Check-in [282fd21df6]

{"tip": {
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	"536":{"url":"./tip/536.md","keywords":"Tk","created":"29-March-2019","post-history":"","state":"Draft","tk-branch":"mac_services","tcl-version":"8.6","vote":"","type":"Project","title":"# TIP 536: Improvements to Mac-specific IPC in Tk","author":["Kevin Walzer <[email protected]>"],"is-jest":false},
	"535":{"url":"./tip/535.md","keywords":"Tcl","created":"10-March-2019","post-history":"","state":"Final","tcl-branch":"scale-tick-format","tcl-version":"8.6","vote":"Done","type":"Project","title":"# TIP 535: Remove trailing zeroes in scale ticks","author":["Francois Vogel <[email protected]>"],"is-jest":false},
	"534":{"url":"./tip/534.md","keywords":"Tcl","created":"02-March-2019","post-history":"","state":"Draft","tcl-branch":"dkf-experimental-fast-number-hash","tcl-version":"8.7","vote":"Pending","type":"Project","title":"# TIP 534: Faster Hashing of Small Integers","author":["Donal K. Fellows <[email protected]>"],"is-jest":false},
	"533":{"url":"./tip/533.md","keywords":"Tk, menubutton","":"","[menu man page](https":"//www.tcl.tk/man/tcl/TkCmd/menu.htm).","state":"Final","type":"Project","tk-branch":"bug-70e531918e","author":["Marc Culler"],"three arguments":"two coordinates and an index.  That function uses the","[70e531918e](https":"//core.tcl-lang.org/tk/tktview/70e531918e6d99cbdd8b527386fec15872c64216).","created":"13-Jan-2019","by calling <b>":":tk::PostOverPoint</b> which, like the proposed extension, accepts","a method <b>[nsmenu popupmenupositioningitem":"atLocation:inView]</b> which draws the","title":"# TIP 533: Extension of the menu post command.","the [bug-70e531918e](https":"//core.tcl-lang.org/tk/timeline?r=bug-70e531918e)","post-history":"","vote":"Done","tcl-version":"8.6","is-jest":false},
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	"530":{"url":"./tip/530.md","tcl-ticket":"a09031e288","created":"13-Dec-2018","post-history":"","state":"Draft","tcl-version":"8.6, 8.7","vote":"Pending","type":"Project","title":"# TIP 530: Control over performance impact of TIP 280","author":["Leon Manukyan <[email protected]>"],"is-jest":false},

	"5":{"url":"./tip/5.md","created":"17-Oct-2000","post-history":"","state":"Final","vote":"Done","tcl-version":"8.4","type":"Project","title":"# TIP 5: Make TkClassProcs and TkSetClassProcs Public and Extensible","author":["Eric Melski <[email protected]>"],"is-jest":false},
	"4":{"url":"./tip/4.md","created":"26-Oct-2000","post-history":"","state":"Draft","vote":"Pending","type":"Informative","title":"# TIP 4: Tcl Release and Distribution Philosophy","discussions-to":"news:comp.lang.tcl","author":["Brent Welch <[email protected]>","Donal K. Fellows <[email protected]>","Larry W. Virden <[email protected]>","Larry W. Virden <[email protected]>"],"is-jest":false},
	"3":{"url":"./tip/3.md","created":"14-Sep-2000","post-history":"","state":"Accepted","vote":"Done","type":"Process","title":"# TIP 3: TIP Format","author":["Andreas Kupries <[email protected]>","Donal K. Fellows <[email protected]>"],"is-jest":false},
	"2":{"url":"./tip/2.md","created":"12-Sep-2000","post-history":"","state":"Draft","vote":"Pending","type":"Process","title":"# TIP 2: TIP Guidelines","author":["Andreas Kupries <[email protected]>","Donal K. Fellows <[email protected]>","Don Porter <[email protected]>","Mo DeJong <[email protected]>","Larry W. Virden <[email protected]>","Kevin Kenny <[email protected]>"],"is-jest":false},
	"1":{"url":"./tip/1.md","created":"14-Sep-2000","post-history":"","state":"Active","vote":"No voting","type":"Informational","title":"# TIP 1: TIP Index","author":["TIP Editor <[email protected]>"],"is-jest":false},
	"0":{"url":"./tip/0.md","created":"11-Dec-2000","post-history":"","state":"Final","vote":"Done","type":"Process","title":"# TIP 0: Tcl Core Team Basic Rules","author":["John Ousterhout <[email protected]>"],"is-jest":false},
	"@min": 0,
	"@max": 537
}, "@timestamp": 1554652566}

<th>Type</th>
<th>Tcl Version</th>
<th>Status</th>
<th>Title</th>
<th>Impl.</th>
</tr></thead><tbody>

<tr class='project projectdraft projectdraft90 project90'>
<td valign='top'><a href='./tip/537.md'>537</a></td>
<td valign='top'>Project</td>
<td valign='top'>9.0</td>
<td valign='top'>Draft</td>
<td valign='top'># TIP 537: Enable 64-bit indexes in regexp matching</td>
<td valign='top'><a href='/tcl/timeline?r=regexp-api-64bit'>Link</a></td>
</tr>
<tr class='project projectdraft projectdraft86 project86'>
<td valign='top'><a href='./tip/536.md'>536</a></td>
<td valign='top'>Project</td>
<td valign='top'>8.6</td>
<td valign='top'>Draft</td>
<td valign='top'># TIP 536: Improvements to Mac-specific IPC in Tk</td>
<td valign='top'><a href='/tk/timeline?r=mac_services'>Link</a></td>

# TIP 537: Enable 64-bit indexes in regexp matching
	Author:         Jan Nijtmans <[email protected]>
	State:          Draft
	Type:           Project
	Vote:           
	Created:        7-April-2019
	Post-History:   
	Keywords:       Tcl
	Tcl-Version:    9.0
	Tcl-Branch:     regexp-api-64bit
-----

# Abstract
 
This TIP proposes to modify "struct Tcl\_RegExpInfo" and "struct Tcl\_RegExpIndices, such that the fields indicating indexes change from type "int" to type "size\_t"

# Rationale

This TIP should have been part of TIP #502 (Index Value Reform) and/or TIP #494 (More use of size_t in Tcl 9), but it was overlooked. Without changing this public API, regulare expresion
indexes never can exceed 2G in value.

# Specification and Documentation

Here are the new struct definitions:
<pre>
typedef struct Tcl\_RegExpInfo {
    size\_t nsubs;
    Tcl_RegExpIndices *matches;
    size\_t extendStart;
} Tcl\_RegExpInfo;

typedef struct Tcl\_RegExpIndices {
    size\_t start;
    size\_t end;
} Tcl\_RegExpIndices;
</pre>

Also a new macro TCL\_INDEX\_NONE will be provided, which is the value of the "start"/"end" fields when there is no match.
This macro will be provided to 8.7 as well, but in Tcl 8.7 it will have the value (-1).

# Implementation

An implementation of this TIP is present in the [regexp-api-64bit](https://core.tcl-lang.org/tcl/timeline?r=regexp-api-64bit) branch. 


# Copyright

This document has been placed in the public domain.