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-rw-r--r--lib/fstream/Makemodule.am6
-rw-r--r--lib/fstream/compress/bzip2.c87
-rw-r--r--lib/fstream/compress/ostream_compressor.c5
-rw-r--r--lib/fstream/compressor.c10
-rw-r--r--lib/fstream/internal.h4
-rw-r--r--lib/fstream/uncompress/autodetect.c1
-rw-r--r--lib/fstream/uncompress/bzip2.c87
-rw-r--r--lib/fstream/uncompress/istream_compressor.c5
8 files changed, 205 insertions, 0 deletions
diff --git a/lib/fstream/Makemodule.am b/lib/fstream/Makemodule.am
index 8a1254c..1834cb8 100644
--- a/lib/fstream/Makemodule.am
+++ b/lib/fstream/Makemodule.am
@@ -35,4 +35,10 @@ libfstream_a_SOURCES += lib/fstream/uncompress/zstd.c
libfstream_a_CPPFLAGS += -DWITH_ZSTD
endif
+if WITH_BZIP2
+libfstream_a_SOURCES += lib/fstream/compress/bzip2.c
+libfstream_a_SOURCES += lib/fstream/uncompress/bzip2.c
+libfstream_a_CPPFLAGS += -DWITH_BZIP2
+endif
+
noinst_LIBRARIES += libfstream.a
diff --git a/lib/fstream/compress/bzip2.c b/lib/fstream/compress/bzip2.c
new file mode 100644
index 0000000..3ca425a
--- /dev/null
+++ b/lib/fstream/compress/bzip2.c
@@ -0,0 +1,87 @@
+/* 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;
+ bzip2->strm.avail_in = 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/fstream/compress/ostream_compressor.c b/lib/fstream/compress/ostream_compressor.c
index d1d55e1..7ea7919 100644
--- a/lib/fstream/compress/ostream_compressor.c
+++ b/lib/fstream/compress/ostream_compressor.c
@@ -82,6 +82,11 @@ ostream_t *ostream_compressor_create(ostream_t *strm, int comp_id)
comp = ostream_zstd_create(strm->get_filename(strm));
#endif
break;
+ case FSTREAM_COMPRESSOR_BZIP2:
+#ifdef WITH_BZIP2
+ comp = ostream_bzip2_create(strm->get_filename(strm));
+#endif
+ break;
default:
break;
}
diff --git a/lib/fstream/compressor.c b/lib/fstream/compressor.c
index 84a859c..903a5f7 100644
--- a/lib/fstream/compressor.c
+++ b/lib/fstream/compressor.c
@@ -17,6 +17,9 @@ int fstream_compressor_id_from_name(const char *name)
if (strcmp(name, "zstd") == 0)
return FSTREAM_COMPRESSOR_ZSTD;
+ if (strcmp(name, "bzip2") == 0)
+ return FSTREAM_COMPRESSOR_BZIP2;
+
return -1;
}
@@ -31,6 +34,9 @@ const char *fstream_compressor_name_from_id(int id)
if (id == FSTREAM_COMPRESSOR_ZSTD)
return "zstd";
+ if (id == FSTREAM_COMPRESSOR_BZIP2)
+ return "bzip2";
+
return NULL;
}
@@ -49,6 +55,10 @@ bool fstream_compressor_exists(int id)
case FSTREAM_COMPRESSOR_ZSTD:
return true;
#endif
+#ifdef WITH_BZIP2
+ case FSTREAM_COMPRESSOR_BZIP2:
+ return true;
+#endif
default:
break;
}
diff --git a/lib/fstream/internal.h b/lib/fstream/internal.h
index 83ecc64..2dc81e4 100644
--- a/lib/fstream/internal.h
+++ b/lib/fstream/internal.h
@@ -59,12 +59,16 @@ SQFS_INTERNAL ostream_comp_t *ostream_xz_create(const char *filename);
SQFS_INTERNAL ostream_comp_t *ostream_zstd_create(const char *filename);
+SQFS_INTERNAL ostream_comp_t *ostream_bzip2_create(const char *filename);
+
SQFS_INTERNAL istream_comp_t *istream_gzip_create(const char *filename);
SQFS_INTERNAL istream_comp_t *istream_xz_create(const char *filename);
SQFS_INTERNAL istream_comp_t *istream_zstd_create(const char *filename);
+SQFS_INTERNAL istream_comp_t *istream_bzip2_create(const char *filename);
+
#ifdef __cplusplus
}
#endif
diff --git a/lib/fstream/uncompress/autodetect.c b/lib/fstream/uncompress/autodetect.c
index b788518..61628f8 100644
--- a/lib/fstream/uncompress/autodetect.c
+++ b/lib/fstream/uncompress/autodetect.c
@@ -14,6 +14,7 @@ static const struct {
{ FSTREAM_COMPRESSOR_GZIP, (const sqfs_u8 *)"\x1F\x8B\x08", 3 },
{ FSTREAM_COMPRESSOR_XZ, (const sqfs_u8 *)("\xFD" "7zXZ"), 6 },
{ FSTREAM_COMPRESSOR_ZSTD, (const sqfs_u8 *)"\x28\xB5\x2F\xFD", 4 },
+ { FSTREAM_COMPRESSOR_BZIP2, (const sqfs_u8 *)"BZh", 3 },
};
int istream_detect_compressor(istream_t *strm,
diff --git a/lib/fstream/uncompress/bzip2.c b/lib/fstream/uncompress/bzip2.c
new file mode 100644
index 0000000..b5fae5c
--- /dev/null
+++ b/lib/fstream/uncompress/bzip2.c
@@ -0,0 +1,87 @@
+/* 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 {
+ istream_comp_t base;
+
+ bz_stream strm;
+} istream_bzip2_t;
+
+static int precache(istream_t *base)
+{
+ istream_bzip2_t *bzip2 = (istream_bzip2_t *)base;
+ istream_t *wrapped = ((istream_comp_t *)base)->wrapped;
+ int ret;
+
+ for (;;) {
+ ret = istream_precache(wrapped);
+ if (ret != 0)
+ return ret;
+
+ bzip2->strm.next_in = (char *)wrapped->buffer;
+ bzip2->strm.avail_in = wrapped->buffer_used;
+
+ bzip2->strm.next_out = (char *)base->buffer + base->buffer_used;
+ bzip2->strm.avail_out = BUFSZ - base->buffer_used;
+
+ if (bzip2->strm.avail_out < 1)
+ break;
+
+ ret = BZ2_bzDecompress(&bzip2->strm);
+
+ if (ret < 0) {
+ fprintf(stderr, "%s: internal error in bzip2 "
+ "decompressor.\n",
+ wrapped->get_filename(wrapped));
+ return -1;
+ }
+
+ base->buffer_used = BUFSZ - bzip2->strm.avail_out;
+ wrapped->buffer_offset = wrapped->buffer_used -
+ bzip2->strm.avail_in;
+
+ if (ret == BZ_STREAM_END) {
+ base->eof = true;
+ break;
+ }
+ }
+
+ return 0;
+}
+
+static void cleanup(istream_comp_t *base)
+{
+ istream_bzip2_t *bzip2 = (istream_bzip2_t *)base;
+
+ BZ2_bzDecompressEnd(&bzip2->strm);
+}
+
+istream_comp_t *istream_bzip2_create(const char *filename)
+{
+ istream_bzip2_t *bzip2 = calloc(1, sizeof(*bzip2));
+ istream_comp_t *base = (istream_comp_t *)bzip2;
+
+ if (bzip2 == NULL) {
+ fprintf(stderr, "%s: creating bzip2 compressor: %s.\n",
+ filename, strerror(errno));
+ return NULL;
+ }
+
+ if (BZ2_bzDecompressInit(&bzip2->strm, 0, 0) != BZ_OK) {
+ fprintf(stderr, "%s: error initializing bzip2 decompressor.\n",
+ filename);
+ free(bzip2);
+ return NULL;
+ }
+
+ ((istream_t *)base)->precache = precache;
+ base->cleanup = cleanup;
+ return base;
+}
diff --git a/lib/fstream/uncompress/istream_compressor.c b/lib/fstream/uncompress/istream_compressor.c
index 2262c9b..bc8ef39 100644
--- a/lib/fstream/uncompress/istream_compressor.c
+++ b/lib/fstream/uncompress/istream_compressor.c
@@ -44,6 +44,11 @@ istream_t *istream_compressor_create(istream_t *strm, int comp_id)
comp = istream_zstd_create(strm->get_filename(strm));
#endif
break;
+ case FSTREAM_COMPRESSOR_BZIP2:
+#ifdef WITH_BZIP2
+ comp = istream_bzip2_create(strm->get_filename(strm));
+#endif
+ break;
default:
break;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 16:19:17 +0000