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authorhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 01:45:08 -0500
committerhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 01:45:08 -0500
commite8ec7aa8e38a93f5b034ac74cebce5de23710317 (patch)
treeaa031937bf856c1f8d6ad7877b8d2cb0224da5ef /rubbos/app/httpd-2.0.64/srclib/pcre/internal.h
parentcc40af334e619bb549038238507407866f774f8f (diff)
upload http
JIRA: BOTTLENECK-10 Change-Id: I7598427ff904df438ce77c2819ee48ac75ffa8da Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
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+/*************************************************
+* Perl-Compatible Regular Expressions *
+*************************************************/
+
+
+/* This 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. See
+the file Tech.Notes for some information on the internals.
+
+Written by: Philip Hazel <ph10@cam.ac.uk>
+
+ Copyright (c) 1997-2001 University of Cambridge
+
+-----------------------------------------------------------------------------
+Permission is granted to anyone to use this software for any purpose on any
+computer system, and to redistribute it freely, subject to the following
+restrictions:
+
+1. This software is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+2. The origin of this software must not be misrepresented, either by
+ explicit claim or by omission.
+
+3. Altered versions must be plainly marked as such, and must not be
+ misrepresented as being the original software.
+
+4. If PCRE is embedded in any software that is released under the GNU
+ General Purpose Licence (GPL), then the terms of that licence shall
+ supersede any condition above with which it is incompatible.
+-----------------------------------------------------------------------------
+*/
+
+/* This header contains definitions that are shared between the different
+modules, but which are not relevant to the outside. */
+
+/* Get the definitions provided by running "configure" */
+
+#include "config.h"
+
+/* 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
+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
+#endif
+
+/* Standard C headers plus the external interface definition */
+
+#include <ctype.h>
+#include <limits.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "pcre.h"
+
+/* 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, though now that we have expanded
+to four bytes there is plenty of space. */
+
+#define PCRE_FIRSTSET 0x40000000 /* first_char is set */
+#define PCRE_REQCHSET 0x20000000 /* req_char is set */
+#define PCRE_STARTLINE 0x10000000 /* start after \n for multiline */
+#define PCRE_INGROUP 0x08000000 /* compiling inside a group */
+#define PCRE_ICHANGED 0x04000000 /* i option changes within 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 which 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)
+
+#define PUBLIC_EXEC_OPTIONS \
+ (PCRE_ANCHORED|PCRE_NOTBOL|PCRE_NOTEOL|PCRE_NOTEMPTY)
+
+#define PUBLIC_STUDY_OPTIONS 0 /* None defined */
+
+/* Magic number to provide a small check against being handed junk. */
+
+#define MAGIC_NUMBER 0x50435245UL /* 'PCRE' */
+
+/* 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
+
+#ifndef ESC_T
+#define ESC_T '\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. The final one must be ESC_REF as subsequent
+values are used for \1, \2, \3, etc. There is a test in the code for an escape
+greater than ESC_b and less than ESC_Z to detect the types that may be
+repeated. 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_B, ESC_b, ESC_D, ESC_d, ESC_S, ESC_s, ESC_W, ESC_w,
+ ESC_Z, ESC_z, ESC_REF };
+
+/* 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. */
+
+enum {
+ OP_END, /* End of pattern */
+
+ /* Values corresponding to backslashed metacharacters */
+
+ OP_SOD, /* Start of data: \A */
+ OP_NOT_WORD_BOUNDARY, /* \B */
+ OP_WORD_BOUNDARY, /* \b */
+ OP_NOT_DIGIT, /* \D */
+ OP_DIGIT, /* \d */
+ OP_NOT_WHITESPACE, /* \S */
+ OP_WHITESPACE, /* \s */
+ OP_NOT_WORDCHAR, /* \W */
+ OP_WORDCHAR, /* \w */
+ OP_EODN, /* End of data or \n at end of data: \Z. */
+ OP_EOD, /* End of data: \z */
+
+ OP_OPT, /* Set runtime options */
+ OP_CIRC, /* Start of line - varies with multiline switch */
+ OP_DOLL, /* End of line - varies with multiline switch */
+ OP_ANY, /* Match any character */
+ OP_CHARS, /* Match string of characters */
+ OP_NOT, /* Match anything but the following char */
+
+ OP_STAR, /* The maximizing and minimizing versions of */
+ OP_MINSTAR, /* all these opcodes must come in pairs, with */
+ OP_PLUS, /* the minimizing one second. */
+ OP_MINPLUS, /* This first set applies to single characters */
+ OP_QUERY,
+ OP_MINQUERY,
+ OP_UPTO, /* From 0 to n matches */
+ OP_MINUPTO,
+ OP_EXACT, /* Exactly n matches */
+
+ OP_NOTSTAR, /* The maximizing and minimizing versions of */
+ OP_NOTMINSTAR, /* all these opcodes must come in pairs, with */
+ OP_NOTPLUS, /* the minimizing one second. */
+ OP_NOTMINPLUS, /* This first set applies to "not" single characters */
+ OP_NOTQUERY,
+ OP_NOTMINQUERY,
+ OP_NOTUPTO, /* From 0 to n matches */
+ OP_NOTMINUPTO,
+ OP_NOTEXACT, /* Exactly n matches */
+
+ OP_TYPESTAR, /* The maximizing and minimizing versions of */
+ OP_TYPEMINSTAR, /* all these opcodes must come in pairs, with */
+ OP_TYPEPLUS, /* the minimizing one second. These codes must */
+ OP_TYPEMINPLUS, /* be in exactly the same order as those above. */
+ OP_TYPEQUERY, /* This set applies to character types such as \d */
+ OP_TYPEMINQUERY,
+ OP_TYPEUPTO, /* From 0 to n matches */
+ OP_TYPEMINUPTO,
+ OP_TYPEEXACT, /* Exactly n matches */
+
+ OP_CRSTAR, /* The maximizing and minimizing versions of */
+ OP_CRMINSTAR, /* all these opcodes must come in pairs, with */
+ OP_CRPLUS, /* the minimizing one second. These codes must */
+ OP_CRMINPLUS, /* be in exactly the same order as those above. */
+ OP_CRQUERY, /* These are for character classes and back refs */
+ OP_CRMINQUERY,
+ OP_CRRANGE, /* These are different to the three seta above. */
+ OP_CRMINRANGE,
+
+ OP_CLASS, /* Match a character class */
+ OP_REF, /* Match a back reference */
+ OP_RECURSE, /* Match this pattern recursively */
+
+ OP_ALT, /* Start of alternation */
+ OP_KET, /* End of group that doesn't have an unbounded repeat */
+ OP_KETRMAX, /* These two must remain together and in this */
+ OP_KETRMIN, /* order. They are for groups the repeat for ever. */
+
+ /* The assertions must come before ONCE and COND */
+
+ OP_ASSERT, /* Positive lookahead */
+ OP_ASSERT_NOT, /* Negative lookahead */
+ OP_ASSERTBACK, /* Positive lookbehind */
+ OP_ASSERTBACK_NOT, /* Negative lookbehind */
+ OP_REVERSE, /* 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, /* Once matched, don't back up into the subpattern */
+ OP_COND, /* Conditional group */
+ OP_CREF, /* Used to hold an extraction string number (cond ref) */
+
+ OP_BRAZERO, /* These two must remain together and in this */
+ OP_BRAMINZERO, /* order. */
+
+ OP_BRANUMBER, /* Used for extracting brackets whose number is greater
+ than can fit into an opcode. */
+
+ OP_BRA /* This and greater values are used for brackets that
+ extract substrings up to a basic limit. After that,
+ use is made of OP_BRANUMBER. */
+};
+
+/* 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 150
+
+/* The texts of compile-time error messages are defined as macros here so that
+they can be accessed by the POSIX wrapper and converted into error codes. Yes,
+I could have used error codes in the first place, but didn't feel like changing
+just to accommodate the POSIX wrapper. */
+
+#define ERR1 "\\ at end of pattern"
+#define ERR2 "\\c at end of pattern"
+#define ERR3 "unrecognized character follows \\"
+#define ERR4 "numbers out of order in {} quantifier"
+#define ERR5 "number too big in {} quantifier"
+#define ERR6 "missing terminating ] for character class"
+#define ERR7 "invalid escape sequence in character class"
+#define ERR8 "range out of order in character class"
+#define ERR9 "nothing to repeat"
+#define ERR10 "operand of unlimited repeat could match the empty string"
+#define ERR11 "internal error: unexpected repeat"
+#define ERR12 "unrecognized character after (?"
+#define ERR13 "unused error"
+#define ERR14 "missing )"
+#define ERR15 "back reference to non-existent subpattern"
+#define ERR16 "erroffset passed as NULL"
+#define ERR17 "unknown option bit(s) set"
+#define ERR18 "missing ) after comment"
+#define ERR19 "parentheses nested too deeply"
+#define ERR20 "regular expression too large"
+#define ERR21 "failed to get memory"
+#define ERR22 "unmatched parentheses"
+#define ERR23 "internal error: code overflow"
+#define ERR24 "unrecognized character after (?<"
+#define ERR25 "lookbehind assertion is not fixed length"
+#define ERR26 "malformed number after (?("
+#define ERR27 "conditional group contains more than two branches"
+#define ERR28 "assertion expected after (?("
+#define ERR29 "(?p must be followed by )"
+#define ERR30 "unknown POSIX class name"
+#define ERR31 "POSIX collating elements are not supported"
+#define ERR32 "this version of PCRE is not compiled with PCRE_UTF8 support"
+#define ERR33 "characters with values > 255 are not yet supported in classes"
+#define ERR34 "character value in \\x{...} sequence is too large"
+#define ERR35 "invalid condition (?(0)"
+
+/* 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;
+
+/* The real format of the start of the pcre block; the actual code vector
+runs on as long as necessary after the end. */
+
+typedef struct real_pcre {
+ unsigned long int magic_number;
+ size_t size;
+ const unsigned char *tables;
+ unsigned long int options;
+ unsigned short int top_bracket;
+ unsigned short int top_backref;
+ uschar first_char;
+ uschar req_char;
+ uschar code[1];
+} real_pcre;
+
+/* The real format of the extra block returned by pcre_study(). */
+
+typedef struct real_pcre_extra {
+ uschar options;
+ uschar start_bits[32];
+} real_pcre_extra;
+
+
+/* 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 */
+} compile_data;
+
+/* Structure for passing "static" information around between the functions
+doing the matching, so that they are thread-safe. */
+
+typedef struct match_data {
+ int errorcode; /* 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 */
+ const uschar *start_pattern; /* 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 */
+} 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)
+
+/* End of internal.h */