48         state->bits < 8
58     - The maximum input bits used by a length/distance pair is 15 bits for the
59       length code, 5 bits for the length extra, 15 bits for the distance code,
60       and 13 bits for the distance extra.  This totals 48 bits, or six bytes.
86     unsigned bits;              /* local strm->bits */  in inflate_fast()  local
92     unsigned op;                /* code bits, operation, extra bits, or */  in inflate_fast()
121     bits = state->bits;  in inflate_fast()
130         if (bits < 15) {  in inflate_fast()
131             hold += (unsigned long)(PUP(in)) << bits;  in inflate_fast()
132             bits += 8;  in inflate_fast()
133             hold += (unsigned long)(PUP(in)) << bits;  in inflate_fast()
134             bits += 8;  in inflate_fast()
138         op = (unsigned)(this.bits);  in inflate_fast()
140         bits -= op;  in inflate_fast()
150             op &= 15;                           /* number of extra bits */  in inflate_fast()
152                 if (bits < op) {  in inflate_fast()
153                     hold += (unsigned long)(PUP(in)) << bits;  in inflate_fast()
154                     bits += 8;  in inflate_fast()
158                 bits -= op;  in inflate_fast()
161             if (bits < 15) {  in inflate_fast()
162                 hold += (unsigned long)(PUP(in)) << bits;  in inflate_fast()
163                 bits += 8;  in inflate_fast()
164                 hold += (unsigned long)(PUP(in)) << bits;  in inflate_fast()
165                 bits += 8;  in inflate_fast()
169             op = (unsigned)(this.bits);  in inflate_fast()
171             bits -= op;  in inflate_fast()
175                 op &= 15;                       /* number of extra bits */  in inflate_fast()
176                 if (bits < op) {  in inflate_fast()
177                     hold += (unsigned long)(PUP(in)) << bits;  in inflate_fast()
178                     bits += 8;  in inflate_fast()
179                     if (bits < op) {  in inflate_fast()
180                         hold += (unsigned long)(PUP(in)) << bits;  in inflate_fast()
181                         bits += 8;  in inflate_fast()
193                 bits -= op;  in inflate_fast()
325     /* return unused bytes (on entry, bits < 8, so in won't go too far back) */  in inflate_fast()
326     len = bits >> 3;  in inflate_fast()
328     bits -= len << 3;  in inflate_fast()
329     hold &= (1U << bits) - 1;  in inflate_fast()
338     state->bits = bits;  in inflate_fast()
345    - Different op definition to avoid & for extra bits (do & for table bits)