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/* $OpenBSD: util.c,v 1.1 2006/04/26 02:55:13 joris Exp $ */
/*
* Copyright (c) 2004 Jean-Francois Brousseau <jfb@openbsd.org>
* Copyright (c) 2005, 2006 Joris Vink <joris@openbsd.org>
* Copyright (c) 2005, 2006 Xavier Santolaria <xsa@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 "includes.h"
#include "buf.h"
#include "util.h"
#include "xmalloc.h"
/*
* Split the contents of a file into a list of lines.
*/
struct rcs_lines *
rcs_splitlines(const char *fcont)
{
char *dcp;
struct rcs_lines *lines;
struct rcs_line *lp;
lines = xmalloc(sizeof(*lines));
TAILQ_INIT(&(lines->l_lines));
lines->l_nblines = 0;
lines->l_data = xstrdup(fcont);
lp = xmalloc(sizeof(*lp));
lp->l_line = NULL;
lp->l_lineno = 0;
TAILQ_INSERT_TAIL(&(lines->l_lines), lp, l_list);
for (dcp = lines->l_data; *dcp != '\0';) {
lp = xmalloc(sizeof(*lp));
lp->l_line = dcp;
lp->l_lineno = ++(lines->l_nblines);
TAILQ_INSERT_TAIL(&(lines->l_lines), lp, l_list);
dcp = strchr(dcp, '\n');
if (dcp == NULL)
break;
*(dcp++) = '\0';
}
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);
xfree(lp);
}
xfree(lines->l_data);
xfree(lines);
}
BUF *
rcs_patchfile(const char *data, const char *patch,
int (*p)(struct rcs_lines *, struct rcs_lines *))
{
struct rcs_lines *dlines, *plines;
struct rcs_line *lp;
size_t len;
int lineno;
BUF *res;
len = strlen(data);
if ((dlines = rcs_splitlines(data)) == NULL)
return (NULL);
if ((plines = rcs_splitlines(patch)) == NULL)
return (NULL);
if (p(dlines, plines) < 0) {
rcs_freelines(dlines);
rcs_freelines(plines);
return (NULL);
}
lineno = 0;
res = rcs_buf_alloc(len, BUF_AUTOEXT);
TAILQ_FOREACH(lp, &dlines->l_lines, l_list) {
if (lineno != 0)
rcs_buf_fappend(res, "%s\n", lp->l_line);
lineno++;
}
rcs_freelines(dlines);
rcs_freelines(plines);
return (res);
}
/*
* rcs_yesno()
*
* Read from standart input for `y' or `Y' character.
* Returns 0 on success, or -1 on failure.
*/
int
rcs_yesno(void)
{
int c, ret;
ret = 0;
fflush(stderr);
fflush(stdout);
if ((c = getchar()) != 'y' && c != 'Y')
ret = -1;
else
while (c != EOF && c != '\n')
c = getchar();
return (ret);
}
/*
* rcs_strsplit()
*
* Split a string <str> of <sep>-separated values and allocate
* an argument vector for the values found.
*/
struct rcs_argvector *
rcs_strsplit(char *str, const char *sep)
{
struct rcs_argvector *av;
size_t i = 0;
char **nargv;
char *cp, *p;
cp = xstrdup(str);
av = xmalloc(sizeof(*av));
av->str = cp;
av->argv = xcalloc(i + 1, sizeof(*(av->argv)));
while ((p = strsep(&cp, sep)) != NULL) {
av->argv[i++] = p;
nargv = xrealloc(av->argv,
i + 1, sizeof(*(av->argv)));
av->argv = nargv;
}
av->argv[i] = NULL;
return (av);
}
/*
* rcs_argv_destroy()
*
* Free an argument vector previously allocated by rcs_strsplit().
*/
void
rcs_argv_destroy(struct rcs_argvector *av)
{
xfree(av->str);
xfree(av->argv);
xfree(av);
}
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