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OpenDarwin 7.2.1 - man page for tcl_getboolean (opendarwin section 3)

Tcl_GetInt(3)			      Tcl Library Procedures			    Tcl_GetInt(3)


       Tcl_GetInt,  Tcl_GetDouble,  Tcl_GetBoolean  -  convert from string to integer, double, or

       #include <tcl.h>

       Tcl_GetInt(interp, string, intPtr)

       Tcl_GetDouble(interp, string, doublePtr)

       Tcl_GetBoolean(interp, string, boolPtr)

       Tcl_Interp   *interp	 (in)	   Interpreter to use for error reporting.

       CONST char   *string	 (in)	   Textual value to be converted.

       int	    *intPtr	 (out)	   Points to place to store integer value converted  from

       double	    *doublePtr	 (out)	   Points  to  place  to store double-precision floating-
					   point value converted from string.

       int	    *boolPtr	 (out)	   Points to place to store boolean value (0 or  1)  con-
					   verted from string.

       These  procedures convert from strings to integers or double-precision floating-point val-
       ues or booleans (represented as 0- or 1-valued integers).  Each of the procedures takes	a
       string argument, converts it to an internal form of a particular type, and stores the con-
       verted value at the location indicated by the procedure's third	argument.   If	all  goes
       well, each of the procedures returns TCL_OK.  If string doesn't have the proper syntax for
       the desired type then TCL_ERROR is returned, an error message is left in the interpreter's
       result, and nothing is stored at *intPtr or *doublePtr or *boolPtr.

       Tcl_GetInt  expects string to consist of a collection of integer digits, optionally signed
       and optionally preceded by white space.	If the first two characters of string are  ``0x''
       then  string  is expected to be in hexadecimal form;  otherwise, if the first character of
       string is ``0'' then string is expected	to  be	in  octal  form;   otherwise,  string  is
       expected to be in decimal form.

       Tcl_GetDouble  expects  string  to  consist  of	a floating-point number, which is:  white
       space;  a sign; a sequence of digits;  a decimal point;	a sequence of digits;  the letter
       ``e'';	and a signed decimal exponent.	Any of the fields may be omitted, except that the
       digits either before or after the decimal point must  be  present  and  if  the	``e''  is
       present then it must be followed by the exponent number.

       Tcl_GetBoolean  expects	string to specify a boolean value.  If string is any of 0, false,
       no, or off, then Tcl_GetBoolean stores a zero value at *boolPtr.  If string is any  of  1,
       true,  yes,  or on, then 1 is stored at *boolPtr.  Any of these values may be abbreviated,
       and upper-case spellings are also acceptable.

       boolean, conversion, double, floating-point, integer

Tcl										    Tcl_GetInt(3)

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