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- /* classes: h_files */
-
- #ifndef RXGNUCOMPH
- #define RXGNUCOMPH
- /* Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Library General Public License as published by
- * the Free Software Foundation; either version 2, or (at your option)
- * any later version.
- *
- * This program 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. See the
- * GNU Library General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; see the file COPYING. If not, write to
- * the Free Software Foundation, 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-
-
- #include "rxcset.h"
- #include "rxnode.h"
-
-
-
-
- /* This is an array of error messages corresponding to the error codes.
- */
- extern const char *rx_error_msg[];
-
-
-
- /* If any error codes are removed, changed, or added, update the
- * `rx_error_msg' table.
- */
- typedef enum
- {
- REG_NOERROR = 0, /* Success. */
- REG_NOMATCH, /* Didn't find a match (for regexec). */
-
- /* POSIX regcomp return error codes. (In the order listed in the
- standard.) */
- REG_BADPAT, /* Invalid pattern. */
- REG_ECOLLATE, /* Not implemented. */
- REG_ECTYPE, /* Invalid character class name. */
- REG_EESCAPE, /* Trailing backslash. */
- REG_ESUBREG, /* Invalid back reference. */
- REG_EBRACK, /* Unmatched left bracket. */
- REG_EPAREN, /* Parenthesis imbalance. */
- REG_EBRACE, /* Unmatched \{. */
- REG_BADBR, /* Invalid contents of \{\}. */
- REG_ERANGE, /* Invalid range end. */
- REG_ESPACE, /* Ran out of memory. */
- REG_BADRPT, /* No preceding re for repetition op. */
-
- /* Error codes we've added. */
- REG_EEND, /* Premature end. */
- REG_ESIZE, /* Compiled pattern bigger than 2^16 bytes. */
- REG_ERPAREN /* Unmatched ) or \); not returned from regcomp. */
- } reg_errcode_t;
-
-
- /* {Syntax Bits}
- */
-
- /* The following bits are used to determine the regexp syntax we
- recognize. The set/not-set meanings are chosen so that Emacs syntax
- remains the value 0. The bits are given in alphabetical order, and
- the definitions shifted by one from the previous bit; thus, when we
- add or remove a bit, only one other definition need change. */
-
- /* If this bit is not set, then \ inside a bracket expression is literal.
- If set, then such a \ quotes the following character. */
- #define RE_BACKSLASH_ESCAPE_IN_LISTS (1)
-
- /* If this bit is not set, then + and ? are operators, and \+ and \? are
- literals.
- If set, then \+ and \? are operators and + and ? are literals. */
- #define RE_BK_PLUS_QM (RE_BACKSLASH_ESCAPE_IN_LISTS << 1)
-
- /* If this bit is set, then character classes are supported. They are:
- [:alpha:], [:upper:], [:lower:], [:digit:], [:alnum:], [:xdigit:],
- [:space:], [:print:], [:punct:], [:graph:], and [:cntrl:].
- If not set, then character classes are not supported. */
- #define RE_CHAR_CLASSES (RE_BK_PLUS_QM << 1)
-
- /* If this bit is set, then ^ and $ are always anchors (outside bracket
- expressions, of course).
- If this bit is not set, then it depends:
- ^ is an anchor if it is at the beginning of a regular
- expression or after an open-group or an alternation operator;
- $ is an anchor if it is at the end of a regular expression, or
- before a close-group or an alternation operator.
-
- This bit could be (re)combined with RE_CONTEXT_INDEP_OPS, because
- POSIX draft 11.2 says that * etc. in leading positions is undefined.
- We already implemented a previous draft which made those constructs
- invalid, though, so we haven't changed the code back. */
- #define RE_CONTEXT_INDEP_ANCHORS (RE_CHAR_CLASSES << 1)
-
- /* If this bit is set, then special characters are always special
- regardless of where they are in the pattern.
- If this bit is not set, then special characters are special only in
- some contexts; otherwise they are ordinary. Specifically,
- * + ? and intervals are only special when not after the beginning,
- open-group, or alternation operator. */
- #define RE_CONTEXT_INDEP_OPS (RE_CONTEXT_INDEP_ANCHORS << 1)
-
- /* If this bit is set, then *, +, ?, and { cannot be first in an re or
- immediately after an alternation or begin-group operator. */
- #define RE_CONTEXT_INVALID_OPS (RE_CONTEXT_INDEP_OPS << 1)
-
- /* If this bit is set, then . matches newline.
- If not set, then it doesn't. */
- #define RE_DOT_NEWLINE (RE_CONTEXT_INVALID_OPS << 1)
-
- /* If this bit is set, then . doesn't match NUL.
- If not set, then it does. */
- #define RE_DOT_NOT_NULL (RE_DOT_NEWLINE << 1)
-
- /* If this bit is set, nonmatching lists [^...] do not match newline.
- If not set, they do. */
- #define RE_HAT_LISTS_NOT_NEWLINE (RE_DOT_NOT_NULL << 1)
-
- /* If this bit is set, either \{...\} or {...} defines an
- interval, depending on RE_NO_BK_BRACES.
- If not set, \{, \}, {, and } are literals. */
- #define RE_INTERVALS (RE_HAT_LISTS_NOT_NEWLINE << 1)
-
- /* If this bit is set, +, ? and | aren't recognized as operators.
- If not set, they are. */
- #define RE_LIMITED_OPS (RE_INTERVALS << 1)
-
- /* If this bit is set, newline is an alternation operator.
- If not set, newline is literal. */
- #define RE_NEWLINE_ALT (RE_LIMITED_OPS << 1)
-
- /* If this bit is set, then `{...}' defines an interval, and \{ and \}
- are literals.
- If not set, then `\{...\}' defines an interval. */
- #define RE_NO_BK_BRACES (RE_NEWLINE_ALT << 1)
-
- /* If this bit is set, (...) defines a group, and \( and \) are literals.
- If not set, \(...\) defines a group, and ( and ) are literals. */
- #define RE_NO_BK_PARENS (RE_NO_BK_BRACES << 1)
-
- /* If this bit is set, then \<digit> matches <digit>.
- If not set, then \<digit> is a back-reference. */
- #define RE_NO_BK_REFS (RE_NO_BK_PARENS << 1)
-
- /* If this bit is set, then | is an alternation operator, and \| is literal.
- If not set, then \| is an alternation operator, and | is literal. */
- #define RE_NO_BK_VBAR (RE_NO_BK_REFS << 1)
-
- /* If this bit is set, then an ending range point collating higher
- than the starting range point, as in [z-a], is invalid.
- If not set, then when ending range point collates higher than the
- starting range point, the range is ignored. */
- #define RE_NO_EMPTY_RANGES (RE_NO_BK_VBAR << 1)
-
- /* If this bit is set, then an unmatched ) is ordinary.
- If not set, then an unmatched ) is invalid. */
- #define RE_UNMATCHED_RIGHT_PAREN_ORD (RE_NO_EMPTY_RANGES << 1)
-
- /* Define combinations of the above bits for the standard possibilities.
- (The [[[ comments delimit what gets put into the Texinfo file, so
- don't delete them!) */
- /* [[[begin syntaxes]]] */
- #define RE_SYNTAX_EMACS 0
-
- #define RE_SYNTAX_AWK \
- (RE_BACKSLASH_ESCAPE_IN_LISTS | RE_DOT_NOT_NULL \
- | RE_NO_BK_PARENS | RE_NO_BK_REFS \
- | RE_NO_BK_VBAR | RE_NO_EMPTY_RANGES \
- | RE_UNMATCHED_RIGHT_PAREN_ORD)
-
- #define RE_SYNTAX_POSIX_AWK \
- (RE_SYNTAX_POSIX_EXTENDED | RE_BACKSLASH_ESCAPE_IN_LISTS)
-
- #define RE_SYNTAX_GREP \
- (RE_BK_PLUS_QM | RE_CHAR_CLASSES \
- | RE_HAT_LISTS_NOT_NEWLINE | RE_INTERVALS \
- | RE_NEWLINE_ALT)
-
- #define RE_SYNTAX_EGREP \
- (RE_CHAR_CLASSES | RE_CONTEXT_INDEP_ANCHORS \
- | RE_CONTEXT_INDEP_OPS | RE_HAT_LISTS_NOT_NEWLINE \
- | RE_NEWLINE_ALT | RE_NO_BK_PARENS \
- | RE_NO_BK_VBAR)
-
- #define RE_SYNTAX_POSIX_EGREP \
- (RE_SYNTAX_EGREP | RE_INTERVALS | RE_NO_BK_BRACES)
-
- #define RE_SYNTAX_SED RE_SYNTAX_POSIX_BASIC
-
- /* Syntax bits common to both basic and extended POSIX regex syntax. */
- #define _RE_SYNTAX_POSIX_COMMON \
- (RE_CHAR_CLASSES | RE_DOT_NEWLINE | RE_DOT_NOT_NULL \
- | RE_INTERVALS | RE_NO_EMPTY_RANGES)
-
- #define RE_SYNTAX_POSIX_BASIC \
- (_RE_SYNTAX_POSIX_COMMON | RE_BK_PLUS_QM)
-
- /* Differs from ..._POSIX_BASIC only in that RE_BK_PLUS_QM becomes
- RE_LIMITED_OPS, i.e., \? \+ \| are not recognized. Actually, this
- isn't minimal, since other operators, such as \`, aren't disabled. */
- #define RE_SYNTAX_POSIX_MINIMAL_BASIC \
- (_RE_SYNTAX_POSIX_COMMON | RE_LIMITED_OPS)
-
- #define RE_SYNTAX_POSIX_EXTENDED \
- (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS \
- | RE_CONTEXT_INDEP_OPS | RE_NO_BK_BRACES \
- | RE_NO_BK_PARENS | RE_NO_BK_VBAR \
- | RE_UNMATCHED_RIGHT_PAREN_ORD)
-
- /* Differs from ..._POSIX_EXTENDED in that RE_CONTEXT_INVALID_OPS
- replaces RE_CONTEXT_INDEP_OPS and RE_NO_BK_REFS is added. */
- #define RE_SYNTAX_POSIX_MINIMAL_EXTENDED \
- (_RE_SYNTAX_POSIX_COMMON | RE_CONTEXT_INDEP_ANCHORS \
- | RE_CONTEXT_INVALID_OPS | RE_NO_BK_BRACES \
- | RE_NO_BK_PARENS | RE_NO_BK_REFS \
- | RE_NO_BK_VBAR | RE_UNMATCHED_RIGHT_PAREN_ORD)
- /* [[[end syntaxes]]] */
-
-
-
- /* Maximum number of duplicates an interval can allow. Some systems
- (erroneously) define this in other header files, but we want our
- value, so remove any previous define. */
- #ifdef RE_DUP_MAX
- #undef RE_DUP_MAX
- #endif
- #define RE_DUP_MAX ((1 << 15) - 1)
-
-
-
- #ifdef __STDC__
- extern reg_errcode_t rx_parse (struct rexp_node ** rexp_p,
- const char *pattern,
- int size,
- unsigned long syntax,
- int cset_size,
- unsigned char *translate);
-
- #else /* STDC */
- extern reg_errcode_t rx_parse ();
-
- #endif /* STDC */
-
- #endif /* RXGNUCOMPH */
-