1 #ifndef GIT_COMPAT_UTIL_H 2 #define GIT_COMPAT_UTIL_H 3 4 #ifndef FLEX_ARRAY 5 /* 6 * See if our compiler is known to support flexible array members. 7 */ 8 #if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) 9 # define FLEX_ARRAY /* empty */ 10 #elif defined(__GNUC__) 11 # if (__GNUC__ >= 3) 12 # define FLEX_ARRAY /* empty */ 13 # else 14 # define FLEX_ARRAY 0 /* older GNU extension */ 15 # endif 16 #endif 17 18 /* 19 * Otherwise, default to safer but a bit wasteful traditional style 20 */ 21 #ifndef FLEX_ARRAY 22 # define FLEX_ARRAY 1 23 #endif 24 #endif 25 26 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) 27 28 #ifdef __GNUC__ 29 #define TYPEOF(x) (__typeof__(x)) 30 #else 31 #define TYPEOF(x) 32 #endif 33 34 #define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits)))) 35 #define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */ 36 37 /* Approximation of the length of the decimal representation of this type. */ 38 #define decimal_length(x) ((int)(sizeof(x) * 2.56 + 0.5) + 1) 39 40 #define _ALL_SOURCE 1 41 #define _BSD_SOURCE 1 42 #define HAS_BOOL 43 44 #include <unistd.h> 45 #include <stdio.h> 46 #include <sys/stat.h> 47 #include <sys/statfs.h> 48 #include <fcntl.h> 49 #include <stdbool.h> 50 #include <stddef.h> 51 #include <stdlib.h> 52 #include <stdarg.h> 53 #include <string.h> 54 #include <errno.h> 55 #include <limits.h> 56 #include <sys/param.h> 57 #include <sys/types.h> 58 #include <dirent.h> 59 #include <sys/time.h> 60 #include <time.h> 61 #include <signal.h> 62 #include <fnmatch.h> 63 #include <assert.h> 64 #include <regex.h> 65 #include <utime.h> 66 #include <sys/wait.h> 67 #include <sys/poll.h> 68 #include <sys/socket.h> 69 #include <sys/ioctl.h> 70 #include <inttypes.h> 71 #include <linux/magic.h> 72 #include "types.h" 73 #include <sys/ttydefaults.h> 74 #include <lk/debugfs.h> 75 #include <termios.h> 76 77 extern const char *graph_line; 78 extern const char *graph_dotted_line; 79 extern char buildid_dir[]; 80 extern char tracing_events_path[]; 81 extern void perf_debugfs_set_path(const char *mountpoint); 82 const char *perf_debugfs_mount(const char *mountpoint); 83 const char *find_tracing_dir(void); 84 char *get_tracing_file(const char *name); 85 void put_tracing_file(char *file); 86 87 /* On most systems <limits.h> would have given us this, but 88 * not on some systems (e.g. GNU/Hurd). 89 */ 90 #ifndef PATH_MAX 91 #define PATH_MAX 4096 92 #endif 93 94 #ifndef PRIuMAX 95 #define PRIuMAX "llu" 96 #endif 97 98 #ifndef PRIu32 99 #define PRIu32 "u" 100 #endif 101 102 #ifndef PRIx32 103 #define PRIx32 "x" 104 #endif 105 106 #ifndef PATH_SEP 107 #define PATH_SEP ':' 108 #endif 109 110 #ifndef STRIP_EXTENSION 111 #define STRIP_EXTENSION "" 112 #endif 113 114 #ifndef has_dos_drive_prefix 115 #define has_dos_drive_prefix(path) 0 116 #endif 117 118 #ifndef is_dir_sep 119 #define is_dir_sep(c) ((c) == '/') 120 #endif 121 122 #ifdef __GNUC__ 123 #define NORETURN __attribute__((__noreturn__)) 124 #else 125 #define NORETURN 126 #ifndef __attribute__ 127 #define __attribute__(x) 128 #endif 129 #endif 130 131 /* General helper functions */ 132 extern void usage(const char *err) NORETURN; 133 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); 134 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); 135 extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2))); 136 137 #include "../../../include/linux/stringify.h" 138 139 #define DIE_IF(cnd) \ 140 do { if (cnd) \ 141 die(" at (" __FILE__ ":" __stringify(__LINE__) "): " \ 142 __stringify(cnd) "\n"); \ 143 } while (0) 144 145 146 extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN); 147 148 extern int prefixcmp(const char *str, const char *prefix); 149 extern void set_buildid_dir(void); 150 extern void disable_buildid_cache(void); 151 152 static inline const char *skip_prefix(const char *str, const char *prefix) 153 { 154 size_t len = strlen(prefix); 155 return strncmp(str, prefix, len) ? NULL : str + len; 156 } 157 158 #ifdef __GLIBC_PREREQ 159 #if __GLIBC_PREREQ(2, 1) 160 #define HAVE_STRCHRNUL 161 #endif 162 #endif 163 164 #ifndef HAVE_STRCHRNUL 165 #define strchrnul gitstrchrnul 166 static inline char *gitstrchrnul(const char *s, int c) 167 { 168 while (*s && *s != c) 169 s++; 170 return (char *)s; 171 } 172 #endif 173 174 /* 175 * Wrappers: 176 */ 177 extern char *xstrdup(const char *str); 178 extern void *xrealloc(void *ptr, size_t size) __attribute__((weak)); 179 180 181 static inline void *zalloc(size_t size) 182 { 183 return calloc(1, size); 184 } 185 186 static inline int has_extension(const char *filename, const char *ext) 187 { 188 size_t len = strlen(filename); 189 size_t extlen = strlen(ext); 190 191 return len > extlen && !memcmp(filename + len - extlen, ext, extlen); 192 } 193 194 /* Sane ctype - no locale, and works with signed chars */ 195 #undef isascii 196 #undef isspace 197 #undef isdigit 198 #undef isxdigit 199 #undef isalpha 200 #undef isprint 201 #undef isalnum 202 #undef islower 203 #undef isupper 204 #undef tolower 205 #undef toupper 206 207 #ifndef NSEC_PER_MSEC 208 #define NSEC_PER_MSEC 1000000L 209 #endif 210 211 int parse_nsec_time(const char *str, u64 *ptime); 212 213 extern unsigned char sane_ctype[256]; 214 #define GIT_SPACE 0x01 215 #define GIT_DIGIT 0x02 216 #define GIT_ALPHA 0x04 217 #define GIT_GLOB_SPECIAL 0x08 218 #define GIT_REGEX_SPECIAL 0x10 219 #define GIT_PRINT_EXTRA 0x20 220 #define GIT_PRINT 0x3E 221 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) 222 #define isascii(x) (((x) & ~0x7f) == 0) 223 #define isspace(x) sane_istest(x,GIT_SPACE) 224 #define isdigit(x) sane_istest(x,GIT_DIGIT) 225 #define isxdigit(x) \ 226 (sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G') 227 #define isalpha(x) sane_istest(x,GIT_ALPHA) 228 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) 229 #define isprint(x) sane_istest(x,GIT_PRINT) 230 #define islower(x) (sane_istest(x,GIT_ALPHA) && (x & 0x20)) 231 #define isupper(x) (sane_istest(x,GIT_ALPHA) && !(x & 0x20)) 232 #define tolower(x) sane_case((unsigned char)(x), 0x20) 233 #define toupper(x) sane_case((unsigned char)(x), 0) 234 235 static inline int sane_case(int x, int high) 236 { 237 if (sane_istest(x, GIT_ALPHA)) 238 x = (x & ~0x20) | high; 239 return x; 240 } 241 242 int mkdir_p(char *path, mode_t mode); 243 int copyfile(const char *from, const char *to); 244 245 s64 perf_atoll(const char *str); 246 char **argv_split(const char *str, int *argcp); 247 void argv_free(char **argv); 248 bool strglobmatch(const char *str, const char *pat); 249 bool strlazymatch(const char *str, const char *pat); 250 int strtailcmp(const char *s1, const char *s2); 251 char *strxfrchar(char *s, char from, char to); 252 unsigned long convert_unit(unsigned long value, char *unit); 253 int readn(int fd, void *buf, size_t size); 254 255 struct perf_event_attr; 256 257 void event_attr_init(struct perf_event_attr *attr); 258 259 #define _STR(x) #x 260 #define STR(x) _STR(x) 261 262 /* 263 * Determine whether some value is a power of two, where zero is 264 * *not* considered a power of two. 265 */ 266 267 static inline __attribute__((const)) 268 bool is_power_of_2(unsigned long n) 269 { 270 return (n != 0 && ((n & (n - 1)) == 0)); 271 } 272 273 size_t hex_width(u64 v); 274 int hex2u64(const char *ptr, u64 *val); 275 276 char *ltrim(char *s); 277 char *rtrim(char *s); 278 279 void dump_stack(void); 280 281 extern unsigned int page_size; 282 283 void get_term_dimensions(struct winsize *ws); 284 #endif /* GIT_COMPAT_UTIL_H */ 285