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lib/vsprintf.c
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/* * linux/lib/vsprintf.c * * Copyright (C) 1991, 1992 Linus Torvalds */ /* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */ /* * Wirzenius wrote this portably, Torvalds fucked it up :-) */ |
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/* |
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* Fri Jul 13 2001 Crutcher Dunnavant <crutcher+kernel@datastacks.com> * - changed to provide snprintf and vsnprintf functions * So Feb 1 16:51:32 CET 2004 Juergen Quade <quade@hsnr.de> * - scnprintf and vscnprintf */ #include <stdarg.h> #include <linux/module.h> #include <linux/types.h> #include <linux/string.h> #include <linux/ctype.h> #include <linux/kernel.h> |
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#include <linux/kallsyms.h> #include <linux/uaccess.h> |
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#include <linux/ioport.h> |
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#include <net/addrconf.h> |
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#include <asm/page.h> /* for PAGE_SIZE */ |
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#include <asm/div64.h> |
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#include <asm/sections.h> /* for dereference_function_descriptor() */ |
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#include "kstrtox.h" |
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/** |
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* simple_strtoull - convert a string to an unsigned long long |
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* @cp: The start of the string * @endp: A pointer to the end of the parsed string will be placed here * @base: The number base to use */ |
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unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base) |
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{ |
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unsigned long long result; unsigned int rv; |
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cp = _parse_integer_fixup_radix(cp, &base); rv = _parse_integer(cp, base, &result); /* FIXME */ cp += (rv & ~KSTRTOX_OVERFLOW); |
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if (endp) *endp = (char *)cp; |
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return result; } |
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EXPORT_SYMBOL(simple_strtoull); |
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/** |
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* simple_strtoul - convert a string to an unsigned long |
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* @cp: The start of the string * @endp: A pointer to the end of the parsed string will be placed here * @base: The number base to use */ |
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unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base) |
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{ |
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return simple_strtoull(cp, endp, base); |
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} |
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EXPORT_SYMBOL(simple_strtoul); |
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/** |
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* simple_strtol - convert a string to a signed long |
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* @cp: The start of the string * @endp: A pointer to the end of the parsed string will be placed here * @base: The number base to use */ |
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long simple_strtol(const char *cp, char **endp, unsigned int base) |
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{ |
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if (*cp == '-') return -simple_strtoul(cp + 1, endp, base); |
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return simple_strtoul(cp, endp, base); |
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} |
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EXPORT_SYMBOL(simple_strtol); |
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/** * simple_strtoll - convert a string to a signed long long * @cp: The start of the string * @endp: A pointer to the end of the parsed string will be placed here * @base: The number base to use */ |
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long long simple_strtoll(const char *cp, char **endp, unsigned int base) |
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{ |
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if (*cp == '-') |
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return -simple_strtoull(cp + 1, endp, base); |
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return simple_strtoull(cp, endp, base); |
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} |
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EXPORT_SYMBOL(simple_strtoll); |
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static noinline_for_stack int skip_atoi(const char **s) |
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{ |
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int i = 0; |
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while (isdigit(**s)) i = i*10 + *((*s)++) - '0'; |
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return i; } |
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/* Decimal conversion is by far the most typical, and is used * for /proc and /sys data. This directly impacts e.g. top performance * with many processes running. We optimize it for speed * using code from * http://www.cs.uiowa.edu/~jones/bcd/decimal.html * (with permission from the author, Douglas W. Jones). */ /* Formats correctly any integer in [0,99999]. * Outputs from one to five digits depending on input. * On i386 gcc 4.1.2 -O2: ~250 bytes of code. */ |
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static noinline_for_stack char *put_dec_trunc(char *buf, unsigned q) |
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{ unsigned d3, d2, d1, d0; d1 = (q>>4) & 0xf; d2 = (q>>8) & 0xf; d3 = (q>>12); d0 = 6*(d3 + d2 + d1) + (q & 0xf); q = (d0 * 0xcd) >> 11; d0 = d0 - 10*q; *buf++ = d0 + '0'; /* least significant digit */ d1 = q + 9*d3 + 5*d2 + d1; if (d1 != 0) { q = (d1 * 0xcd) >> 11; d1 = d1 - 10*q; *buf++ = d1 + '0'; /* next digit */ d2 = q + 2*d2; if ((d2 != 0) || (d3 != 0)) { q = (d2 * 0xd) >> 7; d2 = d2 - 10*q; *buf++ = d2 + '0'; /* next digit */ d3 = q + 4*d3; if (d3 != 0) { q = (d3 * 0xcd) >> 11; d3 = d3 - 10*q; *buf++ = d3 + '0'; /* next digit */ if (q != 0) |
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*buf++ = q + '0'; /* most sign. digit */ |
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} } } |
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return buf; } /* Same with if's removed. Always emits five digits */ |
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static noinline_for_stack char *put_dec_full(char *buf, unsigned q) |
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{ /* BTW, if q is in [0,9999], 8-bit ints will be enough, */ /* but anyway, gcc produces better code with full-sized ints */ unsigned d3, d2, d1, d0; d1 = (q>>4) & 0xf; d2 = (q>>8) & 0xf; d3 = (q>>12); |
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/* * Possible ways to approx. divide by 10 * gcc -O2 replaces multiply with shifts and adds * (x * 0xcd) >> 11: 11001101 - shorter code than * 0x67 (on i386) * (x * 0x67) >> 10: 1100111 * (x * 0x34) >> 9: 110100 - same * (x * 0x1a) >> 8: 11010 - same * (x * 0x0d) >> 7: 1101 - same, shortest code (on i386) */ |
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d0 = 6*(d3 + d2 + d1) + (q & 0xf); q = (d0 * 0xcd) >> 11; d0 = d0 - 10*q; *buf++ = d0 + '0'; d1 = q + 9*d3 + 5*d2 + d1; q = (d1 * 0xcd) >> 11; d1 = d1 - 10*q; *buf++ = d1 + '0'; d2 = q + 2*d2; q = (d2 * 0xd) >> 7; d2 = d2 - 10*q; *buf++ = d2 + '0'; d3 = q + 4*d3; q = (d3 * 0xcd) >> 11; /* - shorter code */ /* q = (d3 * 0x67) >> 10; - would also work */ d3 = d3 - 10*q; *buf++ = d3 + '0'; *buf++ = q + '0'; |
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return buf; } /* No inlining helps gcc to use registers better */ |
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static noinline_for_stack char *put_dec(char *buf, unsigned long long num) |
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{ while (1) { unsigned rem; if (num < 100000) return put_dec_trunc(buf, num); rem = do_div(num, 100000); buf = put_dec_full(buf, rem); } } |
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#define ZEROPAD 1 /* pad with zero */ #define SIGN 2 /* unsigned/signed long */ #define PLUS 4 /* show plus */ #define SPACE 8 /* space if plus */ #define LEFT 16 /* left justified */ |
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#define SMALL 32 /* use lowercase in hex (must be 32 == 0x20) */ #define SPECIAL 64 /* prefix hex with "0x", octal with "0" */ |
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enum format_type { FORMAT_TYPE_NONE, /* Just a string part */ |
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FORMAT_TYPE_WIDTH, |
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FORMAT_TYPE_PRECISION, FORMAT_TYPE_CHAR, FORMAT_TYPE_STR, FORMAT_TYPE_PTR, FORMAT_TYPE_PERCENT_CHAR, FORMAT_TYPE_INVALID, FORMAT_TYPE_LONG_LONG, FORMAT_TYPE_ULONG, FORMAT_TYPE_LONG, |
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FORMAT_TYPE_UBYTE, FORMAT_TYPE_BYTE, |
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FORMAT_TYPE_USHORT, FORMAT_TYPE_SHORT, FORMAT_TYPE_UINT, FORMAT_TYPE_INT, FORMAT_TYPE_NRCHARS, FORMAT_TYPE_SIZE_T, FORMAT_TYPE_PTRDIFF }; struct printf_spec { |
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u8 type; /* format_type enum */ |
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u8 flags; /* flags to number() */ |
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u8 base; /* number base, 8, 10 or 16 only */ u8 qualifier; /* number qualifier, one of 'hHlLtzZ' */ s16 field_width; /* width of output field */ s16 precision; /* # of digits/chars */ |
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}; |
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static noinline_for_stack char *number(char *buf, char *end, unsigned long long num, struct printf_spec spec) |
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{ |
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/* we are called with base 8, 10 or 16, only, thus don't need "G..." */ static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */ char tmp[66]; char sign; char locase; |
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int need_pfx = ((spec.flags & SPECIAL) && spec.base != 10); |
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int i; |
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/* locase = 0 or 0x20. ORing digits or letters with 'locase' * produces same digits or (maybe lowercased) letters */ |
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locase = (spec.flags & SMALL); if (spec.flags & LEFT) spec.flags &= ~ZEROPAD; |
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sign = 0; |
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if (spec.flags & SIGN) { |
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if ((signed long long)num < 0) { |
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sign = '-'; |
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num = -(signed long long)num; |
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spec.field_width--; } else if (spec.flags & PLUS) { |
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sign = '+'; |
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spec.field_width--; } else if (spec.flags & SPACE) { |
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sign = ' '; |
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spec.field_width--; |
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} } |
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if (need_pfx) { |
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spec.field_width--; if (spec.base == 16) spec.field_width--; |
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} |
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/* generate full string in tmp[], in reverse order */ |
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i = 0; if (num == 0) |
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tmp[i++] = '0'; |
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/* Generic code, for any base: else do { |
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tmp[i++] = (digits[do_div(num,base)] | locase); |
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} while (num != 0); */ |
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else if (spec.base != 10) { /* 8 or 16 */ int mask = spec.base - 1; |
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int shift = 3; |
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if (spec.base == 16) shift = 4; |
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do { |
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tmp[i++] = (digits[((unsigned char)num) & mask] | locase); |
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num >>= shift; } while (num); |
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} else { /* base 10 */ i = put_dec(tmp, num) - tmp; } |
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/* printing 100 using %2d gives "100", not "00" */ |
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if (i > spec.precision) spec.precision = i; |
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/* leading space padding */ |
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spec.field_width -= spec.precision; if (!(spec.flags & (ZEROPAD+LEFT))) { |
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while (--spec.field_width >= 0) { |
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if (buf < end) |
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*buf = ' '; ++buf; } } |
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/* sign */ |
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if (sign) { |
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if (buf < end) |
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*buf = sign; ++buf; } |
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/* "0x" / "0" prefix */ if (need_pfx) { if (buf < end) *buf = '0'; ++buf; |
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if (spec.base == 16) { |
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if (buf < end) |
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*buf = ('X' | locase); |
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++buf; } } |
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/* zero or space padding */ |
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if (!(spec.flags & LEFT)) { char c = (spec.flags & ZEROPAD) ? '0' : ' '; while (--spec.field_width >= 0) { |
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if (buf < end) |
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*buf = c; ++buf; } } |
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/* hmm even more zero padding? */ |
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while (i <= --spec.precision) { |
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if (buf < end) |
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*buf = '0'; ++buf; } |
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/* actual digits of result */ while (--i >= 0) { |
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if (buf < end) |
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*buf = tmp[i]; ++buf; } |
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/* trailing space padding */ |
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while (--spec.field_width >= 0) { |
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if (buf < end) |
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*buf = ' '; ++buf; } |
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return buf; } |
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static noinline_for_stack char *string(char *buf, char *end, const char *s, struct printf_spec spec) |
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{ int len, i; if ((unsigned long)s < PAGE_SIZE) |
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s = "(null)"; |
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len = strnlen(s, spec.precision); |
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if (!(spec.flags & LEFT)) { while (len < spec.field_width--) { |
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if (buf < end) *buf = ' '; ++buf; } } for (i = 0; i < len; ++i) { if (buf < end) *buf = *s; ++buf; ++s; } |
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while (len < spec.field_width--) { |
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if (buf < end) *buf = ' '; ++buf; } |
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return buf; } |
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static noinline_for_stack char *symbol_string(char *buf, char *end, void *ptr, struct printf_spec spec, char ext) |
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{ unsigned long value = (unsigned long) ptr; #ifdef CONFIG_KALLSYMS char sym[KSYM_SYMBOL_LEN]; |
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if (ext == 'B') sprint_backtrace(sym, value); else if (ext != 'f' && ext != 's') |
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sprint_symbol(sym, value); else kallsyms_lookup(value, NULL, NULL, NULL, sym); |
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return string(buf, end, sym, spec); |
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#else |
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spec.field_width = 2 * sizeof(void *); |
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spec.flags |= SPECIAL | SMALL | ZEROPAD; spec.base = 16; |
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return number(buf, end, value, spec); |
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#endif } |
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static noinline_for_stack char *resource_string(char *buf, char *end, struct resource *res, struct printf_spec spec, const char *fmt) |
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{ #ifndef IO_RSRC_PRINTK_SIZE |
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#define IO_RSRC_PRINTK_SIZE 6 |
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#endif #ifndef MEM_RSRC_PRINTK_SIZE |
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#define MEM_RSRC_PRINTK_SIZE 10 |
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#endif |
4da0b66c6 vsprintf: move %p... |
433 |
static const struct printf_spec io_spec = { |
fef20d9c1 vsprintf: unify t... |
434 |
.base = 16, |
4da0b66c6 vsprintf: move %p... |
435 |
.field_width = IO_RSRC_PRINTK_SIZE, |
fef20d9c1 vsprintf: unify t... |
436 437 438 |
.precision = -1, .flags = SPECIAL | SMALL | ZEROPAD, }; |
4da0b66c6 vsprintf: move %p... |
439 440 441 442 443 444 |
static const struct printf_spec mem_spec = { .base = 16, .field_width = MEM_RSRC_PRINTK_SIZE, .precision = -1, .flags = SPECIAL | SMALL | ZEROPAD, }; |
0f4050c7d resource: add bus... |
445 446 447 448 449 450 |
static const struct printf_spec bus_spec = { .base = 16, .field_width = 2, .precision = -1, .flags = SMALL | ZEROPAD, }; |
4da0b66c6 vsprintf: move %p... |
451 |
static const struct printf_spec dec_spec = { |
c91d3376e vsprintf: add %pR... |
452 453 454 455 |
.base = 10, .precision = -1, .flags = 0, }; |
4da0b66c6 vsprintf: move %p... |
456 |
static const struct printf_spec str_spec = { |
fd95541e2 vsprintf: add %pR... |
457 458 459 460 |
.field_width = -1, .precision = 10, .flags = LEFT, }; |
4da0b66c6 vsprintf: move %p... |
461 |
static const struct printf_spec flag_spec = { |
fd95541e2 vsprintf: add %pR... |
462 463 464 465 |
.base = 16, .precision = -1, .flags = SPECIAL | SMALL, }; |
c7dabef8a vsprintf: use %pR... |
466 467 468 469 470 |
/* 32-bit res (sizeof==4): 10 chars in dec, 10 in hex ("0x" + 8) * 64-bit res (sizeof==8): 20 chars in dec, 18 in hex ("0x" + 16) */ #define RSRC_BUF_SIZE ((2 * sizeof(resource_size_t)) + 4) #define FLAG_BUF_SIZE (2 * sizeof(res->flags)) |
9d7cca042 resource: add win... |
471 |
#define DECODED_BUF_SIZE sizeof("[mem - 64bit pref window disabled]") |
c7dabef8a vsprintf: use %pR... |
472 473 474 |
#define RAW_BUF_SIZE sizeof("[mem - flags 0x]") char sym[max(2*RSRC_BUF_SIZE + DECODED_BUF_SIZE, 2*RSRC_BUF_SIZE + FLAG_BUF_SIZE + RAW_BUF_SIZE)]; |
332d2e783 Implement %pR to ... |
475 |
char *p = sym, *pend = sym + sizeof(sym); |
c7dabef8a vsprintf: use %pR... |
476 |
int decode = (fmt[0] == 'R') ? 1 : 0; |
4da0b66c6 vsprintf: move %p... |
477 |
const struct printf_spec *specp; |
332d2e783 Implement %pR to ... |
478 479 |
*p++ = '['; |
4da0b66c6 vsprintf: move %p... |
480 |
if (res->flags & IORESOURCE_IO) { |
c7dabef8a vsprintf: use %pR... |
481 |
p = string(p, pend, "io ", str_spec); |
4da0b66c6 vsprintf: move %p... |
482 483 |
specp = &io_spec; } else if (res->flags & IORESOURCE_MEM) { |
c7dabef8a vsprintf: use %pR... |
484 |
p = string(p, pend, "mem ", str_spec); |
4da0b66c6 vsprintf: move %p... |
485 486 |
specp = &mem_spec; } else if (res->flags & IORESOURCE_IRQ) { |
c7dabef8a vsprintf: use %pR... |
487 |
p = string(p, pend, "irq ", str_spec); |
4da0b66c6 vsprintf: move %p... |
488 489 |
specp = &dec_spec; } else if (res->flags & IORESOURCE_DMA) { |
c7dabef8a vsprintf: use %pR... |
490 |
p = string(p, pend, "dma ", str_spec); |
4da0b66c6 vsprintf: move %p... |
491 |
specp = &dec_spec; |
0f4050c7d resource: add bus... |
492 493 494 |
} else if (res->flags & IORESOURCE_BUS) { p = string(p, pend, "bus ", str_spec); specp = &bus_spec; |
4da0b66c6 vsprintf: move %p... |
495 |
} else { |
c7dabef8a vsprintf: use %pR... |
496 |
p = string(p, pend, "??? ", str_spec); |
4da0b66c6 vsprintf: move %p... |
497 |
specp = &mem_spec; |
c7dabef8a vsprintf: use %pR... |
498 |
decode = 0; |
fd95541e2 vsprintf: add %pR... |
499 |
} |
4da0b66c6 vsprintf: move %p... |
500 |
p = number(p, pend, res->start, *specp); |
c91d3376e vsprintf: add %pR... |
501 502 |
if (res->start != res->end) { *p++ = '-'; |
4da0b66c6 vsprintf: move %p... |
503 |
p = number(p, pend, res->end, *specp); |
c91d3376e vsprintf: add %pR... |
504 |
} |
c7dabef8a vsprintf: use %pR... |
505 |
if (decode) { |
fd95541e2 vsprintf: add %pR... |
506 507 508 509 |
if (res->flags & IORESOURCE_MEM_64) p = string(p, pend, " 64bit", str_spec); if (res->flags & IORESOURCE_PREFETCH) p = string(p, pend, " pref", str_spec); |
9d7cca042 resource: add win... |
510 511 |
if (res->flags & IORESOURCE_WINDOW) p = string(p, pend, " window", str_spec); |
fd95541e2 vsprintf: add %pR... |
512 513 |
if (res->flags & IORESOURCE_DISABLED) p = string(p, pend, " disabled", str_spec); |
c7dabef8a vsprintf: use %pR... |
514 515 516 |
} else { p = string(p, pend, " flags ", str_spec); p = number(p, pend, res->flags, flag_spec); |
fd95541e2 vsprintf: add %pR... |
517 |
} |
332d2e783 Implement %pR to ... |
518 |
*p++ = ']'; |
c7dabef8a vsprintf: use %pR... |
519 |
*p = '\0'; |
332d2e783 Implement %pR to ... |
520 |
|
fef20d9c1 vsprintf: unify t... |
521 |
return string(buf, end, sym, spec); |
332d2e783 Implement %pR to ... |
522 |
} |
cf3b429b0 vsprintf.c: use n... |
523 524 525 |
static noinline_for_stack char *mac_address_string(char *buf, char *end, u8 *addr, struct printf_spec spec, const char *fmt) |
dd45c9cf6 printk: add %pM f... |
526 |
{ |
8a27f7c90 lib/vsprintf.c: A... |
527 |
char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")]; |
dd45c9cf6 printk: add %pM f... |
528 529 |
char *p = mac_addr; int i; |
bc7259a2c lib/vsprintf.c: A... |
530 531 532 |
char separator; if (fmt[1] == 'F') { /* FDDI canonical format */ |
bc7259a2c lib/vsprintf.c: A... |
533 534 |
separator = '-'; } else { |
bc7259a2c lib/vsprintf.c: A... |
535 536 |
separator = ':'; } |
dd45c9cf6 printk: add %pM f... |
537 538 |
for (i = 0; i < 6; i++) { |
55036ba76 lib: rename pack_... |
539 |
p = hex_byte_pack(p, addr[i]); |
8a27f7c90 lib/vsprintf.c: A... |
540 |
if (fmt[0] == 'M' && i != 5) |
bc7259a2c lib/vsprintf.c: A... |
541 |
*p++ = separator; |
dd45c9cf6 printk: add %pM f... |
542 543 |
} *p = '\0'; |
fef20d9c1 vsprintf: unify t... |
544 |
return string(buf, end, mac_addr, spec); |
dd45c9cf6 printk: add %pM f... |
545 |
} |
cf3b429b0 vsprintf.c: use n... |
546 547 |
static noinline_for_stack char *ip4_string(char *p, const u8 *addr, const char *fmt) |
8a27f7c90 lib/vsprintf.c: A... |
548 549 |
{ int i; |
0159f24ee lib/vsprintf.c: A... |
550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 |
bool leading_zeros = (fmt[0] == 'i'); int index; int step; switch (fmt[2]) { case 'h': #ifdef __BIG_ENDIAN index = 0; step = 1; #else index = 3; step = -1; #endif break; case 'l': index = 3; step = -1; break; case 'n': case 'b': default: index = 0; step = 1; break; } |
8a27f7c90 lib/vsprintf.c: A... |
575 576 |
for (i = 0; i < 4; i++) { char temp[3]; /* hold each IP quad in reverse order */ |
0159f24ee lib/vsprintf.c: A... |
577 |
int digits = put_dec_trunc(temp, addr[index]) - temp; |
8a27f7c90 lib/vsprintf.c: A... |
578 579 580 581 582 583 584 585 586 587 588 |
if (leading_zeros) { if (digits < 3) *p++ = '0'; if (digits < 2) *p++ = '0'; } /* reverse the digits in the quad */ while (digits--) *p++ = temp[digits]; if (i < 3) *p++ = '.'; |
0159f24ee lib/vsprintf.c: A... |
589 |
index += step; |
8a27f7c90 lib/vsprintf.c: A... |
590 |
} |
8a27f7c90 lib/vsprintf.c: A... |
591 |
*p = '\0'; |
7b9186f5e vsprintf: give it... |
592 |
|
8a27f7c90 lib/vsprintf.c: A... |
593 594 |
return p; } |
cf3b429b0 vsprintf.c: use n... |
595 596 |
static noinline_for_stack char *ip6_compressed_string(char *p, const char *addr) |
689afa7da printk: add %p6 f... |
597 |
{ |
7b9186f5e vsprintf: give it... |
598 |
int i, j, range; |
8a27f7c90 lib/vsprintf.c: A... |
599 600 601 602 |
unsigned char zerolength[8]; int longest = 1; int colonpos = -1; u16 word; |
7b9186f5e vsprintf: give it... |
603 |
u8 hi, lo; |
8a27f7c90 lib/vsprintf.c: A... |
604 |
bool needcolon = false; |
eb78cd26b lib/vsprintf.c: A... |
605 606 607 608 609 610 |
bool useIPv4; struct in6_addr in6; memcpy(&in6, addr, sizeof(struct in6_addr)); useIPv4 = ipv6_addr_v4mapped(&in6) || ipv6_addr_is_isatap(&in6); |
8a27f7c90 lib/vsprintf.c: A... |
611 612 613 614 615 616 617 618 619 620 621 |
memset(zerolength, 0, sizeof(zerolength)); if (useIPv4) range = 6; else range = 8; /* find position of longest 0 run */ for (i = 0; i < range; i++) { for (j = i; j < range; j++) { |
eb78cd26b lib/vsprintf.c: A... |
622 |
if (in6.s6_addr16[j] != 0) |
8a27f7c90 lib/vsprintf.c: A... |
623 624 625 626 627 628 629 630 631 632 |
break; zerolength[i]++; } } for (i = 0; i < range; i++) { if (zerolength[i] > longest) { longest = zerolength[i]; colonpos = i; } } |
29cf519ee vsprintf: Update ... |
633 634 |
if (longest == 1) /* don't compress a single 0 */ colonpos = -1; |
689afa7da printk: add %p6 f... |
635 |
|
8a27f7c90 lib/vsprintf.c: A... |
636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 |
/* emit address */ for (i = 0; i < range; i++) { if (i == colonpos) { if (needcolon || i == 0) *p++ = ':'; *p++ = ':'; needcolon = false; i += longest - 1; continue; } if (needcolon) { *p++ = ':'; needcolon = false; } /* hex u16 without leading 0s */ |
eb78cd26b lib/vsprintf.c: A... |
651 |
word = ntohs(in6.s6_addr16[i]); |
8a27f7c90 lib/vsprintf.c: A... |
652 653 654 655 |
hi = word >> 8; lo = word & 0xff; if (hi) { if (hi > 0x0f) |
55036ba76 lib: rename pack_... |
656 |
p = hex_byte_pack(p, hi); |
8a27f7c90 lib/vsprintf.c: A... |
657 658 |
else *p++ = hex_asc_lo(hi); |
55036ba76 lib: rename pack_... |
659 |
p = hex_byte_pack(p, lo); |
8a27f7c90 lib/vsprintf.c: A... |
660 |
} |
b5ff992b0 vsprintf: reduce ... |
661 |
else if (lo > 0x0f) |
55036ba76 lib: rename pack_... |
662 |
p = hex_byte_pack(p, lo); |
8a27f7c90 lib/vsprintf.c: A... |
663 664 665 666 667 668 669 670 |
else *p++ = hex_asc_lo(lo); needcolon = true; } if (useIPv4) { if (needcolon) *p++ = ':'; |
0159f24ee lib/vsprintf.c: A... |
671 |
p = ip4_string(p, &in6.s6_addr[12], "I4"); |
8a27f7c90 lib/vsprintf.c: A... |
672 |
} |
8a27f7c90 lib/vsprintf.c: A... |
673 |
*p = '\0'; |
7b9186f5e vsprintf: give it... |
674 |
|
8a27f7c90 lib/vsprintf.c: A... |
675 676 |
return p; } |
cf3b429b0 vsprintf.c: use n... |
677 678 |
static noinline_for_stack char *ip6_string(char *p, const char *addr, const char *fmt) |
8a27f7c90 lib/vsprintf.c: A... |
679 680 |
{ int i; |
7b9186f5e vsprintf: give it... |
681 |
|
689afa7da printk: add %p6 f... |
682 |
for (i = 0; i < 8; i++) { |
55036ba76 lib: rename pack_... |
683 684 |
p = hex_byte_pack(p, *addr++); p = hex_byte_pack(p, *addr++); |
8a27f7c90 lib/vsprintf.c: A... |
685 |
if (fmt[0] == 'I' && i != 7) |
689afa7da printk: add %p6 f... |
686 687 688 |
*p++ = ':'; } *p = '\0'; |
7b9186f5e vsprintf: give it... |
689 |
|
8a27f7c90 lib/vsprintf.c: A... |
690 691 |
return p; } |
cf3b429b0 vsprintf.c: use n... |
692 693 694 |
static noinline_for_stack char *ip6_addr_string(char *buf, char *end, const u8 *addr, struct printf_spec spec, const char *fmt) |
8a27f7c90 lib/vsprintf.c: A... |
695 696 697 698 |
{ char ip6_addr[sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255")]; if (fmt[0] == 'I' && fmt[2] == 'c') |
eb78cd26b lib/vsprintf.c: A... |
699 |
ip6_compressed_string(ip6_addr, addr); |
8a27f7c90 lib/vsprintf.c: A... |
700 |
else |
eb78cd26b lib/vsprintf.c: A... |
701 |
ip6_string(ip6_addr, addr, fmt); |
689afa7da printk: add %p6 f... |
702 |
|
fef20d9c1 vsprintf: unify t... |
703 |
return string(buf, end, ip6_addr, spec); |
689afa7da printk: add %p6 f... |
704 |
} |
cf3b429b0 vsprintf.c: use n... |
705 706 707 |
static noinline_for_stack char *ip4_addr_string(char *buf, char *end, const u8 *addr, struct printf_spec spec, const char *fmt) |
4aa996066 printk: add %I4, ... |
708 |
{ |
8a27f7c90 lib/vsprintf.c: A... |
709 |
char ip4_addr[sizeof("255.255.255.255")]; |
4aa996066 printk: add %I4, ... |
710 |
|
0159f24ee lib/vsprintf.c: A... |
711 |
ip4_string(ip4_addr, addr, fmt); |
4aa996066 printk: add %I4, ... |
712 |
|
fef20d9c1 vsprintf: unify t... |
713 |
return string(buf, end, ip4_addr, spec); |
4aa996066 printk: add %I4, ... |
714 |
} |
cf3b429b0 vsprintf.c: use n... |
715 716 717 |
static noinline_for_stack char *uuid_string(char *buf, char *end, const u8 *addr, struct printf_spec spec, const char *fmt) |
9ac6e44ee lib/vsprintf.c: a... |
718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 |
{ char uuid[sizeof("xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx")]; char *p = uuid; int i; static const u8 be[16] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15}; static const u8 le[16] = {3,2,1,0,5,4,7,6,8,9,10,11,12,13,14,15}; const u8 *index = be; bool uc = false; switch (*(++fmt)) { case 'L': uc = true; /* fall-through */ case 'l': index = le; break; case 'B': uc = true; break; } for (i = 0; i < 16; i++) { |
55036ba76 lib: rename pack_... |
739 |
p = hex_byte_pack(p, addr[index[i]]); |
9ac6e44ee lib/vsprintf.c: a... |
740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 |
switch (i) { case 3: case 5: case 7: case 9: *p++ = '-'; break; } } *p = 0; if (uc) { p = uuid; do { *p = toupper(*p); } while (*(++p)); } return string(buf, end, uuid, spec); } |
c8f44affb net: introduce an... |
761 762 763 764 765 766 767 768 769 770 771 |
static char *netdev_feature_string(char *buf, char *end, const u8 *addr, struct printf_spec spec) { spec.flags |= SPECIAL | SMALL | ZEROPAD; if (spec.field_width == -1) spec.field_width = 2 + 2 * sizeof(netdev_features_t); spec.base = 16; return number(buf, end, *(const netdev_features_t *)addr, spec); } |
411f05f12 vsprintf: Turn kp... |
772 |
int kptr_restrict __read_mostly; |
455cd5ab3 kptr_restrict for... |
773 |
|
4d8a743cd vsprintf: add inf... |
774 775 776 777 778 |
/* * Show a '%p' thing. A kernel extension is that the '%p' is followed * by an extra set of alphanumeric characters that are extended format * specifiers. * |
332d2e783 Implement %pR to ... |
779 780 |
* Right now we handle: * |
0c8b946e3 vsprintf: introdu... |
781 782 |
* - 'F' For symbolic function descriptor pointers with offset * - 'f' For simple symbolic function names without offset |
0efb4d207 vsnprintf: remove... |
783 784 |
* - 'S' For symbolic direct pointers with offset * - 's' For symbolic direct pointers without offset |
0f77a8d37 vsprintf: Introdu... |
785 |
* - 'B' For backtraced symbolic direct pointers with offset |
c7dabef8a vsprintf: use %pR... |
786 787 |
* - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref] * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201] |
dd45c9cf6 printk: add %pM f... |
788 789 |
* - 'M' For a 6-byte MAC address, it prints the address in the * usual colon-separated hex notation |
8a27f7c90 lib/vsprintf.c: A... |
790 |
* - 'm' For a 6-byte MAC address, it prints the hex address without colons |
bc7259a2c lib/vsprintf.c: A... |
791 |
* - 'MF' For a 6-byte MAC FDDI address, it prints the address |
c8e000604 lib: Kill bit-rev... |
792 |
* with a dash-separated hex notation |
8a27f7c90 lib/vsprintf.c: A... |
793 794 795 796 797 798 |
* - 'I' [46] for IPv4/IPv6 addresses printed in the usual way * IPv4 uses dot-separated decimal without leading 0's (1.2.3.4) * IPv6 uses colon separated network-order 16 bit hex with leading 0's * - 'i' [46] for 'raw' IPv4/IPv6 addresses * IPv6 omits the colons (01020304...0f) * IPv4 uses dot-separated decimal with leading 0's (010.123.045.006) |
0159f24ee lib/vsprintf.c: A... |
799 |
* - '[Ii]4[hnbl]' IPv4 addresses in host, network, big or little endian order |
8a27f7c90 lib/vsprintf.c: A... |
800 |
* - 'I6c' for IPv6 addresses printed as specified by |
29cf519ee vsprintf: Update ... |
801 |
* http://tools.ietf.org/html/rfc5952 |
9ac6e44ee lib/vsprintf.c: a... |
802 803 804 805 806 807 808 809 810 811 812 |
* - 'U' For a 16 byte UUID/GUID, it prints the UUID/GUID in the form * "xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx" * Options for %pU are: * b big endian lower case hex (default) * B big endian UPPER case hex * l little endian lower case hex * L little endian UPPER case hex * big endian output byte order is: * [0][1][2][3]-[4][5]-[6][7]-[8][9]-[10][11][12][13][14][15] * little endian output byte order is: * [3][2][1][0]-[5][4]-[7][6]-[8][9]-[10][11][12][13][14][15] |
7db6f5fb6 vsprintf: Recursi... |
813 814 815 816 817 |
* - 'V' For a struct va_format which contains a format string * and va_list *, * call vsnprintf(->format, *->va_list). * Implements a "recursive vsnprintf". * Do not use this feature without some mechanism to verify the * correctness of the format string and va_list arguments. |
455cd5ab3 kptr_restrict for... |
818 |
* - 'K' For a kernel pointer that should be hidden from unprivileged users |
c8f44affb net: introduce an... |
819 |
* - 'NF' For a netdev_features_t |
9ac6e44ee lib/vsprintf.c: a... |
820 |
* |
332d2e783 Implement %pR to ... |
821 822 823 |
* Note: The difference between 'S' and 'F' is that on ia64 and ppc64 * function pointers are really function descriptors, which contain a * pointer to the real address. |
4d8a743cd vsprintf: add inf... |
824 |
*/ |
cf3b429b0 vsprintf.c: use n... |
825 826 827 |
static noinline_for_stack char *pointer(const char *fmt, char *buf, char *end, void *ptr, struct printf_spec spec) |
78a8bf69b vsprintf: split o... |
828 |
{ |
9f36e2c44 printk: use %pK f... |
829 |
if (!ptr && *fmt != 'K') { |
5e0579812 vsprintf.c: use d... |
830 831 832 833 834 835 |
/* * Print (null) with the same width as a pointer so it makes * tabular output look nice. */ if (spec.field_width == -1) spec.field_width = 2 * sizeof(void *); |
fef20d9c1 vsprintf: unify t... |
836 |
return string(buf, end, "(null)", spec); |
5e0579812 vsprintf.c: use d... |
837 |
} |
d97106ab5 Make %p print '(n... |
838 |
|
0fe1ef24f vsprintf: add sup... |
839 840 |
switch (*fmt) { case 'F': |
0c8b946e3 vsprintf: introdu... |
841 |
case 'f': |
0fe1ef24f vsprintf: add sup... |
842 843 844 |
ptr = dereference_function_descriptor(ptr); /* Fallthrough */ case 'S': |
9ac6e44ee lib/vsprintf.c: a... |
845 |
case 's': |
0f77a8d37 vsprintf: Introdu... |
846 |
case 'B': |
0c8b946e3 vsprintf: introdu... |
847 |
return symbol_string(buf, end, ptr, spec, *fmt); |
332d2e783 Implement %pR to ... |
848 |
case 'R': |
c7dabef8a vsprintf: use %pR... |
849 |
case 'r': |
fd95541e2 vsprintf: add %pR... |
850 |
return resource_string(buf, end, ptr, spec, fmt); |
8a27f7c90 lib/vsprintf.c: A... |
851 852 |
case 'M': /* Colon separated: 00:01:02:03:04:05 */ case 'm': /* Contiguous: 000102030405 */ |
bc7259a2c lib/vsprintf.c: A... |
853 |
/* [mM]F (FDDI, bit reversed) */ |
8a27f7c90 lib/vsprintf.c: A... |
854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 |
return mac_address_string(buf, end, ptr, spec, fmt); case 'I': /* Formatted IP supported * 4: 1.2.3.4 * 6: 0001:0203:...:0708 * 6c: 1::708 or 1::1.2.3.4 */ case 'i': /* Contiguous: * 4: 001.002.003.004 * 6: 000102...0f */ switch (fmt[1]) { case '6': return ip6_addr_string(buf, end, ptr, spec, fmt); case '4': return ip4_addr_string(buf, end, ptr, spec, fmt); } |
fef20d9c1 vsprintf: unify t... |
870 |
break; |
9ac6e44ee lib/vsprintf.c: a... |
871 872 |
case 'U': return uuid_string(buf, end, ptr, spec, fmt); |
7db6f5fb6 vsprintf: Recursi... |
873 |
case 'V': |
d9be9b90d lib/vsprintf.c: f... |
874 |
return buf + vsnprintf(buf, end > buf ? end - buf : 0, |
7db6f5fb6 vsprintf: Recursi... |
875 876 |
((struct va_format *)ptr)->fmt, *(((struct va_format *)ptr)->va)); |
455cd5ab3 kptr_restrict for... |
877 878 879 880 881 882 883 884 885 |
case 'K': /* * %pK cannot be used in IRQ context because its test * for CAP_SYSLOG would be meaningless. */ if (in_irq() || in_serving_softirq() || in_nmi()) { if (spec.field_width == -1) spec.field_width = 2 * sizeof(void *); return string(buf, end, "pK-error", spec); |
455cd5ab3 kptr_restrict for... |
886 |
} |
26297607e vsprintf: neaten ... |
887 888 889 890 891 |
if (!((kptr_restrict == 0) || (kptr_restrict == 1 && has_capability_noaudit(current, CAP_SYSLOG)))) ptr = NULL; break; |
c8f44affb net: introduce an... |
892 893 894 895 896 897 |
case 'N': switch (fmt[1]) { case 'F': return netdev_feature_string(buf, end, ptr, spec); } break; |
fef20d9c1 vsprintf: unify t... |
898 899 900 |
} spec.flags |= SMALL; if (spec.field_width == -1) { |
5e0579812 vsprintf.c: use d... |
901 |
spec.field_width = 2 * sizeof(void *); |
fef20d9c1 vsprintf: unify t... |
902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 |
spec.flags |= ZEROPAD; } spec.base = 16; return number(buf, end, (unsigned long) ptr, spec); } /* * Helper function to decode printf style format. * Each call decode a token from the format and return the * number of characters read (or likely the delta where it wants * to go on the next call). * The decoded token is returned through the parameters * * 'h', 'l', or 'L' for integer fields * 'z' support added 23/7/1999 S.H. * 'z' changed to 'Z' --davidm 1/25/99 * 't' added for ptrdiff_t * * @fmt: the format string * @type of the token returned * @flags: various flags such as +, -, # tokens.. * @field_width: overwritten width * @base: base of the number (octal, hex, ...) * @precision: precision of a number * @qualifier: qualifier of a number (long, size_t, ...) */ |
cf3b429b0 vsprintf.c: use n... |
929 930 |
static noinline_for_stack int format_decode(const char *fmt, struct printf_spec *spec) |
fef20d9c1 vsprintf: unify t... |
931 932 |
{ const char *start = fmt; |
fef20d9c1 vsprintf: unify t... |
933 934 |
/* we finished early by reading the field width */ |
ed681a91a vsprintf: unify t... |
935 |
if (spec->type == FORMAT_TYPE_WIDTH) { |
fef20d9c1 vsprintf: unify t... |
936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 |
if (spec->field_width < 0) { spec->field_width = -spec->field_width; spec->flags |= LEFT; } spec->type = FORMAT_TYPE_NONE; goto precision; } /* we finished early by reading the precision */ if (spec->type == FORMAT_TYPE_PRECISION) { if (spec->precision < 0) spec->precision = 0; spec->type = FORMAT_TYPE_NONE; goto qualifier; } /* By default */ spec->type = FORMAT_TYPE_NONE; for (; *fmt ; ++fmt) { if (*fmt == '%') break; } /* Return the current non-format string */ if (fmt != start || !*fmt) return fmt - start; /* Process flags */ spec->flags = 0; while (1) { /* this also skips first '%' */ bool found = true; ++fmt; switch (*fmt) { case '-': spec->flags |= LEFT; break; case '+': spec->flags |= PLUS; break; case ' ': spec->flags |= SPACE; break; case '#': spec->flags |= SPECIAL; break; case '0': spec->flags |= ZEROPAD; break; default: found = false; } if (!found) break; } /* get field width */ spec->field_width = -1; if (isdigit(*fmt)) spec->field_width = skip_atoi(&fmt); else if (*fmt == '*') { /* it's the next argument */ |
ed681a91a vsprintf: unify t... |
993 |
spec->type = FORMAT_TYPE_WIDTH; |
fef20d9c1 vsprintf: unify t... |
994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 |
return ++fmt - start; } precision: /* get the precision */ spec->precision = -1; if (*fmt == '.') { ++fmt; if (isdigit(*fmt)) { spec->precision = skip_atoi(&fmt); if (spec->precision < 0) spec->precision = 0; } else if (*fmt == '*') { /* it's the next argument */ |
adf26f84a fix regression fr... |
1008 |
spec->type = FORMAT_TYPE_PRECISION; |
fef20d9c1 vsprintf: unify t... |
1009 1010 1011 1012 1013 1014 1015 |
return ++fmt - start; } } qualifier: /* get the conversion qualifier */ spec->qualifier = -1; |
75fb8f269 lib: make _tolowe... |
1016 1017 |
if (*fmt == 'h' || _tolower(*fmt) == 'l' || _tolower(*fmt) == 'z' || *fmt == 't') { |
a4e94ef0d printk: add suppo... |
1018 1019 1020 1021 1022 1023 1024 1025 1026 |
spec->qualifier = *fmt++; if (unlikely(spec->qualifier == *fmt)) { if (spec->qualifier == 'l') { spec->qualifier = 'L'; ++fmt; } else if (spec->qualifier == 'h') { spec->qualifier = 'H'; ++fmt; } |
fef20d9c1 vsprintf: unify t... |
1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 |
} } /* default base */ spec->base = 10; switch (*fmt) { case 'c': spec->type = FORMAT_TYPE_CHAR; return ++fmt - start; case 's': spec->type = FORMAT_TYPE_STR; return ++fmt - start; case 'p': spec->type = FORMAT_TYPE_PTR; return fmt - start; /* skip alnum */ case 'n': spec->type = FORMAT_TYPE_NRCHARS; return ++fmt - start; case '%': spec->type = FORMAT_TYPE_PERCENT_CHAR; return ++fmt - start; /* integer number formats - set up the flags and "break" */ case 'o': spec->base = 8; break; case 'x': spec->flags |= SMALL; case 'X': spec->base = 16; break; case 'd': case 'i': |
39e874f8a vsprintf: fix bug... |
1068 |
spec->flags |= SIGN; |
fef20d9c1 vsprintf: unify t... |
1069 |
case 'u': |
4aa996066 printk: add %I4, ... |
1070 |
break; |
fef20d9c1 vsprintf: unify t... |
1071 1072 1073 1074 |
default: spec->type = FORMAT_TYPE_INVALID; return fmt - start; |
0fe1ef24f vsprintf: add sup... |
1075 |
} |
fef20d9c1 vsprintf: unify t... |
1076 1077 1078 1079 |
if (spec->qualifier == 'L') spec->type = FORMAT_TYPE_LONG_LONG; else if (spec->qualifier == 'l') { |
39e874f8a vsprintf: fix bug... |
1080 |
if (spec->flags & SIGN) |
fef20d9c1 vsprintf: unify t... |
1081 1082 1083 |
spec->type = FORMAT_TYPE_LONG; else spec->type = FORMAT_TYPE_ULONG; |
75fb8f269 lib: make _tolowe... |
1084 |
} else if (_tolower(spec->qualifier) == 'z') { |
fef20d9c1 vsprintf: unify t... |
1085 1086 1087 |
spec->type = FORMAT_TYPE_SIZE_T; } else if (spec->qualifier == 't') { spec->type = FORMAT_TYPE_PTRDIFF; |
a4e94ef0d printk: add suppo... |
1088 1089 1090 1091 1092 |
} else if (spec->qualifier == 'H') { if (spec->flags & SIGN) spec->type = FORMAT_TYPE_BYTE; else spec->type = FORMAT_TYPE_UBYTE; |
fef20d9c1 vsprintf: unify t... |
1093 |
} else if (spec->qualifier == 'h') { |
39e874f8a vsprintf: fix bug... |
1094 |
if (spec->flags & SIGN) |
fef20d9c1 vsprintf: unify t... |
1095 1096 1097 1098 |
spec->type = FORMAT_TYPE_SHORT; else spec->type = FORMAT_TYPE_USHORT; } else { |
39e874f8a vsprintf: fix bug... |
1099 |
if (spec->flags & SIGN) |
fef20d9c1 vsprintf: unify t... |
1100 1101 1102 |
spec->type = FORMAT_TYPE_INT; else spec->type = FORMAT_TYPE_UINT; |
78a8bf69b vsprintf: split o... |
1103 |
} |
fef20d9c1 vsprintf: unify t... |
1104 1105 |
return ++fmt - start; |
78a8bf69b vsprintf: split o... |
1106 |
} |
1da177e4c Linux-2.6.12-rc2 |
1107 1108 1109 1110 1111 1112 1113 |
/** * vsnprintf - Format a string and place it in a buffer * @buf: The buffer to place the result into * @size: The size of the buffer, including the trailing null space * @fmt: The format string to use * @args: Arguments for the format string * |
20036fdca Add kerneldoc doc... |
1114 |
* This function follows C99 vsnprintf, but has some extensions: |
91adcd2c4 vsprintf: add %ps... |
1115 1116 |
* %pS output the name of a text symbol with offset * %ps output the name of a text symbol without offset |
0c8b946e3 vsprintf: introdu... |
1117 1118 |
* %pF output the name of a function pointer with its offset * %pf output the name of a function pointer without its offset |
0f77a8d37 vsprintf: Introdu... |
1119 |
* %pB output the name of a backtrace symbol with its offset |
8a79503aa lib/vsprintf.c: d... |
1120 1121 1122 1123 1124 1125 1126 1127 |
* %pR output the address range in a struct resource with decoded flags * %pr output the address range in a struct resource with raw flags * %pM output a 6-byte MAC address with colons * %pm output a 6-byte MAC address without colons * %pI4 print an IPv4 address without leading zeros * %pi4 print an IPv4 address with leading zeros * %pI6 print an IPv6 address with colons * %pi6 print an IPv6 address without colons |
f996f2081 lib/vsprintf: rep... |
1128 |
* %pI6c print an IPv6 address as specified by RFC 5952 |
8a79503aa lib/vsprintf.c: d... |
1129 1130 |
* %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper * case. |
0efb4d207 vsnprintf: remove... |
1131 |
* %n is ignored |
20036fdca Add kerneldoc doc... |
1132 |
* |
1da177e4c Linux-2.6.12-rc2 |
1133 1134 1135 1136 |
* The return value is the number of characters which would * be generated for the given input, excluding the trailing * '\0', as per ISO C99. If you want to have the exact * number of characters written into @buf as return value |
72fd4a35a [PATCH] Numerous ... |
1137 |
* (not including the trailing '\0'), use vscnprintf(). If the |
1da177e4c Linux-2.6.12-rc2 |
1138 1139 1140 |
* return is greater than or equal to @size, the resulting * string is truncated. * |
ba1835eb3 vsprintf: make co... |
1141 |
* If you're not already dealing with a va_list consider using snprintf(). |
1da177e4c Linux-2.6.12-rc2 |
1142 1143 1144 |
*/ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) { |
1da177e4c Linux-2.6.12-rc2 |
1145 |
unsigned long long num; |
d4be151b2 vsprintf: move lo... |
1146 |
char *str, *end; |
fef20d9c1 vsprintf: unify t... |
1147 |
struct printf_spec spec = {0}; |
1da177e4c Linux-2.6.12-rc2 |
1148 |
|
f796937a0 [PATCH] Fix bound... |
1149 1150 |
/* Reject out-of-range values early. Large positive sizes are used for unknown buffer sizes. */ |
2f30b1f9e vsprintf: use WAR... |
1151 |
if (WARN_ON_ONCE((int) size < 0)) |
1da177e4c Linux-2.6.12-rc2 |
1152 |
return 0; |
1da177e4c Linux-2.6.12-rc2 |
1153 1154 |
str = buf; |
f796937a0 [PATCH] Fix bound... |
1155 |
end = buf + size; |
1da177e4c Linux-2.6.12-rc2 |
1156 |
|
f796937a0 [PATCH] Fix bound... |
1157 1158 1159 1160 |
/* Make sure end is always >= buf */ if (end < buf) { end = ((void *)-1); size = end - buf; |
1da177e4c Linux-2.6.12-rc2 |
1161 |
} |
fef20d9c1 vsprintf: unify t... |
1162 1163 |
while (*fmt) { const char *old_fmt = fmt; |
d4be151b2 vsprintf: move lo... |
1164 |
int read = format_decode(fmt, &spec); |
1da177e4c Linux-2.6.12-rc2 |
1165 |
|
fef20d9c1 vsprintf: unify t... |
1166 |
fmt += read; |
1da177e4c Linux-2.6.12-rc2 |
1167 |
|
fef20d9c1 vsprintf: unify t... |
1168 1169 1170 1171 1172 1173 1174 |
switch (spec.type) { case FORMAT_TYPE_NONE: { int copy = read; if (str < end) { if (copy > end - str) copy = end - str; memcpy(str, old_fmt, copy); |
1da177e4c Linux-2.6.12-rc2 |
1175 |
} |
fef20d9c1 vsprintf: unify t... |
1176 1177 |
str += read; break; |
1da177e4c Linux-2.6.12-rc2 |
1178 |
} |
ed681a91a vsprintf: unify t... |
1179 |
case FORMAT_TYPE_WIDTH: |
fef20d9c1 vsprintf: unify t... |
1180 1181 |
spec.field_width = va_arg(args, int); break; |
1da177e4c Linux-2.6.12-rc2 |
1182 |
|
fef20d9c1 vsprintf: unify t... |
1183 1184 1185 |
case FORMAT_TYPE_PRECISION: spec.precision = va_arg(args, int); break; |
1da177e4c Linux-2.6.12-rc2 |
1186 |
|
d4be151b2 vsprintf: move lo... |
1187 1188 |
case FORMAT_TYPE_CHAR: { char c; |
fef20d9c1 vsprintf: unify t... |
1189 1190 |
if (!(spec.flags & LEFT)) { while (--spec.field_width > 0) { |
f796937a0 [PATCH] Fix bound... |
1191 |
if (str < end) |
1da177e4c Linux-2.6.12-rc2 |
1192 1193 |
*str = ' '; ++str; |
1da177e4c Linux-2.6.12-rc2 |
1194 |
|
fef20d9c1 vsprintf: unify t... |
1195 1196 1197 1198 1199 1200 1201 |
} } c = (unsigned char) va_arg(args, int); if (str < end) *str = c; ++str; while (--spec.field_width > 0) { |
f796937a0 [PATCH] Fix bound... |
1202 |
if (str < end) |
fef20d9c1 vsprintf: unify t... |
1203 |
*str = ' '; |
1da177e4c Linux-2.6.12-rc2 |
1204 |
++str; |
fef20d9c1 vsprintf: unify t... |
1205 1206 |
} break; |
d4be151b2 vsprintf: move lo... |
1207 |
} |
1da177e4c Linux-2.6.12-rc2 |
1208 |
|
fef20d9c1 vsprintf: unify t... |
1209 1210 1211 |
case FORMAT_TYPE_STR: str = string(str, end, va_arg(args, char *), spec); break; |
1da177e4c Linux-2.6.12-rc2 |
1212 |
|
fef20d9c1 vsprintf: unify t... |
1213 1214 1215 1216 1217 1218 |
case FORMAT_TYPE_PTR: str = pointer(fmt+1, str, end, va_arg(args, void *), spec); while (isalnum(*fmt)) fmt++; break; |
1da177e4c Linux-2.6.12-rc2 |
1219 |
|
fef20d9c1 vsprintf: unify t... |
1220 1221 1222 1223 1224 |
case FORMAT_TYPE_PERCENT_CHAR: if (str < end) *str = '%'; ++str; break; |
1da177e4c Linux-2.6.12-rc2 |
1225 |
|
fef20d9c1 vsprintf: unify t... |
1226 1227 1228 1229 |
case FORMAT_TYPE_INVALID: if (str < end) *str = '%'; ++str; |
fef20d9c1 vsprintf: unify t... |
1230 1231 1232 |
break; case FORMAT_TYPE_NRCHARS: { |
ef0658f3d vsprintf.c: Reduc... |
1233 |
u8 qualifier = spec.qualifier; |
fef20d9c1 vsprintf: unify t... |
1234 1235 1236 1237 |
if (qualifier == 'l') { long *ip = va_arg(args, long *); *ip = (str - buf); |
75fb8f269 lib: make _tolowe... |
1238 |
} else if (_tolower(qualifier) == 'z') { |
fef20d9c1 vsprintf: unify t... |
1239 1240 1241 1242 1243 1244 1245 |
size_t *ip = va_arg(args, size_t *); *ip = (str - buf); } else { int *ip = va_arg(args, int *); *ip = (str - buf); } break; |
1da177e4c Linux-2.6.12-rc2 |
1246 |
} |
fef20d9c1 vsprintf: unify t... |
1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 |
default: switch (spec.type) { case FORMAT_TYPE_LONG_LONG: num = va_arg(args, long long); break; case FORMAT_TYPE_ULONG: num = va_arg(args, unsigned long); break; case FORMAT_TYPE_LONG: num = va_arg(args, long); break; case FORMAT_TYPE_SIZE_T: num = va_arg(args, size_t); break; case FORMAT_TYPE_PTRDIFF: num = va_arg(args, ptrdiff_t); break; |
a4e94ef0d printk: add suppo... |
1265 1266 1267 1268 1269 1270 |
case FORMAT_TYPE_UBYTE: num = (unsigned char) va_arg(args, int); break; case FORMAT_TYPE_BYTE: num = (signed char) va_arg(args, int); break; |
fef20d9c1 vsprintf: unify t... |
1271 1272 1273 1274 1275 1276 |
case FORMAT_TYPE_USHORT: num = (unsigned short) va_arg(args, int); break; case FORMAT_TYPE_SHORT: num = (short) va_arg(args, int); break; |
39e874f8a vsprintf: fix bug... |
1277 1278 |
case FORMAT_TYPE_INT: num = (int) va_arg(args, int); |
fef20d9c1 vsprintf: unify t... |
1279 1280 1281 1282 1283 1284 |
break; default: num = va_arg(args, unsigned int); } str = number(str, end, num, spec); |
1da177e4c Linux-2.6.12-rc2 |
1285 |
} |
1da177e4c Linux-2.6.12-rc2 |
1286 |
} |
fef20d9c1 vsprintf: unify t... |
1287 |
|
f796937a0 [PATCH] Fix bound... |
1288 1289 1290 1291 |
if (size > 0) { if (str < end) *str = '\0'; else |
0a6047eef Fix vsnprintf off... |
1292 |
end[-1] = '\0'; |
f796937a0 [PATCH] Fix bound... |
1293 |
} |
fef20d9c1 vsprintf: unify t... |
1294 |
|
f796937a0 [PATCH] Fix bound... |
1295 |
/* the trailing null byte doesn't count towards the total */ |
1da177e4c Linux-2.6.12-rc2 |
1296 |
return str-buf; |
fef20d9c1 vsprintf: unify t... |
1297 |
|
1da177e4c Linux-2.6.12-rc2 |
1298 |
} |
1da177e4c Linux-2.6.12-rc2 |
1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 |
EXPORT_SYMBOL(vsnprintf); /** * vscnprintf - Format a string and place it in a buffer * @buf: The buffer to place the result into * @size: The size of the buffer, including the trailing null space * @fmt: The format string to use * @args: Arguments for the format string * * The return value is the number of characters which have been written into |
b921c69fb lib/vsprintf.c: f... |
1309 |
* the @buf not including the trailing '\0'. If @size is == 0 the function |
1da177e4c Linux-2.6.12-rc2 |
1310 1311 |
* returns 0. * |
ba1835eb3 vsprintf: make co... |
1312 |
* If you're not already dealing with a va_list consider using scnprintf(). |
20036fdca Add kerneldoc doc... |
1313 1314 |
* * See the vsnprintf() documentation for format string extensions over C99. |
1da177e4c Linux-2.6.12-rc2 |
1315 1316 1317 1318 |
*/ int vscnprintf(char *buf, size_t size, const char *fmt, va_list args) { int i; |
7b9186f5e vsprintf: give it... |
1319 |
i = vsnprintf(buf, size, fmt, args); |
b921c69fb lib/vsprintf.c: f... |
1320 1321 1322 1323 1324 |
if (likely(i < size)) return i; if (size != 0) return size - 1; return 0; |
1da177e4c Linux-2.6.12-rc2 |
1325 |
} |
1da177e4c Linux-2.6.12-rc2 |
1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 |
EXPORT_SYMBOL(vscnprintf); /** * snprintf - Format a string and place it in a buffer * @buf: The buffer to place the result into * @size: The size of the buffer, including the trailing null space * @fmt: The format string to use * @...: Arguments for the format string * * The return value is the number of characters which would be * generated for the given input, excluding the trailing null, * as per ISO C99. If the return is greater than or equal to * @size, the resulting string is truncated. |
20036fdca Add kerneldoc doc... |
1339 1340 |
* * See the vsnprintf() documentation for format string extensions over C99. |
1da177e4c Linux-2.6.12-rc2 |
1341 |
*/ |
7b9186f5e vsprintf: give it... |
1342 |
int snprintf(char *buf, size_t size, const char *fmt, ...) |
1da177e4c Linux-2.6.12-rc2 |
1343 1344 1345 1346 1347 |
{ va_list args; int i; va_start(args, fmt); |
7b9186f5e vsprintf: give it... |
1348 |
i = vsnprintf(buf, size, fmt, args); |
1da177e4c Linux-2.6.12-rc2 |
1349 |
va_end(args); |
7b9186f5e vsprintf: give it... |
1350 |
|
1da177e4c Linux-2.6.12-rc2 |
1351 1352 |
return i; } |
1da177e4c Linux-2.6.12-rc2 |
1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 |
EXPORT_SYMBOL(snprintf); /** * scnprintf - Format a string and place it in a buffer * @buf: The buffer to place the result into * @size: The size of the buffer, including the trailing null space * @fmt: The format string to use * @...: Arguments for the format string * * The return value is the number of characters written into @buf not including |
b903c0b88 lib: fix scnprint... |
1363 |
* the trailing '\0'. If @size is == 0 the function returns 0. |
1da177e4c Linux-2.6.12-rc2 |
1364 |
*/ |
7b9186f5e vsprintf: give it... |
1365 |
int scnprintf(char *buf, size_t size, const char *fmt, ...) |
1da177e4c Linux-2.6.12-rc2 |
1366 1367 1368 1369 1370 |
{ va_list args; int i; va_start(args, fmt); |
b921c69fb lib/vsprintf.c: f... |
1371 |
i = vscnprintf(buf, size, fmt, args); |
1da177e4c Linux-2.6.12-rc2 |
1372 |
va_end(args); |
7b9186f5e vsprintf: give it... |
1373 |
|
b921c69fb lib/vsprintf.c: f... |
1374 |
return i; |
1da177e4c Linux-2.6.12-rc2 |
1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 |
} EXPORT_SYMBOL(scnprintf); /** * vsprintf - Format a string and place it in a buffer * @buf: The buffer to place the result into * @fmt: The format string to use * @args: Arguments for the format string * * The function returns the number of characters written |
72fd4a35a [PATCH] Numerous ... |
1385 |
* into @buf. Use vsnprintf() or vscnprintf() in order to avoid |
1da177e4c Linux-2.6.12-rc2 |
1386 1387 |
* buffer overflows. * |
ba1835eb3 vsprintf: make co... |
1388 |
* If you're not already dealing with a va_list consider using sprintf(). |
20036fdca Add kerneldoc doc... |
1389 1390 |
* * See the vsnprintf() documentation for format string extensions over C99. |
1da177e4c Linux-2.6.12-rc2 |
1391 1392 1393 1394 1395 |
*/ int vsprintf(char *buf, const char *fmt, va_list args) { return vsnprintf(buf, INT_MAX, fmt, args); } |
1da177e4c Linux-2.6.12-rc2 |
1396 1397 1398 1399 1400 1401 1402 1403 1404 |
EXPORT_SYMBOL(vsprintf); /** * sprintf - Format a string and place it in a buffer * @buf: The buffer to place the result into * @fmt: The format string to use * @...: Arguments for the format string * * The function returns the number of characters written |
72fd4a35a [PATCH] Numerous ... |
1405 |
* into @buf. Use snprintf() or scnprintf() in order to avoid |
1da177e4c Linux-2.6.12-rc2 |
1406 |
* buffer overflows. |
20036fdca Add kerneldoc doc... |
1407 1408 |
* * See the vsnprintf() documentation for format string extensions over C99. |
1da177e4c Linux-2.6.12-rc2 |
1409 |
*/ |
7b9186f5e vsprintf: give it... |
1410 |
int sprintf(char *buf, const char *fmt, ...) |
1da177e4c Linux-2.6.12-rc2 |
1411 1412 1413 1414 1415 |
{ va_list args; int i; va_start(args, fmt); |
7b9186f5e vsprintf: give it... |
1416 |
i = vsnprintf(buf, INT_MAX, fmt, args); |
1da177e4c Linux-2.6.12-rc2 |
1417 |
va_end(args); |
7b9186f5e vsprintf: give it... |
1418 |
|
1da177e4c Linux-2.6.12-rc2 |
1419 1420 |
return i; } |
1da177e4c Linux-2.6.12-rc2 |
1421 |
EXPORT_SYMBOL(sprintf); |
4370aa4aa vsprintf: add bin... |
1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 |
#ifdef CONFIG_BINARY_PRINTF /* * bprintf service: * vbin_printf() - VA arguments to binary data * bstr_printf() - Binary data to text string */ /** * vbin_printf - Parse a format string and place args' binary value in a buffer * @bin_buf: The buffer to place args' binary value * @size: The size of the buffer(by words(32bits), not characters) * @fmt: The format string to use * @args: Arguments for the format string * * The format follows C99 vsnprintf, except %n is ignored, and its argument * is skiped. * * The return value is the number of words(32bits) which would be generated for * the given input. * * NOTE: * If the return value is greater than @size, the resulting bin_buf is NOT * valid for bstr_printf(). */ int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args) { |
fef20d9c1 vsprintf: unify t... |
1448 |
struct printf_spec spec = {0}; |
4370aa4aa vsprintf: add bin... |
1449 |
char *str, *end; |
4370aa4aa vsprintf: add bin... |
1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 |
str = (char *)bin_buf; end = (char *)(bin_buf + size); #define save_arg(type) \ do { \ if (sizeof(type) == 8) { \ unsigned long long value; \ str = PTR_ALIGN(str, sizeof(u32)); \ value = va_arg(args, unsigned long long); \ if (str + sizeof(type) <= end) { \ *(u32 *)str = *(u32 *)&value; \ *(u32 *)(str + 4) = *((u32 *)&value + 1); \ } \ } else { \ unsigned long value; \ str = PTR_ALIGN(str, sizeof(type)); \ value = va_arg(args, int); \ if (str + sizeof(type) <= end) \ *(typeof(type) *)str = (type)value; \ } \ str += sizeof(type); \ } while (0) |
fef20d9c1 vsprintf: unify t... |
1473 |
while (*fmt) { |
d4be151b2 vsprintf: move lo... |
1474 |
int read = format_decode(fmt, &spec); |
4370aa4aa vsprintf: add bin... |
1475 |
|
fef20d9c1 vsprintf: unify t... |
1476 |
fmt += read; |
4370aa4aa vsprintf: add bin... |
1477 |
|
fef20d9c1 vsprintf: unify t... |
1478 1479 |
switch (spec.type) { case FORMAT_TYPE_NONE: |
d4be151b2 vsprintf: move lo... |
1480 1481 |
case FORMAT_TYPE_INVALID: case FORMAT_TYPE_PERCENT_CHAR: |
fef20d9c1 vsprintf: unify t... |
1482 |
break; |
ed681a91a vsprintf: unify t... |
1483 |
case FORMAT_TYPE_WIDTH: |
fef20d9c1 vsprintf: unify t... |
1484 1485 1486 1487 1488 |
case FORMAT_TYPE_PRECISION: save_arg(int); break; case FORMAT_TYPE_CHAR: |
4370aa4aa vsprintf: add bin... |
1489 |
save_arg(char); |
fef20d9c1 vsprintf: unify t... |
1490 1491 1492 |
break; case FORMAT_TYPE_STR: { |
4370aa4aa vsprintf: add bin... |
1493 1494 |
const char *save_str = va_arg(args, char *); size_t len; |
6c3566341 vsprintf: pre-cal... |
1495 |
|
4370aa4aa vsprintf: add bin... |
1496 1497 |
if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE || (unsigned long)save_str < PAGE_SIZE) |
0f4f81dce vsprintf: factori... |
1498 |
save_str = "(null)"; |
6c3566341 vsprintf: pre-cal... |
1499 1500 1501 1502 |
len = strlen(save_str) + 1; if (str + len < end) memcpy(str, save_str, len); str += len; |
fef20d9c1 vsprintf: unify t... |
1503 |
break; |
4370aa4aa vsprintf: add bin... |
1504 |
} |
fef20d9c1 vsprintf: unify t... |
1505 1506 |
case FORMAT_TYPE_PTR: |
4370aa4aa vsprintf: add bin... |
1507 1508 |
save_arg(void *); /* skip all alphanumeric pointer suffixes */ |
fef20d9c1 vsprintf: unify t... |
1509 |
while (isalnum(*fmt)) |
4370aa4aa vsprintf: add bin... |
1510 |
fmt++; |
fef20d9c1 vsprintf: unify t... |
1511 |
break; |
fef20d9c1 vsprintf: unify t... |
1512 |
case FORMAT_TYPE_NRCHARS: { |
4370aa4aa vsprintf: add bin... |
1513 |
/* skip %n 's argument */ |
ef0658f3d vsprintf.c: Reduc... |
1514 |
u8 qualifier = spec.qualifier; |
4370aa4aa vsprintf: add bin... |
1515 1516 1517 |
void *skip_arg; if (qualifier == 'l') skip_arg = va_arg(args, long *); |
75fb8f269 lib: make _tolowe... |
1518 |
else if (_tolower(qualifier) == 'z') |
4370aa4aa vsprintf: add bin... |
1519 1520 1521 |
skip_arg = va_arg(args, size_t *); else skip_arg = va_arg(args, int *); |
fef20d9c1 vsprintf: unify t... |
1522 |
break; |
4370aa4aa vsprintf: add bin... |
1523 |
} |
fef20d9c1 vsprintf: unify t... |
1524 1525 1526 1527 1528 |
default: switch (spec.type) { case FORMAT_TYPE_LONG_LONG: |
4370aa4aa vsprintf: add bin... |
1529 |
save_arg(long long); |
fef20d9c1 vsprintf: unify t... |
1530 1531 1532 |
break; case FORMAT_TYPE_ULONG: case FORMAT_TYPE_LONG: |
4370aa4aa vsprintf: add bin... |
1533 |
save_arg(unsigned long); |
fef20d9c1 vsprintf: unify t... |
1534 1535 |
break; case FORMAT_TYPE_SIZE_T: |
4370aa4aa vsprintf: add bin... |
1536 |
save_arg(size_t); |
fef20d9c1 vsprintf: unify t... |
1537 1538 |
break; case FORMAT_TYPE_PTRDIFF: |
4370aa4aa vsprintf: add bin... |
1539 |
save_arg(ptrdiff_t); |
fef20d9c1 vsprintf: unify t... |
1540 |
break; |
a4e94ef0d printk: add suppo... |
1541 1542 1543 1544 |
case FORMAT_TYPE_UBYTE: case FORMAT_TYPE_BYTE: save_arg(char); break; |
fef20d9c1 vsprintf: unify t... |
1545 1546 |
case FORMAT_TYPE_USHORT: case FORMAT_TYPE_SHORT: |
4370aa4aa vsprintf: add bin... |
1547 |
save_arg(short); |
fef20d9c1 vsprintf: unify t... |
1548 1549 |
break; default: |
4370aa4aa vsprintf: add bin... |
1550 |
save_arg(int); |
fef20d9c1 vsprintf: unify t... |
1551 |
} |
4370aa4aa vsprintf: add bin... |
1552 1553 |
} } |
fef20d9c1 vsprintf: unify t... |
1554 |
|
7b9186f5e vsprintf: give it... |
1555 |
return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf; |
fef20d9c1 vsprintf: unify t... |
1556 |
#undef save_arg |
4370aa4aa vsprintf: add bin... |
1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 |
} EXPORT_SYMBOL_GPL(vbin_printf); /** * bstr_printf - Format a string from binary arguments and place it in a buffer * @buf: The buffer to place the result into * @size: The size of the buffer, including the trailing null space * @fmt: The format string to use * @bin_buf: Binary arguments for the format string * * This function like C99 vsnprintf, but the difference is that vsnprintf gets * arguments from stack, and bstr_printf gets arguments from @bin_buf which is * a binary buffer that generated by vbin_printf. * * The format follows C99 vsnprintf, but has some extensions: |
0efb4d207 vsnprintf: remove... |
1572 |
* see vsnprintf comment for details. |
4370aa4aa vsprintf: add bin... |
1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 |
* * The return value is the number of characters which would * be generated for the given input, excluding the trailing * '\0', as per ISO C99. If you want to have the exact * number of characters written into @buf as return value * (not including the trailing '\0'), use vscnprintf(). If the * return is greater than or equal to @size, the resulting * string is truncated. */ int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf) { |
fef20d9c1 vsprintf: unify t... |
1584 |
struct printf_spec spec = {0}; |
d4be151b2 vsprintf: move lo... |
1585 1586 |
char *str, *end; const char *args = (const char *)bin_buf; |
4370aa4aa vsprintf: add bin... |
1587 |
|
2f30b1f9e vsprintf: use WAR... |
1588 |
if (WARN_ON_ONCE((int) size < 0)) |
4370aa4aa vsprintf: add bin... |
1589 |
return 0; |
4370aa4aa vsprintf: add bin... |
1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 |
str = buf; end = buf + size; #define get_arg(type) \ ({ \ typeof(type) value; \ if (sizeof(type) == 8) { \ args = PTR_ALIGN(args, sizeof(u32)); \ *(u32 *)&value = *(u32 *)args; \ *((u32 *)&value + 1) = *(u32 *)(args + 4); \ } else { \ args = PTR_ALIGN(args, sizeof(type)); \ value = *(typeof(type) *)args; \ } \ args += sizeof(type); \ value; \ }) /* Make sure end is always >= buf */ if (end < buf) { end = ((void *)-1); size = end - buf; } |
fef20d9c1 vsprintf: unify t... |
1614 |
while (*fmt) { |
fef20d9c1 vsprintf: unify t... |
1615 |
const char *old_fmt = fmt; |
d4be151b2 vsprintf: move lo... |
1616 |
int read = format_decode(fmt, &spec); |
4370aa4aa vsprintf: add bin... |
1617 |
|
fef20d9c1 vsprintf: unify t... |
1618 |
fmt += read; |
4370aa4aa vsprintf: add bin... |
1619 |
|
fef20d9c1 vsprintf: unify t... |
1620 1621 1622 1623 1624 1625 1626 |
switch (spec.type) { case FORMAT_TYPE_NONE: { int copy = read; if (str < end) { if (copy > end - str) copy = end - str; memcpy(str, old_fmt, copy); |
4370aa4aa vsprintf: add bin... |
1627 |
} |
fef20d9c1 vsprintf: unify t... |
1628 1629 |
str += read; break; |
4370aa4aa vsprintf: add bin... |
1630 |
} |
ed681a91a vsprintf: unify t... |
1631 |
case FORMAT_TYPE_WIDTH: |
fef20d9c1 vsprintf: unify t... |
1632 1633 |
spec.field_width = get_arg(int); break; |
4370aa4aa vsprintf: add bin... |
1634 |
|
fef20d9c1 vsprintf: unify t... |
1635 1636 1637 |
case FORMAT_TYPE_PRECISION: spec.precision = get_arg(int); break; |
4370aa4aa vsprintf: add bin... |
1638 |
|
d4be151b2 vsprintf: move lo... |
1639 1640 |
case FORMAT_TYPE_CHAR: { char c; |
fef20d9c1 vsprintf: unify t... |
1641 1642 |
if (!(spec.flags & LEFT)) { while (--spec.field_width > 0) { |
4370aa4aa vsprintf: add bin... |
1643 1644 1645 1646 1647 1648 1649 1650 1651 |
if (str < end) *str = ' '; ++str; } } c = (unsigned char) get_arg(char); if (str < end) *str = c; ++str; |
fef20d9c1 vsprintf: unify t... |
1652 |
while (--spec.field_width > 0) { |
4370aa4aa vsprintf: add bin... |
1653 1654 1655 1656 |
if (str < end) *str = ' '; ++str; } |
fef20d9c1 vsprintf: unify t... |
1657 |
break; |
d4be151b2 vsprintf: move lo... |
1658 |
} |
4370aa4aa vsprintf: add bin... |
1659 |
|
fef20d9c1 vsprintf: unify t... |
1660 |
case FORMAT_TYPE_STR: { |
4370aa4aa vsprintf: add bin... |
1661 |
const char *str_arg = args; |
d4be151b2 vsprintf: move lo... |
1662 |
args += strlen(str_arg) + 1; |
fef20d9c1 vsprintf: unify t... |
1663 1664 |
str = string(str, end, (char *)str_arg, spec); break; |
4370aa4aa vsprintf: add bin... |
1665 |
} |
fef20d9c1 vsprintf: unify t... |
1666 1667 1668 |
case FORMAT_TYPE_PTR: str = pointer(fmt+1, str, end, get_arg(void *), spec); while (isalnum(*fmt)) |
4370aa4aa vsprintf: add bin... |
1669 |
fmt++; |
fef20d9c1 vsprintf: unify t... |
1670 |
break; |
4370aa4aa vsprintf: add bin... |
1671 |
|
fef20d9c1 vsprintf: unify t... |
1672 |
case FORMAT_TYPE_PERCENT_CHAR: |
fef20d9c1 vsprintf: unify t... |
1673 |
case FORMAT_TYPE_INVALID: |
4370aa4aa vsprintf: add bin... |
1674 1675 1676 |
if (str < end) *str = '%'; ++str; |
fef20d9c1 vsprintf: unify t... |
1677 1678 1679 1680 1681 |
break; case FORMAT_TYPE_NRCHARS: /* skip */ break; |
d4be151b2 vsprintf: move lo... |
1682 1683 |
default: { unsigned long long num; |
fef20d9c1 vsprintf: unify t... |
1684 1685 1686 1687 1688 1689 |
switch (spec.type) { case FORMAT_TYPE_LONG_LONG: num = get_arg(long long); break; case FORMAT_TYPE_ULONG: |
fef20d9c1 vsprintf: unify t... |
1690 1691 1692 1693 1694 1695 1696 1697 1698 |
case FORMAT_TYPE_LONG: num = get_arg(unsigned long); break; case FORMAT_TYPE_SIZE_T: num = get_arg(size_t); break; case FORMAT_TYPE_PTRDIFF: num = get_arg(ptrdiff_t); break; |
a4e94ef0d printk: add suppo... |
1699 1700 1701 1702 1703 1704 |
case FORMAT_TYPE_UBYTE: num = get_arg(unsigned char); break; case FORMAT_TYPE_BYTE: num = get_arg(signed char); break; |
fef20d9c1 vsprintf: unify t... |
1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 |
case FORMAT_TYPE_USHORT: num = get_arg(unsigned short); break; case FORMAT_TYPE_SHORT: num = get_arg(short); break; case FORMAT_TYPE_UINT: num = get_arg(unsigned int); break; default: num = get_arg(int); } str = number(str, end, num, spec); |
d4be151b2 vsprintf: move lo... |
1719 1720 1721 |
} /* default: */ } /* switch(spec.type) */ } /* while(*fmt) */ |
fef20d9c1 vsprintf: unify t... |
1722 |
|
4370aa4aa vsprintf: add bin... |
1723 1724 1725 1726 1727 1728 |
if (size > 0) { if (str < end) *str = '\0'; else end[-1] = '\0'; } |
fef20d9c1 vsprintf: unify t... |
1729 |
|
4370aa4aa vsprintf: add bin... |
1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 |
#undef get_arg /* the trailing null byte doesn't count towards the total */ return str - buf; } EXPORT_SYMBOL_GPL(bstr_printf); /** * bprintf - Parse a format string and place args' binary value in a buffer * @bin_buf: The buffer to place args' binary value * @size: The size of the buffer(by words(32bits), not characters) * @fmt: The format string to use * @...: Arguments for the format string * * The function returns the number of words(u32) written * into @bin_buf. */ int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...) { va_list args; int ret; va_start(args, fmt); ret = vbin_printf(bin_buf, size, fmt, args); va_end(args); |
7b9186f5e vsprintf: give it... |
1755 |
|
4370aa4aa vsprintf: add bin... |
1756 1757 1758 1759 1760 |
return ret; } EXPORT_SYMBOL_GPL(bprintf); #endif /* CONFIG_BINARY_PRINTF */ |
1da177e4c Linux-2.6.12-rc2 |
1761 1762 1763 1764 1765 1766 |
/** * vsscanf - Unformat a buffer into a list of arguments * @buf: input buffer * @fmt: format of buffer * @args: arguments */ |
7b9186f5e vsprintf: give it... |
1767 |
int vsscanf(const char *buf, const char *fmt, va_list args) |
1da177e4c Linux-2.6.12-rc2 |
1768 1769 1770 1771 1772 |
{ const char *str = buf; char *next; char digit; int num = 0; |
ef0658f3d vsprintf.c: Reduc... |
1773 1774 1775 |
u8 qualifier; u8 base; s16 field_width; |
d4be151b2 vsprintf: move lo... |
1776 |
bool is_sign; |
1da177e4c Linux-2.6.12-rc2 |
1777 |
|
7b9186f5e vsprintf: give it... |
1778 |
while (*fmt && *str) { |
1da177e4c Linux-2.6.12-rc2 |
1779 1780 1781 1782 1783 |
/* skip any white space in format */ /* white space in format matchs any amount of * white space, including none, in the input. */ if (isspace(*fmt)) { |
e7d2860b6 tree-wide: conver... |
1784 1785 |
fmt = skip_spaces(++fmt); str = skip_spaces(str); |
1da177e4c Linux-2.6.12-rc2 |
1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 |
} /* anything that is not a conversion must match exactly */ if (*fmt != '%' && *fmt) { if (*fmt++ != *str++) break; continue; } if (!*fmt) break; ++fmt; |
7b9186f5e vsprintf: give it... |
1798 |
|
1da177e4c Linux-2.6.12-rc2 |
1799 1800 1801 1802 |
/* skip this conversion. * advance both strings to next white space */ if (*fmt == '*') { |
8fccae2c9 sscanf(): fix %*s%n |
1803 |
while (!isspace(*fmt) && *fmt != '%' && *fmt) |
1da177e4c Linux-2.6.12-rc2 |
1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 |
fmt++; while (!isspace(*str) && *str) str++; continue; } /* get field width */ field_width = -1; if (isdigit(*fmt)) field_width = skip_atoi(&fmt); /* get conversion qualifier */ qualifier = -1; |
75fb8f269 lib: make _tolowe... |
1817 1818 |
if (*fmt == 'h' || _tolower(*fmt) == 'l' || _tolower(*fmt) == 'z') { |
1da177e4c Linux-2.6.12-rc2 |
1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 |
qualifier = *fmt++; if (unlikely(qualifier == *fmt)) { if (qualifier == 'h') { qualifier = 'H'; fmt++; } else if (qualifier == 'l') { qualifier = 'L'; fmt++; } } } |
1da177e4c Linux-2.6.12-rc2 |
1830 1831 1832 |
if (!*fmt || !*str) break; |
d4be151b2 vsprintf: move lo... |
1833 1834 |
base = 10; is_sign = 0; |
7b9186f5e vsprintf: give it... |
1835 |
switch (*fmt++) { |
1da177e4c Linux-2.6.12-rc2 |
1836 1837 |
case 'c': { |
7b9186f5e vsprintf: give it... |
1838 |
char *s = (char *)va_arg(args, char*); |
1da177e4c Linux-2.6.12-rc2 |
1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 |
if (field_width == -1) field_width = 1; do { *s++ = *str++; } while (--field_width > 0 && *str); num++; } continue; case 's': { |
7b9186f5e vsprintf: give it... |
1849 1850 |
char *s = (char *)va_arg(args, char *); if (field_width == -1) |
4be929be3 kernel-wide: repl... |
1851 |
field_width = SHRT_MAX; |
1da177e4c Linux-2.6.12-rc2 |
1852 |
/* first, skip leading white space in buffer */ |
e7d2860b6 tree-wide: conver... |
1853 |
str = skip_spaces(str); |
1da177e4c Linux-2.6.12-rc2 |
1854 1855 |
/* now copy until next white space */ |
7b9186f5e vsprintf: give it... |
1856 |
while (*str && !isspace(*str) && field_width--) |
1da177e4c Linux-2.6.12-rc2 |
1857 |
*s++ = *str++; |
1da177e4c Linux-2.6.12-rc2 |
1858 1859 1860 1861 1862 1863 1864 |
*s = '\0'; num++; } continue; case 'n': /* return number of characters read so far */ { |
7b9186f5e vsprintf: give it... |
1865 |
int *i = (int *)va_arg(args, int*); |
1da177e4c Linux-2.6.12-rc2 |
1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 |
*i = str - buf; } continue; case 'o': base = 8; break; case 'x': case 'X': base = 16; break; case 'i': |
7b9186f5e vsprintf: give it... |
1877 |
base = 0; |
1da177e4c Linux-2.6.12-rc2 |
1878 1879 1880 1881 1882 1883 |
case 'd': is_sign = 1; case 'u': break; case '%': /* looking for '%' in str */ |
7b9186f5e vsprintf: give it... |
1884 |
if (*str++ != '%') |
1da177e4c Linux-2.6.12-rc2 |
1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 |
return num; continue; default: /* invalid format; stop here */ return num; } /* have some sort of integer conversion. * first, skip white space in buffer. */ |
e7d2860b6 tree-wide: conver... |
1895 |
str = skip_spaces(str); |
1da177e4c Linux-2.6.12-rc2 |
1896 1897 1898 1899 1900 1901 |
digit = *str; if (is_sign && digit == '-') digit = *(str + 1); if (!digit |
7b9186f5e vsprintf: give it... |
1902 1903 1904 1905 1906 |
|| (base == 16 && !isxdigit(digit)) || (base == 10 && !isdigit(digit)) || (base == 8 && (!isdigit(digit) || digit > '7')) || (base == 0 && !isdigit(digit))) break; |
1da177e4c Linux-2.6.12-rc2 |
1907 |
|
7b9186f5e vsprintf: give it... |
1908 |
switch (qualifier) { |
1da177e4c Linux-2.6.12-rc2 |
1909 1910 |
case 'H': /* that's 'hh' in format */ if (is_sign) { |
7b9186f5e vsprintf: give it... |
1911 1912 |
signed char *s = (signed char *)va_arg(args, signed char *); *s = (signed char)simple_strtol(str, &next, base); |
1da177e4c Linux-2.6.12-rc2 |
1913 |
} else { |
7b9186f5e vsprintf: give it... |
1914 1915 |
unsigned char *s = (unsigned char *)va_arg(args, unsigned char *); *s = (unsigned char)simple_strtoul(str, &next, base); |
1da177e4c Linux-2.6.12-rc2 |
1916 1917 1918 1919 |
} break; case 'h': if (is_sign) { |
7b9186f5e vsprintf: give it... |
1920 1921 |
short *s = (short *)va_arg(args, short *); *s = (short)simple_strtol(str, &next, base); |
1da177e4c Linux-2.6.12-rc2 |
1922 |
} else { |
7b9186f5e vsprintf: give it... |
1923 1924 |
unsigned short *s = (unsigned short *)va_arg(args, unsigned short *); *s = (unsigned short)simple_strtoul(str, &next, base); |
1da177e4c Linux-2.6.12-rc2 |
1925 1926 1927 1928 |
} break; case 'l': if (is_sign) { |
7b9186f5e vsprintf: give it... |
1929 1930 |
long *l = (long *)va_arg(args, long *); *l = simple_strtol(str, &next, base); |
1da177e4c Linux-2.6.12-rc2 |
1931 |
} else { |
7b9186f5e vsprintf: give it... |
1932 1933 |
unsigned long *l = (unsigned long *)va_arg(args, unsigned long *); *l = simple_strtoul(str, &next, base); |
1da177e4c Linux-2.6.12-rc2 |
1934 1935 1936 1937 |
} break; case 'L': if (is_sign) { |
7b9186f5e vsprintf: give it... |
1938 1939 |
long long *l = (long long *)va_arg(args, long long *); *l = simple_strtoll(str, &next, base); |
1da177e4c Linux-2.6.12-rc2 |
1940 |
} else { |
7b9186f5e vsprintf: give it... |
1941 1942 |
unsigned long long *l = (unsigned long long *)va_arg(args, unsigned long long *); *l = simple_strtoull(str, &next, base); |
1da177e4c Linux-2.6.12-rc2 |
1943 1944 1945 1946 1947 |
} break; case 'Z': case 'z': { |
7b9186f5e vsprintf: give it... |
1948 1949 |
size_t *s = (size_t *)va_arg(args, size_t *); *s = (size_t)simple_strtoul(str, &next, base); |
1da177e4c Linux-2.6.12-rc2 |
1950 1951 1952 1953 |
} break; default: if (is_sign) { |
7b9186f5e vsprintf: give it... |
1954 1955 |
int *i = (int *)va_arg(args, int *); *i = (int)simple_strtol(str, &next, base); |
1da177e4c Linux-2.6.12-rc2 |
1956 |
} else { |
7b9186f5e vsprintf: give it... |
1957 1958 |
unsigned int *i = (unsigned int *)va_arg(args, unsigned int*); *i = (unsigned int)simple_strtoul(str, &next, base); |
1da177e4c Linux-2.6.12-rc2 |
1959 1960 1961 1962 1963 1964 1965 1966 1967 |
} break; } num++; if (!next) break; str = next; } |
c6b40d16d fix sscanf %n mat... |
1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 |
/* * Now we've come all the way through so either the input string or the * format ended. In the former case, there can be a %n at the current * position in the format that needs to be filled. */ if (*fmt == '%' && *(fmt + 1) == 'n') { int *p = (int *)va_arg(args, int *); *p = str - buf; } |
1da177e4c Linux-2.6.12-rc2 |
1978 1979 |
return num; } |
1da177e4c Linux-2.6.12-rc2 |
1980 1981 1982 1983 1984 1985 1986 1987 |
EXPORT_SYMBOL(vsscanf); /** * sscanf - Unformat a buffer into a list of arguments * @buf: input buffer * @fmt: formatting of buffer * @...: resulting arguments */ |
7b9186f5e vsprintf: give it... |
1988 |
int sscanf(const char *buf, const char *fmt, ...) |
1da177e4c Linux-2.6.12-rc2 |
1989 1990 1991 |
{ va_list args; int i; |
7b9186f5e vsprintf: give it... |
1992 1993 |
va_start(args, fmt); i = vsscanf(buf, fmt, args); |
1da177e4c Linux-2.6.12-rc2 |
1994 |
va_end(args); |
7b9186f5e vsprintf: give it... |
1995 |
|
1da177e4c Linux-2.6.12-rc2 |
1996 1997 |
return i; } |
1da177e4c Linux-2.6.12-rc2 |
1998 |
EXPORT_SYMBOL(sscanf); |