pcomplib.c

   1 /* pcomplib.c - library functions for programmable completion. */
   2
   3 /* Copyright (C) 1999-2002 Free Software Foundation, Inc.
   4
   5    This file is part of GNU Bash, the Bourne Again SHell.
   6
   7    Bash is free software; you can redistribute it and/or modify it under
   8    the terms of the GNU General Public License as published by the Free
   9    Software Foundation; either version 2, or (at your option) any later
  10    version.
  11
  12    Bash is distributed in the hope that it will be useful, but WITHOUT ANY
  13    WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15    for more details.
  16
  17    You should have received a copy of the GNU General Public License along
  18    with Bash; see the file COPYING.  If not, write to the Free Software
  19    Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
  20
  21 #include <config.h>
  22
  23 #if defined (PROGRAMMABLE_COMPLETION)
  24
  25 #include "bashansi.h"
  26 #include <stdio.h>
  27
  28 #if defined (HAVE_UNISTD_H)
  29 #  ifdef _MINIX
  30 #    include <sys/types.h>
  31 #  endif
  32 #  include <unistd.h>
  33 #endif
  34
  35 #include "bashintl.h"
  36
  37 #include "shell.h"
  38 #include "pcomplete.h"
  39
  40 #define COMPLETE_HASH_BUCKETS   32      /* must be power of two */
  41
  42 #define STRDUP(x)       ((x) ? savestring (x) : (char *)NULL)
  43
  44 HASH_TABLE *prog_completes = (HASH_TABLE *)NULL;
  45
  46 static void free_progcomp __P((PTR_T));
  47
  48 COMPSPEC *
  49 compspec_create ()
  50 {
  51   COMPSPEC *ret;
  52
  53   ret = (COMPSPEC *)xmalloc (sizeof (COMPSPEC));
  54   ret->refcount = 0;
  55
  56   ret->actions = (unsigned long)0;
  57   ret->options = (unsigned long)0;
  58
  59   ret->globpat = (char *)NULL;
  60   ret->words = (char *)NULL;
  61   ret->prefix = (char *)NULL;
  62   ret->suffix = (char *)NULL;
  63   ret->funcname = (char *)NULL;
  64   ret->command = (char *)NULL;
  65   ret->filterpat = (char *)NULL;
  66
  67   return ret;
  68 }
  69
  70 void
  71 compspec_dispose (cs)
  72      COMPSPEC *cs;
  73 {
  74   cs->refcount--;
  75   if (cs->refcount == 0)
  76     {
  77       FREE (cs->globpat);
  78       FREE (cs->words);
  79       FREE (cs->prefix);
  80       FREE (cs->suffix);
  81       FREE (cs->funcname);
  82       FREE (cs->command);
  83       FREE (cs->filterpat);
  84
  85       free (cs);
  86     }
  87 }
  88
  89 COMPSPEC *
  90 compspec_copy (cs)
  91      COMPSPEC *cs;
  92 {
  93   COMPSPEC *new;
  94
  95   new = (COMPSPEC *)xmalloc (sizeof (COMPSPEC));
  96
  97   new->refcount = cs->refcount;
  98   new->actions = cs->actions;
  99   new->options = cs->options;
 100
 101   new->globpat = STRDUP (cs->globpat);
 102   new->words = STRDUP (cs->words);
 103   new->prefix = STRDUP (cs->prefix);
 104   new->suffix = STRDUP (cs->suffix);
 105   new->funcname = STRDUP (cs->funcname);
 106   new->command = STRDUP (cs->command);
 107   new->filterpat = STRDUP (cs->filterpat);
 108
 109   return new;
 110 }
 111
 112 void
 113 progcomp_create ()
 114 {
 115   if (prog_completes == 0)
 116     prog_completes = hash_create (COMPLETE_HASH_BUCKETS);
 117 }
 118
 119 int
 120 progcomp_size ()
 121 {
 122   return (HASH_ENTRIES (prog_completes));
 123 }
 124
 125 static void
 126 free_progcomp (data)
 127      PTR_T data;
 128 {
 129   COMPSPEC *cs;
 130
 131   cs = (COMPSPEC *)data;
 132   compspec_dispose (cs);
 133 }
 134
 135 void
 136 progcomp_flush ()
 137 {
 138   if (prog_completes)
 139     hash_flush (prog_completes, free_progcomp);
 140 }
 141
 142 void
 143 progcomp_dispose ()
 144 {
 145   if (prog_completes)
 146     hash_dispose (prog_completes);
 147   prog_completes = (HASH_TABLE *)NULL;
 148 }
 149
 150 int
 151 progcomp_remove (cmd)
 152      char *cmd;
 153 {
 154   register BUCKET_CONTENTS *item;
 155
 156   if (prog_completes == 0)
 157     return 1;
 158
 159   item = hash_remove (cmd, prog_completes, 0);
 160   if (item)
 161     {
 162       if (item->data)
 163         free_progcomp (item->data);
 164       free (item->key);
 165       free (item);
 166       return (1);
 167     }
 168   return (0);
 169 }
 170
 171 int
 172 progcomp_insert (cmd, cs)
 173       char *cmd;
 174       COMPSPEC *cs;
 175 {
 176   register BUCKET_CONTENTS *item;
 177
 178   if (cs == NULL)
 179     programming_error (_("progcomp_insert: %s: NULL COMPSPEC"), cmd);
 180
 181   if (prog_completes == 0)
 182     progcomp_create ();
 183
 184   cs->refcount++;
 185   item = hash_insert (cmd, prog_completes, 0);
 186   if (item->data)
 187     free_progcomp (item->data);
 188   else
 189     item->key = savestring (cmd);
 190   item->data = cs;
 191
 192   return 1;
 193 }
 194
 195 COMPSPEC *
 196 progcomp_search (cmd)
 197      const char *cmd;
 198 {
 199   register BUCKET_CONTENTS *item;
 200   COMPSPEC *cs;
 201
 202   if (prog_completes == 0)
 203     return ((COMPSPEC *)NULL);
 204
 205   item = hash_search (cmd, prog_completes, 0);
 206
 207   if (item == NULL)
 208     return ((COMPSPEC *)NULL);
 209
 210   cs = (COMPSPEC *)item->data;
 211
 212   return (cs);
 213 }
 214
 215 void
 216 progcomp_walk (pfunc)
 217      hash_wfunc *pfunc;
 218 {
 219   if (prog_completes == 0 || pfunc == 0 || HASH_ENTRIES (prog_completes) == 0)
 220     return;
 221
 222   hash_walk (prog_completes, pfunc);
 223 }
 224
 225 #endif /* PROGRAMMABLE_COMPLETION */