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Implement new format character 't#'. This is like s#, accepting an

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object that implements the buffer interface, but requires a buffer
that contains 8-bit character data.  Greg Stein.
This commit is contained in:
Guido van Rossum 1998-10-08 02:21:21 +00:00
parent 1db7070217
commit b317f8aa0d
1 changed files with 25 additions and 0 deletions
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25
Python/getargs.c
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@ -712,6 +712,31 @@ convertsimple1(arg, p_format, p_va)
break;
}
case 't': /* 8-bit character buffer, read-only access */
{
const char **p = va_arg(*p_va, const char **);
PyBufferProcs *pb = arg->ob_type->tp_as_buffer;
int count;
if ( *format++ != '#' )
return "invalid use of 't' format character";
if ( !PyType_HasFeature(
arg->ob_type,
Py_TPFLAGS_HAVE_GETCHARBUFFER) ||
pb == NULL ||
pb->bf_getcharbuffer == NULL ||
pb->bf_getsegcount == NULL )
return "read-only character buffer";
if ( (*pb->bf_getsegcount)(arg, NULL) != 1 )
return "single-segment read-only buffer";
if ( (count = pb->bf_getcharbuffer(arg, 0, p)) < 0 )
return "(unspecified)";
*va_arg(*p_va, int *) = count;
break;
}
default:
return "impossible<bad format char>";