1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
|
// -*- C++ -*-
// include system headers: stdio, string, math (+ M_PI, M_SQRT2), stdlib, errno
#include "sys-defines.h"
// include all libgroff headers in ./include.
#include "cset.h"
#include "errarg.h"
#include "error.h"
#include "lib.h"
#include "position.h"
#include "ptable.h"
#include "stringclass.h"
#include "text.h"
// declare input and file_input classes
class input
{
public:
// ctor, dtor
input ();
virtual ~input ();
// public functions (all virtual)
virtual int get (void) = 0;
virtual int peek (void) = 0;
virtual int get_location (const char **filenamep, int *linenop);
// friend classes
friend class input_stack;
friend class copy_rest_thru_input;
private:
input *next;
};
class file_input : public input
{
public:
// ctor, dtor
file_input (FILE *, const char *);
~file_input ();
// public functions
int get (void);
int peek (void);
int get_location(const char **filenamep, int *linenop);
private:
FILE *fp;
const char *filename;
int lineno;
string line;
const char *ptr;
int read_line (void);
};
// External functions
// interface to lexer in lex.cc
extern int yylex (void);
extern void copy_file_thru (const char *filename, const char *body, const char *until);
extern void copy_rest_thru (const char *body, const char *until);
extern void do_copy (const char *filename);
extern void do_for (char *var, double from, double to, int by_is_multiplicative, double by, char *body);
extern void do_lookahead (void);
extern void lex_cleanup (void);
extern void lex_error (const char *message, const errarg &arg1 = empty_errarg, const errarg &arg2 = empty_errarg, const errarg &arg3 = empty_errarg);
extern void lex_init (input *top);
extern void lex_warning (const char *message, const errarg &arg1 = empty_errarg, const errarg &arg2 = empty_errarg, const errarg &arg3 = empty_errarg);
extern void push_body (const char *s);
extern void yyerror (const char *s);
// interface to parser in gram.cc
extern int yyparse();
extern void parse_init (void);
extern void parse_cleanup (void);
extern int delim_flag; // read-only variable
// Command-line flags in main.cc, used by lexer, parser, or driver
extern int command_char;
extern int compatible_flag;
extern int safer_flag;
extern int no_centering_flag;
|
