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authorErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
committerErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
commit84adefa331c4159d432d22840663c38f155cd4c1 (patch)
treebff9a9c66adda4df2106dfd0e5c053ab182a12bd /lib/erl_interface/src/registry/reg_get.c
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The R13B03 release.OTP_R13B03
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-rw-r--r--lib/erl_interface/src/registry/reg_get.c94
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diff --git a/lib/erl_interface/src/registry/reg_get.c b/lib/erl_interface/src/registry/reg_get.c
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+/*
+ * %CopyrightBegin%
+ *
+ * Copyright Ericsson AB 1998-2009. All Rights Reserved.
+ *
+ * The contents of this file are subject to the Erlang Public License,
+ * Version 1.1, (the "License"); you may not use this file except in
+ * compliance with the License. You should have received a copy of the
+ * Erlang Public License along with this software. If not, it can be
+ * retrieved online at http://www.erlang.org/.
+ *
+ * Software distributed under the License is distributed on an "AS IS"
+ * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+ * the License for the specific language governing rights and limitations
+ * under the License.
+ *
+ * %CopyrightEnd%
+ *
+
+ */
+#ifdef VXWORKS
+#include <vxWorks.h>
+#endif
+
+#include <stdarg.h>
+#include "reg.h"
+
+/* this is the general "get" function. Values are copied into a buffer
+ * provided by the caller, and the return value indicates success or
+ * failure. This function can get all types except directorys. The user
+ * must specify the type of data he is expecting, or 0 if he doesn't
+ * care. On success, the data type is returned. If the requested data
+ * type does not match the data found, EI_TYPE is returned.
+ */
+int ei_reg_getval(ei_reg *reg, const char *key, int flags, ...)
+{
+ ei_hash *tab;
+ ei_reg_obj *obj=NULL;
+ va_list ap;
+ int rval;
+ int objtype;
+
+ if (!key || !reg) return -1; /* return EI_BADARG; */
+ tab = reg->tab;
+ if (!(obj=ei_hash_lookup(tab,key))) return -1; /* return EI_NOTFOUND; */
+ if (obj->attr & EI_DELET) return -1; /* return EI_NOTFOUND; */
+
+ /* if type was specified then it must match object */
+ objtype = ei_reg_typeof(obj);
+ if (flags && (flags != objtype)) return -1; /* return EI_TYPE; */
+
+ va_start(ap,flags);
+
+ switch ((rval = objtype)) {
+ case EI_INT: {
+ long *ip;
+
+ if (!(ip = va_arg(ap,long*))) rval = -1; /* EI_BADARG; */
+ else *ip = obj->val.i;
+ break;
+ }
+ case EI_FLT: {
+ double *fp;
+
+ if (!(fp = va_arg(ap,double*))) rval = -1; /* EI_BADARG; */
+ else *fp = obj->val.f;
+ break;
+ }
+ case EI_STR: {
+ char **sp;
+
+ if (!(sp = va_arg(ap,char**))) rval = -1; /* EI_BADARG; */
+ else *sp = obj->val.s;
+ break;
+ }
+ case EI_BIN: {
+ void **pp;
+ int *size;
+
+ if (!(pp = va_arg(ap,void**))) rval = -1; /* EI_BADARG; */
+ else *pp = obj->val.p;
+ if ((size=va_arg(ap,int*))) *size=obj->size;
+ break;
+ }
+ default:
+ /* can't (should never) happen */
+ rval = -1;
+ /* rval = EI_UNKNOWN; */
+ }
+
+ /* clean up & return */
+ va_end(ap);
+ return rval;
+}