common/zmod/inffast.c

93     unsigned op;                /* code bits, operation, extra bits, or */
131         op = (unsigned)(this.bits);
132         hold >>= op;
133         bits -= op;
134         op = (unsigned)(this.op);
135         if (op == 0) {                          /* literal */
141         else if (op & 16) {                     /* length base */
143             op &= 15;                           /* number of extra bits */
144             if (op) {
145                 if (bits < op) {
149                 len += (unsigned)hold & ((1U << op) - 1);
150                 hold >>= op;
151                 bits -= op;
162             op = (unsigned)(this.bits);
163             hold >>= op;
164             bits -= op;
165             op = (unsigned)(this.op);
166             if (op & 16) {                      /* distance base */
168                 op &= 15;                       /* number of extra bits */
169                 if (bits < op) {
172                     if (bits < op) {
177                 dist += (unsigned)hold & ((1U << op) - 1);
185                 hold >>= op;
186                 bits -= op;
188                 op = (unsigned)(out - beg);     /* max distance in output */
189                 if (dist > op) {                /* see if copy from window */
190                     op = dist - op;             /* distance back in window */
191                     if (op > whave) {
198                         from += wsize - op;
199                         if (op < len) {         /* some from window */
200                             len -= op;
203                             } while (--op);
207                     else if (write < op) {      /* wrap around window */
208                         from += wsize + write - op;
209                         op -= write;
210                         if (op < len) {         /* some from end of window */
211                             len -= op;
214                             } while (--op);
217                                 op = write;
218                                 len -= op;
221                                 } while (--op);
227                         from += write - op;
228                         if (op < len) {         /* some from window */
229                             len -= op;
232                             } while (--op);
263             else if ((op & 64) == 0) {          /* 2nd level distance code */
264                 this = dcode[this.val + (hold & ((1U << op) - 1))];
273         else if ((op & 64) == 0) {              /* 2nd level length code */
274             this = lcode[this.val + (hold & ((1U << op) - 1))];
277         else if (op & 32) {                     /* end-of-block */
309    - Different op definition to avoid & for extra bits (do & for table bits)