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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 1998-2003 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include "check.h"
#ifndef DEBUG
#define MSG_DISORDER gettext("sort: disorder: ")
#define MSG_NONUNIQUE gettext("sort: non-unique: ")
#else /* DEBUG */
#define MSG_DISORDER gettext("sort: disorder (%llu): ")
#define MSG_NONUNIQUE gettext("sort: non-unique (%llu): ")
#endif /* DEBUG */
#define CHECK_FAILURE_DISORDER 0x1
#define CHECK_FAILURE_NONUNIQUE 0x2
#define CHECK_WIDE 0x4
static void
fail_check(line_rec_t *L, int flags, u_longlong_t lineno)
{
char *line;
ssize_t length;
if (flags & CHECK_WIDE) {
if ((length = (ssize_t)wcstombs(NULL, L->l_data.wp, 0)) < 0)
die(EMSG_ILLEGAL_CHAR);
/*
* +1 for null character
*/
line = alloca(length + 1);
(void) wcstombs(line, L->l_data.wp, L->l_data_length);
line[length] = '\0';
} else {
line = L->l_data.sp;
length = L->l_data_length;
}
if (flags & CHECK_FAILURE_DISORDER) {
(void) fprintf(stderr, MSG_DISORDER, lineno);
(void) write(fileno(stderr), line, length);
(void) fprintf(stderr, "\n");
return;
}
(void) fprintf(stderr, MSG_NONUNIQUE);
(void) write(fileno(stderr), line, length);
(void) fprintf(stderr, "\n");
}
static void
swap_coll_bufs(line_rec_t *A, line_rec_t *B)
{
char *coll_buffer = B->l_collate.sp;
ssize_t coll_bufsize = B->l_collate_bufsize;
safe_free(B->l_raw_collate.sp);
copy_line_rec(A, B);
A->l_collate.sp = coll_buffer;
A->l_collate_bufsize = coll_bufsize;
A->l_raw_collate.sp = NULL;
}
/*
* check_if_sorted() interacts with a stream in a slightly different way than a
* simple sort or a merge operation: the check involves looking at two adjacent
* lines of the file and verifying that they are collated according to the key
* specifiers given. For files accessed via mmap(), this is simply done as the
* entirety of the file is present in the address space. For files accessed via
* stdio, regardless of locale, we must be able to guarantee that two lines are
* present in memory at once. The basic buffer code for stdio does not make
* such a guarantee, so we use stream_swap_buffer() to alternate between two
* input buffers.
*/
void
check_if_sorted(sort_t *S)
{
size_t input_mem;
int numerator, denominator;
char *data_buffer = NULL;
size_t data_bufsize = 0;
line_rec_t last_line;
u_longlong_t lineno = 0;
int r;
int swap_required;
flag_t coll_flags;
stream_t *cur_streamp = S->m_input_streams;
ssize_t (*conversion_fcn)(field_t *, line_rec_t *, flag_t, vchar_t) =
field_convert;
int (*collation_fcn)(line_rec_t *, line_rec_t *, ssize_t, flag_t) =
collated;
set_memory_ratio(S, &numerator, &denominator);
if (stream_open_for_read(S, cur_streamp) > 1)
die(EMSG_CHECK);
if (SOP_EOS(cur_streamp))
exit(E_SUCCESS);
(void) memset(&last_line, 0, sizeof (line_rec_t));
/*
* We need to swap data buffers for the stream with each fetch, except
* on STREAM_MMAP (which are implicitly STREAM_SUSTAIN).
*/
swap_required = !(cur_streamp->s_status & STREAM_MMAP);
if (swap_required) {
stream_set(cur_streamp, STREAM_INSTANT);
/*
* We use one half of the available memory for input, half for
* each buffer. (The other half is left unreserved, in case
* conversions to collatable form require it.)
*/
input_mem = numerator * S->m_memory_available / denominator / 4;
stream_set_size(cur_streamp, input_mem);
stream_swap_buffer(cur_streamp, &data_buffer, &data_bufsize);
stream_set_size(cur_streamp, input_mem);
if (cur_streamp->s_status & STREAM_WIDE) {
conversion_fcn = field_convert_wide;
collation_fcn = collated_wide;
}
}
if (SOP_PRIME(cur_streamp) > 1)
die(EMSG_CHECK);
if (S->m_field_options & FIELD_REVERSE_COMPARISONS)
coll_flags = COLL_REVERSE;
else
coll_flags = 0;
if (S->m_unique_lines)
coll_flags |= COLL_UNIQUE;
cur_streamp->s_current.l_collate_bufsize = INITIAL_COLLATION_SIZE
* cur_streamp->s_element_size;
cur_streamp->s_current.l_collate.sp = safe_realloc(NULL,
cur_streamp->s_current.l_collate_bufsize);
cur_streamp->s_current.l_raw_collate.sp = NULL;
last_line.l_collate_bufsize = INITIAL_COLLATION_SIZE *
cur_streamp->s_element_size;
last_line.l_collate.sp = safe_realloc(NULL,
last_line.l_collate_bufsize);
last_line.l_raw_collate.sp = NULL;
(void) conversion_fcn(S->m_fields_head, &cur_streamp->s_current,
FCV_REALLOC, S->m_field_separator);
swap_coll_bufs(&cur_streamp->s_current, &last_line);
if (swap_required)
stream_swap_buffer(cur_streamp, &data_buffer, &data_bufsize);
while (!SOP_EOS(cur_streamp)) {
(void) SOP_FETCH(cur_streamp);
lineno++;
(void) conversion_fcn(S->m_fields_head, &cur_streamp->s_current,
FCV_REALLOC, S->m_field_separator);
r = collation_fcn(&last_line, &cur_streamp->s_current, 0,
coll_flags);
if (r < 0 || (r == 0 && S->m_unique_lines == 0)) {
swap_coll_bufs(&cur_streamp->s_current, &last_line);
if (swap_required)
stream_swap_buffer(cur_streamp, &data_buffer,
&data_bufsize);
continue;
}
if (r > 0) {
#ifndef XPG4
fail_check(&cur_streamp->s_current,
CHECK_FAILURE_DISORDER |
(S->m_single_byte_locale ? 0 : CHECK_WIDE),
lineno);
#endif /* XPG4 */
exit(E_FAILED_CHECK);
}
if (r == 0 && S->m_unique_lines != 0) {
#ifndef XPG4
fail_check(&cur_streamp->s_current,
CHECK_FAILURE_NONUNIQUE |
(S->m_single_byte_locale ? 0 : CHECK_WIDE),
lineno);
#endif /* XPG4 */
exit(E_FAILED_CHECK);
}
}
exit(E_SUCCESS);
/*NOTREACHED*/
}
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