GitLab

Detail:
  Remove undocumented 't' mode which forcibly timestamped files, since other operating systems use this to denote a text file (as opposed to 'b' binary mode).
  Add 'x' mode per ISO9899:2018
  * only applies to 'w' mode files (not 'r' or 'a')
  * file must not exist prior to creation
  * beyond that we rely on RISC OS' policy of only allowing a file to be opened once for writing as our exclusivity
  Also fix bug in check for 'Protected disc' error, which only trigged for fsnumber_ADFS (8).
Admin:
  Tested in a ROM build with a simple test harness.

The spec of os_byte() requires 2 valid pointers, since the return values are unconditionally written to them. Use a dummy pointer for the unwanted result, not 0.
Fixes application crash https://www.riscosopen.org/forum/forums/1/topics/15189#posts-101073.

Version 6.04. Tagged as 'RISC_OSLib-6_04'

The change of MIN() to a macro in RISC_OSLib-6_02 tripped up as it called the argument number parse function twice, which advances the parsing offset as a sideeffect. Read it once, then evaluate MIN().
Mark the string argument to txtar__readoptnum() as const.
Ref: https://www.riscosopen.org/forum/forums/11/topics/14632

Version 6.03. Tagged as 'RISC_OSLib-6_03'

Share a (macro) definition with txt1 rather than having lots of local functions scattered around.

Version 6.02. Tagged as 'RISC_OSLib-6_02'

Only suppress the '*' when an existing file is dropped into an empty window, not if via scrap (ie. an application supporting the clipboard, but not the ram fetch protocol). Fixes ticket #461.

Detail:
  Add missing function draw_create_diag() to the ROM version of RISC_OSLib, required by Paint-2_24 and later.
  To keep ROM footprint to a minimum, export only that function; this also avoids adding static workspace and needing to increase RlibSpace.

Version 6.01. Tagged as 'RISC_OSLib-6_01'

Detail:
  Add wimp_autoscroll to rlib entries.

Version 6.00. Not tagged

Detail:
  Export fenv.h (omitted in error).
  Add FP_FAST_FMAL and FP_FAST_FMA defines per C standard
  Submission for ARMv7 Compiler bounty.

  Add Wimp_AutoScroll supporting function to rlib.
  Export various related defines for autoscroll use.
  Submission for Clipboard Support bounty.

Version 6.00. Tagged as 'RISC_OSLib-6_00'

Detail:
  The fix applied to all menus in event.c revision 4.6 didn't take into account the offset of -16 already applied to iconbar menus.
Admin:
  Tested with Draw-1_31.

Version 5.99. Tagged as 'RISC_OSLib-5_99'

colourtran.c: Swap round arg names to colourtran_colournumbertoGCOL to match prototype.
txtar.c: Avoid incorrect use of strncat buffer limit, and possible unterminated string after strncpy, by reexpressing using snprintf.
txtedit.c: Avoid incorrect use of strncat buffer limit by reexpressing using snprintf. Avoid potential NULL pointer dereference by moving the filename copy inside the 'if' which confirms it's non-NULL.
txtfind.c: Remove repeated check of repls being valid. Free repls on error. Free pat on error.
xfersend.c: Fix potential out of bounds array access (of leaf[]) if the leafname length exceeds the space in the Wimp message.
Found by cppcheck static analysis.

txtopt.c/h: Sprinkle in some consts.
event.c: Open menu at the Style Guide approved offset of 64.
xfersend.c: Remove redundant check of xfersend__filename being NULL in xfersend__suggest_leaf() as all paths leading to it being called ensure the allocation exists (also, it would have strcpy'd garbage due to malloc not clearing the allocation).

Removed unused header txtover.h.

Version 5.98. Tagged as 'RISC_OSLib-5_98'

Detail:
  kernel/s/k_body - CPSR_f is the correct field for the NZCV flags, not _c
Admin:
  Untested


Version 5.97. Tagged as 'RISC_OSLib-5_97'

Detail:
  The kernel has a 'callback postponement flag' which will be set whenever an X SWI, called from user mode, returns a pointer to an error (and the error block looks like it's in RAM).
  Although this flag will help prevent the error buffer from being overwritten by any errors generated by callbacks, it will also have the effect of blocking Alt-Break and CLib's Escape handler, due to them both being reliant on callbacks.
  Since the flag may persist for a long time, it can be dangerous to leave the OS in this state (the flag can only be cleared by a SWI call from user mode - which may never happen if the program is stuck in a bad state).
  So to combat this, CLib will now make some effort to try and avoid leaving the postponement flag in situations where it shouldn't be needed.
  File changes:
  - c/armsys:
    - Change _sys_flen to return 0 for TTY streams, since calling OS_Args for them isn't going to generate any useful result (previously it was generating an error, causing the postponement flag to be left set on entry to main())
    - Be extra vigilant when entering main() to make sure the callback postponement flag isn't set, just in case other checks don't resolve it
  - kernel/s/k_body:
    - Change CopyError to attempt to clear the callback postponement flag if we suspect it's set. We've just copied the error to our own buffer, so it should be our job to worry about preventing that buffer being prematurely overwritten, not the kernel's.
Admin:
  Tested on BB-xM
  'while (1) {}' (and similar variants) now multitasks in task windows and is no longer unkillable
  Fixes issue reported on forums:
  https://www.riscosopen.org/forum/forums/4/topics/11542#posts-79767


Version 5.96. Tagged as 'RISC_OSLib-5_96'

Detail:
  kernel/s/k_body - Update AbortFindHandler to check that SP & SL are both word aligned, especially because the code will attempt to load from SL to check for the stack chunk magic marker.
Admin:
  Tested on BB-xM
  Avoids some "abort while in abort handler" type scenarios if an abort occurs while SP/SL are invalid


Version 5.95. Tagged as 'RISC_OSLib-5_95'

The ctl part of rlib has various memory leaks (ref https://www.riscosopen.org/forum/forums/4/topics/9503) reflecting its abandoned state. See the FrontEnd module for a more flexible implementation of the same GUI-in-a-text-file scripting language.
The ctl API was not in C release 3 (it post dates that) nor in C release 4 manual, and the whole of rlib was removed from C release 5 in favour of the Toolbox.
The change log at the top of rlib/s/rl_spare shows it was briefly added in early 1990 then removed in April 1991. 26 years later, cull it from the Makefile too.

Version 5.94. Tagged as 'RISC_OSLib-5_94'

Detail:
  kernel/s/k_body - Eliminate a couple of global OS_SynchroniseCodeAreas calls in _kernel_init and _kernel_system
  s/initmodule - Eliminate a global OS_SynchroniseCodeAreas call in _Shared_Lib_Module_SWI_Code
Admin:
  Tested on iMx6
  Improves performance with SMP ROMs, where global D-cache clean isn't really possible


Version 5.93. Tagged as 'RISC_OSLib-5_93'

Detail:
  kernel/s/k_body, s/initmodule - Remove NOPs from after PSR manipulation macros; the macros now fully take care of ARM2 & StrongARM compatibility for us
Admin:
  Tested PlingSystem build on (ARM3) RISC OS 3.1
  Requires HdrSrc-2_63 for ARM2 compatibility


Version 5.92. Tagged as 'RISC_OSLib-5_92'

Detail:
  s/longlong - Copy-paste error led to conditional being on wrong line
Admin:
  Tested with Raspberry Pi ROM build


Version 5.91. Retagged as 'RISC_OSLib-5_91'

When multiple CPU architectures are supported, allow dynamically linked clients to be given optimal versions of routines where possible

Detail:
  This set of changes adds support for representing architecture-specific variants of routines within the export tables which the shared C library uses to fill in the client's stubs.
  This allows builds of the module which target multiple architectures (e.g. IOMD, Raspberry Pi, or softloads) to offer the most optimal versions of routines to clients wherever multiple variants exist.
  If only one architecture is supported, only one version of each routine will be built, and no variant tables will be generated.
  Currently routine selection for staticly linked clients isn't supported - staticly linked targets will only use the most backwards-compatible version of the routines, as before. Also not all routines are catered for yet (e.g. _ll_udiv)
  File changes:
  - s/h_common - New file containing macros used during variant table construction
  - Makefile - Set SHARED_C_LIBRARY to {TRUE} for SCL builds of assembler code, as per the SHARED_C_LIBRARY #define
  - kernel/s/k_body, s/longlong - For routines which have multiple variants available for the target architectures, build all variants, and generate variant table entries using the new RoutineVariant macro. This has required some reordering of the different variants to make sure that when both versions are built, the most backwards-compatible one will be first (and thus will be called by staticly linked clients)
  - s/h_modmacro - "Entry" macro (when building SCL export tables) changed to use DCD instead of B, to allow byte-aligned symbols to be represented (low bits of symbol address is now used as 'is a variant table' flag)
  - s/initmodule - Client stub initialisation rewritten to take into account the B -> DCD change, and to detect and evaluate variant entries
  - clib/s/cl_entries, kernel/s/k_entries, kernel/s/k_entries2 - Update library entry tables to reference the variant forms of routines where relevant
Admin:
  Tested on Raspberry Pi 1, 2, 3 (ROM), RISC OS 3.1 & StrongARM 3.7 (softload 26bit build)
  Requires Kernel-5_35-4_79_2_325


Version 5.91. Tagged as 'RISC_OSLib-5_91'

Detail:
  When in the default C locale localtime() would return the wrong time for nonzero timezones.
Admin:
  Tested with softloaded C library for each ROM release supported.
  Submission from Rick Murray.

Version 5.90. Tagged as 'RISC_OSLib-5_90'

Prefer CPS over MSR for PSR manipulation. Use UDIV/SDIV for general-purpose division, and UMULL for /10.

Detail:
  s/k_body:
  - _kernel_irqs_off and _kernel_irqs_on now use CPS for disabling/enabling IRQs as opposed to MSR. Apart from being shorter code sequences, it's generally a faster instruction.
  - __rt_udiv and __rt_sdiv (and aliases) now use the UDIV and SDIV instructions if building for ARMv7VE
  - __rt_udiv10 and __rt_sdiv10 (and aliases) now use UMULL to multiply by 1/10 when building for targets with long multiply support, as this is faster than the old method. UDIV/SDIV can be fast too, but only for small numbers, making UMULL the best for the general case.
Admin:
  Tested on Cortex-A15
  Prototyping of division routines on assorted CPUs shows that UDIV/SDIV is generally between 20% and 400% faster than the old routine (Cortex-A7, Cortex-A53), or up to 1300% faster on Cortex-A15 (the CPU does not like the old routine!)
  Division by 10 is now about 20% faster across all appropriate CPUs


Version 5.89. Tagged as 'RISC_OSLib-5_89'

Detail:
  AcquireMutex doesn't have the same functionality as Arm2Swp, best not to
  make people think they might do. Also add an extra literal pool because
  otherwise some instructions don't reach when doing APCS-32 softload builds.

Retagged as 'RISC_OSLib-5_88'

Retagged as RISC_OSLib-5_88.

Detail:
  The SWP and SWPB instructions have finally been removed in ARMv8, after
  having been deprecated for a very long time. This version adds alternative
  versions of code that used to use them with ones that use LDREX/STREX and
  LDREXB/STREXB instead. Soft-loadable C libraries will choose between
  implementations at runtime using OS_PlatformFeatures; ROM builds only
  include the appropriate version for the target hardware.
Admin:
  Tested on Raspberry Pi 3.

Version 5.88. Tagged as 'RISC_OSLib-5_88'

C version of the definition from Hdr:Messages.
Retagged as RISC_OSLib-5_87.

Detail:
  When RISC_OSLib is used to generate menus using menu_new and menu_extend
  there are two (undocumented?) limits on the total menu size:
  - 64 items on a menu. Any more are silently ignored.
  - 1024 bytes of indirect text. Above this, any items have
    several bytes of random rubbish displayed in the menu entry.

  rlib.c.menu (r4.6) has been changed to:
  - remove menu_workarea which was on the stack, and caused limits.
  - only use malloc'd storage areas for the menu.
  - reduce the data copied by at least 50% by changing processing
    from: copy; update; copy
    to  : realloc extend (& copy?); update; realloc shrink (no copy).
  - remove the limits by adding more storage dynamically.
  - simplify code, which reduces the object code size by about 7%.
Admin:
  The changes have been tested on an Iyonix running RO5.23, and VRPC
  running RO4.39, with a large C program with about 80 menus.
  The only noticeable effects were beneficial.
  It has also been tested with artificially low ADDITEMS and ADDBYTES.
  Submission from Martin Avison.

Version 5.87. Tagged as 'RISC_OSLib-5_87'

Function dboxtcol() always opens colour pickers as transient submenus (in the flags to ColourPicker_OpenDialogue, plus listening for the menus deleted message) but chose to open the dialogue at the current mouse pointer, so obscuring part of the menu rather than opening it where the Style Guide wants it.
wimp.h:
  Add a struct definition of menuwarn messages.
txtedit.c/dbox.c/ctl.c:
  Use the menuwarn struct rather than indexing the words[].
dboxtcol.c:
  Provided the last wimp event was the menu warning, use the x/y coordinates from that instead of the mouse pointer.
  Remove some local defines in favour of central ones.
  Make sure we use 0x80000000/0x7F000000 like the PRM says for the other 2 corners of the dialogue, not 0,0.
Tested in a disc build of !Draw.

Version 5.86. Not tagged

Admin:
  Part of submission from Martin Avison. Not tagged.

Detail:
  Export Hdr:ATA if present.
Admin:
  Tagged as RISC_OSLib-5_86-1 since existing binaries unchanged.

See ISO9899:1999 7.25.3.2.1.
Retagged as RISC_OSLib-5_86.

Retagged as RISC_OSLib-5_86

Detail:
  c/armsys - _kernel_language will return NULL if the PC was outside any known library language block, so make sure to check for that before dereferencing the pointer
Admin:
  Builds, untested


Version 5.86. Tagged as 'RISC_OSLib-5_86'

Not tagged.

Make sure 'Edit' isn't left shaded by a previous TaskWindow opening.
Retagged as RISC_OSLib-5_85.

Trim any #if FALSE switches over a decade old, and keep #if TRUE.
Accept EDIT2 and FMTTEXT1 bracketed code.
Remove unused internal functions txt1_dooaction txt1_dosetoaction.
Retagged as RISC_OSLib-5_85.

The txt library part of RISC_OSLib was essentially contrary to everything Acorn was telling its developers, to use the global clipboard.
Additionally, support is added for swap case within a selection.
txt.h:
 Add a new charoption type 'txt_READONLY' to inform txt that the buffer is notionally read only, this is used to supress 'Paste' in the selection menu when appropriate.
 Correct some typos in the comments.
txt1.h:
 Kill off modula 2 dummy structure member.
txtar.h:
 Remove unused function export.
txtfile.h:
 Rename basicimport to be consistent with the text version of the same function. We use 'import' to denote RAM transfers and 'insert' to denote file/scrap transfers throughout.
txtmisc.h:
 Redundant internal functions removed.
txtundo.h:
 Add a new undo operation type 't' for swap case, to avoid polluting the undo buffer with an entire copy of the text where only the case changed.
 Kill off modula 2 double pointer requirement.
txtedit.h:
 Unused structure member 'selectctl' removed.
txt.c:
 Kill off modula 2 double pointer requirement.
txtar.c:
 Refactor message despatch with a switch statement so the save/load/open operations are explicitly checked for, in case the application enables other messages.
txtedit.c:
 Adopt MOVERWRITE, been enabled since 1988 so is probably good to keep.
 Dynamically generate the Select menu by first sending a clipboard request, and fading Paste if no reply comes back.
 Implement changed mouse selection logic.
 Implement different hotkeys and caret navigation.
 Implement copy and paste/replace operations.
 Implement swap case operation.
txtfile.c:
 Type corrections and function rename admin.
 Implement copy and paste/replace operation for detokenised BASIC.
txtmisc.c:
 Supporting functions for clipboard added, supporting functions for ArcEdit removed.
txtscrap.c:
 Make sure the caret is visible for programmatical zero sized selections.
txtundo.c:
 Allow suspension of undo during known complex operations, such as import via RAM transmit. This was a longstanding bug where the import buffer was grabbed in ~4k chunks (even if only 1 byte was being transferred) which in turn resulted in a +4000 undo insertion and a -3999 removal, which given the default undo buffer is only 5k would result in it failing the reversibility test, so no undo was possible.
 Now, during a RAM transmit undo is suspended until the total transfer size is known, and only that data is placed in the undo buffer (subject to the same 5k reversibility limit).
 Add new undo type 't' for swap case operation.
rlibdata.s:
 4 new ints and 1 new BOOL, so RlibSpace increases by 5.

Version 5.85. Tagged as 'RISC_OSLib-5_85'

Add xferrecv_last_ref to get hold of the Wimp message id of the request for a scrap file data save, when the RAM transfer gets no reply. This is useful to allow the data save to be distinguished from a file being dragged to an application, without having to resort to string compares against <wimp$scrap>.
SWIOptions:
 Also add RTC to SWI exports, and remove redundant ones.
armsys.c:
 Treat cmd_string as a pointer.
xferrecv.c/.h/rl_entries:
 New function xferrecv_last_ref.

Version 5.84. Tagged as 'RISC_OSLib-5_84'

Now ObjAsm can ALIGN with arbitrary numbers, use the same trick FileCore does in its header by padding with newlines.
Not tagged.

Detail:
  s/modulewrap - Escape some dollars contained in strings to avoid warnings from objasm
Admin:
  Resulting binary unchanged (FilerAction)


Version 5.83. Retagged as 'RISC_OSLib-5_83'