qmi-codegen: fix printing contents of structs with fixed sized strings

If the fixed sized string contains no characters or is shorter than the explicit
size, NUL bytes will be included. If we try to append exactly the size of the
string, we'll end up with embedded NULs in our string to print, so the actual
output will be cut, even if the string is longer after the embedded NUL bytes.

E.g.:

    >>>>>> TLV:
    >>>>>>   type       = "GERAN Info" (0x10)
    >>>>>>   length     = 61
    >>>>>>   value      = 00:00:00:00:00:00:00:00:00:00:00:00:FF:FF:FF:FF:28:00:03:7D:6F:00:00:32:F4:51:B3:00:4D:00:11:2A:00:8A:3C:00:00:32:F4:51:B3:00:63:00:30:14:00:89:3C:00:00:32:F4:51:B3:00:59:00:11:0D:00
    >>>>>>   translated = [ cell_id = '0' plmn = '

With this fix, we avoid this by explicitly finishing ourselves the fixed sized
string with a NUL byte, and then adding the C string as the non-fixed sized
ones, i.e. until the first NUL byte is found.

E.g.:

    >>>>>> TLV:
    >>>>>>   type       = "GERAN Info" (0x10)
    >>>>>>   length     = 61
    >>>>>>   value      = 00:00:00:00:00:00:00:00:00:00:00:00:FF:FF:FF:FF:28:00:03:7D:6F:00:00:32:F4:51:B3:00:4D:00:11:2A:00:8A:3C:00:00:32:F4:51:B3:00:63:00:30:14:00:89:3C:00:00:32:F4:51:B3:00:59:00:11:0D:00
    >>>>>>   translated = [ cell_id = '0' plmn = '' lac = '0' geran_absolute_rf_channel_number = '0' base_station_identity_code = '0' timing_advance = '4294967295' rx_level = '40' cell = '{ [0] = '[ cell_id = '28541' plmn = '2\xf4Q' lac = '179' geran_absolute_rf_channel_number = '77' base_station_identity_code = '17' rx_level = '42' ] ' [1] = '[ cell_id = '15498' plmn = '2\xf4Q' lac = '179' geran_absolute_rf_channel_number = '99' base_station_identity_code = '48' rx_level = '20' ] ' [2] = '[ cell_id = '15497' plmn = '2\xf4Q' lac = '179' geran_absolute_rf_channel_number = '89' base_station_identity_code = '17' rx_level = '13' ] '}' ]

0 files changed, 0 insertions, 0 deletions