#ifndef GIT_COMPAT_UTIL_H #define GIT_COMPAT_UTIL_H #define _FILE_OFFSET_BITS 64 #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) #if !defined(__APPLE__) && !defined(__FreeBSD__) #define _XOPEN_SOURCE 600 /* glibc2 and AIX 5.3L need 500, OpenBSD needs 600 for S_ISLNK() */ #define _XOPEN_SOURCE_EXTENDED 1 /* AIX 5.3L needs this */ #endif #define _ALL_SOURCE 1 #define _GNU_SOURCE 1 #define _BSD_SOURCE 1 #include <unistd.h> #include <stdio.h> #include <sys/stat.h> #include <fcntl.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 <sys/wait.h> #include <fnmatch.h> #include <sys/poll.h> #include <sys/socket.h> #include <sys/ioctl.h> #include <utime.h> #ifndef NO_SYS_SELECT_H #include <sys/select.h> #endif #include <assert.h> #include <regex.h> #include <netinet/in.h> #include <netinet/tcp.h> #include <arpa/inet.h> #include <netdb.h> #include <pwd.h> #include <inttypes.h> #if defined(__CYGWIN__) #undef _XOPEN_SOURCE #include <grp.h> #define _XOPEN_SOURCE 600 #else #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */ #include <grp.h> #define _ALL_SOURCE 1 #endif #ifndef NO_ICONV #include <iconv.h> #endif /* 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 #ifdef __GNUC__ #define NORETURN __attribute__((__noreturn__)) #else #define NORETURN #ifndef __attribute__ #define __attribute__(x) #endif #endif /* 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))); extern void set_usage_routine(void (*routine)(const char *err) NORETURN); extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN); extern void set_error_routine(void (*routine)(const char *err, va_list params)); extern void set_warn_routine(void (*routine)(const char *warn, va_list params)); extern int prefixcmp(const char *str, const char *prefix); #ifdef NO_MMAP #ifndef PROT_READ #define PROT_READ 1 #define PROT_WRITE 2 #define MAP_PRIVATE 1 #define MAP_FAILED ((void*)-1) #endif #define mmap git_mmap #define munmap git_munmap extern void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); extern int git_munmap(void *start, size_t length); /* This value must be multiple of (pagesize * 2) */ #define DEFAULT_PACKED_GIT_WINDOW_SIZE (1 * 1024 * 1024) #else /* NO_MMAP */ #include <sys/mman.h> /* This value must be multiple of (pagesize * 2) */ #define DEFAULT_PACKED_GIT_WINDOW_SIZE \ (sizeof(void*) >= 8 \ ? 1 * 1024 * 1024 * 1024 \ : 32 * 1024 * 1024) #endif /* NO_MMAP */ #define DEFAULT_PACKED_GIT_LIMIT \ ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256)) #ifdef NO_PREAD #define pread git_pread extern ssize_t git_pread(int fd, void *buf, size_t count, off_t offset); #endif #ifdef NO_SETENV #define setenv gitsetenv extern int gitsetenv(const char *, const char *, int); #endif #ifdef NO_MKDTEMP #define mkdtemp gitmkdtemp extern char *gitmkdtemp(char *); #endif #ifdef NO_UNSETENV #define unsetenv gitunsetenv extern void gitunsetenv(const char *); #endif #ifdef NO_STRCASESTR #define strcasestr gitstrcasestr extern char *gitstrcasestr(const char *haystack, const char *needle); #endif #ifdef NO_STRLCPY #define strlcpy gitstrlcpy extern size_t gitstrlcpy(char *, const char *, size_t); #endif #ifdef NO_STRTOUMAX #define strtoumax gitstrtoumax extern uintmax_t gitstrtoumax(const char *, char **, int); #endif #ifdef NO_HSTRERROR #define hstrerror githstrerror extern const char *githstrerror(int herror); #endif #ifdef NO_MEMMEM #define memmem gitmemmem void *gitmemmem(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen); #endif #ifdef FREAD_READS_DIRECTORIES #define fopen(a,b) git_fopen(a,b) extern FILE *git_fopen(const char*, const char*); #endif #ifdef SNPRINTF_RETURNS_BOGUS #define snprintf git_snprintf extern int git_snprintf(char *str, size_t maxsize, const char *format, ...); #define vsnprintf git_vsnprintf extern int git_vsnprintf(char *str, size_t maxsize, const char *format, va_list ap); #endif #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 extern void release_pack_memory(size_t, int); static inline char* xstrdup(const char *str) { char *ret = strdup(str); if (!ret) { release_pack_memory(strlen(str) + 1, -1); ret = strdup(str); if (!ret) die("Out of memory, strdup failed"); } return ret; } static inline void *xmalloc(size_t size) { void *ret = malloc(size); if (!ret && !size) ret = malloc(1); if (!ret) { release_pack_memory(size, -1); ret = malloc(size); if (!ret && !size) ret = malloc(1); if (!ret) die("Out of memory, malloc failed"); } #ifdef XMALLOC_POISON memset(ret, 0xA5, size); #endif return ret; } static inline void *xmemdupz(const void *data, size_t len) { char *p = xmalloc(len + 1); memcpy(p, data, len); p[len] = '\0'; return p; } static inline char *xstrndup(const char *str, size_t len) { char *p = memchr(str, '\0', len); return xmemdupz(str, p ? p - str : len); } static inline void *xrealloc(void *ptr, size_t size) { void *ret = realloc(ptr, size); if (!ret && !size) ret = realloc(ptr, 1); if (!ret) { release_pack_memory(size, -1); ret = realloc(ptr, size); if (!ret && !size) ret = realloc(ptr, 1); if (!ret) die("Out of memory, realloc failed"); } return ret; } static inline void *xcalloc(size_t nmemb, size_t size) { void *ret = calloc(nmemb, size); if (!ret && (!nmemb || !size)) ret = calloc(1, 1); if (!ret) { release_pack_memory(nmemb * size, -1); ret = calloc(nmemb, size); if (!ret && (!nmemb || !size)) ret = calloc(1, 1); if (!ret) die("Out of memory, calloc failed"); } return ret; } static inline void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset) { void *ret = mmap(start, length, prot, flags, fd, offset); if (ret == MAP_FAILED) { if (!length) return NULL; release_pack_memory(length, fd); ret = mmap(start, length, prot, flags, fd, offset); if (ret == MAP_FAILED) die("Out of memory? mmap failed: %s", strerror(errno)); } return ret; } static inline ssize_t xread(int fd, void *buf, size_t len) { ssize_t nr; while (1) { nr = read(fd, buf, len); if ((nr < 0) && (errno == EAGAIN || errno == EINTR)) continue; return nr; } } static inline ssize_t xwrite(int fd, const void *buf, size_t len) { ssize_t nr; while (1) { nr = write(fd, buf, len); if ((nr < 0) && (errno == EAGAIN || errno == EINTR)) continue; return nr; } } static inline int xdup(int fd) { int ret = dup(fd); if (ret < 0) die("dup failed: %s", strerror(errno)); return ret; } static inline FILE *xfdopen(int fd, const char *mode) { FILE *stream = fdopen(fd, mode); if (stream == NULL) die("Out of memory? fdopen failed: %s", strerror(errno)); return stream; } static inline int xmkstemp(char *template) { int fd; fd = mkstemp(template); if (fd < 0) die("Unable to create temporary file: %s", strerror(errno)); return fd; } static inline size_t xsize_t(off_t len) { return (size_t)len; } 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 isspace #undef isdigit #undef isalpha #undef isalnum #undef tolower #undef toupper extern unsigned char sane_ctype[256]; #define GIT_SPACE 0x01 #define GIT_DIGIT 0x02 #define GIT_ALPHA 0x04 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) #define isspace(x) sane_istest(x,GIT_SPACE) #define isdigit(x) sane_istest(x,GIT_DIGIT) #define isalpha(x) sane_istest(x,GIT_ALPHA) #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) #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; } static inline int strtoul_ui(char const *s, int base, unsigned int *result) { unsigned long ul; char *p; errno = 0; ul = strtoul(s, &p, base); if (errno || *p || p == s || (unsigned int) ul != ul) return -1; *result = ul; return 0; } static inline int strtol_i(char const *s, int base, int *result) { long ul; char *p; errno = 0; ul = strtol(s, &p, base); if (errno || *p || p == s || (int) ul != ul) return -1; *result = ul; return 0; } #ifdef INTERNAL_QSORT void git_qsort(void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *)); #define qsort git_qsort #endif #ifndef DIR_HAS_BSD_GROUP_SEMANTICS # define FORCE_DIR_SET_GID S_ISGID #else # define FORCE_DIR_SET_GID 0 #endif #endif