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99 lines
2.2 KiB
C
99 lines
2.2 KiB
C
/* sexp-transport-format.c
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Writing s-expressions in transport format.
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Copyright (C) 2002 Niels Möller
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This file is part of GNU Nettle.
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GNU Nettle is free software: you can redistribute it and/or
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modify it under the terms of either:
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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or both in parallel, as here.
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GNU Nettle 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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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see http://www.gnu.org/licenses/.
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*/
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#if HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "sexp.h"
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#include "base64.h"
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#include "buffer.h"
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static inline void
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base64_encode_in_place (size_t length, uint8_t *data)
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{
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base64_encode_raw ((char *) data, length, data);
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}
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size_t
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sexp_transport_vformat(struct nettle_buffer *buffer,
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const char *format, va_list args)
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{
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size_t start = 0;
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size_t length;
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size_t base64_length;
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if (buffer)
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{
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if (!NETTLE_BUFFER_PUTC(buffer, '{'))
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return 0;
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start = buffer->size;
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}
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length = sexp_vformat(buffer, format, args);
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if (!length)
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return 0;
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base64_length = BASE64_ENCODE_RAW_LENGTH(length);
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if (buffer)
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{
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if (!nettle_buffer_space(buffer, base64_length - length))
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return 0;
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base64_encode_in_place(length, buffer->contents + start);
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if (!NETTLE_BUFFER_PUTC(buffer, '}'))
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return 0;
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}
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return base64_length + 2;
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}
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size_t
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sexp_transport_format(struct nettle_buffer *buffer,
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const char *format, ...)
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{
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size_t done;
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va_list args;
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va_start(args, format);
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done = sexp_transport_vformat(buffer, format, args);
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va_end(args);
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return done;
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}
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