blog/cpp/fonts/reader/file.cpp

#include "file.h"
#include <cstring>
#include <sstream>
#include <endian.h>

file::file(const char *filePath) : reader()
{
    fp.open(filePath, std::ios::binary);
    if (!fp.is_open())
    {
        throw "file now open";
    }
    path = new char[std::strlen(filePath)];
    std::memcpy(path, filePath, std::strlen(filePath));
    fp.seekg(0, fp.end);
    length = fp.tellg();
    fp.seekg(0, fp.beg);
};

std::streamsize file::read(char *bytes, uint16_t l)
{
    fp.read(bytes, l);
    std::streamsize bytesRead = fp.gcount();
    return bytesRead;
};

int8_t file::readInt8()
{
    int8_t ret = 0;
    fp.read(reinterpret_cast<char *>(&ret), sizeof(ret));
    return htobe16(ret);
}

int16_t file::readInt16()
{
    int16_t ret = 0;
    fp.read(reinterpret_cast<char *>(&ret), sizeof(ret));
    return htobe16(ret);
};

int32_t file::readInt32()
{
    int32_t ret = 0;
    fp.read(reinterpret_cast<char *>(&ret), sizeof(ret));
    return htobe16(ret);
}

int64_t file::readInt64()
{
    uint64_t ret = 0;
    fp.read(reinterpret_cast<char *>(&ret), sizeof(ret));
    return htobe16(ret);
}

uint8_t file::readUint8()
{
    uint8_t ret = 0;
    fp.read(reinterpret_cast<char *>(&ret), sizeof(ret));
    return ret;
}

uint16_t file::readUint16()
{
    uint16_t ret = 0;
    fp.read(reinterpret_cast<char *>(&ret), sizeof(ret));
    return htobe16(ret);
};

uint24_t file::readUint24()
{
    uint24_t ret(0);
    fp >> ret;
    return ret;
}

uint32_t file::readUint32()
{
    uint32_t ret = 0;
    fp.read(reinterpret_cast<char *>(&ret), sizeof(ret));
    return htobe32(ret);
}

uint64_t file::readUint64()
{
    uint64_t ret = 0;
    fp.read(reinterpret_cast<char *>(&ret), sizeof(ret));
    return htobe64(ret);
}

std::string file::readString(int l)
{
    char *data = new char[l];
    fp.read(data, l);
    std::streamsize bytesRead = fp.gcount();
    auto ret = std::string(data, bytesRead);
    delete[] data;
    return ret;
}

FWORD file::readFWord(){
    return readInt16();
}
UFWORD file::readUFWord(){
    return readUint16();
}
Offset8 file::readOffset8(){
    return readUint8();
}
Offset16 file::readOffset16(){
    return readUint16();
}
Offset24 file::readOffset24(){
    return readUint24();
}
Offset32 file::readOffset32(){
    return readUint32();
}
int24_t file::readInt24(){
    int24_t i;
    fp>>i;
    return i;
}
Fixed file::readFixed(){
    Fixed f;
    fp>>f;
    return f;
}
F2DOT14 file::readF2Dot14(){
    F2DOT14 f;
    fp>>f;
    return f;
}
Version16Dot16 file::readVersion16Dot16(){
    Version16Dot16 v;
    fp>>v;
    return v;
}
Tag file::readTag(){
    Tag t;
    fp>>t;
    return t;
}

bool file::seek(int64_t i)
{
    if (i > length)
    {
        return false;
    }
    fp.seekg(i);
    return true;
}

std::streampos file::curr()
{
    return fp.tellg();
}

std::string file::getPath()
{
    return path;
}

file::~file()
{
    if (fp.is_open())
    {
        fp.close();
    }
    if (path != nullptr)
    {
        delete path;
    }
}