134e17798c
Approved by: trasz MFC after: 1 month Sponsored by: Conclusive Engineering (development), vStack.com (funding)
128 lines
2.9 KiB
C
128 lines
2.9 KiB
C
/*
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* Copyright 2016 Jakub Klama <jceel@FreeBSD.org>
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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 providing 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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* 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,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/*
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* Minimal libsbuf reimplementation for Mac OS X.
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*/
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#include <stdlib.h>
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#include <unistd.h>
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#include <string.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include "sbuf.h"
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#define SBUF_INITIAL_SIZE 128
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struct sbuf *
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sbuf_new_auto()
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{
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struct sbuf *s;
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s = malloc(sizeof(struct sbuf));
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s->s_buf = calloc(1, SBUF_INITIAL_SIZE + 1);
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s->s_capacity = s->s_buf != NULL ? SBUF_INITIAL_SIZE : 0;
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s->s_size = 0;
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return (s);
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}
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int
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sbuf_cat(struct sbuf *s, const char *str)
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{
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int req = (int)strlen(str);
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if (s->s_size + req >= s->s_capacity) {
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s->s_capacity = s->s_size + req + 1;
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s->s_buf = realloc(s->s_buf, (size_t)s->s_capacity);
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}
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if (s->s_buf == NULL)
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return (-1);
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strcpy(s->s_buf + s->s_size, str);
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s->s_size += req;
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return (0);
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}
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int
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sbuf_printf(struct sbuf *s, const char *fmt, ...)
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{
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int ret;
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va_list ap;
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va_start(ap, fmt);
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ret = sbuf_vprintf(s, fmt, ap);
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va_end(ap);
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return (ret);
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}
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int
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sbuf_vprintf(struct sbuf *s, const char *fmt, va_list args)
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{
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va_list copy;
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int req;
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va_copy(copy, args);
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req = vsnprintf(NULL, 0, fmt, copy);
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va_end(copy);
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if (s->s_size + req >= s->s_capacity) {
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s->s_capacity = s->s_size + req + 1;
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s->s_buf = realloc(s->s_buf, (size_t)s->s_capacity);
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}
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if (s->s_buf == NULL)
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return (-1);
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req = vsnprintf(s->s_buf + s->s_size, req + 1, fmt, args);
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s->s_size += req;
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return (0);
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}
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char *
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sbuf_data(struct sbuf *s)
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{
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return (s->s_buf);
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}
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int
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sbuf_finish(struct sbuf *s)
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{
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if (s->s_buf != NULL)
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s->s_buf[s->s_size] = '\0';
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return (0);
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}
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void
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sbuf_delete(struct sbuf *s)
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{
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free(s->s_buf);
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free(s);
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}
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