The Client

/* 	Mike Cook
	6/26/98
	REU 1998
	RPC Client/Server Program -- Client side
*/

#include "header.h"

struct varintarr 	input_structure;
struct varchararr	text_input_structure, text_result_structure; 

int intsRead[MAXSIZE], size;
char command;

void get_nums(register FILE *fp);
void get_nums_as_text(register FILE *fp);

void main(int argc, char **argv)
{
	int ret_value, result = 0, flag = 1;
	static char choice[3];

	command = 'c';

	printf("\n");
	while (flag == 1)
	{
		printf("To add integers in text format, enter \'t\'.");
		printf("\nTo add integers in binary format, enter \'b\'.\n");
		fgets(choice, 3, stdin);


		if (choice[0] != 't' && choice[0] != 'T' && choice[0] != 'b' &&
			choice[0] != 'B')
		{
			printf("\nPlease enter a valid character.\n");
			flag = 1;
		}
		else
			flag = 0;
	}
	
	if (choice[0] == 't' || choice[0] == 'T')
		printf("\nYou have selected to enter integers as text.\n");
	else
		printf("\nYou have selected to enter integers as binary.\n");

	if ( (ret_value = callrpc(argv[1], PROGRAM, VERSION, ROUTINE_1,
		  xdr_char, &choice[0], xdr_void, 0)) != 0)
	{
			printf("callrpc error: ret_value = %d\n", ret_value);
			exit(1);
	}
			
	printf("Enter some integers to add (\'q\' to quit): \n\n");
	while (command != 'q')
	{
		if (choice[0] == 'b' || choice[0] == 'B')
		{
			get_nums(stdin);
	
			if( (ret_value = callrpc(argv[1], PROGRAM, VERSION, ROUTINE_2,
				 xdr_varintarr, &input_structure, xdr_int, &result)) != 0)
			{
				printf("callrpc error: ret_value = %d\n", ret_value);
				exit(1);
			}

			printf("\nThe sum of the integers entered is: %d\n", result);
			printf("\n");
			result = 0;
		}
		else
		{
			get_nums_as_text(stdin);
	
			if( (ret_value = callrpc(argv[1], PROGRAM, VERSION, ROUTINE_3,
				 xdr_varchararr, &text_input_structure, xdr_varchararr,
				 &text_result_structure)) != 0)
			{
				printf("callrpc error: ret_value = %d\n", ret_value);
				exit(1);
			}

			printf("\nThe sum of the integers entered is: %s\n", 
					text_result_structure.data);
			printf("\n");
			free(text_result_structure.data);
		}			

		printf("Enter some more integers to add (\'q\' to quit): \n\n");
	}
}

void get_nums(register FILE *fp)
{
	int 	n, i, spaces;
	char 	inputline[MAXLINE];
	char	*ptr;

	fgets(inputline, MAXLINE, fp);

	spaces = 0;
	size = 0;
	ptr = inputline;

	n = strlen(inputline);
	while (n < 2)
	{
		printf("Don\'t just hit return.  Enter some integers!\n");
		n = strlen(fgets(inputline, MAXLINE, fp));
	}

	if (inputline[0] == 'q' || inputline[0] == 'Q')
	{
		printf("\nYou have quit the program.  Goodbye!!!!!!!!!!!\n\n");
		command = 'q';
		exit(0);
	}
		
	for (i = 0; i < n; i++)
	{
		if (inputline[i] == ' ')		
			spaces++;
	}
	spaces++;	/* The number of integers on the line read */
	size = (spaces + 1);
	intsRead[0] = spaces;
		
	for (i = 1; i <= spaces; i++)
	{
		if (i == spaces)
		{
			sscanf(ptr, "%d", &intsRead[i]);
		}
		else
		{
			sscanf(ptr, "%d ", &intsRead[i]);
			while (*ptr != ' ')
			{
				ptr++;
			}
			ptr++;
		}
	}

 	if (ferror(fp))
	    perror("str_cli: error reading file");

	input_structure.data = intsRead;
	input_structure.arrlnth = size;
}

void get_nums_as_text(register FILE *fp)
{
	int 			n, i, spaces;
	static char 	inputline[MAXLINE];
	char			*ptr;

	fgets(inputline, MAXLINE, fp);

	spaces = 0;
	size = 0;
	ptr = inputline;

	n = strlen(inputline);
	while (n < 2)
	{
		printf("Don\'t just hit return.  Enter some integers!\n");
		n = strlen(fgets(inputline, MAXLINE, fp));
	}

	if (inputline[0] == 'q' || inputline[0] == 'Q')
	{
		printf("\nYou have quit the program.  Goodbye!!!!!!!!!!!\n\n");
		command = 'q';
		exit(0);
	}
		
 	if (ferror(fp))
	    perror("str_cli: error reading file");

	text_input_structure.data = inputline;
	text_input_structure.arrlnth = n;
}