| /* bytes object implementation */ |
| |
| #define PY_SSIZE_T_CLEAN |
| |
| #include "Python.h" |
| |
| #include "bytes_methods.h" |
| #include "pystrhex.h" |
| #include <stddef.h> |
| |
| /*[clinic input] |
| class bytes "PyBytesObject*" "&PyBytes_Type" |
| [clinic start generated code]*/ |
| /*[clinic end generated code: output=da39a3ee5e6b4b0d input=1a1d9102afc1b00c]*/ |
| |
| #include "clinic/bytesobject.c.h" |
| |
| #ifdef COUNT_ALLOCS |
| Py_ssize_t null_strings, one_strings; |
| #endif |
| |
| static PyBytesObject *characters[UCHAR_MAX + 1]; |
| static PyBytesObject *nullstring; |
| |
| /* PyBytesObject_SIZE gives the basic size of a string; any memory allocation |
| for a string of length n should request PyBytesObject_SIZE + n bytes. |
| |
| Using PyBytesObject_SIZE instead of sizeof(PyBytesObject) saves |
| 3 bytes per string allocation on a typical system. |
| */ |
| #define PyBytesObject_SIZE (offsetof(PyBytesObject, ob_sval) + 1) |
| |
| /* Forward declaration */ |
| Py_LOCAL_INLINE(Py_ssize_t) _PyBytesWriter_GetSize(_PyBytesWriter *writer, |
| char *str); |
| |
| /* |
| For PyBytes_FromString(), the parameter `str' points to a null-terminated |
| string containing exactly `size' bytes. |
| |
| For PyBytes_FromStringAndSize(), the parameter the parameter `str' is |
| either NULL or else points to a string containing at least `size' bytes. |
| For PyBytes_FromStringAndSize(), the string in the `str' parameter does |
| not have to be null-terminated. (Therefore it is safe to construct a |
| substring by calling `PyBytes_FromStringAndSize(origstring, substrlen)'.) |
| If `str' is NULL then PyBytes_FromStringAndSize() will allocate `size+1' |
| bytes (setting the last byte to the null terminating character) and you can |
| fill in the data yourself. If `str' is non-NULL then the resulting |
| PyBytes object must be treated as immutable and you must not fill in nor |
| alter the data yourself, since the strings may be shared. |
| |
| The PyObject member `op->ob_size', which denotes the number of "extra |
| items" in a variable-size object, will contain the number of bytes |
| allocated for string data, not counting the null terminating character. |
| It is therefore equal to the `size' parameter (for |
| PyBytes_FromStringAndSize()) or the length of the string in the `str' |
| parameter (for PyBytes_FromString()). |
| */ |
| static PyObject * |
| _PyBytes_FromSize(Py_ssize_t size, int use_calloc) |
| { |
| PyBytesObject *op; |
| assert(size >= 0); |
| |
| if (size == 0 && (op = nullstring) != NULL) { |
| #ifdef COUNT_ALLOCS |
| null_strings++; |
| #endif |
| Py_INCREF(op); |
| return (PyObject *)op; |
| } |
| |
| if ((size_t)size > (size_t)PY_SSIZE_T_MAX - PyBytesObject_SIZE) { |
| PyErr_SetString(PyExc_OverflowError, |
| "byte string is too large"); |
| return NULL; |
| } |
| |
| /* Inline PyObject_NewVar */ |
| if (use_calloc) |
| op = (PyBytesObject *)PyObject_Calloc(1, PyBytesObject_SIZE + size); |
| else |
| op = (PyBytesObject *)PyObject_Malloc(PyBytesObject_SIZE + size); |
| if (op == NULL) |
| return PyErr_NoMemory(); |
| (void)PyObject_INIT_VAR(op, &PyBytes_Type, size); |
| op->ob_shash = -1; |
| if (!use_calloc) |
| op->ob_sval[size] = '\0'; |
| /* empty byte string singleton */ |
| if (size == 0) { |
| nullstring = op; |
| Py_INCREF(op); |
| } |
| return (PyObject *) op; |
| } |
| |
| PyObject * |
| PyBytes_FromStringAndSize(const char *str, Py_ssize_t size) |
| { |
| PyBytesObject *op; |
| if (size < 0) { |
| PyErr_SetString(PyExc_SystemError, |
| "Negative size passed to PyBytes_FromStringAndSize"); |
| return NULL; |
| } |
| if (size == 1 && str != NULL && |
| (op = characters[*str & UCHAR_MAX]) != NULL) |
| { |
| #ifdef COUNT_ALLOCS |
| one_strings++; |
| #endif |
| Py_INCREF(op); |
| return (PyObject *)op; |
| } |
| |
| op = (PyBytesObject *)_PyBytes_FromSize(size, 0); |
| if (op == NULL) |
| return NULL; |
| if (str == NULL) |
| return (PyObject *) op; |
| |
| Py_MEMCPY(op->ob_sval, str, size); |
| /* share short strings */ |
| if (size == 1) { |
| characters[*str & UCHAR_MAX] = op; |
| Py_INCREF(op); |
| } |
| return (PyObject *) op; |
| } |
| |
| PyObject * |
| PyBytes_FromString(const char *str) |
| { |
| size_t size; |
| PyBytesObject *op; |
| |
| assert(str != NULL); |
| size = strlen(str); |
| if (size > PY_SSIZE_T_MAX - PyBytesObject_SIZE) { |
| PyErr_SetString(PyExc_OverflowError, |
| "byte string is too long"); |
| return NULL; |
| } |
| if (size == 0 && (op = nullstring) != NULL) { |
| #ifdef COUNT_ALLOCS |
| null_strings++; |
| #endif |
| Py_INCREF(op); |
| return (PyObject *)op; |
| } |
| if (size == 1 && (op = characters[*str & UCHAR_MAX]) != NULL) { |
| #ifdef COUNT_ALLOCS |
| one_strings++; |
| #endif |
| Py_INCREF(op); |
| return (PyObject *)op; |
| } |
| |
| /* Inline PyObject_NewVar */ |
| op = (PyBytesObject *)PyObject_MALLOC(PyBytesObject_SIZE + size); |
| if (op == NULL) |
| return PyErr_NoMemory(); |
| (void)PyObject_INIT_VAR(op, &PyBytes_Type, size); |
| op->ob_shash = -1; |
| Py_MEMCPY(op->ob_sval, str, size+1); |
| /* share short strings */ |
| if (size == 0) { |
| nullstring = op; |
| Py_INCREF(op); |
| } else if (size == 1) { |
| characters[*str & UCHAR_MAX] = op; |
| Py_INCREF(op); |
| } |
| return (PyObject *) op; |
| } |
| |
| PyObject * |
| PyBytes_FromFormatV(const char *format, va_list vargs) |
| { |
| char *s; |
| const char *f; |
| const char *p; |
| Py_ssize_t prec; |
| int longflag; |
| int size_tflag; |
| /* Longest 64-bit formatted numbers: |
| - "18446744073709551615\0" (21 bytes) |
| - "-9223372036854775808\0" (21 bytes) |
| Decimal takes the most space (it isn't enough for octal.) |
| |
| Longest 64-bit pointer representation: |
| "0xffffffffffffffff\0" (19 bytes). */ |
| char buffer[21]; |
| _PyBytesWriter writer; |
| |
| _PyBytesWriter_Init(&writer); |
| |
| s = _PyBytesWriter_Alloc(&writer, strlen(format)); |
| if (s == NULL) |
| return NULL; |
| writer.overallocate = 1; |
| |
| #define WRITE_BYTES(str) \ |
| do { \ |
| s = _PyBytesWriter_WriteBytes(&writer, s, (str), strlen(str)); \ |
| if (s == NULL) \ |
| goto error; \ |
| } while (0) |
| |
| for (f = format; *f; f++) { |
| if (*f != '%') { |
| *s++ = *f; |
| continue; |
| } |
| |
| p = f++; |
| |
| /* ignore the width (ex: 10 in "%10s") */ |
| while (Py_ISDIGIT(*f)) |
| f++; |
| |
| /* parse the precision (ex: 10 in "%.10s") */ |
| prec = 0; |
| if (*f == '.') { |
| f++; |
| for (; Py_ISDIGIT(*f); f++) { |
| prec = (prec * 10) + (*f - '0'); |
| } |
| } |
| |
| while (*f && *f != '%' && !Py_ISALPHA(*f)) |
| f++; |
| |
| /* handle the long flag ('l'), but only for %ld and %lu. |
| others can be added when necessary. */ |
| longflag = 0; |
| if (*f == 'l' && (f[1] == 'd' || f[1] == 'u')) { |
| longflag = 1; |
| ++f; |
| } |
| |
| /* handle the size_t flag ('z'). */ |
| size_tflag = 0; |
| if (*f == 'z' && (f[1] == 'd' || f[1] == 'u')) { |
| size_tflag = 1; |
| ++f; |
| } |
| |
| /* substract bytes preallocated for the format string |
| (ex: 2 for "%s") */ |
| writer.min_size -= (f - p + 1); |
| |
| switch (*f) { |
| case 'c': |
| { |
| int c = va_arg(vargs, int); |
| if (c < 0 || c > 255) { |
| PyErr_SetString(PyExc_OverflowError, |
| "PyBytes_FromFormatV(): %c format " |
| "expects an integer in range [0; 255]"); |
| goto error; |
| } |
| writer.min_size++; |
| *s++ = (unsigned char)c; |
| break; |
| } |
| |
| case 'd': |
| if (longflag) |
| sprintf(buffer, "%ld", va_arg(vargs, long)); |
| else if (size_tflag) |
| sprintf(buffer, "%" PY_FORMAT_SIZE_T "d", |
| va_arg(vargs, Py_ssize_t)); |
| else |
| sprintf(buffer, "%d", va_arg(vargs, int)); |
| assert(strlen(buffer) < sizeof(buffer)); |
| WRITE_BYTES(buffer); |
| break; |
| |
| case 'u': |
| if (longflag) |
| sprintf(buffer, "%lu", |
| va_arg(vargs, unsigned long)); |
| else if (size_tflag) |
| sprintf(buffer, "%" PY_FORMAT_SIZE_T "u", |
| va_arg(vargs, size_t)); |
| else |
| sprintf(buffer, "%u", |
| va_arg(vargs, unsigned int)); |
| assert(strlen(buffer) < sizeof(buffer)); |
| WRITE_BYTES(buffer); |
| break; |
| |
| case 'i': |
| sprintf(buffer, "%i", va_arg(vargs, int)); |
| assert(strlen(buffer) < sizeof(buffer)); |
| WRITE_BYTES(buffer); |
| break; |
| |
| case 'x': |
| sprintf(buffer, "%x", va_arg(vargs, int)); |
| assert(strlen(buffer) < sizeof(buffer)); |
| WRITE_BYTES(buffer); |
| break; |
| |
| case 's': |
| { |
| Py_ssize_t i; |
| |
| p = va_arg(vargs, const char*); |
| i = strlen(p); |
| if (prec > 0 && i > prec) |
| i = prec; |
| s = _PyBytesWriter_WriteBytes(&writer, s, p, i); |
| if (s == NULL) |
| goto error; |
| break; |
| } |
| |
| case 'p': |
| sprintf(buffer, "%p", va_arg(vargs, void*)); |
| assert(strlen(buffer) < sizeof(buffer)); |
| /* %p is ill-defined: ensure leading 0x. */ |
| if (buffer[1] == 'X') |
| buffer[1] = 'x'; |
| else if (buffer[1] != 'x') { |
| memmove(buffer+2, buffer, strlen(buffer)+1); |
| buffer[0] = '0'; |
| buffer[1] = 'x'; |
| } |
| WRITE_BYTES(buffer); |
| break; |
| |
| case '%': |
| writer.min_size++; |
| *s++ = '%'; |
| break; |
| |
| default: |
| if (*f == 0) { |
| /* fix min_size if we reached the end of the format string */ |
| writer.min_size++; |
| } |
| |
| /* invalid format string: copy unformatted string and exit */ |
| WRITE_BYTES(p); |
| return _PyBytesWriter_Finish(&writer, s); |
| } |
| } |
| |
| #undef WRITE_BYTES |
| |
| return _PyBytesWriter_Finish(&writer, s); |
| |
| error: |
| _PyBytesWriter_Dealloc(&writer); |
| return NULL; |
| } |
| |
| PyObject * |
| PyBytes_FromFormat(const char *format, ...) |
| { |
| PyObject* ret; |
| va_list vargs; |
| |
| #ifdef HAVE_STDARG_PROTOTYPES |
| va_start(vargs, format); |
| #else |
| va_start(vargs); |
| #endif |
| ret = PyBytes_FromFormatV(format, vargs); |
| va_end(vargs); |
| return ret; |
| } |
| |
| /* Helpers for formatstring */ |
| |
| Py_LOCAL_INLINE(PyObject *) |
| getnextarg(PyObject *args, Py_ssize_t arglen, Py_ssize_t *p_argidx) |
| { |
| Py_ssize_t argidx = *p_argidx; |
| if (argidx < arglen) { |
| (*p_argidx)++; |
| if (arglen < 0) |
| return args; |
| else |
| return PyTuple_GetItem(args, argidx); |
| } |
| PyErr_SetString(PyExc_TypeError, |
| "not enough arguments for format string"); |
| return NULL; |
| } |
| |
| /* Format codes |
| * F_LJUST '-' |
| * F_SIGN '+' |
| * F_BLANK ' ' |
| * F_ALT '#' |
| * F_ZERO '0' |
| */ |
| #define F_LJUST (1<<0) |
| #define F_SIGN (1<<1) |
| #define F_BLANK (1<<2) |
| #define F_ALT (1<<3) |
| #define F_ZERO (1<<4) |
| |
| /* Returns a new reference to a PyBytes object, or NULL on failure. */ |
| |
| static char* |
| formatfloat(PyObject *v, int flags, int prec, int type, |
| PyObject **p_result, _PyBytesWriter *writer, char *str) |
| { |
| char *p; |
| PyObject *result; |
| double x; |
| size_t len; |
| |
| x = PyFloat_AsDouble(v); |
| if (x == -1.0 && PyErr_Occurred()) { |
| PyErr_Format(PyExc_TypeError, "float argument required, " |
| "not %.200s", Py_TYPE(v)->tp_name); |
| return NULL; |
| } |
| |
| if (prec < 0) |
| prec = 6; |
| |
| p = PyOS_double_to_string(x, type, prec, |
| (flags & F_ALT) ? Py_DTSF_ALT : 0, NULL); |
| |
| if (p == NULL) |
| return NULL; |
| |
| len = strlen(p); |
| if (writer != NULL) { |
| str = _PyBytesWriter_Prepare(writer, str, len); |
| if (str == NULL) |
| return NULL; |
| Py_MEMCPY(str, p, len); |
| str += len; |
| return str; |
| } |
| |
| result = PyBytes_FromStringAndSize(p, len); |
| PyMem_Free(p); |
| *p_result = result; |
| return str; |
| } |
| |
| static PyObject * |
| formatlong(PyObject *v, int flags, int prec, int type) |
| { |
| PyObject *result, *iobj; |
| if (type == 'i') |
| type = 'd'; |
| if (PyLong_Check(v)) |
| return _PyUnicode_FormatLong(v, flags & F_ALT, prec, type); |
| if (PyNumber_Check(v)) { |
| /* make sure number is a type of integer for o, x, and X */ |
| if (type == 'o' || type == 'x' || type == 'X') |
| iobj = PyNumber_Index(v); |
| else |
| iobj = PyNumber_Long(v); |
| if (iobj == NULL) { |
| if (!PyErr_ExceptionMatches(PyExc_TypeError)) |
| return NULL; |
| } |
| else if (!PyLong_Check(iobj)) |
| Py_CLEAR(iobj); |
| if (iobj != NULL) { |
| result = _PyUnicode_FormatLong(iobj, flags & F_ALT, prec, type); |
| Py_DECREF(iobj); |
| return result; |
| } |
| } |
| PyErr_Format(PyExc_TypeError, |
| "%%%c format: %s is required, not %.200s", type, |
| (type == 'o' || type == 'x' || type == 'X') ? "an integer" |
| : "a number", |
| Py_TYPE(v)->tp_name); |
| return NULL; |
| } |
| |
| static int |
| byte_converter(PyObject *arg, char *p) |
| { |
| if (PyBytes_Check(arg) && PyBytes_Size(arg) == 1) { |
| *p = PyBytes_AS_STRING(arg)[0]; |
| return 1; |
| } |
| else if (PyByteArray_Check(arg) && PyByteArray_Size(arg) == 1) { |
| *p = PyByteArray_AS_STRING(arg)[0]; |
| return 1; |
| } |
| else { |
| PyObject *iobj; |
| long ival; |
| int overflow; |
| /* make sure number is a type of integer */ |
| if (PyLong_Check(arg)) { |
| ival = PyLong_AsLongAndOverflow(arg, &overflow); |
| } |
| else { |
| iobj = PyNumber_Index(arg); |
| if (iobj == NULL) { |
| if (!PyErr_ExceptionMatches(PyExc_TypeError)) |
| return 0; |
| goto onError; |
| } |
| ival = PyLong_AsLongAndOverflow(iobj, &overflow); |
| Py_DECREF(iobj); |
| } |
| if (!overflow && ival == -1 && PyErr_Occurred()) |
| goto onError; |
| if (overflow || !(0 <= ival && ival <= 255)) { |
| PyErr_SetString(PyExc_OverflowError, |
| "%c arg not in range(256)"); |
| return 0; |
| } |
| *p = (char)ival; |
| return 1; |
| } |
| onError: |
| PyErr_SetString(PyExc_TypeError, |
| "%c requires an integer in range(256) or a single byte"); |
| return 0; |
| } |
| |
| static PyObject * |
| format_obj(PyObject *v, const char **pbuf, Py_ssize_t *plen) |
| { |
| PyObject *func, *result; |
| _Py_IDENTIFIER(__bytes__); |
| /* is it a bytes object? */ |
| if (PyBytes_Check(v)) { |
| *pbuf = PyBytes_AS_STRING(v); |
| *plen = PyBytes_GET_SIZE(v); |
| Py_INCREF(v); |
| return v; |
| } |
| if (PyByteArray_Check(v)) { |
| *pbuf = PyByteArray_AS_STRING(v); |
| *plen = PyByteArray_GET_SIZE(v); |
| Py_INCREF(v); |
| return v; |
| } |
| /* does it support __bytes__? */ |
| func = _PyObject_LookupSpecial(v, &PyId___bytes__); |
| if (func != NULL) { |
| result = PyObject_CallFunctionObjArgs(func, NULL); |
| Py_DECREF(func); |
| if (result == NULL) |
| return NULL; |
| if (!PyBytes_Check(result)) { |
| PyErr_Format(PyExc_TypeError, |
| "__bytes__ returned non-bytes (type %.200s)", |
| Py_TYPE(result)->tp_name); |
| Py_DECREF(result); |
| return NULL; |
| } |
| *pbuf = PyBytes_AS_STRING(result); |
| *plen = PyBytes_GET_SIZE(result); |
| return result; |
| } |
| PyErr_Format(PyExc_TypeError, |
| "%%b requires bytes, or an object that implements __bytes__, not '%.100s'", |
| Py_TYPE(v)->tp_name); |
| return NULL; |
| } |
| |
| /* fmt%(v1,v2,...) is roughly equivalent to sprintf(fmt, v1, v2, ...) */ |
| |
| PyObject * |
| _PyBytes_FormatEx(const char *format, Py_ssize_t format_len, |
| PyObject *args, int use_bytearray) |
| { |
| const char *fmt; |
| char *res; |
| Py_ssize_t arglen, argidx; |
| Py_ssize_t fmtcnt; |
| int args_owned = 0; |
| PyObject *dict = NULL; |
| _PyBytesWriter writer; |
| |
| if (args == NULL) { |
| PyErr_BadInternalCall(); |
| return NULL; |
| } |
| fmt = format; |
| fmtcnt = format_len; |
| |
| _PyBytesWriter_Init(&writer); |
| writer.use_bytearray = use_bytearray; |
| |
| res = _PyBytesWriter_Alloc(&writer, fmtcnt); |
| if (res == NULL) |
| return NULL; |
| if (!use_bytearray) |
| writer.overallocate = 1; |
| |
| if (PyTuple_Check(args)) { |
| arglen = PyTuple_GET_SIZE(args); |
| argidx = 0; |
| } |
| else { |
| arglen = -1; |
| argidx = -2; |
| } |
| if (Py_TYPE(args)->tp_as_mapping && Py_TYPE(args)->tp_as_mapping->mp_subscript && |
| !PyTuple_Check(args) && !PyBytes_Check(args) && !PyUnicode_Check(args) && |
| !PyByteArray_Check(args)) { |
| dict = args; |
| } |
| |
| while (--fmtcnt >= 0) { |
| if (*fmt != '%') { |
| Py_ssize_t len; |
| char *pos; |
| |
| pos = strchr(fmt + 1, '%'); |
| if (pos != NULL) |
| len = pos - fmt; |
| else |
| len = format_len - (fmt - format); |
| assert(len != 0); |
| |
| Py_MEMCPY(res, fmt, len); |
| res += len; |
| fmt += len; |
| fmtcnt -= (len - 1); |
| } |
| else { |
| /* Got a format specifier */ |
| int flags = 0; |
| Py_ssize_t width = -1; |
| int prec = -1; |
| int c = '\0'; |
| int fill; |
| PyObject *v = NULL; |
| PyObject *temp = NULL; |
| const char *pbuf = NULL; |
| int sign; |
| Py_ssize_t len = 0; |
| char onechar; /* For byte_converter() */ |
| Py_ssize_t alloc; |
| #ifdef Py_DEBUG |
| char *before; |
| #endif |
| |
| fmt++; |
| if (*fmt == '(') { |
| const char *keystart; |
| Py_ssize_t keylen; |
| PyObject *key; |
| int pcount = 1; |
| |
| if (dict == NULL) { |
| PyErr_SetString(PyExc_TypeError, |
| "format requires a mapping"); |
| goto error; |
| } |
| ++fmt; |
| --fmtcnt; |
| keystart = fmt; |
| /* Skip over balanced parentheses */ |
| while (pcount > 0 && --fmtcnt >= 0) { |
| if (*fmt == ')') |
| --pcount; |
| else if (*fmt == '(') |
| ++pcount; |
| fmt++; |
| } |
| keylen = fmt - keystart - 1; |
| if (fmtcnt < 0 || pcount > 0) { |
| PyErr_SetString(PyExc_ValueError, |
| "incomplete format key"); |
| goto error; |
| } |
| key = PyBytes_FromStringAndSize(keystart, |
| keylen); |
| if (key == NULL) |
| goto error; |
| if (args_owned) { |
| Py_DECREF(args); |
| args_owned = 0; |
| } |
| args = PyObject_GetItem(dict, key); |
| Py_DECREF(key); |
| if (args == NULL) { |
| goto error; |
| } |
| args_owned = 1; |
| arglen = -1; |
| argidx = -2; |
| } |
| |
| /* Parse flags. Example: "%+i" => flags=F_SIGN. */ |
| while (--fmtcnt >= 0) { |
| switch (c = *fmt++) { |
| case '-': flags |= F_LJUST; continue; |
| case '+': flags |= F_SIGN; continue; |
| case ' ': flags |= F_BLANK; continue; |
| case '#': flags |= F_ALT; continue; |
| case '0': flags |= F_ZERO; continue; |
| } |
| break; |
| } |
| |
| /* Parse width. Example: "%10s" => width=10 */ |
| if (c == '*') { |
| v = getnextarg(args, arglen, &argidx); |
| if (v == NULL) |
| goto error; |
| if (!PyLong_Check(v)) { |
| PyErr_SetString(PyExc_TypeError, |
| "* wants int"); |
| goto error; |
| } |
| width = PyLong_AsSsize_t(v); |
| if (width == -1 && PyErr_Occurred()) |
| goto error; |
| if (width < 0) { |
| flags |= F_LJUST; |
| width = -width; |
| } |
| if (--fmtcnt >= 0) |
| c = *fmt++; |
| } |
| else if (c >= 0 && isdigit(c)) { |
| width = c - '0'; |
| while (--fmtcnt >= 0) { |
| c = Py_CHARMASK(*fmt++); |
| if (!isdigit(c)) |
| break; |
| if (width > (PY_SSIZE_T_MAX - ((int)c - '0')) / 10) { |
| PyErr_SetString( |
| PyExc_ValueError, |
| "width too big"); |
| goto error; |
| } |
| width = width*10 + (c - '0'); |
| } |
| } |
| |
| /* Parse precision. Example: "%.3f" => prec=3 */ |
| if (c == '.') { |
| prec = 0; |
| if (--fmtcnt >= 0) |
| c = *fmt++; |
| if (c == '*') { |
| v = getnextarg(args, arglen, &argidx); |
| if (v == NULL) |
| goto error; |
| if (!PyLong_Check(v)) { |
| PyErr_SetString( |
| PyExc_TypeError, |
| "* wants int"); |
| goto error; |
| } |
| prec = _PyLong_AsInt(v); |
| if (prec == -1 && PyErr_Occurred()) |
| goto error; |
| if (prec < 0) |
| prec = 0; |
| if (--fmtcnt >= 0) |
| c = *fmt++; |
| } |
| else if (c >= 0 && isdigit(c)) { |
| prec = c - '0'; |
| while (--fmtcnt >= 0) { |
| c = Py_CHARMASK(*fmt++); |
| if (!isdigit(c)) |
| break; |
| if (prec > (INT_MAX - ((int)c - '0')) / 10) { |
| PyErr_SetString( |
| PyExc_ValueError, |
| "prec too big"); |
| goto error; |
| } |
| prec = prec*10 + (c - '0'); |
| } |
| } |
| } /* prec */ |
| if (fmtcnt >= 0) { |
| if (c == 'h' || c == 'l' || c == 'L') { |
| if (--fmtcnt >= 0) |
| c = *fmt++; |
| } |
| } |
| if (fmtcnt < 0) { |
| PyErr_SetString(PyExc_ValueError, |
| "incomplete format"); |
| goto error; |
| } |
| if (c != '%') { |
| v = getnextarg(args, arglen, &argidx); |
| if (v == NULL) |
| goto error; |
| } |
| |
| if (fmtcnt < 0) { |
| /* last writer: disable writer overallocation */ |
| writer.overallocate = 0; |
| } |
| |
| sign = 0; |
| fill = ' '; |
| switch (c) { |
| case '%': |
| *res++ = '%'; |
| continue; |
| |
| case 'r': |
| // %r is only for 2/3 code; 3 only code should use %a |
| case 'a': |
| temp = PyObject_ASCII(v); |
| if (temp == NULL) |
| goto error; |
| assert(PyUnicode_IS_ASCII(temp)); |
| pbuf = (const char *)PyUnicode_1BYTE_DATA(temp); |
| len = PyUnicode_GET_LENGTH(temp); |
| if (prec >= 0 && len > prec) |
| len = prec; |
| break; |
| |
| case 's': |
| // %s is only for 2/3 code; 3 only code should use %b |
| case 'b': |
| temp = format_obj(v, &pbuf, &len); |
| if (temp == NULL) |
| goto error; |
| if (prec >= 0 && len > prec) |
| len = prec; |
| break; |
| |
| case 'i': |
| case 'd': |
| case 'u': |
| case 'o': |
| case 'x': |
| case 'X': |
| if (PyLong_CheckExact(v) |
| && width == -1 && prec == -1 |
| && !(flags & (F_SIGN | F_BLANK)) |
| && c != 'X') |
| { |
| /* Fast path */ |
| int alternate = flags & F_ALT; |
| int base; |
| |
| switch(c) |
| { |
| default: |
| assert(0 && "'type' not in [diuoxX]"); |
| case 'd': |
| case 'i': |
| case 'u': |
| base = 10; |
| break; |
| case 'o': |
| base = 8; |
| break; |
| case 'x': |
| case 'X': |
| base = 16; |
| break; |
| } |
| |
| /* Fast path */ |
| writer.min_size -= 2; /* size preallocated for "%d" */ |
| res = _PyLong_FormatBytesWriter(&writer, res, |
| v, base, alternate); |
| if (res == NULL) |
| goto error; |
| continue; |
| } |
| |
| temp = formatlong(v, flags, prec, c); |
| if (!temp) |
| goto error; |
| assert(PyUnicode_IS_ASCII(temp)); |
| pbuf = (const char *)PyUnicode_1BYTE_DATA(temp); |
| len = PyUnicode_GET_LENGTH(temp); |
| sign = 1; |
| if (flags & F_ZERO) |
| fill = '0'; |
| break; |
| |
| case 'e': |
| case 'E': |
| case 'f': |
| case 'F': |
| case 'g': |
| case 'G': |
| if (width == -1 && prec == -1 |
| && !(flags & (F_SIGN | F_BLANK))) |
| { |
| /* Fast path */ |
| writer.min_size -= 2; /* size preallocated for "%f" */ |
| res = formatfloat(v, flags, prec, c, NULL, &writer, res); |
| if (res == NULL) |
| goto error; |
| continue; |
| } |
| |
| if (!formatfloat(v, flags, prec, c, &temp, NULL, res)) |
| goto error; |
| pbuf = PyBytes_AS_STRING(temp); |
| len = PyBytes_GET_SIZE(temp); |
| sign = 1; |
| if (flags & F_ZERO) |
| fill = '0'; |
| break; |
| |
| case 'c': |
| pbuf = &onechar; |
| len = byte_converter(v, &onechar); |
| if (!len) |
| goto error; |
| if (width == -1) { |
| /* Fast path */ |
| *res++ = onechar; |
| continue; |
| } |
| break; |
| |
| default: |
| PyErr_Format(PyExc_ValueError, |
| "unsupported format character '%c' (0x%x) " |
| "at index %zd", |
| c, c, |
| (Py_ssize_t)(fmt - 1 - format)); |
| goto error; |
| } |
| |
| if (sign) { |
| if (*pbuf == '-' || *pbuf == '+') { |
| sign = *pbuf++; |
| len--; |
| } |
| else if (flags & F_SIGN) |
| sign = '+'; |
| else if (flags & F_BLANK) |
| sign = ' '; |
| else |
| sign = 0; |
| } |
| if (width < len) |
| width = len; |
| |
| alloc = width; |
| if (sign != 0 && len == width) |
| alloc++; |
| /* 2: size preallocated for %s */ |
| if (alloc > 2) { |
| res = _PyBytesWriter_Prepare(&writer, res, alloc - 2); |
| if (res == NULL) |
| goto error; |
| } |
| #ifdef Py_DEBUG |
| before = res; |
| #endif |
| |
| /* Write the sign if needed */ |
| if (sign) { |
| if (fill != ' ') |
| *res++ = sign; |
| if (width > len) |
| width--; |
| } |
| |
| /* Write the numeric prefix for "x", "X" and "o" formats |
| if the alternate form is used. |
| For example, write "0x" for the "%#x" format. */ |
| if ((flags & F_ALT) && (c == 'x' || c == 'X')) { |
| assert(pbuf[0] == '0'); |
| assert(pbuf[1] == c); |
| if (fill != ' ') { |
| *res++ = *pbuf++; |
| *res++ = *pbuf++; |
| } |
| width -= 2; |
| if (width < 0) |
| width = 0; |
| len -= 2; |
| } |
| |
| /* Pad left with the fill character if needed */ |
| if (width > len && !(flags & F_LJUST)) { |
| memset(res, fill, width - len); |
| res += (width - len); |
| width = len; |
| } |
| |
| /* If padding with spaces: write sign if needed and/or numeric |
| prefix if the alternate form is used */ |
| if (fill == ' ') { |
| if (sign) |
| *res++ = sign; |
| if ((flags & F_ALT) && |
| (c == 'x' || c == 'X')) { |
| assert(pbuf[0] == '0'); |
| assert(pbuf[1] == c); |
| *res++ = *pbuf++; |
| *res++ = *pbuf++; |
| } |
| } |
| |
| /* Copy bytes */ |
| Py_MEMCPY(res, pbuf, len); |
| res += len; |
| |
| /* Pad right with the fill character if needed */ |
| if (width > len) { |
| memset(res, ' ', width - len); |
| res += (width - len); |
| } |
| |
| if (dict && (argidx < arglen) && c != '%') { |
| PyErr_SetString(PyExc_TypeError, |
| "not all arguments converted during bytes formatting"); |
| Py_XDECREF(temp); |
| goto error; |
| } |
| Py_XDECREF(temp); |
| |
| #ifdef Py_DEBUG |
| /* check that we computed the exact size for this write */ |
| assert((res - before) == alloc); |
| #endif |
| } /* '%' */ |
| |
| /* If overallocation was disabled, ensure that it was the last |
| write. Otherwise, we missed an optimization */ |
| assert(writer.overallocate || fmtcnt < 0 || use_bytearray); |
| } /* until end */ |
| |
| if (argidx < arglen && !dict) { |
| PyErr_SetString(PyExc_TypeError, |
| "not all arguments converted during bytes formatting"); |
| goto error; |
| } |
| |
| if (args_owned) { |
| Py_DECREF(args); |
| } |
| return _PyBytesWriter_Finish(&writer, res); |
| |
| error: |
| _PyBytesWriter_Dealloc(&writer); |
| if (args_owned) { |
| Py_DECREF(args); |
| } |
| return NULL; |
| } |
| |
| /* =-= */ |
| |
| static void |
| bytes_dealloc(PyObject *op) |
| { |
| Py_TYPE(op)->tp_free(op); |
| } |
| |
| /* Unescape a backslash-escaped string. If unicode is non-zero, |
| the string is a u-literal. If recode_encoding is non-zero, |
| the string is UTF-8 encoded and should be re-encoded in the |
| specified encoding. */ |
| |
| static char * |
| _PyBytes_DecodeEscapeRecode(const char **s, const char *end, |
| const char *errors, const char *recode_encoding, |
| _PyBytesWriter *writer, char *p) |
| { |
| PyObject *u, *w; |
| const char* t; |
| |
| t = *s; |
| /* Decode non-ASCII bytes as UTF-8. */ |
| while (t < end && (*t & 0x80)) |
| t++; |
| u = PyUnicode_DecodeUTF8(*s, t - *s, errors); |
| if (u == NULL) |
| return NULL; |
| |
| /* Recode them in target encoding. */ |
| w = PyUnicode_AsEncodedString(u, recode_encoding, errors); |
| Py_DECREF(u); |
| if (w == NULL) |
| return NULL; |
| assert(PyBytes_Check(w)); |
| |
| /* Append bytes to output buffer. */ |
| writer->min_size--; /* substract 1 preallocated byte */ |
| p = _PyBytesWriter_WriteBytes(writer, p, |
| PyBytes_AS_STRING(w), |
| PyBytes_GET_SIZE(w)); |
| Py_DECREF(w); |
| if (p == NULL) |
| return NULL; |
| |
| *s = t; |
| return p; |
| } |
| |
| PyObject *PyBytes_DecodeEscape(const char *s, |
| Py_ssize_t len, |
| const char *errors, |
| Py_ssize_t unicode, |
| const char *recode_encoding) |
| { |
| int c; |
| char *p; |
| const char *end; |
| _PyBytesWriter writer; |
| |
| _PyBytesWriter_Init(&writer); |
| |
| p = _PyBytesWriter_Alloc(&writer, len); |
| if (p == NULL) |
| return NULL; |
| writer.overallocate = 1; |
| |
| end = s + len; |
| while (s < end) { |
| if (*s != '\\') { |
| non_esc: |
| if (!(recode_encoding && (*s & 0x80))) { |
| *p++ = *s++; |
| } |
| else { |
| /* non-ASCII character and need to recode */ |
| p = _PyBytes_DecodeEscapeRecode(&s, end, |
| errors, recode_encoding, |
| &writer, p); |
| if (p == NULL) |
| goto failed; |
| } |
| continue; |
| } |
| |
| s++; |
| if (s == end) { |
| PyErr_SetString(PyExc_ValueError, |
| "Trailing \\ in string"); |
| goto failed; |
| } |
| |
| switch (*s++) { |
| /* XXX This assumes ASCII! */ |
| case '\n': break; |
| case '\\': *p++ = '\\'; break; |
| case '\'': *p++ = '\''; break; |
| case '\"': *p++ = '\"'; break; |
| case 'b': *p++ = '\b'; break; |
| case 'f': *p++ = '\014'; break; /* FF */ |
| case 't': *p++ = '\t'; break; |
| case 'n': *p++ = '\n'; break; |
| case 'r': *p++ = '\r'; break; |
| case 'v': *p++ = '\013'; break; /* VT */ |
| case 'a': *p++ = '\007'; break; /* BEL, not classic C */ |
| case '0': case '1': case '2': case '3': |
| case '4': case '5': case '6': case '7': |
| c = s[-1] - '0'; |
| if (s < end && '0' <= *s && *s <= '7') { |
| c = (c<<3) + *s++ - '0'; |
| if (s < end && '0' <= *s && *s <= '7') |
| c = (c<<3) + *s++ - '0'; |
| } |
| *p++ = c; |
| break; |
| case 'x': |
| if (s+1 < end) { |
| int digit1, digit2; |
| digit1 = _PyLong_DigitValue[Py_CHARMASK(s[0])]; |
| digit2 = _PyLong_DigitValue[Py_CHARMASK(s[1])]; |
| if (digit1 < 16 && digit2 < 16) { |
| *p++ = (unsigned char)((digit1 << 4) + digit2); |
| s += 2; |
| break; |
| } |
| } |
| /* invalid hexadecimal digits */ |
| |
| if (!errors || strcmp(errors, "strict") == 0) { |
| PyErr_Format(PyExc_ValueError, |
| "invalid \\x escape at position %d", |
| s - 2 - (end - len)); |
| goto failed; |
| } |
| if (strcmp(errors, "replace") == 0) { |
| *p++ = '?'; |
| } else if (strcmp(errors, "ignore") == 0) |
| /* do nothing */; |
| else { |
| PyErr_Format(PyExc_ValueError, |
| "decoding error; unknown " |
| "error handling code: %.400s", |
| errors); |
| goto failed; |
| } |
| /* skip \x */ |
| if (s < end && Py_ISXDIGIT(s[0])) |
| s++; /* and a hexdigit */ |
| break; |
| |
| default: |
| *p++ = '\\'; |
| s--; |
| goto non_esc; /* an arbitrary number of unescaped |
| UTF-8 bytes may follow. */ |
| } |
| } |
| |
| return _PyBytesWriter_Finish(&writer, p); |
| |
| failed: |
| _PyBytesWriter_Dealloc(&writer); |
| return NULL; |
| } |
| |
| /* -------------------------------------------------------------------- */ |
| /* object api */ |
| |
| Py_ssize_t |
| PyBytes_Size(PyObject *op) |
| { |
| if (!PyBytes_Check(op)) { |
| PyErr_Format(PyExc_TypeError, |
| "expected bytes, %.200s found", Py_TYPE(op)->tp_name); |
| return -1; |
| } |
| return Py_SIZE(op); |
| } |
| |
| char * |
| PyBytes_AsString(PyObject *op) |
| { |
| if (!PyBytes_Check(op)) { |
| PyErr_Format(PyExc_TypeError, |
| "expected bytes, %.200s found", Py_TYPE(op)->tp_name); |
| return NULL; |
| } |
| return ((PyBytesObject *)op)->ob_sval; |
| } |
| |
| int |
| PyBytes_AsStringAndSize(PyObject *obj, |
| char **s, |
| Py_ssize_t *len) |
| { |
| if (s == NULL) { |
| PyErr_BadInternalCall(); |
| return -1; |
| } |
| |
| if (!PyBytes_Check(obj)) { |
| PyErr_Format(PyExc_TypeError, |
| "expected bytes, %.200s found", Py_TYPE(obj)->tp_name); |
| return -1; |
| } |
| |
| *s = PyBytes_AS_STRING(obj); |
| if (len != NULL) |
| *len = PyBytes_GET_SIZE(obj); |
| else if (strlen(*s) != (size_t)PyBytes_GET_SIZE(obj)) { |
| PyErr_SetString(PyExc_ValueError, |
| "embedded null byte"); |
| return -1; |
| } |
| return 0; |
| } |
| |
| /* -------------------------------------------------------------------- */ |
| /* Methods */ |
| |
| #include "stringlib/stringdefs.h" |
| |
| #include "stringlib/fastsearch.h" |
| #include "stringlib/count.h" |
| #include "stringlib/find.h" |
| #include "stringlib/join.h" |
| #include "stringlib/partition.h" |
| #include "stringlib/split.h" |
| #include "stringlib/ctype.h" |
| |
| #include "stringlib/transmogrify.h" |
| |
| PyObject * |
| PyBytes_Repr(PyObject *obj, int smartquotes) |
| { |
| PyBytesObject* op = (PyBytesObject*) obj; |
| Py_ssize_t i, length = Py_SIZE(op); |
| Py_ssize_t newsize, squotes, dquotes; |
| PyObject *v; |
| unsigned char quote, *s, *p; |
| |
| /* Compute size of output string */ |
| squotes = dquotes = 0; |
| newsize = 3; /* b'' */ |
| s = (unsigned char*)op->ob_sval; |
| for (i = 0; i < length; i++) { |
| Py_ssize_t incr = 1; |
| switch(s[i]) { |
| case '\'': squotes++; break; |
| case '"': dquotes++; break; |
| case '\\': case '\t': case '\n': case '\r': |
| incr = 2; break; /* \C */ |
| default: |
| if (s[i] < ' ' || s[i] >= 0x7f) |
| incr = 4; /* \xHH */ |
| } |
| if (newsize > PY_SSIZE_T_MAX - incr) |
| goto overflow; |
| newsize += incr; |
| } |
| quote = '\''; |
| if (smartquotes && squotes && !dquotes) |
| quote = '"'; |
| if (squotes && quote == '\'') { |
| if (newsize > PY_SSIZE_T_MAX - squotes) |
| goto overflow; |
| newsize += squotes; |
| } |
| |
| v = PyUnicode_New(newsize, 127); |
| if (v == NULL) { |
| return NULL; |
| } |
| p = PyUnicode_1BYTE_DATA(v); |
| |
| *p++ = 'b', *p++ = quote; |
| for (i = 0; i < length; i++) { |
| unsigned char c = op->ob_sval[i]; |
| if (c == quote || c == '\\') |
| *p++ = '\\', *p++ = c; |
| else if (c == '\t') |
| *p++ = '\\', *p++ = 't'; |
| else if (c == '\n') |
| *p++ = '\\', *p++ = 'n'; |
| else if (c == '\r') |
| *p++ = '\\', *p++ = 'r'; |
| else if (c < ' ' || c >= 0x7f) { |
| *p++ = '\\'; |
| *p++ = 'x'; |
| *p++ = Py_hexdigits[(c & 0xf0) >> 4]; |
| *p++ = Py_hexdigits[c & 0xf]; |
| } |
| else |
| *p++ = c; |
| } |
| *p++ = quote; |
| assert(_PyUnicode_CheckConsistency(v, 1)); |
| return v; |
| |
| overflow: |
| PyErr_SetString(PyExc_OverflowError, |
| "bytes object is too large to make repr"); |
| return NULL; |
| } |
| |
| static PyObject * |
| bytes_repr(PyObject *op) |
| { |
| return PyBytes_Repr(op, 1); |
| } |
| |
| static PyObject * |
| bytes_str(PyObject *op) |
| { |
| if (Py_BytesWarningFlag) { |
| if (PyErr_WarnEx(PyExc_BytesWarning, |
| "str() on a bytes instance", 1)) |
| return NULL; |
| } |
| return bytes_repr(op); |
| } |
| |
| static Py_ssize_t |
| bytes_length(PyBytesObject *a) |
| { |
| return Py_SIZE(a); |
| } |
| |
| /* This is also used by PyBytes_Concat() */ |
| static PyObject * |
| bytes_concat(PyObject *a, PyObject *b) |
| { |
| Py_ssize_t size; |
| Py_buffer va, vb; |
| PyObject *result = NULL; |
| |
| va.len = -1; |
| vb.len = -1; |
| if (PyObject_GetBuffer(a, &va, PyBUF_SIMPLE) != 0 || |
| PyObject_GetBuffer(b, &vb, PyBUF_SIMPLE) != 0) { |
| PyErr_Format(PyExc_TypeError, "can't concat %.100s to %.100s", |
| Py_TYPE(a)->tp_name, Py_TYPE(b)->tp_name); |
| goto done; |
| } |
| |
| /* Optimize end cases */ |
| if (va.len == 0 && PyBytes_CheckExact(b)) { |
| result = b; |
| Py_INCREF(result); |
| goto done; |
| } |
| if (vb.len == 0 && PyBytes_CheckExact(a)) { |
| result = a; |
| Py_INCREF(result); |
| goto done; |
| } |
| |
| size = va.len + vb.len; |
| if (size < 0) { |
| PyErr_NoMemory(); |
| goto done; |
| } |
| |
| result = PyBytes_FromStringAndSize(NULL, size); |
| if (result != NULL) { |
| memcpy(PyBytes_AS_STRING(result), va.buf, va.len); |
| memcpy(PyBytes_AS_STRING(result) + va.len, vb.buf, vb.len); |
| } |
| |
| done: |
| if (va.len != -1) |
| PyBuffer_Release(&va); |
| if (vb.len != -1) |
| PyBuffer_Release(&vb); |
| return result; |
| } |
| |
| static PyObject * |
| bytes_repeat(PyBytesObject *a, Py_ssize_t n) |
| { |
| Py_ssize_t i; |
| Py_ssize_t j; |
| Py_ssize_t size; |
| PyBytesObject *op; |
| size_t nbytes; |
| if (n < 0) |
| n = 0; |
| /* watch out for overflows: the size can overflow int, |
| * and the # of bytes needed can overflow size_t |
| */ |
| if (n > 0 && Py_SIZE(a) > PY_SSIZE_T_MAX / n) { |
| PyErr_SetString(PyExc_OverflowError, |
| "repeated bytes are too long"); |
| return NULL; |
| } |
| size = Py_SIZE(a) * n; |
| if (size == Py_SIZE(a) && PyBytes_CheckExact(a)) { |
| Py_INCREF(a); |
| return (PyObject *)a; |
| } |
| nbytes = (size_t)size; |
| if (nbytes + PyBytesObject_SIZE <= nbytes) { |
| PyErr_SetString(PyExc_OverflowError, |
| "repeated bytes are too long"); |
| return NULL; |
| } |
| op = (PyBytesObject *)PyObject_MALLOC(PyBytesObject_SIZE + nbytes); |
| if (op == NULL) |
| return PyErr_NoMemory(); |
| (void)PyObject_INIT_VAR(op, &PyBytes_Type, size); |
| op->ob_shash = -1; |
| op->ob_sval[size] = '\0'; |
| if (Py_SIZE(a) == 1 && n > 0) { |
| memset(op->ob_sval, a->ob_sval[0] , n); |
| return (PyObject *) op; |
| } |
| i = 0; |
| if (i < size) { |
| Py_MEMCPY(op->ob_sval, a->ob_sval, Py_SIZE(a)); |
| i = Py_SIZE(a); |
| } |
| while (i < size) { |
| j = (i <= size-i) ? i : size-i; |
| Py_MEMCPY(op->ob_sval+i, op->ob_sval, j); |
| i += j; |
| } |
| return (PyObject *) op; |
| } |
| |
| static int |
| bytes_contains(PyObject *self, PyObject *arg) |
| { |
| Py_ssize_t ival = PyNumber_AsSsize_t(arg, PyExc_ValueError); |
| if (ival == -1 && PyErr_Occurred()) { |
| Py_buffer varg; |
| Py_ssize_t pos; |
| PyErr_Clear(); |
| if (PyObject_GetBuffer(arg, &varg, PyBUF_SIMPLE) != 0) |
| return -1; |
| pos = stringlib_find(PyBytes_AS_STRING(self), Py_SIZE(self), |
| varg.buf, varg.len, 0); |
| PyBuffer_Release(&varg); |
| return pos >= 0; |
| } |
| if (ival < 0 || ival >= 256) { |
| PyErr_SetString(PyExc_ValueError, "byte must be in range(0, 256)"); |
| return -1; |
| } |
| |
| return memchr(PyBytes_AS_STRING(self), (int) ival, Py_SIZE(self)) != NULL; |
| } |
| |
| static PyObject * |
| bytes_item(PyBytesObject *a, Py_ssize_t i) |
| { |
| if (i < 0 || i >= Py_SIZE(a)) { |
| PyErr_SetString(PyExc_IndexError, "index out of range"); |
| return NULL; |
| } |
| return PyLong_FromLong((unsigned char)a->ob_sval[i]); |
| } |
| |
| Py_LOCAL(int) |
| bytes_compare_eq(PyBytesObject *a, PyBytesObject *b) |
| { |
| int cmp; |
| Py_ssize_t len; |
| |
| len = Py_SIZE(a); |
| if (Py_SIZE(b) != len) |
| return 0; |
| |
| if (a->ob_sval[0] != b->ob_sval[0]) |
| return 0; |
| |
| cmp = memcmp(a->ob_sval, b->ob_sval, len); |
| return (cmp == 0); |
| } |
| |
| static PyObject* |
| bytes_richcompare(PyBytesObject *a, PyBytesObject *b, int op) |
| { |
| int c; |
| Py_ssize_t len_a, len_b; |
| Py_ssize_t min_len; |
| PyObject *result; |
| int rc; |
| |
| /* Make sure both arguments are strings. */ |
| if (!(PyBytes_Check(a) && PyBytes_Check(b))) { |
| if (Py_BytesWarningFlag && (op == Py_EQ || op == Py_NE)) { |
| rc = PyObject_IsInstance((PyObject*)a, |
| (PyObject*)&PyUnicode_Type); |
| if (!rc) |
| rc = PyObject_IsInstance((PyObject*)b, |
| (PyObject*)&PyUnicode_Type); |
| if (rc < 0) |
| return NULL; |
| if (rc) { |
| if (PyErr_WarnEx(PyExc_BytesWarning, |
| "Comparison between bytes and string", 1)) |
| return NULL; |
| } |
| else { |
| rc = PyObject_IsInstance((PyObject*)a, |
| (PyObject*)&PyLong_Type); |
| if (!rc) |
| rc = PyObject_IsInstance((PyObject*)b, |
| (PyObject*)&PyLong_Type); |
| if (rc < 0) |
| return NULL; |
| if (rc) { |
| if (PyErr_WarnEx(PyExc_BytesWarning, |
| "Comparison between bytes and int", 1)) |
| return NULL; |
| } |
| } |
| } |
| result = Py_NotImplemented; |
| } |
| else if (a == b) { |
| switch (op) { |
| case Py_EQ: |
| case Py_LE: |
| case Py_GE: |
| /* a string is equal to itself */ |
| result = Py_True; |
| break; |
| case Py_NE: |
| case Py_LT: |
| case Py_GT: |
| result = Py_False; |
| break; |
| default: |
| PyErr_BadArgument(); |
| return NULL; |
| } |
| } |
| else if (op == Py_EQ || op == Py_NE) { |
| int eq = bytes_compare_eq(a, b); |
| eq ^= (op == Py_NE); |
| result = eq ? Py_True : Py_False; |
| } |
| else { |
| len_a = Py_SIZE(a); |
| len_b = Py_SIZE(b); |
| min_len = Py_MIN(len_a, len_b); |
| if (min_len > 0) { |
| c = Py_CHARMASK(*a->ob_sval) - Py_CHARMASK(*b->ob_sval); |
| if (c == 0) |
| c = memcmp(a->ob_sval, b->ob_sval, min_len); |
| } |
| else |
| c = 0; |
| if (c == 0) |
| c = (len_a < len_b) ? -1 : (len_a > len_b) ? 1 : 0; |
| switch (op) { |
| case Py_LT: c = c < 0; break; |
| case Py_LE: c = c <= 0; break; |
| case Py_GT: c = c > 0; break; |
| case Py_GE: c = c >= 0; break; |
| default: |
| PyErr_BadArgument(); |
| return NULL; |
| } |
| result = c ? Py_True : Py_False; |
| } |
| |
| Py_INCREF(result); |
| return result; |
| } |
| |
| static Py_hash_t |
| bytes_hash(PyBytesObject *a) |
| { |
| if (a->ob_shash == -1) { |
| /* Can't fail */ |
| a->ob_shash = _Py_HashBytes(a->ob_sval, Py_SIZE(a)); |
| } |
| return a->ob_shash; |
| } |
| |
| static PyObject* |
| bytes_subscript(PyBytesObject* self, PyObject* item) |
| { |
| if (PyIndex_Check(item)) { |
| Py_ssize_t i = PyNumber_AsSsize_t(item, PyExc_IndexError); |
| if (i == -1 && PyErr_Occurred()) |
| return NULL; |
| if (i < 0) |
| i += PyBytes_GET_SIZE(self); |
| if (i < 0 || i >= PyBytes_GET_SIZE(self)) { |
| PyErr_SetString(PyExc_IndexError, |
| "index out of range"); |
| return NULL; |
| } |
| return PyLong_FromLong((unsigned char)self->ob_sval[i]); |
| } |
| else if (PySlice_Check(item)) { |
| Py_ssize_t start, stop, step, slicelength, cur, i; |
| char* source_buf; |
| char* result_buf; |
| PyObject* result; |
| |
| if (PySlice_GetIndicesEx(item, |
| PyBytes_GET_SIZE(self), |
| &start, &stop, &step, &slicelength) < 0) { |
| return NULL; |
| } |
| |
| if (slicelength <= 0) { |
| return PyBytes_FromStringAndSize("", 0); |
| } |
| else if (start == 0 && step == 1 && |
| slicelength == PyBytes_GET_SIZE(self) && |
| PyBytes_CheckExact(self)) { |
| Py_INCREF(self); |
| return (PyObject *)self; |
| } |
| else if (step == 1) { |
| return PyBytes_FromStringAndSize( |
| PyBytes_AS_STRING(self) + start, |
| slicelength); |
| } |
| else { |
| source_buf = PyBytes_AS_STRING(self); |
| result = PyBytes_FromStringAndSize(NULL, slicelength); |
| if (result == NULL) |
| return NULL; |
| |
| result_buf = PyBytes_AS_STRING(result); |
| for (cur = start, i = 0; i < slicelength; |
| cur += step, i++) { |
| result_buf[i] = source_buf[cur]; |
| } |
| |
| return result; |
| } |
| } |
| else { |
| PyErr_Format(PyExc_TypeError, |
| "byte indices must be integers or slices, not %.200s", |
| Py_TYPE(item)->tp_name); |
| return NULL; |
| } |
| } |
| |
| static int |
| bytes_buffer_getbuffer(PyBytesObject *self, Py_buffer *view, int flags) |
| { |
| return PyBuffer_FillInfo(view, (PyObject*)self, (void *)self->ob_sval, Py_SIZE(self), |
| 1, flags); |
| } |
| |
| static PySequenceMethods bytes_as_sequence = { |
| (lenfunc)bytes_length, /*sq_length*/ |
| (binaryfunc)bytes_concat, /*sq_concat*/ |
| (ssizeargfunc)bytes_repeat, /*sq_repeat*/ |
| (ssizeargfunc)bytes_item, /*sq_item*/ |
| 0, /*sq_slice*/ |
| 0, /*sq_ass_item*/ |
| 0, /*sq_ass_slice*/ |
| (objobjproc)bytes_contains /*sq_contains*/ |
| }; |
| |
| static PyMappingMethods bytes_as_mapping = { |
| (lenfunc)bytes_length, |
| (binaryfunc)bytes_subscript, |
| 0, |
| }; |
| |
| static PyBufferProcs bytes_as_buffer = { |
| (getbufferproc)bytes_buffer_getbuffer, |
| NULL, |
| }; |
| |
| |
| #define LEFTSTRIP 0 |
| #define RIGHTSTRIP 1 |
| #define BOTHSTRIP 2 |
| |
| /*[clinic input] |
| bytes.split |
| |
| sep: object = None |
| The delimiter according which to split the bytes. |
| None (the default value) means split on ASCII whitespace characters |
| (space, tab, return, newline, formfeed, vertical tab). |
| maxsplit: Py_ssize_t = -1 |
| Maximum number of splits to do. |
| -1 (the default value) means no limit. |
| |
| Return a list of the sections in the bytes, using sep as the delimiter. |
| [clinic start generated code]*/ |
| |
| static PyObject * |
| bytes_split_impl(PyBytesObject*self, PyObject *sep, Py_ssize_t maxsplit) |
| /*[clinic end generated code: output=8bde44dacb36ef2e input=8b809b39074abbfa]*/ |
| { |
| Py_ssize_t len = PyBytes_GET_SIZE(self), n; |
| const char *s = PyBytes_AS_STRING(self), *sub; |
| Py_buffer vsub; |
| PyObject *list; |
| |
| if (maxsplit < 0) |
| maxsplit = PY_SSIZE_T_MAX; |
| if (sep == Py_None) |
| return stringlib_split_whitespace((PyObject*) self, s, len, maxsplit); |
| if (PyObject_GetBuffer(sep, &vsub, PyBUF_SIMPLE) != 0) |
| return NULL; |
| sub = vsub.buf; |
| n = vsub.len; |
| |
| list = stringlib_split((PyObject*) self, s, len, sub, n, maxsplit); |
| PyBuffer_Release(&vsub); |
| return list; |
| } |
| |
| /*[clinic input] |
| bytes.partition |
| |
| self: self(type="PyBytesObject *") |
| sep: Py_buffer |
| / |
| |
| Partition the bytes into three parts using the given separator. |
| |
| This will search for the separator sep in the bytes. If the separator is found, |
| returns a 3-tuple containing the part before the separator, the separator |
| itself, and the part after it. |
| |
| If the separator is not found, returns a 3-tuple containing the original bytes |
| object and two empty bytes objects. |
| [clinic start generated code]*/ |
| |
| static PyObject * |
| bytes_partition_impl(PyBytesObject *self, Py_buffer *sep) |
| /*[clinic end generated code: output=f532b392a17ff695 input=bc855dc63ca949de]*/ |
| { |
| return stringlib_partition( |
| (PyObject*) self, |
| PyBytes_AS_STRING(self), PyBytes_GET_SIZE(self), |
| sep->obj, (const char *)sep->buf, sep->len |
| ); |
| } |
| |
| /*[clinic input] |
| bytes.rpartition |
| |
| self: self(type="PyBytesObject *") |
| sep: Py_buffer |
| / |
| |
| Partition the bytes into three parts using the given separator. |
| |
| This will search for the separator sep in the bytes, starting and the end. If |
| the separator is found, returns a 3-tuple containing the part before the |
| separator, the separator itself, and the part after it. |
| |
| If the separator is not found, returns a 3-tuple containing two empty bytes |
| objects and the original bytes object. |
| [clinic start generated code]*/ |
| |
| static PyObject * |
| bytes_rpartition_impl(PyBytesObject *self, Py_buffer *sep) |
| /*[clinic end generated code: output=191b114cbb028e50 input=6588fff262a9170e]*/ |
| { |
| return stringlib_rpartition( |
| (PyObject*) self, |
| PyBytes_AS_STRING(self), PyBytes_GET_SIZE(self), |
| sep->obj, (const char *)sep->buf, sep->len |
| ); |
| } |
| |
| /*[clinic input] |
| bytes.rsplit = bytes.split |
| |
| Return a list of the sections in the bytes, using sep as the delimiter. |
| |
| Splitting is done starting at the end of the bytes and working to the front. |
| [clinic start generated code]*/ |
| |
| static PyObject * |
| bytes_rsplit_impl(PyBytesObject*self, PyObject *sep, Py_ssize_t maxsplit) |
| /*[clinic end generated code: output=0b6570b977911d88 input=0f86c9f28f7d7b7b]*/ |
| { |
| Py_ssize_t len = PyBytes_GET_SIZE(self), n; |
| const char *s = PyBytes_AS_STRING(self), *sub; |
| Py_buffer vsub; |
| PyObject *list; |
| |
| if (maxsplit < 0) |
| maxsplit = PY_SSIZE_T_MAX; |
| if (sep == Py_None) |
| return stringlib_rsplit_whitespace((PyObject*) self, s, len, maxsplit); |
| if (PyObject_GetBuffer(sep, &vsub, PyBUF_SIMPLE) != 0) |
| return NULL; |
| sub = vsub.buf; |
| n = vsub.len; |
| |
| list = stringlib_rsplit((PyObject*) self, s, len, sub, n, maxsplit); |
| PyBuffer_Release(&vsub); |
| return list; |
| } |
| |
| |
| /*[clinic input] |
| bytes.join |
| |
| iterable_of_bytes: object |
| / |
| |
| Concatenate any number of bytes objects. |
| |
| The bytes whose method is called is inserted in between each pair. |
| |
| The result is returned as a new bytes object. |
| |
| Example: b'.'.join([b'ab', b'pq', b'rs']) -> b'ab.pq.rs'. |
| [clinic start generated code]*/ |
| |
| static PyObject * |
| bytes_join(PyBytesObject*self, PyObject *iterable_of_bytes) |
| /*[clinic end generated code: output=634aff14764ff997 input=7fe377b95bd549d2]*/ |
| { |
| return stringlib_bytes_join((PyObject*)self, iterable_of_bytes); |
| } |
| |
| PyObject * |
| _PyBytes_Join(PyObject *sep, PyObject *x) |
| { |
| assert(sep != NULL && PyBytes_Check(sep)); |
| assert(x != NULL); |
| return bytes_join((PyBytesObject*)sep, x); |
| } |
| |
| /* helper macro to fixup start/end slice values */ |
| #define ADJUST_INDICES(start, end, len) \ |
| if (end > len) \ |
| end = len; \ |
| else if (end < 0) { \ |
| end += len; \ |
| if (end < 0) \ |
| end = 0; \ |
| } \ |
| if (start < 0) { \ |
| start += len; \ |
| if (start < 0) \ |
| start = 0; \ |
| } |
| |
| Py_LOCAL_INLINE(Py_ssize_t) |
| bytes_find_internal(PyBytesObject *self, PyObject *args, int dir) |
| { |
| PyObject *subobj; |
| char byte; |
| Py_buffer subbuf; |
| const char *sub; |
| Py_ssize_t len, sub_len; |
| Py_ssize_t start=0, end=PY_SSIZE_T_MAX; |
| Py_ssize_t res; |
| |
| if (!stringlib_parse_args_finds_byte("find/rfind/index/rindex", |
| args, &subobj, &byte, &start, &end)) |
| return -2; |
| |
| if (subobj) { |
| if (PyObject_GetBuffer(subobj, &subbuf, PyBUF_SIMPLE) != 0) |
| return -2; |
| |
| sub = subbuf.buf; |
| sub_len = subbuf.len; |
| } |
| else { |
| sub = &byte; |
| sub_len = 1; |
| } |
| len = PyBytes_GET_SIZE(self); |
| |
| ADJUST_INDICES(start, end, len); |
| if (end - start < sub_len) |
| res = -1; |
| else if (sub_len == 1) { |
| if (dir > 0) |
| res = stringlib_find_char( |
| PyBytes_AS_STRING(self) + start, end - start, |
| *sub); |
| else |
| res = stringlib_rfind_char( |
| PyBytes_AS_STRING(self) + start, end - start, |
| *sub); |
| if (res >= 0) |
| res += start; |
| } |
| else { |
| if (dir > 0) |
| res = stringlib_find_slice( |
| PyBytes_AS_STRING(self), len, |
| sub, sub_len, start, end); |
| else |
| res = stringlib_rfind_slice( |
| PyBytes_AS_STRING(self), len, |
| sub, sub_len, start, end); |
| } |
| |
| if (subobj) |
| PyBuffer_Release(&subbuf); |
| |
| return res; |
| } |
| |
| |
| PyDoc_STRVAR(find__doc__, |
| "B.find(sub[, start[, end]]) -> int\n\ |
| \n\ |
| Return the lowest index in B where substring sub is found,\n\ |
| such that sub is contained within B[start:end]. Optional\n\ |
| arguments start and end are interpreted as in slice notation.\n\ |
| \n\ |
| Return -1 on failure."); |
| |
| static PyObject * |
| bytes_find(PyBytesObject *self, PyObject *args) |
| { |
| Py_ssize_t result = bytes_find_internal(self, args, +1); |
| if (result == -2) |
| return NULL; |
| return PyLong_FromSsize_t(result); |
| } |
| |
| |
| PyDoc_STRVAR(index__doc__, |
| "B.index(sub[, start[, end]]) -> int\n\ |
| \n\ |
| Like B.find() but raise ValueError when the substring is not found."); |
| |
| static PyObject * |
| bytes_index(PyBytesObject *self, PyObject *args) |
| { |
| Py_ssize_t result = bytes_find_internal(self, args, +1); |
| if (result == -2) |
| return NULL; |
| if (result == -1) { |
| PyErr_SetString(PyExc_ValueError, |
| "substring not found"); |
| return NULL; |
| } |
| return PyLong_FromSsize_t(result); |
| } |
| |
| |
| PyDoc_STRVAR(rfind__doc__, |
| "B.rfind(sub[, start[, end]]) -> int\n\ |
| \n\ |
| Return the highest index in B where substring sub is found,\n\ |
| such that sub is contained within B[start:end]. Optional\n\ |
| arguments start and end are interpreted as in slice notation.\n\ |
| \n\ |
| Return -1 on failure."); |
| |
| static PyObject * |
| bytes_rfind(PyBytesObject *self, PyObject *args) |
| { |
| Py_ssize_t result = bytes_find_internal(self, args, -1); |
| if (result == -2) |
| return NULL; |
| return PyLong_FromSsize_t(result); |
| } |
| |
| |
| PyDoc_STRVAR(rindex__doc__, |
| "B.rindex(sub[, start[, end]]) -> int\n\ |
| \n\ |
| Like B.rfind() but raise ValueError when the substring is not found."); |
| |
| static PyObject * |
| bytes_rindex(PyBytesObject *self, PyObject *args) |
| { |
| Py_ssize_t result = bytes_find_internal(self, args, -1); |
| if (result == -2) |
| return NULL; |
| if (result == -1) { |
| PyErr_SetString(PyExc_ValueError, |
| "substring not found"); |
| return NULL; |
| } |
| return PyLong_FromSsize_t(result); |
| } |
| |
| |
| Py_LOCAL_INLINE(PyObject *) |
| do_xstrip(PyBytesObject *self, int striptype, PyObject *sepobj) |
| { |
| Py_buffer vsep; |
| char *s = PyBytes_AS_STRING(self); |
| Py_ssize_t len = PyBytes_GET_SIZE(self); |
| char *sep; |
| Py_ssize_t seplen; |
| Py_ssize_t i, j; |
| |
| if (PyObject_GetBuffer(sepobj, &vsep, PyBUF_SIMPLE) != 0) |
| return NULL; |
| sep = vsep.buf; |
| seplen = vsep.len; |
| |
| i = 0; |
| if (striptype != RIGHTSTRIP) { |
| while (i < len && memchr(sep, Py_CHARMASK(s[i]), seplen)) { |
| i++; |
| } |
| } |
| |
| j = len; |
| if (striptype != LEFTSTRIP) { |
| do { |
| j--; |
| } while (j >= i && memchr(sep, Py_CHARMASK(s[j]), seplen)); |
| j++; |
| } |
| |
| PyBuffer_Release(&vsep); |
| |
| if (i == 0 && j == len && PyBytes_CheckExact(self)) { |
| Py_INCREF(self); |
| return (PyObject*)self; |
| } |
| else |
| return PyBytes_FromStringAndSize(s+i, j-i); |
| } |
| |
| |
| Py_LOCAL_INLINE(PyObject *) |
| do_strip(PyBytesObject *self, int striptype) |
| { |
| char *s = PyBytes_AS_STRING(self); |
| Py_ssize_t len = PyBytes_GET_SIZE(self), i, j; |
| |
| i = 0; |
| if (striptype != RIGHTSTRIP) { |
| while (i < len && Py_ISSPACE(s[i])) { |
| i++; |
| } |
| } |
| |
| j = len; |
| if (striptype != LEFTSTRIP) { |
| do { |
| j--; |
| } while (j >= i && Py_ISSPACE(s[j])); |
| j++; |
| } |
| |
| if (i == 0 && j == len && PyBytes_CheckExact(self)) { |
| Py_INCREF(self); |
| return (PyObject*)self; |
| } |
| else |
| return PyBytes_FromStringAndSize(s+i, j-i); |
| } |
| |
| |
| Py_LOCAL_INLINE(PyObject *) |
| do_argstrip(PyBytesObject *self, int striptype, PyObject *bytes) |
| { |
| if (bytes != NULL && bytes != Py_None) { |
| return do_xstrip(self, striptype, bytes); |
| } |
| return do_strip(self, striptype); |
| } |
| |
| /*[clinic input] |
| bytes.strip |
| |
| self: self(type="PyBytesObject *") |
| bytes: object = None |
| / |
| |
| Strip leading and trailing bytes contained in the argument. |
| |
| If the argument is omitted or None, strip leading and trailing ASCII whitespace. |
| [clinic start generated code]*/ |
| |
| static PyObject * |
| bytes_strip_impl(PyBytesObject *self, PyObject *bytes) |
| /*[clinic end generated code: output=c7c228d3bd104a1b input=37daa5fad1395d95]*/ |
| { |
| return do_argstrip(self, BOTHSTRIP, bytes); |
| } |
| |
| /*[clinic input] |
| bytes.lstrip |
| |
| self: self(type="PyBytesObject *") |
| bytes: object = None |
| / |
| |
| Strip leading bytes contained in the argument. |
| |
| If the argument is omitted or None, strip leading ASCII whitespace. |
| [clinic start generated code]*/ |
| |
| static PyObject * |
| bytes_lstrip_impl(PyBytesObject *self, PyObject *bytes) |
| /*[clinic end generated code: output=28602e586f524e82 input=88811b09dfbc2988]*/ |
| { |
| return do_argstrip(self, LEFTSTRIP, bytes); |
| } |
| |
| /*[clinic input] |
| bytes.rstrip |
| |
| self: self(type="PyBytesObject *") |
| bytes: object = None |
| / |
| |
| Strip trailing bytes contained in the argument. |
| |
| If the argument is omitted or None, strip trailing ASCII whitespace. |
| [clinic start generated code]*/ |
| |
| static PyObject * |
| bytes_rstrip_impl(PyBytesObject *self, PyObject *bytes) |
| /*[clinic end generated code: output=547e3815c95447da input=8f93c9cd361f0140]*/ |
| { |
| return do_argstrip(self, RIGHTSTRIP, bytes); |
| } |
| |
| |
| PyDoc_STRVAR(count__doc__, |
| "B.count(sub[, start[, end]]) -> int\n\ |
| \n\ |
| Return the number of non-overlapping occurrences of substring sub in\n\ |
| string B[start:end]. Optional arguments start and end are interpreted\n\ |
| as in slice notation."); |
| |
| static PyObject * |
| bytes_count(PyBytesObject *self, PyObject *args) |
| { |
| PyObject *sub_obj; |
| const char *str = PyBytes_AS_STRING(self), *sub; |
| Py_ssize_t sub_len; |
| char byte; |
| Py_ssize_t start = 0, end = PY_SSIZE_T_MAX; |
| |
| Py_buffer vsub; |
| PyObject *count_obj; |
| |
| if (!stringlib_parse_args_finds_byte("count", args, &sub_obj, &byte, |
| &start, &end)) |
| return NULL; |
| |
| if (sub_obj) { |
| if (PyObject_GetBuffer(sub_obj, &vsub, PyBUF_SIMPLE) != 0) |
| return NULL; |
| |
| sub = vsub.buf; |
| sub_len = vsub.len; |
| } |
| else { |
| sub = &byte; |
| sub_len = 1; |
| } |
| |
| ADJUST_INDICES(start, end, PyBytes_GET_SIZE(self)); |
| |
| count_obj = PyLong_FromSsize_t( |
| stringlib_count(str + start, end - start, sub, sub_len, PY_SSIZE_T_MAX) |
| ); |
| |
| if (sub_obj) |
| PyBuffer_Release(&vsub); |
| |
| return count_obj; |
| } |
| |
| |
| /*[clinic input] |
| bytes.translate |
| |
| self: self(type="PyBytesObject *") |
| table: object |
| Translation table, which must be a bytes object of length 256. |
| [ |
| deletechars: object |
| ] |
| / |
| |
| Return a copy with each character mapped by the given translation table. |
| |
| All characters occurring in the optional argument deletechars are removed. |
| The remaining characters are mapped through the given translation table. |
| [clinic start generated code]*/ |
| |
| static PyObject * |
| bytes_translate_impl(PyBytesObject *self, PyObject *table, int group_right_1, |
| PyObject *deletechars) |
| /*[clinic end generated code: output=233df850eb50bf8d input=d8fa5519d7cc4be7]*/ |
| { |
| char *input, *output; |
| Py_buffer table_view = {NULL, NULL}; |
| Py_buffer del_table_view = {NULL, NULL}; |
| const char *table_chars; |
| Py_ssize_t i, c, changed = 0; |
| PyObject *input_obj = (PyObject*)self; |
| const char *output_start, *del_table_chars=NULL; |
| Py_ssize_t inlen, tablen, dellen = 0; |
| PyObject *result; |
| int trans_table[256]; |
| |
| if (PyBytes_Check(table)) { |
| table_chars = PyBytes_AS_STRING(table); |
| tablen = PyBytes_GET_SIZE(table); |
| } |
| else if (table == Py_None) { |
| table_chars = NULL; |
| tablen = 256; |
| } |
| else { |
| if (PyObject_GetBuffer(table, &table_view, PyBUF_SIMPLE) != 0) |
| return NULL; |
| table_chars = table_view.buf; |
| tablen = table_view.len; |
| } |
| |
| if (tablen != 256) { |
| PyErr_SetString(PyExc_ValueError, |
| "translation table must be 256 characters long"); |
| PyBuffer_Release(&table_view); |
| return NULL; |
| } |
| |
| if (deletechars != NULL) { |
| if (PyBytes_Check(deletechars)) { |
| del_table_chars = PyBytes_AS_STRING(deletechars); |
| dellen = PyBytes_GET_SIZE(deletechars); |
| } |
| else { |
| if (PyObject_GetBuffer(deletechars, &del_table_view, PyBUF_SIMPLE) != 0) { |
| PyBuffer_Release(&table_view); |
| return NULL; |
| } |
| del_table_chars = del_table_view.buf; |
| dellen = del_table_view.len; |
| } |
| } |
| else { |
| del_table_chars = NULL; |
| dellen = 0; |
| } |
| |
| inlen = PyBytes_GET_SIZE(input_obj); |
| result = PyBytes_FromStringAndSize((char *)NULL, inlen); |
| if (result == NULL) { |
| PyBuffer_Release(&del_table_view); |
| PyBuffer_Release(&table_view); |
| return NULL; |
| } |
| output_start = output = PyBytes_AsString(result); |
| input = PyBytes_AS_STRING(input_obj); |
| |
| if (dellen == 0 && table_chars != NULL) { |
| /* If no deletions are required, use faster code */ |
| for (i = inlen; --i >= 0; ) { |
| c = Py_CHARMASK(*input++); |
| if (Py_CHARMASK((*output++ = table_chars[c])) != c) |
| changed = 1; |
| } |
| if (!changed && PyBytes_CheckExact(input_obj)) { |
| Py_INCREF(input_obj); |
| Py_DECREF(result); |
| result = input_obj; |
| } |
| PyBuffer_Release(&del_table_view); |
| PyBuffer_Release(&table_view); |
| return result; |
| } |
| |
| if (table_chars == NULL) { |
| for (i = 0; i < 256; i++) |
| trans_table[i] = Py_CHARMASK(i); |
| } else { |
| for (i = 0; i < 256; i++) |
| trans_table[i] = Py_CHARMASK(table_chars[i]); |
| } |
| PyBuffer_Release(&table_view); |
| |
| for (i = 0; i < dellen; i++) |
| trans_table[(int) Py_CHARMASK(del_table_chars[i])] = -1; |
| PyBuffer_Release(&del_table_view); |
| |
| for (i = inlen; --i >= 0; ) { |
| c = Py_CHARMASK(*input++); |
| if (trans_table[c] != -1) |
| if (Py_CHARMASK(*output++ = (char)trans_table[c]) == c) |
| continue; |
| changed = 1; |
| } |
| if (!changed && PyBytes_CheckExact(input_obj)) { |
| Py_DECREF(result); |
| Py_INCREF(input_obj); |
| return input_obj; |
| } |
| /* Fix the size of the resulting string */ |
| if (inlen > 0) |
| _PyBytes_Resize(&result, output - output_start); |
| return result; |
| } |
| |
| |
| /*[clinic input] |
| |
| @staticmethod |
| bytes.maketrans |
| |
| frm: Py_buffer |
| to: Py_buffer |
| / |
| |
| Return a translation table useable for the bytes or bytearray translate method. |
| |
| The returned table will be one where each byte in frm is mapped to the byte at |
| the same position in to. |
| |
| The bytes objects frm and to must be of the same length. |
| [clinic start generated code]*/ |
| |
| static PyObject * |
| bytes_maketrans_impl(Py_buffer *frm, Py_buffer *to) |
| /*[clinic end generated code: output=a36f6399d4b77f6f input=de7a8fc5632bb8f1]*/ |
| { |
| return _Py_bytes_maketrans(frm, to); |
| } |
| |
| /* find and count characters and substrings */ |
| |
| #define findchar(target, target_len, c) \ |
| ((char *)memchr((const void *)(target), c, target_len)) |
| |
| /* String ops must return a string. */ |
| /* If the object is subclass of string, create a copy */ |
| Py_LOCAL(PyBytesObject *) |
| return_self(PyBytesObject *self) |
| { |
| if (PyBytes_CheckExact(self)) { |
| Py_INCREF(self); |
| return self; |
| } |
| return (PyBytesObject *)PyBytes_FromStringAndSize( |
| PyBytes_AS_STRING(self), |
| PyBytes_GET_SIZE(self)); |
| } |
| |
| Py_LOCAL_INLINE(Py_ssize_t) |
| countchar(const char *target, Py_ssize_t target_len, char c, Py_ssize_t maxcount) |
| { |
| Py_ssize_t count=0; |
| const char *start=target; |
| const char *end=target+target_len; |
| |
| while ( (start=findchar(start, end-start, c)) != NULL ) { |
| count++; |
| if (count >= maxcount) |
| break; |
| start += 1; |
| } |
| return count; |
| } |
| |
| |
| /* Algorithms for different cases of string replacement */ |
| |
| /* len(self)>=1, from="", len(to)>=1, maxcount>=1 */ |
| Py_LOCAL(PyBytesObject *) |
| replace_interleave(PyBytesObject *self, |
| const char *to_s, Py_ssize_t to_len, |
| Py_ssize_t maxcount) |
| { |
| char *self_s, *result_s; |
| Py_ssize_t self_len, result_len; |
| Py_ssize_t count, i; |
| PyBytesObject *result; |
| |
| self_len = PyBytes_GET_SIZE(self); |
| |
| /* 1 at the end plus 1 after every character; |
| count = min(maxcount, self_len + 1) */ |
| if (maxcount <= self_len) |
| count = maxcount; |
| else |
| /* Can't overflow: self_len + 1 <= maxcount <= PY_SSIZE_T_MAX. */ |
| count = self_len + 1; |
| |
| /* Check for overflow */ |
| /* result_len = count * to_len + self_len; */ |
| assert(count > 0); |
| if (to_len > (PY_SSIZE_T_MAX - self_len) / count) { |
| PyErr_SetString(PyExc_OverflowError, |
| "replacement bytes are too long"); |
| return NULL; |
| } |
| result_len = count * to_len + self_len; |
| |
| if (! (result = (PyBytesObject *) |
| PyBytes_FromStringAndSize(NULL, result_len)) ) |
| return NULL; |
| |
| self_s = PyBytes_AS_STRING(self); |
| result_s = PyBytes_AS_STRING(result); |
| |
| if (to_len > 1) { |
| /* Lay the first one down (guaranteed this will occur) */ |
| Py_MEMCPY(result_s, to_s, to_len); |
| result_s += to_len; |
| count -= 1; |
| |
| for (i = 0; i < count; i++) { |
| *result_s++ = *self_s++; |
| Py_MEMCPY(result_s, to_s, to_len); |
| result_s += to_len; |
| } |
| } |
| else { |
| result_s[0] = to_s[0]; |
| result_s += to_len; |
| count -= 1; |
| for (i = 0; i < count; i++) { |
| *result_s++ = *self_s++; |
| result_s[0] = to_s[0]; |
| result_s += to_len; |
| } |
| } |
| |
| /* Copy the rest of the original string */ |
| Py_MEMCPY(result_s, self_s, self_len-i); |
| |
| return result; |
| } |
| |
| /* Special case for deleting a single character */ |
| /* len(self)>=1, len(from)==1, to="", maxcount>=1 */ |
| Py_LOCAL(PyBytesObject *) |
| replace_delete_single_character(PyBytesObject *self, |
| char from_c, Py_ssize_t maxcount) |
| { |
| char *self_s, *result_s; |
| char *start, *next, *end; |
| Py_ssize_t self_len, result_len; |
| Py_ssize_t count; |
| PyBytesObject *result; |
| |
| self_len = PyBytes_GET_SIZE(self); |
| self_s = PyBytes_AS_STRING(self); |
| |
| count = countchar(self_s, self_len, from_c, maxcount); |
| if (count == 0) { |
| return return_self(self); |
| } |
| |
| result_len = self_len - count; /* from_len == 1 */ |
| assert(result_len>=0); |
| |
| if ( (result = (PyBytesObject *) |
| PyBytes_FromStringAndSize(NULL, result_len)) == NULL) |
| return NULL; |
| result_s = PyBytes_AS_STRING(result); |
| |
| start = self_s; |
| end = self_s + self_len; |
| while (count-- > 0) { |
| next = findchar(start, end-start, from_c); |
| if (next == NULL) |
| break; |
| Py_MEMCPY(result_s, start, next-start); |
| result_s += (next-start); |
| start = next+1; |
| } |
| Py_MEMCPY(result_s, start, end-start); |
| |
| return result; |
| } |
| |
| /* len(self)>=1, len(from)>=2, to="", maxcount>=1 */ |
| |
| Py_LOCAL(PyBytesObject *) |
| replace_delete_substring(PyBytesObject *self, |
| const char *from_s, Py_ssize_t from_len, |
| Py_ssize_t maxcount) { |
| char *self_s, *result_s; |
| char *start, *next, *end; |
| Py_ssize_t self_len, result_len; |
| Py_ssize_t count, offset; |
| PyBytesObject *result; |
| |
| self_len = PyBytes_GET_SIZE(self); |
| self_s = PyBytes_AS_STRING(self); |
| |
| count = stringlib_count(self_s, self_len, |
| from_s, from_len, |
| maxcount); |
| |
| if (count == 0) { |
| /* no matches */ |
| return return_self(self); |
| } |
| |
| result_len = self_len - (count * from_len); |
| assert (result_len>=0); |
| |
| if ( (result = (PyBytesObject *) |
| PyBytes_FromStringAndSize(NULL, result_len)) == NULL ) |
| return NULL; |
| |
| result_s = PyBytes_AS_STRING(result); |
| |
| start = self_s; |
| end = self_s + self_len; |
| while (count-- > 0) { |
| offset = stringlib_find(start, end-start, |
| from_s, from_len, |
| 0); |
| if (offset == -1) |
| break; |
| next = start + offset; |
| |
| Py_MEMCPY(result_s, start, next-start); |
| |
| result_s += (next-start); |
| start = next+from_len; |
| } |
| Py_MEMCPY(result_s, start, end-start); |
| return result; |
| } |
| |
| /* len(self)>=1, len(from)==len(to)==1, maxcount>=1 */ |
| Py_LOCAL(PyBytesObject *) |
| replace_single_character_in_place(PyBytesObject *self, |
| char from_c, char to_c, |
| Py_ssize_t maxcount) |
| { |
| char *self_s, *result_s, *start, *end, *next; |
| Py_ssize_t self_len; |
| PyBytesObject *result; |
| |
| /* The result string will be the same size */ |
| self_s = PyBytes_AS_STRING(self); |
| self_len = PyBytes_GET_SIZE(self); |
| |
| next = findchar(self_s, self_len, from_c); |
| |
| if (next == NULL) { |
| /* No matches; return the original string */ |
| return return_self(self); |
| } |
| |
| /* Need to make a new string */ |
| result = (PyBytesObject *) PyBytes_FromStringAndSize(NULL, self_len); |
| if (result == NULL) |
| return NULL; |
| result_s = PyBytes_AS_STRING(result); |
| Py_MEMCPY(result_s, self_s, self_len); |
| |
| /* change everything in-place, starting with this one */ |
| start = result_s + (next-self_s); |
| *start = to_c; |
| start++; |
| end = result_s + self_len; |
| |
| while (--maxcount > 0) { |
| next = findchar(start, end-start, from_c); |
| if (next == NULL) |
| break; |
| *next = to_c; |
| start = next+1; |
| } |
| |
| return result; |
| } |
| |
| /* len(self)>=1, len(from)==len(to)>=2, maxcount>=1 */ |
| Py_LOCAL(PyBytesObject *) |
| replace_substring_in_place(PyBytesObject *self, |
| const char *from_s, Py_ssize_t from_len, |
| const char *to_s, Py_ssize_t to_len, |
| Py_ssize_t maxcount) |
| { |
| char *result_s, *start, *end; |
| char *self_s; |
| Py_ssize_t self_len, offset; |
| PyBytesObject *result; |
| |
| /* The result string will be the same size */ |
| |
| self_s = PyBytes_AS_STRING(self); |
| self_len = PyBytes_GET_SIZE(self); |
| |
| offset = stringlib_find(self_s, self_len, |
| from_s, from_len, |
| 0); |
| if (offset == -1) { |
| /* No matches; return the original string */ |
| return return_self(self); |
| } |
| |
| /* Need to make a new string */ |
| result = (PyBytesObject *) PyBytes_FromStringAndSize(NULL, self_len); |
| if (result == NULL) |
| return NULL; |
| result_s = PyBytes_AS_STRING(result); |
| Py_MEMCPY(result_s, self_s, self_len); |
| |
| /* change everything in-place, starting with this one */ |
| start = result_s + offset; |
| Py_MEMCPY(start, to_s, from_len); |
| start += from_len; |
| end = result_s + self_len; |
| |
| while ( --maxcount > 0) { |
| offset = stringlib_find(start, end-start, |
| from_s, from_len, |
| 0); |
| if (offset==-1) |
| break; |
| Py_MEMCPY(start+offset, to_s, from_len); |
| start += offset+from_len; |
| } |
| |
| return result; |
| } |
| |
| /* len(self)>=1, len(from)==1, len(to)>=2, maxcount>=1 */ |
| Py_LOCAL(PyBytesObject *) |
| replace_single_character(PyBytesObject *self, |
| char from_c, |
| const char *to_s, Py_ssize_t to_len, |
| Py_ssize_t maxcount) |
| { |
| char *self_s, *result_s; |
| char *start, *next, *end; |
| Py_ssize_t self_len, result_len; |
| Py_ssize_t count; |
| PyBytesObject *result; |
| |
| self_s = PyBytes_AS_STRING(self); |
| self_len = PyBytes_GET_SIZE(self); |
| |
| count = countchar(self_s, self_len, from_c, maxcount); |
| if (count == 0) { |
| /* no matches, return unchanged */ |
| return return_self(self); |
| } |
| |
| /* use the difference between current and new, hence the "-1" */ |
| /* result_len = self_len + count * (to_len-1) */ |
| assert(count > 0); |
| if (to_len - 1 > (PY_SSIZE_T_MAX - self_len) / count) { |
| PyErr_SetString(PyExc_OverflowError, |
| "replacement bytes are too long"); |
| return NULL; |
| } |
| result_len = self_len + count * (to_len - 1); |
| |
| if ( (result = (PyBytesObject *) |
| PyBytes_FromStringAndSize(NULL, result_len)) == NULL) |
| return NULL; |
| result_s = PyBytes_AS_STRING(result); |
| |
| start = self_s; |
| end = self_s + self_len; |
| while (count-- > 0) { |
| next = findchar(start, end-start, from_c); |
| if (next == NULL) |
| break; |
| |
| if (next == start) { |
| /* replace with the 'to' */ |
| Py_MEMCPY(result_s, to_s, to_len); |
| result_s += to_len; |
| start += 1; |
| } else { |
| /* copy the unchanged old then the 'to' */ |
| Py_MEMCPY(result_s, start, next-start); |
| result_s += (next-start); |
| Py_MEMCPY(result_s, to_s, to_len); |
| result_s += to_len; |
| start = next+1; |
| } |
| } |
| /* Copy the remainder of the remaining string */ |
| Py_MEMCPY(result_s, start, end-start); |
| |
| return result; |
| } |
| |
| /* len(self)>=1, len(from)>=2, len(to)>=2, maxcount>=1 */ |
| Py_LOCAL(PyBytesObject *) |
| replace_substring(PyBytesObject *self, |
| const char *from_s, Py_ssize_t from_len, |
| const char *to_s, Py_ssize_t to_len, |
| Py_ssize_t maxcount) { |
| char *self_s, *result_s; |
| char *start, *next, *end; |
| Py_ssize_t self_len, result_len; |
| Py_ssize_t count, offset; |
| PyBytesObject *result; |
| |
| self_s = PyBytes_AS_STRING(self); |
| self_len = PyBytes_GET_SIZE(self); |
| |
| count = stringlib_count(self_s, self_len, |
| from_s, from_len, |
| maxcount); |
| |
| if (count == 0) { |
| /* no matches, return unchanged */ |
| return return_self(self); |
| } |
| |
| /* Check for overflow */ |
| /* result_len = self_len + count * (to_len-from_len) */ |
| assert(count > 0); |
| if (to_len - from_len > (PY_SSIZE_T_MAX - self_len) / count) { |
| PyErr_SetString(PyExc_OverflowError, |
| "replacement bytes are too long"); |
| return NULL; |
| } |
| result_len = self_len + count * (to_len-from_len); |
| |
| if ( (result = (PyBytesObject *) |
| PyBytes_FromStringAndSize(NULL, result_len)) == NULL) |
| return NULL; |
| result_s = PyBytes_AS_STRING(result); |
| |
| start = self_s; |
| end = self_s + self_len; |
| while (count-- > 0) { |
| offset = stringlib_find(start, end-start, |
| from_s, from_len, |
| 0); |
| if (offset == -1) |
| break; |
| next = start+offset; |
| if (next == start) { |
| /* replace with the 'to' */ |
| Py_MEMCPY(result_s, to_s, to_len); |
| result_s += to_len; |
| start += from_len; |
| } else { |
| /* copy the unchanged old then the 'to' */ |
| Py_MEMCPY(result_s, start, next-start); |
| result_s += (next-start); |
| Py_MEMCPY(result_s, to_s, to_len); |
| result_s += to_len; |
| start = next+from_len; |
| } |
| } |
| /* Copy the remainder of the remaining string */ |
| Py_MEMCPY(result_s, start, end-start); |
| |
| return result; |
| } |
| |
| |
| Py_LOCAL(PyBytesObject *) |
| replace(PyBytesObject *self, |
| const char *from_s, Py_ssize_t from_len, |
| const char *to_s, Py_ssize_t to_len, |
| Py_ssize_t maxcount) |
| { |
| if (maxcount < 0) { |
| maxcount = PY_SSIZE_T_MAX; |
| } else if (maxcount == 0 || PyBytes_GET_SIZE(self) == 0) { |
| /* nothing to do; return the original string */ |
| return return_self(self); |
| } |
| |
| if (maxcount == 0 || |
| (from_len == 0 && to_len == 0)) { |
| /* nothing to do; return the original string */ |
| return return_self(self); |
| } |
| |
| /* Handle zero-length special cases */ |
| |
| if (from_len == 0) { |
| /* insert the 'to' string everywhere. */ |
| /* >>> "Python".replace("", ".") */ |
| /* '.P.y.t.h.o.n.' */ |
| return replace_interleave(self, to_s, to_len, maxcount); |
| } |
| |
| /* Except for "".replace("", "A") == "A" there is no way beyond this */ |
| /* point for an empty self string to generate a non-empty string */ |
| /* Special case so the remaining code always gets a non-empty string */ |
| if (PyBytes_GET_SIZE(self) == 0) { |
| return return_self(self); |
| } |
| |
| if (to_len == 0) { |
| /* delete all occurrences of 'from' string */ |
| if (from_len == 1) { |
| return replace_delete_single_character( |
| self, from_s[0], maxcount); |
| } else { |
| return replace_delete_substring(self, from_s, |
| from_len, maxcount); |
| } |
| } |
| |
| /* Handle special case where both strings have the same length */ |
| |
| if (from_len == to_len) { |
| if (from_len == 1) { |
| return replace_single_character_in_place( |
| self, |
| from_s[0], |
| to_s[0], |
| maxcount); |
| } else { |
| return replace_substring_in_place( |
| self, from_s, from_len, to_s, to_len, |
| maxcount); |
| } |
| } |
| |
| /* Otherwise use the more generic algorithms */ |
| if (from_len == 1) { |
| return replace_single_character(self, from_s[0], |
| to_s, to_len, maxcount); |
| } else { |
| /* len('from')>=2, len('to')>=1 */ |
| return replace_substring(self, from_s, from_len, to_s, to_len, |
| maxcount); |
| } |
| } |
| |
| |
| /*[clinic input] |
| bytes.replace |
| |
| old: Py_buffer |
| new: Py_buffer |
| count: Py_ssize_t = -1 |
| Maximum number of occurrences to replace. |
| -1 (the default value) means replace all occurrences. |
| / |
| |
| Return a copy with all occurrences of substring old replaced by new. |
| |
| If the optional argument count is given, only the first count occurrences are |
| replaced. |
| [clinic start generated code]*/ |
| |
| static PyObject * |
| bytes_replace_impl(PyBytesObject*self, Py_buffer *old, Py_buffer *new, |
| Py_ssize_t count) |
| /*[clinic end generated code: output=403dc9d7a83c5a1d input=b2fbbf0bf04de8e5]*/ |
| { |
| return (PyObject *)replace((PyBytesObject *) self, |
| (const char *)old->buf, old->len, |
| (const char *)new->buf, new->len, count); |
| } |
| |
| /** End DALKE **/ |
| |
| /* Matches the end (direction >= 0) or start (direction < 0) of self |
| * against substr, using the start and end arguments. Returns |
| * -1 on error, 0 if not found and 1 if found. |
| */ |
| Py_LOCAL(int) |
| _bytes_tailmatch(PyBytesObject *self, PyObject *substr, Py_ssize_t start, |
| Py_ssize_t end, int direction) |
| { |
| Py_ssize_t len = PyBytes_GET_SIZE(self); |
| Py_ssize_t slen; |
| Py_buffer sub_view = {NULL, NULL}; |
| const char* sub; |
| const char* str; |
| |
| if (PyBytes_Check(substr)) { |
| sub = PyBytes_AS_STRING(substr); |
| slen = PyBytes_GET_SIZE(substr); |
| } |
| else { |
| if (PyObject_GetBuffer(substr, &sub_view, PyBUF_SIMPLE) != 0) |
| return -1; |
| sub = sub_view.buf; |
| slen = sub_view.len; |
| } |
| str = PyBytes_AS_STRING(self); |
| |
| ADJUST_INDICES(start, end, len); |
| |
| if (direction < 0) { |
| /* startswith */ |
| if (start+slen > len) |
| goto notfound; |
| } else { |
| /* endswith */ |
| if (end-start < slen || start > len) |
| goto notfound; |
| |
| if (end-slen > start) |
| start = end - slen; |
| } |
| if (end-start < slen) |
| goto notfound; |
| if (memcmp(str+start, sub, slen) != 0) |
| goto notfound; |
| |
| PyBuffer_Release(&sub_view); |
| return 1; |
| |
| notfound: |
| PyBuffer_Release(&sub_view); |
| return 0; |
| } |
| |
| |
| PyDoc_STRVAR(startswith__doc__, |
| "B.startswith(prefix[, start[, end]]) -> bool\n\ |
| \n\ |
| Return True if B starts with the specified prefix, False otherwise.\n\ |
| With optional start, test B beginning at that position.\n\ |
| With optional end, stop comparing B at that position.\n\ |
| prefix can also be a tuple of bytes to try."); |
| |
| static PyObject * |
| bytes_startswith(PyBytesObject *self, PyObject *args) |
| { |
| Py_ssize_t start = 0; |
| Py_ssize_t end = PY_SSIZE_T_MAX; |
| PyObject *subobj; |
| int result; |
| |
| if (!stringlib_parse_args_finds("startswith", args, &subobj, &start, &end)) |
| return NULL; |
| if (PyTuple_Check(subobj)) { |
| Py_ssize_t i; |
| for (i = 0; i < PyTuple_GET_SIZE(subobj); i++) { |
| result = _bytes_tailmatch(self, |
| PyTuple_GET_ITEM(subobj, i), |
| start, end, -1); |
| if (result == -1) |
| return NULL; |
| else if (result) { |
| Py_RETURN_TRUE; |
| } |
| } |
| Py_RETURN_FALSE; |
| } |
| result = _bytes_tailmatch(self, subobj, start, end, -1); |
| if (result == -1) { |
| if (PyErr_ExceptionMatches(PyExc_TypeError)) |
| PyErr_Format(PyExc_TypeError, "startswith first arg must be bytes " |
| "or a tuple of bytes, not %s", Py_TYPE(subobj)->tp_name); |
| return NULL; |
| } |
| else |
| return PyBool_FromLong(result); |
| } |
| |
| |
| PyDoc_STRVAR(endswith__doc__, |
| "B.endswith(suffix[, start[, end]]) -> bool\n\ |
| \n\ |
| Return True if B ends with the specified suffix, False otherwise.\n\ |
| With optional start, test B beginning at that position.\n\ |
| With optional end, stop comparing B at that position.\n\ |
| suffix can also be a tuple of bytes to try."); |
| |
| static PyObject * |
| bytes_endswith(PyBytesObject *self, PyObject *args) |
| { |
| Py_ssize_t start = 0; |
| Py_ssize_t end = PY_SSIZE_T_MAX; |
| PyObject *subobj; |
| int result; |
| |
| if (!stringlib_parse_args_finds("endswith", args, &subobj, &start, &end)) |
| return NULL; |
| if (PyTuple_Check(subobj)) { |
| Py_ssize_t i; |
| for (i = 0; i < PyTuple_GET_SIZE(subobj); i++) { |
| result = _bytes_tailmatch(self, |
| PyTuple_GET_ITEM(subobj, i), |
| start, end, +1); |
| if (result == -1) |
| return NULL; |
| else if (result) { |
| Py_RETURN_TRUE; |
| } |
| } |
| Py_RETURN_FALSE; |
| } |
| result = _bytes_tailmatch(self, subobj, start, end, +1); |
| if (result == -1) { |
| if (PyErr_ExceptionMatches(PyExc_TypeError)) |
| PyErr_Format(PyExc_TypeError, "endswith first arg must be bytes or " |
| "a tuple of bytes, not %s", Py_TYPE(subobj)->tp_name); |
| return NULL; |
| } |
| else |
| return PyBool_FromLong(result); |
| } |
| |
| |
| /*[clinic input] |
| bytes.decode |
| |
| encoding: str(c_default="NULL") = 'utf-8' |
| The encoding with which to decode the bytes. |
| errors: str(c_default="NULL") = 'strict' |
| The error handling scheme to use for the handling of decoding errors. |
| The default is 'strict' meaning that decoding errors raise a |
| UnicodeDecodeError. Other possible values are 'ignore' and 'replace' |
| as well as any other name registered with codecs.register_error that |
| can handle UnicodeDecodeErrors. |
| |
| Decode the bytes using the codec registered for encoding. |
| [clinic start generated code]*/ |
| |
| static PyObject * |
| bytes_decode_impl(PyBytesObject*self, const char *encoding, |
| const char *errors) |
| /*[clinic end generated code: output=2d2016ff8e0bb176 input=958174769d2a40ca]*/ |
| { |
| return PyUnicode_FromEncodedObject((PyObject*)self, encoding, errors); |
| } |
| |
| |
| /*[clinic input] |
| bytes.splitlines |
| |
| keepends: int(c_default="0") = False |
| |
| Return a list of the lines in the bytes, breaking at line boundaries. |
| |
| Line breaks are not included in the resulting list unless keepends is given and |
| true. |
| [clinic start generated code]*/ |
| |
| static PyObject * |
| bytes_splitlines_impl(PyBytesObject*self, int keepends) |
| /*[clinic end generated code: output=995c3598f7833cad input=7f4aac67144f9944]*/ |
| { |
| return stringlib_splitlines( |
| (PyObject*) self, PyBytes_AS_STRING(self), |
| PyBytes_GET_SIZE(self), keepends |
| ); |
| } |
| |
| /*[clinic input] |
| @classmethod |
| bytes.fromhex |
| |
| string: unicode |
| / |
| |
| Create a bytes object from a string of hexadecimal numbers. |
| |
| Spaces between two numbers are accepted. |
| Example: bytes.fromhex('B9 01EF') -> b'\\xb9\\x01\\xef'. |
| [clinic start generated code]*/ |
| |
| static PyObject * |
| bytes_fromhex_impl(PyTypeObject *type, PyObject *string) |
| /*[clinic end generated code: output=0973acc63661bb2e input=bf4d1c361670acd3]*/ |
| { |
| return _PyBytes_FromHex(string, 0); |
| } |
| |
| PyObject* |
| _PyBytes_FromHex(PyObject *string, int use_bytearray) |
| { |
| char *buf; |
| Py_ssize_t hexlen, invalid_char; |
| unsigned int top, bot; |
| Py_UCS1 *str, *end; |
| _PyBytesWriter writer; |
| |
| _PyBytesWriter_Init(&writer); |
| writer.use_bytearray = use_bytearray; |
| |
| assert(PyUnicode_Check(string)); |
| if (PyUnicode_READY(string)) |
| return NULL; |
| hexlen = PyUnicode_GET_LENGTH(string); |
| |
| if (!PyUnicode_IS_ASCII(string)) { |
| void *data = PyUnicode_DATA(string); |
| unsigned int kind = PyUnicode_KIND(string); |
| Py_ssize_t i; |
| |
| /* search for the first non-ASCII character */ |
| for (i = 0; i < hexlen; i++) { |
| if (PyUnicode_READ(kind, data, i) >= 128) |
| break; |
| } |
| invalid_char = i; |
| goto error; |
| } |
| |
| assert(PyUnicode_KIND(string) == PyUnicode_1BYTE_KIND); |
| str = PyUnicode_1BYTE_DATA(string); |
| |
| /* This overestimates if there are spaces */ |
| buf = _PyBytesWriter_Alloc(&writer, hexlen / 2); |
| if (buf == NULL) |
| return NULL; |
| |
| end = str + hexlen; |
| while (str < end) { |
| /* skip over spaces in the input */ |
| if (*str == ' ') { |
| do { |
| str++; |
| } while (*str == ' '); |
| if (str >= end) |
| break; |
| } |
| |
| top = _PyLong_DigitValue[*str]; |
| if (top >= 16) { |
| invalid_char = str - PyUnicode_1BYTE_DATA(string); |
| goto error; |
| } |
| str++; |
| |
| bot = _PyLong_DigitValue[*str]; |
| if (bot >= 16) { |
| invalid_char = str - PyUnicode_1BYTE_DATA(string); |
| goto error; |
| } |
| str++; |
| |
| *buf++ = (unsigned char)((top << 4) + bot); |
| } |
| |
| return _PyBytesWriter_Finish(&writer, buf); |
| |
| error: |
| PyErr_Format(PyExc_ValueError, |
| "non-hexadecimal number found in " |
| "fromhex() arg at position %zd", invalid_char); |
| _PyBytesWriter_Dealloc(&writer); |
| return NULL; |
| } |
| |
| PyDoc_STRVAR(hex__doc__, |
| "B.hex() -> string\n\ |
| \n\ |
| Create a string of hexadecimal numbers from a bytes object.\n\ |
| Example: b'\\xb9\\x01\\xef'.hex() -> 'b901ef'."); |
| |
| static PyObject * |
| bytes_hex(PyBytesObject *self) |
| { |
| char* argbuf = PyBytes_AS_STRING(self); |
| Py_ssize_t arglen = PyBytes_GET_SIZE(self); |
| return _Py_strhex(argbuf, arglen); |
| } |
| |
| static PyObject * |
| bytes_getnewargs(PyBytesObject *v) |
| { |
| return Py_BuildValue("(y#)", v->ob_sval, Py_SIZE(v)); |
| } |
| |
| |
| static PyMethodDef |
| bytes_methods[] = { |
| {"__getnewargs__", (PyCFunction)bytes_getnewargs, METH_NOARGS}, |
| {"capitalize", (PyCFunction)stringlib_capitalize, METH_NOARGS, |
| _Py_capitalize__doc__}, |
| {"center", (PyCFunction)stringlib_center, METH_VARARGS, center__doc__}, |
| {"count", (PyCFunction)bytes_count, METH_VARARGS, count__doc__}, |
| BYTES_DECODE_METHODDEF |
| {"endswith", (PyCFunction)bytes_endswith, METH_VARARGS, |
| endswith__doc__}, |
| {"expandtabs", (PyCFunction)stringlib_expandtabs, METH_VARARGS | METH_KEYWORDS, |
| expandtabs__doc__}, |
| {"find", (PyCFunction)bytes_find, METH_VARARGS, find__doc__}, |
| BYTES_FROMHEX_METHODDEF |
| {"hex", (PyCFunction)bytes_hex, METH_NOARGS, hex__doc__}, |
| {"index", (PyCFunction)bytes_index, METH_VARARGS, index__doc__}, |
| {"isalnum", (PyCFunction)stringlib_isalnum, METH_NOARGS, |
| _Py_isalnum__doc__}, |
| {"isalpha", (PyCFunction)stringlib_isalpha, METH_NOARGS, |
| _Py_isalpha__doc__}, |
| {"isdigit", (PyCFunction)stringlib_isdigit, METH_NOARGS, |
| _Py_isdigit__doc__}, |
| {"islower", (PyCFunction)stringlib_islower, METH_NOARGS, |
| _Py_islower__doc__}, |
| {"isspace", (PyCFunction)stringlib_isspace, METH_NOARGS, |
| _Py_isspace__doc__}, |
| {"istitle", (PyCFunction)stringlib_istitle, METH_NOARGS, |
| _Py_istitle__doc__}, |
| {"isupper", (PyCFunction)stringlib_isupper, METH_NOARGS, |
| _Py_isupper__doc__}, |
| BYTES_JOIN_METHODDEF |
| {"ljust", (PyCFunction)stringlib_ljust, METH_VARARGS, ljust__doc__}, |
| {"lower", (PyCFunction)stringlib_lower, METH_NOARGS, _Py_lower__doc__}, |
| BYTES_LSTRIP_METHODDEF |
| BYTES_MAKETRANS_METHODDEF |
| BYTES_PARTITION_METHODDEF |
| BYTES_REPLACE_METHODDEF |
| {"rfind", (PyCFunction)bytes_rfind, METH_VARARGS, rfind__doc__}, |
| {"rindex", (PyCFunction)bytes_rindex, METH_VARARGS, rindex__doc__}, |
| {"rjust", (PyCFunction)stringlib_rjust, METH_VARARGS, rjust__doc__}, |
| BYTES_RPARTITION_METHODDEF |
| BYTES_RSPLIT_METHODDEF |
| BYTES_RSTRIP_METHODDEF |
| BYTES_SPLIT_METHODDEF |
| BYTES_SPLITLINES_METHODDEF |
| {"startswith", (PyCFunction)bytes_startswith, METH_VARARGS, |
| startswith__doc__}, |
| BYTES_STRIP_METHODDEF |
| {"swapcase", (PyCFunction)stringlib_swapcase, METH_NOARGS, |
| _Py_swapcase__doc__}, |
| {"title", (PyCFunction)stringlib_title, METH_NOARGS, _Py_title__doc__}, |
| BYTES_TRANSLATE_METHODDEF |
| {"upper", (PyCFunction)stringlib_upper, METH_NOARGS, _Py_upper__doc__}, |
| {"zfill", (PyCFunction)stringlib_zfill, METH_VARARGS, zfill__doc__}, |
| {NULL, NULL} /* sentinel */ |
| }; |
| |
| static PyObject * |
| bytes_mod(PyObject *self, PyObject *args) |
| { |
| if (self == NULL || !PyBytes_Check(self)) { |
| PyErr_BadInternalCall(); |
| return NULL; |
| } |
| |
| return _PyBytes_FormatEx(PyBytes_AS_STRING(self), PyBytes_GET_SIZE(self), |
| args, 0); |
| } |
| |
| static PyNumberMethods bytes_as_number = { |
| 0, /*nb_add*/ |
| 0, /*nb_subtract*/ |
| 0, /*nb_multiply*/ |
| bytes_mod, /*nb_remainder*/ |
| }; |
| |
| static PyObject * |
| bytes_subtype_new(PyTypeObject *type, PyObject *args, PyObject *kwds); |
| |
| static PyObject * |
| bytes_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| { |
| PyObject *x = NULL; |
| const char *encoding = NULL; |
| const char *errors = NULL; |
| PyObject *new = NULL; |
| PyObject *func; |
| Py_ssize_t size; |
| static char *kwlist[] = {"source", "encoding", "errors", 0}; |
| _Py_IDENTIFIER(__bytes__); |
| |
| if (type != &PyBytes_Type) |
| return bytes_subtype_new(type, args, kwds); |
| if (!PyArg_ParseTupleAndKeywords(args, kwds, "|Oss:bytes", kwlist, &x, |
| &encoding, &errors)) |
| return NULL; |
| if (x == NULL) { |
| if (encoding != NULL || errors != NULL) { |
| PyErr_SetString(PyExc_TypeError, |
| "encoding or errors without sequence " |
| "argument"); |
| return NULL; |
| } |
| return PyBytes_FromStringAndSize(NULL, 0); |
| } |
| |
| if (encoding != NULL) { |
| /* Encode via the codec registry */ |
| if (!PyUnicode_Check(x)) { |
| PyErr_SetString(PyExc_TypeError, |
| "encoding without a string argument"); |
| return NULL; |
| } |
| new = PyUnicode_AsEncodedString(x, encoding, errors); |
| if (new == NULL) |
| return NULL; |
| assert(PyBytes_Check(new)); |
| return new; |
| } |
| |
| if (errors != NULL) { |
| PyErr_SetString(PyExc_TypeError, |
| PyUnicode_Check(x) ? |
| "string argument without an encoding" : |
| "errors without a string argument"); |
| return NULL; |
| } |
| |
| /* We'd like to call PyObject_Bytes here, but we need to check for an |
| integer argument before deferring to PyBytes_FromObject, something |
| PyObject_Bytes doesn't do. */ |
| func = _PyObject_LookupSpecial(x, &PyId___bytes__); |
| if (func != NULL) { |
| new = PyObject_CallFunctionObjArgs(func, NULL); |
| Py_DECREF(func); |
| if (new == NULL) |
| return NULL; |
| if (!PyBytes_Check(new)) { |
| PyErr_Format(PyExc_TypeError, |
| "__bytes__ returned non-bytes (type %.200s)", |
| Py_TYPE(new)->tp_name); |
| Py_DECREF(new); |
| return NULL; |
| } |
| return new; |
| } |
| else if (PyErr_Occurred()) |
| return NULL; |
| |
| if (PyUnicode_Check(x)) { |
| PyErr_SetString(PyExc_TypeError, |
| "string argument without an encoding"); |
| return NULL; |
| } |
| /* Is it an integer? */ |
| size = PyNumber_AsSsize_t(x, PyExc_OverflowError); |
| if (size == -1 && PyErr_Occurred()) { |
| if (PyErr_ExceptionMatches(PyExc_OverflowError)) |
| return NULL; |
| PyErr_Clear(); |
| } |
| else if (size < 0) { |
| PyErr_SetString(PyExc_ValueError, "negative count"); |
| return NULL; |
| } |
| else { |
| new = _PyBytes_FromSize(size, 1); |
| if (new == NULL) |
| return NULL; |
| return new; |
| } |
| |
| return PyBytes_FromObject(x); |
| } |
| |
| static PyObject* |
| _PyBytes_FromBuffer(PyObject *x) |
| { |
| PyObject *new; |
| Py_buffer view; |
| |
| if (PyObject_GetBuffer(x, &view, PyBUF_FULL_RO) < 0) |
| return NULL; |
| |
| new = PyBytes_FromStringAndSize(NULL, view.len); |
| if (!new) |
| goto fail; |
| if (PyBuffer_ToContiguous(((PyBytesObject *)new)->ob_sval, |
| &view, view.len, 'C') < 0) |
| goto fail; |
| PyBuffer_Release(&view); |
| return new; |
| |
| fail: |
| Py_XDECREF(new); |
| PyBuffer_Release(&view); |
| return NULL; |
| } |
| |
| #define _PyBytes_FROM_LIST_BODY(x, GET_ITEM) \ |
| do { \ |
| PyObject *bytes; \ |
| Py_ssize_t i; \ |
| Py_ssize_t value; \ |
| char *str; \ |
| PyObject *item; \ |
| \ |
| bytes = PyBytes_FromStringAndSize(NULL, Py_SIZE(x)); \ |
| if (bytes == NULL) \ |
| return NULL; \ |
| str = ((PyBytesObject *)bytes)->ob_sval; \ |
| \ |
| for (i = 0; i < Py_SIZE(x); i++) { \ |
| item = GET_ITEM((x), i); \ |
| value = PyNumber_AsSsize_t(item, PyExc_ValueError); \ |
| if (value == -1 && PyErr_Occurred()) \ |
| goto error; \ |
| \ |
| if (value < 0 || value >= 256) { \ |
| PyErr_SetString(PyExc_ValueError, \ |
| "bytes must be in range(0, 256)"); \ |
| goto error; \ |
| } \ |
| *str++ = (char) value; \ |
| } \ |
| return bytes; \ |
| \ |
| error: \ |
| Py_DECREF(bytes); \ |
| return NULL; \ |
| } while (0) |
| |
| static PyObject* |
| _PyBytes_FromList(PyObject *x) |
| { |
| _PyBytes_FROM_LIST_BODY(x, PyList_GET_ITEM); |
| } |
| |
| static PyObject* |
| _PyBytes_FromTuple(PyObject *x) |
| { |
| _PyBytes_FROM_LIST_BODY(x, PyTuple_GET_ITEM); |
| } |
| |
| static PyObject * |
| _PyBytes_FromIterator(PyObject *x) |
| { |
| char *str; |
| PyObject *it; |
| Py_ssize_t i, size; |
| _PyBytesWriter writer; |
| |
| _PyBytesWriter_Init(&writer); |
| |
| /* For iterator version, create a string object and resize as needed */ |
| size = PyObject_LengthHint(x, 64); |
| if (size == -1 && PyErr_Occurred()) |
| return NULL; |
| |
| str = _PyBytesWriter_Alloc(&writer, size); |
| if (str == NULL) |
| return NULL; |
| writer.overallocate = 1; |
| size = writer.allocated; |
| |
| /* Get the iterator */ |
| it = PyObject_GetIter(x); |
| if (it == NULL) |
| goto error; |
| |
| /* Run the iterator to exhaustion */ |
| for (i = 0; ; i++) { |
| PyObject *item; |
| Py_ssize_t value; |
| |
| /* Get the next item */ |
| item = PyIter_Next(it); |
| if (item == NULL) { |
| if (PyErr_Occurred()) |
| goto error; |
| break; |
| } |
| |
| /* Interpret it as an int (__index__) */ |
| value = PyNumber_AsSsize_t(item, PyExc_ValueError); |
| Py_DECREF(item); |
| if (value == -1 && PyErr_Occurred()) |
| goto error; |
| |
| /* Range check */ |
| if (value < 0 || value >= 256) { |
| PyErr_SetString(PyExc_ValueError, |
| "bytes must be in range(0, 256)"); |
| goto error; |
| } |
| |
| /* Append the byte */ |
| if (i >= size) { |
| str = _PyBytesWriter_Resize(&writer, str, size+1); |
| if (str == NULL) |
| return NULL; |
| size = writer.allocated; |
| } |
| *str++ = (char) value; |
| } |
| Py_DECREF(it); |
| |
| return _PyBytesWriter_Finish(&writer, str); |
| |
| error: |
| _PyBytesWriter_Dealloc(&writer); |
| Py_XDECREF(it); |
| return NULL; |
| } |
| |
| PyObject * |
| PyBytes_FromObject(PyObject *x) |
| { |
| if (x == NULL) { |
| PyErr_BadInternalCall(); |
| return NULL; |
| } |
| |
| if (PyBytes_CheckExact(x)) { |
| Py_INCREF(x); |
| return x; |
| } |
| |
| /* Use the modern buffer interface */ |
| if (PyObject_CheckBuffer(x)) |
| return _PyBytes_FromBuffer(x); |
| |
| if (PyList_CheckExact(x)) |
| return _PyBytes_FromList(x); |
| |
| if (PyTuple_CheckExact(x)) |
| return _PyBytes_FromTuple(x); |
| |
| if (PyUnicode_Check(x)) { |
| PyErr_SetString(PyExc_TypeError, |
| "cannot convert unicode object to bytes"); |
| return NULL; |
| } |
| |
| return _PyBytes_FromIterator(x); |
| } |
| |
| static PyObject * |
| bytes_subtype_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| { |
| PyObject *tmp, *pnew; |
| Py_ssize_t n; |
| |
| assert(PyType_IsSubtype(type, &PyBytes_Type)); |
| tmp = bytes_new(&PyBytes_Type, args, kwds); |
| if (tmp == NULL) |
| return NULL; |
| assert(PyBytes_Check(tmp)); |
| n = PyBytes_GET_SIZE(tmp); |
| pnew = type->tp_alloc(type, n); |
| if (pnew != NULL) { |
| Py_MEMCPY(PyBytes_AS_STRING(pnew), |
| PyBytes_AS_STRING(tmp), n+1); |
| ((PyBytesObject *)pnew)->ob_shash = |
| ((PyBytesObject *)tmp)->ob_shash; |
| } |
| Py_DECREF(tmp); |
| return pnew; |
| } |
| |
| PyDoc_STRVAR(bytes_doc, |
| "bytes(iterable_of_ints) -> bytes\n\ |
| bytes(string, encoding[, errors]) -> bytes\n\ |
| bytes(bytes_or_buffer) -> immutable copy of bytes_or_buffer\n\ |
| bytes(int) -> bytes object of size given by the parameter initialized with null bytes\n\ |
| bytes() -> empty bytes object\n\ |
| \n\ |
| Construct an immutable array of bytes from:\n\ |
| - an iterable yielding integers in range(256)\n\ |
| - a text string encoded using the specified encoding\n\ |
| - any object implementing the buffer API.\n\ |
| - an integer"); |
| |
| static PyObject *bytes_iter(PyObject *seq); |
| |
| PyTypeObject PyBytes_Type = { |
| PyVarObject_HEAD_INIT(&PyType_Type, 0) |
| "bytes", |
| PyBytesObject_SIZE, |
| sizeof(char), |
| bytes_dealloc, /* tp_dealloc */ |
| 0, /* tp_print */ |
| 0, /* tp_getattr */ |
| 0, /* tp_setattr */ |
| 0, /* tp_reserved */ |
| (reprfunc)bytes_repr, /* tp_repr */ |
| &bytes_as_number, /* tp_as_number */ |
| &bytes_as_sequence, /* tp_as_sequence */ |
| &bytes_as_mapping, /* tp_as_mapping */ |
| (hashfunc)bytes_hash, /* tp_hash */ |
| 0, /* tp_call */ |
| bytes_str, /* tp_str */ |
| PyObject_GenericGetAttr, /* tp_getattro */ |
| 0, /* tp_setattro */ |
| &bytes_as_buffer, /* tp_as_buffer */ |
| Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | |
| Py_TPFLAGS_BYTES_SUBCLASS, /* tp_flags */ |
| bytes_doc, /* tp_doc */ |
| 0, /* tp_traverse */ |
| 0, /* tp_clear */ |
| (richcmpfunc)bytes_richcompare, /* tp_richcompare */ |
| 0, /* tp_weaklistoffset */ |
| bytes_iter, /* tp_iter */ |
| 0, /* tp_iternext */ |
| bytes_methods, /* tp_methods */ |
| 0, /* tp_members */ |
| 0, /* tp_getset */ |
| &PyBaseObject_Type, /* tp_base */ |
| 0, /* tp_dict */ |
| 0, /* tp_descr_get */ |
| 0, /* tp_descr_set */ |
| 0, /* tp_dictoffset */ |
| 0, /* tp_init */ |
| 0, /* tp_alloc */ |
| bytes_new, /* tp_new */ |
| PyObject_Del, /* tp_free */ |
| }; |
| |
| void |
| PyBytes_Concat(PyObject **pv, PyObject *w) |
| { |
| assert(pv != NULL); |
| if (*pv == NULL) |
| return; |
| if (w == NULL) { |
| Py_CLEAR(*pv); |
| return; |
| } |
| |
| if (Py_REFCNT(*pv) == 1 && PyBytes_CheckExact(*pv)) { |
| /* Only one reference, so we can resize in place */ |
| Py_ssize_t oldsize; |
| Py_buffer wb; |
| |
| wb.len = -1; |
| if (PyObject_GetBuffer(w, &wb, PyBUF_SIMPLE) != 0) { |
| PyErr_Format(PyExc_TypeError, "can't concat %.100s to %.100s", |
| Py_TYPE(w)->tp_name, Py_TYPE(*pv)->tp_name); |
| Py_CLEAR(*pv); |
| return; |
| } |
| |
| oldsize = PyBytes_GET_SIZE(*pv); |
| if (oldsize > PY_SSIZE_T_MAX - wb.len) { |
| PyErr_NoMemory(); |
| goto error; |
| } |
| if (_PyBytes_Resize(pv, oldsize + wb.len) < 0) |
| goto error; |
| |
| memcpy(PyBytes_AS_STRING(*pv) + oldsize, wb.buf, wb.len); |
| PyBuffer_Release(&wb); |
| return; |
| |
| error: |
| PyBuffer_Release(&wb); |
| Py_CLEAR(*pv); |
| return; |
| } |
| |
| else { |
| /* Multiple references, need to create new object */ |
| PyObject *v; |
| v = bytes_concat(*pv, w); |
| Py_SETREF(*pv, v); |
| } |
| } |
| |
| void |
| PyBytes_ConcatAndDel(PyObject **pv, PyObject *w) |
| { |
| PyBytes_Concat(pv, w); |
| Py_XDECREF(w); |
| } |
| |
| |
| /* The following function breaks the notion that bytes are immutable: |
| it changes the size of a bytes object. We get away with this only if there |
| is only one module referencing the object. You can also think of it |
| as creating a new bytes object and destroying the old one, only |
| more efficiently. In any case, don't use this if the bytes object may |
| already be known to some other part of the code... |
| Note that if there's not enough memory to resize the bytes object, the |
| original bytes object at *pv is deallocated, *pv is set to NULL, an "out of |
| memory" exception is set, and -1 is returned. Else (on success) 0 is |
| returned, and the value in *pv may or may not be the same as on input. |
| As always, an extra byte is allocated for a trailing \0 byte (newsize |
| does *not* include that), and a trailing \0 byte is stored. |
| */ |
| |
| int |
| _PyBytes_Resize(PyObject **pv, Py_ssize_t newsize) |
| { |
| PyObject *v; |
| PyBytesObject *sv; |
| v = *pv; |
| if (!PyBytes_Check(v) || Py_REFCNT(v) != 1 || newsize < 0) { |
| *pv = 0; |
| Py_DECREF(v); |
| PyErr_BadInternalCall(); |
| return -1; |
| } |
| /* XXX UNREF/NEWREF interface should be more symmetrical */ |
| _Py_DEC_REFTOTAL; |
| _Py_ForgetReference(v); |
| *pv = (PyObject *) |
| PyObject_REALLOC(v, PyBytesObject_SIZE + newsize); |
| if (*pv == NULL) { |
| PyObject_Del(v); |
| PyErr_NoMemory(); |
| return -1; |
| } |
| _Py_NewReference(*pv); |
| sv = (PyBytesObject *) *pv; |
| Py_SIZE(sv) = newsize; |
| sv->ob_sval[newsize] = '\0'; |
| sv->ob_shash = -1; /* invalidate cached hash value */ |
| return 0; |
| } |
| |
| void |
| PyBytes_Fini(void) |
| { |
| int i; |
| for (i = 0; i < UCHAR_MAX + 1; i++) |
| Py_CLEAR(characters[i]); |
| Py_CLEAR(nullstring); |
| } |
| |
| /*********************** Bytes Iterator ****************************/ |
| |
| typedef struct { |
| PyObject_HEAD |
| Py_ssize_t it_index; |
| PyBytesObject *it_seq; /* Set to NULL when iterator is exhausted */ |
| } striterobject; |
| |
| static void |
| striter_dealloc(striterobject *it) |
| { |
| _PyObject_GC_UNTRACK(it); |
| Py_XDECREF(it->it_seq); |
| PyObject_GC_Del(it); |
| } |
| |
| static int |
| striter_traverse(striterobject *it, visitproc visit, void *arg) |
| { |
| Py_VISIT(it->it_seq); |
| return 0; |
| } |
| |
| static PyObject * |
| striter_next(striterobject *it) |
| { |
| PyBytesObject *seq; |
| PyObject *item; |
| |
| assert(it != NULL); |
| seq = it->it_seq; |
| if (seq == NULL) |
| return NULL; |
| assert(PyBytes_Check(seq)); |
| |
| if (it->it_index < PyBytes_GET_SIZE(seq)) { |
| item = PyLong_FromLong( |
| (unsigned char)seq->ob_sval[it->it_index]); |
| if (item != NULL) |
| ++it->it_index; |
| return item; |
| } |
| |
| Py_DECREF(seq); |
| it->it_seq = NULL; |
| return NULL; |
| } |
| |
| static PyObject * |
| striter_len(striterobject *it) |
| { |
| Py_ssize_t len = 0; |
| if (it->it_seq) |
| len = PyBytes_GET_SIZE(it->it_seq) - it->it_index; |
| return PyLong_FromSsize_t(len); |
| } |
| |
| PyDoc_STRVAR(length_hint_doc, |
| "Private method returning an estimate of len(list(it))."); |
| |
| static PyObject * |
| striter_reduce(striterobject *it) |
| { |
| if (it->it_seq != NULL) { |
| return Py_BuildValue("N(O)n", _PyObject_GetBuiltin("iter"), |
| it->it_seq, it->it_index); |
| } else { |
| PyObject *u = PyUnicode_FromUnicode(NULL, 0); |
| if (u == NULL) |
| return NULL; |
| return Py_BuildValue("N(N)", _PyObject_GetBuiltin("iter"), u); |
| } |
| } |
| |
| PyDoc_STRVAR(reduce_doc, "Return state information for pickling."); |
| |
| static PyObject * |
| striter_setstate(striterobject *it, PyObject *state) |
| { |
| Py_ssize_t index = PyLong_AsSsize_t(state); |
| if (index == -1 && PyErr_Occurred()) |
| return NULL; |
| if (it->it_seq != NULL) { |
| if (index < 0) |
| index = 0; |
| else if (index > PyBytes_GET_SIZE(it->it_seq)) |
| index = PyBytes_GET_SIZE(it->it_seq); /* iterator exhausted */ |
| it->it_index = index; |
| } |
| Py_RETURN_NONE; |
| } |
| |
| PyDoc_STRVAR(setstate_doc, "Set state information for unpickling."); |
| |
| static PyMethodDef striter_methods[] = { |
| {"__length_hint__", (PyCFunction)striter_len, METH_NOARGS, |
| length_hint_doc}, |
| {"__reduce__", (PyCFunction)striter_reduce, METH_NOARGS, |
| reduce_doc}, |
| {"__setstate__", (PyCFunction)striter_setstate, METH_O, |
| setstate_doc}, |
| {NULL, NULL} /* sentinel */ |
| }; |
| |
| PyTypeObject PyBytesIter_Type = { |
| PyVarObject_HEAD_INIT(&PyType_Type, 0) |
| "bytes_iterator", /* tp_name */ |
| sizeof(striterobject), /* tp_basicsize */ |
| 0, /* tp_itemsize */ |
| /* methods */ |
| (destructor)striter_dealloc, /* tp_dealloc */ |
| 0, /* tp_print */ |
| 0, /* tp_getattr */ |
| 0, /* tp_setattr */ |
| 0, /* tp_reserved */ |
| 0, /* tp_repr */ |
| 0, /* tp_as_number */ |
| 0, /* tp_as_sequence */ |
| 0, /* tp_as_mapping */ |
| 0, /* tp_hash */ |
| 0, /* tp_call */ |
| 0, /* tp_str */ |
| PyObject_GenericGetAttr, /* tp_getattro */ |
| 0, /* tp_setattro */ |
| 0, /* tp_as_buffer */ |
| Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC,/* tp_flags */ |
| 0, /* tp_doc */ |
| (traverseproc)striter_traverse, /* tp_traverse */ |
| 0, /* tp_clear */ |
| 0, /* tp_richcompare */ |
| 0, /* tp_weaklistoffset */ |
| PyObject_SelfIter, /* tp_iter */ |
| (iternextfunc)striter_next, /* tp_iternext */ |
| striter_methods, /* tp_methods */ |
| 0, |
| }; |
| |
| static PyObject * |
| bytes_iter(PyObject *seq) |
| { |
| striterobject *it; |
| |
| if (!PyBytes_Check(seq)) { |
| PyErr_BadInternalCall(); |
| return NULL; |
| } |
| it = PyObject_GC_New(striterobject, &PyBytesIter_Type); |
| if (it == NULL) |
| return NULL; |
| it->it_index = 0; |
| Py_INCREF(seq); |
| it->it_seq = (PyBytesObject *)seq; |
| _PyObject_GC_TRACK(it); |
| return (PyObject *)it; |
| } |
| |
| |
| /* _PyBytesWriter API */ |
| |
| #ifdef MS_WINDOWS |
| /* On Windows, overallocate by 50% is the best factor */ |
| # define OVERALLOCATE_FACTOR 2 |
| #else |
| /* On Linux, overallocate by 25% is the best factor */ |
| # define OVERALLOCATE_FACTOR 4 |
| #endif |
| |
| void |
| _PyBytesWriter_Init(_PyBytesWriter *writer) |
| { |
| /* Set all attributes before small_buffer to 0 */ |
| memset(writer, 0, offsetof(_PyBytesWriter, small_buffer)); |
| #ifdef Py_DEBUG |
| memset(writer->small_buffer, 0xCB, sizeof(writer->small_buffer)); |
| #endif |
| } |
| |
| void |
| _PyBytesWriter_Dealloc(_PyBytesWriter *writer) |
| { |
| Py_CLEAR(writer->buffer); |
| } |
| |
| Py_LOCAL_INLINE(char*) |
| _PyBytesWriter_AsString(_PyBytesWriter *writer) |
| { |
| if (writer->use_small_buffer) { |
| assert(writer->buffer == NULL); |
| return writer->small_buffer; |
| } |
| else if (writer->use_bytearray) { |
| assert(writer->buffer != NULL); |
| return PyByteArray_AS_STRING(writer->buffer); |
| } |
| else { |
| assert(writer->buffer != NULL); |
| return PyBytes_AS_STRING(writer->buffer); |
| } |
| } |
| |
| Py_LOCAL_INLINE(Py_ssize_t) |
| _PyBytesWriter_GetSize(_PyBytesWriter *writer, char *str) |
| { |
| char *start = _PyBytesWriter_AsString(writer); |
| assert(str != NULL); |
| assert(str >= start); |
| assert(str - start <= writer->allocated); |
| return str - start; |
| } |
| |
| Py_LOCAL_INLINE(void) |
| _PyBytesWriter_CheckConsistency(_PyBytesWriter *writer, char *str) |
| { |
| #ifdef Py_DEBUG |
| char *start, *end; |
| |
| if (writer->use_small_buffer) { |
| assert(writer->buffer == NULL); |
| } |
| else { |
| assert(writer->buffer != NULL); |
| if (writer->use_bytearray) |
| assert(PyByteArray_CheckExact(writer->buffer)); |
| else |
| assert(PyBytes_CheckExact(writer->buffer)); |
| assert(Py_REFCNT(writer->buffer) == 1); |
| } |
| |
| if (writer->use_bytearray) { |
| /* bytearray has its own overallocation algorithm, |
| writer overallocation must be disabled */ |
| assert(!writer->overallocate); |
| } |
| |
| assert(0 <= writer->allocated); |
| assert(0 <= writer->min_size && writer->min_size <= writer->allocated); |
| /* the last byte must always be null */ |
| start = _PyBytesWriter_AsString(writer); |
| assert(start[writer->allocated] == 0); |
| |
| end = start + writer->allocated; |
| assert(str != NULL); |
| assert(start <= str && str <= end); |
| #endif |
| } |
| |
| void* |
| _PyBytesWriter_Resize(_PyBytesWriter *writer, void *str, Py_ssize_t size) |
| { |
| Py_ssize_t allocated, pos; |
| |
| _PyBytesWriter_CheckConsistency(writer, str); |
| assert(writer->allocated < size); |
| |
| allocated = size; |
| if (writer->overallocate |
| && allocated <= (PY_SSIZE_T_MAX - allocated / OVERALLOCATE_FACTOR)) { |
| /* overallocate to limit the number of realloc() */ |
| allocated += allocated / OVERALLOCATE_FACTOR; |
| } |
| |
| pos = _PyBytesWriter_GetSize(writer, str); |
| if (!writer->use_small_buffer) { |
| if (writer->use_bytearray) { |
| if (PyByteArray_Resize(writer->buffer, allocated)) |
| goto error; |
| /* writer->allocated can be smaller than writer->buffer->ob_alloc, |
| but we cannot use ob_alloc because bytes may need to be moved |
| to use the whole buffer. bytearray uses an internal optimization |
| to avoid moving or copying bytes when bytes are removed at the |
| beginning (ex: del bytearray[:1]). */ |
| } |
| else { |
| if (_PyBytes_Resize(&writer->buffer, allocated)) |
| goto error; |
| } |
| } |
| else { |
| /* convert from stack buffer to bytes object buffer */ |
| assert(writer->buffer == NULL); |
| |
| if (writer->use_bytearray) |
| writer->buffer = PyByteArray_FromStringAndSize(NULL, allocated); |
| else |
| writer->buffer = PyBytes_FromStringAndSize(NULL, allocated); |
| if (writer->buffer == NULL) |
| goto error; |
| |
| if (pos != 0) { |
| char *dest; |
| if (writer->use_bytearray) |
| dest = PyByteArray_AS_STRING(writer->buffer); |
| else |
| dest = PyBytes_AS_STRING(writer->buffer); |
| Py_MEMCPY(dest, |
| writer->small_buffer, |
| pos); |
| } |
| |
| writer->use_small_buffer = 0; |
| #ifdef Py_DEBUG |
| memset(writer->small_buffer, 0xDB, sizeof(writer->small_buffer)); |
| #endif |
| } |
| writer->allocated = allocated; |
| |
| str = _PyBytesWriter_AsString(writer) + pos; |
| _PyBytesWriter_CheckConsistency(writer, str); |
| return str; |
| |
| error: |
| _PyBytesWriter_Dealloc(writer); |
| return NULL; |
| } |
| |
| void* |
| _PyBytesWriter_Prepare(_PyBytesWriter *writer, void *str, Py_ssize_t size) |
| { |
| Py_ssize_t new_min_size; |
| |
| _PyBytesWriter_CheckConsistency(writer, str); |
| assert(size >= 0); |
| |
| if (size == 0) { |
| /* nothing to do */ |
| return str; |
| } |
| |
| if (writer->min_size > PY_SSIZE_T_MAX - size) { |
| PyErr_NoMemory(); |
| _PyBytesWriter_Dealloc(writer); |
| return NULL; |
| } |
| new_min_size = writer->min_size + size; |
| |
| if (new_min_size > writer->allocated) |
| str = _PyBytesWriter_Resize(writer, str, new_min_size); |
| |
| writer->min_size = new_min_size; |
| return str; |
| } |
| |
| /* Allocate the buffer to write size bytes. |
| Return the pointer to the beginning of buffer data. |
| Raise an exception and return NULL on error. */ |
| void* |
| _PyBytesWriter_Alloc(_PyBytesWriter *writer, Py_ssize_t size) |
| { |
| /* ensure that _PyBytesWriter_Alloc() is only called once */ |
| assert(writer->min_size == 0 && writer->buffer == NULL); |
| assert(size >= 0); |
| |
| writer->use_small_buffer = 1; |
| #ifdef Py_DEBUG |
| writer->allocated = sizeof(writer->small_buffer) - 1; |
| /* In debug mode, don't use the full small buffer because it is less |
| efficient than bytes and bytearray objects to detect buffer underflow |
| and buffer overflow. Use 10 bytes of the small buffer to test also |
| code using the smaller buffer in debug mode. |
| |
| Don't modify the _PyBytesWriter structure (use a shorter small buffer) |
| in debug mode to also be able to detect stack overflow when running |
| tests in debug mode. The _PyBytesWriter is large (more than 512 bytes), |
| if Py_EnterRecursiveCall() is not used in deep C callback, we may hit a |
| stack overflow. */ |
| writer->allocated = Py_MIN(writer->allocated, 10); |
| /* _PyBytesWriter_CheckConsistency() requires the last byte to be 0, |
| to detect buffer overflow */ |
| writer->small_buffer[writer->allocated] = 0; |
| #else |
| writer->allocated = sizeof(writer->small_buffer); |
| #endif |
| return _PyBytesWriter_Prepare(writer, writer->small_buffer, size); |
| } |
| |
| PyObject * |
| _PyBytesWriter_Finish(_PyBytesWriter *writer, void *str) |
| { |
| Py_ssize_t size; |
| PyObject *result; |
| |
| _PyBytesWriter_CheckConsistency(writer, str); |
| |
| size = _PyBytesWriter_GetSize(writer, str); |
| if (size == 0 && !writer->use_bytearray) { |
| Py_CLEAR(writer->buffer); |
| /* Get the empty byte string singleton */ |
| result = PyBytes_FromStringAndSize(NULL, 0); |
| } |
| else if (writer->use_small_buffer) { |
| result = PyBytes_FromStringAndSize(writer->small_buffer, size); |
| } |
| else { |
| result = writer->buffer; |
| writer->buffer = NULL; |
| |
| if (size != writer->allocated) { |
| if (writer->use_bytearray) { |
| if (PyByteArray_Resize(result, size)) { |
| Py_DECREF(result); |
| return NULL; |
| } |
| } |
| else { |
| if (_PyBytes_Resize(&result, size)) { |
| assert(result == NULL); |
| return NULL; |
| } |
| } |
| } |
| } |
| return result; |
| } |
| |
| void* |
| _PyBytesWriter_WriteBytes(_PyBytesWriter *writer, void *ptr, |
| const void *bytes, Py_ssize_t size) |
| { |
| char *str = (char *)ptr; |
| |
| str = _PyBytesWriter_Prepare(writer, str, size); |
| if (str == NULL) |
| return NULL; |
| |
| Py_MEMCPY(str, bytes, size); |
| str += size; |
| |
| return str; |
| } |