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xserver/hw/xfree86/parser/InputClass.c
Enrico Weigelt, metux IT consult d8e6511b1b xfree86: use calloc() instead of malloc() 
Using calloc() instead of malloc() as preventive measure, so there
never can be any hidden bugs or leaks due uninitialized memory.

The extra cost of using this compiler intrinsic should be practically
impossible to measure - in many cases a good compiler can even deduce
if certain areas really don't need to be zero'd (because they're written
to right after allocation) and create more efficient machine code.

The code pathes in question are pretty cold anyways, so it's probably
not worth even thinking about potential extra runtime costs.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
2025-06-12 16:49:57 +02:00

500 lines
18 KiB
C
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/*
* Copyright (c) 2009 Dan Nicholson
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <string.h>
#include "os.h"
#include "xf86Parser.h"
#include "xf86tokens.h"
#include "Configint.h"
static const xf86ConfigSymTabRec InputClassTab[] = {
{ENDSECTION, "endsection"},
{IDENTIFIER, "identifier"},
{OPTION, "option"},
{DRIVER, "driver"},
{MATCH_PRODUCT, "matchproduct"},
{MATCH_VENDOR, "matchvendor"},
{MATCH_DEVICE_PATH, "matchdevicepath"},
{MATCH_OS, "matchos"},
{MATCH_PNPID, "matchpnpid"},
{MATCH_USBID, "matchusbid"},
{MATCH_DRIVER, "matchdriver"},
{MATCH_TAG, "matchtag"},
{MATCH_LAYOUT, "matchlayout"},
{MATCH_IS_KEYBOARD, "matchiskeyboard"},
{MATCH_IS_POINTER, "matchispointer"},
{MATCH_IS_JOYSTICK, "matchisjoystick"},
{MATCH_IS_TABLET, "matchistablet"},
{MATCH_IS_TABLET_PAD, "matchistabletpad"},
{MATCH_IS_TOUCHPAD, "matchistouchpad"},
{MATCH_IS_TOUCHSCREEN, "matchistouchscreen"},
{NOMATCH_PRODUCT, "nomatchproduct"},
{NOMATCH_VENDOR, "nomatchvendor"},
{NOMATCH_DEVICE_PATH, "nomatchdevicepath"},
{NOMATCH_OS, "nomatchos"},
{NOMATCH_PNPID, "nomatchpnpid"},
{NOMATCH_USBID, "nomatchusbid"},
{NOMATCH_DRIVER, "nomatchdriver"},
{NOMATCH_TAG, "nomatchtag"},
{NOMATCH_LAYOUT, "nomatchlayout"},
{-1, ""},
};
static void
xf86freeInputClassList(XF86ConfInputClassPtr ptr)
{
XF86ConfInputClassPtr prev;
while (ptr) {
xf86MatchGroup *group, *next;
char **list;
TestFree(ptr->identifier);
TestFree(ptr->driver);
xorg_list_for_each_entry_safe(group, next, &ptr->match_product, entry) {
xorg_list_del(&group->entry);
for (list = group->values; *list; list++)
free(*list);
free(group);
}
xorg_list_for_each_entry_safe(group, next, &ptr->match_vendor, entry) {
xorg_list_del(&group->entry);
for (list = group->values; *list; list++)
free(*list);
free(group);
}
xorg_list_for_each_entry_safe(group, next, &ptr->match_device, entry) {
xorg_list_del(&group->entry);
for (list = group->values; *list; list++)
free(*list);
free(group);
}
xorg_list_for_each_entry_safe(group, next, &ptr->match_os, entry) {
xorg_list_del(&group->entry);
for (list = group->values; *list; list++)
free(*list);
free(group);
}
xorg_list_for_each_entry_safe(group, next, &ptr->match_pnpid, entry) {
xorg_list_del(&group->entry);
for (list = group->values; *list; list++)
free(*list);
free(group);
}
xorg_list_for_each_entry_safe(group, next, &ptr->match_usbid, entry) {
xorg_list_del(&group->entry);
for (list = group->values; *list; list++)
free(*list);
free(group);
}
xorg_list_for_each_entry_safe(group, next, &ptr->match_driver, entry) {
xorg_list_del(&group->entry);
for (list = group->values; *list; list++)
free(*list);
free(group);
}
xorg_list_for_each_entry_safe(group, next, &ptr->match_tag, entry) {
xorg_list_del(&group->entry);
for (list = group->values; *list; list++)
free(*list);
free(group);
}
xorg_list_for_each_entry_safe(group, next, &ptr->match_layout, entry) {
xorg_list_del(&group->entry);
for (list = group->values; *list; list++)
free(*list);
free(group);
}
TestFree(ptr->comment);
xf86optionListFree(ptr->option_lst);
prev = ptr;
ptr = ptr->list.next;
free(prev);
}
}
#define CLEANUP xf86freeInputClassList
#define TOKEN_SEP "|"
enum MatchType {
MATCH_NORMAL,
MATCH_NEGATED,
};
static void
add_group_entry(struct xorg_list *head, char **values, enum MatchType type)
{
xf86MatchGroup *group = calloc(1, sizeof(xf86MatchGroup));
if (group) {
group->is_negated = (type == MATCH_NEGATED);
group->values = values;
xorg_list_add(&group->entry, head);
}
}
XF86ConfInputClassPtr
xf86parseInputClassSection(void)
{
int has_ident = FALSE;
int token;
enum MatchType matchtype;
parsePrologue(XF86ConfInputClassPtr, XF86ConfInputClassRec)
/* Initialize MatchGroup lists */
xorg_list_init(&ptr->match_product);
xorg_list_init(&ptr->match_vendor);
xorg_list_init(&ptr->match_device);
xorg_list_init(&ptr->match_os);
xorg_list_init(&ptr->match_pnpid);
xorg_list_init(&ptr->match_usbid);
xorg_list_init(&ptr->match_driver);
xorg_list_init(&ptr->match_tag);
xorg_list_init(&ptr->match_layout);
while ((token = xf86getToken(InputClassTab)) != ENDSECTION) {
matchtype = MATCH_NORMAL;
switch (token) {
case COMMENT:
ptr->comment = xf86addComment(ptr->comment, xf86_lex_val.str);
free(xf86_lex_val.str);
xf86_lex_val.str = NULL;
break;
case IDENTIFIER:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "Identifier");
if (has_ident == TRUE)
Error(MULTIPLE_MSG, "Identifier");
ptr->identifier = xf86_lex_val.str;
has_ident = TRUE;
break;
case DRIVER:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "Driver");
if (strcmp(xf86_lex_val.str, "keyboard") == 0) {
ptr->driver = strdup("kbd");
free(xf86_lex_val.str);
}
else
ptr->driver = xf86_lex_val.str;
break;
case OPTION:
ptr->option_lst = xf86parseOption(ptr->option_lst);
break;
case NOMATCH_PRODUCT:
matchtype = MATCH_NEGATED;
/* fallthrough */
case MATCH_PRODUCT:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchProduct");
add_group_entry(&ptr->match_product,
xstrtokenize(xf86_lex_val.str, TOKEN_SEP),
matchtype);
free(xf86_lex_val.str);
break;
case NOMATCH_VENDOR:
matchtype = MATCH_NEGATED;
/* fallthrough */
case MATCH_VENDOR:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchVendor");
add_group_entry(&ptr->match_vendor,
xstrtokenize(xf86_lex_val.str, TOKEN_SEP),
matchtype);
free(xf86_lex_val.str);
break;
case NOMATCH_DEVICE_PATH:
matchtype = MATCH_NEGATED;
/* fallthrough */
case MATCH_DEVICE_PATH:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchDevicePath");
add_group_entry(&ptr->match_device,
xstrtokenize(xf86_lex_val.str, TOKEN_SEP),
matchtype);
free(xf86_lex_val.str);
break;
case NOMATCH_OS:
matchtype = MATCH_NEGATED;
/* fallthrough */
case MATCH_OS:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchOS");
add_group_entry(&ptr->match_os, xstrtokenize(xf86_lex_val.str,
TOKEN_SEP),
matchtype);
free(xf86_lex_val.str);
break;
case NOMATCH_PNPID:
matchtype = MATCH_NEGATED;
/* fallthrough */
case MATCH_PNPID:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchPnPID");
add_group_entry(&ptr->match_pnpid,
xstrtokenize(xf86_lex_val.str, TOKEN_SEP),
matchtype);
free(xf86_lex_val.str);
break;
case NOMATCH_USBID:
matchtype = MATCH_NEGATED;
/* fallthrough */
case MATCH_USBID:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchUSBID");
add_group_entry(&ptr->match_usbid,
xstrtokenize(xf86_lex_val.str, TOKEN_SEP),
matchtype);
free(xf86_lex_val.str);
break;
case NOMATCH_DRIVER:
matchtype = MATCH_NEGATED;
/* fallthrough */
case MATCH_DRIVER:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchDriver");
add_group_entry(&ptr->match_driver,
xstrtokenize(xf86_lex_val.str, TOKEN_SEP),
matchtype);
free(xf86_lex_val.str);
break;
case NOMATCH_TAG:
matchtype = MATCH_NEGATED;
/* fallthrough */
case MATCH_TAG:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchTag");
add_group_entry(&ptr->match_tag, xstrtokenize(xf86_lex_val.str,
TOKEN_SEP),
matchtype);
free(xf86_lex_val.str);
break;
case NOMATCH_LAYOUT:
matchtype = MATCH_NEGATED;
/* fallthrough */
case MATCH_LAYOUT:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchLayout");
add_group_entry(&ptr->match_layout,
xstrtokenize(xf86_lex_val.str, TOKEN_SEP),
matchtype);
free(xf86_lex_val.str);
break;
case MATCH_IS_KEYBOARD:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchIsKeyboard");
ptr->is_keyboard.set = xf86getBoolValue(&ptr->is_keyboard.val,
xf86_lex_val.str);
free(xf86_lex_val.str);
if (!ptr->is_keyboard.set)
Error(BOOL_MSG, "MatchIsKeyboard");
break;
case MATCH_IS_POINTER:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchIsPointer");
ptr->is_pointer.set = xf86getBoolValue(&ptr->is_pointer.val,
xf86_lex_val.str);
free(xf86_lex_val.str);
if (!ptr->is_pointer.set)
Error(BOOL_MSG, "MatchIsPointer");
break;
case MATCH_IS_JOYSTICK:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchIsJoystick");
ptr->is_joystick.set = xf86getBoolValue(&ptr->is_joystick.val,
xf86_lex_val.str);
free(xf86_lex_val.str);
if (!ptr->is_joystick.set)
Error(BOOL_MSG, "MatchIsJoystick");
break;
case MATCH_IS_TABLET:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchIsTablet");
ptr->is_tablet.set = xf86getBoolValue(&ptr->is_tablet.val, xf86_lex_val.str);
free(xf86_lex_val.str);
if (!ptr->is_tablet.set)
Error(BOOL_MSG, "MatchIsTablet");
break;
case MATCH_IS_TABLET_PAD:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchIsTabletPad");
ptr->is_tablet_pad.set = xf86getBoolValue(&ptr->is_tablet_pad.val, xf86_lex_val.str);
free(xf86_lex_val.str);
if (!ptr->is_tablet_pad.set)
Error(BOOL_MSG, "MatchIsTabletPad");
break;
case MATCH_IS_TOUCHPAD:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchIsTouchpad");
ptr->is_touchpad.set = xf86getBoolValue(&ptr->is_touchpad.val,
xf86_lex_val.str);
free(xf86_lex_val.str);
if (!ptr->is_touchpad.set)
Error(BOOL_MSG, "MatchIsTouchpad");
break;
case MATCH_IS_TOUCHSCREEN:
if (xf86getSubToken(&(ptr->comment)) != STRING)
Error(QUOTE_MSG, "MatchIsTouchscreen");
ptr->is_touchscreen.set = xf86getBoolValue(&ptr->is_touchscreen.val,
xf86_lex_val.str);
free(xf86_lex_val.str);
if (!ptr->is_touchscreen.set)
Error(BOOL_MSG, "MatchIsTouchscreen");
break;
case EOF_TOKEN:
Error(UNEXPECTED_EOF_MSG);
break;
default:
Error(INVALID_KEYWORD_MSG, xf86tokenString());
break;
}
}
if (!has_ident)
Error(NO_IDENT_MSG);
#ifdef DEBUG
printf("InputClass section parsed\n");
#endif
return ptr;
}
void
xf86printInputClassSection(FILE * cf, XF86ConfInputClassPtr ptr)
{
const xf86MatchGroup *group;
char *const *cur;
while (ptr) {
fprintf(cf, "Section \"InputClass\"\n");
if (ptr->comment)
fprintf(cf, "%s", ptr->comment);
if (ptr->identifier)
fprintf(cf, "\tIdentifier \"%s\"\n", ptr->identifier);
if (ptr->driver)
fprintf(cf, "\tDriver \"%s\"\n", ptr->driver);
xorg_list_for_each_entry(group, &ptr->match_product, entry) {
fprintf(cf, "\tMatchProduct \"");
for (cur = group->values; *cur; cur++)
fprintf(cf, "%s%s", cur == group->values ? "" : TOKEN_SEP,
*cur);
fprintf(cf, "\"\n");
}
xorg_list_for_each_entry(group, &ptr->match_vendor, entry) {
fprintf(cf, "\tMatchVendor \"");
for (cur = group->values; *cur; cur++)
fprintf(cf, "%s%s", cur == group->values ? "" : TOKEN_SEP,
*cur);
fprintf(cf, "\"\n");
}
xorg_list_for_each_entry(group, &ptr->match_device, entry) {
fprintf(cf, "\tMatchDevicePath \"");
for (cur = group->values; *cur; cur++)
fprintf(cf, "%s%s", cur == group->values ? "" : TOKEN_SEP,
*cur);
fprintf(cf, "\"\n");
}
xorg_list_for_each_entry(group, &ptr->match_os, entry) {
fprintf(cf, "\tMatchOS \"");
for (cur = group->values; *cur; cur++)
fprintf(cf, "%s%s", cur == group->values ? "" : TOKEN_SEP,
*cur);
fprintf(cf, "\"\n");
}
xorg_list_for_each_entry(group, &ptr->match_pnpid, entry) {
fprintf(cf, "\tMatchPnPID \"");
for (cur = group->values; *cur; cur++)
fprintf(cf, "%s%s", cur == group->values ? "" : TOKEN_SEP,
*cur);
fprintf(cf, "\"\n");
}
xorg_list_for_each_entry(group, &ptr->match_usbid, entry) {
fprintf(cf, "\tMatchUSBID \"");
for (cur = group->values; *cur; cur++)
fprintf(cf, "%s%s", cur == group->values ? "" : TOKEN_SEP,
*cur);
fprintf(cf, "\"\n");
}
xorg_list_for_each_entry(group, &ptr->match_driver, entry) {
fprintf(cf, "\tMatchDriver \"");
for (cur = group->values; *cur; cur++)
fprintf(cf, "%s%s", cur == group->values ? "" : TOKEN_SEP,
*cur);
fprintf(cf, "\"\n");
}
xorg_list_for_each_entry(group, &ptr->match_tag, entry) {
fprintf(cf, "\tMatchTag \"");
for (cur = group->values; *cur; cur++)
fprintf(cf, "%s%s", cur == group->values ? "" : TOKEN_SEP,
*cur);
fprintf(cf, "\"\n");
}
xorg_list_for_each_entry(group, &ptr->match_layout, entry) {
fprintf(cf, "\tMatchLayout \"");
for (cur = group->values; *cur; cur++)
fprintf(cf, "%s%s", cur == group->values ? "" : TOKEN_SEP,
*cur);
fprintf(cf, "\"\n");
}
if (ptr->is_keyboard.set)
fprintf(cf, "\tIsKeyboard \"%s\"\n",
ptr->is_keyboard.val ? "yes" : "no");
if (ptr->is_pointer.set)
fprintf(cf, "\tIsPointer \"%s\"\n",
ptr->is_pointer.val ? "yes" : "no");
if (ptr->is_joystick.set)
fprintf(cf, "\tIsJoystick \"%s\"\n",
ptr->is_joystick.val ? "yes" : "no");
if (ptr->is_tablet.set)
fprintf(cf, "\tIsTablet \"%s\"\n",
ptr->is_tablet.val ? "yes" : "no");
if (ptr->is_tablet_pad.set)
fprintf(cf, "\tIsTabletPad \"%s\"\n",
ptr->is_tablet_pad.val ? "yes" : "no");
if (ptr->is_touchpad.set)
fprintf(cf, "\tIsTouchpad \"%s\"\n",
ptr->is_touchpad.val ? "yes" : "no");
if (ptr->is_touchscreen.set)
fprintf(cf, "\tIsTouchscreen \"%s\"\n",
ptr->is_touchscreen.val ? "yes" : "no");
xf86printOptionList(cf, ptr->option_lst, 1);
fprintf(cf, "EndSection\n\n");
ptr = ptr->list.next;
}
}
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