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/* Control warning output in GNU Make.
Copyright (C) 2023 Free Software Foundation, Inc.
This file is part of GNU Make.
GNU Make is free software; you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation; either version 3 of the License, or (at your option) any later
version.
GNU Make 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 General Public License for more details.
You should have received a copy of the GNU General Public License along with
this program. If not, see <https://www.gnu.org/licenses/>. */
#include "makeint.h"
#include "warning.h"
#include "variable.h"
/* Current action for each warning. */
enum warning_action warnings[wt_max];
/* The default behavior of warnings. */
static struct warning_data warn_default;
/* Warning settings from the .WARNING variable. */
static struct warning_data warn_variable;
/* Warning settings from the command line. */
static struct warning_data warn_flag;
static const char *w_action_map[w_error+1] = {NULL, "ignore", "warn", "error"};
static const char *w_name_map[wt_max] = {
"invalid-var",
"invalid-ref",
"undefined-var"
};
#define encode_warn_action(_b,_s) \
variable_buffer_output (_b, w_action_map[_s], strlen (w_action_map[_s]))
#define encode_warn_name(_b,_t) \
variable_buffer_output (_b, w_name_map[_t], strlen (w_name_map[_t]))
static void set_warnings ()
{
/* Called whenever any warnings could change; resets the current actions. */
for (enum warning_type wt = 0; wt < wt_max; ++wt)
warnings[wt] =
warn_flag.actions[wt] != w_unset ? warn_flag.actions[wt]
: warn_flag.global != w_unset ? warn_flag.global
: warn_variable.actions[wt] != w_unset ? warn_variable.actions[wt]
: warn_variable.global != w_unset ? warn_variable.global
: warn_default.actions[wt];
}
void
warn_init ()
{
memset (&warn_default, '\0', sizeof (warn_default));
memset (&warn_variable, '\0', sizeof (warn_variable));
memset (&warn_flag, '\0', sizeof (warn_flag));
/* All warnings must have a default. */
warn_default.global = w_warn;
warn_default.actions[wt_invalid_var] = w_warn;
warn_default.actions[wt_invalid_ref] = w_warn;
warn_default.actions[wt_undefined_var] = w_ignore;
set_warnings ();
}
static void
init_data (struct warning_data *data)
{
data->global = w_unset;
for (enum warning_type wt = wt_invalid_var; wt < wt_max; ++wt)
data->actions[wt] = w_unset;
}
static enum warning_action
decode_warn_action (const char *action, size_t length)
{
for (enum warning_action st = w_ignore; st <= w_error; ++st)
{
size_t len = strlen (w_action_map[st]);
if (length == len && strncasecmp (action, w_action_map[st], length) == 0)
return st;
}
return w_unset;
}
static enum warning_type
decode_warn_name (const char *name, size_t length)
{
for (enum warning_type wt = wt_invalid_var; wt < wt_max; ++wt)
{
size_t len = strlen (w_name_map[wt]);
if (length == len && strncasecmp (name, w_name_map[wt], length) == 0)
return wt;
}
return wt_max;
}
void
decode_warn_actions (const char *value, const floc *flocp)
{
struct warning_data *data = &warn_flag;
NEXT_TOKEN (value);
if (flocp)
{
data = &warn_variable;
/* When a variable is set to empty, reset everything. */
if (*value == '\0')
init_data (data);
}
while (*value != '\0')
{
enum warning_action action;
/* Find the end of the next warning definition. */
const char *ep = value;
while (! STOP_SET (*ep, MAP_BLANK|MAP_COMMA|MAP_NUL))
++ep;
/* If the value is just an action set it globally. */
action = decode_warn_action (value, ep - value);
if (action != w_unset)
data->global = action;
else
{
enum warning_type type;
const char *cp = memchr (value, ':', ep - value);
if (!cp)
cp = ep;
type = decode_warn_name (value, cp - value);
if (type == wt_max)
{
int l = (int)(cp - value);
if (!flocp)
ONS (fatal, NILF, _("unknown warning '%.*s'"), l, value);
ONS (error, flocp,
_("unknown warning '%.*s': ignored"), l, value);
}
/* If there's a warning action, decode it. */
if (cp == ep)
action = w_warn;
else
{
++cp;
action = decode_warn_action (cp, ep - cp);
if (action == w_unset)
{
int l = (int)(ep - cp);
if (!flocp)
ONS (fatal, NILF, _("unknown warning action '%.*s'"), l, cp);
ONS (error, flocp,
_("unknown warning action '%.*s': ignored"), l, cp);
}
}
data->actions[type] = action;
}
value = ep;
while (STOP_SET (*value, MAP_BLANK|MAP_COMMA))
++value;
}
set_warnings ();
}
char *
encode_warn_flag (char *fp)
{
enum warning_type wt;
char sp = '=';
/* See if any warning options are set. */
for (wt = 0; wt < wt_max; ++wt)
if (warn_flag.actions[wt] != w_unset)
break;
if (wt == wt_max && warn_flag.global == w_unset)
return fp;
/* Something is set so construct a --warn option. */
fp = variable_buffer_output (fp, STRING_SIZE_TUPLE (" --warn"));
/* If only a global action set to warn, we're done. */
if (wt == wt_max && warn_flag.global == w_warn)
return fp;
/* If a global action is set, add it. */
if (warn_flag.global > w_unset)
{
fp = variable_buffer_output (fp, &sp, 1);
sp = ',';
fp = encode_warn_action (fp, warn_flag.global);
}
/* Add any specific actions. */
if (wt != wt_max)
for (wt = 0; wt < wt_max; ++wt)
{
enum warning_action act = warn_flag.actions[wt];
if (act > w_unset)
{
fp = variable_buffer_output (fp, &sp, 1);
sp = ',';
fp = encode_warn_name (fp, wt);
if (act != w_warn)
fp = encode_warn_action (variable_buffer_output (fp, ":", 1), act);
}
}
return fp;
}
void
warn_get_vardata (struct warning_data *data)
{
memcpy (data, &warn_variable, sizeof (warn_variable));
}
void
warn_set_vardata (const struct warning_data *data)
{
memcpy (&warn_variable, data, sizeof (warn_variable));
set_warnings ();
}
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