Move library source into src sub-directory

Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>

2 files changed, 250 insertions, 0 deletions

diff --git a/lib/io/src/xfrm/istream.c b/lib/io/src/xfrm/istream.c
new file mode 100644
index 0000000..4a1ad77
--- /dev/null
+++ b/lib/io/src/xfrm/istream.c
@@ -0,0 +1,106 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * istream.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "../internal.h"
+
+typedef struct istream_xfrm_t {
+	istream_t base;
+
+	istream_t *wrapped;
+	xfrm_stream_t *xfrm;
+
+	sqfs_u8 uncompressed[BUFSZ];
+} istream_xfrm_t;
+
+static int xfrm_precache(istream_t *base)
+{
+	istream_xfrm_t *xfrm = (istream_xfrm_t *)base;
+	int ret;
+
+	ret = istream_precache(xfrm->wrapped);
+	if (ret != 0)
+		return ret;
+
+	for (;;) {
+		const sqfs_u32 in_sz = xfrm->wrapped->buffer_used;
+		const sqfs_u32 out_sz = sizeof(xfrm->uncompressed);
+		sqfs_u32 in_off = 0, out_off = base->buffer_used;
+		int mode = XFRM_STREAM_FLUSH_NONE;
+
+		if (xfrm->wrapped->eof)
+			mode = XFRM_STREAM_FLUSH_FULL;
+
+		ret = xfrm->xfrm->process_data(xfrm->xfrm,
+					       xfrm->wrapped->buffer, in_sz,
+					       base->buffer + out_off,
+					       out_sz - out_off,
+					       &in_off, &out_off, mode);
+
+		if (ret == XFRM_STREAM_ERROR) {
+			fprintf(stderr, "%s: internal error in decompressor.\n",
+				base->get_filename(base));
+			return -1;
+		}
+
+		base->buffer_used = out_off;
+		xfrm->wrapped->buffer_offset = in_off;
+
+		if (ret == XFRM_STREAM_BUFFER_FULL || out_off >= out_sz)
+			break;
+
+		ret = istream_precache(xfrm->wrapped);
+		if (ret != 0)
+			return ret;
+
+		if (xfrm->wrapped->eof && xfrm->wrapped->buffer_used == 0) {
+			if (base->buffer_used == 0)
+				base->eof = true;
+			break;
+		}
+	}
+
+	return 0;
+}
+
+static const char *xfrm_get_filename(istream_t *strm)
+{
+	istream_xfrm_t *xfrm = (istream_xfrm_t *)strm;
+
+	return xfrm->wrapped->get_filename(xfrm->wrapped);
+}
+
+static void xfrm_destroy(sqfs_object_t *obj)
+{
+	istream_xfrm_t *xfrm = (istream_xfrm_t *)obj;
+
+	sqfs_drop(xfrm->xfrm);
+	sqfs_drop(xfrm->wrapped);
+	free(xfrm);
+}
+
+istream_t *istream_xfrm_create(istream_t *strm, xfrm_stream_t *xfrm)
+{
+	istream_xfrm_t *stream = calloc(1, sizeof(*stream));
+	istream_t *base = (istream_t *)stream;
+
+	if (stream == NULL)
+		goto fail;
+
+	sqfs_object_init(stream, xfrm_destroy, NULL);
+
+	stream->wrapped = sqfs_grab(strm);
+	stream->xfrm = sqfs_grab(xfrm);
+
+	base->precache = xfrm_precache;
+	base->get_filename = xfrm_get_filename;
+	base->buffer = stream->uncompressed;
+	base->eof = false;
+	return base;
+fail:
+	fprintf(stderr, "%s: error initializing decompressor stream.\n",
+		strm->get_filename(strm));
+	return NULL;
+}
diff --git a/lib/io/src/xfrm/ostream.c b/lib/io/src/xfrm/ostream.c
new file mode 100644
index 0000000..bd94515
--- /dev/null
+++ b/lib/io/src/xfrm/ostream.c
@@ -0,0 +1,144 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * ostream.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "../internal.h"
+
+typedef struct ostream_xfrm_t {
+	ostream_t base;
+
+	ostream_t *wrapped;
+	xfrm_stream_t *xfrm;
+
+	size_t inbuf_used;
+
+	sqfs_u8 inbuf[BUFSZ];
+	sqfs_u8 outbuf[BUFSZ];
+} ostream_xfrm_t;
+
+static int flush_inbuf(ostream_xfrm_t *xfrm, bool finish)
+{
+	const sqfs_u32 avail_out = sizeof(xfrm->outbuf);
+	const sqfs_u32 avail_in = xfrm->inbuf_used;
+	const int mode = finish ? XFRM_STREAM_FLUSH_FULL :
+		XFRM_STREAM_FLUSH_NONE;
+	sqfs_u32 off_in = 0, off_out = 0;
+	int ret;
+
+	while (finish || off_in < avail_in) {
+		ret = xfrm->xfrm->process_data(xfrm->xfrm,
+					       xfrm->inbuf + off_in,
+					       avail_in - off_in,
+					       xfrm->outbuf + off_out,
+					       avail_out - off_out,
+					       &off_in, &off_out, mode);
+
+		if (ret == XFRM_STREAM_ERROR) {
+			fprintf(stderr,
+				"%s: internal error in compressor.\n",
+				xfrm->wrapped->get_filename(xfrm->wrapped));
+			return -1;
+		}
+
+		if (ostream_append(xfrm->wrapped, xfrm->outbuf, off_out))
+			return -1;
+
+		off_out = 0;
+
+		if (ret == XFRM_STREAM_END)
+			break;
+	}
+
+	if (off_out > 0) {
+		if (ostream_append(xfrm->wrapped, xfrm->outbuf, off_out))
+			return -1;
+	}
+
+	if (off_in < avail_in) {
+		memmove(xfrm->inbuf, xfrm->inbuf + off_in, avail_in - off_in);
+		xfrm->inbuf_used -= off_in;
+	} else {
+		xfrm->inbuf_used = 0;
+	}
+
+	return 0;
+}
+
+static int xfrm_append(ostream_t *strm, const void *data, size_t size)
+{
+	ostream_xfrm_t *xfrm = (ostream_xfrm_t *)strm;
+	size_t diff;
+
+	while (size > 0) {
+		if (xfrm->inbuf_used >= BUFSZ) {
+			if (flush_inbuf(xfrm, false))
+				return -1;
+		}
+
+		diff = BUFSZ - xfrm->inbuf_used;
+
+		if (diff > size)
+			diff = size;
+
+		memcpy(xfrm->inbuf + xfrm->inbuf_used, data, diff);
+
+		xfrm->inbuf_used += diff;
+		data = (const char *)data + diff;
+		size -= diff;
+	}
+
+	return 0;
+}
+
+static int xfrm_flush(ostream_t *strm)
+{
+	ostream_xfrm_t *xfrm = (ostream_xfrm_t *)strm;
+
+	if (xfrm->inbuf_used > 0) {
+		if (flush_inbuf(xfrm, true))
+			return -1;
+	}
+
+	return xfrm->wrapped->flush(xfrm->wrapped);
+}
+
+static const char *xfrm_get_filename(ostream_t *strm)
+{
+	ostream_xfrm_t *xfrm = (ostream_xfrm_t *)strm;
+
+	return xfrm->wrapped->get_filename(xfrm->wrapped);
+}
+
+static void xfrm_destroy(sqfs_object_t *obj)
+{
+	ostream_xfrm_t *xfrm = (ostream_xfrm_t *)obj;
+
+	sqfs_drop(xfrm->wrapped);
+	sqfs_drop(xfrm->xfrm);
+	free(xfrm);
+}
+
+ostream_t *ostream_xfrm_create(ostream_t *strm, xfrm_stream_t *xfrm)
+{
+	ostream_xfrm_t *stream = calloc(1, sizeof(*stream));
+	ostream_t *base = (ostream_t *)stream;
+
+	if (stream == NULL)
+		goto fail;
+
+	sqfs_object_init(stream, xfrm_destroy, NULL);
+
+	stream->wrapped = sqfs_grab(strm);
+	stream->xfrm = sqfs_grab(xfrm);
+	stream->inbuf_used = 0;
+	base->append = xfrm_append;
+	base->flush = xfrm_flush;
+	base->get_filename = xfrm_get_filename;
+	return base;
+fail:
+	fprintf(stderr, "%s: error initializing compressor.\n",
+		strm->get_filename(strm));
+	return NULL;
+}