- •Important Information
- •Warranty
- •Copyright
- •Trademarks
- •Organization of This Manual
- •Conventions Used in This Manual
- •Related Documentation
- •Customer Communication
- •Introduction
- •Classes of External Code
- •Supported Languages
- •Macintosh
- •Microsoft Windows 3.1
- •Microsoft Windows 95 and Windows NT
- •Solaris
- •Steps for Creating a CIN
- •1. Place the CIN on a Block Diagram
- •2. Add Input and Output Terminals to the CIN
- •Input-Output Terminals
- •Output-Only Terminals
- •3. Wire the Inputs and Outputs to the CIN
- •4. Create .c File
- •Special Macintosh Considerations
- •5. Compile the CIN Source Code
- •Macintosh
- •THINK C for 68K (Versions 5-7)
- •Symantec C++ 8.0 for Power Macintosh
- •Metrowerks CodeWarrior for 68K
- •Metrowerks CodeWarrior for Power Macintosh
- •Microsoft Windows 3.x
- •Watcom C Compiler
- •Microsoft Windows 95 and Windows NT
- •Microsoft SDK C/C++ Compiler
- •Visual C++ for Windows 95 or Windows NT
- •Solaris 1.x
- •Solaris 2.x
- •6. Load the CIN Object Code
- •LabVIEW Manager Routines
- •Online Reference
- •Pointers as Parameters
- •Debugging External Code
- •DbgPrintf
- •Debugging CINs Under Windows 95 and Windows NT
- •Debugging CINs Under Sun or Solaris
- •Debugging CINs Under HP-UX
- •Introduction
- •CIN .c File
- •How LabVIEW Passes Fixed Sized Data to CINs
- •Scalar Numerics
- •Scalar Booleans
- •Refnums
- •Clusters of Scalars
- •Return Value for CIN Routines
- •Examples with Scalars
- •1. Place the CIN on the Block Diagram
- •2. Add Two Input and Output Terminals to the CIN
- •3. Wire the Inputs and Outputs to the CIN
- •4. Create the CIN Source Code
- •5. Compile the CIN Source Code
- •Macintosh
- •THINK C for 68K and Symantec C++
- •Microsoft Windows 3.x
- •Watcom C Compiler
- •Microsoft Windows 95 and Windows NT
- •Microsoft SDK Compiler
- •Microsoft Visual C++ Compiler
- •Solaris 1.x, Solaris 2.x, and HP-UX
- •6. Load the CIN Object Code
- •Comparing Two Numbers, Producing a Boolean Scalar
- •How LabVIEW Passes Variably Sized Data to CINs
- •Alignment Considerations
- •Arrays and Strings
- •Paths (Path)
- •Clusters Containing Variably Sized Data
- •Resizing Arrays and Strings
- •SetCINArraySize
- •NumericArrayResize
- •Examples with Variably Sized Data
- •Concatenating Two Strings
- •Working with Clusters
- •CIN Routines
- •Data Spaces and Code Resources
- •CIN Routines: The Basic Case
- •Loading a VI
- •Unloading a VI
- •Loading a New Resource into the CIN
- •Compiling a VI
- •Running a VI
- •Saving a VI
- •Aborting a VI
- •Multiple References to the Same CIN
- •Reentrancy
- •Code Globals and CIN Data Space Globals
- •Examples
- •Using Code Globals
- •Using CIN Data Space Globals
- •Calling a Windows 3.1 Dynamic Link Library
- •Calling a 16-Bit DLL
- •1. Load the DLL
- •2. Get the address of the desired function
- •3. Describe the function
- •4. Call the function
- •Example: A CIN that Displays a Dialog Box
- •The Block Diagram
- •The CIN Code
- •Compiling the CIN
- •Optimization
- •Introduction
- •Creating Shared External Subroutines
- •External Subroutine
- •Macintosh
- •THINK C Compiler and CodeWarrior 68K Compiler
- •MPW Compiler
- •Solaris 1.x, Solaris 2.x, and HP-UX
- •Calling Code
- •Macintosh
- •THINK C Compiler
- •CodeWarrior 68K Compiler
- •MPW Compiler
- •Solaris 1.x, Solaris 2.x, and HP-UX
- •Simple Example
- •External Subroutine Example
- •Compiling the External Subroutine
- •Macintosh
- •THINK C Compiler and CodeWarrior 68K Compiler
- •MPW Compiler
- •Microsoft Windows 3.1
- •Watcom C Compiler
- •Microsoft Windows 95 and Windows NT
- •Solaris 1.x, Solaris 2.x, and HP-UX
- •Calling Code
- •Compiling the Calling Code
- •Macintosh
- •THINK C Compiler
- •CodeWarrior 68K Compiler
- •MPW Compiler
- •Microsoft Windows 3.1
- •Watcom C Compiler
- •Microsoft Windows 95 and Windows NT
- •Solaris 1.x, Solaris 2.x, and HP-UX
- •Introduction
- •Basic Data Types
- •Scalar Data Types
- •Booleans
- •Numerics
- •Complex Numbers
- •char Data Type
- •Dynamic Data Types
- •Arrays
- •Strings
- •C-Style Strings (CStr)
- •Pascal-Style Strings (PStr)
- •LabVIEW Strings (LStr)
- •Concatenated Pascal String (CPStr)
- •Paths (Path)
- •Memory-Related Types
- •Constants
- •Memory Manager
- •Memory Allocation
- •Static Memory Allocation
- •Dynamic Memory Allocation: Pointers and Handles
- •Memory Zones
- •Using Pointers and Handles
- •Simple Example
- •Reference to the Memory Manager
- •Memory Manager Data Structures
- •File Manager
- •Introduction
- •Identifying Files and Directories
- •Path Specifications
- •Conventional Path Specifications
- •Empty Path Specifications
- •LabVIEW Path Specification
- •File Descriptors
- •File Refnums
- •Support Manager
- •Allocating and Releasing Handles
- •Allocating and Releasing Pointers
- •Manipulating Properties of Handles
- •AZHLock
- •AZHPurge
- •AZHNoPurge
- •AZHUnlock
- •Memory Utilities
- •ClearMem
- •MoveBlock
- •SwapBlock
- •Handle and Pointer Verification
- •Memory Zone Utilities
- •File Manager Data Structures
- •File/Directory Information Record
- •File Type Record
- •Path Data Type
- •Permissions
- •Volume Information Record
- •File Manager Functions
- •Performing Basic File Operations
- •FCreate
- •FCreateAlways
- •FMClose
- •FMOpen
- •FMRead
- •FMWrite
- •Positioning the Current Position Mark
- •FMSeek
- •FMTell
- •Positioning the End-Of-File Mark
- •FGetEOF
- •FSetEOF
- •Flushing File Data to Disk
- •FFlush
- •FExists
- •FGetAccessRights
- •FGetInfo
- •FGetVolInfo
- •FSetAccessRights
- •FSetInfo
- •Getting Default Access Rights Information
- •FGetDefGroup
- •FListDir
- •FNewDir
- •Copying Files
- •FCopy
- •Moving and Deleting Files and Directories
- •FMove
- •FRemove
- •Locking a File Range
- •FLockOrUnlockRange
- •Matching Filenames with Patterns
- •FStrFitsPat
- •Creating Paths
- •FAddPath
- •FAppendName
- •FAppPath
- •FEmptyPath
- •FMakePath
- •FNotAPath
- •FRelPath
- •Disposing Paths
- •FDisposePath
- •Duplicating Paths
- •FPathCpy
- •FPathToPath
- •Extracting Information from a Path
- •FDepth
- •FDirName
- •FName
- •FNamePtr
- •FVolName
- •FArrToPath
- •FFlattenPath
- •FPathToArr
- •FPathToAZString
- •FPathToDSString
- •FStringToPath
- •FTextToPath
- •FUnFlattenPath
- •Comparing Paths
- •FIsAPath
- •FIsAPathOrNotAPath
- •FIsEmptyPath
- •FPathCmp
- •Determining a Path Type
- •FGetPathType
- •FIsAPathOfType
- •FSetPathType
- •Manipulating File Refnums
- •FDisposeRefNum
- •FIsARefNum
- •FNewRefNum
- •FRefNumToFD
- •FRefNumToPath
- •Byte Manipulation Operations
- •Mathematical Operations
- •For THINK C Users
- •RandomGen
- •String Manipulation
- •BlockCmp
- •CPStrCmp
- •CPStrIndex
- •CPStrInsert
- •CPStrRemove
- •CPStrReplace
- •CPStrSize
- •CToPStr
- •HexChar
- •IsAlpha
- •IsDigit
- •IsLower
- •IsUpper
- •LStrCmp
- •LToPStr
- •PPStrCaseCmp
- •PPStrCmp
- •PStrCaseCmp
- •PStrCat
- •PStrCmp
- •PStrCpy
- •PStrNCpy
- •PToCStr
- •PToLStr
- •StrCat
- •StrCmp
- •StrCpy
- •StrLen
- •StrNCaseCmp
- •StrNCmp
- •StrNCpy
- •ToLower
- •ToUpper
- •Utility Functions
- •BinSearch
- •QSort
- •Time Functions
- •ASCIITime
- •DateCString
- •DateToSecs
- •MilliSecs
- •SecsToDate
- •TimeCString
- •TimeInSecs
- •Microsoft Windows 3.1, Windows 95, and Windows NT
- •Macintosh
- •How do I debug my CIN?
- •Can LabVIEW be used to call a DLL in Windows?
- •Glossary
- •Index
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Chapter 8 Support Manager Functions |
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Parameter |
Type |
Description |
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s |
LStrPtr |
Pointer to a long Pascal string. |
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returns |
The number of characters in the long Pascal string. |
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LToPStr
syntax int32 LToPStr(lstrp, pstr);
LToPStr converts a long Pascal string to a Pascal string. If the long Pascal string is more than 255 characters, the function converts only the first 255 characters. This function works even if the pointers lstrp and pstr refer to the same memory location. The function assumes that pstr is large enough to contain lstrp.
Parameter |
Type |
Description |
lstrp |
LStrPtr |
Pointer to a long Pascal string. |
pstr |
PStr |
Pointer to a Pascal string. |
returns The length of the string, truncated to a maximum of 255 characters.
PPStrCaseCmp
syntax int32 PPStrCaseCmp(s1p, s2p);
PPStrCaseCmp is the same as PStrCaseCmp, except you pass the function handles to the string data instead of pointers. You can use PPStrCaseCmp to compare two Pascal strings lexically and determine whether one is less than, the same as, or greater than the other. This comparison ignores differences in case.
Parameter |
Type |
Description |
s1p |
PStr * |
Pointer to a Pascal string. |
s2p |
PStr * |
Pointer to a Pascal string. |
returns |
<0, 0, or >0 if s1 is less than, the same as, or greater than s2. Returns <0 if s1 |
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is an initial substring of s2. |
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PPStrCmp
syntax int32 PPStrCmp(s1p, s2p);
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Chapter 8 Support Manager Functions
PPStrCmp is the same as PStrCmp, except you pass the function handles to the string data instead of pointers. You can use PPStrCmp to compare two Pascal strings lexically and determine whether one is less than, the same as, or greater than the other. This comparison is case sensitive.
Parameter |
Type |
Description |
s1p |
PStr * |
Pointer to a Pascal string. |
s2p |
PStr * |
Pointer to a Pascal string. |
returns |
<0, 0, or >0 if s1 is less than, the same as, or greater than s2. Returns <0 if s1 |
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is an initial substring of s2. |
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PStrBuf |
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*Macro* |
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syntax |
uChar |
*PStrBuf(s); |
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PStrBuf returns the address of the string data of a Pascal string (that is, the address |
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following the length byte). |
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Parameter |
Type |
Description |
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s |
PStr |
Pointer to a Pascal string. |
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PStrCaseCmp |
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syntax |
int32 |
PStrCaseCmp(s1, s2); |
PStrCaseCmp lexically compares two Pascal strings to determine whether one is less than, the same as, or greater than the other. This comparison ignores differences in case.
Parameter |
Type |
Description |
s1 |
PStr |
Pointer to a Pascal string. |
s2 |
PStr |
Pointer to a Pascal string. |
returns |
<0, 0, or >0 if s1 is less than, the same as, or greater than s2. Returns <0 if s1 |
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is an initial substring of s2. |
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PStrCat
syntax int32
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Chapter 8 Support Manager Functions
PStrCat(s1, s2);
PStrCat concatenates a Pascal string, s2, to the end of another Pascal string, s1, and places the result in s1. This function assumes that s1 is large enough to contain the resulting string. If the resulting string is larger than 255 characters, then PStrCat limits the resulting string to 255 characters.
Parameter |
Type |
Description |
s1 |
PStr |
Pointer to a Pascal string. |
s2 |
PStr |
Pointer to a Pascal string. |
returns The length of the resulting string.
PStrCmp
syntax int32 PStrCmp(s1, s2);
PStrCmp lexically compares two Pascal strings to determine whether one is less than, the same as, or greater than the other. This comparison is case sensitive.
Parameter |
Type |
Description |
s1 |
PStr |
Pointer to a Pascal string. |
s2 |
PStr |
Pointer to a Pascal string. |
returns |
<0, 0, or >0 if s1 is less than, the same as, or greater than s2. Returns <0 if s1 |
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is an initial substring of s2. |
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PStrCpy
syntax PStr PStrCpy(dst, src);
PStrCpy copies the Pascal string src to the Pascal string dst. This function assumes that the destination string is large enough to contain the source string.
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Parameter |
Type |
Description |
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dst |
PStr |
Pointer to a Pascal string. |
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src |
PStr |
Pointer to a Pascal string. |
returns |
A copy of the destination Pascal string pointer. |
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Chapter 8 Support Manager Functions
PStrLen |
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*Macro* |
syntax |
uInt8 |
PStrLen(s); |
PStrLen returns the length of a Pascal string (that is, the value at the first byte at the specified address).
Parameter |
Type |
Description |
s |
PStr |
Pointer to a Pascal string. |
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PStrNCpy
syntax PStr PStrNCpy(dst, src, n);
PStrNCpy copies the Pascal string src to the Pascal string dst. If the source string is greater than n, the function copies only n bytes. This function assumes that the destination string is large enough to contain the source string.
Parameter |
Type |
Description |
dst |
PStr |
Pointer to a Pascal string. |
src |
PStr |
Pointer to a Pascal string. |
n |
int32 |
Maximum number of bytes to copy including the |
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length byte. |
returns A copy of the destination Pascal string pointer.
PToCStr
syntax int32 PToCStr(pstr, cstr);
PToCStr converts a Pascal string to a C string. This function works even if the pointers pstr and cstr refer to the same memory location. This function assumes that cstr is large enough to contain pstr.
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Parameter |
Type |
Description |
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pstr |
PStr |
Pointer to a Pascal string. |
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cstr |
CStr |
Pointer to a C string. |
returns |
The length of the string. |
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© National Instruments Corporation |