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cpplib.c (read_line_number): New fn, split out of...

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* cpplib.c (read_line_number): New fn, split out of...
	(do_line): Here.

From-SVN: r28707
This commit is contained in:
Jason Merrill 1999-08-14 00:42:07 +00:00 committed by Jason Merrill
parent 8dd3f57a9e
commit d3a34a0a7e
2 changed files with 49 additions and 25 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
Fri Aug 13 17:41:55 1999 Jason Merrill <jason@yorick.cygnus.com>
* cpplib.c (read_line_number): New fn, split out of...
(do_line): Here.
Fri Aug 13 14:18:27 1999 Gavin Romig-Koch <gavin@cygnus.com>
tree.c (lang_unsave_expr_now) : New.

71
gcc/cpplib.c
View File

@ -1208,6 +1208,34 @@ do_include (pfile, keyword)
return 0;
}
/* Subroutine of do_line. Read next token from PFILE without adding it to
the output buffer. If it is a number between 1 and 4, store it in *NUM
and return 1; otherwise, return 0 and complain if we aren't at the end
of the directive. */
static int
read_line_number (pfile, num)
cpp_reader *pfile;
int *num;
{
long save_written = CPP_WRITTEN (pfile);
U_CHAR *p = pfile->token_buffer + save_written;
enum cpp_token token = get_directive_token (pfile);
CPP_SET_WRITTEN (pfile, save_written);
if (token == CPP_NUMBER && *p >= '1' && *p <= '4' && p[1] == '\0')
{
*num = p[0] - '0';
return 1;
}
else
{
if (token != CPP_VSPACE && token != CPP_EOF && token != CPP_POP)
cpp_error (pfile, "invalid format `#line' command");
return 0;
}
}
/* Interpret #line command.
Note that the filename string (if any) is treated as if it were an
include filename. That means no escape handling. */
@ -1249,41 +1277,32 @@ do_line (pfile, keyword)
{
U_CHAR *fname = pfile->token_buffer + old_written + 1;
U_CHAR *end_name = CPP_PWRITTEN (pfile) - 1;
long num_start = CPP_WRITTEN (pfile);
int action_number = 0;
token = get_directive_token (pfile);
if (token != CPP_VSPACE && token != CPP_EOF && token != CPP_POP)
if (read_line_number (pfile, &action_number))
{
U_CHAR *p = pfile->token_buffer + num_start;
if (CPP_PEDANTIC (pfile))
cpp_pedwarn (pfile, "garbage at end of `#line' command");
if (token != CPP_NUMBER || *p < '0' || *p > '4' || p[1] != '\0')
if (action_number == 1)
{
cpp_error (pfile, "invalid format `#line' command");
goto bad_line_directive;
}
if (*p == '1')
file_change = enter_file;
else if (*p == '2')
file_change = leave_file;
else if (*p == '3')
ip->system_header_p = 1;
else /* if (*p == '4') */
ip->system_header_p = 2;
CPP_SET_WRITTEN (pfile, num_start);
token = get_directive_token (pfile);
p = pfile->token_buffer + num_start;
if (token == CPP_NUMBER && p[1] == '\0' && (*p == '3' || *p== '4'))
{
ip->system_header_p = *p == '3' ? 1 : 2;
token = get_directive_token (pfile);
read_line_number (pfile, &action_number);
}
if (token != CPP_VSPACE)
else if (action_number == 2)
{
cpp_error (pfile, "invalid format `#line' command");
goto bad_line_directive;
file_change = leave_file;
read_line_number (pfile, &action_number);
}
if (action_number == 3)
{
ip->system_header_p = 1;
read_line_number (pfile, &action_number);
}
if (action_number == 4)
{
ip->system_header_p = 2;
read_line_number (pfile, &action_number);
}
}