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;
  
/* 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   /* 16-bit (can't be EBCDIC) */
  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)
{
int 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
  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 */
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	/* Note that this function is called only for ANY or ANYCRLF. */
91
92	if (type == NLTYPE_ANYCRLF) switch(c)
93	{
94	case CHAR_LF: *lenptr = 1; return TRUE;
95	case CHAR_CR: *lenptr = (ptr < endptr - 1 && ptr[1] == CHAR_LF)? 2 : 1;
96	return TRUE;
97	default: return FALSE;
98	}
99
100	/* NLTYPE_ANY */
101
102	else switch(c)
103	{
104	#ifdef EBCDIC
105	case CHAR_NEL:
106	#endif
107	case CHAR_LF:
108	case CHAR_VT:
109	case CHAR_FF: *lenptr = 1; return TRUE;
110
111	case CHAR_CR:
112	*lenptr = (ptr < endptr - 1 && ptr[1] == CHAR_LF)? 2 : 1;
113	return TRUE;
114
115	#ifndef EBCDIC
116	#ifdef COMPILE_PCRE8
117	case CHAR_NEL: *lenptr = utf? 2 : 1; return TRUE;
118	case 0x2028: /* LS */
119	case 0x2029: lenptr = 3; return TRUE; / PS */
120	#else /* 16-bit (can't be EBCDIC) */
121	case CHAR_NEL:
122	case 0x2028: /* LS */
123	case 0x2029: lenptr = 1; return TRUE; / PS */
124	#endif /* COMPILE_PCRE8 */
125	#endif /* Not EBCDIC */
126
127	default: return FALSE;
128	}
129	}
130
131
132
133	/*************************************************
134	* Check for newline at previous position *
135	*************************************************/
136
137	/* It is guaranteed that the initial value of ptr is greater than the start of
138	the string that is being processed.
139
140	Arguments:
141	ptr pointer to possible newline
142	type the newline type
143	startptr pointer to the start of the string
144	lenptr where to return the length
145	utf TRUE if in utf mode
146
147	Returns: TRUE or FALSE
148	*/
149
150	BOOL
151	PRIV(was_newline)(PCRE_PUCHAR ptr, int type, PCRE_PUCHAR startptr, int *lenptr,
152	BOOL utf)
153	{
154	int c;
155	(void)utf;
156	ptr--;
157	#ifdef SUPPORT_UTF
158	if (utf)
159	{
160	BACKCHAR(ptr);
161	GETCHAR(c, ptr);
162	}
163	else
164	#endif /* SUPPORT_UTF */
165	c = *ptr;
166
167	/* Note that this function is called only for ANY or ANYCRLF. */
168
169	if (type == NLTYPE_ANYCRLF) switch(c)
170	{
171	case CHAR_LF:
172	*lenptr = (ptr > startptr && ptr[-1] == CHAR_CR)? 2 : 1;
173	return TRUE;
174
175	case CHAR_CR: *lenptr = 1; return TRUE;
176	default: return FALSE;
177	}
178
179	/* NLTYPE_ANY */
180
181	else switch(c)
182	{
183	case CHAR_LF:
184	*lenptr = (ptr > startptr && ptr[-1] == CHAR_CR)? 2 : 1;
185	return TRUE;
186
187	#ifdef EBCDIC
188	case CHAR_NEL:
189	#endif
190	case CHAR_VT:
191	case CHAR_FF:
192	case CHAR_CR: *lenptr = 1; return TRUE;
193
194	#ifndef EBCDIC
195	#ifdef COMPILE_PCRE8
196	case CHAR_NEL: *lenptr = utf? 2 : 1; return TRUE;
197	case 0x2028: /* LS */
198	case 0x2029: lenptr = 3; return TRUE; / PS */
199	#else
200	case CHAR_NEL:
201	case 0x2028: /* LS */
202	case 0x2029: lenptr = 1; return TRUE; / PS */
203	#endif /* COMPILE_PCRE8 */
204	#endif /* NotEBCDIC */
205
206	default: return FALSE;
207	}
208	}
209
210	/* End of pcre_newline.c */
Name	Value
svn:eol-style	native
svn:keywords	"Author Date Id Revision Url"