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Diffstat (limited to 'rubbos/app/httpd-2.0.64/srclib/pcre/internal.h')
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1 files changed, 412 insertions, 0 deletions
diff --git a/rubbos/app/httpd-2.0.64/srclib/pcre/internal.h b/rubbos/app/httpd-2.0.64/srclib/pcre/internal.h new file mode 100644 index 00000000..0c8c1c9d --- /dev/null +++ b/rubbos/app/httpd-2.0.64/srclib/pcre/internal.h @@ -0,0 +1,412 @@ +/************************************************* +* 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 */ |