#ifndef UTILS_H
#define UTILS_H 1
+#include <errno.h>
#include <inttypes.h>
+#include <stdarg.h>
#include <stdbool.h>
+#include <stdio.h>
#include <string.h>
-#include <strings.h>
+#if HAVE_UNISTD_H
+# include <unistd.h>
+#else
+/* Required on Windows where unistd.h doesn't exist */
+# define R_OK 4 /* Test for read permission. */
+# define W_OK 2 /* Test for write permission. */
+# define X_OK 1 /* Test for execute permission. */
+# define F_OK 0 /* Test for existence. */
+#endif
+
+#ifdef _WIN32
+# include <direct.h>
+# include <io.h>
+# ifndef S_ISDIR
+# define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
+# endif
+#endif
#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))
+#define STATIC_ASSERT(expr, message) do { \
+ switch (0) { case 0: case (expr): ; } \
+} while (0)
+
+#define ARRAY_SIZE(arr) ((sizeof(arr) / sizeof(*(arr))))
+
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+
+/* Round up @a so it's divisible by @b. */
+#define ROUNDUP(a, b) (((a) + (b) - 1) / (b) * (b))
+
+#define STRINGIFY(x) #x
+#define STRINGIFY2(x) STRINGIFY(x)
+
+/* Check if a character is valid in a string literal */
+static inline bool
+is_valid_char(char c)
+{
+ /* Currently we only check for NULL character, but this could be extended
+ * in the future to further ASCII control characters. */
+ return c != 0;
+}
+
+char
+to_lower(char c);
+
+int
+istrcmp(const char *a, const char *b);
+
+int
+istrncmp(const char *a, const char *b, size_t n);
static inline bool
streq(const char *s1, const char *s2)
{
+ assert(s1 && s2);
return strcmp(s1, s2) == 0;
}
static inline bool
+streq_null(const char *s1, const char *s2)
+{
+ if (s1 == NULL || s2 == NULL)
+ return s1 == s2;
+ return streq(s1, s2);
+}
+
+static inline bool
streq_not_null(const char *s1, const char *s2)
{
if (!s1 || !s2)
static inline bool
istreq(const char *s1, const char *s2)
{
- return strcasecmp(s1, s2) == 0;
+ return istrcmp(s1, s2) == 0;
}
static inline bool
istreq_prefix(const char *s1, const char *s2)
{
- return strncasecmp(s1, s2, strlen(s1)) == 0;
+ return istrncmp(s1, s2, strlen(s1)) == 0;
}
static inline char *
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 ? s : "(null)";
}
-#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))
+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 = calloc(nmemb, size);
+ if (p)
+ memcpy(p, mem, nmemb * size);
+ return p;
+}
+
+#if !(defined(HAVE_STRNDUP) && HAVE_STRNDUP)
+static inline char *
+strndup(const char *s, size_t n)
+{
+ size_t slen = strlen(s);
+ size_t len = MIN(slen, n);
+ char *p = malloc(len + 1);
+ if (!p)
+ return NULL;
+ memcpy(p, s, len);
+ p[len] = '\0';
+ return p;
+}
+#endif
+
+/* 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;
+}
+
+static inline int
+one_bit_set(uint32_t x)
+{
+ return x && (x & (x - 1)) == 0;
+}
+
+bool
+map_file(FILE *file, char **string_out, size_t *size_out);
+
+void
+unmap_file(char *string, size_t size);
+
+static inline bool
+check_eaccess(const char *path, int mode)
+{
+#if defined(HAVE_EACCESS)
+ if (eaccess(path, mode) != 0)
+ return false;
+#elif defined(HAVE_EUIDACCESS)
+ if (euidaccess(path, mode) != 0)
+ return false;
+#endif
+
+ return true;
+}
+
+#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 */
# define XKB_EXPORT
#endif
-#if defined(__GNUC__) && ((__GNUC__ * 100 + __GNUC_MINOR__) >= 203)
+#if defined(__MINGW32__)
+# define ATTR_PRINTF(x,y) __attribute__((__format__(__MINGW_PRINTF_FORMAT, x, y)))
+#elif 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)
# 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
+
+#if !(defined(HAVE_ASPRINTF) && HAVE_ASPRINTF)
+int asprintf(char **strp, const char *fmt, ...) ATTR_PRINTF(2, 3);
+# if !(defined(HAVE_VASPRINTF) && HAVE_VASPRINTF)
+# include <stdarg.h>
+int vasprintf(char **strp, const char *fmt, va_list ap);
+# endif /* !HAVE_VASPRINTF */
+#endif /* !HAVE_ASPRINTF */
+
+static inline bool
+ATTR_PRINTF(3, 4)
+snprintf_safe(char *buf, size_t sz, const char *format, ...)
+{
+ va_list ap;
+ int rc;
+
+ va_start(ap, format);
+ rc = vsnprintf(buf, sz, format, ap);
+ va_end(ap);
+
+ return rc >= 0 && (size_t)rc < sz;
+}
+
+static inline char *
+ATTR_PRINTF(1, 0)
+vasprintf_safe(const char *fmt, va_list args)
+{
+ char *str;
+ int len;
+
+ len = vasprintf(&str, fmt, args);
+
+ if (len == -1)
+ return NULL;
+
+ return str;
+}
+
+/**
+ * A version of asprintf that returns the allocated string or NULL on error.
+ */
+static inline char *
+ATTR_PRINTF(1, 2)
+asprintf_safe(const char *fmt, ...)
+{
+ va_list args;
+ char *str;
+
+ va_start(args, fmt);
+ str = vasprintf_safe(fmt, args);
+ va_end(args);
+
+ return str;
+}
+
#endif /* UTILS_H */
projects / platform / upstream / libxkbcommon.git / blobdiff