| 43 | } |
| 44 | |
| 45 | size_t varint_get(const u8 *p, size_t max, varint_t *val) |
| 46 | { |
| 47 | if (max < 1) |
| 48 | return 0; |
| 49 | |
| 50 | switch (*p) { |
| 51 | case 0xfd: |
| 52 | if (max < 3) |
| 53 | return 0; |
| 54 | *val = ((u64)p[2] << 8) + p[1]; |
| 55 | return 3; |
| 56 | case 0xfe: |
| 57 | if (max < 5) |
| 58 | return 0; |
| 59 | *val = ((u64)p[4] << 24) + ((u64)p[3] << 16) |
| 60 | + ((u64)p[2] << 8) + p[1]; |
| 61 | return 5; |
| 62 | case 0xff: |
| 63 | if (max < 9) |
| 64 | return 0; |
| 65 | *val = ((u64)p[8] << 56) + ((u64)p[7] << 48) |
| 66 | + ((u64)p[6] << 40) + ((u64)p[5] << 32) |
| 67 | + ((u64)p[4] << 24) + ((u64)p[3] << 16) |
| 68 | + ((u64)p[2] << 8) + p[1]; |
| 69 | return 9; |
| 70 | default: |
| 71 | *val = *p; |
| 72 | return 1; |
| 73 | } |
| 74 | } |