forked from KolibriOS/kolibrios
161 lines
5.6 KiB
C
161 lines
5.6 KiB
C
/*
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* -*- mode: c-mode; c-file-style: python -*-
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*/
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#ifndef Py_REGEXPR_H
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#define Py_REGEXPR_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* regexpr.h
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*
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* Author: Tatu Ylonen <ylo@ngs.fi>
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*
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* Copyright (c) 1991 Tatu Ylonen, Espoo, Finland
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*
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* Permission to use, copy, modify, distribute, and sell this software
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* and its documentation for any purpose is hereby granted without fee,
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* provided that the above copyright notice appear in all copies. This
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* software is provided "as is" without express or implied warranty.
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*
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* Created: Thu Sep 26 17:15:36 1991 ylo
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* Last modified: Mon Nov 4 15:49:46 1991 ylo
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*/
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/* $Id$ */
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#ifndef REGEXPR_H
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#define REGEXPR_H
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#define RE_NREGS 100 /* number of registers available */
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typedef struct re_pattern_buffer
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{
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unsigned char *buffer; /* compiled pattern */
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int allocated; /* allocated size of compiled pattern */
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int used; /* actual length of compiled pattern */
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unsigned char *fastmap; /* fastmap[ch] is true if ch can start pattern */
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unsigned char *translate; /* translation to apply during compilation/matching */
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unsigned char fastmap_accurate; /* true if fastmap is valid */
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unsigned char can_be_null; /* true if can match empty string */
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unsigned char uses_registers; /* registers are used and need to be initialized */
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int num_registers; /* number of registers used */
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unsigned char anchor; /* anchor: 0=none 1=begline 2=begbuf */
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} *regexp_t;
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typedef struct re_registers
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{
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int start[RE_NREGS]; /* start offset of region */
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int end[RE_NREGS]; /* end offset of region */
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} *regexp_registers_t;
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/* bit definitions for syntax */
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#define RE_NO_BK_PARENS 1 /* no quoting for parentheses */
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#define RE_NO_BK_VBAR 2 /* no quoting for vertical bar */
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#define RE_BK_PLUS_QM 4 /* quoting needed for + and ? */
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#define RE_TIGHT_VBAR 8 /* | binds tighter than ^ and $ */
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#define RE_NEWLINE_OR 16 /* treat newline as or */
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#define RE_CONTEXT_INDEP_OPS 32 /* ^$?*+ are special in all contexts */
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#define RE_ANSI_HEX 64 /* ansi sequences (\n etc) and \xhh */
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#define RE_NO_GNU_EXTENSIONS 128 /* no gnu extensions */
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#define TP_RE_NOERR 0
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#define TP_RE_UNKNOWN_OPCODE (-1)
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#define TP_RE_JUMP_OUT_BOUNDS 1
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#define TP_RE_QUOTE_ERR 2
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/* definitions for some common regexp styles */
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#define RE_SYNTAX_AWK (RE_NO_BK_PARENS|RE_NO_BK_VBAR|RE_CONTEXT_INDEP_OPS)
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#define RE_SYNTAX_EGREP (RE_SYNTAX_AWK|RE_NEWLINE_OR)
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#define RE_SYNTAX_GREP (RE_BK_PLUS_QM|RE_NEWLINE_OR)
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#define RE_SYNTAX_EMACS 0
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#define Sword 1
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#define Swhitespace 2
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#define Sdigit 4
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#define Soctaldigit 8
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#define Shexdigit 16
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/* Rename all exported symbols to avoid conflicts with similarly named
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symbols in some systems' standard C libraries... */
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#define re_syntax _Py_re_syntax
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#define re_syntax_table _Py_re_syntax_table
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#define re_compile_initialize _Py_re_compile_initialize
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#define re_set_syntax _Py_re_set_syntax
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#define re_compile_pattern _Py_re_compile_pattern
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#define re_match _Py_re_match
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#define re_search _Py_re_search
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#define re_compile_fastmap _Py_re_compile_fastmap
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#define re_comp _Py_re_comp
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#define re_exec _Py_re_exec
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#ifdef HAVE_PROTOTYPES
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extern int re_syntax;
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/* This is the actual syntax mask. It was added so that Python could do
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* syntax-dependent munging of patterns before compilation. */
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extern unsigned char re_syntax_table[256];
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void re_compile_initialize(void);
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int re_set_syntax(int syntax);
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/* This sets the syntax to use and returns the previous syntax. The
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* syntax is specified by a bit mask of the above defined bits. */
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char *re_compile_pattern(unsigned char *regex, int regex_size, regexp_t compiled);
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/* This compiles the regexp (given in regex and length in regex_size).
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* This returns NULL if the regexp compiled successfully, and an error
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* message if an error was encountered. The buffer field must be
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* initialized to a memory area allocated by malloc (or to NULL) before
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* use, and the allocated field must be set to its length (or 0 if
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* buffer is NULL). Also, the translate field must be set to point to a
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* valid translation table, or NULL if it is not used. */
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int re_match(regexp_t compiled, unsigned char *string, int size, int pos,
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regexp_registers_t old_regs);
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/* This tries to match the regexp against the string. This returns the
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* length of the matched portion, or -1 if the pattern could not be
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* matched and -2 if an error (such as failure stack overflow) is
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* encountered. */
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int re_search(regexp_t compiled, unsigned char *string, int size, int startpos,
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int range, regexp_registers_t regs);
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/* This searches for a substring matching the regexp. This returns the
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* first index at which a match is found. range specifies at how many
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* positions to try matching; positive values indicate searching
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* forwards, and negative values indicate searching backwards. mstop
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* specifies the offset beyond which a match must not go. This returns
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* -1 if no match is found, and -2 if an error (such as failure stack
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* overflow) is encountered. */
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void re_compile_fastmap(regexp_t compiled);
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/* This computes the fastmap for the regexp. For this to have any effect,
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* the calling program must have initialized the fastmap field to point
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* to an array of 256 characters. */
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#else /* HAVE_PROTOTYPES */
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extern int re_syntax;
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extern unsigned char re_syntax_table[256];
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void re_compile_initialize();
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int re_set_syntax();
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char *re_compile_pattern();
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int re_match();
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int re_search();
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void re_compile_fastmap();
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#endif /* HAVE_PROTOTYPES */
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#endif /* REGEXPR_H */
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_REGEXPR_H */
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