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Fl_Text_Buffer constructor: fix "requestedSize ignored in mGapEnd".

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mGapEnd should reflect the total allocated size after the constructor
is executed, i.e. the text buffer is empty. This was not the case.

See thread "Fl_Text_Buffer constructor bug" (2016-12-05) in fltk.general.
The bug was harmless, but the pre-allocation did not work as expected, i.e.
the pre-allocated buffer size was allocated but effectively ignored later.


git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12134 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Albrecht Schlosser 2016-12-05 17:03:29 +00:00
parent 0701204518
commit b6bd386231
2 changed files with 4 additions and 2 deletions
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2
CHANGES
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@ -42,6 +42,8 @@ Changes in FLTK 1.4.0 Released: ??? ?? 2017
Bug Fixes
- (add here)
- Fix ignored buffer pre-allocation (requestedSize) in Fl_Text_Buffer.
See fltk.general "Fl_Text_Buffer constructor bug" on Dec 5, 2016.
- Fix build with configure --enable-cairo --enable-cairoext,
see this report in fltk.general:
https://groups.google.com/forum/#!topic/fltkgeneral/x80qQ6wt0s4

2
src/Fl_Text_Buffer.cxx
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@ -108,7 +108,7 @@ Fl_Text_Buffer::Fl_Text_Buffer(int requestedSize, int preferredGapSize)
mPreferredGapSize = preferredGapSize;
mBuf = (char *) malloc(requestedSize + mPreferredGapSize);
mGapStart = 0;
mGapEnd = mPreferredGapSize;
mGapEnd = requestedSize + mPreferredGapSize;
mTabDist = 8;
mPrimary.mSelected = 0;
mPrimary.mStart = mPrimary.mEnd = 0;