/**************************************************      Perl-Compatible Regular Expressions       **************************************************//* PCRE is a library of functions to support regular expressions whose syntaxand semantics are as close as possible to those of the Perl 5 language.                       Written by Philip Hazel           Copyright (c) 1997-2007 University of Cambridge-----------------------------------------------------------------------------Redistribution and use in source and binary forms, with or withoutmodification, are permitted provided that the following conditions are met:    * Redistributions of source code must retain the above copyright notice,      this list of conditions and the following disclaimer.    * Redistributions in binary form must reproduce the above copyright      notice, this list of conditions and the following disclaimer in the      documentation and/or other materials provided with the distribution.    * Neither the name of the University of Cambridge nor the names of its      contributors may be used to endorse or promote products derived from      this software without specific prior written permission.THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THEIMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSEARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BELIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, ORCONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OFSUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESSINTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER INCONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THEPOSSIBILITY OF SUCH DAMAGE.-----------------------------------------------------------------------------*//* This module contains internal functions for testing newlines when more thanone kind of newline is to be recognized. When a newline is found, its length isreturned. In principle, we could implement several newline "types", eachreferring to a different set of newline characters. At present, PCRE supportsonly NLTYPE_FIXED, which gets handled without these functions, NLTYPE_ANYCRLF,and NLTYPE_ANY. The full list of Unicode newline characters is taken fromhttp://unicode.org/unicode/reports/tr18/. */#ifdef HAVE_CONFIG_H#include "config.h"#endif#include "pcre_internal.h"/**************************************************      Check for newline at given position       **************************************************//* It is guaranteed that the initial value of ptr is less than the end of thestring that is being processed.Arguments:  ptr          pointer to possible newline  type         the newline type  endptr       pointer to the end of the string  lenptr       where to return the length  utf8         TRUE if in utf8 modeReturns:       TRUE or FALSE*/BOOL_pcre_is_newline(const uschar *ptr, int type, const uschar *endptr,  int *lenptr, BOOL utf8){int c;if (utf8) { GETCHAR(c, ptr); } else c = *ptr;if (type == NLTYPE_ANYCRLF) switch(c)  {  case 0x000a: *lenptr = 1; return TRUE;             /* LF */  case 0x000d: *lenptr = (ptr < endptr - 1 && ptr[1] == 0x0a)? 2 : 1;               return TRUE;                          /* CR */  default: return FALSE;  }/* NLTYPE_ANY */else switch(c)  {  case 0x000a:                                       /* LF */  case 0x000b:                                       /* VT */  case 0x000c: *lenptr = 1; return TRUE;             /* FF */  case 0x000d: *lenptr = (ptr < endptr - 1 && ptr[1] == 0x0a)? 2 : 1;               return TRUE;                          /* CR */  case 0x0085: *lenptr = utf8? 2 : 1; return TRUE;   /* NEL */  case 0x2028:                                       /* LS */  case 0x2029: *lenptr = 3; return TRUE;             /* PS */  default: return FALSE;  }}/**************************************************     Check for newline at previous position     **************************************************//* It is guaranteed that the initial value of ptr is greater than the start ofthe string that is being processed.Arguments:  ptr          pointer to possible newline  type         the newline type  startptr     pointer to the start of the string  lenptr       where to return the length  utf8         TRUE if in utf8 modeReturns:       TRUE or FALSE*/BOOL_pcre_was_newline(const uschar *ptr, int type, const uschar *startptr,  int *lenptr, BOOL utf8){int c;ptr--;#ifdef SUPPORT_UTF8if (utf8)  {  BACKCHAR(ptr);  GETCHAR(c, ptr);  }else c = *ptr;#else   /* no UTF-8 support */c = *ptr;#endif  /* SUPPORT_UTF8 */if (type == NLTYPE_ANYCRLF) switch(c)  {  case 0x000a: *lenptr = (ptr > startptr && ptr[-1] == 0x0d)? 2 : 1;               return TRUE;                         /* LF */  case 0x000d: *lenptr = 1; return TRUE;            /* CR */  default: return FALSE;  }else switch(c)  {  case 0x000a: *lenptr = (ptr > startptr && ptr[-1] == 0x0d)? 2 : 1;               return TRUE;                         /* LF */  case 0x000b:                                      /* VT */  case 0x000c:                                      /* FF */  case 0x000d: *lenptr = 1; return TRUE;            /* CR */  case 0x0085: *lenptr = utf8? 2 : 1; return TRUE;  /* NEL */  case 0x2028:                                      /* LS */  case 0x2029: *lenptr = 3; return TRUE;            /* PS */  default: return FALSE;  }}/* End of pcre_newline.c */