88c5f205fa
The Buffer code in the VNC server is useful for the IO channel code, so pull it out into a shared module, QIOBuffer. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/*
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* QEMU generic buffers
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*
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* Copyright (c) 2015 Red Hat, Inc.
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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 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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*/
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#include "qemu/buffer.h"
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void buffer_reserve(Buffer *buffer, size_t len)
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{
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if ((buffer->capacity - buffer->offset) < len) {
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buffer->capacity += (len + 1024);
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buffer->buffer = g_realloc(buffer->buffer, buffer->capacity);
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}
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}
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gboolean buffer_empty(Buffer *buffer)
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{
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return buffer->offset == 0;
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}
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uint8_t *buffer_end(Buffer *buffer)
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{
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return buffer->buffer + buffer->offset;
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}
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void buffer_reset(Buffer *buffer)
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{
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buffer->offset = 0;
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}
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void buffer_free(Buffer *buffer)
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{
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g_free(buffer->buffer);
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buffer->offset = 0;
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buffer->capacity = 0;
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buffer->buffer = NULL;
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}
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void buffer_append(Buffer *buffer, const void *data, size_t len)
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{
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memcpy(buffer->buffer + buffer->offset, data, len);
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buffer->offset += len;
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}
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void buffer_advance(Buffer *buffer, size_t len)
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{
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memmove(buffer->buffer, buffer->buffer + len,
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(buffer->offset - len));
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buffer->offset -= len;
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}
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