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cppfiles.c (_cpp_pop_file_buffer): Return void.

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* cppfiles.c (_cpp_pop_file_buffer): Return void.  Move
	file change and include code to _cpp_pop_buffer.
	* cpphash.h (struct pending_option): Predeclare.
	(struct cpp_reader): New member next_include_file.
	(_cpp_pop_file_buffer): Update.
	(_cpp_push_next_buffer): Update, rename.
	* cppinit.c (cpp_destroy): Free include chain and pending here.
	(cpp_finish_options): Simplify.
	(_cpp_push_next_buffer): Rename and clean up.
	* cpplib.c (cpp_pop_buffer): Move code from _cpp_pop_file_buffer.
	Clarify.
	* cppmacro.c (cpp_scan_nooutput): Set return_at_eof here.

From-SVN: r52621
This commit is contained in:
Neil Booth 2002-04-22 17:48:02 +00:00 committed by Neil Booth
parent 74b273d68f
commit af0d16cdec
6 changed files with 83 additions and 77 deletions
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15
gcc/ChangeLog
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@ -1,3 +1,18 @@
2002-04-22 Neil Booth <neil@daikokuya.demon.co.uk>
* cppfiles.c (_cpp_pop_file_buffer): Return void. Move
file change and include code to _cpp_pop_buffer.
* cpphash.h (struct pending_option): Predeclare.
(struct cpp_reader): New member next_include_file.
(_cpp_pop_file_buffer): Update.
(_cpp_push_next_buffer): Update, rename.
* cppinit.c (cpp_destroy): Free include chain and pending here.
(cpp_finish_options): Simplify.
(_cpp_push_next_buffer): Rename and clean up.
* cpplib.c (cpp_pop_buffer): Move code from _cpp_pop_file_buffer.
Clarify.
* cppmacro.c (cpp_scan_nooutput): Set return_at_eof here.
2002-04-22 Aldy Hernandez <aldyh@redhat.com>
* config/rs6000/altivec.h (vec_xor): Add variant for both args

18
gcc/cppfiles.c
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@ -761,14 +761,12 @@ _cpp_read_file (pfile, fname)
}
/* Do appropriate cleanup when a file INC's buffer is popped off the
input stack. Push the next -include file, if any remain. */
bool
input stack. */
void
_cpp_pop_file_buffer (pfile, inc)
cpp_reader *pfile;
struct include_file *inc;
{
bool pushed = false;
/* Record the inclusion-preventing macro, which could be NULL
meaning no controlling macro. */
if (pfile->mi_valid && inc->cmacro == NULL)
@ -780,18 +778,6 @@ _cpp_pop_file_buffer (pfile, inc)
inc->refcnt--;
if (inc->refcnt == 0 && DO_NOT_REREAD (inc))
purge_cache (inc);
/* Don't generate a callback for popping the main file. */
if (pfile->buffer)
{
_cpp_do_file_change (pfile, LC_LEAVE, 0, 0, 0);
/* Finally, push the next -included file, if any. */
if (!pfile->buffer->prev)
pushed = _cpp_push_next_buffer (pfile);
}
return pushed;
}
/* Returns the first place in the include chain to start searching for

10
gcc/cpphash.h
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@ -26,6 +26,7 @@ Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "hashtable.h"
struct directive; /* Deliberately incomplete. */
struct pending_option;
/* Test if a sign is valid within a preprocessing number. */
#define VALID_SIGN(c, prevc) \
@ -250,6 +251,11 @@ struct cpp_reader
/* If in_directive, the directive if known. */
const struct directive *directive;
/* The next -include-d file; NULL if they all are done. If it
points to NULL, the last one is in progress, and
_cpp_maybe_push_include_file has yet to restore the line map. */
struct pending_option **next_include_file;
/* Multiple inlcude optimisation. */
const cpp_hashnode *mi_cmacro;
const cpp_hashnode *mi_ind_cmacro;
@ -381,7 +387,7 @@ extern int _cpp_compare_file_date PARAMS ((cpp_reader *,
extern void _cpp_report_missing_guards PARAMS ((cpp_reader *));
extern void _cpp_init_includes PARAMS ((cpp_reader *));
extern void _cpp_cleanup_includes PARAMS ((cpp_reader *));
extern bool _cpp_pop_file_buffer PARAMS ((cpp_reader *,
extern void _cpp_pop_file_buffer PARAMS ((cpp_reader *,
struct include_file *));
/* In cppexp.c */
@ -396,7 +402,7 @@ extern int _cpp_equiv_tokens PARAMS ((const cpp_token *,
extern void _cpp_init_tokenrun PARAMS ((tokenrun *, unsigned int));
/* In cppinit.c. */
extern bool _cpp_push_next_buffer PARAMS ((cpp_reader *));
extern void _cpp_maybe_push_include_file PARAMS ((cpp_reader *));
/* In cpplib.c */
extern int _cpp_test_assertion PARAMS ((cpp_reader *, int *));

78
gcc/cppinit.c
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@ -554,6 +554,9 @@ cpp_destroy (pfile)
cpp_context *context, *contextn;
tokenrun *run, *runn;
free_chain (CPP_OPTION (pfile, pending)->include_head);
free (CPP_OPTION (pfile, pending));
while (CPP_BUFFER (pfile) != NULL)
_cpp_pop_buffer (pfile);
@ -1014,65 +1017,44 @@ cpp_finish_options (pfile)
for (p = CPP_OPTION (pfile, pending)->directive_head; p; p = p->next)
(*p->handler) (pfile, p->arg);
/* Scan -imacros files after command line defines, but before
files given with -include. */
while ((p = CPP_OPTION (pfile, pending)->imacros_head) != NULL)
{
if (push_include (pfile, p))
{
pfile->buffer->return_at_eof = true;
cpp_scan_nooutput (pfile);
}
CPP_OPTION (pfile, pending)->imacros_head = p->next;
free (p);
}
/* Scan -imacros files after -D, -U, but before -include.
pfile->next_include_file is NULL, so _cpp_pop_buffer does not
push -include files. */
for (p = CPP_OPTION (pfile, pending)->imacros_head; p; p = p->next)
if (push_include (pfile, p))
cpp_scan_nooutput (pfile);
pfile->next_include_file = &CPP_OPTION (pfile, pending)->include_head;
_cpp_maybe_push_include_file (pfile);
}
free_chain (CPP_OPTION (pfile, pending)->imacros_head);
free_chain (CPP_OPTION (pfile, pending)->directive_head);
_cpp_push_next_buffer (pfile);
}
/* Called to push the next buffer on the stack given by -include. If
there are none, free the pending structure and restore the line map
for the main file. */
bool
_cpp_push_next_buffer (pfile)
/* Push the next buffer on the stack given by -include, if any. */
void
_cpp_maybe_push_include_file (pfile)
cpp_reader *pfile;
{
bool pushed = false;
/* This is't pretty; we'd rather not be relying on this as a boolean
for reverting the line map. Further, we only free the chains in
this conditional, so an early call to cpp_finish / cpp_destroy
will leak that memory. */
if (CPP_OPTION (pfile, pending)
&& CPP_OPTION (pfile, pending)->imacros_head == NULL)
if (pfile->next_include_file)
{
while (!pushed)
struct pending_option *head = *pfile->next_include_file;
while (head && !push_include (pfile, head))
head = head->next;
if (head)
pfile->next_include_file = &head->next;
else
{
struct pending_option *p = CPP_OPTION (pfile, pending)->include_head;
if (p == NULL)
break;
if (! CPP_OPTION (pfile, preprocessed))
pushed = push_include (pfile, p);
CPP_OPTION (pfile, pending)->include_head = p->next;
free (p);
}
if (!pushed)
{
free (CPP_OPTION (pfile, pending));
CPP_OPTION (pfile, pending) = NULL;
/* Restore the line map for the main file. */
if (! CPP_OPTION (pfile, preprocessed))
_cpp_do_file_change (pfile, LC_RENAME,
pfile->line_maps.maps[0].to_file, 1, 0);
/* All done; restore the line map from <command line>. */
_cpp_do_file_change (pfile, LC_RENAME,
pfile->line_maps.maps[0].to_file, 1, 0);
/* Don't come back here again. */
pfile->next_include_file = NULL;
}
}
return pushed;
}
/* Use mkdeps.c to output dependency information. */

31
gcc/cpplib.c
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@ -1900,16 +1900,15 @@ cpp_push_buffer (pfile, buffer, len, from_stage3, return_at_eof)
return new;
}
/* If called from do_line, pops a single buffer. Otherwise pops all
buffers until a real file is reached. Generates appropriate
call-backs. */
/* Pops a single buffer, with a file change call-back if appropriate.
Then pushes the next -include file, if any remain. */
void
_cpp_pop_buffer (pfile)
cpp_reader *pfile;
{
cpp_buffer *buffer = pfile->buffer;
struct include_file *inc = buffer->inc;
struct if_stack *ifs;
bool pushed = false;
/* Walk back up the conditional stack till we reach its level at
entry to this file, issuing error messages. */
@ -1920,14 +1919,28 @@ _cpp_pop_buffer (pfile)
/* In case of a missing #endif. */
pfile->state.skipping = 0;
/* Update the reader's buffer before _cpp_do_file_change. */
/* _cpp_do_file_change expects pfile->buffer to be the new one. */
pfile->buffer = buffer->prev;
if (buffer->inc)
pushed = _cpp_pop_file_buffer (pfile, buffer->inc);
/* Free the buffer object now; we may want to push a new buffer
in _cpp_push_next_include_file. */
obstack_free (&pfile->buffer_ob, buffer);
if (!pushed)
obstack_free (&pfile->buffer_ob, buffer);
if (inc)
{
_cpp_pop_file_buffer (pfile, inc);
/* Don't generate a callback for popping the main file. */
if (pfile->buffer)
{
_cpp_do_file_change (pfile, LC_LEAVE, 0, 0, 0);
/* If this is the main file, there may be some -include
files left to push. */
if (!pfile->buffer->prev)
_cpp_maybe_push_include_file (pfile);
}
}
}
/* Enter all recognised directives in the hash table. */

8
gcc/cppmacro.c
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@ -1074,12 +1074,16 @@ cpp_sys_macro_p (pfile)
return node && node->value.macro && node->value.macro->syshdr;
}
/* Read each token in, until EOF. Directives are transparently
processed. */
/* Read each token in, until end of the current file. Directives are
transparently processed. */
void
cpp_scan_nooutput (pfile)
cpp_reader *pfile;
{
/* Request a CPP_EOF token at the end of this file, rather than
transparently continuing with the including file. */
pfile->buffer->return_at_eof = true;
while (cpp_get_token (pfile)->type != CPP_EOF)
;
}