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XML tools interpret “fonts.dtd” as a relative path.

Unfortunately, that can not work now that the configuration is spread over
multiple system-dependant directories, without a common relative path to this
file. And, an absolute path can not be defined in a system-independant way.
System independance is a requirement to share config files between systems.

Therefore, replace the broken relative path by a formal URN, that will work the
same way on all systems, without network access.

This makes the DTD registerable with commands like:
$ xmlcatalog --noout --add system \
                           "urn:fontconfig:fonts.dtd" \
                           "file:///usr/share/xml/fontconfig/fonts.dtd" \
                           /etc/xml/catalog

That enables easy config file checking:
$ xmllint --loaddtd ${config_file} >/dev/null

The previous fix in fbc05949 was wrong. reverting.

When reading older caches, FcDirCacheMapHelper() returns FcFalse and
it became the return value from FcDirCacheProcess() too, which is wrong.
Actually one of calls for FcDirCacheMapHelper() should be successfully
finished and closure should have a valid pointer for cache.

Due to this, the proper finalization process wasn't running against
cache in closure.

Fixes fontconfig/fontconfig#227

iPhone 2.1 was released a long time ago, and the macro for checking
the target iOS SDK version has changed. We can simplify everything and
do a very basic check.

This is a regression since 48e9e5f4

Due to the unproper initialization of `latest_mtime', the duplicate caches
was still in fcCacheChains with no references. which means no one frees
them. thus, the memory leak was happened.

Fixes fontconfig/fontconfig#227

Don't address the real filename when a named pipe is given in FONTCONFIG_FILE.

Try to build a fullname from a family and a style name for a named-instance.

Fixes fontconfig/fontconfig#185

Fixes fontconfig/fontconfig#201

FC_FULLNAME is affected by variables and could be different
against it. FC_FULLNAME should be dropped from meta face.

Fixes fontconfig/fontconfig#185

Empty elements need to be declared as such in well-formed DTDs.

Fixes fontconfig/fontconfig#184

This may improves to be MT-safe.

Reported at https://bugs.chromium.org/p/chromium/issues/detail?id=1004254

Right now fontconfig uses a cache found first in a path and
cachedirs are the order of the system-wide path and then the user path.
this is due to avoid writing caches into the user path when running as root.

However, changing caches by certain config only, e.g. using <match target="scan">
may not take effect by this behavior, because it may be stored into the user path.

Thus, needing to find the latest cache out from paths.

Fixes fontconfig/fontconfig#182

When loading the default config file with FONTCONFIG_SYSROOT,
it fails if no /etc/fonts/fonts.conf is available, even if it is
there where is based on sysroot.

To address this, FcConfig is required to determine the sysroot.
therefore, this change makes FcConfigFilename() deprecated,
use FcConfigGetFilename() instead.

Fixes fontconfig/fontconfig#181

cachedir is used to determine where cache files are stored.
the empty directory will ends up to put them under the top of
directory of XDG_CACHE_HOME. that messes it up and must be avoided.

As a note, if you want to read/write something from the top of
XDG_DATA_HOME (dir) and/or XDG_CACHE_HOME (cachedir),
put "." instead of the empty.

fontconfig/fontconfig#180

It is a successor of EmojiOne.

https://www.joypixels.com/

https://bugzilla.redhat.com/show_bug.cgi?id=1744377

This change reduces the call cost of strcmp 1.5 % less.

Fixes fontconfig/fontconfig#172

This may helps to enable autohint only when font doesn't have any hinting

This avoids a situation where the score of lang becomes lower or equal to others
and then figures out the best font according to other properties and the order
of family names.

This typically happens only when our orthography files are the subset of lang
in patterns. i.e. fc-match :lang=en-us to match on en.orth.
In this case, the score is lower than the exact match (en to en) and the partial
match (en to en-us). thus, the result of 'fc-match :lang=en-us' isn't necessarily
same to 'fc-match :lang=en'.

So 35-lang-normalize.conf contains languages only which is available as orth
without countries and tries to update properties to match on orth exactly like:

  <match>
    <test name="lang" compare="contains">
      <string>en</string>
    </test>
    <edit name="lang" mode="assign" binding="same">
      <string>en</string>
    </edit>
  </match>

Fixes fontconfig/fontconfig#155

Fixes fontconfig/fontconfig#170

Fallback code to UUID-based cache name was broken.

Fixes fontconfig/fontconfig#169

Fixes fontconfig/fontconfig#168

Reported by Lawrence D'Oliveiro

In some cases, non-English languages might appears first in current order.
and when having English name with non-English language ID like Google Noto CJK TC,
English name with English language ID will be dropped due to duplicate.

This fixes that issue.

Fixes fontconfig/fontconfig#167

Fixes fontconfig/fontconfig#166

Fixes fontconfig/fontconfig#165