uint64_t
unparse_path(char *buffer, EFI_DEVICE_PATH *path, uint16_t pathsize)
{
uint16_t parsed_length = 0;
char *p = buffer;
int exit_now = 0;
while (parsed_length < pathsize && !exit_now) {
switch (path->type) {
case 0x01:
p += unparse_hardware_path(p, path);
break;
case 0x02:
p += unparse_acpi_path(p, path);
break;
case 0x03:
p += unparse_messaging_path(p, path);
break;
case 0x04:
p += unparse_media_path(p, path);
break;
case 0x05:
p += unparse_bios_path(p, path);
break;
case 0x7F:
exit_now = 1;
break;
case 0xFF:
exit_now = 1;
break;
default:
printf("\nwierd path");
dump_raw_data(path, 4);
break;
}
// p += sprintf(p, "\\");
parsed_length += path->length;
path = (EFI_DEVICE_PATH *) ((uint8_t *)path + path->length);
}
return p - buffer;
}
ssize_t
unparse_path(char *buffer, size_t buffer_size,
EFI_DEVICE_PATH *path, uint16_t pathsize)
{
uint16_t parsed_length = 0;
char *p = buffer;
size_t needed;
off_t buf_offset = 0;
int exit_now = 0;
while (parsed_length < pathsize && !exit_now) {
switch (path->type) {
case 0x01:
needed = unparse_hardware_path(p + buf_offset,
buffer_size == 0 ? 0 : buffer_size - buf_offset,
path);
if (needed < 0)
return -1;
buf_offset += needed;
break;
case 0x02:
needed = unparse_acpi_path(p + buf_offset,
buffer_size == 0 ? 0 : buffer_size - buf_offset,
path);
if (needed < 0)
return -1;
buf_offset += needed;
break;
case 0x03:
needed = unparse_messaging_path(p + buf_offset,
buffer_size == 0 ? 0 : buffer_size - buf_offset,
path);
if (needed < 0)
return -1;
buf_offset += needed;
break;
case 0x04:
needed = unparse_media_path(p + buf_offset,
buffer_size == 0 ? 0 : buffer_size - buf_offset,
path);
if (needed < 0)
return -1;
buf_offset += needed;
break;
case 0x05:
needed = unparse_bios_path(p + buf_offset,
buffer_size == 0 ? 0 : buffer_size - buf_offset,
path);
if (needed < 0)
return -1;
buf_offset += needed;
break;
case 0x7F:
exit_now = 1;
break;
case 0xFF:
exit_now = 1;
break;
default:
needed = snprintf(p + buf_offset,
buffer_size == 0 ? 0 : buffer_size - buf_offset,
"Unknown(%d,%d,", path->type, path->subtype);
if (needed < 0)
return -1;
buf_offset += needed;
if (path->length + sizeof (END_DEVICE_PATH)
> (uint64_t)(pathsize - parsed_length)){
needed = snprintf(p + buf_offset,
buffer_size == 0
? 0
: buffer_size - buf_offset,
"invalid size)");
if (needed < 0)
return -1;
buf_offset += needed;
exit_now = 1;
} else {
needed = snprintf(p + buf_offset,
buffer_size == 0
? 0
: buffer_size - buf_offset,
"%d,", path->length);
if (needed < 0)
return -1;
buf_offset += needed;
needed = unparse_raw(p + buf_offset,
buffer_size == 0
? 0
: buffer_size - buf_offset,
(uint8_t *)path +
offsetof(EFI_DEVICE_PATH, data),
path->length);
if (needed < 0)
return -1;
buf_offset += needed;
needed = snprintf(p + buf_offset,
buffer_size == 0
? 0
: buffer_size - buf_offset,
")");
if (needed < 0)
return -1;
buf_offset += needed;
}
break;
}
// p += sprintf(p, "\\");
parsed_length += path->length;
path = (EFI_DEVICE_PATH *) ((uint8_t *)path + path->length);
}
return buf_offset;
}