/** * primWrite: id from: byteArray startingAt: startIndex count: count "Write into the receiver's * file from the given area of storage, starting at the given index, as many as count bytes; * return the number of bytes actually written. 2/12/96 sw" * * <p><primitive: 158> * * <p>closed ifTrue: [^ self halt: 'Write error: File not open']. rwmode ifFalse: [^ self halt: * 'Error-attempt to write to a read-only file.']. self halt: 'File write error'! ! */ Object fileWrite(int argCount) { if (argCount != 4) throw fHandler.primitiveFailed(); RandomAccessFile file = lookupFile(3); SqueakObject byteArray = fHandler.stackNonInteger(2); int startIndex = fHandler.stackInteger(1) - 1; // zero based int count = fHandler.stackInteger(0); try { int written = 0; for (int index = startIndex; index < startIndex + count; index++) { file.write(byteArray.getByte(index)); written++; } return fHandler.pos32BitIntFor(written); } catch (IOException e) { e.printStackTrace(); } throw fHandler.primitiveFailed(); }
/** * primRead: id into: byteArray startingAt: startIndex count: count "read from the receiver's file * into the given area of storage, starting at the given index, as many as count bytes; return the * number of bytes actually read. 2/12/96 sw" * * <p><primitive: 154> * * <p>self halt: 'error reading file'! */ Object readIntoStartingAtCount(int argCount) { if (argCount != 4) throw fHandler.primitiveFailed(); SqueakObject byteArray = fHandler.stackNonInteger(2); int startIndex = fHandler.stackInteger(1) - 1; int count = fHandler.stackInteger(0); RandomAccessFile file = lookupFile(3); byte[] buffer = new byte[count]; try { int read = file.read(buffer, 0, count); for (int index = 0; index < read; index++) { byteArray.setByte(startIndex + index, buffer[index]); // FIXME: this code cheats! } return fHandler.pos32BitIntFor(read); } catch (IOException e) { e.printStackTrace(); } throw fHandler.primitiveFailed(); }
/** * lookupEntryIn: pathName index: index "Look up the index-th entry of the directory with the * given path (starting from the root of the file hierarchy) and return an array containing: * * <p><name> <creationTime> <modificationTime> <dirFlag> <fileSize> * * <p>The creation and modification times are in seconds since the start of the Smalltalk time * epoch. DirFlag is true if the entry is a directory. FileSize the file size in bytes or zero for * directories. The primitive returns nil when index is past the end of the directory. It fails if * the given pathName is bad." * * <p><primitive: 162> self primitiveFailed.! */ Object lookupEntryInIndex(int argCount) { if (argCount != 2) throw fHandler.primitiveFailed(); SqueakObject fullPath = fHandler.stackNonInteger(1); int index = fHandler.stackInteger(0) - 1; if (index < 0) throw fHandler.primitiveFailed(); String filename = fullPath.asString(); if (filename.trim().length() == 0) filename = "/"; File directory = new File(fullPath.asString()); if (!directory.exists()) throw fHandler.primitiveFailed(); File[] paths = directory.listFiles(); if (index < paths.length) return makeDirectoryEntryArray(paths[index]); return fHandler.squeakNil(); }