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2877 lines
64 KiB
C
2877 lines
64 KiB
C
/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI or Corporation for National Research Initiatives or
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CNRI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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While CWI is the initial source for this software, a modified version
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is made available by the Corporation for National Research Initiatives
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(CNRI) at the Internet address ftp://ftp.python.org.
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STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* String object implementation */
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#include "Python.h"
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#include "mymath.h"
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#include <ctype.h>
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#ifdef COUNT_ALLOCS
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int null_strings, one_strings;
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#endif
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#ifdef HAVE_LIMITS_H
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#include <limits.h>
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#else
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#ifndef UCHAR_MAX
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#define UCHAR_MAX 255
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#endif
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#endif
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static PyStringObject *characters[UCHAR_MAX + 1];
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#ifndef DONT_SHARE_SHORT_STRINGS
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static PyStringObject *nullstring;
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#endif
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/*
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Newsizedstringobject() and newstringobject() try in certain cases
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to share string objects. When the size of the string is zero,
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these routines always return a pointer to the same string object;
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when the size is one, they return a pointer to an already existing
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object if the contents of the string is known. For
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newstringobject() this is always the case, for
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newsizedstringobject() this is the case when the first argument in
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not NULL.
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A common practice to allocate a string and then fill it in or
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change it must be done carefully. It is only allowed to change the
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contents of the string if the obect was gotten from
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newsizedstringobject() with a NULL first argument, because in the
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future these routines may try to do even more sharing of objects.
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*/
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PyObject *
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PyString_FromStringAndSize(str, size)
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const char *str;
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int size;
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{
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register PyStringObject *op;
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#ifndef DONT_SHARE_SHORT_STRINGS
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if (size == 0 && (op = nullstring) != NULL) {
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#ifdef COUNT_ALLOCS
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null_strings++;
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#endif
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Py_INCREF(op);
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return (PyObject *)op;
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}
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if (size == 1 && str != NULL &&
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(op = characters[*str & UCHAR_MAX]) != NULL)
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{
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#ifdef COUNT_ALLOCS
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one_strings++;
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#endif
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Py_INCREF(op);
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return (PyObject *)op;
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}
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#endif /* DONT_SHARE_SHORT_STRINGS */
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/* PyObject_NewVar is inlined */
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op = (PyStringObject *)
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PyObject_MALLOC(sizeof(PyStringObject) + size * sizeof(char));
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if (op == NULL)
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return PyErr_NoMemory();
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PyObject_INIT_VAR(op, &PyString_Type, size);
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#ifdef CACHE_HASH
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op->ob_shash = -1;
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#endif
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#ifdef INTERN_STRINGS
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op->ob_sinterned = NULL;
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#endif
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if (str != NULL)
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memcpy(op->ob_sval, str, size);
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op->ob_sval[size] = '\0';
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#ifndef DONT_SHARE_SHORT_STRINGS
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if (size == 0) {
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nullstring = op;
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Py_INCREF(op);
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} else if (size == 1 && str != NULL) {
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characters[*str & UCHAR_MAX] = op;
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Py_INCREF(op);
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}
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#endif
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return (PyObject *) op;
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}
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PyObject *
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PyString_FromString(str)
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const char *str;
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{
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register unsigned int size = strlen(str);
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register PyStringObject *op;
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#ifndef DONT_SHARE_SHORT_STRINGS
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if (size == 0 && (op = nullstring) != NULL) {
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#ifdef COUNT_ALLOCS
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null_strings++;
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#endif
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Py_INCREF(op);
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return (PyObject *)op;
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}
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if (size == 1 && (op = characters[*str & UCHAR_MAX]) != NULL) {
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#ifdef COUNT_ALLOCS
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one_strings++;
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#endif
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Py_INCREF(op);
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return (PyObject *)op;
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}
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#endif /* DONT_SHARE_SHORT_STRINGS */
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/* PyObject_NewVar is inlined */
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op = (PyStringObject *)
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PyObject_MALLOC(sizeof(PyStringObject) + size * sizeof(char));
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if (op == NULL)
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return PyErr_NoMemory();
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PyObject_INIT_VAR(op, &PyString_Type, size);
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#ifdef CACHE_HASH
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op->ob_shash = -1;
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#endif
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#ifdef INTERN_STRINGS
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op->ob_sinterned = NULL;
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#endif
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strcpy(op->ob_sval, str);
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#ifndef DONT_SHARE_SHORT_STRINGS
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if (size == 0) {
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nullstring = op;
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Py_INCREF(op);
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} else if (size == 1) {
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characters[*str & UCHAR_MAX] = op;
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Py_INCREF(op);
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}
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#endif
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return (PyObject *) op;
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}
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static void
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string_dealloc(op)
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PyObject *op;
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{
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PyObject_DEL(op);
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}
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int
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PyString_Size(op)
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register PyObject *op;
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{
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if (!PyString_Check(op)) {
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PyErr_BadInternalCall();
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return -1;
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}
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return ((PyStringObject *)op) -> ob_size;
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}
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/*const*/ char *
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PyString_AsString(op)
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register PyObject *op;
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{
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if (!PyString_Check(op)) {
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PyErr_BadInternalCall();
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return NULL;
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}
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return ((PyStringObject *)op) -> ob_sval;
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}
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/* Methods */
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static int
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string_print(op, fp, flags)
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PyStringObject *op;
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FILE *fp;
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int flags;
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{
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int i;
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char c;
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int quote;
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/* XXX Ought to check for interrupts when writing long strings */
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if (flags & Py_PRINT_RAW) {
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fwrite(op->ob_sval, 1, (int) op->ob_size, fp);
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return 0;
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}
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/* figure out which quote to use; single is prefered */
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quote = '\'';
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if (strchr(op->ob_sval, '\'') && !strchr(op->ob_sval, '"'))
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quote = '"';
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fputc(quote, fp);
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for (i = 0; i < op->ob_size; i++) {
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c = op->ob_sval[i];
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if (c == quote || c == '\\')
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fprintf(fp, "\\%c", c);
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else if (c < ' ' || c >= 0177)
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fprintf(fp, "\\%03o", c & 0377);
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else
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fputc(c, fp);
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}
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fputc(quote, fp);
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return 0;
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}
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static PyObject *
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string_repr(op)
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register PyStringObject *op;
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{
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/* XXX overflow? */
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int newsize = 2 + 4 * op->ob_size * sizeof(char);
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PyObject *v = PyString_FromStringAndSize((char *)NULL, newsize);
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if (v == NULL) {
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return NULL;
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}
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else {
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register int i;
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register char c;
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||
register char *p;
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int quote;
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/* figure out which quote to use; single is prefered */
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quote = '\'';
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if (strchr(op->ob_sval, '\'') && !strchr(op->ob_sval, '"'))
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quote = '"';
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p = ((PyStringObject *)v)->ob_sval;
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*p++ = quote;
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for (i = 0; i < op->ob_size; i++) {
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c = op->ob_sval[i];
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if (c == quote || c == '\\')
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*p++ = '\\', *p++ = c;
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else if (c < ' ' || c >= 0177) {
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sprintf(p, "\\%03o", c & 0377);
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while (*p != '\0')
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p++;
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}
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else
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*p++ = c;
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||
}
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||
*p++ = quote;
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||
*p = '\0';
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_PyString_Resize(
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&v, (int) (p - ((PyStringObject *)v)->ob_sval));
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return v;
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||
}
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||
}
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||
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static int
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string_length(a)
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PyStringObject *a;
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{
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return a->ob_size;
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}
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static PyObject *
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string_concat(a, bb)
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register PyStringObject *a;
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||
register PyObject *bb;
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{
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register unsigned int size;
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||
register PyStringObject *op;
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if (!PyString_Check(bb)) {
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||
if (PyUnicode_Check(bb))
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||
return PyUnicode_Concat((PyObject *)a, bb);
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PyErr_Format(PyExc_TypeError,
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"cannot add type \"%.200s\" to string",
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bb->ob_type->tp_name);
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return NULL;
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||
}
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||
#define b ((PyStringObject *)bb)
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||
/* Optimize cases with empty left or right operand */
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||
if (a->ob_size == 0) {
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Py_INCREF(bb);
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return bb;
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||
}
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if (b->ob_size == 0) {
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||
Py_INCREF(a);
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||
return (PyObject *)a;
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||
}
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||
size = a->ob_size + b->ob_size;
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||
/* PyObject_NewVar is inlined */
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||
op = (PyStringObject *)
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||
PyObject_MALLOC(sizeof(PyStringObject) + size * sizeof(char));
|
||
if (op == NULL)
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||
return PyErr_NoMemory();
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||
PyObject_INIT_VAR(op, &PyString_Type, size);
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||
#ifdef CACHE_HASH
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||
op->ob_shash = -1;
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||
#endif
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||
#ifdef INTERN_STRINGS
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||
op->ob_sinterned = NULL;
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||
#endif
|
||
memcpy(op->ob_sval, a->ob_sval, (int) a->ob_size);
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||
memcpy(op->ob_sval + a->ob_size, b->ob_sval, (int) b->ob_size);
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||
op->ob_sval[size] = '\0';
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return (PyObject *) op;
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||
#undef b
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||
}
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static PyObject *
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string_repeat(a, n)
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register PyStringObject *a;
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||
register int n;
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||
{
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||
register int i;
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||
register int size;
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||
register PyStringObject *op;
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||
if (n < 0)
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||
n = 0;
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||
size = a->ob_size * n;
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||
if (size == a->ob_size) {
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||
Py_INCREF(a);
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||
return (PyObject *)a;
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||
}
|
||
/* PyObject_NewVar is inlined */
|
||
op = (PyStringObject *)
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||
PyObject_MALLOC(sizeof(PyStringObject) + size * sizeof(char));
|
||
if (op == NULL)
|
||
return PyErr_NoMemory();
|
||
PyObject_INIT_VAR(op, &PyString_Type, size);
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||
#ifdef CACHE_HASH
|
||
op->ob_shash = -1;
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||
#endif
|
||
#ifdef INTERN_STRINGS
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||
op->ob_sinterned = NULL;
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||
#endif
|
||
for (i = 0; i < size; i += a->ob_size)
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||
memcpy(op->ob_sval+i, a->ob_sval, (int) a->ob_size);
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||
op->ob_sval[size] = '\0';
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||
return (PyObject *) op;
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||
}
|
||
|
||
/* String slice a[i:j] consists of characters a[i] ... a[j-1] */
|
||
|
||
static PyObject *
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||
string_slice(a, i, j)
|
||
register PyStringObject *a;
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||
register int i, j; /* May be negative! */
|
||
{
|
||
if (i < 0)
|
||
i = 0;
|
||
if (j < 0)
|
||
j = 0; /* Avoid signed/unsigned bug in next line */
|
||
if (j > a->ob_size)
|
||
j = a->ob_size;
|
||
if (i == 0 && j == a->ob_size) { /* It's the same as a */
|
||
Py_INCREF(a);
|
||
return (PyObject *)a;
|
||
}
|
||
if (j < i)
|
||
j = i;
|
||
return PyString_FromStringAndSize(a->ob_sval + i, (int) (j-i));
|
||
}
|
||
|
||
static int
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||
string_contains(a, el)
|
||
PyObject *a, *el;
|
||
{
|
||
register char *s, *end;
|
||
register char c;
|
||
if (PyUnicode_Check(el))
|
||
return PyUnicode_Contains(a, el);
|
||
if (!PyString_Check(el) || PyString_Size(el) != 1) {
|
||
PyErr_SetString(PyExc_TypeError,
|
||
"'in <string>' requires character as left operand");
|
||
return -1;
|
||
}
|
||
c = PyString_AsString(el)[0];
|
||
s = PyString_AsString(a);
|
||
end = s + PyString_Size(a);
|
||
while (s < end) {
|
||
if (c == *s++)
|
||
return 1;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
static PyObject *
|
||
string_item(a, i)
|
||
PyStringObject *a;
|
||
register int i;
|
||
{
|
||
int c;
|
||
PyObject *v;
|
||
if (i < 0 || i >= a->ob_size) {
|
||
PyErr_SetString(PyExc_IndexError, "string index out of range");
|
||
return NULL;
|
||
}
|
||
c = a->ob_sval[i] & UCHAR_MAX;
|
||
v = (PyObject *) characters[c];
|
||
#ifdef COUNT_ALLOCS
|
||
if (v != NULL)
|
||
one_strings++;
|
||
#endif
|
||
if (v == NULL) {
|
||
v = PyString_FromStringAndSize((char *)NULL, 1);
|
||
if (v == NULL)
|
||
return NULL;
|
||
characters[c] = (PyStringObject *) v;
|
||
((PyStringObject *)v)->ob_sval[0] = c;
|
||
}
|
||
Py_INCREF(v);
|
||
return v;
|
||
}
|
||
|
||
static int
|
||
string_compare(a, b)
|
||
PyStringObject *a, *b;
|
||
{
|
||
int len_a = a->ob_size, len_b = b->ob_size;
|
||
int min_len = (len_a < len_b) ? len_a : len_b;
|
||
int cmp;
|
||
if (min_len > 0) {
|
||
cmp = Py_CHARMASK(*a->ob_sval) - Py_CHARMASK(*b->ob_sval);
|
||
if (cmp == 0)
|
||
cmp = memcmp(a->ob_sval, b->ob_sval, min_len);
|
||
if (cmp != 0)
|
||
return cmp;
|
||
}
|
||
return (len_a < len_b) ? -1 : (len_a > len_b) ? 1 : 0;
|
||
}
|
||
|
||
static long
|
||
string_hash(a)
|
||
PyStringObject *a;
|
||
{
|
||
register int len;
|
||
register unsigned char *p;
|
||
register long x;
|
||
|
||
#ifdef CACHE_HASH
|
||
if (a->ob_shash != -1)
|
||
return a->ob_shash;
|
||
#ifdef INTERN_STRINGS
|
||
if (a->ob_sinterned != NULL)
|
||
return (a->ob_shash =
|
||
((PyStringObject *)(a->ob_sinterned))->ob_shash);
|
||
#endif
|
||
#endif
|
||
len = a->ob_size;
|
||
p = (unsigned char *) a->ob_sval;
|
||
x = *p << 7;
|
||
while (--len >= 0)
|
||
x = (1000003*x) ^ *p++;
|
||
x ^= a->ob_size;
|
||
if (x == -1)
|
||
x = -2;
|
||
#ifdef CACHE_HASH
|
||
a->ob_shash = x;
|
||
#endif
|
||
return x;
|
||
}
|
||
|
||
static int
|
||
string_buffer_getreadbuf(self, index, ptr)
|
||
PyStringObject *self;
|
||
int index;
|
||
const void **ptr;
|
||
{
|
||
if ( index != 0 ) {
|
||
PyErr_SetString(PyExc_SystemError,
|
||
"accessing non-existent string segment");
|
||
return -1;
|
||
}
|
||
*ptr = (void *)self->ob_sval;
|
||
return self->ob_size;
|
||
}
|
||
|
||
static int
|
||
string_buffer_getwritebuf(self, index, ptr)
|
||
PyStringObject *self;
|
||
int index;
|
||
const void **ptr;
|
||
{
|
||
PyErr_SetString(PyExc_TypeError,
|
||
"Cannot use string as modifiable buffer");
|
||
return -1;
|
||
}
|
||
|
||
static int
|
||
string_buffer_getsegcount(self, lenp)
|
||
PyStringObject *self;
|
||
int *lenp;
|
||
{
|
||
if ( lenp )
|
||
*lenp = self->ob_size;
|
||
return 1;
|
||
}
|
||
|
||
static int
|
||
string_buffer_getcharbuf(self, index, ptr)
|
||
PyStringObject *self;
|
||
int index;
|
||
const char **ptr;
|
||
{
|
||
if ( index != 0 ) {
|
||
PyErr_SetString(PyExc_SystemError,
|
||
"accessing non-existent string segment");
|
||
return -1;
|
||
}
|
||
*ptr = self->ob_sval;
|
||
return self->ob_size;
|
||
}
|
||
|
||
static PySequenceMethods string_as_sequence = {
|
||
(inquiry)string_length, /*sq_length*/
|
||
(binaryfunc)string_concat, /*sq_concat*/
|
||
(intargfunc)string_repeat, /*sq_repeat*/
|
||
(intargfunc)string_item, /*sq_item*/
|
||
(intintargfunc)string_slice, /*sq_slice*/
|
||
0, /*sq_ass_item*/
|
||
0, /*sq_ass_slice*/
|
||
(objobjproc)string_contains /*sq_contains*/
|
||
};
|
||
|
||
static PyBufferProcs string_as_buffer = {
|
||
(getreadbufferproc)string_buffer_getreadbuf,
|
||
(getwritebufferproc)string_buffer_getwritebuf,
|
||
(getsegcountproc)string_buffer_getsegcount,
|
||
(getcharbufferproc)string_buffer_getcharbuf,
|
||
};
|
||
|
||
|
||
|
||
#define LEFTSTRIP 0
|
||
#define RIGHTSTRIP 1
|
||
#define BOTHSTRIP 2
|
||
|
||
|
||
static PyObject *
|
||
split_whitespace(s, len, maxsplit)
|
||
char *s;
|
||
int len;
|
||
int maxsplit;
|
||
{
|
||
int i, j, err;
|
||
PyObject* item;
|
||
PyObject *list = PyList_New(0);
|
||
|
||
if (list == NULL)
|
||
return NULL;
|
||
|
||
for (i = j = 0; i < len; ) {
|
||
while (i < len && isspace(Py_CHARMASK(s[i])))
|
||
i++;
|
||
j = i;
|
||
while (i < len && !isspace(Py_CHARMASK(s[i])))
|
||
i++;
|
||
if (j < i) {
|
||
if (maxsplit-- <= 0)
|
||
break;
|
||
item = PyString_FromStringAndSize(s+j, (int)(i-j));
|
||
if (item == NULL)
|
||
goto finally;
|
||
err = PyList_Append(list, item);
|
||
Py_DECREF(item);
|
||
if (err < 0)
|
||
goto finally;
|
||
while (i < len && isspace(Py_CHARMASK(s[i])))
|
||
i++;
|
||
j = i;
|
||
}
|
||
}
|
||
if (j < len) {
|
||
item = PyString_FromStringAndSize(s+j, (int)(len - j));
|
||
if (item == NULL)
|
||
goto finally;
|
||
err = PyList_Append(list, item);
|
||
Py_DECREF(item);
|
||
if (err < 0)
|
||
goto finally;
|
||
}
|
||
return list;
|
||
finally:
|
||
Py_DECREF(list);
|
||
return NULL;
|
||
}
|
||
|
||
|
||
static char split__doc__[] =
|
||
"S.split([sep [,maxsplit]]) -> list of strings\n\
|
||
\n\
|
||
Return a list of the words in the string S, using sep as the\n\
|
||
delimiter string. If maxsplit is given, at most maxsplit\n\
|
||
splits are done. If sep is not specified, any whitespace string\n\
|
||
is a separator.";
|
||
|
||
static PyObject *
|
||
string_split(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
int len = PyString_GET_SIZE(self), n, i, j, err;
|
||
int maxsplit = -1;
|
||
const char *s = PyString_AS_STRING(self), *sub;
|
||
PyObject *list, *item, *subobj = Py_None;
|
||
|
||
if (!PyArg_ParseTuple(args, "|Oi:split", &subobj, &maxsplit))
|
||
return NULL;
|
||
if (maxsplit < 0)
|
||
maxsplit = INT_MAX;
|
||
if (subobj == Py_None)
|
||
return split_whitespace(s, len, maxsplit);
|
||
if (PyString_Check(subobj)) {
|
||
sub = PyString_AS_STRING(subobj);
|
||
n = PyString_GET_SIZE(subobj);
|
||
}
|
||
else if (PyUnicode_Check(subobj))
|
||
return PyUnicode_Split((PyObject *)self, subobj, maxsplit);
|
||
else if (PyObject_AsCharBuffer(subobj, &sub, &n))
|
||
return NULL;
|
||
if (n == 0) {
|
||
PyErr_SetString(PyExc_ValueError, "empty separator");
|
||
return NULL;
|
||
}
|
||
|
||
list = PyList_New(0);
|
||
if (list == NULL)
|
||
return NULL;
|
||
|
||
i = j = 0;
|
||
while (i+n <= len) {
|
||
if (s[i] == sub[0] && memcmp(s+i, sub, n) == 0) {
|
||
if (maxsplit-- <= 0)
|
||
break;
|
||
item = PyString_FromStringAndSize(s+j, (int)(i-j));
|
||
if (item == NULL)
|
||
goto fail;
|
||
err = PyList_Append(list, item);
|
||
Py_DECREF(item);
|
||
if (err < 0)
|
||
goto fail;
|
||
i = j = i + n;
|
||
}
|
||
else
|
||
i++;
|
||
}
|
||
item = PyString_FromStringAndSize(s+j, (int)(len-j));
|
||
if (item == NULL)
|
||
goto fail;
|
||
err = PyList_Append(list, item);
|
||
Py_DECREF(item);
|
||
if (err < 0)
|
||
goto fail;
|
||
|
||
return list;
|
||
|
||
fail:
|
||
Py_DECREF(list);
|
||
return NULL;
|
||
}
|
||
|
||
|
||
static char join__doc__[] =
|
||
"S.join(sequence) -> string\n\
|
||
\n\
|
||
Return a string which is the concatenation of the strings in the\n\
|
||
sequence. The separator between elements is S.";
|
||
|
||
static PyObject *
|
||
string_join(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
char *sep = PyString_AS_STRING(self);
|
||
int seplen = PyString_GET_SIZE(self);
|
||
PyObject *res = NULL;
|
||
int reslen = 0;
|
||
char *p;
|
||
int seqlen = 0;
|
||
int sz = 100;
|
||
int i, slen;
|
||
PyObject *seq;
|
||
|
||
if (!PyArg_ParseTuple(args, "O:join", &seq))
|
||
return NULL;
|
||
|
||
seqlen = PySequence_Length(seq);
|
||
if (seqlen < 0 && PyErr_Occurred())
|
||
return NULL;
|
||
|
||
if (seqlen == 1) {
|
||
/* Optimization if there's only one item */
|
||
PyObject *item = PySequence_GetItem(seq, 0);
|
||
if (item == NULL)
|
||
return NULL;
|
||
if (!PyString_Check(item) &&
|
||
!PyUnicode_Check(item)) {
|
||
PyErr_SetString(PyExc_TypeError,
|
||
"first argument must be sequence of strings");
|
||
Py_DECREF(item);
|
||
return NULL;
|
||
}
|
||
return item;
|
||
}
|
||
if (!(res = PyString_FromStringAndSize((char*)NULL, sz)))
|
||
return NULL;
|
||
p = PyString_AsString(res);
|
||
|
||
/* optimize for lists. all others (tuples and arbitrary sequences)
|
||
* just use the abstract interface.
|
||
*/
|
||
if (PyList_Check(seq)) {
|
||
for (i = 0; i < seqlen; i++) {
|
||
PyObject *item = PyList_GET_ITEM(seq, i);
|
||
if (!PyString_Check(item)){
|
||
if (PyUnicode_Check(item)) {
|
||
Py_DECREF(res);
|
||
return PyUnicode_Join(
|
||
(PyObject *)self,
|
||
seq);
|
||
}
|
||
PyErr_Format(PyExc_TypeError,
|
||
"sequence item %i not a string",
|
||
i);
|
||
goto finally;
|
||
}
|
||
slen = PyString_GET_SIZE(item);
|
||
while (reslen + slen + seplen >= sz) {
|
||
if (_PyString_Resize(&res, sz*2))
|
||
goto finally;
|
||
sz *= 2;
|
||
p = PyString_AsString(res) + reslen;
|
||
}
|
||
if (i > 0) {
|
||
memcpy(p, sep, seplen);
|
||
p += seplen;
|
||
reslen += seplen;
|
||
}
|
||
memcpy(p, PyString_AS_STRING(item), slen);
|
||
p += slen;
|
||
reslen += slen;
|
||
}
|
||
}
|
||
else {
|
||
for (i = 0; i < seqlen; i++) {
|
||
PyObject *item = PySequence_GetItem(seq, i);
|
||
if (!item)
|
||
goto finally;
|
||
if (!PyString_Check(item)){
|
||
if (PyUnicode_Check(item)) {
|
||
Py_DECREF(res);
|
||
Py_DECREF(item);
|
||
return PyUnicode_Join(
|
||
(PyObject *)self,
|
||
seq);
|
||
}
|
||
Py_DECREF(item);
|
||
PyErr_Format(PyExc_TypeError,
|
||
"sequence item %i not a string",
|
||
i);
|
||
goto finally;
|
||
}
|
||
slen = PyString_GET_SIZE(item);
|
||
while (reslen + slen + seplen >= sz) {
|
||
if (_PyString_Resize(&res, sz*2)) {
|
||
Py_DECREF(item);
|
||
goto finally;
|
||
}
|
||
sz *= 2;
|
||
p = PyString_AsString(res) + reslen;
|
||
}
|
||
if (i > 0) {
|
||
memcpy(p, sep, seplen);
|
||
p += seplen;
|
||
reslen += seplen;
|
||
}
|
||
memcpy(p, PyString_AS_STRING(item), slen);
|
||
Py_DECREF(item);
|
||
p += slen;
|
||
reslen += slen;
|
||
}
|
||
}
|
||
if (_PyString_Resize(&res, reslen))
|
||
goto finally;
|
||
return res;
|
||
|
||
finally:
|
||
Py_DECREF(res);
|
||
return NULL;
|
||
}
|
||
|
||
|
||
|
||
static long
|
||
string_find_internal(self, args, dir)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
int dir;
|
||
{
|
||
const char *s = PyString_AS_STRING(self), *sub;
|
||
int len = PyString_GET_SIZE(self);
|
||
int n, i = 0, last = INT_MAX;
|
||
PyObject *subobj;
|
||
|
||
if (!PyArg_ParseTuple(args, "O|O&O&:find/rfind/index/rindex",
|
||
&subobj, _PyEval_SliceIndex, &i, _PyEval_SliceIndex, &last))
|
||
return -2;
|
||
if (PyString_Check(subobj)) {
|
||
sub = PyString_AS_STRING(subobj);
|
||
n = PyString_GET_SIZE(subobj);
|
||
}
|
||
else if (PyUnicode_Check(subobj))
|
||
return PyUnicode_Find((PyObject *)self, subobj, i, last, 1);
|
||
else if (PyObject_AsCharBuffer(subobj, &sub, &n))
|
||
return -2;
|
||
|
||
if (last > len)
|
||
last = len;
|
||
if (last < 0)
|
||
last += len;
|
||
if (last < 0)
|
||
last = 0;
|
||
if (i < 0)
|
||
i += len;
|
||
if (i < 0)
|
||
i = 0;
|
||
|
||
if (dir > 0) {
|
||
if (n == 0 && i <= last)
|
||
return (long)i;
|
||
last -= n;
|
||
for (; i <= last; ++i)
|
||
if (s[i] == sub[0] && memcmp(&s[i], sub, n) == 0)
|
||
return (long)i;
|
||
}
|
||
else {
|
||
int j;
|
||
|
||
if (n == 0 && i <= last)
|
||
return (long)last;
|
||
for (j = last-n; j >= i; --j)
|
||
if (s[j] == sub[0] && memcmp(&s[j], sub, n) == 0)
|
||
return (long)j;
|
||
}
|
||
|
||
return -1;
|
||
}
|
||
|
||
|
||
static char find__doc__[] =
|
||
"S.find(sub [,start [,end]]) -> int\n\
|
||
\n\
|
||
Return the lowest index in S where substring sub is found,\n\
|
||
such that sub is contained within s[start,end]. Optional\n\
|
||
arguments start and end are interpreted as in slice notation.\n\
|
||
\n\
|
||
Return -1 on failure.";
|
||
|
||
static PyObject *
|
||
string_find(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
long result = string_find_internal(self, args, +1);
|
||
if (result == -2)
|
||
return NULL;
|
||
return PyInt_FromLong(result);
|
||
}
|
||
|
||
|
||
static char index__doc__[] =
|
||
"S.index(sub [,start [,end]]) -> int\n\
|
||
\n\
|
||
Like S.find() but raise ValueError when the substring is not found.";
|
||
|
||
static PyObject *
|
||
string_index(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
long result = string_find_internal(self, args, +1);
|
||
if (result == -2)
|
||
return NULL;
|
||
if (result == -1) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"substring not found in string.index");
|
||
return NULL;
|
||
}
|
||
return PyInt_FromLong(result);
|
||
}
|
||
|
||
|
||
static char rfind__doc__[] =
|
||
"S.rfind(sub [,start [,end]]) -> int\n\
|
||
\n\
|
||
Return the highest index in S where substring sub is found,\n\
|
||
such that sub is contained within s[start,end]. Optional\n\
|
||
arguments start and end are interpreted as in slice notation.\n\
|
||
\n\
|
||
Return -1 on failure.";
|
||
|
||
static PyObject *
|
||
string_rfind(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
long result = string_find_internal(self, args, -1);
|
||
if (result == -2)
|
||
return NULL;
|
||
return PyInt_FromLong(result);
|
||
}
|
||
|
||
|
||
static char rindex__doc__[] =
|
||
"S.rindex(sub [,start [,end]]) -> int\n\
|
||
\n\
|
||
Like S.rfind() but raise ValueError when the substring is not found.";
|
||
|
||
static PyObject *
|
||
string_rindex(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
long result = string_find_internal(self, args, -1);
|
||
if (result == -2)
|
||
return NULL;
|
||
if (result == -1) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"substring not found in string.rindex");
|
||
return NULL;
|
||
}
|
||
return PyInt_FromLong(result);
|
||
}
|
||
|
||
|
||
static PyObject *
|
||
do_strip(self, args, striptype)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
int striptype;
|
||
{
|
||
char *s = PyString_AS_STRING(self);
|
||
int len = PyString_GET_SIZE(self), i, j;
|
||
|
||
if (!PyArg_ParseTuple(args, ":strip"))
|
||
return NULL;
|
||
|
||
i = 0;
|
||
if (striptype != RIGHTSTRIP) {
|
||
while (i < len && isspace(Py_CHARMASK(s[i]))) {
|
||
i++;
|
||
}
|
||
}
|
||
|
||
j = len;
|
||
if (striptype != LEFTSTRIP) {
|
||
do {
|
||
j--;
|
||
} while (j >= i && isspace(Py_CHARMASK(s[j])));
|
||
j++;
|
||
}
|
||
|
||
if (i == 0 && j == len) {
|
||
Py_INCREF(self);
|
||
return (PyObject*)self;
|
||
}
|
||
else
|
||
return PyString_FromStringAndSize(s+i, j-i);
|
||
}
|
||
|
||
|
||
static char strip__doc__[] =
|
||
"S.strip() -> string\n\
|
||
\n\
|
||
Return a copy of the string S with leading and trailing\n\
|
||
whitespace removed.";
|
||
|
||
static PyObject *
|
||
string_strip(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
return do_strip(self, args, BOTHSTRIP);
|
||
}
|
||
|
||
|
||
static char lstrip__doc__[] =
|
||
"S.lstrip() -> string\n\
|
||
\n\
|
||
Return a copy of the string S with leading whitespace removed.";
|
||
|
||
static PyObject *
|
||
string_lstrip(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
return do_strip(self, args, LEFTSTRIP);
|
||
}
|
||
|
||
|
||
static char rstrip__doc__[] =
|
||
"S.rstrip() -> string\n\
|
||
\n\
|
||
Return a copy of the string S with trailing whitespace removed.";
|
||
|
||
static PyObject *
|
||
string_rstrip(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
return do_strip(self, args, RIGHTSTRIP);
|
||
}
|
||
|
||
|
||
static char lower__doc__[] =
|
||
"S.lower() -> string\n\
|
||
\n\
|
||
Return a copy of the string S converted to lowercase.";
|
||
|
||
static PyObject *
|
||
string_lower(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
char *s = PyString_AS_STRING(self), *s_new;
|
||
int i, n = PyString_GET_SIZE(self);
|
||
PyObject *new;
|
||
|
||
if (!PyArg_ParseTuple(args, ":lower"))
|
||
return NULL;
|
||
new = PyString_FromStringAndSize(NULL, n);
|
||
if (new == NULL)
|
||
return NULL;
|
||
s_new = PyString_AsString(new);
|
||
for (i = 0; i < n; i++) {
|
||
int c = Py_CHARMASK(*s++);
|
||
if (isupper(c)) {
|
||
*s_new = tolower(c);
|
||
} else
|
||
*s_new = c;
|
||
s_new++;
|
||
}
|
||
return new;
|
||
}
|
||
|
||
|
||
static char upper__doc__[] =
|
||
"S.upper() -> string\n\
|
||
\n\
|
||
Return a copy of the string S converted to uppercase.";
|
||
|
||
static PyObject *
|
||
string_upper(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
char *s = PyString_AS_STRING(self), *s_new;
|
||
int i, n = PyString_GET_SIZE(self);
|
||
PyObject *new;
|
||
|
||
if (!PyArg_ParseTuple(args, ":upper"))
|
||
return NULL;
|
||
new = PyString_FromStringAndSize(NULL, n);
|
||
if (new == NULL)
|
||
return NULL;
|
||
s_new = PyString_AsString(new);
|
||
for (i = 0; i < n; i++) {
|
||
int c = Py_CHARMASK(*s++);
|
||
if (islower(c)) {
|
||
*s_new = toupper(c);
|
||
} else
|
||
*s_new = c;
|
||
s_new++;
|
||
}
|
||
return new;
|
||
}
|
||
|
||
|
||
static char title__doc__[] =
|
||
"S.title() -> string\n\
|
||
\n\
|
||
Return a titlecased version of S, i.e. words start with uppercase\n\
|
||
characters, all remaining cased characters have lowercase.";
|
||
|
||
static PyObject*
|
||
string_title(PyUnicodeObject *self, PyObject *args)
|
||
{
|
||
char *s = PyString_AS_STRING(self), *s_new;
|
||
int i, n = PyString_GET_SIZE(self);
|
||
int previous_is_cased = 0;
|
||
PyObject *new;
|
||
|
||
if (!PyArg_ParseTuple(args, ":title"))
|
||
return NULL;
|
||
new = PyString_FromStringAndSize(NULL, n);
|
||
if (new == NULL)
|
||
return NULL;
|
||
s_new = PyString_AsString(new);
|
||
for (i = 0; i < n; i++) {
|
||
int c = Py_CHARMASK(*s++);
|
||
if (islower(c)) {
|
||
if (!previous_is_cased)
|
||
c = toupper(c);
|
||
previous_is_cased = 1;
|
||
} else if (isupper(c)) {
|
||
if (previous_is_cased)
|
||
c = tolower(c);
|
||
previous_is_cased = 1;
|
||
} else
|
||
previous_is_cased = 0;
|
||
*s_new++ = c;
|
||
}
|
||
return new;
|
||
}
|
||
|
||
static char capitalize__doc__[] =
|
||
"S.capitalize() -> string\n\
|
||
\n\
|
||
Return a copy of the string S with only its first character\n\
|
||
capitalized.";
|
||
|
||
static PyObject *
|
||
string_capitalize(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
char *s = PyString_AS_STRING(self), *s_new;
|
||
int i, n = PyString_GET_SIZE(self);
|
||
PyObject *new;
|
||
|
||
if (!PyArg_ParseTuple(args, ":capitalize"))
|
||
return NULL;
|
||
new = PyString_FromStringAndSize(NULL, n);
|
||
if (new == NULL)
|
||
return NULL;
|
||
s_new = PyString_AsString(new);
|
||
if (0 < n) {
|
||
int c = Py_CHARMASK(*s++);
|
||
if (islower(c))
|
||
*s_new = toupper(c);
|
||
else
|
||
*s_new = c;
|
||
s_new++;
|
||
}
|
||
for (i = 1; i < n; i++) {
|
||
int c = Py_CHARMASK(*s++);
|
||
if (isupper(c))
|
||
*s_new = tolower(c);
|
||
else
|
||
*s_new = c;
|
||
s_new++;
|
||
}
|
||
return new;
|
||
}
|
||
|
||
|
||
static char count__doc__[] =
|
||
"S.count(sub[, start[, end]]) -> int\n\
|
||
\n\
|
||
Return the number of occurrences of substring sub in string\n\
|
||
S[start:end]. Optional arguments start and end are\n\
|
||
interpreted as in slice notation.";
|
||
|
||
static PyObject *
|
||
string_count(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
const char *s = PyString_AS_STRING(self), *sub;
|
||
int len = PyString_GET_SIZE(self), n;
|
||
int i = 0, last = INT_MAX;
|
||
int m, r;
|
||
PyObject *subobj;
|
||
|
||
if (!PyArg_ParseTuple(args, "O|O&O&:count", &subobj,
|
||
_PyEval_SliceIndex, &i, _PyEval_SliceIndex, &last))
|
||
return NULL;
|
||
|
||
if (PyString_Check(subobj)) {
|
||
sub = PyString_AS_STRING(subobj);
|
||
n = PyString_GET_SIZE(subobj);
|
||
}
|
||
else if (PyUnicode_Check(subobj))
|
||
return PyInt_FromLong(
|
||
PyUnicode_Count((PyObject *)self, subobj, i, last));
|
||
else if (PyObject_AsCharBuffer(subobj, &sub, &n))
|
||
return NULL;
|
||
|
||
if (last > len)
|
||
last = len;
|
||
if (last < 0)
|
||
last += len;
|
||
if (last < 0)
|
||
last = 0;
|
||
if (i < 0)
|
||
i += len;
|
||
if (i < 0)
|
||
i = 0;
|
||
m = last + 1 - n;
|
||
if (n == 0)
|
||
return PyInt_FromLong((long) (m-i));
|
||
|
||
r = 0;
|
||
while (i < m) {
|
||
if (!memcmp(s+i, sub, n)) {
|
||
r++;
|
||
i += n;
|
||
} else {
|
||
i++;
|
||
}
|
||
}
|
||
return PyInt_FromLong((long) r);
|
||
}
|
||
|
||
|
||
static char swapcase__doc__[] =
|
||
"S.swapcase() -> string\n\
|
||
\n\
|
||
Return a copy of the string S with uppercase characters\n\
|
||
converted to lowercase and vice versa.";
|
||
|
||
static PyObject *
|
||
string_swapcase(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
char *s = PyString_AS_STRING(self), *s_new;
|
||
int i, n = PyString_GET_SIZE(self);
|
||
PyObject *new;
|
||
|
||
if (!PyArg_ParseTuple(args, ":swapcase"))
|
||
return NULL;
|
||
new = PyString_FromStringAndSize(NULL, n);
|
||
if (new == NULL)
|
||
return NULL;
|
||
s_new = PyString_AsString(new);
|
||
for (i = 0; i < n; i++) {
|
||
int c = Py_CHARMASK(*s++);
|
||
if (islower(c)) {
|
||
*s_new = toupper(c);
|
||
}
|
||
else if (isupper(c)) {
|
||
*s_new = tolower(c);
|
||
}
|
||
else
|
||
*s_new = c;
|
||
s_new++;
|
||
}
|
||
return new;
|
||
}
|
||
|
||
|
||
static char translate__doc__[] =
|
||
"S.translate(table [,deletechars]) -> string\n\
|
||
\n\
|
||
Return a copy of the string S, where all characters occurring\n\
|
||
in the optional argument deletechars are removed, and the\n\
|
||
remaining characters have been mapped through the given\n\
|
||
translation table, which must be a string of length 256.";
|
||
|
||
static PyObject *
|
||
string_translate(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
register char *input, *output;
|
||
register const char *table;
|
||
register int i, c, changed = 0;
|
||
PyObject *input_obj = (PyObject*)self;
|
||
const char *table1, *output_start, *del_table=NULL;
|
||
int inlen, tablen, dellen = 0;
|
||
PyObject *result;
|
||
int trans_table[256];
|
||
PyObject *tableobj, *delobj = NULL;
|
||
|
||
if (!PyArg_ParseTuple(args, "O|O:translate",
|
||
&tableobj, &delobj))
|
||
return NULL;
|
||
|
||
if (PyString_Check(tableobj)) {
|
||
table1 = PyString_AS_STRING(tableobj);
|
||
tablen = PyString_GET_SIZE(tableobj);
|
||
}
|
||
else if (PyUnicode_Check(tableobj)) {
|
||
/* Unicode .translate() does not support the deletechars
|
||
parameter; instead a mapping to None will cause characters
|
||
to be deleted. */
|
||
if (delobj != NULL) {
|
||
PyErr_SetString(PyExc_TypeError,
|
||
"deletions are implemented differently for unicode");
|
||
return NULL;
|
||
}
|
||
return PyUnicode_Translate((PyObject *)self, tableobj, NULL);
|
||
}
|
||
else if (PyObject_AsCharBuffer(tableobj, &table1, &tablen))
|
||
return NULL;
|
||
|
||
if (delobj != NULL) {
|
||
if (PyString_Check(delobj)) {
|
||
del_table = PyString_AS_STRING(delobj);
|
||
dellen = PyString_GET_SIZE(delobj);
|
||
}
|
||
else if (PyUnicode_Check(delobj)) {
|
||
PyErr_SetString(PyExc_TypeError,
|
||
"deletions are implemented differently for unicode");
|
||
return NULL;
|
||
}
|
||
else if (PyObject_AsCharBuffer(delobj, &del_table, &dellen))
|
||
return NULL;
|
||
|
||
if (tablen != 256) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"translation table must be 256 characters long");
|
||
return NULL;
|
||
}
|
||
}
|
||
else {
|
||
del_table = NULL;
|
||
dellen = 0;
|
||
}
|
||
|
||
table = table1;
|
||
inlen = PyString_Size(input_obj);
|
||
result = PyString_FromStringAndSize((char *)NULL, inlen);
|
||
if (result == NULL)
|
||
return NULL;
|
||
output_start = output = PyString_AsString(result);
|
||
input = PyString_AsString(input_obj);
|
||
|
||
if (dellen == 0) {
|
||
/* If no deletions are required, use faster code */
|
||
for (i = inlen; --i >= 0; ) {
|
||
c = Py_CHARMASK(*input++);
|
||
if (Py_CHARMASK((*output++ = table[c])) != c)
|
||
changed = 1;
|
||
}
|
||
if (changed)
|
||
return result;
|
||
Py_DECREF(result);
|
||
Py_INCREF(input_obj);
|
||
return input_obj;
|
||
}
|
||
|
||
for (i = 0; i < 256; i++)
|
||
trans_table[i] = Py_CHARMASK(table[i]);
|
||
|
||
for (i = 0; i < dellen; i++)
|
||
trans_table[(int) Py_CHARMASK(del_table[i])] = -1;
|
||
|
||
for (i = inlen; --i >= 0; ) {
|
||
c = Py_CHARMASK(*input++);
|
||
if (trans_table[c] != -1)
|
||
if (Py_CHARMASK(*output++ = (char)trans_table[c]) == c)
|
||
continue;
|
||
changed = 1;
|
||
}
|
||
if (!changed) {
|
||
Py_DECREF(result);
|
||
Py_INCREF(input_obj);
|
||
return input_obj;
|
||
}
|
||
/* Fix the size of the resulting string */
|
||
if (inlen > 0 &&_PyString_Resize(&result, output-output_start))
|
||
return NULL;
|
||
return result;
|
||
}
|
||
|
||
|
||
/* What follows is used for implementing replace(). Perry Stoll. */
|
||
|
||
/*
|
||
mymemfind
|
||
|
||
strstr replacement for arbitrary blocks of memory.
|
||
|
||
Locates the first occurrence in the memory pointed to by MEM of the
|
||
contents of memory pointed to by PAT. Returns the index into MEM if
|
||
found, or -1 if not found. If len of PAT is greater than length of
|
||
MEM, the function returns -1.
|
||
*/
|
||
static int
|
||
mymemfind(mem, len, pat, pat_len)
|
||
char *mem;
|
||
int len;
|
||
char *pat;
|
||
int pat_len;
|
||
{
|
||
register int ii;
|
||
|
||
/* pattern can not occur in the last pat_len-1 chars */
|
||
len -= pat_len;
|
||
|
||
for (ii = 0; ii <= len; ii++) {
|
||
if (mem[ii] == pat[0] && memcmp(&mem[ii], pat, pat_len) == 0) {
|
||
return ii;
|
||
}
|
||
}
|
||
return -1;
|
||
}
|
||
|
||
/*
|
||
mymemcnt
|
||
|
||
Return the number of distinct times PAT is found in MEM.
|
||
meaning mem=1111 and pat==11 returns 2.
|
||
mem=11111 and pat==11 also return 2.
|
||
*/
|
||
static int
|
||
mymemcnt(mem, len, pat, pat_len)
|
||
char *mem;
|
||
int len;
|
||
char *pat;
|
||
int pat_len;
|
||
{
|
||
register int offset = 0;
|
||
int nfound = 0;
|
||
|
||
while (len >= 0) {
|
||
offset = mymemfind(mem, len, pat, pat_len);
|
||
if (offset == -1)
|
||
break;
|
||
mem += offset + pat_len;
|
||
len -= offset + pat_len;
|
||
nfound++;
|
||
}
|
||
return nfound;
|
||
}
|
||
|
||
/*
|
||
mymemreplace
|
||
|
||
Return a string in which all occurences of PAT in memory STR are
|
||
replaced with SUB.
|
||
|
||
If length of PAT is less than length of STR or there are no occurences
|
||
of PAT in STR, then the original string is returned. Otherwise, a new
|
||
string is allocated here and returned.
|
||
|
||
on return, out_len is:
|
||
the length of output string, or
|
||
-1 if the input string is returned, or
|
||
unchanged if an error occurs (no memory).
|
||
|
||
return value is:
|
||
the new string allocated locally, or
|
||
NULL if an error occurred.
|
||
*/
|
||
static char *
|
||
mymemreplace(str, len, pat, pat_len, sub, sub_len, count, out_len)
|
||
char *str;
|
||
int len; /* input string */
|
||
char *pat;
|
||
int pat_len; /* pattern string to find */
|
||
char *sub;
|
||
int sub_len; /* substitution string */
|
||
int count; /* number of replacements */
|
||
int *out_len;
|
||
|
||
{
|
||
char *out_s;
|
||
char *new_s;
|
||
int nfound, offset, new_len;
|
||
|
||
if (len == 0 || pat_len > len)
|
||
goto return_same;
|
||
|
||
/* find length of output string */
|
||
nfound = mymemcnt(str, len, pat, pat_len);
|
||
if (count < 0)
|
||
count = INT_MAX;
|
||
else if (nfound > count)
|
||
nfound = count;
|
||
if (nfound == 0)
|
||
goto return_same;
|
||
new_len = len + nfound*(sub_len - pat_len);
|
||
|
||
new_s = (char *)PyMem_MALLOC(new_len);
|
||
if (new_s == NULL) return NULL;
|
||
|
||
*out_len = new_len;
|
||
out_s = new_s;
|
||
|
||
while (len > 0) {
|
||
/* find index of next instance of pattern */
|
||
offset = mymemfind(str, len, pat, pat_len);
|
||
/* if not found, break out of loop */
|
||
if (offset == -1) break;
|
||
|
||
/* copy non matching part of input string */
|
||
memcpy(new_s, str, offset); /* copy part of str before pat */
|
||
str += offset + pat_len; /* move str past pattern */
|
||
len -= offset + pat_len; /* reduce length of str remaining */
|
||
|
||
/* copy substitute into the output string */
|
||
new_s += offset; /* move new_s to dest for sub string */
|
||
memcpy(new_s, sub, sub_len); /* copy substring into new_s */
|
||
new_s += sub_len; /* offset new_s past sub string */
|
||
|
||
/* break when we've done count replacements */
|
||
if (--count == 0) break;
|
||
}
|
||
/* copy any remaining values into output string */
|
||
if (len > 0)
|
||
memcpy(new_s, str, len);
|
||
return out_s;
|
||
|
||
return_same:
|
||
*out_len = -1;
|
||
return str;
|
||
}
|
||
|
||
|
||
static char replace__doc__[] =
|
||
"S.replace (old, new[, maxsplit]) -> string\n\
|
||
\n\
|
||
Return a copy of string S with all occurrences of substring\n\
|
||
old replaced by new. If the optional argument maxsplit is\n\
|
||
given, only the first maxsplit occurrences are replaced.";
|
||
|
||
static PyObject *
|
||
string_replace(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
const char *str = PyString_AS_STRING(self), *sub, *repl;
|
||
char *new_s;
|
||
int len = PyString_GET_SIZE(self), sub_len, repl_len, out_len;
|
||
int count = -1;
|
||
PyObject *new;
|
||
PyObject *subobj, *replobj;
|
||
|
||
if (!PyArg_ParseTuple(args, "OO|i:replace",
|
||
&subobj, &replobj, &count))
|
||
return NULL;
|
||
|
||
if (PyString_Check(subobj)) {
|
||
sub = PyString_AS_STRING(subobj);
|
||
sub_len = PyString_GET_SIZE(subobj);
|
||
}
|
||
else if (PyUnicode_Check(subobj))
|
||
return PyUnicode_Replace((PyObject *)self,
|
||
subobj, replobj, count);
|
||
else if (PyObject_AsCharBuffer(subobj, &sub, &sub_len))
|
||
return NULL;
|
||
|
||
if (PyString_Check(replobj)) {
|
||
repl = PyString_AS_STRING(replobj);
|
||
repl_len = PyString_GET_SIZE(replobj);
|
||
}
|
||
else if (PyUnicode_Check(replobj))
|
||
return PyUnicode_Replace((PyObject *)self,
|
||
subobj, replobj, count);
|
||
else if (PyObject_AsCharBuffer(replobj, &repl, &repl_len))
|
||
return NULL;
|
||
|
||
if (sub_len <= 0) {
|
||
PyErr_SetString(PyExc_ValueError, "empty pattern string");
|
||
return NULL;
|
||
}
|
||
new_s = mymemreplace(str,len,sub,sub_len,repl,repl_len,count,&out_len);
|
||
if (new_s == NULL) {
|
||
PyErr_NoMemory();
|
||
return NULL;
|
||
}
|
||
if (out_len == -1) {
|
||
/* we're returning another reference to self */
|
||
new = (PyObject*)self;
|
||
Py_INCREF(new);
|
||
}
|
||
else {
|
||
new = PyString_FromStringAndSize(new_s, out_len);
|
||
PyMem_FREE(new_s);
|
||
}
|
||
return new;
|
||
}
|
||
|
||
|
||
static char startswith__doc__[] =
|
||
"S.startswith(prefix[, start[, end]]) -> int\n\
|
||
\n\
|
||
Return 1 if S starts with the specified prefix, otherwise return 0. With\n\
|
||
optional start, test S beginning at that position. With optional end, stop\n\
|
||
comparing S at that position.";
|
||
|
||
static PyObject *
|
||
string_startswith(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
const char* str = PyString_AS_STRING(self);
|
||
int len = PyString_GET_SIZE(self);
|
||
const char* prefix;
|
||
int plen;
|
||
int start = 0;
|
||
int end = -1;
|
||
PyObject *subobj;
|
||
|
||
if (!PyArg_ParseTuple(args, "O|O&O&:startswith", &subobj,
|
||
_PyEval_SliceIndex, &start, _PyEval_SliceIndex, &end))
|
||
return NULL;
|
||
if (PyString_Check(subobj)) {
|
||
prefix = PyString_AS_STRING(subobj);
|
||
plen = PyString_GET_SIZE(subobj);
|
||
}
|
||
else if (PyUnicode_Check(subobj))
|
||
return PyInt_FromLong(
|
||
PyUnicode_Tailmatch((PyObject *)self,
|
||
subobj, start, end, -1));
|
||
else if (PyObject_AsCharBuffer(subobj, &prefix, &plen))
|
||
return NULL;
|
||
|
||
/* adopt Java semantics for index out of range. it is legal for
|
||
* offset to be == plen, but this only returns true if prefix is
|
||
* the empty string.
|
||
*/
|
||
if (start < 0 || start+plen > len)
|
||
return PyInt_FromLong(0);
|
||
|
||
if (!memcmp(str+start, prefix, plen)) {
|
||
/* did the match end after the specified end? */
|
||
if (end < 0)
|
||
return PyInt_FromLong(1);
|
||
else if (end - start < plen)
|
||
return PyInt_FromLong(0);
|
||
else
|
||
return PyInt_FromLong(1);
|
||
}
|
||
else return PyInt_FromLong(0);
|
||
}
|
||
|
||
|
||
static char endswith__doc__[] =
|
||
"S.endswith(suffix[, start[, end]]) -> int\n\
|
||
\n\
|
||
Return 1 if S ends with the specified suffix, otherwise return 0. With\n\
|
||
optional start, test S beginning at that position. With optional end, stop\n\
|
||
comparing S at that position.";
|
||
|
||
static PyObject *
|
||
string_endswith(self, args)
|
||
PyStringObject *self;
|
||
PyObject *args;
|
||
{
|
||
const char* str = PyString_AS_STRING(self);
|
||
int len = PyString_GET_SIZE(self);
|
||
const char* suffix;
|
||
int slen;
|
||
int start = 0;
|
||
int end = -1;
|
||
int lower, upper;
|
||
PyObject *subobj;
|
||
|
||
if (!PyArg_ParseTuple(args, "O|O&O&:endswith", &subobj,
|
||
_PyEval_SliceIndex, &start, _PyEval_SliceIndex, &end))
|
||
return NULL;
|
||
if (PyString_Check(subobj)) {
|
||
suffix = PyString_AS_STRING(subobj);
|
||
slen = PyString_GET_SIZE(subobj);
|
||
}
|
||
else if (PyUnicode_Check(subobj))
|
||
return PyInt_FromLong(
|
||
PyUnicode_Tailmatch((PyObject *)self,
|
||
subobj, start, end, +1));
|
||
else if (PyObject_AsCharBuffer(subobj, &suffix, &slen))
|
||
return NULL;
|
||
|
||
if (start < 0 || start > len || slen > len)
|
||
return PyInt_FromLong(0);
|
||
|
||
upper = (end >= 0 && end <= len) ? end : len;
|
||
lower = (upper - slen) > start ? (upper - slen) : start;
|
||
|
||
if (upper-lower >= slen && !memcmp(str+lower, suffix, slen))
|
||
return PyInt_FromLong(1);
|
||
else return PyInt_FromLong(0);
|
||
}
|
||
|
||
|
||
static char expandtabs__doc__[] =
|
||
"S.expandtabs([tabsize]) -> string\n\
|
||
\n\
|
||
Return a copy of S where all tab characters are expanded using spaces.\n\
|
||
If tabsize is not given, a tab size of 8 characters is assumed.";
|
||
|
||
static PyObject*
|
||
string_expandtabs(PyStringObject *self, PyObject *args)
|
||
{
|
||
const char *e, *p;
|
||
char *q;
|
||
int i, j;
|
||
PyObject *u;
|
||
int tabsize = 8;
|
||
|
||
if (!PyArg_ParseTuple(args, "|i:expandtabs", &tabsize))
|
||
return NULL;
|
||
|
||
/* First pass: determine size of ouput string */
|
||
i = j = 0;
|
||
e = PyString_AS_STRING(self) + PyString_GET_SIZE(self);
|
||
for (p = PyString_AS_STRING(self); p < e; p++)
|
||
if (*p == '\t') {
|
||
if (tabsize > 0)
|
||
j += tabsize - (j % tabsize);
|
||
}
|
||
else {
|
||
j++;
|
||
if (*p == '\n' || *p == '\r') {
|
||
i += j;
|
||
j = 0;
|
||
}
|
||
}
|
||
|
||
/* Second pass: create output string and fill it */
|
||
u = PyString_FromStringAndSize(NULL, i + j);
|
||
if (!u)
|
||
return NULL;
|
||
|
||
j = 0;
|
||
q = PyString_AS_STRING(u);
|
||
|
||
for (p = PyString_AS_STRING(self); p < e; p++)
|
||
if (*p == '\t') {
|
||
if (tabsize > 0) {
|
||
i = tabsize - (j % tabsize);
|
||
j += i;
|
||
while (i--)
|
||
*q++ = ' ';
|
||
}
|
||
}
|
||
else {
|
||
j++;
|
||
*q++ = *p;
|
||
if (*p == '\n' || *p == '\r')
|
||
j = 0;
|
||
}
|
||
|
||
return u;
|
||
}
|
||
|
||
static
|
||
PyObject *pad(PyStringObject *self,
|
||
int left,
|
||
int right,
|
||
char fill)
|
||
{
|
||
PyObject *u;
|
||
|
||
if (left < 0)
|
||
left = 0;
|
||
if (right < 0)
|
||
right = 0;
|
||
|
||
if (left == 0 && right == 0) {
|
||
Py_INCREF(self);
|
||
return (PyObject *)self;
|
||
}
|
||
|
||
u = PyString_FromStringAndSize(NULL,
|
||
left + PyString_GET_SIZE(self) + right);
|
||
if (u) {
|
||
if (left)
|
||
memset(PyString_AS_STRING(u), fill, left);
|
||
memcpy(PyString_AS_STRING(u) + left,
|
||
PyString_AS_STRING(self),
|
||
PyString_GET_SIZE(self));
|
||
if (right)
|
||
memset(PyString_AS_STRING(u) + left + PyString_GET_SIZE(self),
|
||
fill, right);
|
||
}
|
||
|
||
return u;
|
||
}
|
||
|
||
static char ljust__doc__[] =
|
||
"S.ljust(width) -> string\n\
|
||
\n\
|
||
Return S left justified in a string of length width. Padding is\n\
|
||
done using spaces.";
|
||
|
||
static PyObject *
|
||
string_ljust(PyStringObject *self, PyObject *args)
|
||
{
|
||
int width;
|
||
if (!PyArg_ParseTuple(args, "i:ljust", &width))
|
||
return NULL;
|
||
|
||
if (PyString_GET_SIZE(self) >= width) {
|
||
Py_INCREF(self);
|
||
return (PyObject*) self;
|
||
}
|
||
|
||
return pad(self, 0, width - PyString_GET_SIZE(self), ' ');
|
||
}
|
||
|
||
|
||
static char rjust__doc__[] =
|
||
"S.rjust(width) -> string\n\
|
||
\n\
|
||
Return S right justified in a string of length width. Padding is\n\
|
||
done using spaces.";
|
||
|
||
static PyObject *
|
||
string_rjust(PyStringObject *self, PyObject *args)
|
||
{
|
||
int width;
|
||
if (!PyArg_ParseTuple(args, "i:rjust", &width))
|
||
return NULL;
|
||
|
||
if (PyString_GET_SIZE(self) >= width) {
|
||
Py_INCREF(self);
|
||
return (PyObject*) self;
|
||
}
|
||
|
||
return pad(self, width - PyString_GET_SIZE(self), 0, ' ');
|
||
}
|
||
|
||
|
||
static char center__doc__[] =
|
||
"S.center(width) -> string\n\
|
||
\n\
|
||
Return S centered in a string of length width. Padding is done\n\
|
||
using spaces.";
|
||
|
||
static PyObject *
|
||
string_center(PyStringObject *self, PyObject *args)
|
||
{
|
||
int marg, left;
|
||
int width;
|
||
|
||
if (!PyArg_ParseTuple(args, "i:center", &width))
|
||
return NULL;
|
||
|
||
if (PyString_GET_SIZE(self) >= width) {
|
||
Py_INCREF(self);
|
||
return (PyObject*) self;
|
||
}
|
||
|
||
marg = width - PyString_GET_SIZE(self);
|
||
left = marg / 2 + (marg & width & 1);
|
||
|
||
return pad(self, left, marg - left, ' ');
|
||
}
|
||
|
||
#if 0
|
||
static char zfill__doc__[] =
|
||
"S.zfill(width) -> string\n\
|
||
\n\
|
||
Pad a numeric string x with zeros on the left, to fill a field\n\
|
||
of the specified width. The string x is never truncated.";
|
||
|
||
static PyObject *
|
||
string_zfill(PyStringObject *self, PyObject *args)
|
||
{
|
||
int fill;
|
||
PyObject *u;
|
||
char *str;
|
||
|
||
int width;
|
||
if (!PyArg_ParseTuple(args, "i:zfill", &width))
|
||
return NULL;
|
||
|
||
if (PyString_GET_SIZE(self) >= width) {
|
||
Py_INCREF(self);
|
||
return (PyObject*) self;
|
||
}
|
||
|
||
fill = width - PyString_GET_SIZE(self);
|
||
|
||
u = pad(self, fill, 0, '0');
|
||
if (u == NULL)
|
||
return NULL;
|
||
|
||
str = PyString_AS_STRING(u);
|
||
if (str[fill] == '+' || str[fill] == '-') {
|
||
/* move sign to beginning of string */
|
||
str[0] = str[fill];
|
||
str[fill] = '0';
|
||
}
|
||
|
||
return u;
|
||
}
|
||
#endif
|
||
|
||
static char isspace__doc__[] =
|
||
"S.isspace() -> int\n\
|
||
\n\
|
||
Return 1 if there are only whitespace characters in S,\n\
|
||
0 otherwise.";
|
||
|
||
static PyObject*
|
||
string_isspace(PyStringObject *self, PyObject *args)
|
||
{
|
||
register const unsigned char *p = (unsigned char *) PyString_AS_STRING(self);
|
||
register const unsigned char *e;
|
||
|
||
if (!PyArg_NoArgs(args))
|
||
return NULL;
|
||
|
||
/* Shortcut for single character strings */
|
||
if (PyString_GET_SIZE(self) == 1 &&
|
||
isspace(*p))
|
||
return PyInt_FromLong(1);
|
||
|
||
/* Special case for empty strings */
|
||
if (PyString_GET_SIZE(self) == 0)
|
||
return PyInt_FromLong(0);
|
||
|
||
e = p + PyString_GET_SIZE(self);
|
||
for (; p < e; p++) {
|
||
if (!isspace(*p))
|
||
return PyInt_FromLong(0);
|
||
}
|
||
return PyInt_FromLong(1);
|
||
}
|
||
|
||
|
||
static char isdigit__doc__[] =
|
||
"S.isdigit() -> int\n\
|
||
\n\
|
||
Return 1 if there are only digit characters in S,\n\
|
||
0 otherwise.";
|
||
|
||
static PyObject*
|
||
string_isdigit(PyStringObject *self, PyObject *args)
|
||
{
|
||
register const unsigned char *p = (unsigned char *) PyString_AS_STRING(self);
|
||
register const unsigned char *e;
|
||
|
||
if (!PyArg_NoArgs(args))
|
||
return NULL;
|
||
|
||
/* Shortcut for single character strings */
|
||
if (PyString_GET_SIZE(self) == 1 &&
|
||
isdigit(*p))
|
||
return PyInt_FromLong(1);
|
||
|
||
/* Special case for empty strings */
|
||
if (PyString_GET_SIZE(self) == 0)
|
||
return PyInt_FromLong(0);
|
||
|
||
e = p + PyString_GET_SIZE(self);
|
||
for (; p < e; p++) {
|
||
if (!isdigit(*p))
|
||
return PyInt_FromLong(0);
|
||
}
|
||
return PyInt_FromLong(1);
|
||
}
|
||
|
||
|
||
static char islower__doc__[] =
|
||
"S.islower() -> int\n\
|
||
\n\
|
||
Return 1 if all cased characters in S are lowercase and there is\n\
|
||
at least one cased character in S, 0 otherwise.";
|
||
|
||
static PyObject*
|
||
string_islower(PyStringObject *self, PyObject *args)
|
||
{
|
||
register const unsigned char *p = (unsigned char *) PyString_AS_STRING(self);
|
||
register const unsigned char *e;
|
||
int cased;
|
||
|
||
if (!PyArg_NoArgs(args))
|
||
return NULL;
|
||
|
||
/* Shortcut for single character strings */
|
||
if (PyString_GET_SIZE(self) == 1)
|
||
return PyInt_FromLong(islower(*p) != 0);
|
||
|
||
/* Special case for empty strings */
|
||
if (PyString_GET_SIZE(self) == 0)
|
||
return PyInt_FromLong(0);
|
||
|
||
e = p + PyString_GET_SIZE(self);
|
||
cased = 0;
|
||
for (; p < e; p++) {
|
||
if (isupper(*p))
|
||
return PyInt_FromLong(0);
|
||
else if (!cased && islower(*p))
|
||
cased = 1;
|
||
}
|
||
return PyInt_FromLong(cased);
|
||
}
|
||
|
||
|
||
static char isupper__doc__[] =
|
||
"S.isupper() -> int\n\
|
||
\n\
|
||
Return 1 if all cased characters in S are uppercase and there is\n\
|
||
at least one cased character in S, 0 otherwise.";
|
||
|
||
static PyObject*
|
||
string_isupper(PyStringObject *self, PyObject *args)
|
||
{
|
||
register const unsigned char *p = (unsigned char *) PyString_AS_STRING(self);
|
||
register const unsigned char *e;
|
||
int cased;
|
||
|
||
if (!PyArg_NoArgs(args))
|
||
return NULL;
|
||
|
||
/* Shortcut for single character strings */
|
||
if (PyString_GET_SIZE(self) == 1)
|
||
return PyInt_FromLong(isupper(*p) != 0);
|
||
|
||
/* Special case for empty strings */
|
||
if (PyString_GET_SIZE(self) == 0)
|
||
return PyInt_FromLong(0);
|
||
|
||
e = p + PyString_GET_SIZE(self);
|
||
cased = 0;
|
||
for (; p < e; p++) {
|
||
if (islower(*p))
|
||
return PyInt_FromLong(0);
|
||
else if (!cased && isupper(*p))
|
||
cased = 1;
|
||
}
|
||
return PyInt_FromLong(cased);
|
||
}
|
||
|
||
|
||
static char istitle__doc__[] =
|
||
"S.istitle() -> int\n\
|
||
\n\
|
||
Return 1 if S is a titlecased string, i.e. uppercase characters\n\
|
||
may only follow uncased characters and lowercase characters only cased\n\
|
||
ones. Return 0 otherwise.";
|
||
|
||
static PyObject*
|
||
string_istitle(PyStringObject *self, PyObject *args)
|
||
{
|
||
register const unsigned char *p = (unsigned char *) PyString_AS_STRING(self);
|
||
register const unsigned char *e;
|
||
int cased, previous_is_cased;
|
||
|
||
if (!PyArg_NoArgs(args))
|
||
return NULL;
|
||
|
||
/* Shortcut for single character strings */
|
||
if (PyString_GET_SIZE(self) == 1)
|
||
return PyInt_FromLong(isupper(*p) != 0);
|
||
|
||
/* Special case for empty strings */
|
||
if (PyString_GET_SIZE(self) == 0)
|
||
return PyInt_FromLong(0);
|
||
|
||
e = p + PyString_GET_SIZE(self);
|
||
cased = 0;
|
||
previous_is_cased = 0;
|
||
for (; p < e; p++) {
|
||
register const unsigned char ch = *p;
|
||
|
||
if (isupper(ch)) {
|
||
if (previous_is_cased)
|
||
return PyInt_FromLong(0);
|
||
previous_is_cased = 1;
|
||
cased = 1;
|
||
}
|
||
else if (islower(ch)) {
|
||
if (!previous_is_cased)
|
||
return PyInt_FromLong(0);
|
||
previous_is_cased = 1;
|
||
cased = 1;
|
||
}
|
||
else
|
||
previous_is_cased = 0;
|
||
}
|
||
return PyInt_FromLong(cased);
|
||
}
|
||
|
||
|
||
static char splitlines__doc__[] =
|
||
"S.splitlines([keepends]]) -> list of strings\n\
|
||
\n\
|
||
Return a list of the lines in S, breaking at line boundaries.\n\
|
||
Line breaks are not included in the resulting list unless keepends\n\
|
||
is given and true.";
|
||
|
||
#define SPLIT_APPEND(data, left, right) \
|
||
str = PyString_FromStringAndSize(data + left, right - left); \
|
||
if (!str) \
|
||
goto onError; \
|
||
if (PyList_Append(list, str)) { \
|
||
Py_DECREF(str); \
|
||
goto onError; \
|
||
} \
|
||
else \
|
||
Py_DECREF(str);
|
||
|
||
static PyObject*
|
||
string_splitlines(PyStringObject *self, PyObject *args)
|
||
{
|
||
register int i;
|
||
register int j;
|
||
int len;
|
||
int keepends = 0;
|
||
PyObject *list;
|
||
PyObject *str;
|
||
char *data;
|
||
|
||
if (!PyArg_ParseTuple(args, "|i:splitlines", &keepends))
|
||
return NULL;
|
||
|
||
data = PyString_AS_STRING(self);
|
||
len = PyString_GET_SIZE(self);
|
||
|
||
list = PyList_New(0);
|
||
if (!list)
|
||
goto onError;
|
||
|
||
for (i = j = 0; i < len; ) {
|
||
int eol;
|
||
|
||
/* Find a line and append it */
|
||
while (i < len && data[i] != '\n' && data[i] != '\r')
|
||
i++;
|
||
|
||
/* Skip the line break reading CRLF as one line break */
|
||
eol = i;
|
||
if (i < len) {
|
||
if (data[i] == '\r' && i + 1 < len &&
|
||
data[i+1] == '\n')
|
||
i += 2;
|
||
else
|
||
i++;
|
||
if (keepends)
|
||
eol = i;
|
||
}
|
||
SPLIT_APPEND(data, j, eol);
|
||
j = i;
|
||
}
|
||
if (j < len) {
|
||
SPLIT_APPEND(data, j, len);
|
||
}
|
||
|
||
return list;
|
||
|
||
onError:
|
||
Py_DECREF(list);
|
||
return NULL;
|
||
}
|
||
|
||
#undef SPLIT_APPEND
|
||
|
||
|
||
static PyMethodDef
|
||
string_methods[] = {
|
||
/* Counterparts of the obsolete stropmodule functions; except
|
||
string.maketrans(). */
|
||
{"join", (PyCFunction)string_join, 1, join__doc__},
|
||
{"split", (PyCFunction)string_split, 1, split__doc__},
|
||
{"lower", (PyCFunction)string_lower, 1, lower__doc__},
|
||
{"upper", (PyCFunction)string_upper, 1, upper__doc__},
|
||
{"islower", (PyCFunction)string_islower, 0, islower__doc__},
|
||
{"isupper", (PyCFunction)string_isupper, 0, isupper__doc__},
|
||
{"isspace", (PyCFunction)string_isspace, 0, isspace__doc__},
|
||
{"isdigit", (PyCFunction)string_isdigit, 0, isdigit__doc__},
|
||
{"istitle", (PyCFunction)string_istitle, 0, istitle__doc__},
|
||
{"capitalize", (PyCFunction)string_capitalize, 1, capitalize__doc__},
|
||
{"count", (PyCFunction)string_count, 1, count__doc__},
|
||
{"endswith", (PyCFunction)string_endswith, 1, endswith__doc__},
|
||
{"find", (PyCFunction)string_find, 1, find__doc__},
|
||
{"index", (PyCFunction)string_index, 1, index__doc__},
|
||
{"lstrip", (PyCFunction)string_lstrip, 1, lstrip__doc__},
|
||
{"replace", (PyCFunction)string_replace, 1, replace__doc__},
|
||
{"rfind", (PyCFunction)string_rfind, 1, rfind__doc__},
|
||
{"rindex", (PyCFunction)string_rindex, 1, rindex__doc__},
|
||
{"rstrip", (PyCFunction)string_rstrip, 1, rstrip__doc__},
|
||
{"startswith", (PyCFunction)string_startswith, 1, startswith__doc__},
|
||
{"strip", (PyCFunction)string_strip, 1, strip__doc__},
|
||
{"swapcase", (PyCFunction)string_swapcase, 1, swapcase__doc__},
|
||
{"translate", (PyCFunction)string_translate, 1, translate__doc__},
|
||
{"title", (PyCFunction)string_title, 1, title__doc__},
|
||
{"ljust", (PyCFunction)string_ljust, 1, ljust__doc__},
|
||
{"rjust", (PyCFunction)string_rjust, 1, rjust__doc__},
|
||
{"center", (PyCFunction)string_center, 1, center__doc__},
|
||
{"expandtabs", (PyCFunction)string_expandtabs, 1, expandtabs__doc__},
|
||
{"splitlines", (PyCFunction)string_splitlines, 1, splitlines__doc__},
|
||
#if 0
|
||
{"zfill", (PyCFunction)string_zfill, 1, zfill__doc__},
|
||
#endif
|
||
{NULL, NULL} /* sentinel */
|
||
};
|
||
|
||
static PyObject *
|
||
string_getattr(s, name)
|
||
PyStringObject *s;
|
||
char *name;
|
||
{
|
||
return Py_FindMethod(string_methods, (PyObject*)s, name);
|
||
}
|
||
|
||
|
||
PyTypeObject PyString_Type = {
|
||
PyObject_HEAD_INIT(&PyType_Type)
|
||
0,
|
||
"string",
|
||
sizeof(PyStringObject),
|
||
sizeof(char),
|
||
(destructor)string_dealloc, /*tp_dealloc*/
|
||
(printfunc)string_print, /*tp_print*/
|
||
(getattrfunc)string_getattr, /*tp_getattr*/
|
||
0, /*tp_setattr*/
|
||
(cmpfunc)string_compare, /*tp_compare*/
|
||
(reprfunc)string_repr, /*tp_repr*/
|
||
0, /*tp_as_number*/
|
||
&string_as_sequence, /*tp_as_sequence*/
|
||
0, /*tp_as_mapping*/
|
||
(hashfunc)string_hash, /*tp_hash*/
|
||
0, /*tp_call*/
|
||
0, /*tp_str*/
|
||
0, /*tp_getattro*/
|
||
0, /*tp_setattro*/
|
||
&string_as_buffer, /*tp_as_buffer*/
|
||
Py_TPFLAGS_DEFAULT, /*tp_flags*/
|
||
0, /*tp_doc*/
|
||
};
|
||
|
||
void
|
||
PyString_Concat(pv, w)
|
||
register PyObject **pv;
|
||
register PyObject *w;
|
||
{
|
||
register PyObject *v;
|
||
if (*pv == NULL)
|
||
return;
|
||
if (w == NULL || !PyString_Check(*pv)) {
|
||
Py_DECREF(*pv);
|
||
*pv = NULL;
|
||
return;
|
||
}
|
||
v = string_concat((PyStringObject *) *pv, w);
|
||
Py_DECREF(*pv);
|
||
*pv = v;
|
||
}
|
||
|
||
void
|
||
PyString_ConcatAndDel(pv, w)
|
||
register PyObject **pv;
|
||
register PyObject *w;
|
||
{
|
||
PyString_Concat(pv, w);
|
||
Py_XDECREF(w);
|
||
}
|
||
|
||
|
||
/* The following function breaks the notion that strings are immutable:
|
||
it changes the size of a string. We get away with this only if there
|
||
is only one module referencing the object. You can also think of it
|
||
as creating a new string object and destroying the old one, only
|
||
more efficiently. In any case, don't use this if the string may
|
||
already be known to some other part of the code... */
|
||
|
||
int
|
||
_PyString_Resize(pv, newsize)
|
||
PyObject **pv;
|
||
int newsize;
|
||
{
|
||
register PyObject *v;
|
||
register PyStringObject *sv;
|
||
v = *pv;
|
||
if (!PyString_Check(v) || v->ob_refcnt != 1) {
|
||
*pv = 0;
|
||
Py_DECREF(v);
|
||
PyErr_BadInternalCall();
|
||
return -1;
|
||
}
|
||
/* XXX UNREF/NEWREF interface should be more symmetrical */
|
||
#ifdef Py_REF_DEBUG
|
||
--_Py_RefTotal;
|
||
#endif
|
||
_Py_ForgetReference(v);
|
||
*pv = (PyObject *)
|
||
PyObject_REALLOC((char *)v,
|
||
sizeof(PyStringObject) + newsize * sizeof(char));
|
||
if (*pv == NULL) {
|
||
PyObject_DEL(v);
|
||
PyErr_NoMemory();
|
||
return -1;
|
||
}
|
||
_Py_NewReference(*pv);
|
||
sv = (PyStringObject *) *pv;
|
||
sv->ob_size = newsize;
|
||
sv->ob_sval[newsize] = '\0';
|
||
return 0;
|
||
}
|
||
|
||
/* Helpers for formatstring */
|
||
|
||
static PyObject *
|
||
getnextarg(args, arglen, p_argidx)
|
||
PyObject *args;
|
||
int arglen;
|
||
int *p_argidx;
|
||
{
|
||
int argidx = *p_argidx;
|
||
if (argidx < arglen) {
|
||
(*p_argidx)++;
|
||
if (arglen < 0)
|
||
return args;
|
||
else
|
||
return PyTuple_GetItem(args, argidx);
|
||
}
|
||
PyErr_SetString(PyExc_TypeError,
|
||
"not enough arguments for format string");
|
||
return NULL;
|
||
}
|
||
|
||
#define F_LJUST (1<<0)
|
||
#define F_SIGN (1<<1)
|
||
#define F_BLANK (1<<2)
|
||
#define F_ALT (1<<3)
|
||
#define F_ZERO (1<<4)
|
||
|
||
static int
|
||
formatfloat(buf, flags, prec, type, v)
|
||
char *buf;
|
||
int flags;
|
||
int prec;
|
||
int type;
|
||
PyObject *v;
|
||
{
|
||
char fmt[20];
|
||
double x;
|
||
if (!PyArg_Parse(v, "d;float argument required", &x))
|
||
return -1;
|
||
if (prec < 0)
|
||
prec = 6;
|
||
if (prec > 50)
|
||
prec = 50; /* Arbitrary limitation */
|
||
if (type == 'f' && fabs(x)/1e25 >= 1e25)
|
||
type = 'g';
|
||
sprintf(fmt, "%%%s.%d%c", (flags&F_ALT) ? "#" : "", prec, type);
|
||
sprintf(buf, fmt, x);
|
||
return strlen(buf);
|
||
}
|
||
|
||
static int
|
||
formatint(buf, flags, prec, type, v)
|
||
char *buf;
|
||
int flags;
|
||
int prec;
|
||
int type;
|
||
PyObject *v;
|
||
{
|
||
char fmt[20];
|
||
long x;
|
||
if (!PyArg_Parse(v, "l;int argument required", &x))
|
||
return -1;
|
||
if (prec < 0)
|
||
prec = 1;
|
||
sprintf(fmt, "%%%s.%dl%c", (flags&F_ALT) ? "#" : "", prec, type);
|
||
sprintf(buf, fmt, x);
|
||
return strlen(buf);
|
||
}
|
||
|
||
static int
|
||
formatchar(buf, v)
|
||
char *buf;
|
||
PyObject *v;
|
||
{
|
||
if (PyString_Check(v)) {
|
||
if (!PyArg_Parse(v, "c;%c requires int or char", &buf[0]))
|
||
return -1;
|
||
}
|
||
else {
|
||
if (!PyArg_Parse(v, "b;%c requires int or char", &buf[0]))
|
||
return -1;
|
||
}
|
||
buf[1] = '\0';
|
||
return 1;
|
||
}
|
||
|
||
|
||
/* fmt%(v1,v2,...) is roughly equivalent to sprintf(fmt, v1, v2, ...) */
|
||
|
||
PyObject *
|
||
PyString_Format(format, args)
|
||
PyObject *format;
|
||
PyObject *args;
|
||
{
|
||
char *fmt, *res;
|
||
int fmtcnt, rescnt, reslen, arglen, argidx;
|
||
int args_owned = 0;
|
||
PyObject *result, *orig_args;
|
||
PyObject *dict = NULL;
|
||
if (format == NULL || !PyString_Check(format) || args == NULL) {
|
||
PyErr_BadInternalCall();
|
||
return NULL;
|
||
}
|
||
orig_args = args;
|
||
fmt = PyString_AsString(format);
|
||
fmtcnt = PyString_Size(format);
|
||
reslen = rescnt = fmtcnt + 100;
|
||
result = PyString_FromStringAndSize((char *)NULL, reslen);
|
||
if (result == NULL)
|
||
return NULL;
|
||
res = PyString_AsString(result);
|
||
if (PyTuple_Check(args)) {
|
||
arglen = PyTuple_Size(args);
|
||
argidx = 0;
|
||
}
|
||
else {
|
||
arglen = -1;
|
||
argidx = -2;
|
||
}
|
||
if (args->ob_type->tp_as_mapping)
|
||
dict = args;
|
||
while (--fmtcnt >= 0) {
|
||
if (*fmt != '%') {
|
||
if (--rescnt < 0) {
|
||
rescnt = fmtcnt + 100;
|
||
reslen += rescnt;
|
||
if (_PyString_Resize(&result, reslen) < 0)
|
||
return NULL;
|
||
res = PyString_AsString(result)
|
||
+ reslen - rescnt;
|
||
--rescnt;
|
||
}
|
||
*res++ = *fmt++;
|
||
}
|
||
else {
|
||
/* Got a format specifier */
|
||
int flags = 0;
|
||
int width = -1;
|
||
int prec = -1;
|
||
int size = 0;
|
||
int c = '\0';
|
||
int fill;
|
||
PyObject *v = NULL;
|
||
PyObject *temp = NULL;
|
||
char *buf;
|
||
int sign;
|
||
int len;
|
||
char tmpbuf[120]; /* For format{float,int,char}() */
|
||
char *fmt_start = fmt;
|
||
|
||
fmt++;
|
||
if (*fmt == '(') {
|
||
char *keystart;
|
||
int keylen;
|
||
PyObject *key;
|
||
int pcount = 1;
|
||
|
||
if (dict == NULL) {
|
||
PyErr_SetString(PyExc_TypeError,
|
||
"format requires a mapping");
|
||
goto error;
|
||
}
|
||
++fmt;
|
||
--fmtcnt;
|
||
keystart = fmt;
|
||
/* Skip over balanced parentheses */
|
||
while (pcount > 0 && --fmtcnt >= 0) {
|
||
if (*fmt == ')')
|
||
--pcount;
|
||
else if (*fmt == '(')
|
||
++pcount;
|
||
fmt++;
|
||
}
|
||
keylen = fmt - keystart - 1;
|
||
if (fmtcnt < 0 || pcount > 0) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"incomplete format key");
|
||
goto error;
|
||
}
|
||
key = PyString_FromStringAndSize(keystart,
|
||
keylen);
|
||
if (key == NULL)
|
||
goto error;
|
||
if (args_owned) {
|
||
Py_DECREF(args);
|
||
args_owned = 0;
|
||
}
|
||
args = PyObject_GetItem(dict, key);
|
||
Py_DECREF(key);
|
||
if (args == NULL) {
|
||
goto error;
|
||
}
|
||
args_owned = 1;
|
||
arglen = -1;
|
||
argidx = -2;
|
||
}
|
||
while (--fmtcnt >= 0) {
|
||
switch (c = *fmt++) {
|
||
case '-': flags |= F_LJUST; continue;
|
||
case '+': flags |= F_SIGN; continue;
|
||
case ' ': flags |= F_BLANK; continue;
|
||
case '#': flags |= F_ALT; continue;
|
||
case '0': flags |= F_ZERO; continue;
|
||
}
|
||
break;
|
||
}
|
||
if (c == '*') {
|
||
v = getnextarg(args, arglen, &argidx);
|
||
if (v == NULL)
|
||
goto error;
|
||
if (!PyInt_Check(v)) {
|
||
PyErr_SetString(PyExc_TypeError,
|
||
"* wants int");
|
||
goto error;
|
||
}
|
||
width = PyInt_AsLong(v);
|
||
if (width < 0) {
|
||
flags |= F_LJUST;
|
||
width = -width;
|
||
}
|
||
if (--fmtcnt >= 0)
|
||
c = *fmt++;
|
||
}
|
||
else if (c >= 0 && isdigit(c)) {
|
||
width = c - '0';
|
||
while (--fmtcnt >= 0) {
|
||
c = Py_CHARMASK(*fmt++);
|
||
if (!isdigit(c))
|
||
break;
|
||
if ((width*10) / 10 != width) {
|
||
PyErr_SetString(
|
||
PyExc_ValueError,
|
||
"width too big");
|
||
goto error;
|
||
}
|
||
width = width*10 + (c - '0');
|
||
}
|
||
}
|
||
if (c == '.') {
|
||
prec = 0;
|
||
if (--fmtcnt >= 0)
|
||
c = *fmt++;
|
||
if (c == '*') {
|
||
v = getnextarg(args, arglen, &argidx);
|
||
if (v == NULL)
|
||
goto error;
|
||
if (!PyInt_Check(v)) {
|
||
PyErr_SetString(
|
||
PyExc_TypeError,
|
||
"* wants int");
|
||
goto error;
|
||
}
|
||
prec = PyInt_AsLong(v);
|
||
if (prec < 0)
|
||
prec = 0;
|
||
if (--fmtcnt >= 0)
|
||
c = *fmt++;
|
||
}
|
||
else if (c >= 0 && isdigit(c)) {
|
||
prec = c - '0';
|
||
while (--fmtcnt >= 0) {
|
||
c = Py_CHARMASK(*fmt++);
|
||
if (!isdigit(c))
|
||
break;
|
||
if ((prec*10) / 10 != prec) {
|
||
PyErr_SetString(
|
||
PyExc_ValueError,
|
||
"prec too big");
|
||
goto error;
|
||
}
|
||
prec = prec*10 + (c - '0');
|
||
}
|
||
}
|
||
} /* prec */
|
||
if (fmtcnt >= 0) {
|
||
if (c == 'h' || c == 'l' || c == 'L') {
|
||
size = c;
|
||
if (--fmtcnt >= 0)
|
||
c = *fmt++;
|
||
}
|
||
}
|
||
if (fmtcnt < 0) {
|
||
PyErr_SetString(PyExc_ValueError,
|
||
"incomplete format");
|
||
goto error;
|
||
}
|
||
if (c != '%') {
|
||
v = getnextarg(args, arglen, &argidx);
|
||
if (v == NULL)
|
||
goto error;
|
||
}
|
||
sign = 0;
|
||
fill = ' ';
|
||
switch (c) {
|
||
case '%':
|
||
buf = "%";
|
||
len = 1;
|
||
break;
|
||
case 's':
|
||
case 'r':
|
||
if (PyUnicode_Check(v)) {
|
||
fmt = fmt_start;
|
||
goto unicode;
|
||
}
|
||
if (c == 's')
|
||
temp = PyObject_Str(v);
|
||
else
|
||
temp = PyObject_Repr(v);
|
||
if (temp == NULL)
|
||
goto error;
|
||
if (!PyString_Check(temp)) {
|
||
PyErr_SetString(PyExc_TypeError,
|
||
"%s argument has non-string str()");
|
||
goto error;
|
||
}
|
||
buf = PyString_AsString(temp);
|
||
len = PyString_Size(temp);
|
||
if (prec >= 0 && len > prec)
|
||
len = prec;
|
||
break;
|
||
case 'i':
|
||
case 'd':
|
||
case 'u':
|
||
case 'o':
|
||
case 'x':
|
||
case 'X':
|
||
if (c == 'i')
|
||
c = 'd';
|
||
buf = tmpbuf;
|
||
len = formatint(buf, flags, prec, c, v);
|
||
if (len < 0)
|
||
goto error;
|
||
sign = (c == 'd');
|
||
if (flags&F_ZERO) {
|
||
fill = '0';
|
||
if ((flags&F_ALT) &&
|
||
(c == 'x' || c == 'X') &&
|
||
buf[0] == '0' && buf[1] == c) {
|
||
*res++ = *buf++;
|
||
*res++ = *buf++;
|
||
rescnt -= 2;
|
||
len -= 2;
|
||
width -= 2;
|
||
if (width < 0)
|
||
width = 0;
|
||
}
|
||
}
|
||
break;
|
||
case 'e':
|
||
case 'E':
|
||
case 'f':
|
||
case 'g':
|
||
case 'G':
|
||
buf = tmpbuf;
|
||
len = formatfloat(buf, flags, prec, c, v);
|
||
if (len < 0)
|
||
goto error;
|
||
sign = 1;
|
||
if (flags&F_ZERO)
|
||
fill = '0';
|
||
break;
|
||
case 'c':
|
||
buf = tmpbuf;
|
||
len = formatchar(buf, v);
|
||
if (len < 0)
|
||
goto error;
|
||
break;
|
||
default:
|
||
PyErr_Format(PyExc_ValueError,
|
||
"unsupported format character '%c' (0x%x)",
|
||
c, c);
|
||
goto error;
|
||
}
|
||
if (sign) {
|
||
if (*buf == '-' || *buf == '+') {
|
||
sign = *buf++;
|
||
len--;
|
||
}
|
||
else if (flags & F_SIGN)
|
||
sign = '+';
|
||
else if (flags & F_BLANK)
|
||
sign = ' ';
|
||
else
|
||
sign = '\0';
|
||
}
|
||
if (width < len)
|
||
width = len;
|
||
if (rescnt < width + (sign != '\0')) {
|
||
reslen -= rescnt;
|
||
rescnt = width + fmtcnt + 100;
|
||
reslen += rescnt;
|
||
if (_PyString_Resize(&result, reslen) < 0)
|
||
return NULL;
|
||
res = PyString_AsString(result)
|
||
+ reslen - rescnt;
|
||
}
|
||
if (sign) {
|
||
if (fill != ' ')
|
||
*res++ = sign;
|
||
rescnt--;
|
||
if (width > len)
|
||
width--;
|
||
}
|
||
if (width > len && !(flags&F_LJUST)) {
|
||
do {
|
||
--rescnt;
|
||
*res++ = fill;
|
||
} while (--width > len);
|
||
}
|
||
if (sign && fill == ' ')
|
||
*res++ = sign;
|
||
memcpy(res, buf, len);
|
||
res += len;
|
||
rescnt -= len;
|
||
while (--width >= len) {
|
||
--rescnt;
|
||
*res++ = ' ';
|
||
}
|
||
if (dict && (argidx < arglen) && c != '%') {
|
||
PyErr_SetString(PyExc_TypeError,
|
||
"not all arguments converted");
|
||
goto error;
|
||
}
|
||
Py_XDECREF(temp);
|
||
} /* '%' */
|
||
} /* until end */
|
||
if (argidx < arglen && !dict) {
|
||
PyErr_SetString(PyExc_TypeError,
|
||
"not all arguments converted");
|
||
goto error;
|
||
}
|
||
if (args_owned) {
|
||
Py_DECREF(args);
|
||
}
|
||
_PyString_Resize(&result, reslen - rescnt);
|
||
return result;
|
||
|
||
unicode:
|
||
if (args_owned) {
|
||
Py_DECREF(args);
|
||
args_owned = 0;
|
||
}
|
||
/* Fiddle args right (remove the first argidx-1 arguments) */
|
||
--argidx;
|
||
if (PyTuple_Check(orig_args) && argidx > 0) {
|
||
PyObject *v;
|
||
int n = PyTuple_GET_SIZE(orig_args) - argidx;
|
||
v = PyTuple_New(n);
|
||
if (v == NULL)
|
||
goto error;
|
||
while (--n >= 0) {
|
||
PyObject *w = PyTuple_GET_ITEM(orig_args, n + argidx);
|
||
Py_INCREF(w);
|
||
PyTuple_SET_ITEM(v, n, w);
|
||
}
|
||
args = v;
|
||
} else {
|
||
Py_INCREF(orig_args);
|
||
args = orig_args;
|
||
}
|
||
/* Paste rest of format string to what we have of the result
|
||
string; we reuse result for this */
|
||
rescnt = res - PyString_AS_STRING(result);
|
||
fmtcnt = PyString_GET_SIZE(format) - \
|
||
(fmt - PyString_AS_STRING(format));
|
||
if (_PyString_Resize(&result, rescnt + fmtcnt)) {
|
||
Py_DECREF(args);
|
||
goto error;
|
||
}
|
||
memcpy(PyString_AS_STRING(result) + rescnt, fmt, fmtcnt);
|
||
format = result;
|
||
/* Let Unicode do its magic */
|
||
result = PyUnicode_Format(format, args);
|
||
Py_DECREF(format);
|
||
Py_DECREF(args);
|
||
return result;
|
||
|
||
error:
|
||
Py_DECREF(result);
|
||
if (args_owned) {
|
||
Py_DECREF(args);
|
||
}
|
||
return NULL;
|
||
}
|
||
|
||
|
||
#ifdef INTERN_STRINGS
|
||
|
||
static PyObject *interned;
|
||
|
||
void
|
||
PyString_InternInPlace(p)
|
||
PyObject **p;
|
||
{
|
||
register PyStringObject *s = (PyStringObject *)(*p);
|
||
PyObject *t;
|
||
if (s == NULL || !PyString_Check(s))
|
||
Py_FatalError("PyString_InternInPlace: strings only please!");
|
||
if ((t = s->ob_sinterned) != NULL) {
|
||
if (t == (PyObject *)s)
|
||
return;
|
||
Py_INCREF(t);
|
||
*p = t;
|
||
Py_DECREF(s);
|
||
return;
|
||
}
|
||
if (interned == NULL) {
|
||
interned = PyDict_New();
|
||
if (interned == NULL)
|
||
return;
|
||
}
|
||
if ((t = PyDict_GetItem(interned, (PyObject *)s)) != NULL) {
|
||
Py_INCREF(t);
|
||
*p = s->ob_sinterned = t;
|
||
Py_DECREF(s);
|
||
return;
|
||
}
|
||
t = (PyObject *)s;
|
||
if (PyDict_SetItem(interned, t, t) == 0) {
|
||
s->ob_sinterned = t;
|
||
return;
|
||
}
|
||
PyErr_Clear();
|
||
}
|
||
|
||
|
||
PyObject *
|
||
PyString_InternFromString(cp)
|
||
const char *cp;
|
||
{
|
||
PyObject *s = PyString_FromString(cp);
|
||
if (s == NULL)
|
||
return NULL;
|
||
PyString_InternInPlace(&s);
|
||
return s;
|
||
}
|
||
|
||
#endif
|
||
|
||
void
|
||
PyString_Fini()
|
||
{
|
||
int i;
|
||
for (i = 0; i < UCHAR_MAX + 1; i++) {
|
||
Py_XDECREF(characters[i]);
|
||
characters[i] = NULL;
|
||
}
|
||
#ifndef DONT_SHARE_SHORT_STRINGS
|
||
Py_XDECREF(nullstring);
|
||
nullstring = NULL;
|
||
#endif
|
||
#ifdef INTERN_STRINGS
|
||
if (interned) {
|
||
int pos, changed;
|
||
PyObject *key, *value;
|
||
do {
|
||
changed = 0;
|
||
pos = 0;
|
||
while (PyDict_Next(interned, &pos, &key, &value)) {
|
||
if (key->ob_refcnt == 2 && key == value) {
|
||
PyDict_DelItem(interned, key);
|
||
changed = 1;
|
||
}
|
||
}
|
||
} while (changed);
|
||
}
|
||
#endif
|
||
}
|