 1817 | num = get_arg(unsigned long); |
| 1818 | break; |
| 1819 | case FORMAT_TYPE_SIZE_T: |
| 1820 | num = get_arg(size_t); |
| 1821 | break; |
| 1822 | case FORMAT_TYPE_PTRDIFF: |
| 1823 | num = get_arg(ptrdiff_t); |
| 1824 | break; |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1825 | case FORMAT_TYPE_UBYTE: |
| 1826 | num = get_arg(unsigned char); |
| 1827 | break; |
| 1828 | case FORMAT_TYPE_BYTE: |
| 1829 | num = get_arg(signed char); |
| 1830 | break; |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1831 | case FORMAT_TYPE_USHORT: |
| 1832 | num = get_arg(unsigned short); |
| 1833 | break; |
| 1834 | case FORMAT_TYPE_SHORT: |
| 1835 | num = get_arg(short); |
| 1836 | break; |
| 1837 | case FORMAT_TYPE_UINT: |
| 1838 | num = get_arg(unsigned int); |
| 1839 | break; |
| 1840 | default: |
| 1841 | num = get_arg(int); |
| 1842 | } |
| 1843 | |
| 1844 | str = number(str, end, num, spec); |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1845 | } /* default: */ |
| 1846 | } /* switch(spec.type) */ |
| 1847 | } /* while(*fmt) */ |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1848 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1849 | if (size > 0) { |
| 1850 | if (str < end) |
| 1851 | *str = '\0'; |
| 1852 | else |
| 1853 | end[-1] = '\0'; |
| 1854 | } |
Frederic Weisbecker | fef20d9 | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1855 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1856 | #undef get_arg |
| 1857 | |
| 1858 | /* the trailing null byte doesn't count towards the total */ |
| 1859 | return str - buf; |
| 1860 | } |
| 1861 | EXPORT_SYMBOL_GPL(bstr_printf); |
| 1862 | |
| 1863 | /** |
| 1864 | * bprintf - Parse a format string and place args' binary value in a buffer |
| 1865 | * @bin_buf: The buffer to place args' binary value |
| 1866 | * @size: The size of the buffer(by words(32bits), not characters) |
| 1867 | * @fmt: The format string to use |
| 1868 | * @...: Arguments for the format string |
| 1869 | * |
| 1870 | * The function returns the number of words(u32) written |
| 1871 | * into @bin_buf. |
| 1872 | */ |
| 1873 | int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) |
| 1874 | { |
| 1875 | va_list args; |
| 1876 | int ret; |
| 1877 | |
| 1878 | va_start(args, fmt); |
| 1879 | ret = vbin_printf(bin_buf, size, fmt, args); |
| 1880 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1881 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1882 | return ret; |
| 1883 | } |
| 1884 | EXPORT_SYMBOL_GPL(bprintf); |
| 1885 | |
| 1886 | #endif /* CONFIG_BINARY_PRINTF */ |
| 1887 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | /** |
| 1889 | * vsscanf - Unformat a buffer into a list of arguments |
| 1890 | * @buf: input buffer |
| 1891 | * @fmt: format of buffer |
| 1892 | * @args: arguments |
| 1893 | */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1894 | int vsscanf(const char *buf, const char *fmt, va_list args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1895 | { |
| 1896 | const char *str = buf; |
| 1897 | char *next; |
| 1898 | char digit; |
| 1899 | int num = 0; |
Joe Perches | ef0658f | 2010-03-06 17:10:14 -0800 | [diff] [blame] | 1900 | u8 qualifier; |
| 1901 | u8 base; |
| 1902 | s16 field_width; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1903 | bool is_sign; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1905 | while (*fmt && *str) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | /* skip any white space in format */ |
| 1907 | /* white space in format matchs any amount of |
| 1908 | * white space, including none, in the input. |
| 1909 | */ |
| 1910 | if (isspace(*fmt)) { |
André Goddard Rosa | e7d2860 | 2009-12-14 18:01:06 -0800 | [diff] [blame] | 1911 | fmt = skip_spaces(++fmt); |
| 1912 | str = skip_spaces(str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1913 | } |
| 1914 | |
| 1915 | /* anything that is not a conversion must match exactly */ |
| 1916 | if (*fmt != '%' && *fmt) { |
| 1917 | if (*fmt++ != *str++) |
| 1918 | break; |
| 1919 | continue; |
| 1920 | } |
| 1921 | |
| 1922 | if (!*fmt) |
| 1923 | break; |
| 1924 | ++fmt; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1925 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1926 | /* skip this conversion. |
| 1927 | * advance both strings to next white space |
| 1928 | */ |
| 1929 | if (*fmt == '*') { |
Andy Spencer | 8fccae2 | 2009-10-01 15:44:27 -0700 | [diff] [blame] | 1930 | while (!isspace(*fmt) && *fmt != '%' && *fmt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | fmt++; |
| 1932 | while (!isspace(*str) && *str) |
| 1933 | str++; |
| 1934 | continue; |
| 1935 | } |
| 1936 | |
| 1937 | /* get field width */ |
| 1938 | field_width = -1; |
| 1939 | if (isdigit(*fmt)) |
| 1940 | field_width = skip_atoi(&fmt); |
| 1941 | |
| 1942 | /* get conversion qualifier */ |
| 1943 | qualifier = -1; |
André Goddard Rosa | 08562cb | 2009-12-14 18:00:58 -0800 | [diff] [blame] | 1944 | if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || |
| 1945 | TOLOWER(*fmt) == 'z') { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | qualifier = *fmt++; |
| 1947 | if (unlikely(qualifier == *fmt)) { |
| 1948 | if (qualifier == 'h') { |
| 1949 | qualifier = 'H'; |
| 1950 | fmt++; |
| 1951 | } else if (qualifier == 'l') { |
| 1952 | qualifier = 'L'; |
| 1953 | fmt++; |
| 1954 | } |
| 1955 | } |
| 1956 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1957 | |
| 1958 | if (!*fmt || !*str) |
| 1959 | break; |
| 1960 | |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1961 | base = 10; |
| 1962 | is_sign = 0; |
| 1963 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1964 | switch (*fmt++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | case 'c': |
| 1966 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1967 | char *s = (char *)va_arg(args, char*); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1968 | if (field_width == -1) |
| 1969 | field_width = 1; |
| 1970 | do { |
| 1971 | *s++ = *str++; |
| 1972 | } while (--field_width > 0 && *str); |
| 1973 | num++; |
| 1974 | } |
| 1975 | continue; |
| 1976 | case 's': |
| 1977 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1978 | char *s = (char *)va_arg(args, char *); |
| 1979 | if (field_width == -1) |
Joe Perches | ef0658f | 2010-03-06 17:10:14 -0800 | [diff] [blame] | 1980 | field_width = SHORT_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1981 | /* first, skip leading white space in buffer */ |
André Goddard Rosa | e7d2860 | 2009-12-14 18:01:06 -0800 | [diff] [blame] | 1982 | str = skip_spaces(str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1983 | |
| 1984 | /* now copy until next white space */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1985 | while (*str && !isspace(*str) && field_width--) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | *s++ = *str++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1987 | *s = '\0'; |
| 1988 | num++; |
| 1989 | } |
| 1990 | continue; |
| 1991 | case 'n': |
| 1992 | /* return number of characters read so far */ |
| 1993 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1994 | int *i = (int *)va_arg(args, int*); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1995 | *i = str - buf; |
| 1996 | } |
| 1997 | continue; |
| 1998 | case 'o': |
| 1999 | base = 8; |
| 2000 | break; |
| 2001 | case 'x': |
| 2002 | case 'X': |
| 2003 | base = 16; |
| 2004 | break; |
| 2005 | case 'i': |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2006 | base = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2007 | case 'd': |
| 2008 | is_sign = 1; |
| 2009 | case 'u': |
| 2010 | break; |
| 2011 | case '%': |
| 2012 | /* looking for '%' in str */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2013 | if (*str++ != '%') |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2014 | return num; |
| 2015 | continue; |
| 2016 | default: |
| 2017 | /* invalid format; stop here */ |
| 2018 | return num; |
| 2019 | } |
| 2020 | |
| 2021 | /* have some sort of integer conversion. |
| 2022 | * first, skip white space in buffer. |
| 2023 | */ |
André Goddard Rosa | e7d2860 | 2009-12-14 18:01:06 -0800 | [diff] [blame] | 2024 | str = skip_spaces(str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2025 | |
| 2026 | digit = *str; |
| 2027 | if (is_sign && digit == '-') |
| 2028 | digit = *(str + 1); |
| 2029 | |
| 2030 | if (!digit |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2031 | || (base == 16 && !isxdigit(digit)) |
| 2032 | || (base == 10 && !isdigit(digit)) |
| 2033 | || (base == 8 && (!isdigit(digit) || digit > '7')) |
| 2034 | || (base == 0 && !isdigit(digit))) |
| 2035 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2037 | switch (qualifier) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2038 | case 'H': /* that's 'hh' in format */ |
| 2039 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2040 | signed char *s = (signed char *)va_arg(args, signed char *); |
| 2041 | *s = (signed char)simple_strtol(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | } else { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2043 | unsigned char *s = (unsigned char *)va_arg(args, unsigned char *); |
| 2044 | *s = (unsigned char)simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2045 | } |
| 2046 | break; |
| 2047 | case 'h': |
| 2048 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2049 | short *s = (short *)va_arg(args, short *); |
| 2050 | *s = (short)simple_strtol(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2051 | } else { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2052 | unsigned short *s = (unsigned short *)va_arg(args, unsigned short *); |
| 2053 | *s = (unsigned short)simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2054 | } |
| 2055 | break; |
| 2056 | case 'l': |
| 2057 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2058 | long *l = (long *)va_arg(args, long *); |
| 2059 | *l = simple_strtol(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2060 | } else { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2061 | unsigned long *l = (unsigned long *)va_arg(args, unsigned long *); |
| 2062 | *l = simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2063 | } |
| 2064 | break; |
| 2065 | case 'L': |
| 2066 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2067 | long long *l = (long long *)va_arg(args, long long *); |
| 2068 | *l = simple_strtoll(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2069 | } else { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2070 | unsigned long long *l = (unsigned long long *)va_arg(args, unsigned long long *); |
| 2071 | *l = simple_strtoull(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2072 | } |
| 2073 | break; |
| 2074 | case 'Z': |
| 2075 | case 'z': |
| 2076 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2077 | size_t *s = (size_t *)va_arg(args, size_t *); |
| 2078 | *s = (size_t)simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | } |
| 2080 | break; |
| 2081 | default: |
| 2082 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2083 | int *i = (int *)va_arg(args, int *); |
| 2084 | *i = (int)simple_strtol(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2085 | } else { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2086 | unsigned int *i = (unsigned int *)va_arg(args, unsigned int*); |
| 2087 | *i = (unsigned int)simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | } |
| 2089 | break; |
| 2090 | } |
| 2091 | num++; |
| 2092 | |
| 2093 | if (!next) |
| 2094 | break; |
| 2095 | str = next; |
| 2096 | } |
Johannes Berg | c6b40d1 | 2007-05-08 00:27:20 -0700 | [diff] [blame] | 2097 | |
| 2098 | /* |
| 2099 | * Now we've come all the way through so either the input string or the |
| 2100 | * format ended. In the former case, there can be a %n at the current |
| 2101 | * position in the format that needs to be filled. |
| 2102 | */ |
| 2103 | if (*fmt == '%' && *(fmt + 1) == 'n') { |
| 2104 | int *p = (int *)va_arg(args, int *); |
| 2105 | *p = str - buf; |
| 2106 | } |
| 2107 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2108 | return num; |
| 2109 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2110 | EXPORT_SYMBOL(vsscanf); |
| 2111 | |
| 2112 | /** |
| 2113 | * sscanf - Unformat a buffer into a list of arguments |
| 2114 | * @buf: input buffer |
| 2115 | * @fmt: formatting of buffer |
| 2116 | * @...: resulting arguments |
| 2117 | */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2118 | int sscanf(const char *buf, const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | { |
| 2120 | va_list args; |
| 2121 | int i; |
| 2122 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2123 | va_start(args, fmt); |
| 2124 | i = vsscanf(buf, fmt, args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2125 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2127 | return i; |
| 2128 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2129 | EXPORT_SYMBOL(sscanf); |