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#include <rez/file.h>
#include <rez/entry.h>
#include <rez/resource.h>
#include <cstddef>
#include <iostream>
std::string rez::file::path() const
{
return resource.name();
}
long rez::file::tell()
{
return offset;
}
int rez::file::seek(long offset)
{
if (offset < 0 || offset > resource.entry.size)
return -1;
else if (io.seek(resource.entry.pos + offset))
return -1;
this->offset = offset;
return 0;
}
int rez::file::eof() const
{
return offset >= resource.entry.size;
}
int rez::file::read(void *b, size_t n)
{
const rez::entry &entry = resource.entry;
unsigned long roffset = offset + entry.pos,
end = entry.pos + entry.size, remaining = end - roffset;
if (n > remaining)
{
std::cerr << path() << ": requested " << n << " bytes, only "
<< remaining << " remaining" << std::endl;
return -1;
}
if (seek(offset) || io.read(b, n))
return -1;
offset += n;
return 0;
}
int rez::file::read(unsigned char &b)
{
return read(&b, sizeof b);
}
int rez::file::read(std::string &s, size_t len)
{
for (size_t i = 0; i < len; i++)
{
char b;
if (read(&b, sizeof b))
return -1;
s += b;
}
return 0;
}
int rez::file::read_le(uint16_t &w)
{
unsigned char b[sizeof w];
if (read(b, sizeof b))
return -1;
w = b[0] | (b[1] << 8);
return 0;
}
int rez::file::read_le(uint32_t &w)
{
unsigned char b[sizeof w];
if (read(b, sizeof b))
return -1;
w = b[0] | (b[1] << 8u) | (b[2] << 16u) | (b[3] << 24u);
return 0;
}
rez::file::file(const rez::resource &resource, rez::io &io) :
resource(resource),
offset(0),
io(io)
{
}
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