dave/openttd
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Codechange: Don't use cpp_offsetof in the save/load code.

Browse Source 
Many of the member variables that are used in save/load are inside types
that are not standard layout types. Using pointer arithmetics to determine
addresses of members inside types that are not standard layout is generally
undefined behaviour. If we'd use C++17, it is conditionally supported, which means
each compiler may or may not support it. And even then using it for individual
array elements is syntactically not supported the the standard offsetof function.

Unfortunately, the trickery employed for saving linkgraph settings causes quite some
clutter in the settings ini files.
This commit is contained in:
Michael Lutz
2020-12-14 00:14:37 +01:00
parent 9c9292949f
commit 7845434270
10 changed files with 155 additions and 135 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
src/table/misc_settings.ini
View File

@@ -13,13 +13,13 @@ static const SettingDescGlobVarList _misc_settings[] = {
[post-amble]
};
[templates]
SDTG_LIST = SDTG_LIST($name, $type, $length, $flags, $guiflags, $var, $def, $str, $strhelp, $strval, $proc, $from, $to, $cat),
SDTG_MMANY = SDTG_MMANY($name, $type, $flags, $guiflags, $var, $def, $full, $str, $strhelp, $strval, $proc, $from, $to, $cat),
SDTG_OMANY = SDTG_OMANY($name, $type, $flags, $guiflags, $var, $def, $max, $full, $str, $strhelp, $strval, $proc, $from, $to, $cat),
SDTG_STR = SDTG_STR($name, $type, $flags, $guiflags, $var, $def, $str, $strhelp, $strval, $proc, $from, $to, $cat),
SDTG_SSTR = SDTG_SSTR($name, $type, $flags, $guiflags, $var, $def, $str, $strhelp, $strval, $proc, $from, $to, $cat),
SDTG_BOOL = SDTG_BOOL($name, $flags, $guiflags, $var, $def, $str, $strhelp, $strval, $proc, $from, $to, $cat),
SDTG_VAR = SDTG_VAR($name, $type, $flags, $guiflags, $var, $def, $min, $max, $interval, $str, $strhelp, $strval, $proc, $from, $to, $cat),
SDTG_LIST = SDTG_LIST($name, $type, $length, $flags, $guiflags, $var, $def, $str, $strhelp, $strval, $proc, $from, $to, $cat, $extra),
SDTG_MMANY = SDTG_MMANY($name, $type, $flags, $guiflags, $var, $def, $full, $str, $strhelp, $strval, $proc, $from, $to, $cat, $extra),
SDTG_OMANY = SDTG_OMANY($name, $type, $flags, $guiflags, $var, $def, $max, $full, $str, $strhelp, $strval, $proc, $from, $to, $cat, $extra),
SDTG_STR = SDTG_STR($name, $type, $flags, $guiflags, $var, $def, $str, $strhelp, $strval, $proc, $from, $to, $cat, $extra),
SDTG_SSTR = SDTG_SSTR($name, $type, $flags, $guiflags, $var, $def, $str, $strhelp, $strval, $proc, $from, $to, $cat, $extra),
SDTG_BOOL = SDTG_BOOL($name, $flags, $guiflags, $var, $def, $str, $strhelp, $strval, $proc, $from, $to, $cat, $extra),
SDTG_VAR = SDTG_VAR($name, $type, $flags, $guiflags, $var, $def, $min, $max, $interval, $str, $strhelp, $strval, $proc, $from, $to, $cat, $extra),
SDTG_END = SDTG_END()
[defaults]
@@ -34,6 +34,7 @@ load = nullptr
from = SL_MIN_VERSION
to = SL_MAX_VERSION
cat = SC_ADVANCED
extra = 0