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) 1997-2012 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)
{
int c;
(void)utf;
#ifdef SUPPORT_UTF
if (utf)
  {
  GETCHAR(c, ptr);
  }
else
#endif  /* SUPPORT_UTF */
  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 */
#ifdef COMPILE_PCRE8
  case 0x0085: *lenptr = utf? 2 : 1; return TRUE;    /* NEL */
  case 0x2028:                                       /* LS */
  case 0x2029: *lenptr = 3; return TRUE;             /* PS */
#else
  case 0x0085:                                       /* NEL */
  case 0x2028:                                       /* LS */
  case 0x2029: *lenptr = 1; return TRUE;             /* PS */
#endif /* COMPILE_PCRE8 */
  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)
{
int c;
(void)utf;
ptr--;
#ifdef SUPPORT_UTF
if (utf)
  {
  BACKCHAR(ptr);
  GETCHAR(c, ptr);
  }
else
#endif  /* SUPPORT_UTF */
  c = *ptr;

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 */
#ifdef COMPILE_PCRE8
  case 0x0085: *lenptr = utf? 2 : 1; return TRUE;   /* NEL */
  case 0x2028:                                      /* LS */
  case 0x2029: *lenptr = 3; return TRUE;            /* PS */
#else
  case 0x0085:                                       /* NEL */
  case 0x2028:                                       /* LS */
  case 0x2029: *lenptr = 1; return TRUE;             /* PS */
#endif /* COMPILE_PCRE8 */
  default: return FALSE;
  }
}

/* End of pcre_newline.c */
1	/*************************************************
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	Copyright (c) 1997-2012 University of Cambridge
10
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, NLTYPE_ANYCRLF,
46	and NLTYPE_ANY. The full list of Unicode newline characters is taken from
47	http://unicode.org/unicode/reports/tr18/. */
48
49
50	#ifdef HAVE_CONFIG_H
51	#include "config.h"
52	#endif
53
54	#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	type the newline type
68	endptr pointer to the end of the string
69	lenptr where to return the length
70	utf TRUE if in utf mode
71
72	Returns: TRUE or FALSE
73	*/
74
75	BOOL
76	PRIV(is_newline)(PCRE_PUCHAR ptr, int type, PCRE_PUCHAR endptr, int *lenptr,
77	BOOL utf)
78	{
79	int c;
80	(void)utf;
81	#ifdef SUPPORT_UTF
82	if (utf)
83	{
84	GETCHAR(c, ptr);
85	}
86	else
87	#endif /* SUPPORT_UTF */
88	c = *ptr;
89
90	if (type == NLTYPE_ANYCRLF) switch(c)
91	{
92	case 0x000a: lenptr = 1; return TRUE; / LF */
93	case 0x000d: *lenptr = (ptr < endptr - 1 && ptr[1] == 0x0a)? 2 : 1;
94	return TRUE; /* CR */
95	default: return FALSE;
96	}
97
98	/* NLTYPE_ANY */
99
100	else switch(c)
101	{
102	case 0x000a: /* LF */
103	case 0x000b: /* VT */
104	case 0x000c: lenptr = 1; return TRUE; / FF */
105	case 0x000d: *lenptr = (ptr < endptr - 1 && ptr[1] == 0x0a)? 2 : 1;
106	return TRUE; /* CR */
107	#ifdef COMPILE_PCRE8
108	case 0x0085: lenptr = utf? 2 : 1; return TRUE; / NEL */
109	case 0x2028: /* LS */
110	case 0x2029: lenptr = 3; return TRUE; / PS */
111	#else
112	case 0x0085: /* NEL */
113	case 0x2028: /* LS */
114	case 0x2029: lenptr = 1; return TRUE; / PS */
115	#endif /* COMPILE_PCRE8 */
116	default: return FALSE;
117	}
118	}
119
120
121
122	/*************************************************
123	* Check for newline at previous position *
124	*************************************************/
125
126	/* It is guaranteed that the initial value of ptr is greater than the start of
127	the string that is being processed.
128
129	Arguments:
130	ptr pointer to possible newline
131	type the newline type
132	startptr pointer to the start of the string
133	lenptr where to return the length
134	utf TRUE if in utf mode
135
136	Returns: TRUE or FALSE
137	*/
138
139	BOOL
140	PRIV(was_newline)(PCRE_PUCHAR ptr, int type, PCRE_PUCHAR startptr, int *lenptr,
141	BOOL utf)
142	{
143	int c;
144	(void)utf;
145	ptr--;
146	#ifdef SUPPORT_UTF
147	if (utf)
148	{
149	BACKCHAR(ptr);
150	GETCHAR(c, ptr);
151	}
152	else
153	#endif /* SUPPORT_UTF */
154	c = *ptr;
155
156	if (type == NLTYPE_ANYCRLF) switch(c)
157	{
158	case 0x000a: *lenptr = (ptr > startptr && ptr[-1] == 0x0d)? 2 : 1;
159	return TRUE; /* LF */
160	case 0x000d: lenptr = 1; return TRUE; / CR */
161	default: return FALSE;
162	}
163
164	else switch(c)
165	{
166	case 0x000a: *lenptr = (ptr > startptr && ptr[-1] == 0x0d)? 2 : 1;
167	return TRUE; /* LF */
168	case 0x000b: /* VT */
169	case 0x000c: /* FF */
170	case 0x000d: lenptr = 1; return TRUE; / CR */
171	#ifdef COMPILE_PCRE8
172	case 0x0085: lenptr = utf? 2 : 1; return TRUE; / NEL */
173	case 0x2028: /* LS */
174	case 0x2029: lenptr = 3; return TRUE; / PS */
175	#else
176	case 0x0085: /* NEL */
177	case 0x2028: /* LS */
178	case 0x2029: lenptr = 1; return TRUE; / PS */
179	#endif /* COMPILE_PCRE8 */
180	default: return FALSE;
181	}
182	}
183
184	/* End of pcre_newline.c */
Name	Value
svn:eol-style	native
svn:keywords	"Author Date Id Revision Url"