-/*
-
-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 is hereby granted without fee, provided that the
-above copyright notice appears in all source code copies, the name of
-Tatu Ylonen is not used to advertise products containing this software
-or a derivation thereof, and all modified versions are clearly marked
-as such.
-
-This software is provided "as is" without express or implied warranty.
-
-Created: Thu Sep 26 17:15:36 1991 ylo
-Last modified: Fri Jan 3 12:05:45 1992 ylo
-
-*/
-
-/* $Id$ */
-
-#ifndef REGEXPR_H
-#define REGEXPR_H
-
-#define RE_NREGS 10 /* 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
-
-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). */
-
-/* POSIX Compatibility */
-#define regex_t struct re_pattern_buffer
-#define regmatch_t struct re_registers
-#define REG_EXTENDED 1
-#define REG_ICASE (REG_EXTENDED << 1)
-#define REG_NEWLINE (REG_ICASE << 1)
-#define REG_NOSUB (REG_NEWLINE << 1)
-#define REG_NOTBOL 1
-#define REG_NOTEOL (REG_NOTBOL << 1)
-int regcomp(regex_t *preg, const char *regex, int cflags);
-int regexec(const regex_t *preg, const char *string, size_t nmatch,
- regmatch_t pmatch[], int eflags);
-size_t regerror(int errcode, const regex_t *preg, char *errbuf,
- size_t errbuf_size);
-void regfree(regex_t *preg);
-
-#endif /* REGEXPR_H */
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