Seed7 Release 2020-04-05

Hello,


I have released a new version of Seed7: seed7_05_20200405.tgz
The download is here: https://sourceforge.net/projects/seed7/files
In the Seed7 programming language new statements and operators can
be declared easily. Types are first class objects and therefore
templates/generics need no special syntax. Object orientation is used
when it brings advantages and not in places when other solutions are
more obvious.


Seed7 is covered by the GPL (and LGPL for the Seed7 runtime library).


Changelog:
- The new library xz.s7i has been added. This library supports XZ
    compressed files.
- The new library lzma.s7i has been added. This library supports LZMA
    compressed files.
- The library rpm.s7i has been improved to support an XZ compressed
    payload.
- The library tar_cmds.s7i and the program tar7.s7i have been improved
    to support XZ and LZMA compressed tar archives.
- The library zip.s7i has been improved to support Unicode file names.
- As suggested by Zachary Menzies a detection of modifier keys has been
    added. E.g. buttonPressed(KEYBOARD, KEY_SHIFT). Additionally several
    new key combinations such as KEY_SFT_MOUSE1 and KEY_CTL_PAD_CENTER
    have been added to keybd.s7i.
- The program gkbd.sd7 has been improved to show the new capabilies of
    the keybord interface.
- Interpreter and compiler have been improved, to write a compile time
    error, if a numerical escape sequence in a string or char literal
    is too big.
- The compiler has been improved to omit overflow checks for the
    dividend of the mod operator, if the divisor is a power of two. This
    reduces the runtime of the xz (lzma2) decompression by 2.3% (measured
    with gcc and valgrind, when decompressing a binary Seed7 package).
- The compiler file comp/intrange.s7i has been added. This file defines
    the function getIntRange(), which computes the range of possible
    results for several operators (e.g.: div, rem, mdiv, mod, >>) and
    functions (e.g.: sqrt, length, pos, rand, log).
- The compiler has been improved to use the function getIntRange() to
    omit overflow checks for addition, subtraction, multiplication and
    left shift of integer values. This reduces the runtime of the xz
    (lzma2) decompression by 0.4% (measured with gcc and valgrind, when
    decompressing a binary Seed7 package).
- In the compiler the code generation for the operators div, rem, mdiv,
    mod, * and << has been improved to work without catching the
    exception OVERFLOW_ERROR.
- The compiler has been improved to do a range check for the action
    FLT_BITS2SINGLE (convert integer to single precision float value).
- The compiler has been improved to generate code that writes the error
    message of a DATABASE_ERROR, if the exception is uncatched.
- The compiler has been improved to suppress the usage of the C
    compiler option CC_OPT_TRAP_OVERFLOW (-ftrapv), if the Seed7 compiler
    option -so (suppress overflow checks) is used.
- The makefiles mk_clang.mak, mk_clangw.mak and mk_osxcl.mak have been
    improved to define CC_OPT_TRAP_OVERFLOW with the value -ftrapv.
- The functions check_mod_by_power_of_two_optimization() and
    check_mod_by_computed_power_of_two_optimization() have been added
    to chkint.sd7. This functions check the mod operator regarding
    the new compiler optimization for the mod dividend.
- The functions check_reduced_overflow_checking_for_sums(),
    check_reduced_overflow_checking_for_mult() and
    check_reduced_overflow_checking_for_lshift() have been added to
    chkint.sd7 and chkovf.sd7. This functions test the compiler
    optimization to reduce overflow checking with getIntRange().
- The libraries aes.s7i, bitdata.s7i, color.s7i, deflate.s7i, draw.s7i,
    ico.s7i, msgdigest.s7i, pkcs1.s7i, showtls.s7i and utf16.s7i have
    been improved to use the division operators 'mdiv' and 'mod' instead
    of 'div' and 'rem'.
- The configuration value CC_OPT_TRAP_OVERFLOW has been introduced in
    cc_conf.s7i, confval.sd7, s7c.sd7, chkccomp.c, cmd_rtl.c and
    read_me.txt.
- The function write_exception_info() has been added to runerr.c. This
    function is called in executl.c.
- The keyboard drivers gkb_win.c and gkb_x11.c have been improved to
    support modifier keys and more key combinations.
- Definitions for 31 new key compinations and 9 modifier keys have
    been added to keybd.s7i and keydescr.s7i.
- Documentation comments have been improved in ar.s7i, cc_conf.s7i
    and csv.s7i.


Regards,
Thomas Mertes


--
Seed7 Homepage: http://seed7.sourceforge.net
Seed7 - The extensible programming language: User defined statements
and operators, abstract data types, templates without special
syntax, OO with interfaces and multiple dispatch, statically typed,
interpreted or compiled, portable, runs under linux/unix/windows.

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