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authorIgor Pashev <pashev.igor@gmail.com>2012-06-24 22:28:35 +0000
committerIgor Pashev <pashev.igor@gmail.com>2012-06-24 22:28:35 +0000
commit3950ffe2a485479f6561c27364d3d7df5a21d124 (patch)
tree468c6e14449d1b1e279222ec32f676b0311917d2 /src/lib/libast/cdt/dtdisc.c
downloadksh-upstream.tar.gz
Imported Upstream version 93u+upstream
Diffstat (limited to 'src/lib/libast/cdt/dtdisc.c')
-rw-r--r--src/lib/libast/cdt/dtdisc.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/src/lib/libast/cdt/dtdisc.c b/src/lib/libast/cdt/dtdisc.c
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+++ b/src/lib/libast/cdt/dtdisc.c
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+/***********************************************************************
+* *
+* This software is part of the ast package *
+* Copyright (c) 1985-2011 AT&T Intellectual Property *
+* and is licensed under the *
+* Eclipse Public License, Version 1.0 *
+* by AT&T Intellectual Property *
+* *
+* A copy of the License is available at *
+* http://www.eclipse.org/org/documents/epl-v10.html *
+* (with md5 checksum b35adb5213ca9657e911e9befb180842) *
+* *
+* Information and Software Systems Research *
+* AT&T Research *
+* Florham Park NJ *
+* *
+* Glenn Fowler <gsf@research.att.com> *
+* David Korn <dgk@research.att.com> *
+* Phong Vo <kpv@research.att.com> *
+* *
+***********************************************************************/
+#include "dthdr.h"
+
+/* Change discipline.
+** dt : dictionary
+** disc : discipline
+**
+** Written by Kiem-Phong Vo (5/26/96)
+*/
+
+#if __STD_C
+static Void_t* dtmemory(Dt_t* dt, Void_t* addr, size_t size, Dtdisc_t* disc)
+#else
+static Void_t* dtmemory(dt, addr, size, disc)
+Dt_t* dt; /* dictionary */
+Void_t* addr; /* address to be manipulate */
+size_t size; /* size to obtain */
+Dtdisc_t* disc; /* discipline */
+#endif
+{
+ if(addr)
+ { if(size == 0)
+ { free(addr);
+ return NIL(Void_t*);
+ }
+ else return realloc(addr,size);
+ }
+ else return size > 0 ? malloc(size) : NIL(Void_t*);
+}
+
+#if __STD_C
+Dtdisc_t* dtdisc(Dt_t* dt, Dtdisc_t* disc, int type)
+#else
+Dtdisc_t* dtdisc(dt,disc,type)
+Dt_t* dt;
+Dtdisc_t* disc;
+int type;
+#endif
+{
+ Dtsearch_f searchf;
+ Dtdisc_t *old;
+ Dtlink_t *list;
+
+ if(!(old = dt->disc) ) /* initialization call from dtopen() */
+ { dt->disc = disc;
+ if(!(dt->memoryf = disc->memoryf) )
+ dt->memoryf = dtmemory;
+ return disc;
+ }
+
+ if(!disc) /* only want to know current discipline */
+ return old;
+
+ searchf = dt->meth->searchf;
+
+ if(old->eventf && (*old->eventf)(dt,DT_DISC,(Void_t*)disc,old) < 0)
+ return NIL(Dtdisc_t*);
+
+ if((type & (DT_SAMEHASH|DT_SAMECMP)) != (DT_SAMEHASH|DT_SAMECMP) )
+ list = dtextract(dt); /* grab the list of objects if any */
+ else list = NIL(Dtlink_t*);
+
+ dt->disc = disc;
+ if(!(dt->memoryf = disc->memoryf) )
+ dt->memoryf = dtmemory;
+
+ if(list ) /* reinsert extracted objects (with new discipline) */
+ dtrestore(dt, list);
+
+ return old;
+}