mirror of
https://github.com/AuxXxilium/kmod.git
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dea2dfee9b
It has changed in the past, and these days, anyone can get a copy of the LGPL via the web rather than by post. Like 657a122 (Remove FSF mailing address) in libabc by Josh Tripplet, but let the FSF website in which the license can be found.
129 lines
2.5 KiB
C
129 lines
2.5 KiB
C
/*
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* libkmod - interface to kernel module operations
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*
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* Copyright (C) 2011-2013 ProFUSION embedded systems
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* Copyright (C) 2014 Intel Corporation. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <assert.h>
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#include <stdbool.h>
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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 "strbuf.h"
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#define BUF_STEP 128
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static bool buf_grow(struct strbuf *buf, size_t newsize)
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{
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void *tmp;
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size_t sz;
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if (newsize <= buf->size)
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return true;
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if (newsize % BUF_STEP == 0)
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sz = newsize;
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else
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sz = ((newsize / BUF_STEP) + 1) * BUF_STEP;
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tmp = realloc(buf->bytes, sz);
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if (sz > 0 && tmp == NULL)
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return false;
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buf->bytes = tmp;
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buf->size = sz;
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return true;
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}
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void strbuf_init(struct strbuf *buf)
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{
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buf->bytes = NULL;
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buf->size = 0;
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buf->used = 0;
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}
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void strbuf_release(struct strbuf *buf)
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{
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free(buf->bytes);
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}
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char *strbuf_steal(struct strbuf *buf)
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{
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char *bytes;
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bytes = realloc(buf->bytes, buf->used + 1);
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if (!bytes) {
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free(buf->bytes);
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return NULL;
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}
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bytes[buf->used] = '\0';
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return bytes;
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}
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const char *strbuf_str(struct strbuf *buf)
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{
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if (!buf_grow(buf, buf->used + 1))
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return NULL;
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buf->bytes[buf->used] = '\0';
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return buf->bytes;
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}
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bool strbuf_pushchar(struct strbuf *buf, char ch)
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{
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if (!buf_grow(buf, buf->used + 1))
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return false;
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buf->bytes[buf->used] = ch;
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buf->used++;
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return true;
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}
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unsigned strbuf_pushchars(struct strbuf *buf, const char *str)
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{
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unsigned int len;
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assert(str != NULL);
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assert(buf != NULL);
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len = strlen(str);
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if (!buf_grow(buf, buf->used + len))
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return 0;
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memcpy(buf->bytes + buf->used, str, len);
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buf->used += len;
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return len;
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}
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void strbuf_popchar(struct strbuf *buf)
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{
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assert(buf->used > 0);
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buf->used--;
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}
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void strbuf_popchars(struct strbuf *buf, unsigned n)
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{
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assert(buf->used >= n);
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buf->used -= n;
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}
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void strbuf_clear(struct strbuf *buf)
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{
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buf->used = 0;
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}
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