new toy: base32

Add new toy `base32`. Add tests for `base32`.

base32 is added by adapting the base64 encode/decode function to also do
base32 encoding/decoding. Then their respective main functions set up
the global parameter `n` to be the number of bits used in the encoding
(5 for base32 and 6 for base64) and `align` to align the result to a
certain length via padding. These are deliberately kept as parameters to
enable future expansion for other bases easily.

2 files changed, 13 insertions, 0 deletions

diff --git a/lib/lib.c b/lib/lib.c
index dfa4499f..1aa9b80d 100644
--- a/lib/lib.c
+++ b/lib/lib.c
@@ -870,6 +870,18 @@ void base64_init(char *p)
   *(p++) = '/';
 }
 
+// Init base32 table
+
+void base32_init(char *p)
+{
+  int i;
+
+  for (i = 'A'; i != '8'; i++) {
+    if (i == 'Z'+1) i = '2';
+    *(p++) = i;
+  }
+}
+
 int yesno(int def)
 {
   return fyesno(stdin, def);
diff --git a/lib/lib.h b/lib/lib.h
index 431ce5ad..1ba59ee3 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -255,6 +255,7 @@ void delete_tempfile(int fdin, int fdout, char **tempname);
 void replace_tempfile(int fdin, int fdout, char **tempname);
 void crc_init(unsigned int *crc_table, int little_endian);
 void base64_init(char *p);
+void base32_init(char *p);
 int yesno(int def);
 int fyesno(FILE *fp, int def);
 int qstrcmp(const void *a, const void *b);