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+/* pcomplib.c - library functions for programmable completion. */
+
+/* Copyright (C) 1999-2020 Free Software Foundation, Inc.
+
+ This file is part of GNU Bash, the Bourne Again SHell.
+
+ Bash 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 3 of the License, or
+ (at your option) any later version.
+
+ Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include <config.h>
+
+#if defined (PROGRAMMABLE_COMPLETION)
+
+#include "bashansi.h"
+#include <stdio.h>
+
+#if defined (HAVE_UNISTD_H)
+# ifdef _MINIX
+# include <sys/types.h>
+# endif
+# include <unistd.h>
+#endif
+
+#include "bashintl.h"
+
+#include "shell.h"
+#include "pcomplete.h"
+
+#define COMPLETE_HASH_BUCKETS 256 /* must be power of two */
+
+#define STRDUP(x) ((x) ? savestring (x) : (char *)NULL)
+
+HASH_TABLE *prog_completes = (HASH_TABLE *)NULL;
+
+static void free_progcomp PARAMS((PTR_T));
+
+COMPSPEC *
+compspec_create ()
+{
+ COMPSPEC *ret;
+
+ ret = (COMPSPEC *)xmalloc (sizeof (COMPSPEC));
+ ret->refcount = 0;
+
+ ret->actions = (unsigned long)0;
+ ret->options = (unsigned long)0;
+
+ ret->globpat = (char *)NULL;
+ ret->words = (char *)NULL;
+ ret->prefix = (char *)NULL;
+ ret->suffix = (char *)NULL;
+ ret->funcname = (char *)NULL;
+ ret->command = (char *)NULL;
+ ret->lcommand = (char *)NULL;
+ ret->filterpat = (char *)NULL;
+
+ return ret;
+}
+
+void
+compspec_dispose (cs)
+ COMPSPEC *cs;
+{
+ cs->refcount--;
+ if (cs->refcount == 0)
+ {
+ FREE (cs->globpat);
+ FREE (cs->words);
+ FREE (cs->prefix);
+ FREE (cs->suffix);
+ FREE (cs->funcname);
+ FREE (cs->command);
+ FREE (cs->lcommand);
+ FREE (cs->filterpat);
+
+ free (cs);
+ }
+}
+
+COMPSPEC *
+compspec_copy (cs)
+ COMPSPEC *cs;
+{
+ COMPSPEC *new;
+
+ new = (COMPSPEC *)xmalloc (sizeof (COMPSPEC));
+
+ new->refcount = 1; /* was cs->refcount, but this is a fresh copy */
+ new->actions = cs->actions;
+ new->options = cs->options;
+
+ new->globpat = STRDUP (cs->globpat);
+ new->words = STRDUP (cs->words);
+ new->prefix = STRDUP (cs->prefix);
+ new->suffix = STRDUP (cs->suffix);
+ new->funcname = STRDUP (cs->funcname);
+ new->command = STRDUP (cs->command);
+ new->lcommand = STRDUP (cs->lcommand);
+ new->filterpat = STRDUP (cs->filterpat);
+
+ return new;
+}
+
+void
+progcomp_create ()
+{
+ if (prog_completes == 0)
+ prog_completes = hash_create (COMPLETE_HASH_BUCKETS);
+}
+
+int
+progcomp_size ()
+{
+ return (HASH_ENTRIES (prog_completes));
+}
+
+static void
+free_progcomp (data)
+ PTR_T data;
+{
+ COMPSPEC *cs;
+
+ cs = (COMPSPEC *)data;
+ compspec_dispose (cs);
+}
+
+void
+progcomp_flush ()
+{
+ if (prog_completes)
+ hash_flush (prog_completes, free_progcomp);
+}
+
+void
+progcomp_dispose ()
+{
+ if (prog_completes)
+ hash_dispose (prog_completes);
+ prog_completes = (HASH_TABLE *)NULL;
+}
+
+int
+progcomp_remove (cmd)
+ char *cmd;
+{
+ register BUCKET_CONTENTS *item;
+
+ if (prog_completes == 0)
+ return 1;
+
+ item = hash_remove (cmd, prog_completes, 0);
+ if (item)
+ {
+ if (item->data)
+ free_progcomp (item->data);
+ free (item->key);
+ free (item);
+ return (1);
+ }
+ return (0);
+}
+
+int
+progcomp_insert (cmd, cs)
+ char *cmd;
+ COMPSPEC *cs;
+{
+ register BUCKET_CONTENTS *item;
+
+ if (cs == NULL)
+ programming_error (_("progcomp_insert: %s: NULL COMPSPEC"), cmd);
+
+ if (prog_completes == 0)
+ progcomp_create ();
+
+ cs->refcount++;
+ item = hash_insert (cmd, prog_completes, 0);
+ if (item->data)
+ free_progcomp (item->data);
+ else
+ item->key = savestring (cmd);
+ item->data = cs;
+
+ return 1;
+}
+
+COMPSPEC *
+progcomp_search (cmd)
+ const char *cmd;
+{
+ register BUCKET_CONTENTS *item;
+ COMPSPEC *cs;
+
+ if (prog_completes == 0)
+ return ((COMPSPEC *)NULL);
+
+ item = hash_search (cmd, prog_completes, 0);
+
+ if (item == NULL)
+ return ((COMPSPEC *)NULL);
+
+ cs = (COMPSPEC *)item->data;
+
+ return (cs);
+}
+
+void
+progcomp_walk (pfunc)
+ hash_wfunc *pfunc;
+{
+ if (prog_completes == 0 || pfunc == 0 || HASH_ENTRIES (prog_completes) == 0)
+ return;
+
+ hash_walk (prog_completes, pfunc);
+}
+
+#endif /* PROGRAMMABLE_COMPLETION */