/*
?*?This?file?is?part?of?FFmpeg.
?*
?*?FFmpeg?is?free?software;?you?can?redistribute?it?and/or
?*?modify?it?under?the?terms?of?the?GNU?Lesser?General?Public
?*?License?as?published?by?the?Free?Software?Foundation;?either
?*?version?2.1?of?the?License?or?（at?your?option）?any?later?version.
?*
?*?FFmpeg?is?distributed?in?the?hope?that?it?will?be?useful
?*?but?WITHOUT?ANY?WARRANTY;?without?even?the?implied?warranty?of
?*?MERCHANTABILITY?or?FITNESS?FOR?A?PARTICULAR?PURPOSE.??See?the?GNU
?*?Lesser?General?Public?License?for?more?details.
?*
?*?You?should?have?received?a?copy?of?the?GNU?Lesser?General?Public
?*?License?along?with?FFmpeg;?if?not?write?to?the?Free?Software
?*?Foundation?Inc.?51?Franklin?Street?Fifth?Floor?Boston?MA?02110-1301?USA
?*/

/*
?*?This?file?was?copied?from?the?following?newsgroup?posting:
?*
?*?Newsgroups:?mod.std.unix
?*?Subject:?public?domain?AT&T?getopt?source
?*?Date:?3?Nov?85?19:34:15?GMT
?*
?*?Here‘s?something?you‘ve?all?been?waiting?for:??the?AT&T?public?domain
?*?source?for?getopt（3）.??It?is?the?code?which?was?given?out?at?the?1985
?*?UNIFORUM?conference?in?Dallas.??I?obtained?it?by?electronic?mail
?*?directly?from?AT&T.??The?people?there?assure?me?that?it?is?indeed
?*?in?the?public?domain.
?*/

#include?
#include?

static?int?opterr?=?1;
static?int?optind?=?1;
static?int?optopt;
static?char?*optarg;

static?int?getopt（int?argc?char?*argv[]?char?*opts）
{
????static?int?sp?=?1;
????int?c;
????char?*cp;

????if?（sp?==?1）?{
????????if?（optind?>=?argc?||
????????????argv[optind][0]?!=?‘-‘?||?argv[optind][1]?==?‘\0‘）
????????????return?EOF;
????????else?if?（!strcmp（argv[optind]?“--“））?{
????????????optind++;
????????????return?EOF;
????????}
????}
????optopt?=?c?=?argv[optind][sp];
????if?（c?==?‘:‘?||?!（cp?=?strchr（opts?c）））?{
????????fprintf（stderr?“:?illegal?option?--?%c\n“?c）;
????????if?（argv[optind][++sp]?==?‘\0‘）?{
????????????optind++;
????????????sp?=?1;
????????}
????????return?‘?‘;
????}
????if?（*++cp?==?‘:‘）?{
????????if?（argv[optind][sp+1]?!=?‘\0‘）
????????????optarg?=?&argv[optind++][sp+1];
????????else?if（++optind?>=?argc）?{
????????????fprintf（stderr?“:?option?requires?an?argument?--?%c\n“?c）;
????????????sp?=?1;
????????????return?‘?‘;
????????}?else
????????????optarg?=?argv[optind++];
????????sp?=?1;
????}?else?{
????????if?（argv[optind][++sp]?==?‘\0‘）?{
????????????sp?=?1;
????????????optind++;
????????}
????????optarg?=?NULL;
????}

????return?c;
}