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| -rw-r--r-- | doc/pcrepattern.3 | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/doc/pcrepattern.3 b/doc/pcrepattern.3 index 3b8c639..952451f 100644 --- a/doc/pcrepattern.3 +++ b/doc/pcrepattern.3 @@ -336,22 +336,22 @@ When PCRE is compiled in EBCDIC mode, \ea, \ee, \ef, \en, \er, and \et generate the appropriate EBCDIC code values. The \ec escape is processed as specified for Perl in the \fBperlebcdic\fP document. The only characters that are allowed after \ec are A-Z, a-z, or one of @, [, \e, ], ^, _, or ?. Any -other character provokes a compile-time error. The sequence \e@ encodes -character code 0; the letters (in either case) encode characters 1-26 (hex 01 -to hex 1A); [, \e, ], ^, and _ encode characters 27-31 (hex 1B to hex 1F), and -\e? becomes either 255 (hex FF) or 95 (hex 5F). +other character provokes a compile-time error. The sequence \ec@ encodes +character code 0; after \ec the letters (in either case) encode characters 1-26 +(hex 01 to hex 1A); [, \e, ], ^, and _ encode characters 27-31 (hex 1B to hex +1F), and \ec? becomes either 255 (hex FF) or 95 (hex 5F). .P -Thus, apart from \e?, these escapes generate the same character code values as +Thus, apart from \ec?, these escapes generate the same character code values as they do in an ASCII environment, though the meanings of the values mostly -differ. For example, \eG always generates code value 7, which is BEL in ASCII +differ. For example, \ecG always generates code value 7, which is BEL in ASCII but DEL in EBCDIC. .P -The sequence \e? generates DEL (127, hex 7F) in an ASCII environment, but +The sequence \ec? generates DEL (127, hex 7F) in an ASCII environment, but because 127 is not a control character in EBCDIC, Perl makes it generate the APC character. Unfortunately, there are several variants of EBCDIC. In most of them the APC character has the value 255 (hex FF), but in the one Perl calls POSIX-BC its value is 95 (hex 5F). If certain other characters have POSIX-BC -values, PCRE makes \e? generate 95; otherwise it generates 255. +values, PCRE makes \ec? generate 95; otherwise it generates 255. .P After \e0 up to two further octal digits are read. If there are fewer than two digits, just those that are present are used. Thus the sequence \e0\ex\e015 |