add gzip, bzip2

'

1 files changed, 236 insertions, 0 deletions

diff --git a/src/cmd/bzip2/lib/bzread.c b/src/cmd/bzip2/lib/bzread.c
new file mode 100644
index 00000000..9532600f
--- /dev/null
+++ b/src/cmd/bzip2/lib/bzread.c
@@ -0,0 +1,236 @@
+/* THIS FILE HAS BEEN MODIFIED -- rsc split bzlib.c into bzlib.c,
+		bzlibcompress.c, bzlibdecompress.c, bzlibread.c, bzlibwrite.c
+ */
+/*-------------------------------------------------------------*/
+/*--- Library top-level functions.                          ---*/
+/*---                                               bzlib.c ---*/
+/*-------------------------------------------------------------*/
+
+/*--
+  This file is a part of bzip2 and/or libbzip2, a program and
+  library for lossless, block-sorting data compression.
+
+  Copyright (C) 1996-2000 Julian R Seward.  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. The origin of this software must not be misrepresented; you must 
+     not claim that you wrote the original software.  If you use this 
+     software in a product, an acknowledgment in the product 
+     documentation would be appreciated but is not required.
+
+  3. Altered source versions must be plainly marked as such, and must
+     not be misrepresented as being the original software.
+
+  4. The name of the author may not be used to endorse or promote 
+     products derived from this software without specific prior written 
+     permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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.
+
+  Julian Seward, Cambridge, UK.
+  jseward@acm.org
+  bzip2/libbzip2 version 1.0 of 21 March 2000
+
+  This program is based on (at least) the work of:
+     Mike Burrows
+     David Wheeler
+     Peter Fenwick
+     Alistair Moffat
+     Radford Neal
+     Ian H. Witten
+     Robert Sedgewick
+     Jon L. Bentley
+
+  For more information on these sources, see the manual.
+--*/
+
+/*--
+   CHANGES
+   ~~~~~~~
+   0.9.0 -- original version.
+
+   0.9.0a/b -- no changes in this file.
+
+   0.9.0c
+      * made zero-length BZ_FLUSH work correctly in bzCompress().
+      * fixed bzWrite/bzRead to ignore zero-length requests.
+      * fixed bzread to correctly handle read requests after EOF.
+      * wrong parameter order in call to bzDecompressInit in
+        bzBuffToBuffDecompress.  Fixed.
+--*/
+
+#include "os.h"
+#include "bzlib.h"
+#include "bzlib_private.h"
+#include "bzlib_stdio.h"
+#include "bzlib_stdio_private.h"
+
+/*---------------------------------------------------*/
+BZFILE* BZ_API(BZ2_bzReadOpen) 
+                   ( int*  bzerror, 
+                     FILE* f, 
+                     int   verbosity,
+                     int   small,
+                     void* unused,
+                     int   nUnused )
+{
+   bzFile* bzf = NULL;
+   int     ret;
+
+   BZ_SETERR(BZ_OK);
+
+   if (f == NULL || 
+       (small != 0 && small != 1) ||
+       (verbosity < 0 || verbosity > 4) ||
+       (unused == NULL && nUnused != 0) ||
+       (unused != NULL && (nUnused < 0 || nUnused > BZ_MAX_UNUSED)))
+      { BZ_SETERR(BZ_PARAM_ERROR); return NULL; };
+
+   if (ferror(f))
+      { BZ_SETERR(BZ_IO_ERROR); return NULL; };
+
+   bzf = malloc ( sizeof(bzFile) );
+   if (bzf == NULL) 
+      { BZ_SETERR(BZ_MEM_ERROR); return NULL; };
+
+   BZ_SETERR(BZ_OK);
+
+   bzf->initialisedOk = False;
+   bzf->handle        = f;
+   bzf->bufN          = 0;
+   bzf->writing       = False;
+   bzf->strm.bzalloc  = NULL;
+   bzf->strm.bzfree   = NULL;
+   bzf->strm.opaque   = NULL;
+   
+   while (nUnused > 0) {
+      bzf->buf[bzf->bufN] = *((UChar*)(unused)); bzf->bufN++;
+      unused = ((void*)( 1 + ((UChar*)(unused))  ));
+      nUnused--;
+   }
+
+   ret = BZ2_bzDecompressInit ( &(bzf->strm), verbosity, small );
+   if (ret != BZ_OK)
+      { BZ_SETERR(ret); free(bzf); return NULL; };
+
+   bzf->strm.avail_in = bzf->bufN;
+   bzf->strm.next_in  = bzf->buf;
+
+   bzf->initialisedOk = True;
+   return bzf;   
+}
+
+
+/*---------------------------------------------------*/
+void BZ_API(BZ2_bzReadClose) ( int *bzerror, BZFILE *b )
+{
+   bzFile* bzf = (bzFile*)b;
+
+   BZ_SETERR(BZ_OK);
+   if (bzf == NULL)
+      { BZ_SETERR(BZ_OK); return; };
+
+   if (bzf->writing)
+      { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
+
+   if (bzf->initialisedOk)
+      (void)BZ2_bzDecompressEnd ( &(bzf->strm) );
+   free ( bzf );
+}
+
+
+/*---------------------------------------------------*/
+int BZ_API(BZ2_bzRead) 
+           ( int*    bzerror, 
+             BZFILE* b, 
+             void*   buf, 
+             int     len )
+{
+   Int32   n, ret;
+   bzFile* bzf = (bzFile*)b;
+
+   BZ_SETERR(BZ_OK);
+
+   if (bzf == NULL || buf == NULL || len < 0)
+      { BZ_SETERR(BZ_PARAM_ERROR); return 0; };
+
+   if (bzf->writing)
+      { BZ_SETERR(BZ_SEQUENCE_ERROR); return 0; };
+
+   if (len == 0)
+      { BZ_SETERR(BZ_OK); return 0; };
+
+   bzf->strm.avail_out = len;
+   bzf->strm.next_out = buf;
+
+   while (True) {
+
+      if (ferror(bzf->handle)) 
+         { BZ_SETERR(BZ_IO_ERROR); return 0; };
+
+      if (bzf->strm.avail_in == 0 && !bz_feof(bzf->handle)) {
+         n = fread ( bzf->buf, sizeof(UChar), 
+                     BZ_MAX_UNUSED, bzf->handle );
+         if (ferror(bzf->handle))
+            { BZ_SETERR(BZ_IO_ERROR); return 0; };
+         bzf->bufN = n;
+         bzf->strm.avail_in = bzf->bufN;
+         bzf->strm.next_in = bzf->buf;
+      }
+
+      ret = BZ2_bzDecompress ( &(bzf->strm) );
+
+      if (ret != BZ_OK && ret != BZ_STREAM_END)
+         { BZ_SETERR(ret); return 0; };
+
+      if (ret == BZ_OK && bz_feof(bzf->handle) && 
+          bzf->strm.avail_in == 0 && bzf->strm.avail_out > 0)
+         { BZ_SETERR(BZ_UNEXPECTED_EOF); return 0; };
+
+      if (ret == BZ_STREAM_END)
+         { BZ_SETERR(BZ_STREAM_END);
+           return len - bzf->strm.avail_out; };
+      if (bzf->strm.avail_out == 0)
+         { BZ_SETERR(BZ_OK); return len; };
+      
+   }
+
+   return 0; /*not reached*/
+}
+
+
+/*---------------------------------------------------*/
+void BZ_API(BZ2_bzReadGetUnused) 
+                     ( int*    bzerror, 
+                       BZFILE* b, 
+                       void**  unused, 
+                       int*    nUnused )
+{
+   bzFile* bzf = (bzFile*)b;
+   if (bzf == NULL)
+      { BZ_SETERR(BZ_PARAM_ERROR); return; };
+   if (bzf->lastErr != BZ_STREAM_END)
+      { BZ_SETERR(BZ_SEQUENCE_ERROR); return; };
+   if (unused == NULL || nUnused == NULL)
+      { BZ_SETERR(BZ_PARAM_ERROR); return; };
+
+   BZ_SETERR(BZ_OK);
+   *nUnused = bzf->strm.avail_in;
+   *unused = bzf->strm.next_in;
+}