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-rw-r--r--Utilities/cmlibarchive/libarchive/archive_write_set_compression_none.c259
1 files changed, 259 insertions, 0 deletions
diff --git a/Utilities/cmlibarchive/libarchive/archive_write_set_compression_none.c b/Utilities/cmlibarchive/libarchive/archive_write_set_compression_none.c
new file mode 100644
index 0000000..f27d629
--- /dev/null
+++ b/Utilities/cmlibarchive/libarchive/archive_write_set_compression_none.c
@@ -0,0 +1,259 @@
+/*-
+ * Copyright (c) 2003-2007 Tim Kientzle
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "archive_platform.h"
+__FBSDID("$FreeBSD: src/lib/libarchive/archive_write_set_compression_none.c,v 1.16 2007/12/30 04:58:22 kientzle Exp $");
+
+#ifdef HAVE_ERRNO_H
+#include <errno.h>
+#endif
+#ifdef HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+
+#include "archive.h"
+#include "archive_private.h"
+#include "archive_write_private.h"
+
+static int archive_compressor_none_finish(struct archive_write *a);
+static int archive_compressor_none_init(struct archive_write *);
+static int archive_compressor_none_write(struct archive_write *,
+ const void *, size_t);
+
+struct archive_none {
+ char *buffer;
+ ssize_t buffer_size;
+ char *next; /* Current insert location */
+ ssize_t avail; /* Free space left in buffer */
+};
+
+int
+archive_write_set_compression_none(struct archive *_a)
+{
+ struct archive_write *a = (struct archive_write *)_a;
+ __archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC,
+ ARCHIVE_STATE_NEW, "archive_write_set_compression_none");
+ a->compressor.init = &archive_compressor_none_init;
+ return (0);
+}
+
+/*
+ * Setup callback.
+ */
+static int
+archive_compressor_none_init(struct archive_write *a)
+{
+ int ret;
+ struct archive_none *state;
+
+ a->archive.compression_code = ARCHIVE_COMPRESSION_NONE;
+ a->archive.compression_name = "none";
+
+ if (a->client_opener != NULL) {
+ ret = (a->client_opener)(&a->archive, a->client_data);
+ if (ret != 0)
+ return (ret);
+ }
+
+ state = (struct archive_none *)malloc(sizeof(*state));
+ if (state == NULL) {
+ archive_set_error(&a->archive, ENOMEM,
+ "Can't allocate data for output buffering");
+ return (ARCHIVE_FATAL);
+ }
+ memset(state, 0, sizeof(*state));
+
+ state->buffer_size = a->bytes_per_block;
+ if (state->buffer_size != 0) {
+ state->buffer = (char *)malloc(state->buffer_size);
+ if (state->buffer == NULL) {
+ archive_set_error(&a->archive, ENOMEM,
+ "Can't allocate output buffer");
+ free(state);
+ return (ARCHIVE_FATAL);
+ }
+ }
+
+ state->next = state->buffer;
+ state->avail = state->buffer_size;
+
+ a->compressor.data = state;
+ a->compressor.write = archive_compressor_none_write;
+ a->compressor.finish = archive_compressor_none_finish;
+ return (ARCHIVE_OK);
+}
+
+/*
+ * Write data to the stream.
+ */
+static int
+archive_compressor_none_write(struct archive_write *a, const void *vbuff,
+ size_t length)
+{
+ const char *buff;
+ ssize_t remaining, to_copy;
+ ssize_t bytes_written;
+ struct archive_none *state;
+
+ state = (struct archive_none *)a->compressor.data;
+ buff = (const char *)vbuff;
+ if (a->client_writer == NULL) {
+ archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER,
+ "No write callback is registered? "
+ "This is probably an internal programming error.");
+ return (ARCHIVE_FATAL);
+ }
+
+ remaining = length;
+
+ /*
+ * If there is no buffer for blocking, just pass the data
+ * straight through to the client write callback. In
+ * particular, this supports "no write delay" operation for
+ * special applications. Just set the block size to zero.
+ */
+ if (state->buffer_size == 0) {
+ while (remaining > 0) {
+ bytes_written = (a->client_writer)(&a->archive,
+ a->client_data, buff, remaining);
+ if (bytes_written <= 0)
+ return (ARCHIVE_FATAL);
+ a->archive.raw_position += bytes_written;
+ remaining -= bytes_written;
+ buff += bytes_written;
+ }
+ a->archive.file_position += length;
+ return (ARCHIVE_OK);
+ }
+
+ /* If the copy buffer isn't empty, try to fill it. */
+ if (state->avail < state->buffer_size) {
+ /* If buffer is not empty... */
+ /* ... copy data into buffer ... */
+ to_copy = (remaining > state->avail) ?
+ state->avail : remaining;
+ memcpy(state->next, buff, to_copy);
+ state->next += to_copy;
+ state->avail -= to_copy;
+ buff += to_copy;
+ remaining -= to_copy;
+ /* ... if it's full, write it out. */
+ if (state->avail == 0) {
+ bytes_written = (a->client_writer)(&a->archive,
+ a->client_data, state->buffer, state->buffer_size);
+ if (bytes_written <= 0)
+ return (ARCHIVE_FATAL);
+ /* XXX TODO: if bytes_written < state->buffer_size */
+ a->archive.raw_position += bytes_written;
+ state->next = state->buffer;
+ state->avail = state->buffer_size;
+ }
+ }
+
+ while (remaining > state->buffer_size) {
+ /* Write out full blocks directly to client. */
+ bytes_written = (a->client_writer)(&a->archive,
+ a->client_data, buff, state->buffer_size);
+ if (bytes_written <= 0)
+ return (ARCHIVE_FATAL);
+ a->archive.raw_position += bytes_written;
+ buff += bytes_written;
+ remaining -= bytes_written;
+ }
+
+ if (remaining > 0) {
+ /* Copy last bit into copy buffer. */
+ memcpy(state->next, buff, remaining);
+ state->next += remaining;
+ state->avail -= remaining;
+ }
+
+ a->archive.file_position += length;
+ return (ARCHIVE_OK);
+}
+
+
+/*
+ * Finish the compression.
+ */
+static int
+archive_compressor_none_finish(struct archive_write *a)
+{
+ ssize_t block_length;
+ ssize_t target_block_length;
+ ssize_t bytes_written;
+ int ret;
+ int ret2;
+ struct archive_none *state;
+
+ state = (struct archive_none *)a->compressor.data;
+ ret = ret2 = ARCHIVE_OK;
+ if (a->client_writer == NULL) {
+ archive_set_error(&a->archive, ARCHIVE_ERRNO_PROGRAMMER,
+ "No write callback is registered? "
+ "This is probably an internal programming error.");
+ return (ARCHIVE_FATAL);
+ }
+
+ /* If there's pending data, pad and write the last block */
+ if (state->next != state->buffer) {
+ block_length = state->buffer_size - state->avail;
+
+ /* Tricky calculation to determine size of last block */
+ target_block_length = block_length;
+ if (a->bytes_in_last_block <= 0)
+ /* Default or Zero: pad to full block */
+ target_block_length = a->bytes_per_block;
+ else
+ /* Round to next multiple of bytes_in_last_block. */
+ target_block_length = a->bytes_in_last_block *
+ ( (block_length + a->bytes_in_last_block - 1) /
+ a->bytes_in_last_block);
+ if (target_block_length > a->bytes_per_block)
+ target_block_length = a->bytes_per_block;
+ if (block_length < target_block_length) {
+ memset(state->next, 0,
+ target_block_length - block_length);
+ block_length = target_block_length;
+ }
+ bytes_written = (a->client_writer)(&a->archive,
+ a->client_data, state->buffer, block_length);
+ if (bytes_written <= 0)
+ ret = ARCHIVE_FATAL;
+ else {
+ a->archive.raw_position += bytes_written;
+ ret = ARCHIVE_OK;
+ }
+ }
+ if (state->buffer)
+ free(state->buffer);
+ free(state);
+ a->compressor.data = NULL;
+
+ return (ret);
+}
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