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/*
* Copyright (c) 2005 Michael Schroeder (mls@suse.de)
*
* This program is licensed under the BSD license, read LICENSE.BSD
* for further information
*/
#define _LARGEFILE64_SOURCE
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdint.h>
#include <zlib.h>
#include <bzlib.h>
#include <lzma.h>
#include "rpmoffs.h"
#include "delta.h"
#include "util.h"
#include "md5.h"
#include "cfile.h"
double targetsize;
double writtensize;
unsigned int readiso(FILE *fp, struct rpmpay *pay, int payn, unsigned char **isop)
{
off64_t size;
off64_t skipsum;
off64_t last;
int i;
unsigned char *iso;
unsigned int l, p, lastl;
char *lastn;
last = 0;
lastl = 0;
skipsum = 0;
lastn = "<start>";
for (i = 0; i < payn; i++)
{
if (pay[i].o == last)
{
if (pay[i].l != lastl)
{
fprintf(stderr, "files at same pos with different sizes\n");
exit(1);
}
continue;
}
if (last + lastl > pay[i].o)
{
fprintf(stderr, "files overlap %s %s %lld %d %lld\n", lastn, pay[i].name, (long long int)last, lastl, (long long int)pay[i].o);
exit(1);
}
last = pay[i].o;
lastl = pay[i].l;
lastn = pay[i].name;
skipsum += pay[i].l;
}
if (fseeko64(fp, (off64_t)0, SEEK_END) != 0)
{
perror("fseeko64");
exit(1);
}
size = ftello64(fp);
if (size < skipsum)
{
fprintf(stderr, "size < skipsum\n");
exit(1);
}
if (fseeko64(fp, (off64_t)0, SEEK_SET) != 0)
{
perror("fseeko64");
exit(1);
}
if (size - skipsum >= 0x80000000)
{
fprintf(stderr, "remaining size too big: %lld\n", (long long int)(size - skipsum));
exit(1);
}
l = size - skipsum;
if ((iso = malloc(l)) == 0)
{
fprintf(stderr, "out of mem for iso (%d bytes)", l);
exit(1);
}
last = 0;
lastl = 0;
p = 0;
pay[payn].o = size;
for (i = 0; i <= payn; i++)
{
if (pay[i].o == last)
continue;
if (fread(iso + p, pay[i].o - (last + lastl), 1, fp) != 1)
{
fprintf(stderr, "read error\n");
exit(1);
}
pay[i].x = p;
pay[i].lx = pay[i].o - (last + lastl);
p += pay[i].o - (last + lastl);
last = pay[i].o;
lastl = pay[i].l;
if (fseeko64(fp, pay[i].o + pay[i].l, SEEK_SET))
{
perror("fseeko64");
exit(1);
}
}
if (p != l)
{
fprintf(stderr, "internal error %d %d\n", p, l);
exit(1);
}
*isop = iso;
return l;
}
void
recode_instr(struct instr *instr, int instrlen, unsigned int **b1p, int *nb1p, unsigned int **b2p, int *nb2p, struct rpmpay *pay, int payn)
{
unsigned int *b1;
int nb1;
unsigned int *b2;
int nb2;
int i, j;
int lastoff;
unsigned int x1, x2, x3, x4;
unsigned int left;
int payp;
b1 = b2 = 0;
nb1 = nb2 = 0;
j = 0;
lastoff = 0;
left = pay && payn ? pay[0].lx : 0;
payp = 0;
for (i = 0; i < instrlen; i++)
{
x1 = instr[i].copyout;
x2 = instr[i].copyin;
x3 = instr[i].copyoutoff;
x4 = instr[i].copyinoff;
retry:
if (!x1)
{
if (!x2)
continue;
}
if (x1)
{
if ((nb2 & 15) == 0)
b2 = xrealloc2(b2, nb2 + 16, 2 * sizeof(unsigned int));
if (lastoff <= x3)
b2[2 * nb2] = x3 - lastoff;
else
b2[2 * nb2] = (lastoff - x3) | 0x80000000;
if (left && x1 >= left)
{
b2[2 * nb2 + 1] = left;
nb2++;
j++;
x3 = lastoff = x3 + left;
x1 -= left;
if ((nb1 & 15) == 0)
b1 = xrealloc2(b1, nb1 + 16, 3 * sizeof(unsigned int));
b1[3 * nb1] = j;
b1[3 * nb1 + 1] = 0xffffffff;
b1[3 * nb1 + 2] = payp;
nb1++;
j = 0;
left = 0;
while (payp < payn && pay[++payp].x == 0)
;
if (payp < payn)
left = pay[payp].lx;
goto retry;
}
else
{
b2[2 * nb2 + 1] = x1;
nb2++;
j++;
x3 = lastoff = x3 + x1;
if (left)
left -= x1;
}
}
if (x2)
{
if (left && x2 >= left)
{
if ((nb1 & 15) == 0)
b1 = xrealloc2(b1, nb1 + 16, 3 * sizeof(unsigned int));
b1[3 * nb1] = j;
b1[3 * nb1 + 1] = left;
b1[3 * nb1 + 2] = x4;
nb1++;
j = 0;
x2 -= left;
x4 += left;
if ((nb1 & 15) == 0)
b1 = xrealloc2(b1, nb1 + 16, 3 * sizeof(unsigned int));
b1[3 * nb1] = 0;
b1[3 * nb1 + 1] = 0xffffffff;
b1[3 * nb1 + 2] = payp;
nb1++;
left = 0;
while (payp < payn && pay[++payp].x == 0)
;
if (payp < payn)
left = pay[payp].lx;
x1 = 0;
goto retry;
}
if ((nb1 & 15) == 0)
b1 = xrealloc2(b1, nb1 + 16, 3 * sizeof(unsigned int));
b1[3 * nb1] = j;
b1[3 * nb1 + 1] = x2;
b1[3 * nb1 + 2] = x4;
nb1++;
j = 0;
if (left)
left -= x2;
}
}
if (left || payp != payn)
{
fprintf(stderr, "oops, left = %d %d %d\n", left, payp, payn);
exit(1);
}
if (j)
{
if ((nb1 & 15) == 0)
b1 = xrealloc2(b1, nb1 + 16, 3 * sizeof(unsigned int));
b1[3 * nb1] = j;
b1[3 * nb1 + 1] = 0;
b1[3 * nb1 + 2] = 0;
nb1++;
}
*b1p = b1;
*nb1p = nb1;
*b2p = b2;
*nb2p = nb2;
}
void
bzput4(struct cfile *fp, unsigned int d)
{
unsigned char dd[4];
dd[0] = d >> 24;
dd[1] = d >> 16;
dd[2] = d >> 8;
dd[3] = d;
if (fp->write(fp, dd, 4) != 4)
{
perror("bzwrite");
exit(1);
}
}
void
put4(FILE *fp, unsigned int d)
{
unsigned char dd[4];
dd[0] = d >> 24;
dd[1] = d >> 16;
dd[2] = d >> 8;
dd[3] = d;
if (fwrite(dd, 4, 1, fp) != 1)
{
perror("fwrite");
exit(1);
}
}
void diffit(struct cfile *fpout, FILE *fpold, FILE *fpnew, unsigned char *old, unsigned int oldl, unsigned char *new, int newl, struct rpmpay *newpays, int newpayn, struct rpmpay *oldpays, int oldpayn, MD5_CTX *ctx);
unsigned int payrawread(FILE *fp, off64_t off, unsigned int len, unsigned char **pp)
{
int l, r;
struct cfile *cfile;
if (fseeko64(fp, off, SEEK_SET) != 0)
{
perror("fseeko");
exit(1);
}
cfile = cfile_open(CFILE_OPEN_RD, CFILE_IO_FILE, fp, CFILE_COMP_UN, len, 0, 0);
if (!cfile)
{
fprintf(stderr, "cfile open failed\n");
exit(1);
}
l = cfile_copy(cfile, cfile_open(CFILE_OPEN_WR, CFILE_IO_ALLOC, pp, CFILE_COMP_UN, CFILE_LEN_UNLIMITED, 0, 0), CFILE_COPY_CLOSE_OUT);
if (l == -1)
{
fprintf(stderr, "cfile_copy failed\n");
exit(1);
}
r = cfile->close(cfile);
if (r)
{
fprintf(stderr, "cfile not used up (%d bytes left)\n", r);
exit(1);
}
return l;
}
unsigned int payread(FILE *fp, off64_t off, unsigned int len, unsigned char **pp, MD5_CTX *ctx, unsigned char *namebuf)
{
int l, r;
struct cfile *cfile;
if (fseeko64(fp, off, SEEK_SET) != 0)
{
perror("fseeko");
exit(1);
}
cfile = cfile_open(CFILE_OPEN_RD, CFILE_IO_FILE, fp, CFILE_COMP_XX, len, ctx ? (cfile_ctxup)rpmMD5Update : 0, ctx);
if (!cfile)
{
fprintf(stderr, "cfile open failed\n");
exit(1);
}
if (namebuf)
{
cfile_detect_rsync(cfile);
namebuf[0] = cfile->comp;
}
l = cfile_copy(cfile, cfile_open(CFILE_OPEN_WR, CFILE_IO_ALLOC, pp, CFILE_COMP_UN, CFILE_LEN_UNLIMITED, 0, 0), CFILE_COPY_CLOSE_OUT);
if (l == -1)
{
fprintf(stderr, "cfile_copy failed\n");
exit(1);
}
r = cfile->close(cfile);
if (r)
{
fprintf(stderr, "cfile not used up (%d bytes left)\n", r);
exit(1);
}
return l;
}
void
processrpm(struct cfile *fpout, FILE *fpold, FILE *fpnew, struct rpmpay *pay, struct rpmpay *oldpays, int oldpayn, MD5_CTX *ctx)
{
struct rpmpay *oldpay;
int i, n, payrawcmp;
unsigned int l, newl, oldl;
unsigned char *new, *old;
unsigned char namebuf[258];
oldpay = 0;
for (i = 0; i < oldpayn; i++)
if (!strcmp(oldpays[i].name, pay->name))
{
oldpay = oldpays + i;
break;
}
l = strlen(pay->name);
if (l > 255)
l = 255;
namebuf[0] = 255;
namebuf[1] = l;
memcpy(namebuf + 2, pay->name, l);
namebuf[l + 2] = 0;
targetsize += pay->l;
if (!oldpay)
{
printf("%s: not found in old iso...", pay->name);
if (fpout->write(fpout, namebuf, l + 2) != l + 2)
{
perror("namebuf write");
exit(1);
}
bzput4(fpout, pay->l);
if (fseeko64(fpnew, pay->o, SEEK_SET) != 0)
{
perror("fseeko");
exit(1);
}
if (cfile_copy(cfile_open(CFILE_OPEN_RD, CFILE_IO_FILE, fpnew, CFILE_COMP_UN, pay->l, (cfile_ctxup)rpmMD5Update, ctx), fpout, CFILE_COPY_CLOSE_IN) != 0)
{
fprintf(stderr, "cfile_copy failed\n");
exit(1);
}
}
else
{
n = 0;
for (i = 0; i < oldpayn; i++)
if (i == 0 || oldpays[i].x != 0)
{
if (oldpays[i].o == oldpay->o)
break;
else
n++;
}
if (i == oldpayn)
{
fprintf(stderr, "internal error\n");
exit(1);
}
if (oldpay->l != oldpays[i].l)
{
fprintf(stderr, "internal error, length mismatch %d %d\n", oldpay->l, oldpays[i].l);
exit(1);
}
/* compare the raw payloads */
newl = payrawread(fpnew, pay->o, pay->l, &new);
oldl = payrawread(fpold, oldpay->o, oldpay->l, &old);
if (newl == oldl && pay->l == oldpay->l)
{
payrawcmp = memcmp(new, old, newl);
}
else
{
payrawcmp = 1;
}
free(old);
old = 0;
oldl = 0;
free(new);
new = 0;
newl = 0;
/* payread will fix namebuf[0] */
newl = payread(fpnew, pay->o, pay->l, &new, ctx, namebuf);
if (!payrawcmp)
{
printf("%s: unchanged...", namebuf + 2);
namebuf[0] = 254;
}
else
{
oldl = payread(fpold, oldpay->o, oldpay->l, &old, 0, 0);
int comp = cfile_setlevel(namebuf[0], pay->level);
printf("%s (%s): creating delta...", namebuf + 2, cfile_comp2str(comp));
namebuf[0] = CFILE_COMPALGO(comp) | (CFILE_COMPLEVEL(comp) << 4); /* argh! */
}
fflush(stdout);
if (fpout->write(fpout, namebuf, l + 2) != l + 2)
{
perror("namebuf write");
exit(1);
}
bzput4(fpout, n); /* offset id */
if (namebuf[0] != 254)
diffit(fpout, 0, 0, old, oldl, new, newl, 0, 0, 0, 0, 0);
old = 0;
oldl = 0;
free(new);
new = 0;
newl = 0;
}
writtensize += fpout->bytes;
fpout->bytes = 0;
printf("%4.1f%%\n", writtensize * 100 / targetsize);
}
/* frees old! */
void diffit(struct cfile *fpout, FILE *fpold, FILE *fpnew, unsigned char *old, unsigned int oldl, unsigned char *new, int newl, struct rpmpay *newpays, int newpayn, struct rpmpay *oldpays, int oldpayn, MD5_CTX *ctx)
{
unsigned int *b1;
int nb1;
unsigned int *b2;
int nb2;
struct instr *instr = 0;
int instrlen = 0;
unsigned char *addblk = 0;
unsigned int addblklen = 0;
int i, j, b2i;
unsigned int off;
mkdiff(DELTAMODE_HASH, old, oldl, new, newl, &instr, &instrlen, 0, 0, &addblk, &addblklen, 0, 0);
free(old);
old = 0;
recode_instr(instr, instrlen, &b1, &nb1, &b2, &nb2, newpays, newpayn);
free(instr);
instr = 0;
instrlen = 0;
bzput4(fpout, oldl);
bzput4(fpout, newl);
bzput4(fpout, nb1);
bzput4(fpout, nb2);
for (i = 0; i < nb1; i++)
bzput4(fpout, b1[3 * i]);
for (i = 0; i < nb1; i++)
bzput4(fpout, b1[3 * i + 1]);
for (i = 0; i < nb2; i++)
bzput4(fpout, b2[2 * i]);
for (i = 0; i < nb2; i++)
bzput4(fpout, b2[2 * i + 1]);
/* write add section */
bzput4(fpout, addblklen);
if (addblklen && fpout->write(fpout, addblk, addblklen) != addblklen)
{
perror("bzwrite");
exit(1);
}
if (addblk)
free(addblk);
/* write data section */
b2i = 0;
off = 0;
for (i = 0; i < nb1; i++)
{
if (ctx)
{
for (j = 0; j < b1[3 * i]; j++, b2i++)
{
if (b2[2 * b2i + 1])
rpmMD5Update(ctx, new + off, b2[2 * b2i + 1]);
off += b2[2 * b2i + 1];
}
}
if (b1[3 * i + 1] == 0xffffffff)
{
processrpm(fpout, fpold, fpnew, newpays + b1[3 * i + 2], oldpays, oldpayn, ctx);
}
else if (b1[3 * i + 1])
{
if (ctx)
{
if (off != b1[3 * i + 2])
{
fprintf(stderr, "internal error: off mismatch %d %d\n", off, b1[3 * i + 2]);
exit(1);
}
rpmMD5Update(ctx, new + off, b1[3 * i + 1]);
off += b1[3 * i + 1];
}
if (fpout->write(fpout, new + b1[3 * i + 2], b1[3 * i + 1]) != b1[3 * i + 1])
{
perror("bzwrite");
exit(1);
}
}
}
free(b1);
free(b2);
}
int
main(int argc, char **argv)
{
FILE *fpold, *fpnew, *fpout;
unsigned int oldisolen;
unsigned int newisolen;
unsigned char *oldiso;
unsigned char *newiso;
struct rpmpay *oldpays = 0;
int oldpayn = 0;
struct rpmpay *newpays = 0;
int newpayn = 0;
int i, n;
struct cfile *bf;
MD5_CTX targetmd5;
unsigned char targetmd5res[16];
if (argc != 4)
{
fprintf(stderr, "usage: makedeltaiso <oldiso> <newiso> <deltaiso>\n");
exit(1);
}
if ((fpold = fopen64(argv[1], "r")) == 0)
{
perror(argv[1]);
exit(1);
}
if ((fpnew = fopen64(argv[2], "r")) == 0)
{
perror(argv[2]);
exit(1);
}
oldpayn = rpmoffs(fpold, argv[1], &oldpays);
printf("%s: %d rpms\n", argv[1], oldpayn);
newpayn = rpmoffs(fpnew, argv[2], &newpays);
printf("%s: %d rpms\n", argv[2], newpayn);
if ((fpout = fopen64(argv[3], "w")) == 0)
{
perror(argv[3]);
exit(1);
}
printf("reading old iso (omitting payloads)\n");
oldisolen = readiso(fpold, oldpays, oldpayn, &oldiso);
printf("size without payloads is %d bytes\n", oldisolen);
printf("reading new iso (omitting payloads)\n");
newisolen = readiso(fpnew, newpays, newpayn, &newiso);
printf("size without payloads is %d bytes\n", newisolen);
targetsize = newisolen;
putc('D', fpout);
putc('I', fpout);
putc('S', fpout);
putc('O', fpout);
put4(fpout, 2);
if ((bf = cfile_open(CFILE_OPEN_WR, CFILE_IO_FILE, fpout, CFILE_COMP_BZ, CFILE_LEN_UNLIMITED, 0, 0)) == 0)
{
fprintf(stderr, "cfile wopen failed\n");
exit(1);
}
/* write old map */
n = 0;
for (i = 0; i < oldpayn; i++)
if (i == 0 || oldpays[i].x)
n++;
bzput4(bf, n);
for (i = 0; i < oldpayn; i++)
if (i == 0 || oldpays[i].x)
{
bzput4(bf, oldpays[i].lx);
bzput4(bf, oldpays[i].l);
}
bzput4(bf, oldpays[i].lx);
printf("creating iso diff\n");
rpmMD5Init(&targetmd5);
diffit(bf, fpold, fpnew, oldiso, oldisolen, newiso, newisolen, newpays, newpayn, oldpays, oldpayn, &targetmd5);
rpmMD5Final(targetmd5res, &targetmd5);
oldiso = 0;
oldisolen = 0;
free(newiso);
newiso = 0;
newisolen = 0;
writtensize += bf->bytes;
bf->bytes = 0;
printf("iso diff done, final compression: %4.1f%%\n", writtensize * 100 / targetsize);
if (bf->write(bf, targetmd5res, 16) != 16)
{
perror("md5sum write");
exit(1);
}
if (bf->close(bf) == -1)
{
perror("cfile close");
exit(1);
}
if (fclose(fpout))
{
perror("fclose");
exit(1);
}
printf("iso md5sum is: ");
for (i = 0; i < 16; i++)
printf("%02x", targetmd5res[i]);
printf("\n");
for (i = 0; i < oldpayn; i++)
free(oldpays[i].name);
free(oldpays);
for (i = 0; i < newpayn; i++)
free(newpays[i].name);
free(newpays);
exit(0);
}
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