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/* Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
/* Various utility functions and macros */
#ifndef __CROS_EC_UTIL_H
#define __CROS_EC_UTIL_H
#include "common.h"
#include "config.h"
#include "panic.h"
/**
* Trigger a compilation failure if the condition
* is not verified at build time.
*/
#define BUILD_ASSERT(cond) ((void)sizeof(char[1 - 2*!(cond)]))
/**
* Trigger a debug exception if the condition
* is not verified at runtime.
*/
#ifdef CONFIG_DEBUG
# ifdef CONFIG_ASSERT_HELP
# define ASSERT(cond) do { \
if (!(cond)) \
panic_assert_fail(#cond, __func__, __FILE__, \
__LINE__); \
} while (0);
# else
# define ASSERT(cond) do { \
if (!(cond)) \
__asm("bkpt"); \
} while (0);
# endif
#else
#define ASSERT(cond)
#endif
/* Standard macros / definitions */
#ifndef ARRAY_SIZE
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#endif
#ifndef MAX
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#endif
#ifndef MIN
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
#ifndef NULL
#define NULL ((void *)0)
#endif
/**
* macros for integer division with various rounding variants
* default integer division rounds down.
*/
#define DIV_ROUND_UP(x, y) (((x) + ((y) - 1)) / (y))
#define DIV_ROUND_NEAREST(x, y) (((x) + ((y) / 2)) / (y))
/* Standard library functions */
int atoi(const char *nptr);
int isdigit(int c);
int isspace(int c);
int isalpha(int c);
int isprint(int c);
int memcmp(const void *s1, const void *s2, int len);
void *memcpy(void *dest, const void *src, int len);
void *memset(void *dest, int c, int len);
void *memmove(void *dest, const void *src, int len);
int strcasecmp(const char *s1, const char *s2);
int strncasecmp(const char *s1, const char *s2, int size);
int strlen(const char *s);
/* Like strtol(), but for integers. */
int strtoi(const char *nptr, char **endptr, int base);
/* Like strncpy(), but guarantees null termination. */
char *strzcpy(char *dest, const char *src, int len);
int tolower(int c);
/* 64-bit divide-and-modulo. Does the equivalent of:
*
* r = *n % d;
* *n /= d;
* return r;
*/
int uint64divmod(uint64_t *v, int by);
#endif /* __CROS_EC_UTIL_H */
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