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/* |
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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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/* |
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* Counted strings |
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*/ |
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#include <stdlib.h> |
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#include <string.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(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(struct string *buf, const char *str, 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 + |
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len + (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(struct string *buf, const char *str, 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(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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} |