You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
135 lines
2.6 KiB
135 lines
2.6 KiB
/** WARNING: This code is fresh and potentially isn't correct yet. */
|
|
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <stdarg.h>
|
|
#include "dbg.h"
|
|
|
|
#define MAX_DATA 100
|
|
|
|
int read_string(char **out_string, int max_buffer)
|
|
{
|
|
*out_string = calloc(1, max_buffer + 1);
|
|
check_mem(*out_string);
|
|
|
|
char *result = fgets(*out_string, max_buffer, stdin);
|
|
check(result != NULL, "Input error.");
|
|
|
|
return 0;
|
|
|
|
error:
|
|
if(*out_string) free(*out_string);
|
|
*out_string = NULL;
|
|
return -1;
|
|
}
|
|
|
|
int read_int(int *out_int)
|
|
{
|
|
char *input = NULL;
|
|
int rc = read_string(&input, MAX_DATA);
|
|
check(rc == 0, "Failed to read number.");
|
|
|
|
*out_int = atoi(input);
|
|
|
|
free(input);
|
|
return 0;
|
|
|
|
error:
|
|
if(input) free(input);
|
|
return -1;
|
|
}
|
|
|
|
int read_scan(const char *fmt, ...)
|
|
{
|
|
int i = 0;
|
|
int rc = 0;
|
|
int *out_int = NULL;
|
|
char *out_char = NULL;
|
|
char **out_string = NULL;
|
|
int max_buffer = 0;
|
|
|
|
va_list argp;
|
|
va_start(argp, fmt);
|
|
|
|
for(i = 0; fmt[i] != '\0'; i++) {
|
|
if(fmt[i] == '%') {
|
|
i++;
|
|
switch(fmt[i]) {
|
|
case '\0':
|
|
sentinel("Invalid format, you ended with %%.");
|
|
break;
|
|
|
|
case 'd':
|
|
out_int = va_arg(argp, int *);
|
|
rc = read_int(out_int);
|
|
check(rc == 0, "Failed to read int.");
|
|
break;
|
|
|
|
case 'c':
|
|
out_char = va_arg(argp, char *);
|
|
*out_char = fgetc(stdin);
|
|
break;
|
|
|
|
case 's':
|
|
max_buffer = va_arg(argp, int);
|
|
out_string = va_arg(argp, char **);
|
|
rc = read_string(out_string, max_buffer);
|
|
check(rc == 0, "Failed to read string.");
|
|
break;
|
|
|
|
default:
|
|
sentinel("Invalid format.");
|
|
|
|
}
|
|
} else {
|
|
fgetc(stdin);
|
|
}
|
|
|
|
check(!feof(stdin) && !ferror(stdin), "Input error.");
|
|
}
|
|
|
|
va_end(argp);
|
|
return 0;
|
|
|
|
error:
|
|
va_end(argp);
|
|
return -1;
|
|
}
|
|
|
|
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
char *first_name = NULL;
|
|
char initial = ' ';
|
|
char *last_name = NULL;
|
|
int age = 0;
|
|
|
|
printf("What's your first name? ");
|
|
int rc = read_scan("%s", MAX_DATA, &first_name);
|
|
check(rc == 0, "Failed first name.");
|
|
|
|
printf("What's your initial? ");
|
|
rc = read_scan("%c\n", &initial);
|
|
check(rc == 0, "Failed initial.");
|
|
|
|
printf("What's your last name? ");
|
|
rc = read_scan("%s", MAX_DATA, &last_name);
|
|
check(rc == 0, "Failed last name.");
|
|
|
|
printf("How old are you? ");
|
|
rc = read_scan("%d", &age);
|
|
|
|
printf("---- RESULTS ----\n");
|
|
printf("First Name: %s", first_name);
|
|
printf("Initial: '%c'\n", initial);
|
|
printf("Last Name: %s", last_name);
|
|
printf("Age: %d\n", age);
|
|
|
|
free(first_name);
|
|
free(last_name);
|
|
return 0;
|
|
error:
|
|
return -1;
|
|
}
|