1*170ab110SJoe Hershberger /* 2*170ab110SJoe Hershberger * (C) Copyright 2012 3*170ab110SJoe Hershberger * Joe Hershberger, National Instruments, joe.hershberger@ni.com 4*170ab110SJoe Hershberger * 5*170ab110SJoe Hershberger * See file CREDITS for list of people who contributed to this 6*170ab110SJoe Hershberger * project. 7*170ab110SJoe Hershberger * 8*170ab110SJoe Hershberger * This program is free software; you can redistribute it and/or 9*170ab110SJoe Hershberger * modify it under the terms of the GNU General Public License as 10*170ab110SJoe Hershberger * published by the Free Software Foundation; either version 2 of 11*170ab110SJoe Hershberger * the License, or (at your option) any later version. 12*170ab110SJoe Hershberger * 13*170ab110SJoe Hershberger * This program is distributed in the hope that it will be useful, 14*170ab110SJoe Hershberger * but WITHOUT ANY WARRANTY; without even the implied warranty of 15*170ab110SJoe Hershberger * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16*170ab110SJoe Hershberger * GNU General Public License for more details. 17*170ab110SJoe Hershberger * 18*170ab110SJoe Hershberger * You should have received a copy of the GNU General Public License 19*170ab110SJoe Hershberger * along with this program; if not, write to the Free Software 20*170ab110SJoe Hershberger * Foundation, Inc., 59 Temple Place, Suite 330, Boston, 21*170ab110SJoe Hershberger * MA 02111-1307 USA 22*170ab110SJoe Hershberger */ 23*170ab110SJoe Hershberger 24*170ab110SJoe Hershberger #ifndef __ENV_ATTR_H__ 25*170ab110SJoe Hershberger #define __ENV_ATTR_H__ 26*170ab110SJoe Hershberger 27*170ab110SJoe Hershberger #define ENV_ATTR_LIST_DELIM ',' 28*170ab110SJoe Hershberger #define ENV_ATTR_SEP ':' 29*170ab110SJoe Hershberger 30*170ab110SJoe Hershberger /* 31*170ab110SJoe Hershberger * env_attr_walk takes as input an "attr_list" that takes the form: 32*170ab110SJoe Hershberger * attributes = [^,:\s]* 33*170ab110SJoe Hershberger * entry = name[:attributes] 34*170ab110SJoe Hershberger * list = entry[,list] 35*170ab110SJoe Hershberger * It will call the "callback" function with the "name" and attribute as "value" 36*170ab110SJoe Hershberger * The callback may return a non-0 to abort the list walk. 37*170ab110SJoe Hershberger * This return value will be passed through to the caller. 38*170ab110SJoe Hershberger * 0 is returned on success. 39*170ab110SJoe Hershberger */ 40*170ab110SJoe Hershberger extern int env_attr_walk(const char *attr_list, 41*170ab110SJoe Hershberger int (*callback)(const char *name, const char *value)); 42*170ab110SJoe Hershberger 43*170ab110SJoe Hershberger /* 44*170ab110SJoe Hershberger * env_attr_lookup takes as input an "attr_list" with the same form as above. 45*170ab110SJoe Hershberger * It also takes as input a "name" to look for. 46*170ab110SJoe Hershberger * If the name is found in the list, it's value is copied into "attributes". 47*170ab110SJoe Hershberger * There is no protection on attributes being too small for the value. 48*170ab110SJoe Hershberger * It returns -1 if attributes is NULL, 1 if "name" is not found, 2 if 49*170ab110SJoe Hershberger * "attr_list" is NULL. 50*170ab110SJoe Hershberger * Returns 0 on success. 51*170ab110SJoe Hershberger */ 52*170ab110SJoe Hershberger extern int env_attr_lookup(const char *attr_list, const char *name, 53*170ab110SJoe Hershberger char *attributes); 54*170ab110SJoe Hershberger 55*170ab110SJoe Hershberger #endif /* __ENV_ATTR_H__ */ 56