WebSVN – vaca_plus – Blame – //vaca_plus/utils/source/bsdiff-4.3/win32/bsdiff.cpp

Rev	Author	Line No.	Line
23	h266	1	/*-
		2	* Copyright 2003-2005 Colin Percival
		3	* All rights reserved
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted providing that the following conditions
		7	* are met:
		8	* 1. Redistributions of source code must retain the above copyright
		9	* notice, this list of conditions and the following disclaimer.
		10	* 2. Redistributions in binary form must reproduce the above copyright
		11	* notice, this list of conditions and the following disclaimer in the
		12	* documentation and/or other materials provided with the distribution.
		13	*
		14	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
		15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
		16	* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
		17	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
		18	* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
		19	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
		20	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
		21	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
		22	* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
		23	* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
		24	* POSSIBILITY OF SUCH DAMAGE.
		25	*/
		26
		27
		28	#include <stdlib.h>
		29	#include "bzlib.h"
		30	#include <stdio.h>
		31	#include <string.h>
		32	//#include <err.h>
		33	//#include <unistd.h>
		34	#include <io.h>
		35	#include <fcntl.h>
		36	//#include <sys/wait.h>
		37
		38
		39	#include <windows.h>
		40	#include <process.h>
		41	#include <sys/types.h>
		42	typedef unsigned char u_char;
		43	typedef long pid_t;
		44
		45	template<class T>
		46	void err(int i, const char* str, T arg) {
		47	char lastErrorTxt[1024];
		48	FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM\|FORMAT_MESSAGE_IGNORE_INSERTS,NULL,GetLastError(),0,lastErrorTxt,1024,NULL);
		49	printf("%s",lastErrorTxt);
		50	printf(str, arg);
		51	exit(i);
		52	}
		53	void err(int i, const char* str) {
		54	char lastErrorTxt[1024];
		55	FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM\|FORMAT_MESSAGE_IGNORE_INSERTS,NULL,GetLastError(),0,lastErrorTxt,1024,NULL);
		56	printf("%s",lastErrorTxt);
		57	if (str!=NULL) {
		58	printf("%s",str);
		59	}
		60	exit(i);
		61	}
		62	template<class T>
		63	void errx(int i, const char* str, T arg) {
		64	printf(str, arg);
		65	exit(i);
		66	}
		67	void errx(int i, const char* str) {
		68	printf("%s",str);
		69	exit(i);
		70	}
		71
		72	#define MIN(x,y) (((x)<(y)) ? (x) : (y))
		73
		74	static void split(off_t I,off_t V,off_t start,off_t len,off_t h)
		75	{
		76	off_t i,j,k,x,tmp,jj,kk;
		77
		78	if(len<16) {
		79	for(k=start;k<start+len;k+=j) {
		80	j=1;x=V[I[k]+h];
		81	for(i=1;k+i<start+len;i++) {
		82	if(V[I[k+i]+h]<x) {
		83	x=V[I[k+i]+h];
		84	j=0;
		85	};
		86	if(V[I[k+i]+h]==x) {
		87	tmp=I[k+j];I[k+j]=I[k+i];I[k+i]=tmp;
		88	j++;
		89	};
		90	};
		91	for(i=0;i<j;i++) V[I[k+i]]=k+j-1;
		92	if(j==1) I[k]=-1;
		93	};
		94	return;
		95	};
		96
		97	x=V[I[start+len/2]+h];
		98	jj=0;kk=0;
		99	for(i=start;i<start+len;i++) {
		100	if(V[I[i]+h]<x) jj++;
		101	if(V[I[i]+h]==x) kk++;
		102	};
		103	jj+=start;kk+=jj;
		104
		105	i=start;j=0;k=0;
		106	while(i<jj) {
		107	if(V[I[i]+h]<x) {
		108	i++;
		109	} else if(V[I[i]+h]==x) {
		110	tmp=I[i];I[i]=I[jj+j];I[jj+j]=tmp;
		111	j++;
		112	} else {
		113	tmp=I[i];I[i]=I[kk+k];I[kk+k]=tmp;
		114	k++;
		115	};
		116	};
		117
		118	while(jj+j<kk) {
		119	if(V[I[jj+j]+h]==x) {
		120	j++;
		121	} else {
		122	tmp=I[jj+j];I[jj+j]=I[kk+k];I[kk+k]=tmp;
		123	k++;
		124	};
		125	};
		126
		127	if(jj>start) split(I,V,start,jj-start,h);
		128
		129	for(i=0;i<kk-jj;i++) V[I[jj+i]]=kk-1;
		130	if(jj==kk-1) I[jj]=-1;
		131
		132	if(start+len>kk) split(I,V,kk,start+len-kk,h);
		133	}
		134
		135	static void qsufsort(off_t I,off_t V,u_char *old,off_t oldsize)
		136	{
		137	off_t buckets[256];
		138	off_t i,h,len;
		139
		140	for(i=0;i<256;i++) buckets[i]=0;
		141	for(i=0;i<oldsize;i++) buckets[old[i]]++;
		142	for(i=1;i<256;i++) buckets[i]+=buckets[i-1];
		143	for(i=255;i>0;i--) buckets[i]=buckets[i-1];
		144	buckets[0]=0;
		145
		146	for(i=0;i<oldsize;i++) I[++buckets[old[i]]]=i;
		147	I[0]=oldsize;
		148	for(i=0;i<oldsize;i++) V[i]=buckets[old[i]];
		149	V[oldsize]=0;
		150	for(i=1;i<256;i++) if(buckets[i]==buckets[i-1]+1) I[buckets[i]]=-1;
		151	I[0]=-1;
		152
		153	for(h=1;I[0]!=-(oldsize+1);h+=h) {
		154	len=0;
		155	for(i=0;i<oldsize+1;) {
		156	if(I[i]<0) {
		157	len-=I[i];
		158	i-=I[i];
		159	} else {
		160	if(len) I[i-len]=-len;
		161	len=V[I[i]]+1-i;
		162	split(I,V,i,len,h);
		163	i+=len;
		164	len=0;
		165	};
		166	};
		167	if(len) I[i-len]=-len;
		168	};
		169
		170	for(i=0;i<oldsize+1;i++) I[V[i]]=i;
		171	}
		172
		173	static off_t matchlen(u_char old,off_t oldsize,u_char _new,off_t newsize)
		174	{
		175	off_t i;
		176
		177	for(i=0;(i<oldsize)&&(i<newsize);i++)
		178	if(old[i]!=_new[i]) break;
		179
		180	return i;
		181	}
		182
		183	static off_t search(off_t I,u_char old,off_t oldsize,
		184	u_char _new,off_t newsize,off_t st,off_t en,off_t pos)
		185	{
		186	off_t x,y;
		187
		188	if(en-st<2) {
		189	x=matchlen(old+I[st],oldsize-I[st],_new,newsize);
		190	y=matchlen(old+I[en],oldsize-I[en],_new,newsize);
		191
		192	if(x>y) {
		193	*pos=I[st];
		194	return x;
		195	} else {
		196	*pos=I[en];
		197	return y;
		198	}
		199	};
		200
		201	x=st+(en-st)/2;
		202	if(memcmp(old+I[x],_new,MIN(oldsize-I[x],newsize))<0) {
		203	return search(I,old,oldsize,_new,newsize,x,en,pos);
		204	} else {
		205	return search(I,old,oldsize,_new,newsize,st,x,pos);
		206	};
		207	}
		208
		209	static void offtout(off_t x,u_char *buf)
		210	{
		211	off_t y;
		212
		213	if(x<0) y=-x; else y=x;
		214
		215	buf[0]=y%256;y-=buf[0];
		216	y=y/256;buf[1]=y%256;y-=buf[1];
		217	y=y/256;buf[2]=y%256;y-=buf[2];
		218	y=y/256;buf[3]=y%256;y-=buf[3];
		219	y=y/256;buf[4]=y%256;y-=buf[4];
		220	y=y/256;buf[5]=y%256;y-=buf[5];
		221	y=y/256;buf[6]=y%256;y-=buf[6];
		222	y=y/256;buf[7]=y%256;
		223
		224	if(x<0) buf[7]\|=0x80;
		225	}
		226
		227	int main(int argc,char *argv[])
		228	{
		229	int fd;
		230	u_char old,_new;
		231	off_t oldsize,newsize;
		232	off_t I,V;
		233	off_t scan,pos,len;
		234	off_t lastscan,lastpos,lastoffset;
		235	off_t oldscore,scsc;
		236	off_t s,Sf,lenf,Sb,lenb;
		237	off_t overlap,Ss,lens;
		238	off_t i;
		239	off_t dblen,eblen;
		240	u_char db,eb;
		241	u_char buf[8];
		242	u_char header[32];
		243	FILE * pf;
		244	BZFILE * pfbz2;
		245	int bz2err;
		246
		247	if(argc!=4) errx(1,"usage: %s oldfile newfile patchfile\n",argv[0]);
		248
		249	/* Allocate oldsize+1 bytes instead of oldsize bytes to ensure
		250	that we never try to malloc(0) and get a NULL pointer */
		251	//org:
		252	//if(((fd=open(argv[1],O_RDONLY,0))<0) \|\|
		253	// ((oldsize=lseek(fd,0,SEEK_END))==-1) \|\|
		254	// ((old=malloc(oldsize+1))==NULL) \|\|
		255	// (lseek(fd,0,SEEK_SET)!=0) \|\|
		256	// (read(fd,old,oldsize)!=oldsize) \|\|
		257	// (close(fd)==-1)) err(1,"%s",argv[1]);
		258	//new:
		259	//Read in chunks, don't rely on read always returns full data!
		260	if(((fd=open(argv[1],O_RDONLY\|O_BINARY\|O_NOINHERIT,0))<0) \|\|
		261	((oldsize=lseek(fd,0,SEEK_END))==-1) \|\|
		262	((old=(u_char*)malloc(oldsize+1))==NULL) \|\|
		263	(lseek(fd,0,SEEK_SET)!=0))
		264	err(1,"%s",argv[1]);
		265	int r=oldsize;
		266	while (r>0 && (i=read(fd,old+oldsize-r,r))>0) r-=i;
		267	if (r>0 \|\| close(fd)==-1) err(1,"%s",argv[1]);
		268
		269
		270	if(((I=(off_t)malloc((oldsize+1)sizeof(off_t)))==NULL) \|\|
		271	((V=(off_t)malloc((oldsize+1)sizeof(off_t)))==NULL)) err(1,NULL);
		272
		273	qsufsort(I,V,old,oldsize);
		274
		275	free(V);
		276
		277	/* Allocate newsize+1 bytes instead of newsize bytes to ensure
		278	that we never try to malloc(0) and get a NULL pointer */
		279	//org:
		280	//if(((fd=open(argv[2],O_RDONLY,0))<0) \|\|
		281	// ((newsize=lseek(fd,0,SEEK_END))==-1) \|\|
		282	// ((_new=malloc(newsize+1))==NULL) \|\|
		283	// (lseek(fd,0,SEEK_SET)!=0) \|\|
		284	// (read(fd,_new,newsize)!=newsize) \|\|
		285	// (close(fd)==-1)) err(1,"%s",argv[2]);
		286	//new:
		287	//Read in chunks, don't rely on read always returns full data!
		288	if(((fd=open(argv[2],O_RDONLY\|O_BINARY\|O_NOINHERIT,0))<0) \|\|
		289	((newsize=lseek(fd,0,SEEK_END))==-1) \|\|
		290	((_new=(u_char*)malloc(newsize+1))==NULL) \|\|
		291	(lseek(fd,0,SEEK_SET)!=0))
		292	err(1,"%s",argv[2]);
		293
		294	r=newsize;
		295	while (r>0 && (i=read(fd,_new+newsize-r,r))>0) r-=i;
		296	if (r>0 \|\| close(fd)==-1) err(1,"%s",argv[1]);
		297
		298	if(((db=(u_char*)malloc(newsize+1))==NULL) \|\|
		299	((eb=(u_char*)malloc(newsize+1))==NULL)) err(1,NULL);
		300	dblen=0;
		301	eblen=0;
		302
		303	/* Create the patch file */
		304	//org:
		305	//if ((pf = fopen(argv[3], "w")) == NULL)
		306	//new:
		307	//if((fd=open(argv[3],O_CREAT\|O_TRUNC\|O_WRONLY\|O_BINARY\|O_NOINHERIT,0666))<0)
		308	if ((pf = fopen(argv[3], "wb")) == NULL)
		309	err(1,"%s",argv[3]);
		310
		311	/* Header is
		312
		313	8 8 length of bzip2ed ctrl block
		314	16 8 length of bzip2ed diff block
		315	24 8 length of new file */
		316	/* File is
		317
		318	32 ?? Bzip2ed ctrl block
		319	?? ?? Bzip2ed diff block
		320	?? ?? Bzip2ed extra block */
		321	memcpy(header,"BSDIFF40",8);
		322	offtout(0, header + 8);
		323	offtout(0, header + 16);
		324	offtout(newsize, header + 24);
		325	if (fwrite(header, 32, 1, pf) != 1)
		326	err(1, "fwrite(%s)", argv[3]);
		327
		328	/* Compute the differences, writing ctrl as we go */
		329	if ((pfbz2 = BZ2_bzWriteOpen(&bz2err, pf, 9, 0, 0)) == NULL)
		330	errx(1, "BZ2_bzWriteOpen, bz2err = %d", bz2err);
		331	scan=0;len=0;
		332	lastscan=0;lastpos=0;lastoffset=0;
		333	while(scan<newsize) {
		334	oldscore=0;
		335
		336	for(scsc=scan+=len;scan<newsize;scan++) {
		337	len=search(I,old,oldsize,_new+scan,newsize-scan,
		338	0,oldsize,&pos);
		339
		340	for(;scsc<scan+len;scsc++)
		341	if((scsc+lastoffset<oldsize) &&
		342	(old[scsc+lastoffset] == _new[scsc]))
		343	oldscore++;
		344
		345	if(((len==oldscore) && (len!=0)) \|\|
		346	(len>oldscore+8)) break;
		347
		348	if((scan+lastoffset<oldsize) &&
		349	(old[scan+lastoffset] == _new[scan]))
		350	oldscore--;
		351	};
		352
		353	if((len!=oldscore) \|\| (scan==newsize)) {
		354	s=0;Sf=0;lenf=0;
		355	for(i=0;(lastscan+i<scan)&&(lastpos+i<oldsize);) {
		356	if(old[lastpos+i]==_new[lastscan+i]) s++;
		357	i++;
		358	if(s2-i>Sf2-lenf) { Sf=s; lenf=i; };
		359	};
		360
		361	lenb=0;
		362	if(scan<newsize) {
		363	s=0;Sb=0;
		364	for(i=1;(scan>=lastscan+i)&&(pos>=i);i++) {
		365	if(old[pos-i]==_new[scan-i]) s++;
		366	if(s2-i>Sb2-lenb) { Sb=s; lenb=i; };
		367	};
		368	};
		369
		370	if(lastscan+lenf>scan-lenb) {
		371	overlap=(lastscan+lenf)-(scan-lenb);
		372	s=0;Ss=0;lens=0;
		373	for(i=0;i<overlap;i++) {
		374	if(_new[lastscan+lenf-overlap+i]==
		375	old[lastpos+lenf-overlap+i]) s++;
		376	if(_new[scan-lenb+i]==
		377	old[pos-lenb+i]) s--;
		378	if(s>Ss) { Ss=s; lens=i+1; };
		379	};
		380
		381	lenf+=lens-overlap;
		382	lenb-=lens;
		383	};
		384
		385	for(i=0;i<lenf;i++)
		386	db[dblen+i]=_new[lastscan+i]-old[lastpos+i];
		387	for(i=0;i<(scan-lenb)-(lastscan+lenf);i++)
		388	eb[eblen+i]=_new[lastscan+lenf+i];
		389
		390	dblen+=lenf;
		391	eblen+=(scan-lenb)-(lastscan+lenf);
		392
		393	offtout(lenf,buf);
		394	BZ2_bzWrite(&bz2err, pfbz2, buf, 8);
		395	if (bz2err != BZ_OK)
		396	errx(1, "BZ2_bzWrite, bz2err = %d", bz2err);
		397
		398	offtout((scan-lenb)-(lastscan+lenf),buf);
		399	BZ2_bzWrite(&bz2err, pfbz2, buf, 8);
		400	if (bz2err != BZ_OK)
		401	errx(1, "BZ2_bzWrite, bz2err = %d", bz2err);
		402
		403	offtout((pos-lenb)-(lastpos+lenf),buf);
		404	BZ2_bzWrite(&bz2err, pfbz2, buf, 8);
		405	if (bz2err != BZ_OK)
		406	errx(1, "BZ2_bzWrite, bz2err = %d", bz2err);
		407
		408	lastscan=scan-lenb;
		409	lastpos=pos-lenb;
		410	lastoffset=pos-scan;
		411	};
		412	};
		413	BZ2_bzWriteClose(&bz2err, pfbz2, 0, NULL, NULL);
		414	if (bz2err != BZ_OK)
		415	errx(1, "BZ2_bzWriteClose, bz2err = %d", bz2err);
		416
		417	/* Compute size of compressed ctrl data */
		418	if ((len = ftell(pf)) == -1)
		419	err(1, "ftello");
		420	offtout(len-32, header + 8);
		421
		422	/* Write compressed diff data */
		423	if ((pfbz2 = BZ2_bzWriteOpen(&bz2err, pf, 9, 0, 0)) == NULL)
		424	errx(1, "BZ2_bzWriteOpen, bz2err = %d", bz2err);
		425	BZ2_bzWrite(&bz2err, pfbz2, db, dblen);
		426	if (bz2err != BZ_OK)
		427	errx(1, "BZ2_bzWrite, bz2err = %d", bz2err);
		428	BZ2_bzWriteClose(&bz2err, pfbz2, 0, NULL, NULL);
		429	if (bz2err != BZ_OK)
		430	errx(1, "BZ2_bzWriteClose, bz2err = %d", bz2err);
		431
		432	/* Compute size of compressed diff data */
		433	if ((newsize = ftell(pf)) == -1)
		434	err(1, "ftello");
		435	offtout(newsize - len, header + 16);
		436
		437	/* Write compressed extra data */
		438	if ((pfbz2 = BZ2_bzWriteOpen(&bz2err, pf, 9, 0, 0)) == NULL)
		439	errx(1, "BZ2_bzWriteOpen, bz2err = %d", bz2err);
		440	BZ2_bzWrite(&bz2err, pfbz2, eb, eblen);
		441	if (bz2err != BZ_OK)
		442	errx(1, "BZ2_bzWrite, bz2err = %d", bz2err);
		443	BZ2_bzWriteClose(&bz2err, pfbz2, 0, NULL, NULL);
		444	if (bz2err != BZ_OK)
		445	errx(1, "BZ2_bzWriteClose, bz2err = %d", bz2err);
		446
		447	/* Seek to the beginning, write the header, and close the file */
		448	if (fseek(pf, 0, SEEK_SET))
		449	err(1, "fseeko");
		450	if (fwrite(header, 32, 1, pf) != 1)
		451	err(1, "fwrite(%s)", argv[3]);
		452	if (fclose(pf))
		453	err(1, "fclose");
		454
		455	/* Free the memory we used */
		456	free(db);
		457	free(eb);
		458	free(I);
		459	free(old);
		460	free(_new);
		461
		462	return 0;
		463	}

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(root)//vaca_plus/utils/source/bsdiff-4.3/win32/bsdiff.cpp – Rev 23