int semihosting_get_flen(const char *file_name)
{
int file_handle, length;
assert(semihosting_connection_supported());
file_handle = semihosting_file_open(file_name, FOPEN_MODE_RB);
if (file_handle == -1)
return file_handle;
/* Find the length of the file */
length = semihosting_file_length(file_handle);
return semihosting_file_close(file_handle) ? -1 : length;
}
long semihosting_download_file(const char *file_name,
size_t buf_size,
uintptr_t buf)
{
long ret = -EINVAL;
size_t length;
long file_handle;
/* Null pointer check */
if (!buf)
return ret;
assert(semihosting_connection_supported());
file_handle = semihosting_file_open(file_name, FOPEN_MODE_RB);
if (file_handle == -1)
return ret;
/* Find the actual length of the file */
length = semihosting_file_length(file_handle);
if (length == -1)
goto semihosting_fail;
/* Signal error if we do not have enough space for the file */
if (length > buf_size)
goto semihosting_fail;
/*
* A successful read will return 0 in which case we pass back
* the actual number of bytes read. Else we pass a negative
* value indicating an error.
*/
ret = semihosting_file_read(file_handle, &length, buf);
if (ret)
goto semihosting_fail;
else
ret = length;
semihosting_fail:
semihosting_file_close(file_handle);
return ret;
}
return 0;
}
/* Open a file on the semi-hosting device */
static int sh_file_open(io_dev_info_t *dev_info __unused,
const uintptr_t spec, io_entity_t *entity)
{
int result = -ENOENT;
long sh_result;
const io_file_spec_t *file_spec = (const io_file_spec_t *)spec;
assert(file_spec != NULL);
assert(entity != NULL);
sh_result = semihosting_file_open(file_spec->path, file_spec->mode);
if (sh_result > 0) {
entity->info = (uintptr_t)sh_result;
result = 0;
}
return result;
}
/* Seek to a particular file offset on the semi-hosting device */
static int sh_file_seek(io_entity_t *entity, int mode, ssize_t offset)
{
long file_handle, sh_result;
assert(entity != NULL);
