| /************************************************* |
| * Perl-Compatible Regular Expressions * |
| *************************************************/ |
| |
| |
| #define PCRE_VERSION "0.95 23-Sep-1997" |
| |
| |
| /* 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 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. |
| ----------------------------------------------------------------------------- |
| */ |
| |
| /* This header contains definitions that are shared between the different |
| modules, but which are not relevant to the outside. */ |
| |
| /* Standard C headers plus the external interface definition */ |
| |
| #include <ctype.h> |
| #include <limits.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include "pcre.h" |
| |
| /* Private options flags start at the most significant end of the byte. The |
| public options defined in pcre.h start at the least significant end. Make sure |
| they don't overlap! */ |
| |
| #define PCRE_FIRSTSET 0x80 /* first_char is set */ |
| #define PCRE_STARTLINE 0x40 /* start after \n for multiline */ |
| |
| /* Options for the "extra" block produced by pcre_study(). */ |
| |
| #define PCRE_STUDY_CASELESS 0x01 /* study was caseless */ |
| #define PCRE_STUDY_MAPPED 0x20 /* a map of starting chars exists */ |
| |
| /* Masks for identifying the public options: all permitted at compile time, |
| only some permitted at run or study time. */ |
| |
| #ifdef FOR_PYTHON |
| #define PUBLIC_OPTIONS \ |
| (PCRE_CASELESS|PCRE_EXTENDED|PCRE_ANCHORED|PCRE_MULTILINE|PCRE_DOTALL) |
| #else |
| #define PUBLIC_OPTIONS \ |
| (PCRE_CASELESS|PCRE_EXTENDED|PCRE_ANCHORED|PCRE_MULTILINE) |
| #endif |
| #define PUBLIC_EXEC_OPTIONS (PCRE_CASELESS|PCRE_ANCHORED|PCRE_MULTILINE) |
| #define PUBLIC_STUDY_OPTIONS (PCRE_CASELESS) |
| |
| /* Magic number to provide a small check against being handed junk. */ |
| |
| #define MAGIC_NUMBER 0x50435245 /* 'PCRE' */ |
| |
| /* Miscellaneous definitions */ |
| |
| typedef int BOOL; |
| |
| #define FALSE 0 |
| #define TRUE 1 |
| |
| /* Flags for character classes - see also class_ops table below. */ |
| |
| #define CLASS_DIGITS 0x01 |
| #define CLASS_NOT_DIGITS 0x02 |
| #define CLASS_WHITESPACE 0x04 |
| #define CLASS_NOT_WHITESPACE 0x08 |
| #define CLASS_WORD 0x10 |
| #define CLASS_NOT_WORD 0x20 |
| |
| /* 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_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_EOL 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, /* \W */ |
| OP_WORD_BOUNDARY, /* \w */ |
| OP_NOT_DIGIT, /* \D */ |
| OP_DIGIT, /* \d */ |
| OP_NOT_WHITESPACE, /* \S */ |
| OP_WHITESPACE, /* \s */ |
| OP_NOT_WORDCHAR, /* \W */ |
| OP_WORDCHAR, /* \w */ |
| OP_EOD, /* End of data: or \Z. This must always be the last |
| of the backslashed meta values. */ |
| |
| 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_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_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, |
| OP_TYPEMINUPTO, |
| OP_TYPEEXACT, |
| |
| 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 two seta above. */ |
| OP_CRMINRANGE, |
| |
| OP_CLASS, /* Match a character class */ |
| OP_NEGCLASS, /* Don't match a character class */ |
| OP_REF, /* Match a back reference */ |
| |
| 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. */ |
| |
| OP_ASSERT, |
| OP_ASSERT_NOT, |
| |
| OP_BRAZERO, /* These two must remain together and in this */ |
| OP_BRAMINZERO, /* order. */ |
| |
| OP_BRA /* This and greater values are used for brackets that |
| extract substrings. */ |
| }; |
| |
| /* The highest extraction number. This is limited by the number of opcodes |
| left after OP_BRA, i.e. 255 - OP_BRA. We actually set it somewhat lower. */ |
| |
| #define EXTRACT_MAX 99 |
| |
| /* 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 int magic_number; |
| unsigned char options; |
| unsigned char top_bracket; |
| unsigned char first_char; |
| unsigned char code[1]; |
| } real_pcre; |
| |
| /* The real format of the extra block returned by pcre_study(). */ |
| |
| typedef struct real_pcre_extra { |
| unsigned char options; |
| unsigned char start_bits[32]; |
| } real_pcre_extra; |
| |
| /* Global tables from pcre-chartables.c */ |
| |
| extern uschar pcre_lcc[]; |
| extern uschar pcre_ucc[]; |
| extern uschar pcre_ctypes[]; |
| |
| /* Bit definitions for entries in pcre_ctypes[]. */ |
| |
| #define ctype_space 0x01 |
| #define ctype_digit 0x02 |
| #define ctype_xdigit 0x04 |
| #define ctype_word 0x08 /* alphameric or '_' */ |
| #ifdef FOR_PYTHON |
| #define ctype_odigit 0x10 /* Octal digits */ |
| #endif |
| #define ctype_meta 0x80 /* regexp meta char or zero (end pattern) */ |
| |
| /* End of pcre-internal.h */ |