/**
* filestream_read_file:
* @path : path to file.
* @buf : buffer to allocate and read the contents of the
* file into. Needs to be freed manually.
*
* Read the contents of a file into @buf.
*
* Returns: number of items read, -1 on error.
*/
int64_t filestream_read_file(const char *path, void **buf, int64_t *len)
{
int64_t ret = 0;
int64_t content_buf_size = 0;
void *content_buf = NULL;
RFILE *file = filestream_open(path,
RETRO_VFS_FILE_ACCESS_READ,
RETRO_VFS_FILE_ACCESS_HINT_NONE);
if (!file)
{
fprintf(stderr, "Failed to open %s: %s\n", path, strerror(errno));
goto error;
}
content_buf_size = filestream_get_size(file);
if (content_buf_size < 0)
goto error;
content_buf = malloc((size_t)(content_buf_size + 1));
if (!content_buf)
goto error;
if ((int64_t)(uint64_t)(content_buf_size + 1) != (content_buf_size + 1))
goto error;
ret = filestream_read(file, content_buf, (int64_t)content_buf_size);
if (ret < 0)
{
fprintf(stderr, "Failed to read %s: %s\n", path, strerror(errno));
goto error;
}
filestream_close(file);
*buf = content_buf;
/* Allow for easy reading of strings to be safe.
* Will only work with sane character formatting (Unix). */
((char*)content_buf)[ret] = '\0';
if (len)
*len = ret;
return 1;
error:
if (file)
filestream_close(file);
if (content_buf)
free(content_buf);
if (len)
*len = -1;
*buf = NULL;
return 0;
}
rxml_document_t *rxml_load_document(const char *path)
{
rxml_document_t *doc;
char *memory_buffer = NULL;
char *new_memory_buffer = NULL;
const char *mem_ptr = NULL;
long len = 0;
RFILE *file = filestream_open(path,
RETRO_VFS_FILE_ACCESS_READ,
RETRO_VFS_FILE_ACCESS_HINT_NONE);
if (!file)
return NULL;
doc = (rxml_document_t*)calloc(1, sizeof(*doc));
if (!doc)
goto error;
len = filestream_get_size(file);
memory_buffer = (char*)malloc(len + 1);
if (!memory_buffer)
goto error;
memory_buffer[len] = '\0';
if (filestream_read(file, memory_buffer, len) != (size_t)len)
goto error;
filestream_close(file);
file = NULL;
mem_ptr = memory_buffer;
if (!validate_header(&mem_ptr))
goto error;
new_memory_buffer = purge_xml_comments(mem_ptr);
if (!new_memory_buffer)
goto error;
free(memory_buffer);
mem_ptr = memory_buffer = new_memory_buffer;
doc->root_node = rxml_parse_node(&mem_ptr);
if (!doc->root_node)
goto error;
free(memory_buffer);
return doc;
error:
free(memory_buffer);
filestream_close(file);
rxml_free_document(doc);
return NULL;
}
int64_t intfstream_get_size(intfstream_internal_t *intf)
{
if (!intf)
return 0;
switch (intf->type)
{
case INTFSTREAM_FILE:
return filestream_get_size(intf->file.fp);
case INTFSTREAM_MEMORY:
return intf->memory.buf.size;
case INTFSTREAM_CHD:
/* TODO/FIXME - implement this */
break;
}
return 0;
}
int64_t intfstream_get_size(intfstream_internal_t *intf)
{
if (!intf)
return 0;
switch (intf->type)
{
case INTFSTREAM_FILE:
return filestream_get_size(intf->file.fp);
case INTFSTREAM_MEMORY:
return intf->memory.buf.size;
case INTFSTREAM_CHD:
#ifdef HAVE_CHD
return chdstream_get_size(intf->chd.fp);
#else
break;
#endif
}
return 0;
}
uint64_t FileStream::size(void)
{
if (!fp)
return -1;
return filestream_get_size(fp);
}
