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NEWS for version 2.3.x -*-text-*- 24 bit color support (new for version 2.3.1) ============================================ The SLtt interface has been modified to support 24 bit (true) colors. Until the next major release (version 3), this feature is available for 64 bit Unix/VMS systems to keep binary compatibility. Support for 32 bit systems will be added in version 3. Since not all terminals support true color, and it is not supported by terminfo, 24 bit color is disabled by default. A list of terminals that support true color may be found at <https://gist.github.com/XVilka/8346728>. To indicate that a terminal supports true color, set the value of the environment variable COLORTERM to either "24bit" or "truecolor", e.g., export COLORTERM=truecolor Then to use 24 bit color in applications such as jed and slrn, use a 24bit RGB value in the form "#RRGGBB" as the name of the color. For example, to set the color of the status line in jed to AliceBlue (#F0F8FF) on a SlateGray (#708090) background, use set_color ("status", "#F0F8FF", "#708090"); in the .jedrc file. In slrn, to set the color of the author name to the above colors use color author "#F0F8FF" "#708090" in the .slrnrc file. Also note other character attributes may be specified, e.g., "#F0F8FF;italics;underline". New Modules =========== 1. base64: A base64 encoder/decoder module 2. chksum: A module for computing various checksums (currently md5 and sha1) 3. stats: A statistics module 4. histogram: A histogram module 5. json: Encode/decode json structures Module Updates ============== stats-module: Added Anderson-Darling normality and k-sample tests (version 2.3.1) Intrinsic Functions =================== The following intrinsic functions have been added for 2.3.x: sincos : returns both sin and cos in one function call get/setitimer: get/set an interval timer wherefirstmin/max, wherelastmin/max: returns index for first/last min/max values of an array wherefirst_eq/ne/gt/lt/ge/le, where_last_eq/ne/gt/lt/ge/le: returns first/last index of an array where the array value is eq/ne/gt/lt/ge/le of a specified value. (version 2.3.1) wherediff: returns indices where adjacient elements of an array differ. bstrjoin, bstrcat: like strjoin/strcat but for binary strings. get_environ: returns an array of currently defined environment variables. getrusage: Get resource usage lchown: Change ownership of a symbolic link get/set_printable_bstring_size: Get/set the length of the printable representation of binary strings. (version 2.3.1) statvfs: Intrinsic that wraps statvfs POSIX function that returns file system statistics. (version 2.3.1) _ftime: returns the number of (wallclock) seconds since an epoch (version 2.3.1) wchars_to_string/string_to_wchars: Convert a UTF-8 encoded string to and from an array of Unicode characters. (version 2.3.1) _array_byteswap: used to convert the values of an array from one endianness to another (version 2.3.2) The following functions have been enhanced: array_map modified to support multiple return values. is_substrbytes: Added support for an optional offset into the string. _push_struct_field_values: An optional argument may be used to specify the fields to be pushed. (version 2.3.1) Interpreter Syntax ================== The step parameter was made optional for the _for statement. Struct field names may be an arbitrary string: X = struct {"some-field", some_other_field }; X.some_other_field = 3; X."some-field" = 4; String literals now support \uABCD to specify a 32 bit unicode character. Previously, the braces were required (\u{ABCD}). (version 2.3.1) A reserved word may be used for a struct field name without quoting it (version 2.3.2) slsh library (used by conforming slang apps such as jed, slrn, ...) =================================================================== fswalk.sl: Functions that facilitate walking the filesystem. listfuns.sl: Set of functions dealing with lists and list-based structures (e.g., heaps). rearrange: Performs an in-place arrangement of values in an array or list (defined in arrayfuns.sl). slsh ==== Using "who" at the slsh> prompt will list the names/values of variables and functions defined at the prompt. API News ======== Note: The slang 2.3.x API is backward binary compatible with slang 2.y.z. Font attributes (italics, bold, underline, ...) may be enabled for terminals that support them by using a color name with a qualifier: SLtt_set_color ("menu", "white;italics", "blue"); SLtt_set_color ("comment", "black;underline;italics", "cyan"); SLang_init_tty: if flow control parameter is negative, the terminal's flow control setting will not be changed. New functions: Functions for dealing with qualifiers passed to intrinsic functions: SLang_qualifier_exists; SLang_get_int_qualifier; SLang_get_long_qualifier; SLang_get_double_qualifier; SLang_get_string_qualifier; Callback functions that allow an app additional hooks into the slang readline functions: SLrline_set_free_update_cb; SLrline_set_update_clear_cb; SLrline_set_update_preread_cb; SLrline_set_update_postread_cb; SLrline_set_update_width_cb; SLrline_get_update_client_data; Functions for dealing with interpreter associative arrays: SLang_create_assoc; SLang_push_assoc; SLang_pop_assoc; SLang_free_assoc; SLang_assoc_put; SLang_assoc_get; SLang_assoc_key_exists; Functions for dealing with interpreter list objects: SLang_create_list; SLang_list_append; SLang_list_insert; SLang_push_list; SLang_pop_list; SLang_free_list; Functions for dealing with interpreter structures: SLang_create_struct; SLang_push_struct_field; SLang_pop_struct_field; SLang_pop_struct_fields; Miscellaneous Functions: SLstack_exch; SLcompute_string_hash; SLpath_getcwd; Unicode Support =============== Unicode tables were updated to version 10.0.0 (version 2.3.2) Miscellaneous ============= Support was added to support 32-bit terminfo database entries introduced by ncurses 6.1 (version 2.3.2) =x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x= NEWS for version 2.2.x -*-text-*- Interpreter Enhancements ======================== 1. The ternary expression was added: expression = condition ? val1 : val2 If condition is non-zero, then expression = val1, otherwise expression = val2 2. The break and condition statements support an optional integer that indicates how many loop levels the statement affects, e.g., the break statement in while (1) { loop (10) { break 2; } } will cause both loops to be terminated. 3. Multiline strings have been added: "This is a \ multiline \ string" `This is another multiline string that does not require a \ for continuation` 4. List_Type objects may be indexed using an array of indices instead of just a single scalar index. 5. (v2.2.3) Binary literal integers of the form 0bxx...x are supported. Here, x is 0 or 1. The printf "%B" format specifier was added to format integers as binary. 6. (v2.2.3) The dereference operator (@) may be used in a structure definition to include the fields from the dereferenced structure, e.g., space = struct {x, y, z}; spacetime = struct {@space, t}; 7. (v2.2.3) Dereferencing a scalar or vector class type now results in duplication of the object, e.g, @7 will produce 7. 8. (v2.2.3) Mergesort was made the default sorting algorithm. See the array_sort for details. Modules ======= 1. zlib: A module that wraps the popular z compression library. 2. fork: A module that wraps the fork, exec*, and waitpid functions. slsh/lib/process.sl utilizes this module to allow an application to easily create subprocesses and pipelines. 3. sysconf: Module that implements interfaces to the posix sysconf, pathconf, etc. functions. 4. (2.2.3) csv: A module that supports the reading and writing of so-called Comma Separated Values files. Intrinsic Functions =================== The following intrinsic functions have been added for 2.2.x: sumsq equivalent to sum(x*x) expm1 More accurate version of exp(x)-1 for x near 0. log1p More accurate version of log(1+x) for x near 0 list_to_array Creates an array from a list. string_matches A convenient alternative to string_match and string_match_nth functions. strskipbytes (v2.2.3) Skip a range of bytes in a byte string. is_substrbytes (v2.2.3) Like is_substr except this works with binary strings containing embedded null characters. strskipchar, strbskipchar (v2.2.3) Analogous to C ch=*p++ and ch=*p-- for UTF-8 encoded strings. _close Close an integer descriptor _fileno Returns the descriptor as an integer dup2, getsid, killpg, getpriority/setpriority Wraps the corresponding system functions. utime (v2.2.3) Change a file's last access and modification time. ldexp, frexp: If x == a*2^b, where 0.5<=a<1.0 then (a,b)=frexp(x), and x=ldexp(a,b). islower, isupper, isxdigit, isalnum, isalpha, iscntrl, isprint, isgraph, ispunct, isblank, isascii, isspace (v2.2.3): Character classification functions. list_append, list_join (v2.2.3) Functions for merging two lists together. ttyname (v2.2.3) Get the name of the terminal timegm (v2.2.3) Inverse of gmtime The following functions have been enhanced: hypot If given a single array argument, it returns the equivalent of sqrt(sum(X*X)). Support for N arrays added for e.g., the Euclidean norm in an N dimensional space (v2.2.3) _min, _max: (v2.2.3) Added support for more than two elements. polynom The calling interface to this function was changed and support added for arrays. strjoin (v2.2.3) delimiter made optional strreplace (v2.2.3) New usage designed to facilitate the most common case where one wants to replace all the substrings. strtrans (v2.2.3) Additional character classes added (see documentation). string_match, string_matches (v2.2.3) The position argument made optional The following string functions have been vectorized to act upon arrays of strings (v2.2.3): is_substr str_delete_chars strbytelen strcharlen strcmp strcompress strlen strlow strnbytecmp strncharcmp strncmp strtrans strtrim strtrim_beg strtrim_end strup slsh ==== slang readline enhancements: New functions: rline_up/down_hist Behaves similar to zsh up/down-line-or-search functions (v2.2.3). rline_call_editor rline_edit_history rline_edit_line Call external editor for line/history editing. (v2.2.3) Structure field completion. (v2.2.3) Instead of scrolling horizontally when editing a line, attempt to wrap the line. (v2.2.3) setfuns.sl: Various set functions: unique, intersection, complement,union (v2.2.3) Misc ==== Unicode tables updated to version 5.1. =x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x=x NEWS for version 2.1 Building the library ==================== `make install' installs the shared version of the library. Previously `make install' installed just the static version and a separate step (`make install-elf') was required to install the shared version. Now, `make install-static' is necessary to install the static one. Interpreter News ================= Syntax enhancements: -------------------- 1. Short circuiting boolean operators: if ((x == y) || (y == 3) && (x != 4)) ... (orelse and andelse are deprecated) 2. Structure definitions allow embdedded assignment expressions: s = struct {x = 3, name="foo", a = [1:10]}; 3. Qualifiers (aka "keywords") added to the language: save_file ("foo.c"; overwrite=1); plot_points ([1:10], sin([1:10]); color="red", style="solid"); 3. Expressions such as (a < b < c) now interpreted to mean (a<b)and(b<c). 4. New keywords: ifnot, then ifnot may be used instead of !if, which has been deprecated. For "then" see the next item. 5. Looping constructs support a "then" clause that will get executed if the loop runs to completion, e.g., loop (20) { if (this ()) break; % The then clause will NOT get executed } then do_that (); 6. A floating point array of exactly N elements may be created using the form [a:b:#N], where the elements are uniformly spaced and run from a to b, inclusive. 7. References to array elements and structure fields are supported, e.g., &A[3], &s.foo. 8. An exception may be rethrown by calling "throw" without any arguments: try { something (); } catch AnyError: { do_this (); throw; } New Intrinsic Functions: ------------------------ wherenot(x) : Equivalent to where (not(x)) _$(str) : Evaluates strings with embedded "dollar" variables, e.g., _$("$TERM"); __push_list/__pop_list : Push list items onto the stack prod(x) : Computes the product of an array a[0]*a[1]*... minabs(x), maxabs(x): Equivalent to min(abs(x)) and max(abs(x)) getpgrp,setgid, getpgid: Get and set the process group (Unix) setsid : Create a new session API News ======== Although not new I feel that this point should be stressed now because it was not emphasized earlier: The SLarray_* functions that deal with indices or sizes use `SLindex_Type' instead of `int'. Currently, `SLindex_Type' is typedefed to be an `int', but this will change in a future version. So for future compatibility, use `SLindex_Type' instead of `int' in functions that deal with slang arrays. Similarly, instead of using SLang_pop_int for obtaining an array index, use SLang_pop_array_index. See the array-specific examples in the documentation for more information. There have been significant enhancements to the slang readline interface. The interface has been opened up to the interpreter allowing for such features as completion and a persistent history mechanism. Applications wishing to take advantage of these features should use the new function `SLrline_open2' instead of `SLrline_open'. For an example, see how this function is used in slsh/src/readline.c. SLclass_patch_intrin_fun_table was added to facilitiate the patching of intrinsic tables during runtime. If you have created dynamically loaded modules, then you may have a good idea what this function is for. The SLang_Traceback variable is now interpreted as a bitmapped integer providing greater flexibility and control over traceback messages. SLerr_throw was added to permit applications to mimic the semantics of the `throw' statement. SLang_verror_va was added to support calling the error routines with a va_list argument. slsh enhancements ================= When configured to use slang's readline routines, new features include filename completion and persistent history. The profiler was rewritten to be much more friendly, flexible, and more accurate. struct_filter and struct_combine defined in structfuns.sl have been made more flxible. See their documentation for more information. A new function called readascii may be used for reading non-binary (or so-called "ascii") data files. New modules =========== The following modules have been added: iconv: Performs character-set conversion using the iconv library. onig: A regular expression module using oniguruma RE library. rand: A random number module
