From c3a5635b9f898fbc66195800fe9ddbef1ece2331 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Fri, 4 Nov 2016 11:53:56 +0000
Subject: [PATCH] generate all

---
 Makefile   |  3 +++
 generate   | 12 ------------
 generate.c | 37 +++++++++++++++++++++++++++++++++++++
 3 files changed, 40 insertions(+), 12 deletions(-)
 create mode 100644 Makefile
 delete mode 100755 generate
 create mode 100644 generate.c

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..f4499ca
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,3 @@
+CFLAGS=-Wall
+
+all: generate
diff --git a/generate b/generate
deleted file mode 100755
index 86c43ff..0000000
--- a/generate
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/usr/bin/perl -w
-use strict;
-
-foreach my $len (0..7) {
-    print STDERR "generate len $len\n";
-    foreach (my $val=0; ; $val++) {
-	my $s = sprintf "%0${len}d", $val;
-	last if length $s > $len;
-	$s =~ y/0-9/.+:~09mAZ-/;
-	print $s,"\n" or die $!;
-    }
-}
diff --git a/generate.c b/generate.c
new file mode 100644
index 0000000..f5b79f5
--- /dev/null
+++ b/generate.c
@@ -0,0 +1,37 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+
+static const char charset[]=
+  "01234567890"
+  "abcdefghijklmnopqrstuvwxyz"
+  "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
+  ".-+:~";
+
+#define ML 10
+
+static char sofar[ML+1];
+
+static void gen(char *inbuf, int len) {
+  if (!len) {
+    *inbuf = 0;
+    puts(sofar);
+    return;
+  }
+  const char *cp;
+  for (cp=charset; *cp; cp++) {
+    *inbuf = *cp;
+    gen(inbuf+1, len-1);
+  }
+}    
+
+int main(void) {
+  int len;
+
+  for (len=0; len<ML; len++) {
+    fprintf(stderr,"generating len=%d\n",len);
+    gen(sofar, len);
+  }
+  if (ferror(stdout) ||
+      fflush(stdout)) { perror("stdout"); abort(); }
+}
-- 
2.30.2