summaryrefslogtreecommitdiff
path: root/src/XlibInt.c
blob: 172fc9e5332313cbea84471ae692492d02075876 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
/* $Xorg: XlibInt.c,v 1.8 2001/02/09 02:03:38 xorgcvs Exp $ */
/*

Copyright 1985, 1986, 1987, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
the above copyright notice appear in all copies and that both that
copyright notice and this permission notice appear in supporting
documentation.

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.

Except as contained in this notice, the name of The Open Group shall
not be used in advertising or otherwise to promote the sale, use or
other dealings in this Software without prior written authorization
from The Open Group.

*/
/* $XFree86: xc/lib/X11/XlibInt.c,v 3.38 2003/10/30 21:55:05 alanh Exp $ */

/*
 *	XlibInt.c - Internal support routines for the C subroutine
 *	interface library (Xlib) to the X Window System Protocol V11.0.
 */
#define NEED_EVENTS
#define NEED_REPLIES

#include "Xlibint.h"
#include <X11/Xpoll.h>
#include <X11/Xtrans.h>
#include <X11/extensions/xcmiscstr.h>
#include <stdio.h>

#ifdef XTHREADS
#include "locking.h"

/* these pointers get initialized by XInitThreads */
LockInfoPtr _Xglobal_lock = NULL;
void (*_XCreateMutex_fn)(LockInfoPtr) = NULL;
/* struct _XCVList *(*_XCreateCVL_fn)() = NULL; */
void (*_XFreeMutex_fn)(LockInfoPtr) = NULL;
void (*_XLockMutex_fn)(
    LockInfoPtr /* lock */
#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)
    , char * /* file */
    , int /* line */
#endif
    ) = NULL;
void (*_XUnlockMutex_fn)(
    LockInfoPtr /* lock */
#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)
    , char * /* file */
    , int /* line */
#endif
    ) = NULL;
xthread_t (*_Xthread_self_fn)(void) = NULL;

#define XThread_Self()	((*_Xthread_self_fn)())

#define UnlockNextReplyReader(d) if ((d)->lock) \
    (*(d)->lock->pop_reader)((d),&(d)->lock->reply_awaiters,&(d)->lock->reply_awaiters_tail)

#define QueueReplyReaderLock(d) ((d)->lock ? \
    (*(d)->lock->push_reader)(d,&(d)->lock->reply_awaiters_tail) : NULL)
#define QueueEventReaderLock(d) ((d)->lock ? \
    (*(d)->lock->push_reader)(d,&(d)->lock->event_awaiters_tail) : NULL)

#if defined(XTHREADS_WARN) || defined(XTHREADS_FILE_LINE)
#define InternalLockDisplay(d,wskip) if ((d)->lock) \
    (*(d)->lock->internal_lock_display)(d,wskip,__FILE__,__LINE__)
#else
#define InternalLockDisplay(d,wskip) if ((d)->lock) \
    (*(d)->lock->internal_lock_display)(d,wskip)
#endif

#else /* XTHREADS else */

#define UnlockNextReplyReader(d)   
#define UnlockNextEventReader(d)
#define InternalLockDisplay(d,wskip)

#endif /* XTHREADS else */ 

/* check for both EAGAIN and EWOULDBLOCK, because some supposedly POSIX
 * systems are broken and return EWOULDBLOCK when they should return EAGAIN
 */
#ifdef WIN32
#define ETEST() (WSAGetLastError() == WSAEWOULDBLOCK)
#else
#ifdef __CYGWIN__ /* Cygwin uses ENOBUFS to signal socket is full */
#define ETEST() (errno == EAGAIN || errno == EWOULDBLOCK || errno == ENOBUFS)
#else
#if defined(EAGAIN) && defined(EWOULDBLOCK)
#define ETEST() (errno == EAGAIN || errno == EWOULDBLOCK)
#else
#ifdef EAGAIN
#define ETEST() (errno == EAGAIN)
#else
#define ETEST() (errno == EWOULDBLOCK)
#endif /* EAGAIN */
#endif /* EAGAIN && EWOULDBLOCK */
#endif /* __CYGWIN__ */
#endif /* WIN32 */

#ifdef WIN32
#define ECHECK(err) (WSAGetLastError() == err)
#define ESET(val) WSASetLastError(val)
#else
#ifdef __UNIXOS2__
#define ECHECK(err) (errno == err)
#define ESET(val)
#else
#ifdef ISC
#define ECHECK(err) ((errno == err) || ETEST())
#else
#define ECHECK(err) (errno == err)
#endif
#define ESET(val) errno = val
#endif
#endif

#if defined(LOCALCONN) || defined(LACHMAN)
#ifdef EMSGSIZE
#define ESZTEST() (ECHECK(EMSGSIZE) || ECHECK(ERANGE))
#else
#define ESZTEST() ECHECK(ERANGE)
#endif
#else
#ifdef EMSGSIZE
#define ESZTEST() ECHECK(EMSGSIZE)
#endif
#endif

#ifdef __UNIXOS2__
#define select(n,r,w,x,t) os2ClientSelect(n,r,w,x,t)
#include <limits.h>
#define MAX_PATH _POSIX_PATH_MAX
#endif

#ifdef MUSTCOPY

#define STARTITERATE(tpvar,type,start,endcond) \
  { register char *cpvar; \
  for (cpvar = (char *) (start); endcond; ) { \
    type dummy; memcpy ((char *) &dummy, cpvar, SIZEOF(type)); \
    tpvar = &dummy;
#define ITERPTR(tpvar) cpvar
#define RESETITERPTR(tpvar,type,start) cpvar = start
#define INCITERPTR(tpvar,type) cpvar += SIZEOF(type)
#define ENDITERATE }}

#else

#define STARTITERATE(tpvar,type,start,endcond) \
  for (tpvar = (type *) (start); endcond; )
#define ITERPTR(tpvar) (char *)tpvar
#define RESETITERPTR(tpvar,type,start) tpvar = (type *) (start)
#define INCITERPTR(tpvar,type) tpvar++
#define ENDITERATE

#endif /* MUSTCOPY */

typedef union {
    xReply rep;
    char buf[BUFSIZE];
} _XAlignedBuffer;

static char *_XAsyncReply(
    Display *dpy,
    register xReply *rep,
    char *buf,
    register int *lenp,
    Bool discard);

static void _XProcessInternalConnection(
    Display *dpy,
    struct _XConnectionInfo *conn_info);

#define SEQLIMIT (65535 - (BUFSIZE / SIZEOF(xReq)) - 10)

/*
 * The following routines are internal routines used by Xlib for protocol
 * packet transmission and reception.
 *
 * _XIOError(Display *) will be called if any sort of system call error occurs.
 * This is assumed to be a fatal condition, i.e., XIOError should not return.
 *
 * _XError(Display *, xError *) will be called whenever an X_Error event is
 * received.  This is not assumed to be a fatal condition, i.e., it is
 * acceptable for this procedure to return.  However, XError should NOT
 * perform any operations (directly or indirectly) on the DISPLAY.
 *
 * Routines declared with a return type of 'Status' return 0 on failure,
 * and non 0 on success.  Routines with no declared return type don't 
 * return anything.  Whenever possible routines that create objects return
 * the object they have created.
 */

static xReq _dummy_request = {
	0, 0, 0
};

/*
 * This is an OS dependent routine which:
 * 1) returns as soon as the connection can be written on....
 * 2) if the connection can be read, must enqueue events and handle errors,
 * until the connection is writable.
 */
static void
_XWaitForWritable(
    Display *dpy
#ifdef XTHREADS
    ,
    xcondition_t cv		/* our reading condition variable */
#endif
    )
{
#ifdef USE_POLL
    struct pollfd filedes;
#else
    fd_set r_mask;
    fd_set w_mask;
#endif
    int nfound;

#ifdef USE_POLL
    filedes.fd = dpy->fd;
    filedes.events = 0;
#else
    FD_ZERO(&r_mask);
    FD_ZERO(&w_mask);
#endif

    for (;;) {
#ifdef XTHREADS
	/* We allow only one thread at a time to read, to minimize
	   passing of read data between threads.
	   Now, who is it?  If there is a non-NULL reply_awaiters and
	   we (i.e., our cv) are not at the head of it, then whoever
	   is at the head is the reader, and we don't read.
	   Otherwise there is no reply_awaiters or we are at the
	   head, having just appended ourselves.
	   In this case, if there is a event_awaiters, then whoever
	   is at the head of it got there before we did, and they are the
	   reader.

	   Last cases: no event_awaiters and we are at the head of
	   reply_awaiters or reply_awaiters is NULL: we are the reader,
	   since there is obviously no one else involved.

	   XXX - what if cv is NULL and someone else comes along after
	   us while we are waiting?
	   */
	   
	if (!dpy->lock ||
	    (!dpy->lock->event_awaiters &&
	     (!dpy->lock->reply_awaiters ||
	      dpy->lock->reply_awaiters->cv == cv)))
#endif
#ifdef USE_POLL
	    filedes.events = POLLIN;
	filedes.events |= POLLOUT;
#else
	FD_SET(dpy->fd, &r_mask);
        FD_SET(dpy->fd, &w_mask);
#endif

	do {
	    UnlockDisplay(dpy);
#ifdef USE_POLL
	    nfound = poll (&filedes, 1, -1);
#else
	    nfound = Select (dpy->fd + 1, &r_mask, &w_mask, NULL, NULL);
#endif
	    InternalLockDisplay(dpy, cv != NULL);
	    if (nfound < 0 && !ECHECK(EINTR))
		_XIOError(dpy);
	} while (nfound <= 0);

	if (
#ifdef USE_POLL
	    filedes.revents & POLLIN
#else
	    FD_ISSET(dpy->fd, &r_mask)
#endif
	    )
	{
	    _XAlignedBuffer buf;
	    BytesReadable_t pend;
	    register int len;
	    register xReply *rep;

	    /* find out how much data can be read */
	    if (_X11TransBytesReadable(dpy->trans_conn, &pend) < 0)
		_XIOError(dpy);
	    len = pend;

	    /* must read at least one xEvent; if none is pending, then
	       we'll just block waiting for it */
	    if (len < SIZEOF(xReply)
#ifdef XTHREADS
		|| dpy->async_handlers
#endif
		)
		len = SIZEOF(xReply);
		
	    /* but we won't read more than the max buffer size */
	    if (len > BUFSIZE) len = BUFSIZE;

	    /* round down to an integral number of XReps */
	    len = (len / SIZEOF(xReply)) * SIZEOF(xReply);

	    (void) _XRead (dpy, buf.buf, (long) len);

	    STARTITERATE(rep,xReply,buf.buf,len > 0) {
		if (rep->generic.type == X_Reply) {
                    int tmp = len;
		    RESETITERPTR(rep,xReply,
				 _XAsyncReply (dpy, rep,
					       ITERPTR(rep), &tmp, True));
                    len = tmp;
		    pend = len;
		} else {
		    if (rep->generic.type == X_Error)
			_XError (dpy, (xError *)rep);
		    else	/* must be an event packet */
			_XEnq (dpy, (xEvent *)rep);
		    INCITERPTR(rep,xReply);
		    len -= SIZEOF(xReply);
		}
	    } ENDITERATE
#ifdef XTHREADS
	    if (dpy->lock && dpy->lock->event_awaiters)
		ConditionSignal(dpy, dpy->lock->event_awaiters->cv);
#endif
	}
#ifdef USE_POLL
	if (filedes.revents & (POLLOUT|POLLHUP|POLLERR))
#else
	if (FD_ISSET(dpy->fd, &w_mask))
#endif
	{
#ifdef XTHREADS
	    if (dpy->lock) {
		ConditionBroadcast(dpy, dpy->lock->writers);
	    }
#endif
	    return;
	}
    }
}


#define POLLFD_CACHE_SIZE 5

/* initialize the struct array passed to poll() below */
Bool _XPollfdCacheInit(
    Display *dpy)
{
#ifdef USE_POLL
    struct pollfd *pfp;

    pfp = (struct pollfd *)Xmalloc(POLLFD_CACHE_SIZE * sizeof(struct pollfd));
    if (!pfp)
	return False;
    pfp[0].fd = dpy->fd;
    pfp[0].events = POLLIN;

    dpy->filedes = (XPointer)pfp;
#endif
    return True;
}

void _XPollfdCacheAdd(
    Display *dpy,
    int fd)
{
#ifdef USE_POLL
    struct pollfd *pfp = (struct pollfd *)dpy->filedes;

    if (dpy->im_fd_length <= POLLFD_CACHE_SIZE) {
	pfp[dpy->im_fd_length].fd = fd;
	pfp[dpy->im_fd_length].events = POLLIN;
    }
#endif
}

/* ARGSUSED */
void _XPollfdCacheDel(
    Display *dpy,
    int fd)			/* not used */
{
#ifdef USE_POLL
    struct pollfd *pfp = (struct pollfd *)dpy->filedes;
    struct _XConnectionInfo *conni;

    /* just recalculate whole list */
    if (dpy->im_fd_length <= POLLFD_CACHE_SIZE) {
	int loc = 1;
	for (conni = dpy->im_fd_info; conni; conni=conni->next) {
	    pfp[loc].fd = conni->fd;
	    pfp[loc].events = POLLIN;
	    loc++;
	}
    }
#endif
}

/* returns True iff there is an event in the queue newer than serial_num */

static Bool
_XNewerQueuedEvent(
    Display *dpy,
    int serial_num)
{
    _XQEvent *qev;

    if (dpy->next_event_serial_num == serial_num)
	return False;

    qev = dpy->head;
    while (qev) {
	if (qev->qserial_num >= serial_num) {
	    return True;
	}
	qev = qev->next;
    }
    return False;
}

static int
_XWaitForReadable(
  Display *dpy)
{
    int result;
    int fd = dpy->fd;
    struct _XConnectionInfo *ilist;  
    register int saved_event_serial = 0;
    int in_read_events = 0;
    register Bool did_proc_conni = False;
#ifdef USE_POLL
    struct pollfd *filedes;
#else
    fd_set r_mask;
    int highest_fd = fd;
#endif

#ifdef USE_POLL
    if (dpy->im_fd_length + 1 > POLLFD_CACHE_SIZE
	&& !(dpy->flags & XlibDisplayProcConni)) {
	/* XXX - this fallback is gross */
	int i;

	filedes = (struct pollfd *)Xmalloc(dpy->im_fd_length * sizeof(struct pollfd));
	filedes[0].fd = fd;
	filedes[0].events = POLLIN;
	for (ilist=dpy->im_fd_info, i=1; ilist; ilist=ilist->next, i++) {
	    filedes[i].fd = ilist->fd;
	    filedes[i].events = POLLIN;
	}
    } else {
	filedes = (struct pollfd *)dpy->filedes;
    }
#else
    FD_ZERO(&r_mask);
#endif
    for (;;) {
#ifndef USE_POLL
	FD_SET(fd, &r_mask);
	if (!(dpy->flags & XlibDisplayProcConni))
	    for (ilist=dpy->im_fd_info; ilist; ilist=ilist->next) {
		FD_SET(ilist->fd, &r_mask);
		if (ilist->fd > highest_fd)
		    highest_fd = ilist->fd;
	    }
#endif
	UnlockDisplay(dpy);
#ifdef USE_POLL
	result = poll(filedes,
		      (dpy->flags & XlibDisplayProcConni) ? 1 : 1+dpy->im_fd_length,
		      -1);
#else
	result = Select(highest_fd + 1, &r_mask, NULL, NULL, NULL);
#endif
	InternalLockDisplay(dpy, dpy->flags & XlibDisplayReply);
	if (result == -1 && !ECHECK(EINTR)) _XIOError(dpy);
	if (result <= 0)
	    continue;
#ifdef USE_POLL
	if (filedes[0].revents & (POLLIN|POLLHUP|POLLERR))
#else
	if (FD_ISSET(fd, &r_mask))
#endif
	    break;
	if (!(dpy->flags & XlibDisplayProcConni)) {
	    int i;

	    saved_event_serial = dpy->next_event_serial_num;
	    /* dpy flags can be clobbered by internal connection callback */
	    in_read_events = dpy->flags & XlibDisplayReadEvents;
	    for (ilist=dpy->im_fd_info, i=1; ilist; ilist=ilist->next, i++) {
#ifdef USE_POLL
		if (filedes[i].revents & POLLIN)
#else
		if (FD_ISSET(ilist->fd, &r_mask))
#endif
		{
		    _XProcessInternalConnection(dpy, ilist);
		    did_proc_conni = True;
		}
	    }
#ifdef USE_POLL
	    if (dpy->im_fd_length + 1 > POLLFD_CACHE_SIZE)
		Xfree(filedes);
#endif
	}
	if (did_proc_conni) {
	    /* some internal connection callback might have done an
	       XPutBackEvent.  We notice it here and if we needed an event,
	       we can return all the way. */
	    if (_XNewerQueuedEvent(dpy, saved_event_serial)
		&& (in_read_events
#ifdef XTHREADS
		    || (dpy->lock && dpy->lock->event_awaiters)
#endif
		    ))
		return -2;
	    did_proc_conni = False;
	}
    }
#ifdef XTHREADS
#ifdef XTHREADS_DEBUG
    printf("thread %x _XWaitForReadable returning\n", XThread_Self());
#endif
#endif
    return 0;
}

static
int _XSeqSyncFunction(
    register Display *dpy)
{
    xGetInputFocusReply rep;
    register xReq *req;

    LockDisplay(dpy);
    if ((dpy->request - dpy->last_request_read) >= (BUFSIZE / SIZEOF(xReq))) {
	GetEmptyReq(GetInputFocus, req);
	(void) _XReply (dpy, (xReply *)&rep, 0, xTrue);
    }
    /* could get XID handler while waiting for reply in MT env */
    if (dpy->synchandler == _XSeqSyncFunction) {
	dpy->synchandler = dpy->savedsynchandler;
	dpy->flags &= ~XlibDisplayPrivSync;
    }
    UnlockDisplay(dpy);
    SyncHandle();
    return 0;
}

#ifdef XTHREADS
static void _XFlushInt(
        register Display *dpy,
        register xcondition_t cv);
#endif

/*
 * _XFlush - Flush the X request buffer.  If the buffer is empty, no
 * action is taken.  This routine correctly handles incremental writes.
 * This routine may have to be reworked if int < long.
 */
void _XFlush(
	register Display *dpy)
{
#ifdef XTHREADS
    /* With multi-threading we introduce an internal routine to which
       we can pass a condition variable to do locking correctly. */

    _XFlushInt(dpy, NULL);
}

/* _XFlushInt - Internal version of _XFlush used to do multi-threaded
 * locking correctly.
 */

static void _XFlushInt(
	register Display *dpy,
        register xcondition_t cv)
{
#endif /* XTHREADS*/
	register long size, todo;
	register int write_stat;
	register char *bufindex;
	_XExtension *ext;

	/* This fix resets the bufptr to the front of the buffer so
	 * additional appends to the bufptr will not corrupt memory. Since
	 * the server is down, these appends are no-op's anyway but 
	 * callers of _XFlush() are not verifying this before they call it.
	 */
	if (dpy->flags & XlibDisplayIOError)
	{
	    dpy->bufptr = dpy->buffer;
	    dpy->last_req = (char *)&_dummy_request;
	    return;
	}

#ifdef XTHREADS
	while (dpy->flags & XlibDisplayWriting) {
	    if (dpy->lock) {
		ConditionWait(dpy, dpy->lock->writers);
	    } else {
		_XWaitForWritable (dpy, cv);
	    }
	}
#endif
	size = todo = dpy->bufptr - dpy->buffer;
	if (!size) return;
#ifdef XTHREADS
	dpy->flags |= XlibDisplayWriting;
	/* make sure no one else can put in data */
	dpy->bufptr = dpy->bufmax;
#endif
	for (ext = dpy->flushes; ext; ext = ext->next_flush)
	    (*ext->before_flush)(dpy, &ext->codes, dpy->buffer, size);
	bufindex = dpy->buffer;
	/*
	 * While write has not written the entire buffer, keep looping
	 * until the entire buffer is written.  bufindex will be
	 * incremented and size decremented as buffer is written out.
	 */
	while (size) {
	    ESET(0);
	    write_stat = _X11TransWrite(dpy->trans_conn,
					bufindex, (int) todo);
	    if (write_stat >= 0) {
		size -= write_stat;
		todo = size;
		bufindex += write_stat;
	    } else if (ETEST()) {
		_XWaitForWritable(dpy
#ifdef XTHREADS
				  , cv
#endif
				  );
#ifdef SUNSYSV
	    } else if (ECHECK(0)) {
		_XWaitForWritable(dpy
#ifdef XTHREADS
				  , cv
#endif
				  );
#endif
#ifdef ESZTEST
	    } else if (ESZTEST()) {
		if (todo > 1) 
		    todo >>= 1;
		else {
		    _XWaitForWritable(dpy
#ifdef XTHREADS
				      , cv
#endif
				      );
		}
#endif
	    } else if (!ECHECK(EINTR)) {
		/* Write failed! */
		/* errno set by write system call. */
		_XIOError(dpy);
	    }
	}
	dpy->last_req = (char *)&_dummy_request;
	if ((dpy->request - dpy->last_request_read) >= SEQLIMIT &&
	    !(dpy->flags & XlibDisplayPrivSync)) {
	    dpy->savedsynchandler = dpy->synchandler;
	    dpy->synchandler = _XSeqSyncFunction;
	    dpy->flags |= XlibDisplayPrivSync;
	}
	dpy->bufptr = dpy->buffer;
#ifdef XTHREADS
	dpy->flags &= ~XlibDisplayWriting;
#endif
}

int
_XEventsQueued(
    register Display *dpy,
    int mode)
{
	register int len;
	BytesReadable_t pend;
	_XAlignedBuffer buf;
	register xReply *rep;
	char *read_buf;
#ifdef XTHREADS
	int entry_event_serial_num;
	struct _XCVList *cvl = NULL;
	xthread_t self;

#ifdef XTHREADS_DEBUG
	printf("_XEventsQueued called in thread %x\n", XThread_Self());
#endif
#endif /* XTHREADS*/

	if (mode == QueuedAfterFlush)
	{
	    _XFlush(dpy);
	    if (dpy->qlen)
		return(dpy->qlen);
	}
	if (dpy->flags & XlibDisplayIOError) return(dpy->qlen);

#ifdef XTHREADS
	/* create our condition variable and append to list,
	 * unless we were called from within XProcessInternalConnection
	 * or XLockDisplay
	 */
	xthread_clear_id(self);
	if (dpy->lock && (xthread_have_id (dpy->lock->conni_thread)
			  || xthread_have_id (dpy->lock->locking_thread)))
	    /* some thread is in XProcessInternalConnection or XLockDisplay
	       so we have to see if we are it */
	    self = XThread_Self();
	if (!xthread_have_id(self)
	    || (!xthread_equal(self, dpy->lock->conni_thread)
		&& !xthread_equal(self, dpy->lock->locking_thread))) {
	    /* In the multi-threaded case, if there is someone else
	       reading events, then there aren't any available, so
	       we just return.  If we waited we would block.
	       */
	    if (dpy->lock && dpy->lock->event_awaiters)
		return dpy->qlen;
	    /* nobody here but us, so lock out any newcomers */
	    cvl = QueueEventReaderLock(dpy);
	}

	while (dpy->lock && cvl && dpy->lock->reply_first) {
	    /* note which events we have already seen so we'll know
	       if _XReply (in another thread) reads one */
	    entry_event_serial_num = dpy->next_event_serial_num;
	    ConditionWait(dpy, cvl->cv);
	    /* did _XReply read an event we can return? */
	    if (_XNewerQueuedEvent(dpy, entry_event_serial_num))
	    {
		UnlockNextEventReader(dpy);
		return 0;
	    }
	}
#endif /* XTHREADS*/

	if (_X11TransBytesReadable(dpy->trans_conn, &pend) < 0)
	    _XIOError(dpy);
#ifdef XCONN_CHECK_FREQ
	/* This is a crock, required because FIONREAD or equivalent is
	 * not guaranteed to detect a broken connection.
	 */
	if (!pend && !dpy->qlen && ++dpy->conn_checker >= XCONN_CHECK_FREQ)
	{
	    int	result;
#ifdef USE_POLL
	    struct pollfd filedes;
#else
	    fd_set r_mask;
	    static struct timeval zero_time;
#endif

	    dpy->conn_checker = 0;
#ifdef USE_POLL
	    filedes.fd = dpy->fd;
	    filedes.events = POLLIN;
	    if ((result = poll(&filedes, 1, 0)))
#else
	    FD_ZERO(&r_mask);
	    FD_SET(dpy->fd, &r_mask);
	    if ((result = Select(dpy->fd + 1, &r_mask, NULL, NULL, &zero_time)))
#endif
	    {
		if (result > 0)
		{
		    if (_X11TransBytesReadable(dpy->trans_conn, &pend) < 0)
			_XIOError(dpy);
		    /* we should not get zero, if we do, force a read */
		    if (!pend)
			pend = SIZEOF(xReply);
		}
		else if (result < 0 && !ECHECK(EINTR))
		    _XIOError(dpy);
	    }
	}
#endif /* XCONN_CHECK_FREQ */
	if (!(len = pend)) {
	    /* _XFlush can enqueue events */
#ifdef XTHREADS
	    if (cvl)
#endif
	    {
		UnlockNextEventReader(dpy);
	    }
	    return(dpy->qlen);
	}
      /* Force a read if there is not enough data.  Otherwise,
       * a select() loop at a higher-level will spin undesirably,
       * and we've seen at least one OS that appears to not update
       * the result from FIONREAD once it has returned nonzero.
       */
#ifdef XTHREADS
	if (dpy->lock && dpy->lock->reply_awaiters) {
	    read_buf = (char *)dpy->lock->reply_awaiters->buf;
	    len = SIZEOF(xReply);
	} else
#endif /* XTHREADS*/
	{
	    read_buf = buf.buf;
	    
	    if (len < SIZEOF(xReply)
#ifdef XTHREADS
		|| dpy->async_handlers
#endif
		)
		len = SIZEOF(xReply);
	    else if (len > BUFSIZE)
		len = BUFSIZE;
	    len = (len / SIZEOF(xReply)) * SIZEOF(xReply);
	}
#ifdef XCONN_CHECK_FREQ
	dpy->conn_checker = 0;
#endif

	(void) _XRead (dpy, read_buf, (long) len);
	
#ifdef XTHREADS
	/* what did we actually read: reply or event? */
	if (dpy->lock && dpy->lock->reply_awaiters) {
	    if (((xReply *)read_buf)->generic.type == X_Reply ||
		((xReply *)read_buf)->generic.type == X_Error)
	    {
		dpy->lock->reply_was_read = True;
		dpy->lock->reply_first = True;
		if (read_buf != (char *)dpy->lock->reply_awaiters->buf)
		    memcpy(dpy->lock->reply_awaiters->buf, read_buf,
			   len);
		if (cvl) {
		    UnlockNextEventReader(dpy);
		}
		return(dpy->qlen); /* we read, so we can return */
	    } else if (read_buf != buf.buf)
		memcpy(buf.buf, read_buf, len);
	}
#endif /* XTHREADS*/

	STARTITERATE(rep,xReply,buf.buf,len > 0) {
	    if (rep->generic.type == X_Reply) {
                int tmp = len;
		RESETITERPTR(rep,xReply,
			     _XAsyncReply (dpy, rep,
					   ITERPTR(rep), &tmp, True));
                len = tmp;
		pend = len;
	    } else {
		if (rep->generic.type == X_Error)
		    _XError (dpy, (xError *)rep);
		else   /* must be an event packet */
		    _XEnq (dpy, (xEvent *)rep);
		INCITERPTR(rep,xReply);
		len -= SIZEOF(xReply);
	    }
	} ENDITERATE

#ifdef XTHREADS
	if (cvl)
#endif
	{
	    UnlockNextEventReader(dpy);
	}
	return(dpy->qlen);
}

/* _XReadEvents - Flush the output queue,
 * then read as many events as possible (but at least 1) and enqueue them
 */
void _XReadEvents(
	register Display *dpy)
{
	_XAlignedBuffer buf;
	BytesReadable_t pend;
	int len;
	register xReply *rep;
	Bool not_yet_flushed = True;
	char *read_buf;
	int i;
	int entry_event_serial_num = dpy->next_event_serial_num;
#ifdef XTHREADS
	struct _XCVList *cvl = NULL;
	xthread_t self;

#ifdef XTHREADS_DEBUG
	printf("_XReadEvents called in thread %x\n",
	       XThread_Self());
#endif
	/* create our condition variable and append to list,
	 * unless we were called from within XProcessInternalConnection
	 * or XLockDisplay
	 */
	xthread_clear_id(self);
	if (dpy->lock && (xthread_have_id (dpy->lock->conni_thread)
			  || xthread_have_id (dpy->lock->locking_thread)))
	    /* some thread is in XProcessInternalConnection or XLockDisplay
	       so we have to see if we are it */
	    self = XThread_Self();
	if (!xthread_have_id(self)
	    || (!xthread_equal(self, dpy->lock->conni_thread)
		&& !xthread_equal(self, dpy->lock->locking_thread)))
	    cvl = QueueEventReaderLock(dpy);
#endif /* XTHREADS */

	do {
#ifdef XTHREADS
	    /* if it is not our turn to read an event off the wire,
	       wait til we're at head of list */
	    if (dpy->lock && cvl &&
		(dpy->lock->event_awaiters != cvl ||
		 dpy->lock->reply_first)) {
		ConditionWait(dpy, cvl->cv);
		continue;
	    }
#endif /* XTHREADS */
	    /* find out how much data can be read */
	    if (_X11TransBytesReadable(dpy->trans_conn, &pend) < 0)
	    	_XIOError(dpy);
	    len = pend;

	    /* must read at least one xEvent; if none is pending, then
	       we'll just flush and block waiting for it */
	    if (len < SIZEOF(xEvent)
#ifdef XTHREADS
		|| dpy->async_handlers
#endif
		) {
	    	len = SIZEOF(xEvent);
		/* don't flush until the first time we would block */
		if (not_yet_flushed) {
		    _XFlush (dpy);
		    if (_XNewerQueuedEvent(dpy, entry_event_serial_num)) {
			/* _XReply has read an event for us */
			goto got_event;
		    }
		    not_yet_flushed = False;
		}
	    }

#ifdef XTHREADS
	    /* If someone is waiting for a reply, gamble that
	       the reply will be the next thing on the wire
	       and read it into their buffer. */
	    if (dpy->lock && dpy->lock->reply_awaiters) {
		read_buf = (char *)dpy->lock->reply_awaiters->buf;
		len = SIZEOF(xReply);
	    } else
#endif /* XTHREADS*/
	    {
		read_buf = buf.buf;

		/* but we won't read more than the max buffer size */
		if (len > BUFSIZE)
		    len = BUFSIZE;

		/* round down to an integral number of XReps */
		len = (len / SIZEOF(xEvent)) * SIZEOF(xEvent);
	    }

#ifdef XTHREADS
	    if (xthread_have_id(self))
		/* save value we may have to stick in conni_thread */
		dpy->lock->reading_thread = self;
#endif /* XTHREADS */
	    dpy->flags |= XlibDisplayReadEvents;
	    i = _XRead (dpy, read_buf, (long) len);
	    dpy->flags &= ~XlibDisplayReadEvents;
	    if (i == -2) {
		/* special flag from _XRead to say that internal connection has
		   done XPutBackEvent.  Which we can use so we're done. */
	      got_event:
#ifdef XTHREADS
		if (dpy->lock && dpy->lock->lock_wait) {
		    if (dpy->lock->event_awaiters != cvl)
			/* since it is not us, must be user lock thread */
			ConditionSignal(dpy,
					dpy->lock->event_awaiters->cv);
		    (*dpy->lock->lock_wait)(dpy);
		    continue;
		}
#endif
		break;
	    }
#ifdef XTHREADS
	    if (xthread_have_id(self))
		xthread_clear_id(dpy->lock->reading_thread);

	    /* what did we actually read: reply or event? */
	    if (dpy->lock && dpy->lock->reply_awaiters) {
		if (((xReply *)read_buf)->generic.type == X_Reply ||
		    ((xReply *)read_buf)->generic.type == X_Error)
		{
		    dpy->lock->reply_was_read = True;
		    dpy->lock->reply_first = True;
		    if (read_buf != (char *)dpy->lock->reply_awaiters->buf)
			memcpy(dpy->lock->reply_awaiters->buf,
			       read_buf, len);
		    ConditionSignal(dpy, dpy->lock->reply_awaiters->cv);
		    continue;
		} else if (read_buf != buf.buf)
		    memcpy(buf.buf, read_buf, len);
	    }
#endif /* XTHREADS */

	    STARTITERATE(rep,xReply,buf.buf,len > 0) {
		if (rep->generic.type == X_Reply) {
		    RESETITERPTR(rep,xReply,
				 _XAsyncReply (dpy, rep,
					       ITERPTR(rep), &len, True));
		    pend = len;                       
		} else {
		    if (rep->generic.type == X_Error)
			_XError (dpy, (xError *) rep);
		    else   /* must be an event packet */
			_XEnq (dpy, (xEvent *)rep);
		    INCITERPTR(rep,xReply);
		    len -= SIZEOF(xReply);
		}
	    } ENDITERATE;
	} while (!_XNewerQueuedEvent(dpy, entry_event_serial_num));

	UnlockNextEventReader(dpy);
}

/* 
 * _XRead - Read bytes from the socket taking into account incomplete
 * reads.  This routine may have to be reworked if int < long.
 */
int _XRead(
	register Display *dpy,
	register char *data,
	register long size)
{
	register long bytes_read;
#ifdef XTHREADS
	int original_size = size;
#endif

	if ((dpy->flags & XlibDisplayIOError) || size == 0)
	    return 0;
	ESET(0);
	while ((bytes_read = _X11TransRead(dpy->trans_conn, data, (int)size))
		!= size) {

	    	if (bytes_read > 0) {
		    size -= bytes_read;
		    data += bytes_read;
		    }
		else if (ETEST()) {
		    if (_XWaitForReadable(dpy) == -2)
			return -2; /* internal connection did XPutBackEvent */
		    ESET(0);
		}
#ifdef SUNSYSV
		else if (ECHECK(0)) {
		    if (_XWaitForReadable(dpy) == -2)
			return -2; /* internal connection did XPutBackEvent */
		}
#endif
		else if (bytes_read == 0) {
		    /* Read failed because of end of file! */
		    ESET(EPIPE);
		    _XIOError(dpy);
		    }

		else  /* bytes_read is less than 0; presumably -1 */ {
		    /* If it's a system call interrupt, it's not an error. */
		    if (!ECHECK(EINTR))
		    	_XIOError(dpy);
		    }
	    	 }
#ifdef XTHREADS
       if (dpy->lock && dpy->lock->reply_bytes_left > 0)
       {
           dpy->lock->reply_bytes_left -= original_size;
           if (dpy->lock->reply_bytes_left == 0) {
	       dpy->flags &= ~XlibDisplayReply;
               UnlockNextReplyReader(dpy);
	   }
       }
#endif /* XTHREADS*/
	return 0;
}

#ifdef LONG64
void _XRead32(
    Display *dpy,
    register long *data,
    long len)
{
    register int *buf;
    register long i;

    if (len) {
	(void) _XRead(dpy, (char *)data, len);
	i = len >> 2;
	buf = (int *)data + i;
	data += i;
	while (--i >= 0)
	    *--data = *--buf;
    }
}
#endif /* LONG64 */

#ifdef WORD64

/*
 * XXX This is a *really* stupid way of doing this....
 * PACKBUFFERSIZE must be a multiple of 4.
 */

#define PACKBUFFERSIZE 4096


/*
 * _XRead32 - Read bytes from the socket unpacking each 32 bits
 *            into a long (64 bits on a CRAY computer).
 * 
 */
static void _doXRead32(
        register Display *dpy,
        register long *data
        register long size,
	register char *packbuffer)
{
 long *lpack,*lp;
 long mask32 = 0x00000000ffffffff;
 long maskw, nwords, i, bits;

        _XReadPad (dpy, packbuffer, size);

        lp = data;
        lpack = (long *) packbuffer;
        nwords = size >> 2;
        bits = 32;

        for(i=0;i<nwords;i++){
            maskw = mask32 << bits;
           *lp++ = ( *lpack & maskw ) >> bits;
            bits = bits ^32;
            if(bits){
               lpack++;
            }
        }
}

void _XRead32(
    Display *dpy,
    long *data,
    long len)
{
    char packbuffer[PACKBUFFERSIZE];
    unsigned nunits = PACKBUFFERSIZE >> 2;

    for (; len > PACKBUFFERSIZE; len -= PACKBUFFERSIZE, data += nunits) {
	_doXRead32 (dpy, data, PACKBUFFERSIZE, packbuffer);
    }
    if (len) _doXRead32 (dpy, data, len, packbuffer);
}



/*
 * _XRead16 - Read bytes from the socket unpacking each 16 bits
 *            into a long (64 bits on a CRAY computer).
 *
 */
static _doXRead16(
        register Display *dpy,
        register short *data,
        register long size,
	char *packbuffer)
{
	long *lpack,*lp;
	long mask16 = 0x000000000000ffff;
	long maskw, nwords, i, bits;

        (void) _XRead(dpy,packbuffer,size);	/* don't do a padded read... */

        lp = (long *) data;
        lpack = (long *) packbuffer;
        nwords = size >> 1;  /* number of 16 bit words to be unpacked */
        bits = 48;
        for(i=0;i<nwords;i++){
            maskw = mask16 << bits;
           *lp++ = ( *lpack & maskw ) >> bits;
            bits -= 16;
            if(bits < 0){
               lpack++;
               bits = 48;
            }
        }
}

void _XRead16(
    Display *dpy,
    short *data,
    long len)
{
    char packbuffer[PACKBUFFERSIZE];
    unsigned nunits = PACKBUFFERSIZE >> 1;

    for (; len > PACKBUFFERSIZE; len -= PACKBUFFERSIZE, data += nunits) {
	_doXRead16 (dpy, data, PACKBUFFERSIZE, packbuffer);
    }
    if (len) _doXRead16 (dpy, data, len, packbuffer);
}

void _XRead16Pad(
    Display *dpy,
    short *data,
    long size)
{
    int slop = (size & 3);
    short slopbuf[3];

    _XRead16 (dpy, data, size);
    if (slop > 0) {
	_XRead16 (dpy, slopbuf, 4 - slop);
    }
}
#endif /* WORD64 */


/*
 * _XReadPad - Read bytes from the socket taking into account incomplete
 * reads.  If the number of bytes is not 0 mod 4, read additional pad
 * bytes. This routine may have to be reworked if int < long.
 */
void _XReadPad(
    	register Display *dpy,
	register char *data,
	register long size)
{
    	register long bytes_read;
	struct iovec iov[2];
	char pad[3];
#ifdef XTHREADS
        int original_size;
#endif

	if ((dpy->flags & XlibDisplayIOError) || size == 0) return;
	iov[0].iov_len = (int)size;
	iov[0].iov_base = data;
	/* 
	 * The following hack is used to provide 32 bit long-word
	 * aligned padding.  The [1] vector is of length 0, 1, 2, or 3,
	 * whatever is needed.
	 */

	iov[1].iov_len = -size & 3;
	iov[1].iov_base = pad;
	size += iov[1].iov_len;
#ifdef XTHREADS
	original_size = size;
#endif
	ESET(0);
	while ((bytes_read = _X11TransReadv (dpy->trans_conn, iov, 2)) != size) {

	    if (bytes_read > 0) {
		size -= bytes_read;
		if (iov[0].iov_len < bytes_read) {
		    int pad_bytes_read = bytes_read - iov[0].iov_len;
		    iov[1].iov_len -= pad_bytes_read;
		    iov[1].iov_base =
			(char *)iov[1].iov_base + pad_bytes_read;
		    iov[0].iov_len = 0;
		    }
	    	else {
		    iov[0].iov_len -= bytes_read;
	    	    iov[0].iov_base = (char *)iov[0].iov_base + bytes_read;
	    	}
	    }
	    else if (ETEST()) {
		_XWaitForReadable(dpy);
		ESET(0);
	    }
#ifdef SUNSYSV
	    else if (ECHECK(0)) {
		_XWaitForReadable(dpy);
	    }
#endif
	    else if (bytes_read == 0) {
		/* Read failed because of end of file! */
		ESET(EPIPE);
		_XIOError(dpy);
		}
	    
	    else  /* bytes_read is less than 0; presumably -1 */ {
		/* If it's a system call interrupt, it's not an error. */
		if (!ECHECK(EINTR))
		    _XIOError(dpy);
		}
	    }
#ifdef XTHREADS
       if (dpy->lock && dpy->lock->reply_bytes_left > 0)
       {
           dpy->lock->reply_bytes_left -= original_size;
           if (dpy->lock->reply_bytes_left == 0) {
	       dpy->flags &= ~XlibDisplayReply;
               UnlockNextReplyReader(dpy);
	   }
       }
#endif /* XTHREADS*/
}

/*
 * _XSend - Flush the buffer and send the client data. 32 bit word aligned
 * transmission is used, if size is not 0 mod 4, extra bytes are transmitted.
 * This routine may have to be reworked if int < long;
 */
void
_XSend (
	register Display *dpy,
	_Xconst char *data,
	register long size)
{
	struct iovec iov[3];
	static char const pad[3] = {0, 0, 0};
           /* XText8 and XText16 require that the padding bytes be zero! */

	long skip, dbufsize, padsize, total, todo;
	_XExtension *ext;

	if (!size || (dpy->flags & XlibDisplayIOError)) return;
	dbufsize = dpy->bufptr - dpy->buffer;
#ifdef XTHREADS
	dpy->flags |= XlibDisplayWriting;
	/* make sure no one else can put in data */
	dpy->bufptr = dpy->bufmax;
#endif
	padsize = -size & 3;
	for (ext = dpy->flushes; ext; ext = ext->next_flush) {
	    (*ext->before_flush)(dpy, &ext->codes, dpy->buffer, dbufsize);
	    (*ext->before_flush)(dpy, &ext->codes, (char *)data, size);
	    if (padsize)
		(*ext->before_flush)(dpy, &ext->codes, pad, padsize);
	}
	skip = 0;
	todo = total = dbufsize + size + padsize;

	/*
	 * There are 3 pieces that may need to be written out:
	 *
	 *     o  whatever is in the display buffer
	 *     o  the data passed in by the user
	 *     o  any padding needed to 32bit align the whole mess
	 *
	 * This loop looks at all 3 pieces each time through.  It uses skip
	 * to figure out whether or not a given piece is needed.
	 */
	while (total) {
	    long before = skip;		/* amount of whole thing written */
	    long remain = todo;		/* amount to try this time, <= total */
	    int i = 0;
	    long len;

	    /* You could be very general here and have "in" and "out" iovecs
	     * and write a loop without using a macro, but what the heck.  This
	     * translates to:
	     *
	     *     how much of this piece is new?
	     *     if more new then we are trying this time, clamp
	     *     if nothing new
	     *         then bump down amount already written, for next piece
	     *         else put new stuff in iovec, will need all of next piece
	     *
	     * Note that todo had better be at least 1 or else we'll end up
	     * writing 0 iovecs.
	     */
#define InsertIOV(pointer, length) \
	    len = (length) - before; \
	    if (len > remain) \
		len = remain; \
	    if (len <= 0) { \
		before = (-len); \
	    } else { \
		iov[i].iov_len = len; \
		iov[i].iov_base = (pointer) + before; \
		i++; \
		remain -= len; \
		before = 0; \
	    }

	    InsertIOV (dpy->buffer, dbufsize)
	    InsertIOV ((char *)data, size)
	    InsertIOV ((char *)pad, padsize)
    
	    ESET(0);
	    if ((len = _X11TransWritev(dpy->trans_conn, iov, i)) >= 0) {
		skip += len;
		total -= len;
		todo = total;
	    } else if (ETEST()) {
		_XWaitForWritable(dpy
#ifdef XTHREADS
				  , NULL
#endif
				  );
#ifdef SUNSYSV
	    } else if (ECHECK(0)) {
		_XWaitForWritable(dpy
#ifdef XTHREADS
				  , NULL
#endif
				  );
#endif
#ifdef ESZTEST
	    } else if (ESZTEST()) {
		if (todo > 1) 
		  todo >>= 1;
		else {
		    _XWaitForWritable(dpy
#ifdef XTHREADS
				      , NULL
#endif
				      );
		}
#endif
	    } else if (!ECHECK(EINTR)) {
		_XIOError(dpy);
	    }
	}
	dpy->last_req = (char *) & _dummy_request;
	if ((dpy->request - dpy->last_request_read) >= SEQLIMIT &&
	    !(dpy->flags & XlibDisplayPrivSync)) {
	    dpy->savedsynchandler = dpy->synchandler;
	    dpy->synchandler = _XSeqSyncFunction;
	    dpy->flags |= XlibDisplayPrivSync;
	}
	dpy->bufptr = dpy->buffer;
#ifdef XTHREADS
	dpy->flags &= ~XlibDisplayWriting;
#endif
	return;
}

static void
_XGetMiscCode(
    register Display *dpy)
{
    xQueryExtensionReply qrep;
    register xQueryExtensionReq *qreq;
    xXCMiscGetVersionReply vrep;
    register xXCMiscGetVersionReq *vreq;

    if (dpy->xcmisc_opcode)
	return;
    GetReq(QueryExtension, qreq);
    qreq->nbytes = sizeof(XCMiscExtensionName) - 1;
    qreq->length += (qreq->nbytes+(unsigned)3)>>2;
    _XSend(dpy, XCMiscExtensionName, (long)qreq->nbytes);
    if (!_XReply (dpy, (xReply *)&qrep, 0, xTrue))
	dpy->xcmisc_opcode = -1;
    else {
	GetReq(XCMiscGetVersion, vreq);
	vreq->reqType = qrep.major_opcode;
	vreq->miscReqType = X_XCMiscGetVersion;
	vreq->majorVersion = XCMiscMajorVersion;
	vreq->minorVersion = XCMiscMinorVersion;
	if (!_XReply (dpy, (xReply *)&vrep, 0, xTrue))
	    dpy->xcmisc_opcode = -1;
	else
	    dpy->xcmisc_opcode = qrep.major_opcode;
    }
}

static int
_XIDHandler(
    register Display *dpy)
{
    xXCMiscGetXIDRangeReply grep;
    register xXCMiscGetXIDRangeReq *greq;

    LockDisplay(dpy);
    _XGetMiscCode(dpy);
    if (dpy->xcmisc_opcode > 0) {
	GetReq(XCMiscGetXIDRange, greq);
	greq->reqType = dpy->xcmisc_opcode;
	greq->miscReqType = X_XCMiscGetXIDRange;
	if (_XReply (dpy, (xReply *)&grep, 0, xTrue) && grep.count) {
	    dpy->resource_id = ((grep.start_id - dpy->resource_base) >>
				dpy->resource_shift);
	    dpy->resource_max = dpy->resource_id;
	    if (grep.count > 5)
		dpy->resource_max += grep.count - 6;
	    dpy->resource_max <<= dpy->resource_shift;
	}
    }
    if (dpy->flags & XlibDisplayPrivSync) {
	dpy->synchandler = dpy->savedsynchandler;
	dpy->flags &= ~XlibDisplayPrivSync;
    }
    UnlockDisplay(dpy);
    SyncHandle();
    return 0;
}

/*
 * _XAllocID - resource ID allocation routine.
 */
XID _XAllocID(
    register Display *dpy)
{
   XID id;

   id = dpy->resource_id << dpy->resource_shift;
   if (id >= dpy->resource_max) {
       if (!(dpy->flags & XlibDisplayPrivSync)) {
	   dpy->savedsynchandler = dpy->synchandler;
	   dpy->flags |= XlibDisplayPrivSync;
       }
       dpy->synchandler = _XIDHandler;
       dpy->resource_max = dpy->resource_mask + 1;
   }
   if (id <= dpy->resource_mask) {
       dpy->resource_id++;
       return (dpy->resource_base + id);
   }
   if (id != 0x10000000) {
       (void) fprintf(stderr,
		      "Xlib: resource ID allocation space exhausted!\n");
       id = 0x10000000;
       dpy->resource_id = id >> dpy->resource_shift;
   }
   return id;
}

/*
 * _XAllocIDs - multiple resource ID allocation routine.
 */
void _XAllocIDs(
    register Display *dpy,
    XID *ids,
    int count)
{
    XID id;
    int i;
    xXCMiscGetXIDListReply grep;
    register xXCMiscGetXIDListReq *greq;

    id = dpy->resource_id << dpy->resource_shift;
    if (dpy->resource_max <= dpy->resource_mask &&
	id <= dpy->resource_mask &&
	(dpy->resource_max - id) > ((count - 1) << dpy->resource_shift)) {
	id += dpy->resource_base;
	for (i = 0; i < count; i++) {
	    ids[i] = id;
	    id += (1 << dpy->resource_shift);
	    dpy->resource_id++;
	}
	return;
    }
    grep.count = 0;
    _XGetMiscCode(dpy);
    if (dpy->xcmisc_opcode > 0) {
	GetReq(XCMiscGetXIDList, greq);
	greq->reqType = dpy->xcmisc_opcode;
	greq->miscReqType = X_XCMiscGetXIDList;
	greq->count = count;
	if (_XReply(dpy, (xReply *)&grep, 0, xFalse) && grep.count) {
	    _XRead32(dpy, (long *) ids, 4L * (long) (grep.count));
	    for (i = 0; i < grep.count; i++) {
		id = (ids[i] - dpy->resource_base) >> dpy->resource_shift;
		if (id >= dpy->resource_id)
		    dpy->resource_id = id;
	    }
	    if (id >= dpy->resource_max) {
		if (!(dpy->flags & XlibDisplayPrivSync)) {
		    dpy->savedsynchandler = dpy->synchandler;
		    dpy->flags |= XlibDisplayPrivSync;
		}
		dpy->synchandler = _XIDHandler;
		dpy->resource_max = dpy->resource_mask + 1;
	    }
	}
    }
    for (i = grep.count; i < count; i++)
	ids[i] = XAllocID(dpy);
}

/*
 * The hard part about this is that we only get 16 bits from a reply.
 * We have three values that will march along, with the following invariant:
 *	dpy->last_request_read <= rep->sequenceNumber <= dpy->request
 * We have to keep
 *	dpy->request - dpy->last_request_read < 2^16
 * or else we won't know for sure what value to use in events.  We do this
 * by forcing syncs when we get close.
 */

unsigned long
_XSetLastRequestRead(
    register Display *dpy,
    register xGenericReply *rep)
{
    register unsigned long	newseq, lastseq;

    lastseq = dpy->last_request_read;
    /*
     * KeymapNotify has no sequence number, but is always guaranteed
     * to immediately follow another event, except when generated via
     * SendEvent (hmmm).
     */
    if ((rep->type & 0x7f) == KeymapNotify)
	return(lastseq);

    newseq = (lastseq & ~((unsigned long)0xffff)) | rep->sequenceNumber;

    if (newseq < lastseq) {
	newseq += 0x10000;
	if (newseq > dpy->request) {
	    (void) fprintf (stderr, 
	    "Xlib: sequence lost (0x%lx > 0x%lx) in reply type 0x%x!\n",
			    newseq, dpy->request, 
			    (unsigned int) rep->type);
	    newseq -= 0x10000;
	}
    }

    dpy->last_request_read = newseq;
    return(newseq);
}

/*
 * _XReply - Wait for a reply packet and copy its contents into the
 * specified rep.  Meanwhile we must handle error and event packets that
 * we may encounter.
 */
Status
_XReply (
    register Display *dpy,
    register xReply *rep,
    int extra,		/* number of 32-bit words expected after the reply */
    Bool discard)	/* should I discard data following "extra" words? */
{
    /* Pull out the serial number now, so that (currently illegal) requests
     * generated by an error handler don't confuse us.
     */
    unsigned long cur_request = dpy->request;
#ifdef XTHREADS
    struct _XCVList *cvl;
#endif

    if (dpy->flags & XlibDisplayIOError)
	return 0;

#ifdef XTHREADS
    /* create our condition variable and append to list */
    cvl = QueueReplyReaderLock(dpy);
    if (cvl) {
	cvl->buf = rep;
	if (dpy->lock->reply_awaiters == cvl && !dpy->lock->event_awaiters)
	    dpy->lock->reply_first = True;
    }

#ifdef XTHREADS_DEBUG
    printf("_XReply called in thread %x, adding %x to cvl\n",
	   XThread_Self(), cvl);
#endif

    _XFlushInt(dpy, cvl ? cvl->cv : NULL);
    /* if it is not our turn to read a reply off the wire,
     * wait til we're at head of list.  if there is an event waiter,
     * and our reply hasn't been read, they'll be in select and will
     * hand control back to us next.
     */
    if(dpy->lock &&
       (dpy->lock->reply_awaiters != cvl || !dpy->lock->reply_first)) {
	ConditionWait(dpy, cvl->cv);
    }
    dpy->flags |= XlibDisplayReply;
#else /* XTHREADS else */
    _XFlush(dpy);
#endif

    for (;;) {
#ifdef XTHREADS
	/* Did another thread's _XReadEvents get our reply by accident? */
	if (!dpy->lock || !dpy->lock->reply_was_read)
#endif
	    (void) _XRead(dpy, (char *)rep, (long)SIZEOF(xReply));
#ifdef XTHREADS
	if (dpy->lock)
	    dpy->lock->reply_was_read = False;
#endif

	switch ((int)rep->generic.type) {

	    case X_Reply:
	        /* Reply received.  Fast update for synchronous replies,
		 * but deal with multiple outstanding replies.
		 */
	        if (rep->generic.sequenceNumber == (cur_request & 0xffff))
		    dpy->last_request_read = cur_request;
		else {
		    int pend = SIZEOF(xReply);
		    if (_XAsyncReply(dpy, rep, (char *)rep, &pend, False)
			!= (char *)rep)
			continue;
		}
		if (extra <= rep->generic.length) {
		    if (extra > 0)
			/* 
			 * Read the extra data into storage immediately
			 * following the GenericReply structure. 
			 */
			(void) _XRead (dpy, (char *) (NEXTPTR(rep,xReply)),
				((long)extra) << 2);
		    if (discard) {
			if (extra < rep->generic.length)
			    _XEatData(dpy, (rep->generic.length - extra) << 2);
		    }
#ifdef XTHREADS
		    if (dpy->lock) {
			if (discard) {
			    dpy->lock->reply_bytes_left = 0;
			} else {
			    dpy->lock->reply_bytes_left =
				(rep->generic.length - extra) << 2;
			}
			if (dpy->lock->reply_bytes_left == 0) {
			    dpy->flags &= ~XlibDisplayReply;
			    UnlockNextReplyReader(dpy);
			}
		    } else
			dpy->flags &= ~XlibDisplayReply;
#endif
		    return 1;
		}
		/* 
		 *if we get here, then extra > rep->generic.length--meaning we
		 * read a reply that's shorter than we expected.  This is an 
		 * error,  but we still need to figure out how to handle it...
		 */
		(void) _XRead (dpy, (char *) (NEXTPTR(rep,xReply)),
			((long) rep->generic.length) << 2);
		dpy->flags &= ~XlibDisplayReply;
		UnlockNextReplyReader(dpy);
		_XIOError (dpy);
		return (0);

    	    case X_Error:
	    	{
	        register _XExtension *ext;
		register Bool ret = False;
		int ret_code;
		xError *err = (xError *) rep;
		unsigned long serial;

		dpy->flags &= ~XlibDisplayReply;
		serial = _XSetLastRequestRead(dpy, (xGenericReply *)rep);
		if (serial == cur_request)
			/* do not die on "no such font", "can't allocate",
			   "can't grab" failures */
			switch ((int)err->errorCode) {
			case BadName:
			    switch (err->majorCode) {
				case X_LookupColor:
				case X_AllocNamedColor:
				    UnlockNextReplyReader(dpy);
				    return(0);
			    }
			    break;
			case BadFont:
			    if (err->majorCode == X_QueryFont) {
				UnlockNextReplyReader(dpy);
				return (0);
			    }
			    break;
			case BadAlloc:
			case BadAccess:
			    UnlockNextReplyReader(dpy);
			    return (0);
			}
		/* 
		 * we better see if there is an extension who may
		 * want to suppress the error.
		 */
		for (ext = dpy->ext_procs; !ret && ext; ext = ext->next) {
		    if (ext->error) 
		       ret = (*ext->error)(dpy, err, &ext->codes, &ret_code);
		}
		if (!ret) {
		    _XError(dpy, err);
		    ret_code = 0;
		}
		if (serial == cur_request) {
		    UnlockNextReplyReader(dpy);
		    return(ret_code);
		}

		} /* case X_Error */
		break;
	    default:
		_XEnq(dpy, (xEvent *) rep);
#ifdef XTHREADS
		if (dpy->lock && dpy->lock->event_awaiters)
		    ConditionSignal(dpy, dpy->lock->event_awaiters->cv);
#endif
		break;
	    }
	}
}   

static char *
_XAsyncReply(
    Display *dpy,
    register xReply *rep,
    char *buf,
    register int *lenp,
    Bool discard)
{
    register _XAsyncHandler *async, *next;
    register int len;
    register Bool consumed = False;
    char *nbuf;

    (void) _XSetLastRequestRead(dpy, &rep->generic);
    len = SIZEOF(xReply) + (rep->generic.length << 2);
    if (len < SIZEOF(xReply)) {
	_XIOError (dpy);
	buf += *lenp;
	*lenp = 0;
	return buf;
    }
    
    for (async = dpy->async_handlers; async; async = next) {
	next = async->next;
	if ((consumed = (*async->handler)(dpy, rep, buf, *lenp, async->data)))
	    break;
    }
    if (!consumed) {
	if (!discard)
	    return buf;
	(void) fprintf(stderr, 
		       "Xlib: unexpected async reply (sequence 0x%lx)!\n",
		       dpy->last_request_read);
#ifdef XTHREADS
#ifdef XTHREADS_DEBUG
	printf("thread %x, unexpected async reply\n", XThread_Self());
#endif
#endif
	if (len > *lenp)
	    _XEatData(dpy, len - *lenp);
    }
    if (len < SIZEOF(xReply))
    {
	_XIOError (dpy);
	buf += *lenp;
	*lenp = 0;
	return buf;
    }
    if (len >= *lenp) {
	buf += *lenp;
	*lenp = 0;
	return buf;
    }
    *lenp -= len;
    buf += len;
    len = *lenp;
    nbuf = buf;
    while (len > SIZEOF(xReply)) {
	if (*buf == X_Reply)
	    return nbuf;
	buf += SIZEOF(xReply);
	len -= SIZEOF(xReply);
    }
    if (len > 0 && len < SIZEOF(xReply)) {
	buf = nbuf;
	len = SIZEOF(xReply) - len;
	nbuf -= len;
	memmove(nbuf, buf, *lenp);
	(void) _XRead(dpy, nbuf + *lenp, (long)len);
	*lenp += len;
    }
    return nbuf;
}

/*
 * Support for internal connections, such as an IM might use.
 * By Stephen Gildea, X Consortium, September 1993
 */

/* _XRegisterInternalConnection
 * Each IM (or Xlib extension) that opens a file descriptor that Xlib should
 * include in its select/poll mask must call this function to register the
 * fd with Xlib.  Any XConnectionWatchProc registered by XAddConnectionWatch
 * will also be called.
 *
 * Whenever Xlib detects input available on fd, it will call callback
 * with call_data to process it.  If non-Xlib code calls select/poll
 * and detects input available, it must call XProcessInternalConnection,
 * which will call the associated callback.
 *
 * Non-Xlib code can learn about these additional fds by calling
 * XInternalConnectionNumbers or, more typically, by registering
 * a XConnectionWatchProc with XAddConnectionWatch
 * to be called when fds are registered or unregistered.
 *
 * Returns True if registration succeeded, False if not, typically
 * because could not allocate memory.
 * Assumes Display locked when called.
 */
Status
_XRegisterInternalConnection(
    Display* dpy,
    int fd,
    _XInternalConnectionProc callback,
    XPointer call_data
)
{
    struct _XConnectionInfo *new_conni, **iptr;
    struct _XConnWatchInfo *watchers;
    XPointer *wd;

    new_conni = (struct _XConnectionInfo*)Xmalloc(sizeof(struct _XConnectionInfo));
    if (!new_conni)
	return 0;
    new_conni->watch_data = (XPointer *)Xmalloc(dpy->watcher_count * sizeof(XPointer));
    if (!new_conni->watch_data) {
	Xfree(new_conni);
	return 0;
    }
    new_conni->fd = fd;
    new_conni->read_callback = callback;
    new_conni->call_data = call_data;
    new_conni->next = NULL;
    /* link new structure onto end of list */
    for (iptr = &dpy->im_fd_info; *iptr; iptr = &(*iptr)->next)
	;
    *iptr = new_conni;
    dpy->im_fd_length++;
    _XPollfdCacheAdd(dpy, fd);

    for (watchers=dpy->conn_watchers, wd=new_conni->watch_data;
	 watchers;
	 watchers=watchers->next, wd++) {
	*wd = NULL;		/* for cleanliness */
	(*watchers->fn) (dpy, watchers->client_data, fd, True, wd);
    }

    return 1;
}

/* _XUnregisterInternalConnection
 * Each IM (or Xlib extension) that closes a file descriptor previously
 * registered with _XRegisterInternalConnection must call this function.
 * Any XConnectionWatchProc registered by XAddConnectionWatch
 * will also be called.
 *
 * Assumes Display locked when called.
 */
void
_XUnregisterInternalConnection(
    Display* dpy,
    int fd
)
{
    struct _XConnectionInfo *info_list, **prev;
    struct _XConnWatchInfo *watch;
    XPointer *wd;

    for (prev = &dpy->im_fd_info; (info_list = *prev);
	 prev = &info_list->next) {
	if (info_list->fd == fd) {
	    *prev = info_list->next;
	    dpy->im_fd_length--;
	    for (watch=dpy->conn_watchers, wd=info_list->watch_data;
		 watch;
		 watch=watch->next, wd++) {
		(*watch->fn) (dpy, watch->client_data, fd, False, wd);
	    }
	    if (info_list->watch_data)
		Xfree (info_list->watch_data);
	    Xfree (info_list);
	    break;
	}
    }
    _XPollfdCacheDel(dpy, fd);
}

/* XInternalConnectionNumbers
 * Returns an array of fds and an array of corresponding call data.
 * Typically a XConnectionWatchProc registered with XAddConnectionWatch
 * will be used instead of this function to discover
 * additional fds to include in the select/poll mask.
 *
 * The list is allocated with Xmalloc and should be freed by the caller
 * with Xfree;
 */
Status
XInternalConnectionNumbers(
    Display *dpy,
    int **fd_return,
    int *count_return
)
{
    int count;
    struct _XConnectionInfo *info_list;
    int *fd_list;

    LockDisplay(dpy);
    count = 0;
    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next)
	count++;
    fd_list = (int*) Xmalloc (count * sizeof(int));
    if (!fd_list) {
	UnlockDisplay(dpy);
	return 0;
    }
    count = 0;
    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next) {
	fd_list[count] = info_list->fd;
	count++;
    }
    UnlockDisplay(dpy);

    *fd_return = fd_list;
    *count_return = count;
    return 1;
}

static void _XProcessInternalConnection(
    Display *dpy,
    struct _XConnectionInfo *conn_info)
{
    dpy->flags |= XlibDisplayProcConni;
#ifdef XTHREADS
    if (dpy->lock) {
	/* check cache to avoid call to thread_self */
	if (xthread_have_id(dpy->lock->reading_thread))
	    dpy->lock->conni_thread = dpy->lock->reading_thread;
	else
	    dpy->lock->conni_thread = XThread_Self();
    }
#endif /* XTHREADS */
    UnlockDisplay(dpy);
    (*conn_info->read_callback) (dpy, conn_info->fd, conn_info->call_data);
    LockDisplay(dpy);
#ifdef XTHREADS
    if (dpy->lock)
	xthread_clear_id(dpy->lock->conni_thread);
#endif /* XTHREADS */
    dpy->flags &= ~XlibDisplayProcConni;
}

/* XProcessInternalConnection
 * Call the _XInternalConnectionProc registered by _XRegisterInternalConnection
 * for this fd.
 * The Display is NOT locked during the call.
 */
void
XProcessInternalConnection(
    Display* dpy,
    int fd
)
{
    struct _XConnectionInfo *info_list;

    LockDisplay(dpy);
    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next) {
	if (info_list->fd == fd) {
	    _XProcessInternalConnection(dpy, info_list);
	    break;
	}
    }
    UnlockDisplay(dpy);
}

/* XAddConnectionWatch
 * Register a callback to be called whenever _XRegisterInternalConnection
 * or _XUnregisterInternalConnection is called.
 * Callbacks are called with the Display locked.
 * If any connections are already registered, the callback is immediately
 * called for each of them.
 */
Status
XAddConnectionWatch(
    Display* dpy,
    XConnectionWatchProc callback,
    XPointer client_data
)
{
    struct _XConnWatchInfo *new_watcher, **wptr;
    struct _XConnectionInfo *info_list;
    XPointer *wd_array;

    LockDisplay(dpy);

    /* allocate new watch data */
    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next) {
	wd_array = (XPointer *)Xrealloc((char *)info_list->watch_data,
					(dpy->watcher_count + 1) *
					sizeof(XPointer));
	if (!wd_array) {
	    UnlockDisplay(dpy);
	    return 0;
	}
	wd_array[dpy->watcher_count] = NULL;	/* for cleanliness */
    }

    new_watcher = (struct _XConnWatchInfo*)Xmalloc(sizeof(struct _XConnWatchInfo));
    if (!new_watcher) {
	UnlockDisplay(dpy);
	return 0;
    }
    new_watcher->fn = callback;
    new_watcher->client_data = client_data;
    new_watcher->next = NULL;

    /* link new structure onto end of list */
    for (wptr = &dpy->conn_watchers; *wptr; wptr = &(*wptr)->next)
	;
    *wptr = new_watcher;
    dpy->watcher_count++;

    /* call new watcher on all currently registered fds */
    for (info_list=dpy->im_fd_info; info_list; info_list=info_list->next) {
	(*callback) (dpy, client_data, info_list->fd, True,
		     info_list->watch_data + dpy->watcher_count - 1);
    }

    UnlockDisplay(dpy);
    return 1;
}

/* XRemoveConnectionWatch
 * Unregister a callback registered by XAddConnectionWatch.
 * Both callback and client_data must match what was passed to
 * XAddConnectionWatch.
 */ 
void
XRemoveConnectionWatch(
    Display* dpy,
    XConnectionWatchProc callback,
    XPointer client_data
)
{
    struct _XConnWatchInfo *watch;
    struct _XConnWatchInfo *previous = NULL;
    struct _XConnectionInfo *conni;
    int counter = 0;

    LockDisplay(dpy);
    for (watch=dpy->conn_watchers; watch; watch=watch->next) {
	if (watch->fn == callback  &&  watch->client_data == client_data) {
	    if (previous)
		previous->next = watch->next;
	    else
		dpy->conn_watchers = watch->next;
	    Xfree (watch);
	    dpy->watcher_count--;
	    /* remove our watch_data for each connection */
	    for (conni=dpy->im_fd_info; conni; conni=conni->next) {
		/* don't bother realloc'ing; these arrays are small anyway */
		/* overlapping */
		memmove(conni->watch_data+counter,
			conni->watch_data+counter+1,
			dpy->watcher_count - counter);
	    }
	    break;
	}
	previous = watch;
	counter++;
    }
    UnlockDisplay(dpy);
}

/* end of internal connections support */


/* Read and discard "n" 8-bit bytes of data */

void _XEatData(
    Display *dpy,
    register unsigned long n)
{
#define SCRATCHSIZE 2048
    char buf[SCRATCHSIZE];

    while (n > 0) {
	register long bytes_read = (n > SCRATCHSIZE) ? SCRATCHSIZE : n;
	(void) _XRead (dpy, buf, bytes_read);
	n -= bytes_read;
    }
#undef SCRATCHSIZE
}


/*
 * _XEnq - Place event packets on the display's queue.
 * note that no squishing of move events in V11, since there
 * is pointer motion hints....
 */
void _XEnq(
	register Display *dpy,
	register xEvent *event)
{
	register _XQEvent *qelt;

	if ((qelt = dpy->qfree)) {
		/* If dpy->qfree is non-NULL do this, else malloc a new one. */
		dpy->qfree = qelt->next;
	}
	else if ((qelt = 
	    (_XQEvent *) Xmalloc((unsigned)sizeof(_XQEvent))) == NULL) {
		/* Malloc call failed! */
		ESET(ENOMEM);
		_XIOError(dpy);
	}
	qelt->next = NULL;
	/* go call through display to find proper event reformatter */
	if ((*dpy->event_vec[event->u.u.type & 0177])(dpy, &qelt->event, event)) {
	    qelt->qserial_num = dpy->next_event_serial_num++;
	    if (dpy->tail)	dpy->tail->next = qelt;
	    else 		dpy->head = qelt;
    
	    dpy->tail = qelt;
	    dpy->qlen++;
	} else {
	    /* ignored, or stashed away for many-to-one compression */
	    qelt->next = dpy->qfree;
	    dpy->qfree = qelt;
	}
}

/*
 * _XDeq - Remove event packet from the display's queue.
 */
void _XDeq(
    register Display *dpy,
    register _XQEvent *prev,	/* element before qelt */
    register _XQEvent *qelt)	/* element to be unlinked */
{
    if (prev) {
	if ((prev->next = qelt->next) == NULL)
	    dpy->tail = prev;
    } else {
	/* no prev, so removing first elt */
	if ((dpy->head = qelt->next) == NULL)
	    dpy->tail = NULL;
    }
    qelt->qserial_num = 0;
    qelt->next = dpy->qfree;
    dpy->qfree = qelt;
    dpy->qlen--;
}

/*
 * EventToWire in separate file in that often not needed.
 */

/*ARGSUSED*/
Bool
_XUnknownWireEvent(
    register Display *dpy,	/* pointer to display structure */
    register XEvent *re,	/* pointer to where event should be reformatted */
    register xEvent *event)	/* wire protocol event */
{
#ifdef notdef
	(void) fprintf(stderr, 
	    "Xlib: unhandled wire event! event number = %d, display = %x\n.",
			event->u.u.type, dpy);
#endif
	return(False);
}

/*ARGSUSED*/
Status
_XUnknownNativeEvent(
    register Display *dpy,	/* pointer to display structure */
    register XEvent *re,	/* pointer to where event should be reformatted */
    register xEvent *event)	/* wire protocol event */
{
#ifdef notdef
	(void) fprintf(stderr, 
 	   "Xlib: unhandled native event! event number = %d, display = %x\n.",
			re->type, dpy);
#endif
	return(0);
}
/*
 * reformat a wire event into an XEvent structure of the right type.
 */
Bool
_XWireToEvent(
    register Display *dpy,	/* pointer to display structure */
    register XEvent *re,	/* pointer to where event should be reformatted */
    register xEvent *event)	/* wire protocol event */
{

	re->type = event->u.u.type & 0x7f;
	((XAnyEvent *)re)->serial = _XSetLastRequestRead(dpy,
					(xGenericReply *)event);
	((XAnyEvent *)re)->send_event = ((event->u.u.type & 0x80) != 0);
	((XAnyEvent *)re)->display = dpy;
	
	/* Ignore the leading bit of the event type since it is set when a
		client sends an event rather than the server. */

	switch (event-> u.u.type & 0177) {
	      case KeyPress:
	      case KeyRelease:
	        {
			register XKeyEvent *ev = (XKeyEvent*) re;
			ev->root 	= event->u.keyButtonPointer.root;
			ev->window 	= event->u.keyButtonPointer.event;
			ev->subwindow 	= event->u.keyButtonPointer.child;
			ev->time 	= event->u.keyButtonPointer.time;
			ev->x 		= cvtINT16toInt(event->u.keyButtonPointer.eventX);
			ev->y 		= cvtINT16toInt(event->u.keyButtonPointer.eventY);
			ev->x_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootX);
			ev->y_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootY);
			ev->state	= event->u.keyButtonPointer.state;
			ev->same_screen	= event->u.keyButtonPointer.sameScreen;
			ev->keycode 	= event->u.u.detail;
		}
	      	break;
	      case ButtonPress:
	      case ButtonRelease:
	        {
			register XButtonEvent *ev =  (XButtonEvent *) re;
			ev->root 	= event->u.keyButtonPointer.root;
			ev->window 	= event->u.keyButtonPointer.event;
			ev->subwindow 	= event->u.keyButtonPointer.child;
			ev->time 	= event->u.keyButtonPointer.time;
			ev->x 		= cvtINT16toInt(event->u.keyButtonPointer.eventX);
			ev->y 		= cvtINT16toInt(event->u.keyButtonPointer.eventY);
			ev->x_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootX);
			ev->y_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootY);
			ev->state	= event->u.keyButtonPointer.state;
			ev->same_screen	= event->u.keyButtonPointer.sameScreen;
			ev->button 	= event->u.u.detail;
		}
	        break;
	      case MotionNotify:
	        {
			register XMotionEvent *ev =   (XMotionEvent *)re;
			ev->root 	= event->u.keyButtonPointer.root;
			ev->window 	= event->u.keyButtonPointer.event;
			ev->subwindow 	= event->u.keyButtonPointer.child;
			ev->time 	= event->u.keyButtonPointer.time;
			ev->x 		= cvtINT16toInt(event->u.keyButtonPointer.eventX);
			ev->y 		= cvtINT16toInt(event->u.keyButtonPointer.eventY);
			ev->x_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootX);
			ev->y_root 	= cvtINT16toInt(event->u.keyButtonPointer.rootY);
			ev->state	= event->u.keyButtonPointer.state;
			ev->same_screen	= event->u.keyButtonPointer.sameScreen;
			ev->is_hint 	= event->u.u.detail;
		}
	        break;
	      case EnterNotify:
	      case LeaveNotify:
		{
			register XCrossingEvent *ev   = (XCrossingEvent *) re;
			ev->root	= event->u.enterLeave.root;
			ev->window	= event->u.enterLeave.event;
			ev->subwindow	= event->u.enterLeave.child;
			ev->time	= event->u.enterLeave.time;
			ev->x		= cvtINT16toInt(event->u.enterLeave.eventX);
			ev->y		= cvtINT16toInt(event->u.enterLeave.eventY);
			ev->x_root	= cvtINT16toInt(event->u.enterLeave.rootX);
			ev->y_root	= cvtINT16toInt(event->u.enterLeave.rootY);
			ev->state	= event->u.enterLeave.state;
			ev->mode	= event->u.enterLeave.mode;
			ev->same_screen = (event->u.enterLeave.flags & 
				ELFlagSameScreen) && True;
			ev->focus	= (event->u.enterLeave.flags &
			  	ELFlagFocus) && True;
			ev->detail	= event->u.u.detail;
		}
		  break;
	      case FocusIn:
	      case FocusOut:
		{
			register XFocusChangeEvent *ev = (XFocusChangeEvent *) re;
			ev->window 	= event->u.focus.window;
			ev->mode	= event->u.focus.mode;
			ev->detail	= event->u.u.detail;
		}
		  break;
	      case KeymapNotify:
		{
			register XKeymapEvent *ev = (XKeymapEvent *) re;
			ev->window	= None;
			memcpy(&ev->key_vector[1],
			       (char *)((xKeymapEvent *) event)->map,
			       sizeof (((xKeymapEvent *) event)->map));
		}
		break;
	      case Expose:
		{
			register XExposeEvent *ev = (XExposeEvent *) re;
			ev->window	= event->u.expose.window;
			ev->x		= event->u.expose.x;
			ev->y		= event->u.expose.y;
			ev->width	= event->u.expose.width;
			ev->height	= event->u.expose.height;
			ev->count	= event->u.expose.count;
		}
		break;
	      case GraphicsExpose:
		{
		    register XGraphicsExposeEvent *ev =
			(XGraphicsExposeEvent *) re;
		    ev->drawable	= event->u.graphicsExposure.drawable;
		    ev->x		= event->u.graphicsExposure.x;
		    ev->y		= event->u.graphicsExposure.y;
		    ev->width		= event->u.graphicsExposure.width;
		    ev->height		= event->u.graphicsExposure.height;
		    ev->count		= event->u.graphicsExposure.count;
		    ev->major_code	= event->u.graphicsExposure.majorEvent;
		    ev->minor_code	= event->u.graphicsExposure.minorEvent;
		}
		break;
	      case NoExpose:
		{
		    register XNoExposeEvent *ev = (XNoExposeEvent *) re;
		    ev->drawable	= event->u.noExposure.drawable;
		    ev->major_code	= event->u.noExposure.majorEvent;
		    ev->minor_code	= event->u.noExposure.minorEvent;
		}
		break;
	      case VisibilityNotify:
		{
		    register XVisibilityEvent *ev = (XVisibilityEvent *) re;
		    ev->window		= event->u.visibility.window;
		    ev->state		= event->u.visibility.state;
		}
		break;
	      case CreateNotify:
		{
		    register XCreateWindowEvent *ev =
			 (XCreateWindowEvent *) re;
		    ev->window		= event->u.createNotify.window;
		    ev->parent		= event->u.createNotify.parent;
		    ev->x		= cvtINT16toInt(event->u.createNotify.x);
		    ev->y		= cvtINT16toInt(event->u.createNotify.y);
		    ev->width		= event->u.createNotify.width;
		    ev->height		= event->u.createNotify.height;
		    ev->border_width	= event->u.createNotify.borderWidth;
		    ev->override_redirect	= event->u.createNotify.override;
		}
		break;
	      case DestroyNotify:
		{
		    register XDestroyWindowEvent *ev =
				(XDestroyWindowEvent *) re;
		    ev->window		= event->u.destroyNotify.window;
		    ev->event		= event->u.destroyNotify.event;
		}
		break;
	      case UnmapNotify:
		{
		    register XUnmapEvent *ev = (XUnmapEvent *) re;
		    ev->window		= event->u.unmapNotify.window;
		    ev->event		= event->u.unmapNotify.event;
		    ev->from_configure	= event->u.unmapNotify.fromConfigure;
		}
		break;
	      case MapNotify:
		{
		    register XMapEvent *ev = (XMapEvent *) re;
		    ev->window		= event->u.mapNotify.window;
		    ev->event		= event->u.mapNotify.event;
		    ev->override_redirect	= event->u.mapNotify.override;
		}
		break;
	      case MapRequest:
		{
		    register XMapRequestEvent *ev = (XMapRequestEvent *) re;
		    ev->window		= event->u.mapRequest.window;
		    ev->parent		= event->u.mapRequest.parent;
		}
		break;
	      case ReparentNotify:
		{
		    register XReparentEvent *ev = (XReparentEvent *) re;
		    ev->event		= event->u.reparent.event;
		    ev->window		= event->u.reparent.window;
		    ev->parent		= event->u.reparent.parent;
		    ev->x		= cvtINT16toInt(event->u.reparent.x);
		    ev->y		= cvtINT16toInt(event->u.reparent.y);
		    ev->override_redirect	= event->u.reparent.override;
		}
		break;
	      case ConfigureNotify:
		{
		    register XConfigureEvent *ev = (XConfigureEvent *) re;
		    ev->event	= event->u.configureNotify.event;
		    ev->window	= event->u.configureNotify.window;
		    ev->above	= event->u.configureNotify.aboveSibling;
		    ev->x	= cvtINT16toInt(event->u.configureNotify.x);
		    ev->y	= cvtINT16toInt(event->u.configureNotify.y);
		    ev->width	= event->u.configureNotify.width;
		    ev->height	= event->u.configureNotify.height;
		    ev->border_width  = event->u.configureNotify.borderWidth;
		    ev->override_redirect = event->u.configureNotify.override;
		}
		break;
	      case ConfigureRequest:
		{
		    register XConfigureRequestEvent *ev =
		        (XConfigureRequestEvent *) re;
		    ev->window		= event->u.configureRequest.window;
		    ev->parent		= event->u.configureRequest.parent;
		    ev->above		= event->u.configureRequest.sibling;
		    ev->x		= cvtINT16toInt(event->u.configureRequest.x);
		    ev->y		= cvtINT16toInt(event->u.configureRequest.y);
		    ev->width		= event->u.configureRequest.width;
		    ev->height		= event->u.configureRequest.height;
		    ev->border_width	= event->u.configureRequest.borderWidth;
		    ev->value_mask	= event->u.configureRequest.valueMask;
		    ev->detail  	= event->u.u.detail;
		}
		break;
	      case GravityNotify:
		{
		    register XGravityEvent *ev = (XGravityEvent *) re;
		    ev->window		= event->u.gravity.window;
		    ev->event		= event->u.gravity.event;
		    ev->x		= cvtINT16toInt(event->u.gravity.x);
		    ev->y		= cvtINT16toInt(event->u.gravity.y);
		}
		break;
	      case ResizeRequest:
		{
		    register XResizeRequestEvent *ev =
			(XResizeRequestEvent *) re;
		    ev->window		= event->u.resizeRequest.window;
		    ev->width		= event->u.resizeRequest.width;
		    ev->height		= event->u.resizeRequest.height;
		}
		break;
	      case CirculateNotify:
		{
		    register XCirculateEvent *ev = (XCirculateEvent *) re;
		    ev->window		= event->u.circulate.window;
		    ev->event		= event->u.circulate.event;
		    ev->place		= event->u.circulate.place;
		}
		break;
	      case CirculateRequest:
		{
		    register XCirculateRequestEvent *ev =
		        (XCirculateRequestEvent *) re;
		    ev->window		= event->u.circulate.window;
		    ev->parent		= event->u.circulate.event;
		    ev->place		= event->u.circulate.place;
		}
		break;
	      case PropertyNotify:
		{
		    register XPropertyEvent *ev = (XPropertyEvent *) re;
		    ev->window		= event->u.property.window;
		    ev->atom		= event->u.property.atom;
		    ev->time		= event->u.property.time;
		    ev->state		= event->u.property.state;
		}
		break;
	      case SelectionClear:
		{
		    register XSelectionClearEvent *ev =
			 (XSelectionClearEvent *) re;
		    ev->window		= event->u.selectionClear.window;
		    ev->selection	= event->u.selectionClear.atom;
		    ev->time		= event->u.selectionClear.time;
		}
		break;
	      case SelectionRequest:
		{
		    register XSelectionRequestEvent *ev =
		        (XSelectionRequestEvent *) re;
		    ev->owner		= event->u.selectionRequest.owner;
		    ev->requestor	= event->u.selectionRequest.requestor;
		    ev->selection	= event->u.selectionRequest.selection;
		    ev->target		= event->u.selectionRequest.target;
		    ev->property	= event->u.selectionRequest.property;
		    ev->time		= event->u.selectionRequest.time;
		}
		break;
	      case SelectionNotify:
		{
		    register XSelectionEvent *ev = (XSelectionEvent *) re;
		    ev->requestor	= event->u.selectionNotify.requestor;
		    ev->selection	= event->u.selectionNotify.selection;
		    ev->target		= event->u.selectionNotify.target;
		    ev->property	= event->u.selectionNotify.property;
		    ev->time		= event->u.selectionNotify.time;
		}
		break;
	      case ColormapNotify:
		{
		    register XColormapEvent *ev = (XColormapEvent *) re;
		    ev->window		= event->u.colormap.window;
		    ev->colormap	= event->u.colormap.colormap;
		    ev->new		= event->u.colormap.new;
		    ev->state		= event->u.colormap.state;
	        }
		break;
	      case ClientMessage:
		{
		   register int i;
		   register XClientMessageEvent *ev 
		   			= (XClientMessageEvent *) re;
		   ev->window		= event->u.clientMessage.window;
		   ev->format		= event->u.u.detail;
		   switch (ev->format) {
			case 8:	
			   ev->message_type = event->u.clientMessage.u.b.type;
			   for (i = 0; i < 20; i++) 	
			     ev->data.b[i] = event->u.clientMessage.u.b.bytes[i];
			   break;
			case 16:
			   ev->message_type = event->u.clientMessage.u.s.type;
			   ev->data.s[0] = cvtINT16toShort(event->u.clientMessage.u.s.shorts0);
			   ev->data.s[1] = cvtINT16toShort(event->u.clientMessage.u.s.shorts1);
			   ev->data.s[2] = cvtINT16toShort(event->u.clientMessage.u.s.shorts2);
			   ev->data.s[3] = cvtINT16toShort(event->u.clientMessage.u.s.shorts3);
			   ev->data.s[4] = cvtINT16toShort(event->u.clientMessage.u.s.shorts4);
			   ev->data.s[5] = cvtINT16toShort(event->u.clientMessage.u.s.shorts5);
			   ev->data.s[6] = cvtINT16toShort(event->u.clientMessage.u.s.shorts6);
			   ev->data.s[7] = cvtINT16toShort(event->u.clientMessage.u.s.shorts7);
			   ev->data.s[8] = cvtINT16toShort(event->u.clientMessage.u.s.shorts8);
			   ev->data.s[9] = cvtINT16toShort(event->u.clientMessage.u.s.shorts9);
			   break;
			case 32:
			   ev->message_type = event->u.clientMessage.u.l.type;
			   ev->data.l[0] = cvtINT32toLong(event->u.clientMessage.u.l.longs0);
			   ev->data.l[1] = cvtINT32toLong(event->u.clientMessage.u.l.longs1);
			   ev->data.l[2] = cvtINT32toLong(event->u.clientMessage.u.l.longs2);
			   ev->data.l[3] = cvtINT32toLong(event->u.clientMessage.u.l.longs3);
			   ev->data.l[4] = cvtINT32toLong(event->u.clientMessage.u.l.longs4);
			   break;
			default: /* XXX should never occur */
				break;
		    }
	        }
		break;
	      case MappingNotify:
		{
		   register XMappingEvent *ev = (XMappingEvent *)re;
		   ev->window		= 0;
		   ev->first_keycode 	= event->u.mappingNotify.firstKeyCode;
		   ev->request 		= event->u.mappingNotify.request;
		   ev->count 		= event->u.mappingNotify.count;
		}
		break;
	      default:
		return(_XUnknownWireEvent(dpy, re, event));
	}
	return(True);
}


/*
 * _XDefaultIOError - Default fatal system error reporting routine.  Called 
 * when an X internal system error is encountered.
 */
int _XDefaultIOError(
	Display *dpy)
{
	if (ECHECK(EPIPE)) {
	    (void) fprintf (stderr,
	"X connection to %s broken (explicit kill or server shutdown).\r\n",
			    DisplayString (dpy));
	} else {
	    (void) fprintf (stderr, 
			"XIO:  fatal IO error %d (%s) on X server \"%s\"\r\n",
#ifdef WIN32
			WSAGetLastError(), strerror(WSAGetLastError()),
#else
			errno, strerror (errno),
#endif
			DisplayString (dpy));
	    (void) fprintf (stderr, 
	 "      after %lu requests (%lu known processed) with %d events remaining.\r\n",
			NextRequest(dpy) - 1, LastKnownRequestProcessed(dpy),
			QLength(dpy));

	}
	exit(1);
        return(0); /* dummy - function should never return */
}


static int _XPrintDefaultError(
    Display *dpy,
    XErrorEvent *event,
    FILE *fp)
{
    char buffer[BUFSIZ];
    char mesg[BUFSIZ];
    char number[32];
    char *mtype = "XlibMessage";
    register _XExtension *ext = (_XExtension *)NULL;
    _XExtension *bext = (_XExtension *)NULL;
    XGetErrorText(dpy, event->error_code, buffer, BUFSIZ);
    XGetErrorDatabaseText(dpy, mtype, "XError", "X Error", mesg, BUFSIZ);
    (void) fprintf(fp, "%s:  %s\n  ", mesg, buffer);
    XGetErrorDatabaseText(dpy, mtype, "MajorCode", "Request Major code %d", 
	mesg, BUFSIZ);
    (void) fprintf(fp, mesg, event->request_code);
    if (event->request_code < 128) {
	sprintf(number, "%d", event->request_code);
	XGetErrorDatabaseText(dpy, "XRequest", number, "", buffer, BUFSIZ);
    } else {
	for (ext = dpy->ext_procs;
	     ext && (ext->codes.major_opcode != event->request_code);
	     ext = ext->next)
	  ;
	if (ext)
	    strcpy(buffer, ext->name);
	else
	    buffer[0] = '\0';
    }
    (void) fprintf(fp, " (%s)\n", buffer);
    if (event->request_code >= 128) {
	XGetErrorDatabaseText(dpy, mtype, "MinorCode", "Request Minor code %d",
			      mesg, BUFSIZ);
	fputs("  ", fp);
	(void) fprintf(fp, mesg, event->minor_code);
	if (ext) {
	    sprintf(mesg, "%s.%d", ext->name, event->minor_code);
	    XGetErrorDatabaseText(dpy, "XRequest", mesg, "", buffer, BUFSIZ);
	    (void) fprintf(fp, " (%s)", buffer);
	}
	fputs("\n", fp);
    }
    if (event->error_code >= 128) {
	/* kludge, try to find the extension that caused it */
	buffer[0] = '\0';
	for (ext = dpy->ext_procs; ext; ext = ext->next) {
	    if (ext->error_string) 
		(*ext->error_string)(dpy, event->error_code, &ext->codes,
				     buffer, BUFSIZ);
	    if (buffer[0]) {
		bext = ext;
		break;
	    }
	    if (ext->codes.first_error &&
		ext->codes.first_error < (int)event->error_code &&
		(!bext || ext->codes.first_error > bext->codes.first_error))
		bext = ext;
	}    
	if (bext)
	    sprintf(buffer, "%s.%d", bext->name,
		    event->error_code - bext->codes.first_error);
	else
	    strcpy(buffer, "Value");
	XGetErrorDatabaseText(dpy, mtype, buffer, "", mesg, BUFSIZ);
	if (mesg[0]) {
	    fputs("  ", fp);
	    (void) fprintf(fp, mesg, event->resourceid);
	    fputs("\n", fp);
	}
	/* let extensions try to print the values */
	for (ext = dpy->ext_procs; ext; ext = ext->next) {
	    if (ext->error_values)
		(*ext->error_values)(dpy, event, fp);
	}
    } else if ((event->error_code == BadWindow) ||
	       (event->error_code == BadPixmap) ||
	       (event->error_code == BadCursor) ||
	       (event->error_code == BadFont) ||
	       (event->error_code == BadDrawable) ||
	       (event->error_code == BadColor) ||
	       (event->error_code == BadGC) ||
	       (event->error_code == BadIDChoice) ||
	       (event->error_code == BadValue) ||
	       (event->error_code == BadAtom)) {
	if (event->error_code == BadValue)
	    XGetErrorDatabaseText(dpy, mtype, "Value", "Value 0x%x",
				  mesg, BUFSIZ);
	else if (event->error_code == BadAtom)
	    XGetErrorDatabaseText(dpy, mtype, "AtomID", "AtomID 0x%x",
				  mesg, BUFSIZ);
	else
	    XGetErrorDatabaseText(dpy, mtype, "ResourceID", "ResourceID 0x%x",
				  mesg, BUFSIZ);
	fputs("  ", fp);
	(void) fprintf(fp, mesg, event->resourceid);
	fputs("\n", fp);
    }
    XGetErrorDatabaseText(dpy, mtype, "ErrorSerial", "Error Serial #%d", 
			  mesg, BUFSIZ);
    fputs("  ", fp);
    (void) fprintf(fp, mesg, event->serial);
    XGetErrorDatabaseText(dpy, mtype, "CurrentSerial", "Current Serial #%d",
			  mesg, BUFSIZ);
    fputs("\n  ", fp);
    (void) fprintf(fp, mesg, dpy->request);
    fputs("\n", fp);
    if (event->error_code == BadImplementation) return 0;
    return 1;
}

int _XDefaultError(
	Display *dpy,
	XErrorEvent *event)
{
    if (_XPrintDefaultError (dpy, event, stderr) == 0) return 0;
    exit(1);
    /*NOTREACHED*/
}

/*ARGSUSED*/
Bool _XDefaultWireError(display, he, we)
    Display     *display;
    XErrorEvent *he;
    xError      *we;
{
    return True;
}

/*
 * _XError - upcall internal or user protocol error handler
 */
int _XError (
    Display *dpy,
    register xError *rep)
{
    /* 
     * X_Error packet encountered!  We need to unpack the error before
     * giving it to the user.
     */
    XEvent event; /* make it a large event */
    register _XAsyncHandler *async, *next;

    event.xerror.serial = _XSetLastRequestRead(dpy, (xGenericReply *)rep);

    for (async = dpy->async_handlers; async; async = next) {
	next = async->next;
	if ((*async->handler)(dpy, (xReply *)rep,
			      (char *)rep, SIZEOF(xError), async->data))
	    return 0;
    }

    event.xerror.display = dpy;
    event.xerror.type = X_Error;
    event.xerror.resourceid = rep->resourceID;
    event.xerror.error_code = rep->errorCode;
    event.xerror.request_code = rep->majorCode;
    event.xerror.minor_code = rep->minorCode;
    if (dpy->error_vec &&
	!(*dpy->error_vec[rep->errorCode])(dpy, &event.xerror, rep))
	return 0;
    if (_XErrorFunction != NULL) {
	int rtn_val;
#ifdef XTHREADS
	if (dpy->lock)
	    (*dpy->lock->user_lock_display)(dpy);
	UnlockDisplay(dpy);
#endif /* XTHREADS */
	rtn_val = (*_XErrorFunction)(dpy, (XErrorEvent *)&event); /* upcall */
#ifdef XTHREADS
	LockDisplay(dpy);
	if (dpy->lock)
	    (*dpy->lock->user_unlock_display)(dpy);
#endif /* XTHREADS */
	return rtn_val;
    } else {
	return _XDefaultError(dpy, (XErrorEvent *)&event);
    }
}
    
/*
 * _XIOError - call user connection error handler and exit
 */
int
_XIOError (
    Display *dpy)
{
    dpy->flags |= XlibDisplayIOError;
#ifdef WIN32
    errno = WSAGetLastError();
#endif

    if (_XIOErrorFunction != NULL)
	(*_XIOErrorFunction)(dpy);
    else
	_XDefaultIOError(dpy);
    exit (1);
    return 0;
}


/*
 * This routine can be used to (cheaply) get some memory within a single
 * Xlib routine for scratch space.  A single buffer is reused each time
 * if possible.  To be MT safe, you can only call this between a call to
 * GetReq* and a call to Data* or _XSend*, or in a context when the thread
 * is guaranteed to not unlock the display.
 */
char *_XAllocScratch(
	register Display *dpy,
	unsigned long nbytes)
{
	if (nbytes > dpy->scratch_length) {
	    if (dpy->scratch_buffer) Xfree (dpy->scratch_buffer);
	    if ((dpy->scratch_buffer = Xmalloc((unsigned) nbytes)))
		dpy->scratch_length = nbytes;
	    else dpy->scratch_length = 0;
	}
	return (dpy->scratch_buffer);
}

/*
 * Scratch space allocator you can call any time, multiple times, and be
 * MT safe, but you must hand the buffer back with _XFreeTemp.
 */
char *_XAllocTemp(
    register Display *dpy,
    unsigned long nbytes)
{
    char *buf;

    buf = _XAllocScratch(dpy, nbytes);
    dpy->scratch_buffer = NULL;
    dpy->scratch_length = 0;
    return buf;
}

void _XFreeTemp(
    register Display *dpy,
    char *buf,
    unsigned long nbytes)
{
    if (dpy->scratch_buffer)
	Xfree(dpy->scratch_buffer);
    dpy->scratch_buffer = buf;
    dpy->scratch_length = nbytes;
}

/*
 * Given a visual id, find the visual structure for this id on this display.
 */
Visual *_XVIDtoVisual(
	Display *dpy,
	VisualID id)
{
	register int i, j, k;
	register Screen *sp;
	register Depth *dp;
	register Visual *vp;
	for (i = 0; i < dpy->nscreens; i++) {
		sp = &dpy->screens[i];
		for (j = 0; j < sp->ndepths; j++) {
			dp = &sp->depths[j];
			/* if nvisuals == 0 then visuals will be NULL */
			for (k = 0; k < dp->nvisuals; k++) {
				vp = &dp->visuals[k];
				if (vp->visualid == id) return (vp);
			}
		}
	}
	return (NULL);
}

int
XFree (void *data)
{
	Xfree (data);
	return 1;
}

#ifdef _XNEEDBCOPYFUNC
void _Xbcopy(b1, b2, length)
    register char *b1, *b2;
    register length;
{
    if (b1 < b2) {
	b2 += length;
	b1 += length;
	while (length--)
	    *--b2 = *--b1;
    } else {
	while (length--)
	    *b2++ = *b1++;
    }
}
#endif

#ifdef DataRoutineIsProcedure
void Data(
	Display *dpy,
	char *data,
	long len)
{
	if (dpy->bufptr + (len) <= dpy->bufmax) {
		memcpy(dpy->bufptr, data, (int)len);
		dpy->bufptr += ((len) + 3) & ~3;
	} else {
		_XSend(dpy, data, len);
	}
}
#endif /* DataRoutineIsProcedure */


#ifdef LONG64
int
_XData32(
    Display *dpy,
    register long *data,
    unsigned len)
{
    register int *buf;
    register long i;

    while (len) {
	buf = (int *)dpy->bufptr;
	i = dpy->bufmax - (char *)buf;
	if (!i) {
	    _XFlush(dpy);
	    continue;
	}
	if (len < i)
	    i = len;
	dpy->bufptr = (char *)buf + i;
	len -= i;
	i >>= 2;
	while (--i >= 0)
	    *buf++ = *data++;
    }
    return 0;
}
#endif /* LONG64 */

#ifdef WORD64

/*
 * XXX This is a *really* stupid way of doing this.  It should just use 
 * dpy->bufptr directly, taking into account where in the word it is.
 */

/*
 * Data16 - Place 16 bit data in the buffer.
 *
 * "dpy" is a pointer to a Display.
 * "data" is a pointer to the data.
 * "len" is the length in bytes of the data.
 */

static doData16(
    register Display *dpy,
    short *data,
    unsigned len,
    char *packbuffer)
{
    long *lp,*lpack;
    long i, nwords,bits;
    long mask16 = 0x000000000000ffff;

        lp = (long *)data;
        lpack = (long *)packbuffer;

/*  nwords is the number of 16 bit values to be packed,
 *  the low order 16 bits of each word will be packed
 *  into 64 bit words
 */
        nwords = len >> 1;
        bits = 48;

        for(i=0;i<nwords;i++){
	   if (bits == 48) *lpack = 0;
           *lpack ^= (*lp & mask16) << bits;
           bits -= 16 ;
           lp++;
           if(bits < 0){
               lpack++;
               bits = 48;
           }
        }
        Data(dpy, packbuffer, len);
}

_XData16 (
    Display *dpy,
    short *data,
    unsigned len)
{
    char packbuffer[PACKBUFFERSIZE];
    unsigned nunits = PACKBUFFERSIZE >> 1;

    for (; len > PACKBUFFERSIZE; len -= PACKBUFFERSIZE, data += nunits) {
	doData16 (dpy, data, PACKBUFFERSIZE, packbuffer);
    }
    if (len) doData16 (dpy, data, len, packbuffer);
}

/*
 * Data32 - Place 32 bit data in the buffer.
 *
 * "dpy" is a pointer to a Display.
 * "data" is a pointer to the data.
 * "len" is the length in bytes of the data.
 */

static doData32(
    register Display *dpy
    long *data,
    unsigned len,
    char *packbuffer)
{
    long *lp,*lpack;
    long i,bits,nwords;
    long mask32 = 0x00000000ffffffff;

        lpack = (long *) packbuffer;
        lp = data;

/*  nwords is the number of 32 bit values to be packed
 *  the low order 32 bits of each word will be packed
 *  into 64 bit words
 */
        nwords = len >> 2;
        bits = 32;

        for(i=0;i<nwords;i++){
	   if (bits == 32) *lpack = 0;
           *lpack ^= (*lp & mask32) << bits;
           bits = bits ^32;
           lp++;
           if(bits)
              lpack++;
        }
        Data(dpy, packbuffer, len);
}

void _XData32(
    Display *dpy,
    long *data,
    unsigned len,
{
    char packbuffer[PACKBUFFERSIZE];
    unsigned nunits = PACKBUFFERSIZE >> 2;

    for (; len > PACKBUFFERSIZE; len -= PACKBUFFERSIZE, data += nunits) {
	doData32 (dpy, data, PACKBUFFERSIZE, packbuffer);
    }
    if (len) doData32 (dpy, data, len, packbuffer);
}

#endif /* WORD64 */


/* Make sure this produces the same string as DefineLocal/DefineSelf in xdm.
 * Otherwise, Xau will not be able to find your cookies in the Xauthority file.
 *
 * Note: POSIX says that the ``nodename'' member of utsname does _not_ have
 *       to have sufficient information for interfacing to the network,
 *       and so, you may be better off using gethostname (if it exists).
 */

#if (defined(_POSIX_SOURCE) && !defined(AIXV3) && !defined(__QNX__)) || defined(hpux) || defined(USG) || defined(SVR4)
#define NEED_UTSNAME
#include <sys/utsname.h>
#endif

/*
 * _XGetHostname - similar to gethostname but allows special processing.
 */
int _XGetHostname (
    char *buf,
    int maxlen)
{
    int len;

#ifdef NEED_UTSNAME
    struct utsname name;

    if (maxlen <= 0 || buf == NULL)
	return 0;

    uname (&name);
    len = strlen (name.nodename);
    if (len >= maxlen) len = maxlen - 1;
    strncpy (buf, name.nodename, len);
    buf[len] = '\0';
#else
    if (maxlen <= 0 || buf == NULL)
	return 0;

    buf[0] = '\0';
    (void) gethostname (buf, maxlen);
    buf [maxlen - 1] = '\0';
    len = strlen(buf);
#endif /* NEED_UTSNAME */
    return len;
}


/*
 * _XScreenOfWindow - get the Screen of a given window
 */

Screen *_XScreenOfWindow (dpy, w)
    Display *dpy;
    Window w;
{
    register int i;
    Window root;
    int x, y;				/* dummy variables */
    unsigned int width, height, bw, depth;  /* dummy variables */

    if (XGetGeometry (dpy, w, &root, &x, &y, &width, &height,
		      &bw, &depth) == False) {
	return None;
    }
    for (i = 0; i < ScreenCount (dpy); i++) {	/* find root from list */
	if (root == RootWindow (dpy, i)) {
	    return ScreenOfDisplay (dpy, i);
	}
    }
    return NULL;
}


#if defined(WIN32)

/*
 * These functions are intended to be used internally to Xlib only.
 * These functions will always prefix the path with a DOS drive in the
 * form "<drive-letter>:". As such, these functions are only suitable
 * for use by Xlib function that supply a root-based path to some
 * particular file, e.g. <ProjectRoot>/lib/X11/locale/locale.dir will
 * be converted to "C:/usr/X11R6.3/lib/X11/locale/locale.dir".
 */

static int access_file (path, pathbuf, len_pathbuf, pathret)
    char* path;
    char* pathbuf;
    int len_pathbuf;
    char** pathret;
{
    if (access (path, F_OK) == 0) {
	if (strlen (path) < len_pathbuf)
	    *pathret = pathbuf;
	else
	    *pathret = Xmalloc (strlen (path) + 1);
	if (*pathret) {
	    strcpy (*pathret, path);
	    return 1;
	}
    }
    return 0;
}

static int AccessFile (path, pathbuf, len_pathbuf, pathret)
    char* path;
    char* pathbuf;
    int len_pathbuf;
    char** pathret;
{
    unsigned long drives;
    int i, len;
    char* drive;
    char buf[MAX_PATH];
    char* bufp;

    /* just try the "raw" name first and see if it works */
    if (access_file (path, pathbuf, len_pathbuf, pathret))
	return 1;

    /* try the places set in the environment */
    drive = getenv ("_XBASEDRIVE");
#ifdef __UNIXOS2__
    if (!drive)
	drive = getenv ("X11ROOT");
#endif
    if (!drive)
	drive = "C:";
    len = strlen (drive) + strlen (path);
    if (len < MAX_PATH) bufp = buf;
    else bufp = Xmalloc (len + 1);
    strcpy (bufp, drive);
    strcat (bufp, path);
    if (access_file (bufp, pathbuf, len_pathbuf, pathret)) {
	if (bufp != buf) Xfree (bufp);
	return 1;
    }

#ifndef __UNIXOS2__ 
    /* one last place to look */
    drive = getenv ("HOMEDRIVE");
    if (drive) {
	len = strlen (drive) + strlen (path);
	if (len < MAX_PATH) bufp = buf;
	else bufp = Xmalloc (len + 1);
	strcpy (bufp, drive);
	strcat (bufp, path);
	if (access_file (bufp, pathbuf, len_pathbuf, pathret)) {
	    if (bufp != buf) Xfree (bufp);
	    return 1;
	}
    }

    /* tried everywhere else, go fishing */
#define C_DRIVE ('C' - 'A')
#define Z_DRIVE ('Z' - 'A')
    /* does OS/2 (with or with gcc-emx) have getdrives? */
    drives = _getdrives ();
    for (i = C_DRIVE; i <= Z_DRIVE; i++) { /* don't check on A: or B: */
	if ((1 << i) & drives) {
	    len = 2 + strlen (path);
	    if (len < MAX_PATH) bufp = buf;
	    else bufp = Xmalloc (len + 1);
	    *bufp = 'A' + i;
	    *(bufp + 1) = ':';
	    *(bufp + 2) = '\0';
	    strcat (bufp, path);
	    if (access_file (bufp, pathbuf, len_pathbuf, pathret)) {
		if (bufp != buf) Xfree (bufp);
		return 1;
	    }
	}
    }
#endif
    return 0;
}

int _XOpenFile(path, flags)
    _Xconst char* path;
    int flags;
{
    char buf[MAX_PATH];
    char* bufp;
    int ret = -1;
    UINT olderror = SetErrorMode (SEM_FAILCRITICALERRORS);

    if (AccessFile (path, buf, MAX_PATH, &bufp))
	ret = open (bufp, flags);

    (void) SetErrorMode (olderror);

    if (bufp != buf) Xfree (bufp);

    return ret;
}

void* _XFopenFile(path, mode)
    _Xconst char* path;
    _Xconst char* mode;
{
    char buf[MAX_PATH];
    char* bufp;
    void* ret = NULL;
    UINT olderror = SetErrorMode (SEM_FAILCRITICALERRORS);

    if (AccessFile (path, buf, MAX_PATH, &bufp))
	ret = fopen (bufp, mode);

    (void) SetErrorMode (olderror);

    if (bufp != buf) Xfree (bufp);

    return ret;
}

int _XAccessFile(path)
    _Xconst char* path;
{
    char buf[MAX_PATH];
    char* bufp;
    int ret = -1;
    UINT olderror = SetErrorMode (SEM_FAILCRITICALERRORS);

    ret = AccessFile (path, buf, MAX_PATH, &bufp);

    (void) SetErrorMode (olderror);

    if (bufp != buf) Xfree (bufp);

    return ret;
}

#endif