1 files changed, 52 insertions, 0 deletions
diff --git a/functions.c b/functions.c
new file mode 100644
index 0000000..73302b8
--- /dev/null
+++ b/functions.c
@@ -0,0 +1,52 @@
+#include "functions.h"
+
+// Print a debugging message, if debugging enabled
+int debugmode;
+void debug(char *string) {
+  if (debugmode) {
+    printf("DEBUG: %s\n", string);
+  }
+}
+
+// Get stdin line with buffer overrun protection
+int getstdin(char *prompt, char *buff, size_t sz) {
+  int ch, extra;
+
+  // Print optional prompt
+  if (prompt != NULL) {
+    printf ("%s", prompt);
+    fflush (stdout);
+  }
+
+  // Get the intput from stdin
+  if (fgets (buff, sz, stdin) == NULL) {
+    return NO_INPUT;
+  }
+
+  // If it was too long, there'll be no newline. In that case, we flush
+  // to end of line so that excess doesn't affect the next call.
+  if (buff[strlen(buff) - 1] != '\n') { // strlen of the actually entered line, not the original array size
+    extra = 0;
+    while (((ch = getchar()) != '\n') && (ch != EOF)) {
+      extra = 1;
+    }
+    return (extra == 1) ? TOO_LONG : OK;
+  }
+
+  // Otherwise remove newline and give string back to caller.
+  buff[strlen(buff) - 1] = '\0';
+  return OK;
+}
+
+// Append CR-LF to the end of a string (after cleaning up any existing trailing CR or LF)
+void appendcrlf(char *string) {
+  // Make sure it doesn't already end with CR or LF
+  while (string[strlen(string) - 1] == '\r' || string[strlen(string) - 1] == '\r') {
+    string[strlen(string) - 1] = '\0';
+  }
+
+  int startlen = strlen(string);
+  string[startlen] = '\r';
+  string[startlen + 1] = '\n';
+  string[startlen + 2] = '\0';
+}