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/* str/join.c - Join two strings together
* Copyright (C) 2001,2005 Bruce Guenter <bruce@untroubled.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <string.h>
#include "str.h"
/** Join two strings together with exactly one instance of the seperator. */
int str_join(str* s, char sep, const str* in)
{
return str_joinb(s, sep, in->s, in->len);
}
/** Join a C string to this string */
int str_joins(str* s, char sep, const char* in)
{
return str_joinb(s, sep, in, strlen(in));
}
/** Join a binary block to this string */
int str_joinb(str* s, char sep, const char* in, unsigned len)
{
unsigned len1;
unsigned off2;
unsigned len2;
len1 = s->len;
while (len1 > 0 && s->s[len1-1] == sep) --len1;
off2 = 0;
while (off2 < len && in[off2] == sep) ++off2;
len2 = len - off2;
if (!str_realloc(s, len1+1+len2)) return 0;
s->s[len1++] = sep;
memcpy(s->s+len1, in+off2, len2);
s->len = len1 + len2;
s->s[s->len] = 0;
return 1;
}
#ifdef SELFTEST_MAIN
MAIN
{
static str s;
debugstrfn(str_copys(&s, "one//"), &s);
debugstrfn(str_joins(&s, '/', "two"), &s);
debugstrfn(str_joins(&s, '/', "//three/"), &s);
}
#endif
#ifdef SELFTEST_EXP
result=1 len=5 size=16 s=one//
result=1 len=7 size=16 s=one/two
result=1 len=14 size=16 s=one/two/three/
#endif
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