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 | |
Alexey Dobriyan | 1dff46d | 2011-10-31 17:12:28 -0700 | [diff] [blame] | 34 | #include "kstrtox.h" |
Harvey Harrison | aa46a63 | 2008-10-16 13:40:34 -0700 | [diff] [blame] | 35 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | * simple_strtoull - convert a string to an unsigned long long |
| 38 | * @cp: The start of the string |
| 39 | * @endp: A pointer to the end of the parsed string will be placed here |
| 40 | * @base: The number base to use |
| 41 | */ |
Harvey Harrison | 22d2705 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 42 | 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] | 43 | { |
Alexey Dobriyan | 1dff46d | 2011-10-31 17:12:28 -0700 | [diff] [blame] | 44 | unsigned long long result; |
| 45 | unsigned int rv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
Alexey Dobriyan | 1dff46d | 2011-10-31 17:12:28 -0700 | [diff] [blame] | 47 | cp = _parse_integer_fixup_radix(cp, &base); |
| 48 | rv = _parse_integer(cp, base, &result); |
| 49 | /* FIXME */ |
| 50 | cp += (rv & ~KSTRTOX_OVERFLOW); |
Harvey Harrison | aa46a63 | 2008-10-16 13:40:34 -0700 | [diff] [blame] | 51 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | if (endp) |
| 53 | *endp = (char *)cp; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | return result; |
| 56 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | EXPORT_SYMBOL(simple_strtoull); |
| 58 | |
| 59 | /** |
André Goddard Rosa | 922ac25 | 2009-12-14 18:01:01 -0800 | [diff] [blame] | 60 | * simple_strtoul - convert a string to an unsigned long |
| 61 | * @cp: The start of the string |
| 62 | * @endp: A pointer to the end of the parsed string will be placed here |
| 63 | * @base: The number base to use |
| 64 | */ |
| 65 | unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base) |
| 66 | { |
| 67 | return simple_strtoull(cp, endp, base); |
| 68 | } |
| 69 | EXPORT_SYMBOL(simple_strtoul); |
| 70 | |
| 71 | /** |
| 72 | * simple_strtol - convert a string to a signed long |
| 73 | * @cp: The start of the string |
| 74 | * @endp: A pointer to the end of the parsed string will be placed here |
| 75 | * @base: The number base to use |
| 76 | */ |
| 77 | long simple_strtol(const char *cp, char **endp, unsigned int base) |
| 78 | { |
| 79 | if (*cp == '-') |
| 80 | return -simple_strtoul(cp + 1, endp, base); |
| 81 | |
| 82 | return simple_strtoul(cp, endp, base); |
| 83 | } |
| 84 | EXPORT_SYMBOL(simple_strtol); |
| 85 | |
| 86 | /** |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | * simple_strtoll - convert a string to a signed long long |
| 88 | * @cp: The start of the string |
| 89 | * @endp: A pointer to the end of the parsed string will be placed here |
| 90 | * @base: The number base to use |
| 91 | */ |
Harvey Harrison | 22d2705 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 92 | long long simple_strtoll(const char *cp, char **endp, unsigned int base) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 94 | if (*cp == '-') |
Harvey Harrison | 22d2705 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 95 | return -simple_strtoull(cp + 1, endp, base); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 96 | |
Harvey Harrison | 22d2705 | 2008-10-16 13:40:35 -0700 | [diff] [blame] | 97 | return simple_strtoull(cp, endp, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | } |
Hans Verkuil | 98d5ce0 | 2010-04-23 13:18:04 -0400 | [diff] [blame] | 99 | EXPORT_SYMBOL(simple_strtoll); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 101 | static noinline_for_stack |
| 102 | int skip_atoi(const char **s) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 104 | int i = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
| 106 | while (isdigit(**s)) |
| 107 | i = i*10 + *((*s)++) - '0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | return i; |
| 110 | } |
| 111 | |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 112 | /* Decimal conversion is by far the most typical, and is used |
| 113 | * for /proc and /sys data. This directly impacts e.g. top performance |
| 114 | * with many processes running. We optimize it for speed |
| 115 | * using code from |
| 116 | * http://www.cs.uiowa.edu/~jones/bcd/decimal.html |
| 117 | * (with permission from the author, Douglas W. Jones). */ |
| 118 | |
| 119 | /* Formats correctly any integer in [0,99999]. |
| 120 | * Outputs from one to five digits depending on input. |
| 121 | * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 122 | static noinline_for_stack |
| 123 | char *put_dec_trunc(char *buf, unsigned q) |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 124 | { |
| 125 | unsigned d3, d2, d1, d0; |
| 126 | d1 = (q>>4) & 0xf; |
| 127 | d2 = (q>>8) & 0xf; |
| 128 | d3 = (q>>12); |
| 129 | |
| 130 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); |
| 131 | q = (d0 * 0xcd) >> 11; |
| 132 | d0 = d0 - 10*q; |
| 133 | *buf++ = d0 + '0'; /* least significant digit */ |
| 134 | d1 = q + 9*d3 + 5*d2 + d1; |
| 135 | if (d1 != 0) { |
| 136 | q = (d1 * 0xcd) >> 11; |
| 137 | d1 = d1 - 10*q; |
| 138 | *buf++ = d1 + '0'; /* next digit */ |
| 139 | |
| 140 | d2 = q + 2*d2; |
| 141 | if ((d2 != 0) || (d3 != 0)) { |
| 142 | q = (d2 * 0xd) >> 7; |
| 143 | d2 = d2 - 10*q; |
| 144 | *buf++ = d2 + '0'; /* next digit */ |
| 145 | |
| 146 | d3 = q + 4*d3; |
| 147 | if (d3 != 0) { |
| 148 | q = (d3 * 0xcd) >> 11; |
| 149 | d3 = d3 - 10*q; |
| 150 | *buf++ = d3 + '0'; /* next digit */ |
| 151 | if (q != 0) |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 152 | *buf++ = q + '0'; /* most sign. digit */ |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 153 | } |
| 154 | } |
| 155 | } |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 156 | |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 157 | return buf; |
| 158 | } |
| 159 | /* Same with if's removed. Always emits five digits */ |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 160 | static noinline_for_stack |
| 161 | char *put_dec_full(char *buf, unsigned q) |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 162 | { |
| 163 | /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ |
| 164 | /* but anyway, gcc produces better code with full-sized ints */ |
| 165 | unsigned d3, d2, d1, d0; |
| 166 | d1 = (q>>4) & 0xf; |
| 167 | d2 = (q>>8) & 0xf; |
| 168 | d3 = (q>>12); |
| 169 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 170 | /* |
| 171 | * Possible ways to approx. divide by 10 |
| 172 | * gcc -O2 replaces multiply with shifts and adds |
| 173 | * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) |
| 174 | * (x * 0x67) >> 10: 1100111 |
| 175 | * (x * 0x34) >> 9: 110100 - same |
| 176 | * (x * 0x1a) >> 8: 11010 - same |
| 177 | * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) |
| 178 | */ |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 179 | d0 = 6*(d3 + d2 + d1) + (q & 0xf); |
| 180 | q = (d0 * 0xcd) >> 11; |
| 181 | d0 = d0 - 10*q; |
| 182 | *buf++ = d0 + '0'; |
| 183 | d1 = q + 9*d3 + 5*d2 + d1; |
| 184 | q = (d1 * 0xcd) >> 11; |
| 185 | d1 = d1 - 10*q; |
| 186 | *buf++ = d1 + '0'; |
| 187 | |
| 188 | d2 = q + 2*d2; |
| 189 | q = (d2 * 0xd) >> 7; |
| 190 | d2 = d2 - 10*q; |
| 191 | *buf++ = d2 + '0'; |
| 192 | |
| 193 | d3 = q + 4*d3; |
| 194 | q = (d3 * 0xcd) >> 11; /* - shorter code */ |
| 195 | /* q = (d3 * 0x67) >> 10; - would also work */ |
| 196 | d3 = d3 - 10*q; |
| 197 | *buf++ = d3 + '0'; |
| 198 | *buf++ = q + '0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 199 | |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 200 | return buf; |
| 201 | } |
| 202 | /* No inlining helps gcc to use registers better */ |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 203 | static noinline_for_stack |
| 204 | char *put_dec(char *buf, unsigned long long num) |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 205 | { |
| 206 | while (1) { |
| 207 | unsigned rem; |
| 208 | if (num < 100000) |
| 209 | return put_dec_trunc(buf, num); |
| 210 | rem = do_div(num, 100000); |
| 211 | buf = put_dec_full(buf, rem); |
| 212 | } |
| 213 | } |
| 214 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | #define ZEROPAD 1 /* pad with zero */ |
| 216 | #define SIGN 2 /* unsigned/signed long */ |
| 217 | #define PLUS 4 /* show plus */ |
| 218 | #define SPACE 8 /* space if plus */ |
| 219 | #define LEFT 16 /* left justified */ |
Bjorn Helgaas | b89dc5d | 2010-03-05 10:47:31 -0700 | [diff] [blame] | 220 | #define SMALL 32 /* use lowercase in hex (must be 32 == 0x20) */ |
| 221 | #define SPECIAL 64 /* prefix hex with "0x", octal with "0" */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 223 | enum format_type { |
| 224 | FORMAT_TYPE_NONE, /* Just a string part */ |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 225 | FORMAT_TYPE_WIDTH, |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 226 | FORMAT_TYPE_PRECISION, |
| 227 | FORMAT_TYPE_CHAR, |
| 228 | FORMAT_TYPE_STR, |
| 229 | FORMAT_TYPE_PTR, |
| 230 | FORMAT_TYPE_PERCENT_CHAR, |
| 231 | FORMAT_TYPE_INVALID, |
| 232 | FORMAT_TYPE_LONG_LONG, |
| 233 | FORMAT_TYPE_ULONG, |
| 234 | FORMAT_TYPE_LONG, |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 235 | FORMAT_TYPE_UBYTE, |
| 236 | FORMAT_TYPE_BYTE, |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 237 | FORMAT_TYPE_USHORT, |
| 238 | FORMAT_TYPE_SHORT, |
| 239 | FORMAT_TYPE_UINT, |
| 240 | FORMAT_TYPE_INT, |
| 241 | FORMAT_TYPE_NRCHARS, |
| 242 | FORMAT_TYPE_SIZE_T, |
| 243 | FORMAT_TYPE_PTRDIFF |
| 244 | }; |
| 245 | |
| 246 | struct printf_spec { |
Joe Perches | 4e310fd | 2010-04-14 09:27:40 -0700 | [diff] [blame] | 247 | u8 type; /* format_type enum */ |
Joe Perches | ef0658f | 2010-03-06 17:10:14 -0800 | [diff] [blame] | 248 | u8 flags; /* flags to number() */ |
Joe Perches | 4e310fd | 2010-04-14 09:27:40 -0700 | [diff] [blame] | 249 | u8 base; /* number base, 8, 10 or 16 only */ |
| 250 | u8 qualifier; /* number qualifier, one of 'hHlLtzZ' */ |
| 251 | s16 field_width; /* width of output field */ |
| 252 | s16 precision; /* # of digits/chars */ |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 253 | }; |
| 254 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 255 | static noinline_for_stack |
| 256 | char *number(char *buf, char *end, unsigned long long num, |
| 257 | struct printf_spec spec) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | { |
Denys Vlasenko | 9b706ae | 2008-02-09 23:24:09 +0100 | [diff] [blame] | 259 | /* we are called with base 8, 10 or 16, only, thus don't need "G..." */ |
| 260 | static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */ |
| 261 | |
| 262 | char tmp[66]; |
| 263 | char sign; |
| 264 | char locase; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 265 | int need_pfx = ((spec.flags & SPECIAL) && spec.base != 10); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | int i; |
| 267 | |
Denys Vlasenko | 9b706ae | 2008-02-09 23:24:09 +0100 | [diff] [blame] | 268 | /* locase = 0 or 0x20. ORing digits or letters with 'locase' |
| 269 | * produces same digits or (maybe lowercased) letters */ |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 270 | locase = (spec.flags & SMALL); |
| 271 | if (spec.flags & LEFT) |
| 272 | spec.flags &= ~ZEROPAD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | sign = 0; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 274 | if (spec.flags & SIGN) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 275 | if ((signed long long)num < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | sign = '-'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 277 | num = -(signed long long)num; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 278 | spec.field_width--; |
| 279 | } else if (spec.flags & PLUS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | sign = '+'; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 281 | spec.field_width--; |
| 282 | } else if (spec.flags & SPACE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | sign = ' '; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 284 | spec.field_width--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | } |
| 286 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 287 | if (need_pfx) { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 288 | spec.field_width--; |
| 289 | if (spec.base == 16) |
| 290 | spec.field_width--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 292 | |
| 293 | /* generate full string in tmp[], in reverse order */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | i = 0; |
| 295 | if (num == 0) |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 296 | tmp[i++] = '0'; |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 297 | /* Generic code, for any base: |
| 298 | else do { |
Denys Vlasenko | 9b706ae | 2008-02-09 23:24:09 +0100 | [diff] [blame] | 299 | tmp[i++] = (digits[do_div(num,base)] | locase); |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 300 | } while (num != 0); |
| 301 | */ |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 302 | else if (spec.base != 10) { /* 8 or 16 */ |
| 303 | int mask = spec.base - 1; |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 304 | int shift = 3; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 305 | |
| 306 | if (spec.base == 16) |
| 307 | shift = 4; |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 308 | do { |
Denys Vlasenko | 9b706ae | 2008-02-09 23:24:09 +0100 | [diff] [blame] | 309 | tmp[i++] = (digits[((unsigned char)num) & mask] | locase); |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 310 | num >>= shift; |
| 311 | } while (num); |
Denis Vlasenko | 4277eed | 2007-07-15 23:41:56 -0700 | [diff] [blame] | 312 | } else { /* base 10 */ |
| 313 | i = put_dec(tmp, num) - tmp; |
| 314 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 315 | |
| 316 | /* printing 100 using %2d gives "100", not "00" */ |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 317 | if (i > spec.precision) |
| 318 | spec.precision = i; |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 319 | /* leading space padding */ |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 320 | spec.field_width -= spec.precision; |
| 321 | if (!(spec.flags & (ZEROPAD+LEFT))) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 322 | while (--spec.field_width >= 0) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 323 | if (buf < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | *buf = ' '; |
| 325 | ++buf; |
| 326 | } |
| 327 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 328 | /* sign */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | if (sign) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 330 | if (buf < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | *buf = sign; |
| 332 | ++buf; |
| 333 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 334 | /* "0x" / "0" prefix */ |
| 335 | if (need_pfx) { |
| 336 | if (buf < end) |
| 337 | *buf = '0'; |
| 338 | ++buf; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 339 | if (spec.base == 16) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 340 | if (buf < end) |
Denys Vlasenko | 9b706ae | 2008-02-09 23:24:09 +0100 | [diff] [blame] | 341 | *buf = ('X' | locase); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | ++buf; |
| 343 | } |
| 344 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 345 | /* zero or space padding */ |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 346 | if (!(spec.flags & LEFT)) { |
| 347 | char c = (spec.flags & ZEROPAD) ? '0' : ' '; |
| 348 | while (--spec.field_width >= 0) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 349 | if (buf < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | *buf = c; |
| 351 | ++buf; |
| 352 | } |
| 353 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 354 | /* hmm even more zero padding? */ |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 355 | while (i <= --spec.precision) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 356 | if (buf < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | *buf = '0'; |
| 358 | ++buf; |
| 359 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 360 | /* actual digits of result */ |
| 361 | while (--i >= 0) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 362 | if (buf < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | *buf = tmp[i]; |
| 364 | ++buf; |
| 365 | } |
Denis Vlasenko | b39a734 | 2007-07-15 23:41:54 -0700 | [diff] [blame] | 366 | /* trailing space padding */ |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 367 | while (--spec.field_width >= 0) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 368 | if (buf < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | *buf = ' '; |
| 370 | ++buf; |
| 371 | } |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 372 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | return buf; |
| 374 | } |
| 375 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 376 | static noinline_for_stack |
| 377 | 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] | 378 | { |
| 379 | int len, i; |
| 380 | |
| 381 | if ((unsigned long)s < PAGE_SIZE) |
André Goddard Rosa | 0f4f81d | 2009-12-14 18:00:55 -0800 | [diff] [blame] | 382 | s = "(null)"; |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 383 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 384 | len = strnlen(s, spec.precision); |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 385 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 386 | if (!(spec.flags & LEFT)) { |
| 387 | while (len < spec.field_width--) { |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 388 | if (buf < end) |
| 389 | *buf = ' '; |
| 390 | ++buf; |
| 391 | } |
| 392 | } |
| 393 | for (i = 0; i < len; ++i) { |
| 394 | if (buf < end) |
| 395 | *buf = *s; |
| 396 | ++buf; ++s; |
| 397 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 398 | while (len < spec.field_width--) { |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 399 | if (buf < end) |
| 400 | *buf = ' '; |
| 401 | ++buf; |
| 402 | } |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 403 | |
Linus Torvalds | 0f9bfa5 | 2008-07-06 16:06:25 -0700 | [diff] [blame] | 404 | return buf; |
| 405 | } |
| 406 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 407 | static noinline_for_stack |
| 408 | char *symbol_string(char *buf, char *end, void *ptr, |
| 409 | struct printf_spec spec, char ext) |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 410 | { |
| 411 | unsigned long value = (unsigned long) ptr; |
| 412 | #ifdef CONFIG_KALLSYMS |
| 413 | char sym[KSYM_SYMBOL_LEN]; |
Namhyung Kim | 0f77a8d | 2011-03-24 11:42:29 +0900 | [diff] [blame] | 414 | if (ext == 'B') |
| 415 | sprint_backtrace(sym, value); |
| 416 | else if (ext != 'f' && ext != 's') |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 417 | sprint_symbol(sym, value); |
| 418 | else |
| 419 | kallsyms_lookup(value, NULL, NULL, NULL, sym); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 420 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 421 | return string(buf, end, sym, spec); |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 422 | #else |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 423 | spec.field_width = 2 * sizeof(void *); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 424 | spec.flags |= SPECIAL | SMALL | ZEROPAD; |
| 425 | spec.base = 16; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 426 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 427 | return number(buf, end, value, spec); |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 428 | #endif |
| 429 | } |
| 430 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 431 | static noinline_for_stack |
| 432 | char *resource_string(char *buf, char *end, struct resource *res, |
| 433 | struct printf_spec spec, const char *fmt) |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 434 | { |
| 435 | #ifndef IO_RSRC_PRINTK_SIZE |
Bjorn Helgaas | 2840537 | 2009-10-06 15:33:29 -0600 | [diff] [blame] | 436 | #define IO_RSRC_PRINTK_SIZE 6 |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 437 | #endif |
| 438 | |
| 439 | #ifndef MEM_RSRC_PRINTK_SIZE |
Bjorn Helgaas | 2840537 | 2009-10-06 15:33:29 -0600 | [diff] [blame] | 440 | #define MEM_RSRC_PRINTK_SIZE 10 |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 441 | #endif |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 442 | static const struct printf_spec io_spec = { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 443 | .base = 16, |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 444 | .field_width = IO_RSRC_PRINTK_SIZE, |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 445 | .precision = -1, |
| 446 | .flags = SPECIAL | SMALL | ZEROPAD, |
| 447 | }; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 448 | static const struct printf_spec mem_spec = { |
| 449 | .base = 16, |
| 450 | .field_width = MEM_RSRC_PRINTK_SIZE, |
| 451 | .precision = -1, |
| 452 | .flags = SPECIAL | SMALL | ZEROPAD, |
| 453 | }; |
Bjorn Helgaas | 0f4050c | 2010-03-05 10:47:42 -0700 | [diff] [blame] | 454 | static const struct printf_spec bus_spec = { |
| 455 | .base = 16, |
| 456 | .field_width = 2, |
| 457 | .precision = -1, |
| 458 | .flags = SMALL | ZEROPAD, |
| 459 | }; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 460 | static const struct printf_spec dec_spec = { |
Bjorn Helgaas | c91d337 | 2009-10-06 15:33:34 -0600 | [diff] [blame] | 461 | .base = 10, |
| 462 | .precision = -1, |
| 463 | .flags = 0, |
| 464 | }; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 465 | static const struct printf_spec str_spec = { |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 466 | .field_width = -1, |
| 467 | .precision = 10, |
| 468 | .flags = LEFT, |
| 469 | }; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 470 | static const struct printf_spec flag_spec = { |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 471 | .base = 16, |
| 472 | .precision = -1, |
| 473 | .flags = SPECIAL | SMALL, |
| 474 | }; |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 475 | |
| 476 | /* 32-bit res (sizeof==4): 10 chars in dec, 10 in hex ("0x" + 8) |
| 477 | * 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */ |
| 478 | #define RSRC_BUF_SIZE ((2 * sizeof(resource_size_t)) + 4) |
| 479 | #define FLAG_BUF_SIZE (2 * sizeof(res->flags)) |
Bjorn Helgaas | 9d7cca0 | 2010-03-05 10:47:47 -0700 | [diff] [blame] | 480 | #define DECODED_BUF_SIZE sizeof("[mem - 64bit pref window disabled]") |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 481 | #define RAW_BUF_SIZE sizeof("[mem - flags 0x]") |
| 482 | char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE, |
| 483 | 2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)]; |
| 484 | |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 485 | char *p = sym, *pend = sym + sizeof(sym); |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 486 | int decode = (fmt[0] == 'R') ? 1 : 0; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 487 | const struct printf_spec *specp; |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 488 | |
| 489 | *p++ = '['; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 490 | if (res->flags & IORESOURCE_IO) { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 491 | p = string(p, pend, "io ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 492 | specp = &io_spec; |
| 493 | } else if (res->flags & IORESOURCE_MEM) { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 494 | p = string(p, pend, "mem ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 495 | specp = &mem_spec; |
| 496 | } else if (res->flags & IORESOURCE_IRQ) { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 497 | p = string(p, pend, "irq ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 498 | specp = &dec_spec; |
| 499 | } else if (res->flags & IORESOURCE_DMA) { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 500 | p = string(p, pend, "dma ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 501 | specp = &dec_spec; |
Bjorn Helgaas | 0f4050c | 2010-03-05 10:47:42 -0700 | [diff] [blame] | 502 | } else if (res->flags & IORESOURCE_BUS) { |
| 503 | p = string(p, pend, "bus ", str_spec); |
| 504 | specp = &bus_spec; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 505 | } else { |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 506 | p = string(p, pend, "??? ", str_spec); |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 507 | specp = &mem_spec; |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 508 | decode = 0; |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 509 | } |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 510 | p = number(p, pend, res->start, *specp); |
Bjorn Helgaas | c91d337 | 2009-10-06 15:33:34 -0600 | [diff] [blame] | 511 | if (res->start != res->end) { |
| 512 | *p++ = '-'; |
Bjorn Helgaas | 4da0b66 | 2010-03-05 10:47:37 -0700 | [diff] [blame] | 513 | p = number(p, pend, res->end, *specp); |
Bjorn Helgaas | c91d337 | 2009-10-06 15:33:34 -0600 | [diff] [blame] | 514 | } |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 515 | if (decode) { |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 516 | if (res->flags & IORESOURCE_MEM_64) |
| 517 | p = string(p, pend, " 64bit", str_spec); |
| 518 | if (res->flags & IORESOURCE_PREFETCH) |
| 519 | p = string(p, pend, " pref", str_spec); |
Bjorn Helgaas | 9d7cca0 | 2010-03-05 10:47:47 -0700 | [diff] [blame] | 520 | if (res->flags & IORESOURCE_WINDOW) |
| 521 | p = string(p, pend, " window", str_spec); |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 522 | if (res->flags & IORESOURCE_DISABLED) |
| 523 | p = string(p, pend, " disabled", str_spec); |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 524 | } else { |
| 525 | p = string(p, pend, " flags ", str_spec); |
| 526 | p = number(p, pend, res->flags, flag_spec); |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 527 | } |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 528 | *p++ = ']'; |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 529 | *p = '\0'; |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 530 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 531 | return string(buf, end, sym, spec); |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 532 | } |
| 533 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 534 | static noinline_for_stack |
| 535 | char *mac_address_string(char *buf, char *end, u8 *addr, |
| 536 | struct printf_spec spec, const char *fmt) |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 537 | { |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 538 | char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")]; |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 539 | char *p = mac_addr; |
| 540 | int i; |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 541 | char separator; |
| 542 | |
| 543 | if (fmt[1] == 'F') { /* FDDI canonical format */ |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 544 | separator = '-'; |
| 545 | } else { |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 546 | separator = ':'; |
| 547 | } |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 548 | |
| 549 | for (i = 0; i < 6; i++) { |
Andy Shevchenko | 55036ba | 2011-10-31 17:12:41 -0700 | [diff] [blame] | 550 | p = hex_byte_pack(p, addr[i]); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 551 | if (fmt[0] == 'M' && i != 5) |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 552 | *p++ = separator; |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 553 | } |
| 554 | *p = '\0'; |
| 555 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 556 | return string(buf, end, mac_addr, spec); |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 557 | } |
| 558 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 559 | static noinline_for_stack |
| 560 | char *ip4_string(char *p, const u8 *addr, const char *fmt) |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 561 | { |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 562 | int i; |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 563 | bool leading_zeros = (fmt[0] == 'i'); |
| 564 | int index; |
| 565 | int step; |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 566 | |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 567 | switch (fmt[2]) { |
| 568 | case 'h': |
| 569 | #ifdef __BIG_ENDIAN |
| 570 | index = 0; |
| 571 | step = 1; |
| 572 | #else |
| 573 | index = 3; |
| 574 | step = -1; |
| 575 | #endif |
| 576 | break; |
| 577 | case 'l': |
| 578 | index = 3; |
| 579 | step = -1; |
| 580 | break; |
| 581 | case 'n': |
| 582 | case 'b': |
| 583 | default: |
| 584 | index = 0; |
| 585 | step = 1; |
| 586 | break; |
| 587 | } |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 588 | for (i = 0; i < 4; i++) { |
| 589 | char temp[3]; /* hold each IP quad in reverse order */ |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 590 | int digits = put_dec_trunc(temp, addr[index]) - temp; |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 591 | if (leading_zeros) { |
| 592 | if (digits < 3) |
| 593 | *p++ = '0'; |
| 594 | if (digits < 2) |
| 595 | *p++ = '0'; |
| 596 | } |
| 597 | /* reverse the digits in the quad */ |
| 598 | while (digits--) |
| 599 | *p++ = temp[digits]; |
| 600 | if (i < 3) |
| 601 | *p++ = '.'; |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 602 | index += step; |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 603 | } |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 604 | *p = '\0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 605 | |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 606 | return p; |
| 607 | } |
| 608 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 609 | static noinline_for_stack |
| 610 | char *ip6_compressed_string(char *p, const char *addr) |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 611 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 612 | int i, j, range; |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 613 | unsigned char zerolength[8]; |
| 614 | int longest = 1; |
| 615 | int colonpos = -1; |
| 616 | u16 word; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 617 | u8 hi, lo; |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 618 | bool needcolon = false; |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 619 | bool useIPv4; |
| 620 | struct in6_addr in6; |
| 621 | |
| 622 | memcpy(&in6, addr, sizeof(struct in6_addr)); |
| 623 | |
| 624 | useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 625 | |
| 626 | memset(zerolength, 0, sizeof(zerolength)); |
| 627 | |
| 628 | if (useIPv4) |
| 629 | range = 6; |
| 630 | else |
| 631 | range = 8; |
| 632 | |
| 633 | /* find position of longest 0 run */ |
| 634 | for (i = 0; i < range; i++) { |
| 635 | for (j = i; j < range; j++) { |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 636 | if (in6.s6_addr16[j] != 0) |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 637 | break; |
| 638 | zerolength[i]++; |
| 639 | } |
| 640 | } |
| 641 | for (i = 0; i < range; i++) { |
| 642 | if (zerolength[i] > longest) { |
| 643 | longest = zerolength[i]; |
| 644 | colonpos = i; |
| 645 | } |
| 646 | } |
Joe Perches | 29cf519 | 2011-06-09 11:23:37 -0700 | [diff] [blame] | 647 | if (longest == 1) /* don't compress a single 0 */ |
| 648 | colonpos = -1; |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 649 | |
| 650 | /* emit address */ |
| 651 | for (i = 0; i < range; i++) { |
| 652 | if (i == colonpos) { |
| 653 | if (needcolon || i == 0) |
| 654 | *p++ = ':'; |
| 655 | *p++ = ':'; |
| 656 | needcolon = false; |
| 657 | i += longest - 1; |
| 658 | continue; |
| 659 | } |
| 660 | if (needcolon) { |
| 661 | *p++ = ':'; |
| 662 | needcolon = false; |
| 663 | } |
| 664 | /* hex u16 without leading 0s */ |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 665 | word = ntohs(in6.s6_addr16[i]); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 666 | hi = word >> 8; |
| 667 | lo = word & 0xff; |
| 668 | if (hi) { |
| 669 | if (hi > 0x0f) |
Andy Shevchenko | 55036ba | 2011-10-31 17:12:41 -0700 | [diff] [blame] | 670 | p = hex_byte_pack(p, hi); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 671 | else |
| 672 | *p++ = hex_asc_lo(hi); |
Andy Shevchenko | 55036ba | 2011-10-31 17:12:41 -0700 | [diff] [blame] | 673 | p = hex_byte_pack(p, lo); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 674 | } |
André Goddard Rosa | b5ff992 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 675 | else if (lo > 0x0f) |
Andy Shevchenko | 55036ba | 2011-10-31 17:12:41 -0700 | [diff] [blame] | 676 | p = hex_byte_pack(p, lo); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 677 | else |
| 678 | *p++ = hex_asc_lo(lo); |
| 679 | needcolon = true; |
| 680 | } |
| 681 | |
| 682 | if (useIPv4) { |
| 683 | if (needcolon) |
| 684 | *p++ = ':'; |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 685 | p = ip4_string(p, &in6.s6_addr[12], "I4"); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 686 | } |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 687 | *p = '\0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 688 | |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 689 | return p; |
| 690 | } |
| 691 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 692 | static noinline_for_stack |
| 693 | char *ip6_string(char *p, const char *addr, const char *fmt) |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 694 | { |
| 695 | int i; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 696 | |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 697 | for (i = 0; i < 8; i++) { |
Andy Shevchenko | 55036ba | 2011-10-31 17:12:41 -0700 | [diff] [blame] | 698 | p = hex_byte_pack(p, *addr++); |
| 699 | p = hex_byte_pack(p, *addr++); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 700 | if (fmt[0] == 'I' && i != 7) |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 701 | *p++ = ':'; |
| 702 | } |
| 703 | *p = '\0'; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 704 | |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 705 | return p; |
| 706 | } |
| 707 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 708 | static noinline_for_stack |
| 709 | char *ip6_addr_string(char *buf, char *end, const u8 *addr, |
| 710 | struct printf_spec spec, const char *fmt) |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 711 | { |
| 712 | char ip6_addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")]; |
| 713 | |
| 714 | if (fmt[0] == 'I' && fmt[2] == 'c') |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 715 | ip6_compressed_string(ip6_addr, addr); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 716 | else |
Joe Perches | eb78cd2 | 2009-09-18 13:04:06 +0000 | [diff] [blame] | 717 | ip6_string(ip6_addr, addr, fmt); |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 718 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 719 | return string(buf, end, ip6_addr, spec); |
Harvey Harrison | 689afa7 | 2008-10-28 16:04:44 -0700 | [diff] [blame] | 720 | } |
| 721 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 722 | static noinline_for_stack |
| 723 | char *ip4_addr_string(char *buf, char *end, const u8 *addr, |
| 724 | struct printf_spec spec, const char *fmt) |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 725 | { |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 726 | char ip4_addr[sizeof("255.255.255.255")]; |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 727 | |
Joe Perches | 0159f24 | 2010-01-13 20:23:30 -0800 | [diff] [blame] | 728 | ip4_string(ip4_addr, addr, fmt); |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 729 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 730 | return string(buf, end, ip4_addr, spec); |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 731 | } |
| 732 | |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 733 | static noinline_for_stack |
| 734 | char *uuid_string(char *buf, char *end, const u8 *addr, |
| 735 | struct printf_spec spec, const char *fmt) |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 736 | { |
| 737 | char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")]; |
| 738 | char *p = uuid; |
| 739 | int i; |
| 740 | static const u8 be[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; |
| 741 | static const u8 le[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15}; |
| 742 | const u8 *index = be; |
| 743 | bool uc = false; |
| 744 | |
| 745 | switch (*(++fmt)) { |
| 746 | case 'L': |
| 747 | uc = true; /* fall-through */ |
| 748 | case 'l': |
| 749 | index = le; |
| 750 | break; |
| 751 | case 'B': |
| 752 | uc = true; |
| 753 | break; |
| 754 | } |
| 755 | |
| 756 | for (i = 0; i < 16; i++) { |
Andy Shevchenko | 55036ba | 2011-10-31 17:12:41 -0700 | [diff] [blame] | 757 | p = hex_byte_pack(p, addr[index[i]]); |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 758 | switch (i) { |
| 759 | case 3: |
| 760 | case 5: |
| 761 | case 7: |
| 762 | case 9: |
| 763 | *p++ = '-'; |
| 764 | break; |
| 765 | } |
| 766 | } |
| 767 | |
| 768 | *p = 0; |
| 769 | |
| 770 | if (uc) { |
| 771 | p = uuid; |
| 772 | do { |
| 773 | *p = toupper(*p); |
| 774 | } while (*(++p)); |
| 775 | } |
| 776 | |
| 777 | return string(buf, end, uuid, spec); |
| 778 | } |
| 779 | |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 780 | static |
| 781 | char *netdev_feature_string(char *buf, char *end, const u8 *addr, |
| 782 | struct printf_spec spec) |
| 783 | { |
| 784 | spec.flags |= SPECIAL | SMALL | ZEROPAD; |
| 785 | if (spec.field_width == -1) |
| 786 | spec.field_width = 2 + 2 * sizeof(netdev_features_t); |
| 787 | spec.base = 16; |
| 788 | |
| 789 | return number(buf, end, *(const netdev_features_t *)addr, spec); |
| 790 | } |
| 791 | |
Ingo Molnar | 411f05f | 2011-05-12 23:00:28 +0200 | [diff] [blame] | 792 | int kptr_restrict __read_mostly; |
Dan Rosenberg | 455cd5a | 2011-01-12 16:59:41 -0800 | [diff] [blame] | 793 | |
Linus Torvalds | 4d8a743 | 2008-07-06 16:24:57 -0700 | [diff] [blame] | 794 | /* |
| 795 | * Show a '%p' thing. A kernel extension is that the '%p' is followed |
| 796 | * by an extra set of alphanumeric characters that are extended format |
| 797 | * specifiers. |
| 798 | * |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 799 | * Right now we handle: |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 800 | * |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 801 | * - 'F' For symbolic function descriptor pointers with offset |
| 802 | * - 'f' For simple symbolic function names without offset |
Steven Rostedt | 0efb4d2 | 2009-09-17 09:27:29 -0400 | [diff] [blame] | 803 | * - 'S' For symbolic direct pointers with offset |
| 804 | * - 's' For symbolic direct pointers without offset |
Namhyung Kim | 0f77a8d | 2011-03-24 11:42:29 +0900 | [diff] [blame] | 805 | * - 'B' For backtraced symbolic direct pointers with offset |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 806 | * - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref] |
| 807 | * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201] |
Harvey Harrison | dd45c9c | 2008-10-27 15:47:12 -0700 | [diff] [blame] | 808 | * - 'M' For a 6-byte MAC address, it prints the address in the |
| 809 | * usual colon-separated hex notation |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 810 | * - '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] | 811 | * - 'MF' For a 6-byte MAC FDDI address, it prints the address |
Joe Perches | c8e0006 | 2010-01-11 00:44:14 -0800 | [diff] [blame] | 812 | * with a dash-separated hex notation |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 813 | * - 'I' [46] for IPv4/IPv6 addresses printed in the usual way |
| 814 | * IPv4 uses dot-separated decimal without leading 0's (1.2.3.4) |
| 815 | * IPv6 uses colon separated network-order 16 bit hex with leading 0's |
| 816 | * - 'i' [46] for 'raw' IPv4/IPv6 addresses |
| 817 | * IPv6 omits the colons (01020304...0f) |
| 818 | * 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] | 819 | * - '[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] | 820 | * - 'I6c' for IPv6 addresses printed as specified by |
Joe Perches | 29cf519 | 2011-06-09 11:23:37 -0700 | [diff] [blame] | 821 | * http://tools.ietf.org/html/rfc5952 |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 822 | * - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form |
| 823 | * "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" |
| 824 | * Options for %pU are: |
| 825 | * b big endian lower case hex (default) |
| 826 | * B big endian UPPER case hex |
| 827 | * l little endian lower case hex |
| 828 | * L little endian UPPER case hex |
| 829 | * big endian output byte order is: |
| 830 | * [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15] |
| 831 | * little endian output byte order is: |
| 832 | * [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] | 833 | * - 'V' For a struct va_format which contains a format string * and va_list *, |
| 834 | * call vsnprintf(->format, *->va_list). |
| 835 | * Implements a "recursive vsnprintf". |
| 836 | * Do not use this feature without some mechanism to verify the |
| 837 | * correctness of the format string and va_list arguments. |
Dan Rosenberg | 455cd5a | 2011-01-12 16:59:41 -0800 | [diff] [blame] | 838 | * - 'K' For a kernel pointer that should be hidden from unprivileged users |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 839 | * - 'NF' For a netdev_features_t |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 840 | * |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 841 | * Note: The difference between 'S' and 'F' is that on ia64 and ppc64 |
| 842 | * function pointers are really function descriptors, which contain a |
| 843 | * pointer to the real address. |
Linus Torvalds | 4d8a743 | 2008-07-06 16:24:57 -0700 | [diff] [blame] | 844 | */ |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 845 | static noinline_for_stack |
| 846 | char *pointer(const char *fmt, char *buf, char *end, void *ptr, |
| 847 | struct printf_spec spec) |
Linus Torvalds | 78a8bf6 | 2008-07-06 16:16:15 -0700 | [diff] [blame] | 848 | { |
Kees Cook | 9f36e2c | 2011-03-22 16:34:22 -0700 | [diff] [blame] | 849 | if (!ptr && *fmt != 'K') { |
Joe Perches | 5e05798 | 2010-10-26 14:22:50 -0700 | [diff] [blame] | 850 | /* |
| 851 | * Print (null) with the same width as a pointer so it makes |
| 852 | * tabular output look nice. |
| 853 | */ |
| 854 | if (spec.field_width == -1) |
| 855 | spec.field_width = 2 * sizeof(void *); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 856 | return string(buf, end, "(null)", spec); |
Joe Perches | 5e05798 | 2010-10-26 14:22:50 -0700 | [diff] [blame] | 857 | } |
Linus Torvalds | d97106a | 2009-01-03 11:46:17 -0800 | [diff] [blame] | 858 | |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 859 | switch (*fmt) { |
| 860 | case 'F': |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 861 | case 'f': |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 862 | ptr = dereference_function_descriptor(ptr); |
| 863 | /* Fallthrough */ |
| 864 | case 'S': |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 865 | case 's': |
Namhyung Kim | 0f77a8d | 2011-03-24 11:42:29 +0900 | [diff] [blame] | 866 | case 'B': |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 867 | return symbol_string(buf, end, ptr, spec, *fmt); |
Linus Torvalds | 332d2e7 | 2008-10-20 15:07:34 +1100 | [diff] [blame] | 868 | case 'R': |
Bjorn Helgaas | c7dabef | 2009-10-27 13:26:47 -0600 | [diff] [blame] | 869 | case 'r': |
Bjorn Helgaas | fd95541 | 2009-10-06 15:33:39 -0600 | [diff] [blame] | 870 | return resource_string(buf, end, ptr, spec, fmt); |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 871 | case 'M': /* Colon separated: 00:01:02:03:04:05 */ |
| 872 | case 'm': /* Contiguous: 000102030405 */ |
Joe Perches | bc7259a | 2010-01-07 11:43:50 +0000 | [diff] [blame] | 873 | /* [mM]F (FDDI, bit reversed) */ |
Joe Perches | 8a27f7c | 2009-08-17 12:29:44 +0000 | [diff] [blame] | 874 | return mac_address_string(buf, end, ptr, spec, fmt); |
| 875 | case 'I': /* Formatted IP supported |
| 876 | * 4: 1.2.3.4 |
| 877 | * 6: 0001:0203:...:0708 |
| 878 | * 6c: 1::708 or 1::1.2.3.4 |
| 879 | */ |
| 880 | case 'i': /* Contiguous: |
| 881 | * 4: 001.002.003.004 |
| 882 | * 6: 000102...0f |
| 883 | */ |
| 884 | switch (fmt[1]) { |
| 885 | case '6': |
| 886 | return ip6_addr_string(buf, end, ptr, spec, fmt); |
| 887 | case '4': |
| 888 | return ip4_addr_string(buf, end, ptr, spec, fmt); |
| 889 | } |
Harvey Harrison | 4aa9960 | 2008-10-29 12:49:58 -0700 | [diff] [blame] | 890 | break; |
Joe Perches | 9ac6e44 | 2009-12-14 18:01:09 -0800 | [diff] [blame] | 891 | case 'U': |
| 892 | return uuid_string(buf, end, ptr, spec, fmt); |
Joe Perches | 7db6f5f | 2010-06-27 01:02:33 +0000 | [diff] [blame] | 893 | case 'V': |
Jan Beulich | 5756b76 | 2012-03-05 16:49:24 +0000 | [diff] [blame] | 894 | { |
| 895 | va_list va; |
| 896 | |
| 897 | va_copy(va, *((struct va_format *)ptr)->va); |
| 898 | buf += vsnprintf(buf, end > buf ? end - buf : 0, |
| 899 | ((struct va_format *)ptr)->fmt, va); |
| 900 | va_end(va); |
| 901 | return buf; |
| 902 | } |
Dan Rosenberg | 455cd5a | 2011-01-12 16:59:41 -0800 | [diff] [blame] | 903 | case 'K': |
| 904 | /* |
| 905 | * %pK cannot be used in IRQ context because its test |
| 906 | * for CAP_SYSLOG would be meaningless. |
| 907 | */ |
| 908 | if (in_irq() || in_serving_softirq() || in_nmi()) { |
| 909 | if (spec.field_width == -1) |
| 910 | spec.field_width = 2 * sizeof(void *); |
| 911 | return string(buf, end, "pK-error", spec); |
Dan Rosenberg | 455cd5a | 2011-01-12 16:59:41 -0800 | [diff] [blame] | 912 | } |
Joe Perches | 2629760 | 2011-03-22 16:34:19 -0700 | [diff] [blame] | 913 | if (!((kptr_restrict == 0) || |
| 914 | (kptr_restrict == 1 && |
| 915 | has_capability_noaudit(current, CAP_SYSLOG)))) |
| 916 | ptr = NULL; |
| 917 | break; |
Michał Mirosław | c8f44af | 2011-11-15 15:29:55 +0000 | [diff] [blame] | 918 | case 'N': |
| 919 | switch (fmt[1]) { |
| 920 | case 'F': |
| 921 | return netdev_feature_string(buf, end, ptr, spec); |
| 922 | } |
| 923 | break; |
Linus Torvalds | 0fe1ef2 | 2008-07-06 16:43:12 -0700 | [diff] [blame] | 924 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 925 | spec.flags |= SMALL; |
| 926 | if (spec.field_width == -1) { |
Joe Perches | 5e05798 | 2010-10-26 14:22:50 -0700 | [diff] [blame] | 927 | spec.field_width = 2 * sizeof(void *); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 928 | spec.flags |= ZEROPAD; |
Linus Torvalds | 78a8bf6 | 2008-07-06 16:16:15 -0700 | [diff] [blame] | 929 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 930 | spec.base = 16; |
| 931 | |
| 932 | return number(buf, end, (unsigned long) ptr, spec); |
| 933 | } |
| 934 | |
| 935 | /* |
| 936 | * Helper function to decode printf style format. |
| 937 | * Each call decode a token from the format and return the |
| 938 | * number of characters read (or likely the delta where it wants |
| 939 | * to go on the next call). |
| 940 | * The decoded token is returned through the parameters |
| 941 | * |
| 942 | * 'h', 'l', or 'L' for integer fields |
| 943 | * 'z' support added 23/7/1999 S.H. |
| 944 | * 'z' changed to 'Z' --davidm 1/25/99 |
| 945 | * 't' added for ptrdiff_t |
| 946 | * |
| 947 | * @fmt: the format string |
| 948 | * @type of the token returned |
| 949 | * @flags: various flags such as +, -, # tokens.. |
| 950 | * @field_width: overwritten width |
| 951 | * @base: base of the number (octal, hex, ...) |
| 952 | * @precision: precision of a number |
| 953 | * @qualifier: qualifier of a number (long, size_t, ...) |
| 954 | */ |
Joe Perches | cf3b429 | 2010-05-24 14:33:16 -0700 | [diff] [blame] | 955 | static noinline_for_stack |
| 956 | int format_decode(const char *fmt, struct printf_spec *spec) |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 957 | { |
| 958 | const char *start = fmt; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 959 | |
| 960 | /* we finished early by reading the field width */ |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 961 | if (spec->type == FORMAT_TYPE_WIDTH) { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 962 | if (spec->field_width < 0) { |
| 963 | spec->field_width = -spec->field_width; |
| 964 | spec->flags |= LEFT; |
| 965 | } |
| 966 | spec->type = FORMAT_TYPE_NONE; |
| 967 | goto precision; |
| 968 | } |
| 969 | |
| 970 | /* we finished early by reading the precision */ |
| 971 | if (spec->type == FORMAT_TYPE_PRECISION) { |
| 972 | if (spec->precision < 0) |
| 973 | spec->precision = 0; |
| 974 | |
| 975 | spec->type = FORMAT_TYPE_NONE; |
| 976 | goto qualifier; |
| 977 | } |
| 978 | |
| 979 | /* By default */ |
| 980 | spec->type = FORMAT_TYPE_NONE; |
| 981 | |
| 982 | for (; *fmt ; ++fmt) { |
| 983 | if (*fmt == '%') |
| 984 | break; |
| 985 | } |
| 986 | |
| 987 | /* Return the current non-format string */ |
| 988 | if (fmt != start || !*fmt) |
| 989 | return fmt - start; |
| 990 | |
| 991 | /* Process flags */ |
| 992 | spec->flags = 0; |
| 993 | |
| 994 | while (1) { /* this also skips first '%' */ |
| 995 | bool found = true; |
| 996 | |
| 997 | ++fmt; |
| 998 | |
| 999 | switch (*fmt) { |
| 1000 | case '-': spec->flags |= LEFT; break; |
| 1001 | case '+': spec->flags |= PLUS; break; |
| 1002 | case ' ': spec->flags |= SPACE; break; |
| 1003 | case '#': spec->flags |= SPECIAL; break; |
| 1004 | case '0': spec->flags |= ZEROPAD; break; |
| 1005 | default: found = false; |
| 1006 | } |
| 1007 | |
| 1008 | if (!found) |
| 1009 | break; |
| 1010 | } |
| 1011 | |
| 1012 | /* get field width */ |
| 1013 | spec->field_width = -1; |
| 1014 | |
| 1015 | if (isdigit(*fmt)) |
| 1016 | spec->field_width = skip_atoi(&fmt); |
| 1017 | else if (*fmt == '*') { |
| 1018 | /* it's the next argument */ |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1019 | spec->type = FORMAT_TYPE_WIDTH; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1020 | return ++fmt - start; |
| 1021 | } |
| 1022 | |
| 1023 | precision: |
| 1024 | /* get the precision */ |
| 1025 | spec->precision = -1; |
| 1026 | if (*fmt == '.') { |
| 1027 | ++fmt; |
| 1028 | if (isdigit(*fmt)) { |
| 1029 | spec->precision = skip_atoi(&fmt); |
| 1030 | if (spec->precision < 0) |
| 1031 | spec->precision = 0; |
| 1032 | } else if (*fmt == '*') { |
| 1033 | /* it's the next argument */ |
Vegard Nossum | adf26f8 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1034 | spec->type = FORMAT_TYPE_PRECISION; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1035 | return ++fmt - start; |
| 1036 | } |
| 1037 | } |
| 1038 | |
| 1039 | qualifier: |
| 1040 | /* get the conversion qualifier */ |
| 1041 | spec->qualifier = -1; |
Andy Shevchenko | 75fb8f2 | 2011-07-25 17:13:20 -0700 | [diff] [blame] | 1042 | if (*fmt == 'h' || _tolower(*fmt) == 'l' || |
| 1043 | _tolower(*fmt) == 'z' || *fmt == 't') { |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1044 | spec->qualifier = *fmt++; |
| 1045 | if (unlikely(spec->qualifier == *fmt)) { |
| 1046 | if (spec->qualifier == 'l') { |
| 1047 | spec->qualifier = 'L'; |
| 1048 | ++fmt; |
| 1049 | } else if (spec->qualifier == 'h') { |
| 1050 | spec->qualifier = 'H'; |
| 1051 | ++fmt; |
| 1052 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1053 | } |
| 1054 | } |
| 1055 | |
| 1056 | /* default base */ |
| 1057 | spec->base = 10; |
| 1058 | switch (*fmt) { |
| 1059 | case 'c': |
| 1060 | spec->type = FORMAT_TYPE_CHAR; |
| 1061 | return ++fmt - start; |
| 1062 | |
| 1063 | case 's': |
| 1064 | spec->type = FORMAT_TYPE_STR; |
| 1065 | return ++fmt - start; |
| 1066 | |
| 1067 | case 'p': |
| 1068 | spec->type = FORMAT_TYPE_PTR; |
| 1069 | return fmt - start; |
| 1070 | /* skip alnum */ |
| 1071 | |
| 1072 | case 'n': |
| 1073 | spec->type = FORMAT_TYPE_NRCHARS; |
| 1074 | return ++fmt - start; |
| 1075 | |
| 1076 | case '%': |
| 1077 | spec->type = FORMAT_TYPE_PERCENT_CHAR; |
| 1078 | return ++fmt - start; |
| 1079 | |
| 1080 | /* integer number formats - set up the flags and "break" */ |
| 1081 | case 'o': |
| 1082 | spec->base = 8; |
| 1083 | break; |
| 1084 | |
| 1085 | case 'x': |
| 1086 | spec->flags |= SMALL; |
| 1087 | |
| 1088 | case 'X': |
| 1089 | spec->base = 16; |
| 1090 | break; |
| 1091 | |
| 1092 | case 'd': |
| 1093 | case 'i': |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1094 | spec->flags |= SIGN; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1095 | case 'u': |
| 1096 | break; |
| 1097 | |
| 1098 | default: |
| 1099 | spec->type = FORMAT_TYPE_INVALID; |
| 1100 | return fmt - start; |
| 1101 | } |
| 1102 | |
| 1103 | if (spec->qualifier == 'L') |
| 1104 | spec->type = FORMAT_TYPE_LONG_LONG; |
| 1105 | else if (spec->qualifier == 'l') { |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1106 | if (spec->flags & SIGN) |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1107 | spec->type = FORMAT_TYPE_LONG; |
| 1108 | else |
| 1109 | spec->type = FORMAT_TYPE_ULONG; |
Andy Shevchenko | 75fb8f2 | 2011-07-25 17:13:20 -0700 | [diff] [blame] | 1110 | } else if (_tolower(spec->qualifier) == 'z') { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1111 | spec->type = FORMAT_TYPE_SIZE_T; |
| 1112 | } else if (spec->qualifier == 't') { |
| 1113 | spec->type = FORMAT_TYPE_PTRDIFF; |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1114 | } else if (spec->qualifier == 'H') { |
| 1115 | if (spec->flags & SIGN) |
| 1116 | spec->type = FORMAT_TYPE_BYTE; |
| 1117 | else |
| 1118 | spec->type = FORMAT_TYPE_UBYTE; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1119 | } else if (spec->qualifier == 'h') { |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1120 | if (spec->flags & SIGN) |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1121 | spec->type = FORMAT_TYPE_SHORT; |
| 1122 | else |
| 1123 | spec->type = FORMAT_TYPE_USHORT; |
| 1124 | } else { |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1125 | if (spec->flags & SIGN) |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1126 | spec->type = FORMAT_TYPE_INT; |
| 1127 | else |
| 1128 | spec->type = FORMAT_TYPE_UINT; |
| 1129 | } |
| 1130 | |
| 1131 | return ++fmt - start; |
Linus Torvalds | 78a8bf6 | 2008-07-06 16:16:15 -0700 | [diff] [blame] | 1132 | } |
| 1133 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1134 | /** |
| 1135 | * vsnprintf - Format a string and place it in a buffer |
| 1136 | * @buf: The buffer to place the result into |
| 1137 | * @size: The size of the buffer, including the trailing null space |
| 1138 | * @fmt: The format string to use |
| 1139 | * @args: Arguments for the format string |
| 1140 | * |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1141 | * This function follows C99 vsnprintf, but has some extensions: |
Steven Rostedt | 91adcd2 | 2009-09-16 20:03:06 -0400 | [diff] [blame] | 1142 | * %pS output the name of a text symbol with offset |
| 1143 | * %ps output the name of a text symbol without offset |
Frederic Weisbecker | 0c8b946 | 2009-04-15 17:48:18 +0200 | [diff] [blame] | 1144 | * %pF output the name of a function pointer with its offset |
| 1145 | * %pf output the name of a function pointer without its offset |
Namhyung Kim | 0f77a8d | 2011-03-24 11:42:29 +0900 | [diff] [blame] | 1146 | * %pB output the name of a backtrace symbol with its offset |
Uwe Kleine-König | 8a79503 | 2009-12-17 15:27:12 -0800 | [diff] [blame] | 1147 | * %pR output the address range in a struct resource with decoded flags |
| 1148 | * %pr output the address range in a struct resource with raw flags |
| 1149 | * %pM output a 6-byte MAC address with colons |
| 1150 | * %pm output a 6-byte MAC address without colons |
| 1151 | * %pI4 print an IPv4 address without leading zeros |
| 1152 | * %pi4 print an IPv4 address with leading zeros |
| 1153 | * %pI6 print an IPv6 address with colons |
| 1154 | * %pi6 print an IPv6 address without colons |
Jan Engelhardt | f996f20 | 2011-07-14 18:48:56 +0200 | [diff] [blame] | 1155 | * %pI6c print an IPv6 address as specified by RFC 5952 |
Uwe Kleine-König | 8a79503 | 2009-12-17 15:27:12 -0800 | [diff] [blame] | 1156 | * %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper |
| 1157 | * case. |
Steven Rostedt | 0efb4d2 | 2009-09-17 09:27:29 -0400 | [diff] [blame] | 1158 | * %n is ignored |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1159 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1160 | * The return value is the number of characters which would |
| 1161 | * be generated for the given input, excluding the trailing |
| 1162 | * '\0', as per ISO C99. If you want to have the exact |
| 1163 | * number of characters written into @buf as return value |
Robert P. J. Day | 72fd4a3 | 2007-02-10 01:45:59 -0800 | [diff] [blame] | 1164 | * (not including the trailing '\0'), use vscnprintf(). If the |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | * return is greater than or equal to @size, the resulting |
| 1166 | * string is truncated. |
| 1167 | * |
Uwe Kleine-König | ba1835e | 2011-04-06 07:49:04 -0700 | [diff] [blame] | 1168 | * If you're not already dealing with a va_list consider using snprintf(). |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1169 | */ |
| 1170 | int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) |
| 1171 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | unsigned long long num; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1173 | char *str, *end; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1174 | struct printf_spec spec = {0}; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1176 | /* Reject out-of-range values early. Large positive sizes are |
| 1177 | used for unknown buffer sizes. */ |
Marcin Slusarz | 2f30b1f9 | 2009-09-21 17:04:29 -0700 | [diff] [blame] | 1178 | if (WARN_ON_ONCE((int) size < 0)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1180 | |
| 1181 | str = buf; |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1182 | end = buf + size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1183 | |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1184 | /* Make sure end is always >= buf */ |
| 1185 | if (end < buf) { |
| 1186 | end = ((void *)-1); |
| 1187 | size = end - buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | } |
| 1189 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1190 | while (*fmt) { |
| 1191 | const char *old_fmt = fmt; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1192 | int read = format_decode(fmt, &spec); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1193 | |
| 1194 | fmt += read; |
| 1195 | |
| 1196 | switch (spec.type) { |
| 1197 | case FORMAT_TYPE_NONE: { |
| 1198 | int copy = read; |
| 1199 | if (str < end) { |
| 1200 | if (copy > end - str) |
| 1201 | copy = end - str; |
| 1202 | memcpy(str, old_fmt, copy); |
| 1203 | } |
| 1204 | str += read; |
| 1205 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1206 | } |
| 1207 | |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1208 | case FORMAT_TYPE_WIDTH: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1209 | spec.field_width = va_arg(args, int); |
| 1210 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1211 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1212 | case FORMAT_TYPE_PRECISION: |
| 1213 | spec.precision = va_arg(args, int); |
| 1214 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1216 | case FORMAT_TYPE_CHAR: { |
| 1217 | char c; |
| 1218 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1219 | if (!(spec.flags & LEFT)) { |
| 1220 | while (--spec.field_width > 0) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1221 | if (str < end) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1222 | *str = ' '; |
| 1223 | ++str; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1224 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1225 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1226 | } |
| 1227 | c = (unsigned char) va_arg(args, int); |
| 1228 | if (str < end) |
| 1229 | *str = c; |
| 1230 | ++str; |
| 1231 | while (--spec.field_width > 0) { |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1232 | if (str < end) |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1233 | *str = ' '; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1234 | ++str; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1235 | } |
| 1236 | break; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1237 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1239 | case FORMAT_TYPE_STR: |
| 1240 | str = string(str, end, va_arg(args, char *), spec); |
| 1241 | break; |
| 1242 | |
| 1243 | case FORMAT_TYPE_PTR: |
| 1244 | str = pointer(fmt+1, str, end, va_arg(args, void *), |
| 1245 | spec); |
| 1246 | while (isalnum(*fmt)) |
| 1247 | fmt++; |
| 1248 | break; |
| 1249 | |
| 1250 | case FORMAT_TYPE_PERCENT_CHAR: |
| 1251 | if (str < end) |
| 1252 | *str = '%'; |
| 1253 | ++str; |
| 1254 | break; |
| 1255 | |
| 1256 | case FORMAT_TYPE_INVALID: |
| 1257 | if (str < end) |
| 1258 | *str = '%'; |
| 1259 | ++str; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1260 | break; |
| 1261 | |
| 1262 | case FORMAT_TYPE_NRCHARS: { |
Joe Perches | ef0658f | 2010-03-06 17:10:14 -0800 | [diff] [blame] | 1263 | u8 qualifier = spec.qualifier; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1264 | |
| 1265 | if (qualifier == 'l') { |
| 1266 | long *ip = va_arg(args, long *); |
| 1267 | *ip = (str - buf); |
Andy Shevchenko | 75fb8f2 | 2011-07-25 17:13:20 -0700 | [diff] [blame] | 1268 | } else if (_tolower(qualifier) == 'z') { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1269 | size_t *ip = va_arg(args, size_t *); |
| 1270 | *ip = (str - buf); |
| 1271 | } else { |
| 1272 | int *ip = va_arg(args, int *); |
| 1273 | *ip = (str - buf); |
| 1274 | } |
| 1275 | break; |
| 1276 | } |
| 1277 | |
| 1278 | default: |
| 1279 | switch (spec.type) { |
| 1280 | case FORMAT_TYPE_LONG_LONG: |
| 1281 | num = va_arg(args, long long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | break; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1283 | case FORMAT_TYPE_ULONG: |
| 1284 | num = va_arg(args, unsigned long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | break; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1286 | case FORMAT_TYPE_LONG: |
| 1287 | num = va_arg(args, long); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1288 | break; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1289 | case FORMAT_TYPE_SIZE_T: |
| 1290 | num = va_arg(args, size_t); |
| 1291 | break; |
| 1292 | case FORMAT_TYPE_PTRDIFF: |
| 1293 | num = va_arg(args, ptrdiff_t); |
| 1294 | break; |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1295 | case FORMAT_TYPE_UBYTE: |
| 1296 | num = (unsigned char) va_arg(args, int); |
| 1297 | break; |
| 1298 | case FORMAT_TYPE_BYTE: |
| 1299 | num = (signed char) va_arg(args, int); |
| 1300 | break; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1301 | case FORMAT_TYPE_USHORT: |
| 1302 | num = (unsigned short) va_arg(args, int); |
| 1303 | break; |
| 1304 | case FORMAT_TYPE_SHORT: |
| 1305 | num = (short) va_arg(args, int); |
| 1306 | break; |
Frederic Weisbecker | 39e874f | 2009-03-09 21:15:04 +0100 | [diff] [blame] | 1307 | case FORMAT_TYPE_INT: |
| 1308 | num = (int) va_arg(args, int); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1309 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | default: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1311 | num = va_arg(args, unsigned int); |
| 1312 | } |
| 1313 | |
| 1314 | str = number(str, end, num, spec); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1317 | |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1318 | if (size > 0) { |
| 1319 | if (str < end) |
| 1320 | *str = '\0'; |
| 1321 | else |
Linus Torvalds | 0a6047e | 2006-06-28 17:09:34 -0700 | [diff] [blame] | 1322 | end[-1] = '\0'; |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1323 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1324 | |
Jeremy Fitzhardinge | f796937 | 2006-06-25 05:49:17 -0700 | [diff] [blame] | 1325 | /* the trailing null byte doesn't count towards the total */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1326 | return str-buf; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1328 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1329 | EXPORT_SYMBOL(vsnprintf); |
| 1330 | |
| 1331 | /** |
| 1332 | * vscnprintf - Format a string and place it in a buffer |
| 1333 | * @buf: The buffer to place the result into |
| 1334 | * @size: The size of the buffer, including the trailing null space |
| 1335 | * @fmt: The format string to use |
| 1336 | * @args: Arguments for the format string |
| 1337 | * |
| 1338 | * The return value is the number of characters which have been written into |
Anton Arapov | b921c69 | 2011-01-12 16:59:49 -0800 | [diff] [blame] | 1339 | * the @buf not including the trailing '\0'. If @size is == 0 the function |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | * returns 0. |
| 1341 | * |
Uwe Kleine-König | ba1835e | 2011-04-06 07:49:04 -0700 | [diff] [blame] | 1342 | * If you're not already dealing with a va_list consider using scnprintf(). |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1343 | * |
| 1344 | * See the vsnprintf() documentation for format string extensions over C99. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | */ |
| 1346 | int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) |
| 1347 | { |
| 1348 | int i; |
| 1349 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1350 | i = vsnprintf(buf, size, fmt, args); |
| 1351 | |
Anton Arapov | b921c69 | 2011-01-12 16:59:49 -0800 | [diff] [blame] | 1352 | if (likely(i < size)) |
| 1353 | return i; |
| 1354 | if (size != 0) |
| 1355 | return size - 1; |
| 1356 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1357 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1358 | EXPORT_SYMBOL(vscnprintf); |
| 1359 | |
| 1360 | /** |
| 1361 | * snprintf - Format a string and place it in a buffer |
| 1362 | * @buf: The buffer to place the result into |
| 1363 | * @size: The size of the buffer, including the trailing null space |
| 1364 | * @fmt: The format string to use |
| 1365 | * @...: Arguments for the format string |
| 1366 | * |
| 1367 | * The return value is the number of characters which would be |
| 1368 | * generated for the given input, excluding the trailing null, |
| 1369 | * as per ISO C99. If the return is greater than or equal to |
| 1370 | * @size, the resulting string is truncated. |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1371 | * |
| 1372 | * See the vsnprintf() documentation for format string extensions over C99. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1373 | */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1374 | int snprintf(char *buf, size_t size, const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1375 | { |
| 1376 | va_list args; |
| 1377 | int i; |
| 1378 | |
| 1379 | va_start(args, fmt); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1380 | i = vsnprintf(buf, size, fmt, args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1381 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1382 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1383 | return i; |
| 1384 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1385 | EXPORT_SYMBOL(snprintf); |
| 1386 | |
| 1387 | /** |
| 1388 | * scnprintf - Format a string and place it in a buffer |
| 1389 | * @buf: The buffer to place the result into |
| 1390 | * @size: The size of the buffer, including the trailing null space |
| 1391 | * @fmt: The format string to use |
| 1392 | * @...: Arguments for the format string |
| 1393 | * |
| 1394 | * 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] | 1395 | * the trailing '\0'. If @size is == 0 the function returns 0. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1396 | */ |
| 1397 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1398 | int scnprintf(char *buf, size_t size, const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1399 | { |
| 1400 | va_list args; |
| 1401 | int i; |
| 1402 | |
| 1403 | va_start(args, fmt); |
Anton Arapov | b921c69 | 2011-01-12 16:59:49 -0800 | [diff] [blame] | 1404 | i = vscnprintf(buf, size, fmt, args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1406 | |
Anton Arapov | b921c69 | 2011-01-12 16:59:49 -0800 | [diff] [blame] | 1407 | return i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1408 | } |
| 1409 | EXPORT_SYMBOL(scnprintf); |
| 1410 | |
| 1411 | /** |
| 1412 | * vsprintf - Format a string and place it in a buffer |
| 1413 | * @buf: The buffer to place the result into |
| 1414 | * @fmt: The format string to use |
| 1415 | * @args: Arguments for the format string |
| 1416 | * |
| 1417 | * The function returns the number of characters written |
Robert P. J. Day | 72fd4a3 | 2007-02-10 01:45:59 -0800 | [diff] [blame] | 1418 | * into @buf. Use vsnprintf() or vscnprintf() in order to avoid |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | * buffer overflows. |
| 1420 | * |
Uwe Kleine-König | ba1835e | 2011-04-06 07:49:04 -0700 | [diff] [blame] | 1421 | * If you're not already dealing with a va_list consider using sprintf(). |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1422 | * |
| 1423 | * See the vsnprintf() documentation for format string extensions over C99. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1424 | */ |
| 1425 | int vsprintf(char *buf, const char *fmt, va_list args) |
| 1426 | { |
| 1427 | return vsnprintf(buf, INT_MAX, fmt, args); |
| 1428 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | EXPORT_SYMBOL(vsprintf); |
| 1430 | |
| 1431 | /** |
| 1432 | * sprintf - Format a string and place it in a buffer |
| 1433 | * @buf: The buffer to place the result into |
| 1434 | * @fmt: The format string to use |
| 1435 | * @...: Arguments for the format string |
| 1436 | * |
| 1437 | * The function returns the number of characters written |
Robert P. J. Day | 72fd4a3 | 2007-02-10 01:45:59 -0800 | [diff] [blame] | 1438 | * into @buf. Use snprintf() or scnprintf() in order to avoid |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1439 | * buffer overflows. |
Andi Kleen | 20036fd | 2008-10-15 22:02:02 -0700 | [diff] [blame] | 1440 | * |
| 1441 | * See the vsnprintf() documentation for format string extensions over C99. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1442 | */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1443 | int sprintf(char *buf, const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1444 | { |
| 1445 | va_list args; |
| 1446 | int i; |
| 1447 | |
| 1448 | va_start(args, fmt); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1449 | i = vsnprintf(buf, INT_MAX, fmt, args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1450 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1451 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | return i; |
| 1453 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1454 | EXPORT_SYMBOL(sprintf); |
| 1455 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1456 | #ifdef CONFIG_BINARY_PRINTF |
| 1457 | /* |
| 1458 | * bprintf service: |
| 1459 | * vbin_printf() - VA arguments to binary data |
| 1460 | * bstr_printf() - Binary data to text string |
| 1461 | */ |
| 1462 | |
| 1463 | /** |
| 1464 | * vbin_printf - Parse a format string and place args' binary value in a buffer |
| 1465 | * @bin_buf: The buffer to place args' binary value |
| 1466 | * @size: The size of the buffer(by words(32bits), not characters) |
| 1467 | * @fmt: The format string to use |
| 1468 | * @args: Arguments for the format string |
| 1469 | * |
| 1470 | * The format follows C99 vsnprintf, except %n is ignored, and its argument |
| 1471 | * is skiped. |
| 1472 | * |
| 1473 | * The return value is the number of words(32bits) which would be generated for |
| 1474 | * the given input. |
| 1475 | * |
| 1476 | * NOTE: |
| 1477 | * If the return value is greater than @size, the resulting bin_buf is NOT |
| 1478 | * valid for bstr_printf(). |
| 1479 | */ |
| 1480 | int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args) |
| 1481 | { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1482 | struct printf_spec spec = {0}; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1483 | char *str, *end; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1484 | |
| 1485 | str = (char *)bin_buf; |
| 1486 | end = (char *)(bin_buf + size); |
| 1487 | |
| 1488 | #define save_arg(type) \ |
| 1489 | do { \ |
| 1490 | if (sizeof(type) == 8) { \ |
| 1491 | unsigned long long value; \ |
| 1492 | str = PTR_ALIGN(str, sizeof(u32)); \ |
| 1493 | value = va_arg(args, unsigned long long); \ |
| 1494 | if (str + sizeof(type) <= end) { \ |
| 1495 | *(u32 *)str = *(u32 *)&value; \ |
| 1496 | *(u32 *)(str + 4) = *((u32 *)&value + 1); \ |
| 1497 | } \ |
| 1498 | } else { \ |
| 1499 | unsigned long value; \ |
| 1500 | str = PTR_ALIGN(str, sizeof(type)); \ |
| 1501 | value = va_arg(args, int); \ |
| 1502 | if (str + sizeof(type) <= end) \ |
| 1503 | *(typeof(type) *)str = (type)value; \ |
| 1504 | } \ |
| 1505 | str += sizeof(type); \ |
| 1506 | } while (0) |
| 1507 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1508 | while (*fmt) { |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1509 | int read = format_decode(fmt, &spec); |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1510 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1511 | fmt += read; |
| 1512 | |
| 1513 | switch (spec.type) { |
| 1514 | case FORMAT_TYPE_NONE: |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1515 | case FORMAT_TYPE_INVALID: |
| 1516 | case FORMAT_TYPE_PERCENT_CHAR: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1517 | break; |
| 1518 | |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1519 | case FORMAT_TYPE_WIDTH: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1520 | case FORMAT_TYPE_PRECISION: |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1521 | save_arg(int); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1522 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1523 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1524 | case FORMAT_TYPE_CHAR: |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1525 | save_arg(char); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1526 | break; |
| 1527 | |
| 1528 | case FORMAT_TYPE_STR: { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1529 | const char *save_str = va_arg(args, char *); |
| 1530 | size_t len; |
André Goddard Rosa | 6c35663 | 2009-12-14 18:00:56 -0800 | [diff] [blame] | 1531 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1532 | if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE |
| 1533 | || (unsigned long)save_str < PAGE_SIZE) |
André Goddard Rosa | 0f4f81d | 2009-12-14 18:00:55 -0800 | [diff] [blame] | 1534 | save_str = "(null)"; |
André Goddard Rosa | 6c35663 | 2009-12-14 18:00:56 -0800 | [diff] [blame] | 1535 | len = strlen(save_str) + 1; |
| 1536 | if (str + len < end) |
| 1537 | memcpy(str, save_str, len); |
| 1538 | str += len; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1539 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1540 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1541 | |
| 1542 | case FORMAT_TYPE_PTR: |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1543 | save_arg(void *); |
| 1544 | /* skip all alphanumeric pointer suffixes */ |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1545 | while (isalnum(*fmt)) |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1546 | fmt++; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1547 | break; |
| 1548 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1549 | case FORMAT_TYPE_NRCHARS: { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1550 | /* skip %n 's argument */ |
Joe Perches | ef0658f | 2010-03-06 17:10:14 -0800 | [diff] [blame] | 1551 | u8 qualifier = spec.qualifier; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1552 | void *skip_arg; |
| 1553 | if (qualifier == 'l') |
| 1554 | skip_arg = va_arg(args, long *); |
Andy Shevchenko | 75fb8f2 | 2011-07-25 17:13:20 -0700 | [diff] [blame] | 1555 | else if (_tolower(qualifier) == 'z') |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1556 | skip_arg = va_arg(args, size_t *); |
| 1557 | else |
| 1558 | skip_arg = va_arg(args, int *); |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1559 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1560 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1561 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1562 | default: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1563 | switch (spec.type) { |
| 1564 | |
| 1565 | case FORMAT_TYPE_LONG_LONG: |
| 1566 | save_arg(long long); |
| 1567 | break; |
| 1568 | case FORMAT_TYPE_ULONG: |
| 1569 | case FORMAT_TYPE_LONG: |
| 1570 | save_arg(unsigned long); |
| 1571 | break; |
| 1572 | case FORMAT_TYPE_SIZE_T: |
| 1573 | save_arg(size_t); |
| 1574 | break; |
| 1575 | case FORMAT_TYPE_PTRDIFF: |
| 1576 | save_arg(ptrdiff_t); |
| 1577 | break; |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1578 | case FORMAT_TYPE_UBYTE: |
| 1579 | case FORMAT_TYPE_BYTE: |
| 1580 | save_arg(char); |
| 1581 | break; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1582 | case FORMAT_TYPE_USHORT: |
| 1583 | case FORMAT_TYPE_SHORT: |
| 1584 | save_arg(short); |
| 1585 | break; |
| 1586 | default: |
| 1587 | save_arg(int); |
| 1588 | } |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1589 | } |
| 1590 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1591 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1592 | return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1593 | #undef save_arg |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1594 | } |
| 1595 | EXPORT_SYMBOL_GPL(vbin_printf); |
| 1596 | |
| 1597 | /** |
| 1598 | * bstr_printf - Format a string from binary arguments and place it in a buffer |
| 1599 | * @buf: The buffer to place the result into |
| 1600 | * @size: The size of the buffer, including the trailing null space |
| 1601 | * @fmt: The format string to use |
| 1602 | * @bin_buf: Binary arguments for the format string |
| 1603 | * |
| 1604 | * This function like C99 vsnprintf, but the difference is that vsnprintf gets |
| 1605 | * arguments from stack, and bstr_printf gets arguments from @bin_buf which is |
| 1606 | * a binary buffer that generated by vbin_printf. |
| 1607 | * |
| 1608 | * The format follows C99 vsnprintf, but has some extensions: |
Steven Rostedt | 0efb4d2 | 2009-09-17 09:27:29 -0400 | [diff] [blame] | 1609 | * see vsnprintf comment for details. |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1610 | * |
| 1611 | * The return value is the number of characters which would |
| 1612 | * be generated for the given input, excluding the trailing |
| 1613 | * '\0', as per ISO C99. If you want to have the exact |
| 1614 | * number of characters written into @buf as return value |
| 1615 | * (not including the trailing '\0'), use vscnprintf(). If the |
| 1616 | * return is greater than or equal to @size, the resulting |
| 1617 | * string is truncated. |
| 1618 | */ |
| 1619 | int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf) |
| 1620 | { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1621 | struct printf_spec spec = {0}; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1622 | char *str, *end; |
| 1623 | const char *args = (const char *)bin_buf; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1624 | |
Marcin Slusarz | 2f30b1f9 | 2009-09-21 17:04:29 -0700 | [diff] [blame] | 1625 | if (WARN_ON_ONCE((int) size < 0)) |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1626 | return 0; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1627 | |
| 1628 | str = buf; |
| 1629 | end = buf + size; |
| 1630 | |
| 1631 | #define get_arg(type) \ |
| 1632 | ({ \ |
| 1633 | typeof(type) value; \ |
| 1634 | if (sizeof(type) == 8) { \ |
| 1635 | args = PTR_ALIGN(args, sizeof(u32)); \ |
| 1636 | *(u32 *)&value = *(u32 *)args; \ |
| 1637 | *((u32 *)&value + 1) = *(u32 *)(args + 4); \ |
| 1638 | } else { \ |
| 1639 | args = PTR_ALIGN(args, sizeof(type)); \ |
| 1640 | value = *(typeof(type) *)args; \ |
| 1641 | } \ |
| 1642 | args += sizeof(type); \ |
| 1643 | value; \ |
| 1644 | }) |
| 1645 | |
| 1646 | /* Make sure end is always >= buf */ |
| 1647 | if (end < buf) { |
| 1648 | end = ((void *)-1); |
| 1649 | size = end - buf; |
| 1650 | } |
| 1651 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1652 | while (*fmt) { |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1653 | const char *old_fmt = fmt; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1654 | int read = format_decode(fmt, &spec); |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1655 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1656 | fmt += read; |
| 1657 | |
| 1658 | switch (spec.type) { |
| 1659 | case FORMAT_TYPE_NONE: { |
| 1660 | int copy = read; |
| 1661 | if (str < end) { |
| 1662 | if (copy > end - str) |
| 1663 | copy = end - str; |
| 1664 | memcpy(str, old_fmt, copy); |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1665 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1666 | str += read; |
| 1667 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1668 | } |
| 1669 | |
Vegard Nossum | ed681a9 | 2009-03-14 12:08:50 +0100 | [diff] [blame] | 1670 | case FORMAT_TYPE_WIDTH: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1671 | spec.field_width = get_arg(int); |
| 1672 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1673 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1674 | case FORMAT_TYPE_PRECISION: |
| 1675 | spec.precision = get_arg(int); |
| 1676 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1677 | |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1678 | case FORMAT_TYPE_CHAR: { |
| 1679 | char c; |
| 1680 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1681 | if (!(spec.flags & LEFT)) { |
| 1682 | while (--spec.field_width > 0) { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1683 | if (str < end) |
| 1684 | *str = ' '; |
| 1685 | ++str; |
| 1686 | } |
| 1687 | } |
| 1688 | c = (unsigned char) get_arg(char); |
| 1689 | if (str < end) |
| 1690 | *str = c; |
| 1691 | ++str; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1692 | while (--spec.field_width > 0) { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1693 | if (str < end) |
| 1694 | *str = ' '; |
| 1695 | ++str; |
| 1696 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1697 | break; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1698 | } |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1699 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1700 | case FORMAT_TYPE_STR: { |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1701 | const char *str_arg = args; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1702 | args += strlen(str_arg) + 1; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1703 | str = string(str, end, (char *)str_arg, spec); |
| 1704 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1705 | } |
| 1706 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1707 | case FORMAT_TYPE_PTR: |
| 1708 | str = pointer(fmt+1, str, end, get_arg(void *), spec); |
| 1709 | while (isalnum(*fmt)) |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1710 | fmt++; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1711 | break; |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1712 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1713 | case FORMAT_TYPE_PERCENT_CHAR: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1714 | case FORMAT_TYPE_INVALID: |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1715 | if (str < end) |
| 1716 | *str = '%'; |
| 1717 | ++str; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1718 | break; |
| 1719 | |
| 1720 | case FORMAT_TYPE_NRCHARS: |
| 1721 | /* skip */ |
| 1722 | break; |
| 1723 | |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1724 | default: { |
| 1725 | unsigned long long num; |
| 1726 | |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1727 | switch (spec.type) { |
| 1728 | |
| 1729 | case FORMAT_TYPE_LONG_LONG: |
| 1730 | num = get_arg(long long); |
| 1731 | break; |
| 1732 | case FORMAT_TYPE_ULONG: |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1733 | case FORMAT_TYPE_LONG: |
| 1734 | num = get_arg(unsigned long); |
| 1735 | break; |
| 1736 | case FORMAT_TYPE_SIZE_T: |
| 1737 | num = get_arg(size_t); |
| 1738 | break; |
| 1739 | case FORMAT_TYPE_PTRDIFF: |
| 1740 | num = get_arg(ptrdiff_t); |
| 1741 | break; |
Zhaolei | a4e94ef | 2009-03-27 17:07:05 +0800 | [diff] [blame] | 1742 | case FORMAT_TYPE_UBYTE: |
| 1743 | num = get_arg(unsigned char); |
| 1744 | break; |
| 1745 | case FORMAT_TYPE_BYTE: |
| 1746 | num = get_arg(signed char); |
| 1747 | break; |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1748 | case FORMAT_TYPE_USHORT: |
| 1749 | num = get_arg(unsigned short); |
| 1750 | break; |
| 1751 | case FORMAT_TYPE_SHORT: |
| 1752 | num = get_arg(short); |
| 1753 | break; |
| 1754 | case FORMAT_TYPE_UINT: |
| 1755 | num = get_arg(unsigned int); |
| 1756 | break; |
| 1757 | default: |
| 1758 | num = get_arg(int); |
| 1759 | } |
| 1760 | |
| 1761 | str = number(str, end, num, spec); |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1762 | } /* default: */ |
| 1763 | } /* switch(spec.type) */ |
| 1764 | } /* while(*fmt) */ |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1765 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1766 | if (size > 0) { |
| 1767 | if (str < end) |
| 1768 | *str = '\0'; |
| 1769 | else |
| 1770 | end[-1] = '\0'; |
| 1771 | } |
Frederic Weisbecker | fef20d9c | 2009-03-06 17:21:50 +0100 | [diff] [blame] | 1772 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1773 | #undef get_arg |
| 1774 | |
| 1775 | /* the trailing null byte doesn't count towards the total */ |
| 1776 | return str - buf; |
| 1777 | } |
| 1778 | EXPORT_SYMBOL_GPL(bstr_printf); |
| 1779 | |
| 1780 | /** |
| 1781 | * bprintf - Parse a format string and place args' binary value in a buffer |
| 1782 | * @bin_buf: The buffer to place args' binary value |
| 1783 | * @size: The size of the buffer(by words(32bits), not characters) |
| 1784 | * @fmt: The format string to use |
| 1785 | * @...: Arguments for the format string |
| 1786 | * |
| 1787 | * The function returns the number of words(u32) written |
| 1788 | * into @bin_buf. |
| 1789 | */ |
| 1790 | int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) |
| 1791 | { |
| 1792 | va_list args; |
| 1793 | int ret; |
| 1794 | |
| 1795 | va_start(args, fmt); |
| 1796 | ret = vbin_printf(bin_buf, size, fmt, args); |
| 1797 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1798 | |
Lai Jiangshan | 4370aa4 | 2009-03-06 17:21:46 +0100 | [diff] [blame] | 1799 | return ret; |
| 1800 | } |
| 1801 | EXPORT_SYMBOL_GPL(bprintf); |
| 1802 | |
| 1803 | #endif /* CONFIG_BINARY_PRINTF */ |
| 1804 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1805 | /** |
| 1806 | * vsscanf - Unformat a buffer into a list of arguments |
| 1807 | * @buf: input buffer |
| 1808 | * @fmt: format of buffer |
| 1809 | * @args: arguments |
| 1810 | */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1811 | int vsscanf(const char *buf, const char *fmt, va_list args) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | { |
| 1813 | const char *str = buf; |
| 1814 | char *next; |
| 1815 | char digit; |
| 1816 | int num = 0; |
Joe Perches | ef0658f | 2010-03-06 17:10:14 -0800 | [diff] [blame] | 1817 | u8 qualifier; |
| 1818 | u8 base; |
| 1819 | s16 field_width; |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1820 | bool is_sign; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1821 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1822 | while (*fmt && *str) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1823 | /* skip any white space in format */ |
| 1824 | /* white space in format matchs any amount of |
| 1825 | * white space, including none, in the input. |
| 1826 | */ |
| 1827 | if (isspace(*fmt)) { |
André Goddard Rosa | e7d2860 | 2009-12-14 18:01:06 -0800 | [diff] [blame] | 1828 | fmt = skip_spaces(++fmt); |
| 1829 | str = skip_spaces(str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1830 | } |
| 1831 | |
| 1832 | /* anything that is not a conversion must match exactly */ |
| 1833 | if (*fmt != '%' && *fmt) { |
| 1834 | if (*fmt++ != *str++) |
| 1835 | break; |
| 1836 | continue; |
| 1837 | } |
| 1838 | |
| 1839 | if (!*fmt) |
| 1840 | break; |
| 1841 | ++fmt; |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1842 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1843 | /* skip this conversion. |
| 1844 | * advance both strings to next white space |
| 1845 | */ |
| 1846 | if (*fmt == '*') { |
Andy Spencer | 8fccae2 | 2009-10-01 15:44:27 -0700 | [diff] [blame] | 1847 | while (!isspace(*fmt) && *fmt != '%' && *fmt) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | fmt++; |
| 1849 | while (!isspace(*str) && *str) |
| 1850 | str++; |
| 1851 | continue; |
| 1852 | } |
| 1853 | |
| 1854 | /* get field width */ |
| 1855 | field_width = -1; |
| 1856 | if (isdigit(*fmt)) |
| 1857 | field_width = skip_atoi(&fmt); |
| 1858 | |
| 1859 | /* get conversion qualifier */ |
| 1860 | qualifier = -1; |
Andy Shevchenko | 75fb8f2 | 2011-07-25 17:13:20 -0700 | [diff] [blame] | 1861 | if (*fmt == 'h' || _tolower(*fmt) == 'l' || |
| 1862 | _tolower(*fmt) == 'z') { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1863 | qualifier = *fmt++; |
| 1864 | if (unlikely(qualifier == *fmt)) { |
| 1865 | if (qualifier == 'h') { |
| 1866 | qualifier = 'H'; |
| 1867 | fmt++; |
| 1868 | } else if (qualifier == 'l') { |
| 1869 | qualifier = 'L'; |
| 1870 | fmt++; |
| 1871 | } |
| 1872 | } |
| 1873 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1874 | |
| 1875 | if (!*fmt || !*str) |
| 1876 | break; |
| 1877 | |
André Goddard Rosa | d4be151 | 2009-12-14 18:00:59 -0800 | [diff] [blame] | 1878 | base = 10; |
| 1879 | is_sign = 0; |
| 1880 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1881 | switch (*fmt++) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | case 'c': |
| 1883 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1884 | char *s = (char *)va_arg(args, char*); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1885 | if (field_width == -1) |
| 1886 | field_width = 1; |
| 1887 | do { |
| 1888 | *s++ = *str++; |
| 1889 | } while (--field_width > 0 && *str); |
| 1890 | num++; |
| 1891 | } |
| 1892 | continue; |
| 1893 | case 's': |
| 1894 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1895 | char *s = (char *)va_arg(args, char *); |
| 1896 | if (field_width == -1) |
Alexey Dobriyan | 4be929b | 2010-05-24 14:33:03 -0700 | [diff] [blame] | 1897 | field_width = SHRT_MAX; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | /* first, skip leading white space in buffer */ |
André Goddard Rosa | e7d2860 | 2009-12-14 18:01:06 -0800 | [diff] [blame] | 1899 | str = skip_spaces(str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1900 | |
| 1901 | /* now copy until next white space */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1902 | while (*str && !isspace(*str) && field_width--) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1903 | *s++ = *str++; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | *s = '\0'; |
| 1905 | num++; |
| 1906 | } |
| 1907 | continue; |
| 1908 | case 'n': |
| 1909 | /* return number of characters read so far */ |
| 1910 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1911 | int *i = (int *)va_arg(args, int*); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | *i = str - buf; |
| 1913 | } |
| 1914 | continue; |
| 1915 | case 'o': |
| 1916 | base = 8; |
| 1917 | break; |
| 1918 | case 'x': |
| 1919 | case 'X': |
| 1920 | base = 16; |
| 1921 | break; |
| 1922 | case 'i': |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1923 | base = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1924 | case 'd': |
| 1925 | is_sign = 1; |
| 1926 | case 'u': |
| 1927 | break; |
| 1928 | case '%': |
| 1929 | /* looking for '%' in str */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1930 | if (*str++ != '%') |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1931 | return num; |
| 1932 | continue; |
| 1933 | default: |
| 1934 | /* invalid format; stop here */ |
| 1935 | return num; |
| 1936 | } |
| 1937 | |
| 1938 | /* have some sort of integer conversion. |
| 1939 | * first, skip white space in buffer. |
| 1940 | */ |
André Goddard Rosa | e7d2860 | 2009-12-14 18:01:06 -0800 | [diff] [blame] | 1941 | str = skip_spaces(str); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | |
| 1943 | digit = *str; |
| 1944 | if (is_sign && digit == '-') |
| 1945 | digit = *(str + 1); |
| 1946 | |
| 1947 | if (!digit |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1948 | || (base == 16 && !isxdigit(digit)) |
| 1949 | || (base == 10 && !isdigit(digit)) |
| 1950 | || (base == 8 && (!isdigit(digit) || digit > '7')) |
| 1951 | || (base == 0 && !isdigit(digit))) |
| 1952 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1953 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1954 | switch (qualifier) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1955 | case 'H': /* that's 'hh' in format */ |
| 1956 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1957 | signed char *s = (signed char *)va_arg(args, signed char *); |
| 1958 | *s = (signed char)simple_strtol(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | } else { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1960 | unsigned char *s = (unsigned char *)va_arg(args, unsigned char *); |
| 1961 | *s = (unsigned char)simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1962 | } |
| 1963 | break; |
| 1964 | case 'h': |
| 1965 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1966 | short *s = (short *)va_arg(args, short *); |
| 1967 | *s = (short)simple_strtol(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1968 | } else { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1969 | unsigned short *s = (unsigned short *)va_arg(args, unsigned short *); |
| 1970 | *s = (unsigned short)simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1971 | } |
| 1972 | break; |
| 1973 | case 'l': |
| 1974 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1975 | long *l = (long *)va_arg(args, long *); |
| 1976 | *l = simple_strtol(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1977 | } else { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1978 | unsigned long *l = (unsigned long *)va_arg(args, unsigned long *); |
| 1979 | *l = simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1980 | } |
| 1981 | break; |
| 1982 | case 'L': |
| 1983 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1984 | long long *l = (long long *)va_arg(args, long long *); |
| 1985 | *l = simple_strtoll(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1986 | } else { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1987 | unsigned long long *l = (unsigned long long *)va_arg(args, unsigned long long *); |
| 1988 | *l = simple_strtoull(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1989 | } |
| 1990 | break; |
| 1991 | case 'Z': |
| 1992 | case 'z': |
| 1993 | { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 1994 | size_t *s = (size_t *)va_arg(args, size_t *); |
| 1995 | *s = (size_t)simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1996 | } |
| 1997 | break; |
| 1998 | default: |
| 1999 | if (is_sign) { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2000 | int *i = (int *)va_arg(args, int *); |
| 2001 | *i = (int)simple_strtol(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2002 | } else { |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2003 | unsigned int *i = (unsigned int *)va_arg(args, unsigned int*); |
| 2004 | *i = (unsigned int)simple_strtoul(str, &next, base); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2005 | } |
| 2006 | break; |
| 2007 | } |
| 2008 | num++; |
| 2009 | |
| 2010 | if (!next) |
| 2011 | break; |
| 2012 | str = next; |
| 2013 | } |
Johannes Berg | c6b40d1 | 2007-05-08 00:27:20 -0700 | [diff] [blame] | 2014 | |
| 2015 | /* |
| 2016 | * Now we've come all the way through so either the input string or the |
| 2017 | * format ended. In the former case, there can be a %n at the current |
| 2018 | * position in the format that needs to be filled. |
| 2019 | */ |
| 2020 | if (*fmt == '%' && *(fmt + 1) == 'n') { |
| 2021 | int *p = (int *)va_arg(args, int *); |
| 2022 | *p = str - buf; |
| 2023 | } |
| 2024 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2025 | return num; |
| 2026 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2027 | EXPORT_SYMBOL(vsscanf); |
| 2028 | |
| 2029 | /** |
| 2030 | * sscanf - Unformat a buffer into a list of arguments |
| 2031 | * @buf: input buffer |
| 2032 | * @fmt: formatting of buffer |
| 2033 | * @...: resulting arguments |
| 2034 | */ |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2035 | int sscanf(const char *buf, const char *fmt, ...) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2036 | { |
| 2037 | va_list args; |
| 2038 | int i; |
| 2039 | |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2040 | va_start(args, fmt); |
| 2041 | i = vsscanf(buf, fmt, args); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | va_end(args); |
André Goddard Rosa | 7b9186f | 2009-12-14 18:00:57 -0800 | [diff] [blame] | 2043 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2044 | return i; |
| 2045 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | EXPORT_SYMBOL(sscanf); |