1 files changed, 44 insertions, 10 deletions

diff --git a/gl/base64.h b/gl/base64.h
index 99137652..7691f6c4 100644
--- a/gl/base64.h
+++ b/gl/base64.h
@@ -1,5 +1,5 @@
 /* base64.h -- Encode binary data using printable characters.
-   Copyright (C) 2004-2006, 2009-2023 Free Software Foundation, Inc.
+   Copyright (C) 2004-2006, 2009-2024 Free Software Foundation, Inc.
    Written by Simon Josefsson.
 
    This file is free software: you can redistribute it and/or modify
@@ -16,18 +16,33 @@
    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
 
 #ifndef BASE64_H
-# define BASE64_H
+#define BASE64_H
+
+/* This file uses _GL_INLINE_HEADER_BEGIN.  */
+#if !_GL_CONFIG_H_INCLUDED
+ #error "Please include config.h first."
+#endif
 
 /* Get idx_t.  */
-# include <idx.h>
+#include <idx.h>
+
+/* Pacify GCC in isubase64.  */
+#if defined __GNUC__ && 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
+# pragma GCC diagnostic ignored "-Wtype-limits"
+#endif
+
+_GL_INLINE_HEADER_BEGIN
+#ifndef BASE64_INLINE
+# define BASE64_INLINE _GL_INLINE
+#endif
 
-# ifdef __cplusplus
+#ifdef __cplusplus
 extern "C" {
-# endif
+#endif
 
 /* This uses that the expression (n+(k-1))/k means the smallest
    integer >= n/k, i.e., the ceiling of n/k.  */
-# define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4)
+#define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4)
 
 struct base64_decode_context
 {
@@ -35,14 +50,31 @@ struct base64_decode_context
   char buf[4];
 };
 
-extern bool isbase64 (char ch) _GL_ATTRIBUTE_CONST;
+extern signed char const base64_to_int[256];
+
+BASE64_INLINE bool
+isubase64 (unsigned char ch)
+{
+  return ch < sizeof base64_to_int && 0 <= base64_to_int[ch];
+}
+
+BASE64_INLINE bool
+isbase64 (char ch)
+{
+  return isubase64 (ch);
+}
 
 extern void base64_encode (const char *restrict in, idx_t inlen,
                            char *restrict out, idx_t outlen);
 
 extern idx_t base64_encode_alloc (const char *in, idx_t inlen, char **out);
 
-extern void base64_decode_ctx_init (struct base64_decode_context *ctx);
+/* Initialize decode-context buffer, CTX.  */
+BASE64_INLINE void
+base64_decode_ctx_init (struct base64_decode_context *ctx)
+{
+  ctx->i = 0;
+}
 
 extern bool base64_decode_ctx (struct base64_decode_context *ctx,
                                const char *restrict in, idx_t inlen,
@@ -58,8 +90,10 @@ extern bool base64_decode_alloc_ctx (struct base64_decode_context *ctx,
 #define base64_decode_alloc(in, inlen, out, outlen) \
         base64_decode_alloc_ctx (NULL, in, inlen, out, outlen)
 
-# ifdef __cplusplus
+#ifdef __cplusplus
 }
-# endif
+#endif
+
+_GL_INLINE_HEADER_END
 
 #endif /* BASE64_H */