mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-12-13 18:27:35 +00:00
84 lines
2.0 KiB
C++
84 lines
2.0 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
*
|
|
* The contents of this file are subject to the Netscape Public License
|
|
* Version 1.0 (the "NPL"); you may not use this file except in
|
|
* compliance with the NPL. You may obtain a copy of the NPL at
|
|
* http://www.mozilla.org/NPL/
|
|
*
|
|
* Software distributed under the NPL is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
|
|
* for the specific language governing rights and limitations under the
|
|
* NPL.
|
|
*
|
|
* The Initial Developer of this code under the NPL is Netscape
|
|
* Communications Corporation. Portions created by Netscape are
|
|
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
|
|
* Reserved.
|
|
*/
|
|
|
|
#include "cstring.h"
|
|
|
|
#include "xpassert.h"
|
|
|
|
void
|
|
cstring::operator+= (const char *s)
|
|
{
|
|
if (s != NULL && s[0] != '\0')
|
|
{
|
|
int newLength = length() + strlen(s);
|
|
reserve (newLength+1, true);
|
|
strcat (data(), s);
|
|
}
|
|
}
|
|
|
|
void
|
|
cstring::truncAt (char c)
|
|
{
|
|
char *cc = strchr (data(), c);
|
|
if (cc) {
|
|
*cc = 0;
|
|
reserve (length()+1, true);
|
|
}
|
|
}
|
|
|
|
char*
|
|
cstring::reserve (int len, Boolean preserve)
|
|
{
|
|
char *dest = space.internal;
|
|
if (haveExternalSpace)
|
|
if (len > cstringMaxInternalLen) // can reuse space
|
|
dest = space.external = (char*) realloc (space.external, len);
|
|
else { // don't need external space
|
|
char *oldExternal = space.external;
|
|
if (preserve) { // can't guarantee preservation since it's shrinking
|
|
memcpy (oldExternal, space.internal, cstringMaxInternalLen);
|
|
dest[cstringMaxInternalLen] = 0;
|
|
}
|
|
free (oldExternal);
|
|
haveExternalSpace = false;
|
|
}
|
|
else
|
|
if (len > cstringMaxInternalLen) { // need new space
|
|
dest= (char*) malloc (len);
|
|
if (preserve)
|
|
memcpy (dest, space.internal, cstringMaxInternalLen);
|
|
space.external = dest;
|
|
haveExternalSpace = true;
|
|
}
|
|
return dest;
|
|
}
|
|
|
|
void
|
|
cstring::assign (const void *sd, int len)
|
|
{
|
|
XP_ASSERT(sd != NULL || len == 0);
|
|
char *dest = reserve (len+1, false);
|
|
|
|
if (sd != NULL)
|
|
memcpy (dest, sd, len);
|
|
|
|
dest[len] = 0;
|
|
}
|
|
|
|
|