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#include <gu/file.h>
typedef struct GuFileOutStream GuFileOutStream;
struct GuFileOutStream {
GuOutStream stream;
FILE* file;
};
static size_t
gu_file_output(GuOutStream* stream, const uint8_t* buf, size_t len, GuExn* err)
{
GuFileOutStream* fos = gu_container(stream, GuFileOutStream, stream);
errno = 0;
size_t wrote = fwrite(buf, 1, len, fos->file);
if (wrote < len) {
if (ferror(fos->file)) {
gu_raise_errno(err);
}
}
return wrote;
}
static void
gu_file_flush(GuOutStream* stream, GuExn* err)
{
GuFileOutStream* fos = gu_container(stream, GuFileOutStream, stream);
errno = 0;
if (fflush(fos->file) != 0) {
gu_raise_errno(err);
}
}
GuOut*
gu_file_out(FILE* file, GuPool* pool)
{
GuFileOutStream* fos = gu_new(GuFileOutStream, pool);
fos->stream.begin_buf = NULL;
fos->stream.end_buf = NULL;
fos->stream.output = gu_file_output;
fos->stream.flush = gu_file_flush;
fos->file = file;
return gu_new_out(&fos->stream, pool);
}
typedef struct GuFileInStream GuFileInStream;
struct GuFileInStream {
GuInStream stream;
FILE* file;
};
static size_t
gu_file_input(GuInStream* stream, uint8_t* buf, size_t sz, GuExn* err)
{
GuFileInStream* fis = gu_container(stream, GuFileInStream, stream);
errno = 0;
size_t got = fread(buf, 1, sz, fis->file);
if (got == 0) {
if (ferror(fis->file)) {
gu_raise_errno(err);
}
}
return got;
}
GuIn*
gu_file_in(FILE* file, GuPool* pool)
{
GuFileInStream* fis = gu_new(GuFileInStream, pool);
fis->stream.begin_buffer = NULL;
fis->stream.end_buffer = NULL;
fis->stream.input = gu_file_input;
fis->file = file;
return gu_new_in(&fis->stream, pool);
}
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