From:	"Campbell, Rolf [SKY:1U32:EXCH]" <cp1v45 AT NortelNetworks DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Dosc Log
Date:	Wed, 25 Aug 1999 10:36:16 -0400
Organization:	Nortel Networks
Lines:	547
Message-ID:	<37C3FF60.9AC3B692@NortelNetworks.com>
NNTP-Posting-Host:	bmerhc00.ca.nortel.com
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

This is a multi-part message in MIME format.
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    Here's the Dosc Log (si) files and a simple checksum function.

--
     -Rolf Campbell (39)3-6318



--------------39487F263D904C57CA8F2F14
Content-Type: text/plain; charset=us-ascii;
 name="dosclogim.aa02"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
 filename="dosclogim.aa02"

SECTION DOSCLOGIM OF DOSCLOGSI;
/* EDITION AA02 (PEG00), UNXDEV PBEER.50 (99/07/21 21:59:00) -- OPEN */
// Time-stamp: <99/08/25 10:17:27 cp1v45>

#ifdef LOCAL_COMPILE
#include "dosclogsi.aa02"
#include <stdio.h>
unsigned si_RelTime;
#endif

/* Total number of logable messages */
#define PO_LOG_LINES  1000
/* Maximum usable size of each log message */
#define PO_LINE_WIDTH 80
/* Extra size used for timestamp */
#define PO_TIMESTAMP_WIDTH 12
/* The number of rows to display per page when in paging mode */
#define ROWS_IN_PAGE 20

/* The po log buffer. */
typedef struct {
  int  start;
  int  count;
  char text[PO_LOG_LINES+1][PO_LINE_WIDTH+PO_TIMESTAMP_WIDTH];
  /* '+1' so there can be 80 characters then the null */
  } PoLogBuffType;

/* This type specifies the destination of a log. */
typedef enum logDestinationType {
  toBuffer = 0,
  toScreen = 1
#ifdef LOCAL_COMPILE
  , toFile   = 2
#endif
  } LogDestination;

/* This is used to hold whether paging is on or off */
typedef enum {DOSC_OFF, DOSC_ON} OnOffType;

/* Scratch pad area. */
/* '*2' because people might write more than 80 characters. */
/* '+1' so there can be 160 characters and then the null */
char potxt[PO_LINE_WIDTH*2+1];

static PoLogBuffType poLogBuff;  /* The actual log */
static OnOffType pageMode;  /* Is paging on? */

static LogDestination logDestination;  /* Where to write each message */

#ifdef LOCAL_COMPILE
FILE* logFile = NULL;  /* The file to be used as a buffer if required */
#endif

/* These are used to hold which applications are blocked from sending
   messages */
static int blocked[DOSC_APP_TYPE_SIZE];
/* This is used to remember the old list of blocked apps when
   savePoBlockedApps is called */
static int blockedBackup[DOSC_APP_TYPE_SIZE];

#ifdef LOCAL_COMPILE
int main(void)
{
  int i, low, high;
  dosclogsi_entry();
  low=30;
  high=40;

  for(i=0; i<100; i++) {
    if(i==low) blockPoApp(DOSC_LINK);
    else if(i==high) unBlockPoApp(DOSC_LINK);
    sprintf(potxt, "I am #%d!  And I am really long!!!          Hi.   How are you????????", i);
    writePoLog(DOSC_LINK, potxt);
    }
  turnPoPagingOn();
  blockAllPoApps();
  if(printPoLogFromOffset(0)==FALSE)
    printf("Could not print because some signals are not blocked.\n");

  for(;;) {
    char* input;

    printf("PrintLog" "\t");
    printf("PagingOn" "\t");
    printf("PagingOff" "\t");
    printf("ClearLog" "\t");
    printf("SaveApps" "\t");
    printf("RestoreApps" "\t");
    printf("BlockAll" "\t");
    printf("UnBlockAll" "\t");
    printf("PrintFromOffset" "\t");
    printf("BlockAnApp" "\t");
    printf("UnBlockAnApp" "\t");
    printf("CurrentLogSize" "\t");
    printf("NewestMessages" "\n");
    input = MON_get_line();

    if(!strcmp(input, "PrintLog")) print_po_log();
    if(!strcmp(input, "PagingOn")) turnPoPagingOn();
    if(!strcmp(input, "PagingOff")) turnPoPagingOff();
    if(!strcmp(input, "ClearLog")) clear_po_log();
    if(!strcmp(input, "SaveApps")) savePoBlockedApps();
    if(!strcmp(input, "RestoreApps")) restorePoBlockedApps();
    if(!strcmp(input, "BlockAll")) blockAllPoApps();
    if(!strcmp(input, "UnBlockAll")) unBlockAllPoApps();
    if(!strcmp(input, "PrintFromOffset")) printFromOffset_interface();
    if(!strcmp(input, "BlockAnApp")) blockAnApp_interface();
    if(!strcmp(input, "UnBlockAnApp")) unBlockAnApp_interface();
    if(!strcmp(input, "CurrentLogSize")) currentBufferSize_interface();
    if(!strcmp(input, "NewestMessages")) printLastMessages_interface();

    }
  return 0;
  }
#endif

/* This function writes a string to the logDestination, if the sending app
   has not been blocked.  A time-stamp is prepended to the string.  If the
   buffer is full, then the oldest message is overwritten. */
void writePoLog(AppType app, char *text)
{
  if(blocked[app]) return; /* Do nothing if sending app is blocked */
  switch (logDestination) {
    case toScreen:
      /* Just output to the screen */
      printf("\n%010d: %s", si_RelTime, text);
      break;
    case toBuffer:
      /* Print the text string into the buffer preceded by the timestamp. */
      sprintf(poLogBuff.text[(poLogBuff.start + poLogBuff.count) % PO_LOG_LINES], "%010d: ", si_RelTime);
      strncat(poLogBuff.text[(poLogBuff.start + poLogBuff.count) % PO_LOG_LINES], text, 80);

      /* Adjust end to the next free position. */
      if(poLogBuff.count == PO_LOG_LINES)
        poLogBuff.start = (poLogBuff.start+1) % PO_LOG_LINES;
      else
        poLogBuff.count++;
      break;

#ifdef LOCAL_COMPILE
    case toFile:
      /* Just dump the log into the file. */
      fprintf(logFile, "\n%010d: %s", si_RelTime, text);
      break;
#endif

    default:
      break;
    }
  }

/* Enables displaying one page at a time */
void turnPoPagingOn(void)
{
  pageMode = DOSC_ON;
  }

/* Disables displaying one page at a time */
void turnPoPagingOff(void)
{
  pageMode = DOSC_OFF;
  }

/* Prints all of the entries in the buffer, skipping the first 'offset' entries. */
/* If paging is on, then after one page full, printing pauses and the user */
/* is prompted to press enter to display the next page. */
int printPoLogFromOffset(int offset)
{
  int i, ret=TRUE;

  if(offset>poLogBuff.count) offset=poLogBuff.count;

  if(pageMode==DOSC_OFF)
    for(i = 0; i<poLogBuff.count-offset; i++)
      printf("\n%s", poLogBuff.text[(poLogBuff.start+offset+i) % PO_LOG_LINES]);
  else {
    if(countUnblockedApps()>0) ret=FALSE;
    else {
      int numElements=poLogBuff.count-offset,
        linesPrinted=0;
      for(i=0; i<numElements; i++) {
        char* curString = poLogBuff.text[(i+offset+poLogBuff.start)%PO_LOG_LINES];
        if(linesPrinted!=0 && (linesPrinted%ROWS_IN_PAGE==0 ||
                               (linesPrinted%ROWS_IN_PAGE==ROWS_IN_PAGE-1 && strlen(curString)>80))) {
          printf("\nPress enter for the next page. 'q' to quit.");
          if(tolower(MON_get_line()[0])=='q') {
            printf("\n");
            return ret;
            }
          }
        printf("\n%s", curString);
        linesPrinted += ((strlen(curString)>80) ? 2 : 1);
        }
      }
    }
  printf("\n");
  return ret;
  }

/* This is just for backwards compatability, it prints all entries in the buffer */
/* by calling printPoLogFromOffset. */
int print_po_log(void)
{
  return printPoLogFromOffset(0);
  }

/* Prints the most recent 'count' messages in the buffer. */
int printLastMessages(int count)
{
  if (count>poLogBuff.count) count=poLogBuff.count;
  return printPoLogFromOffset(poLogBuff.count-count);
  }

/* Clears the contents of the buffer. */
void clear_po_log(void)
{
  /* Initialize the po log buffer. */
  poLogBuff.start = 0;
  poLogBuff.count = 0;
  }

/* Causes all logging to be redirected to the screen. */
void logs_to_screen(void)
{
  logDestination = toScreen;
  }

/* Causes all logging to go into the power optimizer log buffer. */
void logs_to_buffer(void)
{
  logDestination = toBuffer;
  }

#ifdef LOCAL_COMPILE
/* Causes all loggint to go into a file called 'dosc.log'. */
void logs_to_file(void)
{
  fclose(logFile);
  if(!(logFile = fopen("dosc.log", "wt")))
    printf("Could not open log file.\n");
  logDestination = toFile;
  }
#endif

/* Disables writes to the buffer from a specific application */
void blockPoApp(AppType app)
{
  blocked[app]=TRUE;
  }

/* Enables writes to the buffer from a specific applications */
void unBlockPoApp(AppType app)
{
  blocked[app]=FALSE;
  }

/* Disables writes to the buffer from all applications */
void blockAllPoApps(void)
{
  int i;
  for(i=0; i<DOSC_APP_TYPE_SIZE; i++)
    blocked[i] = TRUE;
  }

/* Enables writes to the buffer from all applications */
void unBlockAllPoApps(void)
{
  int i;
  for(i=0; i<DOSC_APP_TYPE_SIZE; i++)
    blocked[i] = FALSE;
  }

/* Saves a single copy of the current list of blocked apps */
void savePoBlockedApps(void)
{
  int i;
  for(i=0; i<DOSC_APP_TYPE_SIZE; i++)
    blockedBackup[i] = blocked[i];
  }

/* Restores a previously saved copy of the list of blocked apps */
void restorePoBlockedApps(void)
{
  int i;
  for(i=0; i<DOSC_APP_TYPE_SIZE; i++)
    blocked[i] = blockedBackup[i];
  }

/* Counts the number of apps currently blocked */
int countUnblockedApps(void)
{
  int i, ret;
  for(i=0, ret=0; i<DOSC_APP_TYPE_SIZE; i++)
    if(blocked[i] == FALSE) ret++;
  return ret;
  }

/* Used for a telnet-style connection to the program */
void printFromOffset_interface(void)
{
  printPoLogFromOffset(getInt("Skip how many", 0, 999, 0));
  }

void blockAnApp_interface(void)
{
  blockPoApp(getInt("Which app? [0=DOSC_LINK, 1=DOSC_NETWORK, 2=DOSC_TRANSPORT, 3=DOSC_NL_BUFF, 4=DOSC_TL_BUFF]", 0, 4, 0));
    }

void unBlockAnApp_interface(void)
{
  unBlockPoApp(getInt("Which app? [0=DOSC_LINK, 1=DOSC_NETWORK, 2=DOSC_TRANSPORT, 3=DOSC_NL_BUFF, 4=DOSC_TL_BUFF]", 0, 4, 0));
    }

void currentBufferSize_interface(void)
{
  printf("Current buffer has %i entries.\n", poLogBuff.count);
  }

/* Used for a telnet-style connection to the program */
void printLastMessages_interface(void)
{
  printLastMessages(getInt("Show how many", 0, 999, 0));
  }

/* this initializes the buffer & the blocked list */
void dosclogsi_entry (void)
{
#ifndef LOCAL_COMPILE
  static mon_cmd_rec mainList, mainEntry, print, pageOn, pageOff, clear, save, restore, blockAll, unBlockAll, printOffset, blockAnApp, unBlockAnApp, buffSize, printLast;
#endif

  /* Initialize the buffer internal pointers */
  clear_po_log();

  /* Start with page mode off */
  pageMode = DOSC_ON;

  /* Enable every application to write to the buffer */
  unBlockAllPoApps();

  /* By default, we only log to the po buffer. */
  logDestination = toBuffer;

#ifndef LOCAL_COMPILE
  /* Create all MCE monitor commands under "DoscLog" directory */
  MON_add_dir("DoscLog", &mainList);
/*   MON_add_sub_cmd("Main", main, &mainList, &mainEntry); */
  MON_add_sub_cmd("PrintLog", (void (*)(void))print_po_log, &mainList, &print);
  MON_add_sub_cmd("PagingOn", turnPoPagingOn, &mainList, &pageOn);
  MON_add_sub_cmd("PagingOff", turnPoPagingOff, &mainList, &pageOff);
  MON_add_sub_cmd("ClearLog", clear_po_log, &mainList, &clear);
  MON_add_sub_cmd("SaveApps", savePoBlockedApps, &mainList, &save);
  MON_add_sub_cmd("RestoreApps", restorePoBlockedApps, &mainList, &restore);
  MON_add_sub_cmd("BlockAll", blockAllPoApps, &mainList, &blockAll);
  MON_add_sub_cmd("UnBlockAll", unBlockAllPoApps, &mainList, &unBlockAll);
  MON_add_sub_cmd("PrintFromOffset", printFromOffset_interface, &mainList, &printOffset);
  MON_add_sub_cmd("BlockAnApp", blockAnApp_interface, &mainList, &blockAnApp);
  MON_add_sub_cmd("UnBlockAnApp", unBlockAnApp_interface, &mainList, &unBlockAnApp);
  MON_add_sub_cmd("CurrentLogSize", currentBufferSize_interface, &mainList, &buffSize);
  MON_add_sub_cmd("NewestMessages", printLastMessages_interface, &mainList, &printLast);
#endif
  }

/*************************************************************************
**  Function: getInt
**  Purpose: To retrieve an integer from the input buffer.
**  Parameters:
**    str - (char*) the prompt to display.
**    low,high - (int) the inclusive bounds of the allowable values.
**    Default - if no valid integer is input, then this default value is
**              returned.  This value is displayed in []'s in the prompt.
**  Notes:
**    If an out-of-bounds value is entered, a error message is displayed,
**    and another value must be entered.
**  Return value: (int) the entered value, or the Default.
*************************************************************************/
int getInt(char* str, int low, int high, int Default)
{
  int ret;
  char* line;

  do {
    printf("%s [%d]: ", str, Default);
    line = MON_get_line();
    if(sscanf(line, " %d", &ret)<=0) return Default;
    if(ret<low || ret>high) printf("The value must be in the range %d to %d\n", low, high);
    } while(ret<low || ret>high);
  return ret;
  }

--------------39487F263D904C57CA8F2F14
Content-Type: text/plain; charset=us-ascii;
 name="dosclogsi.aa02"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
 filename="dosclogsi.aa02"

INTERFACE DOSCLOGSI USES SIENCPUI, MONUI, SISWERGI;
$LI ENTRY dosclogsi_entry
/* EDITION AA02 (PEG00), UNXDEV PBEER.50 (99/07/21 21:59:00) -- OPEN */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#ifdef LOCAL_COMPILE
#define FALSE 0
#define TRUE 1
#endif

/* This is the number of characters which can be stored in each entry in messaging buffer */
#define PO_LINE_WIDTH 80

/* Each value in this enum represents an application that can post a message to
   the buffer.  To add a new application, add an element before DOSC_APP_TYPE_SIZE */
typedef enum {DOSC_LINK=0, DOSC_NETWORK, DOSC_TRANSPORT, DOSC_NL_BUFF, DOSC_TL_BUFF, DOSC_APP_TYPE_SIZE} AppType;

/* Scratch pad area. */
extern char potxt[PO_LINE_WIDTH*2+1];

/* Used to write a log entry. */
void writePoLog(AppType app, char *text);

/* Used to print the entire contents of the log buffer to screen. */
int print_po_log(void);

/* Used to reset(empty) the log buffer. */
void clear_po_log(void);

/* Returns the number of applications which are currently blocked */
int countUnblockedApps(void);

/* Prints the message buffer, skipping the first 'offset' messages */
int printPoLogFromOffset(int offset);

/* Blocks a specified application 'app' from posting messages */
void blockPoApp(AppType app);
/* Enables a specified application 'app' to post messages */
void unBlockPoApp(AppType app);
/* Enables all applications to post messages */
void unBlockAllPoApps(void);
/* Blocks all applications from posting messages */
void blockAllPoApps(void);

/* These 2 functions toggle paging mode.  If it is off when messages are displayed,
   all messages are printed without a break.  If it is on, messages are printed
   one page a time and wait for user input. */
void turnPoPagingOff(void);
void turnPoPagingOn(void);

/* saves a copy of the list of blocked applications.  This only saves a single
   copy, and if savePoBlockedApps is called twice before a restorePoBlockedApps
   is called, the first stored list is gone!  A stored list can be restored
   multiple times. */
void savePoBlockedApps(void);
void restorePoBlockedApps(void);

/* Causes all logging to be redirected to the screen/buffer/file. */
void logs_to_screen(void);
void logs_to_buffer(void);
#ifdef LOCAL_COMPILE
void logs_to_file(void);
#endif

void printFromOffset_interface(void);
void blockAnApp_interface(void);
void unBlockAnApp_interface(void);
void currentBufferSize_interface(void);
void printLastMessages_interface(void);


/* entry code */
void dosclogsi_entry(void);

int getInt(char* str, int low, int high, int Default);

#ifdef LOCAL_COMPILE
char* MON_get_line(void)
{
  static char line[100];
  int chr;
  if((chr=getc(stdin))!='\n') ungetc(chr, stdin);
  else return "";

  scanf(" %99[^\n]", line);
  if((chr=getc(stdin))!='\n') ungetc(chr, stdin);
  return line;
  }
#endif

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Content-Type: text/plain; charset=us-ascii;
 name="checksum.c"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline;
 filename="checksum.c"

#include <stdio.h>

typedef unsigned char byte;

byte AM[] = "223456789AZC";
byte SP[] = "abcdefghijkl";

byte checkSum(byte* AM, byte* SP)
{
  byte sum=0;
  int i;
  
  for(i=0; i<12; i++) {
    if(i!=10) sum+=AM[i];
    sum+=SP[i];
    }
  return sum;
  }


int main()
{
  AM[10]=checkSum(AM,SP);
  printf("AM=%s\n", AM);
  return 0;
  }


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