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io.c

/*$Header: /p/tcsh/cvsroot/tcsh/win32/io.c,v 1.9 2006/04/13 00:59:02 amold Exp $*/
/*-
 * Copyright (c) 1980, 1991 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * io.c
 * wrapper functions for some i/o routines.
 * -amol
 *
 */
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#include <stdio.h>
#include <fcntl.h>
#include <memory.h>
#include <errno.h>
#include "sh.h"
#include "ntport.h"
#include "signal.h"


#pragma warning(disable:4127) //conditional expr is constant

#define CR 0x0d


extern void make_err_str(unsigned int ,char *,int ) ;
extern void generic_handler(int);
extern int console_write(HANDLE,unsigned char*,int);

int consoleread(HANDLE , unsigned char * ,size_t ) ;

INPUT_RECORD girec[2048];

unsigned short __nt_want_vcode=0,__nt_vcode=0;
HANDLE __h_con_alarm=0;
HANDLE __h_con_int=0;
HANDLE __h_con_hup=0;

extern int NoNLSRebind;

extern int OLDSTD, SHIN;
/* 
 * force_read: Forces a ReadFile, instead of ReadConsole 
 *
 */
int force_read(int fd, unsigned char * buf, size_t howmany) {
    DWORD numread=0,err=0;
    HANDLE hRead ;


    hRead= (HANDLE)__nt_get_osfhandle(fd);
    if (hRead == INVALID_HANDLE_VALUE) {
      return 0;
    }
again:
    if (!ReadFile(hRead, buf,(DWORD)howmany,&numread, NULL ) ){
      err = GetLastError();
      switch(err) {
          case ERROR_IO_PENDING:
            break;
          case ERROR_ACCESS_DENIED:
          case ERROR_INVALID_HANDLE:
            errno = EBADF;
            return -1;
            break;
          case ERROR_HANDLE_EOF:
          case ERROR_BROKEN_PIPE:
            errno = 0;
            return 0;
          default:
            errno = EBADF;
            return 0;
      }
    }
    if (numread == 1 && buf[0] == CR)
      goto again;
    return numread;
}
int nt_read(int fd, unsigned char * buf, size_t howmany) {

    DWORD numread=0,err=0;
    HANDLE hRead ;
    DWORD ftype;
    //

    hRead= (HANDLE)__nt_get_osfhandle(fd);
    if (hRead == INVALID_HANDLE_VALUE) {
      return 0;
    }

    ftype = GetFileType(hRead);


    if ((ftype == FILE_TYPE_CHAR) /*&& (fd != OLDSTD) && (fd != SHIN)*/)
      return consoleread(hRead,buf,howmany);
again:
    if (!ReadFile(hRead, buf,(DWORD)howmany,&numread, NULL ) ){
      err = GetLastError();
      switch(err) {
          case ERROR_IO_PENDING:
            break;
          case ERROR_ACCESS_DENIED:
          case ERROR_INVALID_HANDLE:
            errno = EBADF;
            return -1;
            break;
          case ERROR_HANDLE_EOF:
          case ERROR_BROKEN_PIPE:
            errno = 0;
            return 0;
          default:
            errno = EBADF;
            return 0;
      }
    }
    if (numread) {
      if (buf[numread-1] == CR) 
          numread--;
      if (numread == 0)
          goto again;
    }
    return numread;
}

/* color-ls patches from TAGA nayuta (nayuta@is.s.u-tokyo.ac.jp) */
#ifdef COLOR_LS_F

int nt_write_(int , const unsigned char * , size_t );
int nt_write(int fd, const unsigned char * buf, size_t howmany) {
    static unsigned char color_buf[256];
    static char len = 0;

    ssize_t i;
    ssize_t start = 0;
    int rc,wrote = 0;

    if (!isatty(fd) || (varval(STRcolor) == NULL))
      return nt_write_(fd, buf, howmany);

    for (i = 0; i < howmany; i++) {
      switch (len) {
          case 0:
            if (buf[i] == '\x1b') {
                color_buf[len++] = buf[i];
                if (0 < i - start){
                  if ((rc=nt_write_(fd, &(buf[start]), i - start)) <0)
                      return -1;
                  else
                      wrote += rc;
                }
                start = -1;
            }
            break;

          case 1:
            if (buf[i] != '[')
                goto set_color;
            color_buf[len++] = buf[i];
            break;

          default:
            if (buf[i] == 'm' || (!isdigit(buf[i]) && buf[i] != ';'))
                goto set_color;
            color_buf[len++] = buf[i];
            break;

          case sizeof(color_buf) - 1:
set_color:
            color_buf[len] = '\0';
            set_attributes(color_buf);
            len = 0;
            start = i + 1;
            break;
      }
    }

    if (0 < i - start && 0 <= start) {
      if ((rc=nt_write_(fd, &(buf[start]), i - start)) < 0)
          return -1;
      else
          wrote += rc;
    }
    return wrote;
}
int nt_write_(int fd, const unsigned char * buf, size_t howmany)
#else /* if !COLOR_LS_F */
int nt_write(int fd, const unsigned char * buf, size_t howmany)
#endif /* COLOR_LS_F */
{
    int bytes_rtn,err;
    HANDLE hout;


    hout = (HANDLE)__nt_get_osfhandle(fd);
    /*
       if (isatty(fd)) 
       ;//        return console_write(hout,buf,howmany);
     */

    if(!WriteFile(hout, buf,(DWORD)howmany,(ULONG*)&bytes_rtn,
            NULL)){
      err = GetLastError();
      switch(err) {
          case ERROR_ACCESS_DENIED:
          case ERROR_INVALID_HANDLE:
            errno = EBADF;
            return -1;
            break;
          case ERROR_BROKEN_PIPE:
            errno = EPIPE;
            return -1;
          default:
            errno = EBADF;
            return -1;
      }

    }
    return bytes_rtn?bytes_rtn:-1;

}

#define IS_CTRL_COMBO(a) ( (a) & ( RIGHT_CTRL_PRESSED |  LEFT_CTRL_PRESSED) ) 
#define IS_ALT_COMBO(a) ( /*(a) &*/ alt_pressed ) 
#define IS_SHIFT_COMBO(a) ( (a) & SHIFT_PRESSED)

int consoleread(HANDLE hInput, unsigned char * buf,size_t howmany) {

      INPUT_RECORD *irec = NULL;
      DWORD numread,controlkey,i;
      WORD vcode;
      unsigned char ch;
      int rc;
      size_t where=0;
      int alt_pressed = 0,memfree=0;
      HANDLE hevents[4];
      static int pre_ch = -1;

      if (0 <= pre_ch) {
            buf[0] = (unsigned char)pre_ch;
            pre_ch = -1;
            return 1;
      }

      howmany /= 2; // [ALT + KEY] is expanded ESC KEY, so we need more buffer
      if (howmany == 0)
            howmany = 1;

      if (howmany > 2048){
            irec = heap_alloc(howmany*sizeof(INPUT_RECORD));
            memfree=1;
      }
      else
            irec = &(girec[0]);
      if (!irec){
            errno = ENOMEM;
            return -1;
      }
      while(1) {
            hevents[0] = __h_con_alarm;
            hevents[1] = __h_con_int;
            hevents[2] = __h_con_hup;
            hevents[3] = hInput;
            rc = WaitForMultipleObjects(sizeof(hevents)/sizeof(hevents[0]),
                                  hevents,FALSE,INFINITE);
            if (rc == WAIT_OBJECT_0) {
                  generic_handler(SIGALRM);
            }
            if (rc == (WAIT_OBJECT_0 +1) ) {
                  errno = EINTR;
                  generic_handler(SIGINT);
                  break;
            }
            if (rc == (WAIT_OBJECT_0 +2) ) {
                  errno = EINTR;
                  generic_handler(SIGHUP);
                  break;
            }
            rc = ReadConsoleInput(hInput,irec,(DWORD)howmany,&numread);
            if (!rc) {
                  rc = GetLastError();
                  switch (rc) {
                        case ERROR_INVALID_HANDLE:
                        case ERROR_ACCESS_DENIED:
                              errno = EBADF;
                              break;
                  }
                  if (memfree)
                        heap_free(irec);
                  return -1;
            }
            __nt_vcode=0;
            for(i=0;i<numread;i++) {
                  switch(irec[i].EventType) {
                        case KEY_EVENT:
                              if (irec[i].Event.KeyEvent.bKeyDown) {
                                    vcode=(irec[i].Event.KeyEvent.wVirtualKeyCode);
                                    ch=(irec[i].Event.KeyEvent.uChar.AsciiChar);
                                    controlkey=(irec[i].Event.KeyEvent.dwControlKeyState);
                                    if (controlkey & LEFT_ALT_PRESSED)
                                          alt_pressed=1;
                                    else if (controlkey & RIGHT_ALT_PRESSED){
                                          if (NoNLSRebind)
                                                alt_pressed=1;
                                    }

                                    if (__nt_want_vcode != 1)
                                          goto skippy;

                                    if (vcode >= VK_F1 && vcode <= VK_F24) {

                                          __nt_vcode=NT_SPECIFIC_BINDING_OFFSET ;
                                          __nt_vcode += (vcode- VK_F1) + SINGLE_KEY_OFFSET;

                                          if (IS_CTRL_COMBO(controlkey))
                                                __nt_vcode += CTRL_KEY_OFFSET;

                                          else if (IS_ALT_COMBO(controlkey))
                                                __nt_vcode += ALT_KEY_OFFSET;
                                          else if (IS_SHIFT_COMBO(controlkey))
                                                __nt_vcode += SHIFT_KEY_OFFSET;

                                          __nt_want_vcode=2;

                                          return 1;
                                    }
                                    else if (vcode>= VK_PRIOR && vcode <= VK_DOWN) {

                                          __nt_vcode  = NT_SPECIFIC_BINDING_OFFSET ;
                                          __nt_vcode += KEYPAD_MAPPING_BEGIN;
                                          __nt_vcode += (vcode -VK_PRIOR);    

                                          __nt_vcode += SINGLE_KEY_OFFSET ;

                                          if (IS_CTRL_COMBO(controlkey))
                                                __nt_vcode += CTRL_KEY_OFFSET;

                                          else if (IS_ALT_COMBO(controlkey))
                                                __nt_vcode += ALT_KEY_OFFSET;
                                          else if (IS_SHIFT_COMBO(controlkey))
                                                __nt_vcode += SHIFT_KEY_OFFSET;

                                          __nt_want_vcode=2;
                                          return 1;
                                    }
                                    else if (vcode == VK_INSERT) {
                                          __nt_vcode  = NT_SPECIFIC_BINDING_OFFSET ;
                                          __nt_vcode += INS_DEL_MAPPING_BEGIN;

                                          if (IS_CTRL_COMBO(controlkey))
                                                __nt_vcode += CTRL_KEY_OFFSET;

                                          else if (IS_ALT_COMBO(controlkey))
                                                __nt_vcode += ALT_KEY_OFFSET;

                                          else if (IS_SHIFT_COMBO(controlkey))
                                                __nt_vcode += SHIFT_KEY_OFFSET;

                                          __nt_want_vcode=2;
                                          return 1;
                                    }
                                    else if (vcode == VK_DELETE) {
                                          __nt_vcode  = NT_SPECIFIC_BINDING_OFFSET ;
                                          __nt_vcode += INS_DEL_MAPPING_BEGIN + 1;

                                          if (IS_CTRL_COMBO(controlkey))
                                                __nt_vcode += CTRL_KEY_OFFSET;

                                          else if (IS_ALT_COMBO(controlkey))
                                                __nt_vcode += ALT_KEY_OFFSET;

                                          else if (IS_SHIFT_COMBO(controlkey))
                                                __nt_vcode += SHIFT_KEY_OFFSET;

                                          __nt_want_vcode=2;

                                          return 1;
                                    }
skippy:
                                    switch(vcode) {
                                          case VK_ESCAPE:
                                                buf[where++]='\033';
                                                break;
                                          default:
                                                if(ch ){
                                                      /* 
                                                       * Looks like win95 has a spurious
                                                       * newline left over
                                                       */
                                                      if (gdwPlatform ==
                                                                  VER_PLATFORM_WIN32_WINDOWS && 
                                                                  ch == '\r'){
                                                            DWORD bread;
                                                            (void)ReadFile(hInput,&ch,1,&bread,NULL);
                                                      }
                                                      /* patch from TAGA nayuta */
                                                      if ( NoNLSRebind  &&
                                                                  (ch == ' ' || ch == '@') &&
                                                                  IS_CTRL_COMBO(controlkey)
                                                                  /*(controlkey & LEFT_CTRL_PRESSED ||
                                                                    controlkey & RIGHT_CTRL_PRESSED)*/
                                                         )
                                                            ch = 0;
                                                      if (alt_pressed) {
#ifdef DSPMBYTE
                                                            buf[where++] = '\033';
                                                            if (howmany == 1)
                                                                  pre_ch = ch;
                                                            else
                                                                  buf[where++] = ch;
#else /* !DSPMBYTE */
                                                            buf[where++] = ch | 0200;
#endif /* !DSPMBYTE */
                                                      }
                                                      else
                                                            buf[where++] = ch;
                                                }
                                                break;
                                    }

                                    alt_pressed=0;
                              }
                              break;
                        default:
                              break;
                  }
            }
            if (where == 0)
                  continue;
            if (howmany < where) // avoid trashing memory. -amol 4/16/97
                  buf[where]=0;
            break;
      }
      if (memfree)
            heap_free(irec);
      if (!where)
            return -1;
      return (int)(where );
}
int console_write(HANDLE hout, unsigned char * buf,int howmany) {
    int bytes,rc;

    bytes = -1;

    rc = WriteConsole(hout,buf,howmany,(DWORD*)&bytes,NULL);
    if (!rc) {
      errno = EBADF;
      bytes = -1;
      rc = GetLastError();
    }

    return bytes;
}

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