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Issue #16166: Add PY_LITTLE_ENDIAN and PY_BIG_ENDIAN macros and unified

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endianess detection and handling.
This commit is contained in:
Christian Heimes 2012-10-17 23:52:17 +02:00
parent 1e9af84e2e
commit 743e0cd6b5
15 changed files with 78 additions and 107 deletions
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18
Objects/unicodeobject.c
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@ -47,14 +47,6 @@ OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
#include <windows.h>
#endif
/* Endianness switches; defaults to little endian */
#ifdef WORDS_BIGENDIAN
# define BYTEORDER_IS_BIG_ENDIAN
#else
# define BYTEORDER_IS_LITTLE_ENDIAN
#endif
/* --- Globals ------------------------------------------------------------
The globals are initialized by the _PyUnicode_Init() API and should
@ -4813,7 +4805,7 @@ PyUnicode_DecodeUTF32Stateful(const char *s,
int bo = 0; /* assume native ordering by default */
const char *errmsg = "";
/* Offsets from q for retrieving bytes in the right order. */
#ifdef BYTEORDER_IS_LITTLE_ENDIAN
#if PY_LITTLE_ENDIAN
int iorder[] = {0, 1, 2, 3};
#else
int iorder[] = {3, 2, 1, 0};
@ -4835,7 +4827,7 @@ PyUnicode_DecodeUTF32Stateful(const char *s,
if (size >= 4) {
const Py_UCS4 bom = (q[iorder[3]] << 24) | (q[iorder[2]] << 16) |
(q[iorder[1]] << 8) | q[iorder[0]];
#ifdef BYTEORDER_IS_LITTLE_ENDIAN
#if PY_LITTLE_ENDIAN
if (bom == 0x0000FEFF) {
q += 4;
bo = -1;
@ -4949,7 +4941,7 @@ _PyUnicode_EncodeUTF32(PyObject *str,
unsigned char *p;
Py_ssize_t nsize, i;
/* Offsets from p for storing byte pairs in the right order. */
#ifdef BYTEORDER_IS_LITTLE_ENDIAN
#if PY_LITTLE_ENDIAN
int iorder[] = {0, 1, 2, 3};
#else
int iorder[] = {3, 2, 1, 0};
@ -5092,7 +5084,7 @@ PyUnicode_DecodeUTF16Stateful(const char *s,
return unicode_empty;
}
#ifdef BYTEORDER_IS_LITTLE_ENDIAN
#if PY_LITTLE_ENDIAN
native_ordering = bo <= 0;
#else
native_ordering = bo >= 0;
@ -5209,7 +5201,7 @@ _PyUnicode_EncodeUTF16(PyObject *str,
unsigned short *out;
Py_ssize_t bytesize;
Py_ssize_t pairs;
#ifdef WORDS_BIGENDIAN
#if PY_BIG_ENDIAN
int native_ordering = byteorder >= 0;
#else
int native_ordering = byteorder <= 0;