/*
- ****************************************************************************
- * (C) 2003 - Rolf Neugebauer - Intel Research Cambridge
****************************************************************************
*
* File: printf.c
- * Author: Rolf Neugebauer (neugebar@dcs.gla.ac.uk)
- * Changes: Grzegorz Milos (gm281@cam.ac.uk)
+ * Author: Juergen Gross <jgross@suse.com>
*
- * Date: Aug 2003, Aug 2005
+ * Date: Jun 2016
*
* Environment: Xen Minimal OS
* Description: Library functions for printing
- * (Linux port, mainly lib/vsprintf.c)
+ * (FreeBSD port)
*
****************************************************************************
*/
-/*
- * 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 <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
+/*-
+ * Copyright (c) 1990, 1993
+ * The Regents of the University of California. All rights reserved.
*
+ * This code is derived from software contributed to Berkeley by
+ * Chris Torek.
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
+ * Copyright (c) 2011 The FreeBSD Foundation
+ * All rights reserved.
+ * Portions of this software were developed by David Chisnall
+ * under sponsorship from the FreeBSD Foundation.
*
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
*
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
*/
#if !defined HAVE_LIBC
#include <mini-os/ctype.h>
#include <mini-os/posix/limits.h>
-/**
- * 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)
-{
- unsigned long result = 0,value;
-
- if (!base) {
- base = 10;
- if (*cp == '0') {
- base = 8;
- cp++;
- if ((*cp == 'x') && isxdigit(cp[1])) {
- cp++;
- base = 16;
- }
- }
- }
- while (isxdigit(*cp) &&
- (value = isdigit(*cp) ? *cp-'0' : toupper(*cp)-'A'+10) < base) {
- result = result*base + value;
- cp++;
- }
- if (endp)
- *endp = (char *)cp;
- return result;
-}
+#define __DECONST(type, var) ((type)(uintptr_t)(const void *)(var))
+/* 64 bits + 0-Byte at end */
+#define MAXNBUF 65
-/**
- * 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
+static char const hex2ascii_data[] = "0123456789abcdefghijklmnopqrstuvwxyz";
+/*
+ * Put a NUL-terminated ASCII number (base <= 36) in a buffer in reverse
+ * order; return an optional length and a pointer to the last character
+ * written in the buffer (i.e., the first character of the string).
+ * The buffer pointed to by `nbuf' must have length >= MAXNBUF.
*/
-long simple_strtol(const char *cp,char **endp,unsigned int base)
+static char *
+ksprintn(char *nbuf, uintmax_t num, int base, int *lenp, int upper)
{
- if(*cp=='-')
- return -simple_strtoul(cp+1,endp,base);
- return simple_strtoul(cp,endp,base);
+ char *p, c;
+
+ p = nbuf;
+ *p = '\0';
+ do {
+ c = hex2ascii_data[num % base];
+ *++p = upper ? toupper(c) : c;
+ } while (num /= base);
+ if (lenp)
+ *lenp = p - nbuf;
+ return (p);
}
-/**
- * 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
+/*
+ * Convert a string to an unsigned long integer.
+ *
+ * Ignores `locale' stuff. Assumes that the upper and lower case
+ * alphabets and digits are each contiguous.
*/
-unsigned long long simple_strtoull(const char *cp,char **endp,unsigned int base)
+unsigned long
+strtoul(const char *nptr, char **endptr, int base)
{
- unsigned long long result = 0,value;
-
- if (!base) {
- base = 10;
- if (*cp == '0') {
- base = 8;
- cp++;
- if ((*cp == 'x') && isxdigit(cp[1])) {
- cp++;
+ const char *s = nptr;
+ unsigned long acc;
+ unsigned char c;
+ unsigned long cutoff;
+ int neg = 0, any, cutlim;
+
+ /*
+ * See strtol for comments as to the logic used.
+ */
+ do {
+ c = *s++;
+ } while (isspace(c));
+ if (c == '-') {
+ neg = 1;
+ c = *s++;
+ } else if (c == '+')
+ c = *s++;
+ if ((base == 0 || base == 16) &&
+ c == '0' && (*s == 'x' || *s == 'X')) {
+ c = s[1];
+ s += 2;
base = 16;
- }
}
- }
- while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp)
- ? toupper(*cp) : *cp)-'A'+10) < base) {
- result = result*base + value;
- cp++;
- }
- if (endp)
- *endp = (char *)cp;
- return result;
+ if (base == 0)
+ base = c == '0' ? 8 : 10;
+ cutoff = (unsigned long)ULONG_MAX / (unsigned long)base;
+ cutlim = (unsigned long)ULONG_MAX % (unsigned long)base;
+ for (acc = 0, any = 0;; c = *s++) {
+ if (!isascii(c))
+ break;
+ if (isdigit(c))
+ c -= '0';
+ else if (isalpha(c))
+ c -= isupper(c) ? 'A' - 10 : 'a' - 10;
+ else
+ break;
+ if (c >= base)
+ break;
+ if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
+ any = -1;
+ else {
+ any = 1;
+ acc *= base;
+ acc += c;
+ }
+ }
+ if (any < 0) {
+ acc = ULONG_MAX;
+ } else if (neg)
+ acc = -acc;
+ if (endptr != 0)
+ *endptr = __DECONST(char *, any ? s - 1 : nptr);
+ return (acc);
}
-/**
- * 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
+/*
+ * Convert a string to a quad integer.
+ *
+ * Ignores `locale' stuff. Assumes that the upper and lower case
+ * alphabets and digits are each contiguous.
*/
-long long simple_strtoll(const char *cp,char **endp,unsigned int base)
+int64_t
+strtoq(const char *nptr, char **endptr, int base)
{
- if(*cp=='-')
- return -simple_strtoull(cp+1,endp,base);
- return simple_strtoull(cp,endp,base);
-}
+ const char *s;
+ uint64_t acc;
+ unsigned char c;
+ uint64_t qbase, cutoff;
+ int neg, any, cutlim;
-static int skip_atoi(const char **s)
-{
- int i=0;
+ /*
+ * Skip white space and pick up leading +/- sign if any.
+ * If base is 0, allow 0x for hex and 0 for octal, else
+ * assume decimal; if base is already 16, allow 0x.
+ */
+ s = nptr;
+ do {
+ c = *s++;
+ } while (isspace(c));
+ if (c == '-') {
+ neg = 1;
+ c = *s++;
+ } else {
+ neg = 0;
+ if (c == '+')
+ c = *s++;
+ }
+ if ((base == 0 || base == 16) &&
+ c == '0' && (*s == 'x' || *s == 'X')) {
+ c = s[1];
+ s += 2;
+ base = 16;
+ }
+ if (base == 0)
+ base = c == '0' ? 8 : 10;
- while (isdigit(**s))
- i = i*10 + *((*s)++) - '0';
- return i;
+ /*
+ * Compute the cutoff value between legal numbers and illegal
+ * numbers. That is the largest legal value, divided by the
+ * base. An input number that is greater than this value, if
+ * followed by a legal input character, is too big. One that
+ * is equal to this value may be valid or not; the limit
+ * between valid and invalid numbers is then based on the last
+ * digit. For instance, if the range for quads is
+ * [-9223372036854775808..9223372036854775807] and the input base
+ * is 10, cutoff will be set to 922337203685477580 and cutlim to
+ * either 7 (neg==0) or 8 (neg==1), meaning that if we have
+ * accumulated a value > 922337203685477580, or equal but the
+ * next digit is > 7 (or 8), the number is too big, and we will
+ * return a range error.
+ *
+ * Set any if any `digits' consumed; make it negative to indicate
+ * overflow.
+ */
+ qbase = (unsigned)base;
+ cutoff = neg ? (uint64_t)-(LLONG_MIN + LLONG_MAX) + LLONG_MAX : LLONG_MAX;
+ cutlim = cutoff % qbase;
+ cutoff /= qbase;
+ for (acc = 0, any = 0;; c = *s++) {
+ if (!isascii(c))
+ break;
+ if (isdigit(c))
+ c -= '0';
+ else if (isalpha(c))
+ c -= isupper(c) ? 'A' - 10 : 'a' - 10;
+ else
+ break;
+ if (c >= base)
+ break;
+ if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
+ any = -1;
+ else {
+ any = 1;
+ acc *= qbase;
+ acc += c;
+ }
+ }
+ if (any < 0) {
+ acc = neg ? LLONG_MIN : LLONG_MAX;
+ } else if (neg)
+ acc = -acc;
+ if (endptr != 0)
+ *endptr = __DECONST(char *, any ? s - 1 : nptr);
+ return (acc);
}
-#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 SPECIAL 32 /* 0x */
-#define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
-
-static char * number(char * buf, char * end, long long num, int base, int size, int precision, int type)
+/*
+ * Convert a string to an unsigned quad integer.
+ *
+ * Ignores `locale' stuff. Assumes that the upper and lower case
+ * alphabets and digits are each contiguous.
+ */
+uint64_t
+strtouq(const char *nptr, char **endptr, int base)
{
- char c,sign,tmp[66];
- const char *digits;
- const char small_digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
- const char large_digits[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
- int i;
+ const char *s = nptr;
+ uint64_t acc;
+ unsigned char c;
+ uint64_t qbase, cutoff;
+ int neg, any, cutlim;
- digits = (type & LARGE) ? large_digits : small_digits;
- if (type & LEFT)
- type &= ~ZEROPAD;
- if (base < 2 || base > 36)
- return buf;
- c = (type & ZEROPAD) ? '0' : ' ';
- sign = 0;
- if (type & SIGN) {
- if (num < 0) {
- sign = '-';
- num = -num;
- size--;
- } else if (type & PLUS) {
- sign = '+';
- size--;
- } else if (type & SPACE) {
- sign = ' ';
- size--;
- }
- }
- if (type & SPECIAL) {
- if (base == 16)
- size -= 2;
- else if (base == 8)
- size--;
- }
- i = 0;
- if (num == 0)
- tmp[i++]='0';
- else
- {
- /* XXX KAF: force unsigned mod and div. */
- unsigned long long num2=(unsigned long long)num;
- unsigned int base2=(unsigned int)base;
- while (num2 != 0) { tmp[i++] = digits[num2%base2]; num2 /= base2; }
- }
- if (i > precision)
- precision = i;
- size -= precision;
- if (!(type&(ZEROPAD+LEFT))) {
- while(size-->0) {
- if (buf <= end)
- *buf = ' ';
- ++buf;
+ /*
+ * See strtoq for comments as to the logic used.
+ */
+ do {
+ c = *s++;
+ } while (isspace(c));
+ if (c == '-') {
+ neg = 1;
+ c = *s++;
+ } else {
+ neg = 0;
+ if (c == '+')
+ c = *s++;
}
- }
- if (sign) {
- if (buf <= end)
- *buf = sign;
- ++buf;
- }
- if (type & SPECIAL) {
- if (base==8) {
- if (buf <= end)
- *buf = '0';
- ++buf;
- } else if (base==16) {
- if (buf <= end)
- *buf = '0';
- ++buf;
- if (buf <= end)
- *buf = digits[33];
- ++buf;
+ if ((base == 0 || base == 16) &&
+ c == '0' && (*s == 'x' || *s == 'X')) {
+ c = s[1];
+ s += 2;
+ base = 16;
}
- }
- if (!(type & LEFT)) {
- while (size-- > 0) {
- if (buf <= end)
- *buf = c;
- ++buf;
+ if (base == 0)
+ base = c == '0' ? 8 : 10;
+ qbase = (unsigned)base;
+ cutoff = (uint64_t)ULLONG_MAX / qbase;
+ cutlim = (uint64_t)ULLONG_MAX % qbase;
+ for (acc = 0, any = 0;; c = *s++) {
+ if (!isascii(c))
+ break;
+ if (isdigit(c))
+ c -= '0';
+ else if (isalpha(c))
+ c -= isupper(c) ? 'A' - 10 : 'a' - 10;
+ else
+ break;
+ if (c >= base)
+ break;
+ if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
+ any = -1;
+ else {
+ any = 1;
+ acc *= qbase;
+ acc += c;
+ }
}
- }
- while (i < precision--) {
- if (buf <= end)
- *buf = '0';
- ++buf;
- }
- while (i-- > 0) {
- if (buf <= end)
- *buf = tmp[i];
- ++buf;
- }
- while (size-- > 0) {
- if (buf <= end)
- *buf = ' ';
- ++buf;
- }
- return buf;
+ if (any < 0) {
+ acc = ULLONG_MAX;
+ } else if (neg)
+ acc = -acc;
+ if (endptr != 0)
+ *endptr = __DECONST(char *, any ? s - 1 : nptr);
+ return (acc);
}
-/**
-* 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
-*
-* Call this function if you are already dealing with a va_list.
-* You probably want snprintf instead.
+/*
+ * Scaled down version of printf(3).
*/
-int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
+int
+vsnprintf(char *str, size_t size, char const *fmt, va_list ap)
{
- int len;
- unsigned long long num;
- int i, base;
- char *str, *end, c;
- const char *s;
-
- int flags; /* flags to number() */
-
- int field_width; /* width of output field */
- int precision; /* min. # of digits for integers; max
- number of chars for from string */
- int qualifier; /* 'h', 'l', or 'L' for integer fields */
- /* 'z' support added 23/7/1999 S.H. */
- /* 'z' changed to 'Z' --davidm 1/25/99 */
-
- str = buf;
- end = buf + size - 1;
-
- if (end < buf - 1) {
- end = ((void *) -1);
- size = end - buf + 1;
- }
-
- for (; *fmt ; ++fmt) {
- if (*fmt != '%') {
- if (str <= end)
- *str = *fmt;
- ++str;
- continue;
- }
+#define PCHAR(c) { if (size >= 2) { *str++ = c; size--; } retval++; }
+ char nbuf[MAXNBUF];
+ const char *p, *percent;
+ int ch, n;
+ uintmax_t num;
+ int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
+ int cflag, hflag, jflag, tflag, zflag;
+ int dwidth, upper;
+ char padc;
+ int stop = 0, retval = 0;
- /* process flags */
- flags = 0;
- repeat:
- ++fmt; /* this also skips first '%' */
- switch (*fmt) {
- case '-': flags |= LEFT; goto repeat;
- case '+': flags |= PLUS; goto repeat;
- case ' ': flags |= SPACE; goto repeat;
- case '#': flags |= SPECIAL; goto repeat;
- case '0': flags |= ZEROPAD; goto repeat;
- }
+ num = 0;
- /* get field width */
- field_width = -1;
- if (isdigit(*fmt))
- field_width = skip_atoi(&fmt);
- else if (*fmt == '*') {
- ++fmt;
- /* it's the next argument */
- field_width = va_arg(args, int);
- if (field_width < 0) {
- field_width = -field_width;
- flags |= LEFT;
- }
- }
+ if (fmt == NULL)
+ fmt = "(fmt null)\n";
- /* get the precision */
- precision = -1;
- if (*fmt == '.') {
- ++fmt;
- if (isdigit(*fmt))
- precision = skip_atoi(&fmt);
- else if (*fmt == '*') {
- ++fmt;
- /* it's the next argument */
- precision = va_arg(args, int);
- }
- if (precision < 0)
- precision = 0;
- }
+ for (;;) {
+ padc = ' ';
+ width = 0;
+ while ((ch = (u_char)*fmt++) != '%' || stop) {
+ if (ch == '\0') {
+ if (size >= 1)
+ *str++ = '\0';
+ return (retval);
+ }
+ PCHAR(ch);
+ }
+ percent = fmt - 1;
+ qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
+ sign = 0; dot = 0; dwidth = 0; upper = 0;
+ cflag = 0; hflag = 0; jflag = 0; tflag = 0; zflag = 0;
+reswitch: switch (ch = (u_char)*fmt++) {
+ case '.':
+ dot = 1;
+ goto reswitch;
+ case '#':
+ sharpflag = 1;
+ goto reswitch;
+ case '+':
+ sign = 1;
+ goto reswitch;
+ case '-':
+ ladjust = 1;
+ goto reswitch;
+ case '%':
+ PCHAR(ch);
+ break;
+ case '*':
+ if (!dot) {
+ width = va_arg(ap, int);
+ if (width < 0) {
+ ladjust = !ladjust;
+ width = -width;
+ }
+ } else {
+ dwidth = va_arg(ap, int);
+ }
+ goto reswitch;
+ case '0':
+ if (!dot) {
+ padc = '0';
+ goto reswitch;
+ }
+ case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ for (n = 0;; ++fmt) {
+ n = n * 10 + ch - '0';
+ ch = *fmt;
+ if (ch < '0' || ch > '9')
+ break;
+ }
+ if (dot)
+ dwidth = n;
+ else
+ width = n;
+ goto reswitch;
+ case 'c':
+ PCHAR(va_arg(ap, int));
+ break;
+ case 'd':
+ case 'i':
+ base = 10;
+ sign = 1;
+ goto handle_sign;
+ case 'h':
+ if (hflag) {
+ hflag = 0;
+ cflag = 1;
+ } else
+ hflag = 1;
+ goto reswitch;
+ case 'j':
+ jflag = 1;
+ goto reswitch;
+ case 'l':
+ if (lflag) {
+ lflag = 0;
+ qflag = 1;
+ } else
+ lflag = 1;
+ goto reswitch;
+ case 'n':
+ if (jflag)
+ *(va_arg(ap, intmax_t *)) = retval;
+ else if (qflag)
+ *(va_arg(ap, int64_t *)) = retval;
+ else if (lflag)
+ *(va_arg(ap, long *)) = retval;
+ else if (zflag)
+ *(va_arg(ap, size_t *)) = retval;
+ else if (hflag)
+ *(va_arg(ap, short *)) = retval;
+ else if (cflag)
+ *(va_arg(ap, char *)) = retval;
+ else
+ *(va_arg(ap, int *)) = retval;
+ break;
+ case 'o':
+ base = 8;
+ goto handle_nosign;
+ case 'p':
+ base = 16;
+ sharpflag = (width == 0);
+ sign = 0;
+ num = (uintptr_t)va_arg(ap, void *);
+ goto number;
+ case 'q':
+ qflag = 1;
+ goto reswitch;
+ case 'r':
+ base = 10;
+ if (sign)
+ goto handle_sign;
+ goto handle_nosign;
+ case 's':
+ p = va_arg(ap, char *);
+ if (p == NULL)
+ p = "(null)";
+ if (!dot)
+ n = strlen (p);
+ else
+ for (n = 0; n < dwidth && p[n]; n++)
+ continue;
- /* get the conversion qualifier */
- qualifier = -1;
- if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' || *fmt =='Z' || *fmt == 'z') {
- qualifier = *fmt;
- ++fmt;
- if (qualifier == 'l' && *fmt == 'l') {
- qualifier = 'L';
- ++fmt;
- } else if (qualifier == 'z') {
- qualifier = 'Z';
- }
- }
- if (*fmt == 'q') {
- qualifier = 'L';
- ++fmt;
- }
+ width -= n;
- /* default base */
- base = 10;
+ if (!ladjust && width > 0)
+ while (width--)
+ PCHAR(padc);
+ while (n--)
+ PCHAR(*p++);
+ if (ladjust && width > 0)
+ while (width--)
+ PCHAR(padc);
+ break;
+ case 't':
+ tflag = 1;
+ goto reswitch;
+ case 'u':
+ base = 10;
+ goto handle_nosign;
+ case 'X':
+ upper = 1;
+ case 'x':
+ base = 16;
+ goto handle_nosign;
+ case 'y':
+ base = 16;
+ sign = 1;
+ goto handle_sign;
+ case 'z':
+ zflag = 1;
+ goto reswitch;
+handle_nosign:
+ sign = 0;
+ if (jflag)
+ num = va_arg(ap, uintmax_t);
+ else if (qflag)
+ num = va_arg(ap, uint64_t);
+ else if (tflag)
+ num = va_arg(ap, ptrdiff_t);
+ else if (lflag)
+ num = va_arg(ap, u_long);
+ else if (zflag)
+ num = va_arg(ap, size_t);
+ else if (hflag)
+ num = (unsigned short)va_arg(ap, int);
+ else if (cflag)
+ num = (u_char)va_arg(ap, int);
+ else
+ num = va_arg(ap, u_int);
+ goto number;
+handle_sign:
+ if (jflag)
+ num = va_arg(ap, intmax_t);
+ else if (qflag)
+ num = va_arg(ap, int64_t);
+ else if (tflag)
+ num = va_arg(ap, ptrdiff_t);
+ else if (lflag)
+ num = va_arg(ap, long);
+ else if (zflag)
+ num = va_arg(ap, ssize_t);
+ else if (hflag)
+ num = (short)va_arg(ap, int);
+ else if (cflag)
+ num = (char)va_arg(ap, int);
+ else
+ num = va_arg(ap, int);
+number:
+ if (sign && (intmax_t)num < 0) {
+ neg = 1;
+ num = -(intmax_t)num;
+ }
+ p = ksprintn(nbuf, num, base, &n, upper);
+ tmp = 0;
+ if (sharpflag && num != 0) {
+ if (base == 8)
+ tmp++;
+ else if (base == 16)
+ tmp += 2;
+ }
+ if (neg)
+ tmp++;
- switch (*fmt) {
- case 'c':
- if (!(flags & LEFT)) {
- while (--field_width > 0) {
- if (str <= end)
- *str = ' ';
- ++str;
- }
- }
- c = (unsigned char) va_arg(args, int);
- if (str <= end)
- *str = c;
- ++str;
- while (--field_width > 0) {
- if (str <= end)
- *str = ' ';
- ++str;
- }
- continue;
-
- case 's':
- s = va_arg(args, char *);
- if (!s)
- s = "<NULL>";
-
- len = strnlen(s, precision);
-
- if (!(flags & LEFT)) {
- while (len < field_width--) {
- if (str <= end)
- *str = ' ';
- ++str;
+ if (!ladjust && padc == '0')
+ dwidth = width - tmp;
+ width -= tmp + (dwidth > n ? dwidth : n);
+ dwidth -= n;
+ if (!ladjust)
+ while (width-- > 0)
+ PCHAR(' ');
+ if (neg)
+ PCHAR('-');
+ if (sharpflag && num != 0) {
+ if (base == 8) {
+ PCHAR('0');
+ } else if (base == 16) {
+ PCHAR('0');
+ PCHAR('x');
+ }
+ }
+ while (dwidth-- > 0)
+ PCHAR('0');
+
+ while (*p)
+ PCHAR(*p--);
+
+ if (ladjust)
+ while (width-- > 0)
+ PCHAR(' ');
+
+ break;
+ default:
+ while (percent < fmt)
+ PCHAR(*percent++);
+ /*
+ * Since we ignore a formatting argument it is no
+ * longer safe to obey the remaining formatting
+ * arguments as the arguments will no longer match
+ * the format specs.
+ */
+ stop = 1;
+ break;
}
- }
- for (i = 0; i < len; ++i) {
- if (str <= end)
- *str = *s;
- ++str; ++s;
- }
- while (len < field_width--) {
- if (str <= end)
- *str = ' ';
- ++str;
- }
- continue;
-
- case 'p':
- if (field_width == -1) {
- field_width = 2*sizeof(void *);
- flags |= ZEROPAD;
- }
- str = number(str, end,
- (unsigned long) va_arg(args, void *),
- 16, field_width, precision, flags);
- continue;
-
-
- case 'n':
- if (qualifier == 'l') {
- long * ip = va_arg(args, long *);
- *ip = (str - buf);
- } else if (qualifier == 'Z') {
- size_t * ip = va_arg(args, size_t *);
- *ip = (str - buf);
- } else {
- int * ip = va_arg(args, int *);
- *ip = (str - buf);
- }
- continue;
-
- case '%':
- if (str <= end)
- *str = '%';
- ++str;
- continue;
-
- /* integer number formats - set up the flags and "break" */
- case 'o':
- base = 8;
- break;
-
- case 'X':
- flags |= LARGE;
- case 'x':
- base = 16;
- break;
-
- case 'd':
- case 'i':
- flags |= SIGN;
- case 'u':
- break;
-
- default:
- if (str <= end)
- *str = '%';
- ++str;
- if (*fmt) {
- if (str <= end)
- *str = *fmt;
- ++str;
- } else {
- --fmt;
- }
- continue;
- }
- if (qualifier == 'L')
- num = va_arg(args, long long);
- else if (qualifier == 'l') {
- num = va_arg(args, unsigned long);
- if (flags & SIGN)
- num = (signed long) num;
- } else if (qualifier == 'Z') {
- num = va_arg(args, size_t);
- } else if (qualifier == 'h') {
- num = (unsigned short) va_arg(args, int);
- if (flags & SIGN)
- num = (signed short) num;
- } else {
- num = va_arg(args, unsigned int);
- if (flags & SIGN)
- num = (signed int) num;
}
-
- str = number(str, end, num, base,
- field_width, precision, flags);
- }
- if (str <= end)
- *str = '\0';
- else if (size > 0)
- /* don't write out a null byte if the buf size is zero */
- *end = '\0';
- /* the trailing null byte doesn't count towards the total
- * ++str;
- */
- return str-buf;
+#undef PCHAR
}
/**
return i;
}
+/*
+ * Fill in the given table from the scanset at the given format
+ * (just after `['). Return a pointer to the character past the
+ * closing `]'. The table has a 1 wherever characters should be
+ * considered part of the scanset.
+ */
+static const u_char *
+__sccl(char *tab, const u_char *fmt)
+{
+ int c, n, v;
+
+ /* first `clear' the whole table */
+ c = *fmt++; /* first char hat => negated scanset */
+ if (c == '^') {
+ v = 1; /* default => accept */
+ c = *fmt++; /* get new first char */
+ } else
+ v = 0; /* default => reject */
+
+ /* XXX: Will not work if sizeof(tab*) > sizeof(char) */
+ for (n = 0; n < 256; n++)
+ tab[n] = v; /* memset(tab, v, 256) */
+
+ if (c == 0)
+ return (fmt - 1);/* format ended before closing ] */
+
+ /*
+ * Now set the entries corresponding to the actual scanset
+ * to the opposite of the above.
+ *
+ * The first character may be ']' (or '-') without being special;
+ * the last character may be '-'.
+ */
+ v = 1 - v;
+ for (;;) {
+ tab[c] = v; /* take character c */
+doswitch:
+ n = *fmt++; /* and examine the next */
+ switch (n) {
+
+ case 0: /* format ended too soon */
+ return (fmt - 1);
+
+ case '-':
+ /*
+ * A scanset of the form
+ * [01+-]
+ * is defined as `the digit 0, the digit 1,
+ * the character +, the character -', but
+ * the effect of a scanset such as
+ * [a-zA-Z0-9]
+ * is implementation defined. The V7 Unix
+ * scanf treats `a-z' as `the letters a through
+ * z', but treats `a-a' as `the letter a, the
+ * character -, and the letter a'.
+ *
+ * For compatibility, the `-' is not considerd
+ * to define a range if the character following
+ * it is either a close bracket (required by ANSI)
+ * or is not numerically greater than the character
+ * we just stored in the table (c).
+ */
+ n = *fmt;
+ if (n == ']' || n < c) {
+ c = '-';
+ break; /* resume the for(;;) */
+ }
+ fmt++;
+ /* fill in the range */
+ do {
+ tab[++c] = v;
+ } while (c < n);
+ c = n;
+ /*
+ * Alas, the V7 Unix scanf also treats formats
+ * such as [a-c-e] as `the letters a through e'.
+ * This too is permitted by the standard....
+ */
+ goto doswitch;
+ break;
+
+ case ']': /* end of scanset */
+ return (fmt);
+
+ default: /* just another character */
+ c = n;
+ break;
+ }
+ }
+ /* NOTREACHED */
+}
+
/**
* vsscanf - Unformat a buffer into a list of arguments
* @buf: input buffer
* @fmt: format of buffer
* @args: arguments
*/
-int vsscanf(const char * buf, const char * fmt, va_list args)
+#define BUF 32 /* Maximum length of numeric string. */
+
+/*
+ * Flags used during conversion.
+ */
+#define LONG 0x01 /* l: long or double */
+#define SHORT 0x04 /* h: short */
+#define SUPPRESS 0x08 /* suppress assignment */
+#define POINTER 0x10 /* weird %p pointer (`fake hex') */
+#define NOSKIP 0x20 /* do not skip blanks */
+#define QUAD 0x400
+#define SHORTSHORT 0x4000 /** hh: char */
+
+/*
+ * The following are used in numeric conversions only:
+ * SIGNOK, NDIGITS, DPTOK, and EXPOK are for floating point;
+ * SIGNOK, NDIGITS, PFXOK, and NZDIGITS are for integral.
+ */
+#define SIGNOK 0x40 /* +/- is (still) legal */
+#define NDIGITS 0x80 /* no digits detected */
+
+#define DPTOK 0x100 /* (float) decimal point is still legal */
+#define EXPOK 0x200 /* (float) exponent (e+3, etc) still legal */
+
+#define PFXOK 0x100 /* 0x prefix is (still) legal */
+#define NZDIGITS 0x200 /* no zero digits detected */
+
+/*
+ * Conversion types.
+ */
+#define CT_CHAR 0 /* %c conversion */
+#define CT_CCL 1 /* %[...] conversion */
+#define CT_STRING 2 /* %s conversion */
+#define CT_INT 3 /* integer, i.e., strtoq or strtouq */
+typedef uint64_t (*ccfntype)(const char *, char **, int);
+
+int
+vsscanf(const char *inp, char const *fmt0, va_list ap)
{
- const char *str = buf;
- char *next;
- char digit;
- int num = 0;
- int qualifier;
- int base;
- int field_width;
- int is_sign = 0;
-
- while(*fmt && *str) {
- /* skip any white space in format */
- /* white space in format matchs any amount of
- * white space, including none, in the input.
- */
- if (isspace(*fmt)) {
- while (isspace(*fmt))
- ++fmt;
- while (isspace(*str))
- ++str;
- }
-
- /* anything that is not a conversion must match exactly */
- if (*fmt != '%' && *fmt) {
- if (*fmt++ != *str++)
- break;
- continue;
- }
-
- if (!*fmt)
- break;
- ++fmt;
-
- /* skip this conversion.
- * advance both strings to next white space
- */
- if (*fmt == '*') {
- while (!isspace(*fmt) && *fmt)
- 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;
- if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
- *fmt == 'Z' || *fmt == 'z') {
- qualifier = *fmt++;
- if (unlikely(qualifier == *fmt)) {
- if (qualifier == 'h') {
- qualifier = 'H';
- fmt++;
- } else if (qualifier == 'l') {
- qualifier = 'L';
- fmt++;
- }
- }
- }
- base = 10;
- is_sign = 0;
-
- if (!*fmt || !*str)
- break;
-
- switch(*fmt++) {
- case 'c':
- {
- char *s = (char *) va_arg(args,char*);
- if (field_width == -1)
- field_width = 1;
- do {
- *s++ = *str++;
- } while (--field_width > 0 && *str);
- num++;
- }
- continue;
- case 's':
- {
- char *s = (char *) va_arg(args, char *);
- if(field_width == -1)
- field_width = INT_MAX;
- /* first, skip leading white space in buffer */
- while (isspace(*str))
- str++;
-
- /* now copy until next white space */
- while (*str && !isspace(*str) && field_width--) {
- *s++ = *str++;
- }
- *s = '\0';
- num++;
- }
- continue;
- case 'n':
- /* return number of characters read so far */
- {
- int *i = (int *)va_arg(args,int*);
- *i = str - buf;
- }
- continue;
- case 'o':
- base = 8;
- break;
- case 'x':
- case 'X':
- base = 16;
- break;
- case 'i':
+ int inr;
+ const u_char *fmt = (const u_char *)fmt0;
+ int c; /* character from format, or conversion */
+ size_t width; /* field width, or 0 */
+ char *p; /* points into all kinds of strings */
+ int n; /* handy integer */
+ int flags; /* flags as defined above */
+ char *p0; /* saves original value of p when necessary */
+ int nassigned; /* number of fields assigned */
+ int nconversions; /* number of conversions */
+ int nread; /* number of characters consumed from fp */
+ int base; /* base argument to strtoq/strtouq */
+ ccfntype ccfn; /* conversion function (strtoq/strtouq) */
+ char ccltab[256]; /* character class table for %[...] */
+ char buf[BUF]; /* buffer for numeric conversions */
+
+ /* `basefix' is used to avoid `if' tests in the integer scanner */
+ static short basefix[17] =
+ { 10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16 };
+
+ inr = strlen(inp);
+
+ nassigned = 0;
+ nconversions = 0;
+ nread = 0;
+ base = 0; /* XXX just to keep gcc happy */
+ ccfn = NULL; /* XXX just to keep gcc happy */
+ for (;;) {
+ c = *fmt++;
+ if (c == 0)
+ return (nassigned);
+ if (isspace(c)) {
+ while (inr > 0 && isspace(*inp))
+ nread++, inr--, inp++;
+ continue;
+ }
+ if (c != '%')
+ goto literal;
+ width = 0;
+ flags = 0;
+ /*
+ * switch on the format. continue if done;
+ * break once format type is derived.
+ */
+again: c = *fmt++;
+ switch (c) {
+ case '%':
+literal:
+ if (inr <= 0)
+ goto input_failure;
+ if (*inp != c)
+ goto match_failure;
+ inr--, inp++;
+ nread++;
+ continue;
+
+ case '*':
+ flags |= SUPPRESS;
+ goto again;
+ case 'l':
+ if (flags & LONG){
+ flags &= ~LONG;
+ flags |= QUAD;
+ } else {
+ flags |= LONG;
+ }
+ goto again;
+ case 'q':
+ flags |= QUAD;
+ goto again;
+ case 'h':
+ if (flags & SHORT){
+ flags &= ~SHORT;
+ flags |= SHORTSHORT;
+ } else {
+ flags |= SHORT;
+ }
+ goto again;
+
+ case '0': case '1': case '2': case '3': case '4':
+ case '5': case '6': case '7': case '8': case '9':
+ width = width * 10 + c - '0';
+ goto again;
+
+ /*
+ * Conversions.
+ *
+ */
+ case 'd':
+ c = CT_INT;
+ ccfn = (ccfntype)strtoq;
+ base = 10;
+ break;
+
+ case 'i':
+ c = CT_INT;
+ ccfn = (ccfntype)strtoq;
base = 0;
- case 'd':
- is_sign = 1;
- case 'u':
- break;
- case '%':
- /* looking for '%' in str */
- if (*str++ != '%')
- return num;
- continue;
- default:
- /* invalid format; stop here */
- return num;
- }
-
- /* have some sort of integer conversion.
- * first, skip white space in buffer.
- */
- while (isspace(*str))
- str++;
-
- digit = *str;
- if (is_sign && digit == '-')
- digit = *(str + 1);
-
- if (!digit
- || (base == 16 && !isxdigit(digit))
- || (base == 10 && !isdigit(digit))
- || (base == 8 && (!isdigit(digit) || digit > '7'))
- || (base == 0 && !isdigit(digit)))
- break;
-
- switch(qualifier) {
- case 'H': /* that's 'hh' in format */
- if (is_sign) {
- signed char *s = (signed char *) va_arg(args,signed char *);
- *s = (signed char) simple_strtol(str,&next,base);
- } else {
- unsigned char *s = (unsigned char *) va_arg(args, unsigned char *);
- *s = (unsigned char) simple_strtoul(str, &next, base);
- }
- break;
- case 'h':
- if (is_sign) {
- short *s = (short *) va_arg(args,short *);
- *s = (short) simple_strtol(str,&next,base);
- } else {
- unsigned short *s = (unsigned short *) va_arg(args, unsigned short *);
- *s = (unsigned short) simple_strtoul(str, &next, base);
- }
- break;
- case 'l':
- if (is_sign) {
- long *l = (long *) va_arg(args,long *);
- *l = simple_strtol(str,&next,base);
- } else {
- unsigned long *l = (unsigned long*) va_arg(args,unsigned long*);
- *l = simple_strtoul(str,&next,base);
- }
- break;
- case 'L':
- if (is_sign) {
- long long *l = (long long*) va_arg(args,long long *);
- *l = simple_strtoll(str,&next,base);
- } else {
- unsigned long long *l = (unsigned long long*) va_arg(args,unsigned long long*);
- *l = simple_strtoull(str,&next,base);
- }
- break;
- case 'Z':
- case 'z':
- {
- size_t *s = (size_t*) va_arg(args,size_t*);
- *s = (size_t) simple_strtoul(str,&next,base);
- }
- break;
- default:
- if (is_sign) {
- int *i = (int *) va_arg(args, int*);
- *i = (int) simple_strtol(str,&next,base);
- } else {
- unsigned int *i = (unsigned int*) va_arg(args, unsigned int*);
- *i = (unsigned int) simple_strtoul(str,&next,base);
- }
- break;
- }
- num++;
-
- if (!next)
- break;
- str = next;
- }
- return num;
+ break;
+
+ case 'o':
+ c = CT_INT;
+ ccfn = strtouq;
+ base = 8;
+ break;
+
+ case 'u':
+ c = CT_INT;
+ ccfn = strtouq;
+ base = 10;
+ break;
+
+ case 'x':
+ flags |= PFXOK; /* enable 0x prefixing */
+ c = CT_INT;
+ ccfn = strtouq;
+ base = 16;
+ break;
+
+ case 's':
+ c = CT_STRING;
+ break;
+
+ case '[':
+ fmt = __sccl(ccltab, fmt);
+ flags |= NOSKIP;
+ c = CT_CCL;
+ break;
+
+ case 'c':
+ flags |= NOSKIP;
+ c = CT_CHAR;
+ break;
+
+ case 'p': /* pointer format is like hex */
+ flags |= POINTER | PFXOK;
+ c = CT_INT;
+ ccfn = strtouq;
+ base = 16;
+ break;
+
+ case 'n':
+ nconversions++;
+ if (flags & SUPPRESS) /* ??? */
+ continue;
+ if (flags & SHORTSHORT)
+ *va_arg(ap, char *) = nread;
+ else if (flags & SHORT)
+ *va_arg(ap, short *) = nread;
+ else if (flags & LONG)
+ *va_arg(ap, long *) = nread;
+ else if (flags & QUAD)
+ *va_arg(ap, int64_t *) = nread;
+ else
+ *va_arg(ap, int *) = nread;
+ continue;
+ }
+
+ /*
+ * We have a conversion that requires input.
+ */
+ if (inr <= 0)
+ goto input_failure;
+
+ /*
+ * Consume leading white space, except for formats
+ * that suppress this.
+ */
+ if ((flags & NOSKIP) == 0) {
+ while (isspace(*inp)) {
+ nread++;
+ if (--inr > 0)
+ inp++;
+ else
+ goto input_failure;
+ }
+ /*
+ * Note that there is at least one character in
+ * the buffer, so conversions that do not set NOSKIP
+ * can no longer result in an input failure.
+ */
+ }
+
+ /*
+ * Do the conversion.
+ */
+ switch (c) {
+
+ case CT_CHAR:
+ /* scan arbitrary characters (sets NOSKIP) */
+ if (width == 0)
+ width = 1;
+ if (flags & SUPPRESS) {
+ size_t sum = 0;
+ for (;;) {
+ if ((n = inr) < width) {
+ sum += n;
+ width -= n;
+ inp += n;
+ if (sum == 0)
+ goto input_failure;
+ break;
+ } else {
+ sum += width;
+ inr -= width;
+ inp += width;
+ break;
+ }
+ }
+ nread += sum;
+ } else {
+ memcpy(va_arg(ap, char *), inp, width);
+ inr -= width;
+ inp += width;
+ nread += width;
+ nassigned++;
+ }
+ nconversions++;
+ break;
+
+ case CT_CCL:
+ /* scan a (nonempty) character class (sets NOSKIP) */
+ if (width == 0)
+ width = (size_t)~0; /* `infinity' */
+ /* take only those things in the class */
+ if (flags & SUPPRESS) {
+ n = 0;
+ while (ccltab[(unsigned char)*inp]) {
+ n++, inr--, inp++;
+ if (--width == 0)
+ break;
+ if (inr <= 0) {
+ if (n == 0)
+ goto input_failure;
+ break;
+ }
+ }
+ if (n == 0)
+ goto match_failure;
+ } else {
+ p0 = p = va_arg(ap, char *);
+ while (ccltab[(unsigned char)*inp]) {
+ inr--;
+ *p++ = *inp++;
+ if (--width == 0)
+ break;
+ if (inr <= 0) {
+ if (p == p0)
+ goto input_failure;
+ break;
+ }
+ }
+ n = p - p0;
+ if (n == 0)
+ goto match_failure;
+ *p = 0;
+ nassigned++;
+ }
+ nread += n;
+ nconversions++;
+ break;
+
+ case CT_STRING:
+ /* like CCL, but zero-length string OK, & no NOSKIP */
+ if (width == 0)
+ width = (size_t)~0;
+ if (flags & SUPPRESS) {
+ n = 0;
+ while (!isspace(*inp)) {
+ n++, inr--, inp++;
+ if (--width == 0)
+ break;
+ if (inr <= 0)
+ break;
+ }
+ nread += n;
+ } else {
+ p0 = p = va_arg(ap, char *);
+ while (!isspace(*inp)) {
+ inr--;
+ *p++ = *inp++;
+ if (--width == 0)
+ break;
+ if (inr <= 0)
+ break;
+ }
+ *p = 0;
+ nread += p - p0;
+ nassigned++;
+ }
+ nconversions++;
+ continue;
+
+ case CT_INT:
+ /* scan an integer as if by strtoq/strtouq */
+#ifdef hardway
+ if (width == 0 || width > sizeof(buf) - 1)
+ width = sizeof(buf) - 1;
+#else
+ /* size_t is unsigned, hence this optimisation */
+ if (--width > sizeof(buf) - 2)
+ width = sizeof(buf) - 2;
+ width++;
+#endif
+ flags |= SIGNOK | NDIGITS | NZDIGITS;
+ for (p = buf; width; width--) {
+ c = *inp;
+ /*
+ * Switch on the character; `goto ok'
+ * if we accept it as a part of number.
+ */
+ switch (c) {
+
+ /*
+ * The digit 0 is always legal, but is
+ * special. For %i conversions, if no
+ * digits (zero or nonzero) have been
+ * scanned (only signs), we will have
+ * base==0. In that case, we should set
+ * it to 8 and enable 0x prefixing.
+ * Also, if we have not scanned zero digits
+ * before this, do not turn off prefixing
+ * (someone else will turn it off if we
+ * have scanned any nonzero digits).
+ */
+ case '0':
+ if (base == 0) {
+ base = 8;
+ flags |= PFXOK;
+ }
+ if (flags & NZDIGITS)
+ flags &= ~(SIGNOK|NZDIGITS|NDIGITS);
+ else
+ flags &= ~(SIGNOK|PFXOK|NDIGITS);
+ goto ok;
+
+ /* 1 through 7 always legal */
+ case '1': case '2': case '3':
+ case '4': case '5': case '6': case '7':
+ base = basefix[base];
+ flags &= ~(SIGNOK | PFXOK | NDIGITS);
+ goto ok;
+
+ /* digits 8 and 9 ok iff decimal or hex */
+ case '8': case '9':
+ base = basefix[base];
+ if (base <= 8)
+ break; /* not legal here */
+ flags &= ~(SIGNOK | PFXOK | NDIGITS);
+ goto ok;
+
+ /* letters ok iff hex */
+ case 'A': case 'B': case 'C':
+ case 'D': case 'E': case 'F':
+ case 'a': case 'b': case 'c':
+ case 'd': case 'e': case 'f':
+ /* no need to fix base here */
+ if (base <= 10)
+ break; /* not legal here */
+ flags &= ~(SIGNOK | PFXOK | NDIGITS);
+ goto ok;
+
+ /* sign ok only as first character */
+ case '+': case '-':
+ if (flags & SIGNOK) {
+ flags &= ~SIGNOK;
+ goto ok;
+ }
+ break;
+
+ /* x ok iff flag still set & 2nd char */
+ case 'x': case 'X':
+ if (flags & PFXOK && p == buf + 1) {
+ base = 16; /* if %i */
+ flags &= ~PFXOK;
+ goto ok;
+ }
+ break;
+ }
+
+ /*
+ * If we got here, c is not a legal character
+ * for a number. Stop accumulating digits.
+ */
+ break;
+ ok:
+ /*
+ * c is legal: store it and look at the next.
+ */
+ *p++ = c;
+ if (--inr > 0)
+ inp++;
+ else
+ break; /* end of input */
+ }
+ /*
+ * If we had only a sign, it is no good; push
+ * back the sign. If the number ends in `x',
+ * it was [sign] '' 'x', so push back the x
+ * and treat it as [sign] ''.
+ */
+ if (flags & NDIGITS) {
+ if (p > buf) {
+ inp--;
+ inr++;
+ }
+ goto match_failure;
+ }
+ c = ((u_char *)p)[-1];
+ if (c == 'x' || c == 'X') {
+ --p;
+ inp--;
+ inr++;
+ }
+ if ((flags & SUPPRESS) == 0) {
+ uint64_t res;
+
+ *p = 0;
+ res = (*ccfn)(buf, (char **)NULL, base);
+ if (flags & POINTER)
+ *va_arg(ap, void **) =
+ (void *)(uintptr_t)res;
+ else if (flags & SHORTSHORT)
+ *va_arg(ap, char *) = res;
+ else if (flags & SHORT)
+ *va_arg(ap, short *) = res;
+ else if (flags & LONG)
+ *va_arg(ap, long *) = res;
+ else if (flags & QUAD)
+ *va_arg(ap, int64_t *) = res;
+ else
+ *va_arg(ap, int *) = res;
+ nassigned++;
+ }
+ nread += p - buf;
+ nconversions++;
+ break;
+
+ }
+ }
+input_failure:
+ return (nconversions != 0 ? nassigned : -1);
+match_failure:
+ return (nassigned);
}
/**
projects / mini-os.git / commitdiff