Fix misuses of NULL when talking about the NUL character

* lisp/subr.el (inhibit-null-byte-detection): Make it an obsolete alias.

* src/coding.c (setup_coding_system): Use new name.
(detect_coding): Rename null_byte_found => nul_byte_found.
(detect_coding_system): Use new name.
Rename null_byte_found => nul_byte_found.
(Fdefine_coding_system_internal): Use new name.
(syms_of_coding): Rename inhibit-null-byte-detection to
inhibit-nul-byte-detection.
* src/w16select.c (get_clipboard_data): null_char => nul_char.
* src/json.c (check_string_without_embedded_nuls): Rename from
check_string_without_embedded_nulls.
(Fjson_parse_string): Adjust accordingly.
* src/coding.h (enum define_coding_undecided_arg_index)
(enum coding_attr_index): ...null_byte... => ...nul_byte....
* lisp/info.el (info-insert-file-contents, Info-insert-dir):
* lisp/international/mule.el (define-coding-system):
* lisp/vc/vc-git.el (vc-git--call):
* doc/lispref/nonascii.texi (Lisp and Coding Systems): Use the new name.

1 files changed, 6 insertions, 6 deletions

diff --git a/src/w32.c b/src/w32.c
index f3e88afd5bf..082a66b7384 100644
--- a/src/w32.c
+++ b/src/w32.c
@@ -5941,7 +5941,7 @@ is_symlink (const char *filename)
 
 /* If NAME identifies a symbolic link, copy into BUF the file name of
    the symlink's target.  Copy at most BUF_SIZE bytes, and do NOT
-   null-terminate the target name, even if it fits.  Return the number
+   NUL-terminate the target name, even if it fits.  Return the number
    of bytes copied, or -1 if NAME is not a symlink or any error was
    encountered while resolving it.  The file name copied into BUF is
    encoded in the current ANSI codepage.  */
@@ -6045,10 +6045,10 @@ readlink (const char *name, char *buf, size_t buf_size)
 	  size_t size_to_copy = buf_size;
 
 	  /* According to MSDN, PrintNameLength does not include the
-	     terminating null character.  */
+	     terminating NUL character.  */
 	  lwname = alloca ((lwname_len + 1) * sizeof(WCHAR));
 	  memcpy (lwname, lwname_src, lwname_len);
-	  lwname[lwname_len/sizeof(WCHAR)] = 0; /* null-terminate */
+	  lwname[lwname_len/sizeof(WCHAR)] = 0; /* NUL-terminate */
 	  filename_from_utf16 (lwname, resolved);
 	  dostounix_filename (resolved);
 	  lname_size = strlen (resolved) + 1;
@@ -9384,7 +9384,7 @@ w32_read_registry (HKEY rootkey, Lisp_Object lkey, Lisp_Object lname)
       /* Convert input strings to UTF-16.  */
       encoded_key = code_convert_string_norecord (lkey, Qutf_16le, 1);
       memcpy (key_w, SSDATA (encoded_key), SBYTES (encoded_key));
-      /* wchar_t strings need to be terminated by 2 null bytes.  */
+      /* wchar_t strings need to be terminated by 2 NUL bytes.  */
       key_w [SBYTES (encoded_key)/2] = L'\0';
       encoded_vname = code_convert_string_norecord (lname, Qutf_16le, 1);
       memcpy (value_w, SSDATA (encoded_vname), SBYTES (encoded_vname));
@@ -9476,7 +9476,7 @@ w32_read_registry (HKEY rootkey, Lisp_Object lkey, Lisp_Object lname)
       case REG_SZ:
 	if (use_unicode)
 	  {
-	    /* pvalue ends with 2 null bytes, but we need only one,
+	    /* pvalue ends with 2 NUL bytes, but we need only one,
 	       and AUTO_STRING_WITH_LEN will add it.  */
 	    if (pvalue[vsize - 1] == '\0')
 	      vsize -= 2;
@@ -9485,7 +9485,7 @@ w32_read_registry (HKEY rootkey, Lisp_Object lkey, Lisp_Object lname)
 	  }
 	else
 	  {
-	    /* Don't waste a byte on the terminating null character,
+	    /* Don't waste a byte on the terminating NUL character,
 	       since make_unibyte_string will add one anyway.  */
 	    if (pvalue[vsize - 1] == '\0')
 	      vsize--;