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/* $OpenBSD: append.c,v 1.10 2009/10/27 23:59:43 deraadt Exp $ */
/*-
* Copyright (c) 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Peter McIlroy.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "sort.h"
#include <stdlib.h>
#include <string.h>
#define OUTPUT { \
if ((n = cpos - ppos) > 1) { \
for (; ppos < cpos; ++ppos) \
*ppos -= odepth; \
ppos -= n; \
radixsort((const u_char **)ppos, n, wts1, REC_D); \
for (; ppos < cpos; ppos++) { \
prec = (RECHEADER *) (*ppos - sizeof(TRECHEADER));\
put(prec, fp); \
} \
} else \
put(prec, fp); \
}
/*
* copy sorted lines to output; check for uniqueness
*/
void
append(u_char **keylist, int nelem, int depth, FILE *fp,
void (*put)(RECHEADER *, FILE *), struct field *ftbl)
{
u_char *wts, *wts1;
int n, odepth;
u_char **cpos, **ppos, **lastkey;
u_char *cend, *pend, *start;
RECHEADER *crec, *prec;
if (*keylist == NULL)
return;
wts1 = wts = ftbl[0].weights;
if ((!UNIQUE) && SINGL_FLD) {
if (ftbl[0].flags & F && ftbl[0].flags & R)
wts1 = Rascii;
else if (ftbl[0].flags & F)
wts1 = ascii;
odepth = depth;
}
lastkey = keylist + nelem;
depth += sizeof(TRECHEADER);
if (SINGL_FLD && (UNIQUE || wts1 != wts)) {
ppos = keylist;
prec = (RECHEADER *) (*ppos - depth);
if (UNIQUE)
put(prec, fp);
for (cpos = &keylist[1]; cpos < lastkey; cpos++) {
crec = (RECHEADER *) (*cpos - depth);
if (crec->length == prec->length) {
/*
* Set pend and cend so that trailing NUL and
* record separator is ignored.
*/
pend = (u_char *)&prec->data + prec->length - 2;
cend = (u_char *)&crec->data + crec->length - 2;
for (start = *cpos; cend >= start; cend--) {
if (wts[*cend] != wts[*pend])
break;
pend--;
}
if (pend + 1 != *ppos) {
if (!UNIQUE)
OUTPUT
else
put(crec, fp);
ppos = cpos;
prec = crec;
}
} else {
if (!UNIQUE)
OUTPUT
else
put(crec, fp);
ppos = cpos;
prec = crec;
}
}
if (!UNIQUE)
OUTPUT
} else if (UNIQUE) {
ppos = keylist;
prec = (RECHEADER *) (*ppos - depth);
put(prec, fp);
for (cpos = &keylist[1]; cpos < lastkey; cpos++) {
crec = (RECHEADER *) (*cpos - depth);
if (crec->offset == prec->offset) {
/*
* Set pend and cend so that trailing NUL and
* record separator is ignored.
*/
pend = (u_char *)&prec->data + prec->offset - 2;
cend = (u_char *)&crec->data + crec->offset - 2;
for (start = *cpos; cend >= start; cend--) {
if (wts[*cend] != wts[*pend])
break;
pend--;
}
if (pend + 1 != *ppos) {
ppos = cpos;
prec = crec;
put(prec, fp);
}
} else {
ppos = cpos;
prec = crec;
put(prec, fp);
}
}
} else for (cpos = keylist; cpos < lastkey; cpos++) {
crec = (RECHEADER *) (*cpos - depth);
put(crec, fp);
}
}
/*
* output the already sorted eol bin.
*/
void
rd_append(int binno, union f_handle infl0, int nfiles, FILE *outfp,
u_char *buffer, u_char *bufend)
{
RECHEADER *rec;
rec = (RECHEADER *) buffer;
if (!getnext(binno, infl0, nfiles, (RECHEADER *) buffer, bufend, 0)) {
putline(rec, outfp);
while (getnext(binno, infl0, nfiles, (RECHEADER *) buffer,
bufend, 0) == 0) {
if (!UNIQUE)
putline(rec, outfp);
}
}
}
/*
* append plain text--used after sorting the biggest bin.
*/
void
concat(FILE *a, FILE *b)
{
int nread;
char buffer[4096];
rewind(b);
while ((nread = fread(buffer, 1, 4096, b)) > 0)
EWRITE(buffer, 1, nread, a);
}
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