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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
#include "parse_cst_to_ast_visitor.h"
#include "resolve_symbols_visitor.h"
#include "resolve_literals_visitor.h"
#include "resolve_regexes_visitor.h"
#include "inline_simple_visitor.h"
#include "unroll_repetitions_visitor.h"
#include "bison_output_visitor.h"
#include "lex_output_visitor.h"
#include <parse_cst_parse.hpp>
#include <parse_cst_lex.hpp>
#include "errors.h"
#include <iostream>
#include <fstream>
#include <list>
#include <string>
extern int parse_cst_parse(yyscan_t scanner, ::foundry::parse::cst::start *&ret);
int go(int argc, char **argv);
int main(int argc, char **argv)
{
using namespace foundry::parse;
try
{
return go(argc, argv);
}
catch(internal_error &e)
{
std::cerr << e.what() << std::endl;
return 2;
}
catch(input_error &e)
{
std::cerr << e.what() << std::endl;
return 1;
}
}
int go(int argc, char **argv)
{
using namespace foundry::parse;
typedef char const *const *arg_iterator;
arg_iterator const args_begin = &argv[1];
arg_iterator const args_end = &argv[argc];
enum {
yacc,
lex
} output_format = yacc;
enum {
initial,
expect_output
} state = initial;
typedef std::string file;
typedef std::list<file> file_list;
file_list inputs;
file output;
bool verbose = false;
for(arg_iterator i = args_begin; i != args_end; ++i)
{
std::string const arg(*i);
switch(state)
{
case initial:
if(arg == "-v")
verbose = true;
else if(arg == "-y")
output_format = yacc;
else if(arg == "-l")
output_format = lex;
else if(arg == "-o")
state = expect_output;
else
inputs.push_back(arg);
break;
case expect_output:
output = arg;
state = initial;
break;
}
}
switch(state)
{
case initial:
break;
case expect_output:
std::cerr << "E: Option -o requires an argument" << std::endl;
return 1;
}
if(inputs.empty())
{
std::cerr << "E: No input file given" << std::endl;
return 1;
}
std::string const basename = inputs.front().substr(0, inputs.front().find('.'));
if(output.empty())
{
std::cerr << "E: No output file given" << std::endl;
return 1;
}
yyscan_t scanner;
parse_cst_lex_init(&scanner);
cst_to_ast_visitor v;
for(file_list::const_iterator i = inputs.begin(); i != inputs.end(); ++i)
{
FILE *f = fopen(i->c_str(), "r");
if(!f)
continue;
parse_cst_restart(f, scanner);
cst::start *start;
parse_cst_parse(scanner, start);
start->apply(v);
}
parse_cst_lex_destroy(scanner);
root_ptr r = v.get_root();
resolve_symbols_visitor resolve_symbols(verbose);
r->apply(resolve_symbols);
resolve_literals_visitor resolve_literals(verbose);
r->apply(resolve_literals);
resolve_regexes_visitor resolve_regexes(verbose);
r->apply(resolve_regexes);
inline_simple_visitor inline_simple(verbose);
r->apply(inline_simple);
unroll_repetitions_visitor unroll_repetitions(verbose);
r->apply(unroll_repetitions);
std::ofstream out(output.c_str());
switch(output_format)
{
case yacc:
{
bison_output_visitor yaccout(basename, out);
r->apply(yaccout);
}
break;
case lex:
{
lex_output_visitor lexout(basename, out);
r->apply(lexout);
}
break;
}
return 0;
}
|
