diff options
Diffstat (limited to 'git-compat-util.h')
| -rw-r--r-- | git-compat-util.h | 473 |
1 files changed, 442 insertions, 31 deletions
diff --git a/git-compat-util.h b/git-compat-util.h index ef60803384..553fc01762 100644 --- a/git-compat-util.h +++ b/git-compat-util.h @@ -28,6 +28,24 @@ #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) #define bitsizeof(x) (CHAR_BIT * sizeof(x)) +#define maximum_signed_value_of_type(a) \ + (INTMAX_MAX >> (bitsizeof(intmax_t) - bitsizeof(a))) + +#define maximum_unsigned_value_of_type(a) \ + (UINTMAX_MAX >> (bitsizeof(uintmax_t) - bitsizeof(a))) + +/* + * Signed integer overflow is undefined in C, so here's a helper macro + * to detect if the sum of two integers will overflow. + * + * Requires: a >= 0, typeof(a) equals typeof(b) + */ +#define signed_add_overflows(a, b) \ + ((b) > maximum_signed_value_of_type(a) - (a)) + +#define unsigned_add_overflows(a, b) \ + ((b) > maximum_unsigned_value_of_type(a) - (a)) + #ifdef __GNUC__ #define TYPEOF(x) (__typeof__(x)) #else @@ -55,20 +73,28 @@ # else # define _XOPEN_SOURCE 500 # endif -#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && !defined(_M_UNIX) && !defined(sgi) +#elif !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(__USLC__) && \ + !defined(_M_UNIX) && !defined(__sgi) && !defined(__DragonFly__) && \ + !defined(__TANDEM) && !defined(__QNX__) && !defined(__MirBSD__) && \ + !defined(__CYGWIN__) #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 +#define _DEFAULT_SOURCE 1 #define _NETBSD_SOURCE 1 #define _SGI_SOURCE 1 -#ifdef WIN32 /* Both MinGW and MSVC */ +#if defined(WIN32) && !defined(__CYGWIN__) /* Both MinGW and MSVC */ +# if defined (_MSC_VER) && !defined(_WIN32_WINNT) +# define _WIN32_WINNT 0x0502 +# endif #define WIN32_LEAN_AND_MEAN /* stops windows.h including winsock.h */ #include <winsock2.h> #include <windows.h> +#define GIT_WINDOWS_NATIVE #endif #include <unistd.h> @@ -79,23 +105,40 @@ #include <stdlib.h> #include <stdarg.h> #include <string.h> +#ifdef HAVE_STRINGS_H +#include <strings.h> /* for strcasecmp() */ +#endif #include <errno.h> #include <limits.h> +#ifdef NEEDS_SYS_PARAM_H #include <sys/param.h> +#endif #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> -#ifndef __MINGW32__ -#include <sys/wait.h> +#include <syslog.h> +#ifndef NO_SYS_POLL_H #include <sys/poll.h> +#else +#include <poll.h> +#endif + +#if defined(__MINGW32__) +/* pull in Windows compatibility stuff */ +#include "compat/mingw.h" +#elif defined(_MSC_VER) +#include "compat/msvc.h" +#else +#include <sys/wait.h> +#include <sys/resource.h> #include <sys/socket.h> #include <sys/ioctl.h> +#include <termios.h> #ifndef NO_SYS_SELECT_H #include <sys/select.h> #endif @@ -104,23 +147,57 @@ #include <arpa/inet.h> #include <netdb.h> #include <pwd.h> +#include <sys/un.h> +#ifndef NO_INTTYPES_H #include <inttypes.h> +#else +#include <stdint.h> +#endif +#ifdef NO_INTPTR_T +/* + * On I16LP32, ILP32 and LP64 "long" is the save bet, however + * on LLP86, IL33LLP64 and P64 it needs to be "long long", + * while on IP16 and IP16L32 it is "int" (resp. "short") + * Size needs to match (or exceed) 'sizeof(void *)'. + * We can't take "long long" here as not everybody has it. + */ +typedef long intptr_t; +typedef unsigned long uintptr_t; +#endif #if defined(__CYGWIN__) #undef _XOPEN_SOURCE #include <grp.h> #define _XOPEN_SOURCE 600 -#include "compat/cygwin.h" #else #undef _ALL_SOURCE /* AIX 5.3L defines a struct list with _ALL_SOURCE. */ #include <grp.h> #define _ALL_SOURCE 1 #endif -#else /* __MINGW32__ */ -/* pull in Windows compatibility stuff */ -#include "compat/mingw.h" -#endif /* __MINGW32__ */ -#ifdef _MSC_VER -#include "compat/msvc.h" +#endif + +/* used on Mac OS X */ +#ifdef PRECOMPOSE_UNICODE +#include "compat/precompose_utf8.h" +#else +#define precompose_str(in,i_nfd2nfc) +#define precompose_argv(c,v) +#define probe_utf8_pathname_composition(a,b) +#endif + +#ifdef MKDIR_WO_TRAILING_SLASH +#define mkdir(a,b) compat_mkdir_wo_trailing_slash((a),(b)) +extern int compat_mkdir_wo_trailing_slash(const char*, mode_t); +#endif + +#ifdef NO_STRUCT_ITIMERVAL +struct itimerval { + struct timeval it_interval; + struct timeval it_value; +}; +#endif + +#ifdef NO_SETITIMER +#define setitimer(which,value,ovalue) #endif #ifndef NO_LIBGEN_H @@ -135,8 +212,26 @@ extern char *gitbasename(char *); #endif #ifndef NO_OPENSSL +#define __AVAILABILITY_MACROS_USES_AVAILABILITY 0 +#define MAC_OS_X_VERSION_MIN_REQUIRED MAC_OS_X_VERSION_10_6 #include <openssl/ssl.h> #include <openssl/err.h> +#undef MAC_OS_X_VERSION_MIN_REQUIRED +#undef __AVAILABILITY_MACROS_USES_AVAILABILITY +#ifdef NO_HMAC_CTX_CLEANUP +#define HMAC_CTX_cleanup HMAC_cleanup +#endif +#endif + +/* On most systems <netdb.h> would have given us this, but + * not on some systems (e.g. z/OS). + */ +#ifndef NI_MAXHOST +#define NI_MAXHOST 1025 +#endif + +#ifndef NI_MAXSERV +#define NI_MAXSERV 32 #endif /* On most systems <limits.h> would have given us this, but @@ -158,51 +253,189 @@ extern char *gitbasename(char *); #define PRIx32 "x" #endif +#ifndef PRIo32 +#define PRIo32 "o" +#endif + #ifndef PATH_SEP #define PATH_SEP ':' #endif +#ifdef HAVE_PATHS_H +#include <paths.h> +#endif +#ifndef _PATH_DEFPATH +#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin" +#endif + #ifndef STRIP_EXTENSION #define STRIP_EXTENSION "" #endif #ifndef has_dos_drive_prefix -#define has_dos_drive_prefix(path) 0 +static inline int git_has_dos_drive_prefix(const char *path) +{ + return 0; +} +#define has_dos_drive_prefix git_has_dos_drive_prefix #endif #ifndef is_dir_sep -#define is_dir_sep(c) ((c) == '/') +static inline int git_is_dir_sep(int c) +{ + return c == '/'; +} +#define is_dir_sep git_is_dir_sep #endif -#ifdef __GNUC__ +#ifndef offset_1st_component +static inline int git_offset_1st_component(const char *path) +{ + return is_dir_sep(path[0]); +} +#define offset_1st_component git_offset_1st_component +#endif + +#ifndef find_last_dir_sep +static inline char *git_find_last_dir_sep(const char *path) +{ + return strrchr(path, '/'); +} +#define find_last_dir_sep git_find_last_dir_sep +#endif + +#if defined(__HP_cc) && (__HP_cc >= 61000) +#define NORETURN __attribute__((noreturn)) +#define NORETURN_PTR +#elif defined(__GNUC__) && !defined(NO_NORETURN) #define NORETURN __attribute__((__noreturn__)) #define NORETURN_PTR __attribute__((__noreturn__)) +#elif defined(_MSC_VER) +#define NORETURN __declspec(noreturn) +#define NORETURN_PTR #else #define NORETURN #define NORETURN_PTR +#ifndef __GNUC__ #ifndef __attribute__ #define __attribute__(x) #endif #endif +#endif + +/* The sentinel attribute is valid from gcc version 4.0 */ +#if defined(__GNUC__) && (__GNUC__ >= 4) +#define LAST_ARG_MUST_BE_NULL __attribute__((sentinel)) +#else +#define LAST_ARG_MUST_BE_NULL +#endif #include "compat/bswap.h" +#include "wildmatch.h" + +struct strbuf; + /* General helper functions */ +extern void vreportf(const char *prefix, const char *err, va_list params); +extern void vwritef(int fd, const char *prefix, const char *err, va_list params); extern NORETURN void usage(const char *err); +extern NORETURN void usagef(const char *err, ...) __attribute__((format (printf, 1, 2))); extern NORETURN void die(const char *err, ...) __attribute__((format (printf, 1, 2))); extern NORETURN void die_errno(const char *err, ...) __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))); +#ifndef NO_OPENSSL +#ifdef APPLE_COMMON_CRYPTO +#include "compat/apple-common-crypto.h" +#else +#include <openssl/evp.h> +#include <openssl/hmac.h> +#endif /* APPLE_COMMON_CRYPTO */ +#include <openssl/x509v3.h> +#endif /* NO_OPENSSL */ + +/* + * Let callers be aware of the constant return value; this can help + * gcc with -Wuninitialized analysis. We restrict this trick to gcc, though, + * because some compilers may not support variadic macros. Since we're only + * trying to help gcc, anyway, it's OK; other compilers will fall back to + * using the function as usual. + */ +#if defined(__GNUC__) +static inline int const_error(void) +{ + return -1; +} +#define error(...) (error(__VA_ARGS__), const_error()) +#endif + extern void set_die_routine(NORETURN_PTR void (*routine)(const char *err, va_list params)); +extern void set_error_routine(void (*routine)(const char *err, va_list params)); +extern void set_die_is_recursing_routine(int (*routine)(void)); + +extern int starts_with(const char *str, const char *prefix); + +/* + * If the string "str" begins with the string found in "prefix", return 1. + * The "out" parameter is set to "str + strlen(prefix)" (i.e., to the point in + * the string right after the prefix). + * + * Otherwise, return 0 and leave "out" untouched. + * + * Examples: + * + * [extract branch name, fail if not a branch] + * if (!skip_prefix(ref, "refs/heads/", &branch) + * return -1; + * + * [skip prefix if present, otherwise use whole string] + * skip_prefix(name, "refs/heads/", &name); + */ +static inline int skip_prefix(const char *str, const char *prefix, + const char **out) +{ + do { + if (!*prefix) { + *out = str; + return 1; + } + } while (*str++ == *prefix++); + return 0; +} -extern int prefixcmp(const char *str, const char *prefix); -extern time_t tm_to_time_t(const struct tm *tm); +/* + * If buf ends with suffix, return 1 and subtract the length of the suffix + * from *len. Otherwise, return 0 and leave *len untouched. + */ +static inline int strip_suffix_mem(const char *buf, size_t *len, + const char *suffix) +{ + size_t suflen = strlen(suffix); + if (*len < suflen || memcmp(buf + (*len - suflen), suffix, suflen)) + return 0; + *len -= suflen; + return 1; +} + +/* + * If str ends with suffix, return 1 and set *len to the size of the string + * without the suffix. Otherwise, return 0 and set *len to the size of the + * string. + * + * Note that we do _not_ NUL-terminate str to the new length. + */ +static inline int strip_suffix(const char *str, const char *suffix, size_t *len) +{ + *len = strlen(str); + return strip_suffix_mem(str, len, suffix); +} -static inline const char *skip_prefix(const char *str, const char *prefix) +static inline int ends_with(const char *str, const char *suffix) { - size_t len = strlen(prefix); - return strncmp(str, prefix, len) ? NULL : str + len; + size_t len; + return strip_suffix(str, suffix, &len); } #if defined(NO_MMAP) || defined(USE_WIN32_MMAP) @@ -211,7 +444,6 @@ static inline const char *skip_prefix(const char *str, const char *prefix) #define PROT_READ 1 #define PROT_WRITE 2 #define MAP_PRIVATE 1 -#define MAP_FAILED ((void*)-1) #endif #define mmap git_mmap @@ -240,12 +472,50 @@ extern int git_munmap(void *start, size_t length); #endif /* NO_MMAP */ +#ifndef MAP_FAILED +#define MAP_FAILED ((void *)-1) +#endif + #ifdef NO_ST_BLOCKS_IN_STRUCT_STAT #define on_disk_bytes(st) ((st).st_size) #else #define on_disk_bytes(st) ((st).st_blocks * 512) #endif +#ifdef NEEDS_MODE_TRANSLATION +#undef S_IFMT +#undef S_IFREG +#undef S_IFDIR +#undef S_IFLNK +#undef S_IFBLK +#undef S_IFCHR +#undef S_IFIFO +#undef S_IFSOCK +#define S_IFMT 0170000 +#define S_IFREG 0100000 +#define S_IFDIR 0040000 +#define S_IFLNK 0120000 +#define S_IFBLK 0060000 +#define S_IFCHR 0020000 +#define S_IFIFO 0010000 +#define S_IFSOCK 0140000 +#ifdef stat +#undef stat +#endif +#define stat(path, buf) git_stat(path, buf) +extern int git_stat(const char *, struct stat *); +#ifdef fstat +#undef fstat +#endif +#define fstat(fd, buf) git_fstat(fd, buf) +extern int git_fstat(int, struct stat *); +#ifdef lstat +#undef lstat +#endif +#define lstat(path, buf) git_lstat(path, buf) +extern int git_lstat(const char *, struct stat *); +#endif + #define DEFAULT_PACKED_GIT_LIMIT \ ((1024L * 1024L) * (sizeof(void*) >= 8 ? 8192 : 256)) @@ -293,6 +563,8 @@ extern size_t gitstrlcpy(char *, const char *, size_t); #ifdef NO_STRTOUMAX #define strtoumax gitstrtoumax extern uintmax_t gitstrtoumax(const char *, char **, int); +#define strtoimax gitstrtoimax +extern intmax_t gitstrtoimax(const char *, char **, int); #endif #ifdef NO_HSTRERROR @@ -306,6 +578,10 @@ void *gitmemmem(const void *haystack, size_t haystacklen, const void *needle, size_t needlelen); #endif +#ifdef NO_GETPAGESIZE +#define getpagesize() sysconf(_SC_PAGESIZE) +#endif + #ifdef FREAD_READS_DIRECTORIES #ifdef fopen #undef fopen @@ -315,9 +591,15 @@ extern FILE *git_fopen(const char*, const char*); #endif #ifdef SNPRINTF_RETURNS_BOGUS +#ifdef snprintf +#undef snprintf +#endif #define snprintf git_snprintf extern int git_snprintf(char *str, size_t maxsize, const char *format, ...); +#ifdef vsnprintf +#undef vsnprintf +#endif #define vsnprintf git_vsnprintf extern int git_vsnprintf(char *str, size_t maxsize, const char *format, va_list ap); @@ -326,6 +608,7 @@ extern int git_vsnprintf(char *str, size_t maxsize, #ifdef __GLIBC_PREREQ #if __GLIBC_PREREQ(2, 1) #define HAVE_STRCHRNUL +#define HAVE_MEMPCPY #endif #endif @@ -339,10 +622,44 @@ static inline char *gitstrchrnul(const char *s, int c) } #endif -extern void release_pack_memory(size_t, int); +#ifndef HAVE_MEMPCPY +#define mempcpy gitmempcpy +static inline void *gitmempcpy(void *dest, const void *src, size_t n) +{ + return (char *)memcpy(dest, src, n) + n; +} +#endif + +#ifdef NO_INET_PTON +int inet_pton(int af, const char *src, void *dst); +#endif + +#ifdef NO_INET_NTOP +const char *inet_ntop(int af, const void *src, char *dst, size_t size); +#endif + +#ifdef NO_PTHREADS +#define atexit git_atexit +extern int git_atexit(void (*handler)(void)); +#endif + +extern void release_pack_memory(size_t); +typedef void (*try_to_free_t)(size_t); +extern try_to_free_t set_try_to_free_routine(try_to_free_t); + +#ifdef HAVE_ALLOCA_H +# include <alloca.h> +# define xalloca(size) (alloca(size)) +# define xalloca_free(p) do {} while (0) +#else +# define xalloca(size) (xmalloc(size)) +# define xalloca_free(p) (free(p)) +#endif extern char *xstrdup(const char *str); extern void *xmalloc(size_t size); +extern void *xmallocz(size_t size); +extern void *xmallocz_gently(size_t size); extern void *xmemdupz(const void *data, size_t len); extern char *xstrndup(const char *str, size_t len); extern void *xrealloc(void *ptr, size_t size); @@ -350,48 +667,74 @@ extern void *xcalloc(size_t nmemb, size_t size); extern void *xmmap(void *start, size_t length, int prot, int flags, int fd, off_t offset); extern ssize_t xread(int fd, void *buf, size_t len); extern ssize_t xwrite(int fd, const void *buf, size_t len); +extern ssize_t xpread(int fd, void *buf, size_t len, off_t offset); extern int xdup(int fd); extern FILE *xfdopen(int fd, const char *mode); extern int xmkstemp(char *template); +extern int xmkstemp_mode(char *template, int mode); extern int odb_mkstemp(char *template, size_t limit, const char *pattern); -extern int odb_pack_keep(char *name, size_t namesz, unsigned char *sha1); +extern int odb_pack_keep(char *name, size_t namesz, const unsigned char *sha1); +extern char *xgetcwd(void); -static inline size_t xsize_t(off_t len) +#define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), (alloc) * sizeof(*(x))) + +static inline char *xstrdup_or_null(const char *str) { - return (size_t)len; + return str ? xstrdup(str) : NULL; } -static inline int has_extension(const char *filename, const char *ext) +static inline size_t xsize_t(off_t len) { - size_t len = strlen(filename); - size_t extlen = strlen(ext); - return len > extlen && !memcmp(filename + len - extlen, ext, extlen); + if (len > (size_t) len) + die("Cannot handle files this big"); + return (size_t)len; } +/* in ctype.c, for kwset users */ +extern const char tolower_trans_tbl[256]; + /* Sane ctype - no locale, and works with signed chars */ #undef isascii #undef isspace #undef isdigit #undef isalpha #undef isalnum +#undef isprint +#undef islower +#undef isupper #undef tolower #undef toupper -extern unsigned char sane_ctype[256]; +#undef iscntrl +#undef ispunct +#undef isxdigit + +extern const 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_PATHSPEC_MAGIC 0x20 +#define GIT_CNTRL 0x40 +#define GIT_PUNCT 0x80 #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 isalpha(x) sane_istest(x,GIT_ALPHA) #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) +#define isprint(x) ((x) >= 0x20 && (x) <= 0x7e) +#define islower(x) sane_iscase(x, 1) +#define isupper(x) sane_iscase(x, 0) #define is_glob_special(x) sane_istest(x,GIT_GLOB_SPECIAL) #define is_regex_special(x) sane_istest(x,GIT_GLOB_SPECIAL | GIT_REGEX_SPECIAL) +#define iscntrl(x) (sane_istest(x,GIT_CNTRL)) +#define ispunct(x) sane_istest(x, GIT_PUNCT | GIT_REGEX_SPECIAL | \ + GIT_GLOB_SPECIAL | GIT_PATHSPEC_MAGIC) +#define isxdigit(x) (hexval_table[(unsigned char)(x)] != -1) #define tolower(x) sane_case((unsigned char)(x), 0x20) #define toupper(x) sane_case((unsigned char)(x), 0) +#define is_pathspec_magic(x) sane_istest(x,GIT_PATHSPEC_MAGIC) static inline int sane_case(int x, int high) { @@ -400,6 +743,17 @@ static inline int sane_case(int x, int high) return x; } +static inline int sane_iscase(int x, int is_lower) +{ + if (!sane_istest(x, GIT_ALPHA)) + return 0; + + if (is_lower) + return (x & 0x20) != 0; + else + return (x & 0x20) == 0; +} + static inline int strtoul_ui(char const *s, int base, unsigned int *result) { unsigned long ul; @@ -458,10 +812,67 @@ void git_qsort(void *base, size_t nmemb, size_t size, #define fstat_is_reliable() 1 #endif +#ifndef va_copy +/* + * Since an obvious implementation of va_list would be to make it a + * pointer into the stack frame, a simple assignment will work on + * many systems. But let's try to be more portable. + */ +#ifdef __va_copy +#define va_copy(dst, src) __va_copy(dst, src) +#else +#define va_copy(dst, src) ((dst) = (src)) +#endif +#endif + +#if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__C99_MACRO_WITH_VA_ARGS) +#define HAVE_VARIADIC_MACROS 1 +#endif + /* * Preserves errno, prints a message, but gives no warning for ENOENT. - * Always returns the return value of unlink(2). + * Returns 0 on success, which includes trying to unlink an object that does + * not exist. */ int unlink_or_warn(const char *path); + /* + * Tries to unlink file. Returns 0 if unlink succeeded + * or the file already didn't exist. Returns -1 and + * appends a message to err suitable for + * 'error("%s", err->buf)' on error. + */ +int unlink_or_msg(const char *file, struct strbuf *err); +/* + * Preserves errno, prints a message, but gives no warning for ENOENT. + * Returns 0 on success, which includes trying to remove a directory that does + * not exist. + */ +int rmdir_or_warn(const char *path); +/* + * Calls the correct function out of {unlink,rmdir}_or_warn based on + * the supplied file mode. + */ +int remove_or_warn(unsigned int mode, const char *path); + +/* + * Call access(2), but warn for any error except "missing file" + * (ENOENT or ENOTDIR). + */ +#define ACCESS_EACCES_OK (1U << 0) +int access_or_warn(const char *path, int mode, unsigned flag); +int access_or_die(const char *path, int mode, unsigned flag); + +/* Warn on an inaccessible file that ought to be accessible */ +void warn_on_inaccessible(const char *path); + +/* Get the passwd entry for the UID of the current process. */ +struct passwd *xgetpwuid_self(void); + +#ifdef GMTIME_UNRELIABLE_ERRORS +struct tm *git_gmtime(const time_t *); +struct tm *git_gmtime_r(const time_t *, struct tm *); +#define gmtime git_gmtime +#define gmtime_r git_gmtime_r +#endif #endif |