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authorErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
committerErlang/OTP <[email protected]>2009-11-20 14:54:40 +0000
commit84adefa331c4159d432d22840663c38f155cd4c1 (patch)
treebff9a9c66adda4df2106dfd0e5c053ab182a12bd /erts/emulator/pcre/pcre_newline.c
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The R13B03 release.OTP_R13B03
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diff --git a/erts/emulator/pcre/pcre_newline.c b/erts/emulator/pcre/pcre_newline.c
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+/*************************************************
+* 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/. */
+
+/* %ExternalCopyright% */
+
+#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
+_erts_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
+_erts_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 */