/*
*?File?Name:?jpegDe.c
*?Author:?576632108@qq.com?lucio
*?Date:?2014.11.5
*?Description:?analyze?the?head?info?of?jpeg
*/
#include?
#include?

typedef?unsigned?short?WORD;
typedef?unsigned?long?DWORD;
typedef?long?LONG;

int?main（int?argc?char?**argv）{
	FILE?*fp;
	WORD?window;?
	WORD?temp;
	int?i=0j=0k=0;
	int?found_count=0;
	int?mark_head=0xFF;
	int?mark_part[8]={0xD80xE00xDB0xDD0xC00xC40xDA0xD9};
	char?mark_str[8][10]={“SOI““APP0““DQT““DRI““SOF0““DHT““SOS““EOI“};
	int?headpart;
	int?temp_headtemp_part;
	int?done=0;
	fp=fopen（“KD.jpg““rb“）;
	if（fp==0）{
		printf（“Can?not?open?the?file?to?read.\n“）;
		return?-1;
	}
	while（?1?）{
		fseek（fpiSEEK_SET）;
		if（fread（&window21fp）!=1）{
			printf（“Can?not?read?the?info?of?the?info?header.\n“）;
			fclose（fp）;
			return?-1;
		}
		head=window-（window/0x100）*0x100;//靠前的部分是高位
		part=window/0x100;//靠后的部分是低位
		if（?head==mark_head?）{
			for?（?j=0;j<8;j++?）{
				if（?part==mark_part[j]?）{
					printf（“%s:?%X-%X\n“mark_str[j]headpart）;
					if（?j==1?）{//APP0
						//此處不需要fseek，因為讀的過程中指針移動
						//Lp
						if（fread（&temp21fp）!=1）{
							printf（“Can?not?read?the?info?of?the?info?header.\n“）;
							fclose（fp）;
							return?-1;
						}
						temp_head=temp-（temp/0x100）*0x100;
						temp_part=temp/0x100;
						temp=temp_head+temp_part;
						printf（“??Lp:?%d\n“temp）;
						//Identifier
						printf（“??Identifier:?“）;
						for（?k=0;k<3;k++?）{
							if（fread（&temp21fp）!=1）{
								printf（“Can?not?read?the?info?of?the?info?header.\n“）;
								fclose（fp）;
								return?-1;
							}
							temp_head=temp-（temp/0x100）*0x100;
							temp_part=temp/0x100;
							if（?k!=2?）	printf（“%02X-%02X-“temp_headtemp_part）;
							else?printf（“%02X“temp_head）;
						}
						printf（“\n“）;
						//Version
						fseek（fp-1SEEK_CUR）;
						if（fread（&temp21fp）!=1）{
							printf（“Can?not?read?the?info?of?the?info?header.\n“）;
							fclose（fp）;
							return?-1;
						}
						temp_head=temp-（temp/0x100）*0x100;
						temp_part=temp/0x100;
						temp=temp_head+temp_part;
						printf（“??Version:?%02X-%02X\n“temp_headtemp_part）;
						//Units
						if（fread（&temp11fp）!=1）{
							printf（“Can?not?read?the?info?of?the?info?header.\n“）;
							fclose（fp）;
							return?-1;
						}
						printf（“??Units:?%02X\n“temp）;
						//Xdensity
						if（fread（&temp21fp）!=1）{
							printf（“Can?not?read?the?info?of?the?info?header.\n“）;
							fclose（fp）;
							return?-1;
						}
						temp_head=temp-（temp/0x100）*0x100;
						temp_part=temp/0x100;
						temp=temp_head+temp_part;
						printf（“??Xdensity:?%d\n“temp）;
						//Ydensity
						if（fread（&temp21fp）!=1）{
							printf（“Can?not?read?the?info?of?the?info?header.\n“）;
							fclose（fp）;
							return?-1;
						}
						temp_head=temp-（temp/0x100）*0x100;
						temp_part=temp/0x100;
						temp=temp_head+temp_part;
						pr

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2014-11-19?11:48??jpegDe\
?????目錄???????????0??2014-11-02?19:07??jpegDe\Debug\
?????文件???????34304??2014-11-05?10:43??jpegDe\Debug\jpegDe.exe
?????文件??????496920??2014-11-05?10:43??jpegDe\Debug\jpegDe.ilk
?????文件??????461824??2014-11-05?10:43??jpegDe\Debug\jpegDe.pdb
?????目錄???????????0??2014-11-03?20:56??jpegDe\jpegDe\
?????文件?????2228224??2014-11-19?11:48??jpegDe\jpegDe.sdf
?????文件?????????885??2014-11-02?19:04??jpegDe\jpegDe.sln
?????文件???????22528??2014-11-19?11:48??jpegDe\jpegDe.v11.suo
?????目錄???????????0??2014-11-05?10:43??jpegDe\jpegDe\Debug\
?????文件?????????534??2014-11-05?10:43??jpegDe\jpegDe\Debug\cl.command.1.tlog
?????文件????????1060??2014-11-05?10:43??jpegDe\jpegDe\Debug\CL.read.1.tlog
?????文件?????????226??2014-11-05?10:43??jpegDe\jpegDe\Debug\CL.write.1.tlog
?????文件??????????48??2014-11-05?10:43??jpegDe\jpegDe\Debug\jpegDe.lastbuildstate
?????文件????????1497??2014-11-05?10:43??jpegDe\jpegDe\Debug\jpegDe.log
?????文件???????13912??2014-11-05?10:43??jpegDe\jpegDe\Debug\jpegDe.obj
?????文件???????????2??2014-11-05?10:43??jpegDe\jpegDe\Debug\link-cvtres.read.1.tlog
?????文件???????????2??2014-11-05?10:43??jpegDe\jpegDe\Debug\link-cvtres.write.1.tlog
?????文件???????????2??2014-11-05?10:43??jpegDe\jpegDe\Debug\link-rc.read.1.tlog
?????文件???????????2??2014-11-05?10:43??jpegDe\jpegDe\Debug\link-rc.write.1.tlog
?????文件?????????978??2014-11-05?10:43??jpegDe\jpegDe\Debug\link.command.1.tlog
?????文件????????2134??2014-11-05?10:43??jpegDe\jpegDe\Debug\link.read.1.tlog
?????文件?????????282??2014-11-05?10:43??jpegDe\jpegDe\Debug\link.write.1.tlog
?????文件???????27648??2014-11-05?10:43??jpegDe\jpegDe\Debug\vc110.idb
?????文件???????77824??2014-11-05?10:43??jpegDe\jpegDe\Debug\vc110.pdb
?????文件????????3587??2014-11-05?11:09??jpegDe\jpegDe\jpegDe.c
?????文件????????4006??2014-11-02?19:06??jpegDe\jpegDe\jpegDe.vcxproj
?????文件?????????942??2014-11-02?19:06??jpegDe\jpegDe\jpegDe.vcxproj.filters
?????文件???????16963??2013-11-09?16:12??jpegDe\jpegDe\KD.jpg
?????文件??????481537??2014-11-03?20:55??jpegDe\jpegDe\tiger.jpg