[pcre-dev] Fwd: [Bug 1295] add 32-bit library

It's good that the masking with 0x1fffff now only occurs if PCRE_NO_UTF32_CHECK is specified. The Unicode conformance can be improved, and the code made slightly smaller, faster, and more flexible, with a simple change to pcre_internal.h. By default, PCRE_NO_UTF32_CHECK should disable checking without enabling masking. Masking can be enabled by a compile-time option. The definition of UTF32_MASK can be replaced by the following:

#if defined PCRE_MASK_UTF32_BEYOND_1FFFFF
#define ADJUST_UTF32_CODE_UNIT(c) ((c) & 0x1fffffu)
#else
#define ADJUST_UTF32_CODE_UNIT(c) (c)
#endif

and these macros can be revised as follows:

#define GETCHAR(c, eptr) \
c = ADJUST_UTF32_CODE_UNIT(*(eptr));

#define GETCHARTEST(c, eptr) \
c = *eptr; \
if (utf) c = ADJUST_UTF32_CODE_UNIT(c);

#define GETCHARINC(c, eptr) \
c = ADJUST_UTF32_CODE_UNIT(*eptr++);

#define GETCHARINCTEST(c, eptr) \
c = *eptr++; \
if (utf) c = ADJUST_UTF32_CODE_UNIT(c);

#define RAWUCHAR(eptr) \
ADJUST_UTF32_CODE_UNIT(*(eptr))

#define RAWUCHARINC(eptr) \
ADJUST_UTF32_CODE_UNIT(*(eptr)++)

#define RAWUCHARTEST(eptr) \
(utf ? (ADJUST_UTF32_CODE_UNIT(*(eptr))) : *(eptr))

#define RAWUCHARINCTEST(eptr) \
(utf ? (ADJUST_UTF32_CODE_UNIT(*(eptr)++)) : *(eptr)++)

Best wishes,

Tom

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