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OSF-AXP CXXSHRDAE01307 DEC C++ Class Library Run-Time V3.0 ECO Summary

Copyright (c) Digital Equipment Corporation 1995. All rights reserved. PRODUCT: DEC OSF/1 Version 3.0, 3.2, 3.2C COMPONENT: DEC C++ Class Library Run-Time Version 3.0 SOURCE: Digital Equipment Corporation ECO INFORMATION: ECO Kit Name: CXXSHRDAE01307 ECO Kits Superseded by This ECO Kit: CXXSHRDAE01306 ECO Kit Approximate Size: cxxshrdae01307.tar 399360 Bytes ECO KIT SUMMARY: An ECO kit exists for DEC C++ Class Library Run-Time V3.0 on DEC OSF/1 V3.0,3.2,3.2C. This kit addresses the following problems: o When the Complex Library exp() function detects an underflow error, the resulting value is now (0,0) instead of (+/- max-float, +/- max-float). o The division routines within the Complex Library now catch divide-by-zero errors instead of signaling them. o There is no longer a memory leak when you use the *_withassign assignment operators to initialize an object for which you have called xalloc(). Previously, the memory allocated for the object by xalloc() was lost. o The String extraction operator now takes care of dynamically allocating the String to accommodate the input. o When you open a file specifying ios::ate but not ios::app to the filebuf open() function, the file is no longer opened in O_APPEND mode. This incorrect behavior caused all data to be written to the end of the file, regardless of the current file position. o Various problems with exception handling have been fixed. Also, support for exception handling in DEC C++ V5.3 has been added. o The catch(...) clause now catches C structured exceptions. o The fstream, ifstream, and ofstream close() member functions now clear the stream's error status when the close succeeds. Known restrictions in CXXSHRDAE01307 kit o A single application is restricted from using both the math library function clog() and the iostream Package's clog object. This restriction is due to the fact that libm and libcxx each contain a definition for the global symbol clog and those definitions are incompatible. Furthermore, applications which reference one of the clog symbols cannot include both -lcxx and -lm on their ld command line. ld will generate an error because clog is multiply defined. Problems addressed in previous CXXSHRDAE01306 kit o The >> operator within the istrstream class now works correctly when converting from a character string to a float. o An access violation or segmentation fault is no longer generated when your application writes into an uninitialized ostream_withassign. Instead the written text is simply ignored. o A file positioning problem for bidirectional fstreams has been corrected. Previously if your application switched from reading an fstream to writing an fstream, with or without an intervening seek operation, the necessary synchronization of the external file position with the get pointer was often skipped. This resulted in the written data being placed incorrectly within the file. o The real() function within the stopwatch class was incorrectly returning the CPU time. Now it returns the clock time as documented. o The flush() function within the ostream class was incorrectly calling overflow(). Now flush() calls sync() as documented. o During the destruction of a Message object, the value of the LANG environment variable is no longer cleared. o Instances of ostrstream no longer delete their strstreambuf twice. This had no effect on the standard memory allocators, but it did cause problems for some third party memory allocators. o The segmentation fault in sync_with_stdio() no longer occurs. The segmentation fault was due to the conflict between the clog function within the math library and the clog object within the iostream Package. o The strstreambuf destructor no longer deletes the buffer if str() has been called. As documented, the str() function now transfers the responsibility of freeing the buffer to the caller. o The >> operator within the istrstream class now works correctly when the conversion base format is hex and hexadecimal values are read which begin with "0" but are not prefixed with "0x". o A segmentation fault no longer occurs during image exit for applications which called sync_with_stdio(). Previously, the call to sync_with_stdio() would free memory which was again freed at image exit; this sometimes generated a segmentation fault. o The algorithm used by ostrstream for dynamic allocation has been corrected. The previous algorithm doubled the buffer size each time additional space was needed, and this resulted in very inefficient use of memory for large buffers. INSTALLATION NOTES: This DEC C++ Class Library kit may be installed on DEC OSF/1 Version 3.0, 3.2, and 3.2C. The tar file, CXXSHRDAE01307.tar, must be unpacked before using the setld utility to install the kit. When you unpack the tar file, you will find the release notes in a separate file, CXXSHRDAE01307.RELEASE_NOTES. After unpacking the tar file, install this kit with the setld utility by logging into the root account and typing the following: /usr/sbin/setld -l [location of the unpacked files]



This patch can be found at any of these sites:

Colorado Site
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Files on this server are as follows:

cxxshrdae01307.README
cxxshrdae01307.CHKSUM
cxxshrdae01307.CVRLET_TXT
cxxshrdae01307.tar
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