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pcre2_compile.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
Original API code Copyright (c) 1997-2012 University of Cambridge
New API code Copyright (c) 2016-2017 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.
-----------------------------------------------------------------------------
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#define NLBLOCK cb /* Block containing newline information */
#define PSSTART start_pattern /* Field containing processed string start */
#define PSEND end_pattern /* Field containing processed string end */
#include "pcre2_internal.h"
/* In rare error cases debugging might require calling pcre2_printint(). */
#if 0
#ifdef EBCDIC
#define PRINTABLE(c) ((c) >= 64 && (c) < 255)
#else
#define PRINTABLE(c) ((c) >= 32 && (c) < 127)
#endif
#include "pcre2_printint.c"
#define DEBUG_CALL_PRINTINT
#endif
/* Other debugging code can be enabled by these defines. */
// #define DEBUG_SHOW_CAPTURES
// #define DEBUG_SHOW_PARSED
/* There are a few things that vary with different code unit sizes. Handle them
by defining macros in order to minimize #if usage. */
#if PCRE2_CODE_UNIT_WIDTH == 8
#define STRING_UTFn_RIGHTPAR STRING_UTF8_RIGHTPAR, 5
#define XDIGIT(c) xdigitab[c]
#else /* Either 16-bit or 32-bit */
#define XDIGIT(c) (MAX_255(c)? xdigitab[c] : 0xff)
#if PCRE2_CODE_UNIT_WIDTH == 16
#define STRING_UTFn_RIGHTPAR STRING_UTF16_RIGHTPAR, 6
#else /* 32-bit */
#define STRING_UTFn_RIGHTPAR STRING_UTF32_RIGHTPAR, 6
#endif
#endif
/* Macros to store and retrieve a PCRE2_SIZE value in the parsed pattern, which
consists of uint32_t elements. Assume that if uint32_t can't hold it, two of
them will be able to (i.e. assume a 64-bit world). */
#if PCRE2_SIZE_MAX <= UINT32_MAX
#define PUTOFFSET(s,p) *p++ = s
#define GETOFFSET(s,p) s = *p++
#define GETPLUSOFFSET(s,p) s = *(++p)
#define READPLUSOFFSET(s,p) s = p[1]
#define SKIPOFFSET(p) p++
#define SIZEOFFSET 1
#else
#define PUTOFFSET(s,p) \
{ *p++ = (uint32_t)(s >> 32); *p++ = (uint32_t)(s & 0xffffffff); }
#define GETOFFSET(s,p) \
{ s = ((PCRE2_SIZE)p[0] << 32) | (PCRE2_SIZE)p[1]; p += 2; }
#define GETPLUSOFFSET(s,p) \
{ s = ((PCRE2_SIZE)p[1] << 32) | (PCRE2_SIZE)p[2]; p += 2; }
#define READPLUSOFFSET(s,p) \
{ s = ((PCRE2_SIZE)p[1] << 32) | (PCRE2_SIZE)p[2]; }
#define SKIPOFFSET(p) p += 2
#define SIZEOFFSET 2
#endif
/* Macros for manipulating elements of the parsed pattern vector. */
#define META_CODE(x) (x & 0xffff0000u)
#define META_DATA(x) (x & 0x0000ffffu)
#define META_DIFF(x,y) ((x-y)>>16)
/* Function definitions to allow mutual recursion */
#ifdef SUPPORT_UNICODE
static unsigned int
add_list_to_class_internal(uint8_t *, PCRE2_UCHAR **, uint32_t,
compile_block *, const uint32_t *, unsigned int);
#endif
static int
compile_regex(uint32_t, PCRE2_UCHAR **, uint32_t **, int *, uint32_t,
uint32_t *, int32_t *, uint32_t *, int32_t *, branch_chain *,
compile_block *, PCRE2_SIZE *);
static int
get_branchlength(uint32_t **, int *, int *, parsed_recurse_check *,
compile_block *);
static BOOL
set_lookbehind_lengths(uint32_t **, int *, int *, parsed_recurse_check *,
compile_block *);
/*************************************************
* Code parameters and static tables *
*************************************************/
#define MAX_GROUP_NUMBER 65535u
#define MAX_REPEAT_COUNT 65535u
#define REPEAT_UNLIMITED (MAX_REPEAT_COUNT+1)
/* COMPILE_WORK_SIZE specifies the size of stack workspace, which is used in
different ways in the different pattern scans. The parsing and group-
identifying pre-scan uses it to handle nesting, and needs it to be 16-bit
aligned for this. Having defined the size in code units, we set up
C16_WORK_SIZE as the number of elements in the 16-bit vector.
During the first compiling phase, when determining how much memory is required,
the regex is partly compiled into this space, but the compiled parts are
discarded as soon as they can be, so that hopefully there will never be an
overrun. The code does, however, check for an overrun, which can occur for
pathological patterns. The size of the workspace depends on LINK_SIZE because
the length of compiled items varies with this.
In the real compile phase, this workspace is not currently used. */
#define COMPILE_WORK_SIZE (3000*LINK_SIZE) /* Size in code units */
#define C16_WORK_SIZE \
((COMPILE_WORK_SIZE * sizeof(PCRE2_UCHAR))/sizeof(uint16_t))
/* A uint32_t vector is used for caching information about the size of
capturing groups, to improve performance. A default is created on the stack of
this size. */
#define GROUPINFO_DEFAULT_SIZE 256
/* The overrun tests check for a slightly smaller size so that they detect the
overrun before it actually does run off the end of the data block. */
#define WORK_SIZE_SAFETY_MARGIN (100)
/* This value determines the size of the initial vector that is used for
remembering named groups during the pre-compile. It is allocated on the stack,
but if it is too small, it is expanded, in a similar way to the workspace. The
value is the number of slots in the list. */
#define NAMED_GROUP_LIST_SIZE 20
/* The pre-compiling pass over the pattern creates a parsed pattern in a vector
of uint32_t. For short patterns this lives on the stack, with this size. Heap
memory is used for longer patterns. */
#define PARSED_PATTERN_DEFAULT_SIZE 1024
/* Maximum length value to check against when making sure that the variable
that holds the compiled pattern length does not overflow. We make it a bit less
than INT_MAX to allow for adding in group terminating code units, so that we
don't have to check them every time. */
#define OFLOW_MAX (INT_MAX - 20)
/* Code values for parsed patterns, which are stored in a vector of 32-bit
unsigned ints. Values less than META_END are literal data values. The coding
for identifying the item is in the top 16-bits, leaving 16 bits for the
additional data that some of them need. The META_CODE, META_DATA, and META_DIFF
macros are used to manipulate parsed pattern elements.
NOTE: When these definitions are changed, the table of extra lengths for each
code (meta_extra_lengths, just below) must be updated to remain in step. */
#define META_END 0x80000000u /* End of pattern */
#define META_ALT 0x80010000u /* alternation */
#define META_ATOMIC 0x80020000u /* atomic group */
#define META_BACKREF 0x80030000u /* Back ref */
#define META_BACKREF_BYNAME 0x80040000u /* \k'name' */
#define META_BIGVALUE 0x80050000u /* Next is a literal > META_END */
#define META_CALLOUT_NUMBER 0x80060000u /* (?C with numerical argument */
#define META_CALLOUT_STRING 0x80070000u /* (?C with string argument */
#define META_CAPTURE 0x80080000u /* Capturing parenthesis */
#define META_CIRCUMFLEX 0x80090000u /* ^ metacharacter */
#define META_CLASS 0x800a0000u /* start non-empty class */
#define META_CLASS_EMPTY 0x800b0000u /* empty class */
#define META_CLASS_EMPTY_NOT 0x800c0000u /* negative empty class */
#define META_CLASS_END 0x800d0000u /* end of non-empty class */
#define META_CLASS_NOT 0x800e0000u /* start non-empty negative class */
#define META_COND_ASSERT 0x800f0000u /* (?(?assertion)... */
#define META_COND_DEFINE 0x80100000u /* (?(DEFINE)... */
#define META_COND_NAME 0x80110000u /* (?(<name>)... */
#define META_COND_NUMBER 0x80120000u /* (?(digits)... */
#define META_COND_RNAME 0x80130000u /* (?(R&name)... */
#define META_COND_RNUMBER 0x80140000u /* (?(Rdigits)... */
#define META_COND_VERSION 0x80150000u /* (?(VERSION<op>x.y)... */
#define META_DOLLAR 0x80160000u /* $ metacharacter */
#define META_DOT 0x80170000u /* . metacharacter */
#define META_ESCAPE 0x80180000u /* \d and friends */
#define META_KET 0x80190000u /* closing parenthesis */
#define META_NOCAPTURE 0x801a0000u /* no capture parens */
#define META_OPTIONS 0x801b0000u /* (?i) and friends */
#define META_POSIX 0x801c0000u /* POSIX class item */
#define META_POSIX_NEG 0x801d0000u /* negative POSIX class item */
#define META_RANGE_ESCAPED 0x801e0000u /* range with at least one escape */
#define META_RANGE_LITERAL 0x801f0000u /* range defined literally */
#define META_RECURSE 0x80200000u /* Recursion */
#define META_RECURSE_BYNAME 0x80210000u /* (?&name) */
/* These must be kept together to make it easy to check that an assertion
is present where expected in a conditional group. */
#define META_LOOKAHEAD 0x80220000u /* (?= */
#define META_LOOKAHEADNOT 0x80230000u /* (?! */
#define META_LOOKBEHIND 0x80240000u /* (?<= */
#define META_LOOKBEHINDNOT 0x80250000u /* (?<! */
/* These must be kept in this order, with consecutive values, and the _ARG
versions of PRUNE, SKIP, and THEN immediately after their non-argument
versions. */
#define META_MARK 0x80260000u /* (*MARK) */
#define META_ACCEPT 0x80270000u /* (*ACCEPT) */
#define META_COMMIT 0x80280000u /* (*COMMIT) */
#define META_FAIL 0x80290000u /* (*FAIL) */
#define META_PRUNE 0x802a0000u /* These pairs must */
#define META_PRUNE_ARG 0x802b0000u /* be */
#define META_SKIP 0x802c0000u /* kept */
#define META_SKIP_ARG 0x802d0000u /* in */
#define META_THEN 0x802e0000u /* this */
#define META_THEN_ARG 0x802f0000u /* order */
/* These must be kept in groups of adjacent 3 values, and all together. */
#define META_ASTERISK 0x80300000u /* * */
#define META_ASTERISK_PLUS 0x80310000u /* *+ */
#define META_ASTERISK_QUERY 0x80320000u /* *? */
#define META_PLUS 0x80330000u /* + */
#define META_PLUS_PLUS 0x80340000u /* ++ */
#define META_PLUS_QUERY 0x80350000u /* +? */
#define META_QUERY 0x80360000u /* ? */
#define META_QUERY_PLUS 0x80370000u /* ?+ */
#define META_QUERY_QUERY 0x80380000u /* ?? */
#define META_MINMAX 0x80390000u /* {n,m} repeat */
#define META_MINMAX_PLUS 0x803a0000u /* {n,m}+ repeat */
#define META_MINMAX_QUERY 0x803b0000u /* {n,m}? repeat */
#define META_FIRST_QUANTIFIER META_ASTERISK
#define META_LAST_QUANTIFIER META_MINMAX_QUERY
/* Table of extra lengths for each of the meta codes. Must be kept in step with
the definitions above. For some items these values are a basic length to which
a variable amount has to be added. */
static unsigned char meta_extra_lengths[] = {
0, /* META_END */
0, /* META_ALT */
0, /* META_ATOMIC */
0, /* META_BACKREF - more if group is >= 10 */
1+SIZEOFFSET, /* META_BACKREF_BYNAME */
1, /* META_BIGVALUE */
3, /* META_CALLOUT_NUMBER */
3+SIZEOFFSET, /* META_CALLOUT_STRING */
0, /* META_CAPTURE */
0, /* META_CIRCUMFLEX */
0, /* META_CLASS */
0, /* META_CLASS_EMPTY */
0, /* META_CLASS_EMPTY_NOT */
0, /* META_CLASS_END */
0, /* META_CLASS_NOT */
0, /* META_COND_ASSERT */
SIZEOFFSET, /* META_COND_DEFINE */
1+SIZEOFFSET, /* META_COND_NAME */
1+SIZEOFFSET, /* META_COND_NUMBER */
1+SIZEOFFSET, /* META_COND_RNAME */
1+SIZEOFFSET, /* META_COND_RNUMBER */
3, /* META_COND_VERSION */
0, /* META_DOLLAR */
0, /* META_DOT */
0, /* META_ESCAPE - more for ESC_P, ESC_p, ESC_g, ESC_k */
0, /* META_KET */
0, /* META_NOCAPTURE */
1, /* META_OPTIONS */
1, /* META_POSIX */
1, /* META_POSIX_NEG */
0, /* META_RANGE_ESCAPED */
0, /* META_RANGE_LITERAL */
SIZEOFFSET, /* META_RECURSE */
1+SIZEOFFSET, /* META_RECURSE_BYNAME */
0, /* META_LOOKAHEAD */
0, /* META_LOOKAHEADNOT */
SIZEOFFSET, /* META_LOOKBEHIND */
SIZEOFFSET, /* META_LOOKBEHINDNOT */
1, /* META_MARK - plus the string length */
0, /* META_ACCEPT */
0, /* META_COMMIT */
0, /* META_FAIL */
0, /* META_PRUNE */
1, /* META_PRUNE_ARG - plus the string length */
0, /* META_SKIP */
1, /* META_SKIP_ARG - plus the string length */
0, /* META_THEN */
1, /* META_THEN_ARG - plus the string length */
0, /* META_ASTERISK */
0, /* META_ASTERISK_PLUS */
0, /* META_ASTERISK_QUERY */
0, /* META_PLUS */
0, /* META_PLUS_PLUS */
0, /* META_PLUS_QUERY */
0, /* META_QUERY */
0, /* META_QUERY_PLUS */
0, /* META_QUERY_QUERY */
2, /* META_MINMAX */
2, /* META_MINMAX_PLUS */
2 /* META_MINMAX_QUERY */
};
/* Types for skipping parts of a parsed pattern. */
enum { PSKIP_ALT, PSKIP_CLASS, PSKIP_KET };
/* Macro for setting individual bits in class bitmaps. It took some
experimenting to figure out how to stop gcc 5.3.0 from warning with
-Wconversion. This version gets a warning:
#define SETBIT(a,b) a[(b)/8] |= (uint8_t)(1 << ((b)&7))
Let's hope the apparently less efficient version isn't actually so bad if the
compiler is clever with identical subexpressions. */
#define SETBIT(a,b) a[(b)/8] = (uint8_t)(a[(b)/8] | (1 << ((b)&7)))
/* Private flags added to firstcu and reqcu. */
#define REQ_CASELESS (1 << 0) /* Indicates caselessness */
#define REQ_VARY (1 << 1) /* reqcu followed non-literal item */
/* Negative values for the firstcu and reqcu flags */
#define REQ_UNSET (-2) /* Not yet found anything */
#define REQ_NONE (-1) /* Found not fixed char */
/* These flags are used in the groupinfo vector. */
#define GI_SET_FIXED_LENGTH 0x80000000u
#define GI_NOT_FIXED_LENGTH 0x40000000u
#define GI_FIXED_LENGTH_MASK 0x0000ffffu
/* This simple test for a decimal digit works for both ASCII/Unicode and EBCDIC
and is fast (a good compiler can turn it into a subtraction and unsigned
comparison). */
#define IS_DIGIT(x) ((x) >= CHAR_0 && (x) <= CHAR_9)
/* Table to identify hex digits. The tables in chartables are dependent on the
locale, and may mark arbitrary characters as digits. We want to recognize only
0-9, a-z, and A-Z as hex digits, which is why we have a private table here. It
costs 256 bytes, but it is a lot faster than doing character value tests (at
least in some simple cases I timed), and in some applications one wants PCRE2
to compile efficiently as well as match efficiently. The value in the table is
the binary hex digit value, or 0xff for non-hex digits. */
/* This is the "normal" case, for ASCII systems, and EBCDIC systems running in
UTF-8 mode. */
#ifndef EBCDIC
static const uint8_t xdigitab[] =
{
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0- 7 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 8- 15 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 16- 23 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 24- 31 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* - ' */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* ( - / */
0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07, /* 0 - 7 */
0x08,0x09,0xff,0xff,0xff,0xff,0xff,0xff, /* 8 - ? */
0xff,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0xff, /* @ - G */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* H - O */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* P - W */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* X - _ */
0xff,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0xff, /* ` - g */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* h - o */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* p - w */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* x -127 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 128-135 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 136-143 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 144-151 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 152-159 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 160-167 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 168-175 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 176-183 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 184-191 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 192-199 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 2ff-207 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 208-215 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 216-223 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 224-231 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 232-239 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 240-247 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff};/* 248-255 */
#else
/* This is the "abnormal" case, for EBCDIC systems not running in UTF-8 mode. */
static const uint8_t xdigitab[] =
{
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 0- 7 0 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 8- 15 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 16- 23 10 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 24- 31 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 32- 39 20 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 40- 47 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 48- 55 30 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 56- 63 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* - 71 40 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 72- | */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* & - 87 50 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 88- 95 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* - -103 60 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 104- ? */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 112-119 70 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 120- " */
0xff,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0xff, /* 128- g 80 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* h -143 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 144- p 90 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* q -159 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 160- x A0 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* y -175 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* ^ -183 B0 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* 184-191 */
0xff,0x0a,0x0b,0x0c,0x0d,0x0e,0x0f,0xff, /* { - G C0 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* H -207 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* } - P D0 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* Q -223 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* \ - X E0 */
0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff, /* Y -239 */
0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07, /* 0 - 7 F0 */
0x08,0x09,0xff,0xff,0xff,0xff,0xff,0xff};/* 8 -255 */
#endif /* EBCDIC */
/* Table for handling alphanumeric escaped characters. Positive returns are
simple data values; negative values are for special things like \d and so on.
Zero means further processing is needed (for things like \x), or the escape is
invalid. */
/* This is the "normal" table for ASCII systems or for EBCDIC systems running
in UTF-8 mode. It runs from '0' to 'z'. */
#ifndef EBCDIC
#define ESCAPES_FIRST CHAR_0
#define ESCAPES_LAST CHAR_z
#define UPPER_CASE(c) (c-32)
static const short int escapes[] = {
0, 0,
0, 0,
0, 0,
0, 0,
0, 0,
CHAR_COLON, CHAR_SEMICOLON,
CHAR_LESS_THAN_SIGN, CHAR_EQUALS_SIGN,
CHAR_GREATER_THAN_SIGN, CHAR_QUESTION_MARK,
CHAR_COMMERCIAL_AT, -ESC_A,
-ESC_B, -ESC_C,
-ESC_D, -ESC_E,
0, -ESC_G,
-ESC_H, 0,
0, -ESC_K,
0, 0,
-ESC_N, 0,
-ESC_P, -ESC_Q,
-ESC_R, -ESC_S,
0, 0,
-ESC_V, -ESC_W,
-ESC_X, 0,
-ESC_Z, CHAR_LEFT_SQUARE_BRACKET,
CHAR_BACKSLASH, CHAR_RIGHT_SQUARE_BRACKET,
CHAR_CIRCUMFLEX_ACCENT, CHAR_UNDERSCORE,
CHAR_GRAVE_ACCENT, ESC_a,
-ESC_b, 0,
-ESC_d, ESC_e,
ESC_f, 0,
-ESC_h, 0,
0, -ESC_k,
0, 0,
ESC_n, 0,
-ESC_p, 0,
ESC_r, -ESC_s,
ESC_tee, 0,
-ESC_v, -ESC_w,
0, 0,
-ESC_z
};
#else
/* This is the "abnormal" table for EBCDIC systems without UTF-8 support.
It runs from 'a' to '9'. For some minimal testing of EBCDIC features, the code
is sometimes compiled on an ASCII system. In this case, we must not use CHAR_a
because it is defined as 'a', which of course picks up the ASCII value. */
#if 'a' == 0x81 /* Check for a real EBCDIC environment */
#define ESCAPES_FIRST CHAR_a
#define ESCAPES_LAST CHAR_9
#define UPPER_CASE(c) (c+64)
#else /* Testing in an ASCII environment */
#define ESCAPES_FIRST ((unsigned char)'\x81') /* EBCDIC 'a' */
#define ESCAPES_LAST ((unsigned char)'\xf9') /* EBCDIC '9' */
#define UPPER_CASE(c) (c-32)
#endif
static const short int escapes[] = {
/* 80 */ ESC_a, -ESC_b, 0, -ESC_d, ESC_e, ESC_f, 0,
/* 88 */-ESC_h, 0, 0, '{', 0, 0, 0, 0,
/* 90 */ 0, 0, -ESC_k, 0, 0, ESC_n, 0, -ESC_p,
/* 98 */ 0, ESC_r, 0, '}', 0, 0, 0, 0,
/* A0 */ 0, '~', -ESC_s, ESC_tee, 0,-ESC_v, -ESC_w, 0,
/* A8 */ 0,-ESC_z, 0, 0, 0, '[', 0, 0,
/* B0 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* B8 */ 0, 0, 0, 0, 0, ']', '=', '-',
/* C0 */ '{',-ESC_A, -ESC_B, -ESC_C, -ESC_D,-ESC_E, 0, -ESC_G,
/* C8 */-ESC_H, 0, 0, 0, 0, 0, 0, 0,
/* D0 */ '}', 0, -ESC_K, 0, 0,-ESC_N, 0, -ESC_P,
/* D8 */-ESC_Q,-ESC_R, 0, 0, 0, 0, 0, 0,
/* E0 */ '\\', 0, -ESC_S, 0, 0,-ESC_V, -ESC_W, -ESC_X,
/* E8 */ 0,-ESC_Z, 0, 0, 0, 0, 0, 0,
/* F0 */ 0, 0, 0, 0, 0, 0, 0, 0,
/* F8 */ 0, 0
};
/* We also need a table of characters that may follow \c in an EBCDIC
environment for characters 0-31. */
static unsigned char ebcdic_escape_c[] = "@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_";
#endif /* EBCDIC */
/* Table of special "verbs" like (*PRUNE). This is a short table, so it is
searched linearly. Put all the names into a single string, in order to reduce
the number of relocations when a shared library is dynamically linked. The
string is built from string macros so that it works in UTF-8 mode on EBCDIC
platforms. */
typedef struct verbitem {
unsigned int len; /* Length of verb name */
uint32_t meta; /* Base META_ code */
int has_arg; /* Argument requirement */
} verbitem;
static const char verbnames[] =
"\0" /* Empty name is a shorthand for MARK */
STRING_MARK0
STRING_ACCEPT0
STRING_COMMIT0
STRING_F0
STRING_FAIL0
STRING_PRUNE0
STRING_SKIP0
STRING_THEN;
static const verbitem verbs[] = {
{ 0, META_MARK, +1 }, /* > 0 => must have an argument */
{ 4, META_MARK, +1 },
{ 6, META_ACCEPT, -1 }, /* < 0 => must not have an argument */
{ 6, META_COMMIT, -1 },
{ 1, META_FAIL, -1 },
{ 4, META_FAIL, -1 },
{ 5, META_PRUNE, 0 }, /* Argument is optional; bump META code if found */
{ 4, META_SKIP, 0 },
{ 4, META_THEN, 0 }
};
static const int verbcount = sizeof(verbs)/sizeof(verbitem);
/* Verb opcodes, indexed by their META code offset from META_MARK. */
static const uint32_t verbops[] = {
OP_MARK, OP_ACCEPT, OP_COMMIT, OP_FAIL, OP_PRUNE, OP_PRUNE_ARG, OP_SKIP,
OP_SKIP_ARG, OP_THEN, OP_THEN_ARG };
/* Offsets from OP_STAR for case-independent and negative repeat opcodes. */
static uint32_t chartypeoffset[] = {
OP_STAR - OP_STAR, OP_STARI - OP_STAR,
OP_NOTSTAR - OP_STAR, OP_NOTSTARI - OP_STAR };
/* Tables of names of POSIX character classes and their lengths. The names are
now all in a single string, to reduce the number of relocations when a shared
library is dynamically loaded. The list of lengths is terminated by a zero
length entry. The first three must be alpha, lower, upper, as this is assumed
for handling case independence. The indices for graph, print, and punct are
needed, so identify them. */
static const char posix_names[] =
STRING_alpha0 STRING_lower0 STRING_upper0 STRING_alnum0
STRING_ascii0 STRING_blank0 STRING_cntrl0 STRING_digit0
STRING_graph0 STRING_print0 STRING_punct0 STRING_space0
STRING_word0 STRING_xdigit;
static const uint8_t posix_name_lengths[] = {
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 6, 0 };
#define PC_GRAPH 8
#define PC_PRINT 9
#define PC_PUNCT 10
/* Table of class bit maps for each POSIX class. Each class is formed from a
base map, with an optional addition or removal of another map. Then, for some
classes, there is some additional tweaking: for [:blank:] the vertical space
characters are removed, and for [:alpha:] and [:alnum:] the underscore
character is removed. The triples in the table consist of the base map offset,
second map offset or -1 if no second map, and a non-negative value for map
addition or a negative value for map subtraction (if there are two maps). The
absolute value of the third field has these meanings: 0 => no tweaking, 1 =>
remove vertical space characters, 2 => remove underscore. */
static const int posix_class_maps[] = {
cbit_word, cbit_digit, -2, /* alpha */
cbit_lower, -1, 0, /* lower */
cbit_upper, -1, 0, /* upper */
cbit_word, -1, 2, /* alnum - word without underscore */
cbit_print, cbit_cntrl, 0, /* ascii */
cbit_space, -1, 1, /* blank - a GNU extension */
cbit_cntrl, -1, 0, /* cntrl */
cbit_digit, -1, 0, /* digit */
cbit_graph, -1, 0, /* graph */
cbit_print, -1, 0, /* print */
cbit_punct, -1, 0, /* punct */
cbit_space, -1, 0, /* space */
cbit_word, -1, 0, /* word - a Perl extension */
cbit_xdigit,-1, 0 /* xdigit */
};
#ifdef SUPPORT_UNICODE
/* The POSIX class Unicode property substitutes that are used in UCP mode must
be in the order of the POSIX class names, defined above. */
static int posix_substitutes[] = {
PT_GC, ucp_L, /* alpha */
PT_PC, ucp_Ll, /* lower */
PT_PC, ucp_Lu, /* upper */
PT_ALNUM, 0, /* alnum */
-1, 0, /* ascii, treat as non-UCP */
-1, 1, /* blank, treat as \h */
PT_PC, ucp_Cc, /* cntrl */
PT_PC, ucp_Nd, /* digit */
PT_PXGRAPH, 0, /* graph */
PT_PXPRINT, 0, /* print */
PT_PXPUNCT, 0, /* punct */
PT_PXSPACE, 0, /* space */ /* Xps is POSIX space, but from 8.34 */
PT_WORD, 0, /* word */ /* Perl and POSIX space are the same */
-1, 0 /* xdigit, treat as non-UCP */
};
#define POSIX_SUBSIZE (sizeof(posix_substitutes) / (2*sizeof(uint32_t)))
#endif /* SUPPORT_UNICODE */
/* Masks for checking option settings. When PCRE2_LITERAL is set, only a subset
are allowed. */
#define PUBLIC_LITERAL_COMPILE_OPTIONS \
(PCRE2_ANCHORED|PCRE2_AUTO_CALLOUT|PCRE2_CASELESS|PCRE2_ENDANCHORED| \
PCRE2_FIRSTLINE|PCRE2_LITERAL|PCRE2_NO_START_OPTIMIZE| \
PCRE2_NO_UTF_CHECK|PCRE2_USE_OFFSET_LIMIT|PCRE2_UTF)
#define PUBLIC_COMPILE_OPTIONS \
(PUBLIC_LITERAL_COMPILE_OPTIONS| \
PCRE2_ALLOW_EMPTY_CLASS|PCRE2_ALT_BSUX|PCRE2_ALT_CIRCUMFLEX| \
PCRE2_ALT_VERBNAMES|PCRE2_DOLLAR_ENDONLY|PCRE2_DOTALL|PCRE2_DUPNAMES| \
PCRE2_EXTENDED|PCRE2_EXTENDED_MORE|PCRE2_MATCH_UNSET_BACKREF| \
PCRE2_MULTILINE|PCRE2_NEVER_BACKSLASH_C|PCRE2_NEVER_UCP| \
PCRE2_NEVER_UTF|PCRE2_NO_AUTO_CAPTURE|PCRE2_NO_AUTO_POSSESS| \
PCRE2_NO_DOTSTAR_ANCHOR|PCRE2_UCP|PCRE2_UNGREEDY)
#define PUBLIC_LITERAL_COMPILE_EXTRA_OPTIONS \
(PCRE2_EXTRA_MATCH_LINE|PCRE2_EXTRA_MATCH_WORD)
#define PUBLIC_COMPILE_EXTRA_OPTIONS \
(PUBLIC_LITERAL_COMPILE_EXTRA_OPTIONS| \
PCRE2_EXTRA_ALLOW_SURROGATE_ESCAPES|PCRE2_EXTRA_BAD_ESCAPE_IS_LITERAL)
/* Compile time error code numbers. They are given names so that they can more
easily be tracked. When a new number is added, the tables called eint1 and
eint2 in pcre2posix.c may need to be updated, and a new error text must be
added to compile_error_texts in pcre2_error.c. */
enum { ERR0 = COMPILE_ERROR_BASE,
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, ERR48, ERR49, ERR50,
ERR51, ERR52, ERR53, ERR54, ERR55, ERR56, ERR57, ERR58, ERR59, ERR60,
ERR61, ERR62, ERR63, ERR64, ERR65, ERR66, ERR67, ERR68, ERR69, ERR70,
ERR71, ERR72, ERR73, ERR74, ERR75, ERR76, ERR77, ERR78, ERR79, ERR80,
ERR81, ERR82, ERR83, ERR84, ERR85, ERR86, ERR87, ERR88, ERR89, ERR90,
ERR91, ERR92};
/* This is a table of start-of-pattern options such as (*UTF) and settings such
as (*LIMIT_MATCH=nnnn) and (*CRLF). For completeness and backward
compatibility, (*UTFn) is supported in the relevant libraries, but (*UTF) is
generic and always supported. */
enum { PSO_OPT, /* Value is an option bit */
PSO_FLG, /* Value is a flag bit */
PSO_NL, /* Value is a newline type */
PSO_BSR, /* Value is a \R type */
PSO_LIMH, /* Read integer value for heap limit */
PSO_LIMM, /* Read integer value for match limit */
PSO_LIMD }; /* Read integer value for depth limit */
typedef struct pso {
const uint8_t *name;
uint16_t length;
uint16_t type;
uint32_t value;
} pso;
/* NB: STRING_UTFn_RIGHTPAR contains the length as well */
static pso pso_list[] = {
{ (uint8_t *)STRING_UTFn_RIGHTPAR, PSO_OPT, PCRE2_UTF },
{ (uint8_t *)STRING_UTF_RIGHTPAR, 4, PSO_OPT, PCRE2_UTF },
{ (uint8_t *)STRING_UCP_RIGHTPAR, 4, PSO_OPT, PCRE2_UCP },
{ (uint8_t *)STRING_NOTEMPTY_RIGHTPAR, 9, PSO_FLG, PCRE2_NOTEMPTY_SET },
{ (uint8_t *)STRING_NOTEMPTY_ATSTART_RIGHTPAR, 17, PSO_FLG, PCRE2_NE_ATST_SET },
{ (uint8_t *)STRING_NO_AUTO_POSSESS_RIGHTPAR, 16, PSO_OPT, PCRE2_NO_AUTO_POSSESS },
{ (uint8_t *)STRING_NO_DOTSTAR_ANCHOR_RIGHTPAR, 18, PSO_OPT, PCRE2_NO_DOTSTAR_ANCHOR },
{ (uint8_t *)STRING_NO_JIT_RIGHTPAR, 7, PSO_FLG, PCRE2_NOJIT },
{ (uint8_t *)STRING_NO_START_OPT_RIGHTPAR, 13, PSO_OPT, PCRE2_NO_START_OPTIMIZE },
{ (uint8_t *)STRING_LIMIT_HEAP_EQ, 11, PSO_LIMH, 0 },
{ (uint8_t *)STRING_LIMIT_MATCH_EQ, 12, PSO_LIMM, 0 },
{ (uint8_t *)STRING_LIMIT_DEPTH_EQ, 12, PSO_LIMD, 0 },
{ (uint8_t *)STRING_LIMIT_RECURSION_EQ, 16, PSO_LIMD, 0 },
{ (uint8_t *)STRING_CR_RIGHTPAR, 3, PSO_NL, PCRE2_NEWLINE_CR },
{ (uint8_t *)STRING_LF_RIGHTPAR, 3, PSO_NL, PCRE2_NEWLINE_LF },
{ (uint8_t *)STRING_CRLF_RIGHTPAR, 5, PSO_NL, PCRE2_NEWLINE_CRLF },
{ (uint8_t *)STRING_ANY_RIGHTPAR, 4, PSO_NL, PCRE2_NEWLINE_ANY },
{ (uint8_t *)STRING_NUL_RIGHTPAR, 4, PSO_NL, PCRE2_NEWLINE_NUL },
{ (uint8_t *)STRING_ANYCRLF_RIGHTPAR, 8, PSO_NL, PCRE2_NEWLINE_ANYCRLF },
{ (uint8_t *)STRING_BSR_ANYCRLF_RIGHTPAR, 12, PSO_BSR, PCRE2_BSR_ANYCRLF },
{ (uint8_t *)STRING_BSR_UNICODE_RIGHTPAR, 12, PSO_BSR, PCRE2_BSR_UNICODE }
};
/* This table is used when converting repeating opcodes into possessified
versions as a result of an explicit possessive quantifier such as ++. A zero
value means there is no possessified version - in those cases the item in
question must be wrapped in ONCE brackets. The table is truncated at OP_CALLOUT
because all relevant opcodes are less than that. */
static const uint8_t opcode_possessify[] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0 - 15 */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 16 - 31 */
0, /* NOTI */
OP_POSSTAR, 0, /* STAR, MINSTAR */
OP_POSPLUS, 0, /* PLUS, MINPLUS */
OP_POSQUERY, 0, /* QUERY, MINQUERY */
OP_POSUPTO, 0, /* UPTO, MINUPTO */
0, /* EXACT */
0, 0, 0, 0, /* POS{STAR,PLUS,QUERY,UPTO} */
OP_POSSTARI, 0, /* STARI, MINSTARI */
OP_POSPLUSI, 0, /* PLUSI, MINPLUSI */
OP_POSQUERYI, 0, /* QUERYI, MINQUERYI */
OP_POSUPTOI, 0, /* UPTOI, MINUPTOI */
0, /* EXACTI */
0, 0, 0, 0, /* POS{STARI,PLUSI,QUERYI,UPTOI} */
OP_NOTPOSSTAR, 0, /* NOTSTAR, NOTMINSTAR */
OP_NOTPOSPLUS, 0, /* NOTPLUS, NOTMINPLUS */
OP_NOTPOSQUERY, 0, /* NOTQUERY, NOTMINQUERY */
OP_NOTPOSUPTO, 0, /* NOTUPTO, NOTMINUPTO */
0, /* NOTEXACT */
0, 0, 0, 0, /* NOTPOS{STAR,PLUS,QUERY,UPTO} */
OP_NOTPOSSTARI, 0, /* NOTSTARI, NOTMINSTARI */
OP_NOTPOSPLUSI, 0, /* NOTPLUSI, NOTMINPLUSI */
OP_NOTPOSQUERYI, 0, /* NOTQUERYI, NOTMINQUERYI */
OP_NOTPOSUPTOI, 0, /* NOTUPTOI, NOTMINUPTOI */
0, /* NOTEXACTI */
0, 0, 0, 0, /* NOTPOS{STARI,PLUSI,QUERYI,UPTOI} */
OP_TYPEPOSSTAR, 0, /* TYPESTAR, TYPEMINSTAR */
OP_TYPEPOSPLUS, 0, /* TYPEPLUS, TYPEMINPLUS */
OP_TYPEPOSQUERY, 0, /* TYPEQUERY, TYPEMINQUERY */
OP_TYPEPOSUPTO, 0, /* TYPEUPTO, TYPEMINUPTO */
0, /* TYPEEXACT */
0, 0, 0, 0, /* TYPEPOS{STAR,PLUS,QUERY,UPTO} */
OP_CRPOSSTAR, 0, /* CRSTAR, CRMINSTAR */
OP_CRPOSPLUS, 0, /* CRPLUS, CRMINPLUS */
OP_CRPOSQUERY, 0, /* CRQUERY, CRMINQUERY */
OP_CRPOSRANGE, 0, /* CRRANGE, CRMINRANGE */
0, 0, 0, 0, /* CRPOS{STAR,PLUS,QUERY,RANGE} */
0, 0, 0, /* CLASS, NCLASS, XCLASS */
0, 0, /* REF, REFI */
0, 0, /* DNREF, DNREFI */
0, 0 /* RECURSE, CALLOUT */
};
#ifdef DEBUG_SHOW_PARSED
/*************************************************
* Show the parsed pattern for debugging *
*************************************************/
/* For debugging the pre-scan, this code, which outputs the parsed data vector,
can be enabled. */
static void show_parsed(compile_block *cb)
{
uint32_t *pptr = cb->parsed_pattern;
for (;;)
{
int max, min;
PCRE2_SIZE offset;
uint32_t i;
uint32_t length;
uint32_t meta_arg = META_DATA(*pptr);
fprintf(stderr, "+++ %02d %.8x ", (int)(pptr - cb->parsed_pattern), *pptr);
if (*pptr < META_END)
{
if (*pptr > 32 && *pptr < 128) fprintf(stderr, "%c", *pptr);
pptr++;
}
else switch (META_CODE(*pptr++))
{
default:
fprintf(stderr, "**** OOPS - unknown META value - giving up ****\n");
return;
case META_END:
fprintf(stderr, "META_END\n");
return;
case META_CAPTURE:
fprintf(stderr, "META_CAPTURE %d", meta_arg);
break;
case META_RECURSE:
GETOFFSET(offset, pptr);
fprintf(stderr, "META_RECURSE %d %zd", meta_arg, offset);
break;
case META_BACKREF:
if (meta_arg < 10)
offset = cb->small_ref_offset[meta_arg];
else
GETOFFSET(offset, pptr);
fprintf(stderr, "META_BACKREF %d %zd", meta_arg, offset);
break;
case META_ESCAPE:
if (meta_arg == ESC_P || meta_arg == ESC_p)
{
uint32_t ptype = *pptr >> 16;
uint32_t pvalue = *pptr++ & 0xffff;
fprintf(stderr, "META \\%c %d %d", (meta_arg == ESC_P)? 'P':'p',
ptype, pvalue);
}
else
{
uint32_t cc;
/* There's just one escape we might have here that isn't negated in the
escapes table. */
if (meta_arg == ESC_g) cc = CHAR_g;
else for (cc = ESCAPES_FIRST; cc <= ESCAPES_LAST; cc++)
{
if (meta_arg == (uint32_t)(-escapes[cc - ESCAPES_FIRST])) break;
}
if (cc > ESCAPES_LAST) cc = CHAR_QUESTION_MARK;
fprintf(stderr, "META \\%c", cc);
}
break;
case META_MINMAX:
min = *pptr++;
max = *pptr++;
if (max != REPEAT_UNLIMITED)
fprintf(stderr, "META {%d,%d}", min, max);
else
fprintf(stderr, "META {%d,}", min);
break;
case META_MINMAX_QUERY:
min = *pptr++;
max = *pptr++;
if (max != REPEAT_UNLIMITED)
fprintf(stderr, "META {%d,%d}?", min, max);
else
fprintf(stderr, "META {%d,}?", min);
break;
case META_MINMAX_PLUS:
min = *pptr++;
max = *pptr++;
if (max != REPEAT_UNLIMITED)
fprintf(stderr, "META {%d,%d}+", min, max);
else
fprintf(stderr, "META {%d,}+", min);
break;
case META_BIGVALUE: fprintf(stderr, "META_BIGVALUE %.8x", *pptr++); break;
case META_CIRCUMFLEX: fprintf(stderr, "META_CIRCUMFLEX"); break;
case META_COND_ASSERT: fprintf(stderr, "META_COND_ASSERT"); break;
case META_DOLLAR: fprintf(stderr, "META_DOLLAR"); break;
case META_DOT: fprintf(stderr, "META_DOT"); break;
case META_ASTERISK: fprintf(stderr, "META *"); break;
case META_ASTERISK_QUERY: fprintf(stderr, "META *?"); break;
case META_ASTERISK_PLUS: fprintf(stderr, "META *+"); break;
case META_PLUS: fprintf(stderr, "META +"); break;
case META_PLUS_QUERY: fprintf(stderr, "META +?"); break;
case META_PLUS_PLUS: fprintf(stderr, "META ++"); break;
case META_QUERY: fprintf(stderr, "META ?"); break;
case META_QUERY_QUERY: fprintf(stderr, "META ??"); break;
case META_QUERY_PLUS: fprintf(stderr, "META ?+"); break;
case META_ATOMIC: fprintf(stderr, "META (?>"); break;
case META_NOCAPTURE: fprintf(stderr, "META (?:"); break;
case META_LOOKAHEAD: fprintf(stderr, "META (?="); break;
case META_LOOKAHEADNOT: fprintf(stderr, "META (?!"); break;
case META_KET: fprintf(stderr, "META )"); break;
case META_ALT: fprintf(stderr, "META | %d", meta_arg); break;
case META_CLASS: fprintf(stderr, "META ["); break;
case META_CLASS_NOT: fprintf(stderr, "META [^"); break;
case META_CLASS_END: fprintf(stderr, "META ]"); break;
case META_CLASS_EMPTY: fprintf(stderr, "META []"); break;
case META_CLASS_EMPTY_NOT: fprintf(stderr, "META [^]"); break;
case META_RANGE_LITERAL: fprintf(stderr, "META - (literal)"); break;
case META_RANGE_ESCAPED: fprintf(stderr, "META - (escaped)"); break;
case META_POSIX: fprintf(stderr, "META_POSIX %d", *pptr++); break;
case META_POSIX_NEG: fprintf(stderr, "META_POSIX_NEG %d", *pptr++); break;
case META_ACCEPT: fprintf(stderr, "META (*ACCEPT)"); break;
case META_COMMIT: fprintf(stderr, "META (*COMMIT)"); break;
case META_FAIL: fprintf(stderr, "META (*FAIL)"); break;
case META_PRUNE: fprintf(stderr, "META (*PRUNE)"); break;
case META_SKIP: fprintf(stderr, "META (*SKIP)"); break;
case META_THEN: fprintf(stderr, "META (*THEN)"); break;
case META_OPTIONS: fprintf(stderr, "META_OPTIONS 0x%02x", *pptr++); break;
case META_LOOKBEHIND:
fprintf(stderr, "META (?<= %d offset=", meta_arg);
GETOFFSET(offset, pptr);
fprintf(stderr, "%zd", offset);
break;
case META_LOOKBEHINDNOT:
fprintf(stderr, "META (?<! %d offset=", meta_arg);
GETOFFSET(offset, pptr);
fprintf(stderr, "%zd", offset);
break;
case META_CALLOUT_NUMBER:
fprintf(stderr, "META (?C%d) next=%d/%d", pptr[2], pptr[0],