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| author | Karl Williamson <khw@cpan.org> | 2014-08-23 18:07:50 -0600 |
|---|---|---|
| committer | Karl Williamson <khw@cpan.org> | 2014-08-25 11:13:41 -0600 |
| commit | 96ca48da9bec7b317ccdc743dffe3f593d5f56f3 (patch) | |
| tree | 56e916a5b42ddf64716a803bb0b3d040ce36dea1 /handy.h | |
| parent | 875c62cc90c91001b2167a142b230062330e2903 (diff) | |
| download | perl-96ca48da9bec7b317ccdc743dffe3f593d5f56f3.tar.gz | |
handy.h, regcomp.c: Add, clarify comments
Diffstat (limited to 'handy.h')
| -rw-r--r-- | handy.h | 11 |
1 files changed, 6 insertions, 5 deletions
@@ -1056,7 +1056,7 @@ EXTCONST U32 PL_charclass[]; # define isALPHANUMERIC_A(c) _generic_isCC_A(c, _CC_ALPHANUMERIC) # define isBLANK_A(c) _generic_isCC_A(c, _CC_BLANK) # define isCNTRL_A(c) _generic_isCC_A(c, _CC_CNTRL) -# define isDIGIT_A(c) _generic_isCC(c, _CC_DIGIT) +# define isDIGIT_A(c) _generic_isCC(c, _CC_DIGIT) /* No non-ASCII digits */ # define isGRAPH_A(c) _generic_isCC_A(c, _CC_GRAPH) # define isLOWER_A(c) _generic_isCC_A(c, _CC_LOWER) # define isPRINT_A(c) _generic_isCC_A(c, _CC_PRINT) @@ -1065,7 +1065,7 @@ EXTCONST U32 PL_charclass[]; # define isSPACE_A(c) _generic_isCC_A(c, _CC_SPACE) # define isUPPER_A(c) _generic_isCC_A(c, _CC_UPPER) # define isWORDCHAR_A(c) _generic_isCC_A(c, _CC_WORDCHAR) -# define isXDIGIT_A(c) _generic_isCC(c, _CC_XDIGIT) +# define isXDIGIT_A(c) _generic_isCC(c, _CC_XDIGIT) /* No non-ASCII xdigits */ # define isIDFIRST_A(c) _generic_isCC_A(c, _CC_IDFIRST) # define isALPHA_L1(c) _generic_isCC(c, _CC_ALPHA) # define isALPHANUMERIC_L1(c) _generic_isCC(c, _CC_ALPHANUMERIC) @@ -1716,9 +1716,10 @@ typedef U32 line_t; * compiler, this reduces to an AND and a TEST. On both EBCDIC and ASCII * machines, 'A' and 'a' differ by a single bit; the same with the upper and * lower case of all other ASCII-range alphabetics. On ASCII platforms, they - * are 32 apart; on EBCDIC, they are 64. This uses an exclusive 'or' to find - * that bit and then inverts it to form a mask, with just a single 0, in the - * bit position where the upper- and lowercase differ. */ + * are 32 apart; on EBCDIC, they are 64. At compile time, this uses an + * exclusive 'or' to find that bit and then inverts it to form a mask, with + * just a single 0, in the bit position where the upper- and lowercase differ. + * */ #define isALPHA_FOLD_EQ(c1, c2) \ (__ASSERT_(isALPHA_A(c1) || isALPHA_A(c2)) \ ((c1) & ~('A' ^ 'a')) == ((c2) & ~('A' ^ 'a'))) |