util.h

#ifndef GIT_COMPAT_UTIL_H
#define GIT_COMPAT_UTIL_H

#ifndef FLEX_ARRAY
/*
 * See if our compiler is known to support flexible array members.
 */
#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
# define FLEX_ARRAY /* empty */
#elif defined(__GNUC__)
# if (__GNUC__ >= 3)
#  define FLEX_ARRAY /* empty */
# else
#  define FLEX_ARRAY 0 /* older GNU extension */
# endif
#endif

/*
 * Otherwise, default to safer but a bit wasteful traditional style
 */
#ifndef FLEX_ARRAY
# define FLEX_ARRAY 1
#endif
#endif

#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))

#ifdef __GNUC__
#define TYPEOF(x) (__typeof__(x))
#else
#define TYPEOF(x)
#endif

#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
#define HAS_MULTI_BITS(i)  ((i) & ((i) - 1))  /* checks if an integer has more than 1 bit set */

/* Approximation of the length of the decimal representation of this type. */
#define decimal_length(x)	((int)(sizeof(x) * 2.56 + 0.5) + 1)

#define _ALL_SOURCE 1
#define _BSD_SOURCE 1
/* glibc 2.20 deprecates _BSD_SOURCE in favour of _DEFAULT_SOURCE */
#define _DEFAULT_SOURCE 1
#define HAS_BOOL

#include <unistd.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/statfs.h>
#include <fcntl.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/types.h>
#include <dirent.h>
#include <sys/time.h>
#include <time.h>
#include <signal.h>
#include <fnmatch.h>
#include <assert.h>
#include <regex.h>
#include <utime.h>
#include <sys/wait.h>
#include <poll.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <inttypes.h>
#include <linux/kernel.h>
#include <linux/magic.h>
#include <linux/types.h>
#include <sys/ttydefaults.h>
#include <api/fs/tracing_path.h>
#include <termios.h>
#include <linux/bitops.h>
#include <termios.h>

extern const char *graph_line;
extern const char *graph_dotted_line;
extern char buildid_dir[];

/* On most systems <limits.h> would have given us this, but
 * not on some systems (e.g. GNU/Hurd).
 */
#ifndef PATH_MAX
#define PATH_MAX 4096
#endif

#ifndef PRIuMAX
#define PRIuMAX "llu"
#endif

#ifndef PRIu32
#define PRIu32 "u"
#endif

#ifndef PRIx32
#define PRIx32 "x"
#endif

#ifndef PATH_SEP
#define PATH_SEP ':'
#endif

#ifndef STRIP_EXTENSION
#define STRIP_EXTENSION ""
#endif

#ifndef has_dos_drive_prefix
#define has_dos_drive_prefix(path) 0
#endif

#ifndef is_dir_sep
#define is_dir_sep(c) ((c) == '/')
#endif

#ifdef __GNUC__
#define NORETURN __attribute__((__noreturn__))
#else
#define NORETURN
#ifndef __attribute__
#define __attribute__(x)
#endif
#endif

#define PERF_GTK_DSO  "libperf-gtk.so"

/* General helper functions */
extern void usage(const char *err) NORETURN;
extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));

#include "../../../include/linux/stringify.h"

#define DIE_IF(cnd)	\
	do { if (cnd)	\
		die(" at (" __FILE__ ":" __stringify(__LINE__) "): "	\
		    __stringify(cnd) "\n");				\
	} while (0)


extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
extern void set_warning_routine(void (*routine)(const char *err, va_list params));

extern int prefixcmp(const char *str, const char *prefix);
extern void set_buildid_dir(const char *dir);

static inline const char *skip_prefix(const char *str, const char *prefix)
{
	size_t len = strlen(prefix);
	return strncmp(str, prefix, len) ? NULL : str + len;
}

#ifdef __GLIBC_PREREQ
#if __GLIBC_PREREQ(2, 1)
#define HAVE_STRCHRNUL
#endif
#endif

#ifndef HAVE_STRCHRNUL
#define strchrnul gitstrchrnul
static inline char *gitstrchrnul(const char *s, int c)
{
	while (*s && *s != c)
		s++;
	return (char *)s;
}
#endif

/*
 * Wrappers:
 */
extern char *xstrdup(const char *str);
extern void *xrealloc(void *ptr, size_t size) __attribute__((weak));


static inline void *zalloc(size_t size)
{
	return calloc(1, size);
}

#define zfree(ptr) ({ free(*ptr); *ptr = NULL; })

static inline int has_extension(const char *filename, const char *ext)
{
	size_t len = strlen(filename);
	size_t extlen = strlen(ext);

	return len > extlen && !memcmp(filename + len - extlen, ext, extlen);
}

/* Sane ctype - no locale, and works with signed chars */
#undef isascii
#undef isspace
#undef isdigit
#undef isxdigit
#undef isalpha
#undef isprint
#undef isalnum
#undef islower
#undef isupper
#undef tolower
#undef toupper

#ifndef NSEC_PER_MSEC
#define NSEC_PER_MSEC	1000000L
#endif

int parse_nsec_time(const char *str, u64 *ptime);

extern unsigned char sane_ctype[256];
#define GIT_SPACE		0x01
#define GIT_DIGIT		0x02
#define GIT_ALPHA		0x04
#define GIT_GLOB_SPECIAL	0x08
#define GIT_REGEX_SPECIAL	0x10
#define GIT_PRINT_EXTRA		0x20
#define GIT_PRINT		0x3E
#define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
#define isascii(x) (((x) & ~0x7f) == 0)
#define isspace(x) sane_istest(x,GIT_SPACE)
#define isdigit(x) sane_istest(x,GIT_DIGIT)
#define isxdigit(x)	\
	(sane_istest(toupper(x), GIT_ALPHA | GIT_DIGIT) && toupper(x) < 'G')
#define isalpha(x) sane_istest(x,GIT_ALPHA)
#define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
#define isprint(x) sane_istest(x,GIT_PRINT)
#define islower(x) (sane_istest(x,GIT_ALPHA) && (x & 0x20))
#define isupper(x) (sane_istest(x,GIT_ALPHA) && !(x & 0x20))
#define tolower(x) sane_case((unsigned char)(x), 0x20)
#define toupper(x) sane_case((unsigned char)(x), 0)

static inline int sane_case(int x, int high)
{
	if (sane_istest(x, GIT_ALPHA))
		x = (x & ~0x20) | high;
	return x;
}

int mkdir_p(char *path, mode_t mode);
int rm_rf(char *path);
int copyfile(const char *from, const char *to);
int copyfile_mode(const char *from, const char *to, mode_t mode);
int copyfile_offset(int fromfd, loff_t from_ofs, int tofd, loff_t to_ofs, u64 size);

s64 perf_atoll(const char *str);
char **argv_split(const char *str, int *argcp);
void argv_free(char **argv);
bool strglobmatch(const char *str, const char *pat);
bool strlazymatch(const char *str, const char *pat);
static inline bool strisglob(const char *str)
{
	return strpbrk(str, "*?[") != NULL;
}
int strtailcmp(const char *s1, const char *s2);
char *strxfrchar(char *s, char from, char to);
unsigned long convert_unit(unsigned long value, char *unit);
ssize_t readn(int fd, void *buf, size_t n);
ssize_t writen(int fd, void *buf, size_t n);

struct perf_event_attr;

void event_attr_init(struct perf_event_attr *attr);

#define _STR(x) #x
#define STR(x) _STR(x)

size_t hex_width(u64 v);
int hex2u64(const char *ptr, u64 *val);

char *ltrim(char *s);
char *rtrim(char *s);

void dump_stack(void);
void sighandler_dump_stack(int sig);

extern unsigned int page_size;
extern int cacheline_size;

void get_term_dimensions(struct winsize *ws);
void set_term_quiet_input(struct termios *old);

struct parse_tag {
	char tag;
	int mult;
};

unsigned long parse_tag_value(const char *str, struct parse_tag *tags);

#define SRCLINE_UNKNOWN  ((char *) "??:0")

static inline int path__join(char *bf, size_t size,
			     const char *path1, const char *path2)
{
	return scnprintf(bf, size, "%s%s%s", path1, path1[0] ? "/" : "", path2);
}

static inline int path__join3(char *bf, size_t size,
			      const char *path1, const char *path2,
			      const char *path3)
{
	return scnprintf(bf, size, "%s%s%s%s%s",
			 path1, path1[0] ? "/" : "",
			 path2, path2[0] ? "/" : "", path3);
}

struct dso;
struct symbol;

extern bool srcline_full_filename;
char *get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
		  bool show_sym);
char *__get_srcline(struct dso *dso, u64 addr, struct symbol *sym,
		  bool show_sym, bool unwind_inlines);
void free_srcline(char *srcline);

int filename__read_str(const char *filename, char **buf, size_t *sizep);
int perf_event_paranoid(void);

void mem_bswap_64(void *src, int byte_size);
void mem_bswap_32(void *src, int byte_size);

const char *get_filename_for_perf_kvm(void);
bool find_process(const char *name);

#ifdef HAVE_ZLIB_SUPPORT
int gzip_decompress_to_file(const char *input, int output_fd);
#endif

#ifdef HAVE_LZMA_SUPPORT
int lzma_decompress_to_file(const char *input, int output_fd);
#endif

char *asprintf_expr_inout_ints(const char *var, bool in, size_t nints, int *ints);

static inline char *asprintf_expr_in_ints(const char *var, size_t nints, int *ints)
{
	return asprintf_expr_inout_ints(var, true, nints, ints);
}

static inline char *asprintf_expr_not_in_ints(const char *var, size_t nints, int *ints)
{
	return asprintf_expr_inout_ints(var, false, nints, ints);
}

int get_stack_size(const char *str, unsigned long *_size);

int fetch_kernel_version(unsigned int *puint,
			 char *str, size_t str_sz);

#endif /* GIT_COMPAT_UTIL_H */