gmio/src/c/stream.c

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C
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#include "stream.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
struct _internal_foug_stream
{
void* cookie;
foug_stream_manip_t manip;
};
foug_stream_t* foug_stream_create(foug_malloc_func_t func, void* data, foug_stream_manip_t manip)
{
if (func == NULL)
return NULL;
foug_stream_t* stream = (*func)(sizeof(struct _internal_foug_stream));
if (stream != NULL) {
stream->cookie = data;
stream->manip = manip;
}
return stream;
}
foug_stream_manip_t foug_stream_manip_null()
{
foug_stream_manip_t manip;
memset(&manip, 0, sizeof(foug_stream_manip_t));
return manip;
}
static foug_bool foug_stream_stdio_at_end(foug_stream_t* stream)
{
return feof((FILE*) stream->cookie);
}
static foug_int32 foug_stream_stdio_seek(foug_stream_t* stream, foug_int64 pos)
{
return fseek((FILE*) stream->cookie, pos, SEEK_SET);
}
static foug_uint64 foug_stream_stdio_read(foug_stream_t* stream, char* s, foug_uint64 max_size)
{
return fread(s, sizeof(char), max_size, (FILE*) stream->cookie);
}
static foug_uint64 foug_stream_stdio_write(foug_stream_t* stream,
const char* s,
foug_uint64 max_size)
{
return fwrite(s, sizeof(char), max_size, (FILE*) stream->cookie);
}
foug_stream_manip_t foug_stream_manip_stdio()
{
foug_stream_manip_t manip;
manip.at_end_func = &foug_stream_stdio_at_end;
manip.seek_func = &foug_stream_stdio_seek;
manip.read_func = &foug_stream_stdio_read;
manip.write_func = &foug_stream_stdio_write;
return manip;
}
foug_bool foug_stream_at_end(foug_stream_t* stream)
{
if (stream != NULL && stream->manip.at_end_func != NULL)
return (*(stream->manip.at_end_func))(stream);
return 0;
}
foug_int32 foug_stream_seek(foug_stream_t* stream, foug_int64 max_size)
{
if (stream != NULL && stream->manip.seek_func != NULL)
return (*(stream->manip.seek_func))(stream, max_size);
return -1;
}
foug_uint64 foug_stream_read(foug_stream_t* stream, char* s, foug_uint64 max_size)
{
if (stream != NULL && stream->manip.read_func != NULL)
return (*(stream->manip.read_func))(stream, s, max_size);
return 0;
}
foug_uint64 foug_stream_write(foug_stream_t* stream, const char* s, foug_uint64 max_size)
{
if (stream != NULL && stream->manip.write_func != NULL)
return (*(stream->manip.write_func))(stream, s, max_size);
return 0;
}
void* foug_stream_get_cookie(const foug_stream_t* stream)
{
return stream != NULL ? stream->cookie : NULL;
}