Merge remote-tracking branch 'origin/maint'

[bison.git] / src / Sbitset.h

diff --git a/src/Sbitset.h b/src/Sbitset.h
index a025040474f177137d374bb7fae1c7a22d16de97..4a32402eae5941422ec71f8986072cc71cb33b45 100644 (file)
--- a/src/Sbitset.h
+++ b/src/Sbitset.h
@@ -1,6 +1,6 @@
 /* A simple, memory-efficient bitset implementation.
 
 /* A simple, memory-efficient bitset implementation.
 

-   Copyright (C) 2009 Free Software Foundation, Inc.
+   Copyright (C) 2009-2012 Free Software Foundation, Inc.

 
    This file is part of Bison, the GNU Compiler Compiler.
 
 
    This file is part of Bison, the GNU Compiler Compiler.
 


@@ -20,14 +20,18 @@
 #ifndef SBITSET_H_
 # define SBITSET_H_
 
 #ifndef SBITSET_H_
 # define SBITSET_H_
 

-typedef char *Sbitset;
+typedef unsigned char *Sbitset;

 typedef size_t Sbitset__Index;
 #define SBITSET__INDEX__CONVERSION_SPEC "zu"
 
 typedef size_t Sbitset__Index;
 #define SBITSET__INDEX__CONVERSION_SPEC "zu"
 

-#define Sbitset__nbytes(NBITS)            (((NBITS)+7)/8)
-#define Sbitset__byteAddress(SELF, INDEX) (((SELF) + (INDEX)/8))
-#define Sbitset__bit_mask(INDEX)          (0x1 << (7 - (INDEX)%8))
-#define Sbitset__last_byte_mask(NBITS)    (0xff << (7 - ((NBITS)-1)%8))
+#define Sbitset__nbytes(NBITS) \
+  (((NBITS) + CHAR_BIT - 1) / CHAR_BIT)
+#define Sbitset__byteAddress(SELF, INDEX) \
+  (((SELF) + (INDEX) / CHAR_BIT))
+#define Sbitset__bit_mask(INDEX) \
+  (1 << (CHAR_BIT - 1 - (INDEX) % CHAR_BIT))
+#define Sbitset__last_byte_mask(NBITS) \
+  (UCHAR_MAX << (CHAR_BIT - 1 - ((NBITS) - 1) % CHAR_BIT))

 
 /* nbits must not be 0.  */
 Sbitset Sbitset__new (Sbitset__Index nbits);
 
 /* nbits must not be 0.  */
 Sbitset Sbitset__new (Sbitset__Index nbits);


@@ -63,16 +67,16 @@ do {                                                                          \
 /* NBITS is the size of the bitset.  More than NBITS bits might be set.  */
 #define Sbitset__ones(SELF, NBITS)                                            \
 do {                                                                          \
 /* NBITS is the size of the bitset.  More than NBITS bits might be set.  */
 #define Sbitset__ones(SELF, NBITS)                                            \
 do {                                                                          \

-  memset (SELF, 0xff, Sbitset__nbytes (NBITS));                               \
+  memset (SELF, UCHAR_MAX, Sbitset__nbytes (NBITS));                          \

 } while(0)
 
 /* NBITS is the size of every bitset.  More than NBITS bits might be set.  */
 #define Sbitset__or(SELF, OTHER1, OTHER2, NBITS)                              \
 do {                                                                          \
 } while(0)
 
 /* NBITS is the size of every bitset.  More than NBITS bits might be set.  */
 #define Sbitset__or(SELF, OTHER1, OTHER2, NBITS)                              \
 do {                                                                          \

-  char *ptr_self = (SELF);                                                    \
-  char *ptr_other1 = (OTHER1);                                                \
-  char *ptr_other2 = (OTHER2);                                                \
-  char *end_self = ptr_self + Sbitset__nbytes (NBITS);                        \
+  Sbitset ptr_self = (SELF);                                                  \
+  Sbitset ptr_other1 = (OTHER1);                                              \
+  Sbitset ptr_other2 = (OTHER2);                                              \
+  Sbitset end_self = ptr_self + Sbitset__nbytes (NBITS);                      \

   for (; ptr_self < end_self; ++ptr_self, ++ptr_other1, ++ptr_other2)         \
     *ptr_self = *ptr_other1 | *ptr_other2;                                    \
 } while(0)
   for (; ptr_self < end_self; ++ptr_self, ++ptr_other1, ++ptr_other2)         \
     *ptr_self = *ptr_other1 | *ptr_other2;                                    \
 } while(0)


@@ -80,8 +84,8 @@ do {                                                                          \
 #define SBITSET__FOR_EACH(SELF, NBITS, ITER, INDEX)                           \
   for ((ITER) = (SELF); (ITER) < (SELF) + Sbitset__nbytes (NBITS); ++(ITER))  \
     if (*(ITER) != 0)                                                         \
 #define SBITSET__FOR_EACH(SELF, NBITS, ITER, INDEX)                           \
   for ((ITER) = (SELF); (ITER) < (SELF) + Sbitset__nbytes (NBITS); ++(ITER))  \
     if (*(ITER) != 0)                                                         \

-      for ((INDEX) = ((ITER)-(SELF))*8;                                       \
-           (INDEX) < (NBITS) && (SELF)+(INDEX)/8 < (ITER)+1;                  \
+      for ((INDEX) = ((ITER)-(SELF))*CHAR_BIT;                                \
+           (INDEX) < (NBITS) && (SELF)+(INDEX)/CHAR_BIT < (ITER)+1;           \

            ++(INDEX))                                                         \
         if (((*ITER) & Sbitset__bit_mask (INDEX)) != 0)
 
            ++(INDEX))                                                         \
         if (((*ITER) & Sbitset__bit_mask (INDEX)) != 0)