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revision 148 by ph10, Fri Mar 30 15:55:18 2007 UTC revision 149 by ph10, Mon Apr 16 15:28:08 2007 UTC
# Line 221  documentation. Line 221  documentation.
221  .SH NEWLINES  .SH NEWLINES
222  .rs  .rs
223  .sp  .sp
224  PCRE supports four different conventions for indicating line breaks in  PCRE supports five different conventions for indicating line breaks in
225  strings: a single CR (carriage return) character, a single LF (linefeed)  strings: a single CR (carriage return) character, a single LF (linefeed)
226  character, the two-character sequence CRLF, or any Unicode newline sequence.  character, the two-character sequence CRLF, any of the three preceding, or any
227  The Unicode newline sequences are the three just mentioned, plus the single  Unicode newline sequence. The Unicode newline sequences are the three just
228  characters VT (vertical tab, U+000B), FF (formfeed, U+000C), NEL (next line,  mentioned, plus the single characters VT (vertical tab, U+000B), FF (formfeed,
229  U+0085), LS (line separator, U+2028), and PS (paragraph separator, U+2029).  U+000C), NEL (next line, U+0085), LS (line separator, U+2028), and PS
230    (paragraph separator, U+2029).
231  .P  .P
232  Each of the first three conventions is used by at least one operating system as  Each of the first three conventions is used by at least one operating system as
233  its standard newline sequence. When PCRE is built, a default can be specified.  its standard newline sequence. When PCRE is built, a default can be specified.
# Line 297  properties is available; otherwise it is Line 298  properties is available; otherwise it is
298  .sp  .sp
299  The output is an integer whose value specifies the default character sequence  The output is an integer whose value specifies the default character sequence
300  that is recognized as meaning "newline". The four values that are supported  that is recognized as meaning "newline". The four values that are supported
301  are: 10 for LF, 13 for CR, 3338 for CRLF, and -1 for ANY. The default should  are: 10 for LF, 13 for CR, 3338 for CRLF, -2 for ANYCRLF, and -1 for ANY. The
302  normally be the standard sequence for your operating system.  default should normally be the standard sequence for your operating system.
303  .sp  .sp
304    PCRE_CONFIG_LINK_SIZE    PCRE_CONFIG_LINK_SIZE
305  .sp  .sp
# Line 532  occurrences of ^ or $ in a pattern, sett Line 533  occurrences of ^ or $ in a pattern, sett
533    PCRE_NEWLINE_CR    PCRE_NEWLINE_CR
534    PCRE_NEWLINE_LF    PCRE_NEWLINE_LF
535    PCRE_NEWLINE_CRLF    PCRE_NEWLINE_CRLF
536      PCRE_NEWLINE_ANYCRLF
537    PCRE_NEWLINE_ANY    PCRE_NEWLINE_ANY
538  .sp  .sp
539  These options override the default newline definition that was chosen when PCRE  These options override the default newline definition that was chosen when PCRE
540  was built. Setting the first or the second specifies that a newline is  was built. Setting the first or the second specifies that a newline is
541  indicated by a single character (CR or LF, respectively). Setting  indicated by a single character (CR or LF, respectively). Setting
542  PCRE_NEWLINE_CRLF specifies that a newline is indicated by the two-character  PCRE_NEWLINE_CRLF specifies that a newline is indicated by the two-character
543  CRLF sequence. Setting PCRE_NEWLINE_ANY specifies that any Unicode newline  CRLF sequence. Setting PCRE_NEWLINE_ANYCRLF specifies that any of the three
544  sequence should be recognized. The Unicode newline sequences are the three just  preceding sequences should be recognized. Setting PCRE_NEWLINE_ANY specifies
545  mentioned, plus the single characters VT (vertical tab, U+000B), FF (formfeed,  that any Unicode newline sequence should be recognized. The Unicode newline
546  U+000C), NEL (next line, U+0085), LS (line separator, U+2028), and PS  sequences are the three just mentioned, plus the single characters VT (vertical
547  (paragraph separator, U+2029). The last two are recognized only in UTF-8 mode.  tab, U+000B), FF (formfeed, U+000C), NEL (next line, U+0085), LS (line
548    separator, U+2028), and PS (paragraph separator, U+2029). The last two are
549    recognized only in UTF-8 mode.
550  .P  .P
551  The newline setting in the options word uses three bits that are treated  The newline setting in the options word uses three bits that are treated
552  as a number, giving eight possibilities. Currently only five are used (default  as a number, giving eight possibilities. Currently only six are used (default
553  plus the four values above). This means that if you set more than one newline  plus the five values above). This means that if you set more than one newline
554  option, the combination may or may not be sensible. For example,  option, the combination may or may not be sensible. For example,
555  PCRE_NEWLINE_CR with PCRE_NEWLINE_LF is equivalent to PCRE_NEWLINE_CRLF, but  PCRE_NEWLINE_CR with PCRE_NEWLINE_LF is equivalent to PCRE_NEWLINE_CRLF, but
556  other combinations yield unused numbers and cause an error.  other combinations may yield unused numbers and cause an error.
557  .P  .P
558  The only time that a line break is specially recognized when compiling a  The only time that a line break is specially recognized when compiling a
559  pattern is if PCRE_EXTENDED is set, and an unescaped # outside a character  pattern is if PCRE_EXTENDED is set, and an unescaped # outside a character
# Line 1150  matching time. Line 1154  matching time.
1154    PCRE_NEWLINE_CR    PCRE_NEWLINE_CR
1155    PCRE_NEWLINE_LF    PCRE_NEWLINE_LF
1156    PCRE_NEWLINE_CRLF    PCRE_NEWLINE_CRLF
1157      PCRE_NEWLINE_ANYCRLF
1158    PCRE_NEWLINE_ANY    PCRE_NEWLINE_ANY
1159  .sp  .sp
1160  These options override the newline definition that was chosen or defaulted when  These options override the newline definition that was chosen or defaulted when
# Line 1157  the pattern was compiled. For details, s Line 1162  the pattern was compiled. For details, s
1162  \fBpcre_compile()\fP above. During matching, the newline choice affects the  \fBpcre_compile()\fP above. During matching, the newline choice affects the
1163  behaviour of the dot, circumflex, and dollar metacharacters. It may also alter  behaviour of the dot, circumflex, and dollar metacharacters. It may also alter
1164  the way the match position is advanced after a match failure for an unanchored  the way the match position is advanced after a match failure for an unanchored
1165  pattern. When PCRE_NEWLINE_CRLF or PCRE_NEWLINE_ANY is set, and a match attempt  pattern. When PCRE_NEWLINE_CRLF, PCRE_NEWLINE_ANYCRLF, or PCRE_NEWLINE_ANY is
1166  fails when the current position is at a CRLF sequence, the match position is  set, and a match attempt fails when the current position is at a CRLF sequence,
1167  advanced by two characters instead of one, in other words, to after the CRLF.  the match position is advanced by two characters instead of one, in other
1168    words, to after the CRLF.
1169  .sp  .sp
1170    PCRE_NOTBOL    PCRE_NOTBOL
1171  .sp  .sp
# Line 1843  Cambridge CB2 3QH, England. Line 1849  Cambridge CB2 3QH, England.
1849  .rs  .rs
1850  .sp  .sp
1851  .nf  .nf
1852  Last updated: 06 March 2007  Last updated: 16 April 2007
1853  Copyright (c) 1997-2007 University of Cambridge.  Copyright (c) 1997-2007 University of Cambridge.
1854  .fi  .fi

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