| /* |
| string_format.h -- implementation of string.format(). |
| |
| It uses the Objects/stringlib conventions, so that it can be |
| compiled for both unicode and string objects. |
| */ |
| |
| |
| /* Defines for more efficiently reallocating the string buffer */ |
| #define INITIAL_SIZE_INCREMENT 100 |
| #define SIZE_MULTIPLIER 2 |
| #define MAX_SIZE_INCREMENT 3200 |
| |
| |
| /************************************************************************/ |
| /*********** Global data structures and forward declarations *********/ |
| /************************************************************************/ |
| |
| /* |
| A SubString consists of the characters between two string or |
| unicode pointers. |
| */ |
| typedef struct { |
| STRINGLIB_CHAR *ptr; |
| STRINGLIB_CHAR *end; |
| } SubString; |
| |
| |
| /* forward declaration for recursion */ |
| static PyObject * |
| build_string(SubString *input, PyObject *args, PyObject *kwargs, |
| int *recursion_level); |
| |
| |
| |
| /************************************************************************/ |
| /************************** Utility functions ************************/ |
| /************************************************************************/ |
| |
| /* fill in a SubString from a pointer and length */ |
| Py_LOCAL_INLINE(void) |
| SubString_init(SubString *str, STRINGLIB_CHAR *p, Py_ssize_t len) |
| { |
| str->ptr = p; |
| if (p == NULL) |
| str->end = NULL; |
| else |
| str->end = str->ptr + len; |
| } |
| |
| Py_LOCAL_INLINE(PyObject *) |
| SubString_new_object(SubString *str) |
| { |
| return STRINGLIB_NEW(str->ptr, str->end - str->ptr); |
| } |
| |
| /************************************************************************/ |
| /*********** Error handling and exception generation **************/ |
| /************************************************************************/ |
| |
| /* |
| Most of our errors are value errors, because to Python, the |
| format string is a "value". Also, it's convenient to return |
| a NULL when we are erroring out. |
| |
| XXX: need better error handling, per PEP 3101. |
| */ |
| static void * |
| SetError(const char *s) |
| { |
| /* PyErr_Format always returns NULL */ |
| return PyErr_Format(PyExc_ValueError, "%s in format string", s); |
| } |
| |
| /* |
| check_input returns True if we still have characters |
| left in the input string. |
| |
| XXX: make this function go away when better error handling is |
| implemented. |
| */ |
| Py_LOCAL_INLINE(int) |
| check_input(SubString *input) |
| { |
| if (input->ptr < input->end) |
| return 1; |
| PyErr_SetString(PyExc_ValueError, |
| "unterminated replacement field"); |
| return 0; |
| } |
| |
| /************************************************************************/ |
| /*********** Output string management functions ****************/ |
| /************************************************************************/ |
| |
| typedef struct { |
| STRINGLIB_CHAR *ptr; |
| STRINGLIB_CHAR *end; |
| PyObject *obj; |
| Py_ssize_t size_increment; |
| } OutputString; |
| |
| /* initialize an OutputString object, reserving size characters */ |
| static int |
| output_initialize(OutputString *output, Py_ssize_t size) |
| { |
| output->obj = STRINGLIB_NEW(NULL, size); |
| if (output->obj == NULL) |
| return 0; |
| |
| output->ptr = STRINGLIB_STR(output->obj); |
| output->end = STRINGLIB_LEN(output->obj) + output->ptr; |
| output->size_increment = INITIAL_SIZE_INCREMENT; |
| |
| return 1; |
| } |
| |
| /* |
| output_extend reallocates the output string buffer. |
| It returns a status: 0 for a failed reallocation, |
| 1 for success. |
| */ |
| |
| static int |
| output_extend(OutputString *output, Py_ssize_t count) |
| { |
| STRINGLIB_CHAR *startptr = STRINGLIB_STR(output->obj); |
| Py_ssize_t curlen = output->ptr - startptr; |
| Py_ssize_t maxlen = curlen + count + output->size_increment; |
| |
| if (STRINGLIB_RESIZE(&output->obj, maxlen) < 0) |
| return 0; |
| startptr = STRINGLIB_STR(output->obj); |
| output->ptr = startptr + curlen; |
| output->end = startptr + maxlen; |
| if (output->size_increment < MAX_SIZE_INCREMENT) |
| output->size_increment *= SIZE_MULTIPLIER; |
| return 1; |
| } |
| |
| /* |
| output_data dumps characters into our output string |
| buffer. |
| |
| In some cases, it has to reallocate the string. |
| |
| It returns a status: 0 for a failed reallocation, |
| 1 for success. |
| */ |
| static int |
| output_data(OutputString *output, const STRINGLIB_CHAR *s, Py_ssize_t count) |
| { |
| if ((count > output->end - output->ptr) && !output_extend(output, count)) |
| return 0; |
| memcpy(output->ptr, s, count * sizeof(STRINGLIB_CHAR)); |
| output->ptr += count; |
| return 1; |
| } |
| |
| /************************************************************************/ |
| /*********** Format string parsing -- integers and identifiers *********/ |
| /************************************************************************/ |
| |
| /* |
| end_identifier returns true if a character marks |
| the end of an identifier string. |
| |
| Although the PEP specifies that identifiers are |
| numbers or valid Python identifiers, we just let |
| getattr/getitem handle that, so the implementation |
| is more flexible than the PEP would indicate. |
| */ |
| Py_LOCAL_INLINE(int) |
| end_identifier(STRINGLIB_CHAR c) |
| { |
| switch (c) { |
| case '.': case '[': case ']': |
| return 1; |
| default: |
| return 0; |
| } |
| } |
| |
| /* |
| get_integer consumes 0 or more decimal digit characters from an |
| input string, updates *result with the corresponding positive |
| integer, and returns the number of digits consumed. |
| |
| returns -1 on error. |
| */ |
| static int |
| get_integer(STRINGLIB_CHAR **ptr, STRINGLIB_CHAR *end, |
| Py_ssize_t *result) |
| { |
| Py_ssize_t accumulator, digitval, oldaccumulator; |
| int numdigits; |
| accumulator = numdigits = 0; |
| for (;;(*ptr)++, numdigits++) { |
| if (*ptr >= end) |
| break; |
| digitval = STRINGLIB_TODECIMAL(**ptr); |
| if (digitval < 0) |
| break; |
| /* |
| This trick was copied from old Unicode format code. It's cute, |
| but would really suck on an old machine with a slow divide |
| implementation. Fortunately, in the normal case we do not |
| expect too many digits. |
| */ |
| oldaccumulator = accumulator; |
| accumulator *= 10; |
| if ((accumulator+10)/10 != oldaccumulator+1) { |
| PyErr_Format(PyExc_ValueError, |
| "Too many decimal digits in format string"); |
| return -1; |
| } |
| accumulator += digitval; |
| } |
| *result = accumulator; |
| return numdigits; |
| } |
| |
| /* |
| get_identifier is a bit of a misnomer. It returns a value for use |
| with getattr or getindex. This value will a string/unicode |
| object. The input cannot be zero length. Continues until end of |
| input, or end_identifier() returns true. |
| */ |
| static PyObject * |
| get_identifier(SubString *input) |
| { |
| STRINGLIB_CHAR *start; |
| |
| for (start = input->ptr; |
| input->ptr < input->end && !end_identifier(*input->ptr); |
| input->ptr++) |
| ; |
| |
| return STRINGLIB_NEW(start, input->ptr - start); |
| |
| /* |
| We might want to add code here to check for invalid Python |
| identifiers. All identifiers are eventually passed to getattr |
| or getitem, so there is a check when used. However, we might |
| want to remove (or not) the ability to have strings like |
| "a/b" or " ab" or "-1" (which is not parsed as a number). |
| For now, this is left as an exercise for the first disgruntled |
| user... |
| |
| if (XXX -- need check function) { |
| Py_DECREF(result); |
| PyErr_SetString(PyExc_ValueError, |
| "Invalid embedded Python identifier"); |
| return NULL; |
| } |
| */ |
| } |
| |
| /************************************************************************/ |
| /******** Functions to get field objects and specification strings ******/ |
| /************************************************************************/ |
| |
| /* get_field_and_spec is the main function in this section. It parses |
| the format string well enough to return a field object to render along |
| with a field specification string. |
| */ |
| |
| /* |
| look up key in our keyword arguments |
| */ |
| static PyObject * |
| key_lookup(PyObject *kwargs, PyObject *key) |
| { |
| PyObject *result; |
| |
| if (kwargs && (result = PyDict_GetItem(kwargs, key)) != NULL) { |
| Py_INCREF(result); |
| return result; |
| } |
| return NULL; |
| } |
| |
| /* |
| get_field_object returns the object inside {}, before the |
| format_spec. It handles getindex and getattr lookups and consumes |
| the entire input string. |
| */ |
| static PyObject * |
| get_field_object(SubString *input, PyObject *args, PyObject *kwargs) |
| { |
| PyObject *myobj, *subobj, *newobj; |
| STRINGLIB_CHAR c; |
| Py_ssize_t index; |
| int isindex, isnumeric, isargument; |
| |
| index = isnumeric = 0; /* Just to shut up the compiler warnings */ |
| |
| myobj = args; |
| Py_INCREF(myobj); |
| |
| for (isindex=1, isargument=1;;) { |
| if (!check_input(input)) |
| break; |
| if (!isindex) { |
| if ((subobj = get_identifier(input)) == NULL) |
| break; |
| newobj = PyObject_GetAttr(myobj, subobj); |
| Py_DECREF(subobj); |
| } else { |
| isnumeric = (STRINGLIB_ISDECIMAL(*input->ptr)); |
| if (isnumeric) |
| /* XXX: add error checking */ |
| get_integer(&input->ptr, input->end, &index); |
| |
| if (isnumeric && PySequence_Check(myobj)) |
| newobj = PySequence_GetItem(myobj, index); |
| else { |
| /* XXX -- do we need PyLong_FromLongLong? |
| Using ssizet, not int... */ |
| subobj = isnumeric ? |
| PyInt_FromLong(index) : |
| get_identifier(input); |
| if (subobj == NULL) |
| break; |
| if (isargument) { |
| newobj = key_lookup(kwargs, subobj); |
| } else { |
| newobj = PyObject_GetItem(myobj, subobj); |
| } |
| Py_DECREF(subobj); |
| } |
| } |
| Py_DECREF(myobj); |
| myobj = newobj; |
| if (myobj == NULL) |
| break; |
| if (!isargument && isindex) |
| if ((!check_input(input)) || (*(input->ptr++) != ']')) { |
| SetError("Expected ]"); |
| break; |
| } |
| |
| /* if at the end of input, return with myobj */ |
| if (input->ptr >= input->end) |
| return myobj; |
| |
| c = *input->ptr; |
| input->ptr++; |
| isargument = 0; |
| isindex = (c == '['); |
| if (!isindex && (c != '.')) { |
| SetError("Expected ., [, :, !, or }"); |
| break; |
| } |
| } |
| if ((myobj == NULL) && isargument) { |
| /* XXX: include more useful error information, like which |
| * keyword not found or which index missing */ |
| PyErr_Clear(); |
| return SetError(isnumeric |
| ? "Not enough positional arguments" |
| : "Keyword argument not found"); |
| } |
| Py_XDECREF(myobj); |
| return NULL; |
| } |
| |
| /************************************************************************/ |
| /***************** Field rendering functions **************************/ |
| /************************************************************************/ |
| |
| /* |
| render_field() is the main function in this section. It takes the |
| field object and field specification string generated by |
| get_field_and_spec, and renders the field into the output string. |
| |
| format() does the actual calling of the objects __format__ method. |
| */ |
| |
| |
| /* returns fieldobj.__format__(format_spec) */ |
| static PyObject * |
| format(PyObject *fieldobj, SubString *format_spec) |
| { |
| static PyObject *format_str = NULL; |
| PyObject *meth; |
| PyObject *spec = NULL; |
| PyObject *result = NULL; |
| |
| /* Initialize cached value */ |
| if (format_str == NULL) { |
| /* Initialize static variable needed by _PyType_Lookup */ |
| format_str = PyUnicode_FromString("__format__"); |
| if (format_str == NULL) |
| return NULL; |
| } |
| |
| /* Make sure the type is initialized. float gets initialized late */ |
| if (Py_Type(fieldobj)->tp_dict == NULL) |
| if (PyType_Ready(Py_Type(fieldobj)) < 0) |
| return NULL; |
| |
| /* we need to create an object out of the pointers we have */ |
| spec = SubString_new_object(format_spec); |
| if (spec == NULL) |
| goto done; |
| |
| /* Find the (unbound!) __format__ method (a borrowed reference) */ |
| meth = _PyType_Lookup(Py_Type(fieldobj), format_str); |
| if (meth == NULL) { |
| PyErr_Format(PyExc_TypeError, |
| "Type %.100s doesn't define __format__", |
| Py_Type(fieldobj)->tp_name); |
| goto done; |
| } |
| |
| /* And call it, binding it to the value */ |
| result = PyObject_CallFunctionObjArgs(meth, fieldobj, spec, NULL); |
| if (result == NULL) |
| goto done; |
| |
| if (!STRINGLIB_CHECK(result)) { |
| PyErr_SetString(PyExc_TypeError, |
| "__format__ method did not return " |
| STRINGLIB_TYPE_NAME); |
| Py_DECREF(result); |
| result = NULL; |
| goto done; |
| } |
| |
| done: |
| Py_XDECREF(spec); |
| return result; |
| } |
| |
| /* |
| render_field calls fieldobj.__format__(format_spec) method, and |
| appends to the output. |
| */ |
| static int |
| render_field(PyObject *fieldobj, SubString *format_spec, OutputString *output) |
| { |
| int ok = 0; |
| PyObject *result = format(fieldobj, format_spec); |
| |
| if (result == NULL) |
| goto done; |
| |
| ok = output_data(output, |
| STRINGLIB_STR(result), STRINGLIB_LEN(result)); |
| done: |
| Py_XDECREF(result); |
| return ok; |
| } |
| |
| static int |
| parse_field(SubString *str, SubString *field_name, SubString *format_spec, |
| STRINGLIB_CHAR *conversion) |
| { |
| STRINGLIB_CHAR c = 0; |
| |
| /* initialize these, as they may be empty */ |
| *conversion = '\0'; |
| SubString_init(format_spec, NULL, 0); |
| |
| /* search for the field name. it's terminated by the end of the |
| string, or a ':' or '!' */ |
| field_name->ptr = str->ptr; |
| while (str->ptr < str->end) { |
| switch (c = *(str->ptr++)) { |
| case ':': |
| case '!': |
| break; |
| default: |
| continue; |
| } |
| break; |
| } |
| |
| if (c == '!' || c == ':') { |
| /* we have a format specifier and/or a conversion */ |
| /* don't include the last character */ |
| field_name->end = str->ptr-1; |
| |
| /* the format specifier is the rest of the string */ |
| format_spec->ptr = str->ptr; |
| format_spec->end = str->end; |
| |
| /* see if there's a conversion specifier */ |
| if (c == '!') { |
| /* there must be another character present */ |
| if (format_spec->ptr >= format_spec->end) { |
| PyErr_SetString(PyExc_ValueError, |
| "end of format while looking for conversion " |
| "specifier"); |
| return 0; |
| } |
| *conversion = *(format_spec->ptr++); |
| |
| /* if there is another character, it must be a colon */ |
| if (format_spec->ptr < format_spec->end) { |
| c = *(format_spec->ptr++); |
| if (c != ':') { |
| PyErr_SetString(PyExc_ValueError, |
| "expected ':' after format specifier"); |
| return 0; |
| } |
| } |
| } |
| |
| return 1; |
| |
| } else { |
| /* end of string, there's no format_spec or conversion */ |
| field_name->end = str->ptr; |
| return 1; |
| } |
| } |
| |
| /************************************************************************/ |
| /******* Output string allocation and escape-to-markup processing ******/ |
| /************************************************************************/ |
| |
| /* MarkupIterator breaks the string into pieces of either literal |
| text, or things inside {} that need to be marked up. it is |
| designed to make it easy to wrap a Python iterator around it, for |
| use with the Formatter class */ |
| |
| typedef struct { |
| SubString str; |
| int in_markup; |
| } MarkupIterator; |
| |
| static int |
| MarkupIterator_init(MarkupIterator *self, STRINGLIB_CHAR *ptr, Py_ssize_t len) |
| { |
| SubString_init(&self->str, ptr, len); |
| self->in_markup = 0; |
| return 1; |
| } |
| |
| /* returns 0 on error, 1 on non-error termination, and 2 if it got a |
| string (or something to be expanded) */ |
| static int |
| MarkupIterator_next(MarkupIterator *self, int *is_markup, SubString *literal, |
| SubString *field_name, SubString *format_spec, |
| STRINGLIB_CHAR *conversion, |
| int *format_spec_needs_expanding) |
| { |
| int at_end; |
| STRINGLIB_CHAR c = 0; |
| STRINGLIB_CHAR *start; |
| int count; |
| Py_ssize_t len; |
| |
| *format_spec_needs_expanding = 0; |
| |
| /* no more input, end of iterator */ |
| if (self->str.ptr >= self->str.end) |
| return 1; |
| |
| *is_markup = self->in_markup; |
| start = self->str.ptr; |
| |
| if (self->in_markup) { |
| |
| /* prepare for next iteration */ |
| self->in_markup = 0; |
| |
| /* this is markup, find the end of the string by counting nested |
| braces. note that this prohibits escaped braces, so that |
| format_specs cannot have braces in them. */ |
| count = 1; |
| |
| /* we know we can't have a zero length string, so don't worry |
| about that case */ |
| while (self->str.ptr < self->str.end) { |
| switch (c = *(self->str.ptr++)) { |
| case '{': |
| /* the format spec needs to be recursively expanded. |
| this is an optimization, and not strictly needed */ |
| *format_spec_needs_expanding = 1; |
| count++; |
| break; |
| case '}': |
| count--; |
| if (count <= 0) { |
| /* we're done. parse and get out */ |
| literal->ptr = start; |
| literal->end = self->str.ptr-1; |
| |
| if (parse_field(literal, field_name, format_spec, |
| conversion) == 0) |
| return 0; |
| |
| /* success */ |
| return 2; |
| } |
| break; |
| } |
| } |
| /* end of string while searching for matching '}' */ |
| PyErr_SetString(PyExc_ValueError, "unmatched '{' in format"); |
| return 0; |
| |
| } else { |
| /* literal text, read until the end of string, an escaped { or }, |
| or an unescaped { */ |
| while (self->str.ptr < self->str.end) { |
| switch (c = *(self->str.ptr++)) { |
| case '{': |
| case '}': |
| self->in_markup = 1; |
| break; |
| default: |
| continue; |
| } |
| break; |
| } |
| |
| at_end = self->str.ptr >= self->str.end; |
| len = self->str.ptr - start; |
| |
| if ((c == '}') && (at_end || (c != *self->str.ptr))) |
| return (int)SetError("Single } encountered"); |
| if (at_end && c == '{') |
| return (int)SetError("Single { encountered"); |
| if (!at_end) { |
| if (c == *self->str.ptr) { |
| /* escaped } or {, skip it in the input */ |
| self->str.ptr++; |
| self->in_markup = 0; |
| } else |
| len--; |
| } |
| |
| /* this is just plain text, return it */ |
| literal->ptr = start; |
| literal->end = start + len; |
| return 2; |
| } |
| } |
| |
| |
| /* do the !r or !s conversion on obj */ |
| static PyObject * |
| do_conversion(PyObject *obj, STRINGLIB_CHAR conversion) |
| { |
| /* XXX in pre-3.0, do we need to convert this to unicode, since it |
| might have returned a string? */ |
| switch (conversion) { |
| case 'r': |
| return PyObject_Repr(obj); |
| case 's': |
| return PyObject_Unicode(obj); |
| default: |
| PyErr_Format(PyExc_ValueError, |
| "Unknown converion specifier %c", |
| conversion); |
| return NULL; |
| } |
| } |
| |
| /* given: |
| |
| {field_name!conversion:format_spec} |
| |
| compute the result and write it to output. |
| format_spec_needs_expanding is an optimization. if it's false, |
| just output the string directly, otherwise recursively expand the |
| format_spec string. */ |
| |
| static int |
| output_markup(SubString *field_name, SubString *format_spec, |
| int format_spec_needs_expanding, STRINGLIB_CHAR conversion, |
| OutputString *output, PyObject *args, PyObject *kwargs, |
| int *recursion_level) |
| { |
| PyObject *tmp = NULL; |
| PyObject *fieldobj = NULL; |
| SubString expanded_format_spec; |
| SubString *actual_format_spec; |
| int result = 0; |
| |
| /* convert field_name to an object */ |
| fieldobj = get_field_object(field_name, args, kwargs); |
| if (fieldobj == NULL) |
| goto done; |
| |
| if (conversion != '\0') { |
| tmp = do_conversion(fieldobj, conversion); |
| if (tmp == NULL) |
| goto done; |
| |
| /* do the assignment, transferring ownership: fieldobj = tmp */ |
| Py_DECREF(fieldobj); |
| fieldobj = tmp; |
| tmp = NULL; |
| } |
| |
| /* if needed, recurively compute the format_spec */ |
| if (format_spec_needs_expanding) { |
| tmp = build_string(format_spec, args, kwargs, recursion_level); |
| if (tmp == NULL) |
| goto done; |
| |
| /* note that in the case we're expanding the format string, |
| tmp must be kept around until after the call to |
| render_field. */ |
| SubString_init(&expanded_format_spec, |
| STRINGLIB_STR(tmp), STRINGLIB_LEN(tmp)); |
| actual_format_spec = &expanded_format_spec; |
| } else |
| actual_format_spec = format_spec; |
| |
| if (render_field(fieldobj, actual_format_spec, output) == 0) |
| goto done; |
| |
| result = 1; |
| |
| done: |
| Py_XDECREF(fieldobj); |
| Py_XDECREF(tmp); |
| |
| return result; |
| } |
| |
| /* |
| do_markup is the top-level loop for the format() function. It |
| searches through the format string for escapes to markup codes, and |
| calls other functions to move non-markup text to the output, |
| and to perform the markup to the output. |
| */ |
| static int |
| do_markup(SubString *input, PyObject *args, PyObject *kwargs, |
| OutputString *output, int *recursion_level) |
| { |
| MarkupIterator iter; |
| int is_markup; |
| int format_spec_needs_expanding; |
| int result; |
| SubString str; |
| SubString field_name; |
| SubString format_spec; |
| STRINGLIB_CHAR conversion; |
| |
| MarkupIterator_init(&iter, input->ptr, input->end - input->ptr); |
| while ((result = MarkupIterator_next(&iter, &is_markup, &str, &field_name, |
| &format_spec, &conversion, |
| &format_spec_needs_expanding)) == 2) { |
| if (is_markup) { |
| if (!output_markup(&field_name, &format_spec, |
| format_spec_needs_expanding, conversion, output, |
| args, kwargs, recursion_level)) |
| return 0; |
| } else { |
| if (!output_data(output, str.ptr, str.end-str.ptr)) |
| return 0; |
| } |
| } |
| return result; |
| } |
| |
| |
| /* |
| build_string allocates the output string and then |
| calls do_markup to do the heavy lifting. |
| */ |
| static PyObject * |
| build_string(SubString *input, PyObject *args, PyObject *kwargs, |
| int *recursion_level) |
| { |
| OutputString output; |
| PyObject *result = NULL; |
| Py_ssize_t count; |
| |
| output.obj = NULL; /* needed so cleanup code always works */ |
| |
| /* check the recursion level */ |
| (*recursion_level)--; |
| if (*recursion_level < 0) { |
| PyErr_SetString(PyExc_ValueError, |
| "Max string recursion exceeded"); |
| goto done; |
| } |
| |
| /* initial size is the length of the format string, plus the size |
| increment. seems like a reasonable default */ |
| if (!output_initialize(&output, |
| input->end - input->ptr + |
| INITIAL_SIZE_INCREMENT)) |
| goto done; |
| |
| if (!do_markup(input, args, kwargs, &output, recursion_level)) { |
| goto done; |
| } |
| |
| count = output.ptr - STRINGLIB_STR(output.obj); |
| if (STRINGLIB_RESIZE(&output.obj, count) < 0) { |
| goto done; |
| } |
| |
| /* transfer ownership to result */ |
| result = output.obj; |
| output.obj = NULL; |
| |
| done: |
| (*recursion_level)++; |
| Py_XDECREF(output.obj); |
| return result; |
| } |
| |
| /************************************************************************/ |
| /*********** main routine ***********************************************/ |
| /************************************************************************/ |
| |
| /* this is the main entry point */ |
| static PyObject * |
| do_string_format(PyObject *self, PyObject *args, PyObject *kwargs) |
| { |
| SubString input; |
| |
| /* PEP 3101 says only 2 levels, so that |
| "{0:{1}}".format('abc', 's') # works |
| "{0:{1:{2}}}".format('abc', 's', '') # fails |
| */ |
| int recursion_level = 2; |
| |
| SubString_init(&input, STRINGLIB_STR(self), STRINGLIB_LEN(self)); |
| return build_string(&input, args, kwargs, &recursion_level); |
| } |