26     state->bits = 0;  in inflateReset()
185         bits = state->bits; \
196         state->bits = bits; \
203         bits = 0; \
212         hold += (unsigned long)(*next++) << bits; \
213         bits += 8; \
216 /* Assure that there are at least n bits in the bit accumulator.  If there is
220         while (bits < (unsigned)(n)) \
224 /* Return the low n bits of the bit accumulator (n < 16) */
225 #define BITS(n) \  macro
228 /* Remove n bits from the bit accumulator */
232         bits -= (unsigned)(n); \
235 /* Remove zero to seven bits as needed to go to a byte boundary */
238         hold >>= bits & 7; \
239         bits -= bits & 7; \
267    the requested bits are not available.  The typical use of the BITS macros
271         ... do something with BITS(n) ...
275    input left to load n bits into the accumulator, or it continues.  BITS(n)
276    gives the low n bits in the accumulator.  When done, DROPBITS(n) drops
277    the low n bits off the accumulator.  INITBITS() clears the accumulator
278    and sets the number of available bits to zero.  BYTEBITS() discards just
279    enough bits to put the accumulator on a byte boundary.  After BYTEBITS()
280    and a NEEDBITS(8), then BITS(8) would return the next byte in the stream.
296             keep[want++] = BITS(n);
335     unsigned bits;              /* bits in bit buffer */  in inflate()  local
341     unsigned len;               /* length to copy for repeats, bits to drop */  in inflate()
382                 ((BITS(8) << 8) + (hold >> 8)) % 31) {  in inflate()
387             if (BITS(4) != Z_DEFLATED) {  in inflate()
393             len = BITS(4) + 8;  in inflate()
555             state->last = BITS(1);  in inflate()
557             switch (BITS(2)) {  in inflate()
612             state->nlen = BITS(5) + 257;  in inflate()
614             state->ndist = BITS(5) + 1;  in inflate()
616             state->ncode = BITS(4) + 4;  in inflate()
631                 state->lens[order[state->have++]] = (unsigned short)BITS(3);  in inflate()
652                     this = state->lencode[BITS(state->lenbits)];  in inflate()
653                     if ((unsigned)(this.bits) <= bits) break;  in inflate()
657                     NEEDBITS(this.bits);  in inflate()
658                     DROPBITS(this.bits);  in inflate()
663                         NEEDBITS(this.bits + 2);  in inflate()
664                         DROPBITS(this.bits);  in inflate()
671                         copy = 3 + BITS(2);  in inflate()
675                         NEEDBITS(this.bits + 3);  in inflate()
676                         DROPBITS(this.bits);  in inflate()
678                         copy = 3 + BITS(3);  in inflate()
682                         NEEDBITS(this.bits + 7);  in inflate()
683                         DROPBITS(this.bits);  in inflate()
685                         copy = 11 + BITS(7);  in inflate()
732                 this = state->lencode[BITS(state->lenbits)];  in inflate()
733                 if ((unsigned)(this.bits) <= bits) break;  in inflate()
740                             (BITS(last.bits + last.op) >> last.bits)];  in inflate()
741                     if ((unsigned)(last.bits + this.bits) <= bits) break;  in inflate()
744                 DROPBITS(last.bits);  in inflate()
746             DROPBITS(this.bits);  in inflate()
770                 state->length += BITS(state->extra);  in inflate()
777                 this = state->distcode[BITS(state->distbits)];  in inflate()
778                 if ((unsigned)(this.bits) <= bits) break;  in inflate()
785                             (BITS(last.bits + last.op) >> last.bits)];  in inflate()
786                     if ((unsigned)(last.bits + this.bits) <= bits) break;  in inflate()
789                 DROPBITS(last.bits);  in inflate()
791             DROPBITS(this.bits);  in inflate()
803                 state->offset += BITS(state->extra);  in inflate()
922     strm->data_type = state->bits + (state->last ? 64 : 0) +  in inflate()