コード例 #1
0
ファイル: regular.c プロジェクト: 2asoft/freebsd
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);
}
コード例 #2
0
ファイル: regular.c プロジェクト: AhmadTux/DragonFlyBSD
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);
}
コード例 #3
0
ファイル: regular.c プロジェクト: GnoConsortium/gno
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

}