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
|
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <AK/String.h>
#include <AK/Vector.h>
#include <LibCore/CArgsParser.h>
#include <stdio.h>
#include <string.h>
int main(int argc, char** argv)
{
CArgsParser args_parser("nl");
args_parser.add_arg("b", "type", "Line count type. \n\tt counts non-empty lines. \n\ta counts all lines. \n\tn counts no lines.");
args_parser.add_arg("i", "incr", "Set line count increment.");
args_parser.add_arg("s", "delim", "Set buffer between the line numbers and text. 1-63 bytes");
args_parser.add_arg("v", "startnum", "Initial value used to number logical page lines.");
args_parser.add_arg("w", "width", "The number of characters used for the line number.");
args_parser.add_single_value("file");
CArgsParserResult args = args_parser.parse(argc, argv);
bool all_lines_flag = false;
bool line_numbers_flag = true;
String value_of_b;
if (args.is_present("b")) {
value_of_b = args.get("b");
if (value_of_b == "a")
all_lines_flag = true;
else if (value_of_b == "t")
all_lines_flag = false;
else if (value_of_b == "n")
line_numbers_flag = false;
else {
args_parser.print_usage();
return 1;
}
}
long line_number_increment = 1;
String value_of_i;
if (args.is_present("i")) {
value_of_i = args.get("i");
line_number_increment = atol(value_of_i.characters());
if (!line_number_increment) {
args_parser.print_usage();
return 1;
}
}
bool delimiter_flag = false;
String value_of_s;
if (args.is_present("s")) {
value_of_s = args.get("s");
if (value_of_s.length() > 0 && value_of_s.length() < 64)
delimiter_flag = true;
else {
args_parser.print_usage();
return 1;
}
}
char delimiter[64];
strcpy(delimiter, delimiter_flag ? value_of_s.characters() : " ");
long line_number = 1;
String value_of_v;
if (args.is_present("v")) {
value_of_v = args.get("v");
line_number = atol(value_of_v.characters());
}
String value_of_w;
unsigned int line_number_width = 6;
if (args.is_present("w")) {
value_of_w = args.get("w");
line_number_width = atol(value_of_w.characters());
}
Vector<String> files = args.get_single_values();
Vector<FILE*> file_pointers;
if (files.size() > 0) {
for (auto& file : files) {
FILE* file_pointer;
if ((file_pointer = fopen(file.characters(), "r")) == NULL) {
fprintf(stderr, "unable to open %s\n", file.characters());
continue;
}
file_pointers.append(file_pointer);
}
} else {
file_pointers.append(stdin);
}
line_number -= line_number_increment; // so the line number can start at 1 when added below
for (auto& file_pointer : file_pointers) {
int previous_character = 0;
int next_character = 0;
while ((next_character = fgetc(file_pointer)) != EOF) {
if (previous_character == 0 || previous_character == '\n') {
if (!all_lines_flag && next_character == '\n') {
// skips printing line count on empty lines if all_lines_flags is false
printf("\n");
continue;
}
if (line_numbers_flag)
printf("%*lu%s", line_number_width, (line_number += line_number_increment), delimiter);
else
printf("%*s", line_number_width, "");
}
putchar(next_character);
previous_character = next_character;
}
fclose(file_pointer);
if (previous_character != '\n')
printf("\n"); // for cases where files have no trailing newline
}
return 0;
}
|
