diff options
Diffstat (limited to 'scripts/options.awk')
| -rwxr-xr-x | scripts/options.awk | 205 |
1 files changed, 122 insertions, 83 deletions
diff --git a/scripts/options.awk b/scripts/options.awk index 3fc3ad18b..c3a850173 100755 --- a/scripts/options.awk +++ b/scripts/options.awk @@ -64,11 +64,15 @@ BEGIN{ logunsupported=0 # write unsupported options too # Precreate arrays + # for each option: option[""] = "" # list of all options: default enabled/disabled done[""] = 1 # marks option as having been output requires[""] = "" # requires by option iffs[""] = "" # if by option enabledby[""] = "" # options that enable it by option + sets[""] = "" # settings set by each option + setval[""] = "" # value to set (indexed: 'option sets[option]') + # for each setting: setting[""] = "" # requires by setting defaults[""] = "" # used for a defaulted value doneset[""] = 1 # marks setting as having been output @@ -200,7 +204,7 @@ $1 == "com"{ if (NF > 1) { # sub(/^[ ]*com[ ]*/, "") $1 = "" - print comment, $0, cend >out + print comment $0, cend >out } else print start end >out next @@ -237,7 +241,9 @@ $1 == "file" && NF >= 2{ next } -# option NAME ( (requires|enables|if) NAME* | on | off | disabled )* +# option NAME ( (requires|enables|if) NAME* | on | off | disabled | +# sets SETTING VALUE+ )* +# # Declares an option 'NAME' and describes its default setting (disabled) # and its relationship to other options. The option is disabled # unless *all* the options listed after 'requires' are set and at @@ -298,7 +304,7 @@ $1 == "option" && NF >= 2{ break } } - } else if (val == "requires" || val == "if" || val == "enables") { + } else if (val == "requires" || val == "if" || val == "enables" || val =="sets") { key = val } else if (key == "requires") { requires[opt] = requires[opt] " " val @@ -306,6 +312,12 @@ $1 == "option" && NF >= 2{ iffs[opt] = iffs[opt] " " val } else if (key == "enables") { enabledby[val] = enabledby[val] " " opt + } else if (key == "sets") { + sets[opt] = sets[opt] " " val + key = "setval" + set = val + } else if (key == "setval") { + setval[opt " " set] = setval[opt " " set] " " val } else break # bad line format } @@ -522,83 +534,7 @@ END{ exit 0 } - # Do the 'setting' values first, the algorithm the standard - # tree walk (O(1)) done in an O(2) while/for loop; interations - # settings x depth, outputing the deepest required macros - # first. - print "" >out - print "/* SETTINGS */" >out - print comment, "settings", cend >out - # Sort (in dfn.awk) on field 2, the setting name - print "PNG_DFN_START_SORT 2" >out - finished = 0 - while (!finished) { - finished = 1 - movement = 0 # done nothing - for (i in setting) if (!doneset[i]) { - nreqs = split(setting[i], r) - if (nreqs > 0) { - for (j=1; j<=nreqs; ++j) if (!doneset[r[j]]) { - break - } - if (j<=nreqs) { - finished = 0 - continue # try a different setting - } - } - - # All the requirements have been processed, output - # this setting. - if (deb) print "setting", i - deflt = defaults[i] - # A leading @ means leave it unquoted so the preprocessor - # can substitute the build time value - if (deflt ~ /^ @/) - deflt = " " subs substr(deflt, 3) sube - # Remove any spurious trailing spaces - sub(/ *$/,"",deflt) - print "" >out - print "/* setting: ", i >out - print " * requires:" setting[i] >out - print " * default: ", defaults[i] defltinfo, "*/" >out - if (defaults[i] == "") { # no default, only check if defined - print "#ifdef PNG_" i >out - } - for (j=1; j<=nreqs; ++j) { - print "# ifndef PNG_" r[j] >out - print error, i, "requires", r[j] end >out - print "# endif" >out - } - if (defaults[i] != "") { # default handling - print "#ifdef PNG_" i >out - } - # PNG_<i> is defined, so substitute the value: - print def i, subs "PNG_" i sube end >out - if (defaults[i] != "") { - print "#else /*default*/" >out - # And add the default definition for the benefit - # of later settings an options test: - print "# define PNG_" i deflt >out - print def i deflt end >out - } - print "#endif" >out - - doneset[i] = 1 - ++movement - } - - if (!finished && !movement) { - print "setting: loop or missing setting in 'requires', cannot process:" - for (i in setting) if (!doneset[i]) { - print " setting", i, "requires" setting[i] - } - exit 1 - } - } - print "PNG_DFN_END_SORT" >out - print comment, "end of settings", cend >out - - # Now do the options - somewhat more complex. The dependency + # Do the options first (allowing options to set settings). The dependency # tree is thus: # # name > name @@ -690,7 +626,7 @@ END{ } if (err) exit 1 - # Sort options too + # Sort options: print "PNG_DFN_START_SORT 2" >out # option[i] is now the complete list of all the tokens we may @@ -730,8 +666,9 @@ END{ print "" >out print "/* option:", i, option[i] >out print " * requires: " requires[i] >out - print " * if: " iffs[i] >out - print " * enabled-by:" enabledby[i], "*/" >out + print " * if: " iffs[i] >out + print " * enabled-by:" enabledby[i] >out + print " * sets: " sets[i], "*/" >out print "#undef PNG_on" >out print "#define PNG_on 1" >out @@ -814,6 +751,21 @@ END{ print error, i, "is on: enabled by:" iffs[i] enabledby[i] ", requires" requires[i] end >out } else if (i !~ /^ok_/) { print def i sup >out + # Supported option, set required settings + nreqs = split(sets[i], r) + for (j=1; j<=nreqs; ++j) { + print "# ifdef PNG_set_" r[j] >out + # Some other option has already set a value: + print error, i, "sets", r[j] ": duplicate setting" end >out + print error, " previous value: " end "PNG_set_" r[j] >out + print "# else" >out + # Else set the default: note that this won't accept arbitrary + # values, the setval string must be acceptable to all the C + # compilers we use. That means it must be VERY simple; a number, + # a name or a string. + print "# define PNG_set_" r[j], setval[i " " r[j]] >out + print "# endif" >out + } } print "# endif /* definition */" >out print "#endif /*requires, if*/" >out @@ -847,6 +799,93 @@ END{ print "PNG_DFN_END_SORT" >out print comment, "end of options", cend >out + # Do the 'setting' values second, the algorithm the standard + # tree walk (O(1)) done in an O(2) while/for loop; interations + # settings x depth, outputing the deepest required macros + # first. + print "" >out + print "/* SETTINGS */" >out + print comment, "settings", cend >out + # Sort (in dfn.awk) on field 2, the setting name + print "PNG_DFN_START_SORT 2" >out + finished = 0 + while (!finished) { + finished = 1 + movement = 0 # done nothing + for (i in setting) if (!doneset[i]) { + nreqs = split(setting[i], r) + if (nreqs > 0) { + # By default assume the requires values are options, but if there + # is no option with that name check for a setting + for (j=1; j<=nreqs; ++j) if (option[r[j]] == "" && !doneset[r[j]]) { + break + } + if (j<=nreqs) { + finished = 0 + continue # try a different setting + } + } + + # All the requirements have been processed, output + # this setting. + if (deb) print "setting", i + deflt = defaults[i] + # Remove any spurious trailing spaces + sub(/ *$/,"",deflt) + # A leading @ means leave it unquoted so the preprocessor + # can substitute the build time value + if (deflt ~ /^ @/) + deflt = " " subs substr(deflt, 3) sube + print "" >out + print "/* setting: ", i >out + print " * requires:" setting[i] >out + print " * default: ", defaults[i] deflt, "*/" >out + for (j=1; j<=nreqs; ++j) { + if (option[r[j]] != "") + print "#ifndef PNG_" r[j] "_SUPPORTED" >out + else + print "#ifndef PNG_" r[j] >out + print error, i, "requires", r[j] end >out + print "# endif" >out + } + # The precedence is: + # + # 1) External definition; trumps: + # 2) Option 'sets' value; trumps: + # 3) Setting 'default' + # + print "#ifdef PNG_" i >out + # PNG_<i> is defined, so substitute the value: + print def i, subs "PNG_" i sube end >out + print "#else /* use default */" >out + print "# ifdef PNG_set_" i >out + # Value from an option 'sets' argument + print def i, subs "PNG_set_" i sube end >out + # This is so that subsequent tests on the setting work: + print "# define PNG_" i, "1" >out + if (defaults[i] != "") { + print "# else /*default*/" >out + print def i deflt end >out + print "# define PNG_" i, "1" >out + } + print "# endif /* defaults */" >out + print "#endif /* setting", i, "*/" >out + + doneset[i] = 1 + ++movement + } + + if (!finished && !movement) { + print "setting: loop or missing setting in 'requires', cannot process:" + for (i in setting) if (!doneset[i]) { + print " setting", i, "requires" setting[i] + } + exit 1 + } + } + print "PNG_DFN_END_SORT" >out + print comment, "end of settings", cend >out + # Regular end - everything looks ok if (protect != "") { print start "#endif", "/*", protect, "*/" end >out |