diff --git a/drivers/ddk/Makefile b/drivers/ddk/Makefile index fcff015985..5416a061ec 100644 --- a/drivers/ddk/Makefile +++ b/drivers/ddk/Makefile @@ -1,4 +1,5 @@ + CC = gcc AS = as @@ -24,11 +25,9 @@ NAME_SRCS:= \ linux/firmware.c \ linux/list_sort.c \ linux/dmapool.c \ + linux/ctype.c \ malloc/malloc.c \ - stdio/icompute.c \ stdio/vsprintf.c \ - stdio/doprnt.c \ - stdio/chartab.c \ string/_memmove.S \ string/_strncat.S \ string/_strncmp.S \ diff --git a/drivers/ddk/debug/dbglog.c b/drivers/ddk/debug/dbglog.c index 9bbe6dc6b9..736b77659c 100644 --- a/drivers/ddk/debug/dbglog.c +++ b/drivers/ddk/debug/dbglog.c @@ -174,17 +174,5 @@ int xf86DrvMsg(int skip, int code, const char* format, ...) return len; } -int snprintf(char *s, size_t n, const char *format, ...) -{ - va_list ap; - int retval; - - va_start(ap, format); - retval = vsnprintf(s, n, format, ap); - va_end(ap); - - return retval; -} - diff --git a/drivers/ddk/stdio/chartab.c b/drivers/ddk/stdio/chartab.c deleted file mode 100644 index 8f7dac220c..0000000000 --- a/drivers/ddk/stdio/chartab.c +++ /dev/null @@ -1,261 +0,0 @@ -#include "ctype.h" - -char __ctype[] = { -0, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_C|_S, -_C|_S, -_C|_S, -_C|_S, -_C|_S, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_C, -_S, -_P, -_P, -_P, -_P, -_P, -_P, -_P, -_P, -_P, -_P, -_P, -_P, -_P, -_P, -_P, -_N, -_N, -_N, -_N, -_N, -_N, -_N, -_N, -_N, -_N, -_P, -_P, -_P, -_P, -_P, -_P, -_P, -_U|_X, -_U|_X, -_U|_X, -_U|_X, -_U|_X, -_U|_X, -_U, -_U, -_U, -_U, -_U, -_U, -_U, -_U, -_U, -_U, -_U, -_U, -_U, -_U, -_U, -_U, -_U, -_U, -_U, -_U, -_P, -_P, -_P, -_P, -_P, -_P, -_L|_X, -_L|_X, -_L|_X, -_L|_X, -_L|_X, -_L|_X, -_L, -_L, -_L, -_L, -_L, -_L, -_L, -_L, -_L, -_L, -_L, -_L, -_L, -_L, -_L, -_L, -_L, -_L, -_L, -_L, -_P, -_P, -_P, -_P, -_C, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -0, -}; diff --git a/drivers/ddk/stdio/ctype.h b/drivers/ddk/stdio/ctype.h deleted file mode 100644 index 28e794bc02..0000000000 --- a/drivers/ddk/stdio/ctype.h +++ /dev/null @@ -1,44 +0,0 @@ -/* The header file defines some macros used to identify characters. - * It works by using a table stored in chartab.c. When a character is presented - * to one of these macros, the character is used as an index into the table - * (__ctype) to retrieve a byte. The relevant bit is then extracted. - */ - -#ifndef _CTYPE_H -#define _CTYPE_H - - -extern char __ctype[]; /* property array defined in chartab.c */ - -#define _U 0x01 /* this bit is for upper-case letters [A-Z] */ -#define _L 0x02 /* this bit is for lower-case letters [a-z] */ -#define _N 0x04 /* this bit is for numbers [0-9] */ -#define _S 0x08 /* this bit is for white space \t \n \f etc */ -#define _P 0x10 /* this bit is for punctuation characters */ -#define _C 0x20 /* this bit is for control characters */ -#define _X 0x40 /* this bit is for hex digits [a-f] and [A-F]*/ - - -/* Macros for identifying character classes. */ -#define isalnum(c) ((__ctype+1)[c]&(_U|_L|_N)) -#define isalpha(c) ((__ctype+1)[c]&(_U|_L)) -#define iscntrl(c) ((__ctype+1)[c]&_C) -#define isgraph(c) ((__ctype+1)[c]&(_P|_U|_L|_N)) -#define ispunct(c) ((__ctype+1)[c]&_P) -#define isspace(c) ((__ctype+1)[c]&_S) -#define isxdigit(c) ((__ctype+1)[c]&(_N|_X)) - -#define isdigit(c) ((unsigned) ((c)-'0') < 10) -#define islower(c) ((unsigned) ((c)-'a') < 26) -#define isupper(c) ((unsigned) ((c)-'A') < 26) -#define isprint(c) ((unsigned) ((c)-' ') < 95) -#define isascii(c) ((unsigned) (c) < 128) - -#define toascii(c) ((c) & 0x7f) - -static inline int toupper(int c) -{ - return islower(c) ? c - 'a' + 'A' : c ; -} - -#endif /* _CTYPE_H */ diff --git a/drivers/ddk/stdio/doprnt.c b/drivers/ddk/stdio/doprnt.c deleted file mode 100644 index b963431a31..0000000000 --- a/drivers/ddk/stdio/doprnt.c +++ /dev/null @@ -1,311 +0,0 @@ -/* - * doprnt.c - print formatted output - */ -/* $Header$ */ - -#include "ctype.h" -#include "stdio.h" -#include -#include -#include "loc_incl.h" - -#define NOFLOAT - -#define putc(c, p) (--(p)->_count >= 0 ? \ - (int) (*(p)->_ptr++ = (c)) : EOF) - -/* gnum() is used to get the width and precision fields of a format. */ -static const char * -gnum(register const char *f, int *ip, va_list *app) -{ - register int i, c; - - if (*f == '*') { - *ip = va_arg((*app), int); - f++; - } else { - i = 0; - while ((c = *f - '0') >= 0 && c <= 9) { - i = i*10 + c; - f++; - } - *ip = i; - } - return f; -} - -#if _EM_WSIZE == _EM_PSIZE -#define set_pointer(flags) /* nothing */ -#elif _EM_LSIZE == _EM_PSIZE -#define set_pointer(flags) (flags |= FL_LONG) -#else -#error garbage pointer size -#define set_pointer(flags) /* compilation might continue */ -#endif - -/* print an ordinal number */ -static char * -o_print(va_list *ap, int flags, char *s, char c, int precision, int is_signed) -{ - long signed_val; - unsigned long unsigned_val; - char *old_s = s; - int base; - - switch (flags & (FL_SHORT | FL_LONG)) { - case FL_SHORT: - if (is_signed) { - signed_val = (short) va_arg(*ap, int); - } else { - unsigned_val = (unsigned short) va_arg(*ap, unsigned); - } - break; - case FL_LONG: - if (is_signed) { - signed_val = va_arg(*ap, long); - } else { - unsigned_val = va_arg(*ap, unsigned long); - } - break; - default: - if (is_signed) { - signed_val = va_arg(*ap, int); - } else { - unsigned_val = va_arg(*ap, unsigned int); - } - break; - } - - if (is_signed) { - if (signed_val < 0) { - *s++ = '-'; - signed_val = -signed_val; - } else if (flags & FL_SIGN) *s++ = '+'; - else if (flags & FL_SPACE) *s++ = ' '; - unsigned_val = signed_val; - } - if ((flags & FL_ALT) && (c == 'o')) *s++ = '0'; - if (!unsigned_val && c != 'p') { - if (!precision) - return s; - } else if (((flags & FL_ALT) && (c == 'x' || c == 'X')) - || c == 'p') { - *s++ = '0'; - *s++ = (c == 'X' ? 'X' : 'x'); - } - - switch (c) { - case 'b': base = 2; break; - case 'o': base = 8; break; - case 'd': - case 'i': - case 'u': base = 10; break; - case 'x': - case 'X': - case 'p': base = 16; break; - } - - s = _i_compute(unsigned_val, base, s, precision); - - if (c == 'X') - while (old_s != s) { - *old_s = toupper(*old_s); - old_s++; - } - - return s; -} - -int -_doprnt(register const char *fmt, va_list ap, FILE *stream) -{ - register char *s; - register int j; - int i, c, width, precision, zfill, flags, between_fill; - int nrchars=0; - const char *oldfmt; - char *s1, buf[1025]; - - while (c = *fmt++) { - if (c != '%') { - if (c == '\n') { - if (putc('\r', stream) == EOF) - return nrchars ? -nrchars : -1; - nrchars++; - } - if (putc(c, stream) == EOF) - return nrchars ? -nrchars : -1; - nrchars++; - continue; - } - flags = 0; - do { - switch(*fmt) { - case '-': flags |= FL_LJUST; break; - case '+': flags |= FL_SIGN; break; - case ' ': flags |= FL_SPACE; break; - case '#': flags |= FL_ALT; break; - case '0': flags |= FL_ZEROFILL; break; - default: flags |= FL_NOMORE; continue; - } - fmt++; - } while(!(flags & FL_NOMORE)); - - oldfmt = fmt; - fmt = gnum(fmt, &width, &ap); - if (fmt != oldfmt) flags |= FL_WIDTHSPEC; - - if (*fmt == '.') { - fmt++; oldfmt = fmt; - fmt = gnum(fmt, &precision, &ap); - if (precision >= 0) flags |= FL_PRECSPEC; - } - - if ((flags & FL_WIDTHSPEC) && width < 0) { - width = -width; - flags |= FL_LJUST; - } - if (!(flags & FL_WIDTHSPEC)) width = 0; - - if (flags & FL_SIGN) flags &= ~FL_SPACE; - - if (flags & FL_LJUST) flags &= ~FL_ZEROFILL; - - - s = s1 = buf; - - switch (*fmt) { - case 'h': flags |= FL_SHORT; fmt++; break; - case 'l': flags |= FL_LONG; fmt++; break; - case 'L': flags |= FL_LONGDOUBLE; fmt++; break; - } - - switch (c = *fmt++) { - default: - if (c == '\n') { - if (putc('\r', stream) == EOF) - return nrchars ? -nrchars : -1; - nrchars++; - } - if (putc(c, stream) == EOF) - return nrchars ? -nrchars : -1; - nrchars++; - continue; - case 'n': - if (flags & FL_SHORT) - *va_arg(ap, short *) = (short) nrchars; - else if (flags & FL_LONG) - *va_arg(ap, long *) = (long) nrchars; - else - *va_arg(ap, int *) = (int) nrchars; - continue; - case 's': - s1 = va_arg(ap, char *); - if (s1 == NULL) - s1 = "(null)"; - s = s1; - while (precision || !(flags & FL_PRECSPEC)) { - if (*s == '\0') - break; - s++; - precision--; - } - break; - case 'p': - set_pointer(flags); - /* fallthrough */ - case 'b': - case 'o': - case 'u': - case 'x': - case 'X': - if (!(flags & FL_PRECSPEC)) precision = 1; - else if (c != 'p') flags &= ~FL_ZEROFILL; - s = o_print(&ap, flags, s, c, precision, 0); - break; - case 'd': - case 'i': - flags |= FL_SIGNEDCONV; - if (!(flags & FL_PRECSPEC)) precision = 1; - else flags &= ~FL_ZEROFILL; - s = o_print(&ap, flags, s, c, precision, 1); - break; - case 'c': - *s++ = va_arg(ap, int); - break; -#ifndef NOFLOAT - case 'G': - case 'g': - if ((flags & FL_PRECSPEC) && (precision == 0)) - precision = 1; - case 'f': - case 'E': - case 'e': - if (!(flags & FL_PRECSPEC)) - precision = 6; - - if (precision >= sizeof(buf)) - precision = sizeof(buf) - 1; - - flags |= FL_SIGNEDCONV; - s = _f_print(&ap, flags, s, c, precision); - break; -#endif /* NOFLOAT */ - case 'r': - ap = va_arg(ap, va_list); - fmt = va_arg(ap, char *); - continue; - } - zfill = ' '; - if (flags & FL_ZEROFILL) zfill = '0'; - j = s - s1; - - /* between_fill is true under the following conditions: - * 1- the fill character is '0' - * and - * 2a- the number is of the form 0x... or 0X... - * or - * 2b- the number contains a sign or space - */ - between_fill = 0; - if ((flags & FL_ZEROFILL) - && (((c == 'x' || c == 'X') && (flags & FL_ALT) && j > 1) - || (c == 'p') - || ((flags & FL_SIGNEDCONV) - && ( *s1 == '+' || *s1 == '-' || *s1 == ' ')))) - between_fill++; - - if ((i = width - j) > 0) - if (!(flags & FL_LJUST)) { /* right justify */ - nrchars += i; - if (between_fill) { - if (flags & FL_SIGNEDCONV) { - j--; nrchars++; - if (putc(*s1++, stream) == EOF) - return nrchars ? -nrchars : -1; - } else { - j -= 2; nrchars += 2; - if ((putc(*s1++, stream) == EOF) - || (putc(*s1++, stream) == EOF)) - return nrchars ? -nrchars : -1; - } - } - do { - if (putc(zfill, stream) == EOF) - return nrchars ? -nrchars : -1; - } while (--i); - } - - nrchars += j; - while (--j >= 0) { - if (putc(*s1++, stream) == EOF) - return nrchars ? -nrchars : -1; - } - - if (i > 0) nrchars += i; - while (--i >= 0) - if (putc(zfill, stream) == EOF) - return nrchars ? -nrchars : -1; - } - return nrchars; -} diff --git a/drivers/ddk/stdio/icompute.c b/drivers/ddk/stdio/icompute.c deleted file mode 100644 index 5e7fa80f6c..0000000000 --- a/drivers/ddk/stdio/icompute.c +++ /dev/null @@ -1,21 +0,0 @@ -/* - * icompute.c - compute an integer - */ -/* $Header$ */ - -#include "loc_incl.h" - -/* This routine is used in doprnt.c as well as in tmpfile.c and tmpnam.c. */ - -char * -_i_compute(unsigned long val, int base, char *s, int nrdigits) -{ - int c; - - c= val % base ; - val /= base ; - if (val || nrdigits > 1) - s = _i_compute(val, base, s, nrdigits - 1); - *s++ = (c>9 ? c-10+'a' : c+'0'); - return s; -} diff --git a/drivers/ddk/stdio/loc_incl.h b/drivers/ddk/stdio/loc_incl.h deleted file mode 100644 index 384e910c8c..0000000000 --- a/drivers/ddk/stdio/loc_incl.h +++ /dev/null @@ -1,37 +0,0 @@ -/* - * loc_incl.h - local include file for stdio library - */ -/* $Header$ */ - -#include "stdio.h" - -#define io_testflag(p,x) ((p)->_flags & (x)) - -#include - -#ifdef _ANSI -int _doprnt(const char *format, va_list ap, FILE *stream); -int _doscan(FILE * stream, const char *format, va_list ap); -char *_i_compute(unsigned long val, int base, char *s, int nrdigits); -char *_f_print(va_list *ap, int flags, char *s, char c, int precision); -void __cleanup(void); - -#ifndef NOFLOAT -char *_ecvt(long double value, int ndigit, int *decpt, int *sign); -char *_fcvt(long double value, int ndigit, int *decpt, int *sign); -#endif /* NOFLOAT */ -#endif - -#define FL_LJUST 0x0001 /* left-justify field */ -#define FL_SIGN 0x0002 /* sign in signed conversions */ -#define FL_SPACE 0x0004 /* space in signed conversions */ -#define FL_ALT 0x0008 /* alternate form */ -#define FL_ZEROFILL 0x0010 /* fill with zero's */ -#define FL_SHORT 0x0020 /* optional h */ -#define FL_LONG 0x0040 /* optional l */ -#define FL_LONGDOUBLE 0x0080 /* optional L */ -#define FL_WIDTHSPEC 0x0100 /* field width is specified */ -#define FL_PRECSPEC 0x0200 /* precision is specified */ -#define FL_SIGNEDCONV 0x0400 /* may contain a sign */ -#define FL_NOASSIGN 0x0800 /* do not assign (in scanf) */ -#define FL_NOMORE 0x1000 /* all flags collected */ diff --git a/drivers/ddk/stdio/stdio.h b/drivers/ddk/stdio/stdio.h deleted file mode 100644 index c1c9abd7ec..0000000000 --- a/drivers/ddk/stdio/stdio.h +++ /dev/null @@ -1,46 +0,0 @@ -/* - * stdio.h - input/output definitions - * - * (c) copyright 1987 by the Vrije Universiteit, Amsterdam, The Netherlands. - * See the copyright notice in the ACK home directory, in the file "Copyright". - */ -/* $Header$ */ - -#ifndef _STDIO_H -#define _STDIO_H - -/* - * Focus point of all stdio activity. - */ -typedef struct __iobuf { - int _count; - int _fd; - int _flags; - int _bufsiz; - unsigned char *_buf; - unsigned char *_ptr; -} FILE; - -#define _IOFBF 0x000 -#define _IOREAD 0x001 -#define _IOWRITE 0x002 -#define _IONBF 0x004 -#define _IOMYBUF 0x008 -#define _IOEOF 0x010 -#define _IOERR 0x020 -#define _IOLBF 0x040 -#define _IOREADING 0x080 -#define _IOWRITING 0x100 -#define _IOAPPEND 0x200 -#define _IOFIFO 0x400 - -/* The following definitions are also in . They should not - * conflict. - */ -#define SEEK_SET 0 -#define SEEK_CUR 1 -#define SEEK_END 2 - -#define EOF (-1) - -#endif /* _STDIO_H */ diff --git a/drivers/ddk/stdio/vsprintf.c b/drivers/ddk/stdio/vsprintf.c index dfc41787f5..d9cb992d1f 100644 --- a/drivers/ddk/stdio/vsprintf.c +++ b/drivers/ddk/stdio/vsprintf.c @@ -1,37 +1,1353 @@ -/* - * vsprintf - print formatted output without ellipsis on an array - */ -/* $Header$ */ - -#include "stdio.h" -#include -#include -#include "loc_incl.h" - -#define putc(c, p) (--(p)->_count >= 0 ? \ - (int) (*(p)->_ptr++ = (c)) : EOF) - -int -vsnprintf(char *s, unsigned n, const char *format, va_list arg) -{ - int retval; - FILE tmp_stream; - - tmp_stream._fd = -1; - tmp_stream._flags = _IOWRITE + _IONBF + _IOWRITING; - tmp_stream._buf = (unsigned char *) s; - tmp_stream._ptr = (unsigned char *) s; - tmp_stream._count = n-1; - - retval = _doprnt(format, arg, &tmp_stream); - tmp_stream._count = 1; - putc('\0',&tmp_stream); - - return retval; -} - -int -vsprintf(char *s, const char *format, va_list arg) -{ - return vsnprintf(s, INT_MAX, format, arg); -} +/* + * linux/lib/vsprintf.c + * + * Copyright (C) 1991, 1992 Linus Torvalds + */ + +/* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */ +/* + * Wirzenius wrote this portably, Torvalds fucked it up :-) + */ + +/* + * Fri Jul 13 2001 Crutcher Dunnavant + * - changed to provide snprintf and vsnprintf functions + * So Feb 1 16:51:32 CET 2004 Juergen Quade + * - scnprintf and vscnprintf + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +struct va_format { + const char *fmt; + va_list *va; +}; + +#ifndef dereference_function_descriptor +#define dereference_function_descriptor(p) (p) +#endif + +const char hex_asc[] = "0123456789abcdef"; + +/* Works only for digits and letters, but small and fast */ +#define TOLOWER(x) ((x) | 0x20) + +static unsigned int simple_guess_base(const char *cp) +{ + if (cp[0] == '0') { + if (TOLOWER(cp[1]) == 'x' && isxdigit(cp[2])) + return 16; + else + return 8; + } else { + return 10; + } +} + +/** + * simple_strtoull - convert a string to an unsigned 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 + */ +unsigned long long simple_strtoull(const char *cp, char **endp, unsigned int base) +{ + unsigned long long result = 0; + + if (!base) + base = simple_guess_base(cp); + + if (base == 16 && cp[0] == '0' && TOLOWER(cp[1]) == 'x') + cp += 2; + + while (isxdigit(*cp)) { + unsigned int value; + + value = isdigit(*cp) ? *cp - '0' : TOLOWER(*cp) - 'a' + 10; + if (value >= base) + break; + result = result * base + value; + cp++; + } + if (endp) + *endp = (char *)cp; + + return result; +} +EXPORT_SYMBOL(simple_strtoull); + +/** + * simple_strtoul - convert a string to an unsigned 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 + */ +unsigned long simple_strtoul(const char *cp, char **endp, unsigned int base) +{ + return simple_strtoull(cp, endp, base); +} +EXPORT_SYMBOL(simple_strtoul); + +/** + * simple_strtol - convert a string to a signed 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 + */ +long simple_strtol(const char *cp, char **endp, unsigned int base) +{ + if (*cp == '-') + return -simple_strtoul(cp + 1, endp, base); + + return simple_strtoul(cp, endp, base); +} +EXPORT_SYMBOL(simple_strtol); + +/** + * 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 + */ +long long simple_strtoll(const char *cp, char **endp, unsigned int base) +{ + if (*cp == '-') + return -simple_strtoull(cp + 1, endp, base); + + return simple_strtoull(cp, endp, base); +} +EXPORT_SYMBOL(simple_strtoll); + +/** + * strict_strtoul - convert a string to an unsigned long strictly + * @cp: The string to be converted + * @base: The number base to use + * @res: The converted result value + * + * strict_strtoul converts a string to an unsigned long only if the + * string is really an unsigned long string, any string containing + * any invalid char at the tail will be rejected and -EINVAL is returned, + * only a newline char at the tail is acceptible because people generally + * change a module parameter in the following way: + * + * echo 1024 > /sys/module/e1000/parameters/copybreak + * + * echo will append a newline to the tail. + * + * It returns 0 if conversion is successful and *res is set to the converted + * value, otherwise it returns -EINVAL and *res is set to 0. + * + * simple_strtoul just ignores the successive invalid characters and + * return the converted value of prefix part of the string. + */ +int strict_strtoul(const char *cp, unsigned int base, unsigned long *res) +{ + char *tail; + unsigned long val; + + *res = 0; + if (!*cp) + return -EINVAL; + + val = simple_strtoul(cp, &tail, base); + if (tail == cp) + return -EINVAL; + + if ((tail[0] == '\0') || (tail[0] == '\n' && tail[1] == '\0')) { + *res = val; + return 0; + } + + return -EINVAL; +} +EXPORT_SYMBOL(strict_strtoul); + +/** + * strict_strtol - convert a string to a long strictly + * @cp: The string to be converted + * @base: The number base to use + * @res: The converted result value + * + * strict_strtol is similiar to strict_strtoul, but it allows the first + * character of a string is '-'. + * + * It returns 0 if conversion is successful and *res is set to the converted + * value, otherwise it returns -EINVAL and *res is set to 0. + */ +int strict_strtol(const char *cp, unsigned int base, long *res) +{ + int ret; + if (*cp == '-') { + ret = strict_strtoul(cp + 1, base, (unsigned long *)res); + if (!ret) + *res = -(*res); + } else { + ret = strict_strtoul(cp, base, (unsigned long *)res); + } + + return ret; +} +EXPORT_SYMBOL(strict_strtol); + +/** + * strict_strtoull - convert a string to an unsigned long long strictly + * @cp: The string to be converted + * @base: The number base to use + * @res: The converted result value + * + * strict_strtoull converts a string to an unsigned long long only if the + * string is really an unsigned long long string, any string containing + * any invalid char at the tail will be rejected and -EINVAL is returned, + * only a newline char at the tail is acceptible because people generally + * change a module parameter in the following way: + * + * echo 1024 > /sys/module/e1000/parameters/copybreak + * + * echo will append a newline to the tail of the string. + * + * It returns 0 if conversion is successful and *res is set to the converted + * value, otherwise it returns -EINVAL and *res is set to 0. + * + * simple_strtoull just ignores the successive invalid characters and + * return the converted value of prefix part of the string. + */ +int strict_strtoull(const char *cp, unsigned int base, unsigned long long *res) +{ + char *tail; + unsigned long long val; + + *res = 0; + if (!*cp) + return -EINVAL; + + val = simple_strtoull(cp, &tail, base); + if (tail == cp) + return -EINVAL; + if ((tail[0] == '\0') || (tail[0] == '\n' && tail[1] == '\0')) { + *res = val; + return 0; + } + + return -EINVAL; +} +EXPORT_SYMBOL(strict_strtoull); + +/** + * strict_strtoll - convert a string to a long long strictly + * @cp: The string to be converted + * @base: The number base to use + * @res: The converted result value + * + * strict_strtoll is similiar to strict_strtoull, but it allows the first + * character of a string is '-'. + * + * It returns 0 if conversion is successful and *res is set to the converted + * value, otherwise it returns -EINVAL and *res is set to 0. + */ +int strict_strtoll(const char *cp, unsigned int base, long long *res) +{ + int ret; + if (*cp == '-') { + ret = strict_strtoull(cp + 1, base, (unsigned long long *)res); + if (!ret) + *res = -(*res); + } else { + ret = strict_strtoull(cp, base, (unsigned long long *)res); + } + + return ret; +} +EXPORT_SYMBOL(strict_strtoll); + +static noinline_for_stack +int skip_atoi(const char **s) +{ + int i = 0; + + while (isdigit(**s)) + i = i*10 + *((*s)++) - '0'; + + return i; +} + +/* 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. */ +static noinline_for_stack +char *put_dec_trunc(char *buf, unsigned q) +{ + 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) + *buf++ = q + '0'; /* most sign. digit */ + } + } + } + + return buf; +} +/* Same with if's removed. Always emits five digits */ +static noinline_for_stack +char *put_dec_full(char *buf, unsigned q) +{ + /* 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); + + /* + * 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) + */ + 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'; + + return buf; +} +/* No inlining helps gcc to use registers better */ +static noinline_for_stack +char *put_dec(char *buf, unsigned long long num) +{ + while (1) { + unsigned rem; + if (num < 100000) + return put_dec_trunc(buf, num); + rem = do_div(num, 100000); + buf = put_dec_full(buf, rem); + } +} + +#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 */ +#define SMALL 32 /* use lowercase in hex (must be 32 == 0x20) */ +#define SPECIAL 64 /* prefix hex with "0x", octal with "0" */ + +enum format_type { + FORMAT_TYPE_NONE, /* Just a string part */ + FORMAT_TYPE_WIDTH, + 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, + FORMAT_TYPE_UBYTE, + FORMAT_TYPE_BYTE, + 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 { + u8 type; /* format_type enum */ + u8 flags; /* flags to number() */ + 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 */ +}; + +static noinline_for_stack +char *number(char *buf, char *end, unsigned long long num, + struct printf_spec spec) +{ + /* 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; + int need_pfx = ((spec.flags & SPECIAL) && spec.base != 10); + int i; + + /* locase = 0 or 0x20. ORing digits or letters with 'locase' + * produces same digits or (maybe lowercased) letters */ + locase = (spec.flags & SMALL); + if (spec.flags & LEFT) + spec.flags &= ~ZEROPAD; + sign = 0; + if (spec.flags & SIGN) { + if ((signed long long)num < 0) { + sign = '-'; + num = -(signed long long)num; + spec.field_width--; + } else if (spec.flags & PLUS) { + sign = '+'; + spec.field_width--; + } else if (spec.flags & SPACE) { + sign = ' '; + spec.field_width--; + } + } + if (need_pfx) { + spec.field_width--; + if (spec.base == 16) + spec.field_width--; + } + + /* generate full string in tmp[], in reverse order */ + i = 0; + if (num == 0) + tmp[i++] = '0'; + /* Generic code, for any base: + else do { + tmp[i++] = (digits[do_div(num,base)] | locase); + } while (num != 0); + */ + else if (spec.base != 10) { /* 8 or 16 */ + int mask = spec.base - 1; + int shift = 3; + + if (spec.base == 16) + shift = 4; + do { + tmp[i++] = (digits[((unsigned char)num) & mask] | locase); + num >>= shift; + } while (num); + } else { /* base 10 */ + i = put_dec(tmp, num) - tmp; + } + + /* printing 100 using %2d gives "100", not "00" */ + if (i > spec.precision) + spec.precision = i; + /* leading space padding */ + spec.field_width -= spec.precision; + if (!(spec.flags & (ZEROPAD+LEFT))) { + while (--spec.field_width >= 0) { + if (buf < end) + *buf = ' '; + ++buf; + } + } + /* sign */ + if (sign) { + if (buf < end) + *buf = sign; + ++buf; + } + /* "0x" / "0" prefix */ + if (need_pfx) { + if (buf < end) + *buf = '0'; + ++buf; + if (spec.base == 16) { + if (buf < end) + *buf = ('X' | locase); + ++buf; + } + } + /* zero or space padding */ + if (!(spec.flags & LEFT)) { + char c = (spec.flags & ZEROPAD) ? '0' : ' '; + while (--spec.field_width >= 0) { + if (buf < end) + *buf = c; + ++buf; + } + } + /* hmm even more zero padding? */ + while (i <= --spec.precision) { + if (buf < end) + *buf = '0'; + ++buf; + } + /* actual digits of result */ + while (--i >= 0) { + if (buf < end) + *buf = tmp[i]; + ++buf; + } + /* trailing space padding */ + while (--spec.field_width >= 0) { + if (buf < end) + *buf = ' '; + ++buf; + } + + return buf; +} + +static noinline_for_stack +char *string(char *buf, char *end, const char *s, struct printf_spec spec) +{ + int len, i; + + if ((unsigned long)s < PAGE_SIZE) + s = "(null)"; + + len = strnlen(s, spec.precision); + + if (!(spec.flags & LEFT)) { + while (len < spec.field_width--) { + if (buf < end) + *buf = ' '; + ++buf; + } + } + for (i = 0; i < len; ++i) { + if (buf < end) + *buf = *s; + ++buf; ++s; + } + while (len < spec.field_width--) { + if (buf < end) + *buf = ' '; + ++buf; + } + + return buf; +} + +static noinline_for_stack +char *symbol_string(char *buf, char *end, void *ptr, + struct printf_spec spec, char ext) +{ + unsigned long value = (unsigned long) ptr; +#ifdef CONFIG_KALLSYMS + char sym[KSYM_SYMBOL_LEN]; + if (ext != 'f' && ext != 's') + sprint_symbol(sym, value); + else + kallsyms_lookup(value, NULL, NULL, NULL, sym); + + return string(buf, end, sym, spec); +#else + spec.field_width = 2 * sizeof(void *); + spec.flags |= SPECIAL | SMALL | ZEROPAD; + spec.base = 16; + + return number(buf, end, value, spec); +#endif +} + +static noinline_for_stack +char *resource_string(char *buf, char *end, struct resource *res, + struct printf_spec spec, const char *fmt) +{ +#ifndef IO_RSRC_PRINTK_SIZE +#define IO_RSRC_PRINTK_SIZE 6 +#endif + +#ifndef MEM_RSRC_PRINTK_SIZE +#define MEM_RSRC_PRINTK_SIZE 10 +#endif + static const struct printf_spec io_spec = { + .base = 16, + .field_width = IO_RSRC_PRINTK_SIZE, + .precision = -1, + .flags = SPECIAL | SMALL | ZEROPAD, + }; + static const struct printf_spec mem_spec = { + .base = 16, + .field_width = MEM_RSRC_PRINTK_SIZE, + .precision = -1, + .flags = SPECIAL | SMALL | ZEROPAD, + }; + static const struct printf_spec bus_spec = { + .base = 16, + .field_width = 2, + .precision = -1, + .flags = SMALL | ZEROPAD, + }; + static const struct printf_spec dec_spec = { + .base = 10, + .precision = -1, + .flags = 0, + }; + static const struct printf_spec str_spec = { + .field_width = -1, + .precision = 10, + .flags = LEFT, + }; + static const struct printf_spec flag_spec = { + .base = 16, + .precision = -1, + .flags = SPECIAL | SMALL, + }; + + /* 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)) +#define DECODED_BUF_SIZE sizeof("[mem - 64bit pref window disabled]") +#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)]; + + char *p = sym, *pend = sym + sizeof(sym); + int decode = (fmt[0] == 'R') ? 1 : 0; + const struct printf_spec *specp; + + *p++ = '['; + if (res->flags & IORESOURCE_IO) { + p = string(p, pend, "io ", str_spec); + specp = &io_spec; + } else if (res->flags & IORESOURCE_MEM) { + p = string(p, pend, "mem ", str_spec); + specp = &mem_spec; + } else if (res->flags & IORESOURCE_IRQ) { + p = string(p, pend, "irq ", str_spec); + specp = &dec_spec; + } else if (res->flags & IORESOURCE_DMA) { + p = string(p, pend, "dma ", str_spec); + specp = &dec_spec; + } else if (res->flags & IORESOURCE_BUS) { + p = string(p, pend, "bus ", str_spec); + specp = &bus_spec; + } else { + p = string(p, pend, "??? ", str_spec); + specp = &mem_spec; + decode = 0; + } + p = number(p, pend, res->start, *specp); + if (res->start != res->end) { + *p++ = '-'; + p = number(p, pend, res->end, *specp); + } + if (decode) { + 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); + if (res->flags & IORESOURCE_WINDOW) + p = string(p, pend, " window", str_spec); + if (res->flags & IORESOURCE_DISABLED) + p = string(p, pend, " disabled", str_spec); + } else { + p = string(p, pend, " flags ", str_spec); + p = number(p, pend, res->flags, flag_spec); + } + *p++ = ']'; + *p = '\0'; + + return string(buf, end, sym, spec); +} + +static noinline_for_stack +char *mac_address_string(char *buf, char *end, u8 *addr, + struct printf_spec spec, const char *fmt) +{ + char mac_addr[sizeof("xx:xx:xx:xx:xx:xx")]; + char *p = mac_addr; + int i; + char separator; + + if (fmt[1] == 'F') { /* FDDI canonical format */ + separator = '-'; + } else { + separator = ':'; + } + + for (i = 0; i < 6; i++) { + p = pack_hex_byte(p, addr[i]); + if (fmt[0] == 'M' && i != 5) + *p++ = separator; + } + *p = '\0'; + + return string(buf, end, mac_addr, spec); +} + +static noinline_for_stack +char *ip4_string(char *p, const u8 *addr, const char *fmt) +{ + int i; + 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; + } + for (i = 0; i < 4; i++) { + char temp[3]; /* hold each IP quad in reverse order */ + int digits = put_dec_trunc(temp, addr[index]) - temp; + 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++ = '.'; + index += step; + } + *p = '\0'; + + return p; +} + + +static noinline_for_stack +char *ip4_addr_string(char *buf, char *end, const u8 *addr, + struct printf_spec spec, const char *fmt) +{ + char ip4_addr[sizeof("255.255.255.255")]; + + ip4_string(ip4_addr, addr, fmt); + + return string(buf, end, ip4_addr, spec); +} + + +int kptr_restrict = 1; + +/* + * 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. + * + * Right now we handle: + * + * - 'F' For symbolic function descriptor pointers with offset + * - 'f' For simple symbolic function names without offset + * - 'S' For symbolic direct pointers with offset + * - 's' For symbolic direct pointers without offset + * - 'R' For decoded struct resource, e.g., [mem 0x0-0x1f 64bit pref] + * - 'r' For raw struct resource, e.g., [mem 0x0-0x1f flags 0x201] + * - 'M' For a 6-byte MAC address, it prints the address in the + * usual colon-separated hex notation + * - 'm' For a 6-byte MAC address, it prints the hex address without colons + * - 'MF' For a 6-byte MAC FDDI address, it prints the address + * with a dash-separated hex notation + * - '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) + * - '[Ii]4[hnbl]' IPv4 addresses in host, network, big or little endian order + * - 'I6c' for IPv6 addresses printed as specified by + * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 + * - '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] + * - '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. + * - 'K' For a kernel pointer that should be hidden from unprivileged users + * + * 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. + */ +static noinline_for_stack +char *pointer(const char *fmt, char *buf, char *end, void *ptr, + struct printf_spec spec) +{ + if (!ptr) { + /* + * 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 *); + return string(buf, end, "(null)", spec); + } + + switch (*fmt) { + case 'F': + case 'f': + ptr = dereference_function_descriptor(ptr); + /* Fallthrough */ + case 'S': + case 's': + return symbol_string(buf, end, ptr, spec, *fmt); + case 'R': + case 'r': + return resource_string(buf, end, ptr, spec, fmt); + case 'M': /* Colon separated: 00:01:02:03:04:05 */ + case 'm': /* Contiguous: 000102030405 */ + /* [mM]F (FDDI, bit reversed) */ + 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 '4': + return ip4_addr_string(buf, end, ptr, spec, fmt); + } + break; + case 'V': + return buf + vsnprintf(buf, end - buf, + ((struct va_format *)ptr)->fmt, + *(((struct va_format *)ptr)->va)); + } + spec.flags |= SMALL; + if (spec.field_width == -1) { + spec.field_width = 2 * sizeof(void *); + 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, ...) + */ +static noinline_for_stack +int format_decode(const char *fmt, struct printf_spec *spec) +{ + const char *start = fmt; + + /* we finished early by reading the field width */ + if (spec->type == FORMAT_TYPE_WIDTH) { + 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 */ + spec->type = FORMAT_TYPE_WIDTH; + 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 */ + spec->type = FORMAT_TYPE_PRECISION; + return ++fmt - start; + } + } + +qualifier: + /* get the conversion qualifier */ + spec->qualifier = -1; + if (*fmt == 'h' || TOLOWER(*fmt) == 'l' || + TOLOWER(*fmt) == 'z' || *fmt == 't') { + 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; + } + } + } + + /* 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': + spec->flags |= SIGN; + case 'u': + break; + + default: + spec->type = FORMAT_TYPE_INVALID; + return fmt - start; + } + + if (spec->qualifier == 'L') + spec->type = FORMAT_TYPE_LONG_LONG; + else if (spec->qualifier == 'l') { + if (spec->flags & SIGN) + spec->type = FORMAT_TYPE_LONG; + else + spec->type = FORMAT_TYPE_ULONG; + } else if (TOLOWER(spec->qualifier) == 'z') { + spec->type = FORMAT_TYPE_SIZE_T; + } else if (spec->qualifier == 't') { + spec->type = FORMAT_TYPE_PTRDIFF; + } else if (spec->qualifier == 'H') { + if (spec->flags & SIGN) + spec->type = FORMAT_TYPE_BYTE; + else + spec->type = FORMAT_TYPE_UBYTE; + } else if (spec->qualifier == 'h') { + if (spec->flags & SIGN) + spec->type = FORMAT_TYPE_SHORT; + else + spec->type = FORMAT_TYPE_USHORT; + } else { + if (spec->flags & SIGN) + spec->type = FORMAT_TYPE_INT; + else + spec->type = FORMAT_TYPE_UINT; + } + + return ++fmt - start; +} + +/** + * 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 + * + * This function follows C99 vsnprintf, but has some extensions: + * %pS output the name of a text symbol with offset + * %ps output the name of a text symbol without offset + * %pF output the name of a function pointer with its offset + * %pf output the name of a function pointer without its offset + * %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 + * %pI6c print an IPv6 address as specified by + * http://tools.ietf.org/html/draft-ietf-6man-text-addr-representation-00 + * %pU[bBlL] print a UUID/GUID in big or little endian using lower or upper + * case. + * %n is ignored + * + * 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. + * + * Call this function if you are already dealing with a va_list. + * You probably want snprintf() instead. + */ +int vsnprintf(char *buf, size_t size, const char *fmt, va_list args) +{ + unsigned long long num; + char *str, *end; + struct printf_spec spec = {0}; + + /* Reject out-of-range values early. Large positive sizes are + used for unknown buffer sizes. */ + if ((int)size < 0) + return 0; + + str = buf; + end = buf + size; + + /* Make sure end is always >= buf */ + if (end < buf) { + end = ((void *)-1); + size = end - buf; + } + + while (*fmt) { + const char *old_fmt = fmt; + int read = format_decode(fmt, &spec); + + fmt += read; + + 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); + } + str += read; + break; + } + + case FORMAT_TYPE_WIDTH: + spec.field_width = va_arg(args, int); + break; + + case FORMAT_TYPE_PRECISION: + spec.precision = va_arg(args, int); + break; + + case FORMAT_TYPE_CHAR: { + char c; + + if (!(spec.flags & LEFT)) { + while (--spec.field_width > 0) { + if (str < end) + *str = ' '; + ++str; + + } + } + c = (unsigned char) va_arg(args, int); + if (str < end) + *str = c; + ++str; + while (--spec.field_width > 0) { + if (str < end) + *str = ' '; + ++str; + } + break; + } + + case FORMAT_TYPE_STR: + str = string(str, end, va_arg(args, char *), spec); + break; + + case FORMAT_TYPE_PTR: + str = pointer(fmt+1, str, end, va_arg(args, void *), + spec); + while (isalnum(*fmt)) + fmt++; + break; + + case FORMAT_TYPE_PERCENT_CHAR: + if (str < end) + *str = '%'; + ++str; + break; + + case FORMAT_TYPE_INVALID: + if (str < end) + *str = '%'; + ++str; + break; + + case FORMAT_TYPE_NRCHARS: { + u8 qualifier = spec.qualifier; + + if (qualifier == 'l') { + long *ip = va_arg(args, long *); + *ip = (str - buf); + } else if (TOLOWER(qualifier) == 'z') { + size_t *ip = va_arg(args, size_t *); + *ip = (str - buf); + } else { + int *ip = va_arg(args, int *); + *ip = (str - buf); + } + break; + } + + 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; + case FORMAT_TYPE_UBYTE: + num = (unsigned char) va_arg(args, int); + break; + case FORMAT_TYPE_BYTE: + num = (signed char) va_arg(args, int); + break; + case FORMAT_TYPE_USHORT: + num = (unsigned short) va_arg(args, int); + break; + case FORMAT_TYPE_SHORT: + num = (short) va_arg(args, int); + break; + case FORMAT_TYPE_INT: + num = (int) va_arg(args, int); + break; + default: + num = va_arg(args, unsigned int); + } + + str = number(str, end, num, spec); + } + } + + if (size > 0) { + if (str < end) + *str = '\0'; + else + end[-1] = '\0'; + } + + /* the trailing null byte doesn't count towards the total */ + return str-buf; + +} +EXPORT_SYMBOL(vsnprintf); + +int vsprintf(char *buf, const char *fmt, va_list args) +{ + return vsnprintf(buf, INT_MAX, fmt, args); +} + + +/** + * 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. + * + * See the vsnprintf() documentation for format string extensions over C99. + */ +int snprintf(char *buf, size_t size, const char *fmt, ...) +{ + va_list args; + int i; + + va_start(args, fmt); + i = vsnprintf(buf, size, fmt, args); + va_end(args); + + return i; +} +EXPORT_SYMBOL(snprintf); + + +/** + * 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 + * into @buf. Use snprintf() or scnprintf() in order to avoid + * buffer overflows. + * + * See the vsnprintf() documentation for format string extensions over C99. + */ +int sprintf(char *buf, const char *fmt, ...) +{ + va_list args; + int i; + + va_start(args, fmt); + i = vsnprintf(buf, INT_MAX, fmt, args); + va_end(args); + + return i; +} +