void
c_regular(int fd1, const char *file1, off_t skip1, off_t len1,
int fd2, const char *file2, off_t skip2, off_t len2)
{
u_char ch, *p1, *p2, *m1, *m2, *e1, *e2;
off_t byte, length, line;
int dfound;
off_t pagemask, off1, off2;
size_t pagesize;
struct sigaction act, oact;
if (skip1 > len1)
eofmsg(file1);
len1 -= skip1;
if (skip2 > len2)
eofmsg(file2);
len2 -= skip2;
if (sflag && len1 != len2)
exit(DIFF_EXIT);
sigemptyset(&act.sa_mask);
act.sa_flags = SA_NODEFER;
act.sa_handler = segv_handler;
if (sigaction(SIGSEGV, &act, &oact))
err(ERR_EXIT, "sigaction()");
pagesize = getpagesize();
pagemask = (off_t)pagesize - 1;
off1 = ROUNDPAGE(skip1);
off2 = ROUNDPAGE(skip2);
length = MIN(len1, len2);
if ((m1 = remmap(NULL, fd1, off1)) == NULL) {
c_special(fd1, file1, skip1, fd2, file2, skip2);
return;
}
if ((m2 = remmap(NULL, fd2, off2)) == NULL) {
munmap(m1, MMAP_CHUNK);
c_special(fd1, file1, skip1, fd2, file2, skip2);
return;
}
dfound = 0;
e1 = m1 + MMAP_CHUNK;
e2 = m2 + MMAP_CHUNK;
p1 = m1 + (skip1 - off1);
p2 = m2 + (skip2 - off2);
for (byte = line = 1; length--; ++byte) {
if ((ch = *p1) != *p2) {
if (xflag) {
dfound = 1;
(void)printf("%08llx %02x %02x\n",
(long long)byte - 1, ch, *p2);
} else if (lflag) {
dfound = 1;
(void)printf("%6lld %3o %3o\n",
(long long)byte, ch, *p2);
} else
diffmsg(file1, file2, byte, line);
/* NOTREACHED */
}
if (ch == '\n')
++line;
if (++p1 == e1) {
off1 += MMAP_CHUNK;
if ((p1 = m1 = remmap(m1, fd1, off1)) == NULL) {
munmap(m2, MMAP_CHUNK);
err(ERR_EXIT, "remmap %s", file1);
}
e1 = m1 + MMAP_CHUNK;
}
if (++p2 == e2) {
off2 += MMAP_CHUNK;
if ((p2 = m2 = remmap(m2, fd2, off2)) == NULL) {
munmap(m1, MMAP_CHUNK);
err(ERR_EXIT, "remmap %s", file2);
}
e2 = m2 + MMAP_CHUNK;
}
}
munmap(m1, MMAP_CHUNK);
munmap(m2, MMAP_CHUNK);
if (sigaction(SIGSEGV, &oact, NULL))
err(ERR_EXIT, "sigaction()");
if (len1 != len2)
eofmsg (len1 > len2 ? file2 : file1);
if (dfound)
exit(DIFF_EXIT);
}
void
c_regular(int fd1, const char *file1, off_t skip1, off_t len1, int fd2,
const char *file2, off_t skip2, off_t len2)
{
u_char ch, *p1, *p2, *m1, *m2, *e1, *e2;
off_t byte, length, line;
int dfound;
off_t pagemask, off1, off2;
size_t pagesize;
if (skip1 > len1)
eofmsg(file1);
len1 -= skip1;
if (skip2 > len2)
eofmsg(file2);
len2 -= skip2;
if (sflag && len1 != len2)
exit(DIFF_EXIT);
pagesize = getpagesize();
pagemask = (off_t)pagesize - 1;
off1 = ROUNDPAGE(skip1);
off2 = ROUNDPAGE(skip2);
length = MIN(len1, len2);
if ((m1 = remmap(NULL, fd1, off1)) == NULL) {
c_special(fd1, file1, skip1, fd2, file2, skip2);
return;
}
if ((m2 = remmap(NULL, fd2, off2)) == NULL) {
munmap(m1, MMAP_CHUNK);
c_special(fd1, file1, skip1, fd2, file2, skip2);
return;
}
dfound = 0;
e1 = m1 + MMAP_CHUNK;
e2 = m2 + MMAP_CHUNK;
p1 = m1 + (skip1 - off1);
p2 = m2 + (skip2 - off2);
for (byte = line = 1; length--; ++byte) {
if ((ch = *p1) != *p2) {
if (xflag) {
dfound = 1;
printf("%08jx %02x %02x\n",
(intmax_t)byte - 1, ch, *p2);
} else if (lflag) {
dfound = 1;
printf("%6jd %3o %3o\n",
(intmax_t)byte, ch, *p2);
} else {
diffmsg(file1, file2, byte, line);
/* NOTREACHED */
}
}
if (ch == '\n')
++line;
if (++p1 == e1) {
off1 += MMAP_CHUNK;
if ((p1 = m1 = remmap(m1, fd1, off1)) == NULL) {
munmap(m2, MMAP_CHUNK);
err(ERR_EXIT, "remmap %s", file1);
}
e1 = m1 + MMAP_CHUNK;
}
if (++p2 == e2) {
off2 += MMAP_CHUNK;
if ((p2 = m2 = remmap(m2, fd2, off2)) == NULL) {
munmap(m1, MMAP_CHUNK);
err(ERR_EXIT, "remmap %s", file2);
}
e2 = m2 + MMAP_CHUNK;
}
}
munmap(m1, MMAP_CHUNK);
munmap(m2, MMAP_CHUNK);
if (len1 != len2)
eofmsg (len1 > len2 ? file2 : file1);
if (dfound)
exit(DIFF_EXIT);
}
c_regular(int fd1, char *file1, off_t skip1, off_t len1, int fd2, char *file2,
off_t skip2, off_t len2)
#endif
{
#ifndef __GNO__
u_char ch, *p1, *p2;
#else
u_char ch, p1, p2;
#endif
off_t byte, length, line;
int dfound;
off_t pagemask, off1, off2;
if (sflag && len1 != len2)
exit(1);
if (skip1 > len1)
eofmsg(file1);
len1 -= skip1;
if (skip2 > len2)
eofmsg(file2);
len2 -= skip2;
pagemask = (off_t)getpagesize() - 1;
off1 = ROUNDPAGE(skip1);
off2 = ROUNDPAGE(skip2);
length = MIN(len1, len2);
#ifndef __ORCAC__
if (length > SIZE_T_MAX)
return (c_special(fd1, file1, skip1, fd2, file2, skip2));
#else
if (length > SIZE_T_MAX) {
c_special(fd1, file1, skip1, fd2, file2, skip2);
return;
}
#endif
#ifndef __GNO__
if ((p1 = (u_char *)mmap(NULL,
(size_t)length, PROT_READ, MAP_SHARED, fd1, off1)) == (u_char *)MAP_FAILED)
err(ERR_EXIT, "%s", file1);
madvise(p1, length, MADV_SEQUENTIAL);
if ((p2 = (u_char *)mmap(NULL,
(size_t)length, PROT_READ, MAP_SHARED, fd2, off2)) == (u_char *)MAP_FAILED)
err(ERR_EXIT, "%s", file2);
madvise(p2, length, MADV_SEQUENTIAL);
dfound = 0;
p1 += skip1 - off1;
p2 += skip2 - off2;
for (byte = line = 1; length--; ++p1, ++p2, ++byte) {
if ((ch = *p1) != *p2)
if (lflag) {
dfound = 1;
(void)printf("%6qd %3o %3o\n", byte, ch, *p2);
} else
diffmsg(file1, file2, byte, line);
/* NOTREACHED */
if (ch == '\n')
++line;
}
if (len1 != len2)
eofmsg (len1 > len2 ? file2 : file1);
if (dfound)
exit(DIFF_EXIT);
#else
dfound = 0;
lseek(fd1, skip1, SEEK_SET);
lseek(fd2, skip2, SEEK_SET);
for (byte = line = 1; length--; ++byte) {
read(fd1, (void *) &p1, 1);
read(fd2, (void *) &p2, 1);
if (p1 != p2)
if (lflag) {
dfound = 1;
(void)printf("%6qd %3o %3o\n", byte, ch, p2);
} else
diffmsg(file1, file2, byte, line);
/* NOTREACHED */
if (p1 == '\n')
++line;
}
if (len1 != len2)
eofmsg (len1 > len2 ? file2 : file1);
if (dfound)
exit(DIFF_EXIT);
#endif
}
