Remove third_party/bsdiff from the tree.

third_party/bsdiff/mbsdiff.cc

Index: third_party/bsdiff/mbsdiff.cc
diff --git a/third_party/bsdiff/mbsdiff.cc b/third_party/bsdiff/mbsdiff.cc
deleted file mode 100644
index 1dcd35e9d4cef7b1356711a7d57cc640a6542e92..0000000000000000000000000000000000000000
--- a/third_party/bsdiff/mbsdiff.cc
+++ /dev/null
@@ -1,382 +0,0 @@
-/*
-  bsdiff.c -- Binary patch generator.
-
-  Copyright 2003 Colin Percival
-
-  For the terms under which this work may be distributed, please see
-  the adjoining file "LICENSE".
-
-  ChangeLog:
-  2005-05-05 - Use the modified header struct from bspatch.h; use 32-bit
-               values throughout.
-                 --Benjamin Smedberg <benjamin@smedbergs.us>
-  2005-05-18 - Use the same CRC algorithm as bzip2, and leverage the CRC table
-               provided by libbz2.
-                 --Darin Fisher <darin@meer.net>
-  2007-11-14 - Changed to use Crc from Lzma library instead of Bzip library
-                 --Rahul Kuchhal
-*/
-
-#include "mbspatch.h"
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include <fcntl.h>
-#include <stdarg.h>
-#ifdef _WIN32
-#include <io.h>
-#include <winsock2.h>
-#else
-#include <unistd.h>
-#include <arpa/inet.h>
-#define _O_BINARY 0
-#endif
-
-#undef MIN
-#define MIN(x,y) (((x)<(y)) ? (x) : (y))
-
-static void
-reporterr(int e, const char *fmt, ...)
-{
-	if (fmt) {
-		va_list args;
-		va_start(args, fmt);
-		vfprintf(stderr, fmt, args);
-		va_end(args);
-	}
-
-	exit(e);
-}
-
-static void
-split(int *I,int *V,int start,int len,int h)
-{
-	int 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(int *I,int *V,unsigned char *old,int oldsize)
-{
-	int buckets[256];
-	int i,h,len;
-
-	for(i=0;i<256;i++) buckets[i]=0;
-	for(i=0;i<oldsize;i++) buckets[old[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[old[i]]]=i;
-	I[0]=oldsize;
-	for(i=0;i<oldsize;i++) V[i]=buckets[old[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 int
-matchlen(unsigned char *old,int oldsize,unsigned char *newbuf,int newsize)
-{
-	int i;
-
-	for(i=0;(i<oldsize)&&(i<newsize);i++)
-		if(old[i]!=newbuf[i]) break;
-
-	return i;
-}
-
-static int
-search(int *I,unsigned char *old,int oldsize,
-       unsigned char *newbuf,int newsize,int st,int en,int *pos)
-{
-	int x,y;
-
-	if(en-st<2) {
-		x=matchlen(old+I[st],oldsize-I[st],newbuf,newsize);
-		y=matchlen(old+I[en],oldsize-I[en],newbuf,newsize);
-
-		if(x>y) {
-			*pos=I[st];
-			return x;
-		} else {
-			*pos=I[en];
-			return y;
-		}
-	};
-
-	x=st+(en-st)/2;
-	if(memcmp(old+I[x],newbuf,MIN(oldsize-I[x],newsize))<0) {
-		return search(I,old,oldsize,newbuf,newsize,x,en,pos);
-	} else {
-		return search(I,old,oldsize,newbuf,newsize,st,x,pos);
-	};
-}
-
-int main(int argc,char *argv[])
-{
-	int fd;
-	unsigned char *old,*newbuf;
-	int oldsize,newsize;
-	int *I,*V;
-
-	int scan,pos,len;
-	int lastscan,lastpos,lastoffset;
-	int oldscore,scsc;
-
-	int s,Sf,lenf,Sb,lenb;
-	int overlap,Ss,lens;
-	int i;
-
-	int dblen,eblen;
-	unsigned char *db,*eb;
-
-	unsigned int scrc;
-
-	MBSPatchHeader header = {
-		{'M','B','D','I','F','F','1','0'},
-		0, 0, 0, 0, 0, 0
-	};
-
-	int numtriples;
-
-	if(argc!=4)
-		reporterr(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|_O_BINARY,0))<0) ||
-		((oldsize=lseek(fd,0,SEEK_END))==-1) ||
-		((old=(unsigned char*) malloc(oldsize+1))==NULL) ||
-		(lseek(fd,0,SEEK_SET)!=0) ||
-		(read(fd,old,oldsize)!=oldsize) ||
-		(close(fd)==-1))
-		reporterr(1,"%s\n",argv[1]);
-
-	scrc = CalculateCrc(old, oldsize);
-
-	if(((I=(int*) malloc((oldsize+1)*sizeof(int)))==NULL) ||
-		((V=(int*) malloc((oldsize+1)*sizeof(int)))==NULL))
-		reporterr(1,NULL);
-
-	qsufsort(I,V,old,oldsize);
-
-	free(V);
-
-	/* 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|_O_BINARY,0))<0) ||
-		((newsize=lseek(fd,0,SEEK_END))==-1) ||
-		((newbuf=(unsigned char*) malloc(newsize+1))==NULL) ||
-		(lseek(fd,0,SEEK_SET)!=0) ||
-		(read(fd,newbuf,newsize)!=newsize) ||
-		(close(fd)==-1)) reporterr(1,"%s\n",argv[2]);
-
-	if(((db=(unsigned char*) malloc(newsize+1))==NULL) ||
-		((eb=(unsigned char*) malloc(newsize+1))==NULL))
-		reporterr(1,NULL);
-
-	dblen=0;
-	eblen=0;
-
-	if((fd=open(argv[3],O_CREAT|O_TRUNC|O_WRONLY|_O_BINARY,0666))<0)
-		reporterr(1,"%s\n",argv[3]);
-
-	/* start writing here */
-
-	/* We don't know the lengths yet, so we will write the header again
-		 at the end */
-
-	if(write(fd,&header,sizeof(MBSPatchHeader))!=sizeof(MBSPatchHeader))
-		reporterr(1,"%s\n",argv[3]);
-
-	scan=0;len=0;
-	lastscan=0;lastpos=0;lastoffset=0;
-	numtriples = 0;
-	while(scan<newsize) {
-		oldscore=0;
-
-		for(scsc=scan+=len;scan<newsize;scan++) {
-			len=search(I,old,oldsize,newbuf+scan,newsize-scan,
-					0,oldsize,&pos);
-
-			for(;scsc<scan+len;scsc++)
-			if((scsc+lastoffset<oldsize) &&
-				(old[scsc+lastoffset] == newbuf[scsc]))
-				oldscore++;
-
-			if(((len==oldscore) && (len!=0)) || 
-				(len>oldscore+8)) break;
-
-			if((scan+lastoffset<oldsize) &&
-				(old[scan+lastoffset] == newbuf[scan]))
-				oldscore--;
-		};
-
-		if((len!=oldscore) || (scan==newsize)) {
-			MBSPatchTriple triple;
-
-			s=0;Sf=0;lenf=0;
-			for(i=0;(lastscan+i<scan)&&(lastpos+i<oldsize);) {
-				if(old[lastpos+i]==newbuf[lastscan+i]) s++;
-				i++;
-				if(s*2-i>Sf*2-lenf) { Sf=s; lenf=i; };
-			};
-
-			lenb=0;
-			if(scan<newsize) {
-				s=0;Sb=0;
-				for(i=1;(scan>=lastscan+i)&&(pos>=i);i++) {
-					if(old[pos-i]==newbuf[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(newbuf[lastscan+lenf-overlap+i]==
-					   old[lastpos+lenf-overlap+i]) s++;
-					if(newbuf[scan-lenb+i]==
-					   old[pos-lenb+i]) s--;
-					if(s>Ss) { Ss=s; lens=i+1; };
-				};
-
-				lenf+=lens-overlap;
-				lenb-=lens;
-			};
-
-			for(i=0;i<lenf;i++)
-				db[dblen+i]=newbuf[lastscan+i]-old[lastpos+i];
-			for(i=0;i<(scan-lenb)-(lastscan+lenf);i++)
-				eb[eblen+i]=newbuf[lastscan+lenf+i];
-
-			dblen+=lenf;
-			eblen+=(scan-lenb)-(lastscan+lenf);
-
-			triple.x = htonl(lenf);
-			triple.y = htonl((scan-lenb)-(lastscan+lenf));
-			triple.z = htonl((pos-lenb)-(lastpos+lenf));
-			if (write(fd,&triple,sizeof(triple)) != sizeof(triple))
-				reporterr(1,NULL);
-
-#ifdef DEBUG_bsmedberg
-			printf("Writing a block:\n"
-			       "	X: %u\n"
-			       "	Y: %u\n"
-			       "	Z: %i\n",
-			       (int) lenf,
-			       (int) ((scan-lenb)-(lastscan+lenf)),
-			       (int) ((pos-lenb)-(lastpos+lenf)));
-#endif
-
-			++numtriples;
-
-			lastscan=scan-lenb;
-			lastpos=pos-lenb;
-			lastoffset=pos-scan;
-		};
-	};
-
-	if(write(fd,db,dblen)!=dblen)
-		reporterr(1,NULL);
-
-	if(write(fd,eb,eblen)!=eblen)
-		reporterr(1,NULL);
-
-	header.slen	= htonl(oldsize);
-	header.scrc32	= htonl(scrc);
-	header.dlen	= htonl(newsize);
-	header.cblen	= htonl(numtriples * sizeof(MBSPatchTriple));
-	header.difflen	= htonl(dblen);
-	header.extralen = htonl(eblen);
-
-	if (lseek(fd,0,SEEK_SET) == -1 ||
-	    write(fd,&header,sizeof(header)) != sizeof(header) ||
-	    close(fd) == -1)
-		reporterr(1,NULL);
-
-	free(db);
-	free(eb);
-	free(I);
-	free(old);
-	free(newbuf);
-
-	return 0;
-}