1 files changed, 163 insertions, 0 deletions
diff --git a/src/include/gnunet_postgres_lib.h b/src/include/gnunet_postgres_lib.h
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+++ b/src/include/gnunet_postgres_lib.h
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+/*
+     This file is part of GNUnet
+     (C) 2012 Christian Grothoff (and other contributing authors)
+
+     GNUnet 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.
+
+     GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+*/
+/**
+ * @file include/gnunet_postgres_lib.h
+ * @brief library to help with access to a Postgres database
+ * @author Christian Grothoff
+ */
+#ifndef GNUNET_POSTGRES_LIB_H
+#define GNUNET_POSTGRES_LIB_H
+
+#include "gnunet_util_lib.h"
+#include <postgresql/libpq-fe.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#if 0                           /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+
+/**
+ * Check if the result obtained from Postgres has
+ * the desired status code.  If not, log an error, clear the
+ * result and return GNUNET_SYSERR.
+ *
+ * @param dbh database handle
+ * @param ret return value from database operation to check
+ * @param expected_status desired status
+ * @param command description of the command that was run
+ * @param args arguments given to the command 
+ * @param filename name of the source file where the command was run
+ * @param line line number in the source file
+ * @return GNUNET_OK if the result is acceptable
+ */
+int
+GNUNET_POSTGRES_check_result_ (PGconn *dbh, PGresult * ret, int expected_status,
+			       const char *command, const char *args,
+			       const char *filename, int line);
+
+
+/**
+ * Check if the result obtained from Postgres has
+ * the desired status code.  If not, log an error, clear the
+ * result and return GNUNET_SYSERR.
+ *
+ * @param dbh database handle
+ * @param ret return value from database operation to check
+ * @param expected_status desired status
+ * @param command description of the command that was run
+ * @param args arguments given to the command 
+ * @return GNUNET_OK if the result is acceptable
+ */
+#define GNUNET_POSTGRES_check_result(dbh,ret,expected_status,command,args) GNUNET_POSTGRES_check_result_(dbh,ret,expected_status,command,args,__FILE__,__LINE__)
+
+
+/**
+ * Run simple SQL statement (without results).
+ *
+ * @param dbh database handle
+ * @param sql statement to run
+ * @param filename filename for error reporting
+ * @param line code line for error reporting 
+ * @return GNUNET_OK on success
+ */
+int
+GNUNET_POSTGRES_exec_ (PGconn *dbh, const char *sql, const char *filename, int line);
+
+
+/**
+ * Run simple SQL statement (without results).
+ *
+ * @param dbh database handle
+ * @param sql statement to run
+ * @return GNUNET_OK on success
+ */
+#define GNUNET_POSTGRES_exec(dbh,sql) GNUNET_POSTGRES_exec_(dbh,sql,__FILE__,__LINE__)
+
+
+/**
+ * Prepare SQL statement.
+ *
+ * @param dbh database handle
+ * @param name name for the prepared SQL statement
+ * @param sql SQL code to prepare
+ * @param nparms number of parameters in sql
+ * @param filename filename for error reporting
+ * @param line code line for error reporting
+ * @return GNUNET_OK on success
+ */
+int
+GNUNET_POSTGRES_prepare_ (PGconn *dbh, const char *name, const char *sql,
+			  int nparms,
+			  const char *filename, int line);
+
+
+/**
+ * Prepare SQL statement.
+ *
+ * @param dbh database handle
+ * @param name name for the prepared SQL statement
+ * @param sql SQL code to prepare
+ * @param nparams number of parameters in sql
+ * @return GNUNET_OK on success
+ */
+#define GNUNET_POSTGRES_prepare(dbh,name,sql,nparams) GNUNET_POSTGRES_prepare_(dbh,name,sql,nparams,__FILE__,__LINE__)
+
+
+/**
+ * Connect to a postgres database
+ *
+ * @param cfg configuration
+ * @param section configuration section to use to get Postgres configuration options
+ * @return the postgres handle
+ */
+PGconn *
+GNUNET_POSTGRES_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
+			 const char *section);
+
+
+/**
+ * Delete the row identified by the given rowid (qid
+ * in postgres).
+ *
+ * @param dbh database handle
+ * @param stmt name of the prepared statement
+ * @param rowid which row to delete
+ * @return GNUNET_OK on success
+ */
+int
+GNUNET_POSTGRES_delete_by_rowid (PGconn *dbh,
+				 const char *stmt,
+				 uint32_t rowid);
+
+
+
+#if 0                           /* keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+/* end of gnunet_postgres_lib.h */
+#endif