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[SCM] GNU M4 source repository branch, master, updated. cvs-readonly-86-
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From: |
Eric Blake |
|
Subject: |
[SCM] GNU M4 source repository branch, master, updated. cvs-readonly-86-g6608fa6 |
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Date: |
Wed, 19 Mar 2008 02:04:34 +0000 |
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- Log -----------------------------------------------------------------
commit 6608fa6d084d320401f049b259adcf6b383eaa43
Author: Eric Blake <address@hidden>
Date: Tue Mar 18 14:00:39 2008 -0600
Stage 20b: make m4wrap obey POSIX fifo ordering.
* m4/m4module.h (m4_wrap_args): Add prototype.
* m4/m4private.h (enum m4__symbol_chain_type): Add M4__CHAIN_LOC.
(struct m4__symbol_chain): Add struct u_l.
* m4/input.c (m4_push_wrapup_init, m4_push_wrapup_finish): Use
new link type.
(composite_peek, composite_read, composite_clean): Handle location
link.
* m4/macro.c (m4_wrap_args): New function.
* modules/m4.c (m4wrap): Use it.
* doc/m4.texinfo (M4wrap): Sync with branch and POSIX.
(Extensions): Document extension of multiple arguments.
(Location, Improved m4wrap): Adjust example to match FIFO order.
* tests/builtins.at (wrap): Likewise.
* NEWS: Document this change.
Signed-off-by: Eric Blake <address@hidden>
commit 1761b0d68f12c701abfdcf0a36d955f787849e3c
Author: Eric Blake <address@hidden>
Date: Mon Mar 17 16:03:57 2008 -0600
Stage 20a: reduce unget's in input engine.
* m4/input.c (struct input_funcs): Alter read_func prototype.
(next_char, file_read, buildin_read, string_read, composite_read):
Add allow_argv parameter.
(init_builtin_token, init_argv_symbol): Require all prior input to
be consumed.
(m4_skip_line, match_input, consume_syntax): Adjust callers.
(m4__next_token): Consume first byte without peek.
Signed-off-by: Eric Blake <address@hidden>
commit 44c6706b4fa8c438df0f1ff44a5da6e2b3f8b294
Author: Eric Blake <address@hidden>
Date: Mon Mar 17 08:16:45 2008 -0600
Update for fresh bootstrap.
* ltdl/m4/gnulib-cache.m4: Updated copyright from upstream.
Signed-off-by: Eric Blake <address@hidden>
-----------------------------------------------------------------------
Summary of changes:
ChangeLog | 44 +++++++++++-
NEWS | 6 +-
doc/m4.texinfo | 62 ++++++++++++-----
ltdl/m4/gnulib-cache.m4 | 2 +-
m4/input.c | 179 ++++++++++++++++++++++++++++-------------------
m4/m4module.h | 2 +-
m4/m4private.h | 13 +++-
m4/macro.c | 68 ++++++++++++++++++
modules/m4.c | 8 +--
tests/builtins.at | 2 +-
10 files changed, 279 insertions(+), 107 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index 6e602e1..9d3c860 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,45 @@
+2008-03-18 Eric Blake <address@hidden>
+
+ Stage 20b: make m4wrap obey POSIX fifo ordering.
+ Improve input engine to support location changes within symbol
+ chains, then convert m4wrap to always build symbol chain.
+ Memory impact: none.
+ Speed impact: slight penalty, from more m4wrap bookkeeping.
+ * m4/m4module.h (m4_wrap_args): Add prototype.
+ * m4/m4private.h (enum m4__symbol_chain_type): Add M4__CHAIN_LOC.
+ (struct m4__symbol_chain): Add struct u_l.
+ * m4/input.c (m4_push_wrapup_init, m4_push_wrapup_finish): Use
+ new link type.
+ (composite_peek, composite_read, composite_clean): Handle location
+ link.
+ * m4/macro.c (m4_wrap_args): New function.
+ * modules/m4.c (m4wrap): Use it.
+ * doc/m4.texinfo (M4wrap): Sync with branch and POSIX.
+ (Extensions): Document extension of multiple arguments.
+ (Location, Improved m4wrap): Adjust example to match FIFO order.
+ * tests/builtins.at (wrap): Likewise.
+ * NEWS: Document this change.
+
+2008-03-17 Eric Blake <address@hidden>
+
+ Stage 20a: reduce unget's in input engine.
+ Now that out-of-range input placeholders like CHAR_BUILTIN are
+ consumed outside of next_char, next_token should always consume
+ rather than peek at the first character. Fewer peeks results in
+ less ungetc overhead.
+ Memory impact: none.
+ Speed impact: noticeable improvement, from fewer function calls.
+ * m4/input.c (struct input_funcs): Alter read_func prototype.
+ (next_char, file_read, buildin_read, string_read, composite_read):
+ Add allow_argv parameter.
+ (init_builtin_token, init_argv_symbol): Require all prior input to
+ be consumed.
+ (m4_skip_line, match_input, consume_syntax): Adjust callers.
+ (m4__next_token): Consume first byte without peek.
+
+ Update for fresh bootstrap.
+ * ltdl/m4/gnulib-cache.m4: Updated copyright from upstream.
+
2008-03-15 Eric Blake <address@hidden>
Document join, in order to fix bug in m4wrap example.
@@ -6,7 +48,7 @@
* Makefile.am (EXTRA_DIST): Add new files.
* doc/m4.texinfo (Improved m4wrap): New node.
(Defn, Location): Enhance tests.
- (Shift): Document the composit macro join.
+ (Shift): Document the composite macro join.
(Incompatibilities): Move documentation of LIFO vs. FIFO...
(M4wrap): ...here, to match improved example.
diff --git a/NEWS b/NEWS
index 6e2fa40..eea5287 100644
--- a/NEWS
+++ b/NEWS
@@ -91,8 +91,6 @@ promoted to 2.0.
- FIXME: POSIX recommends using ${10} instead of $10 for the tenth
positional argument. We should deprecate $10.
- - FIXME: `m4wrap' semantics need an update to FIFO.
-
** Removed builtins
*** The experimental `epatsubst' and `eregexp' builtins have been removed
@@ -216,6 +214,10 @@ promoted to 2.0.
** Fix regression introduced in 1.4.10b where using `builtin' or `indir'
to perform nested `shift' calls triggered an assertion failure.
+** Fix the `m4wrap' builtin to accumulate wrapped text in FIFO order, as
+ required by POSIX. The manual mentions a way to restore the LIFO order
+ present in earlier GNU M4 versions.
+
** Enhance the `ifdef', `ifelse', and `shift' builtins, as well as all
user macros, to transparently handle builtin tokens generated by `defn'.
diff --git a/doc/m4.texinfo b/doc/m4.texinfo
index 175d923..6e836f6 100644
--- a/doc/m4.texinfo
+++ b/doc/m4.texinfo
@@ -5204,10 +5204,18 @@ normal input has been exhausted. This feature is
normally used to
initiate cleanup actions before normal exit, e.g., deleting temporary
files.
address@hidden {Builtin (m4)} m4wrap (@var{string}, @dots{})
To save input text, use the builtin @code{m4wrap}:
-which stores @var{string} and the rest of the arguments in a safe place,
-to be reread when end of input is reached.
+
address@hidden {Builtin (m4)} m4wrap (@var{string}, @dots{})
+Stores @var{string} in a safe place, to be reread when end of input is
+reached. As a @acronym{GNU} extension, additional arguments are
+concatenated with a space to the @var{string}.
+
+Successive invocations of @code{m4wrap} accumulate saved text in
+first-in, first-out order, as required by @acronym{POSIX}.
+
+The expansion of @code{m4wrap} is void.
+The macro @code{m4wrap} is recognized only with parameters.
@end deffn
@example
@@ -5225,16 +5233,27 @@ This is the first and last normal input line.
The saved input is only reread when the end of normal input is seen, and
not if @code{m4exit} is used to exit @code{m4}.
address@hidden FIXME: this contradicts POSIX, which requires that "If the
address@hidden m4wrap macro is used multiple times, the arguments specified
address@hidden shall be processed in the order in which the m4wrap macros were
address@hidden processed."
-It is safe to call @code{m4wrap} from saved text, but then the order in
-which the saved text is reread is undefined. If @code{m4wrap} is not used
-recursively, the saved pieces of text are reread in the opposite order
-in which they were saved (LIFO---last in, first out).
+It is safe to call @code{m4wrap} from wrapped text, where all the
+recursively wrapped text is deferred until the current wrapped text is
+exhausted. As of M4 1.4.11, when @code{m4wrap} is not used recursively,
+the saved pieces of text are reread in the same order in which they were
+saved (FIFO---first in, first out), as required by @acronym{POSIX}.
+
address@hidden
+m4wrap(`1
+')
address@hidden
+m4wrap(`2', `3
+')
address@hidden
+^D
address@hidden
address@hidden 3
address@hidden example
-It is possible to emulate @acronym{POSIX} behavior even
+However, earlier versions had reverse ordering (LIFO---last in, first
+out), as this behavior is more like the semantics of the C function
address@hidden It is possible to emulate @acronym{POSIX} behavior even
with older versions of @acronym{GNU} M4 by including the file
@address@hidden/@/examples/@/wrapfifo.m4} from the
distribution:
@@ -5310,13 +5329,13 @@ Invocations of @code{m4wrap} at the same recursion
level are
concatenated and rescanned as usual:
@example
-define(`aa', `AA
+define(`ab', `AB
')
@result{}
-m4wrap(`a')m4wrap(`a')
+m4wrap(`a')m4wrap(`b')
@result{}
^D
address@hidden
address@hidden
@end example
@noindent
@@ -7778,9 +7797,9 @@ m4wrap(`__line__
')
@result{}
^D
address@hidden
@result{}6
@result{}6
address@hidden
@end example
The @address@hidden macro behaves like @samp{$0} in shell
@@ -8287,6 +8306,15 @@ once, but @acronym{GNU} @code{m4} correctly handles
multiple instances
of @samp{-} on the command line.
@item
address@hidden requires @code{m4wrap} (@pxref{M4wrap}) to act in FIFO
+(first-in, first-out) order, and most other implementations obey this.
+However, versions of @acronym{GNU} @code{m4} earlier than 1.4.11 used
+LIFO order. Furthermore, @acronym{POSIX} states that only the first
+argument to @code{m4wrap} is saved for later evaluation, but
address@hidden @code{m4} saves and processes all arguments, with output
+separated by spaces.
+
address@hidden
@acronym{POSIX} states that builtins that require arguments, but are
called without arguments, have undefined behavior. Traditional
implementations simply behave as though empty strings had been passed.
@@ -8943,8 +8971,8 @@ builtin(`m4wrap', ``'define(`bar',
``$0:'-$1-$*-$#-')bar(`a', `b')
')
@result{}
^D
address@hidden:-a-a,b-2-
@result{}m4wrap0:---0-
address@hidden:-a-a,b-2-
@end example
Additionally, the computation of @code{_m4wrap_level} and creation of
diff --git a/ltdl/m4/gnulib-cache.m4 b/ltdl/m4/gnulib-cache.m4
index 882db83..958e7b3 100644
--- a/ltdl/m4/gnulib-cache.m4
+++ b/ltdl/m4/gnulib-cache.m4
@@ -1,4 +1,4 @@
-# Copyright (C) 2004-2007 Free Software Foundation, Inc.
+# Copyright (C) 2002-2008 Free Software Foundation, Inc.
#
# This file is free software, distributed under the terms of the GNU
# General Public License. As a special exception to the GNU General
diff --git a/m4/input.c b/m4/input.c
index 7d27dad..a7f1da9 100644
--- a/m4/input.c
+++ b/m4/input.c
@@ -93,20 +93,24 @@
between input blocks must update the context accordingly. */
static int file_peek (m4_input_block *, m4 *, bool);
-static int file_read (m4_input_block *, m4 *, bool, bool);
+static int file_read (m4_input_block *, m4 *, bool, bool,
+ bool);
static void file_unget (m4_input_block *, int);
static bool file_clean (m4_input_block *, m4 *, bool);
static void file_print (m4_input_block *, m4 *, m4_obstack *);
static int builtin_peek (m4_input_block *, m4 *, bool);
-static int builtin_read (m4_input_block *, m4 *, bool, bool);
+static int builtin_read (m4_input_block *, m4 *, bool, bool,
+ bool);
static void builtin_unget (m4_input_block *, int);
static void builtin_print (m4_input_block *, m4 *, m4_obstack *);
static int string_peek (m4_input_block *, m4 *, bool);
-static int string_read (m4_input_block *, m4 *, bool, bool);
+static int string_read (m4_input_block *, m4 *, bool, bool,
+ bool);
static void string_unget (m4_input_block *, int);
static void string_print (m4_input_block *, m4 *, m4_obstack *);
static int composite_peek (m4_input_block *, m4 *, bool);
-static int composite_read (m4_input_block *, m4 *, bool, bool);
+static int composite_read (m4_input_block *, m4 *, bool, bool,
+ bool);
static void composite_unget (m4_input_block *, int);
static bool composite_clean (m4_input_block *, m4 *, bool);
static void composite_print (m4_input_block *, m4 *, m4_obstack *);
@@ -115,7 +119,7 @@ static void init_builtin_token (m4 *,
m4_symbol_value *);
static void append_quote_token (m4 *, m4_obstack *,
m4_symbol_value *);
static bool match_input (m4 *, const char *, bool);
-static int next_char (m4 *, bool, bool);
+static int next_char (m4 *, bool, bool, bool);
static int peek_char (m4 *, bool);
static bool pop_input (m4 *, bool);
static void unget_input (int);
@@ -138,9 +142,11 @@ struct input_funcs
/* Read input, return an unsigned char, CHAR_BUILTIN if it is a
builtin, or CHAR_RETRY if none available. If ALLOW_QUOTE, then
- CHAR_QUOTE may be returned. If SAFE, then do not alter the
- current file or line. */
- int (*read_func) (m4_input_block *, m4 *, bool allow_quote, bool safe);
+ CHAR_QUOTE may be returned. If ALLOW_ARGV, then CHAR_ARGV may be
+ returned. If SAFE, then do not alter the current file or
+ line. */
+ int (*read_func) (m4_input_block *, m4 *, bool allow_quote,
+ bool allow_argv, bool safe);
/* Unread a single unsigned character or CHAR_BUILTIN, must be the
same character previously read by read_func. */
@@ -198,11 +204,7 @@ static m4_obstack token_stack;
/* Obstack for storing input file names. */
static m4_obstack file_names;
-/* Wrapup input stack.
-
- FIXME - m4wrap should be FIFO, which implies a queue, not a stack.
- While fixing this, m4wrap should also remember what the current
- file and line are for each chunk of wrapped text. */
+/* Wrapup input stack. */
static m4_obstack *wrapup_stack;
/* Current stack, from input or wrapup. */
@@ -268,7 +270,7 @@ file_peek (m4_input_block *me, m4 *context M4_GNUC_UNUSED,
static int
file_read (m4_input_block *me, m4 *context, bool allow_quote M4_GNUC_UNUSED,
- bool safe M4_GNUC_UNUSED)
+ bool allow_argv M4_GNUC_UNUSED, bool safe M4_GNUC_UNUSED)
{
int ch;
@@ -394,7 +396,8 @@ builtin_peek (m4_input_block *me, m4 *context
M4_GNUC_UNUSED,
static int
builtin_read (m4_input_block *me, m4 *context M4_GNUC_UNUSED,
- bool allow_quote M4_GNUC_UNUSED, bool safe M4_GNUC_UNUSED)
+ bool allow_quote M4_GNUC_UNUSED, bool allow_argv M4_GNUC_UNUSED,
+ bool safe M4_GNUC_UNUSED)
{
/* Not consumed here - wait until init_builtin_token. */
return me->u.builtin ? CHAR_BUILTIN : CHAR_RETRY;
@@ -453,7 +456,8 @@ string_peek (m4_input_block *me, m4 *context M4_GNUC_UNUSED,
static int
string_read (m4_input_block *me, m4 *context M4_GNUC_UNUSED,
- bool allow_quote M4_GNUC_UNUSED, bool safe M4_GNUC_UNUSED)
+ bool allow_quote M4_GNUC_UNUSED, bool allow_argv M4_GNUC_UNUSED,
+ bool safe M4_GNUC_UNUSED)
{
if (!me->u.u_s.len)
return CHAR_RETRY;
@@ -747,6 +751,8 @@ composite_peek (m4_input_block *me, m4 *context, bool
allow_argv)
chain->u.u_a.comma = true;
m4_push_string_finish ();
return peek_char (context, allow_argv);
+ case M4__CHAIN_LOC:
+ break;
default:
assert (!"composite_peek");
abort ();
@@ -757,9 +763,11 @@ composite_peek (m4_input_block *me, m4 *context, bool
allow_argv)
}
static int
-composite_read (m4_input_block *me, m4 *context, bool allow_quote, bool safe)
+composite_read (m4_input_block *me, m4 *context, bool allow_quote,
+ bool allow_argv, bool safe)
{
m4__symbol_chain *chain = me->u.u_c.chain;
+ size_t argc;
while (chain)
{
if (allow_quote && chain->quote_age == m4__quote_age (M4SYNTAX))
@@ -782,7 +790,8 @@ composite_read (m4_input_block *me, m4 *context, bool
allow_quote, bool safe)
return CHAR_BUILTIN;
break;
case M4__CHAIN_ARGV:
- if (chain->u.u_a.index == m4_arg_argc (chain->u.u_a.argv))
+ argc = m4_arg_argc (chain->u.u_a.argv);
+ if (chain->u.u_a.index == argc)
{
m4__arg_adjust_refcount (context, chain->u.u_a.argv, false);
break;
@@ -792,6 +801,11 @@ composite_read (m4_input_block *me, m4 *context, bool
allow_quote, bool safe)
chain->u.u_a.comma = false;
return ','; /* FIXME - support M4_SYNTAX_COMMA. */
}
+ /* Only return a reference in the quoting is correct and the
+ reference has more than one argument left. */
+ if (allow_argv && chain->quote_age == m4__quote_age (M4SYNTAX)
+ && chain->u.u_a.quotes && chain->u.u_a.index + 1 < argc)
+ return CHAR_ARGV;
/* Rather than directly parse argv here, we push another
input block containing the next unparsed argument from
argv. */
@@ -804,7 +818,13 @@ composite_read (m4_input_block *me, m4 *context, bool
allow_quote, bool safe)
chain->u.u_a.index++;
chain->u.u_a.comma = true;
m4_push_string_finish ();
- return next_char (context, allow_quote, !safe);
+ return next_char (context, allow_quote, allow_argv, !safe);
+ case M4__CHAIN_LOC:
+ me->file = chain->u.u_l.file;
+ me->line = chain->u.u_l.line;
+ input_change = true;
+ me->u.u_c.chain = chain->next;
+ return next_char (context, allow_quote, allow_argv, !safe);
default:
assert (!"composite_read");
abort ();
@@ -869,6 +889,8 @@ composite_clean (m4_input_block *me, m4 *context, bool
cleanup)
}
m4__arg_adjust_refcount (context, chain->u.u_a.argv, false);
break;
+ case M4__CHAIN_LOC:
+ return false;
default:
assert (!"composite_clean");
abort ();
@@ -985,14 +1007,36 @@ m4_obstack *
m4_push_wrapup_init (m4 *context)
{
m4_input_block *i;
+ m4__symbol_chain *chain;
- i = (m4_input_block *) obstack_alloc (wrapup_stack, sizeof *i);
- i->prev = wsp;
-
- i->funcs = &string_funcs;
- i->file = m4_get_current_file (context);
- i->line = m4_get_current_line (context);
- wsp = i;
+ assert (obstack_object_size (wrapup_stack) == 0);
+ if (wsp)
+ {
+ i = wsp;
+ assert (i->funcs == &composite_funcs && i->u.u_c.end
+ && i->u.u_c.end->type != M4__CHAIN_LOC);
+ }
+ else
+ {
+ i = (m4_input_block *) obstack_alloc (wrapup_stack, sizeof *i);
+ i->prev = wsp;
+ i->funcs = &composite_funcs;
+ i->file = m4_get_current_file (context);
+ i->line = m4_get_current_line (context);
+ i->u.u_c.chain = i->u.u_c.end = NULL;
+ wsp = i;
+ }
+ chain = (m4__symbol_chain *) obstack_alloc (wrapup_stack, sizeof *chain);
+ if (i->u.u_c.end)
+ i->u.u_c.end->next = chain;
+ else
+ i->u.u_c.chain = chain;
+ i->u.u_c.end = chain;
+ chain->next = NULL;
+ chain->type = M4__CHAIN_LOC;
+ chain->quote_age = 0;
+ chain->u.u_l.file = m4_get_current_file (context);
+ chain->u.u_l.line = m4_get_current_line (context);
return wrapup_stack;
}
@@ -1000,17 +1044,8 @@ m4_push_wrapup_init (m4 *context)
void
m4_push_wrapup_finish (void)
{
- m4_input_block *i = wsp;
- if (obstack_object_size (wrapup_stack) == 0)
- {
- wsp = i->prev;
- obstack_free (wrapup_stack, i);
- }
- else
- {
- i->u.u_s.len = obstack_object_size (wrapup_stack);
- i->u.u_s.str = (char *) obstack_finish (wrapup_stack);
- }
+ m4__make_text_link (wrapup_stack, &wsp->u.u_c.chain, &wsp->u.u_c.end);
+ assert (wsp->u.u_c.end->type != M4__CHAIN_LOC);
}
@@ -1085,9 +1120,6 @@ m4_pop_wrapup (m4 *context)
static void
init_builtin_token (m4 *context, m4_symbol_value *token)
{
- int ch = next_char (context, false, true);
- assert (ch == CHAR_BUILTIN);
-
if (isp->funcs == &builtin_funcs)
{
assert (isp->u.builtin);
@@ -1159,11 +1191,10 @@ init_argv_symbol (m4 *context, m4_obstack *obs,
m4_symbol_value *value)
{
m4__symbol_chain *src_chain;
m4__symbol_chain *chain;
- int ch = next_char (context, true, true);
+ int ch;
const m4_string_pair *comments = m4_get_syntax_comments (M4SYNTAX);
- assert (ch == CHAR_QUOTE && value->type == M4_SYMBOL_VOID
- && isp->funcs == &composite_funcs
+ assert (value->type == M4_SYMBOL_VOID && isp->funcs == &composite_funcs
&& isp->u.u_c.chain->type == M4__CHAIN_ARGV
&& obs && obstack_object_size (obs) == 0);
@@ -1201,7 +1232,7 @@ init_argv_symbol (m4 *context, m4_obstack *obs,
m4_symbol_value *value)
|| (!m4_has_syntax (M4SYNTAX, *comments->str1,
M4_SYNTAX_COMMA | M4_SYNTAX_CLOSE)
&& *comments->str1 != *src_chain->u.u_a.quotes->str1));
- ch = peek_char (context, false);
+ ch = peek_char (context, true);
if (!m4_has_syntax (M4SYNTAX, ch, M4_SYNTAX_COMMA | M4_SYNTAX_CLOSE))
{
isp->u.u_c.chain = src_chain;
@@ -1217,10 +1248,12 @@ init_argv_symbol (m4 *context, m4_obstack *obs,
m4_symbol_value *value)
next_char () is used to read and advance the input to the next
character. If ALLOW_QUOTE, and the current input matches the
current quote age, return CHAR_QUOTE and leave consumption of data
- for append_quote_token. If RETRY, then avoid returning CHAR_RETRY
- by popping input. */
+ for append_quote_token; otherwise, if ALLOW_ARGV, and the current
+ input matches an argv reference with the correct quoting, return
+ CHAR_ARGV and leave consumption of data for init_argv_symbol. If
+ RETRY, then avoid returning CHAR_RETRY by popping input. */
static int
-next_char (m4 *context, bool allow_quote, bool retry)
+next_char (m4 *context, bool allow_quote, bool allow_argv, bool retry)
{
int ch;
@@ -1240,7 +1273,8 @@ next_char (m4 *context, bool allow_quote, bool retry)
}
assert (isp->funcs->read_func);
- while (((ch = isp->funcs->read_func (isp, context, allow_quote, !retry))
+ while (((ch = isp->funcs->read_func (isp, context, allow_quote,
+ allow_argv, !retry))
!= CHAR_RETRY)
|| !retry)
{
@@ -1273,7 +1307,7 @@ peek_char (m4 *context, bool allow_argv)
if (ch != CHAR_RETRY)
{
/* if (IS_IGNORE (ch)) */
-/* return next_char (context, false, true); */
+/* return next_char (context, false, true, true); */
return ch;
}
@@ -1283,7 +1317,7 @@ peek_char (m4 *context, bool allow_argv)
/* The function unget_input () puts back a character on the input
stack, using an existing input_block if possible. This is not safe
- to call except immediately after next_char(context, allow, false). */
+ to call except immediately after next_char(context, aq, aa, false). */
static void
unget_input (int ch)
{
@@ -1301,7 +1335,8 @@ m4_skip_line (m4 *context, const char *name)
const char *file = m4_get_current_file (context);
int line = m4_get_current_line (context);
- while ((ch = next_char (context, false, true)) != CHAR_EOF && ch != '\n')
+ while ((ch = next_char (context, false, false, true)) != CHAR_EOF
+ && ch != '\n')
;
if (ch == CHAR_EOF)
/* current_file changed; use the previous value we cached. */
@@ -1346,14 +1381,14 @@ match_input (m4 *context, const char *s, bool consume)
if (s[1] == '\0')
{
if (consume)
- next_char (context, false, true);
+ next_char (context, false, false, true);
return true; /* short match */
}
- next_char (context, false, true);
+ next_char (context, false, false, true);
for (n = 1, t = s++; (ch = peek_char (context, false)) == to_uchar (*s++); )
{
- next_char (context, false, true);
+ next_char (context, false, false, true);
n++;
if (*s == '\0') /* long match */
{
@@ -1391,29 +1426,29 @@ static bool
consume_syntax (m4 *context, m4_obstack *obs, unsigned int syntax)
{
int ch;
- bool allow_quote = m4__safe_quotes (M4SYNTAX);
+ bool allow = m4__safe_quotes (M4SYNTAX);
assert (syntax);
while (1)
{
/* It is safe to call next_char without first checking
peek_char, except at input source boundaries, which we detect
by CHAR_RETRY. We exploit the fact that CHAR_EOF,
- CHAR_BUILTIN, and CHAR_QUOTE do not satisfy any syntax
- categories. */
- while ((ch = next_char (context, allow_quote, false)) != CHAR_RETRY
+ CHAR_BUILTIN, CHAR_QUOTE, and CHAR_ARGV do not satisfy any
+ syntax categories. */
+ while ((ch = next_char (context, allow, allow, false)) != CHAR_RETRY
&& m4_has_syntax (M4SYNTAX, ch, syntax))
{
assert (ch < CHAR_EOF);
obstack_1grow (obs, ch);
}
- if (ch == CHAR_RETRY || ch == CHAR_QUOTE)
+ if (ch == CHAR_RETRY || ch == CHAR_QUOTE || ch == CHAR_ARGV)
{
ch = peek_char (context, false);
if (m4_has_syntax (M4SYNTAX, ch, syntax))
{
assert (ch < CHAR_EOF);
obstack_1grow (obs, ch);
- next_char (context, false, true);
+ next_char (context, false, false, true);
continue;
}
return ch == CHAR_EOF;
@@ -1499,15 +1534,14 @@ m4__next_token (m4 *context, m4_symbol_value *token,
int *line,
do {
obstack_free (&token_stack, token_bottom);
- /* Must consume an input character, but not until CHAR_BUILTIN is
- handled. */
- ch = peek_char (context, allow_argv && m4__quote_age (M4SYNTAX));
+ /* Must consume an input character. */
+ ch = next_char (context, false, allow_argv && m4__quote_age (M4SYNTAX),
+ true);
if (ch == CHAR_EOF) /* EOF */
{
#ifdef DEBUG_INPUT
xfprintf (stderr, "next_token -> EOF\n");
#endif
- next_char (context, false, true);
return M4_TOKEN_EOF;
}
@@ -1528,15 +1562,13 @@ m4__next_token (m4 *context, m4_symbol_value *token,
int *line,
return M4_TOKEN_ARGV;
}
- /* Consume character we already peeked at. */
- next_char (context, false, true);
file = m4_get_current_file (context);
*line = m4_get_current_line (context);
if (m4_has_syntax (M4SYNTAX, ch, M4_SYNTAX_ESCAPE))
{ /* ESCAPED WORD */
obstack_1grow (&token_stack, ch);
- if ((ch = next_char (context, false, true)) < CHAR_EOF)
+ if ((ch = next_char (context, false, false, true)) < CHAR_EOF)
{
obstack_1grow (&token_stack, ch);
if (m4_has_syntax (M4SYNTAX, ch, M4_SYNTAX_ALPHA))
@@ -1564,7 +1596,8 @@ m4__next_token (m4 *context, m4_symbol_value *token, int
*line,
type = M4_TOKEN_STRING;
while (1)
{
- ch = next_char (context, obs && m4__quote_age (M4SYNTAX), true);
+ ch = next_char (context, obs && m4__quote_age (M4SYNTAX), false,
+ true);
if (ch == CHAR_EOF)
m4_error_at_line (context, EXIT_FAILURE, 0, file, *line, caller,
_("end of file in string"));
@@ -1581,7 +1614,7 @@ m4__next_token (m4 *context, m4_symbol_value *token, int
*line,
ch = peek_char (context, false);
if (m4_has_syntax (M4SYNTAX, ch, M4_SYNTAX_RQUOTE))
{
- ch = next_char (context, false, true);
+ ch = next_char (context, false, false, true);
#ifdef DEBUG_INPUT
m4_print_token (context, "next_token", M4_TOKEN_MACDEF,
token);
@@ -1623,7 +1656,7 @@ m4__next_token (m4 *context, m4_symbol_value *token, int
*line,
assert (!m4__quote_age (M4SYNTAX));
while (1)
{
- ch = next_char (context, false, true);
+ ch = next_char (context, false, false, true);
if (ch == CHAR_EOF)
m4_error_at_line (context, EXIT_FAILURE, 0, file, *line, caller,
_("end of file in string"));
@@ -1641,7 +1674,7 @@ m4__next_token (m4 *context, m4_symbol_value *token, int
*line,
if (MATCH (context, ch, context->syntax->quote.str2,
false))
{
- ch = next_char (context, false, true);
+ ch = next_char (context, false, false, true);
MATCH (context, ch, context->syntax->quote.str2, true);
#ifdef DEBUG_INPUT
m4_print_token (context, "next_token", M4_TOKEN_MACDEF,
@@ -1681,7 +1714,7 @@ m4__next_token (m4 *context, m4_symbol_value *token, int
*line,
obstack_1grow (obs_safe, ch);
while (1)
{
- ch = next_char (context, false, true);
+ ch = next_char (context, false, false, true);
if (ch == CHAR_EOF)
m4_error_at_line (context, EXIT_FAILURE, 0, file, *line, caller,
_("end of file in comment"));
@@ -1713,7 +1746,7 @@ m4__next_token (m4 *context, m4_symbol_value *token, int
*line,
context->syntax->comm.len1);
while (1)
{
- ch = next_char (context, false, true);
+ ch = next_char (context, false, false, true);
if (ch == CHAR_EOF)
m4_error_at_line (context, EXIT_FAILURE, 0, file, *line, caller,
_("end of file in comment"));
diff --git a/m4/m4module.h b/m4/m4module.h
index 6cbe185..357baca 100644
--- a/m4/m4module.h
+++ b/m4/m4module.h
@@ -1,5 +1,4 @@
/* GNU m4 -- A simple macro processor
-
Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 1999, 2000, 2003,
2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
@@ -374,6 +373,7 @@ extern void m4_push_arg (m4 *, m4_obstack *,
m4_macro_args *,
size_t);
extern void m4_push_args (m4 *, m4_obstack *, m4_macro_args *,
bool, bool);
+extern void m4_wrap_args (m4 *, m4_macro_args *);
/* --- RUNTIME DEBUGGING --- */
diff --git a/m4/m4private.h b/m4/m4private.h
index 5ff7c95..86f18e8 100644
--- a/m4/m4private.h
+++ b/m4/m4private.h
@@ -1,7 +1,6 @@
/* GNU m4 -- A simple macro processor
-
- Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 1998, 1999, 2004, 2005,
- 2006, 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 1998, 1999, 2004,
+ 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
This file is part of GNU M4.
@@ -212,7 +211,8 @@ enum m4__symbol_chain_type
{
M4__CHAIN_STR, /* Link contains a string, u.u_s is valid. */
M4__CHAIN_FUNC, /* Link contains builtin token, u.builtin is valid. */
- M4__CHAIN_ARGV /* Link contains a $@ reference, u.u_a is valid. */
+ M4__CHAIN_ARGV, /* Link contains a $@ reference, u.u_a is valid. */
+ M4__CHAIN_LOC /* Link contains m4wrap location, u.u_l is
valid. */
};
/* Composite symbols are built of a linked list of chain objects. */
@@ -240,6 +240,11 @@ struct m4__symbol_chain
bool_bitfield has_func : 1; /* True if argv includes func. */
const m4_string_pair *quotes; /* NULL for $*, quotes for
address@hidden */
} u_a; /* M4__CHAIN_ARGV. */
+ struct
+ {
+ const char *file; /* File where subsequent links originate. */
+ int line; /* Line where subsequent links originate. */
+ } u_l; /* M4__CHAIN_LOC. */
} u;
};
diff --git a/m4/macro.c b/m4/macro.c
index d03f551..6d1976d 100644
--- a/m4/macro.c
+++ b/m4/macro.c
@@ -1670,6 +1670,74 @@ m4_push_args (m4 *context, m4_obstack *obs,
m4_macro_args *argv, bool skip,
arg_mark (argv);
}
+/* Push arguments from ARGV onto the wrap stack for later rescanning.
+ If GNU extensions are disabled, only the first argument is pushed;
+ otherwise, all arguments are pushed and separated with a space. */
+void
+m4_wrap_args (m4 *context, m4_macro_args *argv)
+{
+ size_t i;
+ m4_obstack *obs;
+ m4_symbol_value *value;
+ m4__symbol_chain *chain;
+ size_t limit = m4_get_posixly_correct_opt (context) ? 2 : argv->argc;
+
+ if (limit == 2 && m4_arg_empty (argv, 1))
+ return;
+
+ obs = m4_push_wrapup_init (context);
+ for (i = 1; i < limit; i++)
+ {
+ if (i != 1)
+ obstack_1grow (obs, ' ');
+ value = m4_arg_symbol (argv, i);
+ switch (value->type)
+ {
+ case M4_SYMBOL_TEXT:
+ obstack_grow (obs, m4_get_symbol_value_text (value),
+ m4_get_symbol_value_len (value));
+ break;
+ case M4_SYMBOL_FUNC:
+ /* TODO allow builtins. */
+ assert (false);
+ break;
+ case M4_SYMBOL_COMP:
+ chain = value->u.u_c.chain;
+ while (chain)
+ {
+ switch (chain->type)
+ {
+ case M4__CHAIN_STR:
+ obstack_grow (obs, chain->u.u_s.str, chain->u.u_s.len);
+ break;
+ case M4__CHAIN_FUNC:
+ /* TODO allow builtins. */
+ assert (false);
+ break;
+ case M4__CHAIN_ARGV:
+ m4_arg_print (context, obs, chain->u.u_a.argv,
+ chain->u.u_a.index,
+ m4__quote_cache (M4SYNTAX, NULL,
+ chain->quote_age,
+ chain->u.u_a.quotes),
+ chain->u.u_a.flatten, NULL, NULL, false,
+ false);
+ break;
+ default:
+ assert (!"m4_wrap_args");
+ abort ();
+ }
+ chain = chain->next;
+ }
+ break;
+ default:
+ assert (!"m4_wrap_args");
+ abort ();
+ }
+ }
+ m4_push_wrapup_finish ();
+}
+
/* Define these last, so that earlier uses can benefit from the macros
in m4private.h. */
diff --git a/modules/m4.c b/modules/m4.c
index 359839b..02ac090 100644
--- a/modules/m4.c
+++ b/modules/m4.c
@@ -833,13 +833,7 @@ M4BUILTIN_HANDLER (m4exit)
version only the first. */
M4BUILTIN_HANDLER (m4wrap)
{
- obs = m4_push_wrapup_init (context);
- if (m4_get_posixly_correct_opt (context))
- obstack_grow (obs, M4ARG (1), M4ARGLEN (1));
- else
- /* TODO allow pushing builtins. */
- m4_arg_print (context, obs, argv, 1, NULL, true, " ", NULL, false, false);
- m4_push_wrapup_finish ();
+ m4_wrap_args (context, argv);
}
/* Enable tracing of all specified macros, or all, if none is specified.
diff --git a/tests/builtins.at b/tests/builtins.at
index 08c881b..34143a1 100644
--- a/tests/builtins.at
+++ b/tests/builtins.at
@@ -1227,8 +1227,8 @@ No. 33: The End.
AT_CHECK_M4([wrap.m4], 0,
[[
No. 33: The End.
-Wrapper no. 2
Wrapper no. 1
+Wrapper no. 2
Wrapper no. 3
Wrapper no. 4
]])
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