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Don't use GCC zero-length arrays.

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* libguile/frames.c, libguile/objcodes.c, libguile/programs.c,
  libguile/vm-engine.c, libguile/vm-i-system.c, libguile/vm.c: Use
  `SCM_C_OBJCODE_BASE ()' instead of accessing the `base' field of
  `struct scm_objcode'.

* libguile/objcodes.h (struct scm_objcode)[base]: Remove.
This commit is contained in:
Ludovic Courtès 2009-12-14 23:11:47 +01:00
parent cd169c5a22
commit 3dbbe28dfd
7 changed files with 36 additions and 20 deletions
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14
libguile/objcodes.h
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@ -21,14 +21,20 @@
#include <libguile.h>
/* objcode data should be directly mappable to this C structure. */
struct scm_objcode {
/* Objcode data should be directly mappable to this C structure. */
struct scm_objcode
{
scm_t_uint32 len; /* the maximum index of base[] */
scm_t_uint32 metalen; /* well, i lie. this many bytes at the end of
base[] for metadata */
scm_t_uint8 base[0];
/* In C99, we'd have:
scm_t_uint8 base[]; */
};
/* Return a pointer to the base of objcode OBJ. */
#define SCM_C_OBJCODE_BASE(obj) \
((scm_t_uint8 *)(obj) + sizeof (struct scm_objcode))
#define SCM_F_OBJCODE_IS_MMAP (1<<0)
#define SCM_F_OBJCODE_IS_U8VECTOR (1<<1)
#define SCM_F_OBJCODE_IS_SLICE (1<<2)
@ -42,7 +48,7 @@ SCM_API scm_t_bits scm_tc16_objcode;
#define SCM_OBJCODE_LEN(x) (SCM_OBJCODE_DATA (x)->len)
#define SCM_OBJCODE_META_LEN(x) (SCM_OBJCODE_DATA (x)->metalen)
#define SCM_OBJCODE_TOTAL_LEN(x) (SCM_OBJCODE_LEN (x) + SCM_OBJCODE_META_LEN (x))
#define SCM_OBJCODE_BASE(x) (SCM_OBJCODE_DATA (x)->base)
#define SCM_OBJCODE_BASE(x) (SCM_C_OBJCODE_BASE (SCM_OBJCODE_DATA (x)))
#define SCM_OBJCODE_IS_MMAP(x) (SCM_SMOB_FLAGS (x) & SCM_F_OBJCODE_IS_MMAP)
#define SCM_OBJCODE_IS_U8VECTOR(x) (SCM_SMOB_FLAGS (x) & SCM_F_OBJCODE_IS_U8VECTOR)