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/*
* Copyright © 2012 Ran Benita <ran234@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef UTILS_H
#define UTILS_H 1
#include <errno.h>
#include <inttypes.h>
#include <stdbool.h>
#include <stdio.h>
#include <string.h>
#include <strings.h>
#include "darray.h"
/*
* We sometimes malloc strings and then expose them as const char*'s. This
* macro is used when we free these strings in order to avoid -Wcast-qual
* errors.
*/
#define UNCONSTIFY(const_ptr) ((void *) (uintptr_t) (const_ptr))
static inline bool
streq(const char *s1, const char *s2)
{
return strcmp(s1, s2) == 0;
}
static inline bool
streq_not_null(const char *s1, const char *s2)
{
if (!s1 || !s2)
return false;
return streq(s1, s2);
}
static inline bool
istreq(const char *s1, const char *s2)
{
return strcasecmp(s1, s2) == 0;
}
static inline bool
istreq_prefix(const char *s1, const char *s2)
{
return strncasecmp(s1, s2, strlen(s1)) == 0;
}
static inline char *
strdup_safe(const char *s)
{
return s ? strdup(s) : NULL;
}
static inline size_t
strlen_safe(const char *s)
{
return s ? strlen(s) : 0;
}
static inline bool
isempty(const char *s)
{
return s == NULL || s[0] == '\0';
}
static inline const char *
strnull(const char *s)
{
return s ? s : "(null)";
}
static inline const char *
strempty(const char *s)
{
return s ? s : "";
}
static inline void *
memdup(const void *mem, size_t nmemb, size_t size)
{
void *p = malloc(nmemb * size);
if (p)
memcpy(p, mem, nmemb * size);
return p;
}
static inline int
min(int misc, int other)
{
return (misc < other) ? misc : other;
}
static inline int
max(int misc, int other)
{
return (misc > other) ? misc : other;
}
/* ctype.h is locale-dependent and has other oddities. */
static inline bool
is_space(char ch)
{
return ch == ' ' || (ch >= '\t' && ch <= '\r');
}
static inline bool
is_alpha(char ch)
{
return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z');
}
static inline bool
is_digit(char ch)
{
return ch >= '0' && ch <= '9';
}
static inline bool
is_alnum(char ch)
{
return is_alpha(ch) || is_digit(ch);
}
static inline bool
is_xdigit(char ch)
{
return
(ch >= '0' && ch <= '9') ||
(ch >= 'a' && ch <= 'f') ||
(ch >= 'A' && ch <= 'F');
}
static inline bool
is_graph(char ch)
{
/* See table in ascii(7). */
return ch >= '!' && ch <= '~';
}
/*
* Return the bit position of the most significant bit.
* Note: this is 1-based! It's more useful this way, and returns 0 when
* mask is all 0s.
*/
static inline unsigned
msb_pos(uint32_t mask)
{
unsigned pos = 0;
while (mask) {
pos++;
mask >>= 1u;
}
return pos;
}
bool
map_file(FILE *file, const char **string_out, size_t *size_out);
void
unmap_file(const char *str, size_t size);
#define ARRAY_SIZE(arr) ((sizeof(arr) / sizeof(*(arr))))
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MIN3(a, b, c) MIN(MIN((a), (b)), (c))
#define MAX(a, b) ((a) > (b) ? (a) : (b))
#define MAX3(a, b, c) MAX(MAX((a), (b)), (c))
#if defined(HAVE_SECURE_GETENV)
# define secure_getenv secure_getenv
#elif defined(HAVE___SECURE_GETENV)
# define secure_getenv __secure_getenv
#else
# define secure_getenv getenv
#endif
#if defined(HAVE___BUILTIN_EXPECT)
# define likely(x) __builtin_expect(!!(x), 1)
# define unlikely(x) __builtin_expect(!!(x), 0)
#else
# define likely(x) (x)
# define unlikely(x) (x)
#endif
/* Compiler Attributes */
#if defined(__GNUC__) && (__GNUC__ >= 4) && !defined(__CYGWIN__)
# define XKB_EXPORT __attribute__((visibility("default")))
#elif defined(__SUNPRO_C) && (__SUNPRO_C >= 0x550)
# define XKB_EXPORT __global
#else /* not gcc >= 4 and not Sun Studio >= 8 */
# define XKB_EXPORT
#endif
#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 203)
# define ATTR_PRINTF(x,y) __attribute__((__format__(__printf__, x, y)))
#else /* not gcc >= 2.3 */
# define ATTR_PRINTF(x,y)
#endif
#if (defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 205)) \
|| (defined(__SUNPRO_C) && (__SUNPRO_C >= 0x590))
# define ATTR_NORETURN __attribute__((__noreturn__))
#else
# define ATTR_NORETURN
#endif /* GNUC */
#if (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 296)
#define ATTR_MALLOC __attribute__((__malloc__))
#else
#define ATTR_MALLOC
#endif
#if defined(__GNUC__) && (__GNUC__ >= 4)
# define ATTR_NULL_SENTINEL __attribute__((__sentinel__))
#else
# define ATTR_NULL_SENTINEL
#endif /* GNUC >= 4 */
#if (defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__) >= 295)
#define ATTR_PACKED __attribute__((__packed__))
#else
#define ATTR_PACKED
#endif
#endif /* UTILS_H */
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