cppfiles.c (read_and_prescan): Map backslash-newline to '\r' (which cannot otherwise appear in the processed...

1999-03-16 16:06 -0500  Zack Weinberg  <zack@rabi.columbia.edu>
	* cppfiles.c (read_and_prescan): Map backslash-newline to '\r'
	(which cannot otherwise appear in the processed buffer) and
	move it out of tokens that it appears in the middle of.
	Improve performance.
	(find_position): New function.
	* cpplib.c: \r (one character) indicates backslash
	newline, not \\\n (two characters).  It cannot appear in the
	middle of a token.  Call CPP_BUMP_LINE (pfile) whenever
	parsing moves past \n or \r.  Increment pfile->lineno whenever
	a \n is placed into token_buffer.  Only one mark can exist at
	a time, and CPP_BUMP_LINE must not be used while it is
	active.  It is automatically cleared by cpp_pop_buffer and
	parse_goto_mark.  \r is not in is_hor_space or is_space.
	(NEWLINE_FIX, NEWLINE_FIX1, adjust_position,
	update_position, count_newlines, parse_move_mark): Removed.
	(parse_string, copy_comment): New functions.
	(parse_name): Returns void.
	(parse_set_mark, parse_clear_mark, parse_goto_mark): Take only
	one argument, a cpp_reader *.  Change for new marking scheme.
	(skip_comment): Handle CHILL line comments too.  Second
	argument is now first character of comment marker; all callers
	changed.  Issue error for unterminated block comment here.
	(cpp_skip_hspace): Recognize CHILL comments.
	(copy_rest_of_line): Likewise.  Call skip_comment and
	parse_string directly, don't go through cpp_get_token.  Emit
	"/**/" for block comments if -traditional (create_definition
	needs this).
	(do_define): Don't play with put_out_comments.
	(cpp_push_buffer): Initialize ->mark to -1.
	(cpp_buf_line_and_col): Just read out the values in the buffer
	structure.
	(output_line_command): Use cpp_buf_line_and_col.  Fix
	formatting.  Remove stale code.
	(cpp_get_token): Break out string parsing code to
	parse_string.  Use skip_comment for CHILL comments too.  Use
	copy_comment for put_out_comments instead of dinking with
	marks.  Remove stale code.  Don't call output_line_command
	unless it's necessary.
	* cpplib.h (parse_marker): Removed.
	(struct cpp_buffer): line_base is now a unsigned char *; add
	`mark' [long], remove `marks' [struct parse_marker *].
	(parse_set_mark, parse_clear_mark, parse_goto_mark): Update
	prototypes.
	(CPP_BUMP_LINE, CPP_BUMP_BUFFER_LINE): New macros.
	* cppinit.c (is_hor_space, is_space): '\r' is not considered
	whitespace.
	* cppexp.c (cpp_parse_expression): Use cpp_skip_hspace, not
	SKIP_WHITE_SPACE.
	* cpphash.c (macarg): Disable line commands while expanding.

From-SVN: r25802

1 files changed, 4 insertions, 5 deletions

diff --git a/gcc/cppinit.c b/gcc/cppinit.c
index c393308..08bbff4 100644
--- a/gcc/cppinit.c
+++ b/gcc/cppinit.c
@@ -255,15 +255,16 @@ U_CHAR is_idstart[256] =
   ['_']  = 1,
 };
 
-/* Table to tell if a character is horizontal space. */
+/* Table to tell if a character is horizontal space.
+   \r is magical, so it is not in here.  */
 U_CHAR is_hor_space[256] =
 {
-  [' '] = 1, ['\t'] = 1, ['\v'] = 1, ['\f'] = 1, ['\r'] = 1
+  [' '] = 1, ['\t'] = 1, ['\v'] = 1, ['\f'] = 1,
 };
 /* table to tell if a character is horizontal or vertical space.  */
 U_CHAR is_space[256] =
 {
-  [' '] = 1, ['\t'] = 1, ['\v'] = 1, ['\f'] = 1, ['\r'] = 1, ['\n'] = 1,
+  [' '] = 1, ['\t'] = 1, ['\v'] = 1, ['\f'] = 1, ['\n'] = 1,
 };
 /* Table to handle trigraph conversion, which occurs before all other
    processing, everywhere in the file.  (This is necessary since one
@@ -362,14 +363,12 @@ initialize_char_syntax (dollar_in_ident)
   is_hor_space['\t'] = 1;
   is_hor_space['\v'] = 1;
   is_hor_space['\f'] = 1;
-  is_hor_space['\r'] = 1;
 
   is_space[' '] = 1;
   is_space['\t'] = 1;
   is_space['\v'] = 1;
   is_space['\f'] = 1;
   is_space['\n'] = 1;
-  is_space['\r'] = 1;
 
   /* trigraph conversion */
   trigraph_table['='] = '#';  trigraph_table[')'] = ']';