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Questions tagged [pchar]

33 questions
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Delphi - Problem With Set String and PAnsiChar and Other Strings not Displaying

I was getting advice from Rob Kennedy and one of his suggestions that greatly increased the speed of an app I was working on was to use SetString and then load it into the VCL component that displayed it. I'm using Delphi 2009 so now that PChar is…
Brian Holloway
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Delphi DLL PChar

This limitation for sharedMemory is actual ? I have passed to DLL string length around 370 chars and DLL read it without problem. I am asking, because I return PChar from DLL to EXE program. In DLL I use GetMem() function, and in EXE program I used…
InnerWorld
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Why it's not allowed to print the content of PChar as a pointer

I have the following program. var a: PChar := PChar('abc'); ShowMessage(Format('%p - %p', [@a, a])); When I run it, I got this error: Project Project1.exe raised exception class EConvertError with message 'Format '%p - %p' invalid or incompatible…
Fajela Tajkiya
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How can I convert a PCHAR* to a TCHAR*?

I am looking for ways to convert a PCHAR* variable to a TCHAR* without having any warnings in Visual Studio( this is a requirement)? Looking online I can't find a function or a method to do so without having warnings. Maybe somebody has come across…
Ioana
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How to determine throughput/bandwidth from a file captured

I need to determine the throughput available between TCP client/server based on a packet capture. I would be very grateful if someone would indicate a script or tool that allows me to extract the throughput or network bandwidth from a pcap file and…
Laura
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How can i use PChars correctly to improve this optimization?

I have a function that is called heavily in my app. It is basically a csv parser, which 'pops' the first value off and changes the input string to the remaining string. function StripString(mask: string; var modifiedstring: string): string; var …
Simon
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Call VisualBasic DLL in C# works but how to replace a Pchar?

i have an old DLL written in VisualBasic and need to call the functions in C#. 14 of the 15 functions a already running (Tested with console project). The remaining function has a paramater PChar where i dont know how to call it in C#. A working…
Thomas Mann
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delphi modify pchar at runtime

I need to modify pchar string at runtime. Help me with this code: var s:pChar; begin s:='123123'; s[0]:=#32; // SO HERE I HAVE EXCEPTION !!! end. Now i have exception in Delphi 7 ! My project is not using native pascal strings (no any…
Vadim Kaplan
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What's the correct way to assign PAnsiChar to a (unicode-) string?

I have got a DLL function that returns a pointer to ANSI text (PAnsiChar). I want to assign this to a (unicode-) string (This is Delphi XE2.). The following compiles but I get a warning "W1057 Implicit String cast from 'AnsiChar' to…
dummzeuch
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What have I missed in this custom format copy and paste?

My copy code: if OpenClipboard(mainwnd.Handle) then MemHandle := GlobalAlloc(GHND or GMEM_SHARE, Succ(StrLen(pLclCopies))); if MemHandle <> 0 Then Begin try StrCopy(GlobalLock(MemHandle), pLclCopies); GlobalUnlock(MemHandle); …
Chucky
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How to create and edit a global PCHAR without any memory leak

This might seem like a basic question, but I can't find a solution anywhere. I have to get Information out of a kernel mode. Therefore i work with an IOCTL. My User-Mode-Applications sends this IOCTL using DeviceIoControl with METHOD_OUT_DIRECT…
plomox
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Calling external dll with array of pchar as parameter in XE

I have a delphi project that works fine in delphi 6, but when I upgraded to XE it does not work. I know it has to do with the new unicode type in delphi XE, I have tried changing the definition of the parameter from pchar to pansichar, ansichar but…
Mario Villada
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Pass vector* to function getnameinfo

how it is possible to pass variable of type vector* into getnameinfo function of winsock2? GetSocketIPAndPort( struct sockaddr* ss, vector* pIP, uint16_t* nPort ) { if (status =…
Benyamin Jane
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get PChar argument back from Delphi DLL in my Python script

Let say that I've this function in a DLL function test_3(sInput, sOutput : PChar; sSize : int64): Integer; stdcall; var sTmp : string; fText : TextFile; begin sTmp := '+++ ' + sInput + ' +++'; StrPLCopy(sOutput, PChar(sTmp), sSize); Result…
Jean-Philippe
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How to pass a string containing a file path from C# to a function in a Pascal DLL requiring a PChar argument?

How can I pass a string containing a file path from C# to a function in a Pascal DLL requiring a PChar argument? The Pascal DLL has a "FileExists" call that checks if the Argument (AFile: PChar) exists as a file. I've imported the dll succesfully…
The Agony
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