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  1. Newsgroups: comp.sources.misc
  2. From: jmd@cyclone.bt.co.uk (John Downey)
  3. Subject:  v33i014:  xvi - portable multi-window vi-like editor, Part05/18
  4. Message-ID: <1992Oct23.181137.148@sparky.imd.sterling.com>
  5. X-Md4-Signature: 44503f913eae7f8693126a162a0c3ccc
  6. Date: Fri, 23 Oct 1992 18:11:37 GMT
  7. Approved: kent@sparky.imd.sterling.com
  8.  
  9. Submitted-by: jmd@cyclone.bt.co.uk (John Downey)
  10. Posting-number: Volume 33, Issue 14
  11. Archive-name: xvi/part05
  12. Environment: Unix, MS-DOS, OS/2, QNX
  13.  
  14. #! /bin/sh
  15. # This is a shell archive.  Remove anything before this line, then feed it
  16. # into a shell via "sh file" or similar.  To overwrite existing files,
  17. # type "sh file -c".
  18. # Contents:  xvi/doc/summary.UU xvi/src/os2vio.c
  19. # Wrapped by kent@sparky on Thu Oct 22 09:03:41 1992
  20. PATH=/bin:/usr/bin:/usr/ucb:/usr/local/bin:/usr/lbin ; export PATH
  21. echo If this archive is complete, you will see the following message:
  22. echo '          "shar: End of archive 5 (of 18)."'
  23. if test -f 'xvi/doc/summary.UU' -a "${1}" != "-c" ; then 
  24.   echo shar: Will not clobber existing file \"'xvi/doc/summary.UU'\"
  25. else
  26.   echo shar: Extracting \"'xvi/doc/summary.UU'\" \(34026 characters\)
  27.   sed "s/^X//" >'xvi/doc/summary.UU' <<'END_OF_FILE'
  28. Xbegin 664 xvi/doc/summary.lst
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  459. XM<'!R;W!R:6%T92!L96YG=&@@*&%C8V]R9&EN9R!T;R!T:&4@=&%B<W1O<',@
  460. XM<&%R86UE=&5R*3L@<V5T=&EN9PH@(" @(&QI<W0@;6]D92!W:6QL(&-A=7-E
  461. XM('1H96T@=&\@8F4@9&ES<&QA>65D(&%S(&$@8V]N=')O;"!C:&%R86-T97(L
  462. XM"B @(" @87,@('=I;&P@('5N<V5T=&EN9R!T:&4@=&%B<R!P87)A;65T97(N
  463. XM("!(;W<@=&AE('1A8B!C:&%R86-T97(@:7,*(" @("!D:7-P;&%Y960@:7,@
  464. XM=&AE;B!U;F1E<B!T:&4@8V]N=')O;"!O9B!T:&4@8V-H87)S('!A<F%M971E
  465. XM<BX*"B @(" @7P@R+E\(,5\(,BX@(%\(35\(;U\(=5\(<U\(92!?"%-?"'5?
  466. XM"'!?"'!?"&]?"')?"'0*"B @(" @4V]M92!M;W5S92!S=7!P;W)T("!I<R @
  467. XM879A:6QA8FQE("!F;W(@(&UI8W)O+6)A<V5D("!S>7-T96US("!A;F0*(" @
  468. XM("!W;W)K<W1A=&EO;G,N("!#;&EC:VEN9R!T:&4@;6]U<V4@8G5T=&]N(&]N
  469. XM.@H*(" @("!A;GD@;&EN92!O=71S:61E(&-U<G)E;G0@=VEN9&]W"@D@(&-H
  470. XM86YG97,@8W5R<F5N="!W:6YD;W<@=&\@=&AE(&]N92 @:6YD:6-A=&5D("!B
  471. XM>2 @=&AE("!M;W5S90H)(" H8V%N(&)E('5S960@:6YS=&5A9"!O9B!G*2X*
  472. XM"B @(" @=&]P(&QI;F4@;V8@86YY('=I;F1O=PH)("!S8W)O;&QS('=I;F1O
  473. XM=R!D;W=N=V%R9',@*'-A;64@87,@7EDI+@H*(" @("!B;W1T;VT@;&EN92!O
  474. XM9B!A;GD@=VEN9&]W"@D@('-C<F]L;',@=VEN9&]W('5P=V%R9',@*'-A;64@
  475. XM87,@7D4I+@H*(" @("!S=&%T=7,@;&EN92!O9B!A;GD@=VEN9&]W"@D@('-H
  476. XM;W=S(&-U<G)E;G0@9FEL92!A;F0@;&EN97,@*'-A;64@87,@7D<I+@H*(" @
  477. XM("!A;GD@=&5X="!L:6YE(&]F(&%N>2!W:6YD;W<*"2 @;6]V97,@=&5X="!C
  478. XM=7)S;W(@87,@;F5A<B!A<R!P;W-S:6)L92!T;R!M;W5S92!C=7)S;W(N"@H@
  479. XM(" @($%L<V\L('=I;F1O=W,@8V%N(&)E(')E<VEZ960@8GD@(F1R86=G:6YG
  480. XM(B!T:&4@87!P<F]P<FEA=&4@<W1A='5S"B @(" @;&EN92!U<"!O<B!D;W=N
  481. XM('=I=&@@=&AE(&UO=7-E+@H*(" @("!?"#(N7P@Q7P@S+B @7PA-7PAI7PAS
  482. XM7PAC7PAE7PAL7PAL7PAA7PAN7PAE7PAO7PAU7PAS"@H@(" @(&\(*R @("!4
  483. XM:&4@.G=N("AW<FET92!F:6QE(&%N9"!E9&ET(&YE>'0I(&-O;6UA;F0@:7,@
  484. XM('!R;W9I9&5D+" @87,*"2 @<&5R(%!#+79I+@H*(" @("!O""L@(" @5&AE
  485. XM<F4@:7,@;F\@;&EM:70@=&\@=&AE(&YU;6)E<B!O<B!S:7IE(&]F(&UA<',@
  486. XM=VAI8V@@;6%Y(&)E"@D@(&1E9FEN960L(&YO<B!I<R!T:&5R92!A;GD@9FEX
  487. XM960@;&EM:70@=&\@=&AE(&YU;6)E<B!O9B!L:6YE<PH*"B @(" @7PA07PAA
  488. XM7PAG7PAE(%\(." @(" @(" @(" @(" @(" @(" @(" @(" @(" @(" @(" @
  489. XM(" @("!?"#)?"#5?"'1?"&@@7PA37PAE7PAP7PAT7PAE7PAM7PAB7PAE7PAR
  490. XM(%\(,5\(.5\(.5\(,@H*"@H*"B @(" @7PA37PAU7PAM7PAM7PAA7PAR7PAY
  491. XM(%\(;U\(9B!?"$1?"&E?"&9?"&9?"&5?"')?"&5?"&Y?"&-?"&5?"',@7PAB
  492. XM7PAE7PAT7PAW7PAE7PAE7PAN(%\(5E\(:2!?"&%?"&Y?"&0@7PA87PAV7PAI
  493. XM(" @(" @(" @(" @(" @(" @(" @("!?"#D*"@H)("!I;B!A(&)U9F9E<BX*
  494. XM"B @(" @;P@K(" @(%1H92 @961I=" @<&%R86UE=&5R("!C;VYT<F]L<R @
  495. XM=VAE=&AE<B @82 @8G5F9F5R("!C86X@("!B90H)("!M;V1I9FEE9"X@("!4
  496. XM:&ES("!M87D@(&)E("!U<V5D+" @=&]G971H97(@=VET:"!T:&4@7PAR7PAE
  497. XM7PAA7PAD7PAO7PAN7PAL7PAY"@D@('!A<F%M971E<BP@=&\@:6UP;&5M96YT
  498. XM(&$@;FEC97(@=F5R<VEO;B!O9B!?"'9?"&E?"&5?"'<H,2D@=&AA;B!V:2=S
  499. XM"@D@('9E<G-I;VXL("!S:6YC92!I="!W;VXG="!F;V]L('EO=2!I;G1O('1H
  500. XM:6YK:6YG('1H870@961I=&EN9PH)("!T:&4@8G5F9F5R(&ES(&EN(&%N>2!W
  501. XM87D@<V%F92X@($)E('=A<FYE9#H@;VYC92 @:&%V:6YG("!S970*"2 @;F]E
  502. XM9&ET+" @:70@(&ES(&YO="!P;W-S:6)L92!T;R!D;R!A(#IS970@961I="X@
  503. XM($ET)W,@82!O;F4M"@D@('=A>2!S=')E970N"@H@(" @(&\(*R @("!4:&4@
  504. XM=&EM96]U="!P87)A;65T97(@:7,@:6UP;&5M96YT960@(&%S("!A("!N=6UE
  505. XM<FEC("!V86QU92P*"2 @<W!E8VEF>6EN9R @=&AE(&YU;6)E<B!O9B!M:6QL
  506. XM:7-E8V]N9',@869T97(@=VAI8V@@=&\@87-S=6UE"@D@('1H870@;F\@9G5R
  507. XM=&AE<B!I;G!U="!I<R @879A:6QA8FQE("!T;R @8V]N=&EN=64@('=I=&@@
  508. XM('1H90H)("!P87)S:6YG("!O9B @82 @;6%P("!S97%U96YC92X@("!4:&ES
  509. XM("!R97!L86-E<R!V:2=S(&)O;VQE86X*"2 @<&%R86UE=&5R(&]F('1H92!S
  510. XM86UE(&YA;64N"@H@(" @(&\(*R @("!4:&4@=F)E;&P@<&%R86UE=&5R(&UA
  511. XM>2!B92!U<V5D('1O('-P96-I9GD@=7-E(&]F(&$@('9I<W5A;"P*"2 @<F%T
  512. XM:&5R('1H86X@875D:6)L92P@8F5L;"P@:68@=&AI<R!I<R!A=F%I;&%B;&4N
  513. XM"@H@(" @(&\(*R @("!4:&4@(#IE8VAO("!C;VUM86YD("!I<R @879A:6QA
  514. XM8FQE.R @:70@('-I;7!L>2 @96-H;V5S("!I=',*"2 @87)G=6UE;G1S+"!A
  515. XM9G1E<B!E>'!A;G-I;VX@;V8@)2!A;F0@(R!C:&%R86-T97)S+@H*(" @("!O
  516. XM""L@(" @26X@:6YS97)T(&%N9"!R97!L86-E(&UO9&5S+"!>7PA!(&AA<R!T
  517. XM:&4@<V%M92!M96%N:6YG("!A<R @7D *"2 @:6X@('9I+" @97AC97!T("!T
  518. XM:&%T(&ET('=O<FMS(&%T(&%N>2!T:6UE+"!N;W0@:G5S="!F;W(@=&AE"@D@
  519. XM(&9I<G-T(&-H87)A8W1E<BX@($%L<V\L('1Y<&EN9R!>0E\(>"P@=VAE<F4@
  520. XM7PAX(&ES('1H92!N86UE(&]F(&$*"2 @8V]N:G5G871E("!B=69F97(L("!I
  521. XM;G-E<G1S('1H92!C;VYT96YT<R!O9B!T:&%T(&)U9F9E<B!I;G1O"@D@('1H
  522. XM92!I;G!U="!S=')E86T@870@=&AA="!P;VEN="X@(%1H92!B=69F97(@;F%M
  523. XM960@(#P@(&%L=V%Y<PH)("!C;VYT86EN<R!T:&4@;&%S="!T:&EN9R!I;G-E
  524. XM<G1E9"P@<V\@=&AA="!>7PA"/"!I<R!T:&4@<V%M92!A<PH)("!>7PA!+@H*
  525. XM(" @("!?"#,N("!?"$1?"&E?"&9?"&9?"&5?"')?"&5?"&Y?"&-?"&5?"',*
  526. XM"B @(" @;P@K(" @($%R9W5M96YT(&AA;F1L:6YG(&ES('-O;65W:&%T(&1I
  527. XM9F9E<F5N=#L@9F]R(&EN<W1A;F-E+" M7PA2(&ES"@D@(&YO=" @<W5P<&]R
  528. XM=&5D+" @8G5T(" B+7,@<&%R86UE=&5R/79A;'5E(B!I<RP@=VAI8V@@:7,@
  529. XM;75C: H)("!M;W)E('5S969U;"!A;GEW87DN"@H@(" @(&\(*R @("!4:&4@
  530. XM7PA87PA67PA)7PA.7PA)7PA4(&5N=FER;VYM96YT('9A<FEA8FQE(&ES(')E
  531. XM860@:6YS=&5A9" @;V8@(%\(15\(6%\(25\(3E\(25\(5"X*"2 @5VAI;'-T
  532. XM(&YO(&9I;&5S(&%R92!S;W5R8V5D(&%U=&]M871I8V%L;'DL('5S97)S('=H
  533. XM;R!W:7-H('1O"@D@(&AA=F4@82!S=&%R='5P(&9I;&4@8V%N(&%R<F%N9V4@
  534. XM:70@=F5R>2 @96%S:6QY+B @(%\(<U\(:"@Q*2 @;W(*"2 @7PAK7PAS7PAH
  535. XM*#$I('5S97)S('-H;W5L9"!A9&0@=&AI<R!L:6YE('1O('1H96ER("1?"$A?
  536. XM"$]?"$U?"$4O+E\(<%\(<E\(;U\(9E\(:5\(;%\(93H*"@D)("!?"%A?"%9?
  537. XM"$E?"$Y?"$E?"%0])U\(<U\(;U\(=5\(<E\(8U\(92!?"'A?"'9?"&DM7PAS
  538. XM7PAT7PAA7PAR7PAT7PAU7PAP+5\(9E\(:5\(;%\(92<[(%\(95\(>%\(<%\(
  539. XM;U\(<E\(="!?"%A?"%9?"$E?"$Y?"$E?"%0*"@D@(%\(8U\(<U\(:"@Q*2!U
  540. XM<V5R<R!S:&]U;&0@861D('1H:7,@=&\@=&AE:7(@)%\(2%\(3U\(35\(12\N
  541. XM7PAL7PAO7PAG7PAI7PAN.@H*"0D@(%\(<U\(95\(=%\(95\(;E\(=B!?"%A?
  542. XM"%9?"$E?"$Y?"$E?"%0@)U\(<U\(;U\(=5\(<E\(8U\(92!?"'A?"'9?"&DM
  543. XM7PAS7PAT7PAA7PAR7PAT7PAU7PAP+5\(9E\(:5\(;%\(92<*"@D@(&%N9"!-
  544. XM4RU$3U,@=7-E<G,@<VAO=6QD(&%D9"!T:&ES('1O('1H96ER(%\(85\(=5\(
  545. XM=%\(;U\(95\(>%\(95\(8RY?"&)?"&%?"'0Z"@H)"2 @7PAS7PAE7PAT(%\(
  546. XM6%\(5E\(25\(3E\(25\(5#U?"'-?"&]?"'5?"')?"&-?"&4@7PAX7PAV7PAI
  547. XM+5\(<U\(=%\(85\(<E\(=%\(=5\(<"U?"&9?"&E?"&Q?"&4*"@H@(" @(&\(
  548. XM*R @("!4:&4@=&%G<R!P87)A;65T97(@8V%N(&)E("!U<V5D("!T;R @<W!E
  549. XM8VEF>2 @;75L=&EP;&4@('1A9W,*"2 @9FEL97,[("!T:&5S92 @8V%N("!B
  550. XM92 @<V5P87)A=&5D("!B>2!E:71H97(@(EP@(B H8F%C:W-L87-H"@D@('-P
  551. XM86-E*2!O<B B+"(@*&-O;6UA*2X*"@H@(" @(%\(,E\(-5\(=%\(:"!?"%-?
  552. XM"&5?"'!?"'1?"&5?"&U?"&)?"&5?"'(@7P@Q7P@Y7P@Y7P@R(" @(" @(" @
  553. XM(" @(" @(" @(" @(" @(" @(" @(" @(" @(" @(%\(4%\(85\(9U\(92!?
  554. XM"#D*"@H*"@H@(" @(%\(,5\(," @(" @(" @(" @(" @(" @(" @("!?"%-?
  555. XM"'5?"&U?"&U?"&%?"')?"'D@7PAO7PAF(%\(1%\(:5\(9E\(9E\(95\(<E\(
  556. XM95\(;E\(8U\(95\(<R!?"&)?"&5?"'1?"'=?"&5?"&5?"&X@7PA67PAI(%\(
  557. XM85\(;E\(9"!?"%A?"'9?"&D*"@H@(" @(&\(*R @("!!;'1E<FYA=&4@9FEL
  558. XM97,@87)E(&AA;F1L960@<VQI9VAT;'D@9&EF9F5R96YT;'DL("!O=VEN9R @
  559. XM=&\*"2 @=&AE("!P<F5S96YC92 @;V8@(&)U9F9E<B!A;F0@=VEN9&]W(&AA
  560. XM;F1L:6YG+B @17-S96YT:6%L;'DL"@D@('=H96X@>6]U(&-L;W-E(&$@8G5F
  561. XM9F5R+"!I=',@9FEL96YA;64@:7,@<F5M96UB97)E9" @87,@('1H90H)("!A
  562. XM;'1E<FYA=&4@(&9I;&4[("!W:&5N("!Y;W4@(&EN=F]K92!T:&4@7EX@;W(@
  563. XM.F4@(R!C;VUM86YD<RP*"2 @=&AI<R @9FEL96YA;64@(&ES("!R92UE9&ET
  564. XM960N(" @3F]T92 @=&AA=" @7EX@(&5D:71S(" @=&AE"@D@(&%L=&5R;F%T
  565. XM92!F:6QE(&EN(&$@;F5W(&)U9F9E<B!W:6YD;W<N"@H@(" @(&\(*R @("!(
  566. XM:71T:6YG('1H92!E<V-A<&4@:V5Y('=H:6QE(&EN('1H92!C;VUM86YD("!L
  567. XM:6YE("!D;V5S("!N;W0*"2 @=&5R;6EN871E("!I;G!U=#L@(&EN<W1E860L
  568. XM("!I="!C86YC96QS(&EN<'5T+"!R971U<FYI;F<@=&AE"@D@('!R;VUP="!T
  569. XM;R!T:&4@8F5G:6YN:6YG(&]F('1H92!L:6YE+B @5&AI<R!A<'!L:65S('1O
  570. XM("!I;G!U= H)("!F;W(@.BP@+RP@/R @86YD("$N"@H@(" @(&\(*R @("!#
  571. XM:&%R86-T97(M8F%S960@('EA;FMS(" H;W(@("!D96QE=&5S*2 @('=H:6-H
  572. XM(" @<W!A;B @(&QI;F4*"2 @8F]U;F1A<FEE<R!A<F4@:&%N9&QE9"!C;W)R
  573. XM96-T;'D@*'9I(&=E=',@=&AI<R!W<F]N9RDN"@H*"@H*"@H*"@H*"@H*"@H*
  574. XM"@H*"@H*"@H*"@H*"@H*"@H*"@H*"@H*"@H@(" @(%\(4%\(85\(9U\(92!?
  575. XM"#%?"# @(" @(" @(" @(" @(" @(" @(" @(" @(" @(" @(" @(" @("!?
  576. XM"#)?"#5?"'1?"&@@7PA37PAE7PAP7PAT7PAE7PAM7PAB7PAE7PAR(%\(,5\(
  577. X*.5\(.5\(,@H*"F@@
  578. X 
  579. Xend
  580. END_OF_FILE
  581.   if test 34030 -ne `wc -c <'xvi/doc/summary.UU'`; then
  582.     echo shar: \"'xvi/doc/summary.UU'\" unpacked with wrong size!
  583.   else
  584.     echo shar: Uudecoding \"'xvi/doc/summary.lst'\" \(24670 characters\)
  585.     cat 'xvi/doc/summary.UU' | uudecode
  586.     if test -f 'xvi/doc/summary.lst' ; then
  587.       if test 24670 -ne `wc -c <'xvi/doc/summary.lst'`; then
  588.         echo shar: \"'xvi/doc/summary.lst'\" uudecoded with wrong size!
  589.       else
  590.         rm 'xvi/doc/summary.UU'
  591.       fi
  592.     else
  593.       echo shar: \"'xvi/doc/summary.lst'\" uudecode failed!
  594.     fi
  595.   fi
  596.   # end of 'xvi/doc/summary.UU'
  597. fi
  598. if test -f 'xvi/src/os2vio.c' -a "${1}" != "-c" ; then 
  599.   echo shar: Will not clobber existing file \"'xvi/src/os2vio.c'\"
  600. else
  601.   echo shar: Extracting \"'xvi/src/os2vio.c'\" \(18336 characters\)
  602.   sed "s/^X//" >'xvi/src/os2vio.c' <<'END_OF_FILE'
  603. X#ifndef lint
  604. Xstatic char *sccsid = "@(#)os2vio.c    2.1 (Chris & John Downey) 7/29/92";
  605. X#endif
  606. X
  607. X/***
  608. X
  609. X* program name:
  610. X    xvi
  611. X* function:
  612. X    PD version of UNIX "vi" editor, with extensions.
  613. X* module name:
  614. X    os2vio.c
  615. X
  616. X* module function:
  617. X    OS/2 system interface module.
  618. X
  619. X    This is a character-based implementation using the VIO & KBD
  620. X    families of system calls. It doesn't use the Presentation Manager
  621. X    but, on OS/2 version 1.* at least, it can be made to work in a PM
  622. X    shell window by using markexe (see makefile.os2).
  623. X
  624. X    Like the MS-DOS version, this one saves the screen contents &
  625. X    restores them when it exits.
  626. X
  627. X    Currently, the mouse input code doesn't work, & so is commented
  628. X    out. I suspect that, if we want to have both mouse & keyboard
  629. X    input, we have to use a device monitor, or develop a real PM
  630. X    implementation.
  631. X* history:
  632. X    STEVIE - ST Editor for VI Enthusiasts, Version 3.10
  633. X    Originally by Tim Thompson (twitch!tjt)
  634. X    Extensive modifications by Tony Andrews (onecom!wldrdg!tony)
  635. X    Heavily modified by Chris & John Downey
  636. X
  637. X***/
  638. X
  639. X#include "xvi.h"
  640. X
  641. X#define NOMOUSE
  642. X
  643. X#ifdef __ZTC__
  644. X/*
  645. X * Set default stack size.
  646. X *
  647. X * See i286.asm for an explanation of why it has to be so big.
  648. X */
  649. Xunsigned    _stack = 44 * 1024;
  650. X#endif
  651. X
  652. X/*
  653. X * These are globals which are set by the system interface or terminal
  654. X * interface module, & used for various purposes throughout the rest
  655. X * of xvi.
  656. X *
  657. X * Number of rows & columns in the current window.
  658. X */
  659. Xunsigned    Rows,
  660. X        Columns;
  661. X/*
  662. X * Current position for screen writes.
  663. X */
  664. Xunsigned char    virt_row,
  665. X        virt_col;
  666. X/*
  667. X * Screen cell (character & attribute): current colour is stored here.
  668. X */
  669. Xunsigned char    curcell [2];
  670. X
  671. X/*
  672. X * Time of last keypress or mouse button press (or garbage if
  673. X * (keystrokes < PSVKEYS)).
  674. X *
  675. X * This should only be referenced within a thread's critical section.
  676. X * Referencing a 32-bit variable is not generally an atomic operation
  677. X * on the 80286.
  678. X */
  679. Xstatic volatile clock_t lastevent;
  680. X
  681. X#ifndef NOMOUSE
  682. X    /*
  683. X     * This is FALSE if we don't appear to have a mouse driver.
  684. X     */
  685. X    static bool_t    usemouse;
  686. X
  687. X    /*
  688. X     * Our logical mouse handle.
  689. X     */
  690. X    static HMOU    mousenum;
  691. X
  692. X#else    /* NOMOUSE */
  693. X#   define    usemouse    FALSE
  694. X#endif    /* NOMOUSE */
  695. X
  696. X#ifndef NOMOUSE
  697. X    /*
  698. X     * Hide mouse cursor.
  699. X     */
  700. X    static void
  701. X    hidemouse()
  702. X    {
  703. X    NOPTRRECT    r;
  704. X
  705. X    r.row = r.col = 0;
  706. X    r.cRow = Rows - 1;
  707. X    r.cCol = Columns - 1;
  708. X    (void) MouRemovePtr((PNOPTRRECT) &r, mousenum);
  709. X    }
  710. X
  711. X#endif    /* NOMOUSE */
  712. X
  713. X/*
  714. X * Show mouse cursor. (This is for symmetry with hidemouse().)
  715. X */
  716. X#define showmouse()    ((void) MouDrawPtr(mousenum))
  717. X
  718. Xstatic long    semvec [2];
  719. X
  720. X/*
  721. X * This semaphore needs to be acquired by a thread before it enters a
  722. X * critical region.
  723. X */
  724. X#define        control ((HSEM)(long FAR *)&semvec[0])
  725. X
  726. X/*
  727. X * This semaphore is used for communication between the main thread &
  728. X * the thread which handles automatic buffer preservation. It should
  729. X * be clear when (keystrokes >= PSVKEYS), otherwise it should be set.
  730. X */
  731. X#define        psvsema ((HSEM)(long FAR *)&semvec[1])
  732. X
  733. X#ifndef NOMOUSE
  734. X
  735. Xstatic void
  736. Xmousehandler()
  737. X{
  738. X    for (;;) {
  739. X    MOUEVENTINFO    m;
  740. X    unsigned short    status;
  741. X    clock_t        start;
  742. X
  743. X#if 0
  744. X    if (MouGetDevStatus((PUSHORT) &status, mousenum) != 0
  745. X        ||
  746. X        (status & (MOUSE_UNSUPPORTED_MODE | MOUSE_DISABLED))
  747. X    ) {
  748. X        hidemouse();
  749. X        (void) MouClose(mousenum);
  750. X        DosExit(EXIT_THREAD, 0);
  751. X    }
  752. X#endif
  753. X    status = MOU_WAIT;
  754. X    MouReadEventQue((PMOUEVENTINFO) &m, (PUSHORT) &status, mousenum);
  755. X    /*
  756. X     * If we don't get the control semaphore immediately,
  757. X     * we do nothing. Delayed responses to mouse button
  758. X     * presses could be confusing.
  759. X     */
  760. X#if 0
  761. X    start = clock();
  762. X#endif
  763. X    if (DosSemRequest(control, SEM_IMMEDIATE_RETURN) != 0)
  764. X        continue;
  765. X#if 0
  766. X    if (clock() != start) {
  767. X        (void) fprintf(stderr, "mouse thread: %d\n", __LINE__);
  768. X        DosSemClear(control);
  769. X        continue;
  770. X    }
  771. X#endif
  772. X    /*
  773. X     * Start of critical section.
  774. X     */
  775. X    if (++keystrokes >= PSVKEYS)
  776. X        lastevent = clock();
  777. X    if (State == NORMAL &&
  778. X        (m.fs & (MOUSE_BN1_DOWN | MOUSE_BN2_DOWN | MOUSE_BN3_DOWN))) {
  779. X        hidemouse();
  780. X        mouseclick(m.row, m.col);
  781. X        showmouse();
  782. X    }
  783. X    /*
  784. X     * End of critical section.
  785. X     */
  786. X    DosSemClear(control);
  787. X    }
  788. X}
  789. X
  790. X#endif    /* NOMOUSE */
  791. X
  792. X/*
  793. X * Macro to convert clock ticks to milliseconds.
  794. X */
  795. X#if CLK_TCK == 1000
  796. X#   define CLK2MS(c)        (c)
  797. X#else
  798. X#   if CLK_TCK < 1000
  799. X#    define CLK2MS(c)    ((c) * (1000 / CLK_TCK))
  800. X#   else
  801. X#    define CLK2MS(c)    ((c) / (CLK_TCK / 1000))
  802. X#   endif    /* CLK_TCK > 1000 */
  803. X#endif    /* CLK_TCK != 1000 */
  804. X
  805. X/*
  806. X * Number of keystrokes or mouse button presses since the last buffer
  807. X * preservation.
  808. X */
  809. Xvolatile int        keystrokes;
  810. X
  811. X/*
  812. X * This function handles automatic buffer preservation. It runs in its
  813. X * own thread, which is only awake when keystrokes >= PSVKEYS and the
  814. X * main thread is waiting for keyboard input. Even then, it spends
  815. X * most of its time asleep.
  816. X */
  817. Xstatic void FAR
  818. Xpsvhandler()
  819. X{
  820. X    for (;;) {
  821. X    long    sleeptime;
  822. X
  823. X    DosSemWait(psvsema, SEM_INDEFINITE_WAIT);
  824. X    DosSemRequest(control, SEM_INDEFINITE_WAIT);
  825. X    /*
  826. X     * Start of critical section.
  827. X     */
  828. X    if (keystrokes < PSVKEYS) {
  829. X        sleeptime = 0;
  830. X        /*
  831. X         * If we haven't had at least PSVKEYS
  832. X         * keystrokes, psvsema should be set.
  833. X         */
  834. X        DosSemSet(psvsema);
  835. X    } else if ((sleeptime = (long) Pn(P_preservetime) * 1000 -
  836. X              CLK2MS(clock() - lastevent)) <= 0) {
  837. X        /*
  838. X         * If Pn(P_presevetime) seconds haven't yet
  839. X         * elapsed, sleep until they should have - but
  840. X         * NOT within the critical section (!).
  841. X         *
  842. X         * Otherwise do automatic preserve.
  843. X         *
  844. X         * do_preserve() should reset keystrokes to 0.
  845. X         */
  846. X        (void) do_preserve();
  847. X        sleeptime = 0;
  848. X    }
  849. X    /*
  850. X     * End of critical section.
  851. X     */
  852. X    DosSemClear(control);
  853. X    /*
  854. X     * Sleep if we have to.
  855. X     */
  856. X    if (sleeptime != 0)
  857. X        DosSleep(sleeptime);
  858. X    }
  859. X}
  860. X
  861. X/*
  862. X * inchar() - get a character from the keyboard.
  863. X *
  864. X * Timeout not implemented yet for OS/2.
  865. X */
  866. Xint
  867. Xinchar(long mstimeout)
  868. X{
  869. X    for (;;) {
  870. X    KBDKEYINFO k;
  871. X    bool_t    mstatus,
  872. X        psvstatus;
  873. X
  874. X    flush_output();
  875. X
  876. X    mstatus = (usemouse && State == NORMAL);
  877. X    psvstatus = (keystrokes >= PSVKEYS);
  878. X    /*
  879. X     * We don't have to give control to any other thread
  880. X     * if neither of these conditions is true.
  881. X     */
  882. X    if (mstatus || psvstatus) {
  883. X#ifndef NOMOUSE
  884. X        if (mstatus)
  885. X        showmouse();
  886. X#endif
  887. X        if (psvstatus && DosSemWait(psvsema, SEM_IMMEDIATE_RETURN)
  888. X                            == ERROR_SEM_TIMEOUT) {
  889. X        /*
  890. X         * If psvsema is set, clear it.
  891. X         */
  892. X        DosSemClear(psvsema);
  893. X        }
  894. X        DosSemClear(control);
  895. X    }
  896. X    /*
  897. X     * Start of non-critical section.
  898. X     *
  899. X     * Wait for character from keyboard.
  900. X     */
  901. X    KbdCharIn((PKBDKEYINFO) &k, IO_WAIT, 0);
  902. X    /*
  903. X     * End of non-critical section.
  904. X     */
  905. X    if (mstatus || psvstatus) {
  906. X        DosSemRequest(control, SEM_INDEFINITE_WAIT);
  907. X#ifndef NOMOUSE
  908. X        if (mstatus)
  909. X        hidemouse();
  910. X#endif
  911. X    }
  912. X    if (++keystrokes >= PSVKEYS)
  913. X        lastevent = clock();
  914. X    /*
  915. X     * Now deal with the keypress information.
  916. X     */
  917. X    if ((unsigned char) k.chChar == (unsigned char) 0xe0) {
  918. X    /*
  919. X     * It's (probably) a function key.
  920. X     */
  921. X        if (k.chScan == 0x53)
  922. X        /*
  923. X         * It's the delete key.
  924. X         */
  925. X        return State == NORMAL ? 'x' : '\b';
  926. X         /* else */
  927. X        if (State == NORMAL) {
  928. X        /*
  929. X         * Assume it must be a function key.
  930. X         */
  931. X        switch (k.chScan) {
  932. X            case 0x3b: return(K_HELP);
  933. X            /* F1 key */
  934. X            case 0x47: return('H');
  935. X            /* home key */
  936. X            case 0x48: return('k');
  937. X            /* up arrow key */
  938. X            case 0x49: return(CTRL('B'));
  939. X            /* page up key */
  940. X            case 0x4b: return('\b');
  941. X            /* left arrow key */
  942. X            case 0x4d: return(' ');
  943. X            /* right arrow key */
  944. X            case 0x4f: return('L');
  945. X            /* end key */
  946. X            case 0x50: return('j');
  947. X            /* down arrow key */
  948. X            case 0x51: return(CTRL('F'));
  949. X            /* page down key */
  950. X            case 0x52: return('i');
  951. X            /* insert key */
  952. X            default:
  953. X            /* just ignore it ... */
  954. X            continue;
  955. X        }
  956. X        /*
  957. X         * If we aren't in command mode, 0xe0
  958. X         * is a perfectly legitimate
  959. X         * character, & we can't really tell
  960. X         * whether or not it's supposed to be
  961. X         * a function key, so we just have to
  962. X         * return it as is.
  963. X         */
  964. X        }
  965. X    }
  966. X    return (unsigned char) k.chChar;
  967. X    }
  968. X}
  969. X
  970. Xvoid
  971. Xoutchar(int c)
  972. X{
  973. X    curcell [0] = c;
  974. X    VioWrtNCell((PBYTE) curcell, 1, virt_row, virt_col, 0);
  975. X    if (++virt_col >= Columns) {
  976. X    virt_col -= Columns;
  977. X    if (++virt_row >= Rows)
  978. X        virt_row = Rows - 1;
  979. X    }
  980. X}
  981. X
  982. Xvoid
  983. Xoutstr(char* s)
  984. X{
  985. X    unsigned len = strlen(s);
  986. X
  987. X    VioWrtCharStrAtt((PCH) s, len, virt_row, virt_col,
  988. X                     (PBYTE) & curcell [1], 0);
  989. X    if ((virt_col += len) >= Columns) {
  990. X    virt_col -= Columns;
  991. X    if (++virt_row >= Rows)
  992. X        virt_row = Rows - 1;
  993. X    }
  994. X}
  995. X
  996. Xvoid
  997. Xerase_display()
  998. X{
  999. X    curcell[1] = Pn(P_colour);
  1000. X    curcell[0] = ' ';
  1001. X    VioWrtNCell((PBYTE) curcell, Rows * Columns, 0, 0, 0);
  1002. X}
  1003. X
  1004. Xvoid
  1005. Xerase_line()
  1006. X{
  1007. X    curcell [0] = ' ';
  1008. X    VioWrtNCell((PBYTE) curcell, Columns - virt_col, virt_row, virt_col, 0);
  1009. X}
  1010. X
  1011. Xvoid
  1012. Xscroll_down(unsigned start, unsigned end, unsigned nlines)
  1013. X{
  1014. X    curcell [0] = ' ';
  1015. X    VioScrollDn(start, 0, end, Columns - 1, nlines, (PBYTE) curcell, 0);
  1016. X}
  1017. X
  1018. Xvoid
  1019. Xscroll_up(unsigned start, unsigned end, unsigned nlines)
  1020. X{
  1021. X    curcell [0] = ' ';
  1022. X    VioScrollUp(start, 0, end, Columns - 1, nlines, (PBYTE) curcell, 0);
  1023. X}
  1024. X
  1025. X/*
  1026. X * Attributes for colour systems
  1027. X */
  1028. X#define BRIGHT    8    /* only available for foreground colours */
  1029. X#define BLACK    0
  1030. X#define BLUE    1
  1031. X#define GREEN    2
  1032. X#define CYAN    (BLUE | GREEN)
  1033. X#define RED    4
  1034. X#define BROWN    (RED | GREEN)
  1035. X#define YELLOW    (BRIGHT | BROWN)
  1036. X#define WHITE    (RED | GREEN | BLUE)
  1037. X
  1038. X/*
  1039. X * macro to set up foreground & background colours
  1040. X */
  1041. X#define mkcolour(f,b)    ((unsigned char) (((b) << 4) | ((f) & 0xf)))
  1042. X
  1043. Xstatic char                *oldscreen;
  1044. Xstatic unsigned short            scrsize;
  1045. Xstatic enum { m_SYS = 0, m_VI = 1 }    curmode;
  1046. X
  1047. X/*
  1048. X * Save screen contents & set up video & keyboard states for editor.
  1049. X */
  1050. Xvoid
  1051. Xsys_startv()
  1052. X{
  1053. X    if (curmode == m_VI)
  1054. X    return;
  1055. X    if (oldscreen != NULL) {
  1056. X    /*
  1057. X     * Save contents of screen so we can restore them
  1058. X     * afterwards.
  1059. X     */
  1060. X    VioReadCellStr((PCH) oldscreen, (PUSHORT) &scrsize, 0, 0, 0);
  1061. X    }
  1062. X    set_colour(Pn(P_colour));
  1063. X    /*
  1064. X     * Change keyboard status.
  1065. X     *
  1066. X     * We only do this when we've disabled keyboard interrupts.
  1067. X     */
  1068. X    {
  1069. X    KBDINFO        k;
  1070. X
  1071. X    k.cb = sizeof k;
  1072. X    KbdGetStatus((PKBDINFO) &k, 0);
  1073. X    k.fsMask = (k.fsMask
  1074. X        /*
  1075. X         * turn these flags off:
  1076. X         */
  1077. X         & ~(KEYBOARD_ECHO_ON |
  1078. X         KEYBOARD_ASCII_MODE |
  1079. X         KEYBOARD_MODIFY_STATE |
  1080. X         KEYBOARD_MODIFY_INTERIM |
  1081. X         KEYBOARD_MODIFY_TURNAROUND |
  1082. X         KEYBOARD_2B_TURNAROUND |
  1083. X         KEYBOARD_SHIFT_REPORT))
  1084. X        /*
  1085. X         * turn these flags on:
  1086. X         */
  1087. X        | KEYBOARD_ECHO_OFF |
  1088. X          KEYBOARD_BINARY_MODE;
  1089. X    KbdSetStatus((PKBDINFO) &k, 0);
  1090. X    }
  1091. X    curmode = m_VI;
  1092. X}
  1093. X
  1094. Xvoid
  1095. Xsys_init()
  1096. X{
  1097. X    {
  1098. X    VIOMODEINFO    v;
  1099. X
  1100. X    /*
  1101. X     * Get information about display.
  1102. X     */
  1103. X    v.cb = sizeof v;
  1104. X    VioGetMode((PVIOMODEINFO) &v, 0);
  1105. X    Rows = v.row;
  1106. X    Columns = v.col;
  1107. X    scrsize = (Rows - 1) * Columns * 2;
  1108. X    if (v.color >= COLORS_16) {
  1109. X        /*
  1110. X         * Statically defined values are for mono systems:
  1111. X         * these are defaults for colour systems.
  1112. X         */
  1113. X        set_param(P_colour, mkcolour(BRIGHT | WHITE, BLUE));
  1114. X        set_param(P_statuscolour, mkcolour(YELLOW, BLACK));
  1115. X        set_param(P_roscolour, mkcolour(BRIGHT | RED, BLACK));
  1116. X        set_param(P_systemcolour, mkcolour(BRIGHT | CYAN, BLACK));
  1117. X    }
  1118. X    }
  1119. X    oldscreen = malloc(scrsize);
  1120. X    /*
  1121. X     * We have to acquire this semaphore before we start any other
  1122. X     * threads.
  1123. X     */
  1124. X    DosSemSet(control);
  1125. X#ifndef NOMOUSE
  1126. X    /*
  1127. X     * Open mouse device if we can.
  1128. X     */
  1129. X    if (MouOpen((PSZ) NULL, (PHMOU) &mousenum) == 0
  1130. X#if 0
  1131. X    && MouSynch(0) != 0
  1132. X#endif
  1133. X    ) {
  1134. X    TID        mousethread;
  1135. X    short        mask = MOUSE_BN1_DOWN |
  1136. X                   MOUSE_BN2_DOWN |
  1137. X                   MOUSE_BN3_DOWN;
  1138. X
  1139. X    hidemouse();
  1140. X#if 0
  1141. X    MouSetEventMask((PUSHORT) &mask, mousenum);
  1142. X#endif
  1143. X    /*
  1144. X     * Create concurrent thread to handle mouse events.
  1145. X     *
  1146. X     * According to Microsoft, the ES register should be
  1147. X     * set to 0 first.
  1148. X     */
  1149. X    DosCreateThread((PFNTHREAD) mousehandler,
  1150. X        (es0(), (PTID) &mousethread), (PBYTE) newstack(32000));
  1151. X    usemouse = TRUE;
  1152. X    }
  1153. X#endif    /* NOMOUSE */
  1154. X    /*
  1155. X     * Initialize semaphore for automatic buffer preservation. It
  1156. X     * should only be clear if (keystrokes >= PSVKEYS).
  1157. X     */
  1158. X    DosSemSet(psvsema);
  1159. X    /*
  1160. X     * Create concurrent thread to do automatic preserves.
  1161. X     *
  1162. X     * According to Microsoft, the ES register should be set to 0 first.
  1163. X     */
  1164. X    {
  1165. X    TID psvthread;
  1166. X
  1167. X    if (DosCreateThread((PFNTHREAD) psvhandler,
  1168. X            (es0(), (PTID) &psvthread),
  1169. X            (PBYTE) newstack(20000)) != 0) {
  1170. X        (void) fputs("Can't create thread for automatic preserves\r\n",
  1171. X             stderr);
  1172. X        exit(1);
  1173. X    }
  1174. X    }
  1175. X    /*
  1176. X     * Disable system critical error handler.
  1177. X     */
  1178. X    DosError(HARDERROR_DISABLE);
  1179. X    sys_startv();
  1180. X}
  1181. X
  1182. X/*
  1183. X * Restore video & keyboard states to what they were when we started.
  1184. X *
  1185. X * sys_endv() can be called when we're already in system mode, so we
  1186. X * have to check.
  1187. X */
  1188. Xvoid
  1189. Xsys_endv()
  1190. X{
  1191. X    KBDINFO k;
  1192. X
  1193. X    if (curmode == m_SYS)
  1194. X    return;
  1195. X    k.cb = sizeof k;
  1196. X    KbdGetStatus((PKBDINFO) &k, 0);
  1197. X    k.fsMask = (k.fsMask
  1198. X        /*
  1199. X         * turn these flags off:
  1200. X         */
  1201. X         & ~(KEYBOARD_ECHO_OFF |
  1202. X         KEYBOARD_BINARY_MODE |
  1203. X         KEYBOARD_MODIFY_STATE |
  1204. X         KEYBOARD_MODIFY_INTERIM |
  1205. X         KEYBOARD_MODIFY_TURNAROUND |
  1206. X         KEYBOARD_2B_TURNAROUND |
  1207. X         KEYBOARD_SHIFT_REPORT))
  1208. X        /*
  1209. X         * turn these flags on:
  1210. X         */
  1211. X        | KEYBOARD_ECHO_ON |
  1212. X          KEYBOARD_ASCII_MODE;
  1213. X    KbdSetStatus((PKBDINFO) &k, 0);
  1214. X    if (oldscreen != (char*) 0)
  1215. X    /*
  1216. X     * Restore contents of screen saved by
  1217. X     * sys_startv().
  1218. X     */
  1219. X    VioWrtCellStr((PCH) oldscreen, scrsize, 0, 0, 0);
  1220. X    tty_goto(Rows - 1, 0);
  1221. X    set_colour(Pn(P_systemcolour));
  1222. X    erase_line();
  1223. X    flush_output();
  1224. X    curmode = m_SYS;
  1225. X}
  1226. X
  1227. Xvoid
  1228. Xsys_exit(int r)
  1229. X{
  1230. X    sys_endv();
  1231. X#ifndef NOMOUSE
  1232. X    if (usemouse)
  1233. X    MouClose(mousenum);
  1234. X#endif
  1235. X    exit(r);
  1236. X}
  1237. X
  1238. Xvoid
  1239. Xsleep(unsigned seconds)
  1240. X{
  1241. X    DosSleep(seconds * (long) 1000);
  1242. X}
  1243. X
  1244. X/*
  1245. X * This function is only used by tempfname(). It constructs a filename
  1246. X * suffix based on an index number.
  1247. X *
  1248. X * The suffix ".$$$" is commonly used for temporary file names on
  1249. X * MS-DOS & OS/2 systems. We also use the sequence ".$$1", ".$$2" ...
  1250. X * ".fff" (all digits are hexadecimal).
  1251. X */
  1252. Xstatic char*
  1253. Xhexsuffix(unsigned i)
  1254. X{
  1255. X    static char    suffix[] = ".$$$";
  1256. X    static char    hextab[] = "0123456789abcdef";
  1257. X    char    *sp = &suffix[3];
  1258. X
  1259. X    while (sp > suffix) {
  1260. X    if (i > 0) {
  1261. X        *sp-- = hextab[i & 0xf];
  1262. X        i >>= 4;
  1263. X    } else {
  1264. X        *sp-- = '$';
  1265. X    }
  1266. X    }
  1267. X    return suffix;
  1268. X}
  1269. X
  1270. X/*
  1271. X * Construct unique name for temporary file, to be used as a backup
  1272. X * file for the named file.
  1273. X */
  1274. Xchar *
  1275. Xtempfname(char *srcname)
  1276. X{
  1277. X    char    *srctail,
  1278. X        *srcdot,
  1279. X        *endp,
  1280. X        *retp;
  1281. X    unsigned    indexnum = 0;
  1282. X    unsigned    baselen;
  1283. X
  1284. X    srctail = srcdot = NULL;
  1285. X    endp = srcname;
  1286. X
  1287. X    while (*endp) {
  1288. X    switch (*endp++) {
  1289. X    case '\\':
  1290. X    case '/':
  1291. X        srctail = endp;
  1292. X        srcdot = (char*) 0;
  1293. X        continue;
  1294. X    case '.':
  1295. X        srcdot = endp - 1;
  1296. X    }
  1297. X    }
  1298. X    if (srctail == NULL) {
  1299. X    /*
  1300. X     * We haven't found any directory separators ('/' or '\\').
  1301. X     */
  1302. X    srctail = srcname;
  1303. X    /*
  1304. X     * Check to see if there's a disk drive name. If there
  1305. X     * is, skip over it.
  1306. X     */
  1307. X    if (*srcname && is_alpha(*srcname) && srcname[1] == ':')
  1308. X        srctail = &srcname[2];
  1309. X    }
  1310. X    /*
  1311. X     * There isn't a dot in the trailing part of the filename:
  1312. X     * just add it at the end.
  1313. X     */
  1314. X    if (srcdot == NULL)
  1315. X    srcdot = endp;
  1316. X    /*
  1317. X     * Don't make name too long.
  1318. X     */
  1319. X    if (srcdot - srctail > MAXNAMLEN - 4)
  1320. X    srcdot = srctail + MAXNAMLEN - 4;
  1321. X    if (srcdot - srcname > MAXPATHLEN - 4)
  1322. X    srcdot = srcname + MAXPATHLEN - 4;
  1323. X    baselen = srcdot - srcname;
  1324. X    /*
  1325. X     * Allocate space for new temporary file name ...
  1326. X     */
  1327. X    if ((retp = alloc(baselen + 5)) == (char*) 0)
  1328. X    return (char*) 0;
  1329. X    if (baselen > 0)
  1330. X    (void) memcpy(retp, srcname, baselen);
  1331. X    do {
  1332. X    /*
  1333. X     * Keep trying this until we get a unique file name.
  1334. X     */
  1335. X    strcpy(&retp[baselen], hexsuffix(indexnum++));
  1336. X    } while (exists(retp));
  1337. X    return retp;
  1338. X}
  1339. X
  1340. X/*
  1341. X * Fake out a pipe by writing output to temp file, running a process with
  1342. X * i/o redirected from this file to another temp file, and then reading
  1343. X * the second temp file back in.
  1344. X *
  1345. X * OS/2 does have real pipes, but I don't know how to avoid deadlock
  1346. X * when connecting concurrent processes with bidirectional pipes.
  1347. X */
  1348. Xbool_t
  1349. Xsys_pipe(cmd, writefunc, readfunc)
  1350. Xchar    *cmd;
  1351. Xint    (*writefunc) P((FILE *));
  1352. Xlong    (*readfunc) P((FILE *));
  1353. X{
  1354. X    char    *temp1;
  1355. X    FILE    *fp;
  1356. X    bool_t    retval;
  1357. X
  1358. X    /*
  1359. X     * Create first temporary file ...
  1360. X     */
  1361. X    if (
  1362. X    (temp1 = tempfname("xvi_out")) == NULL
  1363. X    ||
  1364. X    (fp = fopen(temp1, "w")) == NULL
  1365. X    ) {
  1366. X    retval = FALSE;
  1367. X    } else {
  1368. X    char    *temp2 = NULL;
  1369. X    int    savcon;
  1370. X    int    fd1 = -1,
  1371. X        fd2 = -1;
  1372. X
  1373. X    /*
  1374. X     * ... then write to it & close it ...
  1375. X     */
  1376. X    (void) (*writefunc)(fp);
  1377. X    (void) fclose(fp);
  1378. X
  1379. X    /*
  1380. X     * ... then re-open it for reading, open second one
  1381. X     * for writing & re-arrange file descriptors.
  1382. X     *
  1383. X     * Note that we assume that the editor's standard
  1384. X     * input, output & error files are the same device,
  1385. X     * since I can't imagine how any of them could
  1386. X     * usefully be redirected to anything else.
  1387. X     */
  1388. X
  1389. X#ifndef O_BINARY
  1390. X#    define O_BINARY 0
  1391. X#endif
  1392. X    if (
  1393. X        (savcon = dup(0)) < 3
  1394. X        ||
  1395. X        (fd1 = open(temp1, O_RDONLY | O_BINARY)) < 3
  1396. X        ||
  1397. X        (temp2 = tempfname("xvi_in")) == NULL 
  1398. X        ||
  1399. X        (fd2 = open(temp2,
  1400. X                O_WRONLY | O_CREAT | O_EXCL | O_BINARY, 0600)) < 3
  1401. X    ) {
  1402. X        retval = FALSE;
  1403. X    } else {
  1404. X        (void) dup2(fd1, 0);
  1405. X        (void) dup2(fd2, 1);
  1406. X        (void) dup2(fd2, 2);
  1407. X
  1408. X        (void) close(fd1);
  1409. X        (void) close(fd2);
  1410. X        fd1 = fd2 = -1;
  1411. X
  1412. X        /*
  1413. X         * Run the command.
  1414. X         */
  1415. X        (void) system(cmd);
  1416. X
  1417. X        /*
  1418. X         * Restore our standard input, output & error
  1419. X         * files.
  1420. X         */
  1421. X        (void) dup2(savcon, 0);
  1422. X        (void) dup2(savcon, 1);
  1423. X        (void) dup2(savcon, 2);
  1424. X
  1425. X        /*
  1426. X         * Now read from the second temporary file,
  1427. X         * close it, & we're done.
  1428. X         */
  1429. X        if ((fp = fopen(temp2, "r")) == NULL) {
  1430. X        retval = FALSE;
  1431. X        } else {
  1432. X        (void) (*readfunc)(fp);
  1433. X        (void) fclose(fp);
  1434. X        retval = TRUE;
  1435. X        }
  1436. X    }
  1437. X    /*
  1438. X     * Clean up.
  1439. X     */
  1440. X    if (temp2) {
  1441. X        (void) remove(temp2);
  1442. X        free(temp2);
  1443. X    }
  1444. X    if (savcon > 2)
  1445. X        (void) close(savcon);
  1446. X    if (fd1 > 2)
  1447. X        (void) close(fd1);
  1448. X    if (fd2 > 2)
  1449. X        (void) close(fd2);
  1450. X    }
  1451. X
  1452. X    if (temp1) {
  1453. X    (void) remove(temp1);
  1454. X    free(temp1);
  1455. X    }
  1456. X
  1457. X    return(retval);
  1458. X}
  1459. END_OF_FILE
  1460.   if test 18336 -ne `wc -c <'xvi/src/os2vio.c'`; then
  1461.     echo shar: \"'xvi/src/os2vio.c'\" unpacked with wrong size!
  1462.   fi
  1463.   # end of 'xvi/src/os2vio.c'
  1464. fi
  1465. echo shar: End of archive 5 \(of 18\).
  1466. cp /dev/null ark5isdone
  1467. MISSING=""
  1468. for I in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 ; do
  1469.     if test ! -f ark${I}isdone ; then
  1470.     MISSING="${MISSING} ${I}"
  1471.     fi
  1472. done
  1473. if test "${MISSING}" = "" ; then
  1474.     echo You have unpacked all 18 archives.
  1475.     rm -f ark[1-9]isdone ark[1-9][0-9]isdone
  1476. else
  1477.     echo You still must unpack the following archives:
  1478.     echo "        " ${MISSING}
  1479. fi
  1480. exit 0
  1481. exit 0 # Just in case...
  1482.