grub-lakitu/include/grub/misc.h - cos/cobble - Git at Google

 /* misc.h - prototypes for misc functions */
 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 2002,2003,2005,2006,2007,2008,2009,2010  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/>.
  */

 #ifndef GRUB_MISC_HEADER
 #define GRUB_MISC_HEADER	1

 #include <stdarg.h>
 #include <grub/types.h>
 #include <grub/symbol.h>
 #include <grub/err.h>
 #include <grub/i18n.h>
 #include <grub/compiler.h>

 #define ALIGN_UP(addr, align) \
 	((addr + (typeof (addr)) align - 1) & ~((typeof (addr)) align - 1))
 #define ALIGN_UP_OVERHEAD(addr, align) ((-(addr)) & ((typeof (addr)) (align) - 1))
 #define ALIGN_DOWN(addr, align) \
 	((addr) & ~((typeof (addr)) align - 1))
 #define ARRAY_SIZE(array) (sizeof (array) / sizeof (array[0]))
 #define COMPILE_TIME_ASSERT(cond) switch (0) { case 1: case !(cond): ; }

 #define grub_dprintf(condition, ...) grub_real_dprintf(GRUB_FILE, __LINE__, condition, __VA_ARGS__)

 void *EXPORT_FUNC(grub_memmove) (void *dest, const void *src, grub_size_t n);
 char *EXPORT_FUNC(grub_strcpy) (char *dest, const char *src);

 static inline char *
 grub_strncpy (char *dest, const char *src, int c)
 {
   char *p = dest;

   while ((*p++ = *src++) != '\0' && --c)
     ;

   return dest;
 }

 static inline char *
 grub_stpcpy (char *dest, const char *src)
 {
   char *d = dest;
   const char *s = src;

   do
     *d++ = *s;
   while (*s++ != '\0');

   return d - 1;
 }

 /* XXX: If grub_memmove is too slow, we must implement grub_memcpy.  */
 static inline void *
 grub_memcpy (void *dest, const void *src, grub_size_t n)
 {
   return grub_memmove (dest, src, n);
 }

 #if defined(__x86_64__) && !defined (GRUB_UTIL)
 #if defined (__MINGW32__) || defined (__CYGWIN__) || defined (__MINGW64__)
 #define GRUB_ASM_ATTR __attribute__ ((sysv_abi))
 #else
 #define GRUB_ASM_ATTR
 #endif
 #endif

 int EXPORT_FUNC(grub_memcmp) (const void *s1, const void *s2, grub_size_t n);
 int EXPORT_FUNC(grub_strcmp) (const char *s1, const char *s2);
 int EXPORT_FUNC(grub_strncmp) (const char *s1, const char *s2, grub_size_t n);

 char *EXPORT_FUNC(grub_strchr) (const char *s, int c);
 char *EXPORT_FUNC(grub_strrchr) (const char *s, int c);
 int EXPORT_FUNC(grub_strword) (const char *s, const char *w);

 /* Copied from gnulib.
    Written by Bruno Haible <bruno@clisp.org>, 2005. */
 static inline 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 0;
 	  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 0;
 		  if (*rhaystack != *rneedle)
 		    /* Nothing in this round.  */
 		    break;
 		}
 	    }
 	}
     }
   else
     return (char *) haystack;
 }

 int EXPORT_FUNC(grub_isspace) (int c);

 static inline int
 grub_isprint (int c)
 {
   return (c >= ' ' && c <= '~');
 }

 static inline int
 grub_iscntrl (int c)
 {
   return (c >= 0x00 && c <= 0x1F) || c == 0x7F;
 }

 static inline int
 grub_isalpha (int c)
 {
   return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
 }

 static inline int
 grub_islower (int c)
 {
   return (c >= 'a' && c <= 'z');
 }

 static inline int
 grub_isupper (int c)
 {
   return (c >= 'A' && c <= 'Z');
 }

 static inline int
 grub_isgraph (int c)
 {
   return (c >= '!' && c <= '~');
 }

 static inline int
 grub_isdigit (int c)
 {
   return (c >= '0' && c <= '9');
 }

 static inline int
 grub_isxdigit (int c)
 {
   return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F');
 }

 static inline int
 grub_isalnum (int c)
 {
   return grub_isalpha (c) || grub_isdigit (c);
 }

 static inline int
 grub_tolower (int c)
 {
   if (c >= 'A' && c <= 'Z')
     return c - 'A' + 'a';

   return c;
 }

 static inline int
 grub_toupper (int c)
 {
   if (c >= 'a' && c <= 'z')
     return c - 'a' + 'A';

   return c;
 }

 static inline int
 grub_strcasecmp (const char *s1, const char *s2)
 {
   while (*s1 && *s2)
     {
       if (grub_tolower ((grub_uint8_t) *s1)
 	  != grub_tolower ((grub_uint8_t) *s2))
 	break;

       s1++;
       s2++;
     }

   return (int) grub_tolower ((grub_uint8_t) *s1)
     - (int) grub_tolower ((grub_uint8_t) *s2);
 }

 static inline int
 grub_strncasecmp (const char *s1, const char *s2, grub_size_t n)
 {
   if (n == 0)
     return 0;

   while (*s1 && *s2 && --n)
     {
       if (grub_tolower (*s1) != grub_tolower (*s2))
 	break;

       s1++;
       s2++;
     }

   return (int) grub_tolower ((grub_uint8_t) *s1)
     - (int) grub_tolower ((grub_uint8_t) *s2);
 }

 unsigned long EXPORT_FUNC(grub_strtoul) (const char *str, char **end, int base);
 unsigned long long EXPORT_FUNC(grub_strtoull) (const char *str, char **end, int base);

 static inline long
 grub_strtol (const char *str, char **end, int base)
 {
   int negative = 0;
   unsigned long long magnitude;

   while (*str && grub_isspace (*str))
     str++;

   if (*str == '-')
     {
       negative = 1;
       str++;
     }

   magnitude = grub_strtoull (str, end, base);
   if (negative)
     {
       if (magnitude > (unsigned long) GRUB_LONG_MAX + 1)
         {
           grub_error (GRUB_ERR_OUT_OF_RANGE, N_("overflow is detected"));
           return GRUB_LONG_MIN;
         }
       return -((long) magnitude);
     }
   else
     {
       if (magnitude > GRUB_LONG_MAX)
         {
           grub_error (GRUB_ERR_OUT_OF_RANGE, N_("overflow is detected"));
           return GRUB_LONG_MAX;
         }
       return (long) magnitude;
     }
 }

 char *EXPORT_FUNC(grub_strdup) (const char *s) WARN_UNUSED_RESULT;
 char *EXPORT_FUNC(grub_strndup) (const char *s, grub_size_t n) WARN_UNUSED_RESULT;
 void *EXPORT_FUNC(grub_memset) (void *s, int c, grub_size_t n);
 grub_size_t EXPORT_FUNC(grub_strlen) (const char *s) WARN_UNUSED_RESULT;
 int EXPORT_FUNC(grub_printf) (const char *fmt, ...) __attribute__ ((format (GNU_PRINTF, 1, 2)));
 int EXPORT_FUNC(grub_printf_) (const char *fmt, ...) __attribute__ ((format (GNU_PRINTF, 1, 2)));

 /* Replace all `ch' characters of `input' with `with' and copy the
    result into `output'; return EOS address of `output'. */
 static inline char *
 grub_strchrsub (char *output, const char *input, char ch, const char *with)
 {
   while (*input)
     {
       if (*input == ch)
 	{
 	  grub_strcpy (output, with);
 	  output += grub_strlen (with);
 	  input++;
 	  continue;
 	}
       *output++ = *input++;
     }
   *output = '\0';
   return output;
 }

 extern void (*EXPORT_VAR (grub_xputs)) (const char *str);

 static inline int
 grub_puts (const char *s)
 {
   const char nl[2] = "\n";
   grub_xputs (s);
   grub_xputs (nl);

   return 1;	/* Cannot fail.  */
 }

 int EXPORT_FUNC(grub_puts_) (const char *s);
 void EXPORT_FUNC(grub_real_dprintf) (const char *file,
                                      const int line,
                                      const char *condition,
                                      const char *fmt, ...) __attribute__ ((format (GNU_PRINTF, 4, 5)));
 int EXPORT_FUNC(grub_vprintf) (const char *fmt, va_list args);
 int EXPORT_FUNC(grub_snprintf) (char *str, grub_size_t n, const char *fmt, ...)
      __attribute__ ((format (GNU_PRINTF, 3, 4)));
 int EXPORT_FUNC(grub_vsnprintf) (char *str, grub_size_t n, const char *fmt,
 				 va_list args);
 char *EXPORT_FUNC(grub_xasprintf) (const char *fmt, ...)
      __attribute__ ((format (GNU_PRINTF, 1, 2))) WARN_UNUSED_RESULT;
 char *EXPORT_FUNC(grub_xvasprintf) (const char *fmt, va_list args) WARN_UNUSED_RESULT;
 void EXPORT_FUNC(grub_exit) (void) __attribute__ ((noreturn));
 grub_uint64_t EXPORT_FUNC(grub_divmod64) (grub_uint64_t n,
 					  grub_uint64_t d,
 					  grub_uint64_t *r);

 /* Must match softdiv group in gentpl.py.  */
 #if !defined(GRUB_MACHINE_EMU) && (defined(__arm__) || defined(__ia64__))
 #define GRUB_DIVISION_IN_SOFTWARE 1
 #else
 #define GRUB_DIVISION_IN_SOFTWARE 0
 #endif

 /* Some division functions need to be in kernel if compiler generates calls
    to them. Otherwise we still need them for consistent tests but they go
    into a separate module.  */
 #if GRUB_DIVISION_IN_SOFTWARE
 #define EXPORT_FUNC_IF_SOFTDIV EXPORT_FUNC
 #else
 #define EXPORT_FUNC_IF_SOFTDIV(x) x
 #endif

 grub_int64_t
 EXPORT_FUNC_IF_SOFTDIV(grub_divmod64s) (grub_int64_t n,
 					grub_int64_t d,
 					grub_int64_t *r);

 grub_uint32_t
 EXPORT_FUNC_IF_SOFTDIV (grub_divmod32) (grub_uint32_t n,
 					grub_uint32_t d,
 					grub_uint32_t *r);

 grub_int32_t
 EXPORT_FUNC_IF_SOFTDIV (grub_divmod32s) (grub_int32_t n,
 					 grub_int32_t d,
 					 grub_int32_t *r);

 /* Inline functions.  */

 static inline char *
 grub_memchr (const void *p, int c, grub_size_t len)
 {
   const char *s = (const char *) p;
   const char *e = s + len;

   for (; s < e; s++)
     if (*s == c)
       return (char *) s;

   return 0;
 }


 static inline unsigned int
 grub_abs (int x)
 {
   if (x < 0)
     return (unsigned int) (-x);
   else
     return (unsigned int) x;
 }

 /* Reboot the machine.  */
 #if defined (GRUB_MACHINE_EMU) || defined (GRUB_MACHINE_QEMU_MIPS)
 void EXPORT_FUNC(grub_reboot) (void) __attribute__ ((noreturn));
 #else
 void grub_reboot (void) __attribute__ ((noreturn));
 #endif

 #if defined (__clang__) && !defined (GRUB_UTIL)
 void __attribute__ ((noreturn)) EXPORT_FUNC (abort) (void);
 #endif

 #ifdef GRUB_MACHINE_PCBIOS
 /* Halt the system, using APM if possible. If NO_APM is true, don't
  * use APM even if it is available.  */
 void grub_halt (int no_apm) __attribute__ ((noreturn));
 #elif defined (__mips__) && !defined (GRUB_MACHINE_EMU)
 void EXPORT_FUNC (grub_halt) (void) __attribute__ ((noreturn));
 #else
 void grub_halt (void) __attribute__ ((noreturn));
 #endif

 #ifdef GRUB_MACHINE_EMU
 /* Flag to check if module loading is available.  */
 extern const int EXPORT_VAR(grub_no_modules);
 #else
 #define grub_no_modules 0
 #endif

 static inline void
 grub_error_save (struct grub_error_saved *save)
 {
   grub_memcpy (save->errmsg, grub_errmsg, sizeof (save->errmsg));
   save->grub_errno = grub_errno;
   grub_errno = GRUB_ERR_NONE;
 }

 static inline void
 grub_error_load (const struct grub_error_saved *save)
 {
   grub_memcpy (grub_errmsg, save->errmsg, sizeof (grub_errmsg));
   grub_errno = save->grub_errno;
 }

 #if BOOT_TIME_STATS
 struct grub_boot_time
 {
   struct grub_boot_time *next;
   grub_uint64_t tp;
   const char *file;
   int line;
   char *msg;
 };

 extern struct grub_boot_time *EXPORT_VAR(grub_boot_time_head);

 void EXPORT_FUNC(grub_real_boot_time) (const char *file,
 				       const int line,
 				       const char *fmt, ...) __attribute__ ((format (GNU_PRINTF, 3, 4)));
 #define grub_boot_time(...) grub_real_boot_time(GRUB_FILE, __LINE__, __VA_ARGS__)
 #else
 #define grub_boot_time(...)
 #endif

 #define grub_max(a, b) (((a) > (b)) ? (a) : (b))
 #define grub_min(a, b) (((a) < (b)) ? (a) : (b))

 #endif /* ! GRUB_MISC_HEADER */
	/* misc.h - prototypes for misc functions */
	/*
	* GRUB -- GRand Unified Bootloader
	* Copyright (C) 2002,2003,2005,2006,2007,2008,2009,2010 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/>.
	*/

	#ifndef GRUB_MISC_HEADER
	#define GRUB_MISC_HEADER 1

	#include <stdarg.h>
	#include <grub/types.h>
	#include <grub/symbol.h>
	#include <grub/err.h>
	#include <grub/i18n.h>
	#include <grub/compiler.h>

	#define ALIGN_UP(addr, align) \
	((addr + (typeof (addr)) align - 1) & ~((typeof (addr)) align - 1))
	#define ALIGN_UP_OVERHEAD(addr, align) ((-(addr)) & ((typeof (addr)) (align) - 1))
	#define ALIGN_DOWN(addr, align) \
	((addr) & ~((typeof (addr)) align - 1))
	#define ARRAY_SIZE(array) (sizeof (array) / sizeof (array[0]))
	#define COMPILE_TIME_ASSERT(cond) switch (0) { case 1: case !(cond): ; }

	#define grub_dprintf(condition, ...) grub_real_dprintf(GRUB_FILE, __LINE__, condition, __VA_ARGS__)

	void EXPORT_FUNC(grub_memmove) (void dest, const void *src, grub_size_t n);
	char EXPORT_FUNC(grub_strcpy) (char dest, const char *src);

	static inline char *
	grub_strncpy (char dest, const char src, int c)
	{
	char *p = dest;

	while ((p++ = src++) != '\0' && --c)
	;

	return dest;
	}

	static inline char *
	grub_stpcpy (char dest, const char src)
	{
	char *d = dest;
	const char *s = src;

	do
	d++ = s;
	while (*s++ != '\0');

	return d - 1;
	}

	/* XXX: If grub_memmove is too slow, we must implement grub_memcpy. */
	static inline void *
	grub_memcpy (void dest, const void src, grub_size_t n)
	{
	return grub_memmove (dest, src, n);
	}

	#if defined(__x86_64__) && !defined (GRUB_UTIL)
	#if defined (__MINGW32__) \|\| defined (__CYGWIN__) \|\| defined (__MINGW64__)
	#define GRUB_ASM_ATTR __attribute__ ((sysv_abi))
	#else
	#define GRUB_ASM_ATTR
	#endif
	#endif

	int EXPORT_FUNC(grub_memcmp) (const void s1, const void s2, grub_size_t n);
	int EXPORT_FUNC(grub_strcmp) (const char s1, const char s2);
	int EXPORT_FUNC(grub_strncmp) (const char s1, const char s2, grub_size_t n);

	char EXPORT_FUNC(grub_strchr) (const char s, int c);
	char EXPORT_FUNC(grub_strrchr) (const char s, int c);
	int EXPORT_FUNC(grub_strword) (const char s, const char w);

	/* Copied from gnulib.
	Written by Bruno Haible <bruno@clisp.org>, 2005. */
	static inline 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 0;
	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 0;
	if (rhaystack != rneedle)
	/* Nothing in this round. */
	break;
	}
	}
	}
	}
	else
	return (char *) haystack;
	}

	int EXPORT_FUNC(grub_isspace) (int c);

	static inline int
	grub_isprint (int c)
	{
	return (c >= ' ' && c <= '~');
	}

	static inline int
	grub_iscntrl (int c)
	{
	return (c >= 0x00 && c <= 0x1F) \|\| c == 0x7F;
	}

	static inline int
	grub_isalpha (int c)
	{
	return (c >= 'a' && c <= 'z') \|\| (c >= 'A' && c <= 'Z');
	}

	static inline int
	grub_islower (int c)
	{
	return (c >= 'a' && c <= 'z');
	}

	static inline int
	grub_isupper (int c)
	{
	return (c >= 'A' && c <= 'Z');
	}

	static inline int
	grub_isgraph (int c)
	{
	return (c >= '!' && c <= '~');
	}

	static inline int
	grub_isdigit (int c)
	{
	return (c >= '0' && c <= '9');
	}

	static inline int
	grub_isxdigit (int c)
	{
	return (c >= '0' && c <= '9') \|\| (c >= 'a' && c <= 'f') \|\| (c >= 'A' && c <= 'F');
	}

	static inline int
	grub_isalnum (int c)
	{
	return grub_isalpha (c) \|\| grub_isdigit (c);
	}

	static inline int
	grub_tolower (int c)
	{
	if (c >= 'A' && c <= 'Z')
	return c - 'A' + 'a';

	return c;
	}

	static inline int
	grub_toupper (int c)
	{
	if (c >= 'a' && c <= 'z')
	return c - 'a' + 'A';

	return c;
	}

	static inline int
	grub_strcasecmp (const char s1, const char s2)
	{
	while (s1 && s2)
	{
	if (grub_tolower ((grub_uint8_t) *s1)
	!= grub_tolower ((grub_uint8_t) *s2))
	break;

	s1++;
	s2++;
	}

	return (int) grub_tolower ((grub_uint8_t) *s1)
	- (int) grub_tolower ((grub_uint8_t) *s2);
	}

	static inline int
	grub_strncasecmp (const char s1, const char s2, grub_size_t n)
	{
	if (n == 0)
	return 0;

	while (s1 && s2 && --n)
	{
	if (grub_tolower (s1) != grub_tolower (s2))
	break;

	s1++;
	s2++;
	}

	return (int) grub_tolower ((grub_uint8_t) *s1)
	- (int) grub_tolower ((grub_uint8_t) *s2);
	}

	unsigned long EXPORT_FUNC(grub_strtoul) (const char str, char *end, int base);
	unsigned long long EXPORT_FUNC(grub_strtoull) (const char str, char *end, int base);

	static inline long
	grub_strtol (const char str, char *end, int base)
	{
	int negative = 0;
	unsigned long long magnitude;

	while (str && grub_isspace (str))
	str++;

	if (*str == '-')
	{
	negative = 1;
	str++;
	}

	magnitude = grub_strtoull (str, end, base);
	if (negative)
	{
	if (magnitude > (unsigned long) GRUB_LONG_MAX + 1)
	{
	grub_error (GRUB_ERR_OUT_OF_RANGE, N_("overflow is detected"));
	return GRUB_LONG_MIN;
	}
	return -((long) magnitude);
	}
	else
	{
	if (magnitude > GRUB_LONG_MAX)
	{
	grub_error (GRUB_ERR_OUT_OF_RANGE, N_("overflow is detected"));
	return GRUB_LONG_MAX;
	}
	return (long) magnitude;
	}
	}

	char EXPORT_FUNC(grub_strdup) (const char s) WARN_UNUSED_RESULT;
	char EXPORT_FUNC(grub_strndup) (const char s, grub_size_t n) WARN_UNUSED_RESULT;
	void EXPORT_FUNC(grub_memset) (void s, int c, grub_size_t n);
	grub_size_t EXPORT_FUNC(grub_strlen) (const char *s) WARN_UNUSED_RESULT;
	int EXPORT_FUNC(grub_printf) (const char *fmt, ...) __attribute__ ((format (GNU_PRINTF, 1, 2)));
	int EXPORT_FUNC(grub_printf_) (const char *fmt, ...) __attribute__ ((format (GNU_PRINTF, 1, 2)));

	/* Replace all `ch' characters of `input' with `with' and copy the
	result into `output'; return EOS address of `output'. */
	static inline char *
	grub_strchrsub (char output, const char input, char ch, const char *with)
	{
	while (*input)
	{
	if (*input == ch)
	{
	grub_strcpy (output, with);
	output += grub_strlen (with);
	input++;
	continue;
	}
	output++ = input++;
	}
	*output = '\0';
	return output;
	}

	extern void (EXPORT_VAR (grub_xputs)) (const char str);

	static inline int
	grub_puts (const char *s)
	{
	const char nl[2] = "\n";
	grub_xputs (s);
	grub_xputs (nl);

	return 1; /* Cannot fail. */
	}

	int EXPORT_FUNC(grub_puts_) (const char *s);
	void EXPORT_FUNC(grub_real_dprintf) (const char *file,
	const int line,
	const char *condition,
	const char *fmt, ...) __attribute__ ((format (GNU_PRINTF, 4, 5)));
	int EXPORT_FUNC(grub_vprintf) (const char *fmt, va_list args);
	int EXPORT_FUNC(grub_snprintf) (char str, grub_size_t n, const char fmt, ...)
	__attribute__ ((format (GNU_PRINTF, 3, 4)));
	int EXPORT_FUNC(grub_vsnprintf) (char str, grub_size_t n, const char fmt,
	va_list args);
	char EXPORT_FUNC(grub_xasprintf) (const char fmt, ...)
	__attribute__ ((format (GNU_PRINTF, 1, 2))) WARN_UNUSED_RESULT;
	char EXPORT_FUNC(grub_xvasprintf) (const char fmt, va_list args) WARN_UNUSED_RESULT;
	void EXPORT_FUNC(grub_exit) (void) __attribute__ ((noreturn));
	grub_uint64_t EXPORT_FUNC(grub_divmod64) (grub_uint64_t n,
	grub_uint64_t d,
	grub_uint64_t *r);

	/* Must match softdiv group in gentpl.py. */
	#if !defined(GRUB_MACHINE_EMU) && (defined(__arm__) \|\| defined(__ia64__))
	#define GRUB_DIVISION_IN_SOFTWARE 1
	#else
	#define GRUB_DIVISION_IN_SOFTWARE 0
	#endif

	/* Some division functions need to be in kernel if compiler generates calls
	to them. Otherwise we still need them for consistent tests but they go
	into a separate module. */
	#if GRUB_DIVISION_IN_SOFTWARE
	#define EXPORT_FUNC_IF_SOFTDIV EXPORT_FUNC
	#else
	#define EXPORT_FUNC_IF_SOFTDIV(x) x
	#endif

	grub_int64_t
	EXPORT_FUNC_IF_SOFTDIV(grub_divmod64s) (grub_int64_t n,
	grub_int64_t d,
	grub_int64_t *r);

	grub_uint32_t
	EXPORT_FUNC_IF_SOFTDIV (grub_divmod32) (grub_uint32_t n,
	grub_uint32_t d,
	grub_uint32_t *r);

	grub_int32_t
	EXPORT_FUNC_IF_SOFTDIV (grub_divmod32s) (grub_int32_t n,
	grub_int32_t d,
	grub_int32_t *r);

	/* Inline functions. */

	static inline char *
	grub_memchr (const void *p, int c, grub_size_t len)
	{
	const char s = (const char ) p;
	const char *e = s + len;

	for (; s < e; s++)
	if (*s == c)
	return (char *) s;

	return 0;
	}


	static inline unsigned int
	grub_abs (int x)
	{
	if (x < 0)
	return (unsigned int) (-x);
	else
	return (unsigned int) x;
	}

	/* Reboot the machine. */
	#if defined (GRUB_MACHINE_EMU) \|\| defined (GRUB_MACHINE_QEMU_MIPS)
	void EXPORT_FUNC(grub_reboot) (void) __attribute__ ((noreturn));
	#else
	void grub_reboot (void) __attribute__ ((noreturn));
	#endif

	#if defined (__clang__) && !defined (GRUB_UTIL)
	void __attribute__ ((noreturn)) EXPORT_FUNC (abort) (void);
	#endif

	#ifdef GRUB_MACHINE_PCBIOS
	/* Halt the system, using APM if possible. If NO_APM is true, don't
	* use APM even if it is available. */
	void grub_halt (int no_apm) __attribute__ ((noreturn));
	#elif defined (__mips__) && !defined (GRUB_MACHINE_EMU)
	void EXPORT_FUNC (grub_halt) (void) __attribute__ ((noreturn));
	#else
	void grub_halt (void) __attribute__ ((noreturn));
	#endif

	#ifdef GRUB_MACHINE_EMU
	/* Flag to check if module loading is available. */
	extern const int EXPORT_VAR(grub_no_modules);
	#else
	#define grub_no_modules 0
	#endif

	static inline void
	grub_error_save (struct grub_error_saved *save)
	{
	grub_memcpy (save->errmsg, grub_errmsg, sizeof (save->errmsg));
	save->grub_errno = grub_errno;
	grub_errno = GRUB_ERR_NONE;
	}

	static inline void
	grub_error_load (const struct grub_error_saved *save)
	{
	grub_memcpy (grub_errmsg, save->errmsg, sizeof (grub_errmsg));
	grub_errno = save->grub_errno;
	}

	#if BOOT_TIME_STATS
	struct grub_boot_time
	{
	struct grub_boot_time *next;
	grub_uint64_t tp;
	const char *file;
	int line;
	char *msg;
	};

	extern struct grub_boot_time *EXPORT_VAR(grub_boot_time_head);

	void EXPORT_FUNC(grub_real_boot_time) (const char *file,
	const int line,
	const char *fmt, ...) __attribute__ ((format (GNU_PRINTF, 3, 4)));
	#define grub_boot_time(...) grub_real_boot_time(GRUB_FILE, __LINE__, __VA_ARGS__)
	#else
	#define grub_boot_time(...)
	#endif

	#define grub_max(a, b) (((a) > (b)) ? (a) : (b))
	#define grub_min(a, b) (((a) < (b)) ? (a) : (b))

	#endif /* ! GRUB_MISC_HEADER */