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/* Copyright 2001,2005-2006,2009-2012,2016,2018-2019
Free Software Foundation, Inc.
This file is part of Guile.
Guile is free software: you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
Guile is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public
License along with Guile. If not, see
<https://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include "gsubr.h"
#include "list.h"
#include "pairs.h"
#include "ports.h"
#include "private-options.h"
#include "strings.h"
#include "threads.h"
#include "deprecation.h"
struct issued_warning {
struct issued_warning *prev;
const char *message;
};
static scm_i_pthread_mutex_t warn_lock = SCM_I_PTHREAD_MUTEX_INITIALIZER;
static struct issued_warning *issued_warnings;
static int print_summary = 0;
void
scm_c_issue_deprecation_warning (const char *msg)
{
if (!SCM_WARN_DEPRECATED)
print_summary = 1;
else
{
struct issued_warning *iw;
scm_i_pthread_mutex_lock (&warn_lock);
for (iw = issued_warnings; iw; iw = iw->prev)
if (!strcmp (iw->message, msg))
{
msg = NULL;
break;
}
if (msg)
{
msg = strdup (msg);
iw = malloc (sizeof (struct issued_warning));
if (msg == NULL || iw == NULL)
/* Nothing sensible to do if you can't allocate this small
amount of memory. */
abort ();
iw->message = msg;
iw->prev = issued_warnings;
issued_warnings = iw;
}
scm_i_pthread_mutex_unlock (&warn_lock);
/* All this dance is to avoid printing to a port inside a mutex,
which could recurse and deadlock. */
if (msg)
{
scm_puts (msg, scm_current_warning_port ());
scm_newline (scm_current_warning_port ());
}
}
}
void
scm_c_issue_deprecation_warning_fmt (const char *msg, ...)
{
va_list ap;
char buf[512];
va_start (ap, msg);
vsnprintf (buf, 511, msg, ap);
va_end (ap);
buf[511] = '\0';
scm_c_issue_deprecation_warning (buf);
}
SCM_DEFINE(scm_issue_deprecation_warning,
"issue-deprecation-warning", 0, 0, 1,
(SCM msgs),
"Output @var{msgs} to @code{(current-error-port)} when this "
"is the first call to @code{issue-deprecation-warning} with "
"this specific @var{msgs}. Do nothing otherwise. "
"The argument @var{msgs} should be a list of strings; "
"they are printed in turn, each one followed by a newline.")
#define FUNC_NAME s_scm_issue_deprecation_warning
{
if (!SCM_WARN_DEPRECATED)
print_summary = 1;
else
{
SCM nl = scm_from_utf8_string ("\n");
SCM msgs_nl = SCM_EOL;
char *c_msgs;
while (scm_is_pair (msgs))
{
if (!scm_is_null (msgs_nl))
msgs_nl = scm_cons (nl, msgs_nl);
msgs_nl = scm_cons (SCM_CAR (msgs), msgs_nl);
msgs = SCM_CDR (msgs);
}
msgs_nl = scm_string_append (scm_reverse_x (msgs_nl, SCM_EOL));
c_msgs = scm_to_locale_string (msgs_nl);
scm_c_issue_deprecation_warning (c_msgs);
free (c_msgs);
}
return SCM_UNSPECIFIED;
}
#undef FUNC_NAME
static void
print_deprecation_summary (void)
{
if (print_summary)
{
fputs ("\n"
"Some deprecated features have been used. Set the environment\n"
"variable GUILE_WARN_DEPRECATED to \"detailed\" and rerun the\n"
"program to get more information. Set it to \"no\" to suppress\n"
"this message.\n", stderr);
}
}
SCM_DEFINE(scm_include_deprecated_features,
"include-deprecated-features", 0, 0, 0,
(),
"Return @code{#t} iff deprecated features should be included "
"in public interfaces.")
#define FUNC_NAME s_scm_include_deprecated_features
{
return scm_from_bool (SCM_ENABLE_DEPRECATED == 1);
}
#undef FUNC_NAME
void
scm_init_deprecation ()
{
const char *level = getenv ("GUILE_WARN_DEPRECATED");
if (level == NULL)
level = SCM_WARN_DEPRECATED_DEFAULT;
if (!strcmp (level, "detailed"))
SCM_WARN_DEPRECATED = 1;
else if (!strcmp (level, "no"))
SCM_WARN_DEPRECATED = 0;
else
{
SCM_WARN_DEPRECATED = 0;
atexit (print_deprecation_summary);
}
#include "deprecation.x"
}
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