Move getLine to mics.c.

1 files changed, 31 insertions, 0 deletions

diff --git a/misc.c b/misc.c
new file mode 100644
index 0000000..9de0044
--- /dev/null
+++ b/misc.c
@@ -0,0 +1,31 @@
+//for reading from stdin
+#include <string.h>
+
+#define OK       0
+#define NO_INPUT 1
+#define TOO_LONG 2
+
+static int getLine (char *prmpt, char *buff, size_t sz) {
+    int ch, extra;
+
+    // Get line with buffer overrun protection.
+    if (prmpt != NULL) {
+        printf ("%s", prmpt);
+        fflush (stdout);
+    }
+    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') {
+        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;
+}