/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- * $Id: gxsnmp_database_table.c,v 1.2 2000/09/22 16:02:37 gregm Exp $ * * Copyright 2000 Larry Liimatainen * gxsnmp_database_table.c -- database table interface. * * This program 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 2 of the License, or * (at your option) any later version. * * This program 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 this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Cambridge, MA 02139, USA. * * gxsnmp_database_table.c * */ #ifdef HAVE_CONFIG_H #include #endif #include #include "gxsnmp_database_table.h" /**************************************************************************** * Private methods to this module **/ /** Caculate the size of all the fields in a table. **/ gint gxsnmp_db_field_size (GList *gl) { gxsnmp_db_field *field; gint i; i = 0; while (gl) { field = (gxsnmp_db_field *)gl->data; switch (field->type) { case TD_GUINT: case TD_GINT: case TD_PGUINT: case TD_PGINT: i += sizeof (gint); break; case TD_GSTR: case TD_PGSTR: case TD_PGL: i += sizeof (gpointer); break; case TD_GDOUBLE: case TD_PGDOUBLE: i += sizeof (gdouble); break; default: g_warning ("Unknown field type for %s,\n", field->name); break; } gl = g_list_next (gl); } return i; } /** Set the field offets **/ gint gxsnmp_db_fields_offset (GList *gl) { gxsnmp_db_field *field; gint offset; offset = 0; while (gl) { field = (gxsnmp_db_field *)gl->data; field->offset = offset; switch (field->type) { case TD_GUINT: case TD_GINT: case TD_PGUINT: case TD_PGINT: offset += sizeof (gint); break; case TD_GSTR: case TD_PGSTR: case TD_PGL: offset += sizeof (gpointer); break; case TD_GDOUBLE: case TD_PGDOUBLE: offset += sizeof (gdouble); break; default: g_warning ("Unknown field type for %s.\n", field->name); break; } gl = g_list_next (gl); } return 0; } /**************************************************************************** * Private data to this module. **/ GList *table_desc = NULL; /* List of table descriptors */ /**************************************************************************** * Public functions. **/ /** * gxsnmp_db_table_size: * -- This and the offset code should probably be collapsed into a one * pass thing. **/ gint gxsnmp_db_table_size () { gxsnmp_db_table *table; GList *gl; gint i; gl = table_desc; while (gl) { table = (gxsnmp_db_table *)gl->data; i = sizeof(gpointer) * 5; i += gxsnmp_db_field_size ((GList *)table->fields); table->size = i; gl = g_list_next (gl); } return 0; } /** * gxsnmp_db_table_offset: * * -- Collapse this function and the previous one into a signal pass. **/ gint gxsnmp_db_table_offset () { gxsnmp_db_table *table; GList *gl; gl = table_desc; while (gl) { table = (gxsnmp_db_table *)gl->data; gxsnmp_db_fields_offset ((GList *)table->fields); gl = g_list_next (gl); } return 0; } /** * gxsnmp_db_field_new: * * Allocate a new gxsnmp_db_field structure and return a pointer to * the freshly allocated structure. * * Return value: The freshly allocated pointer, NULL is returned on * failure. **/ gxsnmp_db_field * gxsnmp_db_field_new() { gxsnmp_db_field *retval; /* TODO: Add ref counting. */ retval = g_malloc0 (sizeof (gxsnmp_db_field *)); return (retval != NULL) ? retval : NULL; } /** * gxsnmp_db_field_offset: * @table: The gxsnmp_db_table_descriptor for the table in question. * @name: The field entry's name we are after. * * Will lookup and return the offset into a table for the given field * passed in through the field argument. * * Return value: Offset to the member in the structure, -1 otherwise. **/ gint gxsnmp_db_field_offset (gxsnmp_db_table *table, const gchar *name) { GList *gl; gxsnmp_db_field *field; gl = table->fields; while (gl) { field = gl->data; if (!g_strncasecmp (name, field->name, strlen (field->name))) return field->offset; gl = g_list_next (gl); } return -1; } /** * gxsnmp_db_field_type: * @table: The gxsnmp_db_table_descriptor for the table in question. * @name: The field entry's name we are after. * * This function will lookup and return the type of the field for a * given field in a given table. * * Return value: field type or -1 on error. **/ gint gxsnmp_db_field_type (gxsnmp_db_table *table, const gchar *name) { GList *gl; gxsnmp_db_field *field; gl = table->fields; while (gl) { field = gl->data; if (!g_strncasecmp (name, field->name, strlen (field->name))) return field->type; gl = g_list_next (gl); } return -1; } /** * gxsnmp_db_table_new: * * Allocate and initialize the storage for a new table. * * Return value: A newly allocated gxsnmp_db_table structure, NULL on failure. **/ gxsnmp_db_table * gxsnmp_db_table_new () { gxsnmp_db_table *retval; /* TODO: add ref counting here. */ retval = g_malloc0 (sizeof (gxsnmp_db_table *)); retval->fields = NULL; return (retval != NULL) ? retval : NULL; } /** * gxsnmp_db_table_find: * @name: The name of the table we are searching for. * * This function will find a table by its name. * * Return value: The gxsnmp_db_table_descriptor of the table in question, * NULL if not found. **/ gxsnmp_db_table * gxsnmp_db_table_find (const gchar *name) { GList *gl; gxsnmp_db_table *table; gl = table_desc; while (gl) { table = gl->data; if (!g_strncasecmp (name, table->name, strlen (table->name))) return table; gl = g_list_next (gl); } return NULL; } /* EOF */