From 7c81a49d762e67b21c99a95b86d1e7886d91de02 Mon Sep 17 00:00:00 2001
From: Vivien Kraus <vivien@planete-kraus.eu>
Date: Fri, 27 Nov 2020 19:28:50 +0100
Subject: Add a base64 encoder and decoder

---
 src/base64/Makefile.am           | 11 +++++++++++
 src/base64/libwebidoidc-base64.c | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+)
 create mode 100644 src/base64/Makefile.am
 create mode 100644 src/base64/libwebidoidc-base64.c

(limited to 'src/base64')

diff --git a/src/base64/Makefile.am b/src/base64/Makefile.am
new file mode 100644
index 0000000..11fdc5a
--- /dev/null
+++ b/src/base64/Makefile.am
@@ -0,0 +1,11 @@
+noinst_LTLIBRARIES += %reldir%/libwebidoidc-base64.la
+EXTRA_DIST += %reldir%/libwebidoidc-base64.x
+BUILT_SOURCES += %reldir%/libwebidoidc-base64.x
+
+%canon_reldir%_libwebidoidc_base64_la_LIBADD = $(GUILE_LIBS) $(NETTLE_LIBS)
+
+AM_CFLAGS += -I %reldir% -I $(srcdir)/%reldir%
+
+INDENTED += %reldir%/libwebidoidc-base64.c
+
+%reldir%/libwebidoidc-base64.o: %reldir%/libwebidoidc-base64.x
diff --git a/src/base64/libwebidoidc-base64.c b/src/base64/libwebidoidc-base64.c
new file mode 100644
index 0000000..8eb29b8
--- /dev/null
+++ b/src/base64/libwebidoidc-base64.c
@@ -0,0 +1,38 @@
+#include <utilities.h>
+
+#define _(s) dgettext (PACKAGE, s)
+
+void init_webidoidc_base64 (void);
+
+SCM_DEFINE (webidoidc_base64_encode_g, "base64-encode", 1, 0, 0, (SCM data),
+	    "Encode @var{data} as base64. If @var{data} is a string, first encode it to UTF-8.")
+{
+  size_t c_size;
+  uint8_t *c_data;
+  if (scm_is_string (data))
+    {
+      return webidoidc_base64_encode_g (scm_string_to_utf8 (data));
+    }
+  c_size = scm_c_bytevector_length (data);
+  c_data = scm_gc_malloc_pointerless (c_size, "data");
+  memcpy (c_data, SCM_BYTEVECTOR_CONTENTS (data), c_size);
+  return wrap_bytevector (c_size, c_data);
+}
+
+SCM_DEFINE (webidoidc_base64_decode_g, "base64-decode", 1, 0, 0, (SCM data),
+	    "Decode @var{data} from base64.")
+{
+  size_t c_size;
+  uint8_t *c_data = get_as_bytevector (data, &c_size, 1);
+  SCM ret = scm_c_make_bytevector (c_size);
+  memcpy (SCM_BYTEVECTOR_CONTENTS (ret), c_data, c_size);
+  return ret;
+}
+
+void
+init_webidoidc_base64 (void)
+{
+#ifndef SCM_MAGIC_SNARFER
+#include "libwebidoidc-base64.x"
+#endif /* not SCM_MAGIC_SNARFER */
+}
-- 
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