From c4b63c13029b9d731b826ffab4a9d59005b0c6a5 Mon Sep 17 00:00:00 2001 From: Christian Grothoff Date: Wed, 28 Jan 2015 20:37:51 +0100 Subject: move PostGres-specific logic out of libtalerutil --- src/util/db.c | 217 ---------------------------------------------------------- 1 file changed, 217 deletions(-) delete mode 100644 src/util/db.c (limited to 'src/util/db.c') diff --git a/src/util/db.c b/src/util/db.c deleted file mode 100644 index c048a30f..00000000 --- a/src/util/db.c +++ /dev/null @@ -1,217 +0,0 @@ -/* - This file is part of TALER - (C) 2014 Christian Grothoff (and other contributing authors) - - TALER is free software; you can redistribute it and/or modify it under the - terms of the GNU General Public License as published by the Free Software - Foundation; either version 3, or (at your option) any later version. - - TALER is distributed in the hope that it will be useful, but WITHOUT ANY - WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR - A PARTICULAR PURPOSE. See the GNU General Public License for more details. - - You should have received a copy of the GNU General Public License along with - TALER; see the file COPYING. If not, If not, see -*/ -/** - * @file util/db.c - * @brief helper functions for DB interactions - * @author Sree Harsha Totakura - * @author Florian Dold - * @author Christian Grothoff - */ -#include "platform.h" -#include -#include "taler_db_lib.h" - - -/** - * Execute a prepared statement. - */ -PGresult * -TALER_DB_exec_prepared (PGconn *db_conn, - const char *name, - const struct TALER_DB_QueryParam *params) -{ - unsigned len; - unsigned i; - - /* count the number of parameters */ - { - const struct TALER_DB_QueryParam *x; - for (len = 0, x = params; - x->more; - len++, x++); - } - - /* new scope to allow stack allocation without alloca */ - - { - void *param_values[len]; - int param_lengths[len]; - int param_formats[len]; - - for (i = 0; i < len; i += 1) - { - param_values[i] = (void *) params[i].data; - param_lengths[i] = params[i].size; - param_formats[i] = 1; - } - return PQexecPrepared (db_conn, name, len, - (const char **) param_values, - param_lengths, - param_formats, 1); - } -} - - -/** - * Extract results from a query result according to the given specification. - * If colums are NULL, the destination is not modified, and #GNUNET_NO - * is returned. - * - * @return - * #GNUNET_YES if all results could be extracted - * #GNUNET_NO if at least one result was NULL - * #GNUNET_SYSERR if a result was invalid (non-existing field) - */ -int -TALER_DB_extract_result (PGresult *result, - struct TALER_DB_ResultSpec *rs, - int row) -{ - int had_null = GNUNET_NO; - size_t len; - unsigned int i; - unsigned int j; - - for (i=0; NULL != rs[i].fname; i++) - { - int fnum; - - fnum = PQfnumber (result, rs[i].fname); - if (fnum < 0) - { - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - "field '%s' does not exist in result\n", - rs->fname); - return GNUNET_SYSERR; - } - - /* if a field is null, continue but - * remember that we now return a different result */ - if (PQgetisnull (result, row, fnum)) - { - had_null = GNUNET_YES; - continue; - } - const char *res; - len = PQgetlength (result, row, fnum); - if ( (0 != rs[i].dst_size) && - (rs[i].dst_size != len) ) - { - GNUNET_log (GNUNET_ERROR_TYPE_ERROR, - "field '%s' has wrong size (got %d, expected %d)\n", - rs[i].fname, - (int) len, - (int) rs->dst_size); - for (j=0;jdst_size) - *(void**) rs->dst = GNUNET_malloc (*rs->result_size = len); - memcpy (rs->dst, - res, - len); - } - if (GNUNET_YES == had_null) - return GNUNET_NO; - return GNUNET_YES; -} - - -int -TALER_DB_field_isnull (PGresult *result, - int row, - const char *fname) -{ - int fnum; - - fnum = PQfnumber (result, fname); - GNUNET_assert (fnum >= 0); - if (PQgetisnull (result, row, fnum)) - return GNUNET_YES; - return GNUNET_NO; -} - - -int -TALER_DB_extract_amount_nbo (PGresult *result, - int row, - const char *val_name, - const char *frac_name, - const char *curr_name, - struct TALER_AmountNBO *r_amount_nbo) -{ - int val_num; - int frac_num; - int curr_num; - int len; - - GNUNET_assert (NULL != strstr (val_name, "_val")); - GNUNET_assert (NULL != strstr (frac_name, "_frac")); - GNUNET_assert (NULL != strstr (curr_name, "_curr")); - - val_num = PQfnumber (result, val_name); - GNUNET_assert (val_num >= 0); - frac_num = PQfnumber (result, frac_name); - GNUNET_assert (frac_num >= 0); - curr_num = PQfnumber (result, curr_name); - GNUNET_assert (curr_num >= 0); - - r_amount_nbo->value = *(uint32_t *) PQgetvalue (result, row, val_num); - r_amount_nbo->fraction = *(uint32_t *) PQgetvalue (result, row, frac_num); - memset (r_amount_nbo->currency, 0, TALER_CURRENCY_LEN); - // FIXME: overflow? - len = PQgetlength (result, row, curr_num); - len = GNUNET_MIN (TALER_CURRENCY_LEN, len); - memcpy (r_amount_nbo->currency, PQgetvalue (result, row, curr_num), len); - r_amount_nbo->currency[TALER_CURRENCY_LEN - 1] = '\0'; - - return GNUNET_OK; -} - - -int -TALER_DB_extract_amount (PGresult *result, - int row, - const char *val_name, - const char *frac_name, - const char *curr_name, - struct TALER_Amount *r_amount) -{ - struct TALER_AmountNBO amount_nbo; - - (void) - TALER_DB_extract_amount_nbo (result, - row, - val_name, - frac_name, - curr_name, - &amount_nbo); - r_amount->value = ntohl (amount_nbo.value); - r_amount->fraction = ntohl (amount_nbo.fraction); - (void) strncpy (r_amount->currency, amount_nbo.currency, TALER_CURRENCY_LEN); - - return GNUNET_OK; -} - -/* end of util/db.c */ -- cgit v1.2.3