new *z*printf-posix modules

[Bruno Haible]

This set of patches adds -posix variants for the *z*printf-posix modules
that we have so far, along with small unit tests.


2024-06-24  Bruno Haible  <bruno@clisp.org>

        obstack-zprintf-posix: Add tests.
        * tests/test-obstack-zprintf-posix.c: New file, based on
        tests/test-vazsprintf-posix.c.
        * modules/obstack-zprintf-posix-tests: New file.

        obstack-zprintf-posix: New module.
        * modules/obstack-zprintf-posix: New file.

2024-06-24  Bruno Haible  <bruno@clisp.org>

        vazsprintf-posix: Add tests.
        * tests/test-vazsprintf-posix.c: New file, based on
        tests/test-zsnprintf-posix.h.
        * modules/vazsprintf-posix-tests: New file.

        vazsprintf-posix: New module.
        * modules/vazsprintf-posix: New file.

2024-06-24  Bruno Haible  <bruno@clisp.org>

        zsprintf-posix: Add tests.
        * tests/test-zsprintf-posix.c: New file.
        * modules/zsprintf-posix-tests: New file.

        zsprintf-posix: New module.
        * modules/zsprintf-posix: New file.

2024-06-24  Bruno Haible  <bruno@clisp.org>

        vzsprintf-posix: Add tests.
        * tests/test-vzsprintf-posix.c: New file.
        * tests/test-zsprintf-posix.h: New file, based on
        tests/test-zsnprintf-posix.h.
        * modules/vzsprintf-posix-tests: New file.

        vzsprintf-posix: New module.
        * modules/vzsprintf-posix: New file.

2024-06-24  Bruno Haible  <bruno@clisp.org>

        zsnprintf-posix: Add tests.
        * tests/test-zsnprintf-posix.c: New file.
        * modules/zsnprintf-posix-tests: New file.

        zsnprintf-posix: New module.
        * modules/zsnprintf-posix: New file.

2024-06-24  Bruno Haible  <bruno@clisp.org>

        vzsnprintf-posix: Add tests.
        * tests/test-vzsnprintf-posix.c: New file.
        * tests/test-zsnprintf-posix.h: New file, based on
        tests/test-snprintf-posix.h.
        * modules/vzsnprintf-posix-tests: New file.

        vzsnprintf-posix: New module.
        * modules/vzsnprintf-posix: New file.

0001-vzsnprintf-posix-New-module.patch
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0002-vzsnprintf-posix-Add-tests.patch
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0003-zsnprintf-posix-New-module.patch
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0004-zsnprintf-posix-Add-tests.patch
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0005-vzsprintf-posix-New-module.patch
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0006-vzsprintf-posix-Add-tests.patch
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0007-zsprintf-posix-New-module.patch
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0008-zsprintf-posix-Add-tests.patch
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0009-vazsprintf-posix-New-module.patch
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0010-vazsprintf-posix-Add-tests.patch
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0011-obstack-zprintf-posix-New-module.patch
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0012-obstack-zprintf-posix-Add-tests.patch
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