blob: c417dfde44fcd1e1e8c525a2e8a1043cf88c749c (
plain)
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
|
#include <string>
#include <iostream>
#include <boost/optional.hpp>
#include <boost/program_options.hpp>
#include "line_accumulator.h"
boost::optional<boost::program_options::variables_map> input(
int argc, char* argv[]) {
boost::program_options::options_description optionDescription(
"Supported options"
);
optionDescription.add_options()
(
"length",
boost::program_options::value<int>(),
"Output line length"
)
(
"offset",
boost::program_options::value<int>(),
"Number of spaces to be prepended on each line"
)
;
boost::program_options::variables_map variables;
try {
boost::program_options::store(
boost::program_options::parse_command_line(
argc, argv, optionDescription
),
variables
);
boost::program_options::notify(variables);
}
catch ( const std::exception& exception ) {
std::cerr << exception.what() << std::endl;
std::cout << optionDescription << std::endl;
return boost::optional<boost::program_options::variables_map>();
}
return boost::make_optional(variables);
}
bool process(const boost::program_options::variables_map& variables) {
std::cout.sync_with_stdio(false);
std::cin.sync_with_stdio(false);
std::uint8_t line_length = 60;
std::uint8_t line_offset = 0;
if ( variables.count("length") ) {
const int user_length = variables["length"].as<int>();
if ( user_length > 1 && user_length < 256 ) {
line_length = user_length;
} else {
std::cerr << "Invalid line length.\n";
return false;
}
}
if ( variables.count("offset") ) {
const int user_offset = variables["offset"].as<int>();
if ( user_offset >= 0 && user_offset < 256 ) {
line_offset = user_offset;
} else {
std::cerr << "Invalid line offset.\n";
return false;
}
}
justify::LineAccumulator acc{line_length, line_offset};
std::string token;
while ( std::cin.good() ) {
if ( std::cin >> token ) {
acc(token);
} else {
return true;
}
}
return true;
}
int main(int argc, char* argv[]) {
if ( auto variables = input(argc, argv) ) {
if ( process(*variables) ) {
return 0;
} else {
return 1;
}
} else {
return 1;
}
}
|
