--------------------------------------------------------------- read --- */
| 46 | |
| 47 | /* --------------------------------------------------------------- read --- */ |
| 48 | size_t luaZ_read (ZIO *z, void *b, size_t n) { |
| 49 | while (n) { |
| 50 | size_t m; |
| 51 | if (z->n == 0) { /* no bytes in buffer? */ |
| 52 | if (luaZ_fill(z) == EOZ) /* try to read more */ |
| 53 | return n; /* no more input; return number of missing bytes */ |
| 54 | else { |
| 55 | z->n++; /* luaZ_fill consumed first byte; put it back */ |
| 56 | z->p--; |
| 57 | } |
| 58 | } |
| 59 | m = (n <= z->n) ? n : z->n; /* min. between n and z->n */ |
| 60 | memcpy(b, z->p, m); |
| 61 | z->n -= m; |
| 62 | z->p += m; |
| 63 | b = (char *)b + m; |
| 64 | n -= m; |
| 65 | } |
| 66 | return 0; |
| 67 | } |
| 68 |