libssh/common/xlist.c

	xlist.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
        /*
         * Copyright 2003 Sun Microsystems, Inc.  All rights reserved.
         * Use is subject to license terms.
         */

#pragma ident	"%Z%%M%	%I%	%E% SMI"

#include <stdio.h>
#include <strings.h>
#include "xmalloc.h"
#include "xlist.h"

char **
xsplit(char *list, char sep)
{
    char **a;
    char *p, *q;
    u_int n = 0;

    for (n = 0, p = list ; p && *p ; ) {
	while (p && *p && *p == sep) p++;
	if (!*p) break;
	n++;
	p = strchr(p, sep);
    }
    a = (char **) xmalloc(sizeof(char *) * (n + 2));
    for (n = 0, p = list ; p && *p ; ) {
	while (*p == sep) p++;
	if (!*p) break;
	q = strchr(p, sep);
	if (!q)
	    q = p + strlen(p);
	a[n] = (char *) xmalloc((q - p + 2));
	(void) strncpy(a[n], p, q - p);
	a[n][q - p] = '\0';
	n++;
	if (!*q) break;
	p = q+1;
    }
    a[n] = NULL;
    return a;
}

void
xfree_split_list(char **list)
{
    char **p;
    for (p = list ; p && *p ; p++) {
	xfree(*p);
    }
    xfree(list);
}

char *
xjoin(char **alist, char sep)
{
    char **p;
    char *list;
    char sep_str[2];
    u_int n;

    for (n = 1, p = alist ; p && *p ; p++) {
	if (!*p || !**p) continue;
	n += strlen(*p) + 1;
    }
    list = (char *) xmalloc(n);
    *list = '\0';

    sep_str[0] = sep;
    sep_str[1] = '\0';
    for (p = alist ; p && *p ; p++) {
	if (!*p || !**p) continue;
	if (*list != '\0')
	    (void) strlcat(list, sep_str, n);
	(void) strlcat(list, *p, n);
    }
    return list;
}