/src/serenity/Userland/Libraries/LibPDF/Reader.cpp
Line | Count | Source |
1 | | /* |
2 | | * Copyright (c) 2021, Matthew Olsson <mattco@serenityos.org> |
3 | | * |
4 | | * SPDX-License-Identifier: BSD-2-Clause |
5 | | */ |
6 | | |
7 | | #include <LibPDF/Reader.h> |
8 | | #include <ctype.h> |
9 | | |
10 | | namespace PDF { |
11 | | |
12 | | bool Reader::is_eol(char c) |
13 | 10.6M | { |
14 | 10.6M | return c == 0xa || c == 0xd; |
15 | 10.6M | } |
16 | | |
17 | | bool Reader::is_whitespace(char c) |
18 | 118k | { |
19 | 118k | return is_eol(c) || is_non_eol_whitespace(c); |
20 | 118k | } |
21 | | |
22 | | bool Reader::is_non_eol_whitespace(char c) |
23 | 112k | { |
24 | | // 3.1.1 Character Set |
25 | 112k | return c == 0 || c == 0x9 || c == 0xc || c == ' '; |
26 | 112k | } |
27 | | |
28 | | bool Reader::matches_eol() const |
29 | 10.5M | { |
30 | 10.5M | return !done() && is_eol(peek()); |
31 | 10.5M | } |
32 | | |
33 | | bool Reader::matches_whitespace() const |
34 | 118k | { |
35 | 118k | return !done() && is_whitespace(peek()); |
36 | 118k | } |
37 | | |
38 | | bool Reader::matches_non_eol_whitespace() const |
39 | 0 | { |
40 | 0 | return !done() && is_non_eol_whitespace(peek()); |
41 | 0 | } |
42 | | |
43 | | bool Reader::matches_number() const |
44 | 137 | { |
45 | 137 | if (done()) |
46 | 0 | return false; |
47 | 137 | auto ch = peek(); |
48 | 137 | return isdigit(ch) || ch == '-' || ch == '+' || ch == '.'; |
49 | 137 | } |
50 | | |
51 | | bool Reader::matches_delimiter() const |
52 | 283 | { |
53 | 283 | return matches_any('(', ')', '<', '>', '[', ']', '{', '}', '/', '%'); |
54 | 283 | } |
55 | | |
56 | | bool Reader::matches_regular_character() const |
57 | 283 | { |
58 | 283 | return !done() && !matches_delimiter() && !matches_whitespace(); |
59 | 283 | } |
60 | | |
61 | | bool Reader::consume_eol() |
62 | 104k | { |
63 | 104k | if (done()) { |
64 | 0 | return false; |
65 | 0 | } |
66 | 104k | if (matches("\r\n")) { |
67 | 1.98k | consume(2); |
68 | 1.98k | return true; |
69 | 1.98k | } |
70 | 102k | if (matches_eol()) { |
71 | 102k | consume(); |
72 | 102k | return true; |
73 | 102k | } |
74 | 10 | return false; |
75 | 102k | } |
76 | | |
77 | | bool Reader::consume_whitespace() |
78 | 104k | { |
79 | 104k | bool consumed = false; |
80 | 117k | while (matches_whitespace()) { |
81 | 13.1k | consumed = true; |
82 | 13.1k | consume(); |
83 | 13.1k | } |
84 | 104k | return consumed; |
85 | 104k | } |
86 | | |
87 | | bool Reader::consume_non_eol_whitespace() |
88 | 0 | { |
89 | 0 | bool consumed = false; |
90 | 0 | while (matches_non_eol_whitespace()) { |
91 | 0 | consumed = true; |
92 | 0 | consume(); |
93 | 0 | } |
94 | 0 | return consumed; |
95 | 0 | } |
96 | | |
97 | | char Reader::consume() |
98 | 120k | { |
99 | 120k | return read(); |
100 | 120k | } |
101 | | |
102 | | void Reader::consume(int amount) |
103 | 1.99k | { |
104 | 6.02k | for (size_t i = 0; i < static_cast<size_t>(amount); i++) |
105 | 4.02k | consume(); |
106 | 1.99k | } |
107 | | |
108 | | bool Reader::consume(char ch) |
109 | 111 | { |
110 | 111 | return consume() == ch; |
111 | 111 | } |
112 | | |
113 | | } |