cppfiles.c (stack_include_file): Don't optimize zero-length files.

	* cppfiles.c (stack_include_file): Don't optimize zero-length
	files.
	(read_include_file): NUL-terminate read files.
	* cpplex.c (handle_newline, skip_escaped_newlines,
	get_effective_char, skip_whitespace, parse_identifier,
	parse_identifier_slow, parse_number, parse_string,
	_cpp_lex_direct): Optimize for the fact that buffers are guaranteed
	NUL-terminated.
	* cpplib.c (destringize_and_run, cpp_define, handle_assertion):
	Be sure buffers are NUL terminated.
	* cppmacro.c (warn_of_redefinition): Kill compile warning.

	* c-common.c: Include tree-inline.h.
	(c_language): Move separate definitions here.
	(c_common_init_options, c_common_post_options): New.
	(c_common_lang_init): Rename c_common_init.
	* c-common.h (c_common_lang_init): Similarly.
	(c_common_init_options, c_common_post_options): New.
	* c-lang.c (c_post_options): Move body to c_common_post_options.
	(c_init_options): Use c_common_init_options.
	(c_init): Update.
	* langhooks.def: Rearrange.
	* langhooks.h: Rearrange, and improve comments.
	* toplev.c (do_compile): New function.
	(toplev_main): Use it.
	(lang_independent_f_options, parse_options_and_default_flags,
	process_options): Remove trailing periods.
	* Makefile.in: Update.
cp:	* decl2.c (c_language): Move to c-common.c.
	* lex.c (cxx_post_options, cxx_init_options): Use c-common.c
	functions.
	(cxx_init): Update.
objc:	* objc-act.c (objc_post_options, objc_init_options): Use c-common.c
	functions.
	(ojbc_init): Update.

From-SVN: r47362

1 files changed, 6 insertions, 4 deletions

diff --git a/gcc/cpplib.c b/gcc/cpplib.c
index 324c7b2..ea1d9f8 100644
--- a/gcc/cpplib.c
+++ b/gcc/cpplib.c
@@ -1158,7 +1158,7 @@ destringize_and_run (pfile, in)
   const unsigned char *src, *limit;
   char *dest, *result;
 
-  dest = result = alloca (in->len);
+  dest = result = alloca (in->len + 1);
   for (src = in->text, limit = src + in->len; src < limit;)
     {
       /* We know there is a character following the backslash.  */
@@ -1166,6 +1166,7 @@ destringize_and_run (pfile, in)
 	src++;
       *dest++ = *src++;
     }
+  *dest = '\0';
 
   run_directive (pfile, T_PRAGMA, result, dest - result);
 }
@@ -1647,9 +1648,8 @@ cpp_define (pfile, str)
      Change the first "=" in the string to a space.  If there is none,
      tack " 1" on the end.  */
 
-  /* Length including the null.  */  
   count = strlen (str);
-  buf = (char *) alloca (count + 2);
+  buf = (char *) alloca (count + 3);
   memcpy (buf, str, count);
 
   p = strchr (str, '=');
@@ -1660,6 +1660,7 @@ cpp_define (pfile, str)
       buf[count++] = ' ';
       buf[count++] = '1';
     }
+  buf[count] = '\0';
 
   run_directive (pfile, T_DEFINE, buf, count);
 }
@@ -1714,11 +1715,12 @@ handle_assertion (pfile, str, type)
     {
       /* Copy the entire option so we can modify it.  Change the first
 	 "=" in the string to a '(', and tack a ')' on the end.  */
-      char *buf = (char *) alloca (count + 1);
+      char *buf = (char *) alloca (count + 2);
 
       memcpy (buf, str, count);
       buf[p - str] = '(';
       buf[count++] = ')';
+      buf[count] = '\0';
       str = buf;
     }