C

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- Programmer's Reference
**C**- CAXPY Computes a constant times a vector plus a vector.
- CCOPY Copies vector X to Y.
- CDOTC Returns the complex dot product of two vectors, conjugating the first.
- CDOTU Returns the complex dot product of two vectors.
- CGBMV Performs matrix-vector operations with general banded matrices.
- CGEMM Performs matrix-matrix operations on general matrices.
- CGEMV Performs matrix-vector operation with general matrices.
- CGERC Performs the rank 1 operation.
- CGERU Performs the rank 1 operation.
- CHBMV Performs matrix-vector operations using a Hermitian band matrix.
- CHEMM Performs matrix-matrix operations on Hermitian matrices.
- CHEMV Performs matrix-vector operations using Hermitian matrices.
- CHER Performs the Hermitian rank 1 operation.
- CHER2 Performs the Hermitian rank 2 operation.
- CHER2K Performs Hermitian rank 2k operations.
- CHERK Performs Hermitian rank k operations.
- CHPMV Performs matrix-vector operations using a packed Hermitian matrix.
- CHPR Performs the Hermitian rank 1 operation.
- CHPR2 Performs the Hermitian rank 2 operation.
- CROTG Constructs Givens plane rotation.
- CSCAL Scales a vector by a constant.
- CSROT Applies a plane rotation.
- CSSCAL Scales a vector by a constant.
- CSWAP Interchanges vectors X and Y.
- CSYMM Performs matrix-matrix matrix operations on symmetric matrices.
- CSYR2K Performs symmetric rank 2k operations.
- CSYRK Perform symmetric rank k operations.
- CTBMV Performs matrix-vector operations using a triangular band matrix.
- CTBSV Solves system of equations.
- CTPMV Performs matrix-vector operations on a packed triangular matrix.
- CTPSV Solves systems of equations.
- CTRMM Performs matrix-matrix operations on triangular matrices.
- CTRMV Performs matrix-vector operations using a triangular matrix.
- CTRSM Solves certain matrix equations.
- CTRSV Solves system of equations.
- calloc Provides a memory allocator.
- callrpc Calls the remote procedure on the machine specified by the host parameter.
- can_change_color Color manipulation functions and external variables for color support.
- canput Tests for available room in a queue.
- catclose Closes a specified message catalog.
- catgets Retrieves a message from a catalog.
- catopen Opens a specified message catalog.
- cbc_crypt Implements Data Encryption Standard (DES) encryption routines.
- cbreak Puts the terminal into or out of CBREAK mode.
- cbrt Computes square root and cube root functions.
- ccsidtocs Provides conversion between coded character set IDs (CCSID) and code set names.
- ceil The floor subroutine, floorl subroutine, ceil subroutine, ceill subroutine, nearest subroutine, trunc subroutine, and rint subroutine round floating-point numbers to floating-point integer values. The itrunc subroutine and uitrunc subroutine round floating-point numbers to signed and unsigned integers, respectively. The fmod subroutine and fmodl subroutine compute the modulo remainder. The fabs subroutine and fabsl subroutine compute the floating-point absolute value.
- cfgetispeed Gets and sets input and output baud rates.
- cfgetospeed Gets and sets input and output baud rates.
- cfsetispeed Gets and sets input and output baud rates.
- cfsetospeed Gets and sets input and output baud rates.
- cfxfer Checks the status of the programmatic File Transfer.
- chacl Changes the permissions on a file.
- chdir Changes the current directory.
- chmod Changes file access permissions.
- chown Changes file ownership.
- chownx Changes file ownership.
- chpass Changes user passwords.
- chroot Changes the effective root directory.
- chssys Modifies the subsystem objects associated with the SubsystemName parameter.
- ckuserID Authenticates the user.
- ckuseracct Checks the validity of a user account.
- class Determines classifications of floating-point numbers.
- clear Clears a window.
- clearerr Checks the status of a stream.
- clearok Terminal output control subroutines.
- clnt_broadcast Broadcasts a remote procedure call to all locally connected networks.
- clnt_call Calls the remote procedure associated with the clnt parameter.
- clnt_control Changes or retrieves various information about a client object.
- clnt_create Creates and returns a generic client handle.
- clnt_destroy Destroys the client's Remote Procedure Call (RPC) handle.
- clnt_freeres Frees data that was allocated by the Remote Procedure Call/eXternal Data Representation (RPC/XDR) system.
- clnt_geterr Copies error information from a client handle.
- clnt_pcreateerror Indicates why a client Remote Procedure Call (RPC) handle was not created.
- clnt_perrno Specifies the condition of the stat parameter.
- clnt_perror Indicates why a remote procedure call failed.
- clnt_spcreateerror Indicates why a client Remote Procedure Call (RPC) handle was not created.
- clnt_sperrno Specifies the condition of the stat parameter by returning a pointer to a string containing a status message.
- clnt_sperror Indicates why a remote procedure call failed.
- clntraw_create Creates a toy Remote Procedure Call (RPC) client for simulation.
- clnttcp_create Creates a Transmission Control Protocol/Internet Protocol (TCP/IP) client transport handle.
- clntudp_create Creates a User Datagram Protocol/Internet Protocol (UDP/IP) client transport handle.
- clock Reports central processing unit (CPU) time used.
- clone Opens an unused minor device on another STREAMS driver.
- close Closes the file associated with a file descriptor.
- closedir Performs operations on directories.
- closelog Controls the system log.
- closelog_r Controls the system log.
- clrtobot Erases the current line from the logical cursor position to the end of the window.
- clrtoeol Erases the current line from the logical cursor position to the end of the line.
- color_content Color manipulation functions and external variables for color support.
- compare_and_swap Conditionally updates or returns a single word variable atomically.
- compile Compiles and matches regular-expression patterns.
- confstr Gets configurable variables.
- connect Connects two sockets.
- conv Translates characters.
- copyb Copies a message block.
- copymsg Copies a message.
- copysign Computes certain binary floating-point arithmetic functions.
- copywin Copies a region of a window.
- coredump Creates a core file without terminating the calling process.
- cos Computes the trigonometric functions.
- cosh Computes hyperbolic functions.
- coshl Computes hyperbolic functions.
- cosl Computes the trigonometric functions.
- creat Opens a file for reading or writing.
- creat64 Opens a file for reading or writing.
- crypt Encrypts or decrypts data.
- cs Compares and swaps data.
- csid Returns the character set ID (charsetID) of a multibyte character.
- cstoccsid Provides conversion between coded character set IDs (CCSID) and code set names.
- ctermid Generates the path name of the controlling terminal.
- ctime Converts the formats of date and time representations.
- ctime_r Converts the formats of date and time representations.
- ctype Classifies characters.
- curs_set Sets the cursor visibility.
- cuserid Gets the alphanumeric user name associated with the current process.