Mercurial > cpython-lru_cache-weakref
diff Python/getargs.c @ 9306:79439e4e9976 legacy-trunk
Implement new format character 't#'. This is like s#, accepting an
object that implements the buffer interface, but requires a buffer
that contains 8-bit character data. Greg Stein.
| author | Guido van Rossum <guido@python.org> |
|---|---|
| date | Thu, 08 Oct 1998 02:21:21 +0000 |
| parents | d437b6683e24 |
| children | 98e37347378b |
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--- a/Python/getargs.c Thu Oct 08 02:18:52 1998 +0000 +++ b/Python/getargs.c Thu Oct 08 02:21:21 1998 +0000 @@ -712,6 +712,31 @@ 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>";