experimental support for base64 encoded binary data

bstr_diff.c

@@ -0,0 +1,25 @@
+#include "str.h"
+#include "uint32.h"
+
+int bstr_diff(const char* a,const char* b) {
+  const char* A,* B;
+  int j;
+  /* like str_diff, just for bstrs */
+  if (*a && *b)
+    return str_diff(a,b);
+  if (*a) A=a+strlen(a); else { A=a+5+uint32_read(a+1); a+=5; }
+  if (*b) B=b+strlen(b); else { B=b+5+uint32_read(b+1); b+=5; }
+  for (;;) {
+    if (a==A) {
+      if (b==B)
+	return 0;
+      else
+	return -1;
+    } else
+      if (b==B)
+	return 1;
+    if ((j=(*a-*b))) break;
+    ++a; ++b;
+  }
+  return j;
+}