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lang/seed7: update to 05_20210322
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lang/seed7: update to 05_20210322

Changes:

20210322:

Some missleading tests have been removed from chkflt.sd7. Many thanks go to Zachary Menzies for pointing out problems with the tests for trunc() and round().
The new library gif.s7i has been added. This library supports the GIF image file format.
The new library bmp.s7i has been added. This library supports the BMP image file format. The functions readBmp() and str(BMP) have been moved from draw.s7i to the new library bmp.s7i. The performance and functionality of readBmp() has been improved. The deprecated function read_bmp() has been removed (the function readBmp() can be used instead).
In bitdata.s7i the performance of getBitsLsb() and getBitsMsb() has been improved.
The functions peekBitsLsb(), skipBitsLsb(), peekBitsMsb() and skipBitsMsb() have been added to bitdata.s7i.
The functions lzwCompressLsb(), lzwDecompressLsb(), lzwCompressMsb(), lzwDecompressMsb(), lzwCompressMsbEarlyChange() and lzwDecompressMsbEarlyChange() have been added to lzw.s7i. The functions lzwEncodeMsb() and lzwDecodeMsb() have been deprecated (use lzwCompressMsbEarlyChange() respectively lzwDecompressMsbEarlyChange() instead).
Tests for INDEX_ERROR have been added to chkarr.sd7.
Tests for peekBitsLsb() and peekBitsMsb() have been added to chkbitdata.sd7.
Tests for << (shift left) have been added to chkint.sd7.
Tests for string concatenations where the second parameter is a string of length 1 (created by str(aChar)) have been added to chkstr.sd7.
The function getStriUpToChar() has been added to bytedata.s7i.
The experimental function seekable() has been added to file.s7i, null_file.s7i, clib_file.s7i, external_file.s7i, strifile.s7i, subfile.s7i, utf16.s7i, iobuffer.s7i, gzip.s7i, lzma.s7i, xz.s7i and zstd.s7i.
Several optimizations have been done in the compiler (s7c.sd7):
- In comp/arr_act.s7i the index check for the action ARR_IDX has been improved.
- In comp/int_act.s7i the overflow check for the actions INT_ADD_ASSIGN and INT_SBTR_ASSIGN has been improved.
- In comp/intrange.s7i the function getIntRange() has been improved to get a range for the action INT_LSHIFT and to get a better range for the action INT_MOD.
- In comp/str_act.s7i the function optimize_str_cat has been improved to generate a call of strConcatChar() or strConcatCharTemp(), if applicable.
- In comp/chr_act.s7i the generation of the macro chrStrMacro() has been improved to avoid #line directives in macro parameters.
In drw_win.c the performance of the function drwImage() has been improved. Instead of calling SetPixel() for every pixel it now does one call of CreateBitmap().
In runerr.c in the function write_curr_position() the check for the current action object has been improved.
The functions strConcatChar() and strConcatCharTemp() have been added str_rtl.c.
The function filSeekable() has been added to fil_rtl.c.
The function determineLseekFunction() has been added to chkccomp.c.

20210223:

Spelling corrections have been done in several files. Many thanks go to Jens Schleusener, for sending a source code misspelling report from Fossies.
The new library png.s7i has been added. This library supports the PNG image file format.
Seed7 has been improved to compile under Android with termux. This is described in src/read_me.txt.
A chapter about Unicode characters has been added to the manual.
The make7.sd7 example program has been improved. The processing of makefiles in make.s7i has been improved to process every rule just once. The handling of the option -n (don't execute commands) has been improved to work in the same way as in other make tools.
The test program chkbin.sd7 has been improved to to allow two possible NaN values as result of 0.0 / 0.0.
The test program chkflt.sd7 has been improved to allow that for some test cases trunc() and round() either return the correct value (integer.last) or raise RANGE_ERROR.
Tests for array bitset have been added to chkarr.sd7.
Tests for conversion and cardinality have been added to chkset.sd7.
The functions XChangeProperty() and XMapWindow() have been added to fwd_x11.c and x11_x.h.
The makefile mk_clang.mak has been improved to allow the replacement of system headers (x11_x.h and fwd_term.h). This way compilation works also without the original headers.
The warning box created by warn.c had too much width to be readable in termux. So this width has been reduced.
In drw_win.c the functions drwXPos() and drwYPos() have been fixed to return coordinates relative to the parent window.
The checks for the C compiler option -ftrapv in chkccomp.c have been improved. Now it is recognized, if integer overflow raises the signal SIGTRAP. Clang at the ARM processor uses SIGTRAP.
Changes have been done in sigutl.c to handle SIGTRAP and to raise OVERFLOW_ERROR in the signal handler (if chkccomp.c has recognized that an integer overflow raises SIGTRAP).
Changes have been done in chkccomp.c to support PostgreSQL version
1. Additionally the logic to search for PostgreSQL dlls has been improved. Now it searches also for the libraries libcrypto and libssl. Now POSTGRESQL_DLL can be specified, with an absolute path of libpq.dll, in the makefile (which should echo it to chkccomp.h).
In the compiler (s7c.sd7) the handling of actual parameters for formal inout parameters has been improved. Now a struct element can be used as actual parameter for a formal inout parameter.
The compiler has been improved to reduce range checks for the expressions char(number), chr(number) and card(bitset(number)).
Interpreter and compiler have been improved to support the action REF_ISTEMP. The function isTemp() has been added to progs.s7i.
In comp/intrange.s7i the function getIntRange() has been improved to determine result ranges for INT_ADD and integer constants.
The compiler has been improved to assure that sigsetjmp() is not called with a value other than 0 or 1 for the second parameter (savesigs). According to the specification of sigsetjmp() all integer values are allowed for the second parameter (savesigs) and a non-zero value triggers a save of the current signal mask. ARM / Android / termux decided that just 0 and 1 are valid values and that any other value triggers a termination of the program (with SIGABRT).
The function drwCapture() in drw_win.c has been improved to work correct, if the screen has been scaled.
In drw_win.c the functions drwPut() and drwSetTransparentColor() have been improved such that images with a transparent color work.
The runtime of drwRgbColor() in drw_x11.c has been reduced by 31% (measured with gcc and valgrind, when reading a PNG image). This takes effect if a true color display is used.
The runtime of drwRtlImage in drw_rtl.c has been reduced by 63% (measured with gcc and valgrind, when reading a PNG image). The function memcpy_pixel() uses loop unrolling inspired by Duff's device.
The program chkccomp.c has been improved to determing the macro rgbToPixel() (if X11 graphics is used).
In exec.c the function exec_expr() has been improved to clear the TEMP flag for all results.
The makefiles have been improved to write the name of the make utility and the name of the makefile to version.h.

20210130:

The parser (used by interpreter and compiler to read a program) has been improved to work correct, if seed7_05.s7i is not included. Many thanks go to Domingo Alvarez Duarte for pointing out that a missing seed7_05.s7i include statement causes a parser error.
The example program mirror.sd7 has been added. This program mirrors a rectangular screen area in a window.
The function capturePixmap has been added to graph.s7i. This function can be used to capture rectangular areas from the screen.
In the library graph.s7i the function openSubWindow() has been improved to allow top level windows without window decorations. This can be done by using the empty window as parent window.
Chapters about pragmas and compilation errors have been added to the manual.
The parser has been improved to work reliable in out of memory situations. Now the fatal parser error "Out of heap space" does not terminate the program.
The minor versions of interpreter and compiler have been increased. Now interpreter and compiler share the same revision level. Every compilation of the Seed7 interpreter increases the revision level.
A definition of VERSION_REVISION_LEVEL has been added to cc_conf.s7i. This is used in confval.sd7 and s7c.sd7.
Interpreter and compiler have been improved to support the new action DRW_CAPTURE.
In analyze.c the function analyzeProg() has been improved to catch the "Out of heap space" error and to clean up memory in out of memory situations. Now the old values of the global variables prog, interpreter_exception curr_exec_object, curr_argument_list and trace are restored, when the function is left.
In analyze.c the functions analyzeFile() and analyzeString() have been improved to work without setting interpreter_exception. Now these functions work the same in interpreted and compiled programs.
In atom.c the function read_atom() has been improved to keep the data structure consistent in out of memory situations.
The functions pop_owner() and close_current_stack() have been added to name.c.
In name.c the functions free_params(), get_object() and push_name() have been improved to have an additional 'currentProg' parameter.
In name.c the function get_object() has been improved to reverse its changes in case of an error.
In name.c the handling of errors has been improved in push_name(), eval_name_list(), inst_list(), inst_object_expr(), find_name(), search_name(), dollar_parameter() and dollar_inst_list(). In error situations changes are reversed, memory is freed and stack growing and shrinking is now done in a consistent way.
In entutl.c the function copy_params() has been improved to allocate the parameters first in a list and to assign them later.
The new functions pop_name_list() and get_entity_node() have been added to entutl.c.
In entutl.c the function get_entity() has been improved to handle error situations (out of memory).
In entutl.c in the function init_entity() dereferencing NULL is avoided now, if the memory allocation fails.
In blnlib.c the function bln_ternary() has been improved to work correct, if evaluate() returns NULL. This happens if an exception is triggered inside evaluate().
Implementations of drwBorder() and drwSetPos() have been added to drw_emc.c. The functions drwXPos() and drwYPos() have been improved.
The function drwCapture() has been added to drw_x11.c and drw_win.c.
The function drwOpenSubWindow() has been improved in drw_x11.c and drw_win.c to support the creation of unmanaged top level windows without window decorations (if the parent window is empty).
The function omitWindowDecorationsAndTaskbarEntry() has been added to drw_x11.c.
In flt_rtl.c the function setMantissaAndExponent has been improved to work without division by DOUBLE_MANTISSA_FACTOR.
The program chkccomp.c has been improved to write an error message, if executing a test program fails.
In error.c the functions read_ustri8_line(), read_and_print_line() and ustri8_buffer_to_stri() have been improved to work reliable in out of memory situations.
In fatal.c the function no_memory() has been improved to do a long jump to analyzeProg().
In listutl.c the function append_element_to_list() has been improved to keep the list_insert_place unchanged in out of memory situations.
In sctlib.c in the function sct_cat() the code to handle an error has been improved, to avoid using a pointer that might be invalid because of a previous realloc(). The function sct_elem() has been improved to consider that grow_stack() might fail.
In typeutl.c the function get_varfunc_type() has been improved to work correct, if new_type() returns NULL. This can happen in out of memory situations.
In findid.c the functions clean_idents() and write_idents() have been refactored to use a progType parameter and to allow NULL values in the ident tables.
In flistutl.c the function heap_chunk() has been improved to never do a realloc() on a memory chunk and to explain why this is done.
In flistutl.h the macros HEAP_OBJ(), HEAP_L_E(), HEAP_NODE() and HEAP_FILE() have been fixed to return FALSE in out of memory situations.
In hshlib.c the macro isit_not_null() has been added to several functions to assert that function references and compare results are not NULL.
In prclib.c the functions prc_begin(), prc_local(), prc_res_begin(), prc_res_local(), prc_return(), prc_return2(), prc_varfunc() and prc_varfunc2() have been improved to handle error situations (out of memory).
In prclib.c the macro isit_not_null() has been added to prc_case(), prc_case_def(), prc_case_hashset() and prc_case_hashset_def(). This macro checks that the sets after the keyword 'when' are not NULL.
In identutl.c the function init_idents() has been changed to leave a failed initialisation as is (this is cleaned up later).
In prg_comp.c the function prgDestr() has been improved to allow NULL for elements of the program structure. The function interpret() has been improved to restore the global variable interpreter_exception.
In exec.c the functions getErrInfoFromFailValue() and do_exec_call() have been added. The function exec_expr() has been improved to restore the global variable interpreter_exception.
In executl.c the functions do_destroy(), create_return_object(), create_local_object(), destroy_local_object() and destroy_local_init_value() have been improved to handle error situations (out of memory).
In match.c the function match_subexpr() has been improved to handle out of memory situations.
In runerr.c the functions write_position_info() and write_call_stack_element() have been improved to recognize valid data better.
In runerr.c the functions run_error(), empty_value() and var_required() have been improved to write the error message only, if exception tracing is switched on. Now these functions raise ACTION_ERROR instead of RANGE_ERROR.
The function freeOptions() has been added to s7.c. The function raise_error2() has been improved to handle an out of memory situation.
In symbol.c the function close_symbol() has been improved to allow NULL for symbol.name and symbol.striValue.
In syvarutl.c the function init_sysvar() has been improved to define a dummy value for SYS_EXPR_TYPE (EXPR_TYPE). This avoids an error, if the source has no include directive.
The function printLocObj() has been added to traceutl.c. The functions prot_list_limited() and trace1() have been improved to recognize corrupt category fields.
In cmd_rtl.c code has been moved from cmdReadlink(), cmdFileTypeSL() and cmdGetcwd() to the new functions doReadLink(), getFileTypeSL() and doGetCwd() respectively. The new functions use err_info to report errors instead of raising an exception. The old functions have been refactored to call the new functions.
In cmd_rtl.c the function followLink() has been refactored to call getFileTypeSL() and doReadLink().
The program levelup.c has been added. This program is called by the makefile to increase the revision level of interpreter and compiler.
In comp/expr_utl.s7i the function prepare_win_result() has been fixed to use drwDestr() instead of winDestr().
The system declaration for "type" hase been removed from syntax.s7i.
The makefiles have been adjusted to increase the revision level (stored in level.h) before the interpreter is compiled. This way interpreter and compiler get the same revision level.
Documentation comments have been improved in array.s7i, graph.s7i, leb128.s7i, analyze.c, cmd_rtl.c, drw_emc.c, drw_win.c, drw_x11.c, entutl.c, error.c and exec.c.