nsf

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* nsf.c (NsfCurrentCmd): Avoid (possible, but unlikely) null dereferencing, if CSC was missing [CID 294166].

* nsf.c (NsfDebugGetDict): Compute the remaining size to snprintf for each iteration [CID 294169]. [skip ci]

address CID 294171 and change construct for strpbrk

Merge branch 'master' of ssh://alice.wu.ac.at/usr/local/src/git-repo/nsf

nsf.c (NsfDebugGetDict): Parametrize length computation; remove unneeded nul-termination. [skip ci]

minor cleanup

reduce variable scope and minor cleanup

* nsf.c (NsfDebugGetDict): Make use of strncat more robust by setting the destingation length to the remainder of the output buffer.

* nsf.c (ForwardArg): Provide a const'ed pointer to strpbrk, as required [CID 294162].

* nsf.c (ParamDefsFormat): Fix overrun in memcpy by correcting the destination-length argument [CID 294165].

* nsf.c: Fix all "-pedantic -ansi" errors.

* nsf.c (ParamDefsStore, NsfProcDeleteProc): Provide for counting a reference to the execNsPtr from the NsfProcContext structure. While I could not devise a script-level path to pull out the rug (execNsPtr) out from under NsfProcContext clients, I can only also not exclude the latter (from future C-level paths?). Better act defensively.

* nsfInt.h (STRING_NEW): Silence GCC 8.1 warnings on truncation risk using strncpy; made me wonder whether STRING_NEW would not be more robust against mis-computations of the destination-buffer length by using snprintf (mainly because snprintf does not nul-pad the destination buffer and always nul-terminates the destination buffer)?

* parameters.test: Adding two test cases to cover previously missed code branches leading to leaking NsfMethodNamePath uses.

* nsf.c (ArgumentParse): Handle NsfMethodNamePath result correctly.

* nsf.c (NsfSetterMethod): Handle NsfMethodNamePath result correctly.

* nsf.c (ObjectCmdMethodDispatch): Close another Tcl_Obj leak incurred by not handling the result from NsfMethodNamePath.

* nsf.c (FindNextMethod): Plumb another memleak (valgrind). The Tcl_Obj computed by NsfMethodNamePath must be refcount corrected.

* nsf.c (AliasGet): Plumbing a memleak found by valgrind. The computed Tcl_Obj from AliasIndex must be refcount-managed explicitly, otherwise the path via AliasGet leaks it.

Fix makefile.vc syntax [skip travis]

Re-code env variable dimension of build matrix

Fix appveyor.yml syntax

Necessary additions to build script and NMAKE/TEA artifacts

appveyor.yml: Add TOOLCHAIN dimension to incorporate MSVC builds

per-object-mixins.tcl: Fix an example script that got broken a long, long time ago. [skip ci]

Fix build.tcl pt. 2 [skip ci]

Fix build.tcl [skip ci]

Add nmake mode to build.tcl [skip ci]

Add allowed failures to Travis setup [skip appveyor]

Set allowed failures on Tcl development branches; report failure on first failing build [skip travis]