/**
* @file my/my.c
* @brief library to help with access to a MySQL database
+ * @author Christophe Genevey
* @author Christian Grothoff
*/
#include "platform.h"
#include "gnunet_my_lib.h"
-
/**
* Run a prepared SELECT statement.
*
* @param mc mysql context
* @param sh handle to SELECT statment
* @param params parameters to the statement
- * @return mysql result
+ * @return
+ #GNUNET_YES if we can prepare all statement
+ #GNUNET_SYSERR if we can't prepare all statement
*/
-
- /***** FIXE THIS FUNCTION *****/
int
GNUNET_MY_exec_prepared (struct GNUNET_MYSQL_Context *mc,
struct GNUNET_MYSQL_StatementHandle *sh,
- const struct GNUNET_MY_QueryParam *params)
+ struct GNUNET_MY_QueryParam *params)
{
const struct GNUNET_MY_QueryParam *p;
unsigned int num;
MYSQL_BIND qbind[num];
unsigned int off;
- memset(qbind, 0, sizeof(qbind));
+ memset (qbind, 0, sizeof(qbind));
off = 0;
for (i=0;NULL != (p = ¶ms[i])->conv;i++)
{
p,
&qbind[off]))
{
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Conversion for MySQL query failed at offset %u\n",
+ i);
return GNUNET_SYSERR;
}
off += p->num_params;
}
- stmt = GNUNET_MYSQL_statement_get_stmt (mc, sh);
+ stmt = GNUNET_MYSQL_statement_get_stmt (sh);
if (mysql_stmt_bind_param (stmt,
qbind))
{
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, "mysql",
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
+ "my",
_("`%s' failed at %s:%d with error: %s\n"),
- "mysql_stmt_bind_param", __FILE__, __LINE__,
+ "mysql_stmt_bind_param",
+ __FILE__, __LINE__,
mysql_stmt_error (stmt));
GNUNET_MYSQL_statements_invalidate (mc);
return GNUNET_SYSERR;
}
- }
- if (mysql_stmt_execute (stmt))
- {
- GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR, "mysql",
- _("`%s' failed at %s:%d with error: %s\n"),
- "mysql_stmt_execute", __FILE__, __LINE__,
- mysql_stmt_error (stmt));
- GNUNET_MYSQL_statements_invalidate (mc);
- return GNUNET_SYSERR;
+
+ if (mysql_stmt_execute (stmt))
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
+ "my",
+ _("`%s' failed at %s:%d with error: %s\n"),
+ "mysql_stmt_execute", __FILE__, __LINE__,
+ mysql_stmt_error (stmt));
+ GNUNET_MYSQL_statements_invalidate (mc);
+ return GNUNET_SYSERR;
+ }
+ GNUNET_MY_cleanup_query (params,
+ qbind);
}
return GNUNET_OK;
}
/**
- * Extract results from a query result according
- * to the given specification. If colums are NULL,
- * the destination is not modified, and #GNUNET_NO is returned4
+ * Free all memory that was allocated in @a qp during
+ * #GNUNET_MY_exec_prepared().
*
+ * @param qp query specification to clean up
+ * @param qbind array of parameter to clean up
+ */
+void
+GNUNET_MY_cleanup_query (struct GNUNET_MY_QueryParam *qp,
+ MYSQL_BIND *qbind)
+{
+ unsigned int i;
+
+ for (i=0; NULL != qp[i].conv ;i++)
+ if (NULL != qp[i].cleaner)
+ qp[i].cleaner (qp[i].conv_cls,
+ &qbind[i]);
+}
+
+
+/**
+ * Extract results from a query result according to the given
+ * specification. Always fetches the next row.
*
- * @param result
- * @param row, the row from the result to extract
- * @param result specificatio to extract for
+ * @param sh statement that returned results
+ * @param rs specification to extract for
* @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
-*/
+ * #GNUNET_YES if all results could be extracted
+ * #GNUNET_NO if there is no more data in the result set
+ * #GNUNET_SYSERR if a result was invalid
+ */
int
GNUNET_MY_extract_result (struct GNUNET_MYSQL_StatementHandle *sh,
- struct GNUNET_MY_QueryParam *qp,
- struct GNUNET_MY_ResultSpec *rs,
- int row)
+ struct GNUNET_MY_ResultSpec *rs)
{
- MYSQL_BIND * result;
+ unsigned int num_fields;
unsigned int i;
- int had_null = GNUNET_NO;
int ret;
MYSQL_STMT *stmt;
- stmt = GNUNET_MYSQL_statement_get_stmt (NULL /* FIXME */, sh);
- // result = mysql_get_result (stmt);
- result = NULL;
- for (i = 0 ; NULL != rs[i].conv ; i++)
+ stmt = GNUNET_MYSQL_statement_get_stmt (sh);
+ if (NULL == stmt)
+ {
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ if (NULL == rs)
{
- struct GNUNET_MY_ResultSpec *spec;
+ mysql_stmt_free_result (stmt);
+ return GNUNET_NO;
+ }
- spec = &rs[i];
- ret = spec->conv (spec->conv_cls,
- qp,
- result);
+ num_fields = 0;
+ for (i=0;NULL != rs[i].pre_conv;i++)
+ num_fields += rs[i].num_fields;
+
+ if (mysql_stmt_field_count (stmt) != num_fields)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Number of fields missmatch between SQL result and result specification\n");
+ return GNUNET_SYSERR;
+ }
- if (GNUNET_SYSERR == ret)
+ {
+ MYSQL_BIND result[num_fields];
+ unsigned int field_off;
+
+ memset (result, 0, sizeof (MYSQL_BIND) * num_fields);
+ field_off = 0;
+ for (i=0;NULL != rs[i].pre_conv;i++)
+ {
+ struct GNUNET_MY_ResultSpec *rp = &rs[i];
+
+ if (GNUNET_OK !=
+ rp->pre_conv (rp->conv_cls,
+ rp,
+ stmt,
+ field_off,
+ &result[field_off]))
+
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Pre-conversion for MySQL result failed at offset %u\n",
+ i);
+ return GNUNET_SYSERR;
+ }
+ field_off += rp->num_fields;
+ }
+
+ if (mysql_stmt_bind_result (stmt, result))
{
- //GNUNET_MY_cleanup_result(rs);
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
+ "my",
+ _("%s failed at %s:%d with error: %s\n"),
+ "mysql_stmt_bind_result",
+ __FILE__, __LINE__,
+ mysql_stmt_error (stmt));
return GNUNET_SYSERR;
}
+#if TEST_OPTIMIZATION
+ (void) mysql_stmt_store_result (stmt);
+#endif
+ ret = mysql_stmt_fetch (stmt);
+ if (MYSQL_NO_DATA == ret)
+ {
+ mysql_stmt_free_result (stmt);
+ return GNUNET_NO;
+ }
+ if (1 == ret)
+ {
+ GNUNET_log_from (GNUNET_ERROR_TYPE_ERROR,
+ "my",
+ _("%s failed at %s:%d with error: %s\n"),
+ "mysql_stmt_fetch",
+ __FILE__, __LINE__,
+ mysql_stmt_error (stmt));
+ GNUNET_MY_cleanup_result (rs);
+ mysql_stmt_free_result (stmt);
+ return GNUNET_SYSERR;
+ }
+ field_off = 0;
+ for (i=0;NULL != rs[i].post_conv;i++)
+ {
+ struct GNUNET_MY_ResultSpec *rp = &rs[i];
- if (NULL != spec->result_size)
- *spec->result_size = spec->dst_size;
+ if (NULL != rp->post_conv)
+ if (GNUNET_OK !=
+ rp->post_conv (rp->conv_cls,
+ rp,
+ stmt,
+ field_off,
+ &result[field_off]))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ "Post-conversion for MySQL result failed at offset %u\n",
+ i);
+ mysql_stmt_free_result (stmt);
+ GNUNET_MY_cleanup_result (rs);
+ return GNUNET_SYSERR;
+ }
+ field_off += rp->num_fields;
+ }
}
+ return GNUNET_OK;
+}
- if (GNUNET_YES == had_null)
- return GNUNET_NO;
- return GNUNET_OK;
+/**
+ * Free all memory that was allocated in @a rs during
+ * #GNUNET_MY_extract_result().
+ *
+ * @param rs result specification to clean up
+ */
+void
+GNUNET_MY_cleanup_result (struct GNUNET_MY_ResultSpec *rs)
+{
+ unsigned int i;
+
+ for (i=0;NULL != rs[i].post_conv;i++)
+ if (NULL != rs[i].cleaner)
+ rs[i].cleaner (rs[i].conv_cls,
+ &rs[i]);
}
+
/* end of my.c */
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