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/* Copyright (C) 1989-2020 Free Software Foundation, Inc.
Written by James Clark (jjc@jclark.com)
This file is part of groff.
groff 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.
groff 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 this program. If not, see <http://www.gnu.org/licenses/>. */
class charinfo;
struct node;
class vunits;
class token {
symbol nm;
node *nd;
unsigned char c;
int val;
units dim;
enum token_type {
TOKEN_BACKSPACE,
TOKEN_BEGIN_TRAP,
TOKEN_CHAR, // a normal printing character
TOKEN_DUMMY, // \&
TOKEN_EMPTY, // this is the initial value
TOKEN_END_TRAP,
TOKEN_ESCAPE, // \e
TOKEN_HYPHEN_INDICATOR,
TOKEN_INTERRUPT, // \c
TOKEN_ITALIC_CORRECTION, // \/
TOKEN_LEADER, // ^A
TOKEN_LEFT_BRACE,
TOKEN_MARK_INPUT, // \k -- 'nm' is the name of the register
TOKEN_NEWLINE, // newline
TOKEN_NODE,
TOKEN_NUMBERED_CHAR,
TOKEN_PAGE_EJECTOR,
TOKEN_REQUEST,
TOKEN_RIGHT_BRACE,
TOKEN_SPACE, // ' ' -- ordinary space
TOKEN_SPECIAL, // a special character -- \' \` \- \(xx \[xxx]
TOKEN_SPREAD, // \p -- break and spread output line
TOKEN_STRETCHABLE_SPACE, // \~
TOKEN_UNSTRETCHABLE_SPACE, // '\ '
TOKEN_HORIZONTAL_SPACE, // \|, \^, \0, \h
TOKEN_TAB, // tab
TOKEN_TRANSPARENT, // \!
TOKEN_TRANSPARENT_DUMMY, // \)
TOKEN_ZERO_WIDTH_BREAK, // \:
TOKEN_EOF // end of file
} type;
public:
token();
~token();
token(const token &);
void operator=(const token &);
void next();
void process();
void skip();
int nspaces(); // 1 if space, 0 otherwise
bool is_eof();
bool is_space();
bool is_stretchable_space();
bool is_unstretchable_space();
bool is_horizontal_space();
bool is_white_space();
bool is_special();
bool is_newline();
bool is_tab();
bool is_leader();
bool is_backspace();
bool usable_as_delimiter(bool = false);
bool is_dummy();
bool is_transparent_dummy();
bool is_transparent();
bool is_left_brace();
bool is_right_brace();
bool is_page_ejector();
bool is_hyphen_indicator();
bool is_zero_width_break();
int operator==(const token &); // need this for delimiters, and for conditions
int operator!=(const token &); // ditto
unsigned char ch();
charinfo *get_char(bool = false);
int add_to_zero_width_node_list(node **);
void make_space();
void make_newline();
const char *description();
friend void process_input_stack();
friend node *do_overstrike();
};
extern token tok; // the current token
extern symbol get_name(bool = false);
extern symbol get_long_name(bool = false);
extern charinfo *get_optional_char();
extern char *read_string();
extern void check_missing_character();
extern void skip_line();
extern void handle_initial_title();
enum char_mode {
CHAR_NORMAL,
CHAR_FALLBACK,
CHAR_FONT_SPECIAL,
CHAR_SPECIAL
};
extern void do_define_character(char_mode, const char * = 0);
class hunits;
extern void read_title_parts(node **part, hunits *part_width);
extern int get_number_rigidly(units *result, unsigned char si);
extern int get_number(units *result, unsigned char si);
extern int get_integer(int *result);
extern int get_number(units *result, unsigned char si, units prev_value);
extern int get_integer(int *result, int prev_value);
void interpolate_number_reg(symbol, int);
const char *asciify(int c);
inline bool token::is_newline()
{
return type == TOKEN_NEWLINE;
}
inline bool token::is_space()
{
return type == TOKEN_SPACE;
}
inline bool token::is_stretchable_space()
{
return type == TOKEN_STRETCHABLE_SPACE;
}
inline bool token::is_unstretchable_space()
{
return type == TOKEN_UNSTRETCHABLE_SPACE;
}
inline bool token::is_horizontal_space()
{
return type == TOKEN_HORIZONTAL_SPACE;
}
inline bool token::is_special()
{
return type == TOKEN_SPECIAL;
}
inline int token::nspaces()
{
return (int)(type == TOKEN_SPACE);
}
inline bool token::is_white_space()
{
return type == TOKEN_SPACE || type == TOKEN_TAB;
}
inline bool token::is_transparent()
{
return type == TOKEN_TRANSPARENT;
}
inline bool token::is_page_ejector()
{
return type == TOKEN_PAGE_EJECTOR;
}
inline unsigned char token::ch()
{
return type == TOKEN_CHAR ? c : 0;
}
inline bool token::is_eof()
{
return type == TOKEN_EOF;
}
inline bool token::is_dummy()
{
return type == TOKEN_DUMMY;
}
inline bool token::is_transparent_dummy()
{
return type == TOKEN_TRANSPARENT_DUMMY;
}
inline bool token::is_left_brace()
{
return type == TOKEN_LEFT_BRACE;
}
inline bool token::is_right_brace()
{
return type == TOKEN_RIGHT_BRACE;
}
inline bool token::is_tab()
{
return type == TOKEN_TAB;
}
inline bool token::is_leader()
{
return type == TOKEN_LEADER;
}
inline bool token::is_backspace()
{
return type == TOKEN_BACKSPACE;
}
inline bool token::is_hyphen_indicator()
{
return type == TOKEN_HYPHEN_INDICATOR;
}
inline bool token::is_zero_width_break()
{
return type == TOKEN_ZERO_WIDTH_BREAK;
}
bool has_arg();
// Local Variables:
// fill-column: 72
// mode: C++
// End:
// vim: set cindent noexpandtab shiftwidth=2 textwidth=72:
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