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