first commit

input.c

@@ -0,0 +1,37 @@
+#include "input.h"
+
+#define OBUFSIZE  4
+#define SBUFSIZE  5
+
+#define PADDING '='
+
+unsigned char o[OBUFSIZE];
+unsigned char s[SBUFSIZE];
+
+unsigned char *
+getocts(FILE *fp, int *np)
+{
+    int n, c;
+
+    n = 0;
+    while (n < OBUFSIZE-1 && (c = fgetc(fp)) != EOF)
+        o[n++] = c;
+    *np = n;
+
+    return (*np) ? o : NULL;
+}
+
+unsigned char *
+getsxts(FILE *fp, int *np)
+{
+    int n, p, c;
+
+    n = p = 0;
+    while (n < SBUFSIZE-1 && (c = fgetc(fp)) != EOF && c != PADDING)
+        s[n++] = c;
+    while (n+p < SBUFSIZE-1)
+        s[n+p++] = PADDING;
+    *np = n;
+
+    return (n) ? s : NULL;
+}