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) 1997-2008 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
  utf8         TRUE if in utf8 mode

Returns:       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 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
  utf8         TRUE if in utf8 mode

Returns:       TRUE or FALSE
*/

BOOL
_pcre_was_newline(const uschar *ptr, int type, const uschar *startptr,
  int *lenptr, BOOL utf8)
{
int c;
ptr--;
#ifdef SUPPORT_UTF8
if (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 */
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	305	Copyright (c) 1997-2008 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	ph10	150	/* This module contains internal functions for testing newlines when more than
42	nigel	93	one kind of newline is to be recognized. When a newline is found, its length is
43	ph10	150	returned. In principle, we could implement several newline "types", each
44			referring to a different set of newline characters. At present, PCRE supports
45	ph10	149	only NLTYPE_FIXED, which gets handled without these functions, NLTYPE_ANYCRLF,
46			and NLTYPE_ANY. The full list of Unicode newline characters is taken from
47	nigel	93	http://unicode.org/unicode/reports/tr18/. */
48
49
50	ph10	200	#ifdef HAVE_CONFIG_H
51	ph10	236	#include "config.h"
52	ph10	200	#endif
53	ph10	199
54	nigel	93	#include "pcre_internal.h"
55
56
57
58			/*************************************************
59			* Check for newline at given position *
60			*************************************************/
61
62			/* It is guaranteed that the initial value of ptr is less than the end of the
63			string that is being processed.
64
65			Arguments:
66			ptr pointer to possible newline
67	ph10	149	type the newline type
68	nigel	93	endptr pointer to the end of the string
69			lenptr where to return the length
70			utf8 TRUE if in utf8 mode
71
72			Returns: TRUE or FALSE
73			*/
74
75			BOOL
76	ph10	150	_pcre_is_newline(const uschar ptr, int type, const uschar endptr,
77	ph10	149	int *lenptr, BOOL utf8)
78	nigel	93	{
79			int c;
80			if (utf8) { GETCHAR(c, ptr); } else c = *ptr;
81	ph10	149
82			if (type == NLTYPE_ANYCRLF) switch(c)
83	nigel	93	{
84	ph10	149	case 0x000a: lenptr = 1; return TRUE; / LF */
85			case 0x000d: *lenptr = (ptr < endptr - 1 && ptr[1] == 0x0a)? 2 : 1;
86			return TRUE; /* CR */
87			default: return FALSE;
88			}
89
90			/* NLTYPE_ANY */
91
92			else switch(c)
93			{
94	nigel	93	case 0x000a: /* LF */
95			case 0x000b: /* VT */
96			case 0x000c: lenptr = 1; return TRUE; / FF */
97			case 0x000d: *lenptr = (ptr < endptr - 1 && ptr[1] == 0x0a)? 2 : 1;
98			return TRUE; /* CR */
99			case 0x0085: lenptr = utf8? 2 : 1; return TRUE; / NEL */
100			case 0x2028: /* LS */
101			case 0x2029: lenptr = 3; return TRUE; / PS */
102			default: return FALSE;
103			}
104			}
105
106
107
108			/*************************************************
109			* Check for newline at previous position *
110			*************************************************/
111
112			/* It is guaranteed that the initial value of ptr is greater than the start of
113			the string that is being processed.
114
115			Arguments:
116			ptr pointer to possible newline
117	ph10	149	type the newline type
118	nigel	93	startptr pointer to the start of the string
119			lenptr where to return the length
120			utf8 TRUE if in utf8 mode
121
122			Returns: TRUE or FALSE
123			*/
124
125			BOOL
126	ph10	150	_pcre_was_newline(const uschar ptr, int type, const uschar startptr,
127	ph10	149	int *lenptr, BOOL utf8)
128	nigel	93	{
129			int c;
130			ptr--;
131	ph10	207	#ifdef SUPPORT_UTF8
132	nigel	93	if (utf8)
133			{
134			BACKCHAR(ptr);
135			GETCHAR(c, ptr);
136			}
137			else c = *ptr;
138	ph10	208	#else /* no UTF-8 support */
139	ph10	207	c = *ptr;
140			#endif /* SUPPORT_UTF8 */
141	ph10	149
142			if (type == NLTYPE_ANYCRLF) switch(c)
143	nigel	93	{
144			case 0x000a: *lenptr = (ptr > startptr && ptr[-1] == 0x0d)? 2 : 1;
145			return TRUE; /* LF */
146	ph10	149	case 0x000d: lenptr = 1; return TRUE; / CR */
147			default: return FALSE;
148			}
149
150			else switch(c)
151			{
152			case 0x000a: *lenptr = (ptr > startptr && ptr[-1] == 0x0d)? 2 : 1;
153			return TRUE; /* LF */
154	nigel	93	case 0x000b: /* VT */
155			case 0x000c: /* FF */
156			case 0x000d: lenptr = 1; return TRUE; / CR */
157			case 0x0085: lenptr = utf8? 2 : 1; return TRUE; / NEL */
158			case 0x2028: /* LS */
159			case 0x2029: lenptr = 3; return TRUE; / PS */
160			default: return FALSE;
161			}
162			}
163
164			/* End of pcre_newline.c */
Name	Value
svn:eol-style	native
svn:keywords	"Author Date Id Revision Url"