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Enable definition of Unicode conv. options on compiler command line.

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Three documented pre-processor variables can now be defined on the
compiler command line to avoid editing the FLTK src code. The default
values still apply unchanged.


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@11404 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Albrecht Schlosser
2016-03-23 13:36:50 +00:00
parent 4bfabbd619
commit de74c82d42
2 changed files with 18 additions and 8 deletions
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documentation/src/unicode.dox
+8 -4
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@@ -191,14 +191,14 @@ the following limitations:
\section unicode_illegals Illegal Unicode and UTF-8 sequences
Three pre-processor variables are defined in the source code that
Three pre-processor variables are defined in the source code [1] that
determine how %fl_utf8decode() handles illegal UTF-8 sequences:
- if ERRORS_TO_CP1252 is set to 1 (the default), %fl_utf8decode() will
assume that a byte sequence starting with a byte in the range 0x80
to 0x9f represents a Microsoft CP1252 character, and will instead
return the value of an equivalent UCS character. Otherwise, it
will be processed as an illegal byte value as described below.
to 0x9f represents a Microsoft CP1252 character, and will return
the value of an equivalent UCS character. Otherwise, it will be
processed as an illegal byte value as described below.
- if STRICT_RFC3629 is set to 1 (not the default!) then UTF-8
sequences that correspond to illegal UCS values are treated as
@@ -210,6 +210,10 @@ determine how %fl_utf8decode() handles illegal UTF-8 sequences:
byte value is returned unchanged, otherwise 0xFFFD, the Unicode
REPLACEMENT CHARACTER, is returned instead.
[1] Since FLTK 1.3.4 you may set these three pre-processor variables on
your compile command line with -D"variable=value" (value: 0 or 1)
to avoid editing the source code.
%fl_utf8encode() is less strict, and only generates the UTF-8
sequence for 0xFFFD, the Unicode REPLACEMENT CHARACTER, if it is
asked to encode a UCS value above U+10FFFF.