mirror of https://github.com/python/cpython
814 lines
21 KiB
C
814 lines
21 KiB
C
#include "Python.h"
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#include "bytes_methods.h"
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PyDoc_STRVAR_shared(_Py_isspace__doc__,
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"B.isspace() -> bool\n\
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\n\
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Return True if all characters in B are whitespace\n\
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and there is at least one character in B, False otherwise.");
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PyObject*
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_Py_bytes_isspace(const char *cptr, Py_ssize_t len)
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{
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const unsigned char *p
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= (unsigned char *) cptr;
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const unsigned char *e;
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/* Shortcut for single character strings */
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if (len == 1 && Py_ISSPACE(*p))
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Py_RETURN_TRUE;
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/* Special case for empty strings */
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if (len == 0)
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Py_RETURN_FALSE;
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e = p + len;
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for (; p < e; p++) {
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if (!Py_ISSPACE(*p))
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Py_RETURN_FALSE;
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}
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Py_RETURN_TRUE;
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}
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PyDoc_STRVAR_shared(_Py_isalpha__doc__,
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"B.isalpha() -> bool\n\
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\n\
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Return True if all characters in B are alphabetic\n\
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and there is at least one character in B, False otherwise.");
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PyObject*
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_Py_bytes_isalpha(const char *cptr, Py_ssize_t len)
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{
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const unsigned char *p
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= (unsigned char *) cptr;
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const unsigned char *e;
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/* Shortcut for single character strings */
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if (len == 1 && Py_ISALPHA(*p))
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Py_RETURN_TRUE;
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/* Special case for empty strings */
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if (len == 0)
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Py_RETURN_FALSE;
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e = p + len;
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for (; p < e; p++) {
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if (!Py_ISALPHA(*p))
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Py_RETURN_FALSE;
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}
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Py_RETURN_TRUE;
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}
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PyDoc_STRVAR_shared(_Py_isalnum__doc__,
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"B.isalnum() -> bool\n\
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\n\
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Return True if all characters in B are alphanumeric\n\
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and there is at least one character in B, False otherwise.");
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PyObject*
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_Py_bytes_isalnum(const char *cptr, Py_ssize_t len)
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{
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const unsigned char *p
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= (unsigned char *) cptr;
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const unsigned char *e;
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/* Shortcut for single character strings */
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if (len == 1 && Py_ISALNUM(*p))
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Py_RETURN_TRUE;
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/* Special case for empty strings */
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if (len == 0)
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Py_RETURN_FALSE;
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e = p + len;
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for (; p < e; p++) {
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if (!Py_ISALNUM(*p))
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Py_RETURN_FALSE;
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}
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Py_RETURN_TRUE;
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}
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PyDoc_STRVAR_shared(_Py_isdigit__doc__,
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"B.isdigit() -> bool\n\
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\n\
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Return True if all characters in B are digits\n\
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and there is at least one character in B, False otherwise.");
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PyObject*
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_Py_bytes_isdigit(const char *cptr, Py_ssize_t len)
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{
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const unsigned char *p
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= (unsigned char *) cptr;
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const unsigned char *e;
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/* Shortcut for single character strings */
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if (len == 1 && Py_ISDIGIT(*p))
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Py_RETURN_TRUE;
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/* Special case for empty strings */
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if (len == 0)
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Py_RETURN_FALSE;
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e = p + len;
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for (; p < e; p++) {
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if (!Py_ISDIGIT(*p))
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Py_RETURN_FALSE;
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}
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Py_RETURN_TRUE;
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}
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PyDoc_STRVAR_shared(_Py_islower__doc__,
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"B.islower() -> bool\n\
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\n\
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Return True if all cased characters in B are lowercase and there is\n\
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at least one cased character in B, False otherwise.");
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PyObject*
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_Py_bytes_islower(const char *cptr, Py_ssize_t len)
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{
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const unsigned char *p
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= (unsigned char *) cptr;
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const unsigned char *e;
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int cased;
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/* Shortcut for single character strings */
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if (len == 1)
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return PyBool_FromLong(Py_ISLOWER(*p));
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/* Special case for empty strings */
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if (len == 0)
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Py_RETURN_FALSE;
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e = p + len;
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cased = 0;
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for (; p < e; p++) {
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if (Py_ISUPPER(*p))
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Py_RETURN_FALSE;
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else if (!cased && Py_ISLOWER(*p))
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cased = 1;
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}
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return PyBool_FromLong(cased);
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}
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PyDoc_STRVAR_shared(_Py_isupper__doc__,
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"B.isupper() -> bool\n\
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\n\
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Return True if all cased characters in B are uppercase and there is\n\
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at least one cased character in B, False otherwise.");
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PyObject*
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_Py_bytes_isupper(const char *cptr, Py_ssize_t len)
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{
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const unsigned char *p
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= (unsigned char *) cptr;
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const unsigned char *e;
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int cased;
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/* Shortcut for single character strings */
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if (len == 1)
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return PyBool_FromLong(Py_ISUPPER(*p));
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/* Special case for empty strings */
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if (len == 0)
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Py_RETURN_FALSE;
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e = p + len;
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cased = 0;
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for (; p < e; p++) {
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if (Py_ISLOWER(*p))
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Py_RETURN_FALSE;
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else if (!cased && Py_ISUPPER(*p))
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cased = 1;
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}
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return PyBool_FromLong(cased);
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}
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PyDoc_STRVAR_shared(_Py_istitle__doc__,
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"B.istitle() -> bool\n\
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\n\
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Return True if B is a titlecased string and there is at least one\n\
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character in B, i.e. uppercase characters may only follow uncased\n\
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characters and lowercase characters only cased ones. Return False\n\
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otherwise.");
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PyObject*
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_Py_bytes_istitle(const char *cptr, Py_ssize_t len)
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{
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const unsigned char *p
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= (unsigned char *) cptr;
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const unsigned char *e;
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int cased, previous_is_cased;
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/* Shortcut for single character strings */
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if (len == 1)
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return PyBool_FromLong(Py_ISUPPER(*p));
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/* Special case for empty strings */
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if (len == 0)
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Py_RETURN_FALSE;
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e = p + len;
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cased = 0;
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previous_is_cased = 0;
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for (; p < e; p++) {
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const unsigned char ch = *p;
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if (Py_ISUPPER(ch)) {
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if (previous_is_cased)
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Py_RETURN_FALSE;
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previous_is_cased = 1;
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cased = 1;
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}
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else if (Py_ISLOWER(ch)) {
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if (!previous_is_cased)
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Py_RETURN_FALSE;
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previous_is_cased = 1;
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cased = 1;
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}
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else
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previous_is_cased = 0;
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}
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return PyBool_FromLong(cased);
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}
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PyDoc_STRVAR_shared(_Py_lower__doc__,
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"B.lower() -> copy of B\n\
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\n\
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Return a copy of B with all ASCII characters converted to lowercase.");
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void
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_Py_bytes_lower(char *result, const char *cptr, Py_ssize_t len)
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{
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Py_ssize_t i;
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for (i = 0; i < len; i++) {
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result[i] = Py_TOLOWER((unsigned char) cptr[i]);
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}
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}
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PyDoc_STRVAR_shared(_Py_upper__doc__,
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"B.upper() -> copy of B\n\
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\n\
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Return a copy of B with all ASCII characters converted to uppercase.");
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void
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_Py_bytes_upper(char *result, const char *cptr, Py_ssize_t len)
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{
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Py_ssize_t i;
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for (i = 0; i < len; i++) {
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result[i] = Py_TOUPPER((unsigned char) cptr[i]);
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}
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}
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PyDoc_STRVAR_shared(_Py_title__doc__,
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"B.title() -> copy of B\n\
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\n\
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Return a titlecased version of B, i.e. ASCII words start with uppercase\n\
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characters, all remaining cased characters have lowercase.");
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void
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_Py_bytes_title(char *result, const char *s, Py_ssize_t len)
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{
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Py_ssize_t i;
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int previous_is_cased = 0;
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for (i = 0; i < len; i++) {
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int c = Py_CHARMASK(*s++);
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if (Py_ISLOWER(c)) {
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if (!previous_is_cased)
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c = Py_TOUPPER(c);
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previous_is_cased = 1;
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} else if (Py_ISUPPER(c)) {
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if (previous_is_cased)
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c = Py_TOLOWER(c);
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previous_is_cased = 1;
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} else
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previous_is_cased = 0;
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*result++ = c;
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}
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}
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PyDoc_STRVAR_shared(_Py_capitalize__doc__,
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"B.capitalize() -> copy of B\n\
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\n\
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Return a copy of B with only its first character capitalized (ASCII)\n\
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and the rest lower-cased.");
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void
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_Py_bytes_capitalize(char *result, const char *s, Py_ssize_t len)
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{
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Py_ssize_t i;
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if (0 < len) {
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int c = Py_CHARMASK(*s++);
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if (Py_ISLOWER(c))
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*result = Py_TOUPPER(c);
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else
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*result = c;
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result++;
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}
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for (i = 1; i < len; i++) {
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int c = Py_CHARMASK(*s++);
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if (Py_ISUPPER(c))
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*result = Py_TOLOWER(c);
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else
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*result = c;
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result++;
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}
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}
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PyDoc_STRVAR_shared(_Py_swapcase__doc__,
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"B.swapcase() -> copy of B\n\
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\n\
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Return a copy of B with uppercase ASCII characters converted\n\
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to lowercase ASCII and vice versa.");
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void
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_Py_bytes_swapcase(char *result, const char *s, Py_ssize_t len)
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{
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Py_ssize_t i;
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for (i = 0; i < len; i++) {
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int c = Py_CHARMASK(*s++);
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if (Py_ISLOWER(c)) {
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*result = Py_TOUPPER(c);
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}
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else if (Py_ISUPPER(c)) {
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*result = Py_TOLOWER(c);
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}
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else
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*result = c;
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result++;
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}
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}
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PyDoc_STRVAR_shared(_Py_maketrans__doc__,
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"B.maketrans(frm, to) -> translation table\n\
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\n\
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Return a translation table (a bytes object of length 256) suitable\n\
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for use in the bytes or bytearray translate method where each byte\n\
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in frm is mapped to the byte at the same position in to.\n\
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The bytes objects frm and to must be of the same length.");
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PyObject *
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_Py_bytes_maketrans(Py_buffer *frm, Py_buffer *to)
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{
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PyObject *res = NULL;
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Py_ssize_t i;
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char *p;
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if (frm->len != to->len) {
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PyErr_Format(PyExc_ValueError,
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"maketrans arguments must have same length");
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return NULL;
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}
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res = PyBytes_FromStringAndSize(NULL, 256);
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if (!res)
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return NULL;
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p = PyBytes_AS_STRING(res);
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for (i = 0; i < 256; i++)
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p[i] = (char) i;
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for (i = 0; i < frm->len; i++) {
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p[((unsigned char *)frm->buf)[i]] = ((char *)to->buf)[i];
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}
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return res;
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}
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#define FASTSEARCH fastsearch
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#define STRINGLIB(F) stringlib_##F
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#define STRINGLIB_CHAR char
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#define STRINGLIB_SIZEOF_CHAR 1
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#include "stringlib/fastsearch.h"
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#include "stringlib/count.h"
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#include "stringlib/find.h"
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/*
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Wraps stringlib_parse_args_finds() and additionally checks whether the
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first argument is an integer in range(0, 256).
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If this is the case, writes the integer value to the byte parameter
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and sets subobj to NULL. Otherwise, sets the first argument to subobj
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and doesn't touch byte. The other parameters are similar to those of
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stringlib_parse_args_finds().
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*/
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Py_LOCAL_INLINE(int)
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parse_args_finds_byte(const char *function_name, PyObject *args,
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PyObject **subobj, char *byte,
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Py_ssize_t *start, Py_ssize_t *end)
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{
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PyObject *tmp_subobj;
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Py_ssize_t ival;
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PyObject *err;
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if(!stringlib_parse_args_finds(function_name, args, &tmp_subobj,
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start, end))
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return 0;
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if (!PyNumber_Check(tmp_subobj)) {
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*subobj = tmp_subobj;
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return 1;
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}
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ival = PyNumber_AsSsize_t(tmp_subobj, PyExc_OverflowError);
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if (ival == -1) {
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err = PyErr_Occurred();
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if (err && !PyErr_GivenExceptionMatches(err, PyExc_OverflowError)) {
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PyErr_Clear();
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*subobj = tmp_subobj;
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return 1;
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}
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}
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if (ival < 0 || ival > 255) {
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PyErr_SetString(PyExc_ValueError, "byte must be in range(0, 256)");
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return 0;
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}
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*subobj = NULL;
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*byte = (char)ival;
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return 1;
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}
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/* helper macro to fixup start/end slice values */
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#define ADJUST_INDICES(start, end, len) \
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if (end > len) \
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end = len; \
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else if (end < 0) { \
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end += len; \
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if (end < 0) \
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end = 0; \
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} \
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if (start < 0) { \
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start += len; \
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if (start < 0) \
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start = 0; \
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}
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Py_LOCAL_INLINE(Py_ssize_t)
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find_internal(const char *str, Py_ssize_t len,
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const char *function_name, PyObject *args, int dir)
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{
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PyObject *subobj;
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char byte;
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Py_buffer subbuf;
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const char *sub;
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Py_ssize_t sub_len;
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Py_ssize_t start = 0, end = PY_SSIZE_T_MAX;
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Py_ssize_t res;
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if (!parse_args_finds_byte(function_name, args,
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&subobj, &byte, &start, &end))
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return -2;
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if (subobj) {
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if (PyObject_GetBuffer(subobj, &subbuf, PyBUF_SIMPLE) != 0)
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return -2;
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sub = subbuf.buf;
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sub_len = subbuf.len;
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}
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else {
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sub = &byte;
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sub_len = 1;
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}
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ADJUST_INDICES(start, end, len);
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if (end - start < sub_len)
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res = -1;
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else if (sub_len == 1) {
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if (dir > 0)
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res = stringlib_find_char(
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str + start, end - start,
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*sub);
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else
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res = stringlib_rfind_char(
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str + start, end - start,
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*sub);
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if (res >= 0)
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res += start;
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}
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else {
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if (dir > 0)
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res = stringlib_find_slice(
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str, len,
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sub, sub_len, start, end);
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else
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res = stringlib_rfind_slice(
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str, len,
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sub, sub_len, start, end);
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}
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if (subobj)
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PyBuffer_Release(&subbuf);
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return res;
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}
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PyDoc_STRVAR_shared(_Py_find__doc__,
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"B.find(sub[, start[, end]]) -> int\n\
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\n\
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Return the lowest index in B where subsection sub is found,\n\
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such that sub is contained within B[start,end]. Optional\n\
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arguments start and end are interpreted as in slice notation.\n\
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\n\
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Return -1 on failure.");
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PyObject *
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_Py_bytes_find(const char *str, Py_ssize_t len, PyObject *args)
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{
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Py_ssize_t result = find_internal(str, len, "find", args, +1);
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if (result == -2)
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return NULL;
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return PyLong_FromSsize_t(result);
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}
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PyDoc_STRVAR_shared(_Py_index__doc__,
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"B.index(sub[, start[, end]]) -> int\n\
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\n\
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Like B.find() but raise ValueError when the subsection is not found.");
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PyObject *
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_Py_bytes_index(const char *str, Py_ssize_t len, PyObject *args)
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{
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Py_ssize_t result = find_internal(str, len, "index", args, +1);
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if (result == -2)
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return NULL;
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if (result == -1) {
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PyErr_SetString(PyExc_ValueError,
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"subsection not found");
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return NULL;
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}
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return PyLong_FromSsize_t(result);
|
|
}
|
|
|
|
PyDoc_STRVAR_shared(_Py_rfind__doc__,
|
|
"B.rfind(sub[, start[, end]]) -> int\n\
|
|
\n\
|
|
Return the highest index in B where subsection 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.");
|
|
|
|
PyObject *
|
|
_Py_bytes_rfind(const char *str, Py_ssize_t len, PyObject *args)
|
|
{
|
|
Py_ssize_t result = find_internal(str, len, "rfind", args, -1);
|
|
if (result == -2)
|
|
return NULL;
|
|
return PyLong_FromSsize_t(result);
|
|
}
|
|
|
|
PyDoc_STRVAR_shared(_Py_rindex__doc__,
|
|
"B.rindex(sub[, start[, end]]) -> int\n\
|
|
\n\
|
|
Like B.rfind() but raise ValueError when the subsection is not found.");
|
|
|
|
PyObject *
|
|
_Py_bytes_rindex(const char *str, Py_ssize_t len, PyObject *args)
|
|
{
|
|
Py_ssize_t result = find_internal(str, len, "rindex", args, -1);
|
|
if (result == -2)
|
|
return NULL;
|
|
if (result == -1) {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"subsection not found");
|
|
return NULL;
|
|
}
|
|
return PyLong_FromSsize_t(result);
|
|
}
|
|
|
|
PyDoc_STRVAR_shared(_Py_count__doc__,
|
|
"B.count(sub[, start[, end]]) -> int\n\
|
|
\n\
|
|
Return the number of non-overlapping occurrences of subsection sub in\n\
|
|
bytes B[start:end]. Optional arguments start and end are interpreted\n\
|
|
as in slice notation.");
|
|
|
|
PyObject *
|
|
_Py_bytes_count(const char *str, Py_ssize_t len, PyObject *args)
|
|
{
|
|
PyObject *sub_obj;
|
|
const char *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 (!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, len);
|
|
|
|
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;
|
|
}
|
|
|
|
int
|
|
_Py_bytes_contains(const char *str, Py_ssize_t len, 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(str, len,
|
|
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(str, (int) ival, len) != NULL;
|
|
}
|
|
|
|
|
|
/* Matches the end (direction >= 0) or start (direction < 0) of the buffer
|
|
* against substr, using the start and end arguments. Returns
|
|
* -1 on error, 0 if not found and 1 if found.
|
|
*/
|
|
Py_LOCAL(int)
|
|
tailmatch(const char *str, Py_ssize_t len, PyObject *substr,
|
|
Py_ssize_t start, Py_ssize_t end, int direction)
|
|
{
|
|
Py_buffer sub_view = {NULL, NULL};
|
|
const char *sub;
|
|
Py_ssize_t slen;
|
|
|
|
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;
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
Py_LOCAL(PyObject *)
|
|
_Py_bytes_tailmatch(const char *str, Py_ssize_t len,
|
|
const char *function_name, PyObject *args,
|
|
int direction)
|
|
{
|
|
Py_ssize_t start = 0;
|
|
Py_ssize_t end = PY_SSIZE_T_MAX;
|
|
PyObject *subobj;
|
|
int result;
|
|
|
|
if (!stringlib_parse_args_finds(function_name, args, &subobj, &start, &end))
|
|
return NULL;
|
|
if (PyTuple_Check(subobj)) {
|
|
Py_ssize_t i;
|
|
for (i = 0; i < PyTuple_GET_SIZE(subobj); i++) {
|
|
result = tailmatch(str, len, PyTuple_GET_ITEM(subobj, i),
|
|
start, end, direction);
|
|
if (result == -1)
|
|
return NULL;
|
|
else if (result) {
|
|
Py_RETURN_TRUE;
|
|
}
|
|
}
|
|
Py_RETURN_FALSE;
|
|
}
|
|
result = tailmatch(str, len, subobj, start, end, direction);
|
|
if (result == -1) {
|
|
if (PyErr_ExceptionMatches(PyExc_TypeError))
|
|
PyErr_Format(PyExc_TypeError,
|
|
"%s first arg must be bytes or a tuple of bytes, "
|
|
"not %s",
|
|
function_name, Py_TYPE(subobj)->tp_name);
|
|
return NULL;
|
|
}
|
|
else
|
|
return PyBool_FromLong(result);
|
|
}
|
|
|
|
PyDoc_STRVAR_shared(_Py_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.");
|
|
|
|
PyObject *
|
|
_Py_bytes_startswith(const char *str, Py_ssize_t len, PyObject *args)
|
|
{
|
|
return _Py_bytes_tailmatch(str, len, "startswith", args, -1);
|
|
}
|
|
|
|
PyDoc_STRVAR_shared(_Py_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.");
|
|
|
|
PyObject *
|
|
_Py_bytes_endswith(const char *str, Py_ssize_t len, PyObject *args)
|
|
{
|
|
return _Py_bytes_tailmatch(str, len, "endswith", args, +1);
|
|
}
|
|
|
|
PyDoc_STRVAR_shared(_Py_expandtabs__doc__,
|
|
"B.expandtabs(tabsize=8) -> copy of B\n\
|
|
\n\
|
|
Return a copy of B where all tab characters are expanded using spaces.\n\
|
|
If tabsize is not given, a tab size of 8 characters is assumed.");
|
|
|
|
PyDoc_STRVAR_shared(_Py_ljust__doc__,
|
|
"B.ljust(width[, fillchar]) -> copy of B\n"
|
|
"\n"
|
|
"Return B left justified in a string of length width. Padding is\n"
|
|
"done using the specified fill character (default is a space).");
|
|
|
|
PyDoc_STRVAR_shared(_Py_rjust__doc__,
|
|
"B.rjust(width[, fillchar]) -> copy of B\n"
|
|
"\n"
|
|
"Return B right justified in a string of length width. Padding is\n"
|
|
"done using the specified fill character (default is a space)");
|
|
|
|
PyDoc_STRVAR_shared(_Py_center__doc__,
|
|
"B.center(width[, fillchar]) -> copy of B\n"
|
|
"\n"
|
|
"Return B centered in a string of length width. Padding is\n"
|
|
"done using the specified fill character (default is a space).");
|
|
|
|
PyDoc_STRVAR_shared(_Py_zfill__doc__,
|
|
"B.zfill(width) -> copy of B\n"
|
|
"\n"
|
|
"Pad a numeric string B with zeros on the left, to fill a field\n"
|
|
"of the specified width. B is never truncated.");
|
|
|