/*--------------------------------------------------------------------------------------------------------------
* FUNCTION: MainTerminate
* DESCR: Terminates the program. If pTermCode is 0, then the program terminated normally without error. If
* pTermCode is nonzero, then the program terminated abnormally because of some sort of error. In the
* latter case, a formatted error message should be displayed.
* RETURNS: Nothing
* NOTE: This is a variadic function because the ... following the required pFmt parameter states that
* there may be 0, 1, 2, ... optional parameters. Variadic arguments are handled by preprocessor
* macros defined in stdarg.h, in particular: va_list, va_start, va_arg, and va_end.
* NOTE: This function works similarly to printf(). A typical call would be something like,
*
* MainTerminate(-1, "An error code %d occurred in %s", err_code, some_string_var);
*
* pTermCode would be initialized to -1 when the function is called. pFmt would be initialized to
* "An error code %d occurred in %s", and there would be two variadic arguments: err_code which
* had better be an int variable, and some_string_var which had better be of the data type char *.
* If you located the source code for the printf() function in the C Standard Library, you will see
* that it looks very similar to this, only without the pTermCode parameters, and it will handle
* more format specifiers than just %c, %d, and %s.
*------------------------------------------------------------------------------------------------------------*/
void MainTerminate
(
int pTermCode,
char *pFmt,
...
)
{
if (pTermCode != 0) {
char *fp, msg[4096];
sprintf(msg, "%s: ", BINARY);
va_list argp; va_start(argp, pFmt);
for (fp = pFmt; fp && *fp; fp++) {
if (*fp != '%') {
StrCatChar(msg, *fp);
} else {
switch (*++fp) {
case 'c': StrCatChar(msg, (char)va_arg(argp, int)); break;
case 'd': StrCatInt(msg, va_arg(argp, int)); break;
case 's': strcat(msg, va_arg(argp, char *)); break;
}
}
}
va_end(argp);
ViewPrintStr(msg);
}
/*--------------------------------------------------------------------------------------------------------------
* FUNCTION: ControllerRun
* DESCR: Called after the Controller is initialized in ControllerBegin and after the command line has been
* parsed. Reads the key from the specified key file name. Calls ControllerEncryptDecrypt to encrypt
* or decrypt a message. Finally calls ViewPrintStr to print the encrypted or decrypted message.
* RETURNS: Nothing.
* PSEUDOCODE:
* Define a char array named key which is of length MAX_MSG_LEN+1.
* Define a char array named msgOut which is of length MAX_MSG_LEN+1.
* Call ModelGetKeyFilename() to get the key file name that was parsed from the command line.
* Call FileReadStr() and pass the key file name and the key array as parameters. This will read the key
* from the file.
* Call ModelSetKey() to store the key that was read from the file.
* Call ModelGetMode() to get the mode from the Model (the mode was parsed from the command line).
* Call ControllerEncryptDecrypt() and pass the mode and msgOut as parameters.
* Call ViewPrintStr() and pass msgOut as the parameter.
*------------------------------------------------------------------------------------------------------------*/
void ControllerRun()
{
char *key[MAX_MSG_LEN+1];
char *msgOut[MAX_MSG_LEN+1];
*key=ModelGetKeyFilename();
FileReadStr(*key,*msgOut);
ModelSetKey(*msgOut);
ControllerEncryptDecrypt(ModelGetMode(),*msgOut);
ViewPrintStr(*msgOut);
}
/*--------------------------------------------------------------------------------------------------------------
* FUNCTION: ControllerRun
* DESCR: Called after the Controller is initialized in ControllerBegin and after the command line has been
* parsed. Reads the key from the specified key file name. Calls ControllerEncryptDecrypt to encrypt
* or decrypt a message. Finally calls ViewPrintStr to print the encrypted or decrypted message.
* RETURNS: Nothing.
* PSEUDOCODE:
* Define a char array named key which is of length MAX_MSG_LEN+1.
* Define a char array named msgOut which is of length MAX_MSG_LEN+1.
* Call ModelGetKeyFilename() to get the key file name that was parsed from the command line.
* Call FileReadStr() and pass the key file name and the key array as parameters. This will read the key
* from the file.
* Call ModelSetKey() to store the key that was read from the file.
* Call ModelGetMode() to get the mode from the Model (the mode was parsed from the command line).
* Call ControllerEncryptDecrypt() and pass the mode and msgOut as parameters.
* Call ViewPrintStr() and pass msgOut as the parameter.
*------------------------------------------------------------------------------------------------------------*/
void ControllerRun
(
)
{
char key[MAX_MSG_LEN+1];
char msgOut[MAX_MSG_LEN+1];
strcpy(key,ModelGetKeyFilename());
FileReadStr(key,key);
ModelSetKey(key);
ControllerEncryptDecrypt(ModelGetMode(), msgOut);
ViewPrintStr(msgOut);
}
