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Added unsigned data formats (B, H, I, L).

This commit is contained in:
Guido van Rossum 1997-01-03 19:20:52 +00:00
parent 7a61f871a7
commit b0b8181622
2 changed files with 16 additions and 2 deletions
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9
Doc/lib/libarray.tex
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@ -12,16 +12,23 @@ which is a single character. The following type codes are defined:
\begin{tableiii}{|c|c|c|}{code}{Typecode}{Type}{Minimal size in bytes}
\lineiii{'c'}{character}{1}
\lineiii{'b'}{signed integer}{1}
\lineiii{'B'}{unsigned integer}{1}
\lineiii{'h'}{signed integer}{2}
\lineiii{'H'}{unsigned integer}{2}
\lineiii{'i'}{signed integer}{2}
\lineiii{'I'}{unsigned integer}{2}
\lineiii{'l'}{signed integer}{4}
\lineiii{'L'}{unsigned integer}{4}
\lineiii{'f'}{floating point}{4}
\lineiii{'d'}{floating point}{8}
\end{tableiii}
The actual representation of values is determined by the machine
architecture (strictly speaking, by the C implementation). The actual
size can be accessed through the \var{itemsize} attribute.
size can be accessed through the \var{itemsize} attribute. The values
stored for \code{'L'} and \code{'I'} items will be represented as
Python long integers when retrieved, because Python's plain integer
type can't represent the full range of C's unsigned (long) integers.
See also built-in module \code{struct}.
\bimodindex{struct}

9
Doc/libarray.tex
View File

@ -12,16 +12,23 @@ which is a single character. The following type codes are defined:
\begin{tableiii}{|c|c|c|}{code}{Typecode}{Type}{Minimal size in bytes}
\lineiii{'c'}{character}{1}
\lineiii{'b'}{signed integer}{1}
\lineiii{'B'}{unsigned integer}{1}
\lineiii{'h'}{signed integer}{2}
\lineiii{'H'}{unsigned integer}{2}
\lineiii{'i'}{signed integer}{2}
\lineiii{'I'}{unsigned integer}{2}
\lineiii{'l'}{signed integer}{4}
\lineiii{'L'}{unsigned integer}{4}
\lineiii{'f'}{floating point}{4}
\lineiii{'d'}{floating point}{8}
\end{tableiii}
The actual representation of values is determined by the machine
architecture (strictly speaking, by the C implementation). The actual
size can be accessed through the \var{itemsize} attribute.
size can be accessed through the \var{itemsize} attribute. The values
stored for \code{'L'} and \code{'I'} items will be represented as
Python long integers when retrieved, because Python's plain integer
type can't represent the full range of C's unsigned (long) integers.
See also built-in module \code{struct}.
\bimodindex{struct}