jabberd2  2.2.16
sx/chain.c
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00001 /*
00002  * jabberd - Jabber Open Source Server
00003  * Copyright (c) 2002 Jeremie Miller, Thomas Muldowney,
00004  *                    Ryan Eatmon, Robert Norris
00005  *
00006  * This program is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU General Public License as published by
00008  * the Free Software Foundation; either version 2 of the License, or
00009  * (at your option) any later version.
00010  *
00011  * This program is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the
00014  * GNU General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU General Public License
00017  * along with this program; if not, write to the Free Software
00018  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA02111-1307USA
00019  */
00020 
00021 /* manage and run the io and nad chains */
00022 
00023 #include "sx.h"
00024 
00025 void _sx_chain_io_plugin(sx_t s, sx_plugin_t p) {
00026     _sx_chain_t cn, tail;
00027 
00028     _sx_debug(ZONE, "adding io plugin");
00029 
00030     cn = (_sx_chain_t) malloc(sizeof(struct _sx_chain_st));
00031     cn->p = p;
00032     
00033     if(s->wio == NULL) {
00034         s->wio = cn;
00035         cn->wnext = NULL;
00036     } else {
00037         cn->wnext = s->wio;
00038         s->wio = cn;
00039     }
00040 
00041     if(s->rio == NULL)
00042         s->rio = cn;
00043     else {
00044         for(tail = s->rio; tail->rnext != NULL; tail = tail->rnext);
00045         tail->rnext = cn;
00046     }
00047     cn->rnext = NULL;
00048 }
00049 
00050 void _sx_chain_nad_plugin(sx_t s, sx_plugin_t p) {
00051     _sx_chain_t cn, tail;
00052 
00053     _sx_debug(ZONE, "adding nad plugin");
00054 
00055     cn = (_sx_chain_t) malloc(sizeof(struct _sx_chain_st));
00056     cn->p = p;
00057     
00058     if(s->wnad == NULL) {
00059         s->wnad = cn;
00060         cn->wnext = NULL;
00061     } else {
00062         cn->wnext = s->wnad;
00063         s->wnad = cn;
00064     }
00065 
00066     if(s->rnad == NULL)
00067         s->rnad = cn;
00068     else {
00069         for(tail = s->rnad; tail->rnext != NULL; tail = tail->rnext);
00070         tail->rnext = cn;
00071     }
00072     cn->rnext = NULL;
00073 }
00074 
00075 int _sx_chain_io_write(sx_t s, sx_buf_t buf) {
00076     _sx_chain_t scan;
00077     int ret = 1;
00078 
00079     _sx_debug(ZONE, "calling io write chain");
00080 
00081     for(scan = s->wio; scan != NULL; scan = scan->wnext)
00082         if(scan->p->wio != NULL)
00083             if((ret = (scan->p->wio)(s, scan->p, buf)) <= 0)
00084                 return ret;
00085 
00086     return ret;
00087 }
00088 
00089 int _sx_chain_io_read(sx_t s, sx_buf_t buf) {
00090     _sx_chain_t scan;
00091     int ret = 1;
00092 
00093     _sx_debug(ZONE, "calling io read chain");
00094 
00095     for(scan = s->rio; scan != NULL; scan = scan->rnext)
00096         if(scan->p->rio != NULL)
00097             if((ret = (scan->p->rio)(s, scan->p, buf)) <= 0)
00098                 return ret;
00099 
00100     return ret;
00101 }
00102 
00103 int _sx_chain_nad_write(sx_t s, nad_t nad, int elem) {
00104     _sx_chain_t scan;
00105 
00106     _sx_debug(ZONE, "calling nad write chain");
00107 
00108     for(scan = s->wnad; scan != NULL; scan = scan->wnext)
00109         if(scan->p->wnad != NULL)
00110             if((scan->p->wnad)(s, scan->p, nad, elem) == 0)
00111                 return 0;
00112 
00113     return 1;
00114 }
00115 
00116 int _sx_chain_nad_read(sx_t s, nad_t nad) {
00117     _sx_chain_t scan;
00118 
00119     _sx_debug(ZONE, "calling nad read chain");
00120 
00121     for(scan = s->rnad; scan != NULL; scan = scan->rnext)
00122         if(scan->p->rnad != NULL)
00123             if((scan->p->rnad)(s, scan->p, nad) == 0)
00124                 return 0;
00125 
00126     return 1;
00127 }