grub/include/grub/misc.h

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

#define ALIGN_UP(addr, align) \
	((addr + (typeof (addr)) align - 1) & ~((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, fmt, args...) grub_real_dprintf(__FILE__, __LINE__, condition, fmt, ## args)
/* XXX: If grub_memmove is too slow, we must implement grub_memcpy.  */
#define grub_memcpy(d,s,n)	grub_memmove ((d), (s), (n))

void *EXPORT_FUNC(grub_memmove) (void *dest, const void *src, grub_size_t n);
char *EXPORT_FUNC(grub_strcpy) (char *dest, const char *src);
char *EXPORT_FUNC(grub_strncpy) (char *dest, const char *src, int c);
char *EXPORT_FUNC(grub_stpcpy) (char *dest, const char *src);

static inline char *
grub_strcat (char *dest, const char *src)
{
  char *p = dest;

  while (*p)
    p++;

  while ((*p = *src) != '\0')
    {
      p++;
      src++;
    }

  return dest;
}

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

  while (*p)
    p++;

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

  *p = '\0';

  return dest;
}

/* Prototypes for aliases.  */
#ifndef GRUB_UTIL
int EXPORT_FUNC(memcmp) (const void *s1, const void *s2, grub_size_t n);
void *EXPORT_FUNC(memmove) (void *dest, const void *src, grub_size_t n);
void *EXPORT_FUNC(memcpy) (void *dest, const void *src, grub_size_t n);
void *EXPORT_FUNC(memset) (void *s, int c, grub_size_t n);
#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);
char *EXPORT_FUNC(grub_strstr) (const char *haystack, const char *needle);
int EXPORT_FUNC(grub_isspace) (int c);
int EXPORT_FUNC(grub_isprint) (int c);

static inline int
grub_isalpha (int c)
{
  return (c >= 'a' && c <= 'z') || (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_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 (*s1) != grub_tolower (*s2))
	break;

      s1++;
      s2++;
    }

  return (int) grub_tolower (*s1) - (int) grub_tolower (*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 (*s1) - (int) grub_tolower (*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);
char *EXPORT_FUNC(grub_strdup) (const char *s);
char *EXPORT_FUNC(grub_strndup) (const char *s, grub_size_t n);
void *EXPORT_FUNC(grub_memset) (void *s, int c, grub_size_t n);
grub_size_t EXPORT_FUNC(grub_strlen) (const char *s);
int EXPORT_FUNC(grub_printf) (const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
int EXPORT_FUNC(grub_printf_) (const char *fmt, ...) __attribute__ ((format (printf, 1, 2)));
void EXPORT_FUNC(grub_real_dprintf) (const char *file,
                                     const int line,
                                     const char *condition,
                                     const char *fmt, ...) __attribute__ ((format (printf, 4, 5)));
int EXPORT_FUNC(grub_vprintf) (const char *fmt, va_list args);
int EXPORT_FUNC(grub_sprintf) (char *str, const char *fmt, ...) __attribute__ ((format (printf, 2, 3)));
int EXPORT_FUNC(grub_vsprintf) (char *str, const char *fmt, va_list args);
void EXPORT_FUNC(grub_exit) (void) __attribute__ ((noreturn));
void EXPORT_FUNC(grub_abort) (void) __attribute__ ((noreturn));
grub_uint8_t *EXPORT_FUNC(grub_utf16_to_utf8) (grub_uint8_t *dest,
					       grub_uint16_t *src,
					       grub_size_t size);
grub_ssize_t EXPORT_FUNC(grub_utf8_to_ucs4) (grub_uint32_t *dest,
					     grub_size_t destsize,
					     const grub_uint8_t *src,
					     grub_size_t srcsize,
					     const grub_uint8_t **srcend);
grub_uint64_t EXPORT_FUNC(grub_divmod64) (grub_uint64_t n,
					  grub_uint32_t d, grub_uint32_t *r);

#ifdef NEED_ENABLE_EXECUTE_STACK
void EXPORT_FUNC(__enable_execute_stack) (void *addr);
#endif

/* Inline functions.  */

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

static inline long
grub_max (long x, long y)
{
  if (x > y)
    return x;
  else
    return y;
}

/* Rounded-up division */
static inline unsigned int
grub_div_roundup (unsigned int x, unsigned int y)
{
  return (x + y - 1) / y;
}

/* Reboot the machine.  */
void EXPORT_FUNC (grub_reboot) (void);

#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 EXPORT_FUNC (grub_halt) (int no_apm);
#else
void EXPORT_FUNC (grub_halt) (void);
#endif

#endif /* ! GRUB_MISC_HEADER */