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256 lines
7.0 KiB
256 lines
7.0 KiB
% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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%
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% Read syslinux configuration to get human-readable names for menu items, and
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% to decide whether to hide menu items. The configuration used is the same as
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% that used by the syslinux simple menu system, so you can use the same
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% configuration file for both.
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%
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% - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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/menuconfig.find {
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[
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"/syslinux.cfg"
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"/isolinux.cfg"
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"/isolinux/isolinux.cfg"
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"/boot/isolinux/isolinux.cfg"
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] {
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dup filesize .undef ne { findfile return } if
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pop
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} forall
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.undef
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} def
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% Duplicate len bytes of string.
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% ( string len -- string )
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/strndup {
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/strndup.len exch def
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/strndup.src exch cvp def
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/strndup.dst strndup.len string cvp def
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strndup.dst strndup.src strndup.len memcpy
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strndup.dst strndup.len 0 put
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strndup.dst cvs
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} def
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% Force to lower case. Overwrites string.
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% ( string -- string )
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/tolower {
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dup length 0 eq { return } if
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dup length 1 sub 0 1 rot {
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over over get 32 or 2 index 3 1 roll put
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} for
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} def
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% Skip whitespace. Advances string.
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% ( string -- string )
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/menuconfig.skipspace {
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{
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dup 0 get
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dup 0 eq exch ' ' gt or { exit } if
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1 add
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} loop
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} def
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% Find the next word boundary (NUL or whitespace).
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% ( string -- pos )
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/menuconfig.nextspace {
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0 {
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over over get
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dup 0 eq exch ' ' le or { exit } if
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1 add
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} loop
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exch pop
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} def
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% Extract a keyword (always forced to lowercase). keyword_str must be freed.
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% ( config_str -- trailing_str keyword_str )
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/menuconfig.keyword {
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dup menuconfig.nextspace
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over over add % get trailing string
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3 1 roll strndup tolower % get lowercase keyword string
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} def
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% Extract a word. word_str must be freed.
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% ( config_str -- trailing_str word_str )
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/menuconfig.word {
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dup menuconfig.nextspace
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over over add % get trailing string
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3 1 roll strndup % get word string
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} def
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% Interpret a string as a number and return it, or .undef on failure.
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% Only supports hexadecimal numbers (optionally preceded by "0x").
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% ( string -- number )
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/menuconfig.strtol {
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tolower
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dup 0 get '0' eq over 1 get 'x' eq and { 2 add } if
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/menuconfig.strtol.tmp 0 def
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{
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dup '0' ge over '9' le and {
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'0' sub menuconfig.strtol.tmp 16 mul add
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/menuconfig.strtol.tmp exch def
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} {
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dup 'a' ge over 'f' le and {
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'a' sub 10 add menuconfig.strtol.tmp 16 mul add
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/menuconfig.strtol.tmp exch def
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} {
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pop .undef return
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} ifelse
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} ifelse
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} forall
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menuconfig.strtol.tmp
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} def
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% Set the human-readable text for the current menu item.
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% ( string -- )
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/menuconfig.sethuman {
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menuconfig.curlabel .undef eq { pop return } if
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/menuconfig.human exch def
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/menuconfig.idx 0 def
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menuconfig.entries {
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menuconfig.curlabel eq {
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menuconfig.humans menuconfig.idx menuconfig.human put
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return
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} if
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/menuconfig.idx inc
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} forall
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} def
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% Remove the current menu item from the menu.
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% ( -- )
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/menuconfig.hidelabel {
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menuconfig.curlabel .undef eq { return } if
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/menuconfig.idx 0 def
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menuconfig.entries {
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menuconfig.curlabel eq {
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% Copy everything up to here into new arrays.
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/menuconfig.newargs menuconfig.args length 1 sub array def
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/menuconfig.newentries menuconfig.entries length 1 sub array def
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/menuconfig.newhumans menuconfig.humans length 1 sub array def
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menuconfig.idx 0 ne {
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0 1 menuconfig.idx 1 sub {
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menuconfig.args over get
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menuconfig.newargs 2 index rot put
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menuconfig.entries over get
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menuconfig.newentries 2 index rot put
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menuconfig.humans over get
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menuconfig.newhumans 3 1 roll put
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} for
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} if
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% Slide everything else down one place.
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menuconfig.idx 1 menuconfig.entries length 2 sub {
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menuconfig.args over 1 add get
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menuconfig.newargs 2 index rot put
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menuconfig.entries over 1 add get
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menuconfig.newentries 2 index rot put
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menuconfig.humans over 1 add get
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menuconfig.newhumans 3 1 roll put
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} for
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/menuconfig.args menuconfig.newargs def
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/menuconfig.entries menuconfig.newentries def
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/menuconfig.humans menuconfig.newhumans def
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return
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} if
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/menuconfig.idx inc
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} forall
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} def
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% ( menu_entries_array menu_args_array -- menu_humans_array menu_entries_array menu_args_array )
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% The returned menu_args_array (kernel parameters), menu_entries_array
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% (identifiers), and menu_humans_array (human-readable names) will have any
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% hidden entries removed.
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/menuconfig.init {
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dup length array /menuconfig.args exch def
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over length array /menuconfig.entries exch def
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over length array /menuconfig.humans exch def
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% copy input arrays; initialise menuconfig.humans
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/menuconfig.idx 0 def
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{
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menuconfig.args menuconfig.idx rot put
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/menuconfig.idx inc
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} forall
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/menuconfig.idx 0 def
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{
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dup menuconfig.entries menuconfig.idx rot put
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menuconfig.humans menuconfig.idx rot put
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/menuconfig.idx inc
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} forall
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% we only understand syslinux configuration
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syslinux not {
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menuconfig.humans menuconfig.entries menuconfig.args return
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} if
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% load configuration file; return if not found
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menuconfig.find dup .undef eq {
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menuconfig.humans menuconfig.entries menuconfig.args return
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} if
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/menuconfig.file exch cvs def
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/menuconfig.curlabel .undef def
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menuconfig.file {
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% skip over any NULs we've left behind; exit if there's really no more
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% memory left to go
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{
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dup cvp length 0 eq { exit } if
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dup 0 get 0 ne { exit } if
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1 add
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} loop
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dup cvp length 0 eq { exit } if
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% break lines at \r or \n
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dup "\x0d" strstr dup 0 ne { 1 sub over exch 0 put } { pop } ifelse
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dup "\n" strstr dup 0 ne { 1 sub over exch 0 put } { pop } ifelse
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menuconfig.skipspace menuconfig.keyword
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dup "gfxboot-foreground" eq {
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over menuconfig.skipspace menuconfig.strtol dup .undef ne {
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/menu.text.select over def
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/boot.text.options over def
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/boot.text.normal over def
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/panel.high exch def
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} { pop } ifelse
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} if
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dup "gfxboot-background" eq {
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over menuconfig.skipspace menuconfig.strtol dup .undef ne {
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/menu.text.normal over def
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/panel.normal exch def
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} { pop } ifelse
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} if
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dup "gfxboot-access-options" eq {
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/access.optionnames [
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.undef
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4 index
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{
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menuconfig.skipspace dup 0 get 0 eq { exit } if
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menuconfig.word exch
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} loop
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pop
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] def
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} if
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dup "label" eq {
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over menuconfig.skipspace strdup /menuconfig.curlabel exch def
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} if
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dup "menu" eq {
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over menuconfig.skipspace menuconfig.keyword
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dup "label" eq { over menuconfig.skipspace strdup menuconfig.sethuman } if
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dup "hide" eq { menuconfig.hidelabel } if
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free rot pop exch
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} if
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free
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% skip to end of line
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dup length add
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} loop pop
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menuconfig.file free
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menuconfig.humans menuconfig.entries menuconfig.args
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} def
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