97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/*
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This file is part of TALER
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Copyright (C) 2014 GNUnet e.V.
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* @file util.c
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* @brief Common utility functions; we might choose to move those to GNUnet at some point
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* @author Sree Harsha Totakura <sreeharsha@totakura.in>
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* @author Florian Dold
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* @author Benedikt Mueller
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*/
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#include "platform.h"
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#include "taler_util.h"
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#include <gcrypt.h>
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/**
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* Convert a buffer to an 8-character string
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* representative of the contents. This is used
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* for logging binary data when debugging.
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*
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* @param buf buffer to log
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* @param buf_size number of bytes in @a buf
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* @return text representation of buf, valid until next
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* call to this function
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*/
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const char *
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TALER_b2s (const void *buf,
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size_t buf_size)
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{
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static char ret[9];
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struct GNUNET_HashCode hc;
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char *tmp;
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GNUNET_CRYPTO_hash (buf,
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buf_size,
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&hc);
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tmp = GNUNET_STRINGS_data_to_string_alloc (&hc,
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sizeof (hc));
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memcpy (ret,
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tmp,
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8);
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GNUNET_free (tmp);
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ret[8] = '\0';
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return ret;
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}
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/**
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* Obtain denomination amount from configuration file.
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*
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* @param cfg configuration to use
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* @param section section of the configuration to access
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* @param option option of the configuration to access
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* @param[out] denom set to the amount found in configuration
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* @return #GNUNET_OK on success, #GNUNET_SYSERR on error
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*/
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int
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TALER_config_get_denom (const struct GNUNET_CONFIGURATION_Handle *cfg,
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const char *section,
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const char *option,
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struct TALER_Amount *denom)
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{
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char *str;
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if (GNUNET_OK !=
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GNUNET_CONFIGURATION_get_value_string (cfg,
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section,
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option,
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&str))
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return GNUNET_NO;
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if (GNUNET_OK != TALER_string_to_amount (str,
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denom))
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{
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GNUNET_free (str);
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return GNUNET_SYSERR;
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}
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GNUNET_free (str);
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return GNUNET_OK;
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}
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/* end of util.c */
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