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.idea/runConfigurations/HelloWorldFileSystem__Windows_.xml
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.../runConfigurations/HelloJnrFileSystem.xml → ...runConfigurations/RandomJnrFileSystem.xml
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77 changes: 33 additions & 44 deletions
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jfuse-api/src/main/java/org/cryptomator/jfuse/api/DirFiller.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,69 +1,58 @@ | ||
| package org.cryptomator.jfuse.api; | ||
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| import org.jetbrains.annotations.Nullable; | ||
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| import java.io.IOException; | ||
| import java.util.stream.Stream; | ||
| import java.util.function.Consumer; | ||
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| public interface DirFiller { | ||
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| /** | ||
| * Inserts a single item into the directory entry buffer. | ||
| * | ||
| * @param name The file name | ||
| * @param stat Currently ignored, future use | ||
| * @param offset The offset of the readdir-call plus the number of already filled entries | ||
| * @return 0 if readdir should continue to fill in further items, non-zero otherwise (including errors) | ||
| * @see <a href="https://libfuse.github.io/doxygen/structfuse__operations.html#adc01d3622754fc7de8e643249e73268d">official readdir docs</a> | ||
| * @see <a href="https://www.cs.hmc.edu/~geoff/classes/hmc.cs135.201001/homework/fuse/fuse_doc.html#readdir-details">readdir explanation from Geoff Kuenning</a> | ||
| * "Plus" mode: all file attributes are valid. | ||
| * <p> | ||
| * The attributes are used by the kernel to prefill the inode cache during a readdir. | ||
| * <p> | ||
| * It is okay to set FUSE_FILL_DIR_PLUS if {@link FuseOperations#FUSE_READDIR_PLUS FUSE_READDIR_PLUS} is not set | ||
| * and vice versa. | ||
| */ | ||
| int fill(String name, @Nullable Stat stat, long offset); | ||
| int FUSE_FILL_DIR_PLUS = 1 << 1; | ||
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| /** | ||
| * Convenience wrapper for {@link #fill(String, Stat, long)}, ignoring the offset parameter. | ||
| * Function to add an entry in a readdir() operation | ||
| * <p> | ||
| * The off parameter can be any non-zero value that enables the filesystem to identify the current point in the | ||
| * directory stream. It does not need to be the actual physical position. A value of zero is reserved to indicate | ||
| * that seeking in directories is not supported. | ||
| * | ||
| * @param name The file name | ||
| * @param stat Currently ignored, future use. | ||
| * @throws IOException If {@link #fill(String, Stat, long) fuse_fill_dir_t} returns 1, which indicates an error. | ||
| * @param name the file name of the directory entry | ||
| * @param stat file attributes, can be NULL | ||
| * @param offset offset of the next entry or zero when ignoring the offset parameter | ||
| * @param flags fill flags, set to {@link #FUSE_FILL_DIR_PLUS} to cache stats | ||
| * @return 1 if buffer is full or an error occured, zero otherwise | ||
| * @see <a href="https://libfuse.github.io/doxygen/structfuse__operations.html#adc01d3622754fc7de8e643249e73268d">official readdir docs</a> | ||
| * @see <a href="https://www.cs.hmc.edu/~geoff/classes/hmc.cs135.201001/homework/fuse/fuse_doc.html#readdir-details">readdir explanation from Geoff Kuenning</a> | ||
| */ | ||
| default void fill(String name, @Nullable Stat stat) throws IOException { | ||
| if (fill(name, stat, 0) != 0) { | ||
| throw new IOException("fuse_fill_dir_t unexpectedly returned 1"); | ||
| } | ||
| } | ||
| int fill(String name, Consumer<Stat> stat, long offset, int flags); | ||
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| /** | ||
| * Convenience wrapper for {@link #fill(String, Stat, long)}, using the offset parameter. | ||
| * <p> | ||
| * <strong>Important:</strong> Note that the complete set of directors entries must contain <code>.</code> and <code>..</code>. | ||
| * Convenience wrapper for {@link #fill(String, Consumer, long, int)}, ignoring the offset parameter. | ||
| * | ||
| * @param children A stream of directory entries offset by the given <code>offset</code> | ||
| * @param offset The offset of the stream (as requested by <code>readdir</code>) | ||
| * @param name The file name | ||
| * @param stat A method to pre-fill the stats of this node | ||
| * @throws IOException If {@link #fill(String, Consumer, long, int) fuse_fill_dir_t} returns 1, which indicates an error. | ||
| */ | ||
| default void fillChildrenFromOffset(Stream<Child> children, long offset) { | ||
| var iterator = children.iterator(); | ||
| for (long i = offset; iterator.hasNext(); i++) { | ||
| var child = iterator.next(); | ||
| if (fill(child.name, child.stat, i + 1) != 0) { | ||
| return; | ||
| } | ||
| default void fill(String name, Consumer<Stat> stat) throws IOException { | ||
| if (fill(name, stat, 0, 0) != 0) { | ||
| throw new IOException("fuse_fill_dir_t unexpectedly returned 1"); | ||
| } | ||
| } | ||
|
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| /** | ||
| * Convenience wrapper for {@link #fill(String, Stat, long)}, using the offset parameter. | ||
| * <p> | ||
| * <strong>Important:</strong> Note that the complete set of directors entries must contain <code>.</code> and <code>..</code>. | ||
| * Convenienve wrapper for {@link #fill(String, Consumer, long, int)}, just filling in the name, ignoring stats. | ||
| * | ||
| * @param childNames A stream of the names of directory entries offset by the given <code>offset</code> | ||
| * @param offset The offset of the stream (as requested by <code>readdir</code>) | ||
| * @param name The file name | ||
| * @throws IOException If {@link #fill(String, Consumer, long, int) fuse_fill_dir_t} returns 1, which indicates an error. | ||
| */ | ||
| default void fillNamesFromOffset(Stream<String> childNames, long offset) { | ||
| var children = childNames.map(name -> new Child(name, null)); | ||
| fillChildrenFromOffset(children, offset); | ||
| } | ||
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| record Child(String name, @Nullable Stat stat) { | ||
| default void fill(String name) throws IOException { | ||
| fill(name, stat -> {}); | ||
| } | ||
|
|
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| } |
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