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 | } |
Hans Verkuil | 98d5ce0 | 2010-04-23 13:18:04 -0400 | [diff] [blame] | 121 | EXPORT_SYMBOL(simple_strtoll); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | |
Yi Yang | 06b2a76 | 2008-02-08 04:21:57 -0800 | [diff] [blame] | 123 | /** |
| 124 | * strict_strtoul - convert a string to an unsigned long strictly |
| 125 | * @cp: The string to be converted |
| 126 | * @base: The number base to use |
| 127 | * @res: The converted result value |
| 128 | * |
| 129 | * strict_strtoul converts a string to an unsigned long only if the |
| 130 | * string is really an unsigned long string, any string containing |
| 131 | * any invalid char at the tail will be rejected and -EINVAL is returned, |
| 132 | * only a newline char at the tail is acceptible because people generally |
| 133 | * change a module parameter in the following way: |
| 134 | * |
| 135 | * echo 1024 > /sys/module/e1000/parameters/copybreak |
| 136 | * |
| 137 | * echo will append a newline to the tail. |
| 138 | * |
| 139 | * It returns 0 if conversion is successful and *res is set to the converted |
| 140 | * value, otherwise it returns -EINVAL and *res is set to 0. |
| 141 | * |
| 142 | * simple_strtoul just ignores the successive invalid characters and |
| 143 | * return the converted value of prefix part of the string. |
| 144 | */ |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 145 | int strict_strtoul(const char *cp, unsigned int base, unsigned long *res) |
| 146 | { |
| 147 | char *tail; |
| 148 | unsigned long val; |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 149 | |
| 150 | *res = 0; |
Michal Nazarewicz | 559b140 | 2010-08-09 17:20:54 -0700 | [diff] [blame] | 151 | if (!*cp) |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 152 | return -EINVAL; |
| 153 | |
| 154 | val = simple_strtoul(cp, &tail, base); |
Pavel Machek | e899aa8 | 2009-01-06 14:40:53 -0800 | [diff] [blame] | 155 | if (tail == cp) |
| 156 | return -EINVAL; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 157 | |
Michal Nazarewicz | 559b140 | 2010-08-09 17:20:54 -0700 | [diff] [blame] | 158 | if ((tail[0] == '\0') || (tail[0] == '\n' && tail[1] == '\0')) { |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 159 | *res = val; |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | return -EINVAL; |
| 164 | } |
| 165 | EXPORT_SYMBOL(strict_strtoul); |
Yi Yang | 06b2a76 | 2008-02-08 04:21:57 -0800 | [diff] [blame] | 166 | |
| 167 | /** |
| 168 | * strict_strtol - convert a string to a long strictly |
| 169 | * @cp: The string to be converted |
| 170 | * @base: The number base to use |
| 171 | * @res: The converted result value |
| 172 | * |
| 173 | * strict_strtol is similiar to strict_strtoul, but it allows the first |
| 174 | * character of a string is '-'. |
| 175 | * |
| 176 | * It returns 0 if conversion is successful and *res is set to the converted |
| 177 | * value, otherwise it returns -EINVAL and *res is set to 0. |
| 178 | */ |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 179 | int strict_strtol(const char *cp, unsigned int base, long *res) |
| 180 | { |
| 181 | int ret; |
| 182 | if (*cp == '-') { |
| 183 | ret = strict_strtoul(cp + 1, base, (unsigned long *)res); |
| 184 | if (!ret) |
| 185 | *res = -(*res); |
| 186 | } else { |
| 187 | ret = strict_strtoul(cp, base, (unsigned long *)res); |
| 188 | } |
| 189 | |
| 190 | return ret; |
| 191 | } |
| 192 | EXPORT_SYMBOL(strict_strtol); |
Yi Yang | 06b2a76 | 2008-02-08 04:21:57 -0800 | [diff] [blame] | 193 | |
| 194 | /** |
| 195 | * strict_strtoull - convert a string to an unsigned long long strictly |
| 196 | * @cp: The string to be converted |
| 197 | * @base: The number base to use |
| 198 | * @res: The converted result value |
| 199 | * |
| 200 | * strict_strtoull converts a string to an unsigned long long only if the |
| 201 | * string is really an unsigned long long string, any string containing |
| 202 | * any invalid char at the tail will be rejected and -EINVAL is returned, |
| 203 | * only a newline char at the tail is acceptible because people generally |
| 204 | * change a module parameter in the following way: |
| 205 | * |
| 206 | * echo 1024 > /sys/module/e1000/parameters/copybreak |
| 207 | * |
| 208 | * echo will append a newline to the tail of the string. |
| 209 | * |
| 210 | * It returns 0 if conversion is successful and *res is set to the converted |
| 211 | * value, otherwise it returns -EINVAL and *res is set to 0. |
| 212 | * |
| 213 | * simple_strtoull just ignores the successive invalid characters and |
| 214 | * return the converted value of prefix part of the string. |
| 215 | */ |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 216 | int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res) |
| 217 | { |
| 218 | char *tail; |
| 219 | unsigned long long val; |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 220 | |
| 221 | *res = 0; |
Michal Nazarewicz | 559b140 | 2010-08-09 17:20:54 -0700 | [diff] [blame] | 222 | if (!*cp) |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 223 | return -EINVAL; |
| 224 | |
| 225 | val = simple_strtoull(cp, &tail, base); |
Pavel Machek | e899aa8 | 2009-01-06 14:40:53 -0800 | [diff] [blame] | 226 | if (tail == cp) |
| 227 | return -EINVAL; |
Michal Nazarewicz | 559b140 | 2010-08-09 17:20:54 -0700 | [diff] [blame] | 228 | if ((tail[0] == '\0') || (tail[0] == '\n' && tail[1] == '\0')) { |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 229 | *res = val; |
| 230 | return 0; |
| 231 | } |
| 232 | |
| 233 | return -EINVAL; |
| 234 | } |
| 235 | EXPORT_SYMBOL(strict_strtoull); |
Yi Yang | 06b2a76 | 2008-02-08 04:21:57 -0800 | [diff] [blame] | 236 | |
| 237 | /** |
| 238 | * strict_strtoll - convert a string to a long long strictly |
| 239 | * @cp: The string to be converted |
| 240 | * @base: The number base to use |
| 241 | * @res: The converted result value |
| 242 | * |
| 243 | * strict_strtoll is similiar to strict_strtoull, but it allows the first |
| 244 | * character of a string is '-'. |
| 245 | * |
| 246 | * It returns 0 if conversion is successful and *res is set to the converted |
| 247 | * value, otherwise it returns -EINVAL and *res is set to 0. |
| 248 | */ |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 249 | int strict_strtoll(const char *cp, unsigned int base, long long *res) |
| 250 | { |
| 251 | int ret; |
| 252 | if (*cp == '-') { |
| 253 | ret = strict_strtoull(cp + 1, base, (unsigned long long *)res); |
| 254 | if (!ret) |
| 255 | *res = -(*res); |
| 256 | } else { |
| 257 | ret = strict_strtoull(cp, base, (unsigned long long *)res); |
| 258 | } |
Yi Yang | 06b2a76 | 2008-02-08 04:21:57 -0800 | [diff] [blame] | 259 | |
Harvey Harrison | 9d85db2 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 260 | return ret; |
| 261 | } |
Yi Yang | 06b2a76 | 2008-02-08 04:21:57 -0800 | [diff] [blame] | 262 | EXPORT_SYMBOL(strict_strtoll); |
Yi Yang | 06b2a76 | 2008-02-08 04:21:57 -0800 | [diff] [blame] | 263 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 264 | static noinline_for_stack |
| 265 | int skip_atoi(const char **s) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 267 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | |
| 269 | while (isdigit(**s)) |
| 270 | i = i*10 + *((*s)++) - '0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 271 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | return i; |
| 273 | } |
| 274 | |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 275 | /* Decimal conversion is by far the most typical, and is used |
| 276 | * for /proc and /sys data. This directly impacts e.g. top performance |
| 277 | * with many processes running. We optimize it for speed |
| 278 | * using code from |
| 279 | * http://www.cs.uiowa.edu/~jones/bcd/decimal.html |
| 280 | * (with permission from the author, Douglas W. Jones). */ |
| 281 | |
| 282 | /* Formats correctly any integer in [0,99999]. |
| 283 | * Outputs from one to five digits depending on input. |
| 284 | * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 285 | static noinline_for_stack |
| 286 | char *put_dec_trunc(char *buf, unsigned q) |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 287 | { |
| 288 | unsigned d3, d2, d1, d0; |
| 289 | d1 = (q>>4) & 0xf; |
| 290 | d2 = (q>>8) & 0xf; |
| 291 | d3 = (q>>12); |
| 292 | |
| 293 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); |
| 294 | q = (d0 * 0xcd) >> 11; |
| 295 | d0 = d0 - 10*q; |
| 296 | *buf++ = d0 + '0'; /* least significant digit */ |
| 297 | d1 = q + 9*d3 + 5*d2 + d1; |
| 298 | if (d1 != 0) { |
| 299 | q = (d1 * 0xcd) >> 11; |
| 300 | d1 = d1 - 10*q; |
| 301 | *buf++ = d1 + '0'; /* next digit */ |
| 302 | |
| 303 | d2 = q + 2*d2; |
| 304 | if ((d2 != 0) || (d3 != 0)) { |
| 305 | q = (d2 * 0xd) >> 7; |
| 306 | d2 = d2 - 10*q; |
| 307 | *buf++ = d2 + '0'; /* next digit */ |
| 308 | |
| 309 | d3 = q + 4*d3; |
| 310 | if (d3 != 0) { |
| 311 | q = (d3 * 0xcd) >> 11; |
| 312 | d3 = d3 - 10*q; |
| 313 | *buf++ = d3 + '0'; /* next digit */ |
| 314 | if (q != 0) |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 315 | *buf++ = q + '0'; /* most sign. digit */ |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 316 | } |
| 317 | } |
| 318 | } |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 319 | |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 320 | return buf; |
| 321 | } |
| 322 | /* Same with if's removed. Always emits five digits */ |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 323 | static noinline_for_stack |
| 324 | char *put_dec_full(char *buf, unsigned q) |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 325 | { |
| 326 | /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ |
| 327 | /* but anyway, gcc produces better code with full-sized ints */ |
| 328 | unsigned d3, d2, d1, d0; |
| 329 | d1 = (q>>4) & 0xf; |
| 330 | d2 = (q>>8) & 0xf; |
| 331 | d3 = (q>>12); |
| 332 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 333 | /* |
| 334 | * Possible ways to approx. divide by 10 |
| 335 | * gcc -O2 replaces multiply with shifts and adds |
| 336 | * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) |
| 337 | * (x * 0x67) >> 10: 1100111 |
| 338 | * (x * 0x34) >> 9: 110100 - same |
| 339 | * (x * 0x1a) >> 8: 11010 - same |
| 340 | * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) |
| 341 | */ |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 342 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); |
| 343 | q = (d0 * 0xcd) >> 11; |
| 344 | d0 = d0 - 10*q; |
| 345 | *buf++ = d0 + '0'; |
| 346 | d1 = q + 9*d3 + 5*d2 + d1; |
| 347 | q = (d1 * 0xcd) >> 11; |
| 348 | d1 = d1 - 10*q; |
| 349 | *buf++ = d1 + '0'; |
| 350 | |
| 351 | d2 = q + 2*d2; |
| 352 | q = (d2 * 0xd) >> 7; |
| 353 | d2 = d2 - 10*q; |
| 354 | *buf++ = d2 + '0'; |
| 355 | |
| 356 | d3 = q + 4*d3; |
| 357 | q = (d3 * 0xcd) >> 11; /* - shorter code */ |
| 358 | /* q = (d3 * 0x67) >> 10; - would also work */ |
| 359 | d3 = d3 - 10*q; |
| 360 | *buf++ = d3 + '0'; |
| 361 | *buf++ = q + '0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 362 | |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 363 | return buf; |
| 364 | } |
| 365 | /* No inlining helps gcc to use registers better */ |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 366 | static noinline_for_stack |
| 367 | char *put_dec(char *buf, unsigned long long num) |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 368 | { |
| 369 | while (1) { |
| 370 | unsigned rem; |
| 371 | if (num < 100000) |
| 372 | return put_dec_trunc(buf, num); |
| 373 | rem = do_div(num, 100000); |
| 374 | buf = put_dec_full(buf, rem); |
| 375 | } |
| 376 | } |
| 377 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | #define ZEROPAD 1 /* pad with zero */ |
| 379 | #define SIGN 2 /* unsigned/signed long */ |
| 380 | #define PLUS 4 /* show plus */ |
| 381 | #define SPACE 8 /* space if plus */ |
| 382 | #define LEFT 16 /* left justified */ |
Bjorn Helgaas | b89dc5d | 2010-03-05 10:47:31 -0700 | [diff] [blame] | 383 | #define SMALL 32 /* use lowercase in hex (must be 32 == 0x20) */ |
| 384 | #define SPECIAL 64 /* prefix hex with "0x", octal with "0" */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 386 | enum format_type { |
| 387 | FORMAT_TYPE_NONE, /* Just a string part */ |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 388 | FORMAT_TYPE_WIDTH, |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 389 | FORMAT_TYPE_PRECISION, |
| 390 | FORMAT_TYPE_CHAR, |
| 391 | FORMAT_TYPE_STR, |
| 392 | FORMAT_TYPE_PTR, |
| 393 | FORMAT_TYPE_PERCENT_CHAR, |
| 394 | FORMAT_TYPE_INVALID, |
| 395 | FORMAT_TYPE_LONG_LONG, |
| 396 | FORMAT_TYPE_ULONG, |
| 397 | FORMAT_TYPE_LONG, |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 398 | FORMAT_TYPE_UBYTE, |
| 399 | FORMAT_TYPE_BYTE, |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 400 | FORMAT_TYPE_USHORT, |
| 401 | FORMAT_TYPE_SHORT, |
| 402 | FORMAT_TYPE_UINT, |
| 403 | FORMAT_TYPE_INT, |
| 404 | FORMAT_TYPE_NRCHARS, |
| 405 | FORMAT_TYPE_SIZE_T, |
| 406 | FORMAT_TYPE_PTRDIFF |
| 407 | }; |
| 408 | |
| 409 | struct printf_spec { |
Joe Perches | 4e310fd | 2010-04-14 09:27:40 -0700 | [diff] [blame] | 410 | u8 type; /* format_type enum */ |
Joe Perches | ef0658f | 2010-03-06 17:10:14 -0800 | [diff] [blame] | 411 | u8 flags; /* flags to number() */ |
Joe Perches | 4e310fd | 2010-04-14 09:27:40 -0700 | [diff] [blame] | 412 | u8 base; /* number base, 8, 10 or 16 only */ |
| 413 | u8 qualifier; /* number qualifier, one of 'hHlLtzZ' */ |
| 414 | s16 field_width; /* width of output field */ |
| 415 | s16 precision; /* # of digits/chars */ |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 416 | }; |
| 417 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 418 | static noinline_for_stack |
| 419 | 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 | fef20d9c | 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 | fef20d9c | 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 | fef20d9c | 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 | fef20d9c | 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 | fef20d9c | 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 | fef20d9c | 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 | fef20d9c | 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 | fef20d9c | 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 | fef20d9c | 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 | fef20d9c | 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 | fef20d9c | 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 | fef20d9c | 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 | fef20d9c | 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 | fef20d9c | 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 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 539 | static noinline_for_stack |
| 540 | 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] | 541 | { |
| 542 | int len, i; |
| 543 | |
| 544 | if ((unsigned long)s < PAGE_SIZE) |
André Goddard Rosa | 0f4f81d | 2009-12-14 18:00:55 -0800 | [diff] [blame] | 545 | s = "(null)"; |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 546 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 547 | len = strnlen(s, spec.precision); |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 548 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 549 | if (!(spec.flags & LEFT)) { |
| 550 | while (len < spec.field_width--) { |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 551 | if (buf < end) |
| 552 | *buf = ' '; |
| 553 | ++buf; |
| 554 | } |
| 555 | } |
| 556 | for (i = 0; i < len; ++i) { |
| 557 | if (buf < end) |
| 558 | *buf = *s; |
| 559 | ++buf; ++s; |
| 560 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 561 | while (len < spec.field_width--) { |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 562 | if (buf < end) |
| 563 | *buf = ' '; |
| 564 | ++buf; |
| 565 | } |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 566 | |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 567 | return buf; |
| 568 | } |
| 569 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 570 | static noinline_for_stack |
| 571 | char *symbol_string(char *buf, char *end, void *ptr, |
| 572 | struct printf_spec spec, char ext) |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 573 | { |
| 574 | unsigned long value = (unsigned long) ptr; |
| 575 | #ifdef CONFIG_KALLSYMS |
| 576 | char sym[KSYM_SYMBOL_LEN]; |
Steven Rostedt | 91adcd2 | 2009-09-16 20:03:06 -0400 | [diff] [blame] | 577 | if (ext != 'f' && ext != 's') |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 578 | sprint_symbol(sym, value); |
| 579 | else |
| 580 | kallsyms_lookup(value, NULL, NULL, NULL, sym); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 581 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 582 | return string(buf, end, sym, spec); |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 583 | #else |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 584 | spec.field_width = 2 * sizeof(void *); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 585 | spec.flags |= SPECIAL | SMALL | ZEROPAD; |
| 586 | spec.base = 16; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 587 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 588 | return number(buf, end, value, spec); |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 589 | #endif |
| 590 | } |
| 591 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 592 | static noinline_for_stack |
| 593 | char *resource_string(char *buf, char *end, struct resource *res, |
| 594 | struct printf_spec spec, const char *fmt) |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 595 | { |
| 596 | #ifndef IO_RSRC_PRINTK_SIZE |
Bjorn Helgaas | 2840537 | 2009-10-06 15:33:29 -0600 | [diff] [blame] | 597 | #define IO_RSRC_PRINTK_SIZE 6 |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 598 | #endif |
| 599 | |
| 600 | #ifndef MEM_RSRC_PRINTK_SIZE |
Bjorn Helgaas | 2840537 | 2009-10-06 15:33:29 -0600 | [diff] [blame] | 601 | #define MEM_RSRC_PRINTK_SIZE 10 |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 602 | #endif |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 603 | static const struct printf_spec io_spec = { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 604 | .base = 16, |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 605 | .field_width = IO_RSRC_PRINTK_SIZE, |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 606 | .precision = -1, |
| 607 | .flags = SPECIAL | SMALL | ZEROPAD, |
| 608 | }; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 609 | static const struct printf_spec mem_spec = { |
| 610 | .base = 16, |
| 611 | .field_width = MEM_RSRC_PRINTK_SIZE, |
| 612 | .precision = -1, |
| 613 | .flags = SPECIAL | SMALL | ZEROPAD, |
| 614 | }; |
Bjorn Helgaas | 0f4050c | 2010-03-05 10:47:42 -0700 | [diff] [blame] | 615 | static const struct printf_spec bus_spec = { |
| 616 | .base = 16, |
| 617 | .field_width = 2, |
| 618 | .precision = -1, |
| 619 | .flags = SMALL | ZEROPAD, |
| 620 | }; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 621 | static const struct printf_spec dec_spec = { |
Bjorn Helgaas | c91d337 | 2009-10-06 15:33:34 -0600 | [diff] [blame] | 622 | .base = 10, |
| 623 | .precision = -1, |
| 624 | .flags = 0, |
| 625 | }; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 626 | static const struct printf_spec str_spec = { |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 627 | .field_width = -1, |
| 628 | .precision = 10, |
| 629 | .flags = LEFT, |
| 630 | }; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 631 | static const struct printf_spec flag_spec = { |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 632 | .base = 16, |
| 633 | .precision = -1, |
| 634 | .flags = SPECIAL | SMALL, |
| 635 | }; |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 636 | |
| 637 | /* 32-bit res (sizeof==4): 10 chars in dec, 10 in hex ("0x" + 8) |
| 638 | * 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */ |
| 639 | #define RSRC_BUF_SIZE ((2 * sizeof(resource_size_t)) + 4) |
| 640 | #define FLAG_BUF_SIZE (2 * sizeof(res->flags)) |
Bjorn Helgaas | 9d7cca0 | 2010-03-05 10:47:47 -0700 | [diff] [blame] | 641 | #define DECODED_BUF_SIZE sizeof("[mem - 64bit pref window disabled]") |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 642 | #define RAW_BUF_SIZE sizeof("[mem - flags 0x]") |
| 643 | char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE, |
| 644 | 2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)]; |
| 645 | |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 646 | char *p = sym, *pend = sym + sizeof(sym); |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 647 | int decode = (fmt[0] == 'R') ? 1 : 0; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 648 | const struct printf_spec *specp; |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 649 | |
| 650 | *p++ = '['; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 651 | if (res->flags & IORESOURCE_IO) { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 652 | p = string(p, pend, "io ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 653 | specp = &io_spec; |
| 654 | } else if (res->flags & IORESOURCE_MEM) { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 655 | p = string(p, pend, "mem ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 656 | specp = &mem_spec; |
| 657 | } else if (res->flags & IORESOURCE_IRQ) { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 658 | p = string(p, pend, "irq ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 659 | specp = &dec_spec; |
| 660 | } else if (res->flags & IORESOURCE_DMA) { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 661 | p = string(p, pend, "dma ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 662 | specp = &dec_spec; |
Bjorn Helgaas | 0f4050c | 2010-03-05 10:47:42 -0700 | [diff] [blame] | 663 | } else if (res->flags & IORESOURCE_BUS) { |
| 664 | p = string(p, pend, "bus ", str_spec); |
| 665 | specp = &bus_spec; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 666 | } else { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 667 | p = string(p, pend, "??? ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 668 | specp = &mem_spec; |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 669 | decode = 0; |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 670 | } |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 671 | p = number(p, pend, res->start, *specp); |
Bjorn Helgaas | c91d337 | 2009-10-06 15:33:34 -0600 | [diff] [blame] | 672 | if (res->start != res->end) { |
| 673 | *p++ = '-'; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 674 | p = number(p, pend, res->end, *specp); |
Bjorn Helgaas | c91d337 | 2009-10-06 15:33:34 -0600 | [diff] [blame] | 675 | } |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 676 | if (decode) { |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 677 | if (res->flags & IORESOURCE_MEM_64) |
| 678 | p = string(p, pend, " 64bit", str_spec); |
| 679 | if (res->flags & IORESOURCE_PREFETCH) |
| 680 | p = string(p, pend, " pref", str_spec); |
Bjorn Helgaas | 9d7cca0 | 2010-03-05 10:47:47 -0700 | [diff] [blame] | 681 | if (res->flags & IORESOURCE_WINDOW) |
| 682 | p = string(p, pend, " window", str_spec); |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 683 | if (res->flags & IORESOURCE_DISABLED) |
| 684 | p = string(p, pend, " disabled", str_spec); |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 685 | } else { |
| 686 | p = string(p, pend, " flags ", str_spec); |
| 687 | p = number(p, pend, res->flags, flag_spec); |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 688 | } |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 689 | *p++ = ']'; |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 690 | *p = '\0'; |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 691 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 692 | return string(buf, end, sym, spec); |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 693 | } |
| 694 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 695 | static noinline_for_stack |
| 696 | char *mac_address_string(char *buf, char *end, u8 *addr, |
| 697 | struct printf_spec spec, const char *fmt) |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 698 | { |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 699 | char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")]; |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 700 | char *p = mac_addr; |
| 701 | int i; |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 702 | char separator; |
| 703 | |
| 704 | if (fmt[1] == 'F') { /* FDDI canonical format */ |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 705 | separator = '-'; |
| 706 | } else { |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 707 | separator = ':'; |
| 708 | } |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 709 | |
| 710 | for (i = 0; i < 6; i++) { |
Joe Perches | c8e0006 | 2010-01-11 00:44:14 -0800 | [diff] [blame] | 711 | p = pack_hex_byte(p, addr[i]); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 712 | if (fmt[0] == 'M' && i != 5) |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 713 | *p++ = separator; |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 714 | } |
| 715 | *p = '\0'; |
| 716 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 717 | return string(buf, end, mac_addr, spec); |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 718 | } |
| 719 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 720 | static noinline_for_stack |
| 721 | char *ip4_string(char *p, const u8 *addr, const char *fmt) |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 722 | { |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 723 | int i; |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 724 | bool leading_zeros = (fmt[0] == 'i'); |
| 725 | int index; |
| 726 | int step; |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 727 | |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 728 | switch (fmt[2]) { |
| 729 | case 'h': |
| 730 | #ifdef __BIG_ENDIAN |
| 731 | index = 0; |
| 732 | step = 1; |
| 733 | #else |
| 734 | index = 3; |
| 735 | step = -1; |
| 736 | #endif |
| 737 | break; |
| 738 | case 'l': |
| 739 | index = 3; |
| 740 | step = -1; |
| 741 | break; |
| 742 | case 'n': |
| 743 | case 'b': |
| 744 | default: |
| 745 | index = 0; |
| 746 | step = 1; |
| 747 | break; |
| 748 | } |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 749 | for (i = 0; i < 4; i++) { |
| 750 | char temp[3]; /* hold each IP quad in reverse order */ |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 751 | int digits = put_dec_trunc(temp, addr[index]) - temp; |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 752 | if (leading_zeros) { |
| 753 | if (digits < 3) |
| 754 | *p++ = '0'; |
| 755 | if (digits < 2) |
| 756 | *p++ = '0'; |
| 757 | } |
| 758 | /* reverse the digits in the quad */ |
| 759 | while (digits--) |
| 760 | *p++ = temp[digits]; |
| 761 | if (i < 3) |
| 762 | *p++ = '.'; |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 763 | index += step; |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 764 | } |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 765 | *p = '\0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 766 | |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 767 | return p; |
| 768 | } |
| 769 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 770 | static noinline_for_stack |
| 771 | char *ip6_compressed_string(char *p, const char *addr) |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 772 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 773 | int i, j, range; |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 774 | unsigned char zerolength[8]; |
| 775 | int longest = 1; |
| 776 | int colonpos = -1; |
| 777 | u16 word; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 778 | u8 hi, lo; |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 779 | bool needcolon = false; |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 780 | bool useIPv4; |
| 781 | struct in6_addr in6; |
| 782 | |
| 783 | memcpy(&in6, addr, sizeof(struct in6_addr)); |
| 784 | |
| 785 | useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 786 | |
| 787 | memset(zerolength, 0, sizeof(zerolength)); |
| 788 | |
| 789 | if (useIPv4) |
| 790 | range = 6; |
| 791 | else |
| 792 | range = 8; |
| 793 | |
| 794 | /* find position of longest 0 run */ |
| 795 | for (i = 0; i < range; i++) { |
| 796 | for (j = i; j < range; j++) { |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 797 | if (in6.s6_addr16[j] != 0) |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 798 | break; |
| 799 | zerolength[i]++; |
| 800 | } |
| 801 | } |
| 802 | for (i = 0; i < range; i++) { |
| 803 | if (zerolength[i] > longest) { |
| 804 | longest = zerolength[i]; |
| 805 | colonpos = i; |
| 806 | } |
| 807 | } |
| 808 | |
| 809 | /* emit address */ |
| 810 | for (i = 0; i < range; i++) { |
| 811 | if (i == colonpos) { |
| 812 | if (needcolon || i == 0) |
| 813 | *p++ = ':'; |
| 814 | *p++ = ':'; |
| 815 | needcolon = false; |
| 816 | i += longest - 1; |
| 817 | continue; |
| 818 | } |
| 819 | if (needcolon) { |
| 820 | *p++ = ':'; |
| 821 | needcolon = false; |
| 822 | } |
| 823 | /* hex u16 without leading 0s */ |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 824 | word = ntohs(in6.s6_addr16[i]); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 825 | hi = word >> 8; |
| 826 | lo = word & 0xff; |
| 827 | if (hi) { |
| 828 | if (hi > 0x0f) |
| 829 | p = pack_hex_byte(p, hi); |
| 830 | else |
| 831 | *p++ = hex_asc_lo(hi); |
André Goddard Rosa | b5ff992 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 832 | p = pack_hex_byte(p, lo); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 833 | } |
André Goddard Rosa | b5ff992 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 834 | else if (lo > 0x0f) |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 835 | p = pack_hex_byte(p, lo); |
| 836 | else |
| 837 | *p++ = hex_asc_lo(lo); |
| 838 | needcolon = true; |
| 839 | } |
| 840 | |
| 841 | if (useIPv4) { |
| 842 | if (needcolon) |
| 843 | *p++ = ':'; |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 844 | p = ip4_string(p, &in6.s6_addr[12], "I4"); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 845 | } |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 846 | *p = '\0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 847 | |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 848 | return p; |
| 849 | } |
| 850 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 851 | static noinline_for_stack |
| 852 | char *ip6_string(char *p, const char *addr, const char *fmt) |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 853 | { |
| 854 | int i; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 855 | |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 856 | for (i = 0; i < 8; i++) { |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 857 | p = pack_hex_byte(p, *addr++); |
| 858 | p = pack_hex_byte(p, *addr++); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 859 | if (fmt[0] == 'I' && i != 7) |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 860 | *p++ = ':'; |
| 861 | } |
| 862 | *p = '\0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 863 | |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 864 | return p; |
| 865 | } |
| 866 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 867 | static noinline_for_stack |
| 868 | char *ip6_addr_string(char *buf, char *end, const u8 *addr, |
| 869 | struct printf_spec spec, const char *fmt) |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 870 | { |
| 871 | char ip6_addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")]; |
| 872 | |
| 873 | if (fmt[0] == 'I' && fmt[2] == 'c') |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 874 | ip6_compressed_string(ip6_addr, addr); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 875 | else |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 876 | ip6_string(ip6_addr, addr, fmt); |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 877 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 878 | return string(buf, end, ip6_addr, spec); |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 879 | } |
| 880 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 881 | static noinline_for_stack |
| 882 | char *ip4_addr_string(char *buf, char *end, const u8 *addr, |
| 883 | struct printf_spec spec, const char *fmt) |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 884 | { |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 885 | char ip4_addr[sizeof("255.255.255.255")]; |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 886 | |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 887 | ip4_string(ip4_addr, addr, fmt); |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 888 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 889 | return string(buf, end, ip4_addr, spec); |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 890 | } |
| 891 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 892 | static noinline_for_stack |
| 893 | char *uuid_string(char *buf, char *end, const u8 *addr, |
| 894 | struct printf_spec spec, const char *fmt) |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 895 | { |
| 896 | char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")]; |
| 897 | char *p = uuid; |
| 898 | int i; |
| 899 | static const u8 be[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; |
| 900 | static const u8 le[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15}; |
| 901 | const u8 *index = be; |
| 902 | bool uc = false; |
| 903 | |
| 904 | switch (*(++fmt)) { |
| 905 | case 'L': |
| 906 | uc = true; /* fall-through */ |
| 907 | case 'l': |
| 908 | index = le; |
| 909 | break; |
| 910 | case 'B': |
| 911 | uc = true; |
| 912 | break; |
| 913 | } |
| 914 | |
| 915 | for (i = 0; i < 16; i++) { |
| 916 | p = pack_hex_byte(p, addr[index[i]]); |
| 917 | switch (i) { |
| 918 | case 3: |
| 919 | case 5: |
| 920 | case 7: |
| 921 | case 9: |
| 922 | *p++ = '-'; |
| 923 | break; |
| 924 | } |
| 925 | } |
| 926 | |
| 927 | *p = 0; |
| 928 | |
| 929 | if (uc) { |
| 930 | p = uuid; |
| 931 | do { |
| 932 | *p = toupper(*p); |
| 933 | } while (*(++p)); |
| 934 | } |
| 935 | |
| 936 | return string(buf, end, uuid, spec); |
| 937 | } |
| 938 | |
Linus Torvalds | 4d8a743 | 2008-07-06 16:24:57 -0700 | [diff] [blame] | 939 | /* |
| 940 | * Show a '%p' thing. A kernel extension is that the '%p' is followed |
| 941 | * by an extra set of alphanumeric characters that are extended format |
| 942 | * specifiers. |
| 943 | * |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 944 | * Right now we handle: |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 945 | * |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 946 | * - 'F' For symbolic function descriptor pointers with offset |
| 947 | * - 'f' For simple symbolic function names without offset |
Steven Rostedt | 0efb4d2 | 2009-09-17 09:27:29 -0400 | [diff] [blame] | 948 | * - 'S' For symbolic direct pointers with offset |
| 949 | * - 's' For symbolic direct pointers without offset |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 950 | * - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref] |
| 951 | * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201] |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 952 | * - 'M' For a 6-byte MAC address, it prints the address in the |
| 953 | * usual colon-separated hex notation |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 954 | * - '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] | 955 | * - 'MF' For a 6-byte MAC FDDI address, it prints the address |
Joe Perches | c8e0006 | 2010-01-11 00:44:14 -0800 | [diff] [blame] | 956 | * with a dash-separated hex notation |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 957 | * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way |
| 958 | * IPv4 uses dot-separated decimal without leading 0's (1.2.3.4) |
| 959 | * IPv6 uses colon separated network-order 16 bit hex with leading 0's |
| 960 | * - 'i' [46] for 'raw' IPv4/IPv6 addresses |
| 961 | * IPv6 omits the colons (01020304...0f) |
| 962 | * 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] | 963 | * - '[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] | 964 | * - 'I6c' for IPv6 addresses printed as specified by |
Uwe Kleine-König | 3f47240 | 2010-01-08 14:43:02 -0800 | [diff] [blame] | 965 | * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 966 | * - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form |
| 967 | * "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" |
| 968 | * Options for %pU are: |
| 969 | * b big endian lower case hex (default) |
| 970 | * B big endian UPPER case hex |
| 971 | * l little endian lower case hex |
| 972 | * L little endian UPPER case hex |
| 973 | * big endian output byte order is: |
| 974 | * [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15] |
| 975 | * little endian output byte order is: |
| 976 | * [3][2][1][0]-[5][4]-[7][6]-[8][9]-[10][11][12][13][14][15] |
Joe Perches | 7db6f5f | 2010-06-27 01:02:33 +0000 | [diff] [blame] | 977 | * - 'V' For a struct va_format which contains a format string * and va_list *, |
| 978 | * call vsnprintf(->format, *->va_list). |
| 979 | * Implements a "recursive vsnprintf". |
| 980 | * Do not use this feature without some mechanism to verify the |
| 981 | * correctness of the format string and va_list arguments. |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 982 | * |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 983 | * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 |
| 984 | * function pointers are really function descriptors, which contain a |
| 985 | * pointer to the real address. |
Linus Torvalds | 4d8a743 | 2008-07-06 16:24:57 -0700 | [diff] [blame] | 986 | */ |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 987 | static noinline_for_stack |
| 988 | char *pointer(const char *fmt, char *buf, char *end, void *ptr, |
| 989 | struct printf_spec spec) |
Linus Torvalds | 78a8bf6 | 2008-07-06 16:16:15 -0700 | [diff] [blame] | 990 | { |
Joe Perches | 5e05798 | 2010-10-26 14:22:50 -0700 | [diff] [blame] | 991 | if (!ptr) { |
| 992 | /* |
| 993 | * Print (null) with the same width as a pointer so it makes |
| 994 | * tabular output look nice. |
| 995 | */ |
| 996 | if (spec.field_width == -1) |
| 997 | spec.field_width = 2 * sizeof(void *); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 998 | return string(buf, end, "(null)", spec); |
Joe Perches | 5e05798 | 2010-10-26 14:22:50 -0700 | [diff] [blame] | 999 | } |
Linus Torvalds | d97106a | 2009-01-03 11:46:17 -0800 | [diff] [blame] | 1000 | |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 1001 | switch (*fmt) { |
| 1002 | case 'F': |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 1003 | case 'f': |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 1004 | ptr = dereference_function_descriptor(ptr); |
| 1005 | /* Fallthrough */ |
| 1006 | case 'S': |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 1007 | case 's': |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 1008 | return symbol_string(buf, end, ptr, spec, *fmt); |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 1009 | case 'R': |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 1010 | case 'r': |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 1011 | return resource_string(buf, end, ptr, spec, fmt); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 1012 | case 'M': /* Colon separated: 00:01:02:03:04:05 */ |
| 1013 | case 'm': /* Contiguous: 000102030405 */ |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 1014 | /* [mM]F (FDDI, bit reversed) */ |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 1015 | return mac_address_string(buf, end, ptr, spec, fmt); |
| 1016 | case 'I': /* Formatted IP supported |
| 1017 | * 4: 1.2.3.4 |
| 1018 | * 6: 0001:0203:...:0708 |
| 1019 | * 6c: 1::708 or 1::1.2.3.4 |
| 1020 | */ |
| 1021 | case 'i': /* Contiguous: |
| 1022 | * 4: 001.002.003.004 |
| 1023 | * 6: 000102...0f |
| 1024 | */ |
| 1025 | switch (fmt[1]) { |
| 1026 | case '6': |
| 1027 | return ip6_addr_string(buf, end, ptr, spec, fmt); |
| 1028 | case '4': |
| 1029 | return ip4_addr_string(buf, end, ptr, spec, fmt); |
| 1030 | } |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 1031 | break; |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 1032 | case 'U': |
| 1033 | return uuid_string(buf, end, ptr, spec, fmt); |
Joe Perches | 7db6f5f | 2010-06-27 01:02:33 +0000 | [diff] [blame] | 1034 | case 'V': |
| 1035 | return buf + vsnprintf(buf, end - buf, |
| 1036 | ((struct va_format *)ptr)->fmt, |
| 1037 | *(((struct va_format *)ptr)->va)); |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 1038 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1039 | spec.flags |= SMALL; |
| 1040 | if (spec.field_width == -1) { |
Joe Perches | 5e05798 | 2010-10-26 14:22:50 -0700 | [diff] [blame] | 1041 | spec.field_width = 2 * sizeof(void *); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1042 | spec.flags |= ZEROPAD; |
Linus Torvalds | 78a8bf6 | 2008-07-06 16:16:15 -0700 | [diff] [blame] | 1043 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1044 | spec.base = 16; |
| 1045 | |
| 1046 | return number(buf, end, (unsigned long) ptr, spec); |
| 1047 | } |
| 1048 | |
| 1049 | /* |
| 1050 | * Helper function to decode printf style format. |
| 1051 | * Each call decode a token from the format and return the |
| 1052 | * number of characters read (or likely the delta where it wants |
| 1053 | * to go on the next call). |
| 1054 | * The decoded token is returned through the parameters |
| 1055 | * |
| 1056 | * 'h', 'l', or 'L' for integer fields |
| 1057 | * 'z' support added 23/7/1999 S.H. |
| 1058 | * 'z' changed to 'Z' --davidm 1/25/99 |
| 1059 | * 't' added for ptrdiff_t |
| 1060 | * |
| 1061 | * @fmt: the format string |
| 1062 | * @type of the token returned |
| 1063 | * @flags: various flags such as +, -, # tokens.. |
| 1064 | * @field_width: overwritten width |
| 1065 | * @base: base of the number (octal, hex, ...) |
| 1066 | * @precision: precision of a number |
| 1067 | * @qualifier: qualifier of a number (long, size_t, ...) |
| 1068 | */ |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 1069 | static noinline_for_stack |
| 1070 | int format_decode(const char *fmt, struct printf_spec *spec) |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1071 | { |
| 1072 | const char *start = fmt; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1073 | |
| 1074 | /* we finished early by reading the field width */ |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1075 | if (spec->type == FORMAT_TYPE_WIDTH) { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1076 | if (spec->field_width < 0) { |
| 1077 | spec->field_width = -spec->field_width; |
| 1078 | spec->flags |= LEFT; |
| 1079 | } |
| 1080 | spec->type = FORMAT_TYPE_NONE; |
| 1081 | goto precision; |
| 1082 | } |
| 1083 | |
| 1084 | /* we finished early by reading the precision */ |
| 1085 | if (spec->type == FORMAT_TYPE_PRECISION) { |
| 1086 | if (spec->precision < 0) |
| 1087 | spec->precision = 0; |
| 1088 | |
| 1089 | spec->type = FORMAT_TYPE_NONE; |
| 1090 | goto qualifier; |
| 1091 | } |
| 1092 | |
| 1093 | /* By default */ |
| 1094 | spec->type = FORMAT_TYPE_NONE; |
| 1095 | |
| 1096 | for (; *fmt ; ++fmt) { |
| 1097 | if (*fmt == '%') |
| 1098 | break; |
| 1099 | } |
| 1100 | |
| 1101 | /* Return the current non-format string */ |
| 1102 | if (fmt != start || !*fmt) |
| 1103 | return fmt - start; |
| 1104 | |
| 1105 | /* Process flags */ |
| 1106 | spec->flags = 0; |
| 1107 | |
| 1108 | while (1) { /* this also skips first '%' */ |
| 1109 | bool found = true; |
| 1110 | |
| 1111 | ++fmt; |
| 1112 | |
| 1113 | switch (*fmt) { |
| 1114 | case '-': spec->flags |= LEFT; break; |
| 1115 | case '+': spec->flags |= PLUS; break; |
| 1116 | case ' ': spec->flags |= SPACE; break; |
| 1117 | case '#': spec->flags |= SPECIAL; break; |
| 1118 | case '0': spec->flags |= ZEROPAD; break; |
| 1119 | default: found = false; |
| 1120 | } |
| 1121 | |
| 1122 | if (!found) |
| 1123 | break; |
| 1124 | } |
| 1125 | |
| 1126 | /* get field width */ |
| 1127 | spec->field_width = -1; |
| 1128 | |
| 1129 | if (isdigit(*fmt)) |
| 1130 | spec->field_width = skip_atoi(&fmt); |
| 1131 | else if (*fmt == '*') { |
| 1132 | /* it's the next argument */ |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1133 | spec->type = FORMAT_TYPE_WIDTH; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1134 | return ++fmt - start; |
| 1135 | } |
| 1136 | |
| 1137 | precision: |
| 1138 | /* get the precision */ |
| 1139 | spec->precision = -1; |
| 1140 | if (*fmt == '.') { |
| 1141 | ++fmt; |
| 1142 | if (isdigit(*fmt)) { |
| 1143 | spec->precision = skip_atoi(&fmt); |
| 1144 | if (spec->precision < 0) |
| 1145 | spec->precision = 0; |
| 1146 | } else if (*fmt == '*') { |
| 1147 | /* it's the next argument */ |
Vegard Nossum | adf26f8 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1148 | spec->type = FORMAT_TYPE_PRECISION; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1149 | return ++fmt - start; |
| 1150 | } |
| 1151 | } |
| 1152 | |
| 1153 | qualifier: |
| 1154 | /* get the conversion qualifier */ |
| 1155 | spec->qualifier = -1; |
André Goddard Rosa | 08562cb | 2009-12-14 18:00:58 -0800 | [diff] [blame] | 1156 | if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || |
| 1157 | TOLOWER(*fmt) == 'z' || *fmt == 't') { |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1158 | spec->qualifier = *fmt++; |
| 1159 | if (unlikely(spec->qualifier == *fmt)) { |
| 1160 | if (spec->qualifier == 'l') { |
| 1161 | spec->qualifier = 'L'; |
| 1162 | ++fmt; |
| 1163 | } else if (spec->qualifier == 'h') { |
| 1164 | spec->qualifier = 'H'; |
| 1165 | ++fmt; |
| 1166 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1167 | } |
| 1168 | } |
| 1169 | |
| 1170 | /* default base */ |
| 1171 | spec->base = 10; |
| 1172 | switch (*fmt) { |
| 1173 | case 'c': |
| 1174 | spec->type = FORMAT_TYPE_CHAR; |
| 1175 | return ++fmt - start; |
| 1176 | |
| 1177 | case 's': |
| 1178 | spec->type = FORMAT_TYPE_STR; |
| 1179 | return ++fmt - start; |
| 1180 | |
| 1181 | case 'p': |
| 1182 | spec->type = FORMAT_TYPE_PTR; |
| 1183 | return fmt - start; |
| 1184 | /* skip alnum */ |
| 1185 | |
| 1186 | case 'n': |
| 1187 | spec->type = FORMAT_TYPE_NRCHARS; |
| 1188 | return ++fmt - start; |
| 1189 | |
| 1190 | case '%': |
| 1191 | spec->type = FORMAT_TYPE_PERCENT_CHAR; |
| 1192 | return ++fmt - start; |
| 1193 | |
| 1194 | /* integer number formats - set up the flags and "break" */ |
| 1195 | case 'o': |
| 1196 | spec->base = 8; |
| 1197 | break; |
| 1198 | |
| 1199 | case 'x': |
| 1200 | spec->flags |= SMALL; |
| 1201 | |
| 1202 | case 'X': |
| 1203 | spec->base = 16; |
| 1204 | break; |
| 1205 | |
| 1206 | case 'd': |
| 1207 | case 'i': |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1208 | spec->flags |= SIGN; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1209 | case 'u': |
| 1210 | break; |
| 1211 | |
| 1212 | default: |
| 1213 | spec->type = FORMAT_TYPE_INVALID; |
| 1214 | return fmt - start; |
| 1215 | } |
| 1216 | |
| 1217 | if (spec->qualifier == 'L') |
| 1218 | spec->type = FORMAT_TYPE_LONG_LONG; |
| 1219 | else if (spec->qualifier == 'l') { |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1220 | if (spec->flags & SIGN) |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1221 | spec->type = FORMAT_TYPE_LONG; |
| 1222 | else |
| 1223 | spec->type = FORMAT_TYPE_ULONG; |
André Goddard Rosa | 08562cb | 2009-12-14 18:00:58 -0800 | [diff] [blame] | 1224 | } else if (TOLOWER(spec->qualifier) == 'z') { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1225 | spec->type = FORMAT_TYPE_SIZE_T; |
| 1226 | } else if (spec->qualifier == 't') { |
| 1227 | spec->type = FORMAT_TYPE_PTRDIFF; |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1228 | } else if (spec->qualifier == 'H') { |
| 1229 | if (spec->flags & SIGN) |
| 1230 | spec->type = FORMAT_TYPE_BYTE; |
| 1231 | else |
| 1232 | spec->type = FORMAT_TYPE_UBYTE; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1233 | } else if (spec->qualifier == 'h') { |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1234 | if (spec->flags & SIGN) |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1235 | spec->type = FORMAT_TYPE_SHORT; |
| 1236 | else |
| 1237 | spec->type = FORMAT_TYPE_USHORT; |
| 1238 | } else { |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1239 | if (spec->flags & SIGN) |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1240 | spec->type = FORMAT_TYPE_INT; |
| 1241 | else |
| 1242 | spec->type = FORMAT_TYPE_UINT; |
| 1243 | } |
| 1244 | |
| 1245 | return ++fmt - start; |
Linus Torvalds | 78a8bf6 | 2008-07-06 16:16:15 -0700 | [diff] [blame] | 1246 | } |
| 1247 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | /** |
| 1249 | * vsnprintf - Format a string and place it in a buffer |
| 1250 | * @buf: The buffer to place the result into |
| 1251 | * @size: The size of the buffer, including the trailing null space |
| 1252 | * @fmt: The format string to use |
| 1253 | * @args: Arguments for the format string |
| 1254 | * |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1255 | * This function follows C99 vsnprintf, but has some extensions: |
Steven Rostedt | 91adcd2 | 2009-09-16 20:03:06 -0400 | [diff] [blame] | 1256 | * %pS output the name of a text symbol with offset |
| 1257 | * %ps output the name of a text symbol without offset |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 1258 | * %pF output the name of a function pointer with its offset |
| 1259 | * %pf output the name of a function pointer without its offset |
Uwe Kleine-König | 8a79503 | 2009-12-17 15:27:12 -0800 | [diff] [blame] | 1260 | * %pR output the address range in a struct resource with decoded flags |
| 1261 | * %pr output the address range in a struct resource with raw flags |
| 1262 | * %pM output a 6-byte MAC address with colons |
| 1263 | * %pm output a 6-byte MAC address without colons |
| 1264 | * %pI4 print an IPv4 address without leading zeros |
| 1265 | * %pi4 print an IPv4 address with leading zeros |
| 1266 | * %pI6 print an IPv6 address with colons |
| 1267 | * %pi6 print an IPv6 address without colons |
| 1268 | * %pI6c print an IPv6 address as specified by |
Uwe Kleine-König | 3f47240 | 2010-01-08 14:43:02 -0800 | [diff] [blame] | 1269 | * 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] | 1270 | * %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper |
| 1271 | * case. |
Steven Rostedt | 0efb4d2 | 2009-09-17 09:27:29 -0400 | [diff] [blame] | 1272 | * %n is ignored |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1273 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1274 | * The return value is the number of characters which would |
| 1275 | * be generated for the given input, excluding the trailing |
| 1276 | * '\0', as per ISO C99. If you want to have the exact |
| 1277 | * number of characters written into @buf as return value |
Robert P. J. Day | 72fd4a3 | 2007-02-10 01:45:59 -0800 | [diff] [blame] | 1278 | * (not including the trailing '\0'), use vscnprintf(). If the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1279 | * return is greater than or equal to @size, the resulting |
| 1280 | * string is truncated. |
| 1281 | * |
| 1282 | * 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] | 1283 | * You probably want snprintf() instead. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | */ |
| 1285 | int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) |
| 1286 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | unsigned long long num; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1288 | char *str, *end; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1289 | struct printf_spec spec = {0}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1290 | |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1291 | /* Reject out-of-range values early. Large positive sizes are |
| 1292 | used for unknown buffer sizes. */ |
Marcin Slusarz | 2f30b1f9 | 2009-09-21 17:04:29 -0700 | [diff] [blame] | 1293 | if (WARN_ON_ONCE((int) size < 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1295 | |
| 1296 | str = buf; |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1297 | end = buf + size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1298 | |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1299 | /* Make sure end is always >= buf */ |
| 1300 | if (end < buf) { |
| 1301 | end = ((void *)-1); |
| 1302 | size = end - buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1303 | } |
| 1304 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1305 | while (*fmt) { |
| 1306 | const char *old_fmt = fmt; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1307 | int read = format_decode(fmt, &spec); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1308 | |
| 1309 | fmt += read; |
| 1310 | |
| 1311 | switch (spec.type) { |
| 1312 | case FORMAT_TYPE_NONE: { |
| 1313 | int copy = read; |
| 1314 | if (str < end) { |
| 1315 | if (copy > end - str) |
| 1316 | copy = end - str; |
| 1317 | memcpy(str, old_fmt, copy); |
| 1318 | } |
| 1319 | str += read; |
| 1320 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1321 | } |
| 1322 | |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1323 | case FORMAT_TYPE_WIDTH: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1324 | spec.field_width = va_arg(args, int); |
| 1325 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1327 | case FORMAT_TYPE_PRECISION: |
| 1328 | spec.precision = va_arg(args, int); |
| 1329 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1330 | |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1331 | case FORMAT_TYPE_CHAR: { |
| 1332 | char c; |
| 1333 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1334 | if (!(spec.flags & LEFT)) { |
| 1335 | while (--spec.field_width > 0) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1336 | if (str < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | *str = ' '; |
| 1338 | ++str; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1339 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1341 | } |
| 1342 | c = (unsigned char) va_arg(args, int); |
| 1343 | if (str < end) |
| 1344 | *str = c; |
| 1345 | ++str; |
| 1346 | while (--spec.field_width > 0) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1347 | if (str < end) |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1348 | *str = ' '; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1349 | ++str; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1350 | } |
| 1351 | break; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1352 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1354 | case FORMAT_TYPE_STR: |
| 1355 | str = string(str, end, va_arg(args, char *), spec); |
| 1356 | break; |
| 1357 | |
| 1358 | case FORMAT_TYPE_PTR: |
| 1359 | str = pointer(fmt+1, str, end, va_arg(args, void *), |
| 1360 | spec); |
| 1361 | while (isalnum(*fmt)) |
| 1362 | fmt++; |
| 1363 | break; |
| 1364 | |
| 1365 | case FORMAT_TYPE_PERCENT_CHAR: |
| 1366 | if (str < end) |
| 1367 | *str = '%'; |
| 1368 | ++str; |
| 1369 | break; |
| 1370 | |
| 1371 | case FORMAT_TYPE_INVALID: |
| 1372 | if (str < end) |
| 1373 | *str = '%'; |
| 1374 | ++str; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1375 | break; |
| 1376 | |
| 1377 | case FORMAT_TYPE_NRCHARS: { |
Joe Perches | ef0658f | 2010-03-06 17:10:14 -0800 | [diff] [blame] | 1378 | u8 qualifier = spec.qualifier; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1379 | |
| 1380 | if (qualifier == 'l') { |
| 1381 | long *ip = va_arg(args, long *); |
| 1382 | *ip = (str - buf); |
André Goddard Rosa | 08562cb | 2009-12-14 18:00:58 -0800 | [diff] [blame] | 1383 | } else if (TOLOWER(qualifier) == 'z') { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1384 | size_t *ip = va_arg(args, size_t *); |
| 1385 | *ip = (str - buf); |
| 1386 | } else { |
| 1387 | int *ip = va_arg(args, int *); |
| 1388 | *ip = (str - buf); |
| 1389 | } |
| 1390 | break; |
| 1391 | } |
| 1392 | |
| 1393 | default: |
| 1394 | switch (spec.type) { |
| 1395 | case FORMAT_TYPE_LONG_LONG: |
| 1396 | num = va_arg(args, long long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | break; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1398 | case FORMAT_TYPE_ULONG: |
| 1399 | num = va_arg(args, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | break; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1401 | case FORMAT_TYPE_LONG: |
| 1402 | num = va_arg(args, long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1403 | break; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1404 | case FORMAT_TYPE_SIZE_T: |
| 1405 | num = va_arg(args, size_t); |
| 1406 | break; |
| 1407 | case FORMAT_TYPE_PTRDIFF: |
| 1408 | num = va_arg(args, ptrdiff_t); |
| 1409 | break; |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1410 | case FORMAT_TYPE_UBYTE: |
| 1411 | num = (unsigned char) va_arg(args, int); |
| 1412 | break; |
| 1413 | case FORMAT_TYPE_BYTE: |
| 1414 | num = (signed char) va_arg(args, int); |
| 1415 | break; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1416 | case FORMAT_TYPE_USHORT: |
| 1417 | num = (unsigned short) va_arg(args, int); |
| 1418 | break; |
| 1419 | case FORMAT_TYPE_SHORT: |
| 1420 | num = (short) va_arg(args, int); |
| 1421 | break; |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1422 | case FORMAT_TYPE_INT: |
| 1423 | num = (int) va_arg(args, int); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1424 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1425 | default: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1426 | num = va_arg(args, unsigned int); |
| 1427 | } |
| 1428 | |
| 1429 | str = number(str, end, num, spec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1430 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1431 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1432 | |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1433 | if (size > 0) { |
| 1434 | if (str < end) |
| 1435 | *str = '\0'; |
| 1436 | else |
Linus Torvalds | 0a6047e | 2006-06-28 17:09:34 -0700 | [diff] [blame] | 1437 | end[-1] = '\0'; |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1438 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1439 | |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1440 | /* the trailing null byte doesn't count towards the total */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | return str-buf; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1442 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | EXPORT_SYMBOL(vsnprintf); |
| 1445 | |
| 1446 | /** |
| 1447 | * vscnprintf - Format a string and place it in a buffer |
| 1448 | * @buf: The buffer to place the result into |
| 1449 | * @size: The size of the buffer, including the trailing null space |
| 1450 | * @fmt: The format string to use |
| 1451 | * @args: Arguments for the format string |
| 1452 | * |
| 1453 | * The return value is the number of characters which have been written into |
| 1454 | * the @buf not including the trailing '\0'. If @size is <= 0 the function |
| 1455 | * returns 0. |
| 1456 | * |
| 1457 | * 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] | 1458 | * You probably want scnprintf() instead. |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1459 | * |
| 1460 | * See the vsnprintf() documentation for format string extensions over C99. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | */ |
| 1462 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) |
| 1463 | { |
| 1464 | int i; |
| 1465 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1466 | i = vsnprintf(buf, size, fmt, args); |
| 1467 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1468 | return (i >= size) ? (size - 1) : i; |
| 1469 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1470 | EXPORT_SYMBOL(vscnprintf); |
| 1471 | |
| 1472 | /** |
| 1473 | * snprintf - Format a string and place it in a buffer |
| 1474 | * @buf: The buffer to place the result into |
| 1475 | * @size: The size of the buffer, including the trailing null space |
| 1476 | * @fmt: The format string to use |
| 1477 | * @...: Arguments for the format string |
| 1478 | * |
| 1479 | * The return value is the number of characters which would be |
| 1480 | * generated for the given input, excluding the trailing null, |
| 1481 | * as per ISO C99. If the return is greater than or equal to |
| 1482 | * @size, the resulting string is truncated. |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1483 | * |
| 1484 | * See the vsnprintf() documentation for format string extensions over C99. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1485 | */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1486 | int snprintf(char *buf, size_t size, const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | { |
| 1488 | va_list args; |
| 1489 | int i; |
| 1490 | |
| 1491 | va_start(args, fmt); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1492 | i = vsnprintf(buf, size, fmt, args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1493 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1494 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1495 | return i; |
| 1496 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1497 | EXPORT_SYMBOL(snprintf); |
| 1498 | |
| 1499 | /** |
| 1500 | * scnprintf - Format a string and place it in a buffer |
| 1501 | * @buf: The buffer to place the result into |
| 1502 | * @size: The size of the buffer, including the trailing null space |
| 1503 | * @fmt: The format string to use |
| 1504 | * @...: Arguments for the format string |
| 1505 | * |
| 1506 | * The return value is the number of characters written into @buf not including |
Changli Gao | b903c0b | 2010-10-26 14:22:50 -0700 | [diff] [blame] | 1507 | * the trailing '\0'. If @size is == 0 the function returns 0. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1508 | */ |
| 1509 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1510 | int scnprintf(char *buf, size_t size, const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1511 | { |
| 1512 | va_list args; |
| 1513 | int i; |
| 1514 | |
| 1515 | va_start(args, fmt); |
| 1516 | i = vsnprintf(buf, size, fmt, args); |
| 1517 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1518 | |
Changli Gao | b903c0b | 2010-10-26 14:22:50 -0700 | [diff] [blame] | 1519 | if (likely(i < size)) |
| 1520 | return i; |
| 1521 | if (size != 0) |
| 1522 | return size - 1; |
| 1523 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1524 | } |
| 1525 | EXPORT_SYMBOL(scnprintf); |
| 1526 | |
| 1527 | /** |
| 1528 | * vsprintf - Format a string and place it in a buffer |
| 1529 | * @buf: The buffer to place the result into |
| 1530 | * @fmt: The format string to use |
| 1531 | * @args: Arguments for the format string |
| 1532 | * |
| 1533 | * The function returns the number of characters written |
Robert P. J. Day | 72fd4a3 | 2007-02-10 01:45:59 -0800 | [diff] [blame] | 1534 | * into @buf. Use vsnprintf() or vscnprintf() in order to avoid |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | * buffer overflows. |
| 1536 | * |
| 1537 | * 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] | 1538 | * You probably want sprintf() instead. |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1539 | * |
| 1540 | * See the vsnprintf() documentation for format string extensions over C99. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1541 | */ |
| 1542 | int vsprintf(char *buf, const char *fmt, va_list args) |
| 1543 | { |
| 1544 | return vsnprintf(buf, INT_MAX, fmt, args); |
| 1545 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1546 | EXPORT_SYMBOL(vsprintf); |
| 1547 | |
| 1548 | /** |
| 1549 | * sprintf - Format a string and place it in a buffer |
| 1550 | * @buf: The buffer to place the result into |
| 1551 | * @fmt: The format string to use |
| 1552 | * @...: Arguments for the format string |
| 1553 | * |
| 1554 | * The function returns the number of characters written |
Robert P. J. Day | 72fd4a3 | 2007-02-10 01:45:59 -0800 | [diff] [blame] | 1555 | * into @buf. Use snprintf() or scnprintf() in order to avoid |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | * buffer overflows. |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1557 | * |
| 1558 | * See the vsnprintf() documentation for format string extensions over C99. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1559 | */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1560 | int sprintf(char *buf, const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1561 | { |
| 1562 | va_list args; |
| 1563 | int i; |
| 1564 | |
| 1565 | va_start(args, fmt); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1566 | i = vsnprintf(buf, INT_MAX, fmt, args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1568 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | return i; |
| 1570 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | EXPORT_SYMBOL(sprintf); |
| 1572 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1573 | #ifdef CONFIG_BINARY_PRINTF |
| 1574 | /* |
| 1575 | * bprintf service: |
| 1576 | * vbin_printf() - VA arguments to binary data |
| 1577 | * bstr_printf() - Binary data to text string |
| 1578 | */ |
| 1579 | |
| 1580 | /** |
| 1581 | * vbin_printf - Parse a format string and place args' binary value in a buffer |
| 1582 | * @bin_buf: The buffer to place args' binary value |
| 1583 | * @size: The size of the buffer(by words(32bits), not characters) |
| 1584 | * @fmt: The format string to use |
| 1585 | * @args: Arguments for the format string |
| 1586 | * |
| 1587 | * The format follows C99 vsnprintf, except %n is ignored, and its argument |
| 1588 | * is skiped. |
| 1589 | * |
| 1590 | * The return value is the number of words(32bits) which would be generated for |
| 1591 | * the given input. |
| 1592 | * |
| 1593 | * NOTE: |
| 1594 | * If the return value is greater than @size, the resulting bin_buf is NOT |
| 1595 | * valid for bstr_printf(). |
| 1596 | */ |
| 1597 | int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args) |
| 1598 | { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1599 | struct printf_spec spec = {0}; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1600 | char *str, *end; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1601 | |
| 1602 | str = (char *)bin_buf; |
| 1603 | end = (char *)(bin_buf + size); |
| 1604 | |
| 1605 | #define save_arg(type) \ |
| 1606 | do { \ |
| 1607 | if (sizeof(type) == 8) { \ |
| 1608 | unsigned long long value; \ |
| 1609 | str = PTR_ALIGN(str, sizeof(u32)); \ |
| 1610 | value = va_arg(args, unsigned long long); \ |
| 1611 | if (str + sizeof(type) <= end) { \ |
| 1612 | *(u32 *)str = *(u32 *)&value; \ |
| 1613 | *(u32 *)(str + 4) = *((u32 *)&value + 1); \ |
| 1614 | } \ |
| 1615 | } else { \ |
| 1616 | unsigned long value; \ |
| 1617 | str = PTR_ALIGN(str, sizeof(type)); \ |
| 1618 | value = va_arg(args, int); \ |
| 1619 | if (str + sizeof(type) <= end) \ |
| 1620 | *(typeof(type) *)str = (type)value; \ |
| 1621 | } \ |
| 1622 | str += sizeof(type); \ |
| 1623 | } while (0) |
| 1624 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1625 | while (*fmt) { |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1626 | int read = format_decode(fmt, &spec); |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1627 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1628 | fmt += read; |
| 1629 | |
| 1630 | switch (spec.type) { |
| 1631 | case FORMAT_TYPE_NONE: |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1632 | case FORMAT_TYPE_INVALID: |
| 1633 | case FORMAT_TYPE_PERCENT_CHAR: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1634 | break; |
| 1635 | |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1636 | case FORMAT_TYPE_WIDTH: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1637 | case FORMAT_TYPE_PRECISION: |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1638 | save_arg(int); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1639 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1640 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1641 | case FORMAT_TYPE_CHAR: |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1642 | save_arg(char); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1643 | break; |
| 1644 | |
| 1645 | case FORMAT_TYPE_STR: { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1646 | const char *save_str = va_arg(args, char *); |
| 1647 | size_t len; |
André Goddard Rosa | 6c35663 | 2009-12-14 18:00:56 -0800 | [diff] [blame] | 1648 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1649 | if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE |
| 1650 | || (unsigned long)save_str < PAGE_SIZE) |
André Goddard Rosa | 0f4f81d | 2009-12-14 18:00:55 -0800 | [diff] [blame] | 1651 | save_str = "(null)"; |
André Goddard Rosa | 6c35663 | 2009-12-14 18:00:56 -0800 | [diff] [blame] | 1652 | len = strlen(save_str) + 1; |
| 1653 | if (str + len < end) |
| 1654 | memcpy(str, save_str, len); |
| 1655 | str += len; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1656 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1657 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1658 | |
| 1659 | case FORMAT_TYPE_PTR: |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1660 | save_arg(void *); |
| 1661 | /* skip all alphanumeric pointer suffixes */ |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1662 | while (isalnum(*fmt)) |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1663 | fmt++; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1664 | break; |
| 1665 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1666 | case FORMAT_TYPE_NRCHARS: { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1667 | /* skip %n 's argument */ |
Joe Perches | ef0658f | 2010-03-06 17:10:14 -0800 | [diff] [blame] | 1668 | u8 qualifier = spec.qualifier; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1669 | void *skip_arg; |
| 1670 | if (qualifier == 'l') |
| 1671 | skip_arg = va_arg(args, long *); |
André Goddard Rosa | 08562cb | 2009-12-14 18:00:58 -0800 | [diff] [blame] | 1672 | else if (TOLOWER(qualifier) == 'z') |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1673 | skip_arg = va_arg(args, size_t *); |
| 1674 | else |
| 1675 | skip_arg = va_arg(args, int *); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1676 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1677 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1678 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1679 | default: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1680 | switch (spec.type) { |
| 1681 | |
| 1682 | case FORMAT_TYPE_LONG_LONG: |
| 1683 | save_arg(long long); |
| 1684 | break; |
| 1685 | case FORMAT_TYPE_ULONG: |
| 1686 | case FORMAT_TYPE_LONG: |
| 1687 | save_arg(unsigned long); |
| 1688 | break; |
| 1689 | case FORMAT_TYPE_SIZE_T: |
| 1690 | save_arg(size_t); |
| 1691 | break; |
| 1692 | case FORMAT_TYPE_PTRDIFF: |
| 1693 | save_arg(ptrdiff_t); |
| 1694 | break; |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1695 | case FORMAT_TYPE_UBYTE: |
| 1696 | case FORMAT_TYPE_BYTE: |
| 1697 | save_arg(char); |
| 1698 | break; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1699 | case FORMAT_TYPE_USHORT: |
| 1700 | case FORMAT_TYPE_SHORT: |
| 1701 | save_arg(short); |
| 1702 | break; |
| 1703 | default: |
| 1704 | save_arg(int); |
| 1705 | } |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1706 | } |
| 1707 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1708 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1709 | return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1710 | #undef save_arg |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1711 | } |
| 1712 | EXPORT_SYMBOL_GPL(vbin_printf); |
| 1713 | |
| 1714 | /** |
| 1715 | * bstr_printf - Format a string from binary arguments and place it in a buffer |
| 1716 | * @buf: The buffer to place the result into |
| 1717 | * @size: The size of the buffer, including the trailing null space |
| 1718 | * @fmt: The format string to use |
| 1719 | * @bin_buf: Binary arguments for the format string |
| 1720 | * |
| 1721 | * This function like C99 vsnprintf, but the difference is that vsnprintf gets |
| 1722 | * arguments from stack, and bstr_printf gets arguments from @bin_buf which is |
| 1723 | * a binary buffer that generated by vbin_printf. |
| 1724 | * |
| 1725 | * The format follows C99 vsnprintf, but has some extensions: |
Steven Rostedt | 0efb4d2 | 2009-09-17 09:27:29 -0400 | [diff] [blame] | 1726 | * see vsnprintf comment for details. |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1727 | * |
| 1728 | * The return value is the number of characters which would |
| 1729 | * be generated for the given input, excluding the trailing |
| 1730 | * '\0', as per ISO C99. If you want to have the exact |
| 1731 | * number of characters written into @buf as return value |
| 1732 | * (not including the trailing '\0'), use vscnprintf(). If the |
| 1733 | * return is greater than or equal to @size, the resulting |
| 1734 | * string is truncated. |
| 1735 | */ |
| 1736 | int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf) |
| 1737 | { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1738 | struct printf_spec spec = {0}; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1739 | char *str, *end; |
| 1740 | const char *args = (const char *)bin_buf; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1741 | |
Marcin Slusarz | 2f30b1f9 | 2009-09-21 17:04:29 -0700 | [diff] [blame] | 1742 | if (WARN_ON_ONCE((int) size < 0)) |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1743 | return 0; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1744 | |
| 1745 | str = buf; |
| 1746 | end = buf + size; |
| 1747 | |
| 1748 | #define get_arg(type) \ |
| 1749 | ({ \ |
| 1750 | typeof(type) value; \ |
| 1751 | if (sizeof(type) == 8) { \ |
| 1752 | args = PTR_ALIGN(args, sizeof(u32)); \ |
| 1753 | *(u32 *)&value = *(u32 *)args; \ |
| 1754 | *((u32 *)&value + 1) = *(u32 *)(args + 4); \ |
| 1755 | } else { \ |
| 1756 | args = PTR_ALIGN(args, sizeof(type)); \ |
| 1757 | value = *(typeof(type) *)args; \ |
| 1758 | } \ |
| 1759 | args += sizeof(type); \ |
| 1760 | value; \ |
| 1761 | }) |
| 1762 | |
| 1763 | /* Make sure end is always >= buf */ |
| 1764 | if (end < buf) { |
| 1765 | end = ((void *)-1); |
| 1766 | size = end - buf; |
| 1767 | } |
| 1768 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1769 | while (*fmt) { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1770 | const char *old_fmt = fmt; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1771 | int read = format_decode(fmt, &spec); |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1772 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1773 | fmt += read; |
| 1774 | |
| 1775 | switch (spec.type) { |
| 1776 | case FORMAT_TYPE_NONE: { |
| 1777 | int copy = read; |
| 1778 | if (str < end) { |
| 1779 | if (copy > end - str) |
| 1780 | copy = end - str; |
| 1781 | memcpy(str, old_fmt, copy); |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1782 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1783 | str += read; |
| 1784 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1785 | } |
| 1786 | |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1787 | case FORMAT_TYPE_WIDTH: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1788 | spec.field_width = get_arg(int); |
| 1789 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1790 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1791 | case FORMAT_TYPE_PRECISION: |
| 1792 | spec.precision = get_arg(int); |
| 1793 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1794 | |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1795 | case FORMAT_TYPE_CHAR: { |
| 1796 | char c; |
| 1797 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1798 | if (!(spec.flags & LEFT)) { |
| 1799 | while (--spec.field_width > 0) { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1800 | if (str < end) |
| 1801 | *str = ' '; |
| 1802 | ++str; |
| 1803 | } |
| 1804 | } |
| 1805 | c = (unsigned char) get_arg(char); |
| 1806 | if (str < end) |
| 1807 | *str = c; |
| 1808 | ++str; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1809 | while (--spec.field_width > 0) { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1810 | if (str < end) |
| 1811 | *str = ' '; |
| 1812 | ++str; |
| 1813 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1814 | break; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1815 | } |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1816 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1817 | case FORMAT_TYPE_STR: { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1818 | const char *str_arg = args; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1819 | args += strlen(str_arg) + 1; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1820 | str = string(str, end, (char *)str_arg, spec); |
| 1821 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1822 | } |
| 1823 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1824 | case FORMAT_TYPE_PTR: |
| 1825 | str = pointer(fmt+1, str, end, get_arg(void *), spec); |
| 1826 | while (isalnum(*fmt)) |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1827 | fmt++; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1828 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1829 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1830 | case FORMAT_TYPE_PERCENT_CHAR: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1831 | case FORMAT_TYPE_INVALID: |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1832 | if (str < end) |
| 1833 | *str = '%'; |
| 1834 | ++str; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1835 | break; |
| 1836 | |
| 1837 | case FORMAT_TYPE_NRCHARS: |
| 1838 | /* skip */ |
| 1839 | break; |
| 1840 | |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1841 | default: { |
| 1842 | unsigned long long num; |
| 1843 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1844 | switch (spec.type) { |
| 1845 | |
| 1846 | case FORMAT_TYPE_LONG_LONG: |
| 1847 | num = get_arg(long long); |
| 1848 | break; |
| 1849 | case FORMAT_TYPE_ULONG: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1850 | case FORMAT_TYPE_LONG: |
| 1851 | num = get_arg(unsigned long); |
| 1852 | break; |
| 1853 | case FORMAT_TYPE_SIZE_T: |
| 1854 | num = get_arg(size_t); |
| 1855 | break; |
| 1856 | case FORMAT_TYPE_PTRDIFF: |
| 1857 | num = get_arg(ptrdiff_t); |
| 1858 | break; |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1859 | case FORMAT_TYPE_UBYTE: |
| 1860 | num = get_arg(unsigned char); |
| 1861 | break; |
| 1862 | case FORMAT_TYPE_BYTE: |
| 1863 | num = get_arg(signed char); |
| 1864 | break; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1865 | case FORMAT_TYPE_USHORT: |
| 1866 | num = get_arg(unsigned short); |
| 1867 | break; |
| 1868 | case FORMAT_TYPE_SHORT: |
| 1869 | num = get_arg(short); |
| 1870 | break; |
| 1871 | case FORMAT_TYPE_UINT: |
| 1872 | num = get_arg(unsigned int); |
| 1873 | break; |
| 1874 | default: |
| 1875 | num = get_arg(int); |
| 1876 | } |
| 1877 | |
| 1878 | str = number(str, end, num, spec); |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1879 | } /* default: */ |
| 1880 | } /* switch(spec.type) */ |
| 1881 | } /* while(*fmt) */ |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1882 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1883 | if (size > 0) { |
| 1884 | if (str < end) |
| 1885 | *str = '\0'; |
| 1886 | else |
| 1887 | end[-1] = '\0'; |
| 1888 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1889 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1890 | #undef get_arg |
| 1891 | |
| 1892 | /* the trailing null byte doesn't count towards the total */ |
| 1893 | return str - buf; |
| 1894 | } |
| 1895 | EXPORT_SYMBOL_GPL(bstr_printf); |
| 1896 | |
| 1897 | /** |
| 1898 | * bprintf - Parse a format string and place args' binary value in a buffer |
| 1899 | * @bin_buf: The buffer to place args' binary value |
| 1900 | * @size: The size of the buffer(by words(32bits), not characters) |
| 1901 | * @fmt: The format string to use |
| 1902 | * @...: Arguments for the format string |
| 1903 | * |
| 1904 | * The function returns the number of words(u32) written |
| 1905 | * into @bin_buf. |
| 1906 | */ |
| 1907 | int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) |
| 1908 | { |
| 1909 | va_list args; |
| 1910 | int ret; |
| 1911 | |
| 1912 | va_start(args, fmt); |
| 1913 | ret = vbin_printf(bin_buf, size, fmt, args); |
| 1914 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1915 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1916 | return ret; |
| 1917 | } |
| 1918 | EXPORT_SYMBOL_GPL(bprintf); |
| 1919 | |
| 1920 | #endif /* CONFIG_BINARY_PRINTF */ |
| 1921 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | /** |
| 1923 | * vsscanf - Unformat a buffer into a list of arguments |
| 1924 | * @buf: input buffer |
| 1925 | * @fmt: format of buffer |
| 1926 | * @args: arguments |
| 1927 | */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1928 | int vsscanf(const char *buf, const char *fmt, va_list args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | { |
| 1930 | const char *str = buf; |
| 1931 | char *next; |
| 1932 | char digit; |
| 1933 | int num = 0; |
Joe Perches | ef0658f | 2010-03-06 17:10:14 -0800 | [diff] [blame] | 1934 | u8 qualifier; |
| 1935 | u8 base; |
| 1936 | s16 field_width; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1937 | bool is_sign; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1938 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1939 | while (*fmt && *str) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | /* skip any white space in format */ |
| 1941 | /* white space in format matchs any amount of |
| 1942 | * white space, including none, in the input. |
| 1943 | */ |
| 1944 | if (isspace(*fmt)) { |
André Goddard Rosa | e7d2860 | 2009-12-14 18:01:06 -0800 | [diff] [blame] | 1945 | fmt = skip_spaces(++fmt); |
| 1946 | str = skip_spaces(str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1947 | } |
| 1948 | |
| 1949 | /* anything that is not a conversion must match exactly */ |
| 1950 | if (*fmt != '%' && *fmt) { |
| 1951 | if (*fmt++ != *str++) |
| 1952 | break; |
| 1953 | continue; |
| 1954 | } |
| 1955 | |
| 1956 | if (!*fmt) |
| 1957 | break; |
| 1958 | ++fmt; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1959 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1960 | /* skip this conversion. |
| 1961 | * advance both strings to next white space |
| 1962 | */ |
| 1963 | if (*fmt == '*') { |
Andy Spencer | 8fccae2 | 2009-10-01 15:44:27 -0700 | [diff] [blame] | 1964 | while (!isspace(*fmt) && *fmt != '%' && *fmt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1965 | fmt++; |
| 1966 | while (!isspace(*str) && *str) |
| 1967 | str++; |
| 1968 | continue; |
| 1969 | } |
| 1970 | |
| 1971 | /* get field width */ |
| 1972 | field_width = -1; |
| 1973 | if (isdigit(*fmt)) |
| 1974 | field_width = skip_atoi(&fmt); |
| 1975 | |
| 1976 | /* get conversion qualifier */ |
| 1977 | qualifier = -1; |
André Goddard Rosa | 08562cb | 2009-12-14 18:00:58 -0800 | [diff] [blame] | 1978 | if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || |
| 1979 | TOLOWER(*fmt) == 'z') { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | qualifier = *fmt++; |
| 1981 | if (unlikely(qualifier == *fmt)) { |
| 1982 | if (qualifier == 'h') { |
| 1983 | qualifier = 'H'; |
| 1984 | fmt++; |
| 1985 | } else if (qualifier == 'l') { |
| 1986 | qualifier = 'L'; |
| 1987 | fmt++; |
| 1988 | } |
| 1989 | } |
| 1990 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1991 | |
| 1992 | if (!*fmt || !*str) |
| 1993 | break; |
| 1994 | |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1995 | base = 10; |
| 1996 | is_sign = 0; |
| 1997 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1998 | switch (*fmt++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1999 | case 'c': |
| 2000 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2001 | char *s = (char *)va_arg(args, char*); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | if (field_width == -1) |
| 2003 | field_width = 1; |
| 2004 | do { |
| 2005 | *s++ = *str++; |
| 2006 | } while (--field_width > 0 && *str); |
| 2007 | num++; |
| 2008 | } |
| 2009 | continue; |
| 2010 | case 's': |
| 2011 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2012 | char *s = (char *)va_arg(args, char *); |
| 2013 | if (field_width == -1) |
Alexey Dobriyan | 4be929b | 2010-05-24 14:33:03 -0700 | [diff] [blame] | 2014 | field_width = SHRT_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2015 | /* first, skip leading white space in buffer */ |
André Goddard Rosa | e7d2860 | 2009-12-14 18:01:06 -0800 | [diff] [blame] | 2016 | str = skip_spaces(str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2017 | |
| 2018 | /* now copy until next white space */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2019 | while (*str && !isspace(*str) && field_width--) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2020 | *s++ = *str++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2021 | *s = '\0'; |
| 2022 | num++; |
| 2023 | } |
| 2024 | continue; |
| 2025 | case 'n': |
| 2026 | /* return number of characters read so far */ |
| 2027 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2028 | int *i = (int *)va_arg(args, int*); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2029 | *i = str - buf; |
| 2030 | } |
| 2031 | continue; |
| 2032 | case 'o': |
| 2033 | base = 8; |
| 2034 | break; |
| 2035 | case 'x': |
| 2036 | case 'X': |
| 2037 | base = 16; |
| 2038 | break; |
| 2039 | case 'i': |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2040 | base = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2041 | case 'd': |
| 2042 | is_sign = 1; |
| 2043 | case 'u': |
| 2044 | break; |
| 2045 | case '%': |
| 2046 | /* looking for '%' in str */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2047 | if (*str++ != '%') |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2048 | return num; |
| 2049 | continue; |
| 2050 | default: |
| 2051 | /* invalid format; stop here */ |
| 2052 | return num; |
| 2053 | } |
| 2054 | |
| 2055 | /* have some sort of integer conversion. |
| 2056 | * first, skip white space in buffer. |
| 2057 | */ |
André Goddard Rosa | e7d2860 | 2009-12-14 18:01:06 -0800 | [diff] [blame] | 2058 | str = skip_spaces(str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | |
| 2060 | digit = *str; |
| 2061 | if (is_sign && digit == '-') |
| 2062 | digit = *(str + 1); |
| 2063 | |
| 2064 | if (!digit |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2065 | || (base == 16 && !isxdigit(digit)) |
| 2066 | || (base == 10 && !isdigit(digit)) |
| 2067 | || (base == 8 && (!isdigit(digit) || digit > '7')) |
| 2068 | || (base == 0 && !isdigit(digit))) |
| 2069 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2070 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2071 | switch (qualifier) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2072 | case 'H': /* that's 'hh' in format */ |
| 2073 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2074 | signed char *s = (signed char *)va_arg(args, signed char *); |
| 2075 | *s = (signed char)simple_strtol(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | } else { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2077 | unsigned char *s = (unsigned char *)va_arg(args, unsigned char *); |
| 2078 | *s = (unsigned char)simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2079 | } |
| 2080 | break; |
| 2081 | case 'h': |
| 2082 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2083 | short *s = (short *)va_arg(args, short *); |
| 2084 | *s = (short)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 short *s = (unsigned short *)va_arg(args, unsigned short *); |
| 2087 | *s = (unsigned short)simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2088 | } |
| 2089 | break; |
| 2090 | case 'l': |
| 2091 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2092 | long *l = (long *)va_arg(args, long *); |
| 2093 | *l = simple_strtol(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2094 | } else { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2095 | unsigned long *l = (unsigned long *)va_arg(args, unsigned long *); |
| 2096 | *l = simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2097 | } |
| 2098 | break; |
| 2099 | case 'L': |
| 2100 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2101 | long long *l = (long long *)va_arg(args, long long *); |
| 2102 | *l = simple_strtoll(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2103 | } else { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2104 | unsigned long long *l = (unsigned long long *)va_arg(args, unsigned long long *); |
| 2105 | *l = simple_strtoull(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2106 | } |
| 2107 | break; |
| 2108 | case 'Z': |
| 2109 | case 'z': |
| 2110 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2111 | size_t *s = (size_t *)va_arg(args, size_t *); |
| 2112 | *s = (size_t)simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2113 | } |
| 2114 | break; |
| 2115 | default: |
| 2116 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2117 | int *i = (int *)va_arg(args, int *); |
| 2118 | *i = (int)simple_strtol(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2119 | } else { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2120 | unsigned int *i = (unsigned int *)va_arg(args, unsigned int*); |
| 2121 | *i = (unsigned int)simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2122 | } |
| 2123 | break; |
| 2124 | } |
| 2125 | num++; |
| 2126 | |
| 2127 | if (!next) |
| 2128 | break; |
| 2129 | str = next; |
| 2130 | } |
Johannes Berg | c6b40d1 | 2007-05-08 00:27:20 -0700 | [diff] [blame] | 2131 | |
| 2132 | /* |
| 2133 | * Now we've come all the way through so either the input string or the |
| 2134 | * format ended. In the former case, there can be a %n at the current |
| 2135 | * position in the format that needs to be filled. |
| 2136 | */ |
| 2137 | if (*fmt == '%' && *(fmt + 1) == 'n') { |
| 2138 | int *p = (int *)va_arg(args, int *); |
| 2139 | *p = str - buf; |
| 2140 | } |
| 2141 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2142 | return num; |
| 2143 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2144 | EXPORT_SYMBOL(vsscanf); |
| 2145 | |
| 2146 | /** |
| 2147 | * sscanf - Unformat a buffer into a list of arguments |
| 2148 | * @buf: input buffer |
| 2149 | * @fmt: formatting of buffer |
| 2150 | * @...: resulting arguments |
| 2151 | */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2152 | int sscanf(const char *buf, const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2153 | { |
| 2154 | va_list args; |
| 2155 | int i; |
| 2156 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2157 | va_start(args, fmt); |
| 2158 | i = vsscanf(buf, fmt, args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2159 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2160 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2161 | return i; |
| 2162 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2163 | EXPORT_SYMBOL(sscanf); |