tgt-fpga/mangle.c

   1 /*
   2  * Copyright (c) 2001 Stephen Williams (steve@icarus.com)
   3  *
   4  *    This source code is free software; you can redistribute it
   5  *    and/or modify it in source code form under the terms of the GNU
   6  *    General Public License as published by the Free Software
   7  *    Foundation; either version 2 of the License, or (at your option)
   8  *    any later version.
   9  *
  10  *    This program is distributed in the hope that it will be useful,
  11  *    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *    GNU General Public License for more details.
  14  *
  15  *    You should have received a copy of the GNU General Public License
  16  *    along with this program; if not, write to the Free Software
  17  *    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
  18  */
  19 #ifdef HAVE_CVS_IDENT
  20 #ident "$Id: mangle.c,v 1.6 2002/08/12 01:35:03 steve Exp $"
  21 #endif
  22
  23 # include  "fpga_priv.h"
  24 # include  <string.h>
  25 #ifdef HAVE_MALLOC_H
  26 # include  <malloc.h>
  27 #endif
  28 # include  <stdlib.h>
  29
  30 static size_t xnf_mangle_scope_name(ivl_scope_t net, char*buf, size_t nbuf)
  31 {
  32       unsigned cnt = 0;
  33       ivl_scope_t parent = ivl_scope_parent(net);
  34
  35       if (parent) {
  36             cnt = xnf_mangle_scope_name(parent, buf, nbuf);
  37             buf += cnt;
  38             nbuf -= cnt;
  39             *buf++ = '/';
  40             nbuf -= 1;
  41             cnt += 1;
  42       }
  43
  44       strcpy(buf, ivl_scope_basename(net));
  45       cnt += strlen(buf);
  46
  47       return cnt;
  48 }
  49
  50 void xnf_mangle_logic_name(ivl_net_logic_t net, char*buf, size_t nbuf)
  51 {
  52       size_t cnt = xnf_mangle_scope_name(ivl_logic_scope(net), buf, nbuf);
  53       buf[cnt++] = '/';
  54       strcpy(buf+cnt, ivl_logic_basename(net));
  55 }
  56
  57 void xnf_mangle_lpm_name(ivl_lpm_t net, char*buf, size_t nbuf)
  58 {
  59       size_t cnt = xnf_mangle_scope_name(ivl_lpm_scope(net), buf, nbuf);
  60       buf[cnt++] = '/';
  61       strcpy(buf+cnt, ivl_lpm_basename(net));
  62 }
  63
  64 /*
  65  * Nexus names are used in pin records to connect things together. It
  66  * almost doesn't matter what the nexus name is, but for readability
  67  * we choose a name that is close to the nexus name. This function
  68  * converts the existing name to a name that XNF can use.
  69  *
  70  * For speed, this function saves the calculated string into the real
  71  * nexus by using the private pointer. Every nexus is used at least
  72  * twice, so this cuts the mangling time in half at least.
  73  */
  74 const char* xnf_mangle_nexus_name(ivl_nexus_t net)
  75 {
  76       char*name = ivl_nexus_get_private(net);
  77       char*cp;
  78
  79       if (name != 0) {
  80             return name;
  81       }
  82
  83       name = malloc(strlen(ivl_nexus_name(net)) + 1);
  84       strcpy(name, ivl_nexus_name(net));
  85
  86       for (cp = name ;  *cp ;  cp += 1) switch (*cp) {
  87
  88           case '.':
  89             *cp = '/';
  90             break;
  91           default:
  92             break;
  93       }
  94
  95       ivl_nexus_set_private(net, name);
  96       return name;
  97 }
  98
  99 /*
 100  * $Log: mangle.c,v $
 101  * Revision 1.6  2002/08/12 01:35:03  steve
 102  *  conditional ident string using autoconfig.
 103  *
 104  * Revision 1.5  2002/08/11 23:47:04  steve
 105  *  Add missing Log and Ident strings.
 106  *
 107  * Revision 1.4  2001/09/15 18:27:04  steve
 108  *  Make configure detect malloc.h
 109  *
 110  * Revision 1.3  2001/09/02 21:33:07  steve
 111  *  Rearrange the XNF code generator to be generic-xnf
 112  *  so that non-XNF code generation is also possible.
 113  *
 114  *  Start into the virtex EDIF output driver.
 115  *
 116  * Revision 1.2  2001/08/30 04:31:05  steve
 117  *  Mangle nexus names.
 118  *
 119  * Revision 1.1  2001/08/28 04:14:20  steve
 120  *  Add the fpga target.
 121  *
 122  */
 123