closes bpo-39605: Fix some casts to not cast away const. (GH-18453)
gcc -Wcast-qual turns up a number of instances of casting away constness of pointers. Some of these can be safely modified, by either: Adding the const to the type cast, as in: - return _PyUnicode_FromUCS1((unsigned char*)s, size); + return _PyUnicode_FromUCS1((const unsigned char*)s, size); or, Removing the cast entirely, because it's not necessary (but probably was at one time), as in: - PyDTrace_FUNCTION_ENTRY((char *)filename, (char *)funcname, lineno); + PyDTrace_FUNCTION_ENTRY(filename, funcname, lineno); These changes will not change code, but they will make it much easier to check for errors in consts
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029e8401b7
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e6be9b59a9
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@ -2025,7 +2025,7 @@ find_control_char(int kind, const char *s, const char *end, Py_UCS4 ch)
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{
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if (kind == PyUnicode_1BYTE_KIND) {
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assert(ch < 256);
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return (char *) memchr((void *) s, (char) ch, end - s);
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return (char *) memchr((const void *) s, (char) ch, end - s);
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}
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for (;;) {
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while (PyUnicode_READ(kind, s, 0) > ch)
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@ -2043,7 +2043,7 @@ _PyIO_find_line_ending(
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int translated, int universal, PyObject *readnl,
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int kind, const char *start, const char *end, Py_ssize_t *consumed)
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{
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Py_ssize_t len = ((char*)end - (char*)start)/kind;
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Py_ssize_t len = (end - start)/kind;
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if (translated) {
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/* Newlines are already translated, only search for \n */
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@ -12,7 +12,7 @@ PyObject*
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_Py_bytes_isspace(const char *cptr, Py_ssize_t len)
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{
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const unsigned char *p
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= (unsigned char *) cptr;
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= (const unsigned char *) cptr;
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const unsigned char *e;
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/* Shortcut for single character strings */
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@ -42,7 +42,7 @@ PyObject*
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_Py_bytes_isalpha(const char *cptr, Py_ssize_t len)
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{
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const unsigned char *p
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= (unsigned char *) cptr;
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= (const unsigned char *) cptr;
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const unsigned char *e;
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/* Shortcut for single character strings */
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@ -72,7 +72,7 @@ PyObject*
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_Py_bytes_isalnum(const char *cptr, Py_ssize_t len)
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{
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const unsigned char *p
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= (unsigned char *) cptr;
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= (const unsigned char *) cptr;
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const unsigned char *e;
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/* Shortcut for single character strings */
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@ -123,7 +123,7 @@ _Py_bytes_isascii(const char *cptr, Py_ssize_t len)
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/* Help allocation */
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const char *_p = p;
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while (_p < aligned_end) {
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unsigned long value = *(unsigned long *) _p;
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unsigned long value = *(const unsigned long *) _p;
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if (value & ASCII_CHAR_MASK) {
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Py_RETURN_FALSE;
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}
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@ -154,7 +154,7 @@ PyObject*
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_Py_bytes_isdigit(const char *cptr, Py_ssize_t len)
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{
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const unsigned char *p
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= (unsigned char *) cptr;
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= (const unsigned char *) cptr;
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const unsigned char *e;
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/* Shortcut for single character strings */
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@ -184,7 +184,7 @@ PyObject*
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_Py_bytes_islower(const char *cptr, Py_ssize_t len)
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{
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const unsigned char *p
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= (unsigned char *) cptr;
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= (const unsigned char *) cptr;
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const unsigned char *e;
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int cased;
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@ -218,7 +218,7 @@ PyObject*
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_Py_bytes_isupper(const char *cptr, Py_ssize_t len)
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{
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const unsigned char *p
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= (unsigned char *) cptr;
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= (const unsigned char *) cptr;
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const unsigned char *e;
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int cased;
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@ -254,7 +254,7 @@ PyObject*
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_Py_bytes_istitle(const char *cptr, Py_ssize_t len)
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{
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const unsigned char *p
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= (unsigned char *) cptr;
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= (const unsigned char *) cptr;
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const unsigned char *e;
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int cased, previous_is_cased;
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@ -1682,8 +1682,8 @@ unpack_single(const char *ptr, const char *fmt)
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switch (fmt[0]) {
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/* signed integers and fast path for 'B' */
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case 'B': uc = *((unsigned char *)ptr); goto convert_uc;
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case 'b': ld = *((signed char *)ptr); goto convert_ld;
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case 'B': uc = *((const unsigned char *)ptr); goto convert_uc;
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case 'b': ld = *((const signed char *)ptr); goto convert_ld;
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case 'h': UNPACK_SINGLE(ld, ptr, short); goto convert_ld;
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case 'i': UNPACK_SINGLE(ld, ptr, int); goto convert_ld;
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case 'l': UNPACK_SINGLE(ld, ptr, long); goto convert_ld;
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@ -2684,8 +2684,8 @@ unpack_cmp(const char *p, const char *q, char fmt,
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switch (fmt) {
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/* signed integers and fast path for 'B' */
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case 'B': return *((unsigned char *)p) == *((unsigned char *)q);
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case 'b': return *((signed char *)p) == *((signed char *)q);
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case 'B': return *((const unsigned char *)p) == *((const unsigned char *)q);
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case 'b': return *((const signed char *)p) == *((const signed char *)q);
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case 'h': CMP_SINGLE(p, q, short); return equal;
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case 'i': CMP_SINGLE(p, q, int); return equal;
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case 'l': CMP_SINGLE(p, q, long); return equal;
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@ -18,7 +18,7 @@
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#define STRINGLIB_TODECIMAL Py_UNICODE_TODECIMAL
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#define STRINGLIB_STR PyUnicode_1BYTE_DATA
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#define STRINGLIB_LEN PyUnicode_GET_LENGTH
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#define STRINGLIB_NEW(STR,LEN) _PyUnicode_FromASCII((char*)(STR),(LEN))
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#define STRINGLIB_NEW(STR,LEN) _PyUnicode_FromASCII((const char*)(STR),(LEN))
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#define STRINGLIB_CHECK PyUnicode_Check
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#define STRINGLIB_CHECK_EXACT PyUnicode_CheckExact
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@ -46,7 +46,7 @@ STRINGLIB(utf8_decode)(const char **inptr, const char *end,
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/* Read a whole long at a time (either 4 or 8 bytes),
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and do a fast unrolled copy if it only contains ASCII
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characters. */
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unsigned long value = *(unsigned long *) _s;
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unsigned long value = *(const unsigned long *) _s;
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if (value & ASCII_CHAR_MASK)
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break;
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#if PY_LITTLE_ENDIAN
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@ -515,7 +515,7 @@ STRINGLIB(utf16_decode)(const unsigned char **inptr, const unsigned char *e,
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/* Fast path for runs of in-range non-surrogate chars. */
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const unsigned char *_q = q;
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while (_q < aligned_end) {
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unsigned long block = * (unsigned long *) _q;
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unsigned long block = * (const unsigned long *) _q;
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if (native_ordering) {
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/* Can use buffer directly */
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if (block & FAST_CHAR_MASK)
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@ -28,7 +28,7 @@ STRINGLIB(find_max_char)(const STRINGLIB_CHAR *begin, const STRINGLIB_CHAR *end)
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/* Help register allocation */
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const unsigned char *_p = p;
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while (_p < aligned_end) {
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unsigned long value = *(unsigned long *) _p;
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unsigned long value = *(const unsigned long *) _p;
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if (value & UCS1_ASCII_CHAR_MASK)
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return 255;
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_p += SIZEOF_LONG;
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@ -172,8 +172,8 @@ extern "C" {
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#define _PyUnicode_CONVERT_BYTES(from_type, to_type, begin, end, to) \
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do { \
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to_type *_to = (to_type *)(to); \
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const from_type *_iter = (from_type *)(begin); \
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const from_type *_end = (from_type *)(end); \
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const from_type *_iter = (const from_type *)(begin);\
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const from_type *_end = (const from_type *)(end);\
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Py_ssize_t n = (_end) - (_iter); \
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const from_type *_unrolled_end = \
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_iter + _Py_SIZE_ROUND_DOWN(n, 4); \
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@ -964,21 +964,21 @@ findchar(const void *s, int kind,
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if ((Py_UCS1) ch != ch)
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return -1;
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if (direction > 0)
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return ucs1lib_find_char((Py_UCS1 *) s, size, (Py_UCS1) ch);
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return ucs1lib_find_char((const Py_UCS1 *) s, size, (Py_UCS1) ch);
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else
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return ucs1lib_rfind_char((Py_UCS1 *) s, size, (Py_UCS1) ch);
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return ucs1lib_rfind_char((const Py_UCS1 *) s, size, (Py_UCS1) ch);
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case PyUnicode_2BYTE_KIND:
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if ((Py_UCS2) ch != ch)
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return -1;
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if (direction > 0)
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return ucs2lib_find_char((Py_UCS2 *) s, size, (Py_UCS2) ch);
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return ucs2lib_find_char((const Py_UCS2 *) s, size, (Py_UCS2) ch);
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else
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return ucs2lib_rfind_char((Py_UCS2 *) s, size, (Py_UCS2) ch);
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return ucs2lib_rfind_char((const Py_UCS2 *) s, size, (Py_UCS2) ch);
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case PyUnicode_4BYTE_KIND:
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if (direction > 0)
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return ucs4lib_find_char((Py_UCS4 *) s, size, ch);
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return ucs4lib_find_char((const Py_UCS4 *) s, size, ch);
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else
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return ucs4lib_rfind_char((Py_UCS4 *) s, size, ch);
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return ucs4lib_rfind_char((const Py_UCS4 *) s, size, ch);
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default:
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Py_UNREACHABLE();
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}
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@ -3420,7 +3420,7 @@ PyUnicode_Decode(const char *s,
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/* Decode via the codec registry */
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buffer = NULL;
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if (PyBuffer_FillInfo(&info, NULL, (void *)s, size, 1, PyBUF_FULL_RO) < 0)
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if (PyBuffer_FillInfo(&info, NULL, (const void *)s, size, 1, PyBUF_FULL_RO) < 0)
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goto onError;
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buffer = PyMemoryView_FromBuffer(&info);
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if (buffer == NULL)
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/* Help allocation */
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const char *_p = p;
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while (_p < aligned_end) {
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unsigned long value = *(unsigned long *) _p;
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unsigned long value = *(const unsigned long *) _p;
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if (value & ASCII_CHAR_MASK)
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break;
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_p += SIZEOF_LONG;
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@ -5472,7 +5472,7 @@ PyUnicode_DecodeUTF32Stateful(const char *s,
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PyObject *errorHandler = NULL;
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PyObject *exc = NULL;
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q = (unsigned char *)s;
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q = (const unsigned char *)s;
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e = q + size;
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if (byteorder)
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@ -5797,7 +5797,7 @@ PyUnicode_DecodeUTF16Stateful(const char *s,
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PyObject *exc = NULL;
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const char *encoding;
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q = (unsigned char *)s;
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q = (const unsigned char *)s;
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e = q + size;
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if (byteorder)
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@ -6726,7 +6726,7 @@ PyUnicode_DecodeLatin1(const char *s,
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const char *errors)
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{
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/* Latin-1 is equivalent to the first 256 ordinals in Unicode. */
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return _PyUnicode_FromUCS1((unsigned char*)s, size);
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return _PyUnicode_FromUCS1((const unsigned char*)s, size);
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}
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/* create or adjust a UnicodeEncodeError */
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@ -13803,7 +13803,7 @@ _PyUnicodeWriter_WriteASCIIString(_PyUnicodeWriter *writer,
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if (len == -1)
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len = strlen(ascii);
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assert(ucs1lib_find_max_char((Py_UCS1*)ascii, (Py_UCS1*)ascii + len) < 128);
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assert(ucs1lib_find_max_char((const Py_UCS1*)ascii, (const Py_UCS1*)ascii + len) < 128);
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if (writer->buffer == NULL && !writer->overallocate) {
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PyObject *str;
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@ -13862,7 +13862,7 @@ _PyUnicodeWriter_WriteLatin1String(_PyUnicodeWriter *writer,
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{
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Py_UCS4 maxchar;
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maxchar = ucs1lib_find_max_char((Py_UCS1*)str, (Py_UCS1*)str + len);
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maxchar = ucs1lib_find_max_char((const Py_UCS1*)str, (const Py_UCS1*)str + len);
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if (_PyUnicodeWriter_Prepare(writer, len, maxchar) == -1)
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return -1;
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unicode_write_cstr(writer->buffer, writer->pos, str, len);
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@ -5440,7 +5440,7 @@ dtrace_function_entry(PyFrameObject *f)
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funcname = PyUnicode_AsUTF8(f->f_code->co_name);
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lineno = PyCode_Addr2Line(f->f_code, f->f_lasti);
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PyDTrace_FUNCTION_ENTRY((char *)filename, (char *)funcname, lineno);
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PyDTrace_FUNCTION_ENTRY(filename, funcname, lineno);
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}
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static void
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@ -5454,7 +5454,7 @@ dtrace_function_return(PyFrameObject *f)
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funcname = PyUnicode_AsUTF8(f->f_code->co_name);
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lineno = PyCode_Addr2Line(f->f_code, f->f_lasti);
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PyDTrace_FUNCTION_RETURN((char *)filename, (char *)funcname, lineno);
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PyDTrace_FUNCTION_RETURN(filename, funcname, lineno);
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}
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/* DTrace equivalent of maybe_call_line_trace. */
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@ -5486,7 +5486,7 @@ maybe_dtrace_line(PyFrameObject *frame,
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co_name = PyUnicode_AsUTF8(frame->f_code->co_name);
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if (!co_name)
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co_name = "?";
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PyDTrace_LINE((char *)co_filename, (char *)co_name, line);
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PyDTrace_LINE(co_filename, co_name, line);
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}
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*instr_prev = frame->f_lasti;
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}
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@ -734,7 +734,7 @@ r_byte(RFILE *p)
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else {
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const char *ptr = r_string(1, p);
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if (ptr != NULL)
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c = *(unsigned char *) ptr;
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c = *(const unsigned char *) ptr;
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}
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return c;
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}
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@ -366,7 +366,7 @@ static PyHash_FuncDef PyHash_Func = {fnv, "fnv", 8 * SIZEOF_PY_HASH_T,
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static uint64_t
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siphash24(uint64_t k0, uint64_t k1, const void *src, Py_ssize_t src_sz) {
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uint64_t b = (uint64_t)src_sz << 56;
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const uint8_t *in = (uint8_t*)src;
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const uint8_t *in = (const uint8_t*)src;
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uint64_t v0 = k0 ^ 0x736f6d6570736575ULL;
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uint64_t v1 = k1 ^ 0x646f72616e646f6dULL;
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@ -204,7 +204,7 @@ PySys_Audit(const char *event, const char *argFormat, ...)
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/* Dtrace USDT point */
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if (dtrace) {
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PyDTrace_AUDIT((char *)event, (void *)eventArgs);
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PyDTrace_AUDIT(event, (void *)eventArgs);
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}
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/* Call interpreter hooks */
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