Tcl_GetInt, Tcl_GetDouble, Tcl_GetBoolean - convert from string to integer, double, or boolean
#include <tcl.h>
int
Tcl_GetInt(interp, src, intPtr)
int
Tcl_GetDouble(interp, src, doublePtr)
int
Tcl_GetBoolean(interp, src, boolPtr)
- Tcl_Interp *interp (in)
-
Interpreter to use for error reporting.
- const char *src (in)
-
Textual value to be converted.
- int *intPtr (out)
-
Points to place to store integer value converted from src.
- double *doublePtr (out)
-
Points to place to store double-precision floating-point
value converted from src.
- int *boolPtr (out)
-
Points to place to store boolean value (0 or 1) converted from src.
These procedures convert from strings to integers or double-precision
floating-point values or booleans (represented as 0- or 1-valued
integers). Each of the procedures takes a src argument,
converts it to an internal form of a particular type, and stores
the converted value at the location indicated by the procedure's
third argument. If all goes well, each of the procedures returns
TCL_OK. If src 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 src to consist of a collection
of integer digits, optionally signed and optionally preceded by
white space. If the first two characters of src
after the optional white space and sign are ``0x''
then src is expected to be in hexadecimal form; otherwise,
if the first such character is ``0'' then src
is expected to be in octal form; otherwise, src is
expected to be in decimal form.
Tcl_GetDouble expects src 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''; a
signed decimal exponent ; and more white space.
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 src to specify a boolean
value. If src is any of 0, false,
no, or off, then Tcl_GetBoolean stores a zero
value at *boolPtr.
If src 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
Copyright © 1995-1997 Roger E. Critchlow Jr.
Copyright © 1989-1993 The Regents of the University of California.
Copyright © 1994-1996 Sun Microsystems, Inc.