115 lines
2.8 KiB
C++
115 lines
2.8 KiB
C++
/**
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This file is a part of rexy's general purpose library
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Copyright (C) 2020 rexy712
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "rexy/filerd.hpp"
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#include <cstdio> //fopen, fclose
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#include <utility> //exchange, swap
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#include <type_traits>
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namespace rexy{
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filerd::filerd(const char* f, const char* mode)noexcept:
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m_fp(fopen(f, mode)){}
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filerd::~filerd(void)noexcept{
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if(m_fp)
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fclose(m_fp);
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}
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void filerd::reset(FILE* fp)noexcept{
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if(m_fp)
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fclose(m_fp);
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m_fp = fp;
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}
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FILE* filerd::release(void)noexcept{
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return std::exchange(m_fp, nullptr);
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}
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size_t filerd::length(void)noexcept{
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if(!m_fp)
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return 0;
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size_t tmp, ret;
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tmp = ftell(m_fp);
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fseek(m_fp, 0, SEEK_END);
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ret = ftell(m_fp);
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fseek(m_fp, tmp, SEEK_SET);
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return ret;
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}
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size_t filerd::position(void)const noexcept{
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return ftell(m_fp);
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}
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void filerd::rewind(size_t pos)noexcept{
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fseek(m_fp, pos, SEEK_SET);
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}
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filerd::operator FILE*(void)noexcept{
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return m_fp;
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}
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filerd::operator const FILE*(void)const noexcept{
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return m_fp;
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}
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FILE* filerd::get(void)noexcept{
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return m_fp;
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}
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const FILE* filerd::get(void)const noexcept{
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return m_fp;
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}
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filerd::operator bool(void)const noexcept{
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return m_fp;
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}
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size_t filerd::read(char* dest, size_t bytes)noexcept{
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return fread(dest, 1, bytes, m_fp);
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}
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rexy::string filerd::read(size_t bytes)noexcept{
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rexy::string ret;
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char* tmp = ret.allocator().allocate(bytes);
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size_t written = read(tmp, bytes);
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ret.reset(tmp, written);
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return ret;
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}
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rexy::string filerd::readln(size_t max)noexcept{
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rexy::string ret;
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int c;
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size_t count = 0;
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for(c = fgetc(m_fp);c != EOF && c != '\n';c = fgetc(m_fp)){
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char ch = c;
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ret.append(&ch, 1);
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if(++count == max)
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break;
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}
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return ret;
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}
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rexy::binary filerd::read_bin(size_t bytes)
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noexcept(std::is_nothrow_constructible<rexy::binary, rexy::steal<char*>, size_t, size_t>::value)
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{
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rexy::binary ret;
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char* tmp = ret.allocator().allocate(bytes);
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size_t written = read(tmp, bytes);
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ret.reset(tmp, written);
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return ret;
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}
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size_t filerd::write(const char* c, size_t bytes)noexcept{
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return fwrite(c, 1, bytes, m_fp);
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}
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size_t filerd::write(const rexy::string_base<char>& c)noexcept{
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return write(c.get(), c.length());
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}
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}
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