python-cstring/src/cstring.c at master · atpalmer-python/python-cstring · GitHub

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#include <Python.h>

#define WHITESPACE_CHARS " \t\n\v\f\r"

/* memrchr not available on some systems, so reimplement. */

const char *_memrchr(const char *s, int c, size_t n) {

for(const char *p = s + n - 1; p >= s; --p) {

if(*p == c)

return p;

}

return NULL;

}

const char *_strrstr(const char *s, const char *find) {

const char *p = s + strlen(s) - 1;

for(;p > s; --p) {

if(memcmp(p, find, strlen(find)) == 0)

return p;

}

return NULL;

}

struct cstring {

PyObject_VAR_HEAD

Py_hash_t hash;

char value[];

};

static PyTypeObject cstring_type;

#define CSTRING_HASH(self) (((struct cstring *)self)->hash)

#define CSTRING_VALUE(self) (((struct cstring *)self)->value)

#define CSTRING_VALUE_AT(self, i) (&CSTRING_VALUE(self)[(i)])

#define CSTRING_LAST_BYTE(self) (CSTRING_VALUE(self)[Py_SIZE(self) - 1])

#define CSTRING_ALLOC(tp, len) ((struct cstring *)(tp)->tp_alloc((tp), (len)))

/* singleton, initialized in cstring_new_empty */

static const struct cstring *cstring_EMPTY = NULL;

static void *_bad_argument_type(PyObject *o) {

PyErr_Format(

PyExc_TypeError,

"Bad argument type: %s",

Py_TYPE(o)->tp_name);

return NULL;

}

static PyObject *_cstring_new(PyTypeObject *type, const char *value, Py_ssize_t len) {

struct cstring *new = CSTRING_ALLOC(type, len + 1);

if(!new)

return NULL;

new->hash = -1;

memcpy(new->value, value, len);

CSTRING_LAST_BYTE(new) = '\0';

return (PyObject *)new;

}

static PyObject *_cstring_realloc(PyObject *self, Py_ssize_t len) {

if(Py_REFCNT(self) > 1)

return PyErr_BadInternalCall(), NULL;

struct cstring *new = PyObject_Realloc(self, sizeof(struct cstring) + len + 1);

if(!new)

return PyErr_NoMemory();

Py_SET_SIZE(new, len + 1);

new->hash = -1;

return (PyObject *)new;

}

static PyObject *_cstring_copy(PyObject *self) {

return _cstring_new(Py_TYPE(self), CSTRING_VALUE(self), Py_SIZE(self) - 1);

}

static PyObject *cstring_new_empty(void) {

if(!cstring_EMPTY) {

cstring_EMPTY = (struct cstring *)_cstring_new(&cstring_type, "", 0);

}

/* leaking one reference for singleton cache (never cleaned up) */

Py_INCREF(cstring_EMPTY);

return (PyObject *)cstring_EMPTY;

}

static const char *_obj_as_string_and_size(PyObject *o, Py_ssize_t *s) {

if(PyUnicode_Check(o))

return PyUnicode_AsUTF8AndSize(o, s);

if(PyObject_CheckBuffer(o)) {

/* handles bytes, bytearrays, arrays, memoryviews, etc. */

Py_buffer view;

if(PyObject_GetBuffer(o, &view, PyBUF_SIMPLE) < 0)

return NULL;

*s = view.len;

const char *buffer = view.buf;

PyBuffer_Release(&view);

return buffer;

}

if(PyObject_TypeCheck(o, &cstring_type)) {

/* TODO: implement buffer protocol for cstring */

*s = Py_SIZE(o) - 1;

return CSTRING_VALUE(o);

}

*s = -1;

return _bad_argument_type(o);

}

static PyObject *cstring_new(PyTypeObject *type, PyObject *args, PyObject *kwargs) {

PyObject *argobj = NULL;

if(!PyArg_ParseTuple(args, "O", &argobj))

return NULL;

if(PyObject_TypeCheck(argobj, type)) {

Py_INCREF(argobj);

return argobj;

}

Py_ssize_t len = 0;

const char *buffer = _obj_as_string_and_size(argobj, &len);

if(!buffer)

return NULL;

if(len == 0)

return cstring_new_empty();

return _cstring_new(type, buffer, len);

}

static void cstring_dealloc(PyObject *self) {

Py_TYPE(self)->tp_free(self);

}

static int _ensure_cstring(PyObject *self) {

if(PyObject_TypeCheck(self, &cstring_type))

return 1;

PyErr_Format(

PyExc_TypeError,

"Object must have type cstring, not %s.",

Py_TYPE(self)->tp_name);

return 0;

}

static PyObject *cstring_str(PyObject *self) {

return PyUnicode_FromString(CSTRING_VALUE(self));

}

static PyObject *cstring_repr(PyObject *self) {

PyObject *tmp = cstring_str(self);

PyObject *repr = PyObject_Repr(tmp);

Py_DECREF(tmp);

return repr;

}

static Py_hash_t cstring_hash(PyObject *self) {

if(CSTRING_HASH(self) == -1)

CSTRING_HASH(self) = _Py_HashBytes(CSTRING_VALUE(self), Py_SIZE(self));

return CSTRING_HASH(self);

}

static PyObject *cstring_richcompare(PyObject *self, PyObject *other, int op) {

if(!_ensure_cstring(other))

return NULL;

const char *left = CSTRING_VALUE(self);

const char *right = CSTRING_VALUE(other);

for(;*left && *right && *left == *right; ++left, ++right)

;

switch (op) {

case Py_EQ:

return PyBool_FromLong(*left == *right);

case Py_NE:

return PyBool_FromLong(*left != *right);

case Py_LT:

return PyBool_FromLong(*left < *right);

case Py_GT:

return PyBool_FromLong(*left > *right);

case Py_LE:

return PyBool_FromLong(*left <= *right);

case Py_GE:

return PyBool_FromLong(*left >= *right);

default:

Py_UNREACHABLE();

}

static Py_ssize_t cstring_len(PyObject *self) {

return Py_SIZE(self) - 1;

}

static PyObject *_concat_in_place(PyObject *self, PyObject *other) {

if(!other)

return PyErr_BadArgument(), NULL;

if(!_ensure_cstring(other))

return NULL;

if(!self)

return _cstring_copy(other); /* new (mutable) copy with refcnt=1 */

if(!_ensure_cstring(self))

return NULL;

Py_ssize_t origlen = cstring_len(self);

Py_ssize_t newlen = origlen + cstring_len(other);

PyObject *new = _cstring_realloc(self, newlen);

if(!new)

return NULL;

memcpy(CSTRING_VALUE_AT(new, origlen), CSTRING_VALUE(other), cstring_len(other));

CSTRING_LAST_BYTE(new) = '\0';

return new;

}

static PyObject *cstring_concat(PyObject *left, PyObject *right) {

if(!_ensure_cstring(left))

return NULL;

if(!_ensure_cstring(right))

return NULL;

Py_ssize_t size = cstring_len(left) + cstring_len(right) + 1;

struct cstring *new = CSTRING_ALLOC(Py_TYPE(left), size);

if(!new)

return NULL;

memcpy(new->value, CSTRING_VALUE(left), Py_SIZE(left));

memcpy(&new->value[cstring_len(left)], CSTRING_VALUE(right), Py_SIZE(right));

return (PyObject *)new;

}

static PyObject *cstring_repeat(PyObject *self, Py_ssize_t count) {

if(!_ensure_cstring(self))

return NULL;

if(count <= 0)

return cstring_new_empty();

Py_ssize_t size = (cstring_len(self) * count) + 1;

struct cstring *new = CSTRING_ALLOC(Py_TYPE(self), size);

if(!new)

return NULL;

for(Py_ssize_t i = 0; i < size - 1; i += cstring_len(self)) {

memcpy(&new->value[i], CSTRING_VALUE(self), Py_SIZE(self));

}

return (PyObject *)new;

}

static Py_ssize_t _ensure_valid_index(PyObject *self, Py_ssize_t i) {

if(i >= 0 && i < cstring_len(self))

return i;

PyErr_SetString(PyExc_IndexError, "Index is out of bounds");

return -1;

}

static PyObject *cstring_item(PyObject *self, Py_ssize_t i) {

if(_ensure_valid_index(self, i) < 0)

return NULL;

return _cstring_new(Py_TYPE(self), CSTRING_VALUE_AT(self, i), 1);

}

static int cstring_contains(PyObject *self, PyObject *arg) {

if(!_ensure_cstring(arg))

return -1;

if(strstr(CSTRING_VALUE(self), CSTRING_VALUE(arg)))

return 1;

return 0;

}

static PyObject *_cstring_subscript_index(PyObject *self, PyObject *index) {

Py_ssize_t i = PyNumber_AsSsize_t(index, PyExc_IndexError);

if(PyErr_Occurred())

return NULL;

if(i < 0)

i += cstring_len(self);

return cstring_item(self, i);

}

static PyObject *_cstring_subscript_slice(PyObject *self, PyObject *slice) {

Py_ssize_t start, stop, step;

if(PySlice_Unpack(slice, &start, &stop, &step) < 0)

return NULL;

Py_ssize_t slicelen = PySlice_AdjustIndices(cstring_len(self), &start, &stop, step);

struct cstring *new = CSTRING_ALLOC(Py_TYPE(self), slicelen + 1);

if(!new)

return NULL;

char *src = CSTRING_VALUE_AT(self, start);

for(Py_ssize_t i = 0; i < slicelen; ++i) {

new->value[i] = *src;

src += step;

}

new->value[slicelen] = '\0';

return (PyObject *)new;

}

static PyObject *cstring_subscript(PyObject *self, PyObject *key) {

if(PyIndex_Check(key))

return _cstring_subscript_index(self, key);

if(PySlice_Check(key))

return _cstring_subscript_slice(self, key);

PyErr_SetString(PyExc_TypeError, "Subscript must be int or slice.");

return NULL;

}

static Py_ssize_t _fix_index(Py_ssize_t i, Py_ssize_t len) {

Py_ssize_t result = i;

if(result < 0)

result += len;

if(result < 0)

result = 0;

if(result > len)

result = len;

return result;

}

struct _substr_params {

const char *start;

const char *end;

const char *substr;

Py_ssize_t substr_len;

};

static struct _substr_params *_parse_substr_args(PyObject *self, PyObject *args, struct _substr_params *params) {

PyObject *substr_obj;

Py_ssize_t start = 0;

Py_ssize_t end = PY_SSIZE_T_MAX;

if(!PyArg_ParseTuple(args, "O|nn", &substr_obj, &start, &end))

return NULL;

Py_ssize_t substr_len;

const char *substr = _obj_as_string_and_size(substr_obj, &substr_len);

if(!substr)

return NULL;

start = _fix_index(start, cstring_len(self));

end = _fix_index(end, cstring_len(self));

params->start = CSTRING_VALUE_AT(self, start);

params->end = CSTRING_VALUE_AT(self, end);

params->substr = substr;

params->substr_len = substr_len;

return params;

}

PyDoc_STRVAR(count__doc__, "");

static PyObject *cstring_count(PyObject *self, PyObject *args) {

struct _substr_params params;

if(!_parse_substr_args(self, args, &params))

return NULL;

const char *p = params.start;

long result = 0;

while((p = strstr(p, params.substr)) != NULL) {

++result;

p += params.substr_len;

if(p >= params.end)

break;

}

return PyLong_FromLong(result);

}

static const char *_substr_params_str(const struct _substr_params *params) {

const char *p = strstr(params->start, params->substr);

if(!p || p + params->substr_len > params->end)

return NULL;

return p;

}

static const char *_substr_params_rstr(const struct _substr_params *params) {

const char *p = params->end - params->substr_len + 1;

for(;;) {

p = _memrchr(params->start, *params->substr, p - params->start);

if(!p)

goto done;

if(memcmp(p, params->substr, params->substr_len) == 0)

return p;

}

done:

return NULL;

}

PyDoc_STRVAR(find__doc__, "");

PyObject *cstring_find(PyObject *self, PyObject *args) {

struct _substr_params params;

if(!_parse_substr_args(self, args, &params))

return NULL;

const char *p = _substr_params_str(&params);

if(!p)

return PyLong_FromLong(-1);

return PyLong_FromSsize_t(p - CSTRING_VALUE(self));

}

PyDoc_STRVAR(index__doc__, "");

PyObject *cstring_index(PyObject *self, PyObject *args) {

struct _substr_params params;

if(!_parse_substr_args(self, args, &params))

return NULL;

const char *p = _substr_params_str(&params);

if(!p) {

PyErr_SetString(PyExc_ValueError, "substring not found");

return NULL;

}

return PyLong_FromSsize_t(p - CSTRING_VALUE(self));

}

PyDoc_STRVAR(isalnum__doc__, "");

PyObject *cstring_isalnum(PyObject *self, PyObject *args) {

const char *p = CSTRING_VALUE(self);

while(*p) {

if(!isalnum(*p))

Py_RETURN_FALSE;

++p;

}

Py_RETURN_TRUE;

}

PyDoc_STRVAR(isalpha__doc__, "");

PyObject *cstring_isalpha(PyObject *self, PyObject *args) {

const char *p = CSTRING_VALUE(self);

while(*p) {

if(!isalpha(*p))

Py_RETURN_FALSE;

++p;

}

Py_RETURN_TRUE;

}

PyDoc_STRVAR(isdigit__doc__, "");

PyObject *cstring_isdigit(PyObject *self, PyObject *args) {

const char *p = CSTRING_VALUE(self);

while(*p) {

if(!isdigit(*p))

Py_RETURN_FALSE;

++p;

}

Py_RETURN_TRUE;

}

PyDoc_STRVAR(islower__doc__, "");

PyObject *cstring_islower(PyObject *self, PyObject *args) {

const char *p = CSTRING_VALUE(self);

while(*p) {

if(isalpha(*p)) {

if(!islower(*p))

Py_RETURN_FALSE;

++p;

while(*p) {

if(isalpha(*p) && !islower(*p))

Py_RETURN_FALSE;

++p;

}

/* at least one lc alpha and no uc alphas */

Py_RETURN_TRUE;

}

++p;

}

Py_RETURN_FALSE;

}

PyDoc_STRVAR(isprintable__doc__, "");

PyObject *cstring_isprintable(PyObject *self, PyObject *args) {

const char *p = CSTRING_VALUE(self);

while(*p) {

if(!isprint(*p))

Py_RETURN_FALSE;

++p;

}

Py_RETURN_TRUE;

}

PyDoc_STRVAR(isspace__doc__, "");

PyObject *cstring_isspace(PyObject *self, PyObject *args) {

const char *p = CSTRING_VALUE(self);

while(*p) {

if(!isspace(*p))

Py_RETURN_FALSE;

++p;

}

return PyBool_FromLong(p != CSTRING_VALUE(self));

}

PyDoc_STRVAR(isupper__doc__, "");

PyObject *cstring_isupper(PyObject *self, PyObject *args) {

const char *p = CSTRING_VALUE(self);

while(*p) {

if(isalpha(*p)) {

if(!isupper(*p))

Py_RETURN_FALSE;

++p;

while(*p) {

if(isalpha(*p) && !isupper(*p))

Py_RETURN_FALSE;

++p;

}

/* at least one uc alpha and no lc alphas */

Py_RETURN_TRUE;

}

++p;

}

Py_RETURN_FALSE;

}

PyDoc_STRVAR(join__doc__, "");

PyObject *cstring_join(PyObject *self, PyObject *arg) {

PyObject *iter = PyObject_GetIter(arg);

if(!iter)

return NULL;

PyObject *result = NULL;

PyObject *item = NULL;

while((item = PyIter_Next(iter)) != NULL) {

if(result) {

PyObject *next = _concat_in_place(result, self);

if(!next)

goto fail;

result = next;

}

PyObject *next = _concat_in_place(result, item);

if(!next)

goto fail;

Py_DECREF(item);

result = next;

}

return result;

fail:

Py_XDECREF(item);

Py_XDECREF(result);

return NULL;

}

PyDoc_STRVAR(lower__doc__, "");

PyObject *cstring_lower(PyObject *self, PyObject *args) {

struct cstring *new = CSTRING_ALLOC(Py_TYPE(self), Py_SIZE(self));

if(!new)

return NULL;

const char *s = CSTRING_VALUE(self);

char *d = CSTRING_VALUE(new);

while((*d++ = tolower(*s++)) != '\0')

;

return (PyObject *)new;

}

static PyObject *_tuple_steal_refs(Py_ssize_t count, ...) {

PyObject *result = PyTuple_New(count);

if(!result)

return NULL;

va_list va;

va_start(va, count);

for(int i = 0; i < count; ++i) {

PyObject *o = va_arg(va, PyObject *);

if(!o)

goto fail;

PyTuple_SET_ITEM(result, i, o);

}

va_end(va);

return result;

fail:

Py_DECREF(result);

return NULL;

}

PyDoc_STRVAR(partition__doc__, "");

PyObject *cstring_partition(PyObject *self, PyObject *arg) {

if(!_ensure_cstring(arg))

return NULL;

const char *search = CSTRING_VALUE(arg);

const char *left = CSTRING_VALUE(self);

const char *mid = strstr(left, search);

if(!mid) {

return _tuple_steal_refs(3,

(Py_INCREF(self), self),

cstring_new_empty(),

cstring_new_empty());

}

const char *right = mid + strlen(search);

return _tuple_steal_refs(3,

_cstring_new(Py_TYPE(self), left, mid - left),

_cstring_new(Py_TYPE(self), mid, right - mid),

_cstring_new(Py_TYPE(self), right, &CSTRING_LAST_BYTE(self) - right));

}

PyDoc_STRVAR(rpartition__doc__, "");

PyObject *cstring_rpartition(PyObject *self, PyObject *arg) {

if(!_ensure_cstring(arg))

return NULL;

const char *search = CSTRING_VALUE(arg);

const char *left = CSTRING_VALUE(self);

const char *mid = _strrstr(left, search);

if(!mid) {

return _tuple_steal_refs(3,

cstring_new_empty(),

(Py_INCREF(self), self));

}

const char *right = mid + strlen(search);

return _tuple_steal_refs(3,

_cstring_new(Py_TYPE(self), left, mid - left),

_cstring_new(Py_TYPE(self), mid, right - mid),

_cstring_new(Py_TYPE(self), right, &CSTRING_LAST_BYTE(self) - right));

}

PyDoc_STRVAR(rfind__doc__, "");

PyObject *cstring_rfind(PyObject *self, PyObject *args) {

struct _substr_params params;

if(!_parse_substr_args(self, args, &params))

return NULL;

const char *p = _substr_params_rstr(&params);

if(!p)

return PyLong_FromLong(-1);

return PyLong_FromSsize_t(p - CSTRING_VALUE(self));

}

PyDoc_STRVAR(rindex__doc__, "");

PyObject *cstring_rindex(PyObject *self, PyObject *args) {

struct _substr_params params;

if(!_parse_substr_args(self, args, &params))

return NULL;

const char *p = _substr_params_rstr(&params);

if(!p) {

PyErr_SetString(PyExc_ValueError, "substring not found");

return NULL;

}

return PyLong_FromSsize_t(p - CSTRING_VALUE(self));

}

PyObject *_cstring_split_on_chars(PyObject *self, const char seps[], Py_ssize_t maxsplit) {

if(maxsplit < 0)

maxsplit = PY_SSIZE_T_MAX;

const char *start = CSTRING_VALUE(self);

PyObject *list = PyList_New(0);

if(!list)

return NULL;

while(*start) {

const char *end = start;

while(*end && !strchr(seps, *end))

++end;

PyObject *new = _cstring_new(Py_TYPE(self), start, end - start);

if(!new)

goto fail;

PyList_Append(list, new);

Py_DECREF(new);

const char *skip = end + 1;

while(*skip && strchr(seps, *skip))

++skip;

start = skip;

if(PyList_GET_SIZE(list) + 1 > maxsplit) {

PyObject *new = _cstring_new(Py_TYPE(self), start, strlen(start));

if(!new)

goto fail;

PyList_Append(list, new);

Py_DECREF(new);

break;

}

return list;

fail:

Py_DECREF(list);

return NULL;

}

PyObject *_cstring_split_on_cstring(PyObject *self, PyObject *sepobj, Py_ssize_t maxsplit) {

if(!_ensure_cstring(sepobj))

return NULL;

if(maxsplit < 0)

maxsplit = PY_SSIZE_T_MAX;

PyObject *list = PyList_New(0);

if(!list)

return NULL;

const char *sep = CSTRING_VALUE(sepobj);

const char *s = CSTRING_VALUE(self);

for(;;) {

const char *e = strstr(s, sep);

if(!e)

break;

PyObject *new = _cstring_new(Py_TYPE(self), s, e - s);

if(!new)

goto fail;

PyList_Append(list, new);

Py_DECREF(new);

s = e + strlen(sep);

if(PyList_GET_SIZE(list) + 1 > maxsplit)

break;

}

PyObject *new = _cstring_new(Py_TYPE(self), s, strlen(s));

if(!new)

goto fail;

PyList_Append(list, new);

return list;

fail:

Py_DECREF(list);

return NULL;

}

PyDoc_STRVAR(split__doc__, "");

PyObject *cstring_split(PyObject *self, PyObject *args, PyObject *kwargs) {

PyObject *sepobj = Py_None;

int maxsplit = -1;

char *kwlist[] = {"sep", "maxsplit", NULL};

if(!PyArg_ParseTupleAndKeywords(args, kwargs, "|Oi", kwlist, &sepobj, &maxsplit))

return NULL;

return (sepobj == Py_None)

? _cstring_split_on_chars(self, WHITESPACE_CHARS, maxsplit)

: _cstring_split_on_cstring(self, sepobj, maxsplit);

}

PyDoc_STRVAR(startswith__doc__, "");

PyObject *cstring_startswith(PyObject *self, PyObject *args) {

struct _substr_params params;

if(!_parse_substr_args(self, args, &params))

return NULL;

if(params.end - params.start < params.substr_len)

return PyBool_FromLong(0);

int cmp = memcmp(params.start, params.substr, params.substr_len);

return PyBool_FromLong(cmp == 0);

}

const char *_strip_chars_from_args(PyObject *args) {

PyObject *charsobj = NULL;

if(!PyArg_ParseTuple(args, "|O", &charsobj))

return NULL;

const char *chars = WHITESPACE_CHARS;

if(charsobj && charsobj != Py_None) {

if(!PyUnicode_Check(charsobj))

return _bad_argument_type(charsobj);

chars = PyUnicode_AsUTF8(charsobj);

}

return chars;

}

PyDoc_STRVAR(strip__doc__, "");

PyObject *cstring_strip(PyObject *self, PyObject *args) {

const char *chars = _strip_chars_from_args(args);

const char *start = CSTRING_VALUE(self);

while(strchr(chars, *start))

++start;

const char *end = &CSTRING_LAST_BYTE(self) - 1;

while(strchr(chars, *end))

--end;

Py_ssize_t newsize = end - start + 1;

return _cstring_new(Py_TYPE(self), start, newsize);

}

PyDoc_STRVAR(lstrip__doc__, "");

PyObject *cstring_lstrip(PyObject *self, PyObject *args) {

const char *chars = _strip_chars_from_args(args);

const char *start = CSTRING_VALUE(self);

while(strchr(chars, *start))

++start;

const char *end = &CSTRING_LAST_BYTE(self) - 1;

Py_ssize_t newsize = end - start + 1;

return _cstring_new(Py_TYPE(self), start, newsize);

}

PyDoc_STRVAR(rstrip__doc__, "");

PyObject *cstring_rstrip(PyObject *self, PyObject *args) {

const char *chars = _strip_chars_from_args(args);

const char *start = CSTRING_VALUE(self);

const char *end = &CSTRING_LAST_BYTE(self) - 1;

while(strchr(chars, *end))

--end;

Py_ssize_t newsize = end - start + 1;

return _cstring_new(Py_TYPE(self), start, newsize);

}

PyDoc_STRVAR(endswith__doc__, "");

PyObject *cstring_endswith(PyObject *self, PyObject *args) {

struct _substr_params params;

if(!_parse_substr_args(self, args, &params))

return NULL;

if(params.end - params.start < params.substr_len)

return PyBool_FromLong(0);

int cmp = memcmp(params.end - params.substr_len, params.substr, params.substr_len);

return PyBool_FromLong(cmp == 0);

}

PyDoc_STRVAR(swapcase__doc__, "");

PyObject *cstring_swapcase(PyObject *self, PyObject *args) {

struct cstring *new = CSTRING_ALLOC(Py_TYPE(self), Py_SIZE(self));

if(!new)

return NULL;

const char *s = CSTRING_VALUE(self);

char *d = CSTRING_VALUE(new);

for(;*s; ++s, ++d) {

if(islower(*s)) {

*d = toupper(*s);

} else if(isupper(*s)) {

*d = tolower(*s);

} else {

*d = *s;

}

return (PyObject *)new;

}

PyDoc_STRVAR(upper__doc__, "");

PyObject *cstring_upper(PyObject *self, PyObject *args) {

struct cstring *new = CSTRING_ALLOC(Py_TYPE(self), Py_SIZE(self));

if(!new)

return NULL;

const char *s = CSTRING_VALUE(self);

char *d = CSTRING_VALUE(new);

while((*d++ = toupper(*s++)) != '\0')

;

return (PyObject *)new;

}

static PySequenceMethods cstring_as_sequence = {

.sq_length = cstring_len,

.sq_concat = cstring_concat,

.sq_repeat = cstring_repeat,

.sq_item = cstring_item,

.sq_contains = cstring_contains,

};

static PyMappingMethods cstring_as_mapping = {

.mp_length = cstring_len,

.mp_subscript = cstring_subscript,

};

static PyMethodDef cstring_methods[] = {

/* TODO: capitalize */

/* TODO: casefold */

/* TODO: center */

{"count", cstring_count, METH_VARARGS, count__doc__},

/* TODO: encode (decode???) */

{"endswith", cstring_endswith, METH_VARARGS, endswith__doc__},

/* TODO: expandtabs */

{"find", cstring_find, METH_VARARGS, find__doc__},

/* TODO: format */

/* TODO: format_map */

{"index", cstring_index, METH_VARARGS, index__doc__},

{"isalnum", cstring_isalnum, METH_NOARGS, isalnum__doc__},

{"isalpha", cstring_isalpha, METH_NOARGS, isalpha__doc__},

/* TODO: isascii */

/* TODO: isdecimal */

{"isdigit", cstring_isdigit, METH_NOARGS, isdigit__doc__},

/* TODO: isidentifier */

{"islower", cstring_islower, METH_NOARGS, islower__doc__},

/* TODO: isnumeric */

{"isprintable", cstring_isprintable, METH_NOARGS, isprintable__doc__},

{"isspace", cstring_isspace, METH_NOARGS, isspace__doc__},

/* TODO: istitle */

{"isupper", cstring_isupper, METH_NOARGS, isupper__doc__},

{"join", cstring_join, METH_O, join__doc__},

/* TODO: ljust */

{"lower", cstring_lower, METH_NOARGS, lower__doc__},

{"lstrip", cstring_lstrip, METH_VARARGS, lstrip__doc__},

/* TODO: maketrans */

{"partition", cstring_partition, METH_O, partition__doc__},

/* TODO: removeprefix */

/* TODO: replace */

{"rfind", cstring_rfind, METH_VARARGS, rfind__doc__},

{"rindex", cstring_rindex, METH_VARARGS, rindex__doc__},

/* TODO: rjust */

{"rpartition", cstring_rpartition, METH_O, rpartition__doc__},

/* TODO: rsplit */

{"rstrip", cstring_rstrip, METH_VARARGS, rstrip__doc__},

{"split", (PyCFunction)cstring_split, METH_VARARGS | METH_KEYWORDS, split__doc__},

/* TODO: splitlines */

{"startswith", cstring_startswith, METH_VARARGS, startswith__doc__},

{"strip", cstring_strip, METH_VARARGS, strip__doc__},

{"swapcase", cstring_swapcase, METH_NOARGS, swapcase__doc__},

/* TODO: title */

/* TODO: translate */

{"upper", cstring_upper, METH_NOARGS, upper__doc__},

/* TODO: zfill */

{0},

};

static PyTypeObject cstring_type = {

PyVarObject_HEAD_INIT(NULL, 0)

.tp_name = "cstring.cstring",

.tp_doc = "",

.tp_basicsize = sizeof(struct cstring),

.tp_itemsize = sizeof(char),

.tp_flags = Py_TPFLAGS_DEFAULT,

.tp_new = cstring_new,

.tp_dealloc = cstring_dealloc,

.tp_richcompare = cstring_richcompare,

.tp_str = cstring_str,

.tp_repr = cstring_repr,

.tp_hash = cstring_hash,

.tp_as_sequence = &cstring_as_sequence,

.tp_as_mapping = &cstring_as_mapping,

.tp_methods = cstring_methods,

};

static struct PyModuleDef module = {

.m_base = PyModuleDef_HEAD_INIT,

.m_name = "cstring",

.m_doc = "",

.m_size = 0,

.m_methods = NULL,

};

PyMODINIT_FUNC PyInit_cstring(void) {

if(PyType_Ready(&cstring_type) < 0)

return NULL;

Py_INCREF(&cstring_type);

PyObject *m = PyModule_Create(&module);

PyModule_AddObject(m, "cstring", (PyObject *)&cstring_type);

return m;

}

python-cstring/src/cstring.c at master · atpalmer-python/python-cstring · GitHub

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