thodg/libgit2/deps/pcre/pcre_newline.c

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• Hash : 9ceafb57
  Author :
  Date : 2019-01-12T22:55:31
  

  regexec: use pcre as our fallback/builtin regex Use PCRE 8.42 as the builtin regex implementation, using its POSIX compatibility layer. PCRE uses ASCII by default and the users locale will not influence its behavior, so its `regcomp` implementation is similar to `regcomp_l` with a C locale.

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• deps/pcre/pcre_newline.c

• /*************************************************
  *      Perl-Compatible Regular Expressions       *
  *************************************************/
  
  /* PCRE is a library of functions to support regular expressions whose syntax
  and semantics are as close as possible to those of the Perl 5 language.
  
                         Written by Philip Hazel
             Copyright (c) 1997-2012 University of Cambridge
  
  -----------------------------------------------------------------------------
  Redistribution and use in source and binary forms, with or without
  modification, 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, THE
  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
  LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  POSSIBILITY OF SUCH DAMAGE.
  -----------------------------------------------------------------------------
  */
  
  
  /* This module contains internal functions for testing newlines when more than
  one kind of newline is to be recognized. When a newline is found, its length is
  returned. In principle, we could implement several newline "types", each
  referring to a different set of newline characters. At present, PCRE supports
  only NLTYPE_FIXED, which gets handled without these functions, NLTYPE_ANYCRLF,
  and NLTYPE_ANY. The full list of Unicode newline characters is taken from
  http://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 the
  string 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
    utf          TRUE if in utf mode
  
  Returns:       TRUE or FALSE
  */
  
  BOOL
  PRIV(is_newline)(PCRE_PUCHAR ptr, int type, PCRE_PUCHAR endptr, int *lenptr,
    BOOL utf)
  {
  pcre_uint32 c;
  (void)utf;
  #ifdef SUPPORT_UTF
  if (utf)
    {
    GETCHAR(c, ptr);
    }
  else
  #endif  /* SUPPORT_UTF */
    c = *ptr;
  
  /* Note that this function is called only for ANY or ANYCRLF. */
  
  if (type == NLTYPE_ANYCRLF) switch(c)
    {
    case CHAR_LF: *lenptr = 1; return TRUE;
    case CHAR_CR: *lenptr = (ptr < endptr - 1 && ptr[1] == CHAR_LF)? 2 : 1;
                 return TRUE;
    default: return FALSE;
    }
  
  /* NLTYPE_ANY */
  
  else switch(c)
    {
  #ifdef EBCDIC
    case CHAR_NEL:
  #endif
    case CHAR_LF:
    case CHAR_VT:
    case CHAR_FF: *lenptr = 1; return TRUE;
  
    case CHAR_CR:
    *lenptr = (ptr < endptr - 1 && ptr[1] == CHAR_LF)? 2 : 1;
    return TRUE;
  
  #ifndef EBCDIC
  #ifdef COMPILE_PCRE8
    case CHAR_NEL: *lenptr = utf? 2 : 1; return TRUE;
    case 0x2028:                                       /* LS */
    case 0x2029: *lenptr = 3; return TRUE;             /* PS */
  #else /* COMPILE_PCRE16 || COMPILE_PCRE32 */
    case CHAR_NEL:
    case 0x2028:                                       /* LS */
    case 0x2029: *lenptr = 1; return TRUE;             /* PS */
  #endif  /* COMPILE_PCRE8 */
  #endif  /* Not EBCDIC */
  
    default: return FALSE;
    }
  }
  
  
  
  /*************************************************
  *     Check for newline at previous position     *
  *************************************************/
  
  /* It is guaranteed that the initial value of ptr is greater than the start of
  the 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
    utf          TRUE if in utf mode
  
  Returns:       TRUE or FALSE
  */
  
  BOOL
  PRIV(was_newline)(PCRE_PUCHAR ptr, int type, PCRE_PUCHAR startptr, int *lenptr,
    BOOL utf)
  {
  pcre_uint32 c;
  (void)utf;
  ptr--;
  #ifdef SUPPORT_UTF
  if (utf)
    {
    BACKCHAR(ptr);
    GETCHAR(c, ptr);
    }
  else
  #endif  /* SUPPORT_UTF */
    c = *ptr;
  
  /* Note that this function is called only for ANY or ANYCRLF. */
  
  if (type == NLTYPE_ANYCRLF) switch(c)
    {
    case CHAR_LF:
    *lenptr = (ptr > startptr && ptr[-1] == CHAR_CR)? 2 : 1;
    return TRUE;
  
    case CHAR_CR: *lenptr = 1; return TRUE;
    default: return FALSE;
    }
  
  /* NLTYPE_ANY */
  
  else switch(c)
    {
    case CHAR_LF:
    *lenptr = (ptr > startptr && ptr[-1] == CHAR_CR)? 2 : 1;
    return TRUE;
  
  #ifdef EBCDIC
    case CHAR_NEL:
  #endif
    case CHAR_VT:
    case CHAR_FF:
    case CHAR_CR: *lenptr = 1; return TRUE;
  
  #ifndef EBCDIC
  #ifdef COMPILE_PCRE8
    case CHAR_NEL: *lenptr = utf? 2 : 1; return TRUE;
    case 0x2028:                                       /* LS */
    case 0x2029: *lenptr = 3; return TRUE;             /* PS */
  #else /* COMPILE_PCRE16 || COMPILE_PCRE32 */
    case CHAR_NEL:
    case 0x2028:                                       /* LS */
    case 0x2029: *lenptr = 1; return TRUE;             /* PS */
  #endif  /* COMPILE_PCRE8 */
  #endif  /* NotEBCDIC */
  
    default: return FALSE;
    }
  }
  
  /* End of pcre_newline.c */
  

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