| /* |
| * Copyright (c) 2021, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| #include "JNIUtilities.h" |
| |
| NSString* JavaStringToNSString(JNIEnv *env, jstring jstr) { |
| if (jstr == NULL) { |
| return NULL; |
| } |
| jsize len = (*env)->GetStringLength(env, jstr); |
| const jchar *chars = (*env)->GetStringChars(env, jstr, NULL); |
| if (chars == NULL) { |
| return NULL; |
| } |
| NSString *result = [NSString stringWithCharacters:(UniChar *)chars length:len]; |
| (*env)->ReleaseStringChars(env, jstr, chars); |
| return result; |
| } |
| |
| jstring NSStringToJavaString(JNIEnv* env, NSString *str) { |
| if (str == NULL) { |
| return NULL; |
| } |
| jsize len = [str length]; |
| unichar *buffer = (unichar*)calloc(len, sizeof(unichar)); |
| if (buffer == NULL) { |
| return NULL; |
| } |
| NSRange crange = NSMakeRange(0, len); |
| [str getCharacters:buffer range:crange]; |
| jstring jStr = (*env)->NewString(env, buffer, len); |
| free(buffer); |
| CHECK_EXCEPTION(); |
| return jStr; |
| } |
| |
| /* |
| * These next conversion functions are for file system paths. |
| * The NSString needs to be in de-composed UTF-16 format for the Apple file system |
| * The Java String needs to be in pre-composed UTF-16 format for display by Java. |
| * https://developer.apple.com/library/archive/qa/qa1235/_index.html |
| * has some information on this. |
| */ |
| |
| /* |
| * Returns an NSString in decomposed UTF16 format that is compatible with HFS's |
| * expectation of the UTF16 format for file system paths. |
| * |
| * Example string: "/Users/Amélie/" |
| * |
| * Java's UTF16 string is "/ U s e r s / A m \351 l i e /" |
| * macOS UTF16 string suitable for HFS is "/ U s e r s / A m e \314 \201 l i e /" |
| * |
| * There is no direct API that takes in NSString UTF16 encoded by Java |
| * and produces NSString UTF16 for HFS, so we first need to decompose it |
| * into chars (suitable for low level C file APIs), and only then |
| * create NSString representation of this decomposition back into UTF16 string. |
| * |
| * https://developer.apple.com/documentation/foundation/nsstring/1414559-filesystemrepresentation?language=objc |
| * describes how to get a file system representation as a char* from an NSString |
| * and then using FileManager (!) convert it to an NSString. |
| * But we want an NSString. |
| * So the steps are |
| * 1) Convert to NSString |
| * 2) call [NSString fileSystemRepresentation] which gives us a char* |
| * 3) Convert the returned char* to an NSString using FileManager (is there a better way?) |
| */ |
| NSString* NormalizedPathNSStringFromJavaString(JNIEnv *env, jstring pathStr) { |
| if (pathStr == NULL) { |
| return nil; |
| } |
| NSString *nsStr = JavaStringToNSString(env, pathStr); |
| if (nsStr == NULL) { |
| return nil; |
| } |
| const char* chs = [nsStr fileSystemRepresentation]; |
| int len = strlen(chs); |
| NSString* result = [[NSFileManager defaultManager] |
| stringWithFileSystemRepresentation:chs length:len]; |
| return result; |
| } |
| |
| /* |
| * Given what is (potentially) a de-composed NSString, convert it to pre-composed |
| * Then convert it into a Java String. |
| */ |
| jstring NormalizedPathJavaStringFromNSString(JNIEnv* env, NSString *str) { |
| if (str == nil) { |
| return NULL; |
| } |
| NSString *normStr = [str precomposedStringWithCanonicalMapping]; |
| return NSStringToJavaString(env, normStr); |
| } |