lang/seed7: update to 05_20221218

20221218:

• Examples for reading from the keyboard have been added to the manual.
• In src/read_me.txt and src/read_me.htm the description "compiling Seed7 under windows with cl from MSVC" has been improved. The description of possible C compiler warnings has also been improved.
• Support for the ternary operator ?: has been added to the types bitset, color, duration and time.
• The graphic keyboard test program gkbd.sd7 has been improved to support super/windows keys.
• Definitions of KEY_SUPER, KEY_LEFT_SUPER and KEY_RIGHT_SUPER have been added to the libraries keybd.s7i and keydescr.s7i.
• The tls.s7i library has been improved to reopen a socket if the old session cannot be reused.
• In gif.s7i a small error in reading a GIF header has been fixed.
• The compiler (s7c.sd7) has been improved:
  • Unsupported Seed7 compiler options trigger a warning now.
  • Better optimizations for abs(), mdiv and mod are done.
  • More integer overflow checks of abs(), <<, *, div, mdiv, mod and rem are optimized away (with option -oc3).
  • More division by zero checks are optimized away.
  • Computing the range of possible integer results for abs(), bitLength(), log2(), log10(), sqrt() +, -, <<, >>, - (negate), * and ?: (ternary operator) has been improved. This also helps in reducing the number of integer overflow checks.
  • The statistics about integer overflow checks and division checks have been improved.
  • A warning is written at a catch of otherwise when checks for an exception have been suppressed (this is done with -w2).
• The code coverage of the integer tests in chkint.sd7 and chkovf.sd7 has been increased. Now, all code in comp/int_act.s7i is tested (except code for non-twos-complement computers).
• Several tests in chkint.sd7 have been refactored to avoid optimizations that skip tests (Expressions are compared with intExpr(value) instead of just value).
• Documentation comments have been improved in time.s7i.
• The graphic driver for windows (drw_win.c) has been improved:
  • Windows are now created with a size that includes decorations.
  • The windows class is registered with with RegisterClassExW() now. This triggers the creation of Unicode windows (where keypresses return Unicode characters).
  • A function to draw filled chords (drwPFArcChord) under windows has been added.
  • An empty window is just created once on initialization and stored globally.
• The graphic keyboard driver for windows (gkb_win.c) has been improved:
  • The function getc(GRAPH_KEYBOARD) now returns Unicode characters.
  • Dead keys are returned directly and are not combined with the next character pressed (this combining can be done by the program).
  • Holding down a windows/super key and pressing a cursor key is supported now (this resizes and moves the current active window). In this case the program now receives KEY_RESIZE characters (if they have been requested with selectInput()).
  • Combinations of CTRL + ALT + letter are now recognized correctly (CTRL is preferred over ALT in combinations with a letter).
  • The combination of cursor, function and mouse keys with modifier keys now prefers SHIFT over the other modifiers and CTRL over ALT.
  • The recognition of button presses in gkbButtonPressed() has been improved to also work for Unicode characters.
  • Now wide char functions (CreateWindowW(), CreateWindowExW(), MapVirtualKeyW(), PeekMessageW(), GetMessageW()) are used and only correctly received messages are processed.
  • The lowest four bits of a system command (wParam of WM_SYSCOMMAND message) are ignored now.
  • Macros are used to recognize mouse wheel and xbuttons.
  • Macro definitions have been added, as some C compilers do not provide them.
• The graphic keyboard drivers (gkb_win.c and gkb_x11.c) have been improved to support super/windows keys.
• The support for the unused action CHR_CONV has been removed.
• The number of C compiler warnings has been reduced.
• Unnecessary initialisations and assignments have been removed in several C files.
• Usages of strcpy() and wcscpy() have been reduced.
• In hshlib.c the hash table for-loops have been adjusted to process the elements in the same succession as in compiled programs. The code has also been simplified.
• The program chkccomp.c has been improved:
  • Now, a backup copy of the source file (e.g. ctest123.cbak) is created if a test program fails.
  • Now, an empty output of a test program is recognized and the test is repeated (Some anti-virus software of Windows may trigger this).
  • Now, it considers wasm files for an Emscripten build.
  • The macros os_setmode, os_fdopen and os_fileno are determined.
• Usages of isatty(), fdopen() and fileno() have been replaced by os_isatty(), os_fdopen() and os_fileno() respectively.
• Some fixes for Emscripten have been done:
  • The files mk_emccl.mak and mk_emccw.mak have been adjusted for the newest version of Emscripten. Now, there is source information in a stack trace, and the stack size used by Emscipten has been increased.
  • In chkccomp.c wasm files are considered now.
  • The size of functions has been reduced in chkchr.sd7, chkint.sd7 and chkstr.sd7. This avoids a stack overflow in Node.js.
• Logging functions have been added or improved in drw_win.c, gkb_win.c, gkb_x11.c and intlib.c.