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CU Amiga Super CD-ROM 21
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CU Amiga Magazine's Super CD-ROM 21 (1998)(EMAP Images)(GB)[!][issue 1998-04].iso
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Programming
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Python-1.4
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Python1.4_Source
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urlopmodule.c
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1996-08-26
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178 lines
/***********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.
All Rights Reserved
Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the names of Stichting Mathematisch
Centrum or CWI not be used in advertising or publicity pertaining to
distribution of the software without specific, written prior permission.
STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO
THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE
FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
******************************************************************/
/* urlop module - patterned after stropmodule.c */
/* Skip Montanaro - March 16, '96 */
/* Copyright 1996, Automatrix, Inc */
/* 6/14/96 - bugfix: character strings should be unsigned char */
#include "allobjects.h"
#include "modsupport.h"
#include <ctype.h>
/* XXX This file assumes that the <ctype.h> is*() functions
XXX are defined for all 8-bit characters! */
#include <errno.h>
static object *urlop_quote Py_PROTO((object *, object*));
static object *urlop_unquote Py_PROTO((object *, object *));
static char always_safe[256];
static char *hexd = "0123456789abcdef";
static object *
urlop_quote(self, args)
object *self; /* Not used */
object *args;
{
unsigned char *s, *s_new, *safechars;
unsigned char safe[256];
int i, j, n, safen;
object *old, *new;
int changed = 0;
safechars = "/";
safen = 1;
if (!PyArg_ParseTuple(args, "S|s#", &old, &safechars, &safen))
return NULL;
n = PyString_Size(old);
if (!n) {
INCREF(old);
return old;
}
s = PyString_AsString(old);
// s_new = alloca(n * 3 + 1);
s_new = malloc(n * 3 + 1);
s_new[0] = 0;
/* set up mask */
for (i = 0; i < 256; i++) safe[i] = always_safe[i];
for (i = 0; i < safen; i++) safe[safechars[i]] = 1;
/* test chars against masks */
for (i = 0, j = 0; i < n; i++) {
if (safe[s[i]]) {
s_new[j] = s[i];
j++;
}
else {
s_new[j] = '%'; j++;
s_new[j] = hexd[s[i]/16]; j++;
s_new[j] = hexd[s[i]%16]; j++;
changed = 1;
}
}
if (!changed) {
INCREF(old);
free(s_new);
return old;
}
new=newsizedstringobject(s_new, j);
free(s_new);
return new;
}
static object *
urlop_unquote(self, args)
object *self; /* Not used */
object *args;
{
unsigned char *s, *s_new;
// unsigned char safe[256];
int i, j, n, safen;
object *old, *new;
int changed = 0;
unsigned char xdigit[3];
xdigit[2] = 0;
if (!PyArg_ParseTuple(args, "S", &old)) return NULL;
n = PyString_Size(old);
if (!n) {
INCREF(old);
return old;
}
s = PyString_AsString(old);
// s_new = alloca(n + 1);
s_new = malloc(n + 1);
s_new[0] = 0;
for (i = 0, j = 0; i < n; i++) {
if (s[i] == '%' && isxdigit(s[i+1]) && isxdigit(s[i+2])) {
xdigit[0] = s[i+1];
xdigit[1] = s[i+2];
s_new[j] = strtol(xdigit, 0, 16);
j++;
s_new[j] = 0;
i += 2;
changed = 1;
}
else {
s_new[j++] = s[i];
}
}
if (!changed) {
INCREF(old);
free(s_new);
return old;
}
new=newsizedstringobject(s_new, j);
free(s_new);
return new;
}
/* List of functions defined in the module */
static struct methodlist urlop_methods[] = {
{"quote", urlop_quote, 1},
{"unquote", urlop_unquote, 1},
{NULL, NULL} /* sentinel */
};
void
initurlop Py_PROTO((void))
{
int i;
char c;
initmodule("urlop", urlop_methods);
if (err_occurred())
fatal("can't initialize module urlop");
for (i = 0; i < 256; i++) always_safe[i] = 0;
for (c = 'A'; c <= 'Z'; c++) always_safe[c] = 1;
for (c = 'a'; c <= 'z'; c++) always_safe[c] = 1;
for (c = '0'; c <= '9'; c++) always_safe[c] = 1;
always_safe['_'] = always_safe[','] = always_safe['.'] =
always_safe['-'] = 1;
}