#include <stdio.h>#include <stdlib.h>#include <string.h>#include <time.h>#include <errno.h>#include <fcntl.h>#ifdef unix# include <unistd.h># include <utime.h>#else# include <direct.h># include <io.h>#endif#include "unzip.h"#define CASESENSITIVITY (0)#define WRITEBUFFERSIZE (8192)/*  mini unzip, demo of unzip package  usage :  Usage : miniunz [-exvlo] file.zip [file_to_extract]  list the file in the zipfile, and print the content of FILE_ID.ZIP or README.TXT    if it exists*//* change_file_date : change the date/time of a file    filename : the filename of the file where date/time must be modified    dosdate : the new date at the MSDos format (4 bytes)    tmu_date : the SAME new date at the tm_unz format */void change_file_date(filename,dosdate,tmu_date)	const char *filename;	uLong dosdate;	tm_unz tmu_date;{#ifdef WIN32  HANDLE hFile;  FILETIME ftm,ftLocal,ftCreate,ftLastAcc,ftLastWrite;  hFile = CreateFile(filename,GENERIC_READ | GENERIC_WRITE,                      0,NULL,OPEN_EXISTING,0,NULL);  GetFileTime(hFile,&ftCreate,&ftLastAcc,&ftLastWrite);  DosDateTimeToFileTime((WORD)(dosdate>>16),(WORD)dosdate,&ftLocal);  LocalFileTimeToFileTime(&ftLocal,&ftm);  SetFileTime(hFile,&ftm,&ftLastAcc,&ftm);  CloseHandle(hFile);#else#ifdef unix  struct utimbuf ut;  struct tm newdate;  newdate.tm_sec = tmu_date.tm_sec;  newdate.tm_min=tmu_date.tm_min;  newdate.tm_hour=tmu_date.tm_hour;  newdate.tm_mday=tmu_date.tm_mday;  newdate.tm_mon=tmu_date.tm_mon;  if (tmu_date.tm_year > 1900)      newdate.tm_year=tmu_date.tm_year - 1900;  else      newdate.tm_year=tmu_date.tm_year ;  newdate.tm_isdst=-1;  ut.actime=ut.modtime=mktime(&newdate);  utime(filename,&ut);#endif#endif}/* mymkdir and change_file_date are not 100 % portable   As I don't know well Unix, I wait feedback for the unix portion */int mymkdir(dirname)	const char* dirname;{    int ret=0;#ifdef WIN32	ret = mkdir(dirname);#else#ifdef unix	ret = mkdir (dirname,0775);#endif#endif	return ret;}int makedir (newdir)    char *newdir;{  char *buffer ;  char *p;  int  len = strlen(newdir);    if (len <= 0)     return 0;  buffer = (char*)malloc(len+1);  strcpy(buffer,newdir);    if (buffer[len-1] == '/') {    buffer[len-1] = '\0';  }  if (mymkdir(buffer) == 0)    {      free(buffer);      return 1;    }  p = buffer+1;  while (1)    {      char hold;      while(*p && *p != '\\' && *p != '/')        p++;      hold = *p;      *p = 0;      if ((mymkdir(buffer) == -1) && (errno == ENOENT))        {          printf("couldn't create directory %s\n",buffer);          free(buffer);          return 0;        }      if (hold == 0)        break;      *p++ = hold;    }  free(buffer);  return 1;}void do_banner(){	printf("MiniUnz 0.15, demo of zLib + Unz package written by Gilles Vollant\n");	printf("more info at http://wwww.winimage/zLibDll/unzip.htm\n\n");}void do_help(){		printf("Usage : miniunz [-exvlo] file.zip [file_to_extract]\n\n") ;}int do_list(uf)	unzFile uf;{	uLong i;	unz_global_info gi;	int err;	err = unzGetGlobalInfo (uf,&gi);	if (err!=UNZ_OK)		printf("error %d with zipfile in unzGetGlobalInfo \n",err);    printf(" Length  Method   Size  Ratio   Date    Time   CRC-32     Name\n");    printf(" ------  ------   ----  -----   ----    ----   ------     ----\n");	for (i=0;i<gi.number_entry;i++)	{		char filename_inzip[256];		unz_file_info file_info;		uLong ratio=0;		const char *string_method;		err = unzGetCurrentFileInfo(uf,&file_info,filename_inzip,sizeof(filename_inzip),NULL,0,NULL,0);		if (err!=UNZ_OK)		{			printf("error %d with zipfile in unzGetCurrentFileInfo\n",err);			break;		}		if (file_info.uncompressed_size>0)			ratio = (file_info.compressed_size*100)/file_info.uncompressed_size;		if (file_info.compression_method==0)			string_method="Stored";		else		if (file_info.compression_method==Z_DEFLATED)		{			uInt iLevel=(uInt)((file_info.flag & 0x6)/2);			if (iLevel==0)			  string_method="Defl:N";			else if (iLevel==1)			  string_method="Defl:X";			else if ((iLevel==2) || (iLevel==3))			  string_method="Defl:F"; /* 2:fast , 3 : extra fast*/		}		else			string_method="Unkn. ";		printf("%7lu  %6s %7lu %3lu%%  %2.2lu-%2.2lu-%2.2lu  %2.2lu:%2.2lu  %8.8lx   %s\n",			    file_info.uncompressed_size,string_method,file_info.compressed_size,				ratio,				(uLong)file_info.tmu_date.tm_mon + 1,                (uLong)file_info.tmu_date.tm_mday,				(uLong)file_info.tmu_date.tm_year % 100,				(uLong)file_info.tmu_date.tm_hour,(uLong)file_info.tmu_date.tm_min,				(uLong)file_info.crc,filename_inzip);		if ((i+1)<gi.number_entry)		{			err = unzGoToNextFile(uf);			if (err!=UNZ_OK)			{				printf("error %d with zipfile in unzGoToNextFile\n",err);				break;			}		}	}	return 0;}int do_extract_currentfile(uf,popt_extract_without_path,popt_overwrite)	unzFile uf;	const int* popt_extract_without_path;    int* popt_overwrite;{	char filename_inzip[256];	char* filename_withoutpath;	char* p;    int err=UNZ_OK;    FILE *fout=NULL;    void* buf;    uInt size_buf;		unz_file_info file_info;	uLong ratio=0;	err = unzGetCurrentFileInfo(uf,&file_info,filename_inzip,sizeof(filename_inzip),NULL,0,NULL,0);	if (err!=UNZ_OK)	{		printf("error %d with zipfile in unzGetCurrentFileInfo\n",err);		return err;	}    size_buf = WRITEBUFFERSIZE;    buf = (void*)malloc(size_buf);    if (buf==NULL)    {        printf("Error allocating memory\n");        return UNZ_INTERNALERROR;    }	p = filename_withoutpath = filename_inzip;	while ((*p) != '\0')	{		if (((*p)=='/') || ((*p)=='\\'))			filename_withoutpath = p+1;		p++;	}	if ((*filename_withoutpath)=='\0')	{		if ((*popt_extract_without_path)==0)		{			printf("creating directory: %s\n",filename_inzip);			mymkdir(filename_inzip);		}	}	else	{		const char* write_filename;		int skip=0;		if ((*popt_extract_without_path)==0)			write_filename = filename_inzip;		else			write_filename = filename_withoutpath;		err = unzOpenCurrentFile(uf);		if (err!=UNZ_OK)		{			printf("error %d with zipfile in unzOpenCurrentFile\n",err);		}		if (((*popt_overwrite)==0) && (err==UNZ_OK))		{			char rep;			FILE* ftestexist;			ftestexist = fopen(write_filename,"rb");			if (ftestexist!=NULL)			{				fclose(ftestexist);				do				{					char answer[128];					printf("The file %s exist. Overwrite ? [y]es, [n]o, [A]ll: ",write_filename);					scanf("%1s",answer);					rep = answer[0] ;					if ((rep>='a') && (rep<='z'))						rep -= 0x20;				}				while ((rep!='Y') && (rep!='N') && (rep!='A'));			}			if (rep == 'N')				skip = 1;			if (rep == 'A')				*popt_overwrite=1;		}		if ((skip==0) && (err==UNZ_OK))		{			fout=fopen(write_filename,"wb");            /* some zipfile don't contain directory alone before file */            if ((fout==NULL) && ((*popt_extract_without_path)==0) &&                                 (filename_withoutpath!=(char*)filename_inzip))            {                char c=*(filename_withoutpath-1);                *(filename_withoutpath-1)='\0';                makedir(write_filename);                *(filename_withoutpath-1)=c;                fout=fopen(write_filename,"wb");            }			if (fout==NULL)			{				printf("error opening %s\n",write_filename);			}		}		if (fout!=NULL)		{			printf(" extracting: %s\n",write_filename);			do			{				err = unzReadCurrentFile(uf,buf,size_buf);				if (err<0)					{					printf("error %d with zipfile in unzReadCurrentFile\n",err);					break;				}				if (err>0)					if (fwrite(buf,err,1,fout)!=1)					{						printf("error in writing extracted file\n");                        err=UNZ_ERRNO;						break;					}			}			while (err>0);			fclose(fout);			if (err==0) 				change_file_date(write_filename,file_info.dosDate,					             file_info.tmu_date);		}        if (err==UNZ_OK)        {		    err = unzCloseCurrentFile (uf);		    if (err!=UNZ_OK)		    {			    printf("error %d with zipfile in unzCloseCurrentFile\n",err);		    }        }        else            unzCloseCurrentFile(uf); /* don't lose the error */       	}    free(buf);        return err;}int do_extract(uf,opt_extract_without_path,opt_overwrite)	unzFile uf;	int opt_extract_without_path;    int opt_overwrite;{	uLong i;	unz_global_info gi;	int err;	FILE* fout=NULL;		err = unzGetGlobalInfo (uf,&gi);	if (err!=UNZ_OK)		printf("error %d with zipfile in unzGetGlobalInfo \n",err);	for (i=0;i<gi.number_entry;i++)	{        if (do_extract_currentfile(uf,&opt_extract_without_path,                                      &opt_overwrite) != UNZ_OK)            break;		if ((i+1)<gi.number_entry)		{			err = unzGoToNextFile(uf);			if (err!=UNZ_OK)			{				printf("error %d with zipfile in unzGoToNextFile\n",err);				break;			}		}	}	return 0;}int do_extract_onefile(uf,filename,opt_extract_without_path,opt_overwrite)	unzFile uf;	const char* filename;	int opt_extract_without_path;    int opt_overwrite;{    int err = UNZ_OK;    if (unzLocateFile(uf,filename,CASESENSITIVITY)!=UNZ_OK)    {        printf("file %s not found in the zipfile\n",filename);        return 2;    }    if (do_extract_currentfile(uf,&opt_extract_without_path,                                      &opt_overwrite) == UNZ_OK)        return 0;    else        return 1;}int main(argc,argv)	int argc;	char *argv[];{	const char *zipfilename=NULL;    const char *filename_to_extract=NULL;	int i;	int opt_do_list=0;	int opt_do_extract=1;	int opt_do_extract_withoutpath=0;	int opt_overwrite=0;	char filename_try[512];	unzFile uf=NULL;	do_banner();	if (argc==1)	{		do_help();		exit(0);	}	else	{		for (i=1;i<argc;i++)		{			if ((*argv[i])=='-')			{				const char *p=argv[i]+1;								while ((*p)!='\0')				{								char c=*(p++);;					if ((c=='l') || (c=='L'))						opt_do_list = 1;					if ((c=='v') || (c=='V'))						opt_do_list = 1;					if ((c=='x') || (c=='X'))						opt_do_extract = 1;					if ((c=='e') || (c=='E'))						opt_do_extract = opt_do_extract_withoutpath = 1;					if ((c=='o') || (c=='O'))						opt_overwrite=1;				}			}			else            {				if (zipfilename == NULL)					zipfilename = argv[i];                else if (filename_to_extract==NULL)                        filename_to_extract = argv[i] ;            }		}	}	if (zipfilename!=NULL)	{		strcpy(filename_try,zipfilename);		uf = unzOpen(zipfilename);		if (uf==NULL)		{			strcat(filename_try,".zip");			uf = unzOpen(filename_try);		}	}	if (uf==NULL)	{		printf("Cannot open %s or %s.zip\n",zipfilename,zipfilename);		exit (1);	}    printf("%s opened\n",filename_try);	if (opt_do_list==1)		return do_list(uf);	else if (opt_do_extract==1)    {        if (filename_to_extract == NULL)		    return do_extract(uf,opt_do_extract_withoutpath,opt_overwrite);        else            return do_extract_onefile(uf,filename_to_extract,                                      opt_do_extract_withoutpath,opt_overwrite);    }	unzCloseCurrentFile(uf);	return 0;  /* to avoid warning */}