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602 lines
11 KiB
C
602 lines
11 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 not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior permission.
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STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
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THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
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FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* strop module */
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#include "allobjects.h"
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#include "modsupport.h"
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#include <ctype.h>
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/* XXX This file assumes that the <ctype.h> is*() functions
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XXX are defined for all 8-bit characters! */
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#include <errno.h>
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static object *
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split_whitespace(s, len)
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char *s;
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int len;
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{
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int i, j, err;
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object *list, *item;
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list = newlistobject(0);
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if (list == NULL)
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return NULL;
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i = 0;
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while (i < len) {
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while (i < len && isspace(Py_CHARMASK(s[i]))) {
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i = i+1;
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}
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j = i;
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while (i < len && !isspace(Py_CHARMASK(s[i]))) {
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i = i+1;
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}
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if (j < i) {
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item = newsizedstringobject(s+j, (int)(i-j));
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if (item == NULL) {
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DECREF(list);
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return NULL;
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}
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err = addlistitem(list, item);
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DECREF(item);
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if (err < 0) {
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DECREF(list);
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return NULL;
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}
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}
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}
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return list;
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}
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static object *
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strop_splitfields(self, args)
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object *self; /* Not used */
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object *args;
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{
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int len, n, i, j, err;
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char *s, *sub;
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object *list, *item;
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sub = NULL;
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n = 0;
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if (!newgetargs(args, "s#|z#", &s, &len, &sub, &n))
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return NULL;
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if (sub == NULL)
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return split_whitespace(s, len);
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if (n == 0) {
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err_setstr(ValueError, "empty separator");
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return NULL;
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}
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list = newlistobject(0);
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if (list == NULL)
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return NULL;
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i = j = 0;
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while (i+n <= len) {
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if (s[i] == sub[0] && (n == 1 || strncmp(s+i, sub, n) == 0)) {
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item = newsizedstringobject(s+j, (int)(i-j));
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if (item == NULL)
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goto fail;
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err = addlistitem(list, item);
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DECREF(item);
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if (err < 0)
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goto fail;
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i = j = i + n;
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}
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else
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i++;
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}
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item = newsizedstringobject(s+j, (int)(len-j));
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if (item == NULL)
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goto fail;
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err = addlistitem(list, item);
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DECREF(item);
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if (err < 0)
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goto fail;
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return list;
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fail:
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DECREF(list);
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return NULL;
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}
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static object *
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strop_joinfields(self, args)
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object *self; /* Not used */
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object *args;
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{
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object *seq, *item, *res;
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object * (*getitem) FPROTO((object *, int));
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char *sep, *p;
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int seplen, seqlen, reslen, itemlen, i;
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sep = NULL;
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seplen = 0;
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if (!newgetargs(args, "O|s#", &seq, &sep, &seplen))
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return NULL;
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if (sep == NULL) {
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sep = " ";
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seplen = 1;
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}
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if (is_listobject(seq)) {
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getitem = getlistitem;
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seqlen = getlistsize(seq);
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}
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else if (is_tupleobject(seq)) {
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getitem = gettupleitem;
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seqlen = gettuplesize(seq);
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}
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else {
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err_setstr(TypeError, "first argument must be list/tuple");
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return NULL;
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}
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reslen = 0;
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for (i = 0; i < seqlen; i++) {
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item = getitem(seq, i);
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if (!is_stringobject(item)) {
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err_setstr(TypeError,
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"first argument must be list/tuple of strings");
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return NULL;
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}
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if (i > 0)
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reslen = reslen + seplen;
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reslen = reslen + getstringsize(item);
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}
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if (seqlen == 1) {
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/* Optimization if there's only one item */
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item = getitem(seq, 0);
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INCREF(item);
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return item;
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}
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res = newsizedstringobject((char *)NULL, reslen);
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if (res == NULL)
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return NULL;
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p = getstringvalue(res);
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for (i = 0; i < seqlen; i++) {
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item = getitem(seq, i);
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if (i > 0) {
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memcpy(p, sep, seplen);
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p += seplen;
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}
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itemlen = getstringsize(item);
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memcpy(p, getstringvalue(item), itemlen);
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p += itemlen;
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}
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if (p != getstringvalue(res) + reslen) {
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err_setstr(SystemError, "strop.joinfields: assertion failed");
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return NULL;
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}
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return res;
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}
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static object *
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strop_find(self, args)
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object *self; /* Not used */
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object *args;
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{
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char *s, *sub;
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int len, n, i;
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if (getargs(args, "(s#s#i)", &s, &len, &sub, &n, &i)) {
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if (i < 0)
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i += len;
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if (i < 0)
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i = 0;
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}
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else {
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err_clear();
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if (!getargs(args, "(s#s#)", &s, &len, &sub, &n))
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return NULL;
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i = 0;
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}
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if (n == 0)
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return newintobject((long)i);
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len -= n;
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for (; i <= len; ++i)
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if (s[i] == sub[0] &&
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(n == 1 || strncmp(&s[i+1], &sub[1], n-1) == 0))
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return newintobject((long)i);
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return newintobject(-1L);
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}
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static object *
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strop_rfind(self, args)
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object *self; /* Not used */
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object *args;
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{
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char *s, *sub;
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int len, n, i, j;
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if (getargs(args, "(s#s#i)", &s, &len, &sub, &n, &i)) {
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if (i < 0)
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i += len;
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if (i < 0)
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i = 0;
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}
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else {
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err_clear();
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if (!getargs(args, "(s#s#)", &s, &len, &sub, &n))
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return NULL;
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i = 0;
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}
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if (n == 0)
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return newintobject((long)len);
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for (j = len-n; j >= i; --j)
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if (s[j] == sub[0] &&
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(n == 1 || strncmp(&s[j+1], &sub[1], n-1) == 0))
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return newintobject((long)j);
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return newintobject(-1L);
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}
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static object *
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strop_strip(self, args)
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object *self; /* Not used */
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object *args;
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{
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char *s;
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int len, i, j;
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if (!getargs(args, "s#", &s, &len))
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return NULL;
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i = 0;
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while (i < len && isspace(Py_CHARMASK(s[i]))) {
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i++;
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}
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j = len;
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do {
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j--;
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} while (j >= i && isspace(Py_CHARMASK(s[j])));
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j++;
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if (i == 0 && j == len) {
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INCREF(args);
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return args;
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}
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else
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return newsizedstringobject(s+i, j-i);
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}
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static object *
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strop_lower(self, args)
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object *self; /* Not used */
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object *args;
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{
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char *s, *s_new;
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int i, n;
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object *new;
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int changed;
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if (!getargs(args, "s#", &s, &n))
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return NULL;
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new = newsizedstringobject(NULL, n);
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if (new == NULL)
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return NULL;
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s_new = getstringvalue(new);
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changed = 0;
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for (i = 0; i < n; i++) {
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int c = Py_CHARMASK(*s++);
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if (isupper(c)) {
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changed = 1;
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*s_new = tolower(c);
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} else
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*s_new = c;
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s_new++;
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}
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if (!changed) {
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DECREF(new);
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INCREF(args);
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return args;
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}
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return new;
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}
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static object *
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strop_upper(self, args)
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object *self; /* Not used */
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object *args;
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{
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char *s, *s_new;
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int i, n;
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object *new;
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int changed;
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if (!getargs(args, "s#", &s, &n))
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return NULL;
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new = newsizedstringobject(NULL, n);
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if (new == NULL)
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return NULL;
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s_new = getstringvalue(new);
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changed = 0;
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for (i = 0; i < n; i++) {
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int c = Py_CHARMASK(*s++);
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if (islower(c)) {
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changed = 1;
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*s_new = toupper(c);
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} else
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*s_new = c;
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s_new++;
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}
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if (!changed) {
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DECREF(new);
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INCREF(args);
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return args;
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}
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return new;
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}
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static object *
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strop_swapcase(self, args)
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object *self; /* Not used */
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object *args;
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{
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char *s, *s_new;
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int i, n;
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object *new;
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int changed;
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if (!getargs(args, "s#", &s, &n))
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return NULL;
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new = newsizedstringobject(NULL, n);
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if (new == NULL)
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return NULL;
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s_new = getstringvalue(new);
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changed = 0;
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for (i = 0; i < n; i++) {
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int c = Py_CHARMASK(*s++);
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if (islower(c)) {
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changed = 1;
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*s_new = toupper(c);
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}
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else if (isupper(c)) {
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changed = 1;
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*s_new = tolower(c);
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}
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else
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*s_new = c;
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s_new++;
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}
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if (!changed) {
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DECREF(new);
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INCREF(args);
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return args;
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}
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return new;
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}
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static object *
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strop_atoi(self, args)
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object *self; /* Not used */
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object *args;
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{
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extern long mystrtol PROTO((const char *, char **, int));
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extern unsigned long mystrtoul PROTO((const char *, char **, int));
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char *s, *end;
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int base = 10;
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long x;
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if (args != NULL && is_tupleobject(args)) {
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if (!getargs(args, "(si)", &s, &base))
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return NULL;
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if (base != 0 && base < 2 || base > 36) {
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err_setstr(ValueError, "invalid base for atoi()");
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return NULL;
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}
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}
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else if (!getargs(args, "s", &s))
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return NULL;
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errno = 0;
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if (base == 0 && s[0] == '0')
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x = (long) mystrtoul(s, &end, base);
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else
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x = mystrtol(s, &end, base);
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if (*end != '\0') {
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err_setstr(ValueError, "invalid literal for atoi()");
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return NULL;
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}
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else if (errno != 0) {
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err_setstr(OverflowError, "atoi() literal too large");
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return NULL;
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}
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return newintobject(x);
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}
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static object *
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strop_atol(self, args)
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object *self; /* Not used */
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object *args;
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{
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char *s, *end;
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int base = 10;
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object *x;
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if (args != NULL && is_tupleobject(args)) {
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if (!getargs(args, "(si)", &s, &base))
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return NULL;
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if (base != 0 && base < 2 || base > 36) {
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err_setstr(ValueError, "invalid base for atol()");
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return NULL;
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}
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}
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else if (!getargs(args, "s", &s))
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return NULL;
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x = long_escan(s, &end, base);
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if (x == NULL)
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return NULL;
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if (base == 0 && (*end == 'l' || *end == 'L'))
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end++;
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if (*end != '\0') {
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err_setstr(ValueError, "invalid literal for atol()");
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DECREF(x);
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return NULL;
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}
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return x;
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}
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static object *
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strop_atof(self, args)
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object *self; /* Not used */
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object *args;
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{
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extern double strtod PROTO((const char *, char **));
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char *s, *end;
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double x;
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if (!getargs(args, "s", &s))
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return NULL;
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errno = 0;
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x = strtod(s, &end);
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if (*end != '\0') {
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err_setstr(ValueError, "invalid literal for atof()");
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return NULL;
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}
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else if (errno != 0) {
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err_setstr(OverflowError, "atof() literal too large");
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return NULL;
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}
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return newfloatobject(x);
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}
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static object *
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strop_translate(self, args)
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object *self;
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object *args;
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{
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char *input, *table, *output;
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int inlen, tablen;
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object *result;
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int i;
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if (!newgetargs(args, "s#s#", &input, &inlen, &table, &tablen))
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return NULL;
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if (tablen != 256) {
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err_setstr(ValueError,
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"translation table must be 256 characters long");
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return NULL;
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}
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result = newsizedstringobject((char *)NULL, inlen);
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if (result == NULL)
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return NULL;
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output = getstringvalue(result);
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for (i = 0; i < inlen; i++) {
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int c = Py_CHARMASK(*input++);
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*output++ = table[c];
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}
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return result;
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}
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/* List of functions defined in the module */
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static struct methodlist strop_methods[] = {
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{"atof", strop_atof},
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{"atoi", strop_atoi},
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{"atol", strop_atol},
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{"find", strop_find},
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{"join", strop_joinfields, 1},
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{"joinfields", strop_joinfields, 1},
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{"lower", strop_lower},
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{"rfind", strop_rfind},
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{"split", strop_splitfields, 1},
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{"splitfields", strop_splitfields, 1},
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{"strip", strop_strip},
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{"swapcase", strop_swapcase},
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{"translate", strop_translate, 1},
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{"upper", strop_upper},
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{NULL, NULL} /* sentinel */
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};
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void
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initstrop()
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{
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object *m, *d, *s;
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char buf[256];
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int c, n;
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m = initmodule("strop", strop_methods);
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d = getmoduledict(m);
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/* Create 'whitespace' object */
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n = 0;
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for (c = 0; c < 256; c++) {
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if (isspace(c))
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buf[n++] = c;
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}
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s = newsizedstringobject(buf, n);
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if (s) {
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dictinsert(d, "whitespace", s);
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DECREF(s);
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}
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|
/* Create 'lowercase' object */
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n = 0;
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for (c = 0; c < 256; c++) {
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if (islower(c))
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buf[n++] = c;
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}
|
|
s = newsizedstringobject(buf, n);
|
|
if (s) {
|
|
dictinsert(d, "lowercase", s);
|
|
DECREF(s);
|
|
}
|
|
|
|
/* Create 'uppercase' object */
|
|
n = 0;
|
|
for (c = 0; c < 256; c++) {
|
|
if (isupper(c))
|
|
buf[n++] = c;
|
|
}
|
|
s = newsizedstringobject(buf, n);
|
|
if (s) {
|
|
dictinsert(d, "uppercase", s);
|
|
DECREF(s);
|
|
}
|
|
|
|
if (err_occurred())
|
|
fatal("can't initialize module strop");
|
|
}
|