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Diffstat (limited to 'parser.h')
| -rw-r--r-- | parser.h | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/parser.h b/parser.h new file mode 100644 index 0000000..cae3a35 --- /dev/null +++ b/parser.h @@ -0,0 +1,103 @@ +/* parser.h -- Everything you wanted to know about the parser, but were + afraid to ask. */ + +/* Copyright (C) 1995-2021 Free Software Foundation, Inc. + + This file is part of GNU Bash, the Bourne Again SHell. + + Bash is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Bash 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with Bash. If not, see <http://www.gnu.org/licenses/>. +*/ + +#if !defined (_PARSER_H_) +# define _PARSER_H_ + +# include "command.h" +# include "input.h" + +/* Possible states for the parser that require it to do special things. */ +#define PST_CASEPAT 0x000001 /* in a case pattern list */ +#define PST_ALEXPNEXT 0x000002 /* expand next word for aliases */ +#define PST_ALLOWOPNBRC 0x000004 /* allow open brace for function def */ +#define PST_NEEDCLOSBRC 0x000008 /* need close brace */ +#define PST_DBLPAREN 0x000010 /* double-paren parsing - unused */ +#define PST_SUBSHELL 0x000020 /* ( ... ) subshell */ +#define PST_CMDSUBST 0x000040 /* $( ... ) command substitution */ +#define PST_CASESTMT 0x000080 /* parsing a case statement */ +#define PST_CONDCMD 0x000100 /* parsing a [[...]] command */ +#define PST_CONDEXPR 0x000200 /* parsing the guts of [[...]] */ +#define PST_ARITHFOR 0x000400 /* parsing an arithmetic for command - unused */ +#define PST_ALEXPAND 0x000800 /* OK to expand aliases - unused */ +#define PST_EXTPAT 0x001000 /* parsing an extended shell pattern */ +#define PST_COMPASSIGN 0x002000 /* parsing x=(...) compound assignment */ +#define PST_ASSIGNOK 0x004000 /* assignment statement ok in this context */ +#define PST_EOFTOKEN 0x008000 /* yylex checks against shell_eof_token */ +#define PST_REGEXP 0x010000 /* parsing an ERE/BRE as a single word */ +#define PST_HEREDOC 0x020000 /* reading body of here-document */ +#define PST_REPARSE 0x040000 /* re-parsing in parse_string_to_word_list */ +#define PST_REDIRLIST 0x080000 /* parsing a list of redirections preceding a simple command name */ +#define PST_COMMENT 0x100000 /* parsing a shell comment; used by aliases */ +#define PST_ENDALIAS 0x200000 /* just finished expanding and consuming an alias */ +#define PST_NOEXPAND 0x400000 /* don't expand anything in read_token_word; for command substitution */ +#define PST_NOERROR 0x800000 /* don't print error messages in yyerror */ +#define PST_STRING 0x1000000 /* parsing a string to a command or word list */ + +/* Definition of the delimiter stack. Needed by parse.y and bashhist.c. */ +struct dstack { +/* DELIMITERS is a stack of the nested delimiters that we have + encountered so far. */ + char *delimiters; + +/* Offset into the stack of delimiters. */ + int delimiter_depth; + +/* How many slots are allocated to DELIMITERS. */ + int delimiter_space; +}; + +/* States we can be in while scanning a ${...} expansion. Shared between + parse.y and subst.c */ +#define DOLBRACE_PARAM 0x01 +#define DOLBRACE_OP 0x02 +#define DOLBRACE_WORD 0x04 + +#define DOLBRACE_QUOTE 0x40 /* single quote is special in double quotes */ +#define DOLBRACE_QUOTE2 0x80 /* single quote is semi-special in double quotes */ + +/* variable declarations from parse.y */ +extern struct dstack dstack; + +extern char *primary_prompt; +extern char *secondary_prompt; + +extern char *current_prompt_string; + +extern char *ps1_prompt; +extern char *ps2_prompt; +extern char *ps0_prompt; + +extern int expand_aliases; +extern int current_command_line_count; +extern int saved_command_line_count; +extern int shell_eof_token; +extern int current_token; +extern int parser_state; +extern int need_here_doc; + +extern int ignoreeof; +extern int eof_encountered; +extern int eof_encountered_limit; + +extern int line_number, line_number_base; + +#endif /* _PARSER_H_ */ |