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-rw-r--r--grub-core/kern/misc.c1019
1 files changed, 1019 insertions, 0 deletions
diff --git a/grub-core/kern/misc.c b/grub-core/kern/misc.c
new file mode 100644
index 0000000..1b4cdec
--- /dev/null
+++ b/grub-core/kern/misc.c
@@ -0,0 +1,1019 @@
+/* misc.c - definitions of misc functions */
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 1999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010 Free Software Foundation, Inc.
+ *
+ * GRUB 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 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GRUB 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GRUB. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <grub/misc.h>
+#include <grub/err.h>
+#include <grub/mm.h>
+#include <stdarg.h>
+#include <grub/term.h>
+#include <grub/env.h>
+#include <grub/i18n.h>
+
+static int
+grub_vsnprintf_real (char *str, grub_size_t n, const char *fmt, va_list args);
+
+static int
+grub_iswordseparator (int c)
+{
+ return (grub_isspace (c) || c == ',' || c == ';' || c == '|' || c == '&');
+}
+
+/* grub_gettext_dummy is not translating anything. */
+static const char *
+grub_gettext_dummy (const char *s)
+{
+ return s;
+}
+
+const char* (*grub_gettext) (const char *s) = grub_gettext_dummy;
+
+void *
+grub_memmove (void *dest, const void *src, grub_size_t n)
+{
+ char *d = (char *) dest;
+ const char *s = (const char *) src;
+
+ if (d < s)
+ while (n--)
+ *d++ = *s++;
+ else
+ {
+ d += n;
+ s += n;
+
+ while (n--)
+ *--d = *--s;
+ }
+
+ return dest;
+}
+
+#ifndef APPLE_CC
+void *memmove (void *dest, const void *src, grub_size_t n)
+ __attribute__ ((alias ("grub_memmove")));
+/* GCC emits references to memcpy() for struct copies etc. */
+void *memcpy (void *dest, const void *src, grub_size_t n)
+ __attribute__ ((alias ("grub_memmove")));
+#else
+void *memcpy (void *dest, const void *src, grub_size_t n)
+{
+ return grub_memmove (dest, src, n);
+}
+void *memmove (void *dest, const void *src, grub_size_t n)
+{
+ return grub_memmove (dest, src, n);
+}
+#endif
+
+char *
+grub_strcpy (char *dest, const char *src)
+{
+ char *p = dest;
+
+ while ((*p++ = *src++) != '\0')
+ ;
+
+ return dest;
+}
+
+char *
+grub_strncpy (char *dest, const char *src, int c)
+{
+ char *p = dest;
+
+ while ((*p++ = *src++) != '\0' && --c)
+ ;
+
+ return dest;
+}
+
+char *
+grub_stpcpy (char *dest, const char *src)
+{
+ char *d = dest;
+ const char *s = src;
+
+ do
+ *d++ = *s;
+ while (*s++ != '\0');
+
+ return d - 1;
+}
+
+int
+grub_printf (const char *fmt, ...)
+{
+ va_list ap;
+ int ret;
+
+ va_start (ap, fmt);
+ ret = grub_vprintf (fmt, ap);
+ va_end (ap);
+
+ return ret;
+}
+
+int
+grub_printf_ (const char *fmt, ...)
+{
+ va_list ap;
+ int ret;
+
+ va_start (ap, fmt);
+ ret = grub_vprintf (_(fmt), ap);
+ va_end (ap);
+
+ return ret;
+}
+
+int
+grub_puts_ (const char *s)
+{
+ return grub_puts (_(s));
+}
+
+#if defined (APPLE_CC) && ! defined (GRUB_UTIL)
+int
+grub_err_printf (const char *fmt, ...)
+{
+ va_list ap;
+ int ret;
+
+ va_start (ap, fmt);
+ ret = grub_vprintf (fmt, ap);
+ va_end (ap);
+
+ return ret;
+}
+#endif
+
+#if ! defined (APPLE_CC) && ! defined (GRUB_UTIL)
+int grub_err_printf (const char *fmt, ...)
+__attribute__ ((alias("grub_printf")));
+#endif
+
+void
+grub_real_dprintf (const char *file, const int line, const char *condition,
+ const char *fmt, ...)
+{
+ va_list args;
+ const char *debug = grub_env_get ("debug");
+
+ if (! debug)
+ return;
+
+ if (grub_strword (debug, "all") || grub_strword (debug, condition))
+ {
+ grub_printf ("%s:%d: ", file, line);
+ va_start (args, fmt);
+ grub_vprintf (fmt, args);
+ va_end (args);
+ grub_refresh ();
+ }
+}
+
+#define PREALLOC_SIZE 255
+
+int
+grub_vprintf (const char *fmt, va_list args)
+{
+ grub_size_t s;
+ static char buf[PREALLOC_SIZE + 1];
+ char *curbuf = buf;
+ va_list ap2;
+ va_copy (ap2, args);
+
+ s = grub_vsnprintf_real (buf, PREALLOC_SIZE, fmt, args);
+ if (s > PREALLOC_SIZE)
+ {
+ curbuf = grub_malloc (s + 1);
+ if (!curbuf)
+ {
+ grub_errno = GRUB_ERR_NONE;
+ buf[PREALLOC_SIZE - 3] = '.';
+ buf[PREALLOC_SIZE - 2] = '.';
+ buf[PREALLOC_SIZE - 1] = '.';
+ buf[PREALLOC_SIZE] = 0;
+ }
+ else
+ s = grub_vsnprintf_real (curbuf, s, fmt, ap2);
+ }
+
+ grub_xputs (curbuf);
+
+ if (curbuf != buf)
+ grub_free (curbuf);
+
+ return s;
+}
+
+int
+grub_memcmp (const void *s1, const void *s2, grub_size_t n)
+{
+ const char *t1 = s1;
+ const char *t2 = s2;
+
+ while (n--)
+ {
+ if (*t1 != *t2)
+ return (int) *t1 - (int) *t2;
+
+ t1++;
+ t2++;
+ }
+
+ return 0;
+}
+#ifndef APPLE_CC
+int memcmp (const void *s1, const void *s2, grub_size_t n)
+ __attribute__ ((alias ("grub_memcmp")));
+#else
+int memcmp (const void *s1, const void *s2, grub_size_t n)
+{
+ return grub_memcmp (s1, s2, n);
+}
+#endif
+
+int
+grub_strcmp (const char *s1, const char *s2)
+{
+ while (*s1 && *s2)
+ {
+ if (*s1 != *s2)
+ break;
+
+ s1++;
+ s2++;
+ }
+
+ return (int) *s1 - (int) *s2;
+}
+
+int
+grub_strncmp (const char *s1, const char *s2, grub_size_t n)
+{
+ if (n == 0)
+ return 0;
+
+ while (*s1 && *s2 && --n)
+ {
+ if (*s1 != *s2)
+ break;
+
+ s1++;
+ s2++;
+ }
+
+ return (int) *s1 - (int) *s2;
+}
+
+char *
+grub_strchr (const char *s, int c)
+{
+ do
+ {
+ if (*s == c)
+ return (char *) s;
+ }
+ while (*s++);
+
+ return 0;
+}
+
+char *
+grub_strrchr (const char *s, int c)
+{
+ char *p = NULL;
+
+ do
+ {
+ if (*s == c)
+ p = (char *) s;
+ }
+ while (*s++);
+
+ return p;
+}
+
+/* Copied from gnulib.
+ Written by Bruno Haible <bruno@clisp.org>, 2005. */
+char *
+grub_strstr (const char *haystack, const char *needle)
+{
+ /* Be careful not to look at the entire extent of haystack or needle
+ until needed. This is useful because of these two cases:
+ - haystack may be very long, and a match of needle found early,
+ - needle may be very long, and not even a short initial segment of
+ needle may be found in haystack. */
+ if (*needle != '\0')
+ {
+ /* Speed up the following searches of needle by caching its first
+ character. */
+ char b = *needle++;
+
+ for (;; haystack++)
+ {
+ if (*haystack == '\0')
+ /* No match. */
+ return NULL;
+ if (*haystack == b)
+ /* The first character matches. */
+ {
+ const char *rhaystack = haystack + 1;
+ const char *rneedle = needle;
+
+ for (;; rhaystack++, rneedle++)
+ {
+ if (*rneedle == '\0')
+ /* Found a match. */
+ return (char *) haystack;
+ if (*rhaystack == '\0')
+ /* No match. */
+ return NULL;
+ if (*rhaystack != *rneedle)
+ /* Nothing in this round. */
+ break;
+ }
+ }
+ }
+ }
+ else
+ return (char *) haystack;
+}
+
+int
+grub_strword (const char *haystack, const char *needle)
+{
+ const char *n_pos = needle;
+
+ while (grub_iswordseparator (*haystack))
+ haystack++;
+
+ while (*haystack)
+ {
+ /* Crawl both the needle and the haystack word we're on. */
+ while(*haystack && !grub_iswordseparator (*haystack)
+ && *haystack == *n_pos)
+ {
+ haystack++;
+ n_pos++;
+ }
+
+ /* If we reached the end of both words at the same time, the word
+ is found. If not, eat everything in the haystack that isn't the
+ next word (or the end of string) and "reset" the needle. */
+ if ( (!*haystack || grub_iswordseparator (*haystack))
+ && (!*n_pos || grub_iswordseparator (*n_pos)))
+ return 1;
+ else
+ {
+ n_pos = needle;
+ while (*haystack && !grub_iswordseparator (*haystack))
+ haystack++;
+ while (grub_iswordseparator (*haystack))
+ haystack++;
+ }
+ }
+
+ return 0;
+}
+
+int
+grub_isspace (int c)
+{
+ return (c == '\n' || c == '\r' || c == ' ' || c == '\t');
+}
+
+int
+grub_isprint (int c)
+{
+ return (c >= ' ' && c <= '~');
+}
+
+
+unsigned long
+grub_strtoul (const char *str, char **end, int base)
+{
+ unsigned long long num;
+
+ num = grub_strtoull (str, end, base);
+ if (num > ~0UL)
+ {
+ grub_error (GRUB_ERR_OUT_OF_RANGE, "overflow is detected");
+ return ~0UL;
+ }
+
+ return (unsigned long) num;
+}
+
+unsigned long long
+grub_strtoull (const char *str, char **end, int base)
+{
+ unsigned long long num = 0;
+ int found = 0;
+
+ /* Skip white spaces. */
+ while (*str && grub_isspace (*str))
+ str++;
+
+ /* Guess the base, if not specified. The prefix `0x' means 16, and
+ the prefix `0' means 8. */
+ if (str[0] == '0')
+ {
+ if (str[1] == 'x')
+ {
+ if (base == 0 || base == 16)
+ {
+ base = 16;
+ str += 2;
+ }
+ }
+ else if (base == 0 && str[1] >= '0' && str[1] <= '7')
+ base = 8;
+ }
+
+ if (base == 0)
+ base = 10;
+
+ while (*str)
+ {
+ unsigned long digit;
+
+ digit = grub_tolower (*str) - '0';
+ if (digit > 9)
+ {
+ digit += '0' - 'a' + 10;
+ if (digit >= (unsigned long) base)
+ break;
+ }
+
+ found = 1;
+
+ /* NUM * BASE + DIGIT > ~0ULL */
+ if (num > grub_divmod64 (~0ULL - digit, base, 0))
+ {
+ grub_error (GRUB_ERR_OUT_OF_RANGE, "overflow is detected");
+ return ~0ULL;
+ }
+
+ num = num * base + digit;
+ str++;
+ }
+
+ if (! found)
+ {
+ grub_error (GRUB_ERR_BAD_NUMBER, "unrecognized number");
+ return 0;
+ }
+
+ if (end)
+ *end = (char *) str;
+
+ return num;
+}
+
+char *
+grub_strdup (const char *s)
+{
+ grub_size_t len;
+ char *p;
+
+ len = grub_strlen (s) + 1;
+ p = (char *) grub_malloc (len);
+ if (! p)
+ return 0;
+
+ return grub_memcpy (p, s, len);
+}
+
+char *
+grub_strndup (const char *s, grub_size_t n)
+{
+ grub_size_t len;
+ char *p;
+
+ len = grub_strlen (s);
+ if (len > n)
+ len = n;
+ p = (char *) grub_malloc (len + 1);
+ if (! p)
+ return 0;
+
+ grub_memcpy (p, s, len);
+ p[len] = '\0';
+ return p;
+}
+
+void *
+grub_memset (void *s, int c, grub_size_t len)
+{
+ void *p = s;
+ grub_uint8_t pattern8 = c;
+
+ if (len >= 3 * sizeof (unsigned long))
+ {
+ unsigned long patternl = 0;
+ grub_size_t i;
+
+ for (i = 0; i < sizeof (unsigned long); i++)
+ patternl |= ((unsigned long) pattern8) << (8 * i);
+
+ while (len > 0 && (((grub_addr_t) p) & (sizeof (unsigned long) - 1)))
+ {
+ *(grub_uint8_t *) p = pattern8;
+ p = (grub_uint8_t *) p + 1;
+ len--;
+ }
+ while (len >= sizeof (unsigned long))
+ {
+ *(unsigned long *) p = patternl;
+ p = (unsigned long *) p + 1;
+ len -= sizeof (unsigned long);
+ }
+ }
+
+ while (len > 0)
+ {
+ *(grub_uint8_t *) p = pattern8;
+ p = (grub_uint8_t *) p + 1;
+ len--;
+ }
+
+ return s;
+}
+#ifndef APPLE_CC
+void *memset (void *s, int c, grub_size_t n)
+ __attribute__ ((alias ("grub_memset")));
+#else
+void *memset (void *s, int c, grub_size_t n)
+{
+ return grub_memset (s, c, n);
+}
+#endif
+
+grub_size_t
+grub_strlen (const char *s)
+{
+ const char *p = s;
+
+ while (*p)
+ p++;
+
+ return p - s;
+}
+
+static inline void
+grub_reverse (char *str)
+{
+ char *p = str + grub_strlen (str) - 1;
+
+ while (str < p)
+ {
+ char tmp;
+
+ tmp = *str;
+ *str = *p;
+ *p = tmp;
+ str++;
+ p--;
+ }
+}
+
+/* Divide N by D, return the quotient, and store the remainder in *R. */
+grub_uint64_t
+grub_divmod64_full (grub_uint64_t n, grub_uint64_t d, grub_uint64_t *r)
+{
+ /* This algorithm is typically implemented by hardware. The idea
+ is to get the highest bit in N, 64 times, by keeping
+ upper(N * 2^i) = (Q * D + M), where upper
+ represents the high 64 bits in 128-bits space. */
+ unsigned bits = 64;
+ grub_uint64_t q = 0;
+ grub_uint64_t m = 0;
+
+ /* Skip the slow computation if 32-bit arithmetic is possible. */
+ if (n < 0xffffffff && d < 0xffffffff)
+ {
+ if (r)
+ *r = ((grub_uint32_t) n) % (grub_uint32_t) d;
+
+ return ((grub_uint32_t) n) / (grub_uint32_t) d;
+ }
+
+ while (bits--)
+ {
+ m <<= 1;
+
+ if (n & (1ULL << 63))
+ m |= 1;
+
+ q <<= 1;
+ n <<= 1;
+
+ if (m >= d)
+ {
+ q |= 1;
+ m -= d;
+ }
+ }
+
+ if (r)
+ *r = m;
+
+ return q;
+}
+
+/* Convert a long long value to a string. This function avoids 64-bit
+ modular arithmetic or divisions. */
+static char *
+grub_lltoa (char *str, int c, unsigned long long n)
+{
+ unsigned base = (c == 'x') ? 16 : 10;
+ char *p;
+
+ if ((long long) n < 0 && c == 'd')
+ {
+ n = (unsigned long long) (-((long long) n));
+ *str++ = '-';
+ }
+
+ p = str;
+
+ if (base == 16)
+ do
+ {
+ unsigned d = (unsigned) (n & 0xf);
+ *p++ = (d > 9) ? d + 'a' - 10 : d + '0';
+ }
+ while (n >>= 4);
+ else
+ /* BASE == 10 */
+ do
+ {
+ unsigned m;
+
+ n = grub_divmod64 (n, 10, &m);
+ *p++ = m + '0';
+ }
+ while (n);
+
+ *p = 0;
+
+ grub_reverse (str);
+ return p;
+}
+
+static int
+grub_vsnprintf_real (char *str, grub_size_t max_len, const char *fmt, va_list args)
+{
+ char c;
+ grub_size_t count = 0;
+ auto void write_char (unsigned char ch);
+ auto void write_str (const char *s);
+ auto void write_fill (const char ch, int n);
+
+ void write_char (unsigned char ch)
+ {
+ if (count < max_len)
+ *str++ = ch;
+
+ count++;
+ }
+
+ void write_str (const char *s)
+ {
+ while (*s)
+ write_char (*s++);
+ }
+
+ void write_fill (const char ch, int n)
+ {
+ int i;
+ for (i = 0; i < n; i++)
+ write_char (ch);
+ }
+
+ while ((c = *fmt++) != 0)
+ {
+ if (c != '%')
+ write_char (c);
+ else
+ {
+ char tmp[32];
+ char *p;
+ unsigned int format1 = 0;
+ unsigned int format2 = ~ 0U;
+ char zerofill = ' ';
+ int rightfill = 0;
+ int n;
+ int longfmt = 0;
+ int longlongfmt = 0;
+ int unsig = 0;
+
+ if (*fmt && *fmt =='-')
+ {
+ rightfill = 1;
+ fmt++;
+ }
+
+ p = (char *) fmt;
+ /* Read formatting parameters. */
+ while (*p && grub_isdigit (*p))
+ p++;
+
+ if (p > fmt)
+ {
+ char s[p - fmt + 1];
+ grub_strncpy (s, fmt, p - fmt);
+ s[p - fmt] = 0;
+ if (s[0] == '0')
+ zerofill = '0';
+ format1 = grub_strtoul (s, 0, 10);
+ fmt = p;
+ }
+
+ if (*p && *p == '.')
+ {
+ p++;
+ fmt++;
+ while (*p && grub_isdigit (*p))
+ p++;
+
+ if (p > fmt)
+ {
+ char fstr[p - fmt + 1];
+ grub_strncpy (fstr, fmt, p - fmt);
+ fstr[p - fmt] = 0;
+ format2 = grub_strtoul (fstr, 0, 10);
+ fmt = p;
+ }
+ }
+
+ c = *fmt++;
+ if (c == 'l')
+ {
+ longfmt = 1;
+ c = *fmt++;
+ if (c == 'l')
+ {
+ longlongfmt = 1;
+ c = *fmt++;
+ }
+ }
+
+ switch (c)
+ {
+ case 'p':
+ write_str ("0x");
+ c = 'x';
+ longlongfmt |= (sizeof (void *) == sizeof (long long));
+ /* Fall through. */
+ case 'x':
+ case 'u':
+ unsig = 1;
+ /* Fall through. */
+ case 'd':
+ if (longlongfmt)
+ {
+ long long ll;
+
+ ll = va_arg (args, long long);
+ grub_lltoa (tmp, c, ll);
+ }
+ else if (longfmt && unsig)
+ {
+ unsigned long l = va_arg (args, unsigned long);
+ grub_lltoa (tmp, c, l);
+ }
+ else if (longfmt)
+ {
+ long l = va_arg (args, long);
+ grub_lltoa (tmp, c, l);
+ }
+ else if (unsig)
+ {
+ unsigned u = va_arg (args, unsigned);
+ grub_lltoa (tmp, c, u);
+ }
+ else
+ {
+ n = va_arg (args, int);
+ grub_lltoa (tmp, c, n);
+ }
+ if (! rightfill && grub_strlen (tmp) < format1)
+ write_fill (zerofill, format1 - grub_strlen (tmp));
+ write_str (tmp);
+ if (rightfill && grub_strlen (tmp) < format1)
+ write_fill (zerofill, format1 - grub_strlen (tmp));
+ break;
+
+ case 'c':
+ n = va_arg (args, int);
+ write_char (n & 0xff);
+ break;
+
+ case 'C':
+ {
+ grub_uint32_t code = va_arg (args, grub_uint32_t);
+ int shift;
+ unsigned mask;
+
+ if (code <= 0x7f)
+ {
+ shift = 0;
+ mask = 0;
+ }
+ else if (code <= 0x7ff)
+ {
+ shift = 6;
+ mask = 0xc0;
+ }
+ else if (code <= 0xffff)
+ {
+ shift = 12;
+ mask = 0xe0;
+ }
+ else if (code <= 0x1fffff)
+ {
+ shift = 18;
+ mask = 0xf0;
+ }
+ else if (code <= 0x3ffffff)
+ {
+ shift = 24;
+ mask = 0xf8;
+ }
+ else if (code <= 0x7fffffff)
+ {
+ shift = 30;
+ mask = 0xfc;
+ }
+ else
+ {
+ code = '?';
+ shift = 0;
+ mask = 0;
+ }
+
+ write_char (mask | (code >> shift));
+
+ for (shift -= 6; shift >= 0; shift -= 6)
+ write_char (0x80 | (0x3f & (code >> shift)));
+ }
+ break;
+
+ case 's':
+ p = va_arg (args, char *);
+ if (p)
+ {
+ grub_size_t len = 0;
+ while (len < format2 && p[len])
+ len++;
+
+ if (!rightfill && len < format1)
+ write_fill (zerofill, format1 - len);
+
+ grub_size_t i;
+ for (i = 0; i < len; i++)
+ write_char (*p++);
+
+ if (rightfill && len < format1)
+ write_fill (zerofill, format1 - len);
+ }
+ else
+ write_str ("(null)");
+
+ break;
+
+ default:
+ write_char (c);
+ break;
+ }
+ }
+ }
+
+ *str = '\0';
+
+ return count;
+}
+
+int
+grub_vsnprintf (char *str, grub_size_t n, const char *fmt, va_list ap)
+{
+ grub_size_t ret;
+
+ if (!n)
+ return 0;
+
+ n--;
+
+ ret = grub_vsnprintf_real (str, n, fmt, ap);
+
+ return ret < n ? ret : n;
+}
+
+int
+grub_snprintf (char *str, grub_size_t n, const char *fmt, ...)
+{
+ va_list ap;
+ int ret;
+
+ va_start (ap, fmt);
+ ret = grub_vsnprintf (str, n, fmt, ap);
+ va_end (ap);
+
+ return ret;
+}
+
+char *
+grub_xvasprintf (const char *fmt, va_list ap)
+{
+ grub_size_t s, as = PREALLOC_SIZE;
+ char *ret;
+
+ while (1)
+ {
+ va_list ap2;
+ va_copy (ap2, ap);
+ ret = grub_malloc (as + 1);
+ if (!ret)
+ return NULL;
+
+ s = grub_vsnprintf_real (ret, as, fmt, ap2);
+ if (s <= as)
+ return ret;
+
+ grub_free (ret);
+ as = s;
+ }
+}
+
+char *
+grub_xasprintf (const char *fmt, ...)
+{
+ va_list ap;
+ char *ret;
+
+ va_start (ap, fmt);
+ ret = grub_xvasprintf (fmt, ap);
+ va_end (ap);
+
+ return ret;
+}
+
+/* Abort GRUB. This function does not return. */
+void
+grub_abort (void)
+{
+ grub_printf ("\nAborted.");
+
+#ifndef GRUB_UTIL
+ if (grub_term_inputs)
+#endif
+ {
+ grub_printf (" Press any key to exit.");
+ grub_getkey ();
+ }
+
+ grub_exit ();
+}
+
+#if ! defined (APPLE_CC) && !defined (GRUB_UTIL)
+/* GCC emits references to abort(). */
+void abort (void) __attribute__ ((alias ("grub_abort")));
+#endif
+
+#if NEED_ENABLE_EXECUTE_STACK && !defined(GRUB_UTIL) && !defined(GRUB_MACHINE_EMU)
+/* Some gcc versions generate a call to this function
+ in trampolines for nested functions. */
+void __enable_execute_stack (void *addr __attribute__ ((unused)))
+{
+}
+#endif
+
+#if NEED_REGISTER_FRAME_INFO && !defined(GRUB_UTIL)
+void __register_frame_info (void)
+{
+}
+
+void __deregister_frame_info (void)
+{
+}
+#endif
+