/*
?*?cdjpeg.c
?*
?*?Copyright?（C）?1991-1997?Thomas?G.?Lane.
?*?This?file?is?part?of?the?Independent?JPEG?Group‘s?software.
?*?For?conditions?of?distribution?and?use?see?the?accompanying?README?file.
?*
?*?This?file?contains?common?support?routines?used?by?the?IJG?application
?*?programs?（cjpeg?djpeg?jpegtran）.
?*/

#include?“cdjpeg.h“		/*?Common?decls?for?cjpeg/djpeg?applications?*/
#include?		/*?to?declare?isupper（）?tolower（）?*/
#ifdef?NEED_SIGNAL_CATCHER
#include?		/*?to?declare?signal（）?*/
#endif
#ifdef?USE_SETMODE
#include?		/*?to?declare?setmode（）‘s?parameter?macros?*/
/*?If?you?have?setmode（）?but?not??just?delete?this?line:?*/
#include?			/*?to?declare?setmode（）?*/
#endif


/*
?*?Signal?catcher?to?ensure?that?temporary?files?are?removed?before?aborting.
?*?NB:?for?Amiga?Manx?C?this?is?actually?a?global?routine?named?_abort（）;
?*?we?put?“#define?signal_catcher?_abort“?in?jconfig.h.??Talk?about?bogus...
?*/

#ifdef?NEED_SIGNAL_CATCHER

static?j_common_ptr?sig_cinfo;

void				/*?must?be?global?for?Manx?C?*/
signal_catcher?（int?signum）
{
??if?（sig_cinfo?!=?NULL）?{
????if?（sig_cinfo->err?!=?NULL）?/*?turn?off?trace?output?*/
??????sig_cinfo->err->trace_level?=?0;
????jpeg_destroy（sig_cinfo）;	/*?clean?up?memory?allocation?&?temp?files?*/
??}
??exit（EXIT_FAILURE）;
}


GLOBAL（void）
enable_signal_catcher?（j_common_ptr?cinfo）
{
??sig_cinfo?=?cinfo;
#ifdef?SIGINT			/*?not?all?systems?have?SIGINT?*/
??signal（SIGINT?signal_catcher）;
#endif
#ifdef?SIGTERM			/*?not?all?systems?have?SIGTERM?*/
??signal（SIGTERM?signal_catcher）;
#endif
}

#endif


/*
?*?Optional?progress?monitor:?display?a?percent-done?figure?on?stderr.
?*/

#ifdef?PROGRESS_REPORT

METHODDEF（void）
progress_monitor?（j_common_ptr?cinfo）
{
??cd_progress_ptr?prog?=?（cd_progress_ptr）?cinfo->progress;
??int?total_passes?=?prog->pub.total_passes?+?prog->total_extra_passes;
??int?percent_done?=?（int）?（prog->pub.pass_counter*100L/prog->pub.pass_limit）;

??if?（percent_done?!=?prog->percent_done）?{
????prog->percent_done?=?percent_done;
????if?（total_passes?>?1）?{
??????fprintf（stderr?“\rPass?%d/%d:?%3d%%?“
	??????prog->pub.completed_passes?+?prog->completed_extra_passes?+?1
	??????total_passes?percent_done）;
????}?else?{
??????fprintf（stderr?“\r?%3d%%?“?percent_done）;
????}
????fflush（stderr）;
??}
}


GLOBAL（void）
start_progress_monitor?（j_common_ptr?cinfo?cd_progress_ptr?progress）
{
??/*?Enable?progress?display?unless?trace?output?is?on?*/
??if?（cinfo->err->trace_level?==?0）?{
????progress->pub.progress_monitor?=?progress_monitor;
????progress->completed_extra_passes?=?0;
????progress->total_extra_passes?=?0;
????progress->percent_done?=?-1;
????cinfo->progress?=?&progress->pub;
??}
}


GLOBAL（void）
end_progress_monitor?（j_common_ptr?cinfo）
{
??/*?Clear?away?progress?display?*/
??if?（cinfo->err->trace_level?==?0）?{
????fprintf（stderr?“\r????????????????\r“）;
????fflush（stderr）;
??}
}

#endif


/*
?*?Case-insensitive?matching?of?possibly-abbrevi