113 lines
1.9 KiB
C++
113 lines
1.9 KiB
C++
/*
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* Copyright (c) 2021, Matthew Olsson <mattco@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibPDF/Reader.h>
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#include <ctype.h>
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namespace PDF {
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bool Reader::is_eol(char c)
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{
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return c == 0xa || c == 0xd;
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}
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bool Reader::is_whitespace(char c)
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{
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return is_eol(c) || is_non_eol_whitespace(c);
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}
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bool Reader::is_non_eol_whitespace(char c)
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{
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// 3.1.1 Character Set
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return c == 0 || c == 0x9 || c == 0xc || c == ' ';
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}
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bool Reader::matches_eol() const
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{
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return !done() && is_eol(peek());
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}
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bool Reader::matches_whitespace() const
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{
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return !done() && is_whitespace(peek());
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}
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bool Reader::matches_non_eol_whitespace() const
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{
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return !done() && is_non_eol_whitespace(peek());
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}
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bool Reader::matches_number() const
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{
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if (done())
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return false;
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auto ch = peek();
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return isdigit(ch) || ch == '-' || ch == '+' || ch == '.';
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}
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bool Reader::matches_delimiter() const
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{
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return matches_any('(', ')', '<', '>', '[', ']', '{', '}', '/', '%');
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}
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bool Reader::matches_regular_character() const
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{
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return !done() && !matches_delimiter() && !matches_whitespace();
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}
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bool Reader::consume_eol()
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{
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if (done()) {
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return false;
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}
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if (matches("\r\n")) {
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consume(2);
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return true;
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}
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if (matches_eol()) {
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consume();
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return true;
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}
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return false;
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}
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bool Reader::consume_whitespace()
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{
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bool consumed = false;
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while (matches_whitespace()) {
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consumed = true;
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consume();
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}
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return consumed;
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}
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bool Reader::consume_non_eol_whitespace()
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{
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bool consumed = false;
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while (matches_non_eol_whitespace()) {
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consumed = true;
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consume();
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}
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return consumed;
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}
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char Reader::consume()
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{
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return read();
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}
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void Reader::consume(int amount)
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{
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for (size_t i = 0; i < static_cast<size_t>(amount); i++)
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consume();
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}
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bool Reader::consume(char ch)
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{
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return consume() == ch;
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}
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}
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