1 #ifndef GIT_COMPAT_UTIL_H
2 #define GIT_COMPAT_UTIL_H
4 #define _FILE_OFFSET_BITS 64
8 * See if our compiler is known to support flexible array members.
10 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
11 # define FLEX_ARRAY /* empty */
12 #elif defined(__GNUC__)
14 # define FLEX_ARRAY /* empty */
16 # define FLEX_ARRAY 0 /* older GNU extension */
21 * Otherwise, default to safer but a bit wasteful traditional style
28 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
31 #define TYPEOF(x) (__typeof__(x))
36 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
37 #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
39 /* Approximation of the length of the decimal representation of this type. */
40 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1)
49 #include <sys/statfs.h>
58 #include <sys/param.h>
59 #include <sys/types.h>
70 #include <sys/socket.h>
71 #include <sys/ioctl.h>
72 #include <sys/select.h>
73 #include <netinet/in.h>
74 #include <netinet/tcp.h>
75 #include <arpa/inet.h>
78 #include "../../../include/linux/magic.h"
80 #include <sys/ttydefaults.h>
82 extern const char *graph_line;
83 extern const char *graph_dotted_line;
84 extern char buildid_dir[];
86 /* On most systems <limits.h> would have given us this, but
87 * not on some systems (e.g. GNU/Hurd).
109 #ifndef STRIP_EXTENSION
110 #define STRIP_EXTENSION ""
113 #ifndef has_dos_drive_prefix
114 #define has_dos_drive_prefix(path) 0
118 #define is_dir_sep(c) ((c) == '/')
122 #define NORETURN __attribute__((__noreturn__))
125 #ifndef __attribute__
126 #define __attribute__(x)
130 /* General helper functions */
131 extern void usage(const char *err) NORETURN;
132 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
133 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
134 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
136 #include "../../../include/linux/stringify.h"
138 #define DIE_IF(cnd) \
140 die(" at (" __FILE__ ":" __stringify(__LINE__) "): " \
141 __stringify(cnd) "\n"); \
145 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
147 extern int prefixcmp(const char *str, const char *prefix);
148 extern void set_buildid_dir(void);
149 extern void disable_buildid_cache(void);
151 static inline const char *skip_prefix(const char *str, const char *prefix)
153 size_t len = strlen(prefix);
154 return strncmp(str, prefix, len) ? NULL : str + len;
157 #ifdef __GLIBC_PREREQ
158 #if __GLIBC_PREREQ(2, 1)
159 #define HAVE_STRCHRNUL
163 #ifndef HAVE_STRCHRNUL
164 #define strchrnul gitstrchrnul
165 static inline char *gitstrchrnul(const char *s, int c)
167 while (*s && *s != c)
176 extern char *xstrdup(const char *str);
177 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));
180 static inline void *zalloc(size_t size)
182 return calloc(1, size);
185 static inline int has_extension(const char *filename, const char *ext)
187 size_t len = strlen(filename);
188 size_t extlen = strlen(ext);
190 return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
193 /* Sane ctype - no locale, and works with signed chars */
206 extern unsigned char sane_ctype[256];
207 #define GIT_SPACE 0x01
208 #define GIT_DIGIT 0x02
209 #define GIT_ALPHA 0x04
210 #define GIT_GLOB_SPECIAL 0x08
211 #define GIT_REGEX_SPECIAL 0x10
212 #define GIT_PRINT_EXTRA 0x20
213 #define GIT_PRINT 0x3E
214 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
215 #define isascii(x) (((x) & ~0x7f) == 0)
216 #define isspace(x) sane_istest(x,GIT_SPACE)
217 #define isdigit(x) sane_istest(x,GIT_DIGIT)
218 #define isxdigit(x) \
219 (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
220 #define isalpha(x) sane_istest(x,GIT_ALPHA)
221 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
222 #define isprint(x) sane_istest(x,GIT_PRINT)
223 #define islower(x) (sane_istest(x,GIT_ALPHA) && sane_istest(x,0x20))
224 #define isupper(x) (sane_istest(x,GIT_ALPHA) && !sane_istest(x,0x20))
225 #define tolower(x) sane_case((unsigned char)(x), 0x20)
226 #define toupper(x) sane_case((unsigned char)(x), 0)
228 static inline int sane_case(int x, int high)
230 if (sane_istest(x, GIT_ALPHA))
231 x = (x & ~0x20) | high;
235 int mkdir_p(char *path, mode_t mode);
236 int copyfile(const char *from, const char *to);
238 s64 perf_atoll(const char *str);
239 char **argv_split(const char *str, int *argcp);
240 void argv_free(char **argv);
241 bool strglobmatch(const char *str, const char *pat);
242 bool strlazymatch(const char *str, const char *pat);
243 int strtailcmp(const char *s1, const char *s2);
244 unsigned long convert_unit(unsigned long value, char *unit);
245 int readn(int fd, void *buf, size_t size);
247 struct perf_event_attr;
249 void event_attr_init(struct perf_event_attr *attr);
252 #define STR(x) _STR(x)
255 * Determine whether some value is a power of two, where zero is
256 * *not* considered a power of two.
259 static inline __attribute__((const))
260 bool is_power_of_2(unsigned long n)
262 return (n != 0 && ((n & (n - 1)) == 0));
265 size_t hex_width(u64 v);