initial commit
This commit is contained in:
@@ -0,0 +1,11 @@
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.deps/*
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||||
.libs/*
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||||
*.lo
|
||||
*.o
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||||
.dirstamp
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Makefile-bsdiff.am.inc
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AUTHORS
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||||
NEWS
|
||||
README
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||||
ChangeLog
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||||
COPYING
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||||
@@ -0,0 +1,10 @@
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set(BSDIFF_SOURCE_FILES
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bsdiff.h
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bsdiff.c
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bspatch.h
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bspatch.c
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)
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add_library(libbsdiff STATIC
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${BSDIFF_SOURCE_FILES}
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)
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@@ -0,0 +1,24 @@
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Copyright 2003-2005 Colin Percival
|
||||
Copyright 2012 Matthew Endsley
|
||||
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.
|
||||
@@ -0,0 +1,32 @@
|
||||
# Copyright (C) 2015 Giuseppe Scrivano <gscrivan@redhat.com>
|
||||
#
|
||||
# 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.
|
||||
#
|
||||
|
||||
EXTRA_DIST += $(libbsdiff_srcpath)/bsdiff.h $(libbsdiff_srcpath)/bspatch.h $(libbsdiff_srcpath)/LICENSE $(libbsdiff_srcpath)/README.md
|
||||
|
||||
libbsdiff_la_SOURCES = \
|
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$(libbsdiff_srcpath)/bsdiff.c \
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$(libbsdiff_srcpath)/bspatch.c \
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||||
$(NULL)
|
||||
|
||||
libbsdiff_la_CFLAGS = $(AM_CFLAGS)
|
||||
@@ -0,0 +1,11 @@
|
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bin_PROGRAMS = bsdiff bspatch
|
||||
|
||||
bsdiff_SOURCES = bsdiff.c
|
||||
|
||||
bspatch_SOURCES = bspatch.c
|
||||
|
||||
bsdiff_CFLAGS = -DBSDIFF_EXECUTABLE
|
||||
bspatch_CFLAGS = -DBSPATCH_EXECUTABLE
|
||||
|
||||
EXTRA_DIST = bsdiff.h bspatch.h
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|
||||
@@ -0,0 +1,129 @@
|
||||
bsdiff/bspatch
|
||||
==============
|
||||
bsdiff and bspatch are libraries for building and applying patches to binary
|
||||
files.
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||||
|
||||
The original algorithm and implementation was developed by Colin Percival. The
|
||||
algorithm is detailed in his paper, [Naïve Differences of Executable Code](http://www.daemonology.net/papers/bsdiff.pdf). For more information, visit his
|
||||
website at <http://www.daemonology.net/bsdiff/>.
|
||||
|
||||
I maintain this project separately from Colin's work, with the goal of making
|
||||
the core functionality easily embeddable in existing projects.
|
||||
|
||||
Contact
|
||||
-------
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||||
[@MatthewEndsley](https://twitter.com/#!/MatthewEndsley)
|
||||
<https://github.com/mendsley/bsdiff>
|
||||
|
||||
License
|
||||
-------
|
||||
Copyright 2003-2005 Colin Percival
|
||||
Copyright 2012 Matthew Endsley
|
||||
|
||||
This project is governed by the BSD 2-clause license. For details see the file
|
||||
titled LICENSE in the project root folder.
|
||||
|
||||
Overview
|
||||
--------
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||||
There are two separate libraries in the project, bsdiff and bspatch. Each are
|
||||
self contained in bsdiff.c and bspatch.c The easiest way to integrate is to
|
||||
simply copy the c file to your source folder and build it.
|
||||
|
||||
The overarching goal was to modify the original bsdiff/bspatch code from Colin
|
||||
and eliminate external dependencies and provide a simple interface to the core
|
||||
functionality.
|
||||
|
||||
I've exposed relevant functions via the `_stream` classes. The only external
|
||||
dependency not exposed is `memcmp` in `bsdiff`.
|
||||
|
||||
This library generates patches that are not compatible with the original bsdiff
|
||||
tool. The incompatibilities were motivated by the patching needs for the game
|
||||
AirMech <https://www.carbongames.com> and the following requirements:
|
||||
|
||||
* Eliminate/minimize any seek operations when applying patches
|
||||
* Eliminate any required disk I/O and support embedded streams
|
||||
* Ability to easily embed the routines as a library instead of an external binary
|
||||
* Compile+run on all platforms we use to build the game (Windows, Linux, NaCl, OSX)
|
||||
|
||||
Compiling
|
||||
---------
|
||||
The libraries should compile warning free in any moderately recent version of
|
||||
gcc. The project uses `<stdint.h>` which is technically a C99 file and not
|
||||
available in Microsoft Visual Studio. The easiest solution here is to use the
|
||||
msinttypes version of stdint.h from <https://code.google.com/p/msinttypes/>.
|
||||
The direct link for the lazy people is:
|
||||
<https://msinttypes.googlecode.com/svn/trunk/stdint.h>.
|
||||
|
||||
If your compiler does not provide an implementation of `<stdint.h>` you can
|
||||
remove the header from the bsdiff/bspatch files and provide your own typedefs
|
||||
for the following symbols: `uint8_t`, `uint64_t` and `int64_t`.
|
||||
|
||||
Examples
|
||||
--------
|
||||
Each project has an optional main function that serves as an example for using
|
||||
the library. Simply defined `BSDIFF_EXECUTABLE` or `BSPATCH_EXECUTABLE` to
|
||||
enable building the standalone tools.
|
||||
|
||||
Reference
|
||||
---------
|
||||
### bsdiff
|
||||
|
||||
struct bsdiff_stream
|
||||
{
|
||||
void* opaque;
|
||||
void* (*malloc)(size_t size);
|
||||
void (*free)(void* ptr);
|
||||
int (*write)(struct bsdiff_stream* stream,
|
||||
const void* buffer, int size);
|
||||
};
|
||||
|
||||
int bsdiff(const uint8_t* old, int64_t oldsize, const uint8_t* new,
|
||||
int64_t newsize, struct bsdiff_stream* stream);
|
||||
|
||||
|
||||
In order to use `bsdiff`, you need to define functions for allocating memory and
|
||||
writing binary data. This behavior is controlled by the `stream` parameter
|
||||
passed to to `bsdiff(...)`.
|
||||
|
||||
The `opaque` field is never read or modified from within the `bsdiff` function.
|
||||
The caller can use this field to store custom state data needed for the callback
|
||||
functions.
|
||||
|
||||
The `malloc` and `free` members should point to functions that behave like the
|
||||
standard `malloc` and `free` C functions.
|
||||
|
||||
The `write` function is called by bsdiff to write a block of binary data to the
|
||||
stream. The return value for `write` should be `0` on success and non-zero if
|
||||
the callback failed to write all data. In the default example, bzip2 is used to
|
||||
compress output data.
|
||||
|
||||
`bsdiff` returns `0` on success and `-1` on failure.
|
||||
|
||||
### bspatch
|
||||
|
||||
struct bspatch_stream
|
||||
{
|
||||
void* opaque;
|
||||
int (*read)(const struct bspatch_stream* stream,
|
||||
void* buffer, int length);
|
||||
};
|
||||
|
||||
int bspatch(const uint8_t* old, int64_t oldsize, uint8_t* new,
|
||||
int64_t newsize, struct bspatch_stream* stream);
|
||||
|
||||
The `bspatch` function transforms the data for a file using data generated from
|
||||
`bsdiff`. The caller takes care of loading the old file and allocating space for
|
||||
new file data. The `stream` parameter controls the process for reading binary
|
||||
patch data.
|
||||
|
||||
The `opaque` field is never read or modified from within the bspatch function.
|
||||
The caller can use this field to store custom state data needed for the read
|
||||
function.
|
||||
|
||||
The `read` function is called by `bspatch` to read a block of binary data from
|
||||
the stream. The return value for `read` should be `0` on success and non-zero
|
||||
if the callback failed to read the requested amount of data. In the default
|
||||
example, bzip2 is used to decompress input data.
|
||||
|
||||
`bspatch` returns `0` on success and `-1` on failure. On success, `new` contains
|
||||
the data for the patched file.
|
||||
@@ -0,0 +1,6 @@
|
||||
#!/bin/sh
|
||||
|
||||
touch AUTHORS NEWS README ChangeLog
|
||||
cp LICENSE COPYING
|
||||
|
||||
autoreconf -fis
|
||||
+445
@@ -0,0 +1,445 @@
|
||||
/*-
|
||||
* Copyright 2003-2005 Colin Percival
|
||||
* Copyright 2012 Matthew Endsley
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include "bsdiff.h"
|
||||
|
||||
#include <limits.h>
|
||||
#include <string.h>
|
||||
|
||||
#define MIN(x,y) (((x)<(y)) ? (x) : (y))
|
||||
|
||||
static void split(int64_t *I,int64_t *V,int64_t start,int64_t len,int64_t h)
|
||||
{
|
||||
int64_t i,j,k,x,tmp,jj,kk;
|
||||
|
||||
if(len<16) {
|
||||
for(k=start;k<start+len;k+=j) {
|
||||
j=1;x=V[I[k]+h];
|
||||
for(i=1;k+i<start+len;i++) {
|
||||
if(V[I[k+i]+h]<x) {
|
||||
x=V[I[k+i]+h];
|
||||
j=0;
|
||||
};
|
||||
if(V[I[k+i]+h]==x) {
|
||||
tmp=I[k+j];I[k+j]=I[k+i];I[k+i]=tmp;
|
||||
j++;
|
||||
};
|
||||
};
|
||||
for(i=0;i<j;i++) V[I[k+i]]=k+j-1;
|
||||
if(j==1) I[k]=-1;
|
||||
};
|
||||
return;
|
||||
};
|
||||
|
||||
x=V[I[start+len/2]+h];
|
||||
jj=0;kk=0;
|
||||
for(i=start;i<start+len;i++) {
|
||||
if(V[I[i]+h]<x) jj++;
|
||||
if(V[I[i]+h]==x) kk++;
|
||||
};
|
||||
jj+=start;kk+=jj;
|
||||
|
||||
i=start;j=0;k=0;
|
||||
while(i<jj) {
|
||||
if(V[I[i]+h]<x) {
|
||||
i++;
|
||||
} else if(V[I[i]+h]==x) {
|
||||
tmp=I[i];I[i]=I[jj+j];I[jj+j]=tmp;
|
||||
j++;
|
||||
} else {
|
||||
tmp=I[i];I[i]=I[kk+k];I[kk+k]=tmp;
|
||||
k++;
|
||||
};
|
||||
};
|
||||
|
||||
while(jj+j<kk) {
|
||||
if(V[I[jj+j]+h]==x) {
|
||||
j++;
|
||||
} else {
|
||||
tmp=I[jj+j];I[jj+j]=I[kk+k];I[kk+k]=tmp;
|
||||
k++;
|
||||
};
|
||||
};
|
||||
|
||||
if(jj>start) split(I,V,start,jj-start,h);
|
||||
|
||||
for(i=0;i<kk-jj;i++) V[I[jj+i]]=kk-1;
|
||||
if(jj==kk-1) I[jj]=-1;
|
||||
|
||||
if(start+len>kk) split(I,V,kk,start+len-kk,h);
|
||||
}
|
||||
|
||||
static void qsufsort(int64_t *I,int64_t *V,const uint8_t *oldBuff,int64_t oldsize)
|
||||
{
|
||||
int64_t buckets[256];
|
||||
int64_t i,h,len;
|
||||
|
||||
for(i=0;i<256;i++) buckets[i]=0;
|
||||
for(i=0;i<oldsize;i++) buckets[oldBuff[i]]++;
|
||||
for(i=1;i<256;i++) buckets[i]+=buckets[i-1];
|
||||
for(i=255;i>0;i--) buckets[i]=buckets[i-1];
|
||||
buckets[0]=0;
|
||||
|
||||
for(i=0;i<oldsize;i++) I[++buckets[oldBuff[i]]]=i;
|
||||
I[0]=oldsize;
|
||||
for(i=0;i<oldsize;i++) V[i]=buckets[oldBuff[i]];
|
||||
V[oldsize]=0;
|
||||
for(i=1;i<256;i++) if(buckets[i]==buckets[i-1]+1) I[buckets[i]]=-1;
|
||||
I[0]=-1;
|
||||
|
||||
for(h=1;I[0]!=-(oldsize+1);h+=h) {
|
||||
len=0;
|
||||
for(i=0;i<oldsize+1;) {
|
||||
if(I[i]<0) {
|
||||
len-=I[i];
|
||||
i-=I[i];
|
||||
} else {
|
||||
if(len) I[i-len]=-len;
|
||||
len=V[I[i]]+1-i;
|
||||
split(I,V,i,len,h);
|
||||
i+=len;
|
||||
len=0;
|
||||
};
|
||||
};
|
||||
if(len) I[i-len]=-len;
|
||||
};
|
||||
|
||||
for(i=0;i<oldsize+1;i++) I[V[i]]=i;
|
||||
}
|
||||
|
||||
static int64_t matchlen(const uint8_t *oldBuff,int64_t oldsize,const uint8_t *newBuff,int64_t newsize)
|
||||
{
|
||||
int64_t i;
|
||||
|
||||
for(i=0;(i<oldsize)&&(i<newsize);i++)
|
||||
if(oldBuff[i]!=newBuff[i]) break;
|
||||
|
||||
return i;
|
||||
}
|
||||
|
||||
static int64_t search(const int64_t *I,const uint8_t *oldBuff,int64_t oldsize,
|
||||
const uint8_t *newBuff,int64_t newsize,int64_t st,int64_t en,int64_t *pos)
|
||||
{
|
||||
int64_t x,y;
|
||||
|
||||
if(en-st<2) {
|
||||
x=matchlen(oldBuff+I[st],oldsize-I[st],newBuff,newsize);
|
||||
y=matchlen(oldBuff+I[en],oldsize-I[en],newBuff,newsize);
|
||||
|
||||
if(x>y) {
|
||||
*pos=I[st];
|
||||
return x;
|
||||
} else {
|
||||
*pos=I[en];
|
||||
return y;
|
||||
}
|
||||
};
|
||||
|
||||
x=st+(en-st)/2;
|
||||
if(memcmp(oldBuff+I[x],newBuff,MIN(oldsize-I[x],newsize))<0) {
|
||||
return search(I,oldBuff,oldsize,newBuff,newsize,x,en,pos);
|
||||
} else {
|
||||
return search(I,oldBuff,oldsize,newBuff,newsize,st,x,pos);
|
||||
};
|
||||
}
|
||||
|
||||
static void offtout(int64_t x,uint8_t *buf)
|
||||
{
|
||||
int64_t y;
|
||||
|
||||
if(x<0) y=-x; else y=x;
|
||||
|
||||
buf[0]=y%256;y-=buf[0];
|
||||
y=y/256;buf[1]=y%256;y-=buf[1];
|
||||
y=y/256;buf[2]=y%256;y-=buf[2];
|
||||
y=y/256;buf[3]=y%256;y-=buf[3];
|
||||
y=y/256;buf[4]=y%256;y-=buf[4];
|
||||
y=y/256;buf[5]=y%256;y-=buf[5];
|
||||
y=y/256;buf[6]=y%256;y-=buf[6];
|
||||
y=y/256;buf[7]=y%256;
|
||||
|
||||
if(x<0) buf[7]|=0x80;
|
||||
}
|
||||
|
||||
static int64_t writedata(struct bsdiff_stream* stream, const void* buffer, int64_t length)
|
||||
{
|
||||
int64_t result = 0;
|
||||
|
||||
while (length > 0)
|
||||
{
|
||||
const int smallsize = (int)MIN(length, INT_MAX);
|
||||
const int writeresult = stream->write(stream, buffer, smallsize);
|
||||
if (writeresult == -1)
|
||||
{
|
||||
return -1;
|
||||
}
|
||||
|
||||
result += writeresult;
|
||||
length -= smallsize;
|
||||
buffer = (uint8_t*)buffer + smallsize;
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
struct bsdiff_request
|
||||
{
|
||||
const uint8_t* oldBuff;
|
||||
int64_t oldsize;
|
||||
const uint8_t* newBuff;
|
||||
int64_t newsize;
|
||||
struct bsdiff_stream* stream;
|
||||
int64_t *I;
|
||||
uint8_t *buffer;
|
||||
};
|
||||
|
||||
static int bsdiff_internal(const struct bsdiff_request req)
|
||||
{
|
||||
int64_t *I,*V;
|
||||
int64_t scan,pos,len;
|
||||
int64_t lastscan,lastpos,lastoffset;
|
||||
int64_t oldscore,scsc;
|
||||
int64_t s,Sf,lenf,Sb,lenb;
|
||||
int64_t overlap,Ss,lens;
|
||||
int64_t i;
|
||||
uint8_t *buffer;
|
||||
uint8_t buf[8 * 3];
|
||||
|
||||
if((V=req.stream->malloc((req.oldsize+1)*sizeof(int64_t)))==NULL) return -1;
|
||||
I = req.I;
|
||||
|
||||
qsufsort(I,V,req.oldBuff,req.oldsize);
|
||||
req.stream->free(V);
|
||||
|
||||
buffer = req.buffer;
|
||||
|
||||
/* Compute the differences, writing ctrl as we go */
|
||||
scan=0;len=0;pos=0;
|
||||
lastscan=0;lastpos=0;lastoffset=0;
|
||||
while(scan<req.newsize) {
|
||||
oldscore=0;
|
||||
|
||||
for(scsc=scan+=len;scan<req.newsize;scan++) {
|
||||
len=search(I,req.oldBuff,req.oldsize,req.newBuff+scan,req.newsize-scan,
|
||||
0,req.oldsize,&pos);
|
||||
|
||||
for(;scsc<scan+len;scsc++)
|
||||
if((scsc+lastoffset<req.oldsize) &&
|
||||
(req.oldBuff[scsc+lastoffset] == req.newBuff[scsc]))
|
||||
oldscore++;
|
||||
|
||||
if(((len==oldscore) && (len!=0)) ||
|
||||
(len>oldscore+8)) break;
|
||||
|
||||
if((scan+lastoffset<req.oldsize) &&
|
||||
(req.oldBuff[scan+lastoffset] == req.newBuff[scan]))
|
||||
oldscore--;
|
||||
};
|
||||
|
||||
if((len!=oldscore) || (scan==req.newsize)) {
|
||||
s=0;Sf=0;lenf=0;
|
||||
for(i=0;(lastscan+i<scan)&&(lastpos+i<req.oldsize);) {
|
||||
if(req.oldBuff[lastpos+i]==req.newBuff[lastscan+i]) s++;
|
||||
i++;
|
||||
if(s*2-i>Sf*2-lenf) { Sf=s; lenf=i; };
|
||||
};
|
||||
|
||||
lenb=0;
|
||||
if(scan<req.newsize) {
|
||||
s=0;Sb=0;
|
||||
for(i=1;(scan>=lastscan+i)&&(pos>=i);i++) {
|
||||
if(req.oldBuff[pos-i]==req.newBuff[scan-i]) s++;
|
||||
if(s*2-i>Sb*2-lenb) { Sb=s; lenb=i; };
|
||||
};
|
||||
};
|
||||
|
||||
if(lastscan+lenf>scan-lenb) {
|
||||
overlap=(lastscan+lenf)-(scan-lenb);
|
||||
s=0;Ss=0;lens=0;
|
||||
for(i=0;i<overlap;i++) {
|
||||
if(req.newBuff[lastscan+lenf-overlap+i]==
|
||||
req.oldBuff[lastpos+lenf-overlap+i]) s++;
|
||||
if(req.newBuff[scan-lenb+i]==
|
||||
req.oldBuff[pos-lenb+i]) s--;
|
||||
if(s>Ss) { Ss=s; lens=i+1; };
|
||||
};
|
||||
|
||||
lenf+=lens-overlap;
|
||||
lenb-=lens;
|
||||
};
|
||||
|
||||
offtout(lenf,buf);
|
||||
offtout((scan-lenb)-(lastscan+lenf),buf+8);
|
||||
offtout((pos-lenb)-(lastpos+lenf),buf+16);
|
||||
|
||||
/* Write control data */
|
||||
if (writedata(req.stream, buf, sizeof(buf)))
|
||||
return -1;
|
||||
|
||||
/* Write diff data */
|
||||
for(i=0;i<lenf;i++)
|
||||
buffer[i]=req.newBuff[lastscan+i]-req.oldBuff[lastpos+i];
|
||||
if (writedata(req.stream, buffer, lenf))
|
||||
return -1;
|
||||
|
||||
/* Write extra data */
|
||||
for(i=0;i<(scan-lenb)-(lastscan+lenf);i++)
|
||||
buffer[i]=req.newBuff[lastscan+lenf+i];
|
||||
if (writedata(req.stream, buffer, (scan-lenb)-(lastscan+lenf)))
|
||||
return -1;
|
||||
|
||||
lastscan=scan-lenb;
|
||||
lastpos=pos-lenb;
|
||||
lastoffset=pos-scan;
|
||||
};
|
||||
};
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int bsdiff(const uint8_t* oldBuff, int64_t oldsize, const uint8_t* newBuff, int64_t newsize, struct bsdiff_stream* stream)
|
||||
{
|
||||
int result;
|
||||
struct bsdiff_request req;
|
||||
|
||||
if((req.I=stream->malloc((oldsize+1)*sizeof(int64_t)))==NULL)
|
||||
return -1;
|
||||
|
||||
if((req.buffer=stream->malloc(newsize+1))==NULL)
|
||||
{
|
||||
stream->free(req.I);
|
||||
return -1;
|
||||
}
|
||||
|
||||
req.oldBuff = oldBuff;
|
||||
req.oldsize = oldsize;
|
||||
req.newBuff = newBuff;
|
||||
req.newsize = newsize;
|
||||
req.stream = stream;
|
||||
|
||||
result = bsdiff_internal(req);
|
||||
|
||||
stream->free(req.buffer);
|
||||
stream->free(req.I);
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
#if defined(BSDIFF_EXECUTABLE)
|
||||
|
||||
#include <sys/types.h>
|
||||
|
||||
#include <bzlib.h>
|
||||
#include <err.h>
|
||||
#include <fcntl.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <unistd.h>
|
||||
|
||||
static int bz2_write(struct bsdiff_stream* stream, const void* buffer, int size)
|
||||
{
|
||||
int bz2err;
|
||||
BZFILE* bz2;
|
||||
|
||||
bz2 = (BZFILE*)stream->opaque;
|
||||
BZ2_bzWrite(&bz2err, bz2, (void*)buffer, size);
|
||||
if (bz2err != BZ_STREAM_END && bz2err != BZ_OK)
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int main(int argc,char *argv[])
|
||||
{
|
||||
int fd;
|
||||
int bz2err;
|
||||
uint8_t *oldBuff,*new;
|
||||
off_t oldsize,newsize;
|
||||
uint8_t buf[8];
|
||||
FILE * pf;
|
||||
struct bsdiff_stream stream;
|
||||
BZFILE* bz2;
|
||||
|
||||
memset(&bz2, 0, sizeof(bz2));
|
||||
stream.malloc = malloc;
|
||||
stream.free = free;
|
||||
stream.write = bz2_write;
|
||||
|
||||
if(argc!=4) errx(1,"usage: %s oldfile newfile patchfile\n",argv[0]);
|
||||
|
||||
/* Allocate oldsize+1 bytes instead of oldsize bytes to ensure
|
||||
that we never try to malloc(0) and get a NULL pointer */
|
||||
if(((fd=open(argv[1],O_RDONLY,0))<0) ||
|
||||
((oldsize=lseek(fd,0,SEEK_END))==-1) ||
|
||||
((oldBuff=malloc(oldsize+1))==NULL) ||
|
||||
(lseek(fd,0,SEEK_SET)!=0) ||
|
||||
(read(fd,oldBuff,oldsize)!=oldsize) ||
|
||||
(close(fd)==-1)) err(1,"%s",argv[1]);
|
||||
|
||||
|
||||
/* Allocate newsize+1 bytes instead of newsize bytes to ensure
|
||||
that we never try to malloc(0) and get a NULL pointer */
|
||||
if(((fd=open(argv[2],O_RDONLY,0))<0) ||
|
||||
((newsize=lseek(fd,0,SEEK_END))==-1) ||
|
||||
((new=malloc(newsize+1))==NULL) ||
|
||||
(lseek(fd,0,SEEK_SET)!=0) ||
|
||||
(read(fd,new,newsize)!=newsize) ||
|
||||
(close(fd)==-1)) err(1,"%s",argv[2]);
|
||||
|
||||
/* Create the patch file */
|
||||
if ((pf = fopen(argv[3], "w")) == NULL)
|
||||
err(1, "%s", argv[3]);
|
||||
|
||||
/* Write header (signature+newsize)*/
|
||||
offtout(newsize, buf);
|
||||
if (fwrite("ENDSLEY/BSDIFF43", 16, 1, pf) != 1 ||
|
||||
fwrite(buf, sizeof(buf), 1, pf) != 1)
|
||||
err(1, "Failed to write header");
|
||||
|
||||
|
||||
if (NULL == (bz2 = BZ2_bzWriteOpen(&bz2err, pf, 9, 0, 0)))
|
||||
errx(1, "BZ2_bzWriteOpen, bz2err=%d", bz2err);
|
||||
|
||||
stream.opaque = bz2;
|
||||
if (bsdiff(oldBuff, oldsize, new, newsize, &stream))
|
||||
err(1, "bsdiff");
|
||||
|
||||
BZ2_bzWriteClose(&bz2err, bz2, 0, NULL, NULL);
|
||||
if (bz2err != BZ_OK)
|
||||
err(1, "BZ2_bzWriteClose, bz2err=%d", bz2err);
|
||||
|
||||
if (fclose(pf))
|
||||
err(1, "fclose");
|
||||
|
||||
/* Free the memory we used */
|
||||
free(oldBuff);
|
||||
free(new);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,45 @@
|
||||
/*-
|
||||
* Copyright 2003-2005 Colin Percival
|
||||
* Copyright 2012 Matthew Endsley
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef BSDIFF_H
|
||||
# define BSDIFF_H
|
||||
|
||||
# include <stddef.h>
|
||||
# include <stdint.h>
|
||||
|
||||
struct bsdiff_stream
|
||||
{
|
||||
void* opaque;
|
||||
|
||||
void* (*malloc)(size_t size);
|
||||
void (*free)(void* ptr);
|
||||
int (*write)(struct bsdiff_stream* stream, const void* buffer, int size);
|
||||
};
|
||||
|
||||
int bsdiff(const uint8_t* oldBuff, int64_t oldsize, const uint8_t* newBuff, int64_t newsize, struct bsdiff_stream* stream);
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,194 @@
|
||||
/*-
|
||||
* Copyright 2003-2005 Colin Percival
|
||||
* Copyright 2012 Matthew Endsley
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#include <limits.h>
|
||||
#include "bspatch.h"
|
||||
|
||||
static int64_t offtin(uint8_t *buf)
|
||||
{
|
||||
int64_t y;
|
||||
|
||||
y=buf[7]&0x7F;
|
||||
y=y*256;y+=buf[6];
|
||||
y=y*256;y+=buf[5];
|
||||
y=y*256;y+=buf[4];
|
||||
y=y*256;y+=buf[3];
|
||||
y=y*256;y+=buf[2];
|
||||
y=y*256;y+=buf[1];
|
||||
y=y*256;y+=buf[0];
|
||||
|
||||
if(buf[7]&0x80) y=-y;
|
||||
|
||||
return y;
|
||||
}
|
||||
|
||||
int bspatch(const uint8_t* oldBuffer, int64_t oldsize, uint8_t* newBuffer, int64_t newsize, struct bspatch_stream* stream)
|
||||
{
|
||||
uint8_t buf[8];
|
||||
int64_t oldpos,newpos;
|
||||
int64_t ctrl[3];
|
||||
int64_t i;
|
||||
|
||||
oldpos=0;newpos=0;
|
||||
while(newpos<newsize) {
|
||||
/* Read control data */
|
||||
for(i=0;i<=2;i++) {
|
||||
if (stream->read(stream, buf, 8))
|
||||
return -1;
|
||||
ctrl[i]=offtin(buf);
|
||||
};
|
||||
|
||||
/* Sanity-check */
|
||||
if (ctrl[0]<0 || ctrl[0]>INT_MAX ||
|
||||
ctrl[1]<0 || ctrl[1]>INT_MAX ||
|
||||
newpos+ctrl[0]>newsize)
|
||||
return -1;
|
||||
|
||||
/* Read diff string */
|
||||
if (stream->read(stream, newBuffer + newpos, ctrl[0]))
|
||||
return -1;
|
||||
|
||||
/* Add oldBuffer data to diff string */
|
||||
for(i=0;i<ctrl[0];i++)
|
||||
if((oldpos+i>=0) && (oldpos+i<oldsize))
|
||||
newBuffer[newpos+i]+=oldBuffer[oldpos+i];
|
||||
|
||||
/* Adjust pointers */
|
||||
newpos+=ctrl[0];
|
||||
oldpos+=ctrl[0];
|
||||
|
||||
/* Sanity-check */
|
||||
if(newpos+ctrl[1]>newsize)
|
||||
return -1;
|
||||
|
||||
/* Read extra string */
|
||||
if (stream->read(stream, newBuffer + newpos, ctrl[1]))
|
||||
return -1;
|
||||
|
||||
/* Adjust pointers */
|
||||
newpos+=ctrl[1];
|
||||
oldpos+=ctrl[2];
|
||||
};
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if defined(BSPATCH_EXECUTABLE)
|
||||
|
||||
#include <bzlib.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdint.h>
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <err.h>
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <unistd.h>
|
||||
#include <fcntl.h>
|
||||
|
||||
static int bz2_read(const struct bspatch_stream* stream, void* buffer, int length)
|
||||
{
|
||||
int n;
|
||||
int bz2err;
|
||||
BZFILE* bz2;
|
||||
|
||||
bz2 = (BZFILE*)stream->opaque;
|
||||
n = BZ2_bzRead(&bz2err, bz2, buffer, length);
|
||||
if (n != length)
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
int main(int argc,char * argv[])
|
||||
{
|
||||
FILE * f;
|
||||
int fd;
|
||||
int bz2err;
|
||||
uint8_t header[24];
|
||||
uint8_t *oldBuffer, *newBuffer;
|
||||
int64_t oldsize, newsize;
|
||||
BZFILE* bz2;
|
||||
struct bspatch_stream stream;
|
||||
struct stat sb;
|
||||
|
||||
if(argc!=4) errx(1,"usage: %s oldfile newfile patchfile\n",argv[0]);
|
||||
|
||||
/* Open patch file */
|
||||
if ((f = fopen(argv[3], "r")) == NULL)
|
||||
err(1, "fopen(%s)", argv[3]);
|
||||
|
||||
/* Read header */
|
||||
if (fread(header, 1, 24, f) != 24) {
|
||||
if (feof(f))
|
||||
errx(1, "Corrupt patch\n");
|
||||
err(1, "fread(%s)", argv[3]);
|
||||
}
|
||||
|
||||
/* Check for appropriate magic */
|
||||
if (memcmp(header, "ENDSLEY/BSDIFF43", 16) != 0)
|
||||
errx(1, "Corrupt patch\n");
|
||||
|
||||
/* Read lengths from header */
|
||||
newsize=offtin(header+16);
|
||||
if(newsize<0)
|
||||
errx(1,"Corrupt patch\n");
|
||||
|
||||
/* Close patch file and re-open it via libbzip2 at the right places */
|
||||
if(((fd=open(argv[1],O_RDONLY,0))<0) ||
|
||||
((oldsize=lseek(fd,0,SEEK_END))==-1) ||
|
||||
((oldBuffer=malloc(oldsize+1))==NULL) ||
|
||||
(lseek(fd,0,SEEK_SET)!=0) ||
|
||||
(read(fd,oldBuffer,oldsize)!=oldsize) ||
|
||||
(fstat(fd, &sb)) ||
|
||||
(close(fd)==-1)) err(1,"%s",argv[1]);
|
||||
if((newBuffer=malloc(newsize+1))==NULL) err(1,NULL);
|
||||
|
||||
if (NULL == (bz2 = BZ2_bzReadOpen(&bz2err, f, 0, 0, NULL, 0)))
|
||||
errx(1, "BZ2_bzReadOpen, bz2err=%d", bz2err);
|
||||
|
||||
stream.read = bz2_read;
|
||||
stream.opaque = bz2;
|
||||
if (bspatch(oldBuffer, oldsize, newBuffer, newsize, &stream))
|
||||
errx(1, "bspatch");
|
||||
|
||||
/* Clean up the bzip2 reads */
|
||||
BZ2_bzReadClose(&bz2err, bz2);
|
||||
fclose(f);
|
||||
|
||||
/* Write the new file */
|
||||
if(((fd=open(argv[2],O_CREAT|O_TRUNC|O_WRONLY,sb.st_mode))<0) ||
|
||||
(write(fd,newBuffer,newsize)!=newsize) || (close(fd)==-1))
|
||||
err(1,"%s",argv[2]);
|
||||
|
||||
free(newBuffer);
|
||||
free(oldBuffer);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
@@ -0,0 +1,42 @@
|
||||
/*-
|
||||
* Copyright 2003-2005 Colin Percival
|
||||
* Copyright 2012 Matthew Endsley
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef BSPATCH_H
|
||||
# define BSPATCH_H
|
||||
|
||||
# include <stdint.h>
|
||||
|
||||
struct bspatch_stream
|
||||
{
|
||||
void* opaque;
|
||||
int (*read)(const struct bspatch_stream* stream, void* buffer, int length);
|
||||
};
|
||||
|
||||
int bspatch(const uint8_t* oldBuff, int64_t oldsize, uint8_t* newBuff, int64_t newsize, struct bspatch_stream* stream);
|
||||
|
||||
#endif
|
||||
|
||||
@@ -0,0 +1,30 @@
|
||||
# -*- Autoconf -*-
|
||||
# Process this file with autoconf to produce a configure script.
|
||||
|
||||
AC_PREREQ([2.69])
|
||||
AC_INIT([bsdiff], [0.1])
|
||||
AC_CONFIG_SRCDIR([bsdiff.c])
|
||||
AC_CONFIG_HEADERS([config.h])
|
||||
AM_INIT_AUTOMAKE([1.9])
|
||||
|
||||
# Checks for programs.
|
||||
AC_PROG_CC
|
||||
|
||||
# Checks for libraries.
|
||||
# FIXME: Replace `main' with a function in `-lbz2':
|
||||
AC_CHECK_LIB([bz2], [BZ2_bzReadOpen])
|
||||
|
||||
AC_CHECK_HEADERS([fcntl.h limits.h stddef.h stdint.h stdlib.h string.h unistd.h])
|
||||
|
||||
# Checks for typedefs, structures, and compiler characteristics.
|
||||
AC_TYPE_INT64_T
|
||||
AC_TYPE_OFF_T
|
||||
AC_TYPE_SIZE_T
|
||||
AC_TYPE_UINT8_T
|
||||
|
||||
# Checks for library functions.
|
||||
AC_FUNC_MALLOC
|
||||
AC_CHECK_FUNCS([memset])
|
||||
|
||||
AC_CONFIG_FILES([Makefile])
|
||||
AC_OUTPUT
|
||||
Reference in New Issue
Block a user