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cpython/Objects/bytes_methods.c

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#include "Python.h"
#include "bytes_methods.h"
PyDoc_STRVAR_shared(_Py_isspace__doc__,
"B.isspace() -> bool\n\
\n\
Return True if all characters in B are whitespace\n\
and there is at least one character in B, False otherwise.");
PyObject*
_Py_bytes_isspace(const char *cptr, Py_ssize_t len)
{
register const unsigned char *p
= (unsigned char *) cptr;
register const unsigned char *e;
/* Shortcut for single character strings */
if (len == 1 && Py_ISSPACE(*p))
Py_RETURN_TRUE;
/* Special case for empty strings */
if (len == 0)
Py_RETURN_FALSE;
e = p + len;
for (; p < e; p++) {
if (!Py_ISSPACE(*p))
Py_RETURN_FALSE;
}
Py_RETURN_TRUE;
}
PyDoc_STRVAR_shared(_Py_isalpha__doc__,
"B.isalpha() -> bool\n\
\n\
Return True if all characters in B are alphabetic\n\
and there is at least one character in B, False otherwise.");
PyObject*
_Py_bytes_isalpha(const char *cptr, Py_ssize_t len)
{
register const unsigned char *p
= (unsigned char *) cptr;
register const unsigned char *e;
/* Shortcut for single character strings */
if (len == 1 && Py_ISALPHA(*p))
Py_RETURN_TRUE;
/* Special case for empty strings */
if (len == 0)
Py_RETURN_FALSE;
e = p + len;
for (; p < e; p++) {
if (!Py_ISALPHA(*p))
Py_RETURN_FALSE;
}
Py_RETURN_TRUE;
}
PyDoc_STRVAR_shared(_Py_isalnum__doc__,
"B.isalnum() -> bool\n\
\n\
Return True if all characters in B are alphanumeric\n\
and there is at least one character in B, False otherwise.");
PyObject*
_Py_bytes_isalnum(const char *cptr, Py_ssize_t len)
{
register const unsigned char *p
= (unsigned char *) cptr;
register const unsigned char *e;
/* Shortcut for single character strings */
if (len == 1 && Py_ISALNUM(*p))
Py_RETURN_TRUE;
/* Special case for empty strings */
if (len == 0)
Py_RETURN_FALSE;
e = p + len;
for (; p < e; p++) {
if (!Py_ISALNUM(*p))
Py_RETURN_FALSE;
}
Py_RETURN_TRUE;
}
PyDoc_STRVAR_shared(_Py_isdigit__doc__,
"B.isdigit() -> bool\n\
\n\
Return True if all characters in B are digits\n\
and there is at least one character in B, False otherwise.");
PyObject*
_Py_bytes_isdigit(const char *cptr, Py_ssize_t len)
{
register const unsigned char *p
= (unsigned char *) cptr;
register const unsigned char *e;
/* Shortcut for single character strings */
if (len == 1 && Py_ISDIGIT(*p))
Py_RETURN_TRUE;
/* Special case for empty strings */
if (len == 0)
Py_RETURN_FALSE;
e = p + len;
for (; p < e; p++) {
if (!Py_ISDIGIT(*p))
Py_RETURN_FALSE;
}
Py_RETURN_TRUE;
}
PyDoc_STRVAR_shared(_Py_islower__doc__,
"B.islower() -> bool\n\
\n\
Return True if all cased characters in B are lowercase and there is\n\
at least one cased character in B, False otherwise.");
PyObject*
_Py_bytes_islower(const char *cptr, Py_ssize_t len)
{
register const unsigned char *p
= (unsigned char *) cptr;
register const unsigned char *e;
int cased;
/* Shortcut for single character strings */
if (len == 1)
return PyBool_FromLong(Py_ISLOWER(*p));
/* Special case for empty strings */
if (len == 0)
Py_RETURN_FALSE;
e = p + len;
cased = 0;
for (; p < e; p++) {
if (Py_ISUPPER(*p))
Py_RETURN_FALSE;
else if (!cased && Py_ISLOWER(*p))
cased = 1;
}
return PyBool_FromLong(cased);
}
PyDoc_STRVAR_shared(_Py_isupper__doc__,
"B.isupper() -> bool\n\
\n\
Return True if all cased characters in B are uppercase and there is\n\
at least one cased character in B, False otherwise.");
PyObject*
_Py_bytes_isupper(const char *cptr, Py_ssize_t len)
{
register const unsigned char *p
= (unsigned char *) cptr;
register const unsigned char *e;
int cased;
/* Shortcut for single character strings */
if (len == 1)
return PyBool_FromLong(Py_ISUPPER(*p));
/* Special case for empty strings */
if (len == 0)
Py_RETURN_FALSE;
e = p + len;
cased = 0;
for (; p < e; p++) {
if (Py_ISLOWER(*p))
Py_RETURN_FALSE;
else if (!cased && Py_ISUPPER(*p))
cased = 1;
}
return PyBool_FromLong(cased);
}
PyDoc_STRVAR_shared(_Py_istitle__doc__,
"B.istitle() -> bool\n\
\n\
Return True if B is a titlecased string and there is at least one\n\
character in B, i.e. uppercase characters may only follow uncased\n\
characters and lowercase characters only cased ones. Return False\n\
otherwise.");
PyObject*
_Py_bytes_istitle(const char *cptr, Py_ssize_t len)
{
register const unsigned char *p
= (unsigned char *) cptr;
register const unsigned char *e;
int cased, previous_is_cased;
/* Shortcut for single character strings */
if (len == 1)
return PyBool_FromLong(Py_ISUPPER(*p));
/* Special case for empty strings */
if (len == 0)
Py_RETURN_FALSE;
e = p + len;
cased = 0;
previous_is_cased = 0;
for (; p < e; p++) {
register const unsigned char ch = *p;
if (Py_ISUPPER(ch)) {
if (previous_is_cased)
Py_RETURN_FALSE;
previous_is_cased = 1;
cased = 1;
}
else if (Py_ISLOWER(ch)) {
if (!previous_is_cased)
Py_RETURN_FALSE;
previous_is_cased = 1;
cased = 1;
}
else
previous_is_cased = 0;
}
return PyBool_FromLong(cased);
}
PyDoc_STRVAR_shared(_Py_lower__doc__,
"B.lower() -> copy of B\n\
\n\
Return a copy of B with all ASCII characters converted to lowercase.");
void
_Py_bytes_lower(char *result, const char *cptr, Py_ssize_t len)
{
Py_ssize_t i;
/*
newobj = PyString_FromStringAndSize(NULL, len);
if (!newobj)
return NULL;
s = PyString_AS_STRING(newobj);
*/
Py_MEMCPY(result, cptr, len);
for (i = 0; i < len; i++) {
int c = Py_CHARMASK(result[i]);
if (Py_ISUPPER(c))
result[i] = Py_TOLOWER(c);
}
}
PyDoc_STRVAR_shared(_Py_upper__doc__,
"B.upper() -> copy of B\n\
\n\
Return a copy of B with all ASCII characters converted to uppercase.");
void
_Py_bytes_upper(char *result, const char *cptr, Py_ssize_t len)
{
Py_ssize_t i;
/*
newobj = PyString_FromStringAndSize(NULL, len);
if (!newobj)
return NULL;
s = PyString_AS_STRING(newobj);
*/
Py_MEMCPY(result, cptr, len);
for (i = 0; i < len; i++) {
int c = Py_CHARMASK(result[i]);
if (Py_ISLOWER(c))
result[i] = Py_TOUPPER(c);
}
}
PyDoc_STRVAR_shared(_Py_title__doc__,
"B.title() -> copy of B\n\
\n\
Return a titlecased version of B, i.e. ASCII words start with uppercase\n\
characters, all remaining cased characters have lowercase.");
void
_Py_bytes_title(char *result, char *s, Py_ssize_t len)
{
Py_ssize_t i;
int previous_is_cased = 0;
/*
newobj = PyString_FromStringAndSize(NULL, len);
if (newobj == NULL)
return NULL;
s_new = PyString_AsString(newobj);
*/
for (i = 0; i < len; i++) {
int c = Py_CHARMASK(*s++);
if (Py_ISLOWER(c)) {
if (!previous_is_cased)
c = Py_TOUPPER(c);
previous_is_cased = 1;
} else if (Py_ISUPPER(c)) {
if (previous_is_cased)
c = Py_TOLOWER(c);
previous_is_cased = 1;
} else
previous_is_cased = 0;
*result++ = c;
}
}
PyDoc_STRVAR_shared(_Py_capitalize__doc__,
"B.capitalize() -> copy of B\n\
\n\
Return a copy of B with only its first character capitalized (ASCII).");
void
_Py_bytes_capitalize(char *result, char *s, Py_ssize_t len)
{
Py_ssize_t i;
/*
newobj = PyString_FromStringAndSize(NULL, len);
if (newobj == NULL)
return NULL;
s_new = PyString_AsString(newobj);
*/
if (0 < len) {
int c = Py_CHARMASK(*s++);
if (Py_ISLOWER(c))
*result = Py_TOUPPER(c);
else
*result = c;
result++;
}
for (i = 1; i < len; i++) {
int c = Py_CHARMASK(*s++);
if (Py_ISUPPER(c))
*result = Py_TOLOWER(c);
else
*result = c;
result++;
}
}
PyDoc_STRVAR_shared(_Py_swapcase__doc__,
"B.swapcase() -> copy of B\n\
\n\
Return a copy of B with uppercase ASCII characters converted\n\
to lowercase ASCII and vice versa.");
void
_Py_bytes_swapcase(char *result, char *s, Py_ssize_t len)
{
Py_ssize_t i;
/*
newobj = PyString_FromStringAndSize(NULL, len);
if (newobj == NULL)
return NULL;
s_new = PyString_AsString(newobj);
*/
for (i = 0; i < len; i++) {
int c = Py_CHARMASK(*s++);
if (Py_ISLOWER(c)) {
*result = Py_TOUPPER(c);
}
else if (Py_ISUPPER(c)) {
*result = Py_TOLOWER(c);
}
else
*result = c;
result++;
}
}
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