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* arithmetic on pointers change the size by the pointer size type

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* several fixes to prototypes, to be more delphi compatible
This commit is contained in:
carl 2002-09-15 16:56:16 +00:00
parent 15e4013c2b
commit 072df0b43d
1 changed files with 19 additions and 14 deletions
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33
docs/ref.tex
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@ -1356,8 +1356,10 @@ begin
P2 := P2+4;
end.
\end{verbatim}
Here, the value that is added or substracted is {\em not} multiplied by the
size of the type the pointer points to.
Here, the value that is added or substracted {\em is } multiplied by the
size of the type the pointer points to. In the previous
example \var{P1} will be decremented by 16 bytes, and
\var{P2} will be incremented by 16.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Procedural types
@ -4910,12 +4912,12 @@ Functions concerning memory issues.
\procrefl{MoveChar0}{MoveCharNull}{Move data till first zero character}
\procref{New}{Dynamically allocate memory for variable}
\funcref{Ofs}{Return offset of variable}
\funcref{Ptr}{Combine segmant and offset to pointer}
\funcref{Ptr}{Combine segment and offset to pointer}
\procref{Release}{Release memory above mark point}
\funcref{Seg}{Return segment}
\procref{SetMemoryManager}{Set a memory manager}
\funcref{Sptr}{Return current stack pointer}
\funcref{SSeg}{Return ESS register value}
\funcref{SSeg}{Return stack segment register value}
\end{funclist}
\subsection{Mathematical routines}
@ -4984,7 +4986,9 @@ Functions that do not belong in one of the other categories.
\begin{funclist}
\procref{Break}{Abort current loop}
\procref{Continue}{Next cycle in current loop}
\procref{Exclude}{Exclude an element from a set}
\procref{Exit}{Exit current function or procedure}
\procref{Include}{Include an element into a set}
\procref{LongJmp}{Jump to execution point}
\funcref{Ord}{Return ordinal value of enumerated type}
\funcref{Pred}{Return previous value of ordinal type}
@ -5378,7 +5382,7 @@ None.
\begin{function}{Copy}
\Declaration
Function Copy (Const S : String;Index : Integer;Count : Byte) : String;
Function Copy (Const S : String;Index : Integer;Count : Integer) : String;
\Description
\var{Copy} returns a string which is a copy if the \var{Count} characters
@ -5428,7 +5432,7 @@ None.
\begin{procedure}{Dec}
\Declaration
Procedure Dec (Var X : Any ordinal type[; Decrement : Longint]);
Procedure Dec (Var X : Any ordinal type[; Decrement : Any ordinal type]);
\Description
\var{Dec} decreases the value of \var{X} with \var{Decrement}.
@ -5870,7 +5874,7 @@ None.
\begin{procedure}{Inc}
\Declaration
Procedure Inc (Var X : Any ordinal type[; Increment : Longint]);
Procedure Inc (Var X : Any ordinal type[; Increment : Any ordinal type]);
\Description
\var{Inc} increases the value of \var{X} with \var{Increment}.
@ -5977,7 +5981,7 @@ If \var{W} is not found then -1 is returned.
\begin{procedure}{Insert}
\Declaration
Procedure Insert (Const Source : String;var S : String;Index : Longint);
Procedure Insert (Const Source : String;var S : String;Index : Integer);
\Description
\var{Insert} inserts string \var{Source} in string \var{S}, at position
@ -6079,14 +6083,15 @@ All I/O functions.
\begin{function}{Length}
\Declaration
Function Length (S : String) : Byte;
Function Length (S : String) : Integer;
\Description
\var{Length} returns the length of the string \var{S}, which is limited
to 255 for shortstrings. If the strings \var{S} is empty, 0 is returned.
{\em Note:} The length of the string \var{S} is stored in \var{S[0]} for
shortstrings only. Ansistrings have their length stored elsewhere,
the \var{Length} fuction should always be used on ansistrings.
shortstrings only. The \var{Length} fuction should always be used on
ansistrings and widestrings.
\Errors
None.
@ -6411,7 +6416,7 @@ None.
\begin{function}{Pos}
\Declaration
Function Pos (Const Substr : String;Const S : String) : Byte;
Function Pos (Const Substr : String;Const S : String) : Integer;
\Description
\var{Pos} returns the index of \var{Substr} in \var{S}, if \var{S} contains
\var{Substr}. In case \var{Substr} isn't found, \var{0} is returned.
@ -6976,9 +6981,9 @@ None.
\begin{function}{StringOfChar}
\Declaration
Function StringOfChar(c : char;l : longint) : AnsiString;
Function StringOfChar(c : char;l : Integer) : String;
\Description
\var{StringOfChar} creates a new Ansistring of length \var{l} and fills
\var{StringOfChar} creates a new String of length \var{l} and fills
it with the character \var{c}.
It is equivalent to the following calls: