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Windows-Server-2003/sdktools/list/list.c

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Initiall commit
2024-08-04 01:28:15 +02:00
/*** List.c
*
*/
#include <stdio.h>
#include <malloc.h>
#include <string.h>
#include <stdlib.h>
#include <windows.h>
#include "list.h"
#include "..\he\hexedit.h"
BOOL IsValidKey (PINPUT_RECORD pRecord);
void DumpFileInHex (void);
static char Name[] = "Ken Reneris. List Ver 1.0.";
struct Block *vpHead = NULL; /* Current first block */
struct Block *vpTail = NULL; /* Current last block */
struct Block *vpCur = NULL; /* Current block for display 1st line */
/* (used by read ahead to sense) */
struct Block *vpBCache = NULL; /* 'free' blocks which can cache reads */
struct Block *vpBOther = NULL; /* (above) + for other files */
struct Block *vpBFree = NULL; /* free blocks. not valid for caching reads */
int vCntBlks; /* No of blocks currently is use by cur file*/
int vAllocBlks = 0; /* No of blocks currently alloced */
int vMaxBlks = MINBLKS; /* Max blocks allowed to alloc */
long vThreshold = MINTHRES*BLOCKSIZE; /* Min bytes before read ahead */
HANDLE vSemBrief = 0L; /* To serialize access to Linked list info */
HANDLE vSemReader = 0L; /* To wakeup reader thread when threshold */
HANDLE vSemMoreData = 0L; /* Blocker for Disp thread if ahead of read */
HANDLE vSemSync = 0L; /* Used to syncronize to sync to the reader */
USHORT vReadPriNormal; /* Normal priority for reader thread */
unsigned vReadPriBoost; /* Boosted priority for reader thread */
char vReaderFlag; /* Insructions to reader */
HANDLE vFhandle = 0; /* Current file handle */
long vCurOffset; /* Current offset in file */
char vpFname [40]; /* Current files name */
struct Flist *vpFlCur =NULL; /* Current file */
USHORT vFType; /* Current files handle type */
DWORD vFSize; /* Current file size */
char vDate [30]; /* Printable dat of current file */
char vSearchString [50]; /* Searching for this string */
char vStatCode; /* Codes for search */
long vHighTop = -1L; /* Current topline of hightlighting */
int vHighLen; /* Current bottom line of hightlighting */
char vHLTop = 0; /* Last top line displayed as highlighted */
char vHLBot = 0; /* Last bottom line displayed as highlighed */
char vLastBar; /* Last line for thumb mark */
int vMouHandle; /* Mouse handle (for Mou Apis) */
HANDLE vhConsoleOutput; // Handle to the console
char *vpOrigScreen; /* Orinal screen contents */
int vOrigSize; /* # of bytes in orignal screen */
USHORT vVioOrigRow = 0; /* Save orignal screen stuff. */
USHORT vVioOrigCol = 0;
int vSetBlks = 0; /* Used to set INI value */
long vSetThres = 0L; /* Used to set INI value */
int vSetLines; /* Used to set INI value */
int vSetWidth; /* Used to set INI value */
CONSOLE_SCREEN_BUFFER_INFO vConsoleCurScrBufferInfo;
CONSOLE_SCREEN_BUFFER_INFO vConsoleOrigScrBufferInfo;
/* Screen controling... used to be static in ldisp.c */
char vcntScrLock = 0; /* Locked screen count */
char vSpLockFlag = 0; /* Special locked flag */
HANDLE vSemLock = 0; /* To access vcntScrLock */
char vUpdate;
int vLines = 23; /* CRTs no of lines */
int vWidth = 80; /* CRTs width */
int vCurLine; /* When processing lines on CRT */
Uchar vWrap = 254; /* # of chars to wrap at */
Uchar vIndent = 0; /* # of chars dispaly is indented */
Uchar vDisTab = 8; /* # of chars per tab stop */
Uchar vIniFlag = 0; /* Various ini bits */
Uchar vrgLen [MAXLINES]; /* Last len of data on each line */
Uchar vrgNewLen[MAXLINES]; /* Temp moved to DS for speed */
char *vScrBuf; /* Ram to build screen into */
ULONG vSizeScrBuf;
int vOffTop; /* Offset into data for top line */
unsigned vScrMass = 0; /* # of bytes for last screen (used for %) */
struct Block *vpBlockTop; /* Block for start of screen (dis.asm) overw*/
struct Block *vpCalcBlock; /* Block for start of screen */
long vTopLine = 0L; /* Top line on the display */
#define FOREGROUND_WHITE (FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE)
#define BACKGROUND_WHITE (BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE)
#define HIWHITE_ON_BLUE (BACKGROUND_BLUE | FOREGROUND_WHITE | FOREGROUND_INTENSITY)
WORD vAttrTitle = HIWHITE_ON_BLUE;
WORD vAttrList = BACKGROUND_BLUE | FOREGROUND_WHITE;
WORD vAttrHigh = BACKGROUND_WHITE | FOREGROUND_BLUE;
WORD vAttrKey = HIWHITE_ON_BLUE;
WORD vAttrCmd = BACKGROUND_BLUE | FOREGROUND_WHITE;
WORD vAttrBar = BACKGROUND_BLUE | FOREGROUND_WHITE;
WORD vSaveAttrTitle = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
WORD vSaveAttrList = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
WORD vSaveAttrHigh = BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE;
WORD vSaveAttrKey = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
WORD vSaveAttrCmd = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
WORD vSaveAttrBar = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
char vChar; /* Scratch area */
char *vpReaderStack; /* Readers stack */
long vDirOffset; /* Direct offset to seek to */
/* table */
long vLastLine; /* Absolute last line */
long vNLine; /* Next line to process into line table */
long *vprgLineTable [MAXTPAGE]; /* Number of pages for line table */
HANDLE vStdOut;
HANDLE vStdIn;
char MEMERR[]= "Malloc failed. Out of memory?";
void __cdecl
main (
int argc,
char **argv
)
{
void usage (void);
char *pt;
DWORD dwMode;
if (argc < 2)
usage ();
while (--argc) {
++argv;
if (*argv[0] != '-' && *argv[0] != '/') {
AddFileToList (*argv);
continue;
}
pt = (*argv) + 2;
if (*pt == ':') pt++;
switch ((*argv)[1]) {
case 'g': // Goto line #
case 'G':
if (!atol (pt))
usage ();
vIniFlag |= I_GOTO;
vHighTop = atol (pt);
vHighLen = 0;
break;
case 's': // Search for string
case 'S':
vIniFlag |= I_SEARCH;
strncpy (vSearchString, pt, 40);
vSearchString[39] = 0;
vStatCode |= S_NEXT | S_NOCASE;
InitSearchReMap ();
break;
default:
usage ();
}
}
if ((vIniFlag & I_GOTO) && (vIniFlag & I_SEARCH))
usage ();
if (!vpFlCur)
usage ();
while (vpFlCur->prev)
vpFlCur = vpFlCur->prev;
strcpy (vpFname, vpFlCur->rootname);
vSemBrief = CreateEvent( NULL,
MANUAL_RESET,
SIGNALED,NULL );
vSemReader = CreateEvent( NULL,
MANUAL_RESET,
SIGNALED,NULL );
vSemMoreData = CreateEvent( NULL,
MANUAL_RESET,
SIGNALED,NULL );
vSemSync = CreateEvent( NULL,
MANUAL_RESET,
SIGNALED,NULL );
vSemLock = CreateEvent( NULL,
MANUAL_RESET,
SIGNALED,NULL );
if( !(vSemBrief && vSemReader &&vSemMoreData && vSemSync && vSemLock) ) {
printf("Couldn't create events \n");
ExitProcess (0); // Have to put an error message here
}
vhConsoleOutput = CreateConsoleScreenBuffer(GENERIC_WRITE | GENERIC_READ,
FILE_SHARE_WRITE | FILE_SHARE_READ,
NULL,
CONSOLE_TEXTMODE_BUFFER,
NULL );
if( vhConsoleOutput == (HANDLE)(-1) ) {
printf( "Couldn't create handle to console output \n" );
ExitProcess (0);
}
vStdIn = GetStdHandle( STD_INPUT_HANDLE );
GetConsoleMode( vStdIn, &dwMode );
SetConsoleMode( vStdIn, dwMode | ENABLE_ECHO_INPUT | ENABLE_MOUSE_INPUT | ENABLE_WINDOW_INPUT );
vStdOut = GetStdHandle( STD_OUTPUT_HANDLE );
init_list ();
vUpdate = U_NMODE;
if (vIniFlag & I_SEARCH)
FindString ();
if (vIniFlag & I_GOTO)
GoToMark ();
main_loop ();
}
void
usage (
void
)
{
puts ("list [-s:string] [-g:line#] filename, ...");
CleanUp();
ExitProcess(0);
}
/*** main_loop
*
*/
void
main_loop ()
{
int i;
int ccnt = 0;
char SkipCnt=0;
WORD RepeatCnt=0;
INPUT_RECORD InpBuffer;
DWORD cEvents;
BOOL bSuccess;
BOOL bKeyDown = FALSE;
for (; ;) {
if (RepeatCnt <= 1) {
if (vUpdate != U_NONE) {
if (SkipCnt++ > 5) {
SkipCnt = 0;
SetUpdate (U_NONE);
} else {
cEvents = 0;
bSuccess = PeekConsoleInput( vStdIn,
&InpBuffer,
1,
&cEvents );
if (!bSuccess || cEvents == 0) {
PerformUpdate ();
continue;
}
}
}
// there's either a charactor available from peek, or vUpdate is U_NONE
bSuccess = ReadConsoleInput( vStdIn,
&InpBuffer,
1,
&cEvents );
if (InpBuffer.EventType != KEY_EVENT) {
// TCHAR s[1024];
switch (InpBuffer.EventType) {
#if 0
case WINDOW_BUFFER_SIZE_EVENT:
sprintf (s,
"WindowSz X=%d, Y=%d",
InpBuffer.Event.WindowBufferSizeEvent.dwSize.X,
InpBuffer.Event.WindowBufferSizeEvent.dwSize.Y );
DisLn (20, (Uchar)(vLines+1), s);
break;
#endif
case MOUSE_EVENT:
#if 0
sprintf (s,
"Mouse (%d,%d), state %x, event %x",
InpBuffer.Event.MouseEvent.dwMousePosition.X,
InpBuffer.Event.MouseEvent.dwMousePosition.Y,
InpBuffer.Event.MouseEvent.dwButtonState,
InpBuffer.Event.MouseEvent.dwEventFlags );
#endif
if (InpBuffer.Event.MouseEvent.dwEventFlags == MOUSE_WHEELED)
{
// HiWord of ButtonState is signed int, in increments of 120 (WHEEL_DELTA).
// Map each 'detent' to a 4 line scroll in the console window.
// Rolling away from the user should scroll up (dLines should be negative).
// Since rolling away generates a positive dwButtonState, the negative sign
// makes rolling away scroll up, and rolling towards you scroll down.
SHORT dLines = -(SHORT)(HIWORD(InpBuffer.Event.MouseEvent.dwButtonState)) / (WHEEL_DELTA / 4);
vTopLine += dLines;
// make sure to stay between line 0 and vLastLine
if (vTopLine+vLines > vLastLine)
vTopLine = vLastLine-vLines;
if (vTopLine < 0)
vTopLine = 0;
SetUpdateM (U_ALL);
}
// DisLn (20, (Uchar)(vLines+1), s);
break;
default:
#if 0
sprintf (s, "Unkown event %d", InpBuffer.EventType);
DisLn (20, (Uchar)(vLines+1), s);
#endif
break;
}
continue;
}
if (!InpBuffer.Event.KeyEvent.bKeyDown)
continue; // don't move on upstrokes
if (!IsValidKey( &InpBuffer ))
continue;
RepeatCnt = InpBuffer.Event.KeyEvent.wRepeatCount;
if (RepeatCnt > 20)
RepeatCnt = 20;
} else
RepeatCnt--;
// First check for a known scan code
switch (InpBuffer.Event.KeyEvent.wVirtualKeyCode) {
case 0x21: /* PgUp */
if (InpBuffer.Event.KeyEvent.dwControlKeyState & // shift up
SHIFT_PRESSED ) {
HPgUp ();
}
else if (InpBuffer.Event.KeyEvent.dwControlKeyState & // ctrl up
( RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED ) ) {
if (NextFile (-1, NULL)) {
vStatCode |= S_UPDATE;
SetUpdate (U_ALL);
}
}
else {
if (vTopLine != 0L) {
vTopLine -= vLines-1;
if (vTopLine < 0L)
vTopLine = 0L;
SetUpdateM (U_ALL);
}
}
continue;
case 0x26: /* Up */
if (InpBuffer.Event.KeyEvent.dwControlKeyState & // shift or ctrl up
( RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED |
SHIFT_PRESSED ) ) {
HUp ();
}
else { // Up
if (vTopLine != 0L) {
vTopLine--;
SetUpdateM (U_ALL);
}
}
continue;
case 0x22: /* PgDn */
if (InpBuffer.Event.KeyEvent.dwControlKeyState & // shift down
SHIFT_PRESSED ) {
HPgDn ();
}
else if (InpBuffer.Event.KeyEvent.dwControlKeyState & // next file
( RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED ) ) {
if (NextFile (+1, NULL)) {
vStatCode |= S_UPDATE;
SetUpdate (U_ALL);
}
}
else { // PgDn
if (vTopLine+vLines < vLastLine) {
vTopLine += vLines-1;
if (vTopLine+vLines > vLastLine)
vTopLine = vLastLine - vLines;
SetUpdateM (U_ALL);
}
}
continue;
case 0x28: /* Down */
if (InpBuffer.Event.KeyEvent.dwControlKeyState & // shift or ctrl down
( RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED |
SHIFT_PRESSED ) ) {
HDn ();
}
else { // Down
if (vTopLine+vLines < vLastLine) {
vTopLine++;
SetUpdateM (U_ALL);
}
}
continue;
case 0x25: /* Left */
if (vIndent == 0)
continue;
vIndent = (Uchar)(vIndent < vDisTab ? 0 : vIndent - vDisTab);
SetUpdateM (U_ALL);
continue;
case 0x27: /* Right */
if (vIndent >= (Uchar)(254-vWidth))
continue;
vIndent += vDisTab;
SetUpdateM (U_ALL);
continue;
case 0x24: /* HOME */
if (InpBuffer.Event.KeyEvent.dwControlKeyState & // shift or ctrl home
( RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED |
SHIFT_PRESSED ) ) {
HSUp ();
}
else {
if (vTopLine != 0L) {
QuickHome ();
SetUpdate (U_ALL);
}
}
continue;
case 0x23: /* END */
if (InpBuffer.Event.KeyEvent.dwControlKeyState & // shift or ctrl end
( RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED |
SHIFT_PRESSED ) ) {
HSDn ();
}
else {
if (vTopLine+vLines < vLastLine) {
QuickEnd ();
SetUpdate (U_ALL);
}
}
continue;
case 0x72: /* F3 */
FindString ();
SetUpdate (U_ALL);
continue;
case 0x73: /* F4 */
vStatCode = (char)((vStatCode^S_MFILE) | S_UPDATE);
vDate[ST_SEARCH] = (char)(vStatCode & S_MFILE ? '*' : ' ');
SetUpdate (U_HEAD);
continue;
case 69:
if (InpBuffer.Event.KeyEvent.dwControlKeyState & // ALT-E
( RIGHT_ALT_PRESSED | LEFT_ALT_PRESSED ) ) {
i = vLines <= 41 ? 25 : 43;
if (set_mode (i, 0, 0))
SetUpdate (U_NMODE);
}
continue;
case 86: // ALT-V
if (InpBuffer.Event.KeyEvent.dwControlKeyState &
( RIGHT_ALT_PRESSED | LEFT_ALT_PRESSED ) ) {
i = vLines >= 48 ? 25 : 60;
if (set_mode (i, 0, 0))
{
SetUpdate (U_NMODE);
continue;
}
if (i == 60)
if (set_mode (50, 0, 0))
SetUpdate (U_NMODE);
}
continue;
case 0x70: /* F1 */
ShowHelp ();
SetUpdate (U_NMODE);
continue;
case 24: /* Offset */
if (!(vIniFlag & I_SLIME))
continue;
SlimeTOF ();
SetUpdate (U_ALL);
continue;
case 0x77: // F8
case 0x1b: // ESC
case 0x51: // Q or q
CleanUp();
ExitProcess(0);
}
// Now check for a known char code...
switch (InpBuffer.Event.KeyEvent.uChar.AsciiChar) {
case '?':
ShowHelp ();
SetUpdate (U_NMODE);
continue;
case '/':
vStatCode = (char)((vStatCode & ~S_NOCASE) | S_NEXT);
GetSearchString ();
FindString ();
continue;
case '\\':
vStatCode |= S_NEXT | S_NOCASE;
GetSearchString ();
FindString ();
continue;
case 'n':
vStatCode = (char)((vStatCode & ~S_PREV) | S_NEXT);
FindString ();
continue;
case 'N':
vStatCode = (char)((vStatCode & ~S_NEXT) | S_PREV);
FindString ();
continue;
case 'c':
case 'C': /* Clear marked line */
UpdateHighClear ();
continue;
case 'j':
case 'J': /* Jump to marked line */
GoToMark ();
continue;
case 'g':
case 'G': /* Goto line # */
GoToLine ();
SetUpdate (U_ALL);
continue;
case 'm': /* Mark line or Mono */
case 'M':
if (InpBuffer.Event.KeyEvent.dwControlKeyState & // ALT-M
( RIGHT_ALT_PRESSED | LEFT_ALT_PRESSED ) ) {
i = set_mode (vSetLines, vSetWidth, 1);
if (!i)
i = set_mode (0, 0, 1);
if (!i)
i = set_mode (25, 80, 1);
if (i)
SetUpdate (U_NMODE);
}
else {
MarkSpot ();
}
continue;
case 'p': /* Paste buffer to file */
case 'P':
FileHighLighted ();
continue;
case 'f': /* get a new file */
case 'F':
if (GetNewFile ())
if (NextFile (+1, NULL))
SetUpdate (U_ALL);
continue;
case 'h': /* hexedit */
case 'H':
DumpFileInHex();
SetUpdate (U_NMODE);
continue;
case 'w': /* WRAP */
case 'W':
ToggleWrap ();
SetUpdate (U_ALL);
continue;
case 'l': /* REFRESH */
case 'L': /* REFRESH */
if (InpBuffer.Event.KeyEvent.dwControlKeyState & // ctrl L
( RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED ) ) {
SetUpdate (U_NMODE);
}
continue;
case '\r': /* ENTER*/
SetUpdate (U_HEAD);
continue;
default:
continue;
}
} /* Forever loop */
}
void
SetUpdate(
int i
)
{
while (vUpdate>(char)i)
PerformUpdate ();
vUpdate=(char)i;
}
void
PerformUpdate (
)
{
if (vUpdate == U_NONE)
return;
if (vSpLockFlag == 0) {
vSpLockFlag = 1;
ScrLock (1);
}
switch (vUpdate) {
case U_NMODE:
ClearScr ();
DisLn (0, 0, vpFname);
DrawBar ();
break;
case U_ALL:
Update_display ();
break;
case U_HEAD:
Update_head ();
break;
case U_CLEAR:
SpScrUnLock ();
break;
}
vUpdate --;
}
void
DumpFileInHex(
void
)
{
struct HexEditParm ei;
ULONG CurLine;
SyncReader ();
memset ((char *) &ei, 0, sizeof (ei));
ei.handle = CreateFile( vpFlCur->fname,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ|FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL );
if (ei.handle == INVALID_HANDLE_VALUE) {
ei.handle = CreateFile( vpFlCur->fname,
GENERIC_READ,
FILE_SHARE_READ|FILE_SHARE_WRITE,
NULL,
OPEN_EXISTING,
0,
NULL );
}
if (ei.handle == INVALID_HANDLE_VALUE) {
SetEvent (vSemReader);
return ;
}
//
// Save current settings for possible restore
//
vpFlCur->Wrap = vWrap;
vpFlCur->HighTop = vHighTop;
vpFlCur->HighLen = vHighLen;
vpFlCur->TopLine = vTopLine;
vpFlCur->Loffset = GetLoffset();
vpFlCur->LastLine = vLastLine;
vpFlCur->NLine = vNLine;
memcpy (vpFlCur->prgLineTable, vprgLineTable, sizeof (long *) * MAXTPAGE);
vFSize = 0;
setattr2 (0, 0, vWidth, (char)vAttrTitle);
//
// Setup for HexEdit call
//
if (vHighTop >= 0) { // If highlighted area,
CurLine = vHighTop; // use that for the HexEdit
if (vHighLen < 0) // location
CurLine += vHighLen;
} else {
CurLine = vTopLine;
}
ei.ename = vpFname;
ei.ioalign = 1;
ei.flag = FHE_VERIFYONCE;
ei.read = fncRead;
ei.write = fncWrite;
ei.start = vprgLineTable[CurLine/PLINES][CurLine%PLINES];
ei.totlen = SetFilePointer (ei.handle, 0, NULL, FILE_END);
ei.Console = vhConsoleOutput; // our console handle
ei.AttrNorm = vAttrList;
ei.AttrHigh = vAttrTitle;
ei.AttrReverse = vAttrHigh;
HexEdit (&ei);
CloseHandle (ei.handle);
//
// HexEdit is done, let reader and return to listing
//
vReaderFlag = F_NEXT; // re-open current file
// (in case it was editted)
SetEvent (vSemReader);
WaitForSingleObject(vSemMoreData, WAITFOREVER);
ResetEvent(vSemMoreData);
QuickRestore (); /* Get to the old location */
}
int
NextFile (
int dir,
struct Flist *pNewFile)
{
struct Flist *vpFLCur;
long *pLine;
vpFLCur = vpFlCur;
if (pNewFile == NULL) {
if (dir < 0) {
if (vpFlCur->prev == NULL) {
beep ();
return (0);
}
vpFlCur = vpFlCur->prev;
} else if (dir > 0) {
if (vpFlCur->next == NULL) {
beep ();
return (0);
}
vpFlCur = vpFlCur->next;
}
} else
vpFlCur = pNewFile;
SyncReader ();
/*
* Remove current file from list, if open error
* occured and we are moving off of it.
*/
if (vFSize == -1L && vpFLCur != vpFlCur) {
if (vpFLCur->prev)
vpFLCur->prev->next = vpFLCur->next;
if (vpFLCur->next)
vpFLCur->next->prev = vpFLCur->prev;
FreePages (vpFLCur);
free ((char*) vpFLCur->fname);
free ((char*) vpFLCur->rootname);
free ((char*) vpFLCur);
} else {
/*
* Else, save current status for possible restore
*/
vpFLCur->Wrap = vWrap;
vpFLCur->HighTop = vHighTop;
vpFLCur->HighLen = vHighLen;
vpFLCur->TopLine = vTopLine;
vpFLCur->Loffset = GetLoffset();
vpFLCur->LastLine = vLastLine;
vpFLCur->NLine = vNLine;
memcpy (vpFLCur->prgLineTable, vprgLineTable, sizeof (long *) * MAXTPAGE);
if (vLastLine == NOLASTLINE) {
pLine = vprgLineTable [vNLine/PLINES] + vNLine % PLINES;
}
}
vFSize = 0;
setattr2 (0, 0, vWidth, (char)vAttrTitle);
vHighTop = -1L;
UpdateHighClear ();
vHighTop = vpFlCur->HighTop;
vHighLen = vpFlCur->HighLen;
strcpy (vpFname, vpFlCur->rootname);
DisLn (0, 0, vpFname);
vReaderFlag = F_NEXT;
SetEvent (vSemReader);
WaitForSingleObject(vSemMoreData, WAITFOREVER);
ResetEvent(vSemMoreData);
if (pNewFile == NULL)
QuickRestore (); /* Get to the old location */
return (1);
}
void
ToggleWrap(
)
{
SyncReader ();
vWrap = (Uchar)(vWrap == (Uchar)(vWidth - 1) ? 254 : vWidth - 1);
vpFlCur->FileTime.dwLowDateTime = (unsigned)-1; /* Cause info to be invalid */
vpFlCur->FileTime.dwHighDateTime = (unsigned)-1; /* Cause info to be invalid */
FreePages (vpFlCur);
NextFile (0, NULL);
}
/*** QuickHome - Deciede which HOME method is better.
*
* Roll que backwards or reset it.
*
*/
void
QuickHome ()
{
vTopLine = 0L; /* Line we're after */
if (vpHead->offset >= BLOCKSIZE * 5) /* Reset is fastest */
QuickRestore ();
/* Else Read backwards */
vpCur = vpHead;
}
void
QuickEnd ()
{
vTopLine = 1L;
while (vLastLine == NOLASTLINE) {
if (_abort()) {
vTopLine = vNLine - 1;
return ;
}
fancy_percent ();
vpBlockTop = vpCur = vpTail;
vReaderFlag = F_DOWN;
ResetEvent (vSemMoreData);
SetEvent (vSemReader);
WaitForSingleObject(vSemMoreData, WAITFOREVER);
ResetEvent(vSemMoreData);
}
vTopLine = vLastLine - vLines;
if (vTopLine < 0L)
vTopLine = 0L;
QuickRestore ();
}
void
QuickRestore ()
{
long l;
long indx1 = vTopLine/PLINES;
long indx2 = vTopLine%PLINES;
SyncReader ();
if(indx1 < MAXTPAGE) {
l = vprgLineTable[indx1][indx2];
} else {
puts("Sorry, This file is too big for LIST to handle. MAXTPAGE limit exceeded\n");
CleanUp();
ExitProcess(0);
}
if ((l >= vpHead->offset) &&
(l <= vpTail->offset + BLOCKSIZE))
{
vReaderFlag = F_CHECK; /* Jump location is alread in */
/* memory. */
SetEvent (vSemReader);
return ;
}
/* Command read for direct placement */
vDirOffset = (long) l - l % ((long)BLOCKSIZE);
vReaderFlag = F_DIRECT;
SetEvent (vSemReader);
WaitForSingleObject(vSemMoreData, WAITFOREVER);
ResetEvent(vSemMoreData);
}
/*** InfoRead - return on/off depending if screen area is in memory
*
* Also sets some external value to prepair for the screens printing
*
* Should be modified to be smarter about one line movements.
*
*/
int
InfoReady(
void
)
{
struct Block *pBlock;
LONG *pLine;
long foffset, boffset;
int index, i, j;
/*
* Check that first line has been calced
*/
if (vTopLine >= vNLine) {
if (vTopLine+vLines > vLastLine) /* BUGFIX. TopLine can */
vTopLine = vLastLine - vLines; /* get past EOF. */
vReaderFlag = F_DOWN;
return (0);
}
pLine = vprgLineTable [(int)vTopLine / PLINES];
index = (int)(vTopLine % PLINES);
foffset = *(pLine+=index);
/*
* Check that last line has been calced
*/
if (vTopLine + (i = vLines) > vLastLine) {
i = (int)(vLastLine - vTopLine + 1);
for (j=i; j < vLines; j++) /* Clear ending len */
vrgNewLen[j] = 0;
}
if (vTopLine + i > vNLine) {
vReaderFlag = F_DOWN;
return (0);
}
/*
* Put this loop in assembler.. For more speed
* boffset = calc_lens (foffset, i, pLine, index);
*/
boffset = foffset;
for (j=0; j < i; j++) { /* Calc new line len*/
pLine++;
if (++index >= PLINES) {
index = 0;
pLine = vprgLineTable [vTopLine / PLINES + 1];
}
boffset += (long)((vrgNewLen[j] = (Uchar)(*pLine - boffset)));
}
vScrMass = (unsigned)(boffset - foffset);
/*
* Check for both ends of display in memory
*/
pBlock = vpCur;
if (pBlock->offset <= foffset) {
while (pBlock->offset + BLOCKSIZE <= foffset)
if ( (pBlock = pBlock->next) == NULL) {
vReaderFlag = F_DOWN;
return (0);
}
vOffTop = (int)(foffset - pBlock->offset);
vpBlockTop = vpCalcBlock = pBlock;
while (pBlock->offset + BLOCKSIZE <= boffset)
if ( (pBlock = pBlock->next) == NULL) {
vReaderFlag = F_DOWN;
return (0);
}
if (vpCur != pBlock) {
vpCur = pBlock;
vReaderFlag = F_CHECK;
SetEvent (vSemReader);
}
return (1);
} else {
while (pBlock->offset > foffset)
if ( (pBlock = pBlock->prev) == NULL) {
vReaderFlag = F_UP;
return (0);
}
vOffTop = (int)(foffset - pBlock->offset);
vpBlockTop = vpCalcBlock = pBlock;
while (pBlock->offset + BLOCKSIZE <= boffset)
if ( (pBlock = pBlock->next) == NULL) {
vReaderFlag = F_DOWN;
return (0);
}
if (vpCur != pBlock) {
vpCur = pBlock;
vReaderFlag = F_CHECK;
SetEvent (vSemReader);
}
return (1);
}
}
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