Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 198 insertions, 0 deletions

diff --git a/onlineupdate/source/update/updater/bspatch.cxx b/onlineupdate/source/update/updater/bspatch.cxx
new file mode 100644
index 000000000..219c4d74c
--- /dev/null
+++ b/onlineupdate/source/update/updater/bspatch.cxx
@@ -0,0 +1,198 @@
+/*-
+ * Copyright 2003,2004 Colin Percival
+ * All rights reserved
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted providing 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 ``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.
+ *
+ * Changelog:
+ * 2005-04-26 - Define the header as a C structure, add a CRC32 checksum to
+ *              the header, and make all the types 32-bit.
+ *                --Benjamin Smedberg <benjamin@smedbergs.us>
+ */
+
+#include "bspatch.h"
+#include "errors.h"
+
+#include <algorithm>
+#include <sys/stat.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <string.h>
+#include <limits.h>
+
+#if defined(_WIN32)
+# include <io.h>
+#else
+# include <unistd.h>
+#endif
+
+#ifdef _WIN32
+# include <winsock2.h>
+#else
+# include <arpa/inet.h>
+#endif
+
+#ifndef SSIZE_MAX
+# define SSIZE_MAX LONG_MAX
+#endif
+
+int
+MBS_ReadHeader(FILE* file, MBSPatchHeader *header)
+{
+    size_t s = fread(header, 1, sizeof(MBSPatchHeader), file);
+    if (s != sizeof(MBSPatchHeader))
+        return READ_ERROR;
+
+    header->slen      = ntohl(header->slen);
+    header->scrc32    = ntohl(header->scrc32);
+    header->dlen      = ntohl(header->dlen);
+    header->cblen     = ntohl(header->cblen);
+    header->difflen   = ntohl(header->difflen);
+    header->extralen  = ntohl(header->extralen);
+
+    struct stat hs;
+    s = fstat(fileno(file), &hs);
+    if (s)
+        return READ_ERROR;
+
+    if (memcmp(header->tag, "MBDIFF10", 8) != 0)
+        return UNEXPECTED_BSPATCH_ERROR;
+
+    if (sizeof(MBSPatchHeader) +
+            header->cblen +
+            header->difflen +
+            header->extralen != uint32_t(hs.st_size))
+        return UNEXPECTED_BSPATCH_ERROR;
+
+    return OK;
+}
+
+int
+MBS_ApplyPatch(const MBSPatchHeader *header, FILE* patchFile,
+               unsigned char *fbuffer, FILE* file)
+{
+    unsigned char *fbufend = fbuffer + header->slen;
+
+    unsigned char *buf = (unsigned char*) malloc(header->cblen +
+                         header->difflen +
+                         header->extralen);
+    if (!buf)
+        return BSPATCH_MEM_ERROR;
+
+    int rv = OK;
+
+    size_t r = header->cblen + header->difflen + header->extralen;
+    unsigned char *wb = buf;
+    while (r)
+    {
+        const size_t count = std::min(r, size_t(SSIZE_MAX));
+        size_t c = fread(wb, 1, count, patchFile);
+        if (c != count)
+        {
+            rv = READ_ERROR;
+            goto end;
+        }
+
+        r -= c;
+        wb += c;
+    }
+
+    {
+        MBSPatchTriple *ctrlsrc = (MBSPatchTriple*) buf;
+        unsigned char *diffsrc = buf + header->cblen;
+        unsigned char *extrasrc = diffsrc + header->difflen;
+
+        MBSPatchTriple *ctrlend = (MBSPatchTriple*) diffsrc;
+        unsigned char *diffend = extrasrc;
+        unsigned char *extraend = extrasrc + header->extralen;
+
+        do
+        {
+            ctrlsrc->x = ntohl(ctrlsrc->x);
+            ctrlsrc->y = ntohl(ctrlsrc->y);
+            ctrlsrc->z = ntohl(ctrlsrc->z);
+
+#ifdef DEBUG_bsmedberg
+            printf("Applying block:\n"
+                   " x: %u\n"
+                   " y: %u\n"
+                   " z: %i\n",
+                   ctrlsrc->x,
+                   ctrlsrc->y,
+                   ctrlsrc->z);
+#endif
+
+            /* Add x bytes from oldfile to x bytes from the diff block */
+
+            if (fbuffer + ctrlsrc->x > fbufend ||
+                    diffsrc + ctrlsrc->x > diffend)
+            {
+                rv = UNEXPECTED_BSPATCH_ERROR;
+                goto end;
+            }
+            for (uint32_t i = 0; i < ctrlsrc->x; ++i)
+            {
+                diffsrc[i] += fbuffer[i];
+            }
+            if ((uint32_t) fwrite(diffsrc, 1, ctrlsrc->x, file) != ctrlsrc->x)
+            {
+                rv = WRITE_ERROR_PATCH_FILE;
+                goto end;
+            }
+            fbuffer += ctrlsrc->x;
+            diffsrc += ctrlsrc->x;
+
+            /* Copy y bytes from the extra block */
+
+            if (extrasrc + ctrlsrc->y > extraend)
+            {
+                rv = UNEXPECTED_BSPATCH_ERROR;
+                goto end;
+            }
+            if ((uint32_t) fwrite(extrasrc, 1, ctrlsrc->y, file) != ctrlsrc->y)
+            {
+                rv = WRITE_ERROR_PATCH_FILE;
+                goto end;
+            }
+            extrasrc += ctrlsrc->y;
+
+            /* "seek" forwards in oldfile by z bytes */
+
+            if (fbuffer + ctrlsrc->z > fbufend)
+            {
+                rv = UNEXPECTED_BSPATCH_ERROR;
+                goto end;
+            }
+            fbuffer += ctrlsrc->z;
+
+            /* and on to the next control block */
+
+            ++ctrlsrc;
+        }
+        while (ctrlsrc < ctrlend);
+    }
+
+end:
+    free(buf);
+    return rv;
+}