{ SPX Library Version 2.0
Copyright 1993 Scott D. Ramsay }
SPX_FNC contains general functions and procedures that are used
by most of the units.
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function sgn(h:integer):integer;
Returns -1 if H is less than zero
1 if H is greater than zero
0 if H is equal to zero
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function strint(s:string):longint;
converts a four character string to a longint value;
The characters are repesented at hi and lo byte values of the longint.
EXAMPLE:
var
s : string;
l : longint;
begin
s := 'AT';
l := strint(s); { l := 21569 or $00005441 }
end;
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function intstr(l:longint):string;
converts a longint to a four character string.
EXAMPLE:
var
s : string;
l : longint;
begin
s := intstr(21569);
end;
{ s := 'AT'#0#0; }
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function ups(s:string):string;
returns S in all uppercase letters.
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function st(h:longint):string;
converts H to a string
EXAMPLE:
var
s : string;
begin
s := st(123);
end;
{ s := '123';
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function compare(s1,s2:string):boolean;
Compares two strings returns true if they are equal up to the length
of S1.
EXAMPLE:
compare('SPXLIB','SPX') returns FALSE
compare('SPX','SPXLIB') returns TRUE
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function dtcmp(var s1,s2;size:word):boolean;
Same as function CMP.
Here for compatibility
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function cmp(var s1,s2;size:word):boolean;
Compares to variables of unknown types.
S1,S2:
SIZE:
objects of any type to compare
size of objects
Returns true if the bytes within S1 and S2 are equal
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function lz(i,w:longint):string;
Converts a longint to a string with leading zeros.
I:
W:
Integer to convert
Number of spaces to place zeros
EXAMPLE:
var
s : string;
begin
s := lz(1234,7);
end;
{ s := '0001234'; }
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function vl(h:string):longint;
converts a string to a longint value
H: string to convert
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function spaces(h:integer):string;
Creates a string with H number of spaces
EXAMPLE:
s := spaces(10); { s := '
'; (* ten spaces *) }
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function repstr(h:integer;ch:char):string;
Creates a string with H number of the character ch.
EXAMPLE:
s := repstr(10,'A');
{ s := 'AAAAAAAAAA'; }
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function ifix(var a:integer;min,max:integer):boolean;
Sets an integer to the range min..max.
A:
MIN:
MAX:
Value to change
Minimum value A can be
Maximum value A can be
Returns TRUE if the variable was changed.
EXAMPLE:
{$X+ }
{ enable extended syntax }
var
a,b,c
: integer;
modified,
didChange : boolean;
begin
a := -10;
b := 112;
c := 50;
didChange := ifix(a,0,100);
modified := ifix(c,0,100);
ifix(b,0,100);
{
{
{
{
{
end;
didChange := TRUE }
modified := FALSE }
a := 0 }
b := 100 }
c := 50 }
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function rfix(var a:real;min,max:real):boolean;
Sets a real to the range min..max.
A:
MIN:
MAX:
Value to change
Minimum value A can be
Maximum value A can be
Returns TRUE if the variable was changed.
EXAMPLE
See function ifix
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function anything(s:string):boolean;
Returns TRUE if the S is not an empty string or if any of
the characters in S is in the range #32..#255 (ascii)
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function exist(f:string):boolean;
Returns TRUE if the file exist on disk
F: The file to check. Can have full file spec.
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
function TPerror(errorcode:integer) : string;
Returns an Turbo Pascal error string
ERRORCODE:
value generated by the funciton IOresult
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
procedure funpad(var s:string);
Removes all leading spaces from the string S
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
procedure unpad(var s:string);
Removes all trailing spaces from the string S
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
procedure munpad(var s:string;b:byte);
Cuts string S to length B. Then removes all trailing charaters
that are in the range #0..#31.
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
function fpad(s:string;h:integer):string;
Returns the string S with length H by adding trailing spaces
if nessasary.
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
procedure pad(var s:string;h:integer);
Same as fpad.
if nessasary.
Changes string S to length H by adding trailing spaces
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
procedure fix(var s:string;h:string);
Adds an extension to the file name S if one does not exist.
S: String to check for extenstion
H: extension to add
EXAMPLE:
s1 := 'mypic';
s2 := 'mypic2.';
s3 := 'mypic3.dog';
s4 := 'mypic4.pcx';
fix(s1,'.PCX');
fix(s2,'.PCX');
fix(s3,'.PCX');
fix(s4,'.PCX');
{
{
{
{
s1
s2
s3
s4
:=
:=
:=
:=
'mypic.PCX'
'mypic2.'
'mypic3.dog'
'mypic.pcx'
}
}
}
}
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
procedure fixh(var s:string);
Converts all characters in S that are in the range #0..#31 to spaces
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
function range(x,y,x1,y1,x2,y2:integer) : boolean;
Returns TRUE if the point (x,y) is in the rectangle (x1,y1,x2,y2)
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
function rrange(x,y,x1,y1,x2,y2:real) : boolean;
Returns TRUE if the point (x,y) is in the rectangle (x1,y1,x2,y2)
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
function between(x,x1,x2:longint):boolean;
Returns TRUE if X is between X1 and X2
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
function fspaces(s:string;skip:byte):string;
Returns a string portion in S delimited by spaces. Returns an empty
string if one is not found.
S:
SKIP:
string to search
number of strings to skip
EXAMPLE:
s := 'Now is the time for all good men to';
writeln(fspaces(s,0));
writeln(fspaces(s,3));
writeln(fspaces(s,9));
{ outputs 'Now' }
{ outputs 'time' }
{ outputs ''
}
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
function GetPtr(p:pointer;offset:longint):pointer;
Creates a new pointer at P+offset. Adjusts for segment boundries.
Returns the new pointer location. Note: offset MUST be positive or zero.
P:
OFFSET:
pointer to adjust
offset for the pointer (in bytes)
EXAMPLE:
var
p : pointer;
p := GetPtr(SomePointer,88000);
{ p points to 88000 bytes past SomePointer }
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
function sar(value:integer;shift:byte):integer;
Shift arithmetic right.
Same as SHR but maintains the signed (hi) bit.
VALUE: integer value to shift.
SHIFT: bits to shift
note: I don't know why Borland never added this operator! I hate
to type the typecast each time. ( integer(value shr shift) )
EXAMPLE:
writeln(sar(10,1));
writeln(sar(-10,1));
{ outputs 5 }
{ outputs -5 }
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
function sal(value:integer;shift:byte):integer;
Shift arithmetic left.
Same as SHL but maintains the signed (hi) bit.
VALUE: integer value to shift.
SHIFT: bits to shift
EXAMPLE:
writeln(sal(10,1));
writeln(sal(-10,1));
{ outputs 20 }
{ outputs -20 }
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
function ptr2hex(p:pointer):string;
Converts a pointer to a string in hexadecimal format
P: pointer to convert
p := ptr($a000,20);
writeln(ptr2hex(p));
{ outputs
A000:0014 }
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
function word2hex(w:word):string;
Converts a word value to hexadecimal format
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
function byte2hex(b:byte):string;
Converts a byte value to hexadecimal format
ﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄﾄ
procedure atexit(proc:QuitProc);
Same as the function in C. Calls a quit procedure at exit. Can use
many times. Chains multiple procedures. At the exit of the program
the procedure are called in a LIFO fashion. (Last in-First out) The
last atexit procedure is the first one to be called.
PROC: procedure to call at the end of the program. Must be declared
as a far procedure.
EXAMPLE:
Uses spx_fnc;
{$F+ }
procedure cleanup;
begin
{ do my clean up routines here }
end;
procedure returnToTextMode;
begin
textmode(c80);
end;
begin
atexit(cleanup);
atexit(returnToTextMode);
end.