3 * A bare-bones string stream.
6 /* nettle, low-level cryptographics library
8 * Copyright (C) 2002 Niels Möller
10 * The nettle library is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU Lesser General Public License as published by
12 * the Free Software Foundation; either version 2.1 of the License, or (at your
13 * option) any later version.
15 * The nettle library is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
17 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
18 * License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with the nettle library; see the file COPYING.LIB. If not, write to
22 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
37 nettle_buffer_grow(struct nettle_buffer *buffer,
40 assert(buffer->size <= buffer->alloc);
42 if (buffer->size + length > buffer->alloc)
50 alloc = buffer->alloc * 2 + length + 100;
51 p = buffer->realloc(buffer->realloc_ctx, buffer->contents, alloc);
56 buffer->alloc = alloc;
62 nettle_buffer_init_realloc(struct nettle_buffer *buffer,
64 nettle_realloc_func realloc)
66 buffer->contents = NULL;
68 buffer->realloc = realloc;
69 buffer->realloc_ctx = realloc_ctx;
74 nettle_buffer_init_size(struct nettle_buffer *buffer,
75 unsigned length, uint8_t *space)
77 buffer->contents = space;
78 buffer->alloc = length;
79 buffer->realloc = NULL;
80 buffer->realloc_ctx = NULL;
85 nettle_buffer_clear(struct nettle_buffer *buffer)
88 buffer->realloc(buffer->realloc_ctx, buffer->contents, 0);
90 buffer->contents = NULL;
96 nettle_buffer_reset(struct nettle_buffer *buffer)
102 nettle_buffer_space(struct nettle_buffer *buffer,
107 if (!nettle_buffer_grow(buffer, length))
110 p = buffer->contents + buffer->size;
111 buffer->size += length;
116 nettle_buffer_write(struct nettle_buffer *buffer,
117 unsigned length, const uint8_t *data)
119 uint8_t *p = nettle_buffer_space(buffer, length);
122 memcpy(p, data, length);
130 nettle_buffer_copy(struct nettle_buffer *dst,
131 const struct nettle_buffer *src)
133 return nettle_buffer_write(dst, src->size, src->contents);