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/* miscfuncs.cc: misc funcs that don't belong anywhere else
Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Red Hat, Inc.
This file is part of Cygwin.
This software is a copyrighted work licensed under the terms of the
Cygwin license. Please consult the file "CYGWIN_LICENSE" for
details. */
#define _WIN32_WINNT 0x400
#include "winsup.h"
#include "cygerrno.h"
#include <sys/errno.h>
#include <sys/uio.h>
#include <assert.h>
#include <limits.h>
#include <winbase.h>
#include <winnls.h>
#include "cygthread.h"
long tls_ix = -1;
const char case_folded_lower[] NO_COPY = {
0, 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, '!', '"', '#', '$', '%', '&', 39, '(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ':', ';', '<', '=', '>', '?',
'@', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '[', 92, ']', '^', '_',
'`', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o',
'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '{', '|', '}', '~', 127,
128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143,
144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175,
176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191,
192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207,
208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223,
224, 225, 226, 227, 228, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
240, 241, 242, 243, 244, 245, 246, 247, 248, 249, 250, 251, 252, 253, 254, 255
};
const char case_folded_upper[] NO_COPY = {
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, '!', '"', '#', '$', '%', '&', 39, '(', ')', '*', '+', ',', '-', '.', '/',
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', ':', ';', '<', '=', '>', '?',
'@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '[', 92, ']', '^', '_',
'`', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O',
'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '{', '|', '}', '~', 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
};
const char isalpha_array[] NO_COPY = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 0, 0, 0, 0, 0,
0,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
#define ch_case_eq(ch1, ch2) (cyg_tolower(ch1) == cyg_tolower(ch2))
#if 0
/* Return TRUE if two strings match up to length n */
extern "C" int __stdcall
strncasematch (const char *s1, const char *s2, size_t n)
{
if (s1 == s2)
return 1;
n++;
while (--n && *s1)
{
if (!ch_case_eq (*s1, *s2))
return 0;
s1++; s2++;
}
return !n || *s2 == '\0';
}
/* Return TRUE if two strings match */
extern "C" int __stdcall
strcasematch (const char *s1, const char *s2)
{
if (s1 == s2)
return 1;
while (*s1)
{
if (!ch_case_eq (*s1, *s2))
return 0;
s1++; s2++;
}
return *s2 == '\0';
}
#endif
extern "C" char * __stdcall
strcasestr (const char *searchee, const char *lookfor)
{
if (*searchee == 0)
{
if (*lookfor)
return NULL;
return (char *) searchee;
}
while (*searchee)
{
int i = 0;
while (1)
{
if (lookfor[i] == 0)
return (char *) searchee;
if (!ch_case_eq (lookfor[i], searchee[i]))
break;
lookfor++;
}
searchee++;
}
return NULL;
}
int __stdcall
check_null_str (const char *name)
{
if (name && !IsBadStringPtr (name, MAX_PATH))
return 0;
return EFAULT;
}
int __stdcall
check_null_empty_str (const char *name)
{
if (name && !IsBadStringPtr (name, MAX_PATH))
return !*name ? ENOENT : 0;
return EFAULT;
}
int __stdcall
check_null_empty_str_errno (const char *name)
{
int __err;
if ((__err = check_null_empty_str (name)))
set_errno (__err);
return __err;
}
int __stdcall
check_null_str_errno (const char *name)
{
int __err;
if ((__err = check_null_str (name)))
set_errno (__err);
return __err;
}
int __stdcall
__check_null_invalid_struct (void *s, unsigned sz)
{
if (s && !IsBadWritePtr (s, sz))
return 0;
return EFAULT;
}
int __stdcall
__check_null_invalid_struct_errno (void *s, unsigned sz)
{
int err;
if ((err = __check_null_invalid_struct (s, sz)))
set_errno (err);
return err;
}
int __stdcall
__check_invalid_read_ptr_errno (const void *s, unsigned sz)
{
if (s && !IsBadReadPtr (s, sz))
return 0;
return set_errno (EFAULT);
}
ssize_t
check_iovec_for_read (const struct iovec *iov, int iovcnt)
{
if (iovcnt <= 0 || iovcnt > IOV_MAX)
{
set_errno (EINVAL);
return -1;
}
if (__check_invalid_read_ptr_errno (iov, iovcnt * sizeof (*iov)))
return -1;
size_t tot = 0;
while (iovcnt != 0)
{
if (iov->iov_len > SSIZE_MAX || (tot += iov->iov_len) > SSIZE_MAX)
{
set_errno (EINVAL);
return -1;
}
if (iov->iov_len
&& __check_null_invalid_struct_errno (iov->iov_base, iov->iov_len))
return -1;
iov += 1;
iovcnt -= 1;
}
assert (tot <= SSIZE_MAX);
return (ssize_t) tot;
}
ssize_t
check_iovec_for_write (const struct iovec *iov, int iovcnt)
{
if (iovcnt <= 0 || iovcnt > IOV_MAX)
{
set_errno (EINVAL);
return -1;
}
if (__check_invalid_read_ptr_errno (iov, iovcnt * sizeof (*iov)))
return -1;
size_t tot = 0;
while (iovcnt != 0)
{
if (iov->iov_len > SSIZE_MAX || (tot += iov->iov_len) > SSIZE_MAX)
{
set_errno (EINVAL);
return -1;
}
if (iov->iov_len
&& __check_invalid_read_ptr_errno (iov->iov_base, iov->iov_len))
return -1;
iov += 1;
iovcnt -= 1;
}
assert (tot <= SSIZE_MAX);
return (ssize_t) tot;
}
UINT
get_cp ()
{
return current_codepage == ansi_cp ? GetACP() : GetOEMCP();
}
int __stdcall
sys_wcstombs (char *tgt, const WCHAR *src, int len)
{
return WideCharToMultiByte (get_cp (), 0, src, -1, tgt, len, NULL, NULL);
}
int __stdcall
sys_mbstowcs (WCHAR *tgt, const char *src, int len)
{
return MultiByteToWideChar (get_cp (), 0, src, -1, tgt, len);
}
int __stdcall
low_priority_sleep (DWORD secs)
{
HANDLE thisthread = GetCurrentThread ();
int curr_prio = GetThreadPriority (thisthread);
bool staylow;
if (secs != INFINITE)
staylow = false;
else
{
secs = 0;
staylow = true;
}
if (!secs && wincap.has_switch_to_thread ())
{
for (int i = 0; i < 10; i++)
SwitchToThread ();
}
else
{
int new_prio;
if (GetCurrentThreadId () == cygthread::main_thread_id)
new_prio = THREAD_PRIORITY_LOWEST;
else
new_prio = GetThreadPriority (hMainThread);
if (curr_prio != new_prio)
/* Force any threads in normal priority to be scheduled */
SetThreadPriority (thisthread, new_prio);
Sleep (secs);
if (!staylow || curr_prio == new_prio)
SetThreadPriority (thisthread, curr_prio);
}
return curr_prio;
}
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