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-rw-r--r--lib/io/compress/bzip2.c96
-rw-r--r--lib/io/compress/gzip.c92
-rw-r--r--lib/io/compress/ostream_compressor.c108
-rw-r--r--lib/io/compress/xz.c80
-rw-r--r--lib/io/compress/zstd.c94
5 files changed, 470 insertions, 0 deletions
diff --git a/lib/io/compress/bzip2.c b/lib/io/compress/bzip2.c
new file mode 100644
index 0000000..7f0c09a
--- /dev/null
+++ b/lib/io/compress/bzip2.c
@@ -0,0 +1,96 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * bzip2.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "../internal.h"
+
+#include <bzlib.h>
+
+typedef struct {
+ ostream_comp_t base;
+
+ bz_stream strm;
+} ostream_bzip2_t;
+
+static int flush_inbuf(ostream_comp_t *base, bool finish)
+{
+ ostream_bzip2_t *bzip2 = (ostream_bzip2_t *)base;
+ size_t have;
+ int ret;
+
+ bzip2->strm.next_in = (char *)base->inbuf;
+
+ if (base->inbuf_used > sizeof(base->inbuf))
+ base->inbuf_used = sizeof(base->inbuf);
+
+ if ((sizeof(size_t) > sizeof(unsigned int)) &&
+ (base->inbuf_used > (size_t)UINT_MAX)) {
+ bzip2->strm.avail_in = UINT_MAX;
+ } else {
+ bzip2->strm.avail_in = (unsigned int)base->inbuf_used;
+ }
+
+ for (;;) {
+ bzip2->strm.next_out = (char *)base->outbuf;
+ bzip2->strm.avail_out = sizeof(base->outbuf);
+
+ ret = BZ2_bzCompress(&bzip2->strm, finish ? BZ_FINISH : BZ_RUN);
+
+ if (ret < 0 && ret != BZ_OUTBUFF_FULL) {
+ fprintf(stderr, "%s: internal error in bzip2 "
+ "compressor.\n",
+ base->wrapped->get_filename(base->wrapped));
+ return -1;
+ }
+
+ have = sizeof(base->outbuf) - bzip2->strm.avail_out;
+
+ if (base->wrapped->append(base->wrapped, base->outbuf, have))
+ return -1;
+
+ if (ret == BZ_STREAM_END || ret == BZ_OUTBUFF_FULL ||
+ bzip2->strm.avail_in == 0) {
+ break;
+ }
+ }
+
+ if (bzip2->strm.avail_in > 0) {
+ memmove(base->inbuf, bzip2->strm.next_in,
+ bzip2->strm.avail_in);
+ }
+
+ base->inbuf_used = bzip2->strm.avail_in;
+ return 0;
+}
+
+static void cleanup(ostream_comp_t *base)
+{
+ ostream_bzip2_t *bzip2 = (ostream_bzip2_t *)base;
+
+ BZ2_bzCompressEnd(&bzip2->strm);
+}
+
+ostream_comp_t *ostream_bzip2_create(const char *filename)
+{
+ ostream_bzip2_t *bzip2 = calloc(1, sizeof(*bzip2));
+ ostream_comp_t *base = (ostream_comp_t *)bzip2;
+
+ if (bzip2 == NULL) {
+ fprintf(stderr, "%s: creating bzip2 compressor: %s.\n",
+ filename, strerror(errno));
+ return NULL;
+ }
+
+ if (BZ2_bzCompressInit(&bzip2->strm, 9, 0, 30) != BZ_OK) {
+ fprintf(stderr, "%s: error initializing bzip2 compressor.\n",
+ filename);
+ free(bzip2);
+ return NULL;
+ }
+
+ base->flush_inbuf = flush_inbuf;
+ base->cleanup = cleanup;
+ return base;
+}
diff --git a/lib/io/compress/gzip.c b/lib/io/compress/gzip.c
new file mode 100644
index 0000000..b73a258
--- /dev/null
+++ b/lib/io/compress/gzip.c
@@ -0,0 +1,92 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * gzip.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "../internal.h"
+
+#include <zlib.h>
+
+typedef struct {
+ ostream_comp_t base;
+
+ z_stream strm;
+} ostream_gzip_t;
+
+static int flush_inbuf(ostream_comp_t *base, bool finish)
+{
+ ostream_gzip_t *gzip = (ostream_gzip_t *)base;
+ size_t have;
+ int ret;
+
+ if (base->inbuf_used > sizeof(base->inbuf))
+ base->inbuf_used = sizeof(base->inbuf);
+
+ if (sizeof(size_t) > sizeof(uInt)) {
+ gzip->strm.avail_in = ~((uInt)0);
+
+ if ((size_t)gzip->strm.avail_in > base->inbuf_used)
+ gzip->strm.avail_in = (uInt)base->inbuf_used;
+ } else {
+ gzip->strm.avail_in = (uInt)base->inbuf_used;
+ }
+
+ gzip->strm.next_in = base->inbuf;
+
+ do {
+ gzip->strm.avail_out = BUFSZ;
+ gzip->strm.next_out = base->outbuf;
+
+ ret = deflate(&gzip->strm, finish ? Z_FINISH : Z_NO_FLUSH);
+
+ if (ret == Z_STREAM_ERROR) {
+ fprintf(stderr,
+ "%s: internal error in gzip compressor.\n",
+ base->wrapped->get_filename(base->wrapped));
+ return -1;
+ }
+
+ have = BUFSZ - gzip->strm.avail_out;
+
+ if (base->wrapped->append(base->wrapped, base->outbuf, have))
+ return -1;
+ } while (gzip->strm.avail_out == 0);
+
+ base->inbuf_used = 0;
+ return 0;
+}
+
+static void cleanup(ostream_comp_t *base)
+{
+ ostream_gzip_t *gzip = (ostream_gzip_t *)base;
+
+ deflateEnd(&gzip->strm);
+}
+
+ostream_comp_t *ostream_gzip_create(const char *filename)
+{
+ ostream_gzip_t *gzip = calloc(1, sizeof(*gzip));
+ ostream_comp_t *base = (ostream_comp_t *)gzip;
+ int ret;
+
+ if (gzip == NULL) {
+ fprintf(stderr, "%s: creating gzip wrapper: %s.\n",
+ filename, strerror(errno));
+ return NULL;
+ }
+
+ ret = deflateInit2(&gzip->strm, 9, Z_DEFLATED, 16 + 15, 8,
+ Z_DEFAULT_STRATEGY);
+ if (ret != Z_OK) {
+ fprintf(stderr,
+ "%s: internal error creating gzip compressor.\n",
+ filename);
+ free(gzip);
+ return NULL;
+ }
+
+ base->flush_inbuf = flush_inbuf;
+ base->cleanup = cleanup;
+ return base;
+}
diff --git a/lib/io/compress/ostream_compressor.c b/lib/io/compress/ostream_compressor.c
new file mode 100644
index 0000000..314ce6b
--- /dev/null
+++ b/lib/io/compress/ostream_compressor.c
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * ostream_compressor.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "../internal.h"
+
+static int comp_append(ostream_t *strm, const void *data, size_t size)
+{
+ ostream_comp_t *comp = (ostream_comp_t *)strm;
+ size_t diff;
+
+ while (size > 0) {
+ if (comp->inbuf_used >= BUFSZ) {
+ if (comp->flush_inbuf(comp, false))
+ return -1;
+ }
+
+ diff = BUFSZ - comp->inbuf_used;
+
+ if (diff > size)
+ diff = size;
+
+ memcpy(comp->inbuf + comp->inbuf_used, data, diff);
+
+ comp->inbuf_used += diff;
+ data = (const char *)data + diff;
+ size -= diff;
+ }
+
+ return 0;
+}
+
+static int comp_flush(ostream_t *strm)
+{
+ ostream_comp_t *comp = (ostream_comp_t *)strm;
+
+ if (comp->inbuf_used > 0) {
+ if (comp->flush_inbuf(comp, true))
+ return -1;
+ }
+
+ return comp->wrapped->flush(comp->wrapped);
+}
+
+static const char *comp_get_filename(ostream_t *strm)
+{
+ ostream_comp_t *comp = (ostream_comp_t *)strm;
+
+ return comp->wrapped->get_filename(comp->wrapped);
+}
+
+static void comp_destroy(sqfs_object_t *obj)
+{
+ ostream_comp_t *comp = (ostream_comp_t *)obj;
+
+ comp->cleanup(comp);
+ sqfs_destroy(comp->wrapped);
+ free(comp);
+}
+
+ostream_t *ostream_compressor_create(ostream_t *strm, int comp_id)
+{
+ ostream_comp_t *comp = NULL;
+ sqfs_object_t *obj;
+ ostream_t *base;
+
+ switch (comp_id) {
+ case IO_COMPRESSOR_GZIP:
+#ifdef WITH_GZIP
+ comp = ostream_gzip_create(strm->get_filename(strm));
+#endif
+ break;
+ case IO_COMPRESSOR_XZ:
+#ifdef WITH_XZ
+ comp = ostream_xz_create(strm->get_filename(strm));
+#endif
+ break;
+ case IO_COMPRESSOR_ZSTD:
+#if defined(WITH_ZSTD) && defined(HAVE_ZSTD_STREAM)
+ comp = ostream_zstd_create(strm->get_filename(strm));
+#endif
+ break;
+ case IO_COMPRESSOR_BZIP2:
+#ifdef WITH_BZIP2
+ comp = ostream_bzip2_create(strm->get_filename(strm));
+#endif
+ break;
+ default:
+ break;
+ }
+
+ if (comp == NULL)
+ return NULL;
+
+ comp->wrapped = strm;
+ comp->inbuf_used = 0;
+
+ base = (ostream_t *)comp;
+ base->append = comp_append;
+ base->flush = comp_flush;
+ base->get_filename = comp_get_filename;
+
+ obj = (sqfs_object_t *)comp;
+ obj->destroy = comp_destroy;
+ return base;
+}
diff --git a/lib/io/compress/xz.c b/lib/io/compress/xz.c
new file mode 100644
index 0000000..65bda0b
--- /dev/null
+++ b/lib/io/compress/xz.c
@@ -0,0 +1,80 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * xz.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "../internal.h"
+
+#include <lzma.h>
+
+typedef struct {
+ ostream_comp_t base;
+
+ lzma_stream strm;
+} ostream_xz_t;
+
+static int flush_inbuf(ostream_comp_t *base, bool finish)
+{
+ ostream_xz_t *xz = (ostream_xz_t *)base;
+ lzma_ret ret_xz;
+ size_t have;
+
+ xz->strm.next_in = base->inbuf;
+ xz->strm.avail_in = base->inbuf_used;
+
+ do {
+ xz->strm.next_out = base->outbuf;
+ xz->strm.avail_out = BUFSZ;
+
+ ret_xz = lzma_code(&xz->strm, finish ? LZMA_FINISH : LZMA_RUN);
+
+ if ((ret_xz != LZMA_OK) && (ret_xz != LZMA_STREAM_END)) {
+ fprintf(stderr,
+ "%s: internal error in XZ compressor.\n",
+ base->wrapped->get_filename(base->wrapped));
+ return -1;
+ }
+
+ have = BUFSZ - xz->strm.avail_out;
+
+ if (base->wrapped->append(base->wrapped, base->outbuf, have))
+ return -1;
+ } while (xz->strm.avail_out == 0);
+
+ base->inbuf_used = 0;
+ return 0;
+}
+
+static void cleanup(ostream_comp_t *base)
+{
+ ostream_xz_t *xz = (ostream_xz_t *)base;
+
+ lzma_end(&xz->strm);
+}
+
+ostream_comp_t *ostream_xz_create(const char *filename)
+{
+ ostream_xz_t *xz = calloc(1, sizeof(*xz));
+ ostream_comp_t *base = (ostream_comp_t *)xz;
+ lzma_ret ret_xz;
+
+ if (xz == NULL) {
+ fprintf(stderr, "%s: creating xz wrapper: %s.\n",
+ filename, strerror(errno));
+ return NULL;
+ }
+
+ ret_xz = lzma_easy_encoder(&xz->strm, LZMA_PRESET_DEFAULT,
+ LZMA_CHECK_CRC64);
+ if (ret_xz != LZMA_OK) {
+ fprintf(stderr, "%s: error initializing XZ compressor\n",
+ filename);
+ free(xz);
+ return NULL;
+ }
+
+ base->flush_inbuf = flush_inbuf;
+ base->cleanup = cleanup;
+ return base;
+}
diff --git a/lib/io/compress/zstd.c b/lib/io/compress/zstd.c
new file mode 100644
index 0000000..c0b002e
--- /dev/null
+++ b/lib/io/compress/zstd.c
@@ -0,0 +1,94 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later */
+/*
+ * zstd.c
+ *
+ * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
+ */
+#include "../internal.h"
+
+#include <zstd.h>
+
+#ifdef HAVE_ZSTD_STREAM
+typedef struct {
+ ostream_comp_t base;
+
+ ZSTD_CStream *strm;
+} ostream_zstd_t;
+
+static int flush_inbuf(ostream_comp_t *base, bool finish)
+{
+ ostream_zstd_t *zstd = (ostream_zstd_t *)base;
+ ZSTD_EndDirective op;
+ ZSTD_outBuffer out;
+ ZSTD_inBuffer in;
+ size_t ret;
+
+ op = finish ? ZSTD_e_end : ZSTD_e_continue;
+
+ do {
+ memset(&in, 0, sizeof(in));
+ memset(&out, 0, sizeof(out));
+
+ in.src = base->inbuf;
+ in.size = base->inbuf_used;
+
+ out.dst = base->outbuf;
+ out.size = BUFSZ;
+
+ ret = ZSTD_compressStream2(zstd->strm, &out, &in, op);
+
+ if (ZSTD_isError(ret)) {
+ fprintf(stderr, "%s: error in zstd compressor.\n",
+ base->wrapped->get_filename(base->wrapped));
+ return -1;
+ }
+
+ if (base->wrapped->append(base->wrapped, base->outbuf,
+ out.pos)) {
+ return -1;
+ }
+
+ if (in.pos < in.size) {
+ base->inbuf_used = in.size - in.pos;
+
+ memmove(base->inbuf, base->inbuf + in.pos,
+ base->inbuf_used);
+ } else {
+ base->inbuf_used = 0;
+ }
+ } while (finish && ret != 0);
+
+ return 0;
+}
+
+static void cleanup(ostream_comp_t *base)
+{
+ ostream_zstd_t *zstd = (ostream_zstd_t *)base;
+
+ ZSTD_freeCStream(zstd->strm);
+}
+
+ostream_comp_t *ostream_zstd_create(const char *filename)
+{
+ ostream_zstd_t *zstd = calloc(1, sizeof(*zstd));
+ ostream_comp_t *base = (ostream_comp_t *)zstd;
+
+ if (zstd == NULL) {
+ fprintf(stderr, "%s: creating zstd wrapper: %s.\n",
+ filename, strerror(errno));
+ return NULL;
+ }
+
+ zstd->strm = ZSTD_createCStream();
+ if (zstd->strm == NULL) {
+ fprintf(stderr, "%s: error creating zstd decoder.\n",
+ filename);
+ free(zstd);
+ return NULL;
+ }
+
+ base->flush_inbuf = flush_inbuf;
+ base->cleanup = cleanup;
+ return base;
+}
+#endif /* HAVE_ZSTD_STREAM */
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