503 lines
15 KiB
C++
503 lines
15 KiB
C++
/* miscfuncs.cc: misc funcs that don't belong anywhere else
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
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2005, 2006, 2007 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include "cygerrno.h"
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#include <sys/errno.h>
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#include <sys/uio.h>
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#include <assert.h>
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#include <alloca.h>
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#include <limits.h>
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#include <wchar.h>
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#include <wingdi.h>
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#include <winuser.h>
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#include <winnls.h>
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#include "cygthread.h"
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#include "cygtls.h"
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#include "ntdll.h"
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long tls_ix = -1;
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const char case_folded_lower[] NO_COPY = {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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32, '!', '"', '#', '$', '%', '&', 39, '(', ')', '*', '+', ',', '-', '.', '/',
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ':', ';', '<', '=', '>', '?',
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'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
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'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '[', 92, ']', '^', '_',
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'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
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'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '{', '|', '}', '~', 127,
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128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
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144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
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160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
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176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
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192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
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208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
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224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
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240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255
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};
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const char case_folded_upper[] NO_COPY = {
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0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
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32, '!', '"', '#', '$', '%', '&', 39, '(', ')', '*', '+', ',', '-', '.', '/',
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ':', ';', '<', '=', '>', '?',
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'@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
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'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '[', 92, ']', '^', '_',
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'`', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
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'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '{', '|', '}', '~', 127,
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128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
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144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
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160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
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176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
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192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
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208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
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224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
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240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255
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};
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const char isalpha_array[] NO_COPY = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
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0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 0, 0, 0, 0, 0,
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0,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
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0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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extern "C" int __stdcall
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cygwin_wcscasecmp (const wchar_t *ws, const wchar_t *wt)
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{
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UNICODE_STRING us, ut;
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RtlInitUnicodeString (&us, ws);
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RtlInitUnicodeString (&ut, wt);
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return RtlCompareUnicodeString (&us, &ut, TRUE);
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}
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extern "C" int __stdcall
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cygwin_wcsncasecmp (const wchar_t *ws, const wchar_t *wt, size_t n)
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{
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UNICODE_STRING us, ut;
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size_t ls = 0, lt = 0;
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while (ws[ls] && ls < n)
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++ls;
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RtlInitCountedUnicodeString (&us, ws, ls * sizeof (WCHAR));
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while (wt[lt] && lt < n)
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++lt;
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RtlInitCountedUnicodeString (&ut, wt, lt * sizeof (WCHAR));
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return RtlCompareUnicodeString (&us, &ut, TRUE);
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}
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extern "C" int __stdcall
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cygwin_strcasecmp (const char *cs, const char *ct)
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{
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UNICODE_STRING us, ut;
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ULONG len;
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len = (strlen (cs) + 1) * sizeof (WCHAR);
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RtlInitEmptyUnicodeString (&us, (PWCHAR) alloca (len), len);
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us.Length = sys_mbstowcs (us.Buffer, cs, us.MaximumLength) * sizeof (WCHAR);
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len = (strlen (ct) + 1) * sizeof (WCHAR);
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RtlInitEmptyUnicodeString (&ut, (PWCHAR) alloca (len), len);
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ut.Length = sys_mbstowcs (ut.Buffer, ct, ut.MaximumLength) * sizeof (WCHAR);
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return RtlCompareUnicodeString (&us, &ut, TRUE);
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}
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extern "C" int __stdcall
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cygwin_strncasecmp (const char *cs, const char *ct, size_t n)
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{
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UNICODE_STRING us, ut;
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ULONG len;
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size_t ls = 0, lt = 0;
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while (cs[ls] && ls < n)
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++ls;
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len = ls * sizeof (WCHAR);
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RtlInitEmptyUnicodeString (&us, (PWCHAR) alloca (len), len);
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us.Length = MultiByteToWideChar (get_cp (), 0, cs, ls, us.Buffer,
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us.MaximumLength) * sizeof (WCHAR);
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while (ct[lt] && lt < n)
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++lt;
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len = lt * sizeof (WCHAR);
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RtlInitEmptyUnicodeString (&ut, (PWCHAR) alloca (len), len);
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ut.Length = MultiByteToWideChar (get_cp (), 0, ct, lt, ut.Buffer,
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ut.MaximumLength) * sizeof (WCHAR);
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return RtlCompareUnicodeString (&us, &ut, TRUE);
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}
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extern "C" wchar_t * __stdcall
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cygwin_wcslwr (wchar_t *string)
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{
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UNICODE_STRING us;
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RtlInitUnicodeString (&us, string);
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RtlDowncaseUnicodeString (&us, &us, FALSE);
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return string;
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}
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extern "C" wchar_t * __stdcall
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cygwin_wcsupr (wchar_t *string)
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{
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UNICODE_STRING us;
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RtlInitUnicodeString (&us, string);
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RtlUpcaseUnicodeString (&us, &us, FALSE);
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return string;
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}
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extern "C" char * __stdcall
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cygwin_strlwr (char *string)
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{
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UNICODE_STRING us;
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size_t len = (strlen (string) + 1) * sizeof (WCHAR);
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us.MaximumLength = len; us.Buffer = (PWCHAR) alloca (len);
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us.Length = sys_mbstowcs (us.Buffer, string, len) * sizeof (WCHAR)
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- sizeof (WCHAR);
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RtlDowncaseUnicodeString (&us, &us, FALSE);
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sys_wcstombs (string, len / sizeof (WCHAR), us.Buffer);
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return string;
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}
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extern "C" char * __stdcall
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cygwin_strupr (char *string)
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{
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UNICODE_STRING us;
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size_t len = (strlen (string) + 1) * sizeof (WCHAR);
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us.MaximumLength = len; us.Buffer = (PWCHAR) alloca (len);
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us.Length = sys_mbstowcs (us.Buffer, string, len) * sizeof (WCHAR)
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- sizeof (WCHAR);
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RtlUpcaseUnicodeString (&us, &us, FALSE);
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sys_wcstombs (string, len / sizeof (WCHAR), us.Buffer);
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return string;
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}
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/* FIXME? We only support standard ANSI/OEM codepages according to
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http://www.microsoft.com/globaldev/reference/cphome.mspx as well
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as UTF-8 and codepage 1361, which is also mentioned as valid
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doublebyte codepage in MSDN man pages (e.g. IsDBCSLeadByteEx).
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Everything else will be hosed. */
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bool
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is_cp_multibyte (UINT cp)
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{
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switch (cp)
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{
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case 932:
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case 936:
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case 949:
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case 950:
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case 1361:
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case 65001:
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return true;
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}
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return false;
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}
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/* OMYGOD! CharNextExA is not UTF-8 aware! It only works fine with
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double byte charsets. So we have to do it ourselves for UTF-8.
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While being at it, we do more. If a double-byte or multibyte
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sequence is truncated due to an early end, we need a way to recognize
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it. The reason is that multiple buffered write statements might
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accidentally stop and start in the middle of a single character byte
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sequence. If we have to interpret the byte sequences (as in
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fhandler_console), we would print wrong output in these cases.
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So we have four possible return values here:
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ret = end if str >= end
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ret = NULL if we encounter an invalid byte sequence
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ret = str if we encounter the start byte of a truncated byte sequence
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ret = str + n if we encounter a vaild byte sequence
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*/
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const unsigned char *
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next_char (UINT cp, const unsigned char *str, const unsigned char *end)
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{
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const unsigned char *ret = NULL;
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if (str >= end)
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return end;
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switch (cp)
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{
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case 932:
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case 936:
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case 949:
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case 950:
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case 1361:
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if (*str <= 0x7f)
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ret = str + 1;
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else if (str == end - 1 && IsDBCSLeadByteEx (cp, *str))
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ret = str;
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else
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ret = (const unsigned char *) CharNextExA (cp, (const CHAR *) str, 0);
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break;
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case CP_UTF8:
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switch (str[0] >> 4)
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{
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case 0x0 ... 0x7: /* One byte character. */
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ret = str + 1;
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break;
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case 0x8 ... 0xb: /* Followup byte. Invalid as first byte. */
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ret = NULL;
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break;
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case 0xc ... 0xd: /* Two byte character. */
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/* Check followup bytes for validity. */
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if (str >= end - 1)
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ret = str;
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else if (str[1] <= 0xbf)
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ret = str + 2;
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else
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ret = NULL;
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break;
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case 0xe: /* Three byte character. */
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if (str >= end - 2)
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ret = str;
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else if ((str[1] & 0xc0) == 0x80 && (str[2] & 0xc0) == 0x80
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&& (str[0] != 0xe0 || str[1] >= 0xa0)
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&& (str[0] != 0xed || str[1] <= 0x9f))
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ret = str + 3;
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else
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ret = NULL;
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break;
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case 0xf: /* Four byte character. */
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if (str[0] >= 0xf8)
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ret = NULL;
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else if (str >= end - 3)
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ret = str;
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else if ((str[1] & 0xc0) == 0x80 && (str[2] & 0xc0) == 0x80
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&& (str[3] & 0xc0) == 0x80
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&& (str[0] == 0xf0 || str[1] >= 0x90)
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&& (str[0] == 0xf4 || str[1] <= 0x8f))
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ret = str + 4;
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else
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ret = NULL;
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break;
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}
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break;
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default:
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ret = str + 1;
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break;
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}
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return ret;
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}
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int __stdcall
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check_invalid_virtual_addr (const void *s, unsigned sz)
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{
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MEMORY_BASIC_INFORMATION mbuf;
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const void *end;
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for (end = (char *) s + sz; s < end;
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s = (char *) mbuf.BaseAddress + mbuf.RegionSize)
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if (!VirtualQuery (s, &mbuf, sizeof mbuf))
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return EINVAL;
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return 0;
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}
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static char __attribute__ ((noinline))
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dummytest (volatile char *p)
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{
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return *p;
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}
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ssize_t
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check_iovec (const struct iovec *iov, int iovcnt, bool forwrite)
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{
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if (iovcnt <= 0 || iovcnt > IOV_MAX)
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{
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set_errno (EINVAL);
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return -1;
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}
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myfault efault;
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if (efault.faulted (EFAULT))
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return -1;
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size_t tot = 0;
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while (iovcnt != 0)
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{
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if (iov->iov_len > SSIZE_MAX || (tot += iov->iov_len) > SSIZE_MAX)
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{
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set_errno (EINVAL);
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return -1;
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}
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volatile char *p = ((char *) iov->iov_base) + iov->iov_len - 1;
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if (!iov->iov_len)
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/* nothing to do */;
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else if (!forwrite)
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*p = dummytest (p);
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else
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dummytest (p);
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iov++;
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iovcnt--;
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}
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assert (tot <= SSIZE_MAX);
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return (ssize_t) tot;
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}
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extern "C" int
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low_priority_sleep (DWORD secs)
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{
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HANDLE thisthread = GetCurrentThread ();
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int curr_prio = GetThreadPriority (thisthread);
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bool staylow;
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if (secs != INFINITE)
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staylow = false;
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else
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{
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secs = 0;
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staylow = true;
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}
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if (!secs)
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{
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for (int i = 0; i < 3; i++)
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SwitchToThread ();
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}
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else
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{
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int new_prio;
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if (GetCurrentThreadId () == cygthread::main_thread_id)
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new_prio = THREAD_PRIORITY_LOWEST;
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else
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new_prio = GetThreadPriority (hMainThread);
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if (curr_prio != new_prio)
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/* Force any threads in normal priority to be scheduled */
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SetThreadPriority (thisthread, new_prio);
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Sleep (secs);
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if (!staylow && curr_prio != new_prio)
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SetThreadPriority (thisthread, curr_prio);
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}
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return curr_prio;
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}
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/* Get a default value for the nice factor. When changing these values,
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have a look into the below function nice_to_winprio. The values must
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match the layout of the static "priority" array. */
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int
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winprio_to_nice (DWORD prio)
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{
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switch (prio)
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{
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case REALTIME_PRIORITY_CLASS:
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return -20;
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case HIGH_PRIORITY_CLASS:
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return -16;
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case ABOVE_NORMAL_PRIORITY_CLASS:
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return -8;
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case NORMAL_PRIORITY_CLASS:
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return 0;
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case BELOW_NORMAL_PRIORITY_CLASS:
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return 8;
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case IDLE_PRIORITY_CLASS:
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return 16;
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}
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return 0;
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}
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/* Get a Win32 priority matching the incoming nice factor. The incoming
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nice is limited to the interval [-NZERO,NZERO-1]. */
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DWORD
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nice_to_winprio (int &nice)
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{
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static const DWORD priority[] NO_COPY =
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{
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REALTIME_PRIORITY_CLASS, /* 0 */
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HIGH_PRIORITY_CLASS, /* 1 */
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HIGH_PRIORITY_CLASS,
|
|
HIGH_PRIORITY_CLASS,
|
|
HIGH_PRIORITY_CLASS,
|
|
HIGH_PRIORITY_CLASS,
|
|
HIGH_PRIORITY_CLASS,
|
|
HIGH_PRIORITY_CLASS, /* 7 */
|
|
ABOVE_NORMAL_PRIORITY_CLASS, /* 8 */
|
|
ABOVE_NORMAL_PRIORITY_CLASS,
|
|
ABOVE_NORMAL_PRIORITY_CLASS,
|
|
ABOVE_NORMAL_PRIORITY_CLASS,
|
|
ABOVE_NORMAL_PRIORITY_CLASS,
|
|
ABOVE_NORMAL_PRIORITY_CLASS,
|
|
ABOVE_NORMAL_PRIORITY_CLASS,
|
|
ABOVE_NORMAL_PRIORITY_CLASS, /* 15 */
|
|
NORMAL_PRIORITY_CLASS, /* 16 */
|
|
NORMAL_PRIORITY_CLASS,
|
|
NORMAL_PRIORITY_CLASS,
|
|
NORMAL_PRIORITY_CLASS,
|
|
NORMAL_PRIORITY_CLASS,
|
|
NORMAL_PRIORITY_CLASS,
|
|
NORMAL_PRIORITY_CLASS,
|
|
NORMAL_PRIORITY_CLASS, /* 23 */
|
|
BELOW_NORMAL_PRIORITY_CLASS, /* 24 */
|
|
BELOW_NORMAL_PRIORITY_CLASS,
|
|
BELOW_NORMAL_PRIORITY_CLASS,
|
|
BELOW_NORMAL_PRIORITY_CLASS,
|
|
BELOW_NORMAL_PRIORITY_CLASS,
|
|
BELOW_NORMAL_PRIORITY_CLASS,
|
|
BELOW_NORMAL_PRIORITY_CLASS,
|
|
BELOW_NORMAL_PRIORITY_CLASS, /* 31 */
|
|
IDLE_PRIORITY_CLASS, /* 32 */
|
|
IDLE_PRIORITY_CLASS,
|
|
IDLE_PRIORITY_CLASS,
|
|
IDLE_PRIORITY_CLASS,
|
|
IDLE_PRIORITY_CLASS,
|
|
IDLE_PRIORITY_CLASS,
|
|
IDLE_PRIORITY_CLASS,
|
|
IDLE_PRIORITY_CLASS /* 39 */
|
|
};
|
|
if (nice < -NZERO)
|
|
nice = -NZERO;
|
|
else if (nice > NZERO - 1)
|
|
nice = NZERO - 1;
|
|
DWORD prio = priority[nice + NZERO];
|
|
if (!wincap.has_extended_priority_class ()
|
|
&& (prio == BELOW_NORMAL_PRIORITY_CLASS
|
|
|| prio == ABOVE_NORMAL_PRIORITY_CLASS))
|
|
prio = NORMAL_PRIORITY_CLASS;
|
|
return prio;
|
|
}
|
|
|
|
#undef CreatePipe
|
|
bool
|
|
create_pipe (PHANDLE hr,PHANDLE hw, LPSECURITY_ATTRIBUTES sa, DWORD n)
|
|
{
|
|
for (int i = 0; i < 10; i++)
|
|
if (CreatePipe (hr, hw, sa, n))
|
|
return true;
|
|
else if (GetLastError () == ERROR_PIPE_BUSY && i < 9)
|
|
Sleep (10);
|
|
else
|
|
break;
|
|
return false;
|
|
}
|