Tag Archives: XTOC
FTOC()
FTOC()
Converts a floating point number into a special 8-byte string
Syntax
FTOC(<nFloatingPointNumber>) --> cFloatingPointNumber
Arguments
<nFloatingPointNumber> Designate any Clipper number.
Returns
FTOC() return a string with the size of DOUBLE.
ATTENTION: different implementations or platforms of Harbour, they could produce different format in the string returned by FTOC().
Description
Harbour internal numbers in Floating Point are stored in data type DOUBLE. FTOC() returns these bits as an string. In this way, numbers con be saved more compactly.
Note
. The XTOC() function converts floating point numbers in the same way.
Example
It is not useful to display the return value on the screen:
NumberString := FTOC(274711.335) // 8 byte string
Platforms
All
Files
Source is ftoc.c, library is libct.
See also
CTOF(), XTOC()
CToF()
CToF()
Converts a special 8-byte string into a floating point number
Syntax
CToF( <cFloatingPointNumber> ) --> nFloatingPointNumber
Arguments
<cFloatingPointNumber> Designate a string that contains a Harbour number in flotaing point format.
Returns
CToF() return the floating point number that corresponds to the string passed.
ATTENTION: different implementations or platforms of Harbour, they could produce different format in the string returned by FTOC().
Description
Character strings created with FTOC() or XTOC() are convert into Harbour floating point number Note that when you use XTOC(), character strings or portions of character strings, can be switched back, if they have been displayed as Harbour floating point numbers.
Examples
. Change a number and then change it back:
CToF(FTOC(1234.55)) // Result: 1234.55
. This also works for XTOC():
? CToF(XTOC(1234.55)) // Result: 1234.55
Platforms
All
Files
Source is ftoc.c, library is libct.
Seealso
FToC(), XToC()
Conversion Functions
Harbour Conversion Functions
| Bin2I | Convert signed short encoded bytes into Harbour numeric |
| Bin2L | Convert signed long encoded bytes into Harbour numeric |
| Bin2U | Convert unsigned long encoded bytes into Harbour numeric |
| Bin2W | Convert unsigned short encoded bytes into Harbour numeric |
| BitToC | Converts position-dependent bits into characters |
| BinToDec | Converts a Binary Value to Decimal |
| CToBit | Converts a character string into a bit pattern |
| CToF | Converts a special 8-byte string into a floating point number |
| CToN | Converts a numeric string into a different base |
| DecToBin | Converts a Decimal Value to Binary |
| DecToHexa | Converts a Decimal Value to Hexa |
| DecToOctal | Converts a Decimal Value to Octal |
| Fahrenheit | Temperature conversion Celsius to Fahrenheit |
| FToC | Converts a floating point number into a special 8-byte string |
| HexaToDec | Converts a Hexa Value to Decimal |
| I2Bin | Convert Harbour numeric into signed short encoded bytes |
| L2Bin | Convert Harbour numeric into signed long encoded bytes |
| NToC | Converts the numbers in a digit string into a different number base |
| OctalToDec | Converts a Octal Value to Decimal |
| U2Bin | Convert Harbour numeric into unsigned long encoded bytes |
| W2Bin | Convert Harbour numeric into unsigned short encoded bytes |
| Word | Converts double to integer values |
| XTOC | Convert an expression to character type string |
CT_XTOC
XTOC()
Converts an expression of any data type into a string
------------------------------------------------------------------------------
Syntax
XTOC(<expValue>) --> cValue
Argument
<expValue> Designates an expression of any desired data type.
Returns
XTOC() returns a character string version of the <expValue> parameter.
Description
At first glance, the XTOC() function does not appear to accomplish
anything that cannot be done with the other functions. However, the
advantage lies in the fact that you do not have to pay attention to the
input data types. For example, you can convert the data in every field
within a loop into a string. You could then link these into a longer
string and use them to index or for comparisons.
Each data type always returns a string with a particular fixed length:
Table 13-9: Resulting String
------------------------------------------------------------------------
Data Type Result Length
------------------------------------------------------------------------
Numeric 8
Logical 1
Date 8
String Unchanged
------------------------------------------------------------------------
Note
. The index string cannot be longer than 256 characters.
Examples
. In the case of logical parameters, XTOC() works like LTOC():
? XTOC(.T.) // "T"
? XTOC(.F.) // "F"
. Numeric values always return an 8-byte string:
? XTOC(0) // Length 8
? XTOC(9.9) // Ditto
? XTOC(-9.9) // Ditto
? XTOC(99) // Ditto
? XTOC(-99) // Ditto
. A string returns the same string:
? XTOC("123ABCabc") // "123ABCabc"
. A date returns the ANSI date:
? XTOC(CTOD("12/31/99")) // "19991231"
? XTOC(CTOD("01/01/00") // "19000101"
. An empty or false date returns an empty string rather than a
null string:
? XTOC(CTOD(" / / ") // " "
? XTOC(CTOD("77/77/77") // " "
. Show a function where all the fields in a database are
combined into one string. This way, you can do a complete comparison
of the two data strings:
FUNCTION STRINGREC
PRIVATE nI, nFieldNo, cField, cStringRec
cStringRec := ""
nFieldNo := FCOUNT() // Number of fields
FOR nI = 1 to nFieldNo
cField := FIELD(nI) // Field name
cStringRec := cStringRec + XTOC(&cField)
NEXT nI
RETURN (cStringRec)
See Also: CTOF()
Tools – Miscellaneous Functions
Introduction Miscellaneous Functions ALLOFREE()* Determines the maximum memory size allocation BLANK() Creates a blank value for each data type COMPLEMENT() Forms the complement value of a data type DATATYPE()* Determines the data type of a variable or UDF GETTIC() Determines the number of timer ticks KBDDISABLE() Locks/unlocks the keyboard KBDEMULATE() Inserts characters into BIOS keyboard buffer to emulate input KBDSPEED() Sets keyboard auto repeat speed KBDSTAT() Tests for key shift state status, such as Ctrl and Shift KBDTYPE() Determines the type of keyboard in use KEYSEC() Triggers a key trap after a time delay KEYTIME() Triggers a key trap at a specific clock time MILLISEC() Time delay in milliseconds NUL() Converts the value returned by a function into a null string SCANKEY() Queries scan code of keyboard input SETTIC() Increases number of time ticks SHOWKEY() Continuously displays the INSERT and LOCK status SOUND() Creates tones (melodies) by designating frequency and duration SPEED() A comparison value used to determine the processor speed STACKFREE() Determines the remaining stack space TOOLVER() Queries the version number of the Clipper Tools in use XTOC() Converts an expression of any data type into a string
