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Diffstat (limited to 'src/include/regex/regcustom.h')
| -rw-r--r-- | src/include/regex/regcustom.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/include/regex/regcustom.h b/src/include/regex/regcustom.h index 3f1d14e1908..60034daee83 100644 --- a/src/include/regex/regcustom.h +++ b/src/include/regex/regcustom.h @@ -68,6 +68,17 @@ typedef int celt; /* type to hold chr, or NOCELT */ #define CHR_MAX 0x7ffffffe /* CHR_MAX-CHR_MIN+1 must fit in an int, and * CHR_MAX+1 must fit in both chr and celt */ +/* + * Check if a chr value is in range. Ideally we'd just write this as + * ((c) >= CHR_MIN && (c) <= CHR_MAX) + * However, if chr is unsigned and CHR_MIN is zero, the first part of that + * is a no-op, and certain overly-nannyish compilers give warnings about it. + * So we leave that out here. If you want to make chr signed and/or CHR_MIN + * not zero, redefine this macro as above. Callers should assume that the + * macro may multiply evaluate its argument, even though it does not today. + */ +#define CHR_IS_IN_RANGE(c) ((c) <= CHR_MAX) + /* functions operating on chr */ #define iscalnum(x) pg_wc_isalnum(x) #define iscalpha(x) pg_wc_isalpha(x) |