summaryrefslogtreecommitdiff
path: root/git-compat-util.h
diff options
context:
space:
mode:
Diffstat (limited to 'git-compat-util.h')
-rw-r--r--git-compat-util.h817
1 files changed, 775 insertions, 42 deletions
diff --git a/git-compat-util.h b/git-compat-util.h
index 079cbe9440..8a4a3f85e7 100644
--- a/git-compat-util.h
+++ b/git-compat-util.h
@@ -3,11 +3,28 @@
#define _FILE_OFFSET_BITS 64
+
+/* Derived from Linux "Features Test Macro" header
+ * Convenience macros to test the versions of gcc (or
+ * a compatible compiler).
+ * Use them like this:
+ * #if GIT_GNUC_PREREQ (2,8)
+ * ... code requiring gcc 2.8 or later ...
+ * #endif
+*/
+#if defined(__GNUC__) && defined(__GNUC_MINOR__)
+# define GIT_GNUC_PREREQ(maj, min) \
+ ((__GNUC__ << 16) + __GNUC_MINOR__ >= ((maj) << 16) + (min))
+#else
+ #define GIT_GNUC_PREREQ(maj, min) 0
+#endif
+
+
#ifndef FLEX_ARRAY
/*
* See if our compiler is known to support flexible array members.
*/
-#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
+#if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && (!defined(__SUNPRO_C) || (__SUNPRO_C > 0x580))
# define FLEX_ARRAY /* empty */
#elif defined(__GNUC__)
# if (__GNUC__ >= 3)
@@ -25,7 +42,67 @@
#endif
#endif
-#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
+
+/*
+ * BUILD_ASSERT_OR_ZERO - assert a build-time dependency, as an expression.
+ * @cond: the compile-time condition which must be true.
+ *
+ * Your compile will fail if the condition isn't true, or can't be evaluated
+ * by the compiler. This can be used in an expression: its value is "0".
+ *
+ * Example:
+ * #define foo_to_char(foo) \
+ * ((char *)(foo) \
+ * + BUILD_ASSERT_OR_ZERO(offsetof(struct foo, string) == 0))
+ */
+#define BUILD_ASSERT_OR_ZERO(cond) \
+ (sizeof(char [1 - 2*!(cond)]) - 1)
+
+#if GIT_GNUC_PREREQ(3, 1)
+ /* &arr[0] degrades to a pointer: a different type from an array */
+# define BARF_UNLESS_AN_ARRAY(arr) \
+ BUILD_ASSERT_OR_ZERO(!__builtin_types_compatible_p(__typeof__(arr), \
+ __typeof__(&(arr)[0])))
+#else
+# define BARF_UNLESS_AN_ARRAY(arr) 0
+#endif
+/*
+ * ARRAY_SIZE - get the number of elements in a visible array
+ * <at> x: the array whose size you want.
+ *
+ * This does not work on pointers, or arrays declared as [], or
+ * function parameters. With correct compiler support, such usage
+ * will cause a build error (see the build_assert_or_zero macro).
+ */
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]) + BARF_UNLESS_AN_ARRAY(x))
+
+#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))
+
+/*
+ * Returns true if the multiplication of "a" and "b" will
+ * overflow. The types of "a" and "b" must match and must be unsigned.
+ * Note that this macro evaluates "a" twice!
+ */
+#define unsigned_mult_overflows(a, b) \
+ ((a) && (b) > maximum_unsigned_value_of_type(a) / (a))
#ifdef __GNUC__
#define TYPEOF(x) (__typeof__(x))
@@ -33,19 +110,50 @@
#define TYPEOF(x)
#endif
-#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (sizeof(x) * 8 - (bits))))
+#define MSB(x, bits) ((x) & TYPEOF(x)(~0ULL << (bitsizeof(x) - (bits))))
#define HAS_MULTI_BITS(i) ((i) & ((i) - 1)) /* checks if an integer has more than 1 bit set */
+#define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
+
/* 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__) && !defined(__USLC__) && !defined(_M_UNIX)
+#if defined(__sun__)
+ /*
+ * On Solaris, when _XOPEN_EXTENDED is set, its header file
+ * forces the programs to be XPG4v2, defeating any _XOPEN_SOURCE
+ * setting to say we are XPG5 or XPG6. Also on Solaris,
+ * XPG6 programs must be compiled with a c99 compiler, while
+ * non XPG6 programs must be compiled with a pre-c99 compiler.
+ */
+# if __STDC_VERSION__ - 0 >= 199901L
+# define _XOPEN_SOURCE 600
+# else
+# define _XOPEN_SOURCE 500
+# endif
+#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
+
+#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>
#include <stdio.h>
@@ -55,23 +163,44 @@
#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
+#ifdef HAVE_BSD_SYSCTL
+#include <sys/sysctl.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/utsname.h>
+#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
@@ -80,31 +209,89 @@
#include <arpa/inet.h>
#include <netdb.h>
#include <pwd.h>
+#include <sys/un.h>
+#ifndef NO_INTTYPES_H
#include <inttypes.h>
-#if defined(__CYGWIN__)
-#undef _XOPEN_SOURCE
-#include <grp.h>
-#define _XOPEN_SOURCE 600
-#include "compat/cygwin.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
#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__ */
+
+/* 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()
+#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
+#include <libgen.h>
+#else
+#define basename gitbasename
+extern char *gitbasename(char *);
+#define dirname gitdirname
+extern char *gitdirname(char *);
+#endif
#ifndef NO_ICONV
#include <iconv.h>
#endif
#ifndef NO_OPENSSL
+#ifdef __APPLE__
+#define __AVAILABILITY_MACROS_USES_AVAILABILITY 0
+#include <AvailabilityMacros.h>
+#undef DEPRECATED_ATTRIBUTE
+#define DEPRECATED_ATTRIBUTE
+#undef __AVAILABILITY_MACROS_USES_AVAILABILITY
+#endif
#include <openssl/ssl.h>
#include <openssl/err.h>
#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
* not on some systems (e.g. GNU/Hurd).
*/
@@ -116,6 +303,10 @@
#define PRIuMAX "llu"
#endif
+#ifndef SCNuMAX
+#define SCNuMAX PRIuMAX
+#endif
+
#ifndef PRIu32
#define PRIu32 "u"
#endif
@@ -124,55 +315,234 @@
#define PRIx32 "x"
#endif
+#ifndef PRIo32
+#define PRIo32 "o"
+#endif
+
#ifndef PATH_SEP
#define PATH_SEP ':'
#endif
-#ifndef STRIP_EXTENSION
-#define STRIP_EXTENSION ""
+#ifdef HAVE_PATHS_H
+#include <paths.h>
+#endif
+#ifndef _PATH_DEFPATH
+#define _PATH_DEFPATH "/usr/local/bin:/usr/bin:/bin"
#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 skip_dos_drive_prefix
+static inline int git_skip_dos_drive_prefix(char **path)
+{
+ return 0;
+}
+#define skip_dos_drive_prefix git_skip_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 usage(const char *err) NORETURN;
-extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
+extern void vreportf(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 int error_errno(const char *err, ...) __attribute__((format (printf, 1, 2)));
extern void warning(const char *err, ...) __attribute__((format (printf, 1, 2)));
+extern void warning_errno(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())
+#define error_errno(...) (error_errno(__VA_ARGS__), const_error())
+#endif
-extern void set_die_routine(void (*routine)(const char *err, va_list params) NORETURN);
+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 (*get_error_routine(void))(const char *err, va_list params);
+extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
+extern void (*get_warn_routine(void))(const char *warn, va_list params);
+extern void set_die_is_recursing_routine(int (*routine)(void));
+extern void set_error_handle(FILE *);
-extern int prefixcmp(const char *str, const char *prefix);
-extern time_t tm_to_time_t(const struct tm *tm);
+extern int starts_with(const char *str, const char *prefix);
-static inline const char *skip_prefix(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)
{
- size_t len = strlen(prefix);
- return strncmp(str, prefix, len) ? NULL : str + len;
+ do {
+ if (!*prefix) {
+ *out = str;
+ return 1;
+ }
+ } while (*str++ == *prefix++);
+ return 0;
}
-#ifdef NO_MMAP
+/*
+ * Like skip_prefix, but promises never to read past "len" bytes of the input
+ * buffer, and returns the remaining number of bytes in "out" via "outlen".
+ */
+static inline int skip_prefix_mem(const char *buf, size_t len,
+ const char *prefix,
+ const char **out, size_t *outlen)
+{
+ size_t prefix_len = strlen(prefix);
+ if (prefix_len <= len && !memcmp(buf, prefix, prefix_len)) {
+ *out = buf + prefix_len;
+ *outlen = len - prefix_len;
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * 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 int ends_with(const char *str, const char *suffix)
+{
+ size_t len;
+ return strip_suffix(str, suffix, &len);
+}
+
+#define SWAP(a, b) do { \
+ void *_swap_a_ptr = &(a); \
+ void *_swap_b_ptr = &(b); \
+ unsigned char _swap_buffer[sizeof(a)]; \
+ memcpy(_swap_buffer, _swap_a_ptr, sizeof(a)); \
+ memcpy(_swap_a_ptr, _swap_b_ptr, sizeof(a) + \
+ BUILD_ASSERT_OR_ZERO(sizeof(a) == sizeof(b))); \
+ memcpy(_swap_b_ptr, _swap_buffer, sizeof(a)); \
+} while (0)
+
+#if defined(NO_MMAP) || defined(USE_WIN32_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
@@ -180,13 +550,19 @@ static inline const char *skip_prefix(const char *str, const char *prefix)
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);
+#else /* NO_MMAP || USE_WIN32_MMAP */
+
+#include <sys/mman.h>
+
+#endif /* NO_MMAP || USE_WIN32_MMAP */
+
+#ifdef NO_MMAP
+
/* 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 \
@@ -195,14 +571,52 @@ 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))
+ ((1024L * 1024L) * (size_t)(sizeof(void*) >= 8 ? 8192 : 256))
#ifdef NO_PREAD
#define pread git_pread
@@ -243,6 +657,8 @@ 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
@@ -256,6 +672,22 @@ void *gitmemmem(const void *haystack, size_t haystacklen,
const void *needle, size_t needlelen);
#endif
+#ifdef OVERRIDE_STRDUP
+#ifdef strdup
+#undef strdup
+#endif
+#define strdup gitstrdup
+char *gitstrdup(const char *s);
+#endif
+
+#ifdef NO_GETPAGESIZE
+#define getpagesize() sysconf(_SC_PAGESIZE)
+#endif
+
+#ifndef O_CLOEXEC
+#define O_CLOEXEC 0
+#endif
+
#ifdef FREAD_READS_DIRECTORIES
#ifdef fopen
#undef fopen
@@ -265,9 +697,15 @@ 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);
@@ -289,55 +727,208 @@ static inline char *gitstrchrnul(const char *s, int c)
}
#endif
-extern void release_pack_memory(size_t, int);
+#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);
+
+static inline size_t st_add(size_t a, size_t b)
+{
+ if (unsigned_add_overflows(a, b))
+ die("size_t overflow: %"PRIuMAX" + %"PRIuMAX,
+ (uintmax_t)a, (uintmax_t)b);
+ return a + b;
+}
+#define st_add3(a,b,c) st_add(st_add((a),(b)),(c))
+#define st_add4(a,b,c,d) st_add(st_add3((a),(b),(c)),(d))
+
+static inline size_t st_mult(size_t a, size_t b)
+{
+ if (unsigned_mult_overflows(a, b))
+ die("size_t overflow: %"PRIuMAX" * %"PRIuMAX,
+ (uintmax_t)a, (uintmax_t)b);
+ return a * b;
+}
+
+static inline size_t st_sub(size_t a, size_t b)
+{
+ if (a < b)
+ die("size_t underflow: %"PRIuMAX" - %"PRIuMAX,
+ (uintmax_t)a, (uintmax_t)b);
+ return a - b;
+}
+
+#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);
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 void *xmmap_gently(void *start, size_t length, int prot, int flags, int fd, off_t offset);
+extern int xopen(const char *path, int flags, ...);
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 *xfopen(const char *path, const char *mode);
extern FILE *xfdopen(int fd, const char *mode);
extern int xmkstemp(char *template);
+extern int xmkstemp_mode(char *template, int mode);
+extern char *xgetcwd(void);
+extern FILE *fopen_for_writing(const char *path);
-static inline size_t xsize_t(off_t len)
+#define ALLOC_ARRAY(x, alloc) (x) = xmalloc(st_mult(sizeof(*(x)), (alloc)))
+#define REALLOC_ARRAY(x, alloc) (x) = xrealloc((x), st_mult(sizeof(*(x)), (alloc)))
+
+#define COPY_ARRAY(dst, src, n) copy_array((dst), (src), (n), sizeof(*(dst)) + \
+ BUILD_ASSERT_OR_ZERO(sizeof(*(dst)) == sizeof(*(src))))
+static inline void copy_array(void *dst, const void *src, size_t n, size_t size)
{
- return (size_t)len;
+ if (n)
+ memcpy(dst, src, st_mult(size, n));
+}
+
+/*
+ * These functions help you allocate structs with flex arrays, and copy
+ * the data directly into the array. For example, if you had:
+ *
+ * struct foo {
+ * int bar;
+ * char name[FLEX_ARRAY];
+ * };
+ *
+ * you can do:
+ *
+ * struct foo *f;
+ * FLEX_ALLOC_MEM(f, name, src, len);
+ *
+ * to allocate a "foo" with the contents of "src" in the "name" field.
+ * The resulting struct is automatically zero'd, and the flex-array field
+ * is NUL-terminated (whether the incoming src buffer was or not).
+ *
+ * The FLEXPTR_* variants operate on structs that don't use flex-arrays,
+ * but do want to store a pointer to some extra data in the same allocated
+ * block. For example, if you have:
+ *
+ * struct foo {
+ * char *name;
+ * int bar;
+ * };
+ *
+ * you can do:
+ *
+ * struct foo *f;
+ * FLEXPTR_ALLOC_STR(f, name, src);
+ *
+ * and "name" will point to a block of memory after the struct, which will be
+ * freed along with the struct (but the pointer can be repointed anywhere).
+ *
+ * The *_STR variants accept a string parameter rather than a ptr/len
+ * combination.
+ *
+ * Note that these macros will evaluate the first parameter multiple
+ * times, and it must be assignable as an lvalue.
+ */
+#define FLEX_ALLOC_MEM(x, flexname, buf, len) do { \
+ size_t flex_array_len_ = (len); \
+ (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \
+ memcpy((void *)(x)->flexname, (buf), flex_array_len_); \
+} while (0)
+#define FLEXPTR_ALLOC_MEM(x, ptrname, buf, len) do { \
+ size_t flex_array_len_ = (len); \
+ (x) = xcalloc(1, st_add3(sizeof(*(x)), flex_array_len_, 1)); \
+ memcpy((x) + 1, (buf), flex_array_len_); \
+ (x)->ptrname = (void *)((x)+1); \
+} while(0)
+#define FLEX_ALLOC_STR(x, flexname, str) \
+ FLEX_ALLOC_MEM((x), flexname, (str), strlen(str))
+#define FLEXPTR_ALLOC_STR(x, ptrname, str) \
+ FLEXPTR_ALLOC_MEM((x), ptrname, (str), strlen(str))
+
+static inline char *xstrdup_or_null(const char *str)
+{
+ 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;
}
+__attribute__((format (printf, 3, 4)))
+extern int xsnprintf(char *dst, size_t max, const char *fmt, ...);
+
+/* in ctype.c, for kwset users */
+extern const unsigned 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)
{
@@ -346,12 +937,26 @@ 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;
char *p;
errno = 0;
+ /* negative values would be accepted by strtoul */
+ if (strchr(s, '-'))
+ return -1;
ul = strtoul(s, &p, base);
if (errno || *p || p == s || (unsigned int) ul != ul)
return -1;
@@ -378,10 +983,138 @@ void git_qsort(void *base, size_t nmemb, size_t size,
#define qsort git_qsort
#endif
+#define QSORT(base, n, compar) sane_qsort((base), (n), sizeof(*(base)), compar)
+static inline void sane_qsort(void *base, size_t nmemb, size_t size,
+ int(*compar)(const void *, const void *))
+{
+ if (nmemb > 1)
+ qsort(base, nmemb, size, compar);
+}
+
+#ifndef HAVE_ISO_QSORT_S
+int git_qsort_s(void *base, size_t nmemb, size_t size,
+ int (*compar)(const void *, const void *, void *), void *ctx);
+#define qsort_s git_qsort_s
+#endif
+
+#define QSORT_S(base, n, compar, ctx) do { \
+ if (qsort_s((base), (n), sizeof(*(base)), compar, ctx)) \
+ die("BUG: qsort_s() failed"); \
+} while (0)
+
+#ifndef REG_STARTEND
+#error "Git requires REG_STARTEND support. Compile with NO_REGEX=NeedsStartEnd"
+#endif
+
+static inline int regexec_buf(const regex_t *preg, const char *buf, size_t size,
+ size_t nmatch, regmatch_t pmatch[], int eflags)
+{
+ assert(nmatch > 0 && pmatch);
+ pmatch[0].rm_so = 0;
+ pmatch[0].rm_eo = size;
+ return regexec(preg, buf, nmatch, pmatch, eflags | REG_STARTEND);
+}
+
#ifndef DIR_HAS_BSD_GROUP_SEMANTICS
# define FORCE_DIR_SET_GID S_ISGID
#else
# define FORCE_DIR_SET_GID 0
#endif
+#ifdef NO_NSEC
+#undef USE_NSEC
+#define ST_CTIME_NSEC(st) 0
+#define ST_MTIME_NSEC(st) 0
+#else
+#ifdef USE_ST_TIMESPEC
+#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctimespec.tv_nsec))
+#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtimespec.tv_nsec))
+#else
+#define ST_CTIME_NSEC(st) ((unsigned int)((st).st_ctim.tv_nsec))
+#define ST_MTIME_NSEC(st) ((unsigned int)((st).st_mtim.tv_nsec))
+#endif
+#endif
+
+#ifdef UNRELIABLE_FSTAT
+#define fstat_is_reliable() 0
+#else
+#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.
+ * 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);
+
+#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
+
+#if !defined(USE_PARENS_AROUND_GETTEXT_N) && defined(__GNUC__)
+#define USE_PARENS_AROUND_GETTEXT_N 1
+#endif
+
+#ifndef SHELL_PATH
+# define SHELL_PATH "/bin/sh"
+#endif
+
+#ifndef _POSIX_THREAD_SAFE_FUNCTIONS
+#define flockfile(fh)
+#define funlockfile(fh)
+#define getc_unlocked(fh) getc(fh)
+#endif
+
+extern int cmd_main(int, const char **);
+
#endif