code/trunk/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) 1997-2007 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, and NLTYPE_ALL,
so for now the type isn't passed into the functions. It can easily be added
later if required. The full list of Unicode newline characters is taken from
http://unicode.org/unicode/reports/tr18/. */


#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
  endptr       pointer to the end of the string
  lenptr       where to return the length
  utf8         TRUE if in utf8 mode

Returns:       TRUE or FALSE
*/

BOOL
_pcre_is_newline(const uschar *ptr, const uschar *endptr, int *lenptr,
  BOOL utf8)
{
int c;
if (utf8) { GETCHAR(c, ptr); } else c = *ptr;
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 of
the string that is being processed.

Arguments:
  ptr          pointer to possible newline
  startptr     pointer to the start of the string
  lenptr       where to return the length
  utf8         TRUE if in utf8 mode

Returns:       TRUE or FALSE
*/

BOOL
_pcre_was_newline(const uschar *ptr, const uschar *startptr, int *lenptr,
  BOOL utf8)
{
int c;
ptr--;
if (utf8)
  {
  BACKCHAR(ptr);
  GETCHAR(c, ptr);
  }
else c = *ptr;
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 */
1	nigel	93	/*************************************************
2			* Perl-Compatible Regular Expressions *
3			*************************************************/
4
5			/* PCRE is a library of functions to support regular expressions whose syntax
6			and semantics are as close as possible to those of the Perl 5 language.
7
8			Written by Philip Hazel
9	ph10	117	Copyright (c) 1997-2007 University of Cambridge
10	nigel	93
11			-----------------------------------------------------------------------------
12			Redistribution and use in source and binary forms, with or without
13			modification, are permitted provided that the following conditions are met:
14
15			* Redistributions of source code must retain the above copyright notice,
16			this list of conditions and the following disclaimer.
17
18			* Redistributions in binary form must reproduce the above copyright
19			notice, this list of conditions and the following disclaimer in the
20			documentation and/or other materials provided with the distribution.
21
22			* Neither the name of the University of Cambridge nor the names of its
23			contributors may be used to endorse or promote products derived from
24			this software without specific prior written permission.
25
26			THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
27			AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28			IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29			ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
30			LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
31			CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
32			SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
33			INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
34			CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
35			ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
36			POSSIBILITY OF SUCH DAMAGE.
37			-----------------------------------------------------------------------------
38			*/
39
40
41			/* This module contains internal functions for testing newlines when more than
42			one kind of newline is to be recognized. When a newline is found, its length is
43			returned. In principle, we could implement several newline "types", each
44			referring to a different set of newline characters. At present, PCRE supports
45			only NLTYPE_FIXED, which gets handled without these functions, and NLTYPE_ALL,
46			so for now the type isn't passed into the functions. It can easily be added
47			later if required. The full list of Unicode newline characters is taken from
48			http://unicode.org/unicode/reports/tr18/. */
49
50
51			#include "pcre_internal.h"
52
53
54
55			/*************************************************
56			* Check for newline at given position *
57			*************************************************/
58
59			/* It is guaranteed that the initial value of ptr is less than the end of the
60			string that is being processed.
61
62			Arguments:
63			ptr pointer to possible newline
64			endptr pointer to the end of the string
65			lenptr where to return the length
66			utf8 TRUE if in utf8 mode
67
68			Returns: TRUE or FALSE
69			*/
70
71			BOOL
72			_pcre_is_newline(const uschar ptr, const uschar endptr, int *lenptr,
73			BOOL utf8)
74			{
75			int c;
76			if (utf8) { GETCHAR(c, ptr); } else c = *ptr;
77			switch(c)
78			{
79			case 0x000a: /* LF */
80			case 0x000b: /* VT */
81			case 0x000c: lenptr = 1; return TRUE; / FF */
82			case 0x000d: *lenptr = (ptr < endptr - 1 && ptr[1] == 0x0a)? 2 : 1;
83			return TRUE; /* CR */
84			case 0x0085: lenptr = utf8? 2 : 1; return TRUE; / NEL */
85			case 0x2028: /* LS */
86			case 0x2029: lenptr = 3; return TRUE; / PS */
87			default: return FALSE;
88			}
89			}
90
91
92
93			/*************************************************
94			* Check for newline at previous position *
95			*************************************************/
96
97			/* It is guaranteed that the initial value of ptr is greater than the start of
98			the string that is being processed.
99
100			Arguments:
101			ptr pointer to possible newline
102			startptr pointer to the start of the string
103			lenptr where to return the length
104			utf8 TRUE if in utf8 mode
105
106			Returns: TRUE or FALSE
107			*/
108
109			BOOL
110			_pcre_was_newline(const uschar ptr, const uschar startptr, int *lenptr,
111			BOOL utf8)
112			{
113			int c;
114			ptr--;
115			if (utf8)
116			{
117			BACKCHAR(ptr);
118			GETCHAR(c, ptr);
119			}
120			else c = *ptr;
121			switch(c)
122			{
123			case 0x000a: *lenptr = (ptr > startptr && ptr[-1] == 0x0d)? 2 : 1;
124			return TRUE; /* LF */
125			case 0x000b: /* VT */
126			case 0x000c: /* FF */
127			case 0x000d: lenptr = 1; return TRUE; / CR */
128			case 0x0085: lenptr = utf8? 2 : 1; return TRUE; / NEL */
129			case 0x2028: /* LS */
130			case 0x2029: lenptr = 3; return TRUE; / PS */
131			default: return FALSE;
132			}
133			}
134
135			/* End of pcre_newline.c */
Name	Value
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svn:keywords	"Author Date Id Revision Url"