/*?alloca.c?--?allocate?automatically?reclaimed?memory
???（Mostly）?portable?public-domain?implementation?--?D?A?Gwyn

???This?implementation?of?the?PWB?library?alloca?function
???which?is?used?to?allocate?space?off?the?run-time?stack?so
???that?it?is?automatically?reclaimed?upon?procedure?exit
???was?inspired?by?discussions?with?J.?Q.?Johnson?of?Cornell.
???J.Otto?Tennant??contributed?the?Cray?support.

???There?are?some?preprocessor?constants?that?can
???be?defined?when?compiling?for?your?specific?system?for
???improved?efficiency;?however?the?defaults?should?be?okay.

???The?general?concept?of?this?implementation?is?to?keep
???track?of?all?alloca-allocated?blocks?and?reclaim?any
???that?are?found?to?be?deeper?in?the?stack?than?the?current
???invocation.??This?heuristic?does?not?reclaim?storage?as
???soon?as?it?becomes?invalid?but?it?will?do?so?eventually.

???As?a?special?case?alloca（0）?reclaims?storage?without
???allocating?any.??It?is?a?good?idea?to?use?alloca（0）?in
???your?main?control?loop?etc.?to?force?garbage?collection.??*/

#ifdef?HAVE_CONFIG_H
#include?
#endif

#ifdef?HAVE_STRING_H
#include?
#endif
#ifdef?HAVE_STDLIB_H
#include?
#endif

#ifdef?emacs
#include?“blockinput.h“
#endif

/*?If?compiling?with?GCC?2?this?file‘s?not?needed.??*/
#if?!defined?（__GNUC__）?||?__GNUC__?
/*?If?someone?has?defined?alloca?as?a?macro
???there?must?be?some?other?way?alloca?is?supposed?to?work.??*/
#ifndef?alloca

#ifdef?emacs
#ifdef?static
/*?actually?only?want?this?if?static?is?defined?as?““
???--?this?is?for?usg?in?which?emacs?must?undefine?static
???in?order?to?make?unexec?workable
???*/
#ifndef?STACK_DIRECTION
you
lose
--?must?know?STACK_DIRECTION?at?compile-time
#endif?/*?STACK_DIRECTION?undefined?*/
#endif?/*?static?*/
#endif?/*?emacs?*/

/*?If?your?stack?is?a?linked?list?of?frames?you?have?to
???provide?an?“address?metric“?ADDRESS_FUNCTION?macro.??*/

#if?defined?（CRAY）?&&?defined?（CRAY_STACKSEG_END）
long?i00afunc?（）;
#define?ADDRESS_FUNCTION（arg）?（char?*）?i00afunc?（&（arg））
#else
#define?ADDRESS_FUNCTION（arg）?&（arg）
#endif

#if?__STDC__
typedef?void?*pointer;
#else
typedef?char?*pointer;
#endif

#ifndef?NULL
#define	NULL	0
#endif

/*?Different?portions?of?Emacs?need?to?call?different?versions?of
???malloc.??The?Emacs?executable?needs?alloca?to?call?xmalloc?because
???ordinary?malloc?isn‘t?protected?from?input?signals.??On?the?other
???hand?the?utilities?in?lib-src?need?alloca?to?call?malloc;?some?of
???them?are?very?simple?and?don‘t?have?an?xmalloc?routine.

???Non-Emacs?programs?expect?this?to?call?use?xmalloc.

???Callers?below?should?use?malloc.??*/

#ifndef?emacs
#define?malloc?xmalloc
#endif
extern?pointer?malloc?（）;

/*?Define?STACK_DIRECTION?if?you?know?the?direction?of?stack
???growth?for?your?system;?otherwise?it?will?be?automatically
???deduced?at?run-time.

???STACK_DIRECTION?>?0

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件????????1907??1996-08-28?22:13??make-3.75\README
?????文件????????7902??1995-11-17?20:01??make-3.75\INSTALL
?????文件???????18321??1991-06-03?21:36??make-3.75\COPYING
?????文件??????144107??1996-08-28?22:11??make-3.75\ChangeLog
?????文件???????23071??1996-07-14?20:52??make-3.75\NEWS
?????文件???????94634??1996-07-26?01:35??make-3.75\configure
?????文件???????10532??1996-08-28?22:13??make-3.75\Makefile.in
?????文件????????3766??1996-07-20?10:30??make-3.75\configure.in
?????文件????????2467??1996-07-14?18:11??make-3.75\build.sh.in
?????文件?????????772??1996-05-09?18:06??make-3.75\mkinstalldirs
?????文件????????1685??1996-07-14?20:57??make-3.75\configh.dos
?????文件????????1389??1995-03-17?20:56??make-3.75\configure.bat
?????文件????????1952??1996-05-13?19:39??make-3.75\README.Amiga
?????文件????????7542??1996-05-09?19:02??make-3.75\config.ami
?????文件???????10691??1996-05-13?19:39??make-3.75\Makefile.ami
?????文件?????????208??1996-05-09?19:02??make-3.75\SCOPTIONS
?????文件????????8604??1996-05-13?19:38??make-3.75\SMakefile
?????文件????????2738??1996-05-13?19:38??make-3.75\amiga.c
?????文件?????????917??1996-05-13?19:40??make-3.75\amiga.h
?????文件?????????344??1996-05-09?19:02??make-3.75\make.lnk
?????文件????????8558??1996-07-20?12:06??make-3.75\config.h-vms
?????文件????????1383??1996-06-22?20:26??make-3.75\makefile.com
?????文件????????4241??1996-07-20?12:06??make-3.75\makefile.vms
?????文件????????2322??1996-07-20?12:06??make-3.75\readme.vms
?????文件?????????819??1996-03-20?14:57??make-3.75\vmsdir.h
?????文件????????5821??1996-07-26?00:56??make-3.75\vmsfunctions.c
?????文件???????16557??1996-07-20?12:06??make-3.75\vmsify.c
?????文件????????4223??1996-07-28?22:15??make-3.75\README.WIN32
?????文件???????16341??1996-05-15?20:14??make-3.75\build_w32.bat
?????文件????????7846??1996-05-14?22:03??make-3.75\config.h.WIN32
?????文件??????????40??1996-05-16?16:20??make-3.75\subproc.bat
............此處省略93個文件信息