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