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