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att
GitHub Repository: att/ast
 Path: blob/master/src/lib/libast/string/fmtint.c
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/***********************************************************************

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*                                                                      *

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*               This software is part of the ast package               *

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*          Copyright (c) 1985-2011 AT&T Intellectual Property          *

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*                      and is licensed under the                       *

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*                 Eclipse Public License, Version 1.0                  *

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*                    by AT&T Intellectual Property                     *

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*                                                                      *

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*                A copy of the License is available at                 *

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*          http://www.eclipse.org/org/documents/epl-v10.html           *

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*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *

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*                                                                      *

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*              Information and Software Systems Research               *

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*                            AT&T Research                             *

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*                           Florham Park NJ                            *

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*                                                                      *

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*                 Glenn Fowler <[email protected]>                  *

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*                  David Korn <[email protected]>                   *

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*                   Phong Vo <[email protected]>                    *

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*                                                                      *

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***********************************************************************/

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#pragma prototyped

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/*

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 * format decimal integer

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 * David Korn

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 * AT&T Research

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 */

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#include	<ast.h>

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static const char table[]=

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{

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	"000001002003004005006007008009010011012013014015016017018019"

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	"020021022023024025026027028029030031032033034035036037038039"

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	"040041042043044045046047048049050051052053054055056057058059"

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	"060061062063064065066067068069070071072073074075076077078079"

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	"080081082083084085086087088089090091092093094095096097098099"

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	"100101102103104105106107108109110111112113114115116117118119"

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	"120121122123124125126127128129130131132133134135136137138139"

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	"140141142143144145146147148149150151152153154155156157158159"

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	"160161162163164165166167168169170171172173174175176177178179"

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	"180181182183184185186187188189190191192193194195196197198199"

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	"200201202203204205206207208209210211212213214215216217218219"

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	"220221222223224225226227228229230231232233234235236237238239"

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	"240241242243244245246247248249250251252253254255256257258259"

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	"260261262263264265266267268269270271272273274275276277278279"

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	"280281282283284285286287288289290291292293294295296297298299"

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	"300301302303304305306307308309310311312313314315316317318319"

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	"320321322323324325326327328329330331332333334335336337338339"

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	"340341342343344345346347348349350351352353354355356357358359"

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	"360361362363364365366367368369370371372373374375376377378379"

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	"380381382383384385386387388389390391392393394395396397398399"

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	"400401402403404405406407408409410411412413414415416417418419"

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	"420421422423424425426427428429430431432433434435436437438439"

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	"440441442443444445446447448449450451452453454455456457458459"

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	"460461462463464465466467468469470471472473474475476477478479"

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	"480481482483484485486487488489490491492493494495496497498499"

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	"500501502503504505506507508509510511512513514515516517518519"

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	"520521522523524525526527528529530531532533534535536537538539"

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	"540541542543544545546547548549550551552553554555556557558559"

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	"560561562563564565566567568569570571572573574575576577578579"

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	"580581582583584585586587588589590591592593594595596597598599"

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	"600601602603604605606607608609610611612613614615616617618619"

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	"620621622623624625626627628629630631632633634635636637638639"

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	"640641642643644645646647648649650651652653654655656657658659"

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	"660661662663664665666667668669670671672673674675676677678679"

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	"680681682683684685686687688689690691692693694695696697698699"

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	"700701702703704705706707708709710711712713714715716717718719"

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	"720721722723724725726727728729730731732733734735736737738739"

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	"740741742743744745746747748749750751752753754755756757758759"

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	"760761762763764765766767768769770771772773774775776777778779"

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	"780781782783784785786787788789790791792793794795796797798799"

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	"800801802803804805806807808809810811812813814815816817818819"

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	"820821822823824825826827828829830831832833834835836837838839"

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	"840841842843844845846847848849850851852853854855856857858859"

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	"860861862863864865866867868869870871872873874875876877878879"

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	"880881882883884885886887888889890891892893894895896897898899"

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	"900901902903904905906907908909910911912913914915916917918919"

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	"920921922923924925926927928929930931932933934935936937938939"

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	"940941942943944945946947948949950951952953954955956957958959"

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	"960961962963964965966967968969970971972973974975976977978979"

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	"980981982983984985986987988989990991992993994995996997998999"

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};

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char*

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fmtint(intmax_t ll, int unsign)

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{

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	char		*buff;

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	uintmax_t	n,m;

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	int		j=0,k=3*sizeof(ll);

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	if(unsign || ll>=0)

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		n = ll;

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	else

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	{

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		n = -ll;

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		j = 1;

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	}

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	if(n<10)

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	{

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		buff = fmtbuf(k=3);

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		buff[--k] = 0;

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		buff[--k] = '0' + n;

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		goto skip;

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	}

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	buff = fmtbuf(k);

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	buff[--k] = 0;

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	do

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	{

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		k -= 3;

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		if((m=n) >= 1000)

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			m = n%1000;

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		memcpy(buff+k,table+3*m,3);

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		n /= 1000;

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	}

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	while(n>0);

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	while(buff[k]=='0')

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		k++;

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skip:

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	if(j)

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		buff[--k] = '-';

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	return(&buff[k]);

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}

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