| 32 | } |
| 33 | |
| 34 | bool bech32_pull_bits(u8 **data, const u5 *src, size_t nbits) |
| 35 | { |
| 36 | size_t i; |
| 37 | size_t data_len = tal_count(*data); |
| 38 | size_t pad = nbits % 8; |
| 39 | |
| 40 | /* More than 4 padding bits means a superfluous u5 group was added. */ |
| 41 | if (pad >= 5) |
| 42 | return false; |
| 43 | |
| 44 | for (i = 0; i + 8 <= nbits; i += 8) { |
| 45 | tal_resize(data, data_len+1); |
| 46 | (*data)[data_len] = 0; |
| 47 | for (size_t b = 0; b < 8; b++) { |
| 48 | (*data)[data_len] <<= 1; |
| 49 | (*data)[data_len] |= get_u5_bit(src, i+b); |
| 50 | } |
| 51 | data_len++; |
| 52 | } |
| 53 | |
| 54 | /* Padding bits must all be zero. */ |
| 55 | for (size_t b = 0; b < pad; b++) { |
| 56 | if (get_u5_bit(src, i + b)) |
| 57 | return false; |
| 58 | } |
| 59 | return true; |
| 60 | } |
| 61 | |
| 62 | /* Returns a char, tracks case. */ |
| 63 | static int fixup_char(int c, bool *upper, bool *lower) |
no test coverage detected