Strange wxGTK behavior (was Re: wxDateTime (time_t) Save/Load)
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From: Igor Korot on 17 Apr 2008 18:17 Hi, ALL, I have following code in my program: wxDateTime t = Now(); #if wxUSE_STD_IOSTREAM (wxSTD ostream) stream << t.GetTicks(); #endif The stream is based on the file on hard drive. When I look at the file I don't see anything saved. What is the problem? Am I using this wrong? Thank you. -----Original Message----- >From: Hans Harmon <hans_harmon(a)yahoo.com> >Sent: Mar 19, 2008 11:00 AM >To: wx-users(a)lists.wxwidgets.org >Subject: Re: wxDateTime (time_t) Save/Load > >Yes that should work. >Typically I use typedef's for the 64 bit integers. I >do embedded as well as desktop code. So it looks more >like (needs endian checks): > >time_t now; > >#ifdef __HAS_INT64__ >sint64 value; >#else >sint32 value; >sint32 zero; > >zero = 0; >#endif > >value = (sint64) now; >#ifdef __HAS_INT64__ >write ( value, sizeof ( sint64 )); >#else >write ( zero, sizeof ( sint32 )); >write ( value, sizeof ( sint32 )); >#endif > > >So #if's because I am never sure of what hardware I am >on, but the idea is the same. > > >Hans > >--- Igor Korot <ikorot(a)earthlink.net> wrote: > > >--------------------------------- >body{font-family: >Geneva,Arial,Helvetica,sans-serif;font-size:9pt;background-color: >#ffffff;color: black;} >Hans, > >You mean something like this: > > > >time_t now; > >UInt 64 value; > >value = wxDynamicCast( now, UInt64 ); > >if( value ) > > // 64-bit save > >else > > // 32-bit save > > > >Thank you. > > > >-----Original Message----- >From: Hans Harmon >Sent: Mar 18, 2008 6:05 AM >To: wx-users(a)lists.wxwidgets.org >Subject: Re: wxDateTime (time_t) Save/Load > >time_t is changes, depending on OS and compilier. >This makes saving it very frustrating. I had code >that worked in MSVC 2003 only to have it break in 2005 >because time_t went from a 32 bit to 64. My >recommendation is to cast it to 64 bit if available, >and always write it as such. If the system does not >have 64 bit integers then just write a blank 32 bit as >a spacer so that it can be read in wherever you take >the code. > >Hans > > >Igor Korot <ikorot(a)earthlink.net> wrote:Hi, ALL, >I just looked at the wxDataOutputStream. It has only >Write8/16/32/64 functions. >However, at least on MSW time_t is 'long integer'. > >1. Is it safe to assume time_t is 'long integer' on >all platform? >2. Does this mean I need to make my own function? > >Thank you. > >--------------------------------------------------------------------- >To unsubscribe, e-mail: >wx-users-unsubscribe(a)lists.wxwidgets.org >For additional commands, e-mail: >wx-users-help(a)lists.wxwidgets.org > > > > >--------------------------------- >Be a better friend, newshound, and know-it-all with >Yahoo! Mobile. Try it >now.---------------------------------------------------------------------To >unsubscribe, e-mail: >wx-users-unsubscribe(a)lists.wxwidgets.orgFor additional >commands, e-mail: wx-users-help(a)lists.wxwidgets.org > > > > ____________________________________________________________________________________ >Looking for last minute shopping deals? >Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping > >--------------------------------------------------------------------- >To unsubscribe, e-mail: wx-users-unsubscribe(a)lists.wxwidgets.org >For additional commands, e-mail: wx-users-help(a)lists.wxwidgets.org >
From: Armel on 19 Apr 2008 15:24 "Igor Korot" <ikorot(a)earthlink.net> a �crit dans le message de news: mailman.19.1208470677.17602.wx-users(a)lists.wxwidgets.org... > Hi, ALL, > I have following code in my program: > > wxDateTime t = Now(); > #if wxUSE_STD_IOSTREAM > (wxSTD ostream) stream << t.GetTicks(); > #endif this cast is a bit strange... from a pure C++ point of view, it means 'build a wxSTD ostream' __value__ out of 'stream' and do '<< t.GetTicks( )' on it, then get rid of that 'wxSTD ostream' temporary value. could it be the problem? > The stream is based on the file on hard drive. > When I look at the file I don't see anything saved. > > What is the problem? Am I using this wrong? > > Thank you. Hope it helps Armel > > > -----Original Message----- >>From: Hans Harmon <hans_harmon(a)yahoo.com> >>Sent: Mar 19, 2008 11:00 AM >>To: wx-users(a)lists.wxwidgets.org >>Subject: Re: wxDateTime (time_t) Save/Load >> >>Yes that should work. >>Typically I use typedef's for the 64 bit integers. I >>do embedded as well as desktop code. So it looks more >>like (needs endian checks): >> >>time_t now; >> >>#ifdef __HAS_INT64__ >>sint64 value; >>#else >>sint32 value; >>sint32 zero; >> >>zero = 0; >>#endif >> >>value = (sint64) now; >>#ifdef __HAS_INT64__ >>write ( value, sizeof ( sint64 )); >>#else >>write ( zero, sizeof ( sint32 )); >>write ( value, sizeof ( sint32 )); >>#endif >> >> >>So #if's because I am never sure of what hardware I am >>on, but the idea is the same. >> >> >>Hans >> >>--- Igor Korot <ikorot(a)earthlink.net> wrote: >> >> >>--------------------------------- >>body{font-family: >>Geneva,Arial,Helvetica,sans-serif;font-size:9pt;background-color: >>#ffffff;color: black;} >>Hans, >> >>You mean something like this: >> >> >> >>time_t now; >> >>UInt 64 value; >> >>value = wxDynamicCast( now, UInt64 ); >> >>if( value ) >> >> // 64-bit save >> >>else >> >> // 32-bit save >> >> >> >>Thank you. >> >> >> >>-----Original Message----- >>From: Hans Harmon >>Sent: Mar 18, 2008 6:05 AM >>To: wx-users(a)lists.wxwidgets.org >>Subject: Re: wxDateTime (time_t) Save/Load >> >>time_t is changes, depending on OS and compilier. >>This makes saving it very frustrating. I had code >>that worked in MSVC 2003 only to have it break in 2005 >>because time_t went from a 32 bit to 64. My >>recommendation is to cast it to 64 bit if available, >>and always write it as such. If the system does not >>have 64 bit integers then just write a blank 32 bit as >>a spacer so that it can be read in wherever you take >>the code. >> >>Hans >> >> >>Igor Korot <ikorot(a)earthlink.net> wrote:Hi, ALL, >>I just looked at the wxDataOutputStream. It has only >>Write8/16/32/64 functions. >>However, at least on MSW time_t is 'long integer'. >> >>1. Is it safe to assume time_t is 'long integer' on >>all platform? >>2. Does this mean I need to make my own function? >> >>Thank you. >> >>--------------------------------------------------------------------- >>To unsubscribe, e-mail: >>wx-users-unsubscribe(a)lists.wxwidgets.org >>For additional commands, e-mail: >>wx-users-help(a)lists.wxwidgets.org >> >> >> >> >>--------------------------------- >>Be a better friend, newshound, and know-it-all with >>Yahoo! Mobile. Try it >>now.---------------------------------------------------------------------To >>unsubscribe, e-mail: >>wx-users-unsubscribe(a)lists.wxwidgets.orgFor additional >>commands, e-mail: wx-users-help(a)lists.wxwidgets.org >> >> >> >> >> ____________________________________________________________________________________ >>Looking for last minute shopping deals? >>Find them fast with Yahoo! Search. >>http://tools.search.yahoo.com/newsearch/category.php?category=shopping >> >>--------------------------------------------------------------------- >>To unsubscribe, e-mail: wx-users-unsubscribe(a)lists.wxwidgets.org >>For additional commands, e-mail: wx-users-help(a)lists.wxwidgets.org >> >
From: Igor Korot on 20 Apr 2008 00:39 Well, I guess I owe you an apology. There is 2 ways of doing this stuff: one through the wxFFileOutputStream and one through the wxSTD ostream. The thing is: the former works fine and the latter does not. But in order to differentiate between those 2 I use the code in parenthesis.. Unless I shouldn't create a 'stream' variable with the 'wxSTD ostream' type.... Again, sorry for the confusion. Thank you. -----Original Message----- >From: Armel <armelasselin(a)hotmail.com> >Sent: Apr 19, 2008 12:24 PM >To: wx-users(a)lists.wxwidgets.org >Subject: Re: Strange wxGTK behavior (was Re: wxDateTime (time_t) Save/Load) > > > > >"Igor Korot" <ikorot(a)earthlink.net> a écrit dans le message de news: >mailman.19.1208470677.17602.wx-users(a)lists.wxwidgets.org... >> Hi, ALL, >> I have following code in my program: >> >> wxDateTime t = Now(); >> #if wxUSE_STD_IOSTREAM >> (wxSTD ostream) stream << t.GetTicks(); >> #endif >this cast is a bit strange... from a pure C++ point of view, it means 'build >a wxSTD ostream' __value__ out of 'stream' and do '<< t.GetTicks( )' on it, >then get rid of that 'wxSTD ostream' temporary value. could it be the >problem? > >> The stream is based on the file on hard drive. >> When I look at the file I don't see anything saved. >> >> What is the problem? Am I using this wrong? >> >> Thank you. >Hope it helps > >Armel >> >> >> -----Original Message----- >>>From: Hans Harmon <hans_harmon(a)yahoo.com> >>>Sent: Mar 19, 2008 11:00 AM >>>To: wx-users(a)lists.wxwidgets.org >>>Subject: Re: wxDateTime (time_t) Save/Load >>> >>>Yes that should work. >>>Typically I use typedef's for the 64 bit integers. I >>>do embedded as well as desktop code. So it looks more >>>like (needs endian checks): >>> >>>time_t now; >>> >>>#ifdef __HAS_INT64__ >>>sint64 value; >>>#else >>>sint32 value; >>>sint32 zero; >>> >>>zero = 0; >>>#endif >>> >>>value = (sint64) now; >>>#ifdef __HAS_INT64__ >>>write ( value, sizeof ( sint64 )); >>>#else >>>write ( zero, sizeof ( sint32 )); >>>write ( value, sizeof ( sint32 )); >>>#endif >>> >>> >>>So #if's because I am never sure of what hardware I am >>>on, but the idea is the same. >>> >>> >>>Hans >>> >>>--- Igor Korot <ikorot(a)earthlink.net> wrote: >>> >>> >>>--------------------------------- >>>body{font-family: >>>Geneva,Arial,Helvetica,sans-serif;font-size:9pt;background-color: >>>#ffffff;color: black;} >>>Hans, >>> >>>You mean something like this: >>> >>> >>> >>>time_t now; >>> >>>UInt 64 value; >>> >>>value = wxDynamicCast( now, UInt64 ); >>> >>>if( value ) >>> >>> // 64-bit save >>> >>>else >>> >>> // 32-bit save >>> >>> >>> >>>Thank you. >>> >>> >>> >>>-----Original Message----- >>>From: Hans Harmon >>>Sent: Mar 18, 2008 6:05 AM >>>To: wx-users(a)lists.wxwidgets.org >>>Subject: Re: wxDateTime (time_t) Save/Load >>> >>>time_t is changes, depending on OS and compilier. >>>This makes saving it very frustrating. I had code >>>that worked in MSVC 2003 only to have it break in 2005 >>>because time_t went from a 32 bit to 64. My >>>recommendation is to cast it to 64 bit if available, >>>and always write it as such. If the system does not >>>have 64 bit integers then just write a blank 32 bit as >>>a spacer so that it can be read in wherever you take >>>the code. >>> >>>Hans >>> >>> >>>Igor Korot <ikorot(a)earthlink.net> wrote:Hi, ALL, >>>I just looked at the wxDataOutputStream. It has only >>>Write8/16/32/64 functions. >>>However, at least on MSW time_t is 'long integer'. >>> >>>1. Is it safe to assume time_t is 'long integer' on >>>all platform? >>>2. Does this mean I need to make my own function? >>> >>>Thank you. >>> >>>--------------------------------------------------------------------- >>>To unsubscribe, e-mail: >>>wx-users-unsubscribe(a)lists.wxwidgets.org >>>For additional commands, e-mail: >>>wx-users-help(a)lists.wxwidgets.org >>> >>> >>> >>> >>>--------------------------------- >>>Be a better friend, newshound, and know-it-all with >>>Yahoo! Mobile. Try it >>>now.---------------------------------------------------------------------To >>>unsubscribe, e-mail: >>>wx-users-unsubscribe(a)lists.wxwidgets.orgFor additional >>>commands, e-mail: wx-users-help(a)lists.wxwidgets.org >>> >>> >>> >>> >>> ____________________________________________________________________________________ >>>Looking for last minute shopping deals? >>>Find them fast with Yahoo! Search. >>>http://tools.search.yahoo.com/newsearch/category.php?category=shopping >>> >>>--------------------------------------------------------------------- >>>To unsubscribe, e-mail: wx-users-unsubscribe(a)lists.wxwidgets.org >>>For additional commands, e-mail: wx-users-help(a)lists.wxwidgets.org >>> >> > > >_______________________________________________ >wx-users mailing list >wx-users(a)lists.wxwidgets.org >http://lists.wxwidgets.org/mailman/listinfo/wx-users
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