doc: merge HACKING and README-hacking.

[bison.git] / lib / vbitset.c

diff --git a/lib/vbitset.c b/lib/vbitset.c
index 609aca31c743037fc43897ba72c544eba2241010..802fdae4866bc0624f75a726527303b054c3e3e4 100644 (file)
--- a/lib/vbitset.c
+++ b/lib/vbitset.c
@@ -1,10 +1,10 @@
 /* Variable array bitsets.
-   Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
    Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
 
-   This program is free software; you can redistribute it and/or modify
+   This program 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 2 of the License, or
+   the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -13,44 +13,40 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 
-*/
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+#include <config.h>
 
 #include "vbitset.h"
+
 #include <stdlib.h>
 #include <string.h>
 
 /* This file implements variable size bitsets stored as a variable
    length array of words.  Any unused bits in the last word must be
-   zero.  
+   zero.
 
    Note that binary or ternary operations assume that each bitset operand
    has the same size.
 */
 
-static void vbitset_unused_clear PARAMS ((bitset));
+static void vbitset_unused_clear (bitset);
 
-static void vbitset_set PARAMS ((bitset, bitset_bindex));
-static void vbitset_reset PARAMS ((bitset, bitset_bindex));
-static bool vbitset_test PARAMS ((bitset, bitset_bindex));
-static bitset_bindex vbitset_list PARAMS ((bitset, bitset_bindex *, 
-                                          bitset_bindex,
-                                          bitset_bindex *));
-static bitset_bindex vbitset_list_reverse PARAMS ((bitset, bitset_bindex *,
-                                                  bitset_bindex,
-                                                  bitset_bindex *));
+static void vbitset_set (bitset, bitset_bindex);
+static void vbitset_reset (bitset, bitset_bindex);
+static bool vbitset_test (bitset, bitset_bindex);
+static bitset_bindex vbitset_list (bitset, bitset_bindex *,
+                                  bitset_bindex, bitset_bindex *);
+static bitset_bindex vbitset_list_reverse (bitset, bitset_bindex *,
+                                          bitset_bindex, bitset_bindex *);
 
 #define VBITSET_N_WORDS(N) (((N) + BITSET_WORD_BITS - 1) / BITSET_WORD_BITS)
 #define VBITSET_WORDS(X) ((X)->b.cdata)
 #define VBITSET_SIZE(X) ((X)->b.csize)
 #define VBITSET_ASIZE(X) ((X)->v.size)
 
-
+#undef min
+#undef max
 #define min(a, b) ((a) > (b) ? (b) : (a))
 #define max(a, b) ((a) > (b) ? (a) : (b))
 
@@ -70,7 +66,7 @@ vbitset_resize (bitset src, bitset_bindex n_bits)
     {
       bitset_windex size;
 
-      /* The bitset needs to grow.  If we already have enough memory 
+      /* The bitset needs to grow.  If we already have enough memory
         allocated, then just zero what we need.  */
       if (newsize > VBITSET_ASIZE (src))
        {
@@ -83,13 +79,13 @@ vbitset_resize (bitset src, bitset_bindex n_bits)
            size = newsize;
          else
            size = newsize + newsize / 4;
-         
+
          VBITSET_WORDS (src)
            = realloc (VBITSET_WORDS (src), size * sizeof (bitset_word));
          VBITSET_ASIZE (src) = size;
        }
 
-      memset (VBITSET_WORDS (src) + oldsize, 0, 
+      memset (VBITSET_WORDS (src) + oldsize, 0,
              (newsize - oldsize) * sizeof (bitset_word));
       VBITSET_SIZE (src) = newsize;
     }
@@ -428,7 +424,7 @@ vbitset_not (bitset dst, bitset src)
          sizeof (bitset_word) * (dsize - ssize));
 }
 
- 
+
 static bool
 vbitset_equal_p (bitset dst, bitset src)
 {
@@ -467,7 +463,7 @@ vbitset_subset_p (bitset dst, bitset src)
   bitset_word *dstp = VBITSET_WORDS (dst);
   bitset_windex ssize = VBITSET_SIZE (src);
   bitset_windex dsize = VBITSET_SIZE (dst);
-  
+
   for (i = 0; i < min (ssize, dsize); i++, dstp++, srcp++)
       if (*dstp != (*srcp | *dstp))
          return 0;
@@ -522,7 +518,7 @@ vbitset_and (bitset dst, bitset src1, bitset src2)
 
   for (i = 0; i < min (ssize1, ssize2); i++)
       *dstp++ = *src1p++ & *src2p++;
-  
+
   memset (dstp, 0, sizeof (bitset_word) * (dsize - min (ssize1, ssize2)));
 }
 
@@ -551,14 +547,14 @@ vbitset_and_cmp (bitset dst, bitset src1, bitset src2)
   for (i = 0; i < min (ssize1, ssize2); i++, dstp++)
     {
       bitset_word tmp = *src1p++ & *src2p++;
-      
+
       if (*dstp != tmp)
        {
          changed = 1;
          *dstp = tmp;
        }
     }
-  
+
   if (ssize2 > ssize1)
     {
       src1p = src2p;
@@ -602,7 +598,7 @@ vbitset_andn (bitset dst, bitset src1, bitset src2)
 
   for (i = 0; i < min (ssize1, ssize2); i++)
       *dstp++ = *src1p++ & ~(*src2p++);
-  
+
   if (ssize2 > ssize1)
     {
       for (; i < ssize2; i++)
@@ -644,14 +640,14 @@ vbitset_andn_cmp (bitset dst, bitset src1, bitset src2)
   for (i = 0; i < min (ssize1, ssize2); i++, dstp++)
     {
       bitset_word tmp = *src1p++ & ~(*src2p++);
-      
+
       if (*dstp != tmp)
        {
          changed = 1;
          *dstp = tmp;
        }
     }
-  
+
   if (ssize2 > ssize1)
     {
       for (; i < ssize2; i++, dstp++)
@@ -670,7 +666,7 @@ vbitset_andn_cmp (bitset dst, bitset src1, bitset src2)
       for (; i < ssize1; i++, dstp++)
        {
          bitset_word tmp = *src1p++;
-         
+
          if (*dstp != tmp)
            {
              changed = 1;
@@ -707,7 +703,7 @@ vbitset_or (bitset dst, bitset src1, bitset src2)
 
   for (i = 0; i < min (ssize1, ssize2); i++)
       *dstp++ = *src1p++ | *src2p++;
-  
+
   if (ssize2 > ssize1)
     {
       src1p = src2p;
@@ -745,14 +741,14 @@ vbitset_or_cmp (bitset dst, bitset src1, bitset src2)
   for (i = 0; i < min (ssize1, ssize2); i++, dstp++)
     {
       bitset_word tmp = *src1p++ | *src2p++;
-      
+
       if (*dstp != tmp)
        {
          changed = 1;
          *dstp = tmp;
        }
     }
-  
+
   if (ssize2 > ssize1)
     {
       src1p = src2p;
@@ -762,7 +758,7 @@ vbitset_or_cmp (bitset dst, bitset src1, bitset src2)
   for (; i < ssize1; i++, dstp++)
     {
       bitset_word tmp = *src1p++;
-      
+
       if (*dstp != tmp)
        {
          changed = 1;
@@ -798,7 +794,7 @@ vbitset_xor (bitset dst, bitset src1, bitset src2)
 
   for (i = 0; i < min (ssize1, ssize2); i++)
       *dstp++ = *src1p++ ^ *src2p++;
-  
+
   if (ssize2 > ssize1)
     {
       src1p = src2p;
@@ -836,14 +832,14 @@ vbitset_xor_cmp (bitset dst, bitset src1, bitset src2)
   for (i = 0; i < min (ssize1, ssize2); i++, dstp++)
     {
       bitset_word tmp = *src1p++ ^ *src2p++;
-      
+
       if (*dstp != tmp)
        {
          changed = 1;
          *dstp = tmp;
        }
     }
-  
+
   if (ssize2 > ssize1)
     {
       src1p = src2p;
@@ -853,7 +849,7 @@ vbitset_xor_cmp (bitset dst, bitset src1, bitset src2)
   for (; i < ssize1; i++, dstp++)
     {
       bitset_word tmp = *src1p++;
-      
+
       if (*dstp != tmp)
        {
          changed = 1;
@@ -879,7 +875,7 @@ vbitset_and_or (bitset dst, bitset src1, bitset src2, bitset src3)
   bitset_word *src3p;
   bitset_word *dstp;
   bitset_windex size;
-  
+
   if (BITSET_NBITS_ (src1) != BITSET_NBITS_ (src2)
       || BITSET_NBITS_ (src1) != BITSET_NBITS_ (src3))
     {
@@ -910,7 +906,7 @@ vbitset_and_or_cmp (bitset dst, bitset src1, bitset src2, bitset src3)
   bitset_word *src3p;
   bitset_word *dstp;
   bitset_windex size;
-  
+
   if (BITSET_NBITS_ (src1) != BITSET_NBITS_ (src2)
       || BITSET_NBITS_ (src1) != BITSET_NBITS_ (src3))
     return bitset_and_or_cmp_ (dst, src1, src2, src3);
@@ -922,11 +918,11 @@ vbitset_and_or_cmp (bitset dst, bitset src1, bitset src2, bitset src3)
   src3p = VBITSET_WORDS (src3);
   dstp = VBITSET_WORDS (dst);
   size = VBITSET_SIZE (dst);
-  
+
   for (i = 0; i < size; i++, dstp++)
     {
       bitset_word tmp = (*src1p++ & *src2p++) | *src3p++;
-      
+
       if (*dstp != tmp)
        {
          changed = 1;
@@ -946,7 +942,7 @@ vbitset_andn_or (bitset dst, bitset src1, bitset src2, bitset src3)
   bitset_word *src3p;
   bitset_word *dstp;
   bitset_windex size;
-  
+
   if (BITSET_NBITS_ (src1) != BITSET_NBITS_ (src2)
       || BITSET_NBITS_ (src1) != BITSET_NBITS_ (src3))
     {
@@ -977,7 +973,7 @@ vbitset_andn_or_cmp (bitset dst, bitset src1, bitset src2, bitset src3)
   bitset_word *src3p;
   bitset_word *dstp;
   bitset_windex size;
-  
+
   if (BITSET_NBITS_ (src1) != BITSET_NBITS_ (src2)
       || BITSET_NBITS_ (src1) != BITSET_NBITS_ (src3))
     return bitset_andn_or_cmp_ (dst, src1, src2, src3);
@@ -989,11 +985,11 @@ vbitset_andn_or_cmp (bitset dst, bitset src1, bitset src2, bitset src3)
   src3p = VBITSET_WORDS (src3);
   dstp = VBITSET_WORDS (dst);
   size = VBITSET_SIZE (dst);
-  
+
   for (i = 0; i < size; i++, dstp++)
     {
       bitset_word tmp = (*src1p++ & ~(*src2p++)) | *src3p++;
-      
+
       if (*dstp != tmp)
        {
          changed = 1;
@@ -1013,7 +1009,7 @@ vbitset_or_and (bitset dst, bitset src1, bitset src2, bitset src3)
   bitset_word *src3p;
   bitset_word *dstp;
   bitset_windex size;
-  
+
   if (BITSET_NBITS_ (src1) != BITSET_NBITS_ (src2)
       || BITSET_NBITS_ (src1) != BITSET_NBITS_ (src3))
     {
@@ -1028,7 +1024,7 @@ vbitset_or_and (bitset dst, bitset src1, bitset src2, bitset src3)
   src3p = VBITSET_WORDS (src3);
   dstp = VBITSET_WORDS (dst);
   size = VBITSET_SIZE (dst);
-  
+
   for (i = 0; i < size; i++)
       *dstp++ = (*src1p++ | *src2p++) & *src3p++;
 }
@@ -1044,7 +1040,7 @@ vbitset_or_and_cmp (bitset dst, bitset src1, bitset src2, bitset src3)
   bitset_word *src3p;
   bitset_word *dstp;
   bitset_windex size;
-  
+
   if (BITSET_NBITS_ (src1) != BITSET_NBITS_ (src2)
       || BITSET_NBITS_ (src1) != BITSET_NBITS_ (src3))
     return bitset_or_and_cmp_ (dst, src1, src2, src3);
@@ -1056,11 +1052,11 @@ vbitset_or_and_cmp (bitset dst, bitset src1, bitset src2, bitset src3)
   src3p = VBITSET_WORDS (src3);
   dstp = VBITSET_WORDS (dst);
   size = VBITSET_SIZE (dst);
-  
+
   for (i = 0; i < size; i++, dstp++)
     {
       bitset_word tmp = (*src1p++ | *src2p++) & *src3p++;
-      
+
       if (*dstp != tmp)
        {
          changed = 1;
@@ -1071,7 +1067,7 @@ vbitset_or_and_cmp (bitset dst, bitset src1, bitset src2, bitset src3)
 }
 
 
-void
+static void
 vbitset_copy (bitset dst, bitset src)
 {
   if (BITSET_COMPATIBLE_ (dst, src))