Upgrade to PCRE version 6.2.

# Don't worry, upgrade for other branches is coming

1 files changed, 909 insertions, 0 deletions

diff --git a/ext/pcre/pcrelib/pcre_internal.h b/ext/pcre/pcrelib/pcre_internal.h
new file mode 100644
index 0000000000..bffab024cb
--- /dev/null
+++ b/ext/pcre/pcrelib/pcre_internal.h
@@ -0,0 +1,909 @@
+/*************************************************
+*      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) 1997-2005 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 header contains definitions that are shared between the different
+modules, but which are not relevant to the exported API. This includes some
+functions whose names all begin with "_pcre_". */
+
+
+/* Define DEBUG to get debugging output on stdout. */
+
+/****
+#define DEBUG
+****/
+
+/* Use a macro for debugging printing, 'cause that eliminates the use of #ifdef
+inline, and there are *still* stupid compilers about that don't like indented
+pre-processor statements, or at least there were when I first wrote this. After
+all, it had only been about 10 years then... */
+
+#ifdef DEBUG
+#define DPRINTF(p) printf p
+#else
+#define DPRINTF(p) /*nothing*/
+#endif
+
+
+/* Get the definitions provided by running "configure" */
+
+#ifdef PHP_WIN32
+# include "config.w32.h"
+#else
+# include <php_config.h>
+#endif
+
+/* Standard C headers plus the external interface definition. The only time
+setjmp and stdarg are used is when NO_RECURSE is set. */
+
+#include <ctype.h>
+#include <limits.h>
+#include <setjmp.h>
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#ifndef PCRE_SPY
+#define PCRE_DEFINITION       /* Win32 __declspec(export) trigger for .dll */
+#endif
+
+/* We need to have types that specify unsigned 16-bit and 32-bit integers. We
+cannot determine these outside the compilation (e.g. by running a program as
+part of "configure") because PCRE is often cross-compiled for use on other
+systems. Instead we make use of the maximum sizes that are available at
+preprocessor time in standard C environments. */
+
+#if USHRT_MAX == 65535
+  typedef unsigned short pcre_uint16;
+#elif UINT_MAX == 65535
+  typedef unsigned int pcre_uint16;
+#else
+  #error Cannot determine a type for 16-bit unsigned integers
+#endif
+
+#if UINT_MAX == 4294967295
+  typedef unsigned int pcre_uint32;
+#elif ULONG_MAX == 4294967295
+  typedef unsigned long int pcre_uint32;
+#else
+  #error Cannot determine a type for 32-bit unsigned integers
+#endif
+
+/* All character handling must be done as unsigned characters. Otherwise there
+are problems with top-bit-set characters and functions such as isspace().
+However, we leave the interface to the outside world as char *, because that
+should make things easier for callers. We define a short type for unsigned char
+to save lots of typing. I tried "uchar", but it causes problems on Digital
+Unix, where it is defined in sys/types, so use "uschar" instead. */
+
+typedef unsigned char uschar;
+
+/* Include the public PCRE header */
+
+#include "pcre.h"
+
+/* Include the (copy of) the public ucp header, changing the external name into
+a private one. This does no harm, even if we aren't compiling UCP support. */
+
+#define ucp_findchar _pcre_ucp_findchar
+#include "ucp.h"
+
+/* When compiling for use with the Virtual Pascal compiler, these functions
+need to have their names changed. PCRE must be compiled with the -DVPCOMPAT
+option on the command line. */
+
+#ifdef VPCOMPAT
+#define strncmp(s1,s2,m) _strncmp(s1,s2,m)
+#define memcpy(d,s,n)    _memcpy(d,s,n)
+#define memmove(d,s,n)   _memmove(d,s,n)
+#define memset(s,c,n)    _memset(s,c,n)
+#else  /* VPCOMPAT */
+
+/* To cope with SunOS4 and other systems that lack memmove() but have bcopy(),
+define a macro for memmove() if HAVE_MEMMOVE is false, provided that HAVE_BCOPY
+is set. Otherwise, include an emulating function for those systems that have
+neither (there some non-Unix environments where this is the case). This assumes
+that all calls to memmove are moving strings upwards in store, which is the
+case in PCRE. */
+
+#if ! HAVE_MEMMOVE
+#undef  memmove        /* some systems may have a macro */
+#if HAVE_BCOPY
+#define memmove(a, b, c) bcopy(b, a, c)
+#else  /* HAVE_BCOPY */
+void *
+pcre_memmove(unsigned char *dest, const unsigned char *src, size_t n)
+{
+int i;
+dest += n;
+src += n;
+for (i = 0; i < n; ++i) *(--dest) =  *(--src);
+}
+#define memmove(a, b, c) pcre_memmove(a, b, c)
+#endif   /* not HAVE_BCOPY */
+#endif   /* not HAVE_MEMMOVE */
+#endif   /* not VPCOMPAT */
+
+
+/* PCRE keeps offsets in its compiled code as 2-byte quantities (always stored
+in big-endian order) by default. These are used, for example, to link from the
+start of a subpattern to its alternatives and its end. The use of 2 bytes per
+offset limits the size of the compiled regex to around 64K, which is big enough
+for almost everybody. However, I received a request for an even bigger limit.
+For this reason, and also to make the code easier to maintain, the storing and
+loading of offsets from the byte string is now handled by the macros that are
+defined here.
+
+The macros are controlled by the value of LINK_SIZE. This defaults to 2 in
+the config.h file, but can be overridden by using -D on the command line. This
+is automated on Unix systems via the "configure" command. */
+
+#if LINK_SIZE == 2
+
+#define PUT(a,n,d)   \
+  (a[n] = (d) >> 8), \
+  (a[(n)+1] = (d) & 255)
+
+#define GET(a,n) \
+  (((a)[n] << 8) | (a)[(n)+1])
+
+#define MAX_PATTERN_SIZE (1 << 16)
+
+
+#elif LINK_SIZE == 3
+
+#define PUT(a,n,d)       \
+  (a[n] = (d) >> 16),    \
+  (a[(n)+1] = (d) >> 8), \
+  (a[(n)+2] = (d) & 255)
+
+#define GET(a,n) \
+  (((a)[n] << 16) | ((a)[(n)+1] << 8) | (a)[(n)+2])
+
+#define MAX_PATTERN_SIZE (1 << 24)
+
+
+#elif LINK_SIZE == 4
+
+#define PUT(a,n,d)        \
+  (a[n] = (d) >> 24),     \
+  (a[(n)+1] = (d) >> 16), \
+  (a[(n)+2] = (d) >> 8),  \
+  (a[(n)+3] = (d) & 255)
+
+#define GET(a,n) \
+  (((a)[n] << 24) | ((a)[(n)+1] << 16) | ((a)[(n)+2] << 8) | (a)[(n)+3])
+
+#define MAX_PATTERN_SIZE (1 << 30)   /* Keep it positive */
+
+
+#else
+#error LINK_SIZE must be either 2, 3, or 4
+#endif
+
+
+/* Convenience macro defined in terms of the others */
+
+#define PUTINC(a,n,d)   PUT(a,n,d), a += LINK_SIZE
+
+
+/* PCRE uses some other 2-byte quantities that do not change when the size of
+offsets changes. There are used for repeat counts and for other things such as
+capturing parenthesis numbers in back references. */
+
+#define PUT2(a,n,d)   \
+  a[n] = (d) >> 8; \
+  a[(n)+1] = (d) & 255
+
+#define GET2(a,n) \
+  (((a)[n] << 8) | (a)[(n)+1])
+
+#define PUT2INC(a,n,d)  PUT2(a,n,d), a += 2
+
+
+/* When UTF-8 encoding is being used, a character is no longer just a single
+byte. The macros for character handling generate simple sequences when used in
+byte-mode, and more complicated ones for UTF-8 characters. */
+
+#ifndef SUPPORT_UTF8
+#define GETCHAR(c, eptr) c = *eptr;
+#define GETCHARTEST(c, eptr) c = *eptr;
+#define GETCHARINC(c, eptr) c = *eptr++;
+#define GETCHARINCTEST(c, eptr) c = *eptr++;
+#define GETCHARLEN(c, eptr, len) c = *eptr;
+#define BACKCHAR(eptr)
+
+#else   /* SUPPORT_UTF8 */
+
+/* Get the next UTF-8 character, not advancing the pointer. This is called when
+we know we are in UTF-8 mode. */
+
+#define GETCHAR(c, eptr) \
+  c = *eptr; \
+  if ((c & 0xc0) == 0xc0) \
+    { \
+    int gcii; \
+    int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \
+    int gcss = 6*gcaa; \
+    c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
+    for (gcii = 1; gcii <= gcaa; gcii++) \
+      { \
+      gcss -= 6; \
+      c |= (eptr[gcii] & 0x3f) << gcss; \
+      } \
+    }
+
+/* Get the next UTF-8 character, testing for UTF-8 mode, and not advancing the
+pointer. */
+
+#define GETCHARTEST(c, eptr) \
+  c = *eptr; \
+  if (utf8 && (c & 0xc0) == 0xc0) \
+    { \
+    int gcii; \
+    int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \
+    int gcss = 6*gcaa; \
+    c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
+    for (gcii = 1; gcii <= gcaa; gcii++) \
+      { \
+      gcss -= 6; \
+      c |= (eptr[gcii] & 0x3f) << gcss; \
+      } \
+    }
+
+/* Get the next UTF-8 character, advancing the pointer. This is called when we
+know we are in UTF-8 mode. */
+
+#define GETCHARINC(c, eptr) \
+  c = *eptr++; \
+  if ((c & 0xc0) == 0xc0) \
+    { \
+    int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \
+    int gcss = 6*gcaa; \
+    c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
+    while (gcaa-- > 0) \
+      { \
+      gcss -= 6; \
+      c |= (*eptr++ & 0x3f) << gcss; \
+      } \
+    }
+
+/* Get the next character, testing for UTF-8 mode, and advancing the pointer */
+
+#define GETCHARINCTEST(c, eptr) \
+  c = *eptr++; \
+  if (utf8 && (c & 0xc0) == 0xc0) \
+    { \
+    int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \
+    int gcss = 6*gcaa; \
+    c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
+    while (gcaa-- > 0) \
+      { \
+      gcss -= 6; \
+      c |= (*eptr++ & 0x3f) << gcss; \
+      } \
+    }
+
+/* Get the next UTF-8 character, not advancing the pointer, incrementing length
+if there are extra bytes. This is called when we know we are in UTF-8 mode. */
+
+#define GETCHARLEN(c, eptr, len) \
+  c = *eptr; \
+  if ((c & 0xc0) == 0xc0) \
+    { \
+    int gcii; \
+    int gcaa = _pcre_utf8_table4[c & 0x3f];  /* Number of additional bytes */ \
+    int gcss = 6*gcaa; \
+    c = (c & _pcre_utf8_table3[gcaa]) << gcss; \
+    for (gcii = 1; gcii <= gcaa; gcii++) \
+      { \
+      gcss -= 6; \
+      c |= (eptr[gcii] & 0x3f) << gcss; \
+      } \
+    len += gcaa; \
+    }
+
+/* If the pointer is not at the start of a character, move it back until
+it is. Called only in UTF-8 mode. */
+
+#define BACKCHAR(eptr) while((*eptr & 0xc0) == 0x80) eptr--;
+
+#endif
+
+
+/* In case there is no definition of offsetof() provided - though any proper
+Standard C system should have one. */
+
+#ifndef offsetof
+#define offsetof(p_type,field) ((size_t)&(((p_type *)0)->field))
+#endif
+
+
+/* These are the public options that can change during matching. */
+
+#define PCRE_IMS (PCRE_CASELESS|PCRE_MULTILINE|PCRE_DOTALL)
+
+/* Private options flags start at the most significant end of the four bytes,
+but skip the top bit so we can use ints for convenience without getting tangled
+with negative values. The public options defined in pcre.h start at the least
+significant end. Make sure they don't overlap! */
+
+#define PCRE_FIRSTSET      0x40000000  /* first_byte is set */
+#define PCRE_REQCHSET      0x20000000  /* req_byte is set */
+#define PCRE_STARTLINE     0x10000000  /* start after \n for multiline */
+#define PCRE_ICHANGED      0x08000000  /* i option changes within regex */
+#define PCRE_NOPARTIAL     0x04000000  /* can't use partial with this regex */
+
+/* Options for the "extra" block produced by pcre_study(). */
+
+#define PCRE_STUDY_MAPPED   0x01     /* a map of starting chars exists */
+
+/* Masks for identifying the public options that are permitted at compile
+time, run time, or study time, respectively. */
+
+#define PUBLIC_OPTIONS \
+  (PCRE_CASELESS|PCRE_EXTENDED|PCRE_ANCHORED|PCRE_MULTILINE| \
+   PCRE_DOTALL|PCRE_DOLLAR_ENDONLY|PCRE_EXTRA|PCRE_UNGREEDY|PCRE_UTF8| \
+   PCRE_NO_AUTO_CAPTURE|PCRE_NO_UTF8_CHECK|PCRE_AUTO_CALLOUT|PCRE_FIRSTLINE)
+
+#define PUBLIC_EXEC_OPTIONS \
+  (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK| \
+   PCRE_PARTIAL)
+
+#define PUBLIC_DFA_EXEC_OPTIONS \
+  (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY|PCRE_NO_UTF8_CHECK| \
+   PCRE_PARTIAL|PCRE_DFA_SHORTEST|PCRE_DFA_RESTART)
+
+#define PUBLIC_STUDY_OPTIONS 0   /* None defined */
+
+/* Magic number to provide a small check against being handed junk. Also used
+to detect whether a pattern was compiled on a host of different endianness. */
+
+#define MAGIC_NUMBER  0x50435245UL   /* 'PCRE' */
+
+/* Negative values for the firstchar and reqchar variables */
+
+#define REQ_UNSET (-2)
+#define REQ_NONE  (-1)
+
+/* The maximum remaining length of subject we are prepared to search for a
+req_byte match. */
+
+#define REQ_BYTE_MAX 1000
+
+/* Flags added to firstbyte or reqbyte; a "non-literal" item is either a
+variable-length repeat, or a anything other than literal characters. */
+
+#define REQ_CASELESS 0x0100    /* indicates caselessness */
+#define REQ_VARY     0x0200    /* reqbyte followed non-literal item */
+
+/* Miscellaneous definitions */
+
+typedef int BOOL;
+
+#define FALSE   0
+#define TRUE    1
+
+/* Escape items that are just an encoding of a particular data value. Note that
+ESC_n is defined as yet another macro, which is set in config.h to either \n
+(the default) or \r (which some people want). */
+
+#ifndef ESC_e
+#define ESC_e 27
+#endif
+
+#ifndef ESC_f
+#define ESC_f '\f'
+#endif
+
+#ifndef ESC_n
+#define ESC_n NEWLINE
+#endif
+
+#ifndef ESC_r
+#define ESC_r '\r'
+#endif
+
+/* We can't officially use ESC_t because it is a POSIX reserved identifier
+(presumably because of all the others like size_t). */
+
+#ifndef ESC_tee
+#define ESC_tee '\t'
+#endif
+
+/* These are escaped items that aren't just an encoding of a particular data
+value such as \n. They must have non-zero values, as check_escape() returns
+their negation. Also, they must appear in the same order as in the opcode
+definitions below, up to ESC_z. There's a dummy for OP_ANY because it
+corresponds to "." rather than an escape sequence. The final one must be
+ESC_REF as subsequent values are used for \1, \2, \3, etc. There is are two
+tests in the code for an escape greater than ESC_b and less than ESC_Z to
+detect the types that may be repeated. These are the types that consume
+characters. If any new escapes are put in between that don't consume a
+character, that code will have to change. */
+
+enum { ESC_A = 1, ESC_G, ESC_B, ESC_b, ESC_D, ESC_d, ESC_S, ESC_s, ESC_W,
+       ESC_w, ESC_dum1, ESC_C, ESC_P, ESC_p, ESC_X, ESC_Z, ESC_z, ESC_E,
+       ESC_Q, ESC_REF };
+
+/* Flag bits and data types for the extended class (OP_XCLASS) for classes that
+contain UTF-8 characters with values greater than 255. */
+
+#define XCL_NOT    0x01    /* Flag: this is a negative class */
+#define XCL_MAP    0x02    /* Flag: a 32-byte map is present */
+
+#define XCL_END       0    /* Marks end of individual items */
+#define XCL_SINGLE    1    /* Single item (one multibyte char) follows */
+#define XCL_RANGE     2    /* A range (two multibyte chars) follows */
+#define XCL_PROP      3    /* Unicode property (one property code) follows */
+#define XCL_NOTPROP   4    /* Unicode inverted property (ditto) */
+
+
+/* Opcode table: OP_BRA must be last, as all values >= it are used for brackets
+that extract substrings. Starting from 1 (i.e. after OP_END), the values up to
+OP_EOD must correspond in order to the list of escapes immediately above.
+Note that whenever this list is updated, the two macro definitions that follow
+must also be updated to match. */
+
+enum {
+  OP_END,            /* 0 End of pattern */
+
+  /* Values corresponding to backslashed metacharacters */
+
+  OP_SOD,            /* 1 Start of data: \A */
+  OP_SOM,            /* 2 Start of match (subject + offset): \G */
+  OP_NOT_WORD_BOUNDARY,  /*  3 \B */
+  OP_WORD_BOUNDARY,      /*  4 \b */
+  OP_NOT_DIGIT,          /*  5 \D */
+  OP_DIGIT,              /*  6 \d */
+  OP_NOT_WHITESPACE,     /*  7 \S */
+  OP_WHITESPACE,         /*  8 \s */
+  OP_NOT_WORDCHAR,       /*  9 \W */
+  OP_WORDCHAR,           /* 10 \w */
+  OP_ANY,            /* 11 Match any character */
+  OP_ANYBYTE,        /* 12 Match any byte (\C); different to OP_ANY for UTF-8 */
+  OP_NOTPROP,        /* 13 \P (not Unicode property) */
+  OP_PROP,           /* 14 \p (Unicode property) */
+  OP_EXTUNI,         /* 15 \X (extended Unicode sequence */
+  OP_EODN,           /* 16 End of data or \n at end of data: \Z. */
+  OP_EOD,            /* 17 End of data: \z */
+
+  OP_OPT,            /* 18 Set runtime options */
+  OP_CIRC,           /* 19 Start of line - varies with multiline switch */
+  OP_DOLL,           /* 20 End of line - varies with multiline switch */
+  OP_CHAR,           /* 21 Match one character, casefully */
+  OP_CHARNC,         /* 22 Match one character, caselessly */
+  OP_NOT,            /* 23 Match anything but the following char */
+
+  OP_STAR,           /* 24 The maximizing and minimizing versions of */
+  OP_MINSTAR,        /* 25 all these opcodes must come in pairs, with */
+  OP_PLUS,           /* 26 the minimizing one second. */
+  OP_MINPLUS,        /* 27 This first set applies to single characters */
+  OP_QUERY,          /* 28 */
+  OP_MINQUERY,       /* 29 */
+  OP_UPTO,           /* 30 From 0 to n matches */
+  OP_MINUPTO,        /* 31 */
+  OP_EXACT,          /* 32 Exactly n matches */
+
+  OP_NOTSTAR,        /* 33 The maximizing and minimizing versions of */
+  OP_NOTMINSTAR,     /* 34 all these opcodes must come in pairs, with */
+  OP_NOTPLUS,        /* 35 the minimizing one second. */
+  OP_NOTMINPLUS,     /* 36 This set applies to "not" single characters */
+  OP_NOTQUERY,       /* 37 */
+  OP_NOTMINQUERY,    /* 38 */
+  OP_NOTUPTO,        /* 39 From 0 to n matches */
+  OP_NOTMINUPTO,     /* 40 */
+  OP_NOTEXACT,       /* 41 Exactly n matches */
+
+  OP_TYPESTAR,       /* 42 The maximizing and minimizing versions of */
+  OP_TYPEMINSTAR,    /* 43 all these opcodes must come in pairs, with */
+  OP_TYPEPLUS,       /* 44 the minimizing one second. These codes must */
+  OP_TYPEMINPLUS,    /* 45 be in exactly the same order as those above. */
+  OP_TYPEQUERY,      /* 46 This set applies to character types such as \d */
+  OP_TYPEMINQUERY,   /* 47 */
+  OP_TYPEUPTO,       /* 48 From 0 to n matches */
+  OP_TYPEMINUPTO,    /* 49 */
+  OP_TYPEEXACT,      /* 50 Exactly n matches */
+
+  OP_CRSTAR,         /* 51 The maximizing and minimizing versions of */
+  OP_CRMINSTAR,      /* 52 all these opcodes must come in pairs, with */
+  OP_CRPLUS,         /* 53 the minimizing one second. These codes must */
+  OP_CRMINPLUS,      /* 54 be in exactly the same order as those above. */
+  OP_CRQUERY,        /* 55 These are for character classes and back refs */
+  OP_CRMINQUERY,     /* 56 */
+  OP_CRRANGE,        /* 57 These are different to the three sets above. */
+  OP_CRMINRANGE,     /* 58 */
+
+  OP_CLASS,          /* 59 Match a character class, chars < 256 only */
+  OP_NCLASS,         /* 60 Same, but the bitmap was created from a negative
+                           class - the difference is relevant only when a UTF-8
+                           character > 255 is encountered. */
+
+  OP_XCLASS,         /* 61 Extended class for handling UTF-8 chars within the
+                           class. This does both positive and negative. */
+
+  OP_REF,            /* 62 Match a back reference */
+  OP_RECURSE,        /* 63 Match a numbered subpattern (possibly recursive) */
+  OP_CALLOUT,        /* 64 Call out to external function if provided */
+
+  OP_ALT,            /* 65 Start of alternation */
+  OP_KET,            /* 66 End of group that doesn't have an unbounded repeat */
+  OP_KETRMAX,        /* 67 These two must remain together and in this */
+  OP_KETRMIN,        /* 68 order. They are for groups the repeat for ever. */
+
+  /* The assertions must come before ONCE and COND */
+
+  OP_ASSERT,         /* 69 Positive lookahead */
+  OP_ASSERT_NOT,     /* 70 Negative lookahead */
+  OP_ASSERTBACK,     /* 71 Positive lookbehind */
+  OP_ASSERTBACK_NOT, /* 72 Negative lookbehind */
+  OP_REVERSE,        /* 73 Move pointer back - used in lookbehind assertions */
+
+  /* ONCE and COND must come after the assertions, with ONCE first, as there's
+  a test for >= ONCE for a subpattern that isn't an assertion. */
+
+  OP_ONCE,           /* 74 Once matched, don't back up into the subpattern */
+  OP_COND,           /* 75 Conditional group */
+  OP_CREF,           /* 76 Used to hold an extraction string number (cond ref) */
+
+  OP_BRAZERO,        /* 77 These two must remain together and in this */
+  OP_BRAMINZERO,     /* 78 order. */
+
+  OP_BRANUMBER,      /* 79 Used for extracting brackets whose number is greater
+                           than can fit into an opcode. */
+
+  OP_BRA             /* 80 This and greater values are used for brackets that
+                           extract substrings up to EXTRACT_BASIC_MAX. After
+                           that, use is made of OP_BRANUMBER. */
+};
+
+/* WARNING WARNING WARNING: There is an implicit assumption in pcre.c and
+study.c that all opcodes are less than 128 in value. This makes handling UTF-8
+character sequences easier. */
+
+/* The highest extraction number before we have to start using additional
+bytes. (Originally PCRE didn't have support for extraction counts highter than
+this number.) The value is limited by the number of opcodes left after OP_BRA,
+i.e. 255 - OP_BRA. We actually set it a bit lower to leave room for additional
+opcodes. */
+
+#define EXTRACT_BASIC_MAX  100
+
+
+/* This macro defines textual names for all the opcodes. These are used only
+for debugging. The macro is referenced only in pcre_printint.c. */
+
+#define OP_NAME_LIST \
+  "End", "\\A", "\\G", "\\B", "\\b", "\\D", "\\d",                \
+  "\\S", "\\s", "\\W", "\\w", "Any", "Anybyte",                   \
+  "notprop", "prop", "extuni",                                    \
+  "\\Z", "\\z",                                                   \
+  "Opt", "^", "$", "char", "charnc", "not",                       \
+  "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \
+  "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \
+  "*", "*?", "+", "+?", "?", "??", "{", "{", "{",                 \
+  "*", "*?", "+", "+?", "?", "??", "{", "{",                      \
+  "class", "nclass", "xclass", "Ref", "Recurse", "Callout",       \
+  "Alt", "Ket", "KetRmax", "KetRmin", "Assert", "Assert not",     \
+  "AssertB", "AssertB not", "Reverse", "Once", "Cond", "Cond ref",\
+  "Brazero", "Braminzero", "Branumber", "Bra"
+
+
+/* This macro defines the length of fixed length operations in the compiled
+regex. The lengths are used when searching for specific things, and also in the
+debugging printing of a compiled regex. We use a macro so that it can be
+defined close to the definitions of the opcodes themselves.
+
+As things have been extended, some of these are no longer fixed lenths, but are
+minima instead. For example, the length of a single-character repeat may vary
+in UTF-8 mode. The code that uses this table must know about such things. */
+
+#define OP_LENGTHS \
+  1,                             /* End                                    */ \
+  1, 1, 1, 1, 1, 1, 1, 1, 1, 1,  /* \A, \G, \B, \B, \D, \d, \S, \s, \W, \w */ \
+  1, 1,                          /* Any, Anybyte                           */ \
+  2, 2, 1,                       /* NOTPROP, PROP, EXTUNI                  */ \
+  1, 1, 2, 1, 1,                 /* \Z, \z, Opt, ^, $                      */ \
+  2,                             /* Char  - the minimum length             */ \
+  2,                             /* Charnc  - the minimum length           */ \
+  2,                             /* not                                    */ \
+  /* Positive single-char repeats                            ** These are  */ \
+  2, 2, 2, 2, 2, 2,              /* *, *?, +, +?, ?, ??      ** minima in  */ \
+  4, 4, 4,                       /* upto, minupto, exact     ** UTF-8 mode */ \
+  /* Negative single-char repeats - only for chars < 256                   */ \
+  2, 2, 2, 2, 2, 2,              /* NOT *, *?, +, +?, ?, ??                */ \
+  4, 4, 4,                       /* NOT upto, minupto, exact               */ \
+  /* Positive type repeats                                                 */ \
+  2, 2, 2, 2, 2, 2,              /* Type *, *?, +, +?, ?, ??               */ \
+  4, 4, 4,                       /* Type upto, minupto, exact              */ \
+  /* Character class & ref repeats                                         */ \
+  1, 1, 1, 1, 1, 1,              /* *, *?, +, +?, ?, ??                    */ \
+  5, 5,                          /* CRRANGE, CRMINRANGE                    */ \
+ 33,                             /* CLASS                                  */ \
+ 33,                             /* NCLASS                                 */ \
+  0,                             /* XCLASS - variable length               */ \
+  3,                             /* REF                                    */ \
+  1+LINK_SIZE,                   /* RECURSE                                */ \
+  2+2*LINK_SIZE,                 /* CALLOUT                                */ \
+  1+LINK_SIZE,                   /* Alt                                    */ \
+  1+LINK_SIZE,                   /* Ket                                    */ \
+  1+LINK_SIZE,                   /* KetRmax                                */ \
+  1+LINK_SIZE,                   /* KetRmin                                */ \
+  1+LINK_SIZE,                   /* Assert                                 */ \
+  1+LINK_SIZE,                   /* Assert not                             */ \
+  1+LINK_SIZE,                   /* Assert behind                          */ \
+  1+LINK_SIZE,                   /* Assert behind not                      */ \
+  1+LINK_SIZE,                   /* Reverse                                */ \
+  1+LINK_SIZE,                   /* Once                                   */ \
+  1+LINK_SIZE,                   /* COND                                   */ \
+  3,                             /* CREF                                   */ \
+  1, 1,                          /* BRAZERO, BRAMINZERO                    */ \
+  3,                             /* BRANUMBER                              */ \
+  1+LINK_SIZE                    /* BRA                                    */ \
+
+
+/* A magic value for OP_CREF to indicate the "in recursion" condition. */
+
+#define CREF_RECURSE  0xffff
+
+/* Error code numbers. They are given names so that they can more easily be
+tracked. */
+
+enum { ERR0,  ERR1,  ERR2,  ERR3,  ERR4,  ERR5,  ERR6,  ERR7,  ERR8,  ERR9,
+       ERR10, ERR11, ERR12, ERR13, ERR14, ERR15, ERR16, ERR17, ERR18, ERR19,
+       ERR20, ERR21, ERR22, ERR23, ERR24, ERR25, ERR26, ERR27, ERR28, ERR29,
+       ERR30, ERR31, ERR32, ERR33, ERR34, ERR35, ERR36, ERR37, ERR38, ERR39,
+       ERR40, ERR41, ERR42, ERR43, ERR44, ERR45, ERR46, ERR47 };
+
+/* The real format of the start of the pcre block; the index of names and the
+code vector run on as long as necessary after the end. We store an explicit
+offset to the name table so that if a regex is compiled on one host, saved, and
+then run on another where the size of pointers is different, all might still
+be well. For the case of compiled-on-4 and run-on-8, we include an extra
+pointer that is always NULL. For future-proofing, a few dummy fields were
+originally included - even though you can never get this planning right - but
+there is only one left now.
+
+NOTE NOTE NOTE:
+Because people can now save and re-use compiled patterns, any additions to this
+structure should be made at the end, and something earlier (e.g. a new
+flag in the options or one of the dummy fields) should indicate that the new
+fields are present. Currently PCRE always sets the dummy fields to zero.
+NOTE NOTE NOTE:
+*/
+
+typedef struct real_pcre {
+  pcre_uint32 magic_number;
+  pcre_uint32 size;               /* Total that was malloced */
+  pcre_uint32 options;
+  pcre_uint32 dummy1;             /* For future use, maybe */
+
+  pcre_uint16 top_bracket;
+  pcre_uint16 top_backref;
+  pcre_uint16 first_byte;
+  pcre_uint16 req_byte;
+  pcre_uint16 name_table_offset;  /* Offset to name table that follows */
+  pcre_uint16 name_entry_size;    /* Size of any name items */
+  pcre_uint16 name_count;         /* Number of name items */
+  pcre_uint16 ref_count;          /* Reference count */
+
+  const unsigned char *tables;    /* Pointer to tables or NULL for std */
+  const unsigned char *nullpad;   /* NULL padding */
+} real_pcre;
+
+/* The format of the block used to store data from pcre_study(). The same
+remark (see NOTE above) about extending this structure applies. */
+
+typedef struct pcre_study_data {
+  pcre_uint32 size;               /* Total that was malloced */
+  pcre_uint32 options;
+  uschar start_bits[32];
+} pcre_study_data;
+
+/* Structure for passing "static" information around between the functions
+doing the compiling, so that they are thread-safe. */
+
+typedef struct compile_data {
+  const uschar *lcc;            /* Points to lower casing table */
+  const uschar *fcc;            /* Points to case-flipping table */
+  const uschar *cbits;          /* Points to character type table */
+  const uschar *ctypes;         /* Points to table of type maps */
+  const uschar *start_code;     /* The start of the compiled code */
+  const uschar *start_pattern;  /* The start of the pattern */
+  uschar *name_table;           /* The name/number table */
+  int  names_found;             /* Number of entries so far */
+  int  name_entry_size;         /* Size of each entry */
+  int  top_backref;             /* Maximum back reference */
+  unsigned int backref_map;     /* Bitmap of low back refs */
+  int  req_varyopt;             /* "After variable item" flag for reqbyte */
+  BOOL nopartial;               /* Set TRUE if partial won't work */
+} compile_data;
+
+/* Structure for maintaining a chain of pointers to the currently incomplete
+branches, for testing for left recursion. */
+
+typedef struct branch_chain {
+  struct branch_chain *outer;
+  uschar *current;
+} branch_chain;
+
+/* Structure for items in a linked list that represents an explicit recursive
+call within the pattern. */
+
+typedef struct recursion_info {
+  struct recursion_info *prevrec; /* Previous recursion record (or NULL) */
+  int group_num;                /* Number of group that was called */
+  const uschar *after_call;     /* "Return value": points after the call in the expr */
+  const uschar *save_start;     /* Old value of md->start_match */
+  int *offset_save;             /* Pointer to start of saved offsets */
+  int saved_max;                /* Number of saved offsets */
+} recursion_info;
+
+/* When compiling in a mode that doesn't use recursive calls to match(),
+a structure is used to remember local variables on the heap. It is defined in
+pcre.c, close to the match() function, so that it is easy to keep it in step
+with any changes of local variable. However, the pointer to the current frame
+must be saved in some "static" place over a longjmp(). We declare the
+structure here so that we can put a pointer in the match_data structure.
+NOTE: This isn't used for a "normal" compilation of pcre. */
+
+struct heapframe;
+
+/* Structure for passing "static" information around between the functions
+doing traditional NFA matching, so that they are thread-safe. */
+
+typedef struct match_data {
+  unsigned long int match_call_count; /* As it says */
+  unsigned long int match_limit;/* As it says */
+  int   *offset_vector;         /* Offset vector */
+  int    offset_end;            /* One past the end */
+  int    offset_max;            /* The maximum usable for return data */
+  const uschar *lcc;            /* Points to lower casing table */
+  const uschar *ctypes;         /* Points to table of type maps */
+  BOOL   offset_overflow;       /* Set if too many extractions */
+  BOOL   notbol;                /* NOTBOL flag */
+  BOOL   noteol;                /* NOTEOL flag */
+  BOOL   utf8;                  /* UTF8 flag */
+  BOOL   endonly;               /* Dollar not before final \n */
+  BOOL   notempty;              /* Empty string match not wanted */
+  BOOL   partial;               /* PARTIAL flag */
+  BOOL   hitend;                /* Hit the end of the subject at some point */
+  const uschar *start_code;     /* For use when recursing */
+  const uschar *start_subject;  /* Start of the subject string */
+  const uschar *end_subject;    /* End of the subject string */
+  const uschar *start_match;    /* Start of this match attempt */
+  const uschar *end_match_ptr;  /* Subject position at end match */
+  int    end_offset_top;        /* Highwater mark at end of match */
+  int    capture_last;          /* Most recent capture number */
+  int    start_offset;          /* The start offset value */
+  recursion_info *recursive;    /* Linked list of recursion data */
+  void  *callout_data;          /* To pass back to callouts */
+  struct heapframe *thisframe;  /* Used only when compiling for no recursion */
+} match_data;
+
+/* A similar structure is used for the same purpose by the DFA matching
+functions. */
+
+typedef struct dfa_match_data {
+  const uschar *start_code;     /* Start of the compiled pattern */
+  const uschar *start_subject;  /* Start of the subject string */
+  const uschar *end_subject;    /* End of subject string */
+  const uschar *tables;         /* Character tables */
+  int   moptions;               /* Match options */
+  int   poptions;               /* Pattern options */
+  void  *callout_data;          /* To pass back to callouts */
+} dfa_match_data;
+
+/* Bit definitions for entries in the pcre_ctypes table. */
+
+#define ctype_space   0x01
+#define ctype_letter  0x02
+#define ctype_digit   0x04
+#define ctype_xdigit  0x08
+#define ctype_word    0x10   /* alphameric or '_' */
+#define ctype_meta    0x80   /* regexp meta char or zero (end pattern) */
+
+/* Offsets for the bitmap tables in pcre_cbits. Each table contains a set
+of bits for a class map. Some classes are built by combining these tables. */
+
+#define cbit_space     0      /* [:space:] or \s */
+#define cbit_xdigit   32      /* [:xdigit:] */
+#define cbit_digit    64      /* [:digit:] or \d */
+#define cbit_upper    96      /* [:upper:] */
+#define cbit_lower   128      /* [:lower:] */
+#define cbit_word    160      /* [:word:] or \w */
+#define cbit_graph   192      /* [:graph:] */
+#define cbit_print   224      /* [:print:] */
+#define cbit_punct   256      /* [:punct:] */
+#define cbit_cntrl   288      /* [:cntrl:] */
+#define cbit_length  320      /* Length of the cbits table */
+
+/* Offsets of the various tables from the base tables pointer, and
+total length. */
+
+#define lcc_offset      0
+#define fcc_offset    256
+#define cbits_offset  512
+#define ctypes_offset (cbits_offset + cbit_length)
+#define tables_length (ctypes_offset + 256)
+
+/* Layout of the UCP type table that translates property names into codes for
+ucp_findchar(). */
+
+typedef struct {
+  const char *name;
+  int value;
+} ucp_type_table;
+
+
+/* Internal shared data tables. These are tables that are used by more than one
+of the exported public functions. They have to be "external" in the C sense,
+but are not part of the PCRE public API. The data for these tables is in the
+pcre_tables.c module. */
+
+extern const int    _pcre_utf8_table1[];
+extern const int    _pcre_utf8_table2[];
+extern const int    _pcre_utf8_table3[];
+extern const uschar _pcre_utf8_table4[];
+
+extern const int    _pcre_utf8_table1_size;
+
+extern const ucp_type_table _pcre_utt[];
+extern const int _pcre_utt_size;
+
+extern const uschar _pcre_default_tables[];
+
+extern const uschar _pcre_OP_lengths[];
+
+
+/* Internal shared functions. These are functions that are used by more than
+one of the exported public functions. They have to be "external" in the C
+sense, but are not part of the PCRE public API. */
+
+extern int         _pcre_ord2utf8(int, uschar *);
+extern void        _pcre_printint(pcre *, FILE *);
+extern real_pcre * _pcre_try_flipped(const real_pcre *, real_pcre *,
+                     const pcre_study_data *, pcre_study_data *);
+extern int         _pcre_ucp_findchar(const int, int *, int *);
+extern int         _pcre_valid_utf8(const uschar *, int);
+extern BOOL        _pcre_xclass(int, const uschar *);
+
+/* End of pcre_internal.h */