adb: move adb_strerror to sysdeps/win32/errno.cpp. (4fba3d26) · Commits · e / os / android_system_core

adb/Android.mk

+2 −0

Original line number	Original line	Diff line number	Diff line
	@@ -89,10 +89,12 @@ LIBADB_linux_SRC_FILES := \

	LIBADB_windows_SRC_FILES := \		LIBADB_windows_SRC_FILES := \
	sysdeps_win32.cpp \		sysdeps_win32.cpp \
			sysdeps/win32/errno.cpp \
	sysdeps/win32/stat.cpp \		sysdeps/win32/stat.cpp \
	usb_windows.cpp \		usb_windows.cpp \

	LIBADB_TEST_windows_SRCS := \		LIBADB_TEST_windows_SRCS := \
			sysdeps/win32/errno_test.cpp \
	sysdeps_win32_test.cpp \		sysdeps_win32_test.cpp \

	include $(CLEAR_VARS)		include $(CLEAR_VARS)

adb/file_sync_client.cpp

+0 −2

Original line number	Original line	Diff line number	Diff line
	@@ -15,12 +15,10 @@
	*/		*/

	#include <dirent.h>		#include <dirent.h>
	#include <errno.h>
	#include <inttypes.h>		#include <inttypes.h>
	#include <limits.h>		#include <limits.h>
	#include <stdio.h>		#include <stdio.h>
	#include <stdlib.h>		#include <stdlib.h>
	#include <string.h>
	#include <sys/stat.h>		#include <sys/stat.h>
	#include <sys/time.h>		#include <sys/time.h>
	#include <sys/types.h>		#include <sys/types.h>

adb/sysdeps.h

+1 −3

Original line number	Original line	Diff line number	Diff line
	@@ -34,6 +34,7 @@
	#include <android-base/unique_fd.h>		#include <android-base/unique_fd.h>
	#include <android-base/utf8.h>		#include <android-base/utf8.h>

			#include "sysdeps/errno.h"
	#include "sysdeps/stat.h"		#include "sysdeps/stat.h"

	/*		/*
	@@ -361,9 +362,6 @@ inline void seekdir(DIR*, long) {

	#define getcwd adb_getcwd		#define getcwd adb_getcwd

	char* adb_strerror(int err);
	#define strerror adb_strerror

	// Helper class to convert UTF-16 argv from wmain() to UTF-8 args that can be		// Helper class to convert UTF-16 argv from wmain() to UTF-8 args that can be
	// passed to main().		// passed to main().
	class NarrowArgs {		class NarrowArgs {

adb/sysdeps/errno.h

+9 −0

Original line number	Original line	Diff line number	Diff line
	@@ -16,4 +16,13 @@

	#pragma once		#pragma once

			#include <errno.h>
			#include <string.h>

			// Translate an errno value from linux to the host equivalent.
	int translate_linux_errno(int error);		int translate_linux_errno(int error);

			#if defined(_WIN32)
			char* adb_strerror(int err);
			#define strerror adb_strerror
			#endif

adb/sysdeps/win32/errno.cpp

0 → 100644

+95 −0

Original line number	Original line	Diff line number	Diff line
			/*
			* Copyright (C) 2016 The Android Open Source Project
			*
			* Licensed under the Apache License, Version 2.0 (the "License");
			* you may not use this file except in compliance with the License.
			* You may obtain a copy of the License at
			*
			* http://www.apache.org/licenses/LICENSE-2.0
			*
			* Unless required by applicable law or agreed to in writing, software
			* distributed under the License is distributed on an "AS IS" BASIS,
			* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
			* See the License for the specific language governing permissions and
			* limitations under the License.
			*/

			#include "sysdeps/errno.h"

			#include <windows.h>

			#include <string>

			// Overrides strerror() to handle error codes not supported by the Windows C
			// Runtime (MSVCRT.DLL).
			char* adb_strerror(int err) {
			// sysdeps.h defines strerror to adb_strerror, but in this function, we
			// want to call the real C Runtime strerror().
			#pragma push_macro("strerror")
			#undef strerror
			const int saved_err = errno; // Save because we overwrite it later.

			// Lookup the string for an unknown error.
			char* errmsg = strerror(-1);
			const std::string unknown_error = (errmsg == nullptr) ? "" : errmsg;

			// Lookup the string for this error to see if the C Runtime has it.
			errmsg = strerror(err);
			if (errmsg != nullptr && unknown_error != errmsg) {
			// The CRT returned an error message and it is different than the error
			// message for an unknown error, so it is probably valid, so use it.
			} else {
			// Check if we have a string for this error code.
			const char* custom_msg = nullptr;
			switch (err) {
			#pragma push_macro("ERR")
			#undef ERR
			#define ERR(errnum, desc) case errnum: custom_msg = desc; break
			// These error strings are from AOSP bionic/libc/include/sys/_errdefs.h.
			// Note that these cannot be longer than 94 characters because we
			// pass this to _strerror() which has that requirement.
			ERR(ECONNRESET, "Connection reset by peer");
			ERR(EHOSTUNREACH, "No route to host");
			ERR(ENETDOWN, "Network is down");
			ERR(ENETRESET, "Network dropped connection because of reset");
			ERR(ENOBUFS, "No buffer space available");
			ERR(ENOPROTOOPT, "Protocol not available");
			ERR(ENOTCONN, "Transport endpoint is not connected");
			ERR(ENOTSOCK, "Socket operation on non-socket");
			ERR(EOPNOTSUPP, "Operation not supported on transport endpoint");
			#pragma pop_macro("ERR")
			}

			if (custom_msg != nullptr) {
			// Use _strerror() to write our string into the writable per-thread
			// buffer used by strerror()/_strerror(). _strerror() appends the
			// msg for the current value of errno, so set errno to a consistent
			// value for every call so that our code-path is always the same.
			errno = 0;
			errmsg = _strerror(custom_msg);
			const size_t custom_msg_len = strlen(custom_msg);
			// Just in case _strerror() returned a read-only string, check if
			// the returned string starts with our custom message because that
			// implies that the string is not read-only.
			if ((errmsg != nullptr) && !strncmp(custom_msg, errmsg, custom_msg_len)) {
			// _strerror() puts other text after our custom message, so
			// remove that by terminating after our message.
			errmsg[custom_msg_len] = '\0';
			} else {
			// For some reason nullptr was returned or a pointer to a
			// read-only string was returned, so fallback to whatever
			// strerror() can muster (probably "Unknown error" or some
			// generic CRT error string).
			errmsg = strerror(err);
			}
			} else {
			// We don't have a custom message, so use whatever strerror(err)
			// returned earlier.
			}
			}

			errno = saved_err; // restore

			return errmsg;
			#pragma pop_macro("strerror")
			}