Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 1 | #!/bin/awk -f |
| 2 | # scripts/options.awk - library build configuration control |
| 3 | # |
Glenn Randers-Pehrson | 6147fae | 2014-10-01 10:23:56 -0500 | [diff] [blame^] | 4 | # last changed in libpng version 1.5.7 - December 15, 2011 |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 5 | # |
Glenn Randers-Pehrson | 6147fae | 2014-10-01 10:23:56 -0500 | [diff] [blame^] | 6 | # Copyright (c) 1998-2011 Glenn Randers-Pehrson |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 7 | # |
| 8 | # This code is released under the libpng license. |
| 9 | # For conditions of distribution and use, see the disclaimer |
| 10 | # and license in png.h |
| 11 | |
| 12 | # The output of this script is written to the file given by |
| 13 | # the variable 'out'. The script is run twice, once with |
| 14 | # an intermediate output file, 'options.tmp' then again on |
Glenn Randers-Pehrson | cd74549 | 2010-04-28 07:52:16 -0500 | [diff] [blame] | 15 | # that file to produce the final output: |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 16 | # |
Glenn Randers-Pehrson | cd74549 | 2010-04-28 07:52:16 -0500 | [diff] [blame] | 17 | # awk -f scripts/options.awk out=options.tmp scripts/options.dfa 1>&2 |
| 18 | # awk -f scripts/options.awk out=options.dfn options.tmp 1>&2 |
| 19 | # |
| 20 | # Some options may be specified on the command line: |
| 21 | # |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 22 | # deb=1 Causes debugging to be output |
| 23 | # logunsupported=1 Causes all options to be recorded in the output |
| 24 | # everything=off Causes all options to be disabled by default |
| 25 | # everything=on Causes all options to be enabled by default |
Glenn Randers-Pehrson | cd74549 | 2010-04-28 07:52:16 -0500 | [diff] [blame] | 26 | # |
Glenn Randers-Pehrson | 5feb87c | 2010-06-21 12:28:05 -0500 | [diff] [blame] | 27 | # If awk fails on your platform, try nawk instead. |
| 28 | # |
Glenn Randers-Pehrson | cd74549 | 2010-04-28 07:52:16 -0500 | [diff] [blame] | 29 | # These options may also be specified in the original input file (and |
| 30 | # are copied to the preprocessed file). |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 31 | |
| 32 | BEGIN{ |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 33 | out="" # intermediate, preprocessed, file |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 34 | pre=-1 # preprocess (first line) |
John Bowler | d497383 | 2011-11-08 19:34:54 -0600 | [diff] [blame] | 35 | version="libpng version unknown" # version information |
| 36 | version_file="" # where to find the version |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 37 | err=0 # in-line exit sets this |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 38 | # The following definitions prevent the C preprocessor noticing the lines |
| 39 | # that will be in the final output file. Some C preprocessors tokenise |
| 40 | # the lines, for example by inserting spaces around operators, and all |
| 41 | # C preprocessors notice lines that start with '#', most remove comments. |
| 42 | # The technique adopted here is to make the final output lines into |
| 43 | # C strings (enclosed in double quotes), preceeded by PNG_DFN. As a |
| 44 | # consequence the output cannot contain a 'raw' double quote - instead put |
| 45 | # @' in, this will be replaced by a single " afterward. See the parser |
| 46 | # script dfn.awk for more capabilities (not required here). Note that if |
| 47 | # you need a " in a 'setting' in pnglibconf.dfa it must also be @'! |
| 48 | dq="@'" # For a single double quote |
| 49 | start=" PNG_DFN \"" # Start stuff to output (can't contain a "!) |
| 50 | end="\" " # End stuff to output |
| 51 | subs="@\" " # Substitute start (substitute a C macro) |
| 52 | sube=" \"@" # Substitute end |
| 53 | comment=start "/*" # Comment start |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 54 | cend="*/" end # Comment end |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 55 | def=start "#define PNG_" # Arbitrary define |
| 56 | sup="_SUPPORTED" end # end supported option |
| 57 | und=comment "#undef PNG_" # Unsupported option |
| 58 | une="_SUPPORTED" cend # end unsupported option |
| 59 | error=start "ERROR:" # error message, terminate with 'end' |
Glenn Randers-Pehrson | cd74549 | 2010-04-28 07:52:16 -0500 | [diff] [blame] | 60 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 61 | # Variables |
| 62 | deb=0 # debug - set on command line |
| 63 | everything="" # do not override defaults |
| 64 | logunsupported=0 # write unsupported options too |
Glenn Randers-Pehrson | af855e4 | 2011-05-07 10:52:49 -0500 | [diff] [blame] | 65 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 66 | # Precreate arrays |
John Bowler | f372810 | 2013-03-04 16:26:31 -0600 | [diff] [blame] | 67 | # for each option: |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 68 | option[""] = "" # list of all options: default enabled/disabled |
| 69 | done[""] = 1 # marks option as having been output |
| 70 | requires[""] = "" # requires by option |
| 71 | iffs[""] = "" # if by option |
| 72 | enabledby[""] = "" # options that enable it by option |
John Bowler | f372810 | 2013-03-04 16:26:31 -0600 | [diff] [blame] | 73 | sets[""] = "" # settings set by each option |
| 74 | setval[""] = "" # value to set (indexed: 'option sets[option]') |
| 75 | # for each setting: |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 76 | setting[""] = "" # requires by setting |
| 77 | defaults[""] = "" # used for a defaulted value |
| 78 | doneset[""] = 1 # marks setting as having been output |
| 79 | r[""] = "" # Temporary array |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 80 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 81 | # For decorating the output file |
| 82 | protect = "" |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 83 | } |
| 84 | |
Glenn Randers-Pehrson | cd74549 | 2010-04-28 07:52:16 -0500 | [diff] [blame] | 85 | # The output file must be specified before any input: |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 86 | out == "" { |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 87 | print "out=output.file must be given on the command line" |
| 88 | err = 1 |
| 89 | exit 1 |
Glenn Randers-Pehrson | cd74549 | 2010-04-28 07:52:16 -0500 | [diff] [blame] | 90 | } |
| 91 | |
| 92 | # The very first line indicates whether we are reading pre-processed |
| 93 | # input or not, this must come *first* because 'PREPROCESSED' needs |
| 94 | # to be the very first line in the temporary file. |
| 95 | pre == -1{ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 96 | if ($0 == "PREPROCESSED") { |
| 97 | pre = 0 |
| 98 | next |
| 99 | } else { |
| 100 | pre = 1 |
| 101 | print "PREPROCESSED" >out |
| 102 | # And fall through to continue processing |
| 103 | } |
Glenn Randers-Pehrson | cd74549 | 2010-04-28 07:52:16 -0500 | [diff] [blame] | 104 | } |
| 105 | |
John Bowler | d497383 | 2011-11-08 19:34:54 -0600 | [diff] [blame] | 106 | # While pre-processing if version is set to "search" look for a version string |
| 107 | # in the following file. |
| 108 | pre && version == "search" && version_file == ""{ |
| 109 | version_file = FILENAME |
John Bowler | 92a1d46 | 2011-11-07 22:19:30 -0600 | [diff] [blame] | 110 | } |
| 111 | |
John Bowler | d497383 | 2011-11-08 19:34:54 -0600 | [diff] [blame] | 112 | pre && version == "search" && version_file != FILENAME{ |
| 113 | print "version string not found in", version_file |
| 114 | err = 1 |
| 115 | exit 1 |
| 116 | } |
| 117 | |
| 118 | pre && version == "search" && $0 ~ /^ \* libpng version/{ |
| 119 | version = substr($0, 4) |
| 120 | print "version =", version >out |
| 121 | next |
| 122 | } |
| 123 | |
| 124 | pre && FILENAME == version_file{ |
John Bowler | 92a1d46 | 2011-11-07 22:19:30 -0600 | [diff] [blame] | 125 | next |
| 126 | } |
| 127 | |
Glenn Randers-Pehrson | a272d8f | 2010-06-25 21:45:31 -0500 | [diff] [blame] | 128 | # variable=value |
| 129 | # Sets the given variable to the given value (the syntax is fairly |
| 130 | # free form, except for deb (you are expected to understand how to |
| 131 | # set the debug variable...) |
| 132 | # |
| 133 | # This happens before the check on 'pre' below skips most of the |
| 134 | # rest of the actions, so the variable settings happen during |
| 135 | # preprocessing but are recorded in the END action too. This |
| 136 | # allows them to be set on the command line too. |
John Bowler | 92a1d46 | 2011-11-07 22:19:30 -0600 | [diff] [blame] | 137 | $0 ~ /^[ ]*version[ ]*=/{ |
| 138 | sub(/^[ ]*version[ ]*=[ ]*/, "") |
| 139 | version = $0 |
| 140 | next |
| 141 | } |
Glenn Randers-Pehrson | a272d8f | 2010-06-25 21:45:31 -0500 | [diff] [blame] | 142 | $0 ~ /^[ ]*everything[ =]*off[ ]*$/{ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 143 | everything = "off" |
| 144 | next |
Glenn Randers-Pehrson | a272d8f | 2010-06-25 21:45:31 -0500 | [diff] [blame] | 145 | } |
| 146 | $0 ~ /^[ ]*everything[ =]*on[ ]*$/{ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 147 | everything = "on" |
| 148 | next |
Glenn Randers-Pehrson | a272d8f | 2010-06-25 21:45:31 -0500 | [diff] [blame] | 149 | } |
| 150 | $0 ~ /^[ ]*logunsupported[ =]*0[ ]*$/{ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 151 | logunsupported = 0 |
| 152 | next |
Glenn Randers-Pehrson | a272d8f | 2010-06-25 21:45:31 -0500 | [diff] [blame] | 153 | } |
| 154 | $0 ~ /^[ ]*logunsupported[ =]*1[ ]*$/{ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 155 | logunsupported = 1 |
| 156 | next |
Glenn Randers-Pehrson | a272d8f | 2010-06-25 21:45:31 -0500 | [diff] [blame] | 157 | } |
| 158 | $1 == "deb" && $2 == "=" && NF == 3{ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 159 | deb = $3 |
| 160 | next |
Glenn Randers-Pehrson | a272d8f | 2010-06-25 21:45:31 -0500 | [diff] [blame] | 161 | } |
| 162 | |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 163 | # Preprocessing - this just copies the input file with lines |
| 164 | # that need preprocessing (just chunk at present) expanded |
Glenn Randers-Pehrson | 5feb87c | 2010-06-21 12:28:05 -0500 | [diff] [blame] | 165 | # The bare "pre" instead of "pre != 0" crashes under Sunos awk |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 166 | pre && $1 != "chunk"{ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 167 | print >out |
| 168 | next |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 169 | } |
| 170 | |
| 171 | # The first characters of the line determine how it is processed, |
| 172 | # leading spaces are ignored. In general tokens that are not |
| 173 | # keywords are the names of options. An option 'name' is |
| 174 | # controlled by the definition of the corresponding macros: |
| 175 | # |
| 176 | # PNG_name_SUPPORTED The option is turned on |
| 177 | # PNG_NO_name |
| 178 | # PNG_NO_name_SUPPORTED If the first macro is not defined |
| 179 | # either of these will turn the option off |
| 180 | # |
| 181 | # If none of these macros are defined the option is turned on, unless |
| 182 | # the keyword 'off' is given in a line relating to the option. The |
| 183 | # keyword 'on' can also be given, but it will be ignored (since it is |
| 184 | # the default.) |
| 185 | # |
| 186 | # In the syntax below a 'name' is indicated by "NAME", other macro |
| 187 | # values are indicated by "MACRO", as with "NAME" the leading "PNG_" |
| 188 | # is omitted, but in this case the "NO_" prefix and the "_SUPPORTED" |
| 189 | # suffix are never used. |
| 190 | # |
| 191 | # Each line is introduced by a keyword - the first non-space characters |
| 192 | # on the line. A line starting with a '#' is a comment - it is totally |
| 193 | # ignored. Keywords are as follows, a NAME, is simply a macro name |
| 194 | # without the leading PNG_, PNG_NO_ or the trailing _SUPPORTED. |
| 195 | |
| 196 | $1 ~ /^#/ || $0 ~ /^[ ]*$/{ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 197 | next |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 198 | } |
| 199 | |
| 200 | # com <comment> |
| 201 | # The whole line is placed in the output file as a comment with |
| 202 | # the preceding 'com' removed |
| 203 | $1 == "com"{ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 204 | if (NF > 1) { |
| 205 | # sub(/^[ ]*com[ ]*/, "") |
| 206 | $1 = "" |
John Bowler | f372810 | 2013-03-04 16:26:31 -0600 | [diff] [blame] | 207 | print comment $0, cend >out |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 208 | } else |
| 209 | print start end >out |
| 210 | next |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 211 | } |
| 212 | |
John Bowler | 92a1d46 | 2011-11-07 22:19:30 -0600 | [diff] [blame] | 213 | # version |
| 214 | # Inserts a version comment |
| 215 | $1 == "version" && NF == 1{ |
| 216 | if (version == "") { |
| 217 | print "ERROR: no version string set" |
| 218 | err = 1 # prevent END{} running |
| 219 | exit 1 |
| 220 | } |
| 221 | |
| 222 | print comment, version, cend >out |
| 223 | next |
| 224 | } |
| 225 | |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 226 | # file output input protect |
| 227 | # Informational: the official name of the input file (without |
| 228 | # make generated local directories), the official name of the |
| 229 | # output file and, if required, a name to use in a protection |
| 230 | # macro for the contents. |
| 231 | $1 == "file" && NF >= 2{ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 232 | print comment, $2, cend >out |
| 233 | print comment, "Machine generated file: DO NOT EDIT", cend >out |
| 234 | if (NF >= 3) |
| 235 | print comment, "Derived from:", $3, cend >out |
| 236 | protect = $4 |
| 237 | if (protect != "") { |
| 238 | print start "#ifndef", protect end >out |
| 239 | print start "#define", protect end >out |
| 240 | } |
| 241 | next |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 242 | } |
| 243 | |
John Bowler | f372810 | 2013-03-04 16:26:31 -0600 | [diff] [blame] | 244 | # option NAME ( (requires|enables|if) NAME* | on | off | disabled | |
| 245 | # sets SETTING VALUE+ )* |
| 246 | # |
Glenn Randers-Pehrson | cd74549 | 2010-04-28 07:52:16 -0500 | [diff] [blame] | 247 | # Declares an option 'NAME' and describes its default setting (disabled) |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 248 | # and its relationship to other options. The option is disabled |
| 249 | # unless *all* the options listed after 'requires' are set and at |
| 250 | # least one of the options listed after 'if' is set. If the |
| 251 | # option is set then it turns on all the options listed after 'enables'. |
Glenn Randers-Pehrson | cd74549 | 2010-04-28 07:52:16 -0500 | [diff] [blame] | 252 | # |
| 253 | # Note that "enables" takes priority over the required/if/disabled/off |
| 254 | # setting of the target option. |
| 255 | # |
| 256 | # The definition file may list an option as 'disabled': off by default, |
| 257 | # otherwise the option is enabled: on by default. A later (and it must |
| 258 | # be later) entry may turn an option on or off explicitly. |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 259 | |
| 260 | $1 == "option" && NF >= 2{ |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 261 | opt = $2 |
| 262 | sub(/,$/,"",opt) |
| 263 | onoff = option[opt] # records current (and the default is "", enabled) |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 264 | key = "" |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 265 | istart = 3 |
| 266 | do { |
| 267 | if (istart == 1) { # continuation line |
| 268 | val = getline |
| 269 | |
| 270 | if (val != 1) { # error reading it |
| 271 | if (val == 0) |
Glenn Randers-Pehrson | 5808e7b | 2014-05-19 18:10:56 -0500 | [diff] [blame] | 272 | print "option", opt ": ERROR: missing continuation line" |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 273 | else |
| 274 | print "option", opt ": ERROR: error reading continuation line" |
| 275 | |
| 276 | # This is a hard error |
| 277 | err = 1 # prevent END{} running |
| 278 | exit 1 |
Glenn Randers-Pehrson | f3af706 | 2012-02-02 23:11:45 -0600 | [diff] [blame] | 279 | } |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | for (i=istart; i<=NF; ++i) { |
| 283 | val=$(i) |
| 284 | sub(/,$/,"",val) |
Glenn Randers-Pehrson | c912050 | 2013-11-22 14:58:04 -0600 | [diff] [blame] | 285 | if (val == "on" || val == "off" || val == "disabled" || val =="enabled") { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 286 | key = "" |
| 287 | if (onoff != val) { |
| 288 | # on or off can zap disabled or enabled: |
| 289 | if (onoff == "" || (onoff == "disabled" || onoff == "enabled") && |
| 290 | (val == "on" || val == "off")) { |
| 291 | # It's easy to mis-spell the option when turning it |
| 292 | # on or off, so warn about it here: |
| 293 | if (onoff == "" && (val == "on" || val == "off")) { |
| 294 | print "option", opt ": ERROR: turning unrecognized option", val |
| 295 | # For the moment error out - it is safer |
| 296 | err = 1 # prevent END{} running |
| 297 | exit 1 |
| 298 | } |
| 299 | onoff = val |
| 300 | } else { |
| 301 | # Print a message, otherwise the error |
| 302 | # below is incomprehensible |
| 303 | print "option", opt ": currently", onoff ": attempt to turn", val |
| 304 | break |
| 305 | } |
| 306 | } |
John Bowler | f372810 | 2013-03-04 16:26:31 -0600 | [diff] [blame] | 307 | } else if (val == "requires" || val == "if" || val == "enables" || val =="sets") { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 308 | key = val |
| 309 | } else if (key == "requires") { |
| 310 | requires[opt] = requires[opt] " " val |
| 311 | } else if (key == "if") { |
| 312 | iffs[opt] = iffs[opt] " " val |
| 313 | } else if (key == "enables") { |
| 314 | enabledby[val] = enabledby[val] " " opt |
John Bowler | f372810 | 2013-03-04 16:26:31 -0600 | [diff] [blame] | 315 | } else if (key == "sets") { |
| 316 | sets[opt] = sets[opt] " " val |
| 317 | key = "setval" |
| 318 | set = val |
| 319 | } else if (key == "setval") { |
| 320 | setval[opt " " set] = setval[opt " " set] " " val |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 321 | } else |
| 322 | break # bad line format |
| 323 | } |
| 324 | |
| 325 | istart = 1 |
| 326 | } while (i > NF && $0 ~ /,$/) |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 327 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 328 | if (i > NF) { |
| 329 | # Set the option, defaulting to 'enabled' |
| 330 | if (onoff == "") onoff = "enabled" |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 331 | option[opt] = onoff |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 332 | next |
| 333 | } |
| 334 | # Else fall through to the error handler |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 335 | } |
| 336 | |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 337 | # chunk NAME [requires OPT] [enables LIST] [on|off|disabled] |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 338 | # Expands to the 'option' settings appropriate to the reading and |
| 339 | # writing of an ancilliary PNG chunk 'NAME': |
| 340 | # |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 341 | # option READ_NAME requires READ_ANCILLARY_CHUNKS [READ_OPT] |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 342 | # option READ_NAME enables NAME LIST |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 343 | # [option READ_NAME off] |
| 344 | # option WRITE_NAME requires WRITE_ANCILLARY_CHUNKS [WRITE_OPT] |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 345 | # option WRITE_NAME enables NAME LIST |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 346 | # [option WRITE_NAME off] |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 347 | |
Glenn Randers-Pehrson | 5feb87c | 2010-06-21 12:28:05 -0500 | [diff] [blame] | 348 | pre != 0 && $1 == "chunk" && NF >= 2{ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 349 | # 'chunk' is handled on the first pass by writing appropriate |
| 350 | # 'option' lines into the intermediate file. |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 351 | opt = $2 |
| 352 | sub(/,$/,"",opt) |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 353 | onoff = "" |
| 354 | reqread = "" |
| 355 | reqwrite = "" |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 356 | enables = "" |
| 357 | req = 0 |
| 358 | istart = 3 |
| 359 | do { |
| 360 | if (istart == 1) { # continuation line |
| 361 | val = getline |
| 362 | |
| 363 | if (val != 1) { # error reading it |
| 364 | if (val == 0) |
Glenn Randers-Pehrson | 5808e7b | 2014-05-19 18:10:56 -0500 | [diff] [blame] | 365 | print "chunk", opt ": ERROR: missing continuation line" |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 366 | else |
| 367 | print "chunk", opt ": ERROR: error reading continuation line" |
| 368 | |
| 369 | # This is a hard error |
| 370 | err = 1 # prevent END{} running |
| 371 | exit 1 |
| 372 | } |
| 373 | } |
| 374 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 375 | # read the keywords/additional OPTS |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 376 | for (i=istart; i<=NF; ++i) { |
| 377 | val = $(i) |
| 378 | sub(/,$/,"",val) |
| 379 | if (val == "on" || val == "off" || val == "disabled") { |
| 380 | if (onoff != val) { |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 381 | if (onoff == "") |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 382 | onoff = val |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 383 | else |
| 384 | break # on/off conflict |
| 385 | } |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 386 | req = 0 |
| 387 | } else if (val == "requires") |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 388 | req = 1 |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 389 | else if (val == "enables") |
| 390 | req = 2 |
| 391 | else if (req == 1){ |
| 392 | reqread = reqread " READ_" val |
| 393 | reqwrite = reqwrite " WRITE_" val |
| 394 | } else if (req == 2) |
| 395 | enables = enables " " val |
| 396 | else |
John Bowler | b11b31a | 2012-03-21 07:55:46 -0500 | [diff] [blame] | 397 | break # bad line: handled below |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 398 | } |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 399 | |
| 400 | istart = 1 |
| 401 | } while (i > NF && $0 ~ /,$/) |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 402 | |
| 403 | if (i > NF) { |
| 404 | # Output new 'option' lines to the intermediate file (out) |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 405 | print "option READ_" opt, "requires READ_ANCILLARY_CHUNKS" reqread, "enables", opt enables , onoff >out |
| 406 | print "option WRITE_" opt, "requires WRITE_ANCILLARY_CHUNKS" reqwrite, "enables", opt enables, onoff >out |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 407 | next |
| 408 | } |
| 409 | # Else hit the error handler below - bad line format! |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 410 | } |
| 411 | |
| 412 | # setting MACRO ( requires MACRO* )* [ default VALUE ] |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 413 | # Behaves in a similar way to 'option' without looking for NO_ or |
| 414 | # _SUPPORTED; the macro is enabled if it is defined so long as all |
| 415 | # the 'requires' macros are also defined. The definitions may be |
| 416 | # empty, an error will be issued if the 'requires' macros are |
| 417 | # *not* defined. If given the 'default' value is used if the |
| 418 | # macro is not defined. The default value will be re-tokenised. |
| 419 | # (BTW: this is somewhat restrictive, it mainly exists for the |
| 420 | # support of non-standard configurations and numeric parameters, |
Glenn Randers-Pehrson | af855e4 | 2011-05-07 10:52:49 -0500 | [diff] [blame] | 421 | # see the uses in scripts/options.dat |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 422 | |
| 423 | $1 == "setting" && (NF == 2 || NF >= 3 && ($3 == "requires" || $3 == "default")){ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 424 | reqs = "" |
| 425 | deflt = "" |
| 426 | isdef = 0 |
| 427 | key = "" |
| 428 | for (i=3; i<=NF; ++i) |
| 429 | if ($(i) == "requires" || $(i) == "default") { |
| 430 | key = $(i) |
| 431 | if (key == "default") isdef = 1 |
| 432 | } else if (key == "requires") |
| 433 | reqs = reqs " " $(i) |
| 434 | else if (key == "default") |
| 435 | deflt = deflt " " $(i) |
| 436 | else |
| 437 | break # Format error, handled below |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 438 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 439 | setting[$2] = reqs |
| 440 | # NOTE: this overwrites a previous value silently |
| 441 | if (isdef && deflt == "") |
| 442 | deflt = " " # as a flag to force output |
| 443 | defaults[$2] = deflt |
| 444 | next |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 445 | } |
| 446 | |
| 447 | # The order of the dependency lines (option, chunk, setting) is irrelevant |
| 448 | # - the 'enables', 'requires' and 'if' settings will be used to determine |
Glenn Randers-Pehrson | 98b4f00 | 2010-04-16 22:30:26 -0500 | [diff] [blame] | 449 | # the correct order in the output and the final values in pnglibconf.h are |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 450 | # not order dependent. 'requires' and 'if' entries take precedence over |
| 451 | # 'enables' from other options; if an option requires another option it |
| 452 | # won't be set regardless of any options that enable it unless the other |
| 453 | # option is also enabled. |
| 454 | # |
| 455 | # Similarly 'enables' trumps a NO_ definition in CFLAGS or pngusr.h |
| 456 | # |
| 457 | # For simplicity cycles in the definitions are regarded as errors, |
| 458 | # even if they are not ambiguous. |
| 459 | # A given NAME can be specified in as many 'option' lines as required, the |
| 460 | # definitions are additive. |
| 461 | |
| 462 | # For backwards compatibility equivalent macros may be listed thus: |
| 463 | # |
| 464 | # = [NO_]NAME MACRO |
| 465 | # Makes -DMACRO equivalent to -DPNG_NO_NAME or -DPNG_NAME_SUPPORTED |
| 466 | # as appropriate. |
| 467 | # |
| 468 | # The definition is injected into the C compiler input when encountered |
| 469 | # in the second pass (so all these definitions appear *after* the @ |
| 470 | # lines!) |
| 471 | # |
| 472 | # 'NAME' is as above, but 'MACRO' is the full text of the equivalent |
| 473 | # old, deprecated, macro. |
| 474 | |
| 475 | $1 == "=" && NF == 3{ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 476 | print "#ifdef PNG_" $3 >out |
| 477 | if ($2 ~ /^NO_/) |
| 478 | print "# define PNG_" $2 >out |
| 479 | else |
| 480 | print "# define PNG_" $2 "_SUPPORTED" >out |
| 481 | print "#endif" >out |
| 482 | next |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 483 | } |
| 484 | |
| 485 | # Lines may be injected into the C compiler input by preceding them |
| 486 | # with an "@" character. The line is copied with just the leading |
| 487 | # @ removed. |
| 488 | |
| 489 | $1 ~ /^@/{ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 490 | # sub(/^[ ]*@/, "") |
| 491 | $1 = substr($1, 2) |
| 492 | print >out |
| 493 | next |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 494 | } |
| 495 | |
Glenn Randers-Pehrson | 5808e7b | 2014-05-19 18:10:56 -0500 | [diff] [blame] | 496 | # Check for unrecognized lines, because of the preprocessing chunk |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 497 | # format errors will be detected on the first pass independent of |
| 498 | # any other format errors. |
| 499 | { |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 500 | print "options.awk: bad line (" NR "):", $0 |
| 501 | err = 1 # prevent END{} running |
| 502 | exit 1 |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 503 | } |
| 504 | |
| 505 | # For checking purposes names that start with "ok_" or "fail_" are |
Glenn Randers-Pehrson | 98b4f00 | 2010-04-16 22:30:26 -0500 | [diff] [blame] | 506 | # not output to pnglibconf.h and must be either enabled or disabled |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 507 | # respectively for the build to succeed. This allows interdependencies |
| 508 | # between options of the form "at least one of" or "at most one of" |
| 509 | # to be checked. For example: |
| 510 | # |
| 511 | # option FLOATING_POINT enables ok_math |
| 512 | # option FIXED_POINT enables ok_math |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 513 | # This ensures that at least one of FLOATING_POINT and FIXED_POINT |
| 514 | # must be set for the build to succeed. |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 515 | # |
| 516 | # option fail_math requires FLOATING_POINT FIXED_POINT |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 517 | # This means the build will fail if *both* FLOATING_POINT and |
| 518 | # FIXED_POINT are set (this is an example; in fact both are allowed.) |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 519 | # |
| 520 | # If all these options were given the build would require exactly one |
| 521 | # of the names to be enabled. |
| 522 | |
| 523 | END{ |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 524 | # END{} gets run on an exit (a traditional awk feature) |
| 525 | if (err) exit 1 |
Glenn Randers-Pehrson | cd74549 | 2010-04-28 07:52:16 -0500 | [diff] [blame] | 526 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 527 | if (pre) { |
| 528 | # Record the final value of the variables |
| 529 | print "deb =", deb >out |
| 530 | if (everything != "") { |
| 531 | print "everything =", everything >out |
| 532 | } |
| 533 | print "logunsupported =", logunsupported >out |
| 534 | exit 0 |
| 535 | } |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 536 | |
John Bowler | f372810 | 2013-03-04 16:26:31 -0600 | [diff] [blame] | 537 | # Do the options first (allowing options to set settings). The dependency |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 538 | # tree is thus: |
| 539 | # |
| 540 | # name > name |
| 541 | # name requires name |
| 542 | # name if name |
| 543 | # name enabledby name |
| 544 | # |
| 545 | # First build a list 'tree' by option of all the things on which |
| 546 | # it depends. |
| 547 | print "" >out |
| 548 | print "/* OPTIONS */" >out |
| 549 | print comment, "options", cend >out |
| 550 | for (opt in enabledby) tree[opt] = 1 # may not be explicit options |
| 551 | for (opt in option) if (opt != "") { |
| 552 | o = option[opt] |
| 553 | # option should always be one of the following values |
| 554 | if (o != "on" && o != "off" && o != "disabled" && o != "enabled") { |
| 555 | print "internal option error (" o ")" |
| 556 | exit 1 |
| 557 | } |
| 558 | tree[opt] = "" # so unlisted options marked |
| 559 | } |
| 560 | for (opt in tree) if (opt != "") { |
| 561 | if (tree[opt] == 1) { |
| 562 | tree[opt] = "" |
| 563 | if (option[opt] != "") { |
| 564 | print "internal error (1)" |
| 565 | exit 1 |
| 566 | } |
| 567 | # Macros only listed in 'enables' remain off unless |
| 568 | # one of the enabling macros is on. |
| 569 | option[opt] = "disabled" |
| 570 | } |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 571 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 572 | split("", list) # clear 'list' |
| 573 | # Now add every requires, iffs or enabledby entry to 'list' |
| 574 | # so that we can add a unique list of requirements to tree[i] |
| 575 | split(requires[opt] iffs[opt] enabledby[opt], r) |
| 576 | for (i in r) list[r[i]] = 1 |
| 577 | for (i in list) tree[opt] = tree[opt] " " i |
| 578 | } |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 579 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 580 | # print the tree for extreme debugging |
| 581 | if (deb > 2) for (i in tree) if (i != "") print i, "depends-on" tree[i] |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 582 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 583 | # Ok, now check all options marked explicitly 'on' or 'off': |
| 584 | # |
| 585 | # If an option[opt] is 'on' then turn on all requires[opt] |
| 586 | # If an option[opt] is 'off' then turn off all enabledby[opt] |
| 587 | # |
Glenn Randers-Pehrson | 5808e7b | 2014-05-19 18:10:56 -0500 | [diff] [blame] | 588 | # Error out if we have to turn 'on' to an 'off' option or vice versa. |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 589 | npending = 0 |
| 590 | for (opt in option) if (opt != "") { |
| 591 | if (option[opt] == "on" || option[opt] == "off") { |
| 592 | pending[++npending] = opt |
| 593 | } |
| 594 | } |
Glenn Randers-Pehrson | cd74549 | 2010-04-28 07:52:16 -0500 | [diff] [blame] | 595 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 596 | err = 0 # set on error |
| 597 | while (npending > 0) { |
| 598 | opt = pending[npending--] |
| 599 | if (option[opt] == "on") { |
| 600 | nreqs = split(requires[opt], r) |
| 601 | for (j=1; j<=nreqs; ++j) { |
| 602 | if (option[r[j]] == "off") { |
| 603 | print "option", opt, "turned on, but requirement", r[j], "is turned off" |
| 604 | err = 1 |
| 605 | } else if (option[r[j]] != "on") { |
| 606 | option[r[j]] = "on" |
| 607 | pending[++npending] = r[j] |
| 608 | } |
| 609 | } |
| 610 | } else { |
| 611 | if (option[opt] != "off") { |
| 612 | print "internal error (2)" |
| 613 | exit 1 |
| 614 | } |
| 615 | nreqs = split(enabledby[opt], r) |
| 616 | for (j=1; j<=nreqs; ++j) { |
| 617 | if (option[r[j]] == "on") { |
| 618 | print "option", opt, "turned off, but enabled by", r[j], "which is turned on" |
| 619 | err = 1 |
| 620 | } else if (option[r[j]] != "off") { |
| 621 | option[r[j]] = "off" |
| 622 | pending[++npending] = r[j] |
| 623 | } |
| 624 | } |
| 625 | } |
| 626 | } |
| 627 | if (err) exit 1 |
Glenn Randers-Pehrson | cd74549 | 2010-04-28 07:52:16 -0500 | [diff] [blame] | 628 | |
John Bowler | f372810 | 2013-03-04 16:26:31 -0600 | [diff] [blame] | 629 | # Sort options: |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 630 | print "PNG_DFN_START_SORT 2" >out |
| 631 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 632 | # option[i] is now the complete list of all the tokens we may |
| 633 | # need to output, go through it as above, depth first. |
| 634 | finished = 0 |
| 635 | while (!finished) { |
| 636 | finished = 1 |
| 637 | movement = 0 # done nothing |
| 638 | for (i in option) if (!done[i]) { |
| 639 | nreqs = split(tree[i], r) |
| 640 | if (nreqs > 0) { |
| 641 | for (j=1; j<=nreqs; ++j) if (!done[r[j]]) { |
| 642 | break |
| 643 | } |
| 644 | if (j<=nreqs) { |
| 645 | finished = 0 |
| 646 | continue # next option |
| 647 | } |
| 648 | } |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 649 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 650 | # All the requirements have been processed, output |
| 651 | # this option. An option is _SUPPORTED if: |
| 652 | # |
| 653 | # all 'requires' are _SUPPORTED AND |
| 654 | # at least one of the 'if' options are _SUPPORTED AND |
| 655 | # EITHER: |
| 656 | # The name is _SUPPORTED (on the command line) |
| 657 | # OR: |
| 658 | # an 'enabledby' is _SUPPORTED |
| 659 | # OR: |
| 660 | # NO_name is not defined AND |
| 661 | # the option is not disabled; an option is disabled if: |
| 662 | # option == off |
| 663 | # option == disabled && everything != on |
| 664 | # option == "" && everything == off |
| 665 | if (deb) print "option", i |
| 666 | print "" >out |
| 667 | print "/* option:", i, option[i] >out |
| 668 | print " * requires: " requires[i] >out |
John Bowler | f372810 | 2013-03-04 16:26:31 -0600 | [diff] [blame] | 669 | print " * if: " iffs[i] >out |
| 670 | print " * enabled-by:" enabledby[i] >out |
| 671 | print " * sets: " sets[i], "*/" >out |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 672 | print "#undef PNG_on" >out |
| 673 | print "#define PNG_on 1" >out |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 674 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 675 | # requires |
| 676 | nreqs = split(requires[i], r) |
| 677 | for (j=1; j<=nreqs; ++j) { |
| 678 | print "#ifndef PNG_" r[j] "_SUPPORTED" >out |
| 679 | print "# undef PNG_on /*!" r[j] "*/" >out |
Glenn Randers-Pehrson | 5808e7b | 2014-05-19 18:10:56 -0500 | [diff] [blame] | 680 | # This error appears in the final output if something |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 681 | # was switched 'on' but the processing above to force |
| 682 | # the requires did not work |
| 683 | if (option[i] == "on") { |
| 684 | print error, i, "requires", r[j] end >out |
| 685 | } |
| 686 | print "#endif" >out |
| 687 | } |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 688 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 689 | # if |
Glenn Randers-Pehrson | c912050 | 2013-11-22 14:58:04 -0600 | [diff] [blame] | 690 | have_ifs = 0 |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 691 | nreqs = split(iffs[i], r) |
| 692 | print "#undef PNG_no_if" >out |
| 693 | if (nreqs > 0) { |
Glenn Randers-Pehrson | c912050 | 2013-11-22 14:58:04 -0600 | [diff] [blame] | 694 | have_ifs = 1 |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 695 | print "/* if" iffs[i], "*/" >out |
| 696 | print "#define PNG_no_if 1" >out |
| 697 | for (j=1; j<=nreqs; ++j) { |
| 698 | print "#ifdef PNG_" r[j] "_SUPPORTED" >out |
| 699 | print "# undef PNG_no_if /*" r[j] "*/" >out |
| 700 | print "#endif" >out |
| 701 | } |
| 702 | print "#ifdef PNG_no_if /*missing if*/" >out |
| 703 | print "# undef PNG_on" >out |
| 704 | # There is no checking above for this, because we |
| 705 | # don't know which 'if' to choose, so whine about |
| 706 | # it here: |
| 707 | if (option[i] == "on") { |
| 708 | print error, i, "needs one of:", iffs[i] end >out |
| 709 | } |
| 710 | print "#endif" >out |
| 711 | } |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 712 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 713 | print "#ifdef PNG_on /*requires, if*/" >out |
| 714 | # enables |
| 715 | print "# undef PNG_not_enabled" >out |
| 716 | print "# define PNG_not_enabled 1" >out |
| 717 | print " /* enabled by" enabledby[i], "*/" >out |
| 718 | nreqs = split(enabledby[i], r) |
| 719 | for (j=1; j<=nreqs; ++j) { |
| 720 | print "#ifdef PNG_" r[j] "_SUPPORTED" >out |
| 721 | print "# undef PNG_not_enabled /*" r[j] "*/" >out |
| 722 | # Oops, probably not intended (should be factored |
| 723 | # out by the checks above). |
| 724 | if (option[i] == "off") { |
| 725 | print error, i, "enabled by:", r[j] end >out |
| 726 | } |
| 727 | print "#endif" >out |
| 728 | } |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 729 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 730 | print "# ifndef PNG_" i "_SUPPORTED /*!command line*/" >out |
| 731 | print "# ifdef PNG_not_enabled /*!enabled*/" >out |
Glenn Randers-Pehrson | c912050 | 2013-11-22 14:58:04 -0600 | [diff] [blame] | 732 | # 'have_ifs' here means that everything = "off" still allows an 'if' on |
| 733 | # an otherwise enabled option to turn it on; otherwise the 'if' |
| 734 | # handling is effectively disabled by 'everything = off' |
| 735 | if (option[i] == "off" || option[i] == "disabled" && everything != "on" || option[i] == "enabled" && everything == "off" && !have_ifs) { |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 736 | print "# undef PNG_on /*default off*/" >out |
| 737 | } else { |
| 738 | print "# ifdef PNG_NO_" i >out |
| 739 | print "# undef PNG_on /*turned off*/" >out |
| 740 | print "# endif" >out |
| 741 | print "# ifdef PNG_NO_" i "_SUPPORTED" >out |
| 742 | print "# undef PNG_on /*turned off*/" >out |
| 743 | print "# endif" >out |
| 744 | } |
| 745 | print "# endif /*!enabled*/" >out |
| 746 | print "# ifdef PNG_on" >out |
| 747 | # The _SUPPORTED macro must be defined so that dependent |
| 748 | # options output later work. |
| 749 | print "# define PNG_" i "_SUPPORTED" >out |
| 750 | print "# endif" >out |
| 751 | print "# endif /*!command line*/" >out |
| 752 | # If PNG_on is still set the option should be defined in |
| 753 | # pnglibconf.h |
| 754 | print "# ifdef PNG_on" >out |
| 755 | if (i ~ /^fail_/) { |
| 756 | print error, i, "is on: enabled by:" iffs[i] enabledby[i] ", requires" requires[i] end >out |
| 757 | } else if (i !~ /^ok_/) { |
| 758 | print def i sup >out |
John Bowler | f372810 | 2013-03-04 16:26:31 -0600 | [diff] [blame] | 759 | # Supported option, set required settings |
| 760 | nreqs = split(sets[i], r) |
| 761 | for (j=1; j<=nreqs; ++j) { |
| 762 | print "# ifdef PNG_set_" r[j] >out |
| 763 | # Some other option has already set a value: |
| 764 | print error, i, "sets", r[j] ": duplicate setting" end >out |
| 765 | print error, " previous value: " end "PNG_set_" r[j] >out |
| 766 | print "# else" >out |
| 767 | # Else set the default: note that this won't accept arbitrary |
| 768 | # values, the setval string must be acceptable to all the C |
| 769 | # compilers we use. That means it must be VERY simple; a number, |
| 770 | # a name or a string. |
| 771 | print "# define PNG_set_" r[j], setval[i " " r[j]] >out |
| 772 | print "# endif" >out |
| 773 | } |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 774 | } |
| 775 | print "# endif /* definition */" >out |
| 776 | print "#endif /*requires, if*/" >out |
| 777 | if (logunsupported || i ~ /^ok_/) { |
| 778 | print "#ifndef PNG_on" >out |
| 779 | if (logunsupported) { |
| 780 | print und i une >out |
| 781 | } |
| 782 | if (i ~ /^ok_/) { |
| 783 | print error, i, "not enabled: requires:" requires[i] ", enabled by:" iffs[i] enabledby[i] end >out |
| 784 | } |
| 785 | print "#endif" >out |
| 786 | } |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 787 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 788 | done[i] = 1 |
| 789 | ++movement |
| 790 | } |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 791 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 792 | if (!finished && !movement) { |
| 793 | print "option: loop or missing option in dependency tree, cannot process:" |
| 794 | for (i in option) if (!done[i]) { |
| 795 | print " option", i, "depends on" tree[i], "needs:" |
| 796 | nreqs = split(tree[i], r) |
| 797 | if (nreqs > 0) for (j=1; j<=nreqs; ++j) if (!done[r[j]]) { |
| 798 | print " " r[j] |
| 799 | } |
| 800 | } |
| 801 | exit 1 |
| 802 | } |
| 803 | } |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 804 | print "PNG_DFN_END_SORT" >out |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 805 | print comment, "end of options", cend >out |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 806 | |
John Bowler | f372810 | 2013-03-04 16:26:31 -0600 | [diff] [blame] | 807 | # Do the 'setting' values second, the algorithm the standard |
| 808 | # tree walk (O(1)) done in an O(2) while/for loop; interations |
| 809 | # settings x depth, outputing the deepest required macros |
| 810 | # first. |
| 811 | print "" >out |
| 812 | print "/* SETTINGS */" >out |
| 813 | print comment, "settings", cend >out |
| 814 | # Sort (in dfn.awk) on field 2, the setting name |
| 815 | print "PNG_DFN_START_SORT 2" >out |
| 816 | finished = 0 |
| 817 | while (!finished) { |
| 818 | finished = 1 |
| 819 | movement = 0 # done nothing |
| 820 | for (i in setting) if (!doneset[i]) { |
| 821 | nreqs = split(setting[i], r) |
| 822 | if (nreqs > 0) { |
| 823 | # By default assume the requires values are options, but if there |
| 824 | # is no option with that name check for a setting |
| 825 | for (j=1; j<=nreqs; ++j) if (option[r[j]] == "" && !doneset[r[j]]) { |
| 826 | break |
| 827 | } |
| 828 | if (j<=nreqs) { |
| 829 | finished = 0 |
| 830 | continue # try a different setting |
| 831 | } |
| 832 | } |
| 833 | |
| 834 | # All the requirements have been processed, output |
| 835 | # this setting. |
| 836 | if (deb) print "setting", i |
| 837 | deflt = defaults[i] |
| 838 | # Remove any spurious trailing spaces |
| 839 | sub(/ *$/,"",deflt) |
| 840 | # A leading @ means leave it unquoted so the preprocessor |
| 841 | # can substitute the build time value |
| 842 | if (deflt ~ /^ @/) |
| 843 | deflt = " " subs substr(deflt, 3) sube |
| 844 | print "" >out |
| 845 | print "/* setting: ", i >out |
| 846 | print " * requires:" setting[i] >out |
| 847 | print " * default: ", defaults[i] deflt, "*/" >out |
| 848 | for (j=1; j<=nreqs; ++j) { |
| 849 | if (option[r[j]] != "") |
| 850 | print "#ifndef PNG_" r[j] "_SUPPORTED" >out |
| 851 | else |
| 852 | print "#ifndef PNG_" r[j] >out |
| 853 | print error, i, "requires", r[j] end >out |
| 854 | print "# endif" >out |
| 855 | } |
| 856 | # The precedence is: |
| 857 | # |
| 858 | # 1) External definition; trumps: |
| 859 | # 2) Option 'sets' value; trumps: |
| 860 | # 3) Setting 'default' |
| 861 | # |
| 862 | print "#ifdef PNG_" i >out |
| 863 | # PNG_<i> is defined, so substitute the value: |
| 864 | print def i, subs "PNG_" i sube end >out |
| 865 | print "#else /* use default */" >out |
| 866 | print "# ifdef PNG_set_" i >out |
| 867 | # Value from an option 'sets' argument |
| 868 | print def i, subs "PNG_set_" i sube end >out |
| 869 | # This is so that subsequent tests on the setting work: |
| 870 | print "# define PNG_" i, "1" >out |
| 871 | if (defaults[i] != "") { |
| 872 | print "# else /*default*/" >out |
| 873 | print def i deflt end >out |
| 874 | print "# define PNG_" i, "1" >out |
| 875 | } |
| 876 | print "# endif /* defaults */" >out |
| 877 | print "#endif /* setting", i, "*/" >out |
| 878 | |
| 879 | doneset[i] = 1 |
| 880 | ++movement |
| 881 | } |
| 882 | |
| 883 | if (!finished && !movement) { |
| 884 | print "setting: loop or missing setting in 'requires', cannot process:" |
| 885 | for (i in setting) if (!doneset[i]) { |
| 886 | print " setting", i, "requires" setting[i] |
| 887 | } |
| 888 | exit 1 |
| 889 | } |
| 890 | } |
| 891 | print "PNG_DFN_END_SORT" >out |
| 892 | print comment, "end of settings", cend >out |
| 893 | |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 894 | # Regular end - everything looks ok |
| 895 | if (protect != "") { |
Glenn Randers-Pehrson | 871b1d0 | 2013-03-02 14:58:22 -0600 | [diff] [blame] | 896 | print start "#endif", "/*", protect, "*/" end >out |
Glenn Randers-Pehrson | a313751 | 2010-08-18 20:25:36 -0500 | [diff] [blame] | 897 | } |
Glenn Randers-Pehrson | 862cb20 | 2010-04-16 22:12:51 -0500 | [diff] [blame] | 898 | } |