119 lines
3.0 KiB
C
119 lines
3.0 KiB
C
/*
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* Copyright (c) 1994 Christos Zoulas
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Christos Zoulas.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static char *rcsid = "$Id: str.c,v 1.1 1994/12/04 17:11:04 christos Exp $";
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#endif
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/*
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* Counted strings
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*/
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#include <stdlib.h>
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#include "util.h"
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#include "str.h"
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/*
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* str_init(): Initialize string
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*/
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void
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str_init(s)
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struct string *s;
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{
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s->s_str = NULL;
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s->s_len = 0;
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}
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/*
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* str_append(): Append string allocating buffer as necessary
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*/
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void
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str_append(buf, str, del)
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struct string *buf;
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const char *str;
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int del;
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{
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size_t len = strlen(str) + 1;
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if (buf->s_str == NULL)
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buf->s_str = emalloc(len);
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else {
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buf->s_str = erealloc(buf->s_str, buf->s_len + len +
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(del ? 2 : 1));
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if (del)
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buf->s_str[buf->s_len++] = del;
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}
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memcpy(&buf->s_str[buf->s_len], str, len);
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buf->s_len += len - 1;
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}
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/*
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* str_prepend(): Prepend string allocating buffer as necessary
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*/
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void
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str_prepend(buf, str, del)
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struct string *buf;
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const char *str;
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int del;
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{
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char *ptr, *sptr;
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size_t len = strlen(str) + 1;
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sptr = ptr = emalloc(buf->s_len + len + (del ? 2 : 1));
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if (del)
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*ptr++ = del;
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memcpy(ptr, str, len);
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if (buf->s_str) {
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memcpy(&ptr[len - 1], buf->s_str, buf->s_len + 1);
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free(buf->s_str);
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}
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buf->s_str = sptr;
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buf->s_len += del ? len : len - 1;
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}
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/*
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* str_free(): Free a string
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*/
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void
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str_free(s)
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struct string *s;
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{
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free(s->s_str);
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s->s_str = NULL;
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s->s_len = 0;
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}
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