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diff: don't use FILE_and_pos_t where it's not needed. -31 bytes

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>>From 3ead41fc3cbdd904e478ff7a710f5960c8ed4288 Mon Sep 17 00:00:00 2001
From: Matheus Izvekov <mizvekov@gmail.com>
Date: Mon, 18 Jan 2010 22:14:46 -0200
Subject: [PATCH] diff: don't use FILE_and_pos_t where it's not needed. -31 bytes

Signed-off-by: Matheus Izvekov <mizvekov@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Matheus Izvekov 2010-01-18 22:21:40 -02:00 committed by Denys Vlasenko
parent 4de4cb6b9b
commit 404f14407c
1 changed files with 11 additions and 16 deletions
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27
editors/diff.c
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@ -432,7 +432,7 @@ static NOINLINE int *create_J(FILE_and_pos_t ft[2], int nlen[2], off_t *ix[2])
token_t tok;
size_t sz = 100;
nfile[i] = xmalloc((sz + 3) * sizeof(nfile[i][0]));
seek_ft(&ft[i], 0);
fseeko(ft[i].ft_fp, 0, SEEK_SET); /* ft gets here without the correct position */
nlen[i] = 0;
/* We could zalloc nfile, but then zalloc starts showing in gprof at ~1% */
@ -571,10 +571,11 @@ struct context_vec {
int d; /* end line in new file */
};
static bool diff(FILE_and_pos_t ft[2], char *file[2])
static bool diff(FILE* fp[2], char *file[2])
{
int nlen[2];
off_t *ix[2];
FILE_and_pos_t ft[2] = { { fp[0] }, { fp[1] } };
int *J = create_J(ft, nlen, ix);
bool anychange = false;
@ -670,7 +671,7 @@ static bool diff(FILE_and_pos_t ft[2], char *file[2])
static int diffreg(char *file[2])
{
FILE_and_pos_t ft[2];
FILE *fp[2];
bool binary = false, differ = false;
int status = STATUS_SAME;
@ -681,23 +682,19 @@ static int diffreg(char *file[2])
/* Our diff implementation is using seek.
* When we meet non-seekable file, we must make a temp copy.
*/
ft[i].ft_pos = 0;
if (lseek(fd, 0, SEEK_SET) == -1 && errno == ESPIPE) {
char name[] = "/tmp/difXXXXXX";
int fd_tmp = mkstemp(name);
if (fd_tmp < 0)
bb_perror_msg_and_die("mkstemp");
unlink(name);
ft[i].ft_pos = bb_copyfd_eof(fd, fd_tmp);
/* error message is printed by bb_copyfd_eof */
if (ft[i].ft_pos < 0)
if (bb_copyfd_eof(fd, fd_tmp) < 0)
xfunc_die();
fstat(fd, &stb[i]);
if (fd) /* Prevents closing of stdin */
close(fd);
fd = fd_tmp;
}
ft[i].ft_fp = fdopen(fd, "r");
fp[i] = fdopen(fd, "r");
}
while (1) {
@ -705,10 +702,8 @@ static int diffreg(char *file[2])
char *const buf0 = bb_common_bufsiz1;
char *const buf1 = buf0 + sz;
int i, j;
i = fread(buf0, 1, sz, ft[0].ft_fp);
ft[0].ft_pos += i;
j = fread(buf1, 1, sz, ft[1].ft_fp);
ft[1].ft_pos += j;
i = fread(buf0, 1, sz, fp[0]);
j = fread(buf1, 1, sz, fp[1]);
if (i != j) {
differ = true;
i = MIN(i, j);
@ -725,14 +720,14 @@ static int diffreg(char *file[2])
if (differ) {
if (binary && !(option_mask32 & FLAG(a)))
status = STATUS_BINARY;
else if (diff(ft, file))
else if (diff(fp, file))
status = STATUS_DIFFER;
}
if (status != STATUS_SAME)
exit_status |= 1;
fclose_if_not_stdin(ft[0].ft_fp);
fclose_if_not_stdin(ft[1].ft_fp);
fclose_if_not_stdin(fp[0]);
fclose_if_not_stdin(fp[1]);
return status;
}