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/* $OpenBSD: rcsutil.c,v 1.46 2017/08/29 16:47:33 otto Exp $ */
/*
* Copyright (c) 2005, 2006 Joris Vink <joris@openbsd.org>
* Copyright (c) 2006 Xavier Santolaria <xsa@openbsd.org>
* Copyright (c) 2006 Niall O'Higgins <niallo@openbsd.org>
* Copyright (c) 2006 Ray Lai <ray@openbsd.org>
* All rights reserved.
*
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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 <sys/queue.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "got_compat.h"
#include "buf.h"
#include "rcsutil.h"
/*
* Split the contents of a file into a list of lines.
*/
struct rcs_lines *
rcs_splitlines(u_char *data, size_t len)
{
u_char *c, *p;
struct rcs_lines *lines;
struct rcs_line *lp;
size_t i, tlen;
lines = calloc(1, sizeof(*lines));
if (lines == NULL)
return NULL;
TAILQ_INIT(&(lines->l_lines));
lp = calloc(1, sizeof(*lp));
if (lp == NULL) {
free(lines);
return NULL;
}
TAILQ_INSERT_TAIL(&(lines->l_lines), lp, l_list);
p = c = data;
for (i = 0; i < len; i++) {
if (*p == '\n' || (i == len - 1)) {
tlen = p - c + 1;
lp = malloc(sizeof(*lp));
if (lp == NULL) {
rcs_freelines(lines);
return NULL;
}
lp->l_line = c;
lp->l_len = tlen;
lp->l_lineno = ++(lines->l_nblines);
TAILQ_INSERT_TAIL(&(lines->l_lines), lp, l_list);
c = p + 1;
}
p++;
}
return (lines);
}
void
rcs_freelines(struct rcs_lines *lines)
{
struct rcs_line *lp;
while ((lp = TAILQ_FIRST(&(lines->l_lines))) != NULL) {
TAILQ_REMOVE(&(lines->l_lines), lp, l_list);
free(lp);
}
free(lines);
}
BUF *
rcs_patchfile(u_char *data, size_t dlen, u_char *patch, size_t plen,
int (*p)(struct rcs_lines *, struct rcs_lines *))
{
const struct got_error *err = NULL;
struct rcs_lines *dlines, *plines;
struct rcs_line *lp;
BUF *res;
size_t newlen;
dlines = rcs_splitlines(data, dlen);
plines = rcs_splitlines(patch, plen);
if (p(dlines, plines) < 0) {
rcs_freelines(dlines);
rcs_freelines(plines);
return (NULL);
}
err = buf_alloc(&res, 1024);
if (err)
return NULL;
TAILQ_FOREACH(lp, &dlines->l_lines, l_list) {
if (lp->l_line == NULL)
continue;
buf_append(&newlen, res, lp->l_line, lp->l_len);
}
rcs_freelines(dlines);
rcs_freelines(plines);
return (res);
}
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