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authorGreg McGary <greg@mcgary.org>2000-07-07 07:53:40 +0000
committerGreg McGary <greg@mcgary.org>2000-07-07 07:53:40 +0000
commit8ccd2cb1910a239087f41dd1e90c89e675232239 (patch)
treebd6f98c237d74a16822412fc2e53d273655c86dd /posix
parent89a4f6ff1f643aadc4d3e9e401d792b5198d9f52 (diff)
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* posix/regex.c (EXTEND_BUFFER): Compute increment once.
Move all three components of a bounded pointer. 2000-07-07 Greg McGary <greg@mcgary.org> * posix/regex.c (EXTEND_BUFFER): Compute increment once. Move all three components of a bounded pointer.
Diffstat (limited to 'posix')
-rw-r--r--posix/regex.c29
1 files changed, 18 insertions, 11 deletions
diff --git a/posix/regex.c b/posix/regex.c
index 0af5283505..c9476be532 100644
--- a/posix/regex.c
+++ b/posix/regex.c
@@ -1747,28 +1747,35 @@ static reg_errcode_t compile_range _RE_ARGS ((unsigned int range_start,
reset the pointers that pointed into the old block to point to the
correct places in the new one. If extending the buffer results in it
being larger than MAX_BUF_SIZE, then flag memory exhausted. */
+#if __BOUNDED_POINTERS__
+# define MOVE_BUFFER_POINTER(P) \
+ (__ptrlow (P) += incr, __ptrhigh (P) += incr, __ptrvalue (P) += incr)
+#else
+# define MOVE_BUFFER_POINTER(P) (P) += incr
+#endif
#define EXTEND_BUFFER() \
- do { \
+ do { \
unsigned char *old_buffer = bufp->buffer; \
- if (bufp->allocated == MAX_BUF_SIZE) \
+ if (bufp->allocated == MAX_BUF_SIZE) \
return REG_ESIZE; \
bufp->allocated <<= 1; \
if (bufp->allocated > MAX_BUF_SIZE) \
- bufp->allocated = MAX_BUF_SIZE; \
+ bufp->allocated = MAX_BUF_SIZE; \
bufp->buffer = (unsigned char *) REALLOC (bufp->buffer, bufp->allocated);\
if (bufp->buffer == NULL) \
return REG_ESPACE; \
/* If the buffer moved, move all the pointers into it. */ \
if (old_buffer != bufp->buffer) \
{ \
- b = (b - old_buffer) + bufp->buffer; \
- begalt = (begalt - old_buffer) + bufp->buffer; \
- if (fixup_alt_jump) \
- fixup_alt_jump = (fixup_alt_jump - old_buffer) + bufp->buffer;\
- if (laststart) \
- laststart = (laststart - old_buffer) + bufp->buffer; \
- if (pending_exact) \
- pending_exact = (pending_exact - old_buffer) + bufp->buffer; \
+ int incr = bufp->buffer - old_buffer; \
+ MOVE_BUFFER_POINTER (b); \
+ MOVE_BUFFER_POINTER (begalt); \
+ if (fixup_alt_jump) \
+ MOVE_BUFFER_POINTER (fixup_alt_jump); \
+ if (laststart) \
+ MOVE_BUFFER_POINTER (laststart); \
+ if (pending_exact) \
+ MOVE_BUFFER_POINTER (pending_exact); \
} \
} while (0)