blob: a801746931e4d4f214c20363750c93c403029a55 [file] [log] [blame]
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#include "platform/globals.h"
#if defined(HOST_OS_MACOS)
#include "platform/utils.h"
#include <errno.h> // NOLINT
#include <sys/utsname.h> // NOLINT
namespace dart {
char* Utils::StrNDup(const char* s, intptr_t n) {
// strndup has only been added to Mac OS X in 10.7. We are supplying
// our own copy here if needed.
#if !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) || \
__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ <= 1060
intptr_t len = strlen(s);
if ((n < 0) || (len < 0)) {
return NULL;
}
if (n < len) {
len = n;
}
char* result = reinterpret_cast<char*>(malloc(len + 1));
result[len] = '\0';
return reinterpret_cast<char*>(memmove(result, s, len));
#else // !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) || ...
return strndup(s, n);
#endif // !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) || ...
}
char* Utils::StrDup(const char* s) {
return strdup(s);
}
intptr_t Utils::StrNLen(const char* s, intptr_t n) {
// strnlen has only been added to Mac OS X in 10.7. We are supplying
// our own copy here if needed.
#if !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) || \
__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ <= 1060
intptr_t len = 0;
while ((len <= n) && (*s != '\0')) {
s++;
len++;
}
return len;
#else // !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) || ...
return strnlen(s, n);
#endif // !defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) || ...
}
int Utils::SNPrint(char* str, size_t size, const char* format, ...) {
va_list args;
va_start(args, format);
int retval = VSNPrint(str, size, format, args);
va_end(args);
return retval;
}
int Utils::VSNPrint(char* str, size_t size, const char* format, va_list args) {
int retval = vsnprintf(str, size, format, args);
if (retval < 0) {
FATAL1("Fatal error in Utils::VSNPrint with format '%s'", format);
}
return retval;
}
int Utils::Close(int fildes) {
return close(fildes);
}
size_t Utils::Read(int filedes, void* buf, size_t nbyte) {
return read(filedes, buf, nbyte);
}
int Utils::Unlink(const char* path) {
return unlink(path);
}
namespace internal {
// Returns the running system's Darwin major version. Don't call this, it's
// an implementation detail and its result is meant to be cached by
// MacOSXMinorVersion.
int32_t DarwinMajorVersionInternal() {
// uname is implemented as a simple series of sysctl system calls to
// obtain the relevant data from the kernel. The data is
// compiled right into the kernel, so no threads or blocking or other
// funny business is necessary.
struct utsname uname_info;
if (uname(&uname_info) != 0) {
FATAL("Fatal error in DarwinMajorVersionInternal : invalid return uname");
return 0;
}
if (strcmp(uname_info.sysname, "Darwin") != 0) {
FATAL1(
"Fatal error in DarwinMajorVersionInternal : unexpected uname"
" sysname '%s'",
uname_info.sysname);
return 0;
}
int32_t darwin_major_version = 0;
char* dot = strchr(uname_info.release, '.');
if (dot) {
errno = 0;
char* end_ptr = NULL;
darwin_major_version = strtol(uname_info.release, &end_ptr, 10);
if (errno != 0 || (end_ptr == uname_info.release)) {
dot = NULL;
}
}
if (!dot) {
FATAL1(
"Fatal error in DarwinMajorVersionInternal :"
" could not parse uname release '%s'",
uname_info.release);
return 0;
}
return darwin_major_version;
}
// Returns the running system's Mac OS X minor version. This is the |y| value
// in 10.y or 10.y.z. Don't call this, it's an implementation detail and the
// result is meant to be cached by MacOSXMinorVersion.
int32_t MacOSXMinorVersionInternal() {
int darwin_major_version = DarwinMajorVersionInternal();
// The Darwin major version is always 4 greater than the Mac OS X minor
// version for Darwin versions beginning with 6, corresponding to Mac OS X
// 10.2. Since this correspondence may change in the future, warn when
// encountering a version higher than anything seen before. Older Darwin
// versions, or versions that can't be determined, result in
// immediate death.
ASSERT(darwin_major_version >= 6);
return (darwin_major_version - 4);
}
int32_t MacOSXMinorVersion() {
static int mac_os_x_minor_version = MacOSXMinorVersionInternal();
return mac_os_x_minor_version;
}
} // namespace internal
} // namespace dart
#endif // defined(HOST_OS_MACOS)