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#include "woe32.h" |
#include "woe32.h" |
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#include <stdio.h> |
#include <stdio.h> |
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#include <conio.h> |
#include <assert.h> |
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#include <errno.h> |
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#include <sys/socket.h> /* This does: #include <windows.h> */ |
#include <sys/socket.h> /* This does: #include <windows.h> */ |
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/*============================================================================*/ |
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/* |
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How Microsoft does fd_set in Windows 2000 and Visual C++ 6.0: |
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* Select uses arrays of SOCKETs. These macros manipulate such |
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* arrays. FD_SETSIZE may be defined by the user before including |
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* this file, but the default here should be >= 64. |
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* |
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* CAVEAT IMPLEMENTOR and USER: THESE MACROS AND TYPES MUST BE |
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* INCLUDED IN WINSOCK2.H EXACTLY AS SHOWN HERE. |
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#ifndef FD_SETSIZE |
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#define FD_SETSIZE 64 |
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#endif |
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typedef struct fd_set { |
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u_int fd_count; |
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SOCKET fd_array[FD_SETSIZE]; |
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} fd_set; |
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Microsoft packs all handles between fd_array[0] and fd_array[fd_count-1] |
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*/ |
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typedef struct |
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{ |
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int is_ready; |
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SOCKET crt; |
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DWORD type; |
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union |
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{ |
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long osf; |
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HANDLE w32; |
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}; |
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} woe32_handle_set; |
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typedef struct |
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{ |
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u_int ready_count, used_count; |
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woe32_handle_set handle[ FD_SETSIZE ]; |
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} woe32_select_set; |
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static int woe32_select_set_fini (woe32_select_set * w32_set, fd_set * crt_set) |
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{ |
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FD_ZERO (crt_set); |
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if (w32_set->ready_count) |
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{ |
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u_int index; |
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woe32_handle_set * handle; |
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index = 0; |
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handle = w32_set->handle; |
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while (index < w32_set->used_count) |
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{ |
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if (handle->is_ready) |
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{ |
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FD_SET (handle->crt, crt_set); |
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} |
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++index; |
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++handle; |
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} |
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} |
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return w32_set->ready_count; |
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} |
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static int woe32_select_set_init (woe32_select_set * w32_set, fd_set * crt_set) |
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{ |
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u_int index; |
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DWORD dwBytesAvail; |
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woe32_handle_set * handle; |
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w32_set->ready_count = w32_set->used_count = index = 0; |
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handle = w32_set->handle; |
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if (crt_set) while (index < crt_set->fd_count) |
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{ |
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handle->crt = crt_set->fd_array[index]; |
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handle->osf = _get_osfhandle (handle->crt); |
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if (handle->w32 == INVALID_HANDLE_VALUE) |
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{ |
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errno = EBADF; |
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return -1; |
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} |
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handle->type = GetFileType (handle->w32); |
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switch (handle->type) |
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{ |
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case FILE_TYPE_DISK: |
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w32_set->ready_count += handle->is_ready = 1; |
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break; |
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case FILE_TYPE_PIPE: |
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if ( PeekNamedPipe (handle->w32, NULL, 0, NULL, &dwBytesAvail, NULL) ) |
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{ |
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w32_set->ready_count += handle->is_ready = dwBytesAvail > 0; |
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} |
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else |
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{ |
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errno = EBADF; |
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return -1; |
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} |
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break; |
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case FILE_TYPE_CHAR: |
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case FILE_TYPE_REMOTE: |
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case FILE_TYPE_UNKNOWN: |
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default: |
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errno = EBADF; |
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return -1; |
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} |
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++index; |
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++handle; |
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} |
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w32_set->used_count = index; |
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while (index < FD_SETSIZE) |
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{ |
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handle->crt = -1; |
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handle->w32 = INVALID_HANDLE_VALUE; |
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handle->type = FILE_TYPE_UNKNOWN; |
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handle->is_ready = 0; |
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++index; |
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++handle; |
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} |
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return w32_set->ready_count; |
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} |
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static int woe32_select_set_wait (woe32_select_set * w32_set) |
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{ |
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char buffer[ 8 ]; |
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DWORD dwBytesRead; |
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/* set contains only non-ready pipes */ |
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if (w32_set->used_count != 1) |
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{ |
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errno = EINVAL; |
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return -1; |
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} |
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if (! ReadFile (w32_set->handle[0].w32, buffer, 0, &dwBytesRead, NULL)) |
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{ |
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errno = EBADF; |
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return -1; |
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} |
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return w32_set->handle[0].is_ready = 1; |
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} |
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/* #define fd_select woe32_fd_select */ |
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#undef fd_select |
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int woe32_fd_select ( int nfds, |
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struct fd_set * readfds, |
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struct fd_set * writefds, |
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struct fd_set * errorfds, |
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struct timeval * timeout) |
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{ |
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int ready_fds; |
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woe32_select_set woe32_rset; |
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/* we don't support these for now */ |
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assert(writefds != NULL); |
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assert(errorfds != NULL); |
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assert(timeout != NULL); |
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/* Windows doesn't care but POSIX says it does */ |
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if (nfds < 0 || nfds > FD_SETSIZE) |
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{ |
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errno = EINVAL; |
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return -1; |
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} |
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ready_fds = woe32_select_set_init (&woe32_rset, readfds); |
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if (! ready_fds) |
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{ |
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ready_fds = woe32_select_set_wait (&woe32_rset); |
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} |
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if (ready_fds >= 0) |
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{ |
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woe32_select_set_fini (&woe32_rset, readfds); |
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} |
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return ready_fds; |
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} |
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/*============================================================================*/ |
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char * |
char * |
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woe32_getlogin (void) |
woe32_getlogin (void) |
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{ |
{ |