Tcl Reference Manual: Contents

General

• Tcl - Tool Command Language
• tclvars - Variables used by Tcl
• Safe Tcl - Creating and manipulating safe interpreters
• library - standard library of Tcl procedures
• filename - File name conventions supported by Tcl commands
• expr - Evaluate an expression
• mathop - Mathematical operators as Tcl commands
• mathfunc - Mathematical functions for Tcl expressions
• tclsh - Simple shell containing Tcl interpreter
• tcltest - Test harness support code and utilities

Tcl Built-In Commands

• String Handling
  • string - Manipulate strings
  • subst - Perform backslash, command, and variable substitutions
  • regexp - Match a regular expression against a string
  • regsub - Perform substitutions based on regular expression pattern matching
  • re_syntax - Syntax of Tcl regular expressions
  • scan - Parse string using conversion specifiers in the style of sscanf
  • format - Format a string in the style of sprintf
  • binary - Insert and extract fields from binary strings
  • prefix - facilities for prefix matching
• List Handling
  • list - Create a list
  • split - Split a string into a proper Tcl list
  • join - Create a string by joining together list elements
  • concat - Join lists together
  • llength - Count the number of elements in a list
  • lindex - Retrieve an element from a list
  • lrange - Return one or more adjacent elements from a list
  • linsert - Insert elements into a list
  • lreplace - Replace elements in a list with new elements
  • lsort - Sort the elements of a list
  • lsearch - See if a list contains a particular element
  • lrepeat - Build a list by repeating elements
  • lreverse - Reverse the order of a list
  • dict - Manipulate dictionaries
• Control Constructs
  • if - Execute scripts conditionally
  • for - 'For' loop
  • foreach - Iterate over all elements in one or more lists
  • switch - Evaluate one of several scripts, depending on a given value
  • case - Evaluate one of several scripts, depending on a given value
  • while - Execute script repeatedly as long as a condition is met
  • continue - Skip to the next iteration of a loop
  • break - Abort looping command
  • return - Return from a procedure, or set return code of a script
  • catch - Evaluate script and trap exceptional returns
  • try - Trap and process errors and exceptions
  • throw - Generate a machine-readable error
  • error - Generate an error
  • eval - Evaluate a Tcl script
  • uplevel - Execute a script in a different stack frame
  • apply - Apply an anonymous function
  • coroutine - Create and produce values from coroutines
  • tailcall - Replace the current procedure with another command
  • after - Execute a command after a time delay
  • update - Process pending events and idle callbacks
  • vwait - Process events until a variable is written
• Variables and Procedures
  • proc - Create a Tcl procedure
  • rename - Rename or delete a command
  • set - Read and write variables
  • unset - Delete variables
  • array - Manipulate array variables
  • namespace - create and manipulate contexts for commands and variables
  • variable - create and initialize a namespace variable
  • upvar - Create link to variable in a different stack frame
  • global - Access global variables
  • trace - Monitor variable accesses, command usages and command executions
  • append - Append to variable
  • incr - Increment the value of a variable
  • lappend - Append list elements onto a variable
  • lset - Change an element in a list
  • lassign - Assign list elements to variables
• Input/Output
  • file - Manipulate file names and attributes
  • chan - Read, write and manipulate channels
  • open - Open a file-based or command pipeline channel
  • close - Close an open channel
  • socket - Open a TCP network connection
  • fconfigure - Set and get options on a channel
  • gets - Read a line from a channel
  • puts - Write to a channel
  • read - Read from a channel
  • seek - Change the access position for an open channel
  • tell - Return current access position for an open channel
  • eof - Check for end of file condition on channel
  • flush - Flush buffered output for a channel
  • fblocked - Test whether the last input operation exhausted all available input
  • fcopy - Copy data from one channel to another
  • fileevent - Execute a script when a channel becomes readable or writable
  • refchan - command handler API of reflected channels
  • transchan - command handler API of channel transforms
• OO System
  • define - define and configure classes and objects
  • object - root class of the class hierarchy
  • class - class of all classes
  • my - invoke any method of current object
  • self - method call internal introspection
  • next - invoke superclass method implementations
  • copy - create copies of objects and classes
• Packages and Source files
  • source - Evaluate a file or resource as a Tcl script
  • load - Load machine code and initialize new commands
  • unload - Unload machine code
  • package - Facilities for package loading and version control
  • tm - Facilities for locating and loading of Tcl Modules
  • pkg::create - Construct an appropriate 'package ifneeded' command for a given package specification
  • pkg_mkIndex - Build an index for automatic loading of packages
• Interpreter Routines
  • info - Return information about the state of the Tcl interpreter
  • interp - Create and manipulate Tcl interpreters
  • history - Manipulate the history list
  • bgerror - Command invoked to process background errors
  • unknown - Handle attempts to use non-existent commands
  • memory - Control Tcl memory debugging capabilities
• Library Procedures
  • http - Client-side implementation of the HTTP/1.1 protocol
  • encoding - Manipulate encodings
  • msgcat - Tcl message catalog
  • zlib - compression and decompression operations
• System Related
  • cd - Change working directory
  • pwd - Return the absolute path of the current working directory
  • clock - Obtain and manipulate dates and times
  • time - Time the execution of a script
  • exec - Invoke subprocesses
  • glob - Return names of files that match patterns
  • pid - Retrieve process identifiers
  • exit - End the application
• Platform-specific
  • platform::shell - System identification support code and utilities
  • platform - System identification support code and utilities
  • registry - Manipulate the Windows registry
  • dde - Execute a Dynamic Data Exchange command

Tcl C Procedures

• Initialization
  • Tcl_Main - main program, startup script, and event loop definition for Tcl-based applications
  • Tcl_AppInit - perform application-specific initialization
  • Tcl_FindExecutable - identify or return the name of the binary file containing the application
  • Tcl_CreateInterp - create and delete Tcl command interpreters
  • Tcl_CreateSlave - manage multiple Tcl interpreters, aliases and hidden commands
  • Tcl_GetVersion - get the version of the library at runtime
  • Tcl_RegisterConfig - procedures to register embedded configuration information
  • Tcl_PkgRequire - package version control
  • Tcl_StaticPackage - make a statically linked package available via the 'load' command
  • Tcl_Init - find and source initialization script
  • Tcl_CallWhenDeleted - Arrange for callback when interpreter is deleted
  • Tcl_SourceRCFile - source the Tcl rc file
  • Tcl_Exit - end the application or thread (and invoke exit handlers)
  • Tcl_Interp - client-visible fields of interpreter structures
  • Tcl_InitStubs - initialize the Tcl stubs mechanism
• Utilities
  • Tcl_Alloc - allocate or free heap memory
  • Tcl_Hash - procedures to manage hash tables
  • Tcl_DString - manipulate dynamic strings
  • Tcl_SetAssocData - manage associations of string keys and user specified data with Tcl interpreters
  • Tcl_Preserve - avoid freeing storage while it is being used
  • Tcl_UtfToUpper - routines for manipulating the case of Unicode characters and UTF-8 strings
  • Tcl_UniCharIsAlpha - routines for classification of Tcl_UniChar characters
  • Utf - routines for manipulating UTF-8 strings
  • Tcl_GetEncoding - procedures for creating and using encodings
  • Tcl_Concat - concatenate a collection of strings
  • Tcl_RegExpMatch - Pattern matching with regular expressions
  • Tcl_SplitList - manipulate Tcl lists
  • Tcl_SplitPath - manipulate platform-dependent file paths
  • Tcl_StringMatch - test whether a string matches a pattern
  • Tcl_GetInt - convert from string to integer, double, or boolean
  • Tcl_PrintDouble - Convert floating value to string
  • Tcl_GetIndexFromObj - lookup string in table of keywords
  • Tcl_WrongNumArgs - generate standard error message for wrong number of arguments
  • Tcl_ParseArgsObjv - parse arguments according to a tabular description
  • TCL_MEM_DEBUG - Compile-time flag to enable Tcl memory debugging
  • Tcl_DumpActiveMemory - Validated memory allocation interface
  • TclZlib - compression and decompression functions
• Input/Output
  • Tcl_StackChannel - manipulate stacked I/O channels
  • Tcl_CreateChannel - procedures for creating and manipulating channels
  • Tcl_CreateChannelHandler - call a procedure when a channel becomes readable or writable
  • Tcl_CreateCloseHandler - arrange for callbacks when channels are closed
  • Tcl_CreateFileHandler - associate procedure callbacks with files or devices (Unix only)
  • Tcl_SetChannelError - functions to create/intercept Tcl errors by channel drivers.
  • Tcl_GetOpenFile - Return a FILE* for a channel registered in the given interpreter (Unix only)
  • Standard Channels - How the Tcl library deals with the standard channels
  • Tcl_GetStdChannel - procedures for retrieving and replacing the standard channels
  • Tcl_OpenFileChannel - buffered I/O facilities using channels
  • Tcl_OpenTcpClient - procedures to open channels using TCP sockets
• The Event Loop
  • Tcl_AsyncCreate - handle asynchronous events
  • Tcl_DoOneEvent - wait for events and invoke event handlers
  • Tcl_DoWhenIdle - invoke a procedure when there are no pending events
  • Notifier - the event queue and notifier interfaces
  • Tcl_Sleep - delay execution for a given number of milliseconds
  • Tcl_CreateTimerHandler - call a procedure at a given time
  • Threads - Tcl thread support
• Objects
  • Tcl_Obj - manipulate Tcl values
  • Tcl_ObjType - manipulate Tcl value types
  • Tcl_BooleanObj - store/retrieve boolean value in a Tcl_Obj
  • Tcl_ByteArrayObj - manipulate Tcl values as a arrays of bytes
  • Tcl_IntObj - manipulate Tcl values as integers
  • Tcl_DoubleObj - manipulate Tcl values as floating-point values
  • Tcl_ListObj - manipulate Tcl values as lists
  • Tcl_StringObj - manipulate Tcl values as strings
  • Tcl_DictObj - manipulate Tcl values as dictionaries
• Invoking the Interpreter
  • Tcl_Eval - execute Tcl scripts
  • NRE - Non-Recursive (stackless) evaluation of Tcl scripts.
  • Tcl_SubstObj - perform substitutions on Tcl values
  • Tcl_ExprLongObj - evaluate an expression
  • Tcl_ExprLong - evaluate an expression
  • Tcl_ParseCommand - parse Tcl scripts and expressions
  • Tcl_Backslash - parse a backslash sequence
  • Tcl_CommandComplete - Check for unmatched braces in a Tcl command
  • Tcl_RecordAndEvalObj - save command on history list before evaluating
  • Tcl_RecordAndEval - save command on history list before evaluating
  • Tcl_SetRecursionLimit - set maximum allowable nesting depth in interpreter
  • Tcl_LimitCheck - manage and check resource limits on interpreters
  • Tcl_Cancel - cancel Tcl scripts
  • Tcl_AllowExceptions - allow all exceptions in next script evaluation
• Commands
  • Tcl_CreateObjCommand - implement new commands in C
  • Tcl_Ensemble - manipulate ensemble commands
  • Tcl_CreateCommand - implement new commands in C
  • Tcl_CreateMathFunc - Define, query and enumerate math functions for expressions
  • Tcl_SetResult - manipulate Tcl result
  • Tcl_SetErrno - manipulate errno to store and retrieve error codes
  • Tcl_SaveResult - save and restore an interpreter's state
  • Tcl_AddErrorInfo - retrieve or record information about errors and other return options
  • Tcl_BackgroundError - report Tcl exception that occurred in background processing
  • Tcl_Panic - report fatal error and abort
  • NRE - Non-Recursive (stackless) evaluation of Tcl scripts.
  • Tcl_Class - manipulate objects and classes
  • Tcl_Method - manipulate methods and method-call contexts
• Variables
  • Tcl_SetVar - manipulate Tcl variables
  • Tcl_LinkVar - link Tcl variable to C variable
  • Tcl_TraceVar - monitor accesses to a variable
  • Tcl_UpVar - link one variable to another
  • Tcl_CreateTrace - arrange for command execution to be traced
  • Tcl_TraceCommand - monitor renames and deletes of a command
  • Tcl_Namespace - manipulate namespaces
• Operating System Interface
  • Tcl_PutEnv - procedures to manipulate the environment
  • Filesystem - procedures to interact with any filesystem
  • Tcl_GetTime - get date and time
  • Tcl_GetCwd - manipulate the current working directory
  • Tcl_GetHostName - get the name of the local host
  • Tcl_TranslateFileName - convert file name to native form and replace tilde with home directory
  • Tcl_Access - check file permissions and other attributes
  • Tcl_DetachPids - manage child processes in background
  • Tcl_SignalId - Convert signal codes