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* A bare-bones string stream.
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/* nettle, low-level cryptographics library
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* Copyright (C) 2002 Niels M�ller
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* The nettle library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or (at your
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* option) any later version.
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* The nettle library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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* You should have received a copy of the GNU Lesser General Public License
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* along with the nettle library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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nettle_buffer_grow(struct nettle_buffer *buffer,
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assert(buffer->size <= buffer->alloc);
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if (buffer->size + length > buffer->alloc)
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alloc = buffer->alloc * 2 + length + 100;
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p = buffer->realloc(buffer->realloc_ctx, buffer->contents, alloc);
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buffer->alloc = alloc;
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nettle_buffer_init_realloc(struct nettle_buffer *buffer,
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nettle_realloc_func realloc)
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buffer->contents = NULL;
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buffer->realloc = realloc;
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buffer->realloc_ctx = realloc_ctx;
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nettle_buffer_init_size(struct nettle_buffer *buffer,
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unsigned length, uint8_t *space)
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buffer->contents = space;
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buffer->alloc = length;
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buffer->realloc = NULL;
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buffer->realloc_ctx = NULL;
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nettle_buffer_clear(struct nettle_buffer *buffer)
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buffer->realloc(buffer->realloc_ctx, buffer->contents, 0);
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buffer->contents = NULL;
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nettle_buffer_reset(struct nettle_buffer *buffer)
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nettle_buffer_space(struct nettle_buffer *buffer,
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if (!nettle_buffer_grow(buffer, length))
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p = buffer->contents + buffer->size;
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buffer->size += length;
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nettle_buffer_write(struct nettle_buffer *buffer,
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unsigned length, const uint8_t *data)
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uint8_t *p = nettle_buffer_space(buffer, length);
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memcpy(p, data, length);
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nettle_buffer_copy(struct nettle_buffer *dst,
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const struct nettle_buffer *src)
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return nettle_buffer_write(dst, src->size, src->contents);