ICU-5823 Update the news.
X-SVN-Rev: 22665
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George Rhoten
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<html lang="en-US" xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US">
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<head>
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<meta name="generator" content="HTML Tidy, see www.w3.org" />
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<title>ReadMe for ICU</title>
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<meta name="COPYRIGHT" content=
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<abbr title="International Components for Unicode">ICU</abbr> 3.8
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ReadMe</h1>
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<p>Version: 2007 September 4<br />
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<p>Version: 2007 September 12<br />
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Copyright © 1997-2007 International Business Machines Corporation and
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others. All Rights Reserved.</p>
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<!-- Remember that there is a copyright at the end too -->
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this release, see the <a href="http://www.icu-project.org/download/">ICU 3.8
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download page</a>.</p>
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<h3><a name="News_app_packaging" id="News_app_packaging">Changes to packaging
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resource bundles</a></h3>
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<h3><a name="News_timezone" id="News_timezone">Changes to timezone formatting
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and parsing</a></h3>
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<p>Since ICU 3.0, the old style of packaging was deprecated, and an alternate
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packaging mode was made available. In this release, this compatibility mode
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of packaging has been removed from ICU. If you're using the genrb -P or -t
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options, you are probably using the older compatible mode of data packaging.
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This compatibility file naming mode was removed for portability and
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performance reasons.</p>
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<p>In ICU 3.8, the behavior of date formatting and parsing has changed
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significantly, perhaps requiring recoding on your part depending on your
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usage. The goal of making the change was to return more understandable
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results from formatting timezones, but a byproduct is that the result from
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formatting with strings z, zzzz, v or vvvv are no longer unique, and thus no
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longer roundtrips. That is, if you use a date format with one of these
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strings, producing a certain output, you can no longer parse that output
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and expect to recover the original timezone.</p>
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<p>Code changes should not be required to use the newer data file naming
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scheme, but you will need to update your makefile scripts, if you're using
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the older data file naming scheme. The example of using the new data file
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naming scheme can be found in <a href="source/samples/ufortune/">the ufortune
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sample program</a>.</p>
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<table border="1" cellpadding="0" summary=
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"The following are examples of the file naming schemes.">
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<caption>
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The following are examples of the file naming schemes.
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</caption>
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<tr>
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<th scope="col">Old File Naming Scheme</th>
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<th scope="col">Current File Naming Scheme</th>
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</tr>
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<tr>
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<td>MyApp_root.res</td>
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<td>MyApp/root.res</td>
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</tr>
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<tr>
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<td>MyApp_en.res</td>
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<td>MyApp/en.res</td>
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</tr>
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</table>
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<h3><a name="News_wchar_t" id="News_wchar_t">Changes to wchar_t type for the
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Microsoft Visual Studio builds</a></h3>
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<p>Previous versions of ICU built with Microsoft Visual Studio were not built
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with the /Zc:wchar_t compiler option. ICU now builds with this option turned
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on by default. This allows the built libraries to be compatible with Visual
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Studio 2005, and this makes it easier for ICU users to use MFC in their
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projects, which requires this option to be turned by default. If you do not
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use the C++ API of ICU, you are not affected by this change.</p>
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<p>If you receive any errors while linking ICU into your project, please make
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sure that you have set "Treat wchar_t as Built-in Type" to "Yes
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(/Zc:wchar_t)" in your project files.</p>
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<h3><a name="News_scanf" id="News_scanf">Changes to scanf and storing
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floating point types</a></h3>
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<p>In order to improve interoperability with standard scanf implementations,
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the icuio library's implementations of scanf has changed the default scanf
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type from <tt>double</tt> to <tt>float</tt>. This is a breaking change
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requires you to change your code if you are using the icuio library's scanf
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to read <tt>double</tt> or <tt>float</tt> values with %e, %f or %g. As a
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reminder, these scanf functions in the icuio library are still marked
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draft.</p>
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<h3><a name="News_data_package" id="News_data_package">Source download
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contains .dat package for ICU data</a></h3>
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<p>The ICU4C 3.8 source downloads contain a pre-built .dat package with ICU's
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data rather than the data source files. This is to simplify the build process
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for the majority of users and to reduce platform porting issues. If you need
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the data source files for customization, then please download the ICU source
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code from <a href="http://www.icu-project.org/repository/">subversion</a>.</p>
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<p>What you will be able to get is a related, "best fit" mapping for the
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name, based on the region associated with the current locale and the
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mappings found in CLDR's supplemental data. For example, for example, if
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you format the time zone "America/Denver", getting "Heure des Rocheuses"
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in French, and then parse, the resulting time zone would be "America/Denver"
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unless the locale in use has the region "CA" (such as en-CA or fr-CA), in
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which case "America/Edmonton" would be retrieved.</p>
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<h2><a name="Download" href="#Download" id="Download">How To Download the
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Source Code</a></h2>
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