152 lines
5.4 KiB
C++
152 lines
5.4 KiB
C++
#ifndef Py_REGEXPR_H
|
|
#define Py_REGEXPR_H
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/*
|
|
|
|
regexpr.h
|
|
|
|
Author: Tatu Ylonen <ylo@ngs.fi>
|
|
|
|
Copyright (c) 1991 Tatu Ylonen, Espoo, Finland
|
|
|
|
Permission to use, copy, modify, distribute, and sell this software
|
|
and its documentation for any purpose is hereby granted without fee,
|
|
provided that the above copyright notice appear in all copies. This
|
|
software is provided "as is" without express or implied warranty.
|
|
|
|
Created: Thu Sep 26 17:15:36 1991 ylo
|
|
Last modified: Mon Nov 4 15:49:46 1991 ylo
|
|
|
|
*/
|
|
|
|
#ifndef REGEXPR_H
|
|
#define REGEXPR_H
|
|
|
|
#if defined(__STDC__) || defined(THINK_C)
|
|
#undef HAVE_PROTOTYPES
|
|
#define HAVE_PROTOTYPES
|
|
#endif
|
|
|
|
#define RE_NREGS 100 /* number of registers available */
|
|
|
|
typedef struct re_pattern_buffer
|
|
{
|
|
char *buffer; /* compiled pattern */
|
|
int allocated; /* allocated size of compiled pattern */
|
|
int used; /* actual length of compiled pattern */
|
|
char *fastmap; /* fastmap[ch] is true if ch can start pattern */
|
|
char *translate; /* translation to apply during compilation/matching */
|
|
char fastmap_accurate; /* true if fastmap is valid */
|
|
char can_be_null; /* true if can match empty string */
|
|
char uses_registers; /* registers are used and need to be initialized */
|
|
char anchor; /* anchor: 0=none 1=begline 2=begbuf */
|
|
} *regexp_t;
|
|
|
|
typedef struct re_registers
|
|
{
|
|
int start[RE_NREGS]; /* start offset of region */
|
|
int end[RE_NREGS]; /* end offset of region */
|
|
} *regexp_registers_t;
|
|
|
|
/* bit definitions for syntax */
|
|
#define RE_NO_BK_PARENS 1 /* no quoting for parentheses */
|
|
#define RE_NO_BK_VBAR 2 /* no quoting for vertical bar */
|
|
#define RE_BK_PLUS_QM 4 /* quoting needed for + and ? */
|
|
#define RE_TIGHT_VBAR 8 /* | binds tighter than ^ and $ */
|
|
#define RE_NEWLINE_OR 16 /* treat newline as or */
|
|
#define RE_CONTEXT_INDEP_OPS 32 /* ^$?*+ are special in all contexts */
|
|
#define RE_ANSI_HEX 64 /* ansi sequences (\n etc) and \xhh */
|
|
#define RE_NO_GNU_EXTENSIONS 128 /* no gnu extensions */
|
|
|
|
/* definitions for some common regexp styles */
|
|
#define RE_SYNTAX_AWK (RE_NO_BK_PARENS|RE_NO_BK_VBAR|RE_CONTEXT_INDEP_OPS)
|
|
#define RE_SYNTAX_EGREP (RE_SYNTAX_AWK|RE_NEWLINE_OR)
|
|
#define RE_SYNTAX_GREP (RE_BK_PLUS_QM|RE_NEWLINE_OR)
|
|
#define RE_SYNTAX_EMACS 0
|
|
|
|
#ifdef HAVE_PROTOTYPES
|
|
|
|
int re_set_syntax(int syntax);
|
|
/* This sets the syntax to use and returns the previous syntax. The
|
|
syntax is specified by a bit mask of the above defined bits. */
|
|
|
|
char *re_compile_pattern(char *regex, int regex_size, regexp_t compiled);
|
|
/* This compiles the regexp (given in regex and length in regex_size).
|
|
This returns NULL if the regexp compiled successfully, and an error
|
|
message if an error was encountered. The buffer field must be
|
|
initialized to a memory area allocated by malloc (or to NULL) before
|
|
use, and the allocated field must be set to its length (or 0 if buffer is
|
|
NULL). Also, the translate field must be set to point to a valid
|
|
translation table, or NULL if it is not used. */
|
|
|
|
int re_match(regexp_t compiled, char *string, int size, int pos,
|
|
regexp_registers_t regs);
|
|
/* This tries to match the regexp against the string. This returns the
|
|
length of the matched portion, or -1 if the pattern could not be
|
|
matched and -2 if an error (such as failure stack overflow) is
|
|
encountered. */
|
|
|
|
int re_match_2(regexp_t compiled, char *string1, int size1,
|
|
char *string2, int size2, int pos, regexp_registers_t regs,
|
|
int mstop);
|
|
/* This tries to match the regexp to the concatenation of string1 and
|
|
string2. This returns the length of the matched portion, or -1 if the
|
|
pattern could not be matched and -2 if an error (such as failure stack
|
|
overflow) is encountered. */
|
|
|
|
int re_search(regexp_t compiled, char *string, int size, int startpos,
|
|
int range, regexp_registers_t regs);
|
|
/* This rearches for a substring matching the regexp. This returns the first
|
|
index at which a match is found. range specifies at how many positions to
|
|
try matching; positive values indicate searching forwards, and negative
|
|
values indicate searching backwards. mstop specifies the offset beyond
|
|
which a match must not go. This returns -1 if no match is found, and
|
|
-2 if an error (such as failure stack overflow) is encountered. */
|
|
|
|
int re_search_2(regexp_t compiled, char *string1, int size1,
|
|
char *string2, int size2, int startpos, int range,
|
|
regexp_registers_t regs, int mstop);
|
|
/* This is like re_search, but search from the concatenation of string1 and
|
|
string2. */
|
|
|
|
void re_compile_fastmap(regexp_t compiled);
|
|
/* This computes the fastmap for the regexp. For this to have any effect,
|
|
the calling program must have initialized the fastmap field to point
|
|
to an array of 256 characters. */
|
|
|
|
char *re_comp(char *s);
|
|
/* BSD 4.2 regex library routine re_comp. This compiles the regexp into
|
|
an internal buffer. This returns NULL if the regexp was compiled
|
|
successfully, and an error message if there was an error. */
|
|
|
|
int re_exec(char *s);
|
|
/* BSD 4.2 regexp library routine re_exec. This returns true if the string
|
|
matches the regular expression (that is, a matching part is found
|
|
anywhere in the string). */
|
|
|
|
#else /* HAVE_PROTOTYPES */
|
|
|
|
int re_set_syntax();
|
|
char *re_compile_pattern();
|
|
int re_match();
|
|
int re_match_2();
|
|
int re_search();
|
|
int re_search_2();
|
|
void re_compile_fastmap();
|
|
char *re_comp();
|
|
int re_exec();
|
|
|
|
#endif /* HAVE_PROTOTYPES */
|
|
|
|
#endif /* REGEXPR_H */
|
|
|
|
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif /* !Py_REGEXPR_H */
|