summaryrefslogtreecommitdiff
path: root/libc/stdio/stdio.c
blob: e54274112450ea4992755b66747baaa90fedb7a5 (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
/*  Copyright (C) 2002     Manuel Novoa III
 *  My stdio library for linux and (soon) elks.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Library General Public
 *  License as published by the Free Software Foundation; either
 *  version 2 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Library General Public License for more details.
 *
 *  You should have received a copy of the GNU Library General Public
 *  License along with this library; if not, write to the Free
 *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*  ATTENTION!   ATTENTION!   ATTENTION!   ATTENTION!   ATTENTION!
 *
 *  This code is currently under development.  Also, I plan to port
 *  it to elks which is a 16-bit environment with a fairly limited
 *  compiler.  Therefore, please refrain from modifying this code
 *  and, instead, pass any bug-fixes, etc. to me.  Thanks.  Manuel
 *
 *  ATTENTION!   ATTENTION!   ATTENTION!   ATTENTION!   ATTENTION! */

#define _ISOC99_SOURCE			/* for ULLONG primarily... */
#define _GNU_SOURCE
#define _STDIO_UTILITY			/* for _stdio_fdout and _uintmaxtostr. */
#include <stdio.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <stdint.h>
#include <stdarg.h>
#include <errno.h>
#include <assert.h>
#include <stdio_ext.h>
#include <unistd.h>
#include <fcntl.h>

#ifndef O_LARGEFILE		/* uClibc undefines this if no large file support. */
#ifdef __STDIO_LARGE_FILES
#error missing define for O_LARGEFILE!
#endif
#define O_LARGEFILE		0
#endif

/**********************************************************************/
/* First deal with some build issues... */

#ifndef __STDIO_THREADSAFE
/* Just build empty object files if any of these were defined. */
/* Note though that we do keep the various *_unlocked names as aliases. */
#undef L___fsetlocking
#undef L___flockfile
#undef L___ftrylockfile
#undef L___funlockfile
#endif

#ifndef __STDIO_LARGE_FILES
/* Just build empty object files if any of these were defined. */
#undef L_fopen64
#undef L_freopen64
#undef L_ftello64
#undef L_fseeko64
#undef L_fsetpos64
#undef L_fgetpos64
#endif

/**********************************************************************/

/* TODO -- make this the default except for bcc with it's broken preproc? */
#ifdef __UCLIBC__
#define _stdin stdin
#define _stdout stdout
#define _stderr stderr
#endif /* __UCLIBC__ */

/**********************************************************************/

#ifndef __STDIO_THREADSAFE

#define UNLOCKED_STREAM(RETURNTYPE,NAME,PARAMS,ARGS,STREAM) \
strong_alias(NAME,NAME##_unlocked) \
RETURNTYPE NAME PARAMS

#define UNLOCKED(RETURNTYPE,NAME,PARAMS,ARGS) \
	UNLOCKED_STREAM(RETURNTYPE,NAME,PARAMS,ARGS,stream)

#define UNLOCKED_VOID_RETURN(NAME,PARAMS,ARGS) \
strong_alias(NAME,NAME##_unlocked) \
void NAME PARAMS

#define __STDIO_THREADLOCK_OPENLIST
#define __STDIO_THREADUNLOCK_OPENLIST

#else  /* __STDIO_THREADSAFE */

#include <pthread.h>

#define UNLOCKED_STREAM(RETURNTYPE,NAME,PARAMS,ARGS,STREAM) \
RETURNTYPE NAME PARAMS \
{ \
	RETURNTYPE retval; \
	__STDIO_THREADLOCK(STREAM); \
	retval = NAME##_unlocked ARGS ; \
	__STDIO_THREADUNLOCK(STREAM); \
	return retval; \
} \
RETURNTYPE NAME##_unlocked PARAMS

#define UNLOCKED(RETURNTYPE,NAME,PARAMS,ARGS) \
	UNLOCKED_STREAM(RETURNTYPE,NAME,PARAMS,ARGS,stream)

#define UNLOCKED_VOID_RETURN(NAME,PARAMS,ARGS) \
void NAME PARAMS \
{ \
	__STDIO_THREADLOCK(stream); \
	NAME##_unlocked ARGS ; \
	__STDIO_THREADUNLOCK(stream); \
} \
void NAME##_unlocked PARAMS

#define __STDIO_THREADLOCK_OPENLIST \
	pthread_mutex_lock(&_stdio_openlist_lock)

#define __STDIO_THREADUNLOCK_OPENLIST \
	pthread_mutex_unlock(&_stdio_openlist_lock)

#define __STDIO_THREADTRYLOCK_OPENLIST \
	pthread_mutex_trylock(&_stdio_openlist_lock)

#endif /* __STDIO_THREADSAFE */

/**********************************************************************/

#ifdef __STDIO_WIDE
#define __STDIO_FILE_INIT_UNGOT		{ 0, 0 }, { 0, 0 },
#else
#define __STDIO_FILE_INIT_UNGOT		{ 0, 0 },
#endif

#ifdef __STDIO_GETC_MACRO
#define __STDIO_FILE_INIT_BUFGETC(x) x,
#else
#define __STDIO_FILE_INIT_BUFGETC(x)
#endif

#ifdef __STDIO_PUTC_MACRO
#define __STDIO_FILE_INIT_BUFPUTC(x) x,
#else
#define __STDIO_FILE_INIT_BUFPUTC(x)
#endif

#if defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS)
#define __STDIO_FILE_INIT_NEXT(next)	(next),
#else  /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */
#define __STDIO_FILE_INIT_NEXT(next)
#endif /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */

#ifdef __STDIO_BUFFERS
#define __STDIO_FILE_INIT_BUFFERS(buf,bufsize) \
	(buf), (buf)+(bufsize), (buf), (buf),
#else
#define __STDIO_FILE_INIT_BUFFERS(buf,bufsize)
#endif

#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
#define __STDIO_FILE_INIT_CUSTOM_STREAM(stream) \
	&((stream).filedes), { _cs_read, _cs_write, NULL, _cs_close },
#else
#define __STDIO_FILE_INIT_CUSTOM_STREAM(stream)
#endif

#ifdef __STDIO_THREADSAFE
#define __STDIO_FILE_INIT_THREADSAFE \
	0, PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP,
#else
#define __STDIO_FILE_INIT_THREADSAFE
#endif

#define __STDIO_INIT_FILE_STRUCT(stream, flags, filedes, next, buf, bufsize) \
	{ (flags), \
	__STDIO_FILE_INIT_UNGOT \
	(filedes), \
	__STDIO_FILE_INIT_NEXT(next) \
	__STDIO_FILE_INIT_BUFFERS(buf,bufsize) \
	__STDIO_FILE_INIT_BUFGETC((buf)) \
	__STDIO_FILE_INIT_BUFPUTC((buf)) \
	__STDIO_FILE_INIT_CUSTOM_STREAM(stream) \
	__STDIO_FILE_INIT_THREADSAFE \
} /* TODO: mbstate and builtin buf */

#ifdef __STDIO_MBSTATE_DATA
extern void _init_mbstate(mbstate_t *dest);

#define __COMMA_CLEAN_MBSTATE        , 0
#define __COPY_MBSTATE(dest,src)  memcpy(dest, src, sizeof(mbstate_t))
#define __INIT_MBSTATE(dest) _init_mbstate(dest)
#else
#define __COMMA_CLEAN_MBSTATE
#define __COPY_MBSTATE(dest,src)
#define __INIT_MBSTATE(dest)
#endif

#ifdef __STDIO_GLIBC_CUSTOM_STREAMS

/* TODO -- what does glibc do for undefined funcs?  errno set? */
#define __READ(STREAMPTR,BUF,SIZE) \
	((((STREAMPTR)->gcs.read) == NULL) ? -1 : \
	(((STREAMPTR)->gcs.read)((STREAMPTR)->cookie,(BUF),(SIZE))))
#define __WRITE(STREAMPTR,BUF,SIZE) \
	((((STREAMPTR)->gcs.write) == NULL) ? -1 : \
	(((STREAMPTR)->gcs.write)((STREAMPTR)->cookie,(BUF),(SIZE))))
#define __CLOSE(STREAMPTR) \
	((((STREAMPTR)->gcs.close) == NULL) ? 0 : \
	(((STREAMPTR)->gcs.close)((STREAMPTR)->cookie)))

#else  /* __STDIO_GLIBC_CUSTOM_STREAMS */

#define __READ(STREAMPTR,BUF,SIZE) \
	(read((STREAMPTR)->filedes,(BUF),(SIZE)))
#define __WRITE(STREAMPTR,BUF,SIZE) \
	(write((STREAMPTR)->filedes,(BUF),(SIZE)))
#define __CLOSE(STREAMPTR) \
	(close((STREAMPTR)->filedes))

#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */

/**********************************************************************/
/* POSIX functions */
/**********************************************************************/
#ifdef L_getw

/* SUSv2 Legacy function -- need not be reentrant. */

int getw (register FILE *stream)
{
	int aw[1];

#ifdef __STDIO_WIDE

	return (fread((void *)aw, sizeof(int), 1, stream) > 0) ? (*aw) : EOF;

#else  /* __STDIO_WIDE */

	return (_stdio_fread((unsigned char *)(aw), sizeof(int), stream)
			== sizeof(int)) ? (*aw) : EOF;

#endif /* __STDIO_WIDE */
}

#endif
/**********************************************************************/
#ifdef L_putw

/* SUSv2 Legacy function -- need not be reentrant. */

int putw (int w, register FILE *stream)
{
	int aw[1];

	*aw = w;					/* In case 'w' is in a register... */

#ifdef __STDIO_WIDE

	return (fwrite((void *)aw, sizeof(int), 1, stream) == 1) ? 0 : EOF;

#else  /* __STDIO_WIDE */

	return (_stdio_fwrite((unsigned char *)aw, sizeof(int), stream)
			== sizeof(int)) ? 0 : EOF;

#endif /* __STDIO_WIDE */
}

#endif
/**********************************************************************/
#ifdef L_fileno

/* Reentrancy handled by UNLOCKED() macro. */

UNLOCKED(int,fileno,(register FILE *stream),(stream))
{
#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
	return ( ((stream->cookie == &(stream->filedes)) && (stream->filedes >= 0))
			 ? stream->filedes
			 : (__set_errno(EBADF), -1) );
#else  /* __STDIO_GLIBC_CUSTOM_STREAMS */
	return (stream->filedes >= 0) ? stream->filedes : (__set_errno(EBADF), -1);
#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
}

#endif
/**********************************************************************/
#ifdef L_fdopen

/* No reentrancy issues. */

FILE *fdopen(int filedes, const char *mode)
{
	register char *cur_mode;	/* TODO -- replace by intptr_t?? */

	return (((int)(cur_mode = (char *) fcntl(filedes, F_GETFL))) != -1)
		? _stdio_fopen(cur_mode, mode, NULL, filedes) 
		: NULL;
}

#endif
/**********************************************************************/
#ifdef L_fopen64

/* No reentrancy issues. */

FILE *fopen64(const char * __restrict filename, const char * __restrict mode)
{
	return _stdio_fopen(filename, mode, NULL, -2);
}

#endif
/**********************************************************************/
/* BSD functions */
/**********************************************************************/
#ifdef L_setbuffer

/* No reentrancy issues. */

void setbuffer(FILE * __restrict stream, register char * __restrict buf,
			   size_t size)
{
#ifdef __STDIO_BUFFERS
	setvbuf(stream, buf, (buf ? _IOFBF : _IONBF), size);
#else  /* __STDIO_BUFFERS */
	/* Nothing to do. */
#endif /* __STDIO_BUFFERS */
}

#endif
/**********************************************************************/
#ifdef L_setlinebuf

/* No reentrancy issues. */

void setlinebuf(FILE * __restrict stream)
{
#ifdef __STDIO_BUFFERS
	setvbuf(stream, NULL, _IOLBF, (size_t) BUFSIZ);
#else  /* __STDIO_BUFFERS */
	/* Nothing to do. */
#endif /* __STDIO_BUFFERS */
}

#endif
/**********************************************************************/
/* GLIBC functions */
/**********************************************************************/
#ifdef L_fcloseall

/* NOTE: GLIBC difference!!! -- fcloseall
 * According to the info pages, glibc actually fclose()s all open files.
 * Apparently, glibc's new version only fflush()s and unbuffers all
 * writing streams to cope with unordered destruction of c++ static
 * objects.  Here we implement the old behavior as default.
 */

/* Not reentrant. */

int fcloseall (void)
{
#if defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS)
	register FILE *stream;
	int rv;

	_stdio_term();				/* Let _stdio_term() do all the work. */

	rv = 0;
	for (stream = _stdio_openlist ; stream ; stream = stream->nextopen) {
		if (stream->modeflags & (__FLAG_WRITING|__FLAG_ERROR)) {
			/* TODO -- is this correct?  Maybe ferror set before flush...
			* could check if pending writable but what if term unbuffers?
			* in that case, could clear error flag... */
			rv = EOF;			/* Only care about failed writes. */
		}
	}

	/* Make sure _stdio_term() does nothing on exit. */
	_stdio_openlist = NULL;

	return rv;
#else  /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */

	return 0;

#endif /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */
}

#endif
/**********************************************************************/
#ifdef L_fmemopen
#ifdef __STDIO_GLIBC_CUSTOM_STREAMS

typedef struct {
	size_t pos;
	size_t len;
	size_t eof;
	int dynbuf;
	unsigned char *buf;
	FILE *fp;
} __fmo_cookie;

#define COOKIE ((__fmo_cookie *) cookie)

static ssize_t fmo_read(void *cookie, register char *buf, size_t bufsize)
{
	size_t count = COOKIE->len - COOKIE->pos;

	/* Note: bufsize < SSIZE_MAX because of _stdio_READ. */

	if (bufsize > count) {
		bufsize = count;
	}

#if 1							/* TODO - choose code option */
	memcpy(buf, COOKIE->buf + COOKIE->pos, bufsize);
	COOKIE->pos += bufsize;
#else
	{
		register char *p = COOKIE->buf + COOKIE->pos;

		count = bufsize;
		while (count) {
			*buf++ = *p++;
			--count;
		}
		COOKIE->pos += bufsize;
	}
#endif

	return bufsize;
}

static ssize_t fmo_write(void *cookie, register const char *buf, size_t bufsize)
{
	size_t count;

	/* Note: bufsize < SSIZE_MAX because of _stdio_WRITE. */

	/* If appending, need to seek to end of file!!!! */
	if (COOKIE->fp->modeflags & __FLAG_APPEND) {
		COOKIE->pos = COOKIE->eof;
	}

	count = COOKIE->len - COOKIE->pos;

	if (bufsize > count) {
		bufsize = count;
		if (count == 0) {		/* We're at the end of the buffer... */
			errno = EFBIG;
			return -1;
		}
	}

#if 1							/* TODO - choose code option */
	memcpy(COOKIE->buf + COOKIE->pos, buf, bufsize);
	COOKIE->pos += bufsize;

	if (COOKIE->pos > COOKIE->eof) {
		COOKIE->eof = COOKIE->pos;
		if (bufsize < count) {	/* New eof and still room in buffer? */
			*(COOKIE->buf + COOKIE->pos) = 0;
		}
	}

#else
	{
		register char *p = COOKIE->buf + COOKIE->pos;
		size_t i = bufsize;

		while (i > 0) {
			*p++ = *buf++;
			--i;
		}
		COOKIE->pos += bufsize;

		if (COOKIE->pos > COOKIE->eof) {
			COOKIE->eof = COOKIE->pos;
			if (bufsize < count) {	/* New eof and still room in buffer? */
				*p = 0;
			}
		}
	}

#endif

	return bufsize;
}

/* glibc doesn't allow seeking, but it has in-buffer seeks... we don't. */
static int fmo_seek(void *cookie, __offmax_t *pos, int whence)
{
	__offmax_t p = *pos;

	/* Note: fseek already checks that whence is legal, so don't check here
	 * unless debugging. */
	assert(((unsigned int) whence) <= 2);

	if (whence != SEEK_SET) {
		p += (whence == SEEK_CUR) ? COOKIE->pos : /* SEEK_END */ COOKIE->eof;
	}

	/* Note: glibc only allows seeking in the buffer.  We'll actually restrict
	 * to the data. */
	/* Check for offset < 0, offset > eof, or offset overflow... */
	if (((uintmax_t) p) > COOKIE->eof) {
		return -1;
	}

	COOKIE->pos = *pos = p;
	return 0;
}

static int fmo_close(void *cookie)
{
	if (COOKIE->dynbuf) {
		free(COOKIE->buf);
	}
	free(cookie);
	return 0;
}

#undef COOKIE

static const cookie_io_functions_t _fmo_io_funcs = {
	fmo_read, fmo_write, fmo_seek, fmo_close
};

/* TODO: If we have buffers enabled, it might be worthwile to add a pointer
 * to the FILE in the cookie and have read, write, and seek operate directly
 * on the buffer itself (ie replace the FILE buffer with the cookie buffer
 * and update FILE bufstart, etc. whenever we seek). */

FILE *fmemopen(void *s, size_t len, const char *modes)
{
	FILE *fp;
	__fmo_cookie *cookie;
	size_t i;

	if ((cookie = malloc(sizeof(__fmo_cookie))) != NULL) {
		cookie->len = len;
		cookie->eof = cookie->pos = 0; /* pos and eof adjusted below. */
		cookie->dynbuf = 0;
		if (((cookie->buf = s) == NULL) && (len > 0)) {
			if ((cookie->buf = malloc(len)) == NULL) {
				goto EXIT_cookie;
			}
			cookie->dynbuf = 1;
			*cookie->buf = 0;	/* If we're appending, treat as empty file. */
		}
		
#ifndef __BCC__
		fp = fopencookie(cookie, modes, _fmo_io_funcs);
#else
		fp = fopencookie(cookie, modes, &_fmo_io_funcs);
#endif
		/* Note: We don't need to worry about locking fp in the thread case
		 * as the only possible access would be a close or flush with
		 * nothing currently in the FILE's write buffer. */

		if (fp != NULL) {
			cookie->fp = fp;
			if ((fp->modeflags & __FLAG_APPEND) && (len > 0)) {
				for (i = 0 ; i < len ; i++) {
					if (cookie->buf[i] == 0) {
						break;
					}
				}
				cookie->eof = cookie->pos = i; /* Adjust eof and pos. */
			}
			return fp;
		}
	}

	if (!s) {
		free(cookie->buf);
	}
 EXIT_cookie:
	free(cookie);

	return NULL;
}

#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
#endif
/**********************************************************************/
#ifdef L_open_memstream
#ifdef __STDIO_GLIBC_CUSTOM_STREAMS

#define COOKIE ((__oms_cookie *) cookie)

typedef struct {
	char *buf;
	size_t len;
	size_t pos;
	size_t eof;
	char **bufloc;
	size_t *sizeloc;
} __oms_cookie;

/* Nothing to do here, as memstreams are write-only. */
/*  static ssize_t oms_read(void *cookie, char *buf, size_t bufsize) */
/*  { */
/*  } */

static ssize_t oms_write(void *cookie, const char *buf, size_t bufsize)
{
	char *newbuf;
	size_t count;

	/* Note: we already know bufsize < SSIZE_MAX... */

	count = COOKIE->len - COOKIE->pos - 1;
	assert(COOKIE->pos < COOKIE->len); /* Always nul-terminate! */

	if (bufsize > count) {
		newbuf = realloc(COOKIE->buf, COOKIE->len + bufsize - count);
		if (newbuf) {
			*COOKIE->bufloc = COOKIE->buf = newbuf;
			COOKIE->len += (bufsize - count);
		} else {
			bufsize = count;
			if (count == 0) {
				errno = EFBIG;	/* TODO: check glibc errno setting... */
				return -1;
			}
		}
	}

	memcpy(COOKIE->buf + COOKIE->pos, buf, bufsize);
	COOKIE->pos += bufsize;

	if (COOKIE->pos > COOKIE->eof) {
		*COOKIE->sizeloc = COOKIE->eof = COOKIE->pos;
	}

	return bufsize;
}

static int oms_seek(void *cookie, __offmax_t *pos, int whence)
{
	__offmax_t p = *pos;
	char *buf;
	size_t leastlen;

	/* Note: fseek already checks that whence is legal, so don't check here
	 * unless debugging. */
	assert(((unsigned int) whence) <= 2);

	if (whence != SEEK_SET) {
		p += (whence == SEEK_CUR) ? COOKIE->pos : /* SEEK_END */ COOKIE->eof;
	}

	/* Note: glibc only allows seeking in the buffer.  We'll actually restrict
	 * to the data. */
	/* Check for offset < 0, offset >= too big (need nul), or overflow... */
	if (((uintmax_t) p) >= SIZE_MAX - 1) {
		return -1;
	}

	leastlen = ((size_t) p) + 1; /* New pos + 1 for nul if necessary. */

	if (leastlen >= COOKIE->len) { /* Need to grow buffer... */
		buf = realloc(COOKIE->buf, leastlen);
		if (buf) {
			*COOKIE->bufloc = COOKIE->buf = buf;
			COOKIE->len = leastlen;
			memset(buf + COOKIE->eof, leastlen - COOKIE->eof, 0); /* 0-fill */
		} else {
			/* TODO: check glibc errno setting... */
			return -1;
		}
	}

	*pos = COOKIE->pos = --leastlen;

	if (leastlen > COOKIE->eof) {
		memset(COOKIE->buf + COOKIE->eof, leastlen - COOKIE->eof, 0);
		*COOKIE->sizeloc = COOKIE->eof;
	}

	return 0;
}

static int oms_close(void *cookie)
{
	free(cookie);
	return 0;
}

#undef COOKIE

static const cookie_io_functions_t _oms_io_funcs = {
	NULL, oms_write, oms_seek, oms_close
};

/* TODO: If we have buffers enabled, it might be worthwile to add a pointer
 * to the FILE in the cookie and operate directly on the buffer itself
 * (ie replace the FILE buffer with the cookie buffer and update FILE bufstart,
 * etc. whenever we seek). */

FILE *open_memstream(char **__restrict bufloc, size_t *__restrict sizeloc)
{
	__oms_cookie *cookie;
	FILE *fp;

	if ((cookie = malloc(sizeof(__oms_cookie))) != NULL) {
		if ((cookie->buf = malloc(cookie->len = BUFSIZ)) == NULL) {
			goto EXIT_cookie;
		}
		*cookie->buf = 0;		/* Set nul terminator for buffer. */
		*(cookie->bufloc = bufloc) = cookie->buf;
		*(cookie->sizeloc = sizeloc) = cookie->eof = cookie->pos = 0;
		
#ifndef __BCC__
		fp = fopencookie(cookie, "w", _oms_io_funcs);
#else
		fp = fopencookie(cookie, "w", &_oms_io_funcs);
#endif
		/* Note: We don't need to worry about locking fp in the thread case
		 * as the only possible access would be a close or flush with
		 * nothing currently in the FILE's write buffer. */

		if (fp != NULL) {
			return fp;
		}
	}

	if (cookie->buf != NULL) {
		free(cookie->buf);
	}
 EXIT_cookie:
	free(cookie);

	return NULL;
}

#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
#endif
/**********************************************************************/
#ifdef L_fopencookie
#ifdef __STDIO_GLIBC_CUSTOM_STREAMS

/* NOTE: GLIBC difference!!! -- fopencookie
 * According to the info pages, glibc allows seeking within buffers even if
 * no seek function is supplied.  We don't. */

/* NOTE: GLIBC difference!!! -- fopencookie
 * When compiled without large file support, the offset pointer for the
 * cookie_seek function is off_t * and not off64_t * as for glibc. */

/* TODO: rewrite _stdio_fopen() to avoid the fopencookie() kludge. */

/* Currently no real reentrancy issues other than a possible double close(). */

#ifndef __BCC__

FILE *fopencookie (void * __restrict cookie, const char * __restrict mode,
					cookie_io_functions_t io_functions)
{
	FILE *stream;
	int fd;

	if ((stream = _stdio_fopen("/dev/null", mode, NULL, -1)) != NULL) {
		fd = stream->filedes;
		stream->filedes = -1;
		close(fd);
		stream->gcs = io_functions;
		stream->cookie = cookie;
	}

#if !defined(__STDIO_BUFFERS) && !defined(__STDIO_THREADSAFE)
	/* I we don't have buffers or threads, we only need to worry about
	 * custom streams on the open list, as no flushing is necessary and
	 * no locking of possible underlying normal streams need be done.
	 * We do need to explicitly close custom streams on termination of stdio,
	 * and we need to lock the list as it can be modified by fclose(). */
	__STDIO_THREADLOCK_OPENLIST;
	stream->nextopen = _stdio_openlist;	/* New files are inserted at */
	_stdio_openlist = stream;			/*   the head of the list. */
	__STDIO_THREADUNLOCK_OPENLIST;
#endif /* !defined(__STDIO_BUFFERS) && !defined(__STDIO_THREADSAFE) */

	return stream;
}

#else  /* __BCC__ */

/* NOTE: GLIBC difference!!! -- fopencookie (bcc only)
 * Since bcc doesn't support passing of structs, we define fopencookie as a
 * macro in terms of _fopencookie which takes a struct * for the io functions
 * instead.
 */

FILE *_fopencookie (void * __restrict cookie, const char * __restrict mode,
					cookie_io_functions_t *io_functions)
{
	FILE *stream;

	if ((stream = _stdio_fopen("/dev/null", mode, NULL, -1)) != NULL) {
		int fd = stream->filedes;
		stream->filedes = -1;
		close(fd);
		stream->gcs.read  = io_functions->read;
		stream->gcs.write = io_functions->write;
		stream->gcs.seek  = io_functions->seek;
		stream->gcs.close = io_functions->close;
		stream->cookie = cookie;
	}

#if !defined(__STDIO_BUFFERS) && !defined(__STDIO_THREADSAFE)
	/* I we don't have buffers or threads, we only need to worry about
	 * custom streams on the open list, as no flushing is necessary and
	 * no locking of possible underlying normal streams need be done.
	 * We do need to explicitly close custom streams on termination of stdio,
	 * and we need to lock the list as it can be modified by fclose(). */
	__STDIO_THREADLOCK_OPENLIST;
	stream->nextopen = _stdio_openlist;	/* New files are inserted at */
	_stdio_openlist = stream;			/*   the head of the list. */
	__STDIO_THREADUNLOCK_OPENLIST;
#endif /* !defined(__STDIO_BUFFERS) && !defined(__STDIO_THREADSAFE) */

	return stream;
}

#endif  /* __BCC__ */

#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
#endif
/**********************************************************************/
#ifdef L___fbufsize

/* Not reentrant. */

size_t __fbufsize(register FILE * __restrict stream)
{
#ifdef __STDIO_BUFFERS
	return (stream->modeflags & __FLAG_NBF)
		? 0 : (stream->bufend - stream->bufstart);
#else  /* __STDIO_BUFFERS */
	return 0;
#endif /* __STDIO_BUFFERS */
}

#endif
/**********************************************************************/
#ifdef L___freading

/* No reentrancy issues. */

int __freading(FILE * __restrict stream)
{
	return stream->modeflags & (__FLAG_READING|__FLAG_READONLY);
}

#endif
/**********************************************************************/
#ifdef L___fwriting

/* No reentrancy issues. */

int __fwriting(FILE * __restrict stream)
{
	return stream->modeflags & (__FLAG_WRITING|__FLAG_WRITEONLY);
}

#endif
/**********************************************************************/
#ifdef L___freadable

/* No reentrancy issues. */

int __freadable(FILE * __restrict stream)
{
	return ~(stream->modeflags & __FLAG_WRITEONLY);
}

#endif
/**********************************************************************/
#ifdef L___fwritable

/* No reentrancy issues. */

int __fwritable(FILE * __restrict stream)
{
	return ~(stream->modeflags & __FLAG_READONLY);
}

#endif
/**********************************************************************/
#ifdef L___flbf

/* No reentrancy issues. */

int __flbf(FILE * __restrict stream)
{
#ifdef __STDIO_BUFFERS
	return (stream->modeflags & __FLAG_LBF);
#else  /* __STDIO_BUFFERS */
	/* TODO -- Even though there is no buffer, return flag setting? */
	return __FLAG_NBF;
#endif /* __STDIO_BUFFERS */
}

#endif
/**********************************************************************/
#ifdef L___fpurge

/* Not reentrant. */

void __fpurge(register FILE * __restrict stream)
{
#ifdef __STDIO_BUFFERS
#ifdef __STDIO_PUTC_MACRO
	stream->bufputc =			/* Must disable putc. */
#endif /* __STDIO_PUTC_MACRO */
#ifdef __STDIO_GETC_MACRO
	stream->bufgetc =			/* Must disable getc. */
#endif
	stream->bufwpos = stream->bufrpos = stream->bufstart; /* Reset pointers. */
#endif /* __STDIO_BUFFERS */
	/* Reset r/w flags and clear ungots. */
	stream->modeflags &= ~(__FLAG_READING|__FLAG_WRITING|__MASK_UNGOT);
}

#endif
/**********************************************************************/
#ifdef L___fpending

/* Not reentrant. */

#ifdef __STDIO_WIDE
#warning TODO  -- implement __fpending for wide streams! */
#else  /* __STDIO_WIDE */
size_t __fpending(register FILE * __restrict stream)
{
#ifdef __STDIO_BUFFERS
	/* TODO -- should we check this?  should we set errno?  just assert? */
	return (stream->modeflags & (__FLAG_READING|__FLAG_READONLY))
		? 0 : (stream->bufwpos - stream->bufstart);
#else  /* __STDIO_BUFFERS */
	return 0;
#endif /* __STDIO_BUFFERS */
}
#endif /* __STDIO_WIDE */

#endif
/**********************************************************************/
#ifdef L__flushlbf

/* No reentrancy issues. */

void _flushlbf(void)
{
#ifdef __STDIO_BUFFERS
	fflush((FILE *) &_stdio_openlist); /* Uses an implementation hack!!! */
#else  /* __STDIO_BUFFERS */
	/* Nothing to do. */
#endif /* __STDIO_BUFFERS */
}

#endif
/**********************************************************************/
#ifdef L___fsetlocking

/* No (serious) reentrancy issues -- return value could be incorrect. */
/* TODO -- fix race */

int __fsetlocking(FILE *stream, int locking_mode)
{
	int old_mode;

	assert((FSETLOCKING_QUERY == 0) && (FSETLOCKING_INTERNAL == 1)
		   && (FSETLOCKING_BYCALLER == 2));

	assert(((unsigned int) locking_mode) <= 2);

	/* Note: don't even bother locking here... */

	old_mode  = stream->user_locking;

	if (locking_mode != FSETLOCKING_QUERY) {
		/* In case we're not debugging, treat any unknown as a request to
		 * set internal locking, in order to match glibc behavior. */
		stream->user_locking = ((locking_mode == FSETLOCKING_BYCALLER)
								? FSETLOCKING_BYCALLER
								: FSETLOCKING_INTERNAL);
	}

	return old_mode;
}

#endif
/**********************************************************************/
#ifdef L_flockfile

void flockfile(FILE *stream)
{
	pthread_mutex_lock(&stream->lock);
}

#endif
/**********************************************************************/
#ifdef L_ftrylockfile

int ftrylockfile(FILE *stream)
{
	return pthread_mutex_trylock(&stream->lock);
}

#endif
/**********************************************************************/
#ifdef L_funlockfile

void funlockfile(FILE *stream)
{
	pthread_mutex_unlock(&stream->lock);
}

#endif
/**********************************************************************/
/* my extension functions */
/**********************************************************************/
#ifdef L__stdio_fsfopen
/*
 * Stack|Static File open -- open a file where the FILE is either
 * stack or staticly allocated.
 */

/* No reentrancy issues. */

FILE *_stdio_fsfopen(const char * __restrict filename,
					 const char * __restrict mode,
					 register FILE * __restrict stream)
{
#ifdef __STDIO_BUFFERS
	stream->modeflags = __FLAG_FBF;
#if __STDIO_BUILTIN_BUF_SIZE > 0
	stream->bufstart = stream->builtinbuf;
	stream->bufend = stream->builtinbuf + sizeof(stream->builtinbuf);
#else  /* __STDIO_BUILTIN_BUF_SIZE > 0 */
	stream->bufend = stream->bufstart = NULL;
#endif /* __STDIO_BUILTIN_BUF_SIZE > 0 */
#endif /* __STDIO_BUFFERS */

	return _stdio_fopen(filename, mode, stream, -1);
}
#endif
/**********************************************************************/
/* stdio internal functions */
/**********************************************************************/
#ifdef L__stdio_adjpos
/*
 * ANSI/ISO p. 370: The file positioning indicator is unspecified after
 * a successful call to ungetwc.
 * Note however, that this applies only to _user_ calls to ungetwc.  We
 * need to allow for internal calls by scanf.  So we store the byte count
 * of the first ungot wide char in ungot0_bytes.  If it is 0 (user case)
 * then the file position is treated as unknown.
 */


/* Internal function -- not reentrant. */

int _stdio_adjpos(register FILE * __restrict stream,
					register __offmax_t *pos)
{
	__offmax_t r;
	int cor = stream->modeflags & __MASK_UNGOT;	/* handle ungots */

#ifdef __STDIO_WIDE
	/* Assumed narrow stream so correct if wide. */
	if (cor && (stream->modeflags & __FLAG_WIDE)) {
		cor = cor - 1 + stream->ungot_width[0];
		if ((stream->ungot_width[0] == 0) /* don't know byte count or */
			|| ((stream->modeflags & __MASK_UNGOT) > 1)) { /* app case */
			return -1;
		}
	}
#endif /* __STDIO_WIDE */
#ifdef __STDIO_BUFFERS
	if (stream->modeflags & __FLAG_WRITING) {
		cor -= (stream->bufwpos - stream->bufstart); /* pending writes */
	}
	if (stream->modeflags & __FLAG_READING) {
		cor += (stream->bufwpos - stream->bufrpos); /* extra's read */
	}
#endif /* __STDIO_BUFFERS */

	r = *pos;
	return ((*pos -= cor) > r) ? -cor : cor;
}

#endif
/**********************************************************************/
#ifdef L__stdio_lseek
/*
 * This function is only called by fseek and ftell.
 * fseek -- doesn't care about pos val, just success or failure.
 * ftell -- needs pos val but offset == 0 and whence == SET_CUR.
 */

/* Internal function -- not reentrant. */

int _stdio_lseek(FILE *stream, __offmax_t *pos, int whence)
{
	__offmax_t res;

#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
	if (stream->cookie != &stream->filedes) {
		return (((stream->gcs.seek == NULL)
				 || ((stream->gcs.seek)(stream->cookie, pos, whence) < 0))
				? -1 : 0);
	}
#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
#ifdef __STDIO_LARGE_FILES
	res = lseek64(stream->filedes, *pos, whence);
#else
	res = lseek(stream->filedes, *pos, whence);
#endif /* __STDIO_LARGE_FILES */
	return (res >= 0) ? ((*pos = res), 0) : -1;
}

#endif
/**********************************************************************/
#ifdef L__stdio_fread
/*
 * NOTE!!! This routine is meant to be callable by both narrow and wide
 * functions.  However, if called by a wide function, there must be
 * NO pending ungetwc()s!!!
 */

/* Unlike write, it's ok for read to return fewer than bufsize, since
 * we may not need all of them. */
static ssize_t _stdio_READ(FILE *stream, void *buf, size_t bufsize)
{
	ssize_t rv;

	if (bufsize == 0) {
		return 0;
	}

	if (bufsize > SSIZE_MAX) {
		bufsize = SSIZE_MAX;
	}

#ifdef __BCC__
 TRY_READ:
#endif
	rv = __READ(stream, buf, bufsize);
	if (rv > 0) {
#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
		assert(rv <= bufsize);	/* buggy user handler... TODO: check? */
		if (rv > bufsize) {	/* Num reported written > number requested */
			rv = bufsize;		/* Treat as a full read??? */
		}
#endif
	} else if (rv == 0) {
		stream->modeflags |= __FLAG_EOF;
	} else {
#ifdef __BCC__
		if (errno == EINTR) {
			goto TRY_READ;
		}
#endif
		stream->modeflags |= __FLAG_ERROR;
		rv = 0;
	}

	return rv;
}

/* Internal function -- not reentrant. */

size_t _stdio_fread(unsigned char *buffer, size_t bytes,
					  register FILE *stream)
{
	__stdio_validate_FILE(stream); /* debugging only */

#ifdef __STDIO_BUFFERS

	if (stream->modeflags 
#ifdef __STDIO_AUTO_RW_TRANSITION
		& (__FLAG_WRITEONLY)
#else  /* __STDIO_AUTO_RW_TRANSITION */
		/* ANSI/ISO and SUSv3 require not currently writing. */
		& (__FLAG_WRITEONLY|__FLAG_WRITING)
#endif /* __STDIO_AUTO_RW_TRANSITION */
		) {
#ifdef __STDIO_PUTC_MACRO
		stream->bufputc = stream->bufstart;	/* Must disable putc. */
#endif /* __STDIO_PUTC_MACRO */
		stream->modeflags |= __FLAG_ERROR;
		/* TODO: This is for posix behavior if writeonly.  To save space, we
		 * use this errno for read attempt while writing, as no errno is
		 * specified by posix for this case, even though the restriction is
		 * mentioned in fopen(). */
		errno = EBADF;
		return 0;
	}

	/* We need to disable putc and getc macros in case of error */
#if defined(__STDIO_PUTC_MACRO) || defined(__STDIO_GETC_MACRO)
#ifdef __STDIO_PUTC_MACRO
	stream->bufputc =
#endif /* __STDIO_GETC_MACRO */
#ifdef __STDIO_GETC_MACRO
	stream->bufgetc =
#endif /* __STDIO_GETC_MACRO */
	stream->bufstart;
#endif /*  defined(__STDIO_PUTC_MACRO) || defined(__STDIO_GETC_MACRO) */

	if (stream->modeflags & __MASK_BUFMODE) {
		/* If the stream is readable and not fully buffered, we must first
		 * flush all line buffered output streams.  Do this before the
		 * error check as this may be a read/write line-buffered stream. */
		fflush((FILE *) &_stdio_openlist); /* Uses an implementation hack!!! */
	}

#ifdef __STDIO_AUTO_RW_TRANSITION
	if (stream->modeflags & __FLAG_WRITING) {
		/* TODO -- return if error?  Test glibc behavior with a custom r/w. */
		fflush(stream);
	}
#endif /* __STDIO_AUTO_RW_TRANSITION */

	stream->modeflags |= __FLAG_READING; /* Make sure Reading flag is set. */

	{
		register unsigned char *p = (unsigned char *) buffer;

		/* First, grab appropriate ungetc() chars.  NOT FOR WIDE ORIENTATED! */
		while (bytes && (stream->modeflags & __MASK_UNGOT)) {
#ifdef __STDIO_WIDE
			assert(stream->modeflags & __FLAG_NARROW);
#endif /* __STDIO_WIDE */
			*p++ = stream->ungot[(--stream->modeflags) & __MASK_UNGOT];
			stream->ungot[1] = 0;
			--bytes;
		}

		/* Now get any other needed chars from the buffer or the file. */
	FROM_BUF:
		while (bytes && (stream->bufrpos < stream->bufwpos)) {
			--bytes;
			*p++ = *stream->bufrpos++;
		}

		if (bytes > 0) {
			ssize_t len;

			/* The buffer is exhausted, but we still need chars.  */
			stream->bufrpos = stream->bufwpos = stream->bufstart;

			if (bytes <= stream->bufend - stream->bufwpos) {
				/* We have sufficient space in the buffer. */
				len = _stdio_READ(stream, stream->bufwpos,
								  stream->bufend - stream->bufwpos);
				if (len > 0) {
					stream->bufwpos += len;
					goto FROM_BUF;
				}
			} else {
				/* More bytes needed than fit in the buffer, so read */
				/* directly into caller's buffer. */
				len = _stdio_READ(stream, p, bytes);
				if (len > 0) {
					p += len;
					bytes -= len;
					goto FROM_BUF; /* Redundant work, but stops extra read. */
				}
			}
		}

#ifdef __STDIO_GETC_MACRO
		if (!(stream->modeflags & (__FLAG_WIDE|__MASK_UNGOT|__MASK_BUFMODE))) {
			stream->bufgetc = stream->bufwpos; /* Enable getc macro. */
		}
#endif

		__stdio_validate_FILE(stream); /* debugging only */
		return (p - (unsigned char *)buffer);
	}

#else  /* __STDIO_BUFFERS --------------------------------------- */

	if (stream->modeflags 
#ifdef __STDIO_AUTO_RW_TRANSITION
		& (__FLAG_WRITEONLY)
#else  /* __STDIO_AUTO_RW_TRANSITION */
		/* ANSI/ISO and SUSv3 require not currently writing. */
		& (__FLAG_WRITEONLY|__FLAG_WRITING)
#endif /* __STDIO_AUTO_RW_TRANSITION */
		) {
		stream->modeflags |= __FLAG_ERROR;
		/* TODO: This is for posix behavior if writeonly.  To save space, we
		 * use this errno for read attempt while writing, as no errno is
		 * specified by posix for this case, even though the restriction is
		 * mentioned in fopen(). */
		errno = EBADF;
		return 0;
	}

#ifdef __STDIO_AUTO_RW_TRANSITION
	stream->modeflags &= ~(__FLAG_WRITING);	/* Make sure Writing flag clear. */
#endif /* __STDIO_AUTO_RW_TRANSITION */

	stream->modeflags |= __FLAG_READING; /* Make sure Reading flag is set. */

	{
		register unsigned char *p = (unsigned char *) buffer;

		/* First, grab appropriate ungetc() chars.  NOT FOR WIDE ORIENTATED! */
		while (bytes && (stream->modeflags & __MASK_UNGOT)) {
#ifdef __STDIO_WIDE
			assert(stream->modeflags & __FLAG_NARROW);
#endif /* __STDIO_WIDE */
			*p++ = stream->ungot[(--stream->modeflags) & __MASK_UNGOT];
			stream->ungot[1] = 0;
			--bytes;
		}	

		while (bytes > 0) {
			ssize_t len = _stdio_READ(stream, p, (unsigned) bytes);
			if (len == 0) {
				break;
			}
			p += len;
			bytes -= len;
		}

		__stdio_validate_FILE(stream); /* debugging only */
		return (p - (unsigned char *)buffer);
	}

#endif /* __STDIO_BUFFERS */
}

#endif
/**********************************************************************/
#ifdef L__stdio_fwrite
/*
 * If buffer == NULL, attempt to fflush and return number of chars
 * remaining in buffer (0 if successful fflush).
 */

/* WARNING!!!! Current standards say that termination due to an asyncronous
 * signal may not result in stdio streams being flushed.  This libary makes
 * an effort to do so but there is no way, short of blocking signals for
 * each _stdio_fwrite call, that we can maintain the correct state if a
 * signal is recieved mid-call.  So any stream in mid-_stdio_fwrite could
 * not some flush data or even duplicate-flush some data.  It is possible
 * to avoid the duplicate-flush case by setting/clearing the stream
 * error flag before/after the write process, but it doesn't seem worth
 * the trouble. */

/* Like standard write, but always does a full write unless error plus
 *deals correctly with bufsize > SSIZE_MAX... not much on an issue on linux
 * but definitly could be on Elks.  Also on Elks, always loops for EINTR..
 * Returns number of bytes written, so a short write indicates an error */
static size_t _stdio_WRITE(FILE *stream, const void *buf, size_t bufsize)
{
	size_t todo;
	ssize_t rv, stodo;

	todo = bufsize;

	while (todo) {
		stodo = (todo <= SSIZE_MAX) ? todo : SSIZE_MAX;
		rv = __WRITE(stream, buf, stodo);
		if (rv >= 0) {
#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
			assert(rv <= stodo);	/* buggy user handler... TODO: check? */
			if (rv > stodo) {	/* Num reported written > number requested */
				rv = stodo;		/* Treat as a full write??? */
			}
#endif
			todo -= rv;
			buf += rv;
		} else
#ifdef __BCC__
			if (errno != EINTR)
#endif
		{
			stream->modeflags |= __FLAG_ERROR;
			break;
		}
	}

	return bufsize - todo;
}

/* Internal function -- not reentrant. */

size_t _stdio_fwrite(const unsigned char *buffer, size_t bytes,
					   register FILE *stream)
{
#ifdef __STDIO_BUFFERS
	register const unsigned char *p;

	__stdio_validate_FILE(stream); /* debugging only */

	if ((stream->modeflags & __FLAG_READONLY)
#ifndef __STDIO_AUTO_RW_TRANSITION
	/* ANSI/ISO requires either at EOF or currently not reading. */
		|| ((stream->modeflags & (__FLAG_READING|__FLAG_EOF))
			== __FLAG_READING)
#endif /* __STDIO_AUTO_RW_TRANSITION */
		) {
		stream->modeflags |= __FLAG_ERROR;
		/* TODO: This is for posix behavior if readonly.  To save space, we
		 * use this errno for write attempt while reading, as no errno is
		 * specified by posix for this case, even though the restriction is
		 * mentioned in fopen(). */
		errno = EBADF;
		return 0;
	}

#ifdef __STDIO_AUTO_RW_TRANSITION
	/* If we were reading, deal with ungots and buffered chars. */
	if ((stream->modeflags & (__FLAG_EOF|__FLAG_WRITING|__FLAG_WRITEONLY))
		== 0) {
		/* If appending, we might as well seek to end to save a seek. */
		fseek(stream, 0L, 
			  ((stream->modeflags & __FLAG_APPEND) ? SEEK_END : SEEK_CUR));
		/* TODO: set EOF in fseek when appropriate? */
	}
#endif

	/* We need to disable putc and getc macros in case of error */
#if defined(__STDIO_AUTO_RW_TRANSITION) \
	|| defined(__STDIO_PUTC_MACRO) || defined(__STDIO_GETC_MACRO)
#ifdef __STDIO_AUTO_RW_TRANSITION
	stream->bufrpos =			/* TODO -- necessary? */
#endif /* __STDIO_AUTO_RW_TRANSITION */
#ifdef __STDIO_PUTC_MACRO
	stream->bufputc =
#endif /* __STDIO_GETC_MACRO */
#ifdef __STDIO_GETC_MACRO
	stream->bufgetc =
#endif /* __STDIO_GETC_MACRO */
	stream->bufstart;
#endif /* not using ansi restrictions ; or using putc and/or getc macro */

	/* Clear both reading and writing flags.  We need to clear the writing
	 * flag in case we're fflush()ing or in case of an error. */
	stream->modeflags &= ~(__FLAG_READING|__FLAG_WRITING);

	{
		const unsigned char *buf0 = buffer;

		if (!buffer) {				/* fflush the stream */
		FFLUSH:
			{
				size_t count = stream->bufwpos - stream->bufstart;
				p = stream->bufstart;

				if (stream->filedes == -2) { /* TODO -- document this hack! */
					stream->modeflags |= __FLAG_WRITING;
					return (!buffer) ? 0 : ((buffer - buf0) + bytes);
				}

				{
					size_t rv = _stdio_WRITE(stream, p, count);
					p += rv;
					count -= rv;
				}
			
				stream->bufwpos = stream->bufstart;
				while (count) {
					*stream->bufwpos++ = *p++;
					--count;
				}

				if (!buffer) {	/* fflush case... */
					__stdio_validate_FILE(stream); /* debugging only */
					return stream->bufwpos - stream->bufstart;
				}
			}
		}

#if 1
		/* TODO: If the stream is buffered, we may be able to omit. */
		if ((stream->bufwpos == stream->bufstart) /* buf empty */
			&& (stream->bufend - stream->bufstart <= bytes)	/* fills */
			&& (stream->filedes != -2)) { /* not strinf fake file */
			/* so want to do a direct write of supplied buffer */
			{
				size_t rv = _stdio_WRITE(stream, buffer, bytes);
				buffer += rv;
				bytes -= rv;
			}
		} else
#endif
		/* otherwise buffer not empty and/or data fits */
		{
			size_t count = stream->bufend - stream->bufwpos;
			p = buffer;

			if (count > bytes) {
				count = bytes;
			}
			bytes -= count;

			while (count) {
				*stream->bufwpos++ = *buffer++;
				--count;
			}

			if (bytes) {
				goto FFLUSH;
			}

			if (stream->modeflags & __FLAG_LBF) {
				while (p < buffer) { /* check for newline. */
					if (*p++ == '\n') {
						goto FFLUSH;
					}
				}
			}
		}

#ifdef __STDIO_PUTC_MACRO
		if (!(stream->modeflags & (__FLAG_WIDE|__MASK_BUFMODE))) {
			/* Not wide, no errors and fully buffered, so enable putc macro. */
			stream->bufputc = stream->bufend;
		}
#endif /* __STDIO_GETC_MACRO */
		stream->modeflags |= __FLAG_WRITING; /* Ensure Writing flag is set. */

		__stdio_validate_FILE(stream); /* debugging only */
		return buffer - buf0;

	}

#else  /* __STDIO_BUFFERS --------------------------------------- */

	__stdio_validate_FILE(stream); /* debugging only */

	if ((stream->modeflags & __FLAG_READONLY)
#ifndef __STDIO_AUTO_RW_TRANSITION
	/* ANSI/ISO requires either at EOF or currently not reading. */
		|| ((stream->modeflags & (__FLAG_READING|__FLAG_EOF))
			== __FLAG_READING)
#endif /* __STDIO_AUTO_RW_TRANSITION */
		) {
		stream->modeflags |= __FLAG_ERROR;
		/* TODO: This is for posix behavior if readonly.  To save space, we
		 * use this errno for write attempt while reading, as no errno is
		 * specified by posix for this case, even though the restriction is
		 * mentioned in fopen(). */
		errno = EBADF;
		return 0;
	}

	/* We always clear the reading flag in case at EOF. */
	stream->modeflags &= ~(__FLAG_READING);
	/* Unlike the buffered case, we set the writing flag now since we don't
	 * need to do anything here for fflush(). */
	stream->modeflags |= __FLAG_WRITING;

	{
		register unsigned char *p = (unsigned char *) buffer;

		ssize_t rv = _stdio_WRITE(stream, p, bytes);

		p += rv;
		bytes -= rv;

		__stdio_validate_FILE(stream); /* debugging only */
		return (p - (unsigned char *)buffer);
	}

#endif /* __STDIO_BUFFERS *****************************************/
}

#endif
/**********************************************************************/
#ifdef L__stdio_init

/* Internal functions -- _stdio_init() and __stdio_validate_FILE
 * are not reentrant, but _stdio_term() is through fflush().
 * Also, the _cs_{read|write|close} functions are not reentrant. */

#ifndef NDEBUG
void __stdio_validate_FILE(FILE *stream)
{
	if (stream->filedes == -2) { /* fake FILE for sprintf, scanf, etc. */
		return;
	}

	__STDIO_THREADLOCK(stream);

#ifdef __STDIO_BUFFERS
	assert(stream->bufstart <= stream->bufrpos);
	assert(stream->bufrpos <= stream->bufwpos);
	assert(stream->bufwpos <= stream->bufend);
	assert(stream->bufwpos <= stream->bufend);
	if ((stream->modeflags & __MASK_BUFMODE) == __FLAG_NBF) {
		assert(stream->bufstart == stream->bufend);
	}
	assert((stream->modeflags & __MASK_BUFMODE) <= __FLAG_NBF);
#endif
#ifdef __STDIO_PUTC_MACRO
	assert(stream->bufstart <= stream->bufputc);
	assert(stream->bufputc <= stream->bufend);
	if (stream->bufstart < stream->bufputc) {
		assert(stream->bufputc == stream->bufend);
		assert(stream->modeflags & (__FLAG_WRITING));
		assert(!(stream->modeflags
				 & (__FLAG_WIDE|__MASK_BUFMODE|__MASK_UNGOT|__FLAG_READONLY))
			   );
	}
#endif
#ifdef __STDIO_GETC_MACRO
	assert(stream->bufstart <= stream->bufgetc);
	assert(stream->bufgetc <= stream->bufwpos);
	if (stream->bufstart < stream->bufgetc) {
		assert(stream->modeflags & (__FLAG_READING));
		assert(!(stream->modeflags
				 & (__FLAG_WIDE|__MASK_BUFMODE|__MASK_UNGOT|__FLAG_WRITEONLY))
			   );
	}
#endif
	assert((stream->modeflags & __MASK_UNGOT) != __MASK_UNGOT);
	if (stream->modeflags & __MASK_UNGOT1) {
		assert(stream->ungot[1] <= 1);
	}
	if (stream->modeflags & __MASK_UNGOT) {
		assert(!(stream->modeflags & __FLAG_EOF));
	}
	assert((stream->modeflags & (__FLAG_READONLY|__FLAG_WRITEONLY))
		   != (__FLAG_READONLY|__FLAG_WRITEONLY));

	/* TODO -- filepos?  ungot_width?  filedes?  nextopen? */

	__STDIO_THREADUNLOCK(stream);
}
#endif

#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
ssize_t _cs_read(void *cookie, char *buf, size_t bufsize)
{
	return read(*((int *) cookie), buf, bufsize);
}

ssize_t _cs_write(void *cookie, const char *buf, size_t bufsize)
{
	return write(*((int *) cookie), (char *) buf, bufsize);
}

int _cs_close(void *cookie)
{
	return close(*((int *) cookie));
}
#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */

#ifdef __STDIO_BUFFERS
static unsigned char _fixed_buffers[2 * BUFSIZ];
#define bufin (_fixed_buffers)
#define bufout (_fixed_buffers + BUFSIZ)
#endif /* __STDIO_BUFFERS */

static FILE _stdio_streams[] = {
	__STDIO_INIT_FILE_STRUCT(_stdio_streams[0], __FLAG_LBF|__FLAG_READONLY, \
							 0, _stdio_streams + 1, bufin, BUFSIZ ),
	__STDIO_INIT_FILE_STRUCT(_stdio_streams[1], __FLAG_LBF|__FLAG_WRITEONLY, \
							 1, _stdio_streams + 2, bufout, BUFSIZ ), 
	__STDIO_INIT_FILE_STRUCT(_stdio_streams[2], __FLAG_NBF|__FLAG_WRITEONLY, \
							 2, 0, 0, 0 )
};

FILE *_stdin = _stdio_streams + 0;
FILE *_stdout = _stdio_streams + 1;
FILE *_stderr = _stdio_streams + 2;

#if defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS)

#ifdef __STDIO_BUFFERS
FILE *_stdio_openlist = _stdio_streams;
#else  /* __STDIO_BUFFERS */
FILE *_stdio_openlist = NULL;
#endif /* __STDIO_BUFFERS */

#ifdef __STDIO_THREADSAFE
pthread_mutex_t _stdio_openlist_lock = PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;


void __stdio_init_mutex(pthread_mutex_t *m)
{
	static const pthread_mutex_t __stdio_mutex_initializer
		= PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;

	memcpy(m, &__stdio_mutex_initializer, sizeof(__stdio_mutex_initializer));
}
#endif /* __STDIO_THREADSAFE */

/* TODO - do we need to lock things, or do we just assume we're the only
 * remaining thread? */

/* Note: We assume here that we are the only remaining thread. */
void _stdio_term(void)
{
#if defined(__STDIO_GLIBC_CUSTOM_STREAMS) || defined(__STDIO_THREADSAFE)
	FILE *ptr;
#endif

	/* TODO: if called via a signal handler for a signal mid _stdio_fwrite,
	 * the stream may be in an unstable state... what do we do?
	 * perhaps set error flag before and clear when done if successful? */

#ifdef __STDIO_THREADSAFE
	/* First, forceably unlock the open file list and all files.
	 * Note: Set locking mode to "by caller" to save some overhead later. */
	__stdio_init_mutex(&_stdio_openlist_lock);
	for (ptr = _stdio_openlist ; ptr ; ptr = ptr->nextopen ) {
		ptr->user_locking = FSETLOCKING_BYCALLER;
		__stdio_init_mutex(&ptr->lock);
	}
#endif /* __STDIO_THREADSAFE */

#ifdef __STDIO_BUFFERS
	/* TODO -- set an alarm and flush each file "by hand"? to avoid blocking? */

	/* Now flush all streams. */
	fflush(NULL);
#endif /* __STDIO_BUFFERS */

	/* Next close all custom streams in case of any special cleanup, but
	 * don't use fclose() because that pulls in free and malloc.  Also,
	 * don't worry about removing them from the list.  Just set the cookie
	 * pointer to NULL so that an error will be generated if someone tries
	 * to use the stream. */
#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
	for (ptr = _stdio_openlist ; ptr ; ptr = ptr->nextopen ) {
		if (ptr->cookie != &ptr->filedes) {	/* custom stream */
			__CLOSE(ptr);
			ptr->cookie = NULL;	/* Generate an error if used later. */
#if 0
/*  #ifdef __STDIO_BUFFERS */
		} else {
			/* TODO: "unbuffer" files like glibc does?  Inconsistent with
			 * custom stream handling above, but that's necessary to deal
			 * with special user-defined close behavior. */
			stream->bufwpos = stream->bufrpos = stream->bufend
#ifdef __STDIO_GETC_MACRO
				= stream->bufgetc
#endif
#ifdef __STDIO_PUTC_MACRO
				= stream->bufputc
#endif
				= stream->bufstart;
#endif /* __STDIO_BUFFERS */
		}
	}
#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */
}


#if defined(__STDIO_BUFFERS) || !defined(__UCLIBC__)
void _stdio_init(void)
{
#ifdef __STDIO_BUFFERS
	/* stdin and stdout uses line buffering when connected to a tty. */
	_stdio_streams[0].modeflags ^= isatty(0) * __FLAG_LBF;
	_stdio_streams[1].modeflags ^= isatty(1) * __FLAG_LBF;
#endif /* __STDIO_BUFFERS */
#ifndef __UCLIBC__
/* __stdio_term is automatically when exiting if stdio is used.
 * See misc/internals/__uClibc_main.c and and stdlib/atexit.c. */
	atexit(_stdio_term);
#endif /* __UCLIBC__ */
}
#endif /* defined(__STDIO_BUFFERS) || !defined(__UCLIBC__) */
#endif /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */

#endif
/**********************************************************************/
/* ANSI/ISO functions. */
/**********************************************************************/
#ifdef L_remove
#include <unistd.h>
#include <errno.h>

/* No reentrancy issues. */

int remove(register const char *filename)
{
	int old_errno = errno;

	/* SUSv3 says equivalent to rmdir() if a directory, and unlink()
	 * otherwise.  Hence, we need to try rmdir() first. */

	return (((rmdir(filename) == 0)
			 || ((errno == ENOTDIR)
				 && ((__set_errno(old_errno), unlink(filename)) == 0)))
			? 0 : -1);
}
#endif
/**********************************************************************/
/* rename is a syscall
#ifdef L_rename
int rename(const char *old, const char *new);
#endif
*/
/**********************************************************************/
/* TODO: tmpfile */
/*  #ifdef L_tmpfile */
/*  FILE *tmpfile(void); */
/*  #endif */
/**********************************************************************/
/* TODO: tmpname */
/*  #ifdef L_tmpname */
/*  char *tmpname(char *s); */
/*  #endif */
/**********************************************************************/
#ifdef L_fclose

/* We need to be careful here to avoid deadlock when threading, as we
 * need to lock both the file and the open file list.  This can clash
 * with fflush.  Since fflush is much more common, we do the extra
 * work here. */

int fclose(register FILE *stream)
{
#if defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS)

	register FILE *ptr;
	int rv = 0;

#ifdef __STDIO_THREADSAFE
	/* Need two non-heirchal mutexs... be careful to avoid deadlock*/
	do {
		__STDIO_THREADLOCK(stream);
		if (__STDIO_THREADTRYLOCK_OPENLIST == 0) {
			break;
		}
		__STDIO_THREADUNLOCK(stream);
		usleep(10000);
	} while (1);
#endif /* __STDIO_THREADSAFE */

	__stdio_validate_FILE(stream); /* debugging only */

#ifdef __STDIO_BUFFERS
	if (stream->modeflags & __FLAG_WRITING) {
		rv = fflush(stream);	/* Write any pending buffered chars. */
	}							/* Also disables putc macro if used. */

#ifdef __STDIO_GETC_MACRO
	/* Not necessary after fflush, but always do this to reduce size. */
	stream->bufgetc = stream->bufstart;	/* Disable getc macro for safety. */
#endif /* __STDIO_GETC_MACRO */
#endif /* __STDIO_BUFFERS */

	/* Remove file from open list before closing file descriptor. */
	ptr = _stdio_openlist;
	if (ptr == stream) {
		_stdio_openlist = stream->nextopen;
	} else {
		while (ptr) {
			if (ptr->nextopen == stream) {
				ptr->nextopen = stream->nextopen;
				break;
			}
			ptr = ptr->nextopen;
		}
	}
	__STDIO_THREADUNLOCK_OPENLIST; /* We're done with the open file list. */

	if (__CLOSE(stream) < 0) {	/* Must close even if fflush failed. */
		rv = EOF;
	}
#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
	stream->cookie = NULL;		/* To aid debugging... */
#endif
	stream->filedes = -1;		/* To aid debugging... */

#ifdef __STDIO_BUFFERS
	if (stream->modeflags & __FLAG_FREEBUF) {
		free(stream->bufstart);
	}
#endif /* __STDIO_BUFFERS */

	/* TODO -- leave the stream locked to catch any dangling refs? */
	__STDIO_THREADUNLOCK(stream);

	/* At this point, any dangling refs to the stream are the result of
	 * a programming bug... so free the unlocked stream. */
	if (stream->modeflags & __FLAG_FREEFILE) {
		free(stream);
	}

	return rv;

#else  /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS) */

	int rv = 0;

	__STDIO_THREADLOCK(stream);

	__stdio_validate_FILE(stream); /* debugging only */

	if (__CLOSE(stream) < 0) {	/* Must close even if fflush failed. */
		rv = EOF;
	}

#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
	stream->cookie = NULL;		/* To aid debugging... */
#endif
	stream->filedes = -1;		/* To aid debugging... */

	__STDIO_THREADUNLOCK(stream);

	/* At this point, any dangling refs to the stream are the result of
	 * a programming bug... so free the unlocked stream. */
	if (stream->modeflags & __FLAG_FREEFILE) {
		free(stream);
	}

	return rv;

#endif /* defined(__STDIO_BUFFERS) || defined(__STDIO_GLIBC_CUSTOM_STREAMS )*/
}

#endif
/**********************************************************************/
#ifdef L_fflush

/*
 * Special cases:
 *   stream == NULL means fflush all writing streams (ANSI/ISO).
 *   stream == (FILE *) &_stdio_openlist -- implementation-specific hack
 *      meaning fflush all line buffered writing streams
 */

/*
 * NOTE: ANSI/ISO difference!!!  According to the standard, fflush is only
 * defined for write-only streams, or read/write streams whose last op
 * was a write.  However, reading is allowed for a read/write stream if
 * a file positioning operation was done (fseek, fsetpos) even though there
 * is no guarantee of flushing the write data in that case.  Hence, for
 * this case we keep a flag to indicate whether or not the buffer needs to
 * be flushed even if the last operation was a read.  This falls under the
 * implementation-defined behavior.  Otherwise, we would need to flush
 * every time we did fseek, etc. even if we were still in the buffer's range.
 */

/* Since the stream pointer arg is allowed to be NULL, or the address of the
 * stdio open file list if stdio is buffered in this implementation, we can't
 * use the UNLOCKED() macro here. */

#ifndef __STDIO_THREADSAFE
strong_alias(fflush_unlocked,fflush)
#else  /* __STDIO_THREADSAFE */
int fflush(register FILE *stream)
{
	int retval;

	if ((stream != NULL)
#ifdef __STDIO_BUFFERS
		&& (stream != (FILE *) &_stdio_openlist)
#endif /* __STDIO_BUFFERS */
		) {
		__STDIO_THREADLOCK(stream);
		retval = fflush_unlocked(stream);
		__STDIO_THREADUNLOCK(stream);
	} else {
		retval = fflush_unlocked(stream);
	}

	return retval;
}
#endif /* __STDIO_THREADSAFE */

int fflush_unlocked(register FILE *stream)
{
#ifdef __STDIO_BUFFERS

	int rv = 0;
	unsigned short mask = (__FLAG_NBF|__FLAG_LBF);

#ifndef NDEBUG
	if ((stream != NULL) && (stream != (FILE *) &_stdio_openlist)) {
		__stdio_validate_FILE(stream); /* debugging only */
	}
#endif

	if (stream == (FILE *) &_stdio_openlist) { /* fflush all line-buffered */
		stream = NULL;
		mask = __FLAG_LBF;
	}

	if (stream == NULL) {		/* flush all (line) buffered writing streams */
		/* Note -- We have to lock the list even in the unlocked function. */
		__STDIO_THREADLOCK_OPENLIST;
		/* TODO -- Can we work around locking the list to avoid keeping it
		 * locked if the write blocks? */
		for (stream = _stdio_openlist; stream; stream = stream->nextopen) {
			if (((stream->modeflags ^ __FLAG_NBF) & mask)
				&& (stream->modeflags & __FLAG_WRITING)
				&& fflush(stream)) {
				rv = EOF;
			}
		}
		__STDIO_THREADUNLOCK_OPENLIST;
	} else if (stream->modeflags & __FLAG_WRITING) {
		if (_stdio_fwrite(NULL, 0, stream) > 0) { /* flush buffer contents. */
			rv = -1;			/* Not all chars written. */
		}
	} else if (stream->modeflags & (__FLAG_READONLY|__FLAG_READING)) {
		/* TODO - __FLAG_READING too?  check glibc behavior */
		/* According to info, glibc returns an error when the file is opened
		 * in read-only mode.
		 * ANSI/ISO says behavior in this case is undefined but also says you
		 * shouldn't flush a stream you were reading from.
		 */
		stream->modeflags |= __FLAG_ERROR; /* TODO - check glibc behavior */
		__set_errno(EBADF);
		rv = -1;
	}

#ifndef NDEBUG
	if ((stream != NULL) && (stream != (FILE *) &_stdio_openlist)) {
		__stdio_validate_FILE(stream); /* debugging only */
	}
#endif
	return rv;

#else  /* __STDIO_BUFFERS --------------------------------------- */

#ifndef NDEBUG
	if ((stream != NULL) && (stream != (FILE *) &_stdio_openlist)) {
		__stdio_validate_FILE(stream); /* debugging only */
	}
#endif

	/* TODO -- check glibc behavior regarding error indicator */
	return ((stream != NULL)
			&& (stream->modeflags & (__FLAG_READONLY|__FLAG_READING))
			? ((stream->modeflags |= __FLAG_ERROR), __set_errno(EBADF), EOF)
			: 0 );

#endif /* __STDIO_BUFFERS */
}
#endif
/**********************************************************************/
#ifdef L_fopen

/* No reentrancy issues. */

FILE *fopen(const char * __restrict filename, const char * __restrict mode)
{
	return _stdio_fopen(filename, mode, NULL, -1);
}

#endif
/**********************************************************************/
#ifdef L__stdio_fopen

/*
 * Cases:
 *  fopen    : filename != NULL, stream == NULL, filedes == -1
 *  freopen  : filename != NULL, stream != NULL, filedes == -1
 *  fdopen   : filename == NULL, stream == NULL, filedes valid
 *  fsfopen  : filename != NULL, stream != NULL, filedes == -1
 *  fopen64  : filename != NULL, stream == NULL, filedes == -2
 */

#if O_ACCMODE != 3 || O_RDONLY != 0 || O_WRONLY != 1 || O_RDWR != 2
#error Assumption violated - mode constants
#endif

/* Internal function -- reentrant (locks open file list) */

FILE *_stdio_fopen(const char * __restrict filename,
					 register const char * __restrict mode,
					 register FILE * __restrict stream, int filedes)
{
	__mode_t open_mode;

	/* parse mode */
	open_mode = O_RDONLY;
	if (*mode != 'r') {			/* not read */
		open_mode = (O_WRONLY | O_CREAT | O_TRUNC);
		if (*mode != 'w') {		/* not write (create or truncate)*/
			open_mode = (O_WRONLY | O_CREAT | O_APPEND);
			if (*mode != 'a') {	/* not write (create or append) */
				__set_errno(EINVAL); /* then illegal mode */
				if (stream) {	/* If this is freopen, free the stream. */
					goto FREE_STREAM;
				}
				return NULL;
			}
		}
	}

	if ((*++mode == 'b')) {		/* binary mode (NOP currently) */
		++mode;
	}

	if (*mode == '+') {			/* read-write */
		++mode;
		open_mode &= ~(O_RDONLY | O_WRONLY);
		open_mode |= O_RDWR;
	}

#if defined(__STDIO_GNU_FEATURE) || defined(__STDIO_FOPEN_LARGEFILE_MODE)
	while (*mode) {				/* ignore everything else except ... */
#ifdef __STDIO_FOPEN_EXCLUSIVE_MODE
		if (*mode++ == 'x') {	/* open exclusive -- glibc extension */
			open_mode |= O_EXCL;
		}
#endif /* __STDIO_FOPEN_EXCLUSIVE_MODE */
#ifdef __STDIO_FOPEN_LARGEFILE_MODE
		if (*mode++ == 'F') {	/* open large file */
			open_mode |= O_LARGEFILE;
		}
#endif /* __STDIO_FOPEN_LARGEFILE_MODE */
	}
#endif /* __STDIO_FOPEN_EXCLUSIVE_MODE or __STDIO_FOPEN_LARGEFILE_MODE def'd */

#ifdef __BCC__
	mode = filename;			/* TODO:  help BCC with register allocation. */
#define filename mode
#endif /* __BCC__ */

	if (!stream) {				/* Need to allocate a FILE. */
#ifdef __STDIO_BUFFERS
		if ((stream = malloc(sizeof(FILE))) == NULL) {
			return stream;
		}
		stream->modeflags = __FLAG_FREEFILE;
		if ((stream->bufstart = malloc(BUFSIZ)) != 0) {
			stream->bufend = stream->bufstart + BUFSIZ;
			stream->modeflags |= __FLAG_FREEBUF;
		} else {
#if __STDIO_BUILTIN_BUF_SIZE > 0
			stream->bufstart = stream->unbuf;
			stream->bufend = stream->unbuf + sizeof(stream->unbuf);
#else  /* __STDIO_BUILTIN_BUF_SIZE > 0 */
			stream->bufstart = stream->bufend = NULL;
#endif /* __STDIO_BUILTIN_BUF_SIZE > 0 */
		}
#else  /* __STDIO_BUFFERS */
		if ((stream = malloc(sizeof(FILE))) == NULL) {
			return stream;
		}
		stream->modeflags = __FLAG_FREEFILE;
#endif /* __STDIO_BUFFERS */
	}

	if (filedes >= 0) {			/* Handle fdopen trickery. */
		/*
		 * NOTE: it is insufficient to just check R/W/RW agreement.
		 * We must also check for append mode agreement, as well as
		 * largefile agreement if applicable.
		 */
		int i = (open_mode & (O_ACCMODE|O_APPEND|O_LARGEFILE)) + 1;

		if ((i & (((int) filename) + 1)) != i) {
			__set_errno(EINVAL);
			filedes = -1;
		}
		stream->filedes = filedes;
	} else {
#ifdef __STDIO_LARGE_FILES
		if (filedes < -1) {
			open_mode |= O_LARGEFILE;
		}
#endif /* __STDIO_LARGE_FILES */
		stream->filedes = open(filename, open_mode, 0666);
	}

	if (stream->filedes < 0) {
	FREE_STREAM:
#ifdef __STDIO_BUFFERS
		if (stream->modeflags & __FLAG_FREEBUF) {
			free(stream->bufstart);
		}
#endif /* __STDIO_BUFFERS */
		if (stream->modeflags & __FLAG_FREEFILE) {
			free(stream);
		}
		return NULL;
	}

	stream->modeflags |=
#ifdef __STDIO_BUFFERS
		(isatty(stream->filedes) * __FLAG_LBF) |
#endif /* __STDIO_BUFFERS */
#if (O_APPEND == __FLAG_APPEND) \
&& ((O_LARGEFILE == __FLAG_LARGEFILE) || (O_LARGEFILE == 0))
		(open_mode & (O_APPEND|O_LARGEFILE)) | /* i386 linux and elks */
#else  /* (O_APPEND == __FLAG_APPEND) && (O_LARGEFILE == __FLAG_LARGEFILE) */
		((open_mode & O_APPEND) ? __FLAG_APPEND : 0) |
#ifdef __STDIO_LARGE_FILES
		((open_mode & O_LARGEFILE) ? __FLAG_LARGEFILE : 0) |
#endif /* __STDIO_LARGE_FILES */
#endif /* (O_APPEND == __FLAG_APPEND) && (O_LARGEFILE == __FLAG_LARGEFILE) */
		((((open_mode & O_ACCMODE) + 1) ^ 0x03) * __FLAG_WRITEONLY);

#ifdef __STDIO_BUFFERS
#ifdef __STDIO_GETC_MACRO
	stream->bufgetc =
#endif
#ifdef __STDIO_PUTC_MACRO
	stream->bufputc =
#endif
	stream->bufwpos = stream->bufrpos = stream->bufstart;
#endif /* __STDIO_BUFFERS */

#ifdef __STDIO_GLIBC_CUSTOM_STREAMS
	stream->cookie = &(stream->filedes);
	stream->gcs.read = _cs_read;
	stream->gcs.write = _cs_write;
	stream->gcs.seek = 0;		/* The internal seek func handles normals. */
	stream->gcs.close = _cs_close;
#endif /* __STDIO_GLIBC_CUSTOM_STREAMS */

#ifdef __STDIO_THREADSAFE
	__stdio_init_mutex(&stream->lock);
#endif /* __STDIO_THREADSAFE */

#if defined(__STDIO_BUFFERS) \
|| (defined(__STDIO_THREADSAFE) && defined(__STDIO_GLIBC_CUSTOM_STREAMS))
	__STDIO_THREADLOCK_OPENLIST;
	stream->nextopen = _stdio_openlist;	/* New files are inserted at */
	_stdio_openlist = stream;			/*   the head of the list. */
	__STDIO_THREADUNLOCK_OPENLIST;
#endif

	__stdio_validate_FILE(stream); /* debugging only */
	return stream;
#ifdef __BCC__
#undef filename
#endif /* __BCC__ */
}

#endif
/**********************************************************************/
#ifdef L_freopen

/* Reentrant. */

FILE *freopen(const char * __restrict filename, const char * __restrict mode,
			  register FILE * __restrict stream)
{
	/*
	 * ANSI/ISO allow (implementation-defined) change of mode for an
	 * existing file if filename is NULL.  It doesn't look like Linux
	 * supports this, so we don't here.
	 *
	 * NOTE: Whether or not the stream is free'd on failure is unclear
	 *       w.r.t. ANSI/ISO.  This implementation chooses to free the
	 *       stream and associated buffer if they were dynamically
	 *       allocated.
	 * TODO: Check the above.
	 * TODO: Apparently linux allows setting append mode.  Implement?
	 */
	unsigned short dynmode;
	FILE *fp;

	__STDIO_THREADLOCK(stream);

	/* First, flush and close, but don't deallocate, the stream. */
	/* This also removes the stream for the open file list. */
	dynmode = 
#ifdef __STDIO_BUFFERS
		//		__MASK_BUFMODE |		/* TODO: check */
#endif /* __STDIO_BUFFERS */
		(stream->modeflags & (__FLAG_FREEBUF|__FLAG_FREEFILE));

	stream->modeflags &= ~(__FLAG_FREEBUF|__FLAG_FREEFILE);
	fclose(stream);				/* Failures are ignored. */
	stream->modeflags = dynmode;

	fp = _stdio_fopen(filename, mode, stream, -1);

	__STDIO_THREADUNLOCK(stream);

	return fp;
}
#endif
/**********************************************************************/
#ifdef L_freopen64

/* Reentrant. */

/* TODO -- is it collecting the common work (40 bytes) into a function? */
FILE *freopen64(const char * __restrict filename, const char * __restrict mode,
				register FILE * __restrict stream)
{
	unsigned short dynmode;
	FILE *fp;

	__STDIO_THREADLOCK(stream);

	/* First, flush and close, but don't deallocate, the stream. */
	/* This also removes the stream for the open file list. */
	dynmode = 
#ifdef __STDIO_BUFFERS
		//		__MASK_BUFMODE |		/* TODO: check */
#endif /* __STDIO_BUFFERS */
		(stream->modeflags & (__FLAG_FREEBUF|__FLAG_FREEFILE));

	stream->modeflags &= ~(__FLAG_FREEBUF|__FLAG_FREEFILE);
	fclose(stream);				/* Failures are ignored. */
	stream->modeflags = dynmode;

	fp = _stdio_fopen(filename, mode, stream, -2); /* TODO -- magic const */

	__STDIO_THREADUNLOCK(stream);

	return fp;
}

#endif
/**********************************************************************/
#ifdef L_setbuf

/* Reentrant through setvbuf(). */

void setbuf(FILE * __restrict stream, register char * __restrict buf)
{
#ifdef __STDIO_BUFFERS
	int mode;

	mode = (buf != NULL) ? _IOFBF : _IONBF;
	setvbuf(stream, buf, mode, BUFSIZ);
#else  /* __STDIO_BUFFERS */
	/* TODO -- assert on stream? */
	/* Nothing to do. */
#endif /* __STDIO_BUFFERS */
}

#endif
/**********************************************************************/
#ifdef L_setvbuf

/* Reentrant. */

int setvbuf(register FILE * __restrict stream, register char * __restrict buf,
			int mode, size_t size)
{
#ifdef __STDIO_BUFFERS

	int allocated_buf_flag;
	int rv = EOF;

	__STDIO_THREADLOCK(stream);

	__stdio_validate_FILE(stream); /* debugging only */

	if (((unsigned int) mode) > 2) { /* Illegal mode. */
		/* TODO -- set an errno? */
		goto DONE;
	}

#ifdef __STDIO_FLEXIBLE_SETVBUF
	/* C89 standard requires no ops before setvbuf, but we can be flexible. */
	/* NOTE: This will trash any chars ungetc'd!!! */
	/* TODO: hmm could preserve unget count since ungot slots aren't changed (true?)
	 * but this will fail when buffered chars read from a pipe unless the user buf
	 * is big enough to copy everything over. */
	if (fseek(stream, 0L, SEEK_CUR)) {
		goto DONE;
	}
#else  /* __STDIO_FLEXIBLE_SETVBUF */
	/*
	 * Note: ANSI/ISO requires setvbuf to be called after opening the file
	 * but before any other operation other than a failed setvbuf call.
	 * We'll cheat here and only test if the wide or narrow mode flag has
	 * been set; i.e. no read or write (or unget or fwide) operations have
	 * taken place.
	 */
#ifdef __STDIO_WIDE
	if (stream->modeflags & (__FLAG_WIDE|__FLAG_NARROW)) {
		goto DONE;
	}
#else  /* __STDIO_WIDE */
	/* Note: This only checks if not currently reading or writing. */
	if (stream->modeflags & (__FLAG_READING|__FLAG_WRITING)) {
		goto DONE;
	}
#endif /* __STDIO_WIDE */
#endif /* __STDIO_FLEXIBLE_SETVBUF */

	if (mode == _IONBF) {
		size = 0;
		buf = NULL;
	}

	stream->modeflags &= ~(__MASK_BUFMODE);	/* Clear current mode */
	stream->modeflags |= mode * __FLAG_LBF;	/* and set new one. */

	allocated_buf_flag = 0;
	if ((!buf) && (size != (stream->bufend - stream->bufstart))) {
		/* No buffer supplied and requested size different from current. */
		allocated_buf_flag = __FLAG_FREEBUF;
		/* If size == 0, create a (hopefully) bogus non-null pointer... */
		if (!(buf = ((size > 0) ? malloc(size) : ((char *)NULL) + 1))) {
			goto DONE;		/* Keep current buffer. */
		}
	}

	/* TODO: setvbuf "signal" safety */
	if (buf && (buf != (char *) stream->bufstart)) { /* Want new buffer. */
		if (stream->modeflags & __FLAG_FREEBUF) {
			stream->modeflags &= ~(__FLAG_FREEBUF);
			free(stream->bufstart);
		}
		stream->modeflags |= allocated_buf_flag;	/* Free-able buffer? */
#ifdef __STDIO_GETC_MACRO
		stream->bufgetc =
#endif
#ifdef __STDIO_PUTC_MACRO
		stream->bufputc =
#endif
		stream->bufwpos = stream->bufrpos = stream->bufstart = buf;
		stream->bufend = buf + size;
	}

	__stdio_validate_FILE(stream); /* debugging only */

	rv = 0;

 DONE:
	__STDIO_THREADUNLOCK(stream);

	return rv;

#else  /* __STDIO_BUFFERS */
	__stdio_validate_FILE(stream); /* debugging only */
	/* TODO -- set errno for illegal mode? */

	return EOF;
#endif /* __STDIO_BUFFERS */
}

#endif
/**********************************************************************
int fprintf(FILE * __restrict stream, const char * __restrict format, ...);
int fscanf(FILE * __restrict stream, const char * __restrict format, ...);
int printf(const char * __restrict format, ...);
int scanf(const char * __restrict format, ...);
int snprintf(char * __restrict s, size_t n,
					const char * __restrict format, ...);
int sprintf(char * __restrict s, const char * __restrict format, ...);
int sscanf(char * __restrict s, const char * __restrict format, ...);
int vfprintf(FILE * __restrict stream, const char * __restrict format,
					va_list arg);
int vfscanf(FILE * __restrict stream, const char * __restrict format,
				   va_list arg);
int vprintf(const char * __restrict format, va_list arg);
int vscanf(const char * __restrict format, va_list arg);
int vsnprintf(char * __restrict s, size_t n,
					 const char * __restrict format, va_list arg);
int vsprintf(char * __restrict s, const char * __restrict format,
					va_list arg);
int vsscanf(char * __restrict s, const char * __restrict format,
				   va_list arg);
**********************************************************************/
#ifdef L_fgetc

/* Reentrancy handled by UNLOCKED() macro. */

UNLOCKED(int,fgetc,(FILE *stream),(stream))
{
	unsigned char buf[1];

#ifdef __STDIO_WIDE

	return (fread(buf, (size_t) 1, (size_t) 1, stream) > 0) ? *buf : EOF;

#else  /* __STDIO_WIDE */

	return (_stdio_fread(buf, (size_t) 1, stream) > 0) ? *buf : EOF;

#endif /* __STDIO_WIDE */
}

#endif
/**********************************************************************/
#ifdef L_fgets

/* Reentrancy handled by UNLOCKED() macro. */

UNLOCKED(char *,fgets,
		 (char *__restrict s, int n, register FILE * __restrict stream),
		 (s, n, stream))
{
	register char *p;
	int c;

	p = s;
	while ((n > 1) && ((c = getc(stream)) != EOF) && ((*p++ = c) != '\n')) {
		--n;
	}
	if (p == s) {
		/* TODO -- should we set errno? */
/*  		if (n <= 0) { */
/*  			errno = EINVAL; */
/*  		} */
		return NULL;
	}
	*p = 0;
	return s;
}

#endif
/**********************************************************************/
#ifdef L_fputc

/* Reentrancy handled by UNLOCKED() macro. */

UNLOCKED(int,fputc,(int c, FILE *stream),(c,stream))
{
	unsigned char buf[1];

	*buf = (unsigned char) c;

#ifdef __STDIO_WIDE

	return (fwrite(buf, (size_t) 1, (size_t) 1, stream) > 0) ? (*buf) : EOF;

#else  /* __STDIO_WIDE */

	return (_stdio_fwrite(buf, (size_t) 1, stream) > 0) ? (*buf) : EOF;

#endif /* __STDIO_WIDE */
}
#endif
/**********************************************************************/
#ifdef L_fputs

/* Reentrancy handled by UNLOCKED() macro. */

UNLOCKED(int,fputs,
		 (register const char * __restrict s, FILE * __restrict stream),
		 (s, stream))
{
	size_t n = strlen(s);

#ifdef __STDIO_WIDE

	return (fwrite(s, n, (size_t) 1, stream) > 0) ? n : EOF;

#else  /* __STDIO_WIDE */

	return (_stdio_fwrite(s, n, stream) == n) ? n : EOF;

#endif /* __STDIO_WIDE */
}

#endif
/**********************************************************************/
#ifdef L_getc
#undef getc

/* Reentrancy handled by UNLOCKED() macro. */

UNLOCKED(int,getc,(register FILE *stream),(stream))
{
	return __GETC(stream);		/* Invoke the macro. */
}

#endif
/**********************************************************************/
#ifdef L_getchar
#undef getchar					/* Just in case. */

/* Reentrancy handled by UNLOCKED() macro. */

UNLOCKED_STREAM(int,getchar,(void),(),_stdin)
{
	register FILE *stream = _stdin; /* This helps bcc optimize. */

	return __GETC(stream);
}

#endif
/**********************************************************************/
#ifdef L_gets

link_warning(gets, "the 'gets' function is dangerous and should not be used.")

/* Reentrant. */

char *gets(char *s)				/* WARNING!!! UNSAFE FUNCTION!!! */
{
	register FILE *stream = _stdin;	/* This helps bcc optimize. */
	register char *p = s;
	int c;

	__STDIO_THREADLOCK(stream);

	/* Note: don't worry about performance here... this shouldn't be used!
	 * Therefore, force actual function call. */
	while (((c = (*getc)(stream)) != EOF) && ((*p = c) != '\n')) {
		++p;
	}
	if ((c == EOF) || (s == p)) {
		s = NULL;
	} else {
		*p = 0;
	}

	__STDIO_THREADUNLOCK(stream);

	return s;
}

#endif
/**********************************************************************/
#ifdef L_putc
#undef putc

/* Reentrancy handled by UNLOCKED() macro. */

UNLOCKED(int,putc,(int c, register FILE *stream),(c,stream))
{
	return __PUTC(c, stream);	/* Invoke the macro. */
}

#endif
/**********************************************************************/
#ifdef L_putchar
#undef putchar					/* Just in case. */

/* Reentrancy handled by UNLOCKED() macro. */

UNLOCKED_STREAM(int,putchar,(int c),(c),_stdout)
{
	register FILE *stream = _stdout; /* This helps bcc optimize. */

	return __PUTC(c, stream);
}

#endif
/**********************************************************************/
#ifdef L_puts

/* Reentrant. */

int puts(register const char *s)
{
	register FILE *stream = _stdout; /* This helps bcc optimize. */
	int n;

	__STDIO_THREADLOCK(stream);

	n = fputs(s,stream) + 1;
	if (
#if 1
		fputc('\n',stream)
#else
		fputs("\n",stream)
#endif
		== EOF) {
		n = EOF;
	}

	__STDIO_THREADUNLOCK(stream);

	return n;
}

#endif
/**********************************************************************/
#ifdef L_ungetc
/*
 * Note: This is the application-callable ungetc.  If scanf calls this, it
 * should also set stream->ungot[1] to 0 if this is the only ungot.
 */

/* Reentrant. */

int ungetc(int c, register FILE *stream)
{
	__STDIO_THREADLOCK(stream);

	__stdio_validate_FILE(stream); /* debugging only */

#ifdef __STDIO_WIDE
	if (stream->modeflags & __FLAG_WIDE) {
		stream->modeflags |= __FLAG_ERROR;
		c = EOF;
		goto DONE;
	}
	stream->modeflags |= __FLAG_NARROW;
#endif /* __STDIO_WIDE */

	/* If can't read or there's been an error, or c == EOF, or ungot slots
	 * already filled, then return EOF */
	if ((stream->modeflags
		 & (__MASK_UNGOT2|__FLAG_WRITEONLY
#ifndef __STDIO_AUTO_RW_TRANSITION
			|__FLAG_WRITING		/* Note: technically no, but yes in spirit */
#endif /* __STDIO_AUTO_RW_TRANSITION */
			))
		|| ((stream->modeflags & __MASK_UNGOT1) && (stream->ungot[1]))
		|| (c == EOF) ) {
		c = EOF;
		goto DONE;;
	}

#ifdef __STDIO_BUFFERS
								/* TODO: shouldn't allow writing??? */
	if (stream->modeflags & __FLAG_WRITING) {
		fflush(stream);			/* Commit any write-buffered chars. */
	}
#endif /* __STDIO_BUFFERS */

	/* Clear EOF and WRITING flags, and set READING FLAG */
	stream->modeflags &= ~(__FLAG_EOF|__FLAG_WRITING);
	stream->modeflags |= __FLAG_READING;
	stream->ungot[1] = 1;		/* Flag as app ungetc call; scanf fixes up. */
	stream->ungot[(stream->modeflags++) & __MASK_UNGOT] = c;

#ifdef __STDIO_GETC_MACRO
	stream->bufgetc = stream->bufstart;	/* Must disable getc macro. */
#endif

	__stdio_validate_FILE(stream); /* debugging only */

 DONE:
	__STDIO_THREADUNLOCK(stream);

	return c;
}

#endif
/**********************************************************************/
#ifdef L_fread
/* NOTE: Surely ptr cannot point to a buffer of size > SIZE_MAX.
 * Therefore, we treat the case size * nmemb > SIZE_MAX as an error,
 * and include an assert() for it. */

/* Reentrancy handled by UNLOCKED() macro. */

UNLOCKED(size_t,fread,
		 (void * __restrict ptr, size_t size, size_t nmemb,
		  FILE * __restrict stream),
		 (ptr,size,nmemb,stream))
{
#ifdef __STDIO_WIDE
	if (stream->modeflags & __FLAG_WIDE) {
		stream->modeflags |= __FLAG_ERROR;
		/* TODO -- errno?  it this correct? */
		return 0;
	}
	stream->modeflags |= __FLAG_NARROW;
#endif /* __STDIO_WIDE */

	return (size == 0)
		? 0
		: (	assert( ((size_t)(-1)) / size >= nmemb ),
			_stdio_fread(ptr, nmemb * size, stream) / size );
}

#endif
/**********************************************************************/
#ifdef L_fwrite
/* NOTE: Surely ptr cannot point to a buffer of size > SIZE_MAX.
 * Therefore, we treat the case size * nmemb > SIZE_MAX as an error,
 * and include an assert() for it. */

/* Reentrancy handled by UNLOCKED() macro. */

UNLOCKED(size_t,fwrite,
		 (const void * __restrict ptr, size_t size, size_t nmemb,
		  FILE * __restrict stream),
		 (ptr,size,nmemb,stream))
{
#ifdef __STDIO_WIDE
	if (stream->modeflags & __FLAG_WIDE) {
		stream->modeflags |= __FLAG_ERROR;
		/* TODO -- errno?  it this correct? */
		return 0;
	}
	stream->modeflags |= __FLAG_NARROW;
#endif /* __STDIO_WIDE */

	return (size == 0)
		? 0
		: (	assert( ((size_t)(-1)) / size >= nmemb ),
			_stdio_fwrite(ptr, nmemb * size, stream) / size );
}

#endif
/**********************************************************************/
#if defined(L_fgetpos) || defined(L_fgetpos64)

/* Reentrant -- fgetpos() and fgetpos64(). */

#if defined(L_fgetpos) && defined(L_fgetpos64)
#error L_fgetpos and L_fgetpos64 are defined simultaneously!
#endif

#ifndef L_fgetpos64
#define fgetpos64	fgetpos
#define fpos64_t	fpos_t
#define ftello64	ftell
#endif


int fgetpos64(FILE * __restrict stream, register fpos64_t * __restrict pos)
{
	int retval;

	__STDIO_THREADLOCK(stream);

	retval = ((pos != NULL) && ((pos->__pos = ftello64(stream)) >= 0))
		? (
#ifdef __STDIO_MBSTATE_DATA
		   __COPY_MBSTATE(&(pos->__mbstate), &(stream->mbstate)),
#endif /* __STDIO_MBSTATE_DATA */
		   0)
		: (__set_errno(EINVAL), -1);

	__STDIO_THREADUNLOCK(stream);

	return retval;
}

#ifndef L_fgetpos64
#undef fgetpos64
#undef fpos64_t
#undef ftello64
#endif

#endif
/**********************************************************************/
#ifdef L_fseek
strong_alias(fseek, fseeko);
#endif

#if defined(L_fseek) && defined(__STDIO_LARGE_FILES)

int fseek(register FILE *stream, long int offset, int whence)
{
	return fseeko64(stream, offset, whence);
}

#endif

#if defined(L_fseeko64) || (defined(L_fseek) && !defined(__STDIO_LARGE_FILES))

#ifndef L_fseeko64
#define fseeko64	fseek
#define __off64_t	long int
#endif

/* Reentrant -- fseek(), fseeko(), fseeko64() */

int fseeko64(register FILE *stream, __off64_t offset, int whence)
{
#if SEEK_SET != 0 || SEEK_CUR != 1 || SEEK_END != 2
#error Assumption violated -- values of SEEK_SET, SEEK_CUR, SEEK_END
#endif
	__offmax_t pos[1];
	int retval;

	if ( ((unsigned int) whence) > 2 ) {
		__set_errno(EINVAL);
		return -1;
	}

	__STDIO_THREADLOCK(stream);

	__stdio_validate_FILE(stream); /* debugging only */

	retval = -1;
	*pos = offset;
	if (
#ifdef __STDIO_BUFFERS
		/* First commit any pending buffered writes. */
		((stream->modeflags & __FLAG_WRITING) && fflush(stream)) ||
#endif /* __STDIO_BUFFERS */
		((whence == SEEK_CUR) && (_stdio_adjpos(stream, pos) < 0))
		|| (_stdio_lseek(stream, pos, whence) < 0)
		) {
		__stdio_validate_FILE(stream); /* debugging only */
		goto DONE;
	}

#ifdef __STDIO_BUFFERS
	/* only needed if reading but do it anyway to avoid test */
#ifdef __STDIO_GETC_MACRO
	stream->bufgetc =			/* Must disable getc. */
#endif
	stream->bufwpos = stream->bufrpos = stream->bufstart;
#endif /* __STDIO_BUFFERS */

	stream->modeflags &=
		~(__FLAG_READING|__FLAG_WRITING|__FLAG_EOF|__MASK_UNGOT);

#ifdef __STDIO_MBSTATE_DATA
	/* TODO: don't clear state if don't move? */
	__INIT_MBSTATE(&(stream->mbstate));
#endif /* __STDIO_MBSTATE_DATA */
	__stdio_validate_FILE(stream); /* debugging only */

	retval = 0;

 DONE:
	__STDIO_THREADUNLOCK(stream);

	return retval;
}

#ifndef L_fseeko64
#undef fseeko64
#undef __off64_t
#endif

#endif
/**********************************************************************/
#if defined(L_fsetpos) || defined(L_fsetpos64)

#if defined(L_fsetpos) && defined(L_fsetpos64)
#error L_fsetpos and L_fsetpos64 are defined simultaneously!
#endif

#ifndef L_fsetpos64
#define fsetpos64	fsetpos
#define fpos64_t	fpos_t
#define fseeko64	fseek
#endif

/* Reentrant -- fgetpos{64}() through fseek{64}(). */

int fsetpos64(FILE *stream, register const fpos64_t *pos)
{
	if (!pos) {
		__set_errno(EINVAL);
		return EOF;
	}
#ifdef __STDIO_MBSTATE_DATA
#error unimplemented and non-reentrant besides!
	{
		int retval;
		if ((retval = fseeko64(stream, pos->__pos, SEEK_SET)) == 0) {
			__COPY_MBSTATE(&(stream->mbstate), &(pos->__mbstate));
		}
		return retval;
	}
#else  /* __STDIO_MBSTATE_DATA */
	return fseeko64(stream, pos->__pos, SEEK_SET);
#endif /* __STDIO_MBSTATE_DATA */
}

#ifndef L_fsetpos64
#undef fsetpos64
#undef fpos64_t
#undef fseeko64
#endif

#endif
/**********************************************************************/
#ifdef L_ftell
strong_alias(ftell, ftello);
#endif

#if defined(L_ftell) && defined(__STDIO_LARGE_FILES)
long int ftell(register FILE *stream)
{
	__offmax_t pos = ftello64(stream);

	return (pos == ((long int) pos)) ? pos : (__set_errno(EOVERFLOW), -1);
}
#endif

#if defined(L_ftello64) || (defined(L_ftell) && !defined(__STDIO_LARGE_FILES))

#ifndef L_ftello64
#define ftello64	ftell
#define __off64_t	long int
#endif

/* Reentrant -- ftell, ftello, ftello64. */

__off64_t ftello64(register FILE *stream)
{
	__offmax_t pos[1];
	__off64_t retval;

	__STDIO_THREADLOCK(stream);

	retval = (((*pos = 0), (_stdio_lseek(stream, pos, SEEK_CUR) < 0))
			  || (_stdio_adjpos(stream, pos) < 0)) ? -1 : *pos;

	__STDIO_THREADUNLOCK(stream);

	return retval;
}

#ifndef L_ftello64
#undef ftello64
#undef __off64_t
#endif

#endif
/**********************************************************************/
#ifdef L_rewind

void rewind(register FILE *stream)
{
	__STDIO_THREADLOCK(stream);

	__CLEARERR(stream);			/* Clear errors first and then seek */
	fseek(stream, 0L, SEEK_SET); /* in case there is an error seeking. */

	__STDIO_THREADUNLOCK(stream);
}

#endif
/**********************************************************************/
#ifdef L_clearerr
#undef clearerr

/* Reentrancy handled by UNLOCKED_VOID_RETURN() macro. */

UNLOCKED_VOID_RETURN(clearerr,(FILE *stream),(stream))
{
	__CLEARERR(stream);
}

#endif
/**********************************************************************/
#ifdef L_feof
#undef feof

/* Reentrancy handled by UNLOCKED() macro. */

UNLOCKED(int,feof,(FILE *stream),(stream))
{
	return __FEOF(stream);
}

#endif
/**********************************************************************/
#ifdef L_ferror
#undef ferror

/* Reentrancy handled by UNLOCKED() macro. */

UNLOCKED(int,ferror,(FILE *stream),(stream))
{
	return __FERROR(stream);
}

#endif
/**********************************************************************/
#ifdef L_perror

/* TODO -- not allowed to interfere with static storage of strerror(). */

void perror(register const char *s)
{
	/* If the program is calling perror, it's a safe bet that printf and
	 * friends are used as well.  It is also possible that the calling
	 * program could buffer stderr, or reassign it. */

	register const char *sep;

	sep = ": ";
	if (!(s && *s)) {			/* Caller did not supply a prefix message */
		s = (sep += 2);			/* or passed an empty string. */
	}

#if 1
#ifdef __STDIO_PRINTF_M_SPEC
	fprintf(_stderr, "%s%s%m\n", s, sep); /* Use the gnu %m feature. */
#else
	/* TODO: use strerror_r instead? */
	fprintf(_stderr, "%s%s%s\n", s, sep, strerror(errno));
#endif
#else
	/* Note: Assumes stderr not closed or buffered. */
	__STDIO_THREADLOCK(stderr);
	_stdio_fdout(STDERR_FILENO, s, sep, strerror(errno));
	__STDIO_THREADUNLOCK(stderr);
#endif
}

#endif
/**********************************************************************/
/* UTILITY funcs */
/**********************************************************************/
#ifdef L__stdio_fdout

/* Not reentrant -- TODO: lock associated stream if a know file descriptor? */

void _stdio_fdout(int fd, ...)
{
	va_list arg;
	const char *p;

	va_start(arg, fd);
	while ((p = va_arg(arg, const char *)) != NULL) {
		write(fd, p, strlen(p));
	}
	va_end(arg);
}

#endif
/**********************************************************************/
#ifdef L__uintmaxtostr

/* Avoid using long long / and % operations to cut down dependencies on
 * libgcc.a.  Definitely helps on i386 at least. */
#if (UINTMAX_MAX > UINT_MAX) && ((UINTMAX_MAX/UINT_MAX) - 2 <= UINT_MAX)
#define INTERNAL_DIV_MOD
#endif

char *_uintmaxtostr(char * __restrict bufend, uintmax_t uval,
					 int base, __UIM_CASE alphacase)
{
    int negative;
    unsigned int digit;
#ifdef INTERNAL_DIV_MOD
	unsigned int H, L, high, low, rh;
#endif

	negative = 0;
	if (base < 0) {				/* signed value */
		base = -base;
		if (uval > INTMAX_MAX) {
			uval = -uval;
			negative = 1;
		}
	}

	/* this is an internal routine -- we shouldn't need to check this */
	assert(!((base < 2) || (base > 36)));

    *bufend = '\0';

#ifndef INTERNAL_DIV_MOD
    do {
		digit = uval % base;
		uval /= base;

		*--bufend = ( (digit < 10) ? digit + '0' : digit + alphacase );
    } while (uval);

#else  /* ************************************************** */

	H = (UINT_MAX / base);
	L = UINT_MAX % base + 1;
	if (L == base) {
		++H;
		L = 0;
	}
	low = (unsigned int) uval;
	high = (unsigned int) (uval >> (sizeof(unsigned int) * CHAR_BIT));

    do {
		rh = high % base;
		high /= base;
		digit = (low % base) + (L * rh);
		low = (low / base) + (H * rh) + (digit / base);
		digit %= base;
		
		*--bufend = ( (digit < 10) ? digit + '0' : digit + alphacase );
    } while (low | high);

#endif /******************************************************/

    if (negative) {
		*--bufend = '-';
    }

    return bufend;
}
#undef INTERNAL_DIV_MOD

#endif