72 	long n, slop;  in PackBitsEncode()  local
87 		n = 1;  in PackBitsEncode()
89 			n++;  in PackBitsEncode()
116 			if (n > 1) {  in PackBitsEncode()
118 				if (n > 128) {  in PackBitsEncode()
121 					n -= 128;  in PackBitsEncode()
124 				*op++ = (uint8)(-(n-1));  in PackBitsEncode()
134 			if (n > 1) {  in PackBitsEncode()
136 				if (n > 128) {  in PackBitsEncode()
139 					n -= 128;  in PackBitsEncode()
142 				*op++ = (uint8)(-(n-1));	/* encode run */  in PackBitsEncode()
151 			if (n > 1) {  in PackBitsEncode()
152 				if (n > 128) {  in PackBitsEncode()
155 					n -= 128;  in PackBitsEncode()
158 				*op++ = (uint8)(-(n-1));  in PackBitsEncode()
174 			if (n == 1 && op[-2] == (uint8) -1 &&  in PackBitsEncode()
221 	long n;  in PackBitsDecode()  local
228 		n = (long) *bp++;  in PackBitsDecode()
234 		if (n >= 128)  in PackBitsDecode()
235 			n -= 256;  in PackBitsDecode()
236 		if (n < 0) {		/* replicate next byte -n+1 times */  in PackBitsDecode()
237 			if (n == -128)	/* nop */  in PackBitsDecode()
239 			n = -n + 1;  in PackBitsDecode()
240 			if( occ < (tmsize_t)n )  in PackBitsDecode()
244 				    (unsigned long) ((tmsize_t)n - occ));  in PackBitsDecode()
245 				n = (long)occ;  in PackBitsDecode()
247 			occ -= n;  in PackBitsDecode()
250 			while (n-- > 0)  in PackBitsDecode()
253 			if (occ < (tmsize_t)(n + 1))  in PackBitsDecode()
257 				    (unsigned long) ((tmsize_t)n - occ + 1));  in PackBitsDecode()
258 				n = (long)occ - 1;  in PackBitsDecode()
260 			if (cc < (tmsize_t) (n+1))   in PackBitsDecode()
266 			_TIFFmemcpy(op, bp, ++n);  in PackBitsDecode()
267 			op += n; occ -= n;  in PackBitsDecode()
268 			bp += n; cc -= n;  in PackBitsDecode()