diff options
Diffstat (limited to 'Doc/lib/libstruct.tex')
| -rw-r--r-- | Doc/lib/libstruct.tex | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/Doc/lib/libstruct.tex b/Doc/lib/libstruct.tex index f29d83c..6431ca5 100644 --- a/Doc/lib/libstruct.tex +++ b/Doc/lib/libstruct.tex @@ -101,8 +101,8 @@ expression. This is always combined with native byte order. Standard size and alignment are as follows: no alignment is required for any type (so you have to use pad bytes); short is 2 bytes; int and -long are 4 bytes. In this mode, there is no support for float and -double (\code{'f'} and \code{'d'}). +long are 4 bytes. Float and double are 32-bit and 64-bit IEEE floating +point numbers, respectively. Note the difference between \code{'@'} and \code{'='}: both use native byte order, but the size and alignment of the latter is standardized. @@ -119,10 +119,14 @@ Examples (all using native byte order, size and alignment, on a big-endian machine): \bcode\begin{verbatim} -from struct import * -pack('hhl', 1, 2, 3) == '\000\001\000\002\000\000\000\003' -unpack('hhl', '\000\001\000\002\000\000\000\003') == (1, 2, 3) -calcsize('hhl') == 8 +>>> from struct import * +>>> pack('hhl', 1, 2, 3) +'\000\001\000\002\000\000\000\003' +>>> unpack('hhl', '\000\001\000\002\000\000\000\003') +(1, 2, 3) +>>> calcsize('hhl') +8 +>>> \end{verbatim}\ecode Hint: to align the end of a structure to the alignment requirement of |